CN102811932A

CN102811932A - Clamping device and printer

Info

Publication number: CN102811932A
Application number: CN2011800036258A
Authority: CN
Inventors: 栢沼康修
Original assignee: Fujifilm Corp
Current assignee: Fujifilm Corp
Priority date: 2011-03-23
Filing date: 2011-11-04
Publication date: 2012-12-05
Also published as: JPWO2012127731A1; US20120280447A1; WO2012127731A1

Abstract

A sheet 3 is caught between a clamper 15 and a platen drum 10 at its sheet front end portion. The clamper 15 is provided with a pressing member 32 with elasticity, and the pressing member 32 has two projections 32b. During conveyance, a pressing surface 32a tightly comes into contact with the front end portion of the sheet 3, while each projection 32b is elastically deformed and compressed. When correcting skew of the sheet 3, the clamper 15 is turned, while only the projections 32b press the front end portion of the sheet 3.

Description

Holding device and chopping machine

Technical field

The present invention relates to be used for the crooked holding device of cylinder correction sheet material, and the chopping machine that is used for print image on the cylinder sheet material.

Background technology

The cylinder sheet material that utilization has a large amount of lens of the roughly semicylindrical shape that is arranged side by side is known with the cylinder 3D of visual inspection 3D rendering photography.In cylinder 3D photography; For example; The R visual point image that to from right, left two viewpoints, catch and each in the L visual point image are divided into fillet (line); And the stripe pattern of the stripe pattern of R visual point image and L visual point image alternately is arranged on the back side of cylinder sheet material, makes the stripe pattern of two adjacency be positioned at the below of single lens.Because right eye and left eye are watched R visual point image and the L visual point image with parallax through each lens respectively, therefore realized 3D rendering.Be known that equally and catch N (N be 3 or more than) visual point image and it is divided into fillet, and the back that N stripe pattern is arranged on single lens is to strengthen stereoeffect further.

There is two types cylinder 3D photography, comprises, and stripe pattern is printed to the type at the back side of cylinder sheet material the stacked type of printing above that on the sheet material that stripe pattern is arranged of cylinder sheet material.Using chopping machine stripe pattern to be printed under the situation at the back side of cylinder sheet material, transmit the cylinder sheet material off and on along sub scanning direction.Just after each indexing transfer, start printhead, so that will print to the back side of cylinder sheet material seriatim along the stripe pattern that main scanning direction extends.Thereby at least two kinds of visual point images that will have parallax are printed on the back side of cylinder sheet material (referring to patent documentation 1 and patent documentation 2).

Known stripe pattern is printed on the sheet material bonds to the chopping machine (referring to patent documentation 3) on the cylinder sheet material with sheet material then.This chopping machine need correctly be located the cylinder sheet material with respect to stripe pattern and sheet material is carried out bonding mechanism.For this reason, this chopping machine that striped is directly printed to cylindrical lens back side type has advantage on size and cost.

Incidentally, when a plurality of visual point images were printed to the back side of cylinder sheet material, the cylinder sheet material was transmitted under the bevelled situation sometimes.This inclination is called as crooked.In this case and since stripe pattern be lens vertically with state that main scanning direction does not overlap under quilt printed, so print quality descends significantly.In order to prevent to have designed various technology routinely because of the reduction of the crooked print quality that causes of cylinder sheet material.

Patent documentation 1 has been described a kind of chopping machine, wherein is arranged on the position that near the optical pickocff of printhead detects lens, and the print position of position-based testing result adjustment stripe pattern.Even the cylinder sheet material is crooked, also can be according to the crooked print position of adjusting stripe pattern.

Patent documentation 2 has been described the crooked chopping machine of cylinder correction sheet material in advance.In this chopping machine, detect lens vertically with respect to the angle of inclination of main scanning direction.Make along the conveying capacity of sub scanning direction according to testing result different on the right side with the left side, thereby make the cylinder sheet material around with the rotational of its transmission Surface Vertical, with correcting skew.

On the other hand, two kinds of transmission types, straight line transmission type and the platen drum type of known printer.When for example printing coloured image, in last type, on linear transport path, transmit printed sheets, and during back and forth transmitting, utilizing color sequences method printing color image.In back one type, make the platen drum rotation that is wound with printed sheets on it, and at printing color image (for example referring to patent documentation 4) in the hand of rotation transmission printed sheets of platen drum.In last type, because in the forward and backward space of retreating that needs printed sheets of printhead, so the size of chopping machine becomes big easily.On the other hand, in back one type, need not retreat the space, and can arrange printhead and sheet material output mechanism around the platen drum, therefore such chopping machine has the advantage that reduces size.

Patent documentation

Patent documentation 1: the open No.2007-76084 of Japanese patent application

Patent documentation 2: the open No.8-137034 of Japanese patent application

Patent documentation 3: the open No.7-219084 of Japanese patent application

Patent documentation 4: the open No.61-128677 of Japanese patent application

Summary of the invention

Technical matters to be solved by this invention

Incidentally, of patent documentation 1 under the situation of the print position of adjusting stripe pattern, if there be the crooked bigger of cylinder sheet material, the distortion that then is printed on the visual point image on the cylinder sheet material becomes problem big and that cause print quality to reduce.Through adopting the platen drum type, the chopping machine of type slug print image can obtain the advantage aspect the size on the cylinder sheet material.Yet different with patent documentation 2 is owing to can not make conveying capacity different with the left side on the right side, so can't the cylinder correction sheet material crooked.In addition, if be that order makes the platen drum around the rotational vertical with its rotation axis with cylinder correction sheet material crooked, then printhead and the platen distance between bulging becomes inhomogeneous.This has caused decrease in image quality.

Main purpose of the present invention provide a kind of can be under the situation that does not produce image fault the crooked holding device and the chopping machine of cylinder correction sheet material rightly.Another object of the present invention provides the chopping machine that a kind of structure of signing an undertaking is simple and size is little.

The means of technical solution problem

A kind of according to holding device of the present invention, comprise clamper, clamper travel mechanism, clamper rotating mechanism and controller.Clamper has is with elastomeric pressing component, and clamper is clamped in the part of cylinder sheet material between this pressing component and the support component.At least a portion of the said cylinder sheet material of said support member supports.Said clamper travel mechanism moves said clamper between retreating position, first clip position and second clip position.At said retreating position, said pressing component is away from said support component.At said first clip position, said pressing component is pushed the said part of said cylinder sheet material to prevent between said cylinder sheet material and the said pressing component and the slip between said cylinder sheet material and the said support component.At said second clip position, said pressing component is pushed the said part of said cylinder sheet material, to prevent the slip between said cylinder sheet material and the said pressing component and to allow the slip between said cylinder sheet material and the said support component.Said clamper rotating mechanism makes said clamper rotate around the rotation axis vertical with said cylinder sheet material.For the said cylinder sheet material that is held is rotated, said controller is controlled said clamper travel mechanism and said clamper rotating mechanism, is set at the said clamper of said second clip position with rotation.For the cylinder sheet material is fixed on the support component, said controller is controlled said clamper travel mechanism, so that said clamper is set in said first clip position.

Said pressing component preferably has a plurality of juts, and said jut is formed on the press surface of facing mutually with said support component.At said first clip position, said press surface compresses each jut on being pressed against the said part of said cylinder sheet material, thereby the said part of said cylinder sheet material is clamped between said press surface and the said support component.At said second clip position; Each jut is pressed against on the said part of said cylinder sheet material with littler amount of compression when being in said first clip position, so that the said part of said cylinder sheet material is clamped between each jut and the said support component.

Said jut is preferably dimensioned to be corresponding with the distance from said rotation axis to said jut.At said second clip position, the zone that contacts with said cylinder sheet material of said jut is preferably according to distance from said rotation axis to said jut and different.

Preferably; Beyond the surf zone of said support component; At least add the non-formation of can being assigned to of each jut zone with the zone that each jut is faced mutually by the zone that said clamper rotating mechanism moves; And all the other zones are assigned to and form the zone, and the rubber-like elastic layer be formed on said the formations zone so that the friction coefficient in the said non-formation zone less than the friction coefficient in the said formation zone.

The said part of facing mutually with said press surface that form that the zone comprises said support component, thus when said clamper was in said first clip position, the said part of said cylinder sheet material was clamped between said press surface and the said elastic layer.

