JP2001151414A - Wire delivery device and wire delivery unit therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact wire delivery device which is capable of restraining changes in tension applied to a wire and delivering out the wire at low tension. SOLUTION: This wire delivery device is provided with a bobbin shaft 13 to which a bobbin 12 permitting the wire 11 to be wound can be fixed coaxially, a pair of pistons 14a, 14b which are disposed so as to get close or get off to/ from each other with the bobbin shaft 13 sandwiched in such a direction as to intersect the bobbin shaft 13, and brought into pressure-contact with the bobbin shaft 13 from both directions by the pressure of fluid supplied into a fluid chamber, and apply tension to the wire 11 delivered out from the bobbin 12 with rotation of the bobbin shaft 13, a compressor 16 supplying the fluid to the fluid chamber, and a regulator 17 disposed on a fluid passage from the compressor to the fluid chamber, and regulating the feeding rate of the fluid to the fluid chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire feeding device and a wire feeding unit for feeding a wire while maintaining a predetermined tension.

[0002]

2. Description of the Related Art In some cases, wires such as electric wires are supplied in a state of being wound on a bobbin. In the case of processing the supplied wire in this manner, it is possible to feed the wire from the bobbin while applying tension to the wire. Is being done.

Here, a conventional wire feeding device for feeding a wire will be described.

FIG. 7 is a perspective view showing a main part of a conventional wire feeding device, FIG. 8 is an explanatory view showing the operation principle of the wire feeding device of FIG. 7, and FIG. 9 is provided with a plurality of wire feeding devices of FIG. It is the schematic which shows the wire feeding unit.

As shown in FIG. 7, the conventional wire feeding device is urged rearward in the feeding direction and has a cam 1.
A guide pulley 103 rotatably attached to a pulley arm 102 swinging about a fulcrum 01, and a link 104 displaced in the vertical direction by the action of a cam 101 pressed against a cam 101 and rotated according to the swing of the pulley arm 102.
An adjustment spring 105 for pulling the link 104 in the opposite direction to the cam 101; and a brake pulley 107 installed below the link 104 with a brake band 106, one end of which is screwed, wound around half a circumference.
And a brake rod 108 attached to the link 104 and connected to the other end of the brake band 106 to move up and down by the displacement of the link 104 to change the tightening force of the brake band 106 on the brake pulley 107. The brake pulley 107 is fixed to a bobbin shaft 111 on which a bobbin 110 around which a wire 109 is wound is coaxially mounted.
The rotation of 11 rotates. Then, the wire 109 wound around the bobbin 110 is wound around the two guide pulleys 102, 103 rotatably provided on the link 104 and the guide pulley 103 of the pulley arm 102 in this order, and is fed out. The tension of the adjusting spring 105 is adjustable.

[0008] As shown in FIG. 8, such a wire feeding device is provided with a pulley arm 102 during normal feeding.
Is in the direction opposite to the direction in which the wire 109 is extended (solid line), and the link 104 is located above and the brake pulley 1
A predetermined tightening force is applied to 07 by the brake band 106. As a result, the bobbin shaft 111 rotates with a rotation resistance corresponding to the tightening force, and therefore, the wire 109 is fed out in a state where a tension corresponding to the rotation resistance is applied.

Here, if the tension of the wire 109 increases for some reason, the wire 109 becomes difficult to be extended, and the pulley arm 102 swings in the extension direction of the wire 109 (two-dot chain line portion). Then, the brake rod 108 is lowered by the link 104 displaced downward by the swing of the pulley arm 102, and the brake pulley 107
Of the brake band 106 is weakened. Thereby, the rotational resistance of the bobbin shaft 111 decreases, and the tension of the wire 109 decreases.

Thereafter, when the cause of the increase in the tension is eliminated, the pulley arm 102 swings backward again in the extending direction, and the tightening force of the brake band 106 returns to the conventional state.

