JPH1120994A - Sheet winding tube mandrel device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simply structured sheet winding tube mandrel device wherein a shift is prevented from being generated between the axis of a rotary- controlled main spindle and the axis of a sheet winding tube fitted to be supported around an outer diameter variable supporting means provided in the main spindle. SOLUTION: A rotary-controlled main spindle 2 includes an outer diameter variable supporting means 10 provided to be rotated integrally. The outer diameter variable supporting means 10 is composed of a plurality of tapered rings 3 fitted to the main spindle 2 to be slid and having elastic rings 8 tightly fitted to the tapered outer peripheral surfaces 31 thereof, a plurality of push-in rings 4 facing the tapered rings 3 to be contacted/separated and a position adjusting means 5 for moving the push-in rings 4 toward the tapered rings 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mandrel device for a sheet winding tube for supporting and controlling the rotation of a sheet winding tube for winding or unwinding a sheet such as paper or foil. Insert the tube from a certain direction,
The present invention relates to a cantilever-type mandrel device for a sheet winding tube which presses an inner peripheral wall of the sheet winding tube to fix and support the sheet winding tube.

[0002]

2. Description of the Related Art As a conventional supporting device for a sheet winding tube of this kind, Japanese Patent Application Laid-Open No. 63-51249 and Japanese Patent Application Laid-Open
An apparatus disclosed in, for example, Japanese Patent No. 74851 is known.

The core mounting apparatus disclosed in Japanese Patent Application Laid-Open No. 63-51249 is a core mounting apparatus which presses and supports the core from both ends. As shown in FIG. A shaft head 53 is provided. The shaft head 53 is constituted by a flange portion 54, a tapered portion 55, and a locking end portion 56 from the side of the main body frames 1, 1, and between the flange portion 54 and the locking end portion 56. The elastic ring 8 having elasticity that rotates the tapered portion 55 is fitted. When the core is mounted from the locking end 56 side of the shaft head 53, the elastic ring 8 hits the end of the core, and when the core is further pushed in, the elastic ring 8 rotates or slides. The O-ring of the elastic body expands by moving to the large-diameter side of the tapered portion 55, and is positioned at the large-diameter portion to firmly lock the winding core. The combination of the movable ring 55 and the movable elastic ring 8 can prevent the generation of dust caused by scraping the core with a simple operation and can lock the core securely.

Next, the winding core fixing device disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 63-74851 discloses a plurality of sliders 68 spaced at angular intervals around the winding cones 3L and 3R as shown in FIG. Is arranged so that the sliders 68, 68 are slidably engaged with the tapered surfaces 69 of the winding cones 3L, 3R, and the end surfaces of the winding core 9 are brought into contact with the outer peripheral surfaces of the sliders 68, 68. Is formed on the outer peripheral surface of each of the sliders 68, 68.
The elastic body 65 for pressing against the inner peripheral surface of the elastic body 65 is projected, and the wedge action of the tapered surface 69 and the slider 68 and the elastic body 65
The winding core 9 is fixed by the elasticity of the winding core 9. The winding core 9 can be firmly fixed, and there is no need to bite the conventional knife into the inner peripheral surface of the winding core 9. This has an effect that the inner peripheral surface of the winding core 9 is not damaged and chips are not generated, and even if the diameter of the winding core 9 varies, it can be fixed accurately. It is.

[0005]

Among the above-mentioned prior arts, in a winding core mounting apparatus disclosed in Japanese Patent Application Laid-Open No. 63-51249, a tapered portion 55 provided on a shaft head 53 is disclosed.
And the locking end 56 of the shaft head 53 toward the elastic ring 8 fitted in the valley formed by the locking end 56.
The core 9 is mounted from the side, and when the side surface of the elastic ring 8 and the end face of the core 9 are first brought into contact with each other, the axes of the elastic ring 8 and the core 9 are aligned and contacted. The operation to make was very difficult work.

Therefore, in the actual mounting operation, a part of the inner peripheral edge of the end face of the winding core 9 and a part of the side surface of the elastic ring 8 opposed thereto come into contact, and finally, the first contact. By contacting the portion located on the opposite side to the axis with the portion, the contact of the entire circumference is completed, the core 9 is further pushed in, and the elastic ring 8 is moved to the side where the diameter of the tapered portion 55 is large. Will move. But,
At this time, the elastic ring 8 has an uneven position in the axial direction and an uneven pressure in the radial direction.

