JPH0517055A - Winding core supporting device - Google Patents

Abstract

PURPOSE:To efficiently transmit the revolution of a collar body to a winding core such as paper tube, facilitate manufacture by reducing the number of parts and frictionally joining rolling bodies easily for the winding core which is externally inserted, on the start of revolution. CONSTITUTION:A annular ring 5 is fitted in the groove 6 on the outer periphery of a collar body 3, and a recessed cut part 7 is formed on the side part of the groove 6, and the bottom surface 8 of the recessed cut part 7 is inclined so that one edge side in the peripheral direction becomes shallow, with respect to the tangential direction. On the annular ring 5, a cut part 4 which is opened 41 is formed on the outer periphery in the narrower width than that in an inside part, at the position corresponding to the recessed cut part 7, and rolling bodies 9 which roll on the inclined bottom surface 8 are inserted into the cut part 4, and when the rolling body 9 is at the shallow position of the inclined bottom surface 8, the rolling body projects from the opened port of the cut part, and is engaged with the inner surface of a winding core (a). A means for the elastic press-attachment on the inner surface of the winding core by a spring means 11 is instaled at the equal interval positions in the peripheral direction of the annular ring 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a winding device for slitting a sheet strip of a thin plate such as paper, cloth, plastic film and metal foil into an arbitrary width and winding it, or a sheet strip wound around a winding core. The present invention relates to a winding core supporting device in an unwinding device for unwinding.

[0002]

2. Description of the Related Art Conventionally, in a winding device for a sheet band, a collar provided so as to transmit rotation mainly by frictional coupling to a rotary drive shaft and a collar for a hollow core such as a paper tube externally inserted in the collar. Various means have been proposed as a winding core supporting device such as a winding shaft that has a means for transmitting the rotation of the above and rotates the externally inserted winding core by restraining it in one rotation direction. In this core support device, as means for transmitting the rotation of the collar to a hollow core such as a paper tube, rolling elements are mounted in a plurality of recessed portions having inclined bottom surfaces provided on the outer periphery of the collar, and the rolling elements are inclined. It is common that the inner surface of the winding core is joined by friction when it is located at a shallow position on the bottom surface.

As this type of core support device, two fitting grooves are provided in the circumferential direction of the outer periphery of the collar body, and the protrusions between the fitting grooves are arranged at equal intervals in the circumferential direction with respect to the tangential direction. Both ends of the roller rolling on the inclined bottom surface are provided by providing concave notches having inclined bottom surfaces, and notches at positions corresponding to the concave portions at equally spaced circumferential positions of the ring fitted in the fitting groove. Part is fitted in the notch, and a pin inserted in the hollow part of the roller is installed between both recesses to allow the roller to roll on the inclined bottom surface, and the roller is placed at a shallow position on the inclined bottom surface. There has been proposed one formed so as to be frictionally coupled to the inner surface of the winding core at a certain time (JP-A-2-13445).

[0004]

However, in the case of the core support device proposed above, two rings are provided with a space therebetween, a roller which is a rolling element is provided between the rings, and the roller is pulled out. Since the pin to prevent this is installed between both rings, the width of the roller is smaller than the width of the collar body, and the contact width with the inner surface of the core is reduced accordingly. There is a drawback that requires power. Further, providing the two rings as described above and providing the notches on the opposite sides thereof complicates the processing, and also has the drawback of increasing the number of parts and increasing the cost.

Further, a plurality of the supporting devices of the above-mentioned collar are arranged in parallel with the rotary drive shaft, and a hollow core such as a paper tube is externally fitted to the rotary drive shaft. When the collar is rotated with the drive shaft, when the rotation starts,
The roller held by the ring rotates relative to the collar due to the friction with the winding core, the roller moves from the deep position of the inclined bottom surface to the shallow position and protrudes outward, and the inner surface of the winding core is rubbed with the collar and the winding core. However, due to an error in the inner diameter of the core such as a paper tube, a gap is created between the rolling element and the core in a certain part of the core supporting device, and the friction is small. There is a possibility that the rolling element held by the ring slides on the inner surface of the winding core or rotates with the collar and cannot move from the deep position of the inclined bottom surface to the shallow position, so that frictional coupling is not performed. If the sheet belt is rotated without partial frictional coupling, the sheet strip to be wound may be wavy or distorted, so that the sheet cannot be wound neatly.

