JP2510961Y2 - Direct drive roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a direct drive roll for winding a synthetic resin film or a tape such as paper, cloth or metal foil at the time of completion of processing.

[Conventional technology]

Conventionally, although not shown as a device for feeding a tape such as a synthetic resin film which has been fed out to perform a process such as calendering, or after the roll main body for feeding or winding the tape is pivotally supported on a rotary shaft, The rotary shaft is configured to be rotated by driving a motor via a power transmission mechanism such as a belt.

[Problems to be solved by the device]

In each of the conventional devices for feeding and winding tape and the like, the roll main body is rotated integrally with the rotary shaft by the driving force of a motor or the like. Therefore, when an unexpected tension is applied to the tape, the roll main body is rotated by the drive source through the power transmission mechanism at the rated torque, making it impossible to absorb the tape tension. There was a problem that it was damaged or cut.

The present invention has been made to solve the above-mentioned problems, and the purpose thereof is to generate a rotating magnetic field in the circumferential direction in the roll main body, and to generate a rotating torque by the rotating magnetic field so that the roll main body is voluntarily operated. By rotating it to
It is an object of the present invention to provide a direct drive roll that easily absorbs fluctuations in torque and facilitates a safe winding operation without damaging or cutting the tape.

[Means for solving the problem]

In order to achieve the above-mentioned object, the present invention provides, on a fixed shaft, an induction type electric base body in which a coil which is a source of a rotating magnetic field is wound around a core whose outer diameter is formed into a perfect circle. The roll body is assembled and rotatably arranged on the fixed shaft via bearings so as to maintain a narrow gap between the roll main body and the induction variable base, and the roll main body has a rotating magnetic field generated by the induction variable base. It is characterized in that the induction rotation is performed.

According to a second aspect of the present invention, the roll main body and the inductive variable base paired with the roll main body are composed of one set each as a singular body.

According to a third aspect of the present invention, the roll main body and the inductive fluctuation base paired with the roll main body are composed of a plurality of independent sets.

[Action]

In any of the claims, when the direct drive roll is placed during the tape processing step to excite the induction type electric base body, the same principle as the electric motor (the fundamental principle of the induction motor based on the Arago disk) is used. Since a rotating magnetic field is generated on the circumferential surface of the roll body and a driving torque is generated in the moving direction of the magnetic field, the roll body is guided by the induction type electric base body in the direction of the rotating magnetic field to rotate. This allows the tape to be wound.

〔Example〕

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

FIG. 1 shows a cross section of a first embodiment of the present invention. The direct drive roll according to the first embodiment is configured such that the tape after the completion of the processing such as calendering is wound in a batch in a wide state in the original state.

First, the structure will be described. In the fixed shaft 1 which is the base of the direct drive roll, an L-shaped portion whose tip is exposed on the shaft circumferential surface at this intermediate position at the shaft center at the near intermediate position from this one end to this one side. The lead wire lead-out hole 2 is formed. A key groove is formed on the peripheral surface of the intermediate shaft of the fixed shaft 1,
The key 3 is fixedly inserted in this groove.

An induction type electric base A shown below is fixed to the shaft of the fixed shaft 1 on which the key 3 is located. In this induction type electric substrate A, a coil 5 having a length in the axial direction which is a source of a rotating magnetic field is wound around each pole of a core 4 made of a laminated body of ferromagnetic materials having an outer diameter formed into a perfect circle. Then, the induction type electric base A is obtained.

Therefore, when the induction type electric base A is excited, a rotating magnetic field is applied to the peripheral surface of the roll main body 12 which will be described later and which is concentrically arranged at the circumferential position of the induction type electric base A according to the same principle as the induction motor. The drive torque is generated in the rotating direction of the magnetic field.

This induction type electric base A is fitted with the key holders 6 and 7 of a tubular body in close contact with the key 3 of the fixed shaft 1 supporting the base A from the front and rear direction, and then the key holder 6 and 7,
It is integrated with the fixed shaft 1 by fitting the snap ring 8. In this way, the fixed shaft 1 and the induction type electric base A are assembled together in such a manner that the fixed presser 6, 7 serves as an integrated fixed portion B.

Support rings 9 and 10 are concentrically fitted and arranged on the outer fixed shaft 1 near the two key pressers 6 and 7 by fitting bearings 11 and 11. Between the support rings 9 and 10, each end of a cylindrical roll body 12 having a proper gap 15 at the inner peripheral position with respect to the core 4 of the induction type electric base A is fitted. The roll body 12 is formed of a material of a good conductor (including a ferromagnetic material such as an iron plate in addition to aluminum and copper). Therefore, when the induction type electric base A is excited, a rotating magnetic field is generated on the peripheral surface of the roll body 12, and a driving torque is generated in the rotating direction of the magnetic field. It is configured to rotate while being guided in the direction of the rotating magnetic field by A.

