JP6621139B2 - Paper cutting unit - Google Patents

Description

  The present invention intermittently transports a product having a margin pattern and products arranged in a predetermined pattern, and cuts the paper into a product and a margin portion by cutting the paper at right angles to the transport direction while transport is stopped. The present invention relates to a sheet cutting unit to be separated.

  This type of paper cutting unit is disposed in parallel with the upstream conveying roller pair and the upstream conveying roller pair that are arranged vertically across the conveying path and across the conveying path. Arranged below the conveying path between the upstream conveying roller pair and the downstream conveying roller pair, the driving mechanism for rotationally driving the upstream and downstream conveying roller pairs, and the upstream conveying roller pair and the downstream conveying roller pair. A lower fixed blade extending across the conveying path at a right angle, an upper movable blade disposed above the lower fixed blade and facing the upper fixed blade, and an elevating mechanism for raising and lowering the upper movable blade to cut the paper And a control unit for controlling the operation of the drive mechanism and the lifting mechanism.

  The control unit of the paper cutting unit is preliminarily input with paper cutting information (including information such as paper size, product size, and product position in the paper), and the paper cutting unit transfers the paper to the transport path. The paper is cut along the boundary line between the product and the margin part adjacent to the product while the transport is stopped, and the separated product is sent to the downstream side by the downstream transport roller pair, while the separated margin The portion is dropped from between the lower fixed blade and the downstream conveying roller pair or between the lower fixed blade and the upstream conveying roller pair and removed from the conveying path.

  By the way, in this sheet cutting unit, when the conveyance direction length of the last margin part is larger than the interval between the nip position of the upstream conveyance roller pair and the cutting edge (cutting position) of the lower fixed blade, After the last margin part and the product adjacent in front of it are separated, the last margin part is sent downstream by the upstream conveying roller pair, and the lower roller and the lower fixed part of the upstream conveying roller pair It is supported between the blades and may remain on the transport path without falling.

  If left unattended, when the next sheet is cut, the remaining margin at the end overlaps the paper and cutting cannot be performed accurately, or the last margin is conveyed along with the product. Problem arises.

  Therefore, in the prior art, when the conveyance direction length of the last margin portion is larger than the interval between the nip position of the upstream conveyance roller pair and the cutting position of the lower fixed blade, The last margin portion is finely cut and divided until the length in the conveyance direction substantially corresponds to the interval, and the upstream conveyance roller pair is moved 90 times from the time when the last margin portion passes the nip position of the upstream conveyance roller pair. There has been proposed a sheet cutting unit that is rotated by more than ° (for example, see Patent Document 1).

  However, also in this conventional sheet cutting unit, the length L in the conveyance direction of the last margin portion is set to M between the nip position and the cutting position, and the downstream end of the upstream conveying roller pair and the cutting position When N ≦ L ≦ M, the last margin after separation is supported between the upstream conveying roller pair and the lower fixed blade and may not fall from the conveying path. It was.

JP 2013-82522 A

  Accordingly, an object of the present invention is to provide a sheet cutting unit that can reliably remove the last margin portion of a sheet from the sheet conveyance path.

  In order to solve the above problems, according to the present invention, a sheet having products and a margin portion arranged in a predetermined pattern is intermittently conveyed, and the sheet is cut at right angles to the conveying direction while the conveyance is stopped. An upstream conveyance roller pair and a downstream conveyance roller pair, which are separated into a product and a margin portion, and are spaced apart from each other in the conveyance direction and transversely cross a paper conveyance path, A conveying roller pair driving mechanism that rotationally drives the upstream conveying roller pair and the downstream conveying roller pair, and the upstream and downstream conveying roller pairs, and the conveying path is disposed below the conveying path. A fixed cutting blade extending across a right angle; a movable cutting blade disposed above the fixed cutting blade; and the movable cutting blade being moved up and down to move the fixed cutting blade and the movable cutting blade A sheet cutting device comprising: a cutting blade driving mechanism that cuts a sheet between cutting blades; and a control unit that controls operations of the conveying roller pair driving mechanism and the cutting blade driving mechanism based on previously input sheet cutting information. In the unit, the downstream conveyance roller pair is supported, and a fixed position where a gap between the downstream conveyance roller pair is aligned with the conveyance path and a gap between the downstream conveyance roller pair are spaced upward from the conveyance path. An elevating mechanism that elevates between the elevating position and the operation of the elevating mechanism is controlled by the control unit, and the conveyance direction length L of the last margin part is the upstream conveying roller When the distance between the pair of gaps and the cutting edge of the fixed cutting blade is R, and the distance between the downstream end of the upstream conveying roller pair and the cutting edge of the fixed cutting blade is D, when D ≦ L ≦ R, 1) When the boundary line between the last margin and the product adjacent to the front reaches the cutting edge of the fixed cutting blade, the sheet is not cut but is further cut by a predetermined distance downstream. (2) the downstream conveying roller pair rises from the fixed position to the raised position, (3) the sheet is conveyed in the opposite direction by the predetermined distance, and (4) the downstream conveying roller pair is A sheet cutting unit, wherein the sheet cutting unit is lowered from the raised position to the fixed position, and (5) the sheet is cut and the product adjacent to the front is separated from the remaining margin portion at the end. Provided.

