JPH1179486A - Core chucking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly fit/insert it when a core is externally inserted, and improve engaging force to a core inside surface at chucking time by pressing a wheel-shaped rotary body to the inside of a core, and rotating it only in the shaft direction of an annular ring. SOLUTION: A wheel-shaped rotar 12 resiliently pressed to an inside surface of a core (a) by a spring means 11 embedded inside, is arranged in a circumferential directional equal interval position of an annular ring 5, for example, a vicinity position of a notch part to hold a rolling element. Here, the rotar 12 presents a perforated short column shape, and is rotatably and pivotally fixed by a central shaft 12a, and rotates in the shaft direction of the annular ring 5, that is, only in the inserting/extracting direction of the core (a) since the central shaft 12a is arranged in parallel to the tangent direction of the annular ring 5. Therefore, the externally inserting and extracting action in the shaft direction of the core (a) is facilitated, and the annular ring 5 can be prevented from idly rotating to the core (a) at rotation starting time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device for slitting a sheet band such as paper, cloth, synthetic resin film or metal foil into an arbitrary width, and a core chuck device for an unwinding device. It is about.

[0002]

2. Description of the Related Art In a winding apparatus for a sheet band, a collar provided so as to be integrally rotatable by a frictional coupling or the like with a rotary drive shaft for winding, and a hollow such as a paper tube externally inserted into the collar. There have been many proposals that have a means for transmitting the rotation of the collar to the core, and rotate the extrapolated core in one rotation direction.

[0003] As means for transmitting the rotation of the collar to the winding core, a rolling element is mounted on a plurality of recessed portions having an inclined bottom surface provided on the outer periphery of the collar, and the rolling element is placed at a shallow position on the inclined bottom surface. It is general that the core is frictionally coupled to the inner surface of the core at a certain time.

Specifically, for example, as shown in FIG. 8, a circumferential groove 6 is formed on the outer peripheral portion of the collar body 3, and the annular ring 5 is rotatably fitted into the groove 6, and furthermore, A plurality of recessed portions 7 are provided at equal intervals in the circumferential direction on the side of the groove 6, and the bottom surface of the recessed portion 7 is inclined such that one end in the circumferential direction becomes shallower with respect to the tangential direction. The annular ring 5 is provided with a notched portion 4 which is narrower than the inner portion and is open to the outer periphery at circumferentially equal intervals corresponding to the concave notched portion 7, and the notched portion 4 rolls the inclined bottom surface. Rolling element 9
When the rolling element 9 is located at a shallow position on the inclined bottom surface, the rolling element 9 projects from the opening 41 of the cutout 4 and engages with the inner surface of the core a. There is a core chuck device. In this core chuck device, as shown in the figure, a pressing means for elastically pressing the pin 12 'against the inner surface of the core a by the spring means 11 at the circumferentially equal position of the annular ring 5. Forming a mechanism.

That is, in the above-mentioned core chuck device, a hollow core a such as a paper tube is extrapolated into the collar main body 3 and a sheet band is fixed to the core a to provide rotational resistance. When the collar body 3 is rotated, the collar body 3 rotates without rotating due to the frictional resistance between the pin 12 'of the pressing mechanism formed on the annular ring 5 and the inner surface of the core a. As a result, the rolling element 9 moves from the deep position of the recessed portion 7 to the shallow position, and projects from the opening 41 of the cutout 4 on the outer periphery of the ring 5. 9 strongly presses against the inner surface of the core a to perform frictional coupling. In this state, the core a
Is rotated together with the collar body 3 via the rolling elements 9 to be wound or unwound. When the collar body 3 is rotated in the reverse direction, the rolling element 9 moves to a deep position of the concave portion 7 to loosen the frictional connection between the rolling element 9 and the core a, and the core a is pulled out in the axial direction. be able to.

[0006]

[Problems to be solved by the invention]

However, in the above-described conventional pressing mechanism,
Since the pin is biased and pressed against the inner surface of the core, the protruding pin is easily hooked on the end surface of the core tube when the core is extrapolated to the collar body, and the core is further pulled out. Sometimes, there is a problem that this pin is hard to get inside the core and hard to come out. There is a problem that the engaging force with respect to the inner surface of the core is reduced.

