JP2000351528A - Tension device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tension device capable of pulling a wire around by small force irrespective of an increase of load capacity. SOLUTION: A plurality of pulleys 155, etc., are provided, and a clutch means can connect or separate each pulley 155, etc., and a load device 160 individually. Consequently, since magnitude of braking torque to be given to a wire W is changed in accordance with the number of pulleys 155, etc., connected with the load device 160, it is possible to give variable tensile force to the wire W and give the optimum tensile force in accordance with a diameter of the wire W.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a tension device for applying a predetermined tension to a moving line.

[0002]

2. Description of the Related Art For example, a winding machine for manufacturing a transformer coil used for a power supply or the like is known. First, a conventional winding machine will be briefly described. FIG. 5 is a perspective view showing an example of a conventional winding machine. In FIG.
A line W is supplied from a line source (not shown) toward the winding machine in the direction of the arrow.

[0003] The supplied wire W is first supplied to the tension device 1.
After passing through the nozzle 0 through the thin pipe-shaped nozzle 20 supported by the drive unit 40, the leading end of the nozzle 20 is held by the holding unit 30.

The nozzle 20 is driven by a driving unit 40 to
It is dimensionally movable, and more specifically, its position can be freely changed above the bobbin B held at the tip of the rotating shaft 50, and its posture can also be changed.

The operation of the winding machine will be described. First, the nozzle W is wound around the terminal portion B1 of the bobbin B while the tip of the wire W is sandwiched by the sandwiching portion 30, and the wire W is wound around the terminal portion B1. An operation (beard operation) is performed.

In a state where the wire W is entangled with the terminal portion B1,
The pinching portion 30 moves in a direction away from the bobbin B to cut the end of the line W. When the line W is thick and cutting by movement is difficult, cutting is performed by a nipper supported by a driving unit 40 (not shown). Thereafter, the rotating shaft 50 is rotated at high speed together with the bobbin B. At this time, in synchronism with the rotation of the bobbin B, the nozzle 20 is moved at a predetermined pitch in the longitudinal direction of the bobbin B, thereby preventing the wire from winding around the same location.

When the wire W has been wound around the bobbin B a predetermined number of times, the rotating shaft 50 is stopped. Thereafter, the wire W is entangled with the terminal portion B2 of the bobbin B by the nozzle 20 again, and the wire W is cut, thereby ending the operation of the winding machine.

By the way, in the operation of such a winding machine,
In order to wind the wire W neatly around the bobbin B or to precisely wind it to the specifications required by the user,
It is necessary to apply a constant tension to the wire W to prevent the wire W from becoming slack when being wound. Therefore, the tension device 10 is arranged between the nozzle 20 and the wire supply source,
A constant braking force is applied when the line W moves with the rotation of the bobbin B, so that the line W does not sag.

[0009]

In such a conventional tensioning device, a wire having a relatively small diameter is used, so that the braking force to be applied to the wire is relatively low, about 2 kgf or less. . However, in recent years, there has been a demand for winding a thick wire coil having a diameter of, for example, about 1.6 mm by a winding machine. In such a case, an appropriate braking force to be applied to the wire must be increased to about 10 kgf. Therefore, it is necessary to increase the load capacity of the tension device.

[0010] On the other hand, simply increasing the load capacity of the tension device was expected to cause a new problem. That is, when the winding machine is to be operated for the first time, the wire must be pulled out from the wire supply source by human power, and routed to the pinching portion of the winding machine via the tension device and the nozzle.

However, when the wire is routed through the tension device, a braking force (about 10 kgf) of the tension device is applied to the wire, and a large force is required to route the wire. In particular, since winding workers in coil factories are often women, there is a demand that the force required to route wires be as low as possible.

In addition, if the braking force to be applied to the wire can be changed in multiple stages, it becomes possible to apply the braking force to wires of different diameters using the same tension device.

The present invention has been made in view of such conventional problems, and has as its object to provide a tension device capable of finely adjusting a load capacity over a wide range.

[0014]

SUMMARY OF THE INVENTION To achieve the above objects, the tensioning device of the present invention tensions a wire by engaging the wire moving from a source of the wire to a processing device of the wire. A tension device that engages with the wire, rotates with the movement of the wire, a braking torque device that generates a braking torque, and a clutch device that connects or disconnects the pulley and the braking torque device. The clutch means connects the pulley and the braking torque means, so that the braking torque generated by the braking torque means is transmitted to the pulley, but disconnects the pulley from the braking torque means. By
The braking torque generated by the braking torque means is not transmitted to the pulley, and a plurality of the pulleys are provided, and the clutch means individually connects or disconnects each pulley and the braking torque means. The feature is that it is possible.

