CN100524055C - Printing apparatus and printing method - Google Patents
Printing apparatus and printing method Download PDFInfo
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- CN100524055C CN100524055C CNB2005101167987A CN200510116798A CN100524055C CN 100524055 C CN100524055 C CN 100524055C CN B2005101167987 A CNB2005101167987 A CN B2005101167987A CN 200510116798 A CN200510116798 A CN 200510116798A CN 100524055 C CN100524055 C CN 100524055C
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Abstract
A U-shaped transport path has a pair of transport rollers (200,210) and a pair of rotating rollers which convey the sheet material (S) at the maximum curvature along the U-shaped transport path so that an image recording apparatus can be miniaturized.
Description
Technical field
The present invention relates to a kind of being used for the image recording structure of image recording on rectangular basically sheet-shaped recording medium, and a kind of sheet material conveyor.
Background technology
Figure 21 is the cut-open view of traditional sheet material conveyor.
In Figure 21, sheet material conveyor in the direction of arrow A (among Figure 21 left) by conveying roller to 1102 feeding sheets S, its guiding is entered U-shaped transport path 1101 with bend 1101a.In this structure, sheet material S carries above to 1102 at conveying roller along U-shaped transport path 1101.
Conveying roller 1102 is driven rotationally by the driver element (not shown), with the surface action friction force to sheet material S, and sheet material S is advanced in the direction of arrow A.
Figure 22 is the cut-open view that comprises with the traditional images pen recorder of the similar recording medium conveying apparatus of sheet material conveyor of Figure 21.
In the recording medium conveying apparatus of Figure 22, the sheet material S that thin slice feed rolls 1206 will be stacked on the sheet-stacking unit 1201 is fed to U-shaped transport path 1202.Sheet material S with the U-shaped guiding, is fed to the print unit 1203 that is arranged in 1201 tops, sheet-stacking unit by U-shaped transport path 1202 then.
After image recording, sheet material S is fed to U-shaped transport path 1204 by distributing roller 1207, and is being discharged to the discharge platform 1205 that is arranged in above the print unit 1203 in by 1204 guiding of U-shaped transport path in the mode of bending.
Like this, in order to change the throughput direction of the sheet material in sheet material conveyor, use the U-shaped transport path usually, this sheet material conveyor feeding sheets S is with the processing of being scheduled to.
Relevant technology is disclosed among Japanese Patent Application No.2002-234636 and the Japanese Patent Application No.9-40230.
As shown in figure 22, each bend of U-shaped recording medium transport path 1202,1204 can adopt various curvature.Curvature is set to the maximal value shown in Figure 23 A, is the minimum value shown in Figure 23 C, and is the intermediate value shown in Figure 23 B.
When curvature such as Figure 23 C are depicted as hour, it is big that whole plant bulk becomes, and be depicted as when big whole device dimensions shrink as curvature such as Figure 23 A.
On the other hand, if curvature big like that shown in Figure 23 A, when sheet material S was fed to U-shaped transport path 1202,1204, sheet material S may be the state of buckling by bends, and sheet material S can not be transferred.
So, as long as sheet material S can be transferred and by this path, the curvature of U-shaped transport path should be preferably big as far as possible.Usually, when sheet material S had been fed to U-shaped transport path 1202,1204, sheet material S can be called " maximum curvature " along the crooked reposefully maximum curvature of U-shaped transport path 1202,1204.
The factor of determining " maximum curvature " comprises the position of material (friction factor), driving force and the conveying roller of transporting velocity, transport path, yet the thickness of U-shaped sheet material S and width are to determining that " maximum curvature " has the factor of the most direct influence.
That is to say that if sheet material S is thick or wide, sheet material S has big rigidity, difficulty so bent sheet S becomes.Therefore reduce maximum curvature, the result, the size of entire image pen recorder becomes bigger.
In above-mentioned traditional sheet material conveyor, the thickness or the width of selected sheet material define " maximum curvature ", and the miniaturization of installing has been applied restriction.On the other hand, if " maximum curvature " fixes, " maximum curvature " defines the upper limit of the thickness and the width of the sheet material that can carry.