The operation of the direct drive roll in the first embodiment will be described.

The direct drive roll of the above aspect is a roll main body.
A winding tube B such as a paper tube is fitted on the peripheral surface of 12 and the first end of the tape C is locked to the winding tube B at the time of completion of processing to excite the induction type electric substrate A. According to the principle described above, a rotating magnetic field corresponding to each pole position is generated on the circumferential surface of the roll main body 12, and a driving torque is generated in the rotating direction of this magnetic field.
It is possible to rotate while being guided in the winding direction. When feeding, rotate it in the reverse direction.

Since the drive torque is applied to the roll main body 12 in this way, if the torque changes in the roll main body 12 and the tension increases, the tape is not restricted by the rotational torque generated by the induction type electric base A. Since the tape C rotates following the fluctuation in tension and the reaction force does not act on the tape C, it is possible to eliminate scandals such as damage and cutting of the tape which is wound up when the processing is completed. On the contrary, when the tape C is slackened, the roll body 12 receives the rotational force from the induction type base,
Prevents tape C from sagging. The lead wire 5a of the coil 5 is drawn out from the lead drawing hole 2.

FIG. 2 shows a second embodiment, in which one side of the fixed shaft 1 is
The core 4 is fixed by the key 3 and the coil 5 is wound around the core 4. The core 4 faces one end of the roll body 12 with a narrow gap. Roll body facing the core 4
One end of 12 is further extended from one support ring 9. The lead wire 5a of the coil 5 is drawn out as it is. Others are the same as those in the first embodiment.

FIG. 3 is a sectional view showing the main part of a direct drive roll according to the third embodiment of the present invention. The direct drive roll in the third embodiment is one in which, for example, narrow tapes individually divided during a processing step are dispersed and wound on individual roll bodies.

First, the structure will be described. On the peripheral surface of the intermediate shaft of the fixed shaft 1 which is the base of the direct drive roll, a key groove similar to that of the above-mentioned embodiment is formed, and this groove key 3 is fixedly inserted. On the shaft portion of the fixed shaft 1 on which the key 3 is located, the induction type electric base A composed as a unit by winding the coil 5 around the core 4 is provided on the key presser 6 as in the above embodiment.
(And a key holder 7 on the opposite side (not shown)), a snap ring 8 and the like intervene to be attached as an integrated fixing portion B. The stator-side your 4 is a continuous integral type without being independent for each of a plurality of winding hubs 19 described later,
The coil 5 is also wound so that a predetermined number of poles is formed regardless of the number of winding hubs 19.

Next, on the outer peripheral surface of the core 4, which is a main part of the induction type electric base A, a fixing ring 16 having a vertical peripheral cross-section formed in a convex shape is fitted by a predetermined interval arrangement. There is. A good conductor (aluminum, copper, iron plate, silicon steel plate, etc.) is provided at the outer peripheral position of the core 4 between the fixing rings 16.
The divided roll body 18 formed by forming a vertical cross section of the ring body into a V shape by fitting each one side of the bearing 17 in the recesses on the left and right, and then each other side of the bearing 17, Further, the fixing ring 16 is rotatably fitted and arranged in such a manner that the fixing ring 16 is fitted into the outer peripheral cutout at each position.

When the induction type electric substrate A is excited as described above, a rotating magnetic field is generated on the inner peripheral surface of each roll body 18, and a driving torque is generated in the rotating direction of this magnetic field.
Are configured to rotate while being individually guided in the direction of the rotating magnetic field by the induction type electric substrate A. On the outer diameter surface of each roll body 18, a winding hub 19 made of non-magnetic material (for example, synthetic resin) for winding a narrow magnetic tape cut into individual individual product widths during processing is provided at each position. It is removably fitted to the roll body 18 in such a manner that it can rotate integrally with the roll body 18, and is configured as a whole direct drive roll.

The operation of the direct drive roll according to the third embodiment, which is formed into a bundle by the above, will be described.

When the direct drive roll of the above-described embodiment locks the first ends of the narrow tapes cut into individual product widths on the winding hub 19 at each position to excite the induction type electric base A, the induction motor is driven. On the inner peripheral surface of the roll main body 18, a rotating magnetic field corresponding to each ball position is generated, and drive torque is generated in the moving direction of this magnetic field. It is possible to rotate while being guided in the winding direction of the tape. In other words, since the drive torque is applied to each roll body 18 without being restricted by the rotating magnetic field and the relief force acts, even if the roll body 18 fluctuates in torque, the reaction force acts on the tape. Therefore, it is possible to smoothly and easily wind the narrow tape D, which is cut into each individual product width, around each winding hub 19. It can also be applied as it is when the tape is fed from the roll body 18.