The tensioning device of the present invention engages a line that travels from a line source to a line processor,
In a tensioning device for applying tension to the wire, a pulley device that engages with the wire and rotates with the movement of the wire, a braking torque device that generates a braking torque, and connects the pulley device and the braking torque device. Or clutch means for disconnecting, the clutch means connecting the pulley means and the braking torque means,
The braking torque generated by the braking torque means is transmitted to the pulley means, but by separating the pulley means and the braking torque means, the braking torque generated by the braking torque means is not transmitted to the pulley means. Wherein the pulley means includes pulleys having different pulley diameters, and the force applied from the pulley to the line can be changed by engaging the line with a different pulley. It is characterized by.

[0016]

According to the tension device of the present invention, a tension device for applying tension to the line by engaging with the line moving from the supply source of the line to the line processing device,
A pulley that engages with the line and rotates with the movement of the line, braking torque means for generating a braking torque, and clutch means for connecting or disconnecting the pulley and the braking torque means, wherein the clutch means, By connecting the pulley and the braking torque means, the braking torque generated by the braking torque means is transmitted to the pulley, but by separating the pulley and the braking torque means, the braking torque The generated braking torque is not transmitted to the pulley, and a plurality of the pulleys are provided, and the clutch means can individually connect or disconnect each pulley and the braking torque means. Therefore, the magnitude of the braking torque applied to the line varies according to the number of pulleys connected to the braking torque means. To order, a variable tension can be given to the line, thereby depending on the diameter of the wire, it is possible to impart the optimum tension.

The tensioning device of the present invention engages a line that travels from a line source to a line processor,
In a tensioning device for applying tension to the wire, a pulley device that engages with the wire and rotates with the movement of the wire, a braking torque device that generates a braking torque, and connects the pulley device and the braking torque device. Or clutch means for disconnecting, the clutch means connecting the pulley means and the braking torque means,
The braking torque generated by the braking torque means is transmitted to the pulley means, but by separating the pulley means and the braking torque means, the braking torque generated by the braking torque means is not transmitted to the pulley means. Since the pulley means includes pulleys having different pulley diameters, the force applied from the pulley to the wire can be changed by engaging the wire with a different pulley. Optimum tension can be applied according to the wire diameter and the like.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a winding machine including a tension device according to an embodiment of the present invention. FIG. 2 is a view of the winding machine of FIG. 1 cut along line II-II and viewed in the direction of the arrow.

In FIG. 1, a winding machine 100 includes a base 1
10, a protective cover 120 made of a transparent resin disposed on the left end of the base 110, a bobbin support section 130 disposed in the center on the base 110, and a drive section 140 disposed on the right side of the base 110. , A tension device 150 disposed above the driving unit 140.

As shown in FIG. 2, the bobbin support 130
Has a bobbin driving section 131 and a bobbin end holding section 132 in order to pinch an elongated rectangular column-shaped bobbin B in the longitudinal direction, and further, the bobbin driving section 131 has a driving motor for rotating the bobbin B. (Not shown). When the bobbin B is attached or detached, the lever 132a provided on the bobbin end holding portion 132 is tilted to hold the holding shaft 1
32b moves so as to retreat from the bobbin B, so that the bobbin B can be easily attached and detached.
In FIG. 1, the bobbin end holding portion 132 is not shown.

The drive section 140 shown in FIG. 1 has a function of moving the tension device 150 in the longitudinal direction of the bobbin B. More specifically, the lower end of the tension device 150 is attached to the holder 141, and the holder 141
Are driven in the longitudinal direction of the bobbin B along the drive shaft 142 of the drive section 140.

Further, the tensioning device 150 has a plate-shaped main body 151, and on the main body 151,
A first pulley 152, a second pulley 153, a third pulley 154, a fourth pulley 155, and a fifth pulley (tension pulley) 156 are partially disposed from a supply source side of a not-shown line along the drawn line W. It is rotatably arranged by a bearing described later. The fifth pulley 156 has a bar 156.
It is supported by the main body 151 via a. A supply pulley 157 is attached to the holder 141 via a bar 157a between the fifth pulley and the bobbin B,
It is rotatably supported.