A kind of according to chopping machine of the present invention; It transmits the cylinder sheet material along sub scanning direction; Be formed with a plurality of lens in the front of said cylinder sheet material; And said chopping machine is in turn printed a plurality of stripe patterns parallel with main scanning direction at the back side of said cylinder sheet material, and said main scanning direction is perpendicular to said sub scanning direction, and said chopping machine comprises: platen, clamper, clamper travel mechanism, crooked test section, clamper rotating mechanism and controller.Said platen supports said cylinder sheet material and moves said cylinder sheet material along said sub scanning direction.Said clamper has pressing component, and said pressing component has elasticity, and said clamper is pressed on the said platen sheet material end of said cylinder sheet material so that said sheet material end clips is held between said clamper self and the said platen.Said clamper travel mechanism moves said clamper between retreating position, first clip position and second clip position.At said retreating position, said pressing component is away from said platen.At said first clip position, said pressing component is pushed the sheet material end of said cylinder sheet material to prevent between said cylinder sheet material and the said pressing component and the slip between said cylinder sheet material and the said platen.At second clip position, said pressing component is pushed the said part of said cylinder sheet material, to prevent the slip between said cylinder sheet material and the said pressing component and to allow the slip between said cylinder sheet material and the said support component.Said crooked test section is used to detect the crooked of said cylinder sheet material.Said clamper rotating mechanism makes said clamper rotate around the rotation axis vertical with said cylinder sheet material.In order to proofread and correct said cylinder sheet material crooked with respect to said main scanning direction; Said controller is controlled said clamper travel mechanism and said clamper rotating mechanism based on the testing result of said crooked test section, and the said clamper that is set at said second clip position is rotated.In order to transmit said cylinder sheet material along said sub scanning direction, said controller is controlled said clamper travel mechanism, and when said platen moves along said sub scanning direction, said clamper is set in said first clip position.

Said pressing component preferably has a plurality of juts, and said jut is formed on the press surface of facing mutually with said platen.At said first clip position, said press surface compresses each jut on being pressed against said sheet material end, so that said sheet material end clips is held between said press surface and the said platen.At said second clip position, each jut is pressed against on the said sheet material end with littler amount of compression when being in said first clip position, so that the said part of said sheet material is clamped between each jut and the said platen.

Beyond the surf zone of said platen; What preferably will be at least add the above jut with zone that each jut is faced mutually can be non-formations zone by the region allocation that said clamper rotating mechanism moves, and preferably that all the other region allocation are regional for forming.Preferably, the rubber-like elastic layer is formed on the said formation zone, and the friction coefficient in the said non-formation zone is less than the friction coefficient in the said formation zone.

The said part of facing mutually with said press surface that form that the zone preferably includes said platen, thus when said clamper was in said first clip position, said sheet material end was clamped between said press surface and the said elastic layer.

Said platen is preferably the rotatable platen drum that is twining said cylinder sheet material on it.

The sheet material leading section of cylinder sheet material preferably is clamped between said clamper and the said platen.

The technique effect of invention

According to the present invention, can use the crooked of simple correct-by-construction cylinder sheet material.In addition, helping simplified structure to carry out printing under can not taking place such as the situation of deterioration in image quality such as image fault with reducing size.

Description of drawings

Fig. 1 is the instruction diagram that the summary of having used chopping machine of the present invention is shown.

Fig. 2 is the transparent view of cylinder sheet material.

Fig. 3 illustrates the instruction diagram of peeling off the state of cylinder sheet material through separation claw.

Fig. 4 is the transparent view that the bottom side of clamper is shown;

Fig. 5 A is the instruction diagram that the state of the clamper that is in retreating position is shown.

Fig. 5 B is the instruction diagram that the state of the clamper that is in first clip position is shown.

Fig. 5 C is the instruction diagram that the state of the clamper that is in second clip position is shown.

Fig. 6 is the instruction diagram that the zone with elastic layer of platen drum is shown and does not have the zone of elastic layer.

Fig. 7 is the instruction diagram that the press surface and the jut of clamper is shown and does not have the position relation between the zone of elastic layer.

Fig. 8 illustrates the instruction diagram of lens sensor with respect to the layout of cylinder sheet material.

Fig. 9 is the transparent view of grip unit.

Figure 10 is the transparent view that rear end anchor clamps and switching mechanism thereof are shown.

Figure 11 is the diagram of circuit that illustrates from skew corrected to the process of printing.

Figure 12 is the non-instruction diagram that forms the embodiment in zone that the moving area that wherein only will add jut with the zone that jut is faced is mutually distributed to elastic layer.

Figure 13 is the instruction diagram of another embodiment of changing according to the distance between the rotation axis of itself and clamper of the size of wherein jut.

The specific embodiment

In Fig. 1, chopping machine 2 is printed the anaglyph (set of visual point image) that is used to watch 3D rendering through the method for distillation at the back side of cylinder sheet material (abbreviating sheet material hereinafter as) 3.This chopping machine 2 converts two visual point images into six visual point images, and six visual point images are divided into many stripe patterns, and on sheet material 3 the type slug print image.

As well-known, as shown in Figure 2, in the face side of sheet material 3 many lens 4 that have shape to be roughly cylindrical (column) are set, and the back side of sheet material 3 is put down.Each lens 4 extends along main scanning direction.In fact the back side of sheet material 3 be divided into image-region 5 according to separate lenses 4, and single image zone 5 is corresponding with single lens 4.According to the quantity of visual point image, divide each image-region 5 along the orientation of lens 4.

In the present embodiment, image-region 5 is divided into the first zonule 5a to the, six zonule 5f.The stripe pattern of six visual point images being cut apart the slivering gained is printed on the first zonule 5a to the six to 5f.5f is corresponding with first visual point image to the, six visual point images with man-to-man mode to the zonule for zonule 5a.In the present embodiment, each zonule 5a to 5f has the width (along the length of sub scanning direction) of about 40 μ m, and single lines have the width greater than 20 μ m.Thereby for example, two adjacent lines of first visual point image are printed on the first zonule 5a as single stripe pattern abreast.

As shown in Figure 1, chopping machine 2 is provided with sheet feed cassette 9.Sheet feed cassette 9 accommodates the sheet material 3 that piles up.When printing, the paper-feeding mechanism (not shown) is supplied single page sheet materials 3 from sheet feed cassette 9 to feed path 6.Sheet material 3 transmits through feed path 6 with the orientation (sub scanning direction) of lens 4 prone modes along lens 4.Note that also to may instead be sheet material 3 is manually inserted feed path 6.

In feed path 6, from upstream side (side of sheet feed cassette 9) be provided with in order paper feed roller to 7 with transducing part 8, and platen drum 10 is arranged on the downstream of feed path 6.Feed path 6 extends along the tangential direction of the periphery of platen drum 10, thereby will be supplied to the outer surface of platen drum 10 from the sheet material 3 of supplying with path 6.

Paper feed roller is made up of drive roll 7a and hold-down roller 7b 7; Drive roll 7a is through electrical motor 12 rotations; Hold-down roller 7b can move between following two positions: sheet material 3 is engaged in the occlusal position between hold-down roller 7b and the drive roll 7a, and away from the releasing position of sheet material 3.Paper feed roller is sent to platen drum 10 to 7 interlock sheet materials and the rotation through drive roll 7a with sheet material 3.

Platen drum 10 is supported by the axle 10a parallel with main scanning direction with rotatable mode, and platen drum 10 can be through electrical motor 14 rotations.The hand of rotation of electrical motor 14 is changeable, thereby platen drum 10 is along rotating with one of the positive veer shown in the arrow A and reverse directions in contrast.

When printing, sheet material 3 is wrapped on the outer surface 10b of platen drum 10.Platen drum 10 rotates along sub scanning direction through himself and transmits sheet material 3.Sheet material 3 is wrapped on the platen drum 10 with such orientation: lens 4 are corresponding with circumferential (sub scanning direction) of platen drum 10 towards the orientation of platen drum side and lens 4.

Clamper 15, clamper travel mechanism 16 and clamper rotating mechanism 17 constitute grip unit.Clamper 15 is clamped in the leading section (being called the sheet material leading section hereinafter) of sheet material 3 between clamper 15 self and the outer surface 10b.Clamper 15 forms as one with platen drum 10, and rotates to sub scanning direction integratedly with platen drum 10.In the present embodiment, platen drum 10 is as support component.Platen drum 10 constitutes the connecting gear that transmits sheet material 3 along sub scanning direction with electrical motor 14.