As a result, a misalignment occurs between the axis of the main shaft 2 and the axis of the core 9, and the misalignment hardly coincides on the left and right sides of the core 9. When rotation is given to the winding core 9 by rotation, the rotation of the winding core 9 has an irregular eccentric rotational movement in the right and left direction.

[0008] Even if the misalignment is a slight amount, in high-precision slitting work such as a foil for which the slit width accuracy is required on the order of μm, even if the winding core 9 is slight, the scraping motion is performed. If the right and left irregularly eccentric rotational movements are performed, the tension at both ends in the width direction of the foil varies, which may adversely affect the cut portion of the slit device and cause a fatal defect.

Next, among the above-mentioned prior arts, Japanese Patent Laid-Open Publication No.
In the take-up core fixing device disclosed in Japanese Patent No. 74851, the take-up core 9 fixed to the outer peripheral surface of the slider 68 provided on the take-up cones 3L and 3R has the same structure as the take-up core fixing device disclosed in Japanese Patent Publication No. 74851. Although the misalignment unlike the first prior art does not occur between them, there is a problem that the structure of the entire apparatus becomes complicated and the apparatus becomes expensive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and has an extremely simple structure, and has a shaft center of a rotation-controlled main shaft and a variable outer diameter provided on the outer periphery of the main shaft. There is no misalignment between the axis of the sheet winding tube that is externally supported by the support means, and it can be used with confidence in high-precision slitting work such as foil, which requires cutting accuracy on the order of μm. It is an object of the present invention to provide a mandrel device for a sheet winding tube that can be used.

[0011]

In order to solve the above-mentioned problems, the present invention employs the following means. A first invention for which a patent is sought is a sheet winding mandrel device for controlling the rotation of the sheet winding tube by externally supporting the sheet winding tube by means of a variable outer diameter support means, comprising a main shaft whose rotation is controlled. A mandrel device for a sheet winding tube comprising: a variable outer diameter supporting means incorporated in the main shaft and integrally rotating with the main shaft; wherein the variable outer diameter supporting means incorporated in the main shaft to be rotationally controlled has an axis attached to the main shaft. A plurality of tapered rings which are slidably fitted in the center direction and have a tapered outer peripheral surface at the outer peripheral portion, and are provided on the tapered outer peripheral surface side of the tapered ring so as to be capable of coming and coming in the axial direction with respect to the tapered ring. A plurality of push rings, a position adjusting means for moving the push ring in the axial direction, and an elastic ring closely fitted to a predetermined position on a taper outer peripheral surface of the taper ring. The diameter of the maximum outer diameter portion of the tapered ring and the push-in ring and the outer diameter of the elastic ring when the tapered ring is closely fitted to a predetermined position of the tapered ring are respectively predetermined from the inner diameter of the sheet winding tube. The diameter is made smaller by the value, the pushing ring is moved closer to the taper ring by a predetermined distance by the position adjusting means, and the elastic ring is moved to the larger diameter of the taper outer peripheral surface of the taper ring. The inner peripheral wall of the sheet winding tube is pressed by the outer peripheral portion of the expanding elastic ring to externally support the sheet winding tube.

In this manner, the elastic ring which is closely fitted to a predetermined position of the tapered outer peripheral surface of the tapered ring fitted to the main shaft is pushed in, and the side surface of the elastic ring is simultaneously tapered over the entire circumference by the ring. The outer diameter of the elastic ring is uniformly enlarged by moving the outer diameter of the tapered outer peripheral surface of the ring to the larger diameter, and the axis of the main shaft which is rotationally controlled, and the outer diameter variable support means provided on the outer periphery of the main shaft The sheet winding tube is externally fitted to and supported by the sheet winding tube mandrel device so that the axis of the sheet winding tube externally supported by the sheet winding tube becomes coaxial.