According to the present invention, by coping with the above-described situation and finding a novel structure of the pressing mechanism, the core can be inserted and removed satisfactorily, and the engaging force with respect to the inner surface of the core is determined. The purpose is to maintain the level of

[0009]

That is, the feature of the core chuck device of the present invention which meets the above-mentioned object is that an annular ring is rotatably provided on the outer peripheral portion of a collar body into which a hollow core is inserted. A core chuck formed with engaging means for engaging with the collar body by rotating the collar body and for moving outward in a radial direction to press and support the inner surface of the core while being fitted and inserted into the annular ring. In the device, a plurality of press-contact mechanisms for urging and pressing the wheel-shaped rotating body against the inner surface of the winding core are formed at predetermined intervals in the circumferential direction on the outer peripheral portion of the annular ring, and this rotating body is formed. It is provided that the annular ring can be rotated only in the axial direction.

[0010]

In the core chuck device of the present invention, the wheel-shaped rotating body is urged against the inner surface of the core, and the rotating body is axially inserted into the annular ring, that is, the core is inserted. Since the core rotates only in the removal direction, the end surface and inner surface of the core are guided smoothly by this rotating body when the core is extrapolated, and the core is smoothly inserted and inserted. On the other hand, the rotating body does not rotate, thereby increasing the engaging force with respect to the inner surface of the core, and furthermore, at the time of pulling out the core, even if the rotating body is stuck in the inner surface of the core, the wheel-shaped rotating body does not bite. By pulling over by rotating and guiding the inner surface of the winding core, the pulling-out can be performed very easily.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the present invention will be described.

FIG. 1 is a sectional view showing a core chuck device according to an embodiment of the present invention, FIG. 2 (A) is a plan view showing a pressing mechanism of the device, and FIG. 2 (B) is an axial sectional view thereof. FIG. 3B is a cross-sectional view orthogonal to the axis, FIG. 3A is a plan view of FIG.
FIG. 4 is an exploded perspective view of the core chuck device, and FIG. 5 is a perspective view of the same.

The core chuck device of this embodiment has a collar body 3 which is externally inserted so as to be able to transmit rotation to the rotation drive shaft 2.
And means for transmitting the rotation of the collar body 3 to a core a, such as a paper tube, which is externally inserted. The core a is restricted in one rotation direction and rotated. The collar body 3 is configured to wind up a sheet band b (see FIG. 7) slit to an arbitrary width. The rotation is transmitted.

On the other hand, the means for transmitting the rotation of the collar body 3 to the core a has the following configuration.

An annular ring 5 is rotatably fitted in a circumferential groove 6 provided on the outer periphery of the collar body 3.
Reference numerals 7 denote recessed portions provided on both sides of the circumferential groove 6, and are formed slightly longer in the circumferential direction at four positions at circumferentially equal intervals. The bottom surface of the recess 7 is formed so as to be inclined so that one end in the circumferential direction becomes shallower with respect to the tangential direction of the collar body 3. The height difference of the inclined bottom surface 8 is
It is set according to the diameter of a rolling element 9 such as a roller, which will be described later.
It is set to about 4 mm.

Reference numeral 51 denotes a pair of halves forming a semi-annular shape forming the above-mentioned annular ring 5, which are fitted into the grooves 6 and are mutually connected. As shown in FIG. 4, the half body 51 has a threaded hole 5 having one end opened to the divided end face and the other end opened to the outer periphery.
The two halves 51 are connected by screwing a screw 53 into a screw hole 52 in a state fitted in the groove 6.

The annular ring 5 has circumferentially equidistant positions (four places) corresponding to the concave portions 7 on both sides.
Are provided with cutouts 4 each having a width smaller than the inner part and opening to the outer periphery. A roller-shaped rolling element 9 is inserted into the notch 4 so as to be able to partially protrude from the opening 41 and is held undetachably. Both ends of the rolling element 9 are fitted into the concave notches 7 on both sides. It is provided so that it may roll on the inclined bottom surface 8 in combination. That is, when the annular ring 5 rotates relative to the collar body 3, the rolling elements 9 fitted in the cutouts 4 of the ring 5 simultaneously roll on the inclined bottom surfaces 8 of the concave cutouts 7. Has become.