As described above, in the conventional wire feeding device, the tension acting on the wire 109 is changed by the tightening force of the brake band 106 on the brake pulley 107, which is changed via the link 104 and the brake rod 108 by the swing of the pulley arm 102. I was adjusting.

Since the pressing force of the link 102 against the cam 101 is adjusted by operating the adjusting spring 105, if the adjusting spring 105 is operated to reduce the pressing force of the link 104 against the cam 101, the pulley arm 102 becomes a wire. It becomes easy to swing in the feeding direction of the wire 109, and the tension of the wire 109 is easily reduced.

The wire feeding unit is provided with a plurality of wire feeding devices having the above-described configuration. In the case shown in FIG. 9, a total of 94 bobbins 110 (47 on one side × 2) are provided. is set up.

[0012]

In such a wire feeding device, the fluctuation width of the wire tension due to the swing of the pulley arm is large, and the wire is excessively tensioned or the wire is loosened due to the loss of the tension. The wire cannot be fed smoothly.

Further, for a wire having a small diameter, the tightening force of the brake band on the brake pulley is large, so that an excessive tension is applied when the wire is extended, and the wire is elongated and the extension itself becomes impossible.

Here, in the wire feeding unit, it is necessary to equalize the tension of the wires in a plurality of wire feeding devices. This is because, when performing processing to seal a plurality of wires in parallel with each other, if the tension of the plurality of wires fed out is different from each other, the tension of the sealed wires themselves is different from each other and the sealing portion is in the sealing portion. This is because bending may occur.

However, in the above-described conventional technique, the adjustment of the brake band is delicate, and there is an individual difference between the wire feeding devices. Therefore, the tightening force of each brake band in the plurality of wire feeding devices is adjusted. It is difficult to equalize the tension of the wires with each other.

Further, in the conventional wire feeding device, three guide pulleys are provided, and the wire must be wound around these guide pulleys in order. Then, for example, in the case of the wire feeding unit provided with 94 bobbins as described above, a wire is hung on 282 guide pulleys, and an extremely long time is required for the preparation work.

Further, as shown in FIGS. 7 and 8, the conventional wire feeder is long in the vertical direction, and a swinging pulley arm is mounted on the upper part. When a unit is configured, it is necessary to increase the interval between bobbins as shown in FIG. For this reason, the entire wire feeding unit becomes large, and space efficiency is hindered.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wire feeding device capable of suppressing a variation in tension applied to a wire and a wire feeding unit using the same.

It is another object of the present invention to provide a wire feeding device capable of feeding a wire with a low tension and a wire feeding unit using the same.

Still another object of the present invention is to provide a wire feeding device capable of easily and evenly adjusting the tension of a wire between a plurality of devices, and a wire feeding unit using the same.

Still another object of the present invention is to provide a wire feeding device which does not require a guide pulley around which a wire is wound, and a wire feeding unit using the same.

It is another object of the present invention to provide a compact wire feeding device and a wire feeding unit using the same.

[0023]

In order to solve the above-mentioned problems, a wire feeding device according to the present invention is provided with a bobbin shaft on which a bobbin on which a wire is wound can be coaxially fixed, and a bobbin shaft supplied to a fluid chamber. At least one piston that presses against the bobbin shaft from the radial direction by the pressure of the fluid to impart rotational resistance to the bobbin shaft and imparts tension to the wire that is unreeled from the bobbin with the rotation of the bobbin shaft, And a regulator that is provided on a fluid path from the compressor to the fluid chamber and adjusts a supply amount of the fluid to the fluid chamber.

Further, in the wire feeding unit according to the present invention, a plurality of such wire feeding devices are installed, and the wires wound on the bobbins of the plurality of wire feeding devices can be fed simultaneously. It is characterized by.

According to such an invention, a constant tension is always applied to the wire, and it is possible to suppress a variation in the tension applied to the wire.

Further, since the tension of the wire can be freely adjusted over a wide range, it is possible to pay out the wire with a low tension.

