JP2791552B2 - Core chuck device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaftless chuck device for holding a core tube in a winding machine.

[0002]

2. Description of the Related Art A conventional core chuck device for a slitter, for example, inserts a body 20 of a chuck 19 which can be opened and closed right and left into a core tube C as shown in FIG. (Not shown), and the lug is pressed against the inner diameter of the core tube C to chuck the core tube C.

[0003] That is, in the conventional chuck device, since for accommodating the lugs projecting system inside the chuck barrel 20, a problem that the length L ₁ of the chuck body portion 20 is longer occurs.

When such a chuck device is adopted as a slitter winding device which cuts a wide web into a plurality of narrow webs, separates the web into a strip and winds it, for example, it interferes with an adjacent chuck device. without the width direction of the length L ₂ required for deployment inevitably becomes large. This leads to a restriction on the minimum cutting width of the slitter, and the minimum width of the slitter is currently limited to about 400 mm.

[0005]

SUMMARY OF THE INVENTION On the other hand, the applicant of the present application
To cope with such circumstances, Japanese Patent Application No. 7-328357 proposes a core chuck device. This chuck device can solve the above-mentioned conventional problems well. This leaves room for improvement in that slippage occurs.

The present invention is an improvement of the above-mentioned core chuck device. By shortening the core holding mechanism, the required installation width of the chuck device is reduced and the core chuck is more reliably performed. The purpose is to do so.

[0007]

That is, the feature of the core chuck device of the present invention is that a pair of flange portions arranged side by side with a predetermined gap in the axial direction are provided at the tip of the chuck shaft.
A ring-shaped intermediate element rotatably fitted to the chuck shaft in the gap, a plurality of segments arranged so as to substantially equally circumscribe the outer periphery of the intermediate element, and each of these segments in the axial direction of the chuck axis; And a plurality of long grooves formed in pairs with each of the flange portions, and slidably fitted at both ends of the studs respectively. Forming a plurality of fitting projections extending radially outward toward the segments, forming fitting recesses for slidably inserting the fitting projections in the respective segments, forming the respective long grooves of the flange portion,
One end is formed at an inclination in the same direction that extends obliquely toward the outer periphery of the flange portion, and urges the meson toward the inner peripheral end portion of each of the long grooves. When it moves outward, it comes into contact with the inner diameter of the core to form a non-slip member that prevents slippage of each segment and the core.

In the above-mentioned core chuck device of the present invention, the anti-slip member is constituted by a protrusion which abuts so that its tip bites into the inner diameter of the core, or friction with the inner diameter of the core. It is also possible to use a rubber or synthetic resin layer that increases the force.

[0009]

The core chuck device of the present invention is, for example, shown in FIGS.
When the core tube is chucked, each segment 6 shown in FIGS. 1 and 2 is inserted into the end of the core tube, and the intermediate shaft 5 is attached to the chuck shaft 1. The winding torque is transmitted in the same direction as the biasing direction.

In each segment 6 before the winding torque is applied, the rotation of the intermediate element 5 is prevented because the intermediate element 5 is biased toward the inner peripheral end 8a of the long groove 8 as shown in FIG. Each stud 7 transmitted through the fitting projection 9 and the segment 6 is also offset toward the inner peripheral end 8a of the long groove 8, whereby the segment 6 in which the stud 7 is provided penetrates. It is in the position where it fits.

On the other hand, when a winding torque is applied to the chuck shaft 1, the meson 5 temporarily reversely rotates against the flange portions 3 and 4 which rotate integrally with the chuck shaft 1, as shown in FIG. The stud 7 is moved to the outer peripheral end 8b of the long groove 8 via the fitting projection 9 and the segment 6 as described above. As a result, the stud 7 moves each segment 6 so as to expand the outer diameter as shown in FIG.
The non-slip member 17 of the segment 6 is pressed against the inner diameter of the segment 6 and chucked. In this case, in the chuck device according to the second aspect of the present invention, it is possible to prevent the core from slipping at the time of chucking by abutting the projection of each segment so as to bite into the inner diameter of the core tube. In the chuck device according to the third aspect, the core can be prevented from slipping by the frictional force of the rubber layer or the like of each segment, whereby the core can be reliably chucked. Become.

[0012]

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

FIG. 1 is a side view showing a chuck device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a sectional view taken along line BB of FIG. 4, and FIG. FIG. 2 is a sectional view taken along the line AA of FIG.

