JPH089158B2 - Web guide device for continuous cutting 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 web guiding device in a continuous cutting device.

[0002]

2. Description of the Related Art There is a continuous cutting and accumulating device which unwinds a winding base paper and slits it in a longitudinal direction, and then cuts the web laterally in a predetermined cutting length to continuously accumulate the web. The cutting device in this type of continuous cutting and accumulating device holds a web between a pair of rolls and guides it to a conveyor inlet through a web passage near a knife body that has a rotary blade and rotates at high speed around an axis. As it goes, the web is sequentially cut into a predetermined cutting length while the web is pulled between the pair of rolls and the conveyor.

[0003]

In the conventional cutting device,
After the web is cut to a specified cutting length by the rotating blade of the knife body that rotates at high speed, the web is conveyed to the conveyor inlet through the web passage near the knife body, and the tip of the web is conveyed from the conveyor to the conveyor. It is pulled in and pinched.

However, after cutting the web with a rotary blade,
The web on the rear side of the
When guiding to the transfer port side of the conveyor,
A negative pressure condition is generated on the rear side of the rotary blade protruding from the outer peripheral surface of the
The leading edge of the web on the rear side is
There is a risk that the web will be attracted to the if-body side and be wrapped around the knife body. Also, even if the tip of the web can pass near the knife body without being wrapped around the knife body, the knife body is rotating at high speed near the web passage. It has the drawback that it moves erratically and is not smoothly guided to the transfer port of the conveyor.

In view of the above conventional problems, the present invention provides a web guide device in a continuous cutting device which can prevent the web from being wrapped around a knife body and can smoothly and reliably guide the front end of the web to a transfer port of a conveyor. The purpose is to do.

[0006]

The present invention is directed to a pair of rolls.
The web 10 is sandwiched by 8, 9 and has a rotating blade 13 protruding from the outer peripheral surface , and the conveyor 10 is inherited via a web passage 21 in the vicinity of a knife body 15 which rotates at high speed around an axis. mouth
While being guided to 22, while the web A is pulled between the pair of rolls 8 and 9 and the conveyor 10, the web A is sequentially cut to a predetermined cutting length by the rotary blade 13 of the knife body 15. in a continuous cutting apparatus that, Nai
A web A passing through the web passage 21 on the outer peripheral surface of the body 15.
Is separated from the outer peripheral surface of the knife body 15 by the air flow.
The outer circumference of the knife body 15 during its rotation so that
A protrusion 18 for generating the air flow is provided near the surface.
Installed and blows air toward the transfer port 22 of the conveyor 10.
And ejects the front end of the web A passing through the web passage 21.
Guide along the air to the inlet 22 of the conveyor 10 and insert.
Web guide means 19 and 23 are provided.

[0007]

The web A is nipped by the pair of rolls 8 and 9, and the web A is guided through the web passage 21 in the vicinity of the knife body 15 which rotates at a high speed around the axis to the transfer port 22 of the conveyor 10 while With the web A being pulled between the rolls 8 and 9 and the conveyor 10, the web A is successively cut into a predetermined cutting length by the rotary blade 13 of the knife body 15.

Web A is a wafer near the knife body 15.
Knife body 15 that rotates at high speed when passing through the passage 21
By the protruding portion 18 of the, the vicinity of the outer peripheral surface of the knife body 15
An air flow is generated in the
It is separated from the outer peripheral surface of the if-body 15. Because of this, times
Web A is knife body 15 due to the negative pressure from the blade 13.
It never wraps around. On the other hand, the web guide means 19,23
Blows air toward the transfer port 22 of the conveyor 10.
Then, the tip of the web A is moved along the jet air.
Guide and insert into the transfer port 22 of the conveyor 10. Therefore,
Smoothly and securely attach the tip of the web A to the transfer port 22 of the conveyor 10.
I can really guide you.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an overall layout view of a continuous cutting and accumulating device equipped with a continuous cutting device according to the present invention, which mainly detects the shaft-attached portion 1 of the winding base paper A and the tension of the base paper A fed from the shaft-attached portion 1. Tension detection unit 2, vertical direction cutting unit 3 for slitting the base paper A in the vertical direction, horizontal direction cutting unit 4 for cutting the slit web in the horizontal direction, and overlap the cut web in sequence. -A wrap portion 5, a stacking portion 6 for stacking and stacking webs from below, and the like.