Further, it is possible to easily and evenly adjust the wire tension between a plurality of devices simply by applying the same fluid pressure to the piston.

Further, tension is applied to the wire by the rotational resistance applied to the bobbin shaft in accordance with the pressure contact force of the piston, so that a guide pulley for applying tension to the wire is not required.

Since an external mechanism for applying tension to the wire is not required, the size of the apparatus can be significantly reduced.

[0030]

Embodiments of the present invention will be described below more specifically with reference to the drawings. Here, the same reference numerals are given to the same members in the attached drawings,
In addition, duplicate description is omitted. The embodiments of the present invention are particularly useful forms in which the present invention is implemented, and the present invention is not limited to the embodiments.

FIG. 1 is a perspective view showing a main part of a wire feeding device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along a bobbin axis of the wire feeding device of FIG. 1, and FIG.
FIG. 4 is a schematic view showing a wire feeding unit in which a plurality of the wire feeding devices of FIG. 1 are installed, and FIG. 5 is a cross-sectional view taken along a line III-III. FIG. 6 is a graph showing the relationship between the air pressure and the tension when each wire is fed by the two wire feeding devices. FIG. 6 shows two wires feeding devices at different positions installed in a conventional wire feeding unit. It is a graph which shows the relationship between the scale of the adjustment spring and tension when the wire is drawn out.

As shown in FIGS. 1 to 3, the wire feeding device of the present embodiment comprises a bobbin 1 on which a wire 11 is wound.
A bobbin shaft 13 fixed coaxially with the bobbin shaft 13;
A pair of pistons 14a and 14b opposed to each other so as to approach and separate from each other across the bobbin shaft 13 in the cross axis direction of
And a fluid chamber 15 in which pistons 14a and 14b are installed.
The compressor 16 includes a compressor 16 that supplies air to the fluid chambers 15a and 15b, and a regulator 17 that is provided on a fluid path from the compressor 16 to the fluid chambers 15a and 15b and that controls the amount of air supplied to the fluid chambers 15a and 15b. The fluid path extending from the regulator 17 branches into two fluid chambers 15.
a and 15b, whereby one regulator 17 is adjusted so that air pressure is evenly applied to each of the fluid chambers 15a and 15b.

The pistons 14a and 14b are slid by the pressure of the air supplied to the fluid chambers 15a and 15b, and the pistons 14a and 14b are pressed against the bobbin shaft 13 from both directions.

Thus, the piston 1 is attached to the bobbin shaft 13.
Rotational resistance according to the pressure contact force of 4a and 14b is given, and the wire 11 wound around the bobbin 12 is fed out in a state where tension according to this rotational resistance is applied.

The bobbin shaft 13 is made of iron and the piston 1
4a and 14b are made of polyester resin. However, the bobbin shaft 13 and the pistons 14a and 14b may be formed using a material other than iron or polyester resin.

In this embodiment, the piston 1
4a and 14b are provided in a pair, and are opposed to each other so as to be able to approach and separate from each other across the bobbin shaft 13 in the cross axis direction of the bobbin shaft 13. However, one or three or more may be provided. Therefore, one or three or more fluid chambers can be formed according to the number of pistons. Also,
Even when two pistons, that is, a pair of pistons, are provided, they need not be arranged to face each other as in the present embodiment.

In this embodiment, the fluid chamber 15
a and 15b are evenly applied with air pressure,
The same air pressure acts on each of the fluid chambers a and 14b. For example, the air pressure of one fluid chamber 15a is fixed and the air pressure of the other fluid chamber 15b is changed. Different air pressures can also be applied to 15a and 15b. This is the same even when three or more pistons are provided.

Further, in the present embodiment, the pistons 14a and 14b are slid by air, but may be slid using a gas other than air, or a liquid.
That is, in the present invention, the pistons 14a and 14b may be slid by the fluid.