The bar 156a is attached to the body mounting end 15 thereof.
6b is pivotally supported with respect to the main body 151, so that the fifth pulley 156 can swing to, for example, a position shown by a dashed line in FIG. Further, the bar 156a is urged upward by the spring force of the spring 158, so that an appropriate tension can be applied to the wire W to eliminate deflection or the like at the time of winding. Note that the spring force of the spring 158 is provided on the main body 151 and includes the adjusting member 1 including a screw to which the upper end of the spring 158 is attached.
The adjustment of the adjustment member 158a allows the tension applied to the wire W to be adjusted according to, for example, the diameter of the wire W.

Next, taking the fourth pulley as an example, the relationship with the braking torque means will be described. FIG. 3 is an enlarged view showing a part III of the configuration of FIG. In FIG. 3, a load device 160, which is braking torque means, is attached to an attachment hole 151a formed in the main body 151 by a bolt 151b. For convenience of explanation, only the relationship between the fourth pulley 155 and the load device 160 shown in FIG. 3 will be described below, but in the present embodiment, the same applies to the second pulley 153 and the third pulley 154. Load device is connected.

The load device 160 has a cup-shaped base 161 fixed to the main body 151. In the center of the base 161, a shaft 162 is disposed so as to pass through the main body 151 horizontally, and is supported by the one-way clutch 163 so as to rotate in one direction. A support plate 164 is attached to the left end of the shaft 162 by a key 166 so as to rotate integrally with the shaft 162.
Is prevented from coming off.

On the outer periphery of the support plate 164, two disks 168 and 169 made of a magnetic material are arranged. Disk 16
A ring-shaped permanent magnet 170 is arranged so as to face 8,169. The permanent magnet 170 has such a characteristic that the magnetic poles alternate in the circumferential direction, and is fixed to the inner periphery of the dial 171. Permanent magnet 170 and disk 168,
169 together with the braking torque means.

An external thread 171a is provided on the outer periphery of the dial 171.
On the other hand, a female screw 161 a is formed on the inner periphery of the side wall of the base 161, and the male screw 171 a and the female screw 1 are formed.
By screwing 61a, the dial 171 becomes
It is attached to the base 161 so that the axial position can be adjusted. Note that a bolt 172 is provided on the outer periphery of the base 161.
An indicator 173 is attached via the dial 1
Since the relative axial position between the base 71 and the base 161 (that is, the distance between the permanent magnet 170 and the disk 168) corresponds to the relative rotation angle, the extension amount of the dial 171 can be determined based on the rotation position indicated by the index 173. It has become.

On the other hand, in FIG. 3, a fourth pulley 155 is provided at the tip of a shaft 162 projecting rightward from the base 161.
It is rotatably supported on a shaft 162. The bolt 174 is provided on the shaft 1 to prevent the fourth pulley 155 from coming off.
62, but the fourth with respect to the shaft 162
It does not limit the rotation of the pulley 155. The first groove 155 a and the second groove 15 are formed on the outer periphery of the fourth pulley 155.
5b, the groove diameter of the first groove 155a (ie, pulley diameter: the same applies hereinafter) is φA, and the groove diameter of the second groove 155b is φB (<φA).

Further, a flange-shaped core 175 is mounted on the outer periphery of the right end of the shaft 162 adjacent to the fourth pulley 155 so as to be integrally rotated by a key 176b. A friction plate 175a is arranged on the bottom wall of the fourth pulley 155 so as to face the core 175,
On its inner side in the radial direction, the spacer 1
75b are arranged. The friction plate 175a
It is movable relative to the fourth pulley 155 in the axial direction, but is attached so as to rotate integrally in the rotation direction. The spacer 175b is provided between the fourth pulley 155 and the core 17.
It functions so as to keep the interval with the number 5 constant. Further, the shaft 16
The center outer periphery of 2 is rotatably supported via a bearing 177 by an electromagnet unit 176 arranged opposite to the core 175. Core 175 and friction plate 17
5a, the spacer 175b, and the electromagnet unit 176,
Construct clutch means.

In this embodiment, when power is not supplied to the electromagnet unit 176 from a power source (not shown),
Since the friction plate 175a is not restrained by the core 175, the fourth pulley 155 can freely rotate with respect to the shaft 162. On the other hand, when power is supplied to the electromagnet unit 176 from a power source (not shown),
The friction plate 175a moves to the left by the electromagnetic force and is pressed against the core 175, so that the fourth pulley 155 causes the shaft 162
It is designed to rotate integrally with.

