JP2000289897A - Paper tube fixing ring, and winding and unwinding device using this paper tube fixing ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify structure, to reduce cost, to facilitate connection and disconnection of a paper tube and to wind and unwind tapes on all of a plural number of the paper tubes installed on one driving shaft without sagging. SOLUTION: A paper tube fixing ring is furnished with a ring and narrow ring main body 2 an outer peripheral part of which fits in a paper tube and a ring body 3 to be fitted on a peripheral part of a circular space part 2a in the center of the ring main body 2 free to slide, having a hole 3b to be fitted on a driving shaft in the center and to rotate and stop with the driving shaft. Additionally, it is devised so that a side part surface 3a out of the ring body 3 is projected from a side part surface 2d of the ring main body 2 and makes contact with the side part surface of the ring main body 2 to be arranged adjacent to it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper tube fixing ring for fixing a paper tube when a tape is wound on or unwound from a paper tube, and a winding using the paper tube fixing ring. It relates to an unwinding device.

[0002]

2. Description of the Related Art A wide (for example, 1000 mm wide) film or sheet (raw material) made of a synthetic resin or paper with an adhesive wound in a coil shape is pulled out while being pulled out.
mm), cut into a tape, and wound simultaneously on, for example, 100 narrow-width paper tubes, each narrow-width paper tube is mounted on one drive shaft, and the drive shaft is rotated to remove the tape from each paper tube. A winding operation is performed such that each of the tubes is simultaneously wound on a tube.

[0003] Also, a number of paper tubes wound with tape are mounted on one drive shaft, the tape is pulled out from each, and the tape is cut and shortly attached to a number of products that move in parallel one after another. There are times when you do work that goes. Even when such an unwinding operation is performed, each narrow paper tube around which the tape is wound is mounted on one drive shaft, and the tape is unwound simultaneously from each paper tube.

[0004]

For fixing the paper tube to the paper tube fixing ring, for example, a claw is provided on the outer peripheral portion of the drive shaft, and the inner peripheral portion of the paper tube is hooked on this. In such a case, there is a possibility that the user may be injured when attaching or detaching the paper tube, or paper dust may be generated and adhere to the product, thereby causing the product to be defective.

[0005] Therefore, a plurality of paper tube fixing rings divided into a plurality of components are provided on a drive shaft, and air is sent to these to move the components, thereby increasing the ring diameter to increase the diameter of the paper tube. There is something that is fixed. However, this method has the drawback that the structure of the paper tube fixing ring becomes complicated, and that each ring needs to have such a structure, which increases the cost. Further, since the structure is complicated, the width cannot be reduced.
It could not be applied to paper tubes of narrow width such as mm.

[0006] On the other hand, a plurality of paper tubes are mounted on a single drive shaft and are simultaneously rotated. However, the thickness and adhesiveness of the film, sheet or tape and the applied adhesive are delicate. In the case of winding, there is a difference in the winding diameter gradually, and the tape that is wound on a small diameter tape becomes slack, so that winding may not be possible at last.

In the case of unwinding, a difference occurs in the unwinding diameter as the tape is unwound, and a tape having a large diameter has a large peripheral speed, so that the unwound tape is slackened.
Therefore, when the drawn-out tape is cut and pasted on products that have moved in parallel, it may not be possible to paste all the products at the same time, or may be staggered.

As described above, conventionally, when a large number of paper tubes are mounted on one drive shaft and the tape is wound or unwound at the same time, it is not possible to eliminate slack.

The present invention has a simple structure and low cost,
A paper tube fixing ring that allows easy attachment and detachment of a paper tube, and that can be wound or unwound without slackening the tape on all of a plurality of paper tubes mounted on one drive shaft, and a paper tube fixing ring. It is an object of the present invention to provide a winding and unwinding device using a fixing ring.

[0010]

According to the present invention, there is provided a paper tube fixing ring comprising: an annular ring main body having an outer peripheral portion fitted with an inner peripheral portion of a paper tube; and a peripheral portion of a circular space at the center of the ring main body. An annular body having a hole at the center for fitting the drive shaft and rotating and stopping together with the drive shaft, wherein an outer side surface of the annular body is a side surface of the ring body. It is configured to protrude further so as to come into contact with the side surface of the ring main body arranged next to it.