Clamper travel mechanism 16 moves radially clamper 15 along platen drum 10.Through clamper travel mechanism 16, clamper 15 is moving between following two positions: the sheet material leading section is clamped in the clip position between clamper 15 self and the outer surface 10b, and the retreating position of removing this clamping.Clip position comprises: first clip position is fit to clamping sheet material leading section tightly; And second clip position, be fit to than first clip position loose ground clamping sheet material leading section more.

Clamper rotating mechanism 17 makes clamper 15 rotate around the rotation axis with the Surface Vertical of sheet material 3.Clamper 15 rotates in clamping sheet material 3, thereby it is arbitrarily angled to proofread and correct the crooked of sheet material 3 that sheet material 3 is rotated.In the present embodiment, platen drum 10 radially with consistent perpendicular to the direction that is wrapped in the sheet material 3 on the platen drum 10.

Periphery at platen drum 10 is provided with hot 18 and separation claw 19.Hot 18 bottom has two heater element array 18a, and each array 18a is made up of a plurality of heater elements along the main scanning direction straight-though arrangement.Provide two heater element array 18a that are adjacent to each other to make it possible to print at one time single stripe pattern (two bar line).Then, transmit sheet material 3 six times along sub scanning direction with the zonule width, this makes it possible to print single image-region 5.Each heater element array 18a is longer than the width (along the length of main scanning direction) of the print area of sheet material 3 slightly along the length of main scanning direction.

Heat 18 is moving between following two positions: cover under the state on the back side of the sheet material 3 on the platen drum 10 pressing position that printed films 21 is pressed into the back side of sheet material 3 in printed films 21, and the retreating position of upwards keeping out of the way from the pushing position.Printed films 21 comprises that image accepts film, yellow ink film, magenta ink film, bluish-green ink film and backing tunic.The size of every tunic is identical with the general size of sheet material 3.These film one decks connect one deck ground and engage, to constitute the film group of single sheet material.The transmission of printed films 21 and sheet material 3 synchronously supplies to another reel and is wrapped on this reel from a reel.

Image is accepted film and is formed image receiving layer (basic unit) at the back side of sheet material 3, uses the color ink from the China ink layer that image receiving layer is dyeed.During by heat 18 heating, transparent image receiving layer is transferred to the back side of sheet material 3 when image is accepted the back side that film covering sheet material 3.

Yellow, magenta and bluish-green ink film are known heat sublimation ink films.When every layer of ink film covering on the image receiving layer that is formed at sheet material 3 back sides during by heat 18 heating, China ink distillation and be transferred to image receiving layer.The adhesion amount of film increases according to the cal val of heat 18 or reduces, and this helps appearing of half tint.Note that through using the black ink film, can carry out the printing of using four kinds of colors and implementing.

When the backing tunic was covering under the state on the image (being printed on the sheet material 3) by heat 18 heating, the backing tunic was transferred to image with white back sheet.This back sheet reflected light, and can watch 3D rendering bright and color clear.

Head driver 22 is together with heat 18 a formation printing portion 23.Head driver 22 drives each heater element of hot 18.When forming image receiving layer and back sheet, head driver 22 drives hot 18, makes each heater element produce identical cal val.This cal val is set to transferred image receiving layer and the necessary amount of back sheet.When using the ink film print image, head driver 22 is printed full-color image through three colour field sequentials.In this case, based on each heater element of view data heating of six visual point images, to obtain and the cooresponding black concentration of view data.

The view data of treating print image is input to controller 24.The data of being imported for example are the visual point images that comes from two viewpoints.Controller 24 will convert the view data from six viewpoints from the view data of two viewpoints into.The view data from six viewpoints after the conversion is sent to head driver 22.

The sheet material 3 that separation claw 19 will have been printed is peeled off from platen drum 10, and sheet material 3 is guided to cutter unit 25.Separation claw 19 is arranged on the central authorities on the Width of sheet material 3, and separation claw 19 can be swung between following two positions: the top of separation claw 19 is away from the retreating position (as shown in Figure 1) of outer surface 10b; And the top of separation claw 19 contact with outer surface 10b peel off position (as shown in Figure 3).Separation claw 19 is being set under the state of peeling off the position, when platen drum 10 when reverse directions is rotated, separation claw 19 usefulness its rear end scoop up sheet material 3 and sheet material 3 are guided in the cutter unit 25.The margin of cutter unit 25 cutting sheet materials 3, promptly above not print image by the sheet material leading section of clamper 15 clampings with by the rearward end (being called the sheet material rearward end hereinafter) of the sheet material 3 of rear end anchor clamps 27 clampings.Then, cutter unit 25 is discharged the sheet material that is cut 3 from chopping machine.

Please note; The position of separation claw 19 is adjusted to: when the contrarotation through platen drum 10 makes rearward end and platen drum 10 that separation claw 19 scoops up sheet material 3 when reverse directions continues a small amount of rotation; As will be described hereinafter, the position of rotation of platen drum 10 is set to the position of readiness that is used to start clamper 15.Thereby after the clamping of removing sheet material 3, the connecting gear that is contained in the cutter unit 25 can transmit sheet material 3.

Periphery at platen drum 10 is provided with a plurality of guide reels 26.When sheet material 3 is wrapped in 10 last times of platen drum, thereby these guide reels 26 extruding platen drums 10 are clamped in sheet material 3 between guide reel 26 and the platen drum 10.Therefore, before rear end anchor clamps 27 clamping sheet material rearward end, guide reel 26 prevents that sheet material 3 from floating from outer surface 10b because of sheet material 3 self rigidity.Note that guide reel 26 for example can be along the moving radially of platen drum 10, thereby guide reel 26 can not disturb mobile clamper 15.

By switching mechanism 28 operation rear end anchor clamps 27, and rear end anchor clamps 27 are at the clip position of clamping sheet material 3 with remove between the retreating position of clamping and move.Rear end anchor clamps 27 are clamped in the sheet material rearward end between rear end anchor clamps 27 self and the platen drum 10, to prevent that sheet material 3 floats from outer surface 10b because of sheet material 3 self rigidity during printing.These rear end anchor clamps 27 rotate with platen drum 10 integratedly.

Except clamper travel mechanism 16, clamper rotating mechanism 17, head driver 22 etc., controller 24 is also controlled each part of the chopping machine 2 that comprises electrical motor 12 and 14, separation claw 19, switching mechanism 28 etc.

Fig. 4 illustrates and is in the clamper 15 of bottom surface (towards a side of platen drum) towards last attitude.This clamper 15 is made up of substrate with rigidity 31 and the pressing component 32 that is arranged on integratedly on the lower surface of substrate 31.Substrate 31 is rectangular plates, and it has and sheet material 3 length about equally along main scanning direction, and has suitable width along sub scanning direction.Pressing component 32 has the size identical with substrate 31.In pressing component 32, a pair of jut 32b is formed on the flat press surface 32a.Pressing component 32 is processed by the elastomeric material with great friction coefficient.This material for example comprises rubber.Jut 32b is by forming with pressing component 32 identical materials, but jut 32b also can be by forming with pressing component 32 material different, as long as the material of jut 32b has elasticity and great friction coefficient.

The projection amount of jut 32b (highly) is approximately 0.1 to 0.3mm.This is set to the width that is narrower than sheet material 3 to the distance between the jut 32b, and two jut 32b contact with sheet material 3 simultaneously.For the ease of describing, in Fig. 4 and other accompanying drawings, each jut 32b is exaggerated.

Shown in Fig. 5 A, at retreating position, clamper 15 forms suitable gap between jut 32b and platen drum 10.This makes the sheet material of supplying with from feed path 63 can get in the space between jut 32b and the outer surface 10b, and can sheet material 3 be extracted out in the space between jut 32b and the outer surface 10b.

Shown in Fig. 5 B, at first clip position, clamper 15 is pushed the sheet material leading section with its whole press surface 32b.At this first clip position, each jut 32b is pressed against on the sheet material leading section, and elastic deformation takes place and is compressed.As stated, through with whole press surface 32a clamping sheet material leading section, the sheet material leading section can not gone up slippage with outer surface 10b from pressing component 32 by clamping tightly.When transmitting sheet material 3, clamper 15 is set at first clip position.

