JPH0262378A - Tension furnisher - Google Patents

Abstract

PURPOSE:To give the extent of constant tension to a long material at all times as well as to perform its working in optimum conditions by constituting a degree of torque requisite for rotation of a rotary plate of a magnetic torque controller so as to be smaller in proportion as a distance between an elastic pressure roller, pressing an outer circumferential surface of the long material rolled on a drum, and a turning shaft installed solidly with this drum becomes shorter. CONSTITUTION:When a long material 4a rolled on a drum 13 is drawn out, torque conformed to a pair of permanent magnets 9 requisite for rotating a rotary plate 8 of a magnetic torque controller 6 becomes smaller in proportion as a distance L between an elastic pressure roller 14, being attached to the tip of a rocking arm 17 of a rocker shaft 16 and pressing an outer circumferential surface of the long material 4a, and a turning shaft 5 installed as one body with the drum 13 becomes shorter according to an amount of the long material 4a. Consequently, according as thickness of the long material 4a rolled on the drum 13 becomes smaller, the torque requisite for rotating the turning shaft 5 is made smaller, therefore constant tension is always given to the long material 4a drawn out of the drum 13 attached to an uncoiler as a result.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of use in business a) The tension applying device according to the present invention can be applied to a magnetic tape, a thread,
It is attached to an uncoiler for sending out long materials such as various filaments from the drum, and is used to apply a constant tension to the long materials pulled out from the drum.

(Prior art) When processing various long materials, as shown in FIG. Winding the material 4b around a drum attached to the recoiler 3 is widely practiced.

In this way, when pulling out the unprocessed long material 4a from the drum attached to the uncoiler 1 toward the processing machine 2, the long material 4a
It is necessary to apply appropriate tension to a in order to properly process the long material 4a.

For this reason, conventionally, the tension applied to the elongated material 4a has been adjusted by adjusting the torque required to rotate the rotating shaft 5 provided in the uncoiler 1 for fixing the drum.

(Problem to be Solved by the Invention) However, in the past, the torque required for rotation of the rotating shaft 5 was simply adjusted, so that the tension applied to the long material 4a as the machining operation progressed. Change was inevitable.

That is, if the torque required for rotation of the rotating shaft 5 is the same, the tension applied to the long material 4a is greater than the tension applied to the long material 4a wound from the rotating shaft 5 to the drum because the thickness of the long material 4a wound around the drum is large. The larger the distance from the outer circumferential surface of the long material 4a wound around the drum, the smaller the thickness of the long material 4a wound around the drum. The smaller the distance, the larger it becomes.

As a result, the tension applied to the unprocessed long material 4a pulled out from the uncoiler 1 gradually increases as the processing operation progresses.

In this way, when the tension changes as the machining operation progresses, it is not always possible to apply the optimum tension, making it impossible to perform the machining operation in a satisfactory manner.

The tension applying device of the present invention eliminates the above-mentioned disadvantages.

(Means for Solving the Problems) The tension applying device of the present invention has a pressure roller pivotally supported at the tip of a swinging arm that swings around a swinging shaft, and a tension roller that is wound around a drum fixed to a rotating shaft. It is brought into contact with the outer peripheral surface of the shaku material.

In addition, a pair of annular permanent 61 stones are arranged parallel to each other with an interval between them, forming alternating S and N poles, and this one.
A rotary plate of a magnetic torque adjuster consisting of a rotary plate made of a magnetic material that is supported between a pair of permanent magnets and rotates, and at least one of the permanent magnets is rotatable about the rotation axis of the rotary plate. and the rotating shaft are rotatable in synchronization with each other.

Furthermore, wJt in the twisting direction of the swing shaft! is transmitted to a rotatable permanent magnet, so that the shorter the distance between the pressure roller and the rotating shaft, the smaller the torque required to rotate the rotary plate of the magnetic torque adjuster.

(Function) Using the tension applying device of the present invention configured as described above,
When applying a constant tension to a long material pulled out from a drum that is non-rotatably attached to a rotating shaft, the rotating shaft is rotatably supported by a rotation support device such as a bearing.

The torque required to rotate the rotating plate of the magnetic torque adjuster is:
If the thickness of the long material wound around the drum is large and the distance between the pressure roller and the rotating shaft is large, the problem will be large. When the distance between By pulling the material, the torque required to rotate the rotary shaft increases; on the other hand, when the thickness of the long material wound around the drum is small, the torque required to rotate the rotary shaft decreases.