Preferably, the paper tube fixing ring has a ring body made of metal and an annular body made of synthetic resin.

Further, at a plurality of locations on the outer peripheral portion of the ring main body,
A concave portion having a different depth where the fixing member is rotatably accommodated is provided, the fixing member is held by a holding member so as not to be detached from the concave portion, and a paper tube is fitted to an outer peripheral portion of the ring main body and the ring is fitted. By moving the main body and the paper tube in directions opposite to each other, the fixing member that is in contact with the inner peripheral portion of the paper tube fitted to the ring main body while rolling to a shallow portion in the recess. The paper tube may be fixed by moving and projecting from the outer peripheral portion of the ring main body.

The fixing member has a cylindrical shape and a shaft penetrates the center of the fixing member. On the other hand, the holding member is provided on the outer peripheral portion of the ring body at two intervals which are parallel and shorter than the length of the shaft of the fixing member. It may be a groove and an annular spring member disposed therein.

Further, in the paper tube fixing ring of the present invention, concave portions having different depths at which the fixing member is rotatably accommodated are provided at a plurality of positions on the outer peripheral portion of the annular ring main body. The paper tube is held by the holding member so as not to be detached from the concave portion, the paper tube is fitted to the outer peripheral portion of the ring body, and the ring body and the paper tube are moved in opposite directions to each other, so that the paper tube fitted to the ring body is The fixing member that is in contact with the inner peripheral portion moves while rolling to a position of a small depth in the concave portion and projects from the outer peripheral portion of the ring main body to fix the paper tube.

Further, the winding and unwinding device of the present invention provides a paper tube fixing ring assembly comprising a drive shaft and a plurality of paper tube fixing rings mounted on the drive shaft and arranged so that the side portions thereof are in contact with each other. And a side pressing device for pressing the paper tube fixing ring assembly from the side direction, wherein the paper tube fixing ring has an annular ring main body whose outer peripheral portion is fitted with the inner peripheral portion of the paper tube, The outer side surface of the ring main body has a hole that fits slidably in the periphery of the circular space at the center of the ring main body, has a hole that fits with the drive shaft at the center, and rotates and stops together with the drive shaft. An annular body protruding from the side surface and in contact with the side surface of the adjacent ring body.

The winding and unwinding device of the present invention further has, at a plurality of locations on the outer peripheral portion of the ring main body, locations having different depths at which a fixing member having a shaft penetrating at the center is movably accommodated. A recess is provided, the fixing member is held by the holding member so as not to be detached from the recess, and a paper tube is fitted to an outer peripheral portion of the ring main body, and the ring main body and the paper tube are moved in opposite directions, thereby fixing member The roller may move while rolling to a shallow depth in the concave portion and protrude from the outer peripheral portion of the ring main body to fix the paper tube.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 5, a paper tube fixing ring 1 of the present invention comprises an annular ring body 2 and an annular body 3, and the annular body 3 has one side 2d of the ring body 2. It is detachably and slidably fitted to the peripheral portion of the center space 2a from the side, and is rotatable separately from the ring main body 2. The annular body 3 does not have to be detachable.

The ring main body 2 is, for example, a narrow annular body made of a metal such as aluminum, and has an outer diameter of 75 mm, an inner diameter (diameter of the space 2a) of 50 mm, for example.
The thickness (width) is 10 mm. On the other hand, the annular body 3 is preferably made of a synthetic resin having low friction and excellent heat resistance and abrasion resistance, for example, PET (polyethylene terephthalate).
Etc. can be used. For example, the outer diameter is 60 mm,
The inner diameter (diameter of the hole 3b) is 35 mm and the thickness is 9 mm. The sizes of the ring main body 2 and the annular body 3 are not limited to these numerical values.

