JP2997456B1 - Tension device - Google Patents

Abstract

[Problem] To prevent inertial load from being applied to a wire rod,
Provided is a tension device that can apply an appropriate tension. SOLUTION: After a wire rod 1 is wound around a pulley 4, it is guided to a core from a wire rod guide 11 at a tip end of a tension bar 10. The tension bar 10 is rotatable about a rotation shaft 12 at a base end, and one end of a spring 14 is fixed to a mounting bracket 10A provided at a predetermined position. The other end of the spring 14 is attached to a mounting portion 15 of a moving member 15 movable by a tension adjusting motor 16.
Fixed to A. The control means controls the rotation speed of the delivery control motor 6 directly connected to the rotation shaft 5 of the delivery pulley 4.
Control is performed so that the rotation angle of the tension bar 10 detected by the potentiometer 13 becomes a predetermined angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension device for applying tension to a wire in a winding machine.

[0002]

2. Description of the Related Art Conventionally, as a tensioning device provided in a winding machine for applying a predetermined tension to a wire, for example, JP-A-2-310265 and JP-A-6-255 have been known.
Japanese Patent Application Publication No. 884 and the like have proposed a method of applying tension to a wire using an electromagnetic brake.

FIG. 8 shows a tension device proposed in Japanese Patent Application Laid-Open No. 6-255888.

In this tension device, a wire 100 from a wire source (not shown) is connected to a wire guide 101.
, And wound around a pulley 102 for adding tension, guided by a guide pulley 111 at a tip end of a tension bar 110 via a guide pulley 104, and fed out to a core (not shown). The rotation of the pulley 102 is braked by an electromagnetic brake 103, and a predetermined tension is applied to the wire 100 by the brake.

Further, a tension bar 110 is supported by a fulcrum 112.
, And temporary fluctuations in the tension of the wire 100 (unbalance between the unwinding amount and the winding amount of the wire 100) are absorbed by the rotation of the tension bar 110. In this case, resistance is applied to the rotation of the tension bar 110 by the DC motor 113, and the wire 1
00 is added with tension by this resistance.

Further, the rotation angle of the tension bar 110 is fed back by a potentiometer 114,
The braking force by the electromagnetic brake 103 is adjusted so that the angle of the tension bar 110 returns to the initial position.

[0007]

However, in such a conventional electromagnetic brake type tension device, an excessive inertial load due to an inertial force acts on the pulley 102 on the wire 100, for example, when there is a sudden change in the tension. As a result, the wire 100 is disconnected.

In order to avoid the effect of the inertial load on the wire, a method of applying tension to the wire by a frictional force caused by bringing a friction member into contact with the wire can be considered. However, such a friction method cannot prevent the wire from being worn.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a tension device capable of applying an appropriate tension while preventing an inertial load from being applied to a wire.

[0010]

According to a first aspect of the present invention, there is provided a tension device provided in a winding machine for winding a wire around a winding core, comprising: a tension bar rotatable around a rotation fulcrum;
The wire guide attached to this tension bar and the support
A predetermined position of the relay bar rotatable around a point and the tension
A predetermined position between the pivot of the bar and the wire guide
And a first spring having both ends fixed to each other.
The end is fixed so that the fixed position is adjustable and the other end is front
Attach to the relay bar so that the attachment position is variable
And the rotation angle of the relay bar
A lockable stopper, a detecting means for detecting a rotation angle of the tension bar, and a feeding speed control means for controlling a feeding speed of the wire so that the turning angle detected by the detecting means becomes a predetermined angle. With
The fixed position of one end of the second spring and the other end
Change the attachment position and fix the relay bar with the stopper
Alternatively, the elastic force exerted on the tension bar by the first and second springs when the tension bar is at a predetermined rotation angle can be switched by releasing the fixing .

According to a second aspect of the present invention, in a tension device provided in a winding machine for winding a wire around a winding core, a tension bar rotatable around a rotation fulcrum and a wire guide attached to the tension bar are provided. And the tension bar
At a predetermined position between the rotation fulcrum and the wire guide.
A plurality of springs which are detachably attached, a detecting means for detecting a turning angle of the tension bar, and a feeding speed of the wire rod controlled such that the turning angle detected by the detecting means is a predetermined angle. together and a feeding speed control means, attached to said tension bar
By changing the number of springs is, the split when the tension bar is in a predetermined rotation angle
The elastic force exerted by the tension on the tension bar can be switched.
I did .