The chuck device of the above-described embodiment uses the structure shown in FIG. 1 in a pair of right and left. As shown in FIG.
And flange portions 3 and 4 arranged in parallel with each other, and FIG.
As shown in FIG. 3, a ring-shaped intermediate member 5 rotatably fitted to the chuck shaft 1a in the gap 2 and a circumferential portion surrounding the outer periphery of the intermediate member 5 equally as shown in FIG. The six segments 6 arranged above and, as shown in FIG.
As shown in FIGS. 2 and 3, each of the studs 7 is formed on the inner surface of each of the flange portions 3 and 4 in pairs.
And 12 pairs of long grooves 8 for slidably inserting the opposite ends thereof.

As shown in FIG. 3, the flanges 3, 4 on the distal end side of the chuck shaft 1 are fixed to the chuck shaft 1a by bolts 11 as lids. Although these flange portions 3 and 4 are both formed in a circular shape, the flange portion 4 on the distal end side is provided as small as necessary so that it can be inserted into the core tube C.

As shown in FIGS. 2, 3 and 5, the ring-shaped meson 5 has six fitting projections 9 extending radially from the outer periphery toward the center of each of the segments 6.
And six support protrusions 12 extending from the opposite side of the fitting protrusion 9 to the vicinity of the outer periphery of the chuck shaft 1a. These support projections 12 are divided into two parts in the axial direction as shown in FIG. 3, and pins 13 are provided between the divided pieces. As shown in FIG. 2, one end of a tension spring 14 is hung on the pin 13. The tension spring 14 is hung on a pin 15 which is provided between It is urged in a counterclockwise direction, that is, in a direction toward an inner peripheral end 8a of the long groove 8 described later.

Each of the segments 6 has a fan shape as shown in FIGS. 2 and 6, and has a slit-shaped fitting recess 10 for slidably fitting the fitting projection 9 of the intermediate piece 5 at the center of the inside thereof. And two sides of the fitting recess 10
It has one stud hole 16 through which each of the studs 7 penetrates in the orthogonal direction.

As shown in FIG. 7, each of the long grooves 8 is formed so that one end thereof is inclined in the same direction and extends obliquely toward the outer periphery of the flange portions 3 and 4. In FIG. The circumferential end is an outer end 8b, and the opposite end is an inner end 8a. These long grooves 8 are cut in the pair of flange portions 3 and 4 so that the positions and shapes match.

On the other hand, in this embodiment, as shown in FIGS. 1 to 4 and FIG. 6, each segment 6 is located at the approximate center in the width direction of the outer peripheral surface of each segment 6 as shown in FIGS. When the ridge 17 is moved to the inner side of the core C, the ridge 17 having a triangular cross section is engaged with the inner diameter of the core C so as to bite into the inner diameter portion.
Are formed one by one. The ridge 17 is formed as a non-slip projection, but it is also possible to form one or more independent projections such as a cone as another non-slip projection. These projections are made of metal or the like, and have hardness and strength capable of supporting the inner diameter portion of the core C,
Also, the tip is formed to be sharp to some extent.

On the other hand, FIG. 8 is a side view showing a core chuck device according to a second embodiment of the present invention. Since the structure excluding the segments 6 is the same as that of the core chuck device according to the first embodiment, The same members are denoted by the same reference numerals and description thereof will be omitted.

On the outer peripheral surface of each segment 6 of the core chuck device of this embodiment, a rubber layer or a synthetic resin layer 18 for increasing the frictional force with the inner diameter of the core C is formed over almost the entire surface. I have. This rubber or synthetic resin layer 18
The segments 6 can be formed on the outer peripheral surface in an appropriate form such as a mesh, a spot, or a line.

In the chuck device of each of the above embodiments, the chuck shaft 1 is pivotally mounted on a machine frame of a winding device (not shown), and a winding power is applied to the chuck shaft 1 via an appropriate transmission mechanism. be introduced. The winding direction is counterclockwise in FIGS.

In the chuck device before the winding torque is applied, as shown in FIG. 2, the intermediate piece 5 is pulled in a counterclockwise direction by a tension spring 14. The pulling force of the meson 5 is transmitted to the segment 6 via the fitting projection 9, and the stud 7 penetrating the segment 6 abuts against the inner peripheral end 8 a of the long groove 8 of the flange portion 3, 4. As a result, the segment 6 is held at a position which is accommodated inward as shown in FIG.

On the other hand, when chucking the core tube, the segment 6 is inserted into the end of the core tube C as shown in FIG. At this time, a touch roller (not shown) attached to the winding device is in contact with the entire length of the core tube, so that the core tube C
A part of the inner surface contacts one of the segments 6.