In particular, when winding a wide sheet strip, the above-mentioned color type core supporting device is provided with a space at several places such as both ends of the core such as a paper tube and a central portion between them. When placed, such problems are likely to occur.

The present invention has been made in view of the above, and a first object thereof is to allow the width of the rolling elements to be larger than the width of the collar body, and to rotate the collar in a paper tube or the like. The present invention provides a core support device that can be efficiently transmitted to the core, and has a small number of parts, which can be easily manufactured and provided at low cost. Provided is a core support device capable of reliably frictionally coupling a rolling element to a core such as a paper tube.

[0008]

In the core support device of the present invention for solving the above-mentioned problems, a collar main body provided so as to be able to transmit rotation to a rotary drive shaft, a paper tube externally inserted in the collar main body, and the like. And a means for transmitting the rotation of the collar main body to the hollow core of (1), which constrains the externally mounted core in one rotation direction to rotate the core and rotates the outer circumference of the collar main body. Direction groove is formed, an annular ring is rotatably fitted in the groove, and a plurality of recessed portions are provided at equal intervals in the circumferential direction on the side portions of the groove. The bottom surface is inclined with respect to the tangential direction so that one end side in the circumferential direction becomes shallower, and the annular ring is opened at the circumferentially equidistant positions corresponding to the recessed portions at a width narrower than the inner portion to the outer circumference. A notch is provided, and the notch rolls on the inclined bottom surface. Body and fitted so as to be partially protrude from said openings, rolling elements, characterized in that to engage the core inner surface rolling element protrudes from the opening of the notch when in the shallow position of the inclined bottom.

Further, in the above-described core support device, means for elastically pressing the inner surface of the paper core by spring means are provided at circumferentially equidistant positions of the annular ring.

[0010]

In the above-described core support device of the present invention, when a hollow core such as a paper tube is externally inserted into the core support device, it is in contact with the rolling element held by the annular ring on the outer periphery of the collar body and the outer periphery of the ring. become. When the collar body is rotated together with the rotary drive shaft while the seat belt is stopped on the winding core in this state to provide the rotation resistance, the ring is retained by the friction resistance due to the contact between the rolling element held by the ring and the inner surface of the winding core. The collar body will rotate without rotating, and along with this, the rolling element will move from the deep position of the recess to the shallow position, and will be in a state of protruding from the opening of the notch on the outer circumference of the ring. , The rolling element strongly presses against the inner surface of the winding core to frictionally bond.
In this state, the outer winding core rotates together with the collar body via the ring and the rolling element, and winding or unwinding is performed. Further, when the collar body is rotated in the opposite direction, the rolling element moves to a deep position, the frictional coupling between the rolling element and the winding core is loosened, and the winding core can be pulled out in the axial direction.

However, the rolling element is held by being inserted into a notch portion having a width narrower than the inner portion of the ring and opening to the outer periphery so as to be able to partially project from the opening. No means for preventing disengagement is required, the number of parts is small, and the assembly structure is easy. Moreover, since it is held by the ring in the center and both ends of the ring are rollably provided on the inclined bottom surfaces of the recesses on both sides, the axial width of the rolling element is smaller than that of the outer circumference of the collar body. Therefore, the friction resistance between the rolling element and the inner surface of the winding core at the time of protrusion becomes large, and the winding core can be surely frictionally engaged with each other, so that rotation transmission can be efficiently performed.

Further, when the means for elastically pressing against the inner surface of the paper tube by the spring means are provided at the circumferentially equidistant positions of the annular ring as described in claim 2, it is supposed that an error in the inner diameter of the winding core occurs. Even when the rolling element held by the ring cannot contact the inner surface of the winding core due to partial bending or the like, the elastic body is pressed against the inner surface of the winding core by the elastic pressing contact, so that only the collar body rotates at the start of rotation. Then, the rolling element held by the ring can be reliably moved to a shallow position on the inclined bottom surface, the frictional engagement between the rolling element and the inner surface of the winding core is surely performed, and the rolling element is prevented from idling.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.