[0012]

[0013]

[0014]

[0015]

In the first and second aspects of the present invention, the wire is guided from the tension device to the core and wound around the core. In this case, the speed at which the wire is fed from the tension device is changed by the rotation. The feeding speed is controlled by the feeding speed control means so that the angle becomes a predetermined angle. The wire feeding speed is balanced with the winding speed on the core, and a predetermined tension is applied to the wire by a tension bar. In this state, if the speed of winding the wire around the core changes, the tension of the wire changes. The change is absorbed by changing the rotation angle of the tension bar. Then, since the change in the rotation angle of the tension bar is fed back to the control means via the detection means,
The control means immediately adjusts the wire feeding speed so that the rotation angle of the tension bar becomes the predetermined angle, and the tension applied to the wire is returned to the predetermined value.

As described above, according to the present invention, when responding to the tension fluctuation, the feeding speed itself of the wire is controlled, and there is no room for applying any inertial load to the wire, and the tension which transiently absorbs the tension fluctuation is applied. Since the bar is small in weight and the inertial load does not cause a problem, disconnection or the like due to the inertial load can be prevented.

Further, in the present invention, the elastic member exerts an elastic force on the tension bar at a predetermined position between the rotation fulcrum of the tension bar and the wire guide, so that the elastic force from the elastic member is not changed so much. Can be greatly changed, and the transitional absorption of tension can be performed smoothly.

Further , according to the present invention , the switching means can switch the elastic force exerted on the tension bar by the elastic member when the tension bar is at the predetermined rotation angle. Such,
It can easily cope with the case where the tension of the wire is to be greatly reduced .

In the first invention, the tension bar acts on the tension bar.
Spring force is fixed or released by the stopper.
Can be variable for the system. Also, inside one end of the second spring
By changing the attachment position to the joint bar, the second switch
Adjust the length of the moment arm of the spring force of the spring
And the fixed position of the other end of the second spring
The adjustment can also adjust the initial length of the second spring.
Therefore, these adjustments will affect the tension bar.
The force from the spring used can be adjusted. No.
In the invention of the second aspect, the slide attached to the tension bar is provided.
By reducing the number of springs, the tension bar
The spring force acting on the coil bobbin
Significantly increases wire tension, such as when working on terminals
It can easily cope with a case where it is desired to lower it.

[0020]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 and 2 show first and second embodiments described later .
With the configuration of the present invention that is common to the first and second embodiments.
1 shows a tension device that serves as a reference for describing an embodiment .

This tension device is provided in a winding machine,
A predetermined tension is applied to the wire 1 guided from a wire source (not shown), and the wire 1 is guided to a winding core such as a coil bobbin (not shown).

As shown in the figure, a guide pulley 3, a feeding control pulley 4, and a tension bar 10 are provided on the front surface of a casing 2 of the tension device. The wire 1 is guided to a pay-out pulley 4 via a guide pulley 3, is wound around the pay-out pulley 4, is then fed out from a wire guide 11 at the tip of a tension bar 10, and is wound around the outer periphery of the core.

The rotating shaft 5 of the feed pulley 4 is directly connected to a feed control motor 6 housed in the casing 2. The rotation speed of the feeding control motor 6 is controlled by control means (not shown). As a result, the feed speed (feed amount) of the wire 1 is controlled by the feed control motor 6.
Is controlled directly by the control means via the rotational speed of

The tension bar 10 has a pivot shaft 12 at the base end.
Can be turned up and down around the fulcrum. The rotation angle of the rotation shaft 12 is detected by a potentiometer 13 housed in the casing 2.

One end of a spring 14 is attached to a mounting bracket 10 A at a predetermined position between the base end and the tip of the tension bar 10, and the tension bar 10 is tilted by the spring 4.

The other end of the spring 14 is fixed to a mounting portion 15A of a moving member (mounting member) 15. The moving member 15 is screwed into a ball screw 16A of a tension adjusting motor 16, and the ball screw 16A
Moves along the guide shaft 17 according to the rotation of.
Thus, the fixed position of the other end of the spring 14 can be adjusted. The operation of the tension adjusting motor 16 is controlled by the control means.

Next, the operation will be described.

The wire 1 from the wire source is guided to the core through a tension device, and is wound around the core. In this case, the wire feed speed (feed amount) from the feed pulley 4 of the tension device is controlled by the rotation speed control of the feed control motor 6 so as to balance the wire feed speed (wind amount) on the core. The tension bar 10 is held at a predetermined rotation angle. Accordingly, the spring force of the spring 14 acts on the wire 1 in accordance with the rotation angle of the tension bar 10, and a predetermined tension based on the spring force is applied.

In such a winding operation, if the winding speed (winding amount) of the wire on the winding core changes, the tension applied to the wire 1 changes. When the tension fluctuates, the rotation angle of the tension bar 10 changes accordingly. As a result, the variation in tension is
It is absorbed by the change in the rotation angle of the tension bar 10, so that excessive tension is not applied to the wire 1.