Image forming method based on record-header adopts is used for according to image information the printing equipment that image is formed on the recording chart can being categorized into thermal transfer type, sensible heat type, inkjet type, dot matrix type and laser beam type etc.Figure 24 is the diagram vertical cross section that the illustrative arrangement of thermal transfer type printing equipment is shown.In Figure 24, Reference numeral 2101 expressions are as the hot head of record-header; Reference numeral 2102 expressions are used to guide and support the rolling roller that recording chart P passes through hot 2101; Reference numeral 2103 expressions apply the ink sheet of transfer ink; And Reference numeral 2104 expression is arranged in heat 2101 downstream along throughput direction, and to be used for the thin slice feed rolls of feeding recordable paper P right.
To 2104 just in feeding recordable paper P, recording chart P is by rolling roller 2102 pressure contact warm 2101 at the thin slice feed rolls, and the heat of the China ink of ink sheet 2103 by its generation is transferred on the recording chart P.In this process, exert pressure by heat 2101 with when rolling roller 2102 contact at recording chart P, recording chart P by thin slice feed rolls 2104 along direction of arrow pulling and conveying.Make like this recording chart P constantly be heated 2101 and thin slice feed rolls 2104 between tension force, make and carry accurately.Printing is carried out on by the recording chart P that so accurately carries by hot 2101.Use the thermal transfer type printer of heat head for example disclosing among the Japanese patent gazette No.9-93501.
Figure 25 is the diagram vertical cross section that the illustrative arrangement of inkjet type printing equipment is shown.In Figure 25, Reference numeral 2201 is expressed as the print cartridge that storage is used for the China ink of image formation; Reference numeral 2202 expression is as the ink gun of image formation unit, comprises that be used for selectively will be from a plurality of escape holes of the China ink ejection of Inkjet Cartridge 2201 supplies based on image information; Reference numeral 2203 expression carrying print cartridges 2201 and ink gun 2202 and the carriage that moves back and forth along main scanning direction; Reference numeral 2204 expressions are used to guide and support the guide shaft of the carriage 2203 that moves back and forth; Reference numeral 2205 expressions are arranged in the thin slice feed rolls of ink gun 2202 along the upstream of throughput direction, are used for feeding recordable paper P; And Reference numeral 2206 expressions are used to support the platen that just is being fed by the recording chart P of ink gun 2202.
Carriage 2203 is moved Width (along direction perpendicular to this figure) the back and forth driving of unit (not shown) along recording chart.Record-header 2202 synchronously is driven based on moving of image information and carriage 2203, thus China ink according to the escape hole row ejection of image from record-header 2202, with image print on recording chart P.When finishing length (the record width of delegation) with described a plurality of escape holes when printing accordingly, thin slice feed rolls 2205 is carried predetermined spacing with recording chart P, and recording chart P stops at next line.Then, carriage 2203 is moved once more, and record-header 2202 is driven the printing next line.Like this, the thin slice feeding of the record of delegation and preset space length alternately repeats, to print on recording chart P.
Nowadays, following needs are increased, that is, print image information with photographic means simply, and the photograph as no margin does not stay margin ground to print on whole recording chart from digital camera and digital camera etc.Yet, as in printing equipment shown in Figure 24, thin slice feed rolls 2104 is being arranged in record-header 2101 (heat head) along under the situation in the downstream of throughput direction, the zone that can not print appears at the leading section (forward position) of recording chart P, is two scopes shown in the arrow X.On the other hand, be arranged in record-header 2202 along under the situation of the upstream of throughput direction at thin slice feed rolls 2205, the zone that can not print appears at the rearward end of recording chart P, is the scope shown in the double-head arrow Y.
If by thin slice feed rolls 2104 and 2205 clampings, recording chart P can not be transferred recording chart P, and if recording chart P be not transferred, recording chart P can not be printed, the scope that can not print appears in the result.So, under the situation of Figure 24, in the scope shown in the double-head arrow X of the leading section of recording chart P, do not print, and under the situation of Figure 25, in the scope shown in the double-head arrow Y of the rearward end of recording chart P, do not print.As solution to the problems described above, the thin slice feed rolls is arranged in the front and back of image formation unit (record head).