The figure shows an embodiment of the winding device,
(1) shows a color type core support device provided on the outer periphery of the rotary drive shaft (2). This core support device (1) has a hollow body, such as a paper tube, on which the rotation of the collar body (3) is inserted, on the outer periphery of the collar body (3) which is externally inserted so as to be capable of transmitting rotation to the rotary drive shaft (2). And means for transmitting it to the winding core (a), and is configured to rotate the winding core (a) while constraining the winding core (a) in one rotation direction, and winding up the sheet band (b) slit to an arbitrary width. The collar body (3) is arranged at required intervals in the axial direction of the rotary drive shaft (2), for example, and is rotationally transmitted by friction means described later.

The means for transmitting the rotation of the color body (3) to the winding core (a) such as a paper tube to be inserted has the following construction.

An annular ring (5) is rotatably fitted in a circumferential groove (6) provided on the outer periphery of the collar body (3). (7) (7) are recessed portions provided on both sides of the circumferential groove (6), which are located at equal intervals in the circumferential direction.
It is formed slightly longer in the circumferential direction at the location. The bottom surfaces (8) and (8) of the recessed portions (7) and (7) are formed so as to be inclined with respect to the tangential direction of the collar body (3) so that one end side in the circumferential direction becomes shallow. This inclined bottom (8) (8)
The height difference is set according to the diameter of a rolling element (9) such as a roller described later, and is set to about 1 to 4 mm.

Numerals (51) and (51) are a pair of half halves having a semi-annular shape which form the ring (5), and are fitted into the groove (6) and are coupled to each other. As shown in FIG. 5, the half-divided bodies (51) (51) are provided with screw holes (52) whose one end is opened to the divided end face and the other end is opened to the outer periphery,
The screw (5) is inserted in the screw hole (52) while being fitted in the groove (6).
By screwing 3) together, both half halves (51) are joined together.

The ring (5) is provided at circumferentially equidistant positions (4 locations) corresponding to the recessed portions (7) and (7) on both sides, and has a width narrower than that of the inner portion on the outer circumference. A notch (4) that opens is provided. This notch (4)
A roller-like rolling element (9) is inserted into the opening (41) so as to partially project from the opening (41) and is retained so as not to be removed. Both ends of the rolling element (9) are provided with the recessed portions on both sides. It is provided so as to fit on (7) and roll on the inclined bottom surface (8). That is, when the ring (5) rotates relative to the collar body (3), the rolling elements (9) fitted and inserted in the notches (4) of the ring (5) are simultaneously recessed (7) ( The inclined bottom surfaces (8) and (8) of 7) are adapted to roll.

This rolling element (9) has a deep position (8a) on the inclined bottom surface (8) (8) during normal operation such as when the winding core (a) is externally inserted.
In this case, the cutout portion (4) is held so as to barely or slightly protrude from the opening (41), and when moved to the shallow position (8b), protrudes outward from the opening (41). In this state, the inner surface of the core (a) that has been externally inserted is pressed from the inside, and this pressing force frictionally connects the core (a). In order to securely hold the rolling element (9) at the deep position (8a) of the inclined bottom surface (8), the magnet (10) is embedded in the circumferential end surface of the recessed portion (7) to roll the rolling element (9). It is desirable to hold 9).

Circumferentially equidistant positions of the ring (5),
For example, as shown in the figure, the notch (4) for holding the rolling element (9)
At a position near the pin (1) elastically pressed against the inner surface of the winding core (a) by the spring means (11) embedded inside.
2) is provided so as to allow the axial insertion and removal of the winding core (a) and prevent the ring (5) from spinning around the winding core (a) at the start of the rotation. There is.

That is, the inner surface of the core (a) such as a paper tube has an inclined bottom surface (8) with respect to the inner surface of the externally inserted core (a) due to manufacturing errors and partial bending. Deep position (8a)
When the rolling element (9) in FIG. 2 cannot contact with the frictional resistance, the ring (5) rotates together with the rotation of the collar body (3), so that the rolling element (9) has a recess (7). This means that the inclined bottom surface (8) cannot roll and cannot move to the shallow position (8b). However, as described above, the spring means (1
If a pressing means such as a pin (12) that elastically presses according to 1) is provided, friction resistance can be applied to the core (a), and therefore slippage occurs on the core (a). Without doing so, the ring (5) rotates relative to the collar body (3), and the rolling element (9) surely moves to the shallow position (8b).