At the periphery of the ring main body 2, there are provided three concave portions 4 at which a fixing member 5 for fixing the paper tube 11 (FIG. 7) is arranged. The fixing member 5 is a cylindrical body (for example, 8 mm in diameter) made of a synthetic resin such as urethane rubber, and has a metal shaft 5a (FIG. 6) penetratingly arranged at the center thereof. The surface of the columnar body may be smooth or provided with irregularities, protrusions, and the like. The fixing member may be other than a columnar member, such as a member in which two disk-shaped members are arranged in parallel.
The paper tube 11 is hollow and made of paper having the same width as or smaller than that of the ring main body 2. However, the paper tube 11 is not limited to paper and may be made of another material such as polyvinyl chloride.

As shown in FIG. 6, the concave portion 4 has two places 6 and 7 whose bottoms are curved in a circular shape. The place 6 (rest position) is a place where the fixing member 5 in the rest state is accommodated and the bottom is slightly. The upper end of the fixing member 5, which is deepened, is slightly out of the outer peripheral portion 2 b of the ring main body 2 and comes into contact with the inner peripheral portion 11 a of the paper tube 11 fitted to the ring main body 2. It has been made like that. On the other hand, the point 7 (fixing position) is a place where the fixing member 5 in which the paper tube 11 is fixed is accommodated, and the bottom is made slightly shallow. Therefore, the upper end of the fixing member 5 arranged at the point 7 It protrudes further outward than the upper end of the arranged fixed part 5.

The outer peripheral portion 2b of the ring main body 2 is provided with two grooves 8 in parallel over the entire circumference, and the groove 8 is provided with a holding member 9 made of, for example, an annular spring member made of metal (for example, 1 mm in diameter). Are fitted. 9a (FIG. 2) is a cut of the annular spring member. The holding member 9 is for preventing the fixing member 5 disposed in the concave portion 4 from separating from the concave portion 4, and the width between the two spring members is substantially equal to the width of the fixing member 5, The length is made smaller than the length of the shaft body 5a. The groove and the spring member may be provided only in the vicinity of the concave portion 4, and a method other than the combination of the groove and the spring member may be used as the holding member.

The annular body 3 is, as shown in FIG.
Has a stepped portion 3c that fits with a stepped portion 2c at the periphery of the center space portion 2a of the center portion 2a. The outer side surface 3a is slightly (for example, about 0.5 mm) outside the side surface 2d of the ring main body 2.

In the center hole 3b of the annular body 3, a metal locking pin 10 as a locking member is provided so as to protrude. The locking pin 10 engages with a locking groove 12a provided in the longitudinal direction of the drive shaft 12 (FIGS. 9 and 10) inserted into the hole 3b. Therefore, the annular body 3 includes the drive shaft 1
It rotates with 2 and stops. The locking member may be provided with a ridge (key) in the longitudinal direction of the drive shaft, and a groove may be provided in the annular body 3 to engage with the ridge, or other locking members may be used. Further, the cross section of the drive shaft 12 may be made non-circular, and the hole 3b of the annular body 3 may be formed in a corresponding shape so that the annular body 3 rotates together with the drive shaft 12 and stops.

To fix the paper tube 11 to the paper tube fixing ring 1, the paper tube 11 is fitted to the ring main body 2 (the annular body 3 is removed) as shown in FIG. In this state, the inner peripheral portion 11 a of the paper tube 11 comes into contact with the fixing member 5. When the paper tube 11 and the ring main body 2 are rotated in the opposite directions in this state, the fixing member 5 in contact with the inner peripheral portion 11a of the paper tube 11 is moved from the position 6 to the position in the recess 4 as shown in FIG. Move while rolling to 7. At point 7, the fixing member 5
Because it protrudes slightly out of the fixing member 5 at the point 6,
The paper tube 11 is fixed by pressing the inner peripheral portion 11 a of the paper tube 11. When the paper tube 11 and the ring main body 2 are rotated in the original directions, the paper tube 11 can be removed from the ring main body 2.

