JPH08216303A - Log paper-cutting device - Google Patents

Abstract

PURPOSE: To efficiently cut log paper into a beautiful cut end at high velocity by passing a band saw between a driving pulley and a driven pulley which are supported on a supporting frame and rocking the supporting frame by a rocking mechanism, so that the band saw is moved to the cutting position of the log paper and the position separated therefrom and intermittently push- feeding the log paper by a feeding conveyor. CONSTITUTION: Log paper R on a bed 11 is push-fed by intermittent push-feed of a pusher 13 by means of a feeding conveyor 10 and inserted into a roll holding unit of a state in which a leaf is constricted. The tip of the inserted log paper R is allowed to collide against a disk 31 and positioning of the cutting position is performed and also the feeding conveyor 10 is stopped. Then, the leaf of the roll holding unit is expanded and stuck to the internal circumference of a core hole of the tip part of the log paper R and supported. While a driving pulley is driven by a motor on a supporting frame 5 and a band saw 1 passed between the driving pulley and a driven pulley 3 is revolved at high velocity, the supporting frame 5 freely rockingly supported through the rocking mechanism 8 of a housing 7 is lowered by a trunnion shaft 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a log paper cutting device. The log paper is a log-shaped roll of paper that is cut into a predetermined length to form toilet paper or kitchen roll paper. Generally, the paper made by a paper machine is wide and is wound into a large diameter (about 2 to 4 m in diameter) as it is by a winder. The log paper is obtained by winding the large-diameter roll paper into a small diameter (toilet paper φ114 mm, kitchen roll paper φ100 to 300 mm, etc.). The present invention relates to a cutting device which cuts the log paper at intervals of 100 to 114 mm to make toilet paper, or cuts at intervals of about 220 mm to 230 mm to make kitchen roll paper.

[0002]

2. Description of the Related Art A conventional log paper cutting device is disclosed in Japanese Patent Laid-Open No. 4-209156, and its basic structure will be described with reference to FIG. Reference numeral 101 denotes two circular saws, which are rotatably attached to the tip of an arm 102 and are adapted to rotate at high speed by a motor or the like. The arm 102 is rotatable around a shaft 103, and is rotated by a motor or the like. For this reason, the circular saw 101 revolves around its own axis. The log paper R is cut by the circular saw 101 which rotates while revolving.

[0003]

In the cutting device of the conventional example described above, in order to cut at a high speed, the diameter of the circular saw 101 may be increased to increase the peripheral speed. In that case, the circular saw is used. The wall thickness must be increased to increase the rigidity of 101. Then, the resistance when cutting into the log increases, the cut becomes bad, and it becomes impossible to cut. Therefore, a circular saw cannot perform high-speed cutting. Moreover, since the diameter of the circular saw cannot be increased so much, it is impossible to cut a large number of log papers at one time.

In view of such circumstances, it is an object of the present invention to provide a log paper cutting device capable of cutting at high speed and with high efficiency and capable of cutting a large number of pieces at a time with a clean cut edge.

[0005]

According to another aspect of the present invention, there is provided a log paper cutting device including: (a) a support frame for supporting a drive pulley and a driven pulley, which are driven to rotate and rotate a motor, separated from each other; and the drive pulley. And a driven pulley that circulates at a high speed between the driven pulley and a driven pulley, and swings the support frame so as to move the band saw between a cutting position for cutting the log paper and a retracted position away from it. A cutting means comprising a moving mechanism, and (b) the log paper, in a direction perpendicular to the traveling direction of the band saw at the cutting position, from a position away from the band saw to a position beyond the band saw, a feed conveyor that intermittently feeds. It is characterized by consisting of.

According to a second aspect of the invention, in addition to the above configuration, (c)
The present invention is characterized by including a log holder that holds the log side of the log paper sent to the cutting position from the outer circumference of the log.

In addition to the above configuration, the invention of claim 3 is: (d) a stopper for positioning the stop position of the leading end of the log paper sent by the feed conveyor; and (e) a log sent to the cutting position. A roll supporter for supporting the paper by inserting the roll side to be cut of the paper into the core hole of the roll.

