JPS602124Y2 - Winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winding device, and more particularly to a winding device for winding a thin wire or film-like member into a polygonal shape.

Now, for example, a small capacitor is constructed from a laminate of very thin metal foil and insulating material.

In this case, generally, a long film of metal foil and insulator is wound up using a circular take-up frame with a relatively large diameter, and after the rolled up circular laminate is provided with metal to serve as an electrode, the circumferential A method has been adopted in which the capacitors are cut in different directions and formed into multiple laminates (capacitors).

However, since each laminate formed by this method has an arc shape, shaping is required when assembling it into a capacitor, which is not preferable in terms of process simplification.

To solve this problem, the film-like material is wound into a shape that can be formed only from the straight parts, for example, an oval shape with an extremely small arcuate radius, or a polygonal shape such as a triangle or quadrilateral, and the straight part is It is advantageous to use the method of molding into a large number of pieces.

In addition, in such a capacitor laminate, it is necessary to wind up the film-like material while maintaining a constant tension in order to obtain uniform characteristics as a capacitor.

In recent years, not only the above example of capacitors but also other fields, linear or sheet-shaped members made of various materials such as paper, metal, synthetic resin, etc. are being held at a constant tension for a long time for various purposes. A process of winding the material into a circular or polygonal shape is required, and there is a strong demand for a winding device for this purpose.

The present invention was made in response to such a demand, and its purpose is to provide a novel winding device as described above.

The winding device according to the present invention includes a protruding mechanism for continuously protruding a member to be wound while applying tension thereto, and a winding mechanism for winding the member to be wound by rotating a polygonal winding reel at a constant angular velocity. A take-up mechanism, and a protrusion amount adjustment mechanism that adjusts the amount of protrusion of the member to be wound from the protrusion mechanism in order to maintain a constant tension on the member to be wound, and the protrusion amount adjustment mechanism a movable roller that swings the polygonal take-up reel vertically in a direction perpendicular to its protrusion direction, and an action in which each side of the polygonal take-up reel is periodically formed into the same shape at an angle equal to the central angle it occupies with respect to its rotation center. A cam having a surface on the periphery is provided, the cam is rotated synchronously at the same angular velocity as the rotational angular velocity of the winding reel, and the movable roller is moved up and down by the action surface of the cam, thereby increasing the amount of protrusion of the member to be wound. is configured to be adjusted in accordance with fluctuations in the winding amount of the winding reel.

In addition, in the present invention, 'polygon' refers not only to ordinary shapes such as triangles and quadrilaterals, but also to extremely long shapes that are considered to be essentially composed of two straight parts because the radius of the circular arc is extremely small. It is defined to include shapes such as circular shapes.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 schematically show different embodiments of a winding device according to the invention.

These examples are examples of devices for winding the film 10, which is a member to be wound, into an extremely oval shape, a regular triangle shape, and a regular square shape, respectively.

Referring to FIG. 1, the winding device is provided with a film ejecting mechanism 11 and a film winding mechanism 12.

In the example shown in FIG. 1, the protruding mechanism 11 is the film drum 13.
The drum 13 continuously rotates about a shaft 14, for example, in the direction of the arrow.

As a result, the film 1 wound around the drum 13
0 is fixed and continuously pushed out via the idle roller 15.

The take-up mechanism 12 is provided with a take-up reel 16, and this reel 16 is rotated about a rotating shaft 17 at a constant angular velocity.

The examples shown in FIGS. 1 to 3 differ only in the shape of the take-up reel.

That is, whereas the reel 16 shown in FIG. 1 has a structure in which a winding shaft 18 is provided at both ends of a linear member that rotates around a rotating shaft 17,
Figure 2.

The reels 19 and 20 in FIG. 3 are equilateral triangles and equilateral squares, respectively.

In the case of FIG. 1, the film 10 is wound up into an elliptical shape with the winding shaft 18 as an arcuate part, but the winding shaft 18
If the diameter of 8 is made extremely small, the film 10 can be wound into a shape that essentially consists of two straight sections.

Therefore, in the present invention, the linear reel 16 shown in FIG. 1 will also be treated as a special polygonal reel.

Next, the winding device according to the present invention includes a mechanism 11 for pushing out the film 10 in order to maintain the film 10 at a constant tension.
A protrusion amount adjustment mechanism is provided to adjust the amount of protrusion from the base, and this mechanism will be explained in detail later.

Here, with reference to FIGS. 1 to 3, the relationship between the amount of protrusion of the film 10 and the amount of winding by the reel when the film 10 is wound into a polygonal shape will be considered.

In addition, in these figures, the winding amount of film 10 and each reel, 16, 19, 20, AlA2. BIB2. Cl
The reference state in which C2 and C2 are respectively straight lines is shown.

Also, the length of the glue 16 in Figure 1 is long, and the length of the glue in Figures 2 and 3 is
The length of one side of the reel 19 and 20 in the figure is a, and the distance between the guide roller 15 and the reel rotating shaft 17 is L.

