JPS6038289B2 - Electromagnetic coupling device with reel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic coupling device used in a device for winding or unwinding a web such as a linear object or a belt-like object, and particularly for directly attaching a reel on which a tape is wound to the device. It's about structure.

For webs such as linear objects or strips, for example, narrow magnetic tape, use a wide tape coated with magnetic material to 1/2
It is produced by slitting a tape of a specified width such as inches,
The slitted tape is wound onto multiple reels fixed to a single rotating shaft at the same time with the optimum tension depending on the winding conditions, and the magnetic tape wound to a predetermined diameter is wound onto the reel. At the same time, it is removed from the rotating shaft and transferred to the next process.

By the way, the width of the above-mentioned magnetic tape is extremely small, so the reel diameter is limited, and the space cannot be secured, so the tension of the multiple magnetic tapes is limited to the single rotating shaft to which the multiple reels are fixed. In reality, a friction mechanism is provided between the rotating shaft and the roll, and the control is performed using mechanical frictional force.

This invention has been made in view of the above-mentioned circumstances, and a reel is removably attached to the outer periphery of the second connecting body of an electromagnetic continuous device, and a wire that is wound on the reel or unwound is An object of the present invention is to provide an electromagnetic coupling device with a reel that enables the tension of a web such as an object or a belt-like object to be constantly controlled to a desired value.

An embodiment of the present invention shown in FIGS. 1 and 2 will be described below.

In the figure, reference numeral 1 denotes one rotating shaft that is rotationally driven by a drive source such as an electric motor (not shown), la is a hanging rod formed along the outer periphery of the rotating shaft 1 along all directions of the axis, and 2 is a rotating shaft. 1 is a driving body which is iron-fixed by bolts (not shown), and has a plurality of magnetic pole claws 2a, 2b and a mole 2c arranged in an annular manner so as to constitute different poles alternately in the circumferential direction. 3 is an excitation coil wound around a bobbin 4 between the magnetic pole claws 2a, 2b of the drive body 2 and the yoke 2c, and 5 is a lead wire of the excitation coil 3, one end of which is led into the lotus groove la of the rotating shaft 1. It is led out to the outside through a bus bar 11 disposed in this lotus groove la and connected to a power supply device, and its end is grounded at an appropriate position of the drive body 2.

6 is a cylindrical driven body rotatably supported on the rotating shaft 1 via a bearing 7; 6a is a recess formed on the outer circumference of the driven body 6 at a predetermined distance apart in the circumferential direction;
8 is a hysteresis material fixed to the inner peripheral surface of the driven body 6 and faces the plurality of magnetic pole claws 2a, 2b with a predetermined gap therebetween; 9 is a cylindrical member press-fitted into the recess 6a of the driven body 6; 10 is a coil spring which is an elastic body inserted into the recess 6a, and 11 and 12 are spheres housed and held in the recess 6a via the coil spring 10, and are rotatable.

Reference numeral 13 denotes a ring-shaped reel that is inserted into the outer circumference of one of the spheres 11 and 12 and prevented from moving in the direction of the arrow by the other sphere 12, and is inserted into the outer circumference of the driven body 6. It is removably attached via the respective spheres 11 and 12 and the coil spring 10.

Incidentally, this reel 13 has a small inner diameter, for example, about 76 mm. As mentioned above, although the electromagnetic coupling device in this embodiment is a hysteresis clutch, this clutch is compact in size, with very small dimensions in the flea direction and scale direction, as can be seen from the inner diameter of the reel 13. As shown in the figure, a plurality of clutches (for example, two clutches) are arranged side by side on one rotating shaft 1, and the excitation coils 3 of these clutches are connected in parallel to a power supply device through one bus bar 11 arranged in a lotus groove la. There is.

Next, the operation of the device configured as described above will be explained.

First, when an excitation current is applied from the power supply to the excitation coil 3 of each clutch through the bus bar 11 and the doorway 5, the plurality of magnetic pole claws 2a and 2b of each drive body 2 are alternately supplied with N and S.
Different polarities occur, and an induced pole also occurs in the hysteresis material 8 of the driven body 6 that faces across the gap. At the same time, when the rotating shaft 1 is rotationally driven by the electric motor and the driving body 2 of each clutch is rotated at a predetermined speed, the magnetic pole pawl 2
Due to the magnetic attraction force generated between a, 2b and the hysteresis material 8, a constant rotational torque is transmitted to the driven body 6, and the driven body 6 rotates at a predetermined speed. Therefore, one sphere 11
The coil 13, which is held in position or fixed on the outer circumference of the driven body 6 by the coil spring 101, rotates with a constant rotational force, while the wide magnetic tape in the unwinding example is slit into small widths as described above. The tape W is wound onto each reel 101 via a feed roll (not shown). Here, as is well known, the hysteresis cracker has a so-called constant torque characteristic that shows a constant torque with respect to changes in the relative rotational speed between the driving body 2 and the driven body 6, and the transmitted torque is freely controlled by the excitation current. Therefore, even if the winding diameter gradually increases and the number of rotations of the reel 10, that is, the number of rotations of the driven body 6 decreases, the winding tension of the magnetic tape can always be controlled to a desired value. It is something that can be done. Now, to explain in detail the installation and removal work of the reels 13, first, each reel 13 is inserted into the outer periphery of the driven body 6 of each clutch arranged in parallel in the axial direction and sequentially moved in the direction of the arrow.