On the other hand, when the shaft 162 rotates,
68, 169 and the magnet 170 rotate relative to each other. In such a case, rotation resistance is generated in the disks 168 and 169 based on the magnetic force of the magnet 170. Thereby, the shaft 162
, A braking torque can be generated in the fourth pulley 155. This braking torque can be adjusted by rotating the dial 171 and changing the distance between the disk 168 and the magnet 170. Note that the configuration of such a load device is known as disclosed in, for example, Japanese Utility Model Publication No. 2-11420, and will not be described in detail below.

The operation of the clutch means according to this embodiment will be described. First, the wire W is connected to the winding machine 100 shown in FIG.
When powering the fourth pulley 155, the power supply to the electromagnet unit 176 is stopped by a switch (not shown).
Are rotatable relative to the axis 162. Thus, when the wire W is routed around the periphery of the fourth pulley 155, the shaft 162 connected to the load device is disconnected, so that the braking torque is not transmitted to the fourth pulley 155 from the load device. , Thereby the fourth pulley 1
55 can rotate freely without being restrained. The second pulley 153 and the third pulley 154 shown in FIG. 1 are supported by a configuration similar to that of the fourth pulley, so that both pulleys can be rotated substantially without a load. The power when turning is low enough. In each pulley, it is assumed that the wire W is wound around the first groove (155a).

On the other hand, when the winding of the wire W is completed and the winding machine is operated, power supply to the electromagnet unit 176 is restarted by a switch (not shown). Accordingly, the fourth pulley 155 can rotate integrally with the shaft 162, so that the braking torque of the load device is transmitted via the shaft 162 to the fourth pulley 155 that rotates with the movement of the line W.
As described above, the second pulley 153 and the third pulley 153 shown in FIG.
Since the pulley 154 is supported by the same configuration as the fourth pulley 155, appropriate braking torque is transmitted to each pulley, and appropriate tension is applied to the line W engaging with each pulley. The operation of the winding machine will be appropriately supported.

The line W passing through each pulley is indicated by a line
When the bobbin B is supplied from the bobbin 57 to the bobbin B and the bobbin supporting section 130 rotates the bobbin B, a winding is formed around the bobbin B. In the present embodiment, as shown in FIG. 2, since the entire length of the bobbin B is long, the tension device 150 is driven by the driving device 140 in synchronization with the rotation of the bobbin B along the longitudinal direction. The winding is formed uniformly over the entire length of the long bobbin B.

The second pulley 153 and the third pulley 15
The clutch unit of the fourth and fourth pulleys 155 is controlled by a control device (not shown), and a clutch corresponding to an arbitrary pulley is operated in accordance with an operating condition such as a diameter of the line W and a moving speed of the line W. By turning only the means on and off, the amount of braking torque applied to the line W can be adjusted in total.

In this embodiment, the dial 171 is used.
Can be adjusted to adjust the braking torque of the load device applied to the line W. However, the winding torque applied to the line W can also be adjusted by winding the line W around the second groove 155b. it can. That is, the first groove 155
Since the groove diameter φB of the second groove 155b is smaller than the groove diameter φA of a, the braking torque applied to the line W decreases in proportion to the diameter. The groove for winding the wire W can be arbitrarily selected in each of the pulleys 153 to 155.
Therefore, in addition to turning on / off the clutch means of any pulley described above, the amount of braking torque applied to the line W can be adjusted over a wider range and finer by winding the line W around grooves of different diameters. Becomes

FIG. 4 is a sectional view similar to the embodiment of FIG. 3, but showing a pulley according to another embodiment. In another embodiment shown in FIG. 4, the description of the same points (other than the pulleys) in the configuration shown in FIG. 3 is omitted. The pulley 255 shown in FIG. 4 is different from the pulley 155 of FIG. 3 in that three outer circumferential grooves are provided.

More specifically, the first groove 255a, the second groove 255b, and the third groove 2 are formed on the outer periphery of the pulley 255.
55c is formed, the groove diameter of the first groove 255a is φC,
The groove diameter of the second groove 255b is φD, and the groove diameter of the third groove 255c is φE. The dimensional relationship of each groove diameter is φ
C>φD> φE.

As described above, according to the present embodiment, since the pulley 255 is provided with three grooves 255a to 255c, the number of grooves in one pulley is smaller than that in the embodiment of FIG. Has increased, and thus the range of choices in the diameter of the groove around which the wire W is wound is increased, so that the amount of braking torque applied to the wire W can be adjusted more finely.