Further, in this case, a change in the rotation angle of the tension bar 10 is detected by the potentiometer 13, and
It is fed back to the control means. The control means receiving such feedback controls the rotation speed of the feed control motor 6 so that the rotation angle of the tension bar 10 returns to the predetermined angle, and controls the wire feed speed from the feed pulley 4 to the winding core. Balance with the winding speed. Thereby, the rotation angle of the tension bar 10 returns to the predetermined angle, and the tension applied to the wire 1 returns to the predetermined value.

When it is desired to change the tension acting on the wire 1 from the tension bar 10, the movable member 15 is moved by driving the tension adjusting motor 16 to adjust the fixed position of the end of the spring 14. This makes it possible to change the length of the spring 14 when the tension bar 10 is at a predetermined rotation angle, and to adjust the spring force exerted on the tension bar 10 from the spring 14, so that the tension acting on the wire 1 is adjusted. Can be desired.

As described above, according to the present invention, when the tension of the wire 1 fluctuates (fluctuation in the winding speed) during the winding operation, the tension fluctuation is caused by the tension bar 10.
And the change in the rotation angle of the tension bar 10 is fed back to directly control the feeding speed of the wire 1 from the feeding pulley 4, whereby the tension of the wire 1 becomes a predetermined value. Is exactly restored to the value of Therefore, there is no room for an inertial load to act on the wire 1 from the feeding pulley 4 whose rotation speed itself is directly controlled, and the wire 1 is not temporarily subjected to excessive tension due to the inertial load. In addition, disconnection and the like can be prevented. Since the weight of the tension bar 10 that transiently absorbs the tension fluctuation of the wire 1 is small, the inertial load acting on the wire 1 from the tension bar 1 does not matter.

In the present invention, a pivot point (rotating shaft 12) is provided at the base end of the tension bar 10, and the tension applying spring 14 is connected to the pivot point (base end) of the tension bar 10 and an extension end ( (A tip). Therefore, as shown in FIG. 3, for example, a pivot (a pivot 21) is provided at an intermediate point of the tension bar 20.
In the case of a tension bar having the same length as compared with the case where the wire 1 is fed out from the guide 22 at the distal end 20A and the spring 23 is attached to the mounting bracket 20B at the proximal end, fluctuation of the payout end is made larger. Can be. That is, when the tension bar 10 and the tension bar 20 have the same length, the spring 14 and the spring 23 are the same, and the length from the rotating shaft 12 to the mounting bracket 10A and the length from the rotating shaft 21 to the mounting bracket 20B. If they are the same, the amount of change in the wire guide 11 is larger than the amount of change in the guide 22 for the expansion and contraction of the springs 14 and the spring 23 with the same spring force. Therefore, according to the present invention, the position of the wire rod guide 11 can be largely changed without changing the tension applied from the tension bar 10 so much, and the transitional absorption of the tension can be performed more smoothly. .

Since the moving member 15 for determining the fixed position of the end of the spring 14 can be moved by the tension adjusting motor 16 controlled by the control means, the magnitude of the tension acting on the wire 1 is continuously changed. It can be varied, and the accuracy and flexibility of the tension control are increased.

FIGS. 4 and 5 show a tension device according to a first embodiment of the present invention.

This embodiment is shown in FIGS.
Only the mechanism that switches the spring force of the spring that exerts the spring force on the tension bar 10 is different from the tension device that is used. Therefore, hereinafter, the configuration of the mechanism for switching the spring force will be mainly described.

In the present embodiment, the springs exerting a spring force on the tension bar 10 are two springs 31,
32.

One end of the spring 31 is fixed to the tension bar 10 at the mounting bracket 10 A, and the other end is fixed to the tip of a relay bar 34 that is rotatable around a pivot point 33. One end of the spring 32 is fixed to the adjusting screw 35, and the other end is attached to a predetermined position of the relay bar 34 via a locking member 37. The locking member 3
The position at which the other end of the spring 32 is attached to the relay bar 34 is variable. The adjusting screw 35 is screwed to the fixing member 36, and the position of one end of the spring 32 can be adjusted by the screwed position.

The rotation angle of the relay bar 34 can be fixed at a predetermined position by a stopper 38. When the rotation angle of the relay bar 34 is fixed as described above, only the spring force of the spring 31 acts on the tension bar 10.

The fixing of the stopper 38 can be released by rotating the stopper 38 around the rotation fulcrum 33 by driving the rotary actuator 39 as shown in FIG. When the rotation of the relay bar 34 becomes free by this release, the spring force of both the springs 31 and 32 acts on the tension bar 10. In this case, since the spring coefficient of the spring 32 is set to be lower than that of the spring 31, the spring 31 contracts and the spring 32 expands when the stopper 38 is released, and the spring force (tension) of the entire springs 31 and 32 is increased. The force acting on the bar 10 is reduced. Further, in this case, since the moment arm of the spring 32 is smaller than the moment arm of the spring 31, the force acting on the tension bar 10 is reduced when the springs 31 and 32 are connected in series without the relay bar 32 therebetween. It can be made smaller in comparison.