The rolling element 9 is located at a deep position 8a of the inclined bottom surface 8 at the time of normal operation such as extrapolation of the core a.
Is held in a state where it hardly projects or slightly projects from the opening 41, and when it moves to the shallow position 8b, it projects outward from the opening 41 so that the inner surface of the inserted core a It is pressed and frictionally coupled with the core a by this pressing force. In order to reliably hold the rolling element 9 at the position of the deep position 8a of the inclined bottom surface 8, as shown in FIG. 7, a magnet 10 is embedded in the circumferential end face of the concave notch 7 to hold the rolling element 9. It is desirable to make.

On the other hand, as shown in FIGS. 1 to 3, the pressing mechanism, which is an essential part of the present invention, holds the annular ring 5 at equal circumferential positions, for example, the rolling elements 9 as shown in FIG. A wheel-shaped rotator 1 elastically pressed against the inner surface of the core a by a spring means 11 embedded in a position near the notch 4.
2 to facilitate the extrapolation and withdrawal of the core a in the axial direction.
Is prevented from idling with respect to the core a.

The rotating body 12 has a short cylindrical shape with a hole and is rotatably mounted on a center shaft 12a.
The shaft 12a is arranged in parallel to the tangential direction of the annular ring 5, so that the shaft 12a rotates only in the axial direction of the annular ring 5, that is, in the insertion / removal direction of the core a.

As shown in FIGS. 2B and 3B, a shaft 12a for pivotally supporting the rotating body 12 is
Is rotatably disposed between an upper portion of a sleeve S embedded in the sleeve S and a receiver U slidable in the sleeve S and urged by a spring means 11, and a rotating body 12 , And descends together with the receiver U.

That is, in the core chuck device of the present invention, the wheel-shaped rotating body 12 is urged against the inner surface of the winding core a, and the rotating body 12 is moved in the axial direction of the annular ring 5. That is, since the core a is rotated only in the insertion / removal direction, when the core a is externally inserted or pulled out, the end surface or the inner surface of the core a is guided by the rotating body 12 and smoothly inserted. Is performed, and at the time of chucking, the rotating body 12 is rotated in the rotational direction of the annular ring 5.
Does not rotate, which makes it possible to easily obtain a desired engagement force with the inner surface of the winding core. In particular, in pulling out the core a, even when the rotating body 12 is stuck in the inner surface of the core a, the wheel-shaped rotating body 12 rotates so as to get over the biting, and furthermore, the inner surface of the core is further removed. Since the guide is provided by this rotation, the pull-out difference work becomes extremely easy.

On the other hand, the core chuck device having the above structure is used for forming a winding shaft in a winding device. As shown in FIGS. Extrapolate at the desired spacing in the axial direction. At this time, an annular spacer is interposed in the collar body 3 of each core chuck device and fitted into a predetermined position. A bearing 15 is provided between the inner periphery of both ends of the collar body 3 and the rotary drive shaft 2.

The means for frictional coupling for transmitting the rotation of the rotary drive shaft 2 to the collar body 3 has the following configuration. Reference numeral 21 denotes an air press-fitting passage provided in the axial direction inside the rotary drive shaft 2, and 22 denotes pressing holes provided at equal intervals (for example, at a 90 ° angle as shown in the figure) on the same circumference of the rotary drive shaft 2. And penetrates from the air pressure passage 21 to the outer peripheral surface of the rotary drive shaft 2. The four pressing holes 22 are provided at each mounting position of the collar main body 3 at an angle in the axial direction by being shifted at an angle of 45 °. Reference numeral 23 denotes a cylindrical pressing member that slides inside the pressing hole 22, the tip of which is formed in a hemispherical shape, and a packing material 24 is fitted on the outer peripheral surface.

In order to rotationally connect the rotary drive shaft 2 and the collar body 3, high-pressure air is sent into the air press-in passage 21, and the tip of the pressing member 23 slightly projects from the outer peripheral surface of the drive shaft 2, and the inner surface of the collar body 3 Are pressed and joined by friction. This coupling force can be adjusted by air pressure, and when the high-pressure air is released, the pressing member 23 does not press against the collar body 3,
The frictional connection is released.

Next, the case where the core a such as a paper tube is extrapolated outside the core supporting device 1 and the sheet band b is wound will be described.