Now, in FIG. 1, the distance 1° between the guide roller 15 and the apex A1 of the reel 16 is the minimum amount of protrusion of the film 10, and the distance l between the guide roller 15 and the apex A2 of the reel 16.

Jugen is the maximum amount of protrusion. Therefore, the difference between the two is the winding amount when the reel 16 rotates 180 degrees.

Next, in FIGS. 2 and 3, the minimum amount of protrusion is 1°, the maximum amount of protrusion is 1□0a, and the difference a between the two is the reel 1
9 and 20 are the winding amounts when rotated by 02-〇□ from the reference position, respectively.

However, each reel 16, 19, 20 rotates and each vertex A
1. B1. C□ is A3. B3. C, the amount of protrusion l is 1 = (L-rcos6) 2+ (rsinθ
) becomes 2.

However, θ is the rotation angle of the reel, and in the case of Fig. 1, O≦θ≦
180 degrees, in Figure 2 θ□≦θ≦02 (=01+12
In Fig. 3, θ1≦θ≦02 (=θ, +90)
It is a degree value.

As is clear from this formula, in the range of θ=0 to 18# or 01 to θ2, the amount of protrusion Δ11Δθ of the film 10 per unit rotation angle is not constant, so the horizontal axis represents the rotation angle θ, and the vertical axis If the amount of protrusion 1 is taken and graphed, it will look like a curve 11 shown in FIG.

Therefore, in order to wind up the film 10 while always maintaining a constant tension, it is necessary to extend the film 10 so that the amount 1 of the film 10 extends from the extension mechanism is the same as the curve 11.

For this reason, the winding device of the present invention is provided with a protrusion amount adjustment mechanism.

As the protrusion amount adjustment mechanism, various mechanisms can be considered by applying conventional known techniques.

First, when the rotary drum 13 is used as the protrusion mechanism as in the example shown in Fig. 1, the first method is to indirectly control the amount of film protrusion by controlling the rotational speed of the drum. It will be done.

For this purpose, the rotation speed of the drive mechanism of the drum 13, such as a motor, may be controlled in relation to the rotation angle of the reel.

While heating, such speed control is complex and generally undesirable.

Therefore, the rotational speed of the motor may be kept constant and the rotational angular speed of the drum may be controlled using an electromagnetic clutch.

As is well known, the electromagnetic clutch has the characteristic that there is no mechanical contact between the input shaft and the output shaft, and that it can transmit a constant torque that is approximately proportional to the excitation current, regardless of the slip rotation speed of the two.

Therefore, although not shown, if the rotating shaft of the drum 13 and the motor are connected via an electromagnetic clutch and the excitation current of the electromagnetic clutch is set so that the film tension becomes a predetermined value, the film 13 is pulled out by the reel to have the same amount of protrusion as the curve 11 shown in FIG. 4, and the film 10 is held at a constant tension.

However, with the control mechanism using an electromagnetic clutch, good results can be obtained when the tension is high and the winding speed is low, but when the tension is low and the winding speed is low, the drum is affected by its own inertia, etc. It may not be possible to accurately follow the speed fluctuations required for this, and there is a risk that the same amount of protrusion as curve 11 in FIG. 4 may not be obtained.

In addition, in any of the above cases, it is effective only when the protruding mechanism is a rotary drum, and the range of application is narrow.

Next, as a second method, a method can be considered in which the rotational speed of the drum 13 is kept constant and the actual amount of protrusion is directly adjusted.

When the rotational angular velocity of the drum is constant, the amount of film protrusion Δl/Δθ per unit rotational angle is constant, so the amount of protrusion l is determined by the straight line 1. in FIG. becomes.

In this case, as is clear from the figure, there is a difference between the amount of protrusion 11 necessary to keep the film tension constant, and in the portion (Sl), the amount of protrusion becomes excessive and the tension decreases. In the portion (S2), the tension is insufficient and the tension becomes excessive.

Therefore, it is necessary to shorten and compensate for the excess and shortage of the protrusion amount 1b, respectively, in relation to the reel rotation angle θ.

For this purpose, a protrusion amount adjustment mechanism 30 as schematically illustrated in FIG. 5 may be used.

The protrusion amount adjustment mechanism 30 includes a pair of guide rollers 31 and 3 fixed at an appropriate interval on the film running path.
2, and a movable roller 33 provided in relation to both rollers 31 and 32.

The movable roller 33 is movable vertically at right angles to a straight line connecting the guide rollers 31 and 32.

Assuming that the distance between the movable roller 33 and both guide rollers 31 and 32 is the same length 11, the amount of protrusion of the film 10 is J.
□It can be regarded as +1.

Therefore, in the case of FIG. 5, if 211 is constant, it will be 1''lb, but if 211 is varied in a predetermined manner, it can be set to 1=11.

The amount of variation in □□ is determined by driving the movable roller 33 by cams 34, 35, 36 as shown in FIGS. 6 to 8.

In the case of the reel 16 shown in FIGS. 1 and 5, the cam 34,
A cam 35 is used for the equilateral triangular reel 19 in FIG. 2, and a cam 36 is used for the equilateral rectangular reel 20 in FIG.

