JPH08259065A - Expander roll with bridge piece and bridge piece - Google Patents

Abstract

PURPOSE: To compose an expander roll with bridge piece so as not to cause the separation of an adhering part between each rotor and an elastic cylindrical body even in the case of long term use. CONSTITUTION: A plurality of rotors 32 of an expander roll with an arch piece 30 is severally rotatably arranged on a shaft 31 so that each of its inclination angles to the shaft 31 may increase as approaching to both the ends of the shaft 31. Many fitting grooves 34 which extend right and left at fixed distances from a center in lateral direction are formed at fixed pitches on the outer periphery of each roller 32. The fitting grooves 34 of the adjacent rotors 32 are formed so as to be mutually opposite, and the bridge piece 35 is fitted inside the opposite fitting grooves 34. The bridge piece 35 has an inclined face 35b having a descent slope from a longitudinal center toward both the right and left on a face which comes into contact with the inner periphery of an elastic cylindrical body 36 fitted on the outer periphery of each rotor 32, and is formed so as not to strongly press the inner periphery of the elastic cylindrical. body from the inside even if oscillating during rotation of the roll 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly used in the fields of cloth manufacturing technology, paper manufacturing technology, and film manufacturing technology to extend running cloths, running papers, running films, and other sheet-like running objects in the width direction and to widen them. Regarding the expander roll used to widen the intervals between a plurality of narrow sheet-shaped running objects cut from the original fabric, more specifically, a bridging piece is fitted between the disk-shaped rotors that constitute the expander roll. The present invention relates to an expanded roll equipped with a cross-linking piece and a cross-linking piece used for the expander roll.

[0002]

2. Description of the Related Art As disclosed in Japanese Utility Model Publication No. 6-17798, an expander roll with a bridging piece has a plurality of disc-shaped rotors whose inclination angles with respect to a shaft are gradually increased along the axial direction of the shaft. In this way, the problem was seen in the previous expander roll that was rotatably arranged in an axially mounted manner, and that the arranged rotors were covered with an elastic cylinder such as a rubber cylinder to form a roll shape. In order to solve the problem that many stepped portions are formed on the surface of the elastic tubular body due to the portions of the elastic tubular body located between the rotors being depressed during operation, A large number of bridging pieces for supporting the elastic cylindrical body from the inside thereof are arranged along the peripheral surface of the rotor.

An example of the structure of such a conventional expander roll with cross-linking pieces is shown in FIGS. 7 and 8. FIG. 7 is a partial cross-sectional view of a conventional expander roll with a bridging piece, and FIG.
Is a detailed view of its main part.

As shown in FIG. 7, a plurality of disc-shaped rotors 2 are rotatably arranged via bearings 3 on a shaft 1 extending linearly. Each rotor 2 has a shaft 1
Symmetrically from the center in the axial direction of the shaft 1 with respect to the shaft 1 at a predetermined inclination angle (a line perpendicular to the axis of the shaft 1 and the rotor 2).
The angle between the rotor 2 and the rotor 2 is increased so that the angle of inclination of the rotor 1 increases toward the outer side. Is wide and narrow at the bottom of the figure.

As shown in FIG. 8, on the outer peripheral surface of each rotor 2, there is provided a fitting groove 4 extending toward the left and right sides from the central portion of each rotor 2 in the thickness direction along the outer peripheral surface. Are formed in large numbers. The fitting grooves 4 of the adjacent rotors 2 are formed at positions facing each other, and the bridging pieces 5 are fitted in the facing fitting grooves 4, respectively.

An elastic cylindrical body 6 is fitted on the outer circumference of each rotor 2, and the inner peripheral surface of this elastic cylindrical body 6 is attached to the outer peripheral surface of each rotor 2 at the center in the thickness direction by an adhesive or the like. Partially fixed.