Figure 26 is the diagram vertical cross section that the illustrative arrangement of printing equipment is shown, wherein, the thermal transfer type printing equipment of Figure 24 has thin slice feed rolls 2105 at record-header 2101 along the upstream of throughput direction in addition, and Figure 27 is the diagram vertical cross section that the illustrative arrangement of printing equipment is shown, wherein, the inkjet type printing equipment has thin slice feed rolls 2207 at record-header 2202 along the downstream of throughput direction in addition.According to the structure shown in Figure 26 and 27, incessantly under the state by at least one pair of thin slice feed rolls clamping, recording chart is transferred by image formation unit at recording chart P, does not produce margin thereby image can be printed on the whole surface of recording chart P.
Yet, as Figure 26 and shown in Figure 27, to carry out under the situation of carrying by two groups of thin slice feed rolls, image formation unit is inevitably between two groups of different thin slice feed rolls.In the structure of being carried by two groups of thin slice feed rolls, the diameter of roller and transporting velocity have to do fine adjustment to prevent image formation unit and lose or increase excessively the tension force of recording chart.Accurately processing and control automatically of height that this needs parts has caused technical matters complicated as the maximization of device or control system.
Summary of the invention
Make the present invention in order to solve above-mentioned existing issue.The present invention is intended to: when recording chart has definite thickness and width, " maximum curvature " than big in the past transport path is set, so that equipment miniaturization.In other words, the present invention is intended to: when transport path has definite " maximum curvature ", can carry thickness and width than big in the past recording chart.
In addition, the present invention aims to provide a kind of printing equipment and a kind of Method of printing, even be not arranged in the front and back of image formation unit when the thin slice feed rolls and be arranged in the front of image formation unit or during the back, this printing equipment and Method of printing also can be on the whole surface of recording chart print image and do not produce margin.
According to an aspect of the present invention, sheet material conveyor comprises: record cell, and it is document image on rectangular basically sheet-shaped recording medium; Transport path, its edge is carried this sheet-shaped recording medium perpendicular to the direction of the normal to a surface of this sheet-shaped recording medium towards this record cell, and having a bend that is formed on this transport path, this bend has makes the curvature that is transferred this sheet-shaped recording medium by this transport path partly become big shape; And rotating unit, it rotates this sheet-shaped recording medium around the axis along this surface normal of this sheet-shaped recording medium in this transport path, wherein, from beginning the rotating operation of this sheet-shaped recording medium in this transport path to the process that finishes this rotating operation, this rotating unit increases the part of this sheet-shaped recording medium that arrives this bend.
According to above-mentioned structure, when sheet-shaped recording medium had definite thickness and width, it is bigger than in the past that " maximum curvature " can be set, so that equipment miniaturization.In other words, when sheet-shaped recording medium has definite " maximum curvature ", the sheet-shaped recording medium that can be provided with allow that thickness and width are bigger than in the past.
In another aspect of this invention, rotating unit comprises: grip unit, and they are this sheet-shaped recording medium of clamping on two surfaces of this sheet-shaped recording medium; And the rotating drive unit, it rotates this grip unit around the center of rotation axis along this normal on this surface of this sheet-shaped recording medium.In another aspect of this invention, rotating unit comprises: supply unit, and its edge advances this sheet-shaped recording medium perpendicular to the direction of this normal on this surface of this sheet-shaped recording medium; And against the unit, it stops this sheet-shaped recording medium to be advanced.In another aspect of this invention, rotating unit comprises: first supply unit, and its edge advances this sheet-shaped recording medium perpendicular to the direction of this normal on this surface of this sheet-shaped recording medium; And second supply unit, it is along perpendicular to the direction of this normal on this surface of this sheet-shaped recording medium and along the direction that is different from the working direction that is driven by this first supply unit this sheet-shaped recording medium being advanced.
According on the other hand, image recording structure comprises: transport path, this rectangular basically sheet material is carried perpendicular to the direction of the normal to a surface of sheet material in its edge, and has a bend that is formed on this transport path, what this bend had is shaped as, and makes the curvature that is transferred this sheet material by this transport path partly become big; And rotating unit, its axis around this normal on this surface that is parallel to this sheet material in this transport path rotates this sheet material, wherein, from beginning the rotating operation of this sheet material in this transport path to the process that finishes this rotating operation, this rotating unit increases the part of this sheet-shaped recording medium that arrives this bend.
According to above-mentioned structure, when sheet-shaped recording medium had definite thickness and width, it is bigger than in the past that " maximum curvature " can be set, so that equipment miniaturization.In other words, when sheet-shaped recording medium had definite " maximum curvature ", what sheet-shaped recording medium can be set allowed that thickness and width are bigger than in the past.