In this embodiment, the wire 11 wound on the bobbin 12 is an electric wire having a rectangular cross section in the radial direction.
This is a so-called flat cable. However, in the present invention, the wire 11 is not limited to a conductor such as an electric wire, nor is it limited to a metal wire.
Further, the thickness and the length are not particularly limited, and include various members that can be wound around the bobbin 12, such as an elongated fiber member.

When an electric wire is used as the wire 11, not only a flat cable as in the present embodiment but also a so-called round electric wire having a circular cross section in the radial direction can be used.

As shown in FIG. 2, the bobbin shaft 13 is rotatably mounted on a piston casing 19 via a bearing 18. A bobbin pad between the piston casing 19 and the bobbin 12 of the bobbin shaft 13 urged in the direction of the bobbin 12 by a spring force and having a plate-like rubber 20 attached to an end surface of the bobbin 12. A stopper 22 having 21 is attached. Further, a clamper 24 having a clamp claw 23 having a through hole of the bobbin shaft 13 and being displaced in the cross axis direction of the bobbin 12 against the spring force is provided on an end surface of the bobbin 12 opposite to the stopper 22. I have.

When the bobbin 12 is inserted into the bobbin shaft 13 to such an extent that the bobbin pad 21 is displaced toward the piston casing 19 against the spring force, the clamp claws 23
Is a clamp groove 2 formed around the tip of the bobbin shaft 13.
5, one end surface of the bobbin 12 is pressed against the rubber plate 20, and the bobbin 12 is fixed to the bobbin shaft 13 and rotates with the rotation of the bobbin shaft 13.

As shown in FIG. 3, a tube 27 forming a fluid path is connected to a piston casing 19 made of, for example, a polyester resin via joints 26a and 26b which can be mounted with one touch. Also, piston 1
An O-ring 28 is attached to the outer peripheral surfaces of the 4a and 14b to prevent air leakage.

As shown in FIG. 4, the wire feeding unit provided with a plurality of such wire feeding devices has a total of 220 bobbins 12 (110 on one side × 2). Note that the number of bobbins 12 installed in the wire feeding unit is not limited to this, and a required number can be installed.

Here, the wire feeding unit is configured to simultaneously feed the wires 11 wound on the respective bobbins 12 of the wire feeding device described above.
By using this, for example, if a plurality of fed out wires 11 are placed in parallel with each other and sandwiched by a film and thermocompression-bonded, a flat collective wire called a so-called card cable can be obtained.

Such a wire feeding unit is provided with one compressor 16, and one regulator 17 is provided for a plurality of (for example, 20 to 30) wire feeding devices. Therefore, by operating one regulator 17, the pressure contact force of the pistons 14a and 14b on the bobbin shaft 13 in the plurality of wire feeding devices is adjusted.

It should be noted that a plurality of compressors 16 may be provided, and the regulator 1 for the wire feeding device may be provided.
The installation ratio of 7 can also be freely set from one to the desired number.

Next, the operation of the wire feeding device and the wire feeding unit of the present embodiment will be described.

The bobbin 12 on which the wire 11 is wound is attached to the bobbin shaft 13, and a regulator 17 is adjusted to supply a predetermined amount of air from the compressor 16 to the fluid chambers 15 a and 15 b to connect the pistons 14 a and 14 b to the bobbin shaft 13. Press. Then, the wire 11 is paid out at a predetermined take-up speed.

The bobbin shaft 13 has a piston 14
Rotational resistance according to the pressure contact force of a, 14b is given, and tension corresponding to this rotational resistance is given to the wire 11. Since the pistons 14a and 14b always apply a constant torque to the bobbin shaft 13,
A constant tension is always applied to the wire 11, so that the fluctuation of the tension applied to the wire 11 is suppressed. Thus, the wire 11 is prevented from being stretched due to excessive tension, and the wire 11 is not loosened due to the lack of tension, and the wire 11 can be smoothly fed.

The fluid chamber 15 is regulated by the regulator 17.
a, only by adjusting the air supply to 15b
Since the tension of the wire 11 can be adjusted, the tension of the wire 11 can be freely adjusted over a wide range from a very low tension to just before the occurrence of elongation. Thus, the wire 11 can be paid out with a low tension, so that the wire 11 having a small diameter can be stably fed.