As shown by the chain double-dashed line in FIG. 3, the core 4 is provided independently on the fixed shaft 1 in correspondence with each roll body 18, and the coil 5 is wound around each core 4. You can also wear it. Further, it is also possible to attach a good conductive plate 18a to the surface of the roll body 18 facing the core 4 and form the other part of the roll body 18 with various materials such as synthetic resin. As the good conductive material 18a, iron or copper can be applied, and other good conductive materials can be used.

FIGS. 4 and 5 show a fourth embodiment, and as shown in FIG. 4, fixed shafts 21 and 22 having the same outer diameter but different shapes and lengths are laterally concentric in the left and right positions. According to the shape, they are arranged at intervals. In this case, an air supply path 23 having a slightly larger diameter is provided through the shaft center of one fixed shaft 21. Further, a small-diameter air discharge portion 24 is provided through the axis center of the other fixed shaft 22. Stop rings 25 and 26 of the same form are fixedly provided on the inner peripheral ends of the inner shafts of both the fixed shafts 21 and 22, respectively. Both ends of the inner cylinder 27 are fitted to the both stop rings 25 and 26. Due to the fitting of the inner cylinder 27, a large chamber 28 having both ends closed by the retaining rings 25, 26 is formed between the retaining rings 25, 26. In the inner cylinder 27,
A plurality of air ejection holes 29 are provided at intervals.

On the intermediate shafts of the fixed shafts 21 and 22 adjacent to the stop rings 25 and 26, the non-magnetic holding rings 30 and 31 are provided.
Is fixed. In this case, the presser rings 30, 31 are fixed. In this case, ring-shaped magnets 37, 38 are concentrically attached to the respective end faces of the presser rings 30, 31.

Next, an intermediate chamber 41 is provided on the shaft center side on the shaft of the fixed shaft 21 between the one stop ring 25 and the pressing ring 30 as described above, and a ring-shaped small chamber 42 is provided inside the shaft periphery. Fixing member with a long axial mating die
32 are fitted in such a manner that they together form a unitary body. The small and medium chambers 41, 42 of the fixing member 32 are in communication with the ventilation holes 43 discharged from the air supply path 23 at the axial center position. Further, a single short fixing member 33 is fitted on the shaft of the fixed shaft 22, which is located between the other stop ring 26 and the pressing ring 31.

Support rings 34, 35 formed in a ring shape are provided on the outer diameter portions of the fixing members 32, 33 on the respective sides corresponding to the positions of the pressing rings 30, 31, and the outer diameter portions on the respective sides. And the pressing rings 30 and 31 are rotatably fitted and arranged on the disc surfaces at appropriate intervals.

Between the support rings 34, 35, a cylindrical roll body having an appropriate ventilation gap 46 for the inner cylinder 27 at the inner peripheral position.
Each end of 36 is fitted. The roll body 36 is formed of a material of a good conductor (aluminum, copper, iron plate, etc.). In this case, ring-shaped magnets 39, 40 facing the magnets 37, 38 with the same polarity are attached to the end faces of the support rings 34, 35.

In the roll of the above aspect, in the small chamber 42 of the fixing member 32 fitted to the one fixed shaft 21, as shown in FIG. 4 and FIG. Are concentrically fitted and arranged. A coil 45 is fitted on each pole of the electromagnetic core 44. Therefore, when the coil 45 is excited, a rotating magnetic field is generated on the peripheral surface of the roll main body 36 by the same principle as that of the AC induction type laminated wattmeter, and a driving torque is generated in the direction in which the field moves. The roll body 36 is configured so as to rotate while being guided in the direction of the rotating magnetic field by the electromagnetic core,
It is composed into a direct drive type air floating roll as a whole. The lead wire of the coil 45 is pulled out through the air supply 23.

The operation of the air floating roll formed into a batch will be described.

First, when air is supplied from the compressor or the like into the large chamber 28 via the air supply path 23, the large chamber 28
The air in 28 is ejected from the air ejection holes 29 to the ventilation gap 46 between the inner cylinder 27 and the roll body 36, and the roll body 36
Can be freely rotated without contacting the inner cylinder 27. In this case, one of the air between the inner cylinder 27 and the roll main body 36 is the ventilation gap 46 between the fixing member 32 and the support ring 34, and this support ring.
It is discharged to the outside on one side through a ventilation gap 46 between the pressing ring 30 and the pressing ring 30.