Shown in Fig. 5 C, at second clip position, to compare with first clip position, clamper 15 is shifted to the retreating position side a little.Therefore, press surface 32a is away from sheet material 3, and each jut 32b is compressed with the amount of compression littler than the amount of compression at the first clip position place.Only push and clamping sheet material leading section by jut 32b.This clip position allows the sheet material leading section to go up slippage from outer surface 10b, stops the sheet material leading section to go up slippage from jut 32b simultaneously.When proofreading and correct sheet material 3 crooked, clamper 15 is set at second clip position.When clamper 15 was set at second clip position and rotates, sheet material 3 was followed the rotation of clamper 15 and is rotated.

As shown in Figure 6, on the surface of the bulging main body 34 that for example is made of metal, be formed with rubber-like elastic layer 35.The purpose that this elastic layer 35 is set is to prevent because of causing scratch on the slip sheet material 3 by elastic layer 35 closed contact with sheet material 3, improves contacting of heat 18 and sheet material 3, or the like.This elastic layer 35 is for example formed by the rubber sprayed coating.

On the whole circumference of platen drum 10, form elastic layer 35 as indicated above, can reduce the slip between sheet material leading section and the elastic layer 35.Thereby, rotating even be set at the clamper 15 of second clip position, sheet material 3 also can't accurately rotate along with the rotation of clamper 15.

Therefore, on platen drum 10, the part of outer surface 10b is assigned as the non-formation zone 36 that does not wherein form elastic layer 35, and the remainder of outer surface 10b is assigned as the formation zone 37 that wherein is formed with elastic layer 35.Non-formation zone 36 is arranged in towards clamper 15 parts.Expose from non-formation zone 36 on the surface of drum main body 34, and the friction coefficient that wherein rouses the surface of main body 34 is lower than the friction coefficient on the surface of elastic layer 35.

As shown in Figure 7, non-formation zone 36 is formed on the whole width of platen drum 10 along main scanning direction, but not forms zone 36 is narrower than press surface 32a on sub scanning direction width.The part towards press surface 32a of outer surface 10b constitutes a part that forms zone 37.

Owing to be formed as described above elastic layer 35, thereby when clamper 15 is set at second clip position, no matter clamper 15 is in any turned position, jut 32b all in non-formation regional 36 with the interior sheet material leading section of pushing.Thereby the part of being pushed by jut 32b of sheet material leading section and the metallic contact with low-friction coefficient of platen drum 10 make that the slip between sheet material leading section and the outer surface 10b is not interrupted.On the other hand, when clamper 15 was in first clip position, press surface 32a tightly went up the sheet material leading section to keep the maintenance to sheet material by being pressed in the elastic layer 35 (forming zone 37) with great friction coefficient.This has prevented that sheet material 3 slides during the transmission of printing etc.

Can suitably confirm to detect the processes such as crooked, swing holder 15 of sheet material.In the present embodiment, this process is made up of three steps, comprising: to the judgement of direction of tilt, adjustment and meticulous adjustment roughly., the rotation through platen drum 10 detects the crooked of sheet material 3 when transmitting sheet material 3.When the transmission of sheet material 3 stops, carrying out skew corrected.In Fig. 1, transducing part 8 constitutes the crooked crooked test section of detecting sheet material 3 together with controller 24.Controller 24 is judged the direction of tilt of sheet material 3 and the tilt angle theta of sheet material 3 based on the detection signal from transducing part 8, and through control clamper rotating mechanism 17 clamper 15 is rotated so that correcting skew.Direction of tilt refers to vertical direction of tilt with respect to main scanning direction of lens 4.Tilt angle theta refers to vertical angle of inclination with respect to main scanning direction of lens 4.

As shown in Figure 8, transducing part 8 comprises along first lens sensor, 41 to the 3rd lens sensors 43 of main scanning direction alignment.Lens sensor 41 to 43 is set to have unequal spacing each other (S1 ≠ S2, S2 ≠ S3, S1 ≠ S3).Each lens sensor 41 to 43 is by the LED that is arranged on sheet material 3 belows (light-emitting diode) and be arranged on constituting with the opposed photosensor of LED of sheet material 3 tops.Photosensor receives the detection light of having launched and passed sheet material 3 from LED, and according to detecting the light intensity output detection signal.

For example; From lens sensor 41 to 43 towards the border between the lens 4 to lens sensor 41 to 43 during the summit of lens 4; Detection signal from each lens sensor 41 to 43 little by little strengthens, and when lens sensor 41 to 43 during towards this summit, detection signal reaches peak value.After this, detection signal little by little weakens, and when the border of lens sensor 41 to 43 between lens 4, detection signal becomes once more little by little and strengthens.Note that in the present embodiment transducing part 8 also detects the leading section of sheet material 3 during supplying with, the spacing of measurement of Lens 4, or the like.

In judging the process of direction of tilt, measure from the detection signal of first lens sensor 41 during sheet material 3 transmits, reach its peak value the time be carved into the transmission length L A of the sheet material 3 that moment that the detection signal of second lens sensor 42 after this reaches its peak value transmits.In other words, measure from first lens sensor 41 detect any lens 4 the summit the time be carved into the transmission length of the sheet material 3 that moment that second lens sensor 42 after this detects the summit of lens 4 transmits.Note that can be for example to obtain to transmit length, measure transmission length but also can use coder together with 10 rotations of platen drum to wait based on the quantity that is provided to as the drive pulse of the electrical motor 14 of the drive source of platen drum 10.

Measure the distance of first to the 3rd lens sensor 41 to 43 and stop the big crooked of the sheet material 3 supplied with, make that under the situation of the sheet material 3 that clamper 15 clampings are supplied with, all following conditions are met.

1: when the direction of tilt of sheet material 3 was clockwise direction (the C.W. direction among Fig. 8), first lens sensor, 41 to the 3rd lens sensors 43 detected the summit of same lens 4 in order.

2: the first lens sensor 41 to the 3rd lens sensors 43 different summits of detecting different lens 4 constantly.

3: when the angle of inclination of sheet material 3 was clockwise direction, after first lens sensor 41 detected the summit of any lens 4, second lens sensor 42 detected the summit of same lens 4.

Under these conditions, based on transmit between the length L A and known first lens sensor 41 and second lens sensor 42 apart from S1, through the tilt angle theta of expression (1) calculating sheet material 3.The direction of tilt of supposing sheet material 3 is a clockwise direction.Between the tilt angle theta that use calculates and known first lens sensor 41 and the 3rd lens sensor 43 apart from S3, calculate the predicted value of the transmission length L B that when the 3rd lens sensor 43 detects the summit of the lens 4 identical with lens that detected by first lens sensor 41 4, is transmitted through expression (2).

(1)θ＝tan-1(LA/S1)

(2)LB＝S3×tanθ

After calculating the predicted value that transmits length L B; The transmission length and the detection signal of the 3rd lens sensor 43 that detection signal from first lens sensor 41 are reached the moment of its peak value are kept watch on, and from the relation between the two, judge direction of tilt.When the direction of tilt of sheet material 3 is clockwise direction as hypothesis, the detection signal of the 3rd lens sensor 43 with transmit the cooresponding position of length L B near reach its peak value.On the other hand, when the direction of tilt of sheet material 3 is anticlockwise direction, the detection signal of the 3rd lens sensor 43 with transmit the cooresponding position of length L B near do not reach its peak value.Therefore, the detection signal of the 3rd lens sensor 43 with transmit the cooresponding position of length L B near reach under the situation of its peak value, judge that the direction of tilt of sheet material 3 is a clockwise direction.In other cases, the direction of tilt of judgement sheet material 3 is an anticlockwise direction.

As indicated above anti-clockwise is judged is based on such hypothesis: when the actual tilt direction of sheet material 3 was anticlockwise direction, above-mentioned expression formula (1) and expression formula (2) were false.More particularly; When the direction of tilt of sheet material 3 is anticlockwise direction; Transmit length L A and be from first lens sensor 41 detect lens 4 the summit the time be carved into the transmission length L A in the moment that second lens sensor 42 detects the summit of next lens 4; Therefore, expression formula (1) and expression formula (2) are false.