In the present invention, the stopper is a disc that rotates about its own axis, and four sets of the roll supports are attached to one side of the disc at equal intervals in the circumferential direction. Consists of a support pipe and a leaf projecting and retracting in the radial direction from the support pipe, the leaf protruding outward in the outer diameter direction by the pressure air injected into the pipe and closely contacting with the inner circumference of the core hole of the roll product. However, it is preferable that when the pressurized air is discharged, the spring immerses inward in the radial direction. In the present invention, the roll supporter is adapted to move intermittently in order of the cutting position, the take-out preparation position, and the take-out position by the rotation of the disc, and at the cutting position; the support pipe of the roll supporter. After inserting the core hole at the tip of the log paper into the outer circumference, expand the leaf to support the roll to be cut, cut the roll part supported by the band saw, and rotate to the take-out preparation position after cutting is completed. At the unloading preparation position; the leaf is contracted to eliminate the close contact with the roll core hole, and the leaf is rotated to the unloading position at the unloading position;
It is preferable that the cut roll product is taken out from the roll supporter by an extruding tool and is rotated to a cutting preparation position after the take-out is completed.

[0009]

According to the present invention, the log paper is cut by a band saw that revolves at a high speed. In the band saw, the driving pulley is wound around the driven pulley and tensile stress is applied, so the wall thickness can be made thin and the resistance at the time of cutting can be kept small, just by increasing the rotation speed of the driving pulley. High-speed cutting is possible.
Then, the log paper is fed by the feed conveyor and the stopper at a fixed size, and the roll side is held by the roll supporting device, so that the log paper can be cut into a good cut edge with an accurate size.
Also, by lengthening the band saw, it becomes possible to cut many log papers at once.

According to the second aspect of the present invention, since the log side is sandwiched by the log holders at the time of cutting, the log can be cut into a good cut with an accurate size.

According to the third aspect of the invention, since the stop position is determined by the stopper and the roll on the side to be cut is supported by the roll supporter, the roll can be reliably cut at a fixed size.

According to the fourth aspect of the present invention, the roll product can be reliably held by inserting it into the core hole of the roll product and projecting the leaf radially outward or retracting it inside, so that the roll product can be held when cut with a band saw. Since it does not move or hang down, the cut end has a clean end surface and can be cut at a right angle.

In the invention of claim 5, the four sets of roll holders rotate in the order of the cutting position, the take-out preparation position, and the take-out position, and the leaf of the roll support expands and contracts according to each position. Insertion, log cutting, and roll product removal can be performed continuously, enabling efficient cutting work.

[0014]

Embodiments of the present invention will now be described with reference to the drawings. 1 is a side view of a cutting device according to an embodiment of the present invention, FIG. 2 is a plan view of the cutting device, and FIG. 3 is II of FIGS.
FIG.

1 to 3, reference numeral 1 is a band saw, which is a thin band saw made of SKS alloy tool steel or the like. The band saw 1 is wound around a drive pulley 2 and a driven pulley 3, and the drive pulley 2 is rotationally driven by a motor 4. The drive pulley 2 and the driven pulley 3 are rotatably supported on the lower surface of the support frame 5, and the motor 4 is attached to the base end portion of the upper surface of the support frame 5. The motor 4 and the drive pulley 2 are connected by a gear train or a winding transmission mechanism.

The support frame 5 is swingably supported by a housing 7 by a trunnion shaft 6, and is swingable by an arbitrary swing mechanism 8. As shown in FIG. 3, as the swing mechanism 8, the other end of a link 8b, one end of which is connected to the end of the rotary drum 8a, is pivotally attached to the tip of the support frame 5, and the rotary drum 8a is rotated by a motor or the like. The configuration and the like are suitable, and it is possible to reciprocate between a retracted position shown by a solid line and a cutting position shown by an imaginary line.

A feed conveyor 10 has a function of intermittently feeding the log paper R placed on the bed 11 with a pusher 13 connected to a chain 12, and the feed direction is orthogonal to the band saw 1. It is the direction to do. Bed 11 of feed conveyor 10
A log holder 20 is provided at the tip of the. As shown in FIG. 7, the holder 20 is a recess for receiving the log paper R.
A pedestal 22 having a 21 formed therein and a press table 23 having a similar recess 21 formed therein
And a cylinder 24 that raises and lowers the press table 23. The cylinder 24 pushes up the press table 23 slightly to push in the log paper R, and the press table 23 is lowered to clamp the leading end of the log paper R from above and below. Has been done.