A plurality of winding base papers A are rotatably attached to a shaft attachment portion 1 by a support shaft (not shown). A braking brake is also provided on each support shaft, and the tension of the fed base paper A is detected by the detection roll of the tension detection unit 2, and the brake is generated by a control device (not shown). Under control, each base paper A is rewound and fed out in a predetermined tension state. The vertical cutting part 3 is
This is for cutting the base paper A fed from 1 in the longitudinal direction so as to form a plurality of strips (hereinafter referred to as the web A). A plurality of slitter knives arranged at predetermined intervals in the lateral direction are used. I have it. Each slitter knife rotates at a speed higher than the moving speed of the web A.

The lateral cutting section 4 is for laterally cutting the moving web A into a predetermined length, and as shown in FIG. 2, the main part is cut by the rotary cutter 7. It is configured with a draw roll 8 and a nipple roll on the upper side.
The first conveyor 10 is arranged on the lower side, and the first conveyor 10 is arranged on the lower side. The draw roll 8 has a cylindrical shape and is arranged laterally so as to pull out the plural webs A and convey and feed the web A to the rotary cutter 7, and by a drive unit (not shown). It is configured to be rotationally driven around the axis.

On the upper side of the draw roll 8, a nipple roll is provided to firmly sandwich the web A with the draw roll 8.
Rule 9 is rotatably arranged. The nipple roll 9 has a cylindrical shape whose surface is wound with rubber, and in order to prevent wrinkles from being generated on the web A, a plurality of spirally wound grooves 11 are formed on the outer peripheral surface about the center in the axial direction. Has been done. A pair of upper and lower feeder rollers 12 are provided between the lateral cutting portion 4 and the drawer roller 8. The feed roll 12 holds the web A lightly from above and below,
It is configured to convey and supply to the rotary cutter 7 at a speed higher than that of the rule 8.

As shown in FIG. 2, the rotary cutter 7 is composed of a top knife 13 serving as a rotary blade and a bottom knife 14 serving as a fixed blade. Top knife 13
Is mounted on a cylindrical top knife body 15 that is rotatably supported around a horizontal axis so that the knife interval can be adjusted. A spiral groove 16 is formed on the outer peripheral surface of the top knife body 15 at appropriate intervals,
A spring 17 is wound around the groove 16 so that about half of the wire diameter fits into the groove 16, and by this spring 17, the outer peripheral surface of the top knife body 15 is provided with protrusions at appropriate intervals.
18 are formed.

The protrusion 18 is the height of the top knife body 15.
When rotating at high speed, air is generated near the outer peripheral surface by centrifugal force.
A flow is generated and the web A is topped by this air flow.
By separating from the outer peripheral surface of the knife body 15,
Winding of the outer knife of the top knife body 15 of web A
Prevents sticking and was cut between knives 13 and 14.
Immediately after, the tip of the web A is behind the top knife 13.
The negative pressure generated on the
Of the top knife body 15 that is attracted and rotates at high speed
Even if you touch the protrusions 18,
When the contact is made, the projection A causes the web A to
It is designed to bounce off to the passing table 19 side. In the embodiment, the protrusion 18 is formed by the spring 17, but the present invention is not limited to the spring 17.

The bottom knife 14 is a top knife body-15
It is attached to the upper end of a bottom knife body-20 disposed below the bottom knife body 20, and is configured so that the distance from the top knife 13 can be adjusted. On the upper surface of the bottom knife body-20,
A web passing guide portion 19 is provided in the vicinity of the top knife body-15 so as to form a web passage 21. The web passing guide portion 19 is formed by recessing the upper surface side in an arc shape from the tip end side of the bottom knife 14 toward the receiving opening 22 side of the first conveyor 10, and the web passing guide portion 19 is A plurality of air nozzles 23 are provided in the lateral direction so as to open toward the transfer port 22 of the conveyor 10.