The pulley 255 shown in FIG. 4 has grooves (255a to 255c) different from the pulley 155 of FIG.
Are also narrow, so that each pulley has a line W
No matter which groove is selected to wind the wire, the wire W does not come off during winding.

As described above, the present invention has been described with reference to the embodiments. However, the present invention should not be construed as being limited to the above embodiments, and it is needless to say that modifications and improvements can be made as appropriate. is there. For example, although an electromagnet is used as the clutch means, a mechanical clutch means (including connection by bolts) may be used without being limited thereto. In the above-described embodiment, the load device and the clutch unit are provided on the second to fourth pulleys.
These may be provided only on arbitrary pulleys.

[0042]

According to the tension device of the present invention, a tension device for applying tension to the line by engaging with the line moving from the supply source of the line to the line processing device. A pulley that engages and rotates with the movement of the line; braking torque means for generating a braking torque; and clutch means for connecting or disconnecting the pulley and the braking torque means. By connecting the braking torque means, the braking torque generated by the braking torque means is transmitted to the pulley, but by separating the pulley and the braking torque means, the braking generated by the braking torque means is controlled. Torque is not transmitted to the pulleys, a plurality of the pulleys are provided, and the clutch means Since the dynamic torque means can be individually connected or disconnected, the magnitude of the braking torque applied to the line changes according to the number of pulleys connected to the braking torque means. , A variable tension can be applied thereto, whereby an optimum tension can be applied according to the diameter of the wire.

The tensioning device of the present invention engages a line moving from a line source to a line processor,
In a tensioning device for applying tension to the wire, a pulley device that engages with the wire and rotates with the movement of the wire, a braking torque device that generates a braking torque, and connects the pulley device and the braking torque device. Or clutch means for disconnecting, the clutch means connecting the pulley means and the braking torque means,
The braking torque generated by the braking torque means is transmitted to the pulley means, but by separating the pulley means and the braking torque means, the braking torque generated by the braking torque means is not transmitted to the pulley means. Since the pulley means includes pulleys having different pulley diameters, the force applied from the pulley to the wire can be changed by engaging the wire with a different pulley. Optimum tension can be applied according to the wire diameter and the like.

[Brief description of the drawings]

FIG. 1 is a side view of a winding machine including a tension device according to an embodiment of the present invention.

FIG. 2 is a view of the winding machine of FIG. 1 cut along line II-II and viewed in a direction of an arrow.

FIG. 3 is an enlarged view showing a part III of the configuration of FIG. 2;

FIG. 4 is a cross-sectional view similar to the embodiment of FIG. 3, but showing a pulley according to another embodiment.

FIG. 5 is a perspective view showing an example of a conventional winding machine.

[Explanation of symbols]

 151 body 152 first pulley 153 second pulley 154 third pulley 155 fourth pulley 162 shaft 170 magnet 175 core 176 electromagnet unit W line B bobbin

Claims (3)

[Claims] 1. A tensioning device for applying tension to a line by engaging the line moving from a source of the line to a line processing device, wherein the tension device engages the line and rotates with the movement of the line. A pulley, braking torque means for generating a braking torque, and clutch means for connecting or disconnecting the pulley and the braking torque means, wherein the clutch means connects the pulley and the braking torque means, The braking torque generated by the braking torque means is transmitted to the pulley, but by separating the pulley and the braking torque means, the braking torque generated by the braking torque means is not transmitted to the pulley. A plurality of pulleys are provided, and the clutch means individually connects each pulley with the braking torque means. Tensioning device, characterized in that it is adapted to be disconnected. 2. A control device according to claim 1, further comprising a control device for controlling said clutch means so as to change the number of said pulleys connected to said braking torque means according to operating conditions. Tension device. 3. A tensioning device for applying tension to a line by engaging the line moving from a source of the line to a line processing device, wherein the tension device engages the line and rotates with the movement of the line. Pulley means, braking torque means for generating a braking torque, and clutch means for connecting or disconnecting the pulley means and the braking torque means, wherein the clutch means connects the pulley means and the braking torque means. Thereby, the braking torque generated by the braking torque means is transmitted to the pulley means, but by separating the pulley means and the braking torque means, the braking torque generated by the braking torque means is transmitted to the pulley means. The pulley means is provided with pulleys having different pulley diameters, and the wire is connected to different pulleys. By engaged, tension device, characterized in that has become possible to change the force applied to the wire from the pulley.