A stopper 30 is provided at a position facing the tip of the feed conveyor 10. The stopper 30 comprises a disk 31 and a drive motor 32 for rotating the disk 31, and the surface of the disk 31 facing the feed conveyor 10 is a stopper surface. In addition, four sets of two roll supports 40 are attached to the disc 31 at positions equally divided into four in the circumferential direction.

The roll supporter 40 will be described with reference to FIGS. FIG. 4 is a vertical cross-sectional view of the roll supporter 40, and FIG. 5 is a view taken in the direction of the arrow V in FIG. . A base portion of a support pipe 41 is attached to the disc 31 via a spring cushion 42, and a body portion of the support pipe 41 projects from the disc 31 to the right side in the drawing. This support pipe 41
Three slits 43 are formed in the body portion of each of the slits, and lugs 44 are inserted into and retractable from the slits 43, and leaves 45 having an arcuate cross section are fixed to the outer ends of the lugs 43. A base 46 into which a high-pressure air supply joint is screwed is fixed to the inner circumference of the base of the support pipe 41, and an introduction pipe 47 is connected to the base 46. The introduction pipe 47 is located on the inner circumference of the body of the support pipe 41, and the outer circumference of the introduction pipe 47 is covered with a rubber bag 48. When high-pressure air is injected into the introduction pipe 47, the high-pressure air is discharged from the vent hole 49 formed in the pipe wall to inflate the rubber bag 48, and the leaf 45 is projected outward in the radial direction. When the high-pressure air is removed, the leaf 45 is contracted by the coil spring 50 wound around the outer circumference of the three leaves 45 so that the leaves 45 are immersed inward in the radial direction.

In FIG. 3, is a cutting position, is an ejection preparation position, is an ejection position, is a cutting preparation position, and is a disc.
By rotating 31 intermittently, each roll support 40
Is intermittently rotated and stopped in this order. Less than,
The operation at each position will be described with reference to FIG. At the cutting position; with the leaf 45 of the roll support 40 contracted, the log paper R is pushed by the feed conveyor 10 and the tip of the log paper R is inserted into the roll support 40. The leading end of the inserted log paper R hits the disc 31 to position the cutting position, and the feed conveyor 10 stops feeding. Then, the leaf of the roll supporting device 40 is expanded and closely supported on the inner circumference of the core hole at the tip of the log paper R to support it. This completes the preparation for cutting, and the band saw 1
When the support frame 5 is lowered while orbiting at a high speed, the tip end of the log paper R is cut by the band saw 1, and the roll paper product r is obtained. The state at this time will be described with reference to FIG. 8. Since the thin band saw 1 is used for cutting, the resistance on the log paper side is small and it can be cut into a neat cut. Since cutting is easy, high-speed cutting is possible, Work efficiency is improved. In addition, in the illustrated example, two pieces of the lock paper R are cut, but three or more pieces are also possible, and more rows can be formed depending on the length of the band saw 1. At the take-out preparation position; When the roll paper product r that has been cut is held and rotated clockwise by 90 °, it comes to the take-out preparation position. At this point, high pressure air is removed from the roll support 40 to shrink the leaf 45 and cut the edge of the roll paper product r from the inner circumference of the core hole. At take-out position; edged roll paper product r
Rotate it 90 ° clockwise while it is still in the take-out position.
Push in the direction of 62. The extruded roll paper product r is packed by a payout conveyor 62 at a packaging station (not shown).
Etc. to the next process. Cutting preparation position: After taking out the roll paper product r,
The roll support 40 rotates 90 ° clockwise and waits for the next cutting position. Then, the cutting work is rotated to the cutting position at the timing of the cutting work, and the above work is repeated.