After judging direction of tilt, carry out adjustment roughly.When the direction of tilt of the sheet material of judging 3 is during along the pointer direction, the tilt angle theta that will when judging direction of tilt, be calculated by expression formula (1) is set at rough adjustment angle of inclination, and towards anticlockwise direction with rough adjustment angle of inclination swing holder 15.Correspondingly, tilt angle theta almost becomes 0 °.

On the other hand; When the direction of tilt of the sheet material of judging 3 is anticlockwise direction; The moment that reaches its peak value with the detection signal of first lens sensor 41 is as benchmark, will detection signal from this benchmark to second lens sensor 42 near the distance calculation the peak value of this benchmark for transmitting length L 1.Next, through being adjusted the angle of inclination roughly as the above-mentioned expression formula of transmission length L 1 substitution (1) that transmits length L A.Then, toward the clockwise direction with rough adjustment angle of inclination swing holder 15.

At this moment, when immediate peak value was later than the peak value of the detection signal of first lens sensor 41 in the detection signal of second lens sensor 42, this immediate peak value was corresponding to the identical summit, summit of the lens 4 that formerly detect with first lens sensor 41.Therefore, in this case, the rough adjustment angle of inclination that calculates is the actual angle of inclination θ of sheet material 3 no better than.On the other hand; When immediate peak value in the detection signal of second lens sensor 42 during early than the peak of the detection signal of first lens sensor 41, this immediate peak value is carried the summit on previous summit corresponding to the summit of the lens 4 that detected than first lens sensor 41.Therefore, the rough adjustment angle of inclination that calculates in this case is different with actual angle of inclination θ, still, owing to needn't become 0 ° at rough adjustment medium dip angle θ, and thereby this does not constitute problem.

After rough adjustment, carry out meticulous adjustment.In meticulous adjustment; With the situation of calculating rough adjustment angle of inclination basically similarly; As benchmark, calculate from the detection signal of this benchmark to the three lens sensors 42 transmission length L 2 with the peak value of the detection signal of first lens sensor 41 near the peak value of this benchmark.Next, through obtaining meticulous adjustment angle of inclination as the above-mentioned expression formulas of transmission length L 2 substitutions (1) that transmit length L A.

After rough adjustment, the meticulous adjustment angle of inclination of calculating equals actual angle of inclination θ as indicated abovely.Because meticulous adjustment is carried out after rough adjustment, so tilt angle theta is enough little.Therefore, in meticulous adjustment, when the angle of inclination of sheet material 3 was anticlockwise direction, the peak value of the detection signal of the 3rd lens sensor 43 was later than the peak value of the detection signal of first lens sensor 41.On the contrary, when the angle of inclination of sheet material 3 was clockwise direction, the peak value of the detection signal of the 3rd lens sensor 43 was early than the peak value of the detection signal of first lens sensor 41.Therefore, can from the peak value of the detection signal of first lens sensor 41 and the 3rd lens sensor 43, judge direction of tilt.

Controller 24 is based on the direction of tilt of the sheet material of judging 3 and the meticulous adjustment angle of inclination rotation clamper 15 that calculates, so that make the tilt angle theta of sheet material 3 become 0 °.Note that when meticulous adjustment angle of inclination is 0 °, there is no need swing holder 15 in meticulous adjustment.

In Fig. 9, clamper travel mechanism 16 is made up of removable plate 51 and 52, cam 53, clutch plate 54a and 54b, electrical motor 55 etc.In a side of removable plate 52, be provided with another group cam 53, clutch plate 54a and (although not shown in the drawings) such as 54b, electrical motors 55 in an identical manner.

Removable plate 51 is connected with the side surface of platen drum 10 with 52, thereby platen drum 10 is clipped between removable plate 51 and the removable plate 52, and removable plate 51 and 52 can radially move.Make removable plate 51,52 biased downward through biasing devices such as for example springs 60, and removable plate 51,52 contacts with the camming surface of the cam 53 that is positioned at each removable plate 51,52 below.Cam 53 is connected with each side of platen drum 10 with rotatable mode.

The clutch plate 54b of motor side can as shown in the figure away from cam side clutch plate 54a the releasing position and with engage position that clutch plate 54a engages between move.At engage position, clutch plate 54a and 54b transmit rotation under nonslipping situation.When the position of rotation of platen drum 10 was set to position of readiness, clutch plate 54b can engage with clutch plate 54a.Position of readiness is to wait for the position of insertion that supplies to the sheet material leading section of the sheet material 3 between platen drum 10 and the clamper 15 from feed path 6.

Electrical motor 55 makes clutch plate 54b rotation under the control of controller 24.Thereby, make cam 53 rotations, and clamper 15 and removable plate 51 and 52 radially moved integratedly.On cam 53, be formed with camming surface 53a to 53c, camming surface 53a to 53c retreating position, first clip position and second clip position with clamper 15 respectively is corresponding.Through the anglec of rotation of adjusting cam 53, a face among the camming surface 53a to 53c contacts with the bottom surface of removable plate 51,52.Thereby clamper 15 moves to one of retreating position, first clip position and second clip position.

With each face among first clip position and cooresponding camming surface 53b of second clip position and the camming surface 53c be smooth; And camming surface 53b contacts with the bottom surface of removable plate 51,52 under following state with each face among the camming surface 53c, that is: the state that parallels with direction perpendicular to the moving direction of removable plate 51,52.This has identical biasing force to spring 60.Therefore, remove the position even clutch plate 54b is in, the biasing force of spring 60 stops the rotation of the cam of being pushed by removable plate 51,52 53, and clamper 15 is stably remained on first clip position or second clip position.

Note that with the cooresponding camming surface 53b of first clip position be connected through curved surface with the cooresponding camming surface 53c of second clip position, the diameter of this curved surface is equal to or less than the distance between the center of camming surface 53c and cam 53.Therefore, when clamper 15 moved between first clip position and second clip position, clamper 15 can not move to a side that surpasses second clip position of retreating position.

The end that is positioned at removable plate 52 1 sides of clamper 15 is provided with axle 56, and another end that is positioned at removable plate 51 1 sides is provided with two axles 57.One end of axle 56 is connected on the removable plate 52 and axle 56 can in rotational direction rotate in the radial center of platen drum 10.Removable plate 51 has and forms the long opening 51a parallel with the tangential direction of platen drum 10.Axle 57 extends through long opening 51a.Therefore, clamper 15 can rotate around the rotation axis (hereinafter be called clamper rotation axis) vertical with the sheet surface of sheet material 3.In the present embodiment, the clamper rotation axis passes the connection location of axle 56 and removable plate 52, but for example also can pass the center of clamper 15 on Width.

Clamper rotating mechanism 17 keeps mechanism, plate 58a and 58b, the actuator 59 etc. of clamper 15 to constitute by as indicated above with rotary way.Sliding panel 58a is fixed on the end that is positioned at removable plate 51 outsides of axle 56.Sliding panel 58b is moved between releasing position as shown in Figure 9 and sliding panel 58b and sliding panel 58a are with the engage position of suitable pressure closed contact.When platen drum 10 is in position of readiness, sliding panel 58b can with sliding panel 58a closed contact.

The surface of each sliding panel 58a, 58b has suitable elasticity and high friction coefficient.At engage position, sliding panel 58a and 58b slide integratedly.Note that sliding panel 58b is longer than sliding panel 58a on the moving direction of clamper 15.No matter clamper 15 is in any position in retreating position, first clip position and second clip position, sliding panel 58b can with sliding panel 58a closed contact.

Actuator 59 makes the sliding panel 58b that is in engage position slide under the control of controller 24.Thereby, make clamper 15 rotate sheet material 3 crooked that is held device 15 clampings with correction around the clamper rotation axis.Under the state that clamper 15 is set in second clip position, carry out this rotating operation.

When clamper 15 rotated, the distance between the end of sliding panel 58a and clamper 15 changed.Therefore, each in the above-mentioned axle 57 is extending and can shortens.Each receives the bias voltage towards the direction that makes its contraction in length that for example built-in spring applies.Therefore, axle 57 length can be extended and shortens according to the variation of the distance between the end of sliding panel 58a and clamper 15.Note that axle 56 can elongate or shorten.As selection, the surface of the removable plate 51 that contacts with each other and the surface of sliding panel 58a can form curved surface, make that the distance between the end of sliding panel 58a and clamper 15 can not change.