Each cam 34, 35, 36 has a winding reel 16, 19, respectively.
, 20 have working surfaces formed in the same shape at angles that are equal to the central angle with respect to the center of rotation, that is, 180 degrees, 120 degrees, and 90 degrees.

These cams are arranged directly above the movable roller 33 shown in FIG. 5, and are synchronized so that they rotate at the same angular velocity as the rotational angular velocity of the reel.

Referring to FIGS. 5 and 6, when the reference position of the reel 16 is shown, the point E□ of the cam 34 is located on the movable roller 33
is in contact with

1 in this case is equal to 1°. Next, when the reel rotates 18 times, the cam 34 rotates 180 degrees in the direction of the arrow, and the paper rotation point E2 comes into contact with the movable roller.

During this time, the movable roller reciprocates between points 33a and 33b due to the upward component of the tension applied to the film 10 and the use of the cam 34.

If the amount of movement between the reference position of point 33 and points 33a and 33b at this time is set appropriately, 21□ will fluctuate in a predetermined manner, so that 1 will be shortened and lengthened to 1 as shown in FIG. , has the same size as .

The exact same operation is repeated for the next 180 degree rotation.

In addition, the reel 19 and the cam 35, and the reel 20 and the cam 3
In the case of the combination with 6, the same operation can be repeated in 120 degree and 90 degree cycles, although the amount of movement of the movable roller 33 is different.

In this way, the protrusion amount adjustment mechanism 30 shown in FIG.
A movable roller is moved by a cam having a predetermined shape related to the shape of the reel, and l is adjusted to a predetermined value of 1°, so that the film 10 is always maintained at a constant tension.

The shape of the cam is indicated by the symbol r (or a) shown in the diagram.
The cam for the illustrated reels 16, 19, and 20 has a shape roughly shown in FIGS. 6 to 8, although it is determined by the values of tti and the like.

Furthermore, the diameter of the movable roller 33 and the guide rollers 31 and 32 is as small as possible, so that it is easier to adjust the amount of protrusion.
Be accurate.

Next, since the adjustment mechanism shown in FIG. 5 synchronizes the cam and the reel, it operates reliably even in the case of high-speed winding.

Note that if the tension of the film is small and insufficient to drive the movable roller, it is preferable to use a separate spring or the like.

Further, when the amount of protrusion to be adjusted is large, if a plurality of movable rollers are used, the amount of adjustment for each movable roller can be small based on the principle of multiple pulleys.

Even in this case, if the movable rollers are made to interlock, a single cam is sufficient, and if necessary, a cam can be provided for each movable roller.

Furthermore, since the adjustment mechanism of the example shown in FIG. 5 has a simple structure, there is almost no possibility of trouble occurring, and the manufacturing cost is low, as well as the maintenance and inspection costs are low.

From these points, it can be said that this method is more advantageous than the first example, which uses an electromagnetic clutch.

As is clear from the above description, according to the winding device of the present invention, the winding member is held at a constant tension by the protrusion amount adjustment mechanism, and the winding mechanism having the polygonal reel ensures that the workpiece is shaped into a polygon. It is wound up.

Therefore, the winding device is of great practical value not only in the capacitor example described at the beginning but also in other fields.

[Brief explanation of the drawing]

1, 2, and 3 are schematic diagrams showing different embodiments of the winding device according to the present invention, and FIG. 4 shows the rotation angle and rotation angle of the winding reel in the winding device according to the present invention. A diagram showing the relationship between the amount of protrusion of the winding member and the amount of protrusion from the protrusion mechanism, FIG. 5 is a schematic diagram showing a winding device provided with a particularly preferable protrusion amount adjustment mechanism in yet another embodiment of the winding device; 6, 7, and 8 are schematic diagrams showing examples of the shape of the movable roller driving cam in the protrusion amount adjustment mechanism shown in FIG. 5. FIG. In these figures, 10 is a member to be wound (or film); 11 is a protruding mechanism; 12 is a winding mechanism; 16,
19. 20 is a take-up reel; 30 is a protrusion amount adjustment mechanism.

Claims (1)

[Scope of utility model registration request] A device for winding a material to be wound into a polygonal shape while maintaining a constant tension, comprising an ejection mechanism for continuously ejecting the material to be wound while applying tension to the material, and a polygonal winding reel. A winding mechanism for winding up the material to be wound by rotating it at a constant angular velocity, and a protrusion amount adjustment for adjusting the amount of protrusion of the material to be wound from the protruding mechanism in order to maintain the material to be wound at a constant tension. The protrusion amount adjustment mechanism includes a movable roller that swings the member to be wound up and down in a vertical direction perpendicular to the protrusion direction thereof, and a center that each side of the polygonal winding reel occupies with respect to its rotation center. The cam is provided with a cam around which a working surface is periodically formed in the same shape at every angle equal to the angle, and the cam is rotated synchronously at the same angular speed as the rotational angular speed of the take-up reel. A winding device characterized in that, by moving the movable roller up and down, the amount of protrusion of the member to be wound is adjusted in accordance with fluctuations in the winding amount of the winding reel.