In the conventional expander roll with a cross-linking piece having such a structure, when the sheet-like running object hung on the roll is rotated by the running force, the elastic cylindrical body 6
Is gradually expanded on the side that rotates from a point with a narrow interval between the rotors 2 to a wide point, and conversely gradually contracts on the side that rotates from a point with a wide interval between each rotor 2 to a narrow point. The sheet-like running object can be expanded in the width direction by repeating the expansion and contraction action to pass the sheet-like running object from the vicinity of the minimum contraction portion to the vicinity of the maximum extension portion. Supports the elastic tubular body 6 from the inside thereof to prevent a step from being formed on the surface of the elastic tubular body 6.

[0008]

However, in such an expander roll with a bridging piece, as shown in FIG. 8, since each rotor 2 is inclined with respect to the shaft 1, the outer peripheral surface of each rotor 2 is reduced. The distance between the fitting groove 4 formed on the inner peripheral surface of the elastic cylinder 6 and the inner peripheral surface of the elastic cylindrical body 6 is different between the adjacent rotors 2 and, on the side where the distance between the adjacent rotors 2 is wide, The fitting groove 4 of the large rotor 2 (left side in the figure) is closer to the inner peripheral surface of the elastic cylindrical body 6, and conversely, on the side where the gap is narrower, the inclination angle of the rotor 2 (right side in the figure) is smaller. The fitting groove 4 is closer to the inner peripheral surface of the elastic tubular body. Therefore, the bridging piece 5 fitted between the adjacent rotors 2 swings between the elastic cylindrical body 6 and the rotor 2 while the roll rotates, and the bridging piece 5
Both end portions of the above strongly press the inner peripheral surface of the elastic tubular body 6 from the inside. Therefore, in the conventional expander roll with a cross-linking piece, if the roll is used for a certain period or longer, an unreasonable force acts on the bonded portion between the outer peripheral surface of each rotor 2 and the inner peripheral surface of the elastic tubular body 6, This adhesive portion was easy to peel off. When the peeling of the bonded portion occurs, the elastic cylinder body 6 does not perform the desired expansion and contraction action, and thus cannot fulfill its function.

The present invention has been made in view of the above circumstances, and an object thereof is an expander roll with a cross-linking piece and a cross-linking piece in which the bonded portion between each rotor and the elastic cylindrical body is difficult to peel off even after long-term use. To provide.

[0010]

In order to achieve the above object, an expander roll with a bridging piece according to the present invention comprises a shaft and a plurality of shafts rotatably arranged on the shaft at an inclination angle gradually increasing along the shaft. Disk-shaped rotors and elastic cylinders fitted on the outer peripheral surfaces of the rotors, and bridging pieces are fitted in the fitting grooves formed on the outer peripheral surfaces of the rotors. In the expander roll with a cross-linking piece, the cross-linking piece has slopes each having a downward slope on the surface of the cross-linking piece that is in contact with the inner peripheral surface of the elastic tubular body from the middle portion in the longitudinal direction of the cross-linking piece to both ends. It is characterized by being.

More specifically, the invention is characterized in that a horizontal surface adjacent to the inclined surface is formed in the middle portion in the lengthwise direction of the bridging piece.

Further, the cross-linking piece of the present invention is a cross-linking piece for an expander roll with a cross-linking piece, and the cross-linking piece is provided on the surface of the expander roll on the side in contact with the inner peripheral surface of the elastic cylinder from the longitudinal middle portion. It is characterized in that inclined surfaces having a downward slope are formed toward both ends.

[0013]

In the expander roll with cross-linking piece of the present invention, the cross-linking piece is directed to the surface of the cross-linking piece in contact with the inner peripheral surface of the elastic cylinder from the middle portion in the lengthwise direction of the cross-linking piece. Since each of them has a downwardly sloping inclined surface, both ends of each rotor strongly press the inner peripheral surface of the elastic cylinder from the inside even if the bridge piece swings while the roll rotates. Therefore, compared with the conventional one, the force that does not act on the adhesive part between each rotor and the elastic cylinder does not act, and it is possible to greatly reduce the possibility of peeling off the adhesive part, making the roll longer. It becomes possible to use it stably for a period.

