JPH0929690A - Fiber cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the cutting ability of a cutter for cutting a long fiber to be cut wound on a rotary body having a number of blades radially arranged in parallel with an axis line in its circumferential surface by a blade reciprocating from an inner side to an axial direction to a specified length while backing up the wound fiber by a pressing body from the outside. SOLUTION: For a pressing body coming into contact with a fiber 4 wound on a rotary body 2 from the outside, an endlessly circulating belt-like pressing body 6 provided so as to be wound along the outer periphery of the rotary body 2 is used, a conventional dot-like pressing section is made longer and expanded along the outer periphery of the rotary body 2 and thereby a pressing section 8 having a proper length is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention winds a strip-shaped and long fiber to be cut into a desired length and wound around the outer periphery of a rotor.
A fiber cutting device, wherein the wound fiber is backed up from the outside by a pressure contact body, and is cut from the inside by reciprocating movement of blades radially arranged at predetermined intervals on the peripheral surface of the rotating body. It is characterized in that a long cutting section is formed along the peripheral surface of the rotating body by using a band-shaped pressure contact body that circulates endlessly.

[0002]

2. Description of the Related Art The applicant has previously filed Japanese Patent Application No. 6-34096.
According to No. 1, while rotating the rotating body in one direction, the rotating body is provided so as to reciprocate an appropriate distance on the axis line, while a disk-shaped guide plate and a scraper are respectively provided on the left and right sides along the peripheral surface of the rotating body. While rotating at the same speed as the rotating body, supply a long fiber to be cut between the guide plates and wind it around the rotating body.While contacting the pressure contact body from the outside, the blade reciprocates inside to give a predetermined length. We proposed a fiber cutting device that cuts into small pieces and discharges the cut fibers to the outer circumference of the rotating body by the tip of a scraper interposed between the blades.

[0003]

A press roller as a pressure contact member for backing up fibers cut from the inside from the outside by the above-mentioned reciprocating blade that is wound around the outer periphery of the rotating body while being wound around the tip of each blade. In the device of the above-mentioned prior application using the above, since the pressing position of the press roller is formed only at one position on the outer circumference of the rotating body with respect to one press roller, it is possible to suppress each blade arranged on the circumference from the outside. There was a drawback that the cutting force was low and the cutting efficiency was low.

Further, in the conventional apparatus, when the blades arranged on the peripheral surface of the rotating body have a wide interval (for example, 25 mm or more), a cut is provided between the blades and a fiber is formed at that position. It was possible to wrap it around the rotating body by sandwiching the start end, but when the blade spacing is extremely narrow (for example, 0.5 mm spacing)
Since it is impossible to provide a place to insert the fiber, it is difficult to wind the starting end of the fiber around the rotating body, and in any case, stop the device for winding the starting end of the fiber around the rotating body. However, there is a drawback that the operating rate is reduced.

From the above, it is a problem to be solved in this kind of fiber cutting device to improve the cutting ability of the device and to eliminate the decrease in efficiency when newly supplying the next fiber. It was

[0006]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a large number of blades are radially arranged on the circumferential surface at intervals in the circumferential direction, and the blades are rotated in one direction while an appropriate distance is provided on the axis. The rotating body is provided so as to reciprocate, and is provided along the outer periphery of the rotating body. While rotating at the same speed as the rotating body, a strip-shaped long fiber wound around the rotating body is used to reciprocate the rotating body. A pair of left and right disk-type guide plates that prevent the coil from rotating at a predetermined winding position, and an intervening space between the guide plates from the outside of the rotating body, so that the fibers wound around the rotating body are pressed into contact with each other so as to be driven to rotate. An outer circumference of the rotating body, which is provided with the above-mentioned blade that reciprocates integrally with the rotating body, and a press-contact body that backs up from the outside that the fiber is cut into a length corresponding to the arrangement interval of the blade from the inside of the winding. Along the outer surface of both guide plates Between the blades, forming discharge spaces for the cut fibers, and rotating at a constant speed with the rotating body and the guide plate at the same time, with the tips intervening between the blades to cut the cut fibers. In a fiber cutting device having a scraper provided so as to be discharged from between the blades, the pressure contact member is directed toward the peripheral surface of the rotor while being superposed on the outside of the fiber wound around the rotor. The present invention provides a fiber cutting device, characterized in that it is constituted by an endlessly circulating strip-shaped press-contacting body which is provided so as to form a press-contacting section having an appropriate length for press-contacting.

