JPH11157710A - Roll core chucking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll core chucking device capable of chucking a roll core easily without damaging it and of accurately transmitting torque to it. SOLUTION: In the roll core chucking of a rotating support device having a roll core 1 and a chucking nose 2 and used to wind and unwind a web, the chucking nose 2 has on its outer periphery a pin holding shaft 5 holding a pin 6 energized and advanced in the direction parallel to the rotating shaft of the roll core 1, and the roll core 1 has in its center a center hole 3 into which the chucking nose 2 fits, and has on its end face 7 a pin hole 4 into which the pin 6 fits. The pin holding shaft 5 is rotatable relative to the chucking nose 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to paper, film,
The present invention relates to a roll core chucking device that fits a roll core and a nose in a winding or rewinding device for a foil, a fabric, or the like (hereinafter, these are collectively referred to as “web”).

[0002]

2. Description of the Related Art Various techniques are conventionally known for a device for chucking a roll core and a nose in a web winding or rewinding device. For example, 6-6
As described in Japanese Patent No. 5350, a chucking device having a chuck nose on which a plurality of press-contact claws are radially mounted, wherein the tip surface of the press-contact claws has fine irregularities having a saw-tooth cross section. The total area of the press-contacting claw tip surface is 30 of the area of the portion of the inner peripheral surface of the roll core inscribed in the chuck nose.
% Or more, there is known a take-up roll core chucking device. However, in the above-described conventional technology, the rotational torque is transmitted directly from the nose to the core, and the rotational torque cannot be transmitted sufficiently by slipping between the core and the nose. In order to do so, the core and the nose must be strongly pressed, and there is a problem that the core is easily scratched.

[0003] Further, as described in JP-A-8-113394, in a roll core supporting device,
By inserting a pin provided on the rotating support so as to be freely retractable by the urging force of the elastic member into a hole formed in the roll core, torque from the rotating support is transmitted to the roll core through the pin. There is known a roll core supporting device. However, the above prior art is
Since the pin provided on the nose rotates together with the rotation of the nose, there is a problem that the pin cannot be smoothly inserted into the pin hole.

Further, as described in Japanese Utility Model Laid-Open No. 5-1746, an annular groove is formed in the outer periphery of a chuck nose which is integrally formed with a rotatable shaft and which can be fitted on a roll core. A ring-shaped expandable / contractible tube is attached to the annular groove, and a fluid outlet / inlet channel for supplying / discharging fluid for expansion / contraction to the tube is formed inside the shaft. Roll core chucking characterized by being joined to an end of a roll core is known. However, in the above-mentioned conventional technology, the rotational torque is transmitted directly from the nose to the core, and there is a problem that the rotational torque cannot be sufficiently transmitted by slipping between the core and the nose.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and does not damage the roll core, facilitates chucking, and accurately transmits the rotational force to the roll core. It is an object of the present invention to provide a roll core chucking device that can perform the same.

[0006]

According to the present invention, there is provided a roll core chucking device for a rotary support device for winding and rewinding a web having a roll core and a chucking nose. The chucking nose has, on its outer periphery, a pin holding shaft for holding a pin that is pushed and pushed in a direction parallel to the rotation axis of the roll core, and the roll core has the chucking center at its center. A center hole into which the nose fits, and a pin hole into which the pin fits in the end surface, wherein the pin holding shaft is rotatable relative to the chucking nose.

According to a second aspect of the present invention, in the roll core chucking device according to the first aspect, the chucking nose and the pin holding shaft are temporarily rotatable relative to each other. According to a third aspect of the present invention, in the roll core chucking device according to the first aspect, only the pin holding shaft is driven to rotate, and the chucking nose does not transmit a rotational force from the pin holding shaft. According to a fourth aspect of the present invention, in the roll core chucking device of the first aspect, the chucking nose has a structure in which at least a part thereof can be radially expanded and contracted.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a roll core chucking device according to the present invention will be described with reference to the drawings. As shown in the schematic cross-sectional view of FIG. 1, a roll core 1 for winding and rewinding a web is supported at its end by a chucking nose 2, and is rotated by transmitting torque from a motor (not shown).

The roll core 1 has a cylindrical shape having a center hole 3, and a plurality of pin holes 4 are provided on an end surface of the roll core 1 at equal intervals on a circumference centered on the axis of the roll core 1. The chucking nose 2 can be fitted into the center hole 3 of the roll core 1, and a cylindrical pin holding shaft 5 that is rotatable relative to the chucking nose 2 is provided around the chucking nose 2. I have. A plurality of pin holding holes 10 are formed at the tip of the pin holding shaft 5, and a pin 6 that is urged to advance in a direction parallel to the rotation axis of the roll core 1 is fitted into each of the pin holding holes 10. I have. The pin 6 is provided in a pin hole 4 provided in the end face of the roll core 1.
Can be fitted.