And, according to aspect further, being used for the printing equipment of print image, it comprises: image formation unit, it forms image on recording chart; Supply unit, it carries this recording chart by this image formation unit; And rotating unit, it rotates recording chart around the axis along the surface normal of recording chart in this transport path makes this recording chart reverse with respect to fore-and-aft direction, wherein, this printing equipment carries out in proper order: first print procedure, when this recording chart when this image formation unit, this image of printing in the zone except the scope of this recording chart one end of not applying carrying capacity by this supply unit; Reverse procedure, it rotates recording chart around the axis along the surface normal of recording chart makes this recording chart reverse with respect to fore-and-aft direction; And second print procedure, when this recording chart during by this image formation unit, this image of printing in the zone except the scope of this recording chart other end of not applying carrying capacity by this supply unit.
So, the sheet-shaped recording medium with definite thickness and width can be carried by having the transport path than big in the past " maximum curvature ", so that device can miniaturization.In other words, even when transport path has definite " maximum curvature ", also can carry thickness and width than big in the past recording chart.
And, in a still further aspect, a kind of printing equipment and a kind of Method of printing are provided, even be not arranged in the front and back of image forming part when the thin slice feed rolls and only be arranged in the front of image forming part or during the back, this printing equipment and Method of printing also can be on the whole surface of recording chart print image and do not produce margin.
The further characteristics of the present invention will be from becoming clear below in conjunction with accompanying drawing to the detailed description of one exemplary embodiment.
Description of drawings
Incorporate into and constitute the accompanying drawing of the part of instructions, embodiments of the invention have been described, and and instructions together, be used for explaining principle of the present invention.
Fig. 1 is the skeleton view of sheet material conveyor according to an embodiment of the invention.
Fig. 2 is the side view along the sheet material conveyor of Fig. 1 of the direction observation of arrow 1B.
Fig. 3 is the upward view along the sheet material conveyor of Fig. 1 of the direction observation of arrow 1A.
Fig. 4 A to 4C is that order illustrates the skeleton view that sheet material moves in the sheet material conveyor of Fig. 1.
Fig. 5 A1 to 5C2 illustrates the view how sheet material is bent in traditional sheet material conveyor.
Fig. 6 is illustrated in the curve map of carrying load in traditional sheet material conveyor.
Fig. 7 A1 to 7C2 illustrates the view how sheet material is bent in the sheet material conveyor of Fig. 1.
Fig. 8 is the curve map of conveying load that the sheet material conveyor of Fig. 1 is shown.
Fig. 9 is the cut-open view that comprises according to the image recording structure of the sheet material conveyor of the embodiment of the invention.
Figure 10 is the diagram external perspective view according to the printing equipment of the first embodiment of the present invention.
Figure 11 is the diagram vertical cross section that illustrates according to the illustrative arrangement of the printing equipment of the first embodiment of the present invention.
Figure 12 illustrates the structure of the rotating unit of observing along the arrow 3-3 direction among Figure 11 and the diagrammatic view of operation.
Figure 13 A to 13C illustrates the recording chart that is being transferred how to be rotated by rotating unit, then the diagram perspective drawing reverse with respect to fore-and-aft direction in the thin slice transport path.Feed status before Figure 13 A illustrates and rotates, Figure 13 B illustrates the state in the rotation, and Figure 13 C illustrates the feed status after the rotation.
Figure 14 illustrates the diagram vertical cross section that printing equipment according to the first embodiment of the present invention begins to carry out the state of first print procedure.
Figure 15 is the diagram vertical cross section that is illustrated in the printing equipment along the rotation process of the reverse recording chart of fore-and-aft direction.
Figure 16 is the diagram vertical cross section that printing equipment that Figure 14 is shown finishes the state of second print procedure.
Figure 17 illustrates the diagram vertical cross section that according to a second embodiment of the present invention printing equipment begins to carry out the state of first print procedure.
Figure 18 illustrates the diagram vertical cross section that printing equipment among Figure 17 finishes the state of first print procedure.
Figure 19 is the diagram vertical cross section that is illustrated in the printing equipment of Figure 17 along the rotation process of the reverse recording chart of fore-and-aft direction.