Note that as sliding panel 58a and 58b to be set at when removing the position that clamper 15 is can be owing to the friction force between sliding panel 58a and the removable plate 51 etc. not former thereby around the rotation of clamper rotation axis.Stop mechanism etc. can be set individually, to prevent moving unintentionally or rotating unintentionally of clamper 15.

As shown in Figure 1, rear end anchor clamps 27 circumferentially are arranged on the position away from clamper 15 suitable distances along platen drum 10.Rear end anchor clamps 27 are arranged on the both sides of platen drum 10, and the both sides of the edge of the rearward end of sheet material 3 are clamped between rear end anchor clamps 27 self and the outer surface 10b.

Shown in figure 10; Rear end anchor clamps 27 can move between following two positions: an end 27a of rear end anchor clamps 27 is clamped in the clip position between this end 27a self and the platen drum 10 with the lateral margin of sheet material 3, and this end 27a outwards opens to remove the releasing position to the clamping of sheet material from clip position shown in long and two-short dash line.

The switching mechanism 28 that is used to operate rear end anchor clamps 27 is made up of cam 61, clutch plate 62a and 62b, electrical motor 63 etc.The other end 27b of rear end anchor clamps 27 receives bias voltage, thereby contacts with the camming surface of cam 61, and changes the sliding position on the camming surface through the rotation of cam 61, thereby rear end anchor clamps 27 can and be removed between the position and move at clip position.

The clutch plate 62b of motor side is arranged on a little in advance in the position of separation claw 19 along the hand of rotation (in other words, along working direction) of platen drum 10 when printing.In order to operate rear end anchor clamps 27, platen drum 10 rotates to the position of rotation (being called rear end anchor clamps opened and closed positions hereinafter) of clutch plate 62a face phase clutch plate 62b.Clutch plate 62b moves between following two positions: the releasing position away from clutch plate 62b as shown in the figure, and the engage position that engages with clutch plate 62b.Clutch plate 62b power cam 53 rotations of the electrical motor 63 of controlled device 24 controls through being set at engage position.Thereby, rear end anchor clamps 27 are set in clip position and a position of removing in the position.

Next, the diagram of circuit with reference to shown in Figure 11 describes the printing on the cylinder sheet material.The input I/F (not shown) of the quantitative data input chopping machine 2 of two visual point images of the same scene that at first, will see from different viewpoints.This two visual point image is stored in the memory device (not shown) of controller 24 as anaglyph provisionally.The data transfer part that is arranged in the controller 24 reads two visual point images from memory device, and converts two visual point images the data of six visual point images into.The data of six visual point images are stored in the memory device once more.

When beginning was printed in indication, controller 24 confirmed that the sliding panel 58b that platen drum 10 is in position of readiness, clamper rotating mechanism 17 is in the releasing position.Next, controller 24 makes clutch plate 54b engage with clutch plate 54a, through control clamper travel mechanism 16 clamper 15 is moved to retreating position then.Note that and to pass through the position of detection clampers 15 such as position transduser, and can control clamper travel mechanism 16 based on testing result.When clamper 15 is moved into retreating position, can detects the position of rotation of clamper 15 through rotary encoder etc., and can control clamper rotating mechanism 17, thereby make clamper 15 parallel with main scanning direction based on testing result.

After clamper 15 is set to retreating position, supply to the feed path 6 from the sheet material 3 of sheet feed cassette 9 with single page.Then, the feeding-in roll 7 by electrical motor 12 driven in rotation transmits sheet material 3 in interlock sheet material 3 downstream.Through this transmission, sheet material 3 is transferred into platen drum 10 through transducing part 8.Detect moment of the leading section of sheet side 3 from transducing part 8, feeding-in roll transmits certain length to 7 with sheet material 3.Then, after the sheet material leading section was carried out the preparation that is held device 15 clampings, the rotation of electrical motor 12 stopped stopping the transmission of sheet material 3.

After the transmission of sheet material 3 stopped, controller 24 started clamper travel mechanism 16, and clamper 15 is set in first clip position.Thereby, the sheet material leading section is clamped between the outer surface 10b of clamper 15 and platen drum 10.At this moment, because clamper 15 is in first clip position, so the whole press surface 32a of pressing component 32 and sheet material leading section closed contact.

After clamper 15 clamping sheet material leading sections, feeding-in roll is to the interlock of 7 releasings to sheet material 3, and the clutch plate 54b of clamper travel mechanism 16 moves to the releasing position.In addition, after confirming that heat 18 is set at retreating position, controller 24 actuating motors 14.Thereby platen drum 10 is along positive veer rotation, and beginning transmits sheet material 3 along sub scanning direction.

During transmitting, controller 24 is based on carrying out from the detection signal of lens sensor 41 to 43 to the judgement of direction of tilt with to the calculating at rough adjustment angle of inclination.As indicated above; The direction of tilt of lens 4 is based on from the detection signal of lens sensor 41 to 43 and judges, and calculates based on the detection signal of first lens sensor 41 and second lens sensor 42 after to the judgement of direction of tilt and adjust the angle of inclination roughly.

After the judgement and calculating accomplished direction of tilt to rough adjustment angle of inclination, the hand of rotation of switching motor 14, thereby platen drum 10 contrarotations and return position of readiness.At this moment, transmit sheet material 3 to the upper reaches of feed path 6.

When platen drum 10 stopped at position of readiness, clutch plate 54b engaged with clutch plate 54a.After this, clamper travel mechanism 16 moves to second clip position with clamper 15 from first clip position.In this moved, clamper 15 directly moved to second clip position and prevents that through the hand of rotation of controlling cam 53 clamper 15 is set at retreating position from first clip position.Correspondingly, press surface 32a moves away from sheet material 3 ground, and only pushes the sheet material leading section by jut 32b.

Then, sliding panel 58b moves to the engage position that engages with sliding panel 58a, comes swing holder 15 by clamper rotating mechanism 17 then.At this moment, the operation of control actuator 59 makes the clamper 15 courts direction opposite with the direction of tilt of being judged rotate and the identical angle in rough adjustment angle of inclination.

When clamper 15 rotated as indicated abovely, sheet material 3 rotated together with clamper 15, and the position of sheet material 3 is changed, to adjust lens 4 roughly in the vertical with respect to the inclination of main scanning direction.At this moment, because clamper 15 is set at second clip position, so the sheet material leading section can be from jut 32b slippage, but can be easily from the front surface slippage of drum main body 34.Therefore, sheet material 3 only accurately rotates rough adjustment angle of inclination.

After accomplishing rough adjustment, sliding panel 58a is set at and removes the position, and clamper travel mechanism 16 moves to first clip position with clamper 15 from second clip position.In this moved, clamper 15 was directly moved to first clip position from second clip position, and can not be set at retreating position.

After clutch plate 54b was set at the releasing position, platen drum 10 was along positive veer rotation, and sheet material 3 beginnings are rotated along sub scanning direction.During the transmission of sheet material 3, calculate meticulous adjustment angle of inclination based on detection signal from first lens sensor, 41 to the 3rd lens sensors 43.

After calculating meticulous adjustment angle of inclination, the hand of rotation of switching motor 14, and make 10 contrarotations of platen drum and return position of readiness.When platen drum 10 stopped at position of readiness, identical with the situation of rough adjustment, clamper travel mechanism 17 moved to second clip position with clamper 15 from first clip position.After this; Sliding panel 58b returns engage position; Then, clamper rotating mechanism 17 is based on coming swing holder 15 to the judged result of direction of tilt with to the result of calculation at meticulous adjustment angle of inclination, thereby in meticulous adjustment, makes the vertically parallel with main scanning direction of lens 4.

After accomplishing meticulous adjustment, sliding panel 58b is moved into and removes the position, and clamper travel mechanism 16 moves to first clip position with clamper 15.After this, power-transfer clutch 54b is set at and removes the position.

After having proofreaied and correct sheet material 3 crooked, sheet material 3 is wound on the platen drum 10 as indicated abovely.For sheet material 3 is wound on the platen drum 10, platen drum 10 is rotated in the forward.Through this rotation, sheet material 3 is drawn out feed path 6 and is wrapped in then on the outer surface 10b.During the transmission of sheet material 3, check the lenticular spacing of sheet material 3 based on the testing result of transducing part 8.For example note that can with lenticular spacing be calculated as from the detection signal of transducing part 8 arrive its peak value the time be carved into the transmission length that detection signal arrives the moment of its next peak value.