Subsequently, when a winding torque is introduced into the chuck shaft 1 in the counterclockwise direction, the meson 5 temporarily extends in the clockwise direction while stretching the spring 14 as shown in FIG. Reverse rotation. When this movement is transmitted to each segment 6 through the fitting projection 9, the stud 7 of the segment 6 moves to the outer peripheral end 8b of the long groove 8, and as a result, each segment 6
The diameter of the core tube C is increased outward as shown in FIGS.

In this case, in the chuck device of the first embodiment, the ridge 17 of each segment 6 abuts so as to bite into the inner diameter of the core tube, thereby preventing the core C from slipping at the time of the chuck. It is possible to And
In the chuck device according to the second embodiment of the present invention, the core C can be chucked while the slip is similarly prevented by the frictional force of the rubber layer or the synthetic resin layer 18 of each segment 6.

When the winding torque is no longer transmitted, the segment 6 is automatically returned to the original inner position by the action of the tension spring 14, and the core tube is released from the chuck state.

[0028]

As described above, the core chuck device of the present invention comprises a pair of flanges provided with a gap and juxtaposed to the chuck shaft, and a ring-shaped member rotatably fitted to the chuck shaft in the gap. A meson, a plurality of segments provided with studs provided on the outer periphery of the meson, and a long groove of a flange for slidably inserting both ends of the stud,
A concave portion for slidably inserting the protrusion of the meson is formed in each of the segments, and the long grooves are formed obliquely in the same direction, respectively, to urge the meson toward the inner peripheral end of the long groove. And, a non-slip member is formed on the outer peripheral surface of each of the segments. By transmitting the winding torque to the chuck shaft and rotating the meso relatively reversely, the stud is formed along the long groove on the outer peripheral side. And the segment can be expanded outward to chuck the core from the inside.On the other hand, at the time of detachment, only the torque transmission is cut off, and the segment returns and the chuck state is automatically changed. This has the effect of canceling the operation.

Further, in the chuck device of the present invention,
Since each of the above components can be accommodated in the thin gap between the flanges, the axial length of the core holding mechanism to be inserted into the core tube can be formed to be significantly shorter than in the past. The required installation width of the chuck device can be reduced, and the minimum width of the web in the slitter can be freely reduced. Further, by providing a non-slip member such as a protrusion or a rubber layer on the outer peripheral surface of the segment, a remarkable effect of preventing the core from slipping at the time of chucking and reliably performing chucking of the core is achieved. Things.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 4;

FIG. 4A is a diagram illustrating a state at the time of chucking according to the first embodiment;
FIG. 3 is a cross-sectional equivalent view of the line A.

FIG. 5 is a front view of a meson.

FIG. 6 is a front view showing a segment and an arrangement state thereof.

FIG. 7 is a front view showing a flange portion and a long groove.

FIG. 8 is a side view showing a chuck device according to a second embodiment of the present invention.

FIG. 9 is a side view showing a conventional chuck device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a Chuck shaft 2 Air gap 3 Flange part 4 Flange part (lid) 5 Ring-shaped meson 6 Segment 7 Stud 8 Long groove 8a End near inner periphery of long groove 8b End near outer periphery of long groove 9 Fitting protrusion 10 Fitting recess DESCRIPTION OF SYMBOLS 11 Bolt 12 Support projection 13, 15 pin 14 Tension spring 16 Stud hole 17 Protrusion (projection part) 18 Rubber or synthetic resin layer

Claims (3)

(57) [Claims] 1. A pair of flanges arranged side by side with a predetermined gap in the axial direction at a tip end of a chuck shaft, and a ring-shaped intermediate member rotatably fitted to the chuck shaft in the gap. A plurality of segments arranged so as to surround the outer periphery of the meson almost equally; a stud penetrating each of these segments in the axial direction of the chuck shaft; and a pair formed with each of the flange portions. A plurality of long grooves into which both ends of the stud are slidably fitted, respectively.
Forming a plurality of fitting projections extending radially outward from the outer periphery of the meson toward the respective segments, and forming fitting recesses for slidably fitting the fitting projections in the respective segments, Each long groove of the flange portion is formed in the same direction in which one end extends obliquely toward the outer periphery of the flange portion, and urges the meson in the direction toward the inner periphery of these long grooves, and A core stopper formed on the outer peripheral surface of the core to abut against the inner diameter of the core when these segments move outward to prevent slippage of each segment and the core. apparatus. 2. The non-slip member according to claim 1, wherein the non-slip member is a protrusion that abuts on the inner diameter of the core so that the tip slightly bites into the inner diameter.
The core chuck device as described in the above. 3. The core chuck device according to claim 1, wherein the non-slip member is a rubber or synthetic resin layer that increases a frictional force with an inner diameter portion of the core.