Here, as shown in FIG. 6, in the case of the conventional wire feeding device, the tension cannot be measured on the scale of 0.5 to 3.5 due to the weight of the wire.
At the lowest tension, it was 280 g / mm ² . On the other hand, as shown in FIG. 5, in the wire feeding device of the present embodiment, the tension could not be measured at an air pressure of 0.5 to 1.0 kg / cm ² , but about 70 to 2 kg.
The tension of the wire 11 could be adjusted over a wide range up to 40 g / mm ² . This figure also shows that the wire 11 can be paid out with a low tension. In FIG. 6, when the scale is “6”, the tension is initially set to 400 g / mm ² and the measurement is performed. In FIG. 5, the maximum tension of the wire 11 is 2
Although it is 45 g / mm ² , it goes without saying that a higher tension can be applied to the wire 11 by increasing the air pressure.

As is clear from FIGS. 5 and 6, while the conventional wire feeding device has a large variation in wire tension among a plurality of devices (FIG. 6), the wire feeding device according to the present embodiment has a large variation in wire tension. The device has almost no such variation (FIG. 5). Therefore, in the wire feeding device of the present embodiment, it is possible to easily and evenly adjust the tension of the wire 11 among a plurality of devices simply by applying the same air pressure to the pistons 14a and 14b. Thereby, a plurality of wires 1
No bending occurs in the card cable manufactured by feeding out No. 1. In FIGS. 5 and 6, the wire feeder indicated by the solid line is located forward of the wire feeder indicated by the broken line in the feeding direction.

Further, the wire 1 is driven by the rotational resistance applied to the bobbin shaft 13 in accordance with the pressing force of the pistons 14a and 14b.
Since the tension is applied to 1, the guide pulley for applying tension to the wire 11 becomes unnecessary. This eliminates the work of hanging the wire 11 between the guide pulleys, and makes it possible to complete the preparation work in an extremely short time even when a wire feeding unit is configured using a plurality of such wire feeding devices. Become.

Further, the wire 1 is driven by the rotational resistance applied to the bobbin shaft 13 in accordance with the pressing force of the pistons 14a and 14b.
Since the tension is applied to the wire 1, no external mechanism such as a pulley arm or a brake mechanism using a brake band is required in addition to a guide pulley for applying tension to the wire 11, and the size of the wire feeding device is greatly reduced. It becomes possible. As a result, as shown in FIG. 4, the distance between the bobbins can be reduced, so that the device size of the wire feeding unit can also be significantly reduced.
Space efficiency can be improved.

When the air pressure supplied to a plurality of wire feeding devices is controlled by one regulator 17 as in the present embodiment, the tension of the wires 11 fed from the plurality of bobbins 12 is collectively controlled. It becomes possible to control.

In the wire feeding unit, one regulator 1 is attached to one specific wire feeding device.
If 7 is assigned, it is a matter of course that the tension of the wire 11 fed from the wire feeding device can be adjusted independently.

[0058]

As apparent from the above description, the following effects can be obtained according to the present invention.

(1) Since the piston always applies a brake to the bobbin shaft with a constant torque, a constant tension is always applied to the wire, so that the fluctuation of the tension applied to the wire can be suppressed. Will be possible. This can cause the wire to stretch due to excessive tension,
The wire does not loosen due to lack of tension, and the wire can be smoothly fed.

(2) Since the tension of the wire is adjusted only by adjusting the supply amount of the fluid to the fluid chamber by the regulator, the tension of the wire can be freely adjusted over a wide range, and the wire can be adjusted with a low tension. It is possible to pay out. Thereby, the feeding of the wire having a small diameter can be stably performed.

(3) Since there is almost no variation in wire tension among a plurality of wire feeding devices, simply applying the same fluid pressure to the piston can easily and evenly control the wire tension among the plurality of devices. It becomes possible to adjust.