In the present invention, in the case where a horizontal plane adjacent to the inclined surface is formed in the middle portion in the lengthwise direction of the bridging piece, the above-mentioned effect can be obtained without reducing the function of supporting the elastic cylindrical body from the inside. Is possible.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a web winding device and a cutting device provided with an expander roll with a bridging piece according to an embodiment of the present invention.

The web winding device 10 shown in FIG. 1 holds a winding core 21 with two long surface drums 11 and a plurality of divided rider rollers 12 arranged at a predetermined pitch.
While applying a rotational driving force to this, a plurality of narrow webs 23 of, for example, a photosensitive material that are cut and transferred from the wide web 22 in the cutting device 50 are wound around the winding core 21 for each slit 24. It is configured.

The expander roll with cross-linking piece (hereinafter, also simply referred to as a roll) 30 of this embodiment is a cutting device.
An upper blade 51 and a lower blade 52 of 50, and is disposed between the surface drum 11 of the web winding device 10, while contacting a plurality of narrow webs 23 that have been cut, while rotating by these running forces, It is configured to increase the distance between the webs 23.

FIG. 2 is a partial cross-sectional view showing the internal structure of the roll shown in FIG. 1, FIG. 3 is a detailed view of part A in FIG. 2, and FIG. 4 is a detailed view of the essential parts of the roll shown in FIG.

As shown in FIG. 2, the roll 30 has a shaft 31 extending linearly, and a plurality of disc-shaped rotors 32 are rotatably arranged on the shaft 31 via bearings 33. Has been done. The rotors 32 are symmetrical with respect to the center of the shaft 31 in the axial direction so as to maintain a predetermined inclination angle with respect to the shaft 31 and are positioned outwardly so that the inclination angle increases. The rotors 32 are axially supported by the shaft 31, so that the intervals between the rotors 32 are wide at the upper side of the drawing and narrow at the lower side of the drawing.

On the outer peripheral surface of each rotor 32, as shown in FIG. 4, fitting grooves 34 extending toward the left and right sides are formed along the outer peripheral surface at a slight interval from the central portion in the thickness direction of each rotor 32. Are formed with a predetermined pitch. The fitting grooves 34 of the adjacent rotors 32 are formed at positions facing each other,
A bridging piece 35 (which will be described later in detail) is fitted in each of the facing fitting grooves 34.

An elastic cylinder such as a rubber cylinder is provided around the outer circumference of each rotor 32.
36 is fitted. As shown in FIG.
As shown in FIG. 5, the grooves 36a extending in the circumferential direction are formed with a fine pitch, so that good contact with the web 23 can be achieved. The inner peripheral surface of the elastic tubular body 36 is
The outer peripheral surface of 32 is partially fixed to the central portion in the thickness direction with an adhesive or the like.

FIG. 5 is a perspective view showing a schematic structure of the bridging piece shown in FIG. 4, and FIG. 6 is a sectional view taken along line VI-VI in FIG.

As shown in FIGS. 5 and 6, the bridging piece 35 has an intermediate portion in the longitudinal direction on the surface (the surface facing the upper side in the figure) on the side in contact with the inner peripheral surface of the elastic cylindrical body 36. 35a formed at the horizontal plane and slopes 35b that are formed in a downward slope respectively from the end of the horizontal plane 35a toward both ends in the length direction of the bridge piece 35.
It has and. Further, hemispherical convex curved surfaces 35c are formed on the surface facing the lower side in the drawing at the center portion in the length direction and both left and right ends thereof, and each convex curved surface 35c is formed in the fitting groove 34. The concave curved surface 34a thus formed can be fitted smoothly. In addition, reference numeral 35d in the drawing denotes an insertion groove of a binding strip such as a rubber cord for preventing the bridging pieces 35 fitted in the fitting grooves 34 from being unintentionally detached.

As a concrete example, the bridging piece 35 has a length of 48.
mm, the thickness of the central part is 6.4 mm, the thickness of both ends is 4.3 mm, and the length of the horizontal surface 35a is 3 from the center in the length direction of the bridging piece 35.
It is formed to have a size of mm.