Figure 20 is the diagram vertical cross section that printing equipment that Fig. 8 is shown begins to carry out the state of second print procedure.
Figure 21 is the view of the traditional sheet-conveying device of explanation.
Figure 22 is the view of the traditional image recording structure of explanation.
Figure 23 A to 23C is the view of the maximum curvature of explanation in traditional image recording structure.
Figure 24 is the diagram vertical cross section of the illustrative arrangement of traditional thermal transfer type printing equipment.
Figure 25 is the diagram vertical cross section of the illustrative arrangement of traditional inkjet type printing equipment.
Figure 26 illustrates the thermal transfer type printing equipment in Figure 24 wherein has the printing equipment of thin slice feed rolls 2105 in addition along the upstream of throughput direction at record-header 2101 the diagram vertical cross section of illustrative arrangement.
Figure 27 illustrates inkjet type printing equipment wherein has the printing equipment of thin slice feed rolls 2207 in addition along the downstream of throughput direction at record-header 2202 the diagram vertical cross section of illustrative arrangement.
Embodiment
Describe embodiments of the invention in detail below with reference to accompanying drawing.
Sheet material conveyor
Fig. 1 is the skeleton view of sheet material conveyor according to an embodiment of the invention; Fig. 2 is the side view along the sheet material conveyor of Fig. 1 of the direction observation of arrow 1B; And Fig. 3 is the upward view of the sheet material conveyor of Fig. 1 of observing along the direction of arrow 1A.
In Fig. 1 to 3, sheet material conveyor has the sheet material transport path 100 that comprises smooth basically par and the bend 100a that is connected the par, and sheet material S is fed to the conveying roller of sheet material transport path 100 to 200.Sheet material transport path 100 can be along the direction leader record paper S perpendicular to the normal to a surface of recording chart S.
Conveying roller 200 is rotated by the driver element (not shown), and the surface of sheet material S is applied friction force, so that sheet material S advances along the rotation direction (the r1 direction among Fig. 2) of conveying roller 200.
In the downstream of conveying roller 200, sheet material conveyor has live-rollers to 300a, and live-rollers is to 300b.Each two surperficial clamping sheet material S that sheet material S in live- rollers 300a, 300b clamping makes it to rotate.
Live-rollers is coaxial mutually basically to 300b to 300a and live-rollers, and arranges point-blank along the Width of sheet material S.
Live- rollers 300a, 300b are rotated by the driver element (not shown), and its rotation direction can be set arbitrarily.
As shown in Figure 3, when live- rollers 300a, 300b are rotated along opposite directions (for example, live-rollers to 300a along the C1 direction, and live-rollers to 300b along the C2 direction), sheet material S is subjected to along the couple of CM direction (counterclockwise).That is to say that in other words live-rollers, applies reciprocal carrying capacity so that sheet material S is subjected to couple to sheet material S to 300a, the 300b rotating unit as sheet material S.
The producing method of couple makes the working direction that 300a and live-rollers limited 300b by live-rollers respectively perpendicular to the normal to a surface of sheet material S, and differs from one another.Rotating unit is not limited to the structure among Fig. 1 to 3, and can adopt as being disclosed in the various structures among Japanese Patent Application No.2002-234636 and the Japanese Patent Application No.9-40230 etc.According to Japanese Patent Application No.2002-234636, by utilizing grip unit clamping thin slice S on two surfaces of thin slice S, and then grip unit is rotated 90 ° of working direction that change sheet S.According to Japanese Patent Application No.9-40230, a side that forms the leading section of thin slice P broad ways at image abuts under the state of stop (against the unit), makes image form thin slice P to advance by being arranged in the deflector roll as pilot unit of opposite side that forms the leading section of thin slice P Width along image.As a result, image forms thin slice P and rotates around stop, is further rotated by cross roll then.
In addition, recording materials S can replace conveying roller to carry 200 to 300a, 300b by live-rollers, and conveying roller is to omitting.
Fig. 4 A to 4C is that order illustrates the skeleton view that moves in the sheet material conveyor of sheet material S in Fig. 1.In order to understand better, Fig. 4 A to 4C only illustrate conveying roller to 200 and live- rollers 300a, 300b in the middle of roller 200,300a and a 300b.