The tip of the pin (12) serving as the pressing means is rounded so that the core (a) of the paper tube or the like can be easily extrapolated. As the pressing means, in addition to using the pin (12) as described above, a leaf spring is attached to the outer circumference of the ring, and the leaf spring itself serves as the pushing means for the core (a) of the paper tube or the like. Can be used. However, when the winding core is a paper tube or the like, paper powder may be generated by contact with the leaf spring during the external insertion operation, so a pin or ball with a rounded tip as in the illustrated embodiment is used. Is desirable.

The core support device having the above-described structure is used to form a winding shaft in the winding device, and as shown in FIG. 2, it is arranged in the axial direction of the rotary drive shaft (2). Place at the required intervals and extrapolate. At this time, the core bodies of the respective core support devices (3) and (3) are fitted into a predetermined position via an annular spacer. Also the color body (3)
Between the inner circumference of both ends of the rotary drive shaft (2) and the bearing (1
5) is installed.

The friction coupling means for transmitting the rotation of the rotary drive shaft (2) to the collar body (3) has the following construction.

Reference numeral (21) is an air pressure passage provided in the axial direction inside the rotary drive shaft (2), and (22) is a rotary drive shaft (2).
Are pressure holes provided at equal intervals (for example, 90 ° angle as shown in the figure) on the same circumference, and penetrate the outer peripheral surface of the rotary drive shaft (2) from the air pressurizing passage (21). Also this 4
The individual pressing holes (22) are provided at each mounting position of the collar main body (3) with an interval of 45 degrees while being axially spaced. (23) is a cylindrical pressing member that slides inside the pressing hole (22), the tip of which is formed in a hemispherical shape, and the packing material (24) is fitted to the outer peripheral surface. In order to rotationally connect the rotary drive shaft (2) and the collar main body (3), high-pressure air is sent into the air pressurizing passage (21) to press the pressing member (2).
The tip of 3) slightly protrudes from the outer peripheral surface of the drive shaft (2) to press the inner surface of the collar main body (3), and they are joined by friction. This coupling force can be adjusted by air pressure, and when the high pressure air is released, it is not pressed against the collar body (3) of the pressing member (23) and the frictional connection is released.

Then, a case will be described in which the sheet core (a) such as a paper tube is externally attached to the outside of the core support device (1) to wind up the sheet band (b).

First, in the state shown by the solid line in FIG. 5, the rolling element (9) made of rollers or the like is located at the deep position (8a) of the inclined bottom surface (8) of the recessed portion (7) and the cutout portion (8). It does not project outward from the opening (41) of 4), or even if it projects, it is very small. Therefore, the winding core (a) can be extrapolated in the axial direction without difficulty. At this time, the pin (12) serving as a pressing means using the spring means (11).
Is the spring means (11) due to the pressing force by the extra insertion of the winding core (a).
Since it retracts elastically against the above, the above-described core extrapolation action can be easily performed without any problems.

Then, the end of the sheet band (b) is stopped on the winding core (a) to give a rotation resistance, and together with the rotation drive shaft (2),
When the collar body (3) is turned in the direction of the arrow, the pin (12) is pressed against the inner surface of the core by friction between the core (a) and the four rolling elements (9) in contact with the core (a) or by spring means.
Friction causes the ring (5) not to rotate, only the collar body (3) rotates, the rolling element (9) moves to the shallow position (8b) of the inclined bottom surface (8), and the radial direction from the opening (41). And is strongly pressed against the inner surface of the core (a) such as a paper tube and frictionally coupled to the inner surface of the core. After that, the winding core (a) rotates together with the ring (5) in synchronization with the collar body (3), and the winding is performed.

When the collar body (3) is reversely rotated with respect to the ring (5), the rolling element (9) moves to the deep position (8a) of the inclined bottom surface (8) and retreats from the opening (41). Since the frictional engagement with the inner surface of the core (a) is released by inserting the core (a), the core (a) can be easily removed.

As shown in FIG. 6, the means for transmitting the rotation by the ring (5) and the rolling elements (9) on the outer periphery of the collar body (3) has a required interval in the axial direction at both ends. It is also possible to provide and implement.