According to a second aspect of the present invention, the approach distance of the push ring to the taper ring is regulated by a stopper provided on the taper ring and the push ring. It is a mandrel device for pipes, and the approach distance of a plurality of pairs of taper ring and push ring is set to the same distance by stoppers provided on the taper ring and push ring so that they fit tightly on the taper outer peripheral surface of each taper ring. The diameters of the elastic rings that are combined are made substantially equal to each other so that the pressing force of the elastic rings against the inner peripheral wall of the sheet winding tube is made substantially constant over all.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The sheet winding tube is pushed into the predetermined position of the variable outer diameter support means from the front end side of the variable outer diameter support means of the sheet reel tube middrel device constructed as described above, and the sheet is wound. The pipe is externally fitted to the outer diameter variable support means, and then the push ring is pushed toward the taper ring by the position adjusting means provided near the main spindle end to tightly fit at a predetermined position on the taper outer surface of the taper ring. When the elastic ring such as the O-ring is moved uniformly over the entire circumference to the larger diameter of the tapered outer peripheral surface of the tapered ring, the outer peripheral diameter of the elastic ring gradually increases with that, First, the upper outer peripheral portion of the elastic ring pushes up the upper portion of the inner peripheral wall of the sheet winding tube loosely fitted to the outer diameter variable support means to raise the sheet winding tube.

[0015] The lower portion of the inner peripheral wall of the elastic ring is kept in contact with the lower portion of the inner peripheral wall of the sheet winding tube until the lower peripheral portion of the elastic ring contacts the lower portion of the inner peripheral wall of the elastic ring. Then, the lifting of the sheet winding tube stops, and at the same time, the outer periphery of the elastic body ring almost uniformly contacts the entire circumference along the inner peripheral wall of the sheet winding tube. At this time, the axis of the main shaft of the mandrel device for sheet winding tube and the axis of the sheet winding tube are concentric. After that, the outer diameter of the elastic ring is continuously increased by the position adjusting means so that the externally fitted sheet winding tube is pressed by the elastic ring from the inner peripheral wall side so that the axis of the main shaft of the sheet winding mandrel device is rotated. Strongly supported with the same heart.

[0016]

An embodiment of the present invention will be described with reference to the drawings. 1 to 3 are cross-sectional views of a main part of an embodiment of a mandrel device for a sheet winding tube according to the present invention.

In FIG. 1, a cantilever type main shaft 2 rotatably provided by a bearing means on a main body frame 1 is provided with a variable outer diameter support means 10 and a predetermined rotation is performed by a rotation control means (not shown). A force or braking force is applied. And the outer diameter variable support means 10
Has the following configuration.

A shaft step 22 serving as a stopper is provided at one end of the fitting shaft 21 of the main shaft 2. The fitting shaft 21 continuous with the shaft step 22 is At least two or more tapered rings 3 and 3 and at least two or more pushing rings 4 and 4 are provided on the outer peripheral portion of the tapered ring 3 via collars 6 and 7 having a predetermined thickness. The tapered outer peripheral surface 31 and the pushing surface 41 of the pushing ring 4 are opposed to each other, and are fitted slidably in the axial direction. Also, the diameters of the maximum outer diameter portions of the collars 6 and 7, the tapered rings 3 and 3, and the push rings 4 and 4 are respectively predetermined values larger than the inner diameter of the sheet winding tube 9 to be fitted and supported. It has a small diameter, and is integrally rotated with the main shaft 2 by a rotation preventing means such as a key or a spline.

On the other hand, the front end side of the main shaft 2, that is, the fitting shaft portion 2
In the vicinity of the other end of the shaft 1, push rings 4, 4, a collar 7 fitted therebetween, and position adjusting means 5 for pushing the taper ring 3 toward the shaft step 22 of the main shaft 2. The taper ring 3 and the pushing ring 4 can be brought closer by a predetermined distance by the position adjusting means 5. By loosening the position adjusting means 5, the distance between the tapered ring 3 and the pushing ring 4 can be increased.

An elastic ring 8 such as an O-ring is tightly fitted at a predetermined position on the small-diameter side of the tapered outer peripheral surface 31 provided on the outer peripheral portion of the tapered ring 3. Of the tapered outer peripheral surface 31 so as not to fall off.