The air nozzle 23 blows out air toward the transfer port 22 side of the first conveyor 10 to guide the web passing.
19 upper surface side of the negative pressure state, the U E Bed passage 21 through the distal end portion of the web A to be transported to the first conveyor 10 side guided along the upper surface of the web passing guide portion 19, the web A The tip portion is guided and inserted into the succession port 22 of the first conveyor 10 along the jet air jetted from the air nozzle 23. The air pressure ejected from the air nozzle 23 is appropriately adjusted according to the rotation speed of the first conveyor 10 by an air valve 25 provided in a pipe 24 communicating with the air nozzle 23.

Therefore, when the web A is fed to the rotary cutter 7 side while being sandwiched by the draw roll 8 and the nip roll 9 from above and below, the feed roll 12,
Through the web passage 21 via the bottom knife 14, the top knife body 15 is sent to the receiving port 22 Kaho of the first conveyor 10 by a predetermined cutting length during one rotation. At this time, close to the outer peripheral surface of the top knife body 15 that rotates at high speed.
An air flow due to centrifugal force is generated by the protrusion 18 by the side.
It is generated, and the web A is top knife with this air flow
Since it is separated from the body 15, it can be easily
Web A wraps around the outer surface of the top knife body 15.
There is no. Therefore, whether the outer peripheral surface of the top knife body 15
The top knife 13 protruding from the top knife body 15
The rear side of the top knife 13 when rotating at high speed with
Despite the negative pressure on the top of web A
It is possible to prevent wrapping around the knife body 15.
Wear. In addition, if the negative pressure generated behind the top knife 13
As a result, the tip of the web A is the top knife body 15
Even if something is drawn to your side,
Since there is a protrusion 18 on the outer peripheral surface of the body 15, the web A
When the protrusion 18 contacts the protrusion 18, the protrusion 18
Bounced away from the knife body 15
It And then, the web A is the top knife body
-15 due to the air flow generated near the outer peripheral surface of
Since it can be separated from the knife body 15,
Wrapped around the knife body 15 side
There is no.

On the other hand, from each air nozzle 23 to the first conveyor
-If air is blown out to the inlet 22 side of the
The upper surface side of the web passing guide portion 19 is negative due to the ejection of the arch
Since the pressure is applied, the leading edge of the web A passes through the web passage 21.
The web passing guide section 19 side
Ku. Further, the web passage 21 on the upper surface side of the web passing guide portion 19
The leading end of the web A that has passed through the
The outlet 22 of the 1st conveyor 10 along with the jetted air
Since it will be guided to and inserted into,
Without the tip of the web A moves unstable under the influence of IF body 15 can smoothly and reliably guided to the leading end portion of the web A to Keiju port 22 of the first conveyor 10.

The first conveyor 10 is composed of a belt conveyor provided with a pair of upper and lower belts 26 so as to sandwich and convey the web A in a sliding state, and each belt 26 is a draw roller. In order to apply an appropriate tensile force to the web A between the roll 8 and the nipple roll 9,
It is designed to rotate in the transport direction at a speed faster than the peripheral speed of 8. In the middle of the first conveyor-10, a horizontal cutting part
Web A with 4 top knives 13 and bottom knives 14
A pair of upper and lower pulling rolls 27 are provided so as to more strongly pull the moving web A in a tensioned state while nipping the web A at the same time as cutting.

Each of the tension rolls 27 was cut at the same time as the web A was cut.
Of the first conveyor 10 is sandwiched by the belt 26 of the first conveyor 10 via the side of the conveying section, and is arranged at a lower side from the transverse cutting section 4 by the cutting length of the web A. Further, each tension roll 27 is rotated by a turning operation of a handle provided at the shaft end of a moving gear that engages with a fixed rack gear,
It is configured to be movable and adjustable in the moving direction of the web A according to the cutting length of the web A.