Be that the rearward end of convenient sheet material 3 is wrapped in 10 last times of platen drum, platen drum 10 also continues rotation, up to platen drum 10 arrival rear end anchor clamps opened and closed positions.When platen drum 10 stopped at rear end anchor clamps opened and closed positions, clutch plate 62b engaged with clutch plate 62a, and switching mechanism 28 is set in clip position with rear end anchor clamps 27.Thereby the sheet material leading section is by rear end anchor clamps 27 clampings.

Clutch plate 62b is set at and removes the position, and platen drum 10 is rotated in the forward.When clamper 15 moved to the position above hot 18, platen drum 10 stopped.The image receiving layer of printed films 21 be set at heat 18 under after, heat 18 is moved to pressing position.Thereby heat 18 is pressed into image receiving layer on the back side of sheet material 3.

After the pushing of heat 18, platen drum 10 is rotated in the forward once more.Thereby beginning transmits sheet material 3 along sub scanning direction.Synchronously supply with image receiving layer with the transmission of sheet material 3.After sheet material 3 began to transmit, controller 24 was kept watch on the transmission length of sheet material 3 based on the quantity of the drive pulse that is supplied to electrical motor 14.When keep watch on transmitting length detection and arrive heat 18 to the print area of sheet material 3, head driver 22 is formed image receiving layers by indication.

Two heater element array 18a supply public power of head driver 22 thermotropism heads 18 are so that produce heat in heater element array 18a, and add heat picture and accept film.Thereby image is accepted film by heating equably, and two lines of the transparent image receiving layer that extends along main scanning direction for example are transferred among the 5a of zonule abreast.

After two lines that on the 5a of zonule, form image receiving layer, sheet material 3 only is transmitted and the cooresponding transmission length of sixth of detected lenticular spacing before this.This indexing transfer amount is corresponding with the print span of single stripe pattern and equal the width of zonule.Meanwhile, image is accepted film and is moved two lines.After this moved, heat 18 is started to add heat picture once more accepted film.Thereby, image receiving layer is formed on the zonule 5b with the zonule 5a adjacency that formerly forms image receiving layer.

Likewise, accept the transmission of film,, and finally on whole print area, form transparent image receiving layer based on two line formed image receiving layers through sheet material 3 and image.

After the formation of accomplishing image receiving layer, hot 18 is returned retreating position.Platen drum 10 continues to be rotated in the forward, and when clamper 15 moved to the position away from heat 18, platen drum 10 stopped.After this, with the yellow ink film of printed films 21 be set in heat 18 under, and heat 18 moved to pressing position.Thus, yellow ink film covers the back side of sheet material 3.

After the pushing of heat 18, platen drum 10 is rotated in the forward to transmit sheet material 3 once more.At this moment, controller 24 is kept watch on the transmission length of sheet materials 3, and when hot 18 heater element array 18a is positioned at the first zonule 5a of print area, from six visual point images, reads the for example line of two adjacency of the yellow image of first visual point image.Based on the data-driven of yellow image heat 18.Heat through being produced by two heater element array 18a heats from the back side to yellow ink film.Thereby, be attached on the image receiving layer of zonule 5a from the yellow ink of yellow ink film distillation.As a result, the single stripe pattern of being made up of the yellow image of two lines is printed on the 5a of zonule.After the printing on the 5a of zonule, sheet material 3 is only by the cooresponding transmission length of the sixth of the rotation transmission of platen drum 10 and lenticular spacing.When transmitting sheet material 3, yellow ink film is wound for and makes the not use of yellow ink film partly replace to have used part in the face of heat 18.After transmitting; Read the line of two adjacency of the yellow image data of second visual point image; And head driver 22 makes two heater element array 18a produce heat according to the yellow image data, thereby will be printed on the 5b of zonule by the stripe pattern that two lines of yellow image are formed.

Likewise; When sheet material 3 and yellow ink film are transmitted with the cooresponding transmission length of the sixth of lenticular spacing; Two lines based on the yellow image data start hot 18, so that the stripe pattern of first to the 6th visual point image is printed to respectively on the 5a to 5f of zonule.

When yellow image was printed on the whole print area of sheet material 3 fully, heat 18 was moved into retreating position.Platen drum 10 continues to be rotated in the forward, and stops at clamper 15 through overheated 18 position.Then, supply with printed films 21 in case with the magenta ink film be set in heat 18 under.After this, heat 18 is moved to pressing position.

Situation as above-mentioned yellow image is the same; When transmitting sheet material 3 off and on the magenta ink film; Each magenta color image of first to the 6th visual point image is split into stripe pattern, and the back side that stripe pattern is printed to sheet material 3 is to cover the stripe pattern of yellow image.After accomplishing the single width picture of magenta color image, use the bluish-green ink film with the bluish-green image print to sheet material 3.

After printing the bluish-green image, heat 18 is moved to retreating position.Platen drum 10 continues to rotate to clamper 15 through overheated 18 position, and stops at this position.After this, with the back sheet of printed films 21 be set in heat 18 under, then heat is moved to pressing position.When transmitting sheet material 3 off and on once more, start heat 18 so that printed on the print area of image of three kinds of colors above that and form back sheet through being rotated in the forward of platen drum 10.

After forming back sheet, heat 18 is moved to retreating position.Platen drum 10 rotates a bit forward, stops at rear end anchor clamps opened and closed positions then.After platen drum 10 stopped, clutch plate 62b moved to engage position, through switching mechanism 28 rear end anchor clamps 27 was moved to then and removed the position.Separation claw 19 is rocked to the position of peeling off that separation claw 19 contacts with outer surface 10b.

After this, platen drum 10 contrarotations.When the rearward end of sheet material 3 arrived the position of separation claw 19 through this contrarotation, separation claw 19 scooped up the rearward end of sheet material 3 from outer surface 10b.Platen drum 10 continues contrarotation, thereby sheet material 3 is guided to cutter unit 25 from its rear end.

When platen drum 10 arrived position of readiness through contrarotation, the contrarotation of platen drum 10 stopped provisionally.At this moment, the sheet material 3 that is fed into cutter unit 25 has reached constant length, and the connecting gear of cutter unit 25 can transmit sheet material 3.

When platen drum 10 stopped at position of readiness, as indicated above, clamper travel mechanism 16 moved to retreating position with clamper 15.After this, because the connecting gear of cutter unit 25 transmits sheet material 3, therefore, the leading section of sheet material 3 is drawn out between clamper 15 and platen drum 10, and whole sheet material 3 is transferred into cutter unit 25.In cutter unit 25, excised as sheet material leading section and the sheet material rearward end of not printing the margin that image is arranged, and remaining sheet material 3 is discharged from.Print if on another page sheet material 3, carry out, repeat said process.

In the above-described embodiments; The non-formation zone that does not form elastic layer is the rectangular shape that on main scanning direction and sub scanning direction, has proper width; But; Non-formation zone also can be other shapes, as long as non-formation in the zone that the be rotated mechanism of the zone of facing mutually with jut and jut that the zone is formed on the perimeter surface of platen drum at least moves.In the embodiment shown in fig. 12, regional 36a of non-formation and the 36b part that only is formed on jut 32b and sheet material 3 closed contacts add this part around.When proofreading and correct sheet material 3 crooked, because clamper 15 rotates and jut 32b moves, therefore regional 36a of non-formation and 36b are formed in the moving area of jut 32b.Note that in this embodiment of Figure 12 consider that clamper and axle 56 articulate, the regional 36b of non-formation that is positioned at axle 56 sides is less, and it is bigger to be positioned at the regional 36a of non-formation of axle 57 sides.

The size that is arranged on the jut on the pressing component 32 can differ from one another.In the embodiment shown in fig. 13; Be positioned at clamper 15 the pivot joint side to move less jut 71 with respect to another jut 72 less, and the mobile more jut 72 that is positioned at the opposite side that articulates side is greatly to increase and the size of the contact area of sheet material 3.The quantity that note that the jut on the pressing component that is arranged on clamper 15 can be three or more a plurality of.