First, in the state shown by the solid line in FIG. 7, the rolling element 9 composed of a roller or the like is located at a deep position 8a of the inclined bottom surface 8 of the concave notch 7, and projects outward from the opening 41 of the notch 4. It is either not present or very slight even if it protrudes. When the core a is extrapolated, the wheel-like rotating body 12 of the pressing mechanism using the spring means 11 is pressed from the end face of the core a by the pressing force by the extrapolation of the core a. , And the rotation of the rotating body 12 guides the core in the insertion direction, so that the above-described extrapolation of the core a can be performed extremely easily.

When the end of the sheet band b is stopped on the core a to provide rotational resistance, and the collar body 3 is rotated together with the rotary drive shaft 2 in the direction of the arrow, the core a is pressed against the inner surface of the core. Further, due to the friction with the rotating body 12 that does not rotate in the rotation direction of the ring 5, only the collar body 3 rotates without rotating the ring 5, whereby the rolling element 9 moves to the shallow position 8b of the inclined bottom surface 8 and It projects radially from the opening 41, is strongly pressed against the inner surface of the core a, and is frictionally coupled to the inner surface of the core. after that,
The core a rotates together with the ring 5 in synchronization with the collar main body 3 to perform winding.

When the collar body 3 is rotated in the reverse direction 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 to engage with the inner surface of the core a. Since the union is released, the core a can be pulled out. In this case, since the rotating body 12 is rotatable in the pulling-out direction of the core a and is wheel-shaped, even if the core is hardly inserted into the inner surface of the core due to centrifugal force or the like, this biting is performed. , And the rotation guides the inner surface of the core, thereby making it extremely easy to pull out the core a. that's all,
Although the embodiment of the present invention has been described for the case where the winding core is supported by the winding shaft, the present invention can also be used in the same manner as described above to configure the unwinding shaft of the unwinding device.

[0030]

As described above, in the core chuck device of the present invention, an annular ring is rotatably fitted to the outer peripheral portion of the collar body into which the core is inserted, while the annular ring is inserted. In the core chuck device, the engagement means for engaging with the collar body by the rotation drive of the collar body and moving in the radial direction to press and support the inner surface of the core is formed. At predetermined intervals in the circumferential direction, a plurality of pressing mechanisms for urging and pressing the wheel-shaped rotating body against the inner surface of the core are formed, and the rotating body is rotated only in the axial direction of the annular ring. The wheel-shaped rotating body is urged against the inner surface of the core, and the rotating body is rotated only in the axial direction of the annular ring, that is, in the inserting / removing direction of the core. As a result, when extrapolating the core, the core The end surface and the inner surface are guided by this rotating body to smoothly insert and insert, and at the time of chucking, the rotating body does not rotate in the rotating direction of the annular ring, so that the engaging force on the inner surface of the winding core is increased, and When the core is pulled out, even if the rotating body is stuck in the inner surface of the winding core, the wheel-shaped rotating body can easily overcome this biting by rotation and guide the inner surface of the winding core to make the above-mentioned extraction extremely easy. Has a remarkable effect.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a core chuck device according to an embodiment of the present invention.

FIG. 2A is a plan view showing a pressing mechanism of the apparatus. (B) It is an axial sectional view.

3A is a plan view of FIG. 3B. FIG. (B) It is an axis orthogonal cross section of a pressing mechanism.

FIG. 4 is an exploded perspective view of the core chuck device.

FIG. 5 is a perspective view of the same.

FIG. 6 is an axial sectional view showing the movement of a rolling element.

FIG. 7 is a cross-sectional view orthogonal to the axis.

FIG. 8 is a sectional view showing a conventional core chuck device.

[Explanation of symbols]

 a core b sheet band 1 core support device 2 rotary drive shaft 3 collar body 4 cutout 41 opening 5 annular ring 6 circumferential groove 7 concave notch 8 inclined bottom surface 8a deep position 8b shallow position 9 rolling element 10 Magnet 11 spring means 12 wheel-shaped rotating body 12a pivot shaft

Claims (1)

[Claims] An annular ring is rotatably fitted around the outer periphery of a collar body into which a hollow core is inserted, and the collar body is inserted into the annular ring by rotating the collar body. In the core chuck device having an engaging means for engaging and moving in a radially outward direction to press and support the inner surface of the core, the wheel-shaped chuck device is provided with a predetermined interval in a circumferential direction on an outer peripheral portion of the annular ring. A plurality of pressing mechanisms for urging the rotating body against the inner surface of the winding core to press the rotating body, and enabling the rotating body to be rotatable only in the axial direction of the annular ring. apparatus.