JP2683893B2 - 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 In a conventional core chuck device in a slitter, for example, as shown in FIG. 8, a body portion 18 of a chuck 17 that can be opened and closed to the left and right is inserted into a core tube C and a lug ( The core tube C is chucked by projecting (not shown) and pressing the lug against the inner diameter portion of the core tube C.

That is, in the above-mentioned conventional chuck device, since the lug projecting mechanism is housed inside the chuck body 18, there is a problem that the length L ₁ of the chuck body 18 becomes long.

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 The present invention has been made in order to cope with the above-mentioned actual situation. By shortening the holding mechanism of the winding core, the required installation width of the chuck device can be reduced, and the slitter can be used. It is an object of the present invention to provide a chuck device capable of reducing the minimum width of the chuck.

[0006]

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 to have an inclination in the same direction that extends obliquely toward the outer periphery of the flange portion, and the intermediate element is biased toward the inner peripheral end portions of these long grooves.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The core chuck device of the present invention is formed, for example, in a structure as shown in FIGS. 1 to 4, and each segment shown in FIGS. 1 and 2 when chucking a core tube. 6 is inserted into the end portion of the winding core tube, and the winding torque in the same direction as the biasing direction of the intermediate piece 5 is transmitted to the chuck shaft 1.

In each segment 6 before the winding torque is applied, as shown in FIG. 2, since the intermediate element 5 is biased toward the inner peripheral end 8a side of the long groove 8, the intermediate element 5 is rotated. Each stud 7 transmitted through the fitting projection 9 and the segment 6 is also biased to the inner peripheral end 8a of the long groove 8, so that the segment 6 through which the stud 7 is provided is not It is in a position that is close to you.

On the other hand, when a winding torque is applied to the chuck shaft 1, the intermediate member 5 temporarily rotates in the opposite direction relative to the flange portions 3 and 4 which rotate integrally with the chuck shaft 1, as shown in FIG. In this way, the stud 7 is moved to the outer peripheral end 8b of the long groove 8 via the fitting protrusion 9 and the segment 6. As a result, the stud 7 moves each segment 6 so as to expand the outer diameter as shown in FIG.
The segment 6 is pressure-contacted to the inner diameter portion of and chucked.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying 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 the line AA of FIG. 1, and FIG.
4 is a sectional view taken along line B-B, and FIG. 4 is a sectional view taken along the line AA in FIG.

The chuck device of the above embodiment uses the structure shown in FIG. 1 as a pair of right and left. As shown in the figure, a gap 2 of about several mm is opened in the axial direction at the tip of the chuck shaft 1. 2 and 3, and the ring-shaped intermediate member 5 rotatably fitted into the chuck shaft 1a in the gap 2 as shown in FIGS. As shown, six segments 6 are arranged on the circumference so as to equally surround the outer periphery of the meson 5, and as shown in FIG. 2 and 12 pairs of long grooves 8 which are formed in pairs on the inner surfaces of the flanges 3 and 4 as shown in FIGS. 2 and 3, and in which both ends of the stud 7 are slidably inserted. Is equipped with.

As shown in FIG. 3, the flange portions 3 and 4 are such that the flange portion 4 on the tip side of the chuck shaft 1 is fixed to the chuck shaft 1a by a bolt 11 as a lid. 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 intermediate member 5 has six fitting projections 9 extending radially from the outer peripheral portion thereof toward the centers of the respective 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.

On the other hand, each segment 6 has a fan shape as shown in FIGS. 2 and 6, and a slit-shaped fitting concave portion 10 into which the fitting projection 9 of the intermediate piece 5 is slidably inserted is formed at the inner center thereof. In addition to having the above-mentioned 2
It has one stud hole 16 through which each of the studs 7 penetrates in the orthogonal direction. In addition, each segment 6 above
Means for increasing the friction coefficient, such as knurling or sticking a rubber plate, is provided on the outer peripheral surface of the.

As shown in FIG. 7, each of the long grooves is formed so that one end thereof is inclined in the same direction and extends obliquely toward the outer circumferences of the flange portions 3 and 4, and in the same figure, it is formed clockwise. The end in the direction is the outer peripheral end 8b, and the opposite is the inner peripheral end 8a. These long grooves 8 are 1
The pair of flange portions 3 and 4 are cut so that their positions and shapes match.

In the chuck device of the above embodiment, however, the chuck shaft 1 is pivotally attached to the machine frame of the winding device (not shown), and the winding power is introduced into the chuck shaft 1 through an appropriate transmission mechanism. To be done. The winding direction is counterclockwise in FIGS.

In the chuck device before the winding torque is applied, the intermediate element 5 is pulled in the counterclockwise direction by the tension spring 14 as shown in FIG. 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, as shown in FIG. 3, up to the segment 6 is inserted into the end of the core tube C. 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.

Then, when a winding torque is applied to the chuck shaft 1 in the counterclockwise direction, the intermediate member 5 stretches the spring 14 in the clockwise direction while facing the chuck shaft 1 as shown in FIG. Rotate backwards. 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.

When the winding torque is not 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.

[0022]

As described above, the core chuck device of the present invention has a pair of flanges provided in parallel with the chuck shaft with a gap, and a ring shape rotatably fitted in the chuck shaft in the gap. An intermediate member, a plurality of segments provided with studs on the outer periphery of the intermediate member, and a long groove of a flange into which both ends of the stud are slidably inserted are provided, and a protrusion of the intermediate member is provided on each segment. The chuck shaft is formed so as to be slidably fitted therein, the long grooves are formed to be slanted in the same direction, and the intermediate element is biased toward the inner peripheral end of the long groove. The stud is moved along the long groove to the outer peripheral side by transmitting the winding torque to and rotating the intermediate member in the opposite direction.
This makes it possible to expand the segment outward and chuck the winding core from the inside.On the other hand, at the time of disengagement, the segment is restored and the chucked state is automatically released simply by cutting off the torque transmission. It is effective.

Further, in such a chuck device, since each of the above-mentioned constituent members 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 is significantly shorter than the conventional one. It is possible to reduce the required installation width of the chuck device and thereby to freely reduce the minimum width of the web in the slitter.

[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. 4 is an A- of FIG. 1 showing a state at the time of chucking of the same embodiment.
It is a sectional equivalent view of the A line.

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 conventional chuck device.

[Explanation of symbols]

 1, 1a Chuck Shaft 2 Gap 3 Flange 4 Flange (Lid) 5 Ring Intermediate 6 Segment 7 Stud 8 Long Groove 8a Inner Edge of Long Groove 8b Outer Edge of Long Groove 9 Fitting Protrusion 10 Fitting Recess 11 bolts 12 support protrusions 13 and 15 pins 14 tension springs 16 stud holes

Claims (1)

(57) [Claims] 1. A pair of flanges arranged in parallel at the tip of the chuck shaft with a predetermined gap in the axial direction, and a ring-shaped intermediate member rotatably fitted in the chuck shaft in the gap. A plurality of segments that are arranged so as to surround the outer periphery of the meson in a substantially equal manner, a stud that penetrates each of the segments in the axial direction of the chuck shaft, and a pair of flanges that are formed. , A plurality of long grooves into which both ends of the stud are slidably fitted, respectively, and a plurality of fitting protrusions extending radially outward from the outer peripheral portion of the intermediate member toward the respective segments are formed, A fitting recess is formed in each of the segments so that the fitting projection is slidably inserted therein, and the long grooves of the flange portion are formed in the same direction with one end obliquely extending toward the outer periphery of the flange portion. ,And Core chuck device being characterized in that biased in the direction of the inner peripheral inboard end of the long groove of the serial mesons.