Therefore, if the front end of the web A enters the receiving port 22 of the first conveyor 10 through the upper surface side of the web passing guide portion 19, the web A is pinched by the belt 26 from the upper and lower sides and the pulling roll 27 side. Is transported to. At this time, there is relative slippage between the web A and the belt 26, and the web A is kept in a tension state where it does not loosen. Then, the tip of the web A reaches the tension roll 27, and the tension roll 27
When it is pinched from above and below via the belt 26,
There is no slippage between the belt 26 and the web A via the belt 26.
Is pulled more strongly.

On the other hand, since the pulling roll 27 corresponds to the cutting length of the web A, substantially simultaneously with the pulling by the pulling roll 27, the top knife 13 and the bottom knife 14 of the transverse cutting portion 4 are almost at the same time. The web A is laterally cut between and. For this reason, if the tension by the tension roll 27 is set to be sufficiently strong, the web A is made by the top knife 13 and the bottom knife 14.
Web A can be securely and shredded by applying a slight external force to
It is possible to cut into groups. Therefore, the top knife
Since it is not necessary to directly contact 13 and the bottom knife 14, it is easy to adjust the gap between them and it is not necessary to keep each cutting edge sharp.

Further, since the pulling roll 27 is arranged in accordance with the cutting length of the web A so as to hold the front end of the web A, for example, as compared with the case where the middle part of the web A is held at the same time as the cutting. Since it is not necessary to move the tension roll 27 in the holding direction, the support structure thereof can be simplified. Moreover, since the pulling roll 27 is movable according to the cut length of the web A, there is an advantage that it can immediately respond to the cut length of various sizes.

A web A (hereinafter referred to as a sheet A) which has been cut into a sheet shape by being cut to a predetermined cutting length by the lateral cutting section 4.
Is pinched by a pair of upper and lower belts 26 of the first conveyor 10, and is conveyed to the pinch roll 28 side while keeping an appropriate space between it and the succeeding sheet A. The pinch roll 28 is composed of a cylindrical roll and is movably clamped at an appropriate position, and via the conveyer side of the belt 26 of the first conveyor 10,
A pair of upper and lower sheets are provided to firmly sandwich the sheet A at the transporting speed of the first conveyor 10 and transport it to the overlap portion 5 to supply it.

As shown in FIG. 3, the overlap portion 5 includes a pair of upper and lower kicker rolls 29, a pair of upper and lower second conveyors 30, and first and second conveyors 10 and 30. It is composed of an upper overlap roll 31 and a lower overlap roll 32 which are arranged between them. Kicker roll 29
Rotates at about the same speed as the first conveyor 10 during normal rotation, or at a preferable speed,
It is configured to rotate faster than the conveyor 10 and to rotate at a reduced speed in the space between the sheets A.

The second conveyor 30 comprises a belt conveyor, the belt 33 of which is arranged to rotate at a slower speed than the belt 26 of the first conveyor 10. The second
The conveyor 30 is provided with a catch roll 34 so as to firmly sandwich the sheet A via the belt 33 on the side of the conveyor. The upper overlap roll 31 is formed with an arcuate recess 35 at a proper position on the peripheral surface thereof, and the lower overlap roll 32 is provided with a plurality of claws 36 projecting therefrom. The upper overlap roll 31 and the lower overlap roll 32 are configured to rotate in the conveying direction in synchronization so that the recess 35 and the pawl 36 thereof coincide with each other during rotation.

In this overlap section 5, the leading edge of the preceding sheet A passes between the upper overlap roll 31 and the lower overlap roll 32, 1 conveyor
Belt of the second conveyor-30 that rotates at a speed slower than 10.
When the sheet A enters into the space 33 and is firmly sandwiched by the pair of upper and lower catch rolls 34, the rear end of the sheet A is in the lower opening.
It is lifted by the claw 36 of the ball roll 32. At this time, the succeeding sheet A sandwiched between the kicker rolls 29
Is rapidly fed by the increased speed rotation of the kicker roll 29, and is inserted into the lower side of the trailing end of the preceding sheet A.