To perform the winding and unwinding operations, the paper core 11
The desired number of paper tube fixing rings 1 with the annular body 3 attached to the ring main body 2 to which are fixed are mounted on the drive shaft 12 as shown in FIG. At this time, the locking pin 10 of the annular body 3
Is mounted while engaging with a locking groove 12a (FIG. 10) as a locking member provided in the longitudinal direction of the drive shaft 12. Reference numeral 13 denotes an end ring for positioning. At the end of the drive shaft 12 opposite to the end ring 13, a side pressing device 15 composed of a hydraulic cylinder or the like for pressing the paper tube fixing ring assembly 14 is arranged.

Thus, in order to wind the narrow tape 16 with the adhesive around each paper tube 11, for example, a double-sided tape is wound around the paper tube 11 in advance, and the starting end of the film 16 is put on the paper tube 11 respectively. When the drive shaft 12 is rotated in the winding direction as shown by an arrow in FIG. 10 in a state in which the paper tube fixing ring assembly 14 is pressed by the side pressing device 15, the annular body 3 is similarly rotated. I do.

As shown in FIG. 11, each ring main body 2 and the annular body 3 come into contact with a step 2c around the center space 2a in the center of the ring main body 2 and a step 3c of the annular body 3, and Since the side surface 2e of the main body 2 is in contact with the side surface 3a of the adjacent annular body 3, a torque is generated in each ring main body 2 by frictional force, and the tape 16 is wound around each paper tube 11. Note that the friction surface of each paper tube fixing ring 1 is the same at the stepped portion 3c and the side surface 3a for any paper tube fixing ring.

Even if the winding diameter of the tape 16 gradually changes due to slight differences in the thickness of each tape 16 wound on each ring main body 2 and the thickness of the adhesive applied thereto, the self or self Each ring body 2 that can rotate independently while being in contact with the adjacent rotating body 3 winds up the tape at its own peripheral speed without sagging. Therefore, even if the winding diameter is small, even if the winding time is longer than the others, the tape is wound on the paper tube without sagging without becoming unwound.

The pressing force (side pressure) of the side pressing device 15
, The tension of the tape at the time of winding can be controlled.

Although the winding operation has been described above, the unwinding operation can also be carried out without loosening the tape.

Further, one paper tube may be fixed by a plurality of paper tube fixing rings, for example, by fixing one wide paper tube with two narrow paper tube fixing rings. In this case, the frictional force is doubled, but the width of the tape wound around the paper tube is also doubled, so that the tension per unit width is the same.

In the figure, the annular body 3 is fitted from one side surface 2d side of the ring main body 2, but the other side surface 2e.
A step is also provided on the side, and the annular body is fitted and arranged also from the side surface 2e side.
It may be made to protrude on the side.

[0033]

According to the paper tube fixing ring and the winding and unwinding device of the present invention, the ring main body to which the paper tube is fixed is connected to the drive shaft via the annular body slidably fitted to the ring main body. Therefore, a torque is generated in the ring main body by the frictional force due to the contact friction with the annular body, so that winding and unwinding can be performed independently. Therefore, even if the winding diameter of the tape wound by the paper tube fixing ring is different from the others, it can be wound or unwound without sagging, and all the tape can be wound or unwound without slack. Unwind.

By changing the side pressure (the pressing force by the side pressing device), the frictional force between the ring body and the annular body can be changed to easily change the torque. The tension of the tape can be easily and freely controlled.

Further, when fixing the paper core to the paper core fixing ring, the paper core can be fixed only by mounting the paper core on the paper core fixing ring and rotating in opposite directions to each other. It is very easy to do, no injuries and no paper dust.

Further, the paper tube fixing ring of the present invention can be made narrow, and can also be used for a paper tube having a narrow width of 40 mm or less, which cannot be handled by the conventional diameter-expandable paper tube fixing ring.

[Brief description of the drawings]

FIG. 1 is a front view of a paper tube fixing ring of the present invention.

FIG. 2 is a side view.

FIG. 3 is a central longitudinal sectional view.

FIG. 4 is a front view of the ring main body.

FIG. 5 is a front view of an annular body.

FIG. 6 is an enlarged view near a concave portion.

FIG. 7 is a diagram showing a state in which a paper core is attached to a ring main body.