The outer diameter of the elastic ring 8 and the shape and dimension of the tapered outer surface 31 of the tapered ring 3 are determined when the elastic ring 8 is tightly fitted to a predetermined position on the small diameter side of the tapered outer surface 31. The outer diameter of the elastic ring 8 is smaller by a predetermined value than the inner diameter of the sheet winding tube 9 to be fitted and supported, and the pushing action by the position adjusting means 5 causes the taper ring 3 and the pushing ring 4 to move by a predetermined distance. The elastic ring 8 approaches and the taper ring 3
The outer diameter of the elastic ring 8 is substantially the same as the inner diameter of the sheet winding tube 9 when it is pushed by a predetermined distance toward the larger diameter of the tapered outer peripheral surface 31. The shape and dimensions are set so that the outer diameter of the ring 8 is larger than the inner diameter of the sheet winding tube 9.

The outer diameter of the collar 6 provided adjacent to the shaft step portion 22 of the fitting shaft portion 21 of the main shaft 2 has an outer diameter larger than the outer diameter of the sheet winding tube 9 to be fitted and supported. The stopper ring 11 is fitted, and can be fixed at an arbitrary position in the axial direction of the collar 6 by fixing means such as a set screw.

Next, a procedure for externally supporting the sheet winding tube 9 on the sheet winding tube mandrel device provided with the outer diameter variable support means 10 configured as described above will be described.

First, the tapered outer peripheral surface 3 of each tapered ring 3
The distance between each tapered ring 3 and the pushing ring 4 is reduced by, for example, loosening the position adjusting means 5 so that each of the elastic rings 8 closely fitted to 1 is located near a predetermined position on the small diameter side of the tapered outer peripheral surface 31. I'll secure it. At this time, the adjustment is performed so that the pressing surface 41 of the pressing ring 4 is in contact with the elastic ring 8 over the entire circumference. The sheet winding tube 9 is externally fitted into the thus prepared outer diameter variable support means 10 from the front end side of the outer diameter variable support means 10 until the front end of the sheet winding tube 9 hits the side surface of the stopper ring 11. The upper part of the elastic ring 8 holds the upper part of the inner peripheral wall of the sheet winding tube 9.

In this state, the push ring 4 is pushed toward the taper ring 3 by the position adjusting means 5, and the elastic ring 8 is pushed toward the larger diameter of the tapered outer peripheral surface 31. As a result, the outer periphery of the elastic ring 8 is substantially uniformly contacted over the entire circumference along the inner peripheral wall of the sheet winding tube 9, and the axis of the main shaft 2 of the sheet winding tube mandrel device and the axis of the sheet winding tube 9 are aligned. Become the same. Thereafter, the outer diameter of the elastic ring 8 is continuously increased by the position adjusting means 5 so that the sheet winding tube 9 fitted outside is strongly supported by the pressing force of the elastic ring 8 from the inner peripheral wall side. . At this time, the sheet winding tube 9 receives a force toward the shaft step 22 side by the elastic body ring 8, but the movement in the axial direction is restricted by the stopper ring 11. No deviation occurs.

In the embodiment described above, the elastic ring 8 tightly fitted to the tapered outer peripheral surface of the tapered ring 3 at a predetermined position on the small diameter side is an O-ring. A ring-shaped coil spring may be used, or at least three or more elastic bodies may be connected endlessly at equal intervals by a stretchable string, or their cross-sectional shape is limited to a circle. not.

Next, another embodiment will be described with reference to FIG. 2. In FIG. 2, a stopper 32 comprising a ring-shaped step is provided on the outer peripheral surface on the small diameter side of the tapered outer peripheral surface 31 of the tapered ring 3. When the stopper 41 comes into contact with the stopper 32, the approach distance of the push ring 4 to the taper ring 3 is regulated to be constant. The stopper 32 has an outer diameter dimension sufficient to strongly support the inner peripheral wall of the sheet winding tube 9 in which the outer periphery of the elastic ring 8 closely fitted to the tapered outer peripheral surface 31 is externally fitted by pressing force. The elastic ring 8 is provided at a position where the elastic ring 8 is pushed into the larger diameter of the tapered outer peripheral surface 31 until it is enlarged.

According to this configuration, the stopper 32 of the tapered ring 3 and the pushing surface 41 of the pushing ring 4 are brought into contact with each other in all combinations of the plurality of combinations of the tapering ring 3 and the pushing ring 4 by the position adjusting means 5. By doing so, the pressing force of the elastic ring 8 against the inner peripheral wall of the sheet winding tube can be all constant.