According to a preferred embodiment of the present invention, the height of the raised position of the downstream conveying roller pair from the conveying path can be adjusted.
According to another embodiment of the present invention, the elevating mechanism is disposed on the upper side or the lower side of the conveyance path, extends across the conveyance path and parallel to the fixed cutting blade, and both sides of the conveyance path. A pair of support plates pivotably attached to the shaft around the shaft, and the pair of downstream transport rollers are supported between the pair of support plates, and A pair of support plates are oscillated between a first position where the downstream conveying roller pair is disposed at the fixed position and a second position where the downstream conveying roller pair is disposed at the raised position. A support plate swing mechanism is provided.

  According to still another preferred embodiment of the present invention, the support plate rocking mechanism has a motor disposed below one of the pair of support plates, and the drive shaft of the motor A crank lever that extends parallel to the shaft, and a crank lever that is fixed to the drive shaft, and an arm that is disposed below the one support plate and is pivotally mounted around an axis parallel to the shaft. A guide groove extending in the length direction is formed on the other end side of the arm, and a roller attached to the tip of the crank lever and fitted in the guide groove of the arm so as to roll. A link having one end pivotably connected to an intermediate portion of the arm and the other end pivotally connected to the one support plate, and the crank lever Is allowed to swing within a predetermined angular range by the serial motor, by which the arm is made to swing in the vertical direction along with it, the pair of support plates is made to swing between said first position and said second position.

According to the present invention, the length L in the transport direction of the last margin portion is defined as R between the gap between the upstream transport roller pair and the cutting edge of the fixed cutting blade, and the downstream end of the upstream transport roller pair and the fixed cutting. When the distance between the blade edges is D and D ≦ L ≦ R, when the boundary line between the last margin and the product adjacent to the front reaches the blade edge of the fixed cutting blade when the sheet is conveyed In this case, the sheet is temporarily cut after the boundary line has been conveyed a predetermined distance downstream beyond the cutting edge of the fixed cutting blade.
In this case, the predetermined distance is set to such a size that the rear end of the sheet (the rear end of the last margin portion) can escape from the upstream conveying roller pair region.
As a result, the portion of the last margin portion extending upstream from the cutting edge of the fixed cutting blade falls from the conveying path through the space between the upstream conveying roller pair and the fixed cutting blade.

Thereafter, the downstream conveying roller pair is raised from the fixed position to the raised position, and the sheet is conveyed in the direction opposite to the predetermined distance (the boundary line reaches the cutting edge of the fixed cutting blade). Since the downstream side conveyance roller pair is disposed at the raised position during this conveyance, the sheet can be smoothly conveyed beyond the fixed cutting blade even if the sheet is bent.
Next, the downstream conveying roller pair is lowered from the raised position to the fixed position, and the sheet is cut. At this time, the trailing edge of the paper (the trailing edge of the remaining portion of the last margin) has escaped from the area of the upstream conveying roller pair, and as a result, the remaining portion of the product and the trailing margin portion. And the remaining part falls from the conveyance path through the space between the upstream conveyance roller pair and the fixed cutting blade.

  In this way, the last margin portion can be reliably separated from the product and dropped from the conveyance path and removed.