At this time, the spheres 11 and 12 in each clutch are pressed in the large diameter direction by the elastic force of the coil spring 10 and protrude from the outer circumference of the driven body 6 by a predetermined amount. The reel 13 is moved against the spheres 11, 12 and the coil spring 10', and one reel 13 is arranged for each clutch, and this reel 13 is attached to the outer periphery of one of the spheres 11 with its elasticity. The reel 13 is inserted against the force, and the end of the reel 13 in the direction of the arrow abuts and engages the other sphere 12. As a result, a relatively large elastic force of the coil spring 10 acts on the inner periphery of the IJ-rule 13 via one of the spheres 11, and the other sphere 12 protrudes under the elastic force of the coil spring 10. Movement of the reel 13 in the direction of the arrow is prevented, and therefore the reel 13 is firmly held in that state. Moreover, since the elastic force based on the spheres 11, 12 and the coil spring 101 against the inner periphery of the reel 13 is set to be sufficiently larger than the rotational torque necessary to wind up the tape W, the reel 13 and the driven 6, there will be no slippage in the rotational direction or in any axial direction. This can be further improved by increasing the number of locations where the spheres 11 and 12 and the coil spring 10 are installed. In this embodiment, they are installed at four locations. on the other hand,
If the tape W is wound up to a predetermined length on each reel 13,
Each reel 13 must be removed from the driven body 6 and transferred to the next process.

That is, when each reel 13 is removed, the spheres 11 and 12 and the coil spring 10 acting on the inner periphery and end portion of the reel 13 are removed.
Removal can be accomplished by pressing each reel 13 in the direction of the arrow (or in the opposite direction) with a force greater than the elastic force of . It is also possible to use a press or the like as a means to obtain the force to press the reel 13 during this attachment and detachment, and to attach and detach with an automatic machine or the like. Furthermore, since the spheres 11 and 12 are spherical and rotatable, the reel 13 can be moved very smoothly, and the work is very easy.

Furthermore, since a recess 6a for storing and holding the spheres 11, 12 and the coil spring 10 is formed in the driven body 6 of the clutch, a general-purpose reel 13 can be used without any modification, and the reel 13 can be Since the other sphere 12 can block the movement toward the rear, the reel 13 and the driven body 6
The relative transmission in the circumferential direction can be made arbitrarily and is excellent in terms of flexibility.

Incidentally, although the spheres are arranged in parallel in the mouse direction in the above example, it is also possible to prevent movement in the rotational direction and the mouse direction and hold the position using a single sphere.

Further, in the above-mentioned device, if a circumferential groove that engages with the sphere is formed in the inner peripheral portion of the reel 13, the effect will be significant. Further, in the embodiment, a hysteresis clutch is used as an example, but the present invention is not limited to this, and it goes without saying that similar effects can be obtained by using a slippery clutch such as a Bauder clutch that can control torque. As described above, the present invention provides an electromagnetic coupling device having a first coupling body and a second coupling body connectable to this coupling body, in which a recess is formed in the outer peripheral part of the second coupling body; A sphere is housed and held in the recess via an elastic body, and the material to be wound is wound or unwound via the elastic body and the sphere.
Since it is configured to be removably attached to the main body of the connection,
With a simple configuration, the reel can be rotated in the direction of rotation of the second connecting body,
The shaft can be securely fixed in both directions, and multiple reels can be mounted and removed simultaneously by pushing or pulling out the rotating shaft or reel in all directions against the elastic force of the elastic body. Furthermore, the relative positions of the reel and the second connecting body in the circumferential direction can be set arbitrarily, and there can be advantages such as no need for a special positioning jig.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing an embodiment of the present invention, and FIG. 2 is a front view of the reel 13. In the figure, 1 is a rotating shaft, 2 is a driving body, 2a and 2b are magnetic pole claws, 3 is an exciting coil, 6 is a driven body, 6a is a concave groove,
8 is a hysteresis material, 9 is a bush, 10 is a coil spring, 11 and 12 are spheres, and 13 is a reel. Figure 2 Figure 1

Claims (1)

[Claims] 1 a first connecting body having a first connecting surface; a first connecting body rotatably supported on the connecting body, facing the first connecting surface with a gap therebetween, and being connectable with the first connecting surface; 2
a second connecting body having a connecting surface, an excitation coil capable of controlling the connected state of the first and second connecting bodies, a recess formed on the outer periphery of the second connecting body, and an elastic member in the recess. A spherical body is housed and held through the body, and a web take-up or unwinding reel is held in position on the outer periphery of the second connecting body through the spherical body that resists the elastic body, and is detachable. An electromagnetic coupling device with a reel, characterized in that it can be attached.