Therefore, a constant tension is always applied to the long material pulled out from the drum attached to the uncoiler.

(Example) Next, the present invention will be explained in more detail while explaining the illustrated embodiment.

FIG. 1 is a schematic diagram showing an embodiment of the tension applying device of the present invention, FIG. 2 is an exploded perspective view showing the principle of a magnetic torque adjuster, and FIG. 3 is a sectional view thereof.

Before explaining the tension applying device of the present invention, first, a magnetic torque adjuster incorporated in this tension applying device will be explained.

As shown in FIGS. 2 and 3, the magnetic torque adjuster 6 has a rotating plate 8 made of a magnetic material fixed to the middle part of a rotating shaft 7, which is shaped like a donut and has S and N poles arranged alternately. Permanent magnet 9.10
A cylindrical spacer 11 is provided between both permanent magnets 9.10 to form a space 12 in which rotary plate 8 can freely rotate between both permanent magnets 9.10. One magnet 10 of both permanent magnets 9 and 10 is
．． The permanent magnets 9 and 10 are rotatable around the rotary glaze 7 so that the relative positions of the permanent magnets 9 and 10 can be changed, and the opposing poles of both permanent magnets 9 and 10 can be made the same or opposite.

In addition, when both permanent magnets 9 and 10 face each other with the same polarity,
Both permanent magnets 9 and 10 are covered with a case so that the distance between the permanent magnets 9 and 10 does not increase.

In such a magnetic torque adjuster 6, one permanent magnet 10 is rotated by a required angle, and both permanent magnets 9.1
0 with the same polarity facing each other, both permanent magnets 9.10
A strong magnetic flux is formed in the space 12 between them. Therefore, when trying to rotate the rotating shaft 7, the rotating plate 8 cuts this strong magnetic flux, and a large force acts to prevent the rotating shaft 7 from rotating. The torque required to do so increases. On the other hand, when both permanent magnets 9 and 10 are made to face each other with different polarities, the magnetic flux existing in the space 12 becomes weak, and the rotating shaft 7 can be rotated with a small torque. In order to change the relative position of both permanent magnets 9 and 10,
By adjusting the angle at which one of the permanent magnets 10 is rotated, the torque required to rotate the rotary shaft 7 can be continuously changed from the maximum value to the minimum value.

The tension applying device shown in FIG. 1 utilizes the magnetic torque adjuster 6 which can freely adjust the torque by rotating one of the permanent magnets 10 in this manner. This is to keep the tension of the elongated material 4a constant.

In FIG. 1, 14 is a pressure roller, and the base end of the pressure roller 14 is fixed and connected to one end of a swing shaft 16 which is rotatable in a torsional direction by a pair of bearings 15 and 15. However, it is pivotally supported at the tip of a swing arm 17 that swings about this swing shaft 16 . This pressure roller 14 is
A spring or gravity (not shown) presses the outer peripheral surface of the long material 4b wound around the drum 13, and the pressure roller 1
4 and the rotating shaft 5 that supported the drum 13 changes depending on the amount of the elongated material 4a wound around the drum 13, and the swing shaft 16 is displaced in the twisting direction in accordance with this change. There is.

A first gear 18 fixed to the middle part of the swing shaft 16 meshes with a second gear 19 formed in a circular ring shape, and this second gear 19 is further connected to the magnetic torque adjuster 6. It is fixed to the adjustment ring 20 of.

This adjustment ring 20 is for rotating the permanent magnet 10 built in the magnetic torque adjuster 6 and adjusting the torque of this adjuster 6, and is used to rotate the permanent magnet 10 built in the magnetic torque adjuster 6 and adjust the torque of the adjuster 6.
If the distance to ith5 is large, a pair of permanent magnets 9
．． 10 tend to face each other with the same polarity, the torque required to rotate the rotary plate 8 of the magnetic torque regulator 6 is increased,
On the other hand, when the distance between the pressure roller 14 and the rotating shaft 5 is small, the pair of permanent magnets 9 and 10 tend to face each other with different polarities, thereby reducing the torque required to rotate the rotating plate 8.

As mentioned above, the third gear 22 is attached to the rotating shaft 21 connected to the rotating plate 8 of the magnetic torque adjuster 6 whose torque is adjusted depending on the amount of the elongated material 4a wound around the drum 13.
is fixed, and this third gear 22 and a fourth gear 23 fixed to the intermediate part of the rotating shaft 5 are meshed with each other,
A rotating shaft 5 to which a drum 13 is fixed and a magnetic torque adjuster 6
The rotary plate 8 is arranged to rotate in synchronization with the rotary plate 8.