The other of the above-mentioned air is a ventilation gap 46 between the fixing member 33 and the support ring 35, and the support ring 35 and the pressing ring 31.
It will be released to the outside of the other through the ventilation gap 46 between the other. Therefore, the roll body 36 and the support rings 34 and 35 are
It can float so as to be freely rotatable without contacting any of the above-mentioned peripheral members.

When the roll of the above embodiment guides the conveyance of a continuous sheet to be a magnetic tape, or when winding or unwinding from a rolled state, when the coil 45 is excited, the position of each coil 45 The magnetic flux generated from the ball passes through the peripheral surface of the roll main body 36 located at the outer circumference of each pole at each position and flows to the ball side of the adjacent different pole. Therefore, a rotating magnetic field is generated on the circumferential surface of the roll body 36 at each pole position, and a driving torque is generated in the moving direction of the magnetic field, so that the roll body 36 is set in the same direction as the continuous sheet conveying direction. While being guided in the direction of the rotating magnetic field by the generated magnetic core 44, the magnetic core 44 can rotate in a comfortable state. In this way, the roll body 36 is given a drive torque having no gravitational force as in the above-described embodiments, so that the roll body 36
Even if the torque of 36 fluctuates, its reaction force does not act on the continuous sheet. Therefore, for example, if the tension of the continuous sheet fluctuates, the roll main body 36 will have an electromagnetic coil 45.
Even if the continuous sheet is rotated by the excitation, it can be rotated according to the fluctuation of the tension of the continuous sheet, and the safety of the continuous sheet at the time of conveyance can be easily and surely ensured.

In the above embodiment, the electromagnetic core 44 and the coil 45
However, the present invention is not limited to the above-mentioned embodiment, and for example, the electromagnetic core 44
After the core 45 and the core 45 are fitted on the outer shaft of the fixed shaft 21 adjacent to the one pressing ring 30, one side of the roll main body 36 is extended to the position of the electromagnetic core 44 and the coil 45 at the outer position. The heat dissipation effect of this electromagnetic core 44 can be further enhanced.

The number of poles of the electromagnetic core 44 and the coil 45 is 3 in the figure.
It is not limited to the pole, and can be freely selected. In addition to the good conductor, the roll main body 36 can be rotated by torque due to system cis loss by using iron, chrome steel, or cobalt steel ferromagnetic material, or by attaching the ferromagnetic material on the good conductor,
It is also possible to rotate by utilizing the torque due to the eddy current loss and the systemesis loss.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

As in the conventional method, bearing friction, friction brake, clutch, magnetic friction, etc. are used, and the friction part is inserted between the material to be wound and the drive shaft to generate an appropriate slip. In the case where the slack and the tension are prevented from being excessive, all of them are controlled by a motor through a power transmission mechanism such as a belt or a gear, and therefore, vibration of the belt and gear Precision winding and feeding could not be performed due to mechanical loss due to backlash, distance of power transmission system, etc., but in the present invention, the rotating magnetic field is applied to the roll body in a non-contact manner with the winding torque and the feeding torque. Therefore, such a conventional problem can be solved. Further, a slip, that is, a friction depending on the winding torque can be utilized between the induction type base body and the roll main body, and ideal control of feeding and winding can be expected. Further, since the fixed shaft is used, there is no eccentric rotation that occurs in the rotary shaft, and the winding and feeding are more stable.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a direct drive roll according to a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view showing a direct drive roll according to a second embodiment, and FIG. 3 is a third embodiment. FIG. 4 is a longitudinal sectional view of an essential part shown in FIG. 4, FIG. 4 is a longitudinal sectional view of an essential part showing a fourth embodiment, and FIG. 5 is a sectional view taken along line II-II of FIG. 1,21,22 …… Fixed shaft 4,44 …… Core 5,45 …… Coil 11,17 …… Bearing 12,18,36 …… Roll body 16 …… Fixed ring A …… Induction type electric base, B ……Fixed part

Claims (3)

(57) [Scope of utility model registration request] 1. An induction type electric base body having a coil having an outer diameter formed into a perfect circle and a coil which is a source of a rotating magnetic field wound around the core, and the fixed shaft is assembled to the fixed shaft. A direct drive characterized in that the main body is rotatably arranged with respect to the induction type electric base body while maintaining a narrow gap therebetween, and the roll main body is induced to rotate by a rotating magnetic field generated by the induction type electric base body. roll. 2. The direct drive roll according to claim 1, wherein the roll main body and the induction type electric base paired with the roll main body are each composed of one set as a singular body. 3. The direct drive roll according to claim 1, wherein the roll main body and the induction type electric base paired with the roll main body are formed of a plurality of independent pairs.