The roll 30 constructed as above is shown in FIG.
When rotated by the running force of each web 23 wound around the roll 30 as shown in FIG.
The expansion and contraction action of gradually extending on the side that rotates from a point with a narrow interval of 32 to a wide point and conversely gradually contracting on the side of rotating each rotor 32 from a point with a wide interval to a narrow point. repeat. Roll 30 that repeats this stretching action
It is possible to widen the interval between the webs 23 by contacting the elastic cylinders 36 with the webs 23 so that the webs 23 pass from the vicinity of the minimum contraction portion to the vicinity of the maximum contraction portion of the elastic cylinder 36. Becomes While the roll 30 rotates, each bridging piece 35 continues to oscillate between the elastic cylindrical body 36 and the rotor 32. However, since the bridging piece 35 has the inclined surface 35b as described above, Even if the piece 35 swings, the left and right ends of the bridging piece 35 strongly press the inner peripheral surface of the elastic cylindrical body 36 from the inside, and the elastic cylindrical body 36
Unreasonable force does not act on the bonding portion between the rotor 32 and each rotor 32. Therefore, the roll 30 can be stably used while maintaining the desired function for a long period of time without causing peeling at the bonded portion between the elastic tubular body 36 and each rotor 32. According to an experiment conducted by the applicant, the conventional one has 2
Peeling of the adhesive part was observed after ˜3 months, whereas in the case of the present invention, almost no peeling of the adhesive part was observed even after 6 months or more of use.

Although one embodiment of the present invention has been described above, the present invention is not limited to the specific mode of the embodiment, and various modifications can be made.

For example, in the above embodiment, the rotors are arranged symmetrically from the center of the lengthwise direction of the shaft, but the rotors are arranged so that the inclination angle gradually increases from one end of the shaft to the other end. May be arranged.

In the above-mentioned embodiment, the gap between the cut webs is widened. In the present invention, however, the expander roll with a cross-linking piece is used for extending the sheet-like running object in the width direction. Of course, it can also be applied to.

[Brief description of drawings]

FIG. 1 is a perspective view of a web winding device and a cutting device including an expander roll with a cross-linking piece according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of the expander roll with a bridging piece shown in FIG.

FIG. 3 is a detailed view of part A in FIG.

FIG. 4 is a detailed view of an essential part of the expander roll with a bridging piece shown in FIG.

5 is a schematic perspective view of the bridging piece shown in FIG.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a partial cross-sectional view of a conventional expander roll with a bridging piece.

FIG. 8 is a detailed view of the essential parts of the expander roll with cross-linking piece shown in FIG.

[Explanation of symbols]

 10 Web take-up device 23 Web 30 Expander roll with bridge piece 31 Shaft 32 Rotor 33 Bearing 34 Fitting groove 35 Bridge piece 35a Horizontal surface 35b Sloping surface 35c Convex curved surface 36 Elastic cylinder 50 Cutting device

Claims (3)

[Claims] 1. A shaft, a plurality of disk-shaped rotors axially rotatably arranged on the shaft at an inclination angle gradually increasing along the shaft, and fitted on the outer peripheral surface of each rotor. An expander roll with a bridging piece in which a bridging piece is fitted in a fitting groove formed on the outer peripheral surface of each of the rotors, the inner circumference of the elastic tubular body of the bridging piece. An expander roll with a cross-linking piece, wherein sloped surfaces each having a downward slope are formed on the surface on the side in contact with the surface from the intermediate portion in the longitudinal direction of the cross-linking piece toward both ends. 2. The expander roll with a bridging piece according to claim 1, wherein a horizontal plane adjacent to the inclined surface is formed at an intermediate portion in the longitudinal direction of the bridging piece. 3. A cross-linking piece for an expander roll with a cross-linking piece, wherein the surface of the expander roll on the side in contact with the inner peripheral surface of the elastic cylinder extends from the middle portion in the longitudinal direction toward both ends. A cross-linking piece for an expander roll with a cross-linking piece, characterized in that an inclined surface having a downward slope is formed.