As shown in FIG. 1, each pin holding hole 10 is
At the end face of the tip of the pin holding shaft 5, the chucking nose 2
Are provided at equal intervals on a circumference centered on the axis.
A spring 11 is inserted into the pin holding hole 10, and the pin 6 is disposed thereon. When the pin 6 is pressed in the axial direction, the pin 6 is embedded in the pin holding hole 10, and when released from this pressing force, the pin holding is performed. It protrudes from the end face 8 of the shaft 5.

FIG. 2 is a side view of the roll core 1, showing an example in which eight pin holes 4 are provided on the end face of the roll core 1. The inner diameter of the pin hole 4 is made larger than the outer diameter of the pin 6 described later.

FIG. 3 is a side view of the chucking nose 2. A pin holding shaft 5 is provided around the chucking nose 2 so as to be rotatable relative to the chucking nose 2. Here, the meaning that the pin holding shaft 5 is rotatable relative to the chucking nose 2 means that the pin holding shaft 5 and the chucking nose 2 can rotate with each other in a mutual relationship. The holding shaft 5 is driven to rotate, and the chucking nose 2 has a pin holding shaft 5.
When the rotation force is not transmitted from the motor, when the pin holding shaft 5 is also rotatable with respect to the rotatable chucking nose 2, the pin holding shaft 5 and the chucking nose 2 usually rotate integrally, but this is necessary. Accordingly, the case where the pin holding shaft 5 and the chucking nose 2 temporarily rotate relative to each other, the case where the chucking nose 2 rotates with respect to the pin holding shaft 5 and the like are also included. At the tip of the pin holding shaft 5, a pin 6 is provided which is urged to advance in a direction parallel to the rotation axis of the roll core 1. The pin 6 is biased by, for example, a spring. Therefore, when the pin holding shaft 5 is rotated while the end face 7 of the roll core and the end face of the pin holding shaft 5 are in contact with each other,
Since the inner diameter of the pin hole 4 is made larger than the outer diameter of the pin 6, when the pin 6 matches the position of the pin hole 4, the pin 6 and the pin hole 4 are fitted by the elastic force of the spring. It has become.

FIG. 2 shows an example in which eight pin holes 4 are provided on the end face of the roll core 1 at 45 ° intervals.
In the above, four pins 6 are arranged at 90 ° intervals on the pin holding shaft 5.
2 shows an example provided on the end face. Although the number of the pin holes 4 and the number of the pins 6 are arbitrary, the number of the pin holes 4 needs to be equal to or more than the number of the pins 6. Although the number of the pins 6 may be one, it is generally preferable that the number is two or more.

The chucking nose 2 has a structure in which at least a part of its tip can be expanded and contracted. In the example shown in FIG. 1, a collet 12 is provided around the tip of the chucking nose 2, and the chucking nose 2 is provided.
Is enlarged, the core of the chucking nose 2 and the core of the roll core 1 match. The expansion / contraction mechanism is not particularly limited. However, if rubber or the like is used as in winding expansion, eccentricity is likely to occur. Therefore, a mechanism using metal contact such as a ball screw, a tapered cone, or a rotating cam is preferable.

Next, the chucking process of the roll core 1 by the chucking nose 2 will be described in order. First, the roll core 1 is received by the table 9. Next, the contracted chucking nose 2 is inserted into the roll core 1. At this time,
The end face 7 of the roll core 1 is brought into contact with the end face of the pin holding shaft 5. Then, the table 9 is retracted. Then, the contracted chucking nose 2 is expanded in the radial direction, and the roll core 1 is expanded.
The centering is performed by matching the inner diameter of the chucking nose 2 with the outer diameter of the chucking nose 2. Then, the pin hole 4 and the pin 6 are fitted by rotating the pin holding shaft 5, and the chucking process is completed.

The present invention is characterized in that the pin holding shaft 5 is rotatable relative to the chucking nose 2. The chucking nose 2 and the pin holding shaft 5 may be normally rotatable relative to each other, or may be normally rotated integrally, and a series of operations for fitting at least the pin 6 into the pin hole 4 of the roll core 1. May be performed, the pin holding shaft 5 may be temporarily rotated relative to the chucking nose 2. As described above, the pin 6 can be easily fitted into the pin hole 4 of the roll core 1 by rotating the pin holding shaft 5 relative to the chucking nose 2 while holding the roll core 1 with the chucking nose 2. . Conversely, even if only the chucking nose 2 holding the roll core 1 is relatively rotated with respect to the pin holding shaft 5, the pin 6 can be easily fitted into the pin hole 4 of the roll core 1 in the same manner.