In the above embodiment, the case where the winding core is supported by the winding shaft has been described, but the present invention can be used in the same manner as above to form the unwinding shaft of the unwinding device.

Also, it can be used in the same manner when supporting only the both ends of the winding core so that the rotation can be transmitted. Further, as means for transmitting the rotation of the rotary drive shaft to the collar body, the above-mentioned high pressure air is used. The collar body (3) is not limited to the one that uses frictional coupling, but the collar main body (3) can be fixedly coupled to the rotary drive shaft.

[0033]

In the core support device of the present invention described above, the rolling element held by the ring is recessed due to the rotation of the collar main body in a state in which the externally inserted core is provided with rotation resistance. Make sure to move from the deep position to the shallow position of the inclined bottom surface of
Part of the rolling element is in a protruding state, and the rolling element strongly frictionally engages with the inner surface of the winding core, so that the rotation transmission from the collar body to the winding core is reliably performed, and the sheet band is accurately wound or unwound. be able to.

In particular, the rolling element, which is a member for transmitting the rotation, is retained by being inserted into a notch portion having a width narrower than the inner portion of the ring and opening to the outer periphery so as to be able to project from the opening. Further, it does not require any other constituent means for preventing removal, the number of parts is small, the assembling structure is easy, and the manufacturing cost is low. Moreover, since it is held by the ring in the center and both ends of the ring are rollably provided on the inclined bottom surfaces of the recesses on both sides, the width of the rolling element in the axial direction can be made large, and therefore, when it is projected. The frictional resistance between the rolling element and the inner surface of the winding core is increased, and the winding core can be securely frictionally coupled,
Rotation can be transmitted efficiently.

Further, when the means for elastically pressing against the inner surface of the core by the spring means is provided at the circumferentially equidistant positions of the annular ring as in the second aspect, an error in the inner diameter of the core is temporarily assumed. Even when the rolling element held by the ring cannot contact the inner surface of the winding core due to partial bending or the like, the elastic body is pressed against the inner surface of the winding core by the elastic pressing contact, so that only the collar body rotates at the start of rotation. As a result, the rolling element held by the ring can be reliably moved to a shallow position on the inclined bottom surface, frictional engagement between the rolling element and the inner surface of the winding core is reliably performed, and the sheet is wound without idling. There is no fear that the belt will wavy.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view of an assembled state in which the rotary drive shaft is mounted.

FIG. 3 is an enlarged vertical sectional view of a main part.

FIG. 4 is a transverse sectional view of the ring portion of the above.

FIG. 5 is a cross-sectional view of an inclined bottom surface portion of the above.

FIG. 6 is a perspective view showing another embodiment.

[Explanation of symbols]

(A) Core (B) Seat belt (1) Core support device (2) Rotary drive shaft (3) Color body (4) Notch (41) Opening (5) Ring ring (6) Circumferential groove (7) Recessed part (8) Sloped bottom (8a) Deep position (8b) Shallow position (9) Rolling element (10) Magnet

Claims (2)

[Claims] 1. A collar main body provided so that rotation can be transmitted to a rotary drive shaft, and means for transmitting the rotation of the collar main body to a hollow core such as a paper tube externally inserted in the collar main body. A core supporting device for restraining and rotating the formed core in one rotation direction, wherein a circumferential groove is formed on the outer periphery of the collar body, and an annular ring is rotatably fitted in the groove. Further, a plurality of recessed portions are provided at equal intervals in the circumferential direction on the side portions of the groove, and the bottom surface of the recessed portions is inclined so that one end side in the circumferential direction becomes shallower with respect to the tangential direction, and The annular ring is provided with notches that are narrower than the inner part and open to the outer periphery at circumferentially equidistant positions corresponding to the recesses, and the notches have rolling elements that roll on the inclined bottom surface. When it is inserted so that it can partially protrude from the opening and the rolling element is at a shallow position on the inclined bottom surface The core support device, wherein the rolling element projects from the opening of the notch and engages with the inner surface of the core. 2. The core support device according to claim 1, wherein means for elastically pressing the inner surface of the core by spring means are provided at circumferentially equidistant positions of the annular ring.