Therefore, the claws of the lower overlap roll 32 are
Since the lifting operation by the 36 and the feeding operation by the acceleration of the kicker roll 29 are performed in synchronization, the leading end of the succeeding sheet A is placed below the trailing end of the preceding sheet A. Insert each sheet A sequentially without any interference
You can wrap it. Also pinch roll 28,
Since the kicker roll 29 and the catch roll 34 can be moved to the proper positions according to the length of the sheet A, if the length of the sheet A is different, the respective rolls can be moved accordingly. The position can be adjusted, and sheets A of various lengths can be freely adapted.

A pinch roll 28 and a kicker roll 29
The catch roll 34 is configured to be moved by turning a gear that engages with the fixed rack gear with a handle. As shown in FIGS. 4 and 5, the accumulating unit 6 is
A pair of upper and lower timing rolls 37 provided on the rear end side of the second conveyor 30, an accumulation conveyor 38 and a carry-out conveyor 39 provided on the lower side of the second conveyor 30, and an intermittent circulation circuit. Multiple moving stoppers-40 and air nozzle
It consists of 41.

The timing roll 37 is normally rotated in the conveying direction at the speed of the second conveyor 30 or at a slightly slower speed so as to convey the overlapped sheet A to the accumulating conveyor.
38 configured to feed onto an integrated conveyor-38
If the upper sheet A reaches the stacking set number, kicker roll 29
Similar to the driving method of (1), it is configured to rotate at an increased or decreased speed.
That is, when the set number is reached, the revolution differential gear speeds up the timing roll 37 to unwrap the sheet A and decelerates to move the preceding sheet A and the succeeding sheet. The variable cam is configured to perform an operation for generating an appropriate gap with the sheet A.

Each stopper 40 has four sprockets 4
Two chains of chains 44,45 wound around 2,43 are mounted for translation. The stopper 40 is constructed so as to rotate synchronously with the rotary cutter 7 via an index (not shown), and the sheet A
When the stacking number is set, the stacking sheet C is configured to be operated at substantially the same time as the timing roll 37.

When the sheets A are stacked in the stacking section 6, the stopper 40 is stopped in the upward projecting state at the stacking position B at the end of the stacking conveyor 38, as shown in FIG. . The sheet A, which has moved to the stacking position B by the rotation of the stacking conveyor 38, comes into contact with the stopper 40 at its leading edge and stops on the stacking conveyor 38. Then the succeeding sheet A
Are also sequentially fed onto the stacking conveyor-38, but each sheet A
Are in the overlapped state, they are sequentially inserted under the preceding sheet A and are accumulated.

When the number of the sheets A on the stacking conveyor 38 reaches the set number, the timing roll 37 decelerates and the preceding sheet A and the succeeding sheet A are decelerated as shown in FIG. Create a gap between. At the same time, the stopper 40 moves out the conveyor 39
Then, the next stopper 40 moves to the stacking position B and stops while projecting on the stacking conveyor 38. Therefore, the stacked paper C is carried out from the stacking conveyor 38 by the discharging conveyor 39.
The sheet A can be carried out to and the subsequent sheets A can be collected by the next stopper 40.

During the stacking at the stacking position B, air is jetted from the air nozzle 41 to the upper surface of the succeeding sheet A. As a result, the rear end side of the stacking sheet C in the stacking state floats up, so that the frictional resistance at the time of inserting the succeeding sheet A can be reduced, and the ends of each sheet A can be aligned and stacked in order. it can. Therefore, it is very effective when a large amount of paper is stacked or when thin paper is stacked.