(4) Since tension is applied to the wire by the rotational resistance applied to the bobbin shaft in accordance with the pressure contact force of the piston, a guide pulley for applying tension to the wire is not required. This eliminates the work of hanging the wire on the guide pulley, so even if a wire feeding unit is configured using a plurality of wire feeding devices,
The preparation work can be completed in a very short time.

(5) Since tension is applied to the wire by the rotational resistance applied to the bobbin shaft in accordance with the pressure contact force of the piston, an external mechanism for applying tension to the wire becomes unnecessary, and the size of the wire feeding device and the wire The size of the feeding unit can be made significantly compact. Thereby, the space efficiency can be improved.

(6) Since the supply fluid pressure to a plurality of wire feeding devices is controlled by one regulator, the tension of the wires fed from a plurality of bobbins can be controlled collectively. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a wire feeding device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along a bobbin axis of the wire feeding device of FIG. 1;

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a schematic view showing a wire feeding unit provided with a plurality of the wire feeding devices of FIG. 1;

5 is a graph showing the relationship between the air pressure and the tension when each wire is fed by two wire feeding devices installed at different positions in the wire feeding unit of FIG. 4;

FIG. 6 is a graph showing a relationship between a scale of an adjusting spring and tension when a wire is fed by two wire feeding devices at different positions provided in a conventional wire feeding unit.

FIG. 7 is a perspective view showing a main part of a conventional wire feeding device.

FIG. 8 is an explanatory view showing the operation principle of the wire feeding device of FIG. 7;

9 is a schematic diagram showing a wire feeding unit in which a plurality of the wire feeding devices of FIG. 7 are installed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Wire 12 Bobbin 13 Bobbin shaft 14a Piston 14b Piston 15a Fluid chamber 15b Fluid chamber 16 Compressor 17 Regulator 18 Bearing 19 Piston casing 20 Plate rubber 21 Bobbin pad 22 Stopper 23 Clamp claw 24 Clamper 25 Clamp groove 26a Joint 26b Joint 27 Tube 28 O-ring 101 Cam 102 Pulley arm 103 Guide pulley 104 Link 105 Adjusting spring 106 Brake pad 107 Brake pulley 108 Brake rod 109 Wire 110 Bobbin 111 Bobbin shaft 112 Guide pulley 113 Guide pulley

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3F109 BA01 CA04 CA06 CA08 CA09 3F111 AA01 AB01 BA05 BC07 BD05 3J058 AB39 BA67 CC04 CC78 CD05 CD27 FA39

Claims (7)

[Claims] A bobbin shaft on which a bobbin around which a wire is wound can be fixed coaxially; and a pressure of a fluid supplied to a fluid chamber presses against the bobbin shaft from a radial direction to rotate the bobbin shaft. And at least one piston that applies tension to the wire that is fed from the bobbin along with the rotation of the bobbin shaft, a compressor that supplies the fluid to the fluid chamber, and from the compressor to the fluid chamber. A regulator provided on a fluid path, the regulator adjusting a supply amount of the fluid to the fluid chamber. 2. A pair of said pistons are arranged so as to be mutually approachable and releasable with respect to each other across said bobbin axis in a direction intersecting said bobbin axis.
The wire feeding device as described in the above. 3. The wire feeding device according to claim 2, wherein the same fluid pressure acts on the pair of pistons. 4. The wire feeding device according to claim 1, wherein the fluid is air. 5. The wire feeding device according to claim 1, wherein the wire is an electric wire having a circular or rectangular cross section in a radial direction. 6. A plurality of wire feeding devices according to claim 1, wherein a plurality of the wire feeding devices are installed, and the wires wound on the bobbins of the plurality of wire feeding devices can be fed simultaneously. A wire feeding unit characterized in that: 7. The wire feeding unit according to claim 6, wherein the regulator is provided at a ratio of one to a plurality of the wire feeding devices.