FIG. 3 is a view showing still another embodiment, in which the pushing surface 41 of the pushing ring 4 is formed into a tapered surface and the pushing surface 41 is formed.
In this configuration, the stopper 42 is provided separately, and according to this configuration, the amount of deformation of the cross-sectional shape of the elastic ring 8 is reduced, so that the deterioration of the elastic ring 8 can be reduced and the life thereof can be extended.

In the embodiment described above, the stopper for regulating the approach distance between the tapered ring 3 and the push-in ring 4 to be constant is provided on the small-diameter side surface of the tapered outer peripheral surface 31 of the tapered ring 3. Although the configuration constituted by the pressing surface 41 of the pushing ring 4 has been described, the present invention is not limited to this configuration, and any configuration can be used as long as the approach distance between the tapered ring 3 and the pushing ring can be regulated to be constant. May be. In addition, although the combination of the taper ring 31 and the press-in ring 41 is illustrated in two sets, it is needless to say that three or more sets may be provided.

In the embodiment, each tapered ring 3
Is provided on the body frame 1 side, and the pushing ring 4 is provided on the position adjusting means 5 side to make the pushing ring 4 approach toward the taper ring 3. However, each pushing ring 4 is provided on the body frame 1 side, The ring 3 may be provided on the position adjusting means 5 side.
Since a force to the side is also received, the leading end of the sheet winding tube 9 is separated from the stopper 11, and there is a possibility that the sheet winding tube 9 may be misaligned in the axial direction, which is not preferable. Further, in the embodiment, the position adjusting means 5 is illustrated as a handle type using screws, but it is also possible to use an automatic type using pneumatic pressure or hydraulic pressure.

[0032]

As described above, according to the mandrel device for a sheet winding tube of the present invention, despite its extremely simple structure, the axis of the spindle controlled to rotate and the outer periphery of the spindle are attached to the outer periphery of the spindle. There is no misalignment with the axis of the sheet winding tube which is externally supported by the outer diameter variable support means provided so as to rotate integrally with the elastic body of the upper outer diameter variable support means. Since the inner circumferential wall of the sheet winding tube is pressed and held evenly and strongly along the circumference by the ring, the sheet winding tube does not deform and the roundness is always maintained. Therefore, it can be used without problem even in high-precision slitting work of foil or the like, which requires cutting accuracy on the order of μm, and the effect is large.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a sectional view showing another embodiment of the present invention.

FIG. 4 is a sectional view showing a conventional core mounting device.

FIG. 5 is a sectional view showing a conventional winding core fixing device.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Main body frame 2 Main shaft 3 Taper ring 4 Push-in ring 5 Position adjusting means 6 Collar 7 Collar 8 Elastic ring 9 Sheet winding tube (winding core, winding core) 10 Outer diameter variable support means 11 Stopper ring

Claims (2)

[Claims] 1. A mandrel device for a sheet winding tube for controlling the rotation of the sheet winding tube by externally supporting the sheet winding tube by a variable outer diameter support means, the main shaft being controlled in rotation, and being incorporated in the main shaft. In a mandrel device for a sheet winding tube comprising a main shaft and a variable outer diameter supporting means that rotates integrally, the variable outer diameter supporting means incorporated in the main shaft controlled to rotate is slidable in the axial direction on the main shaft. A plurality of tapered rings fitted and having a tapered outer peripheral surface at an outer peripheral portion; and a plurality of push rings provided on the tapered outer peripheral surface side of the tapered ring so as to be able to approach and separate in the axial direction with respect to the tapered ring. And a position adjusting means for moving the push ring in the axial direction, and an elastic ring closely fitted to a predetermined position on the tapered outer peripheral surface of the tapered ring,
The diameter of the maximum outer diameter portion of the tapered ring and the pushing ring and the outer diameter of the elastic ring when the tapered ring is tightly fitted to a predetermined position of the tapered ring are respectively predetermined from the inner diameter of the sheet winding tube. The diameter is made smaller by the value, and the push ring is moved closer to the taper ring by a predetermined distance by the position adjusting means to move the elastic ring to the larger diameter of the taper outer peripheral surface of the taper ring. A mandrel device for a sheet winding tube, wherein the expanding outer peripheral portion presses an inner peripheral wall of the sheet winding tube to externally support the sheet winding tube. 2. The mandrel device for a sheet winding tube according to claim 1, wherein the approach distance of the pushing ring to the tapering is regulated by a stopper provided on the tapering and the pushing ring.