As described above, in the present embodiment, the spring force acting on the tension bar 10 can be made variable in two systems, and the degree of freedom in tension adjustment is increased. Specifically, when it is desired to greatly reduce the tension acting on the wire 1 such as when the wire 1 is wrapped around the terminal of the coil bobbin, the fixing of the relay bar 34 by the stopper 38 is released and the connection is performed in series. The tension can be reduced by using the springs 31 and 32 as springs for adding tension.

In this embodiment, the spring 32
The length of the moment arm of the spring force of the spring 32 can be adjusted by changing the attachment position of the end portion to the relay bar 34 by the locking member 37, and the adjustment position of the adjusting screw 36 can be adjusted. The initial length of the spring 32 can also be adjusted. Therefore, the force from the spring 32 acting on the tension bar 10 can be adjusted by these adjustments.

FIGS. 6 and 7 show a second embodiment of the present invention.

This embodiment differs from the above-described first embodiment only in the mechanism for switching the spring force of the spring exerting a spring force on the tension bar 10. Therefore, hereinafter, the configuration of the mechanism for switching the spring force will be mainly described.

In the present embodiment, the spring exerting a spring force on the tension bar 10 includes a pair of springs 41 and 42 housed in parallel in the housing case 40. One ends of these springs 41 and 42 are mounted on mounting brackets 10B and 10C of the tension bar 10, respectively. The other ends of the springs 41 and 42 are
Chucks 43 and 4 respectively fixed to the casing 2 side
4 makes it possible to hold. Note that the chuck 43,
44 is provided by chuck cylinders 45 and 46, respectively.
The springs 41 and 42 whose grips have been released can move forward to grip the ends again.

With such a configuration, the chucks 43, 4
When both ends of the springs 41 and 42 are gripped by both of the springs 4, the spring force acts on the tension bar 10 from both of the springs 41 and 42 arranged in parallel. On the other hand, one of the chucks 43 and 44 is
When the ends of the first and second parts are separated, the tension bar 10
Is applied only from one of the springs 41 and 42. In this way, by preventing the spring force from either one of the springs 41 and 42 from acting, the spring force acting on the tension bar 10 can be weakened, such as at the time of tying work to the coil bobbin terminal.
It can easily cope with a case where the tension of the wire 1 is to be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing a tension device serving as a reference of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a front view showing the tension device when a rotation fulcrum is provided near the middle of the tension bar.

FIG. 4 is a front view showing the first embodiment of the present invention.

FIG. 5 is a front view showing a state where the fixing of the relay bar by the stopper is released.

FIG. 6 is a front view showing a second embodiment of the present invention.

FIG. 7 is a sectional view of the same.

FIG. 8 is a front view showing a conventional tension device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wire rod 4 Feeding pulley 6 Feeding control motor 10 Tension bar 10A Mounting bracket 11 Wire guide 12 Rotating shaft 13 Potentiometer 14 Spring 15 Moving member (attaching member) 16 Tension adjusting motor 31 Spring 32 Spring 34 Relay bar 35 Adjusting screw 37 Lock Member 38 Stopper 41 Spring 42 Spring 43 Chuck 44 Chuck

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 59/00-59/40 H01F 41/06

Claims (2)

(57) [Claims] 1. A tension device provided in a winding machine for winding a wire around a core, comprising: a tension bar rotatable around a rotation fulcrum; a wire guide attached to the tension bar ; A predetermined position of the relay bar that is rotatable around
A predetermined position between the rotation fulcrum of the bar and the wire guide
And a first spring having both ends fixed to the device, one end of which is fixed so that the fixed position can be adjusted, and the other end of which is fixed.
Attached to the relay bar so that the attachment position is variable
A second spring, a stopper capable of fixing the rotation angle of the relay bar, detection means for detecting the rotation angle of the tension bar, and a rotation angle detected by the detection means being a predetermined angle. together and a feeding speed control means for controlling the feeding speed of the wire so that, taken in a fixed position and the other end of the one end of the second spring
Change the attachment position and fix the relay bar with the stopper
Alternatively, the tension device can switch the elastic force exerted on the tension bar by the first and second springs when the tension bar is at a predetermined rotation angle by releasing the fixing . 2. A core tension device provided in a winding machine for winding a wire on a tension bar rotatable at pivot point around a wire guide attached to the tension bar, the tension Between the pivot point of the bar and the wire guide
A plurality of switches detachably mounted in parallel at predetermined positions
Pulling and, detecting means for detecting the rotation angle of the tension bar, with the rotation angle detected by the detection means and a feeding speed control means for controlling the feeding speed of the wire so as to have a predetermined angle , The number of springs attached to the tension bar
Tensioning device characterized by the by changing the spring when the tension bar is in a predetermined rotation angle is possible to switch the elastic force on the tension bar.