1 is a schematic cross-sectional view of a sheet processing apparatus including a sheet cutting unit according to an embodiment of the present invention along a sheet conveyance direction. It is a top view of the paper processing apparatus shown in FIG. FIG. 3 is an enlarged plan view of a portion of a sheet cutting unit of the sheet processing apparatus illustrated in FIG. 2. It is a side view showing a schematic configuration of a sheet cutting unit. FIG. 5 is a view similar to FIG. 4 illustrating the operation method of the sheet cutting unit. FIG. 5 is a view similar to FIG. 4 illustrating the operation method of the sheet cutting unit.

Hereinafter, the configuration of the present invention will be described based on preferred embodiments with reference to the accompanying drawings.
FIG. 1 is a schematic cross-sectional view of a paper processing apparatus having a paper cutting unit according to an embodiment of the present invention along the paper transport direction, and FIG. 2 is a plan view of the paper processing apparatus shown in FIG. It is.

Referring to FIGS. 1 and 2, in this embodiment, the sheet processing apparatus includes a supplying feed unit 20 to the sheet S ₀ in one by one conveying path F from the sheet stack T. The sheet S ₀ has a plurality of products P arranged in a predetermined pattern and a margin portion M ₀ surrounding the periphery of the products P.

A transport unit 21 is disposed at the subsequent stage of the paper feed unit 20, and the transport unit 21 transports the paper S ₀ received from the paper feed unit 20 toward the downstream side while correcting skew feeding. The subsequent stage of the transport unit 21, streaks insertion unit 22 to put the streaks along the conveying direction X on the sheet S ₀ is placed. A perforation forming unit 23 for placing perforations along the transport direction X in the sheet S ₀ is disposed at the subsequent stage of the line scoring unit 22.

The subsequent perforation forming unit 23, longitudinal cutting unit 24 for cutting the plurality of strip-like portions sheet S ₀ along the conveying direction X is arranged.
In this case, the plurality of strip-shaped portions are composed of a portion in which the product P and the margin portion M ₁ are arranged in a predetermined pattern (hereinafter referred to as “paper S ₁ ”) and the remaining margin portion. The portion is cut and separated from the sheet S _{1, then} removed from the transport path F and collected by the lower chip discharge unit 25, and only the sheet S ₁ is transported downstream along the transport path F.

The sheet cutting unit 1 according to the present invention is disposed at the subsequent stage of the vertical cutting unit 24.
FIG. 3 is an enlarged plan view of a portion of the paper cutting unit of the paper processing apparatus shown in FIG. 2, and FIG. 4 is a side view showing a schematic configuration of the paper cutting unit.
3 and 4, the sheet cutting unit 1 of the present invention is arranged at intervals in the transport direction X and crosses the transport path F at right angles, and upstream transport rollers that transport the sheet S _1. A fixed cutting blade 4 disposed between the pair 2 and the downstream conveyance roller pair 3 and the upstream and downstream conveyance roller pairs 2 and 3 and extending below the conveyance path F at right angles to the conveyance path F; A movable cutting blade 5 disposed so as to face the upper side of the cutting blade 4, and a cutting blade drive mechanism (illustrated) for cutting the paper S ₁ between the fixed cutting blade 4 and the movable cutting blade 5 by moving the movable cutting blade 5 up and down. Not).

The upstream conveying roller pair 2 is composed of a pair of rollers 2 a and 2 b that are disposed opposite to each other with the conveying path F interposed therebetween. On the other hand, the downstream conveyance roller pair 3 is supported by the lifting mechanism 6 so that the gap g between the downstream conveyance roller pair 3 is aligned with the conveyance path F and the gap g between the downstream conveyance roller pair 3 is the conveyance path. It can be moved up and down between the raised position spaced apart from F upward. In FIG. 4, the downstream conveying roller pair 3 is in a fixed position.
The upstream side conveyance roller pair 2 and the downstream side conveyance roller pair 3 are rotationally driven by a conveyance roller pair drive mechanism (not shown).

  The elevating mechanism 6 is disposed on the upper side or the lower side of the conveyance path F, and is disposed on both sides of the conveyance path F with a shaft 7 extending across the conveyance path F and parallel to the fixed cutting blade 4. And a pair of support plates 8a and 8b that are pivotably mounted around the shaft 7. And the downstream conveyance roller pair 3 is supported between a pair of support plates 8a and 8b.