Next, another embodiment of the present invention will be described.
FIG. 9 is a side view of a cutting device according to another embodiment of the present invention,
FIG. 10 is a front view of the same. Although the support frame 5 is arranged substantially horizontally in the above-mentioned embodiment, this embodiment is different in that the support frame 5 is arranged substantially vertically, and the other points are substantially the same as the previous embodiment. . Therefore, the same reference numerals are used for substantially the same parts. The base end of the support frame 5 is swingably supported by a fulcrum pin 71, and when the swing mechanism 8 is driven, it reciprocates between a cutting position shown by a solid line and a retracted position shown by an imaginary line. ing. Reference numeral 72 is a receiver and a log holder for the log paper R, and a gutter-shaped feed table (not shown) is provided continuously with this. Reference numeral 73 denotes a feed conveyor, which is a chain arranged so as to rotate in a direction perpendicular to the band saw 1, a pressing tool 74 attached to the chain, a shaft 75 for driving the chain to rotate, a sprocket 76, and a motor 77.
And so on. Note that it is optional whether the stopper 30 and the roll supporter 40 are provided. Even in the case where the band saw 1 travels in the vertical direction as in this embodiment, the log paper R can be cut at a high speed in the same manner as in the above embodiments.

[0022]

According to the present invention, it is possible to provide a log paper cutting device capable of cutting at high speed and with good efficiency and capable of cutting a large number of papers at a time with a clean cut edge.

[Brief description of drawings]

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

2 is a plan view of the cutting device of FIG. 1. FIG.

FIG. 3 is a view taken along the line III in FIGS.

FIG. 4 is a vertical sectional view of a roll supporter 40.

5 is a view taken in the direction of the arrow V in FIG. 4, in which the upper side of the figure is in a state where the leaf is expanded, and the lower side in the figure is in a state where the leaf is contracted.

FIG. 6 is an explanatory diagram of log cutting work.

7 is a rear view of the log holder 20. FIG.

FIG. 8 is a perspective view showing a log cutting operation.

FIG. 9 is a side view of a cutting device according to another embodiment of the present invention.

FIG. 10 is a front view of a cutting device according to another embodiment of the present invention.

FIG. 11 is an explanatory diagram of a conventional cutting device.

[Explanation of symbols]

 1 band saw 2 drive pulley 3 driven pulley 4 motor 5 support frame 8 swing mechanism 10 feed conveyor 20 log holder 30 stopper 40 roll holder 72 log holder 73 feed conveyor

Claims (5)

[Claims] (A) A support frame that supports a drive pulley and a driven pulley that are driven to rotate and rotate by a motor so as to be spaced apart from each other, and a band saw that is wound between the drive pulley and the driven pulley and revolves at a high speed. A cutting means comprising a swing mechanism that swings the support frame so as to move the band saw between a cutting position for cutting the log paper and a retracted position away from the log paper; and (b) the log paper. A log paper cutting device, comprising: a feed conveyor that intermittently feeds from a position away from the band saw to a position beyond the band saw in a direction perpendicular to the traveling direction of the band saw at the cutting position. 2. The log paper cutting device according to claim 1, further comprising: (c) a log holder for holding and holding the log side of the log paper sent to the cutting position from the outer circumference of the log. . 3. (d) A stopper for positioning the stop position of the tip of the log paper sent by the feed conveyor,
(e) A roll supporter for supporting the roll paper to be cut in the log paper sent to the cutting position by inserting it into the core hole of the roll. Log paper cutting device. 4. The stopper is a disc that rotates about its own axis, and four sets of the roll supports are attached to one side of the disc at equal intervals in the circumferential direction. , A support pipe and a leaf protruding and retracting in the radial direction from the support pipe, the leaf protruding outward in the outer radial direction by the pressure air injected into the pipe and closely contacting with the inner circumference of the core hole of the roll product. The cutting device according to claim 3, wherein when the compressed air is discharged, the compressed device is retracted radially inward. 5. The roll supports of the four sets are adapted to move intermittently in order of a cutting position, a take-out preparation position and a take-out position by the rotation of the disc, and at the cutting position; After inserting the core hole at the tip of the log paper into the outer circumference of the support pipe of the support, expand the leaf to support the roll to be cut, cut the roll part supported by the band saw, and take out after cutting is completed. Rotate to the preparation position, at the take-out preparation position; contract the leaf to eliminate close contact with the roll core hole, rotate to the take-out position, and at the take-out position; roll the cut roll product by the extruder. 5. The cutting device according to claim 4, wherein the cutting device is taken out of the supporting device and is rotated to a cutting preparation position after the taking-out is completed.