When pulling out the long material 4a wound around the drum 13 from the recoiler 3 equipped with the tension applying device of the present invention configured as described above, the rotation @5 with the drum 13 fixed is rotated against a support device (not shown). and supports it so that it can rotate freely with a constant torque.

As the rotating shaft 5 rotates, the rotating plate 8 of the magnetic torque adjuster 6 also rotates via the third and fourth gears 22 and 23. In order to rotate this rotating plate 8, a pair of permanent magnets 9 are required.
．． 10 is required, but since this torque is added to the rotational torque required to rotate the rotating shaft 5, the torque that actually rotates the rotating shaft 5 is originally the rotational torque of the rotating shaft 5. This is the rotational torque applied by the support section plus the torque consumed by the magnetic torque adjuster 6.

The torque required to rotate the rotary plate 8 of the magnetic torque adjuster 6 is, as described above, due to the large amount of the long material 4a wound around the drum 13, is large when the distance is large, and conversely, it is small when the amount of the long material 4a wound around the drum 13 is small and the distance between the pressure roller 14 and the rotating shaft 5 is small. When the thickness of the long material 4a wound around the drum 13 is large, the rotational torque T of the rotating shaft 5 becomes large, and on the other hand, when the thickness of the long material 4b wound around the drum 13 is small,
The rotational torque T of the rotating shaft 5 becomes smaller.

The tension F applied to the elongated material 4a pulled out from the drum 13 mounted on the uncoiler 1 is such that the rotational torque T is increased by the distance 11i from the center of the rotating shaft 5 to the outer peripheral surface of the elongated material 4a.
Since it is divided by L (F=T/L), if the length of the swinging arm 17 and the number of teeth of each gear 18, 19, 22, 23 are determined appropriately, the magnetic torque adjuster 6 can be adjusted. As the torque required to rotate the rotary plate 8 changes as described above, the long material 4 that is wound around the drum 13 attached to the uncoiler 1
The tension F applied to a can always be kept constant.

In order to rotate each part synchronously, gears are used in the illustrated embodiment, but instead of gears, a chain, a stepped belt, etc. may be used, or the rotating shaft 5.7 may be directly connected. You can also do that.

(Effects of the Invention) Since the tension applying device of the present invention is configured and operates as described above, even if the diameter of the long material wound around the drum changes as the processing operation progresses, the tension applying device of the present invention It is possible to always apply a constant tension to the length of the material, allowing for good processing of the length of the material.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an embodiment of the tension applying device of the present invention, Fig. 2 is an exploded perspective view showing the principle of the magnetic torque regulator, Fig. 3 is a sectional view thereof, and Fig. 4 is a tension applying device of the present invention. FIG. 2 is a schematic side view showing an example of a processing line that uses an application device. 1: Uncoiler, 2: Processing machine, 3; Recoiler, 4a, 4
b: Long material, 5; Rotating shaft, 6: Magnetic torque adjuster, 7
: Rotating shaft, 8: Rotating plate, 9.10: Permanent magnet, 11 Ni spacer, 12: Space, 13 Ni drum, 14: Pressure roller, 15: Bearing, 16: 1! Moving axis, 17: Swinging arm, 18:
First gear, 19: Second gear, 20: Adjustment ring, 2
1: Rotating shaft, 22: Third gear, 23: Fourth gear. Figure 1 Agent Kinzo Koyama (1 idiot) Figure 4 0L Figure Figure

Claims (1)

[Claims] (1) A tension applying device that applies a constant tension to a long material pulled out from a drum fixed to a rotating shaft, and a pressure roller pivotally supported at the tip of a swinging arm that swings around a swinging shaft. is brought into contact with the outer circumferential surface of the long material wound on the drum, and a pair of annular permanent magnets are arranged in parallel with each other with an interval between them and alternately form S and N poles. , a rotary plate made of magnetic material rotatably supported between the pair of permanent magnets, and a magnetic torque adjustment system in which at least one of the permanent magnets is rotatable about the rotation axis of the rotary plate. The rotating plate of the device and the rotating shaft are made to be rotatable in synchronization, and the movement of the swinging shaft in the twisting direction is freely transmitted to the rotatable permanent magnet. A tension applying device in which the shorter the distance, the smaller the torque required to rotate the rotating plate of the magnetic torque regulator.