  In this embodiment, the shaft 7 is provided at the exit of the sheet cutting unit 1 and is disposed oppositely across the conveyance path F. Each of the pair of discharge rollers 16a and 16b extends across the conveyance path F at right angles. It consists of the rotating shaft of the lower discharge roller 16b.

  The elevating mechanism 6 also includes a pair of support plates 8a and 8b, a first position where the downstream conveying roller pair 3 is disposed at a fixed position, and a second position where the downstream conveying roller pair 3 is disposed at an elevated position. The support plate rocking mechanism 9 is rocked with respect to the position.

The support plate rocking mechanism 9 has a motor 10 disposed below one support plate 8a of the pair of support plates 8a and 8b. The drive shaft 10 a of the motor 10 extends parallel to the shaft 7.
The support plate rocking mechanism 9 is also disposed below the crank lever 11 fixed to the drive shaft 10 a of the motor 10 and the one support plate 8 a, and one end 12 a pivots about an axis 12 c parallel to the shaft 7. It has an arm 12 attached to it. A guide groove 13 extending in the length direction is formed on the other end 12 b side of the arm 12.

  The support plate swinging mechanism 9 is further connected to a roller 14 attached to the tip of the crank lever 11 and fitted into the guide groove 13 of the arm 12 so as to be able to roll, and one end 15a is pivotally connected to an intermediate portion of the arm. The other end 15b has a link 15 pivotally connected to the one support plate 8a.

Then, when the crank lever 11 is swung within a certain angle range by the motor 10, the arm 12 swings up and down, and the pair of support plates 8a and 8b swing between the first position and the second position. Along with this, the downstream conveying roller pair 3 takes two positions, a fixed position and a raised position.
In this case, the height from the conveyance path F of the rising position of the downstream conveyance roller pair 3 can be adjusted by changing the angle range of the swing of the crank lever 11.

The operations of the conveying roller pair driving mechanism, the cutting blade driving mechanism, and the lifting mechanism 6 of the paper cutting unit 1 are controlled by the control unit 19 of the paper processing apparatus.
Control unit 19, organic sheet cutting information concerning the sheets S ₀ the touch panel display 19a for receiving an input of a (paper size S _0, the size of the product P, including information such as the position of the product P in the sheet S ₀₎ are doing.

Then, the control unit 19, the sheet cutting information concerning the sheets S ₀ which is input, the size of the sheet cutting information (sheet S ₁ about the paper S _1, the size of the product P, information such as the position of the product P in the sheet S ₁ Calculated).
In addition, the touch panel display 19a has a height (an inclination angle between the first position and the second position of the pair of support plates 8a and 8b) of the ascending position of the downstream-side transport roller pair 3 from the transport path F. It can be input in advance.

Further, an origin sensor 17 is provided for detecting the position of the crank lever 11 when the pair of support plates 8a and 8b are in the first position (that is, when the downstream conveying roller pair 3 is in the fixed position). The unit 19 detects that the downstream side conveying roller pair 3 is in a fixed position based on a detection signal of the origin sensor 17.
Further, a sheet detection sensor 18 that detects the leading edge of the sheet S ₁ is disposed in front of the sheet entrance of the sheet cutting unit 1 on the conveyance path F (before the upstream conveyance roller pair 2).

In the paper cutting unit 1 of the present invention, the upstream conveying roller pair 2 and the downstream at a fixed position at a certain timing based on the paper cutting information of the paper S _{1 using} the detection signal output from the paper detection sensor 18 as a trigger. The sheet S ₁ is intermittently conveyed by the side conveyance roller pair 3, and the boundary line between the product P and the adjacent margin portion M ₁ reaches the cutting edge of the fixed cutting blade 4 sequentially for each conveyance operation.

Then, during the stop of the conveying operation, each time, cutting is performed by the fixed cutting blade 4 and the movable cutter blade 5, the sheet S ₁ is separated into the product P and the margin portion M _1, the product P is downstream transport roller The pair 3 and the pair of discharge rollers 16a and 16b are fed to the subsequent stacking unit 26. On the other hand, the separated margin portion M ₁ is dropped and removed from the conveyance path F through the space between the fixed cutting blade 4 and the downstream conveyance roller pair 3, and collected by the chip discharging unit 25.