At the time of winding and unwinding the web, the chucking nose 2 and the pin holding shaft 5 may be rotated integrally, or only the pin holding shaft 5 may be rotated. In a preferred embodiment of the present invention, the chucking nose 2 and the pin holding shaft 5 are structured so as not to rotate integrally, and the rotational force from the rotating support is transmitted only to the pin holding shaft 5, That is, a structure for transmitting to the roll core 1 is adopted.

As described above, according to the chucking device of the present invention, since the contracted diameter of the chucking nose 2 is smaller than the inner peripheral diameter of the roll core 1, the chucking nose 2 can be easily inserted into the center hole 3 of the roll core 1. Can be inserted into
Thereafter, the center of the roll core 1 and the center of the chucking nose 2 coincide with each other by radially expanding the outer diameter of the chucking nose 2 to the inner diameter of the roll core 1. That is, even if the alignment of the axis of the roll core 1 and the axis of the chucking nose 2 is not accurately performed, the axis of the roll core 1 and the axis of the chucking nose 2 can be easily aligned by expansion and contraction of the chucking nose 2. .

The axis of the chucking nose 2 and the center of the circumference of the pin 6 provided on the outer peripheral portion of the chucking nose 2 coincide with each other, and the axis of the roll core 1 and the end face of the roll core are provided. The center of the circumference of the pin hole 4 coincides, and as a result, the pin 6 and the pin hole 4 can be easily aligned. Therefore, it is possible to perform positioning in a short time with replacement of the roll core.

In the above embodiment, an example in which the pin hole 4 is provided on the roll core end face 7 and the pin is provided on the pin holding shaft 5 has been described, but the arrangement of the pin hole and the pin is reversed. Is also good. Further, the chucking nose 2 has a structure capable of expanding and contracting in the radial direction. However, the entire chucking nose 2 may be expanded or contracted, or a part thereof may be expanded or contracted. Further, the chucking nose 2 may be a tapered nose as shown in FIG. If the chucking nose 2 is tapered, the chucking nose 2 can be easily fitted into the center hole 3 of the roll core 1, and the chucking nose 2 can be fitted to the center hole 3 of the roll core 1.
By inserting the chucking nose 2 into a predetermined position, the centering can be performed while the outer diameter of the chucking nose 2 and the inner diameter of the center hole 3 of the roll core 1 are aligned. No need.

[0021]

According to the first aspect of the present invention, winding of a web having a roll core and a chucking nose,
A roll core chucking device of a rotation support device for performing rewinding, wherein the chucking nose has a pin holding shaft on an outer periphery thereof for holding a pin which is pushed and pushed in a direction parallel to a rotation axis of the roll core. The roll core has a center hole in the center of which the chucking nose fits, and a pin hole in the end face of the roll core, in which a pin holding shaft is relatively positioned with respect to the chucking nose. Since the rotation is made possible, the chucking operation can be performed quickly and easily by rotating the pin holding shaft relative to the chucking nose in the chucking operation. In addition, since the roll core is rotated by fitting the pin and pin hole instead of rotating the roll core with the nose, slipping does not occur for high-speed, heavy-weight rotation, and the rotation of the support device is accurately performed on the roll core. Can be transmitted to

According to a fourth aspect of the present invention, in the first aspect of the invention, at least a part of the chucking nose has a structure capable of expanding and contracting in the radial direction. Even if the alignment of the core is not performed accurately, the axial center of the roll core and the chucking nose can be easily aligned by expanding and contracting the chucking nose.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of a chucking device according to the present invention.

FIG. 2 is a side view showing an example of a roll core that can be used in the present invention.

FIG. 3 is a side view showing an example of a chucking nose that can be used in the present invention.

FIG. 4 is a schematic view showing an example of a chucking nose that can be used in the present invention.

[Explanation of symbols]

 1 Roll core 2 Chucking nose 3 Center hole 4 Pin hole 5 Holding hole 6 Pin 7 End face

Claims (4)

[Claims] 1. A roll core chucking device of a rotary support device for winding and rewinding a web having a roll core and a chucking nose, wherein the chucking nose has a rotating shaft of the roll core on its outer periphery. The roll core has a center hole into which the chucking nose fits at the center thereof, and the pin fits into an end face thereof. A roll core chucking device, comprising: a pin hole; and the pin holding shaft is rotatable relative to the chucking nose. 2. The roll core chucking device according to claim 1, wherein the chucking nose and the pin holding shaft are temporarily rotatable relative to each other. 3. The roll core chucking apparatus according to claim 1, wherein only the pin holding shaft is driven to rotate, and the chucking nose does not transmit a rotational force from the pin holding shaft. 4. The roll core chucking device according to claim 1, wherein at least a part of the chucking nose is radially expandable and contractable.