In the apparatus of the present invention, if one or more auxiliary pressure contact rollers are provided on the outer side of the band-shaped pressure contact band, the backup of the fibers formed by the band-shaped pressure contact band is further strengthened and the pressure generated in the pressure contact section is suppressed. Can be equalized, and the cutting ability can be further improved.

[0008]

According to the present invention, the fibers wound around the rotating body are pressed against each other by a band-shaped pressing member instead of the press roller.
The pressure contact section of the fiber extends over the entire section along which the strip-shaped pressure contact body is arranged so as to be wound around the outer periphery of the rotating body. Therefore,
Since a large number of blades arranged on the circumference are backed up for cutting at the same time, the cutting ability is significantly improved. Further, if the next fiber can be supplied by being attached to the strip-shaped pressure contact member that circulates toward the rotary member, the automatic supply of the fiber becomes possible.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating the principle of the present invention in which a band-shaped pressure contact member is used. In the figure, reference numeral 1 denotes a rotary body drive shaft that rotates in one direction and reciprocates on the axis by a length that appropriately exceeds the width of the fiber to be supplied by a mechanism described later. A rotating body 2 has a plurality of blades 3 radially arranged on the circumferential surface at a desired interval in the circumferential direction and parallel to the axis line, and fixed to the rotating body drive shaft 1.

A guide 5 is provided so that the blade 4 is wound from one side of the rotating body 2 onto each blade 3 and is wound in multiple layers.
Long fibers supplied through. Reference numeral 6 is a strip-shaped pressure contact body which is endlessly circulated while being pressed against the blade 3 from the outside of the fiber 4 wound around the rotating body and being driven to rotate by pressure contact with the fiber 4.

The pressure contact member 6 is wound endlessly between a plurality of rollers 7 arranged in front of and behind the rotating member 2 in the direction of rotation and having axes parallel to each other. It backs up that the fiber 4 is cut from the inside by the reciprocating motion of the blade 3.

The section in which the rotating body 2 and the pressure contacting body 6 are in pressure contact with each other is formed by a roller 7'arranged in front of and behind the rotating body 2 on the outer periphery of the rotating body 2 for a half or more of the circumference, leaving a supply gap for the fibers 4. This device can be used as the pressure contact section 8 for the fiber 4 to be cut.

The roller 7 "is a tension roller, which tensions the strip-shaped pressure contact member 6 to generate a desired pressure contact force in the pressure contact section 8. Further, in the figure, 9 is outside the pressure contact section 8. It is an auxiliary pressing roller that is additionally provided when the pressing body 6 is pressed together from the outside while co-rotating to strongly suppress the fibers 4.

As shown in FIG. 1, the fibers 4 wound around the outer periphery of the rotating body 2 are backed up from the outside by a strip-shaped pressure contact body 6 that is also wound around the rotating body 2, and the fibers of the rotating body 2 are also backed up. Multiple blades 3 arranged in the circumferential direction
Will be cut from the inside. Therefore,
The pressure contact section 8 of the present apparatus is extremely long as compared with the conventional press roller type, and the cutting ability is remarkably improved.

Further, since the fiber 4 to be cut is wound on the front side of winding around the rotating body 2 while forming a portion to be superposed on the strip-shaped pressure contact body 6 circulating in the same direction, the starting end portion is wound. It is not necessary to wind around the rotating body in advance, and it is possible to automatically supply the next fiber.

Next, the fiber 4 wound around the rotating body 2 is supplied against the mechanism that reciprocates on the axis while rotating the rotating body drive shaft 1 and the blade 3 that reciprocates with the rotating body 2. The scraper 11 and the like for discharging the cut fibers accumulated between the guide plate 10 which is held in the position and each blade 3 of the peripheral surface of the rotating body 2 to the outside of the system will be described with reference to FIG.

As shown in FIG. 2, both ends of the rotary body drive shaft 1 penetrating the rotary body 2 and projecting to the left and right are provided with a pair of left and right large-diameter rotary bodies a and b via ball spline bearings 12.
It rotates together with and is free to reciprocate left and right.

The rotary body 2 has one end (see FIG. 2) of the rotary body drive shaft 1.
The crank type reciprocating drive mechanism 14 is connected via a coupling 13 provided on the right hand of FIG. 2 and is driven by a rotary drive mechanism 15 connected to one of the large-diameter rotating bodies b (right hand of FIG. 2). While revolving in one direction with the large-diameter rotating bodies a and b, they are driven by the reciprocating drive mechanism 14 to reciprocate on the axis.