Thus, the sheet S ₁ is, by the upstream conveying roller pair 2 and the downstream transport roller pair 3 is conveyed intermittently, is cut by the fixed cutting blade 4 and the movable cutter blade 5 during conveyance stop, sequentially from its leading end side, It is separated from the product P and the margin portion M _1.

When the last margin portion M ₁ of the sheet S ₁ is separated from the product P adjacent to the front thereof, the length L in the conveyance direction of the last margin portion M ₁ is the gap G between the upstream conveyance roller pair 2. The distance between the cutting edges of the fixed cutting blade 4 is R, and the distance between the downstream end of the upstream conveying roller pair 2 and the cutting edge of the fixed cutting blade 4 is D.
D ≦ L ≦ R
If it is, when the boundary line between the end of the margin portion M ₁ and the product P has reached the edge of the fixed cutting blade 4, the sheet S ₁ is without being suddenly cut, by further predetermined distance downstream It is conveyed (see FIG. 5A).
In this case, the predetermined distance is set to such a size that the trailing edge of the sheet S ₁ (the trailing edge of the last margin portion M ₁ ) can escape from the area of the upstream conveying roller pair 2.

At this position, raised after the movable cutting blade 5 descends, whereby the sheet S ₁ is being cut, the portion extending upstream from the cutting edge of the last margin portion M ₁ of the stationary cutting blade 4, the upstream It falls from the conveyance path F through the space between the side conveyance roller pair 2 and the fixed cutting blade 4 and is collected by the chip discharging unit 25 (see FIG. 5B).

Next, the crank lever 11 is swung counterclockwise by a predetermined angle from the origin position (detection position of the origin sensor), whereby the downstream side conveyance roller pair 3 is raised from the fixed position to the raised position (see FIG. 5C).
Then, it is conveyed in the opposite direction the sheet S ₁ is by the predetermined distance by the downstream conveying roller pair 3, the boundary line reaches the edge of the fixed cutting blade 4 (see Fig. 5D). During the transport, since the downstream transport roller pair 3 take raised position, even when the sheet S ₁ is the deflected, is smoothly conveyed past the stationary cutting blade 4.

Thereafter, the crank lever 11 swings clockwise to return to the origin position, and thereby the downstream side conveyance roller pair 3 is lowered from the raised position to the fixed position (see FIG. 6A). At this time, the rear end of the sheet S ₁ (the rear end of the remaining portion of the last margin portion) has escaped from the area of the upstream conveying roller pair 2.
At this position, the movable cutting blade 5 is lowered and then raised, whereby the product P and the remaining margin portion are separated, and the remaining portion is fixed to the upstream conveying roller pair 2. It falls from the conveyance path F through the space between the cutting blades 4 and is collected by the chip discharge unit 25, and the product P is sent downstream on the conveyance path F by the downstream conveyance roller pair 3 (FIGS. 6B and C). reference).

The transport direction length L of the last margin portion M ₁ is smaller than the distance D between the edge of the upstream conveying roller pair 2 on the downstream end and the fixed cutting blade 4, the margin portion of the last M _When the boundary line between ₁ and the product P reaches the cutting edge of the fixed cutting blade 4, the sheet S ₁ is cut.

Thus, according to the sheet cutting unit 1 of the present invention, a margin portion M ₁ of the last reliably separated from the product P, is dropped from the conveying path F, it can be removed.