[0035]

According to the present invention, the pair of rolls 8 and 9 are used.
The rotary blade 13 that clamps the web A and projects from the outer peripheral surface.
Of the knife body 15 that has a high-speed rotation about its axis.
Guide to the transfer port 22 of the conveyor 10 via the web passage 21 nearby
While going, the pair of rolls 8 and 9 and the conveyor 10
With the web A pulled between the knife body
The web A is sequentially cut to a predetermined cutting length by 15 rotary blades 13.
In a continuous cutting device designed to cut, the knife body
-The web A passing through the web passage 21 is aired on the outer peripheral surface of -15.
Flow away from the outer peripheral surface of the knife body 15.
As shown in FIG.
The protrusion 18 for generating the air flow is provided on the
Air is blown out toward the inlet 22 of the Nveyer 10 and
The tip of the web A passing through the web passage 21 becomes the jet air.
A web to guide and insert into the transfer port 22 of the conveyor 10
Since the guide means 19 and 23 are provided, the following remarkable effects are obtained.
Play the fruit. In the vicinity of the outer peripheral surface of the knife body 15 that rotates at high speed
Is d ah flow has occurred by the projection portion 18, the d
The web A from the knife body 15 to be between away in the earth flow
The rotary blade 13 protruding from the outer peripheral surface of the knife body 15.
However, when rotating at high speed with the knife body 15,
Negative pressure on the rear side of the rotary blade 13 despite occurs, the U
Outside the peripheral surface of the knife body 15 of the web A through E Breakfast passage 21
It is possible to prevent wrapping around. Also, if the negative pressure generated on the rear side of the rotary blade 13
And the tip of the web A sucks to the knife body 15 side.
Even if, as is, the outer periphery of the knife body -15
Since the surface has the protrusions 18, the web A contacts the protrusions 18.
When the web 18 is struck,
Splashing in a direction away from the can carry bus that. Moreover, after that, the protrusion 18 causes the knife body 15
The air flow generated near the outer peripheral surface of the web A
Since it can be separated from the knife body 15 ,
Once again, the web A is drawn to the knife body 15 side
What is winding memorial can also be prevented. On the other hand, air is directed toward the inlet 22 of the conveyor 10.
The web guiding hand stages 19 and 23 for ejecting formed, the web passage 21
The leading end of the web A that has passed through is passed through the web guide means 19,23.
Air jetted from the conveyor to the transfer port 22 of the conveyor 10
Guided to insert into the Keiju port 22 of the conveyor 10 I along to over
Since the way, the leading end portion of the web Bed A is rotated at a high speed
It is also possible to move unstable under the influence of the knife body 15
Circle the tip of the web A to the transfer port 22 of the conveyor 10.
It can guide smoothly and reliably , and inherits the conveyor 10.
Also prevent damage such as the tip of the web A bend Re folding mouth 22 side
can do.

[Brief description of drawings]

FIG. 1 is an overall layout view of a continuous cutting and accumulating device equipped with a continuous cutting device according to an embodiment of the present invention.

FIG. 2 is a sectional side view of a continuous cutting device.

FIG. 3 is a side view of an overlap portion.

FIG. 4 is a side view of a stacking unit.

FIG. 5 is a side view for explaining the stacking operation of the stacking unit.

[Explanation of symbols]

 4 Lateral cutting part 8 Draw roll 9 Nip roll 10 1st conveyor 10 13 Top knife (rotary blade) 14 Bottom knife (fixed blade) 19 Web passing guide part 21 Web passage 22 Receiving port 23 Air nozzle A web

Claims (1)

[Claims] 1. A knife body (15) having a rotary blade (13) which holds a web (A) between a pair of rolls (8) and (9) and which projects from an outer peripheral surface, and which rotates at high speed around an axis. While guiding the conveyor (10) through the web passage (21) in the vicinity of the conveyor (10), the pair of rolls (8) (9) and the conveyor (1)
In a state where the web (A) is pulled between (0) and the rotary blade (13) of the knife body (15), the web (A) is sequentially cut to a predetermined cutting length in a continuous cutting device. Na
On the outer peripheral surface of the if-body (15), weave through the web passage (21).
The web (A) moves outside the knife body (15) due to the air flow.
When the knife body rotates, the knife body is separated from the peripheral surface.
-To generate the air flow near the outer peripheral surface of (15)
The protrusion (18) of the
A web that once ejected air and passed through the web passage (21)
Conveyor with tip of (A) along the jet air (10)
Web guide means (19) (23) for guiding and inserting into the receiving port (22) of
A web guide device in a continuous cutting device, which is provided with.