FIG. 8 is a view showing a state in which the paper tube has been mounted on the ring main body.

FIG. 9 is a diagram showing a part of a winding and unwinding device.

FIG. 10 is a sectional view showing a winding state.

FIG. 11 is a cross-sectional view showing a state in which a plurality of paper tube fixing rings are mounted on a drive shaft.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper core fixing ring 2 Ring main body 2a Space part 2b Peripheral part 2c Step part 2d Side surface 2e Side surface 3 Annular body 3a Side surface 3b Hole 3c Step part 4 Recess 5 Fixing member 6 places (rest position) 7 places (Fixed position) 8 Groove 9 Holding member 10 Locking pin (Locking member) 11 Paper tube 11a Inner peripheral portion of paper tube 12 Drive shaft 12a Locking groove (Locking member) 13 End plate 14 Paper tube fixing ring assembly 15 Side pressing device 16 Tape

Claims (7)

[Claims] 1. An annular ring main body having an outer peripheral portion fitted with an inner peripheral portion of a paper tube, slidably fitted to a peripheral portion of a center circular space portion of the ring main body, and a drive shaft at the center. An annular body having a hole to be fitted and rotating and stopping together with the drive shaft, the outer side surface of the annular body protruding from the side surface of the ring body, and the side of the ring body disposed next to the ring body. A paper tube retaining ring adapted to contact the surface. 2. The paper tube fixing ring according to claim 1, wherein the ring body is made of metal and the annular body is made of synthetic resin. 3. A plurality of recesses having different depths in which the fixing member is rotatably accommodated are provided at a plurality of positions on the outer peripheral portion of the ring body, and the fixing member is held by the holding member so as not to be detached from the recess. A fixing member that is in contact with the inner peripheral portion of the paper tube fitted to the ring body by fitting the paper tube to the outer peripheral portion of the ring body and moving the ring body and the paper tube in opposite directions to each other; The paper tube fixing ring according to claim 1 or 2, wherein the paper tube fixing ring moves while rolling to a shallow portion in the concave portion and projects from an outer peripheral portion of the ring main body to fix the paper tube. 4. A fixing member having a cylindrical shape and a shaft penetrating the center thereof, while holding members are provided on an outer peripheral portion of the ring main body at parallel intervals shorter than the length of the shaft of the fixing member. 4. The paper tube fixing ring according to claim 3, wherein said ring is a groove and an annular spring member disposed therein. 5. A plurality of recesses having different depths in which the fixing member is rotatably accommodated are provided at a plurality of positions on the outer peripheral portion of the ring body, and the fixing member is held by the holding member so as not to be detached from the recess. A fixing member that is in contact with the inner peripheral portion of the paper tube fitted to the ring body by fitting the paper tube to the outer peripheral portion of the ring body and moving the ring body and the paper tube in opposite directions to each other; The paper tube fixing ring is adapted to move while rolling into a shallow portion in the concave portion and protrude from the outer peripheral portion of the ring main body to fix the paper tube. 6. A paper tube fixing ring assembly comprising a drive shaft, a plurality of paper tube fixing rings mounted on the drive shaft and arranged so that the side portions are in contact with each other, and A side pressing device for pressing the paper tube from the direction, wherein the paper tube fixing ring has an annular ring main body whose outer peripheral portion is fitted to the inner peripheral portion of the paper tube, and a periphery of a central circular space portion of the ring main body. Slidably fits into the ring body, has a hole in the center for fitting with the drive shaft, and rotates and stops together with the drive shaft. The outer side surface projects from the side surface of the ring body and the side of the adjacent ring body. A winding and unwinding device having an annular body in contact with a part surface. 7. A plurality of recesses having different depths in which a fixing member is movably accommodated are provided at a plurality of positions on an outer peripheral portion of the ring body, and the fixing member is held by a holding member so as not to be detached from the recess. By fitting the paper tube around the outer periphery of the ring body and moving the ring body and the paper tube in opposite directions, the fixing member moves while rolling to a shallower depth in the recess, and The winding and unwinding device according to claim 6, wherein the paper tube is fixed by projecting from the outer peripheral portion.