DESCRIPTION OF SYMBOLS 1 Paper cutting unit 2 Upstream conveyance roller pair 2a, 2b Roller 3 Downstream conveyance roller pair 4 Fixed cutting blade 5 Movable cutting blade 6 Lifting mechanism 7 Shaft 8a, 8b Support plate 9 Support plate swing mechanism 10 Motor 10a Drive shaft 11 Crank Lever 12 Arm 12a One end 12b Other end 12c Shaft 13 Guide groove 14 Roller 15 Link 15a One end 15b Other end 16a, 16b Discharge roller 17 Origin sensor 18 Paper detection sensor 19 Control unit 19a Touch panel display 20 Paper feed unit 21 Transport unit 22 Streaking Unit 23 Perforation forming unit 24 Longitudinal cutting unit 25 Chip removal unit 26 Stacking unit D Distance between the downstream end of the upstream conveying roller pair and the cutting edge of the fixed cutting blade F Conveying path G Gap between the upstream conveying roller pair Downstream Between side transport roller pair L Finally conveyance direction length of the tail margin portion M _0, M ₁ marginal portions P product R upstream transport roller pair gap and the distance S ₀ sheet S ₁ Paper T sheet stack X conveying direction between the cutting edge of the fixed cutting blade

Claims (4)

The product and the paper having the margin part arranged in a predetermined pattern are intermittently conveyed, and the paper is separated into the product and the margin part by cutting at right angles to the conveyance direction while the conveyance is stopped,
An upstream conveyance roller pair and a downstream conveyance roller pair that are spaced apart from each other in the conveyance direction and perpendicularly cross the sheet conveyance path, and convey the sheet;
A transport roller pair drive mechanism that rotationally drives the upstream transport roller pair and the downstream transport roller pair;
A fixed cutting blade disposed between the upstream and downstream conveyance roller pairs and extending across the conveyance path at a right angle below the conveyance path;
A movable cutting blade disposed facing the upper side of the fixed cutting blade;
A cutting blade drive mechanism that raises and lowers the movable cutting blade to cut a sheet between the fixed cutting blade and the movable cutting blade;
In a paper cutting unit comprising a control unit that controls operations of the transport roller pair drive mechanism and the cutting blade drive mechanism based on pre-input paper cutting information,
A fixed position that supports the downstream conveying roller pair and that a gap between the downstream conveying roller pair aligns with the conveying path, and an ascending position that a gap between the downstream conveying roller pair is spaced upward from the conveying path. An elevating mechanism that elevates between, and the operation of the elevating mechanism is controlled by the control unit,
The length L in the transport direction of the last margin part is defined as R between the gap between the upstream transport roller pair and the cutting edge of the fixed cutting blade, and the downstream end of the upstream transport roller pair and the fixed cutting blade Let D be the distance between the cutting edges.
D ≦ L ≦ R
If
(1) When the boundary line between the last margin part and the product adjacent to the front reaches the cutting edge of the fixed cutting blade, the sheet is not cut and is further conveyed by a predetermined distance downstream. Cut,
(2) The downstream conveying roller pair rises from the fixed position to the raised position,
(3) The paper is conveyed in the opposite direction by the predetermined distance,
(4) The downstream conveying roller pair is lowered from the raised position to the fixed position,
(5) A sheet cutting unit, wherein the sheet is cut and the product adjacent to the front is separated from the remaining margin portion at the end.   2. The sheet cutting unit according to claim 1, wherein a height of the raised position of the pair of downstream side conveyance rollers from the conveyance path is adjustable. The lifting mechanism is
A shaft disposed above or below the transport path, extending across the transport path and parallel to the fixed cutting blade;
A pair of support plates disposed on both sides of the transport path and pivotably attached to the shaft around the shaft;
The pair of downstream transport rollers is supported between the pair of support plates, and
The pair of support plates are oscillated between a first position where the downstream conveying roller pair is disposed at the fixed position and a second position where the downstream conveying roller pair is disposed at the raised position. The sheet cutting unit according to claim 1, further comprising a support plate swinging mechanism. The support plate rocking mechanism is
A motor disposed below one of the pair of support plates; a drive shaft of the motor extends parallel to the shaft; and
A crank lever fixed to the drive shaft;
The arm is disposed below the one support plate and has one end pivotably mounted around an axis parallel to the shaft. A guide groove extending in the length direction is provided on the other end of the arm. Formed, and
A roller attached to a tip of the crank lever and fitted in a rollable manner in the guide groove of the arm;
A link having one end pivotably connected to an intermediate portion of the arm and the other end pivotally connected to the one support plate;
The crank lever is swung within a certain angle range by the motor, and the arm is swung in the vertical direction accordingly, whereby the pair of support plates are moved between the first position and the second position. 4. The sheet cutting unit according to claim 3, wherein the sheet cutting unit is moved.

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