In above-mentioned each embodiment, described the platen drum type chopping machine that has as the platen of support component drum, but also can use the flat platen platform that moves integratedly with clamper etc. to replace the platen drum.In another example, the air roll that fixing platen platform perhaps has little diameter can be set in position towards the heat head.The heat head can be pressed into platen platform or the sheet material that is used to print above the air roll with sheet material; Simultaneously sheet material can be clamped in clamper and be independent of between the support component that the platen platform is provided with, and support component can be mobile integratedly with the transmission sheet material along sub scanning direction with clamper.

In above-mentioned each embodiment, described line printer, but the present invention also is applicable to the chopping machine such as other types such as serial printers.In addition, the present invention is not only applicable to the anaglyph of print record 3D rendering, also is applicable to print the so-called modified-image that visual image wherein changes along with the variation of observation place.Except the subliming type thermal printer, the present invention can also be applied in heat molten type thermal printer, the ink jet printer etc.

In addition, though the top chopping machine of having described except that chopping machine, also is applicable to various types of devices that needs switch according to holding device of the present invention between skew corrected state and sheet material stationary state.For example, the present invention is applicable to the paper cutter that the cylinder sheet material is cut into suitable dimensions with the vertical perpendicular or parallel mode of cut direction and lens.In this paper cutter, the cylinder sheet material on the support component is held that device is pushed and clamping.For cylinder correction sheet material crooked with respect to cutting blade, clamper is set in second clip position and swing holder.When cutting cylinder sheet material, clamper is set in first clip position to prevent the slip of cylinder sheet material.Certainly, the present invention can be used for not transmitting the situation of sheet material.

As long as processes such as holding device and image print, cutting do not interfere in the process of clamp column facesheet, any part that holding device just can the clamp column facesheet.In chopping machine, the cylinder sheet material can be held does not have any part of print image place above that, and this part can be the end of sheet material, comprises sheet material leading section, sheet material rearward end, side end etc.The cylinder sheet material is being cut under the situation of constant dimensions, the cylinder sheet material can be clamped in the office, intermediate portion.

Description of reference numerals

2 chopping machines

3 cylinder sheet materials

4 lens

8 transducing parts

10 platens drum

15 clampers

16 clamper travel mechanisms

17 clamper rotating mechanisms

18 hot heads

24 controllers

32 pressing components

The 32a press surface

The 32b jut

Claims

1. holding device comprises:

Clamper, it has pressing component, and said pressing component has elasticity, and said clamper is used for the part of cylinder sheet material is clamped between said pressing component and the support component, and said support component is used to support at least a portion of said cylinder sheet material;

Clamper travel mechanism; It is used to make said clamper between retreating position, first clip position and second clip position, to move; At said retreating position; Said pressing component is away from said support component; At said first clip position; Said pressing component is pushed the said part of said cylinder sheet material to prevent between said cylinder sheet material and the said pressing component and the slip between said cylinder sheet material and the said support component, and at said second clip position, said pressing component is pushed the said part of said cylinder sheet material to prevent the slip between said cylinder sheet material and the said pressing component and to allow the slip between said cylinder sheet material and the said support component;

The clamper rotating mechanism, it is used for around rotating said clamper with the vertical rotation axis of said cylinder sheet material; And

Controller, wherein

When the said cylinder sheet material that rotation is held, said controller is controlled said clamper travel mechanism and said clamper rotating mechanism, so that said clamper is set in said second clip position and rotates said clamper;

When being fixed on said cylinder sheet material on the said support component, said controller is controlled said clamper travel mechanism, so that said clamper is set in said first clip position.

2. holding device according to claim 1, wherein

Said pressing component has a plurality of juts, and said jut is formed on the press surface of facing mutually with said support component;

Said first clip position is represented such position: in this position; Said press surface on being pressed against the said part of said cylinder sheet material in the compression said each jut so that the said part of said cylinder sheet material is clamped between said press surface and the said support component; And

Said second clip position is represented such position: in this position; Said each jut is pressed against on the said part of said cylinder sheet material with littler amount of compression when being in said first clip position, so that the said part of said cylinder sheet material is clamped between said each jut and the said support component.

3. holding device according to claim 2; Wherein, The size of said jut is corresponding with the distance from said rotation axis to said jut; And at said second clip position, the zone that contacts with said cylinder sheet material of said jut is according to distance from said rotation axis to said jut and different.

4. according to claim 2 or 3 described holding devices; Wherein, Beyond the surf zone of said support component; At least add the non-formation of can being assigned to of the above jut zone with zone that said jut is faced mutually, and all the other zones are assigned to and form the zone by the zone that said clamper rotating mechanism moves, and the rubber-like elastic layer be formed on said formations zone upward so that the friction coefficient in the said non-formation zone less than the friction coefficient in the said formation zone.

5. holding device according to claim 4; Wherein, The said part of facing mutually with said press surface that form that the zone comprises said support component; Thereby when said clamper was in said first clip position, the said part of said cylinder sheet material was clamped between said press surface and the said elastic layer.

6. chopping machine; Said chopping machine has the printing portion that transmits the cylinder sheet material along sub scanning direction; Be formed with a plurality of lens in the front of said cylinder sheet material; And said chopping machine is in turn printed a plurality of stripe patterns parallel with main scanning direction at the back side of said cylinder sheet material, and said main scanning direction is perpendicular to said sub scanning direction, and said chopping machine comprises:

Platen, it is used to support said cylinder sheet material and said cylinder sheet material is moved along said sub scanning direction;

Clamper, it has pressing component, and said pressing component has elasticity, and said clamper is used for the sheet material end of said cylinder sheet material is pressed on the said platen so that said sheet material end clips is held between said clamper self and the said platen;

Clamper travel mechanism; It is used to make said clamper between retreating position, first clip position and second clip position, to move; At said retreating position; Said pressing component is away from said platen, and at said first clip position, said pressing component is pushed said sheet material end to prevent between said cylinder sheet material and the said pressing component and the slip between said cylinder sheet material and the said platen; At said second clip position, said pressing component is pushed said sheet material end to prevent the slip between said cylinder sheet material and the said pressing component and to allow the slip between said cylinder sheet material and the said platen;

Crooked test section, it is used to detect the crooked of said cylinder sheet material;

Controller, wherein

When proofreading and correct said cylinder sheet material said crooked with respect to said main scanning direction; Said controller is controlled said clamper travel mechanism and said clamper rotating mechanism; So that said clamper is set in said second clip position, and rotate said clamper based on the testing result of said crooked test section; And

When transmitting said cylinder sheet material along said sub scanning direction; Said controller is controlled said clamper travel mechanism; So that when said platen moves along said sub scanning direction, said clamper travel mechanism is set in said first clip position with said clamper.

7. chopping machine according to claim 6, wherein

Said pressing component has a plurality of juts, and said jut is formed on the press surface of facing mutually with said platen;

Said first clip position is represented such position: in this position, said press surface on being pressed against said sheet material end in the compression said each jut so that said sheet material end is clamped between said press surface and the said platen; And

Said second clip position is represented such position: in this position; Said each jut is pressed against on the described said part with littler amount of compression when being in said first clip position, so that described said part is clamped between said each jut and the said platen.

8. chopping machine according to claim 7; Wherein, The size of said jut is corresponding with the distance from said rotation axis to said jut; And at said second clip position, the zone that contacts with said sheet material end of said jut is according to distance from said rotation axis to said jut and different.

9. according to claim 7 or 8 described chopping machines; Wherein, Beyond the surf zone of said platen, add the non-formation of can being assigned to of the above jut zone with the zone that said jut is faced mutually at least, and all the other zones are assigned to the formation zone by the zone that said clamper rotating mechanism moves; And the rubber-like elastic layer is formed on the said formation zone, and the friction coefficient in the said non-formation zone is less than the friction coefficient in the said formation zone.

10. chopping machine according to claim 9; Wherein, The said part of facing mutually with said press surface that form that the zone comprises said platen; Thereby when said clamper was in said first clip position, the said part of said cylinder sheet material was clamped between said press surface and the said elastic layer.

11. according to each described chopping machine in the claim 6 to 10, wherein, said platen is the rotatable platen drum that is twining said cylinder sheet material on it.

12. according to each described chopping machine in the claim 1 to 11, wherein, the sheet material leading section of said cylinder sheet material is clamped between said clamper and the said platen.