The pair of left and right large-diameter rotating bodies a and b are rotatably supported by the frame F via radial bearings 16 provided on the outer circumference thereof, and rotate at a constant speed with the rotating body 2 at a fixed position. The disk-shaped guide plate 10 is formed by sandwiching the fiber 4 to be cut and the strip-shaped pressure contact body 6 from the left and right sides on the end faces of the large-diameter rotary bodies a and b facing each other at the center of the outer periphery of the rotary body 2.
Also, a disk-type scraper 11 is attached.

The pair of left and right guide plates 10 cuts the blade 3 which reciprocates integrally with the rotating body 2 with the fiber 4 supplied at a fixed position and the strip-shaped pressure contact body 6 superposed thereon as described above. Stop in place against resistance.

Although not shown, the pair of left and right scrapers 11 each have an internal gear shape, and the tips of the scrapers 11 facing each other and inclined as shown in the drawing are arranged along the peripheral surface of the rotating body 2. , Intervening between the bases of the blades 3, and as shown in FIG. 3, the fibers 4 wound around the peripheral surface of the rotating body 2 and cut by the blades 3 from the inside are directed toward the outer periphery of the rotating body 2. Discharge.

A discharge gap 17 for discharging the cut fibers is formed between the base of the scraper 11 located outside and the guide plate 10 located inside, except for the connecting portion of both members. The fibers scraped by the scraper 11 are quickly discharged from the system through the gap 17.

[0023]

As described above, according to the apparatus of the present invention, instead of the press roller, a pressure contact section having an appropriate length is formed on the outer circumference of the rotary body in which a large number of blades are arranged by a band-shaped pressure contact body. For example, as described above, the fibers that are being backed up from the outside by the press-contacting body in the long press-contacting section can be simultaneously cut from the inside by a large number of blades, so that the cutting ability is significantly improved as compared with the conventional device.

Further, since the fibers to be cut can be automatically supplied along with the strip-shaped pressure contact member, the cutting ability can be improved. The present invention has extremely excellent effects as described above.

[Brief description of drawings]

FIG. 1 is a side view for explaining an embodiment of the present invention in principle.

FIG. 2 is a partially cutaway vertical front view showing the configuration of the apparatus.

FIG. 3 is a partially cutaway sectional view showing formation of a pressure contact section by a band-shaped pressure contact body.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 rotary body drive shaft 2 rotary body 3 blade 4 fiber 5 guide 6 band-shaped pressure contact body 7 roller (7 ': roller before and after the rotary body,
7 ″: tension roller) 8 pressure contact section 9 auxiliary pressure contact roller 10 guide plate 11 scraper 12 ball spline bearing 13 coupling 14 crank type reciprocating drive mechanism 15 rotation drive mechanism 16 radial bearing 17 discharge gap a large diameter rotating body b large diameter rotating Body F frame

Claims (2)

[Claims] 1. A rotation provided in such a manner that a large number of blades, which are parallel to the axis line, are radially arranged on the circumferential surface at intervals in the circumferential direction, and are reciprocally moved on the axis line by an appropriate distance while rotating in one direction. The body and the outer circumference of the rotating body are rotated at the same speed as the rotating body, and the strip-shaped long fiber wound around the rotating body is sandwiched at a predetermined winding position against the reciprocating motion of the rotating body. It is equipped with a pair of left and right disk-type guide plates that stop and intervenes between the guide plates from the outside of the rotating body, presses against the fibers wound around the rotating body, and is driven to rotate, and reciprocates integrally with the rotating body. By the moving blade, the fibers are cut from the inside of the winding to a length corresponding to the arrangement interval of the blades, a pressure contact body that backs up from the outside, and the outer surfaces of both guide plates along the outer periphery of the rotating body. The discharge gap of the cut fiber between And to discharge the cut fibers from between the blades by the tips interposing between the blades while rotating at a constant position with the rotating body and the guide plate at a constant speed. In a fiber cutting device having a scraper, the pressure contact member has a pressure contact section of an appropriate length for pressing the fiber toward the peripheral surface of the rotor while overlapping the outside of the fiber wound around the rotor. A fiber cutting device, which is provided so as to be formed and is constituted by an endlessly circulating strip-shaped press contact body. 2. The one or more auxiliary pressure contact rollers provided so as to strengthen the pressure contact of the pressure contact body in the pressure contact section from the outside, in the band-shaped pressure contact body. 1 fiber cutting device.