In Fig. 4 A, all roller 200,300a and 300b are rotatably driven, and its rotation direction is, sheet material S is advanced along thin slice transport path 100, and sheet material S is transferred until the leading section SF of sheet material S and crosses roller 300a, the 300b predetermined distance of advancing.In this stage, sheet material S no show bend 100a.
Then, shown in Fig. 4 B, roller 300b rotates along the working direction among Fig. 4 A, and roller 300a is along counter-rotating in the other direction, so that sheet material S is subjected to the couple of edge with respect to the clockwise direction (CM direction) of working direction, as described with reference to figure 3.Sheet material S rotates 90 ° by roller 300a, 300b along the CM direction, and shown in Fig. 4 A, the left end SFL of leading section SF moves forward.The position of the size of sheet material transport path 100 and roller 200,300a and 300b is set to, and makes part sheet material S introduce bend 100a with being rotated.
Then, shown in Fig. 4 C, roller 200,300a and 300b are rotatably driven along working direction, and sheet material S advances along thin slice transport path 100 in by bend 100a.
Thereby, carry load in sheet material transport path 100, to reduce, particularly at bend 100a place, and consider thickness and the width of sheet material S, the maximum curvature of bend 100a can be set to bigger than in the past.
In order to illustrate advantageous effects, the conveying load of traditional sheet material conveyor is discussed now according to present embodiment.Fig. 5 A1 to 5C2 illustrates the view that sheet material is bent in traditional sheet material conveyor, and Fig. 6 is the curve map that the conveying load of traditional sheet material conveyor is shown.
Fig. 5 A1 and 5A2 are respectively vertical view and side view, sheet material S is shown begins to be introduced into bend 1101a.Fig. 5 B1 and 5B2 are respectively vertical view and side view, sheet material S is shown enters bend 1101a.Fig. 5 C1 and 5C2 are respectively vertical view and side view, and the end that sheet material S arrives bend 1101a is shown.In Fig. 5 A1,5B1 and 5C1, hacures illustrate the scope that sheet material S enters bend 1101a.
Known, in traditional sheet material conveyor, conveying is loaded and is increased between the state of the state of Fig. 5 A1,5A2 and Fig. 5 B1,5B2, wherein sheet material S changes to case of bending from flat state, and carry load under the state of Fig. 5 C1,5C2, descend along the crooked fully back of bend 1101a at sheet material S.
In the curve map of Fig. 6, the inlet that on behalf of sheet material S, abscissa axis enter bend 1101a, and load is carried in the axis of ordinates representative.From the state-transition of Fig. 5 A1,5A2 to the process of the state of Fig. 5 C1,5C2, carry load to reach maximum (being called " maximum delivery load "), and carry load decline gradually subsequently.In Fig. 6, realize that the inlet of maximum delivery load is represented as ML.
Along with the curvature increase of bend 1101a, the maximum delivery load increases.When maximum delivery load surpasses the transport capacity of conveying roller 1102, or sheet material S is when being buckled, and sheet material S can not be transferred.So, this curvature is delivery limits " maximum curvature ".
In addition, carry the required stress of load and bent sheet S proportional.When sheet material S width is big (the curve 6-1 among Fig. 6), carry load to become greater than working as sheet material S width hour (the curve 6-2 among Fig. 6).
Will be described below the conveying load of present embodiment now.
Fig. 7 A1 to 7C2 illustrates the view that sheet material is bent in the sheet material conveyor of Fig. 1, and Fig. 8 is the curve map of conveying load that the sheet material conveyor of Fig. 1 is shown.
Fig. 7 A1 and 7A2 are respectively vertical view and side view, sheet material S is shown begins to be introduced into bend 100a.Fig. 7 B1 and 7B2 are respectively vertical view and side view, sheet material S is shown further enters bend 100a.Fig. 7 C1 and 7C2 are respectively vertical view and side view, and the end that sheet material S arrives bend 100a is shown.In Fig. 7 A1,7B1 and 7C1, hacures illustrate the scope that sheet material S enters bend 100a.
In each figure of Fig. 7 A1 to 7C2, because sheet material S progresses into bend 110a when being rotated, the breadth extreme of hacures portion increases gradually, is depicted as width A as Fig. 7 A1, is width B among Fig. 7 B1, and is width C among Fig. 7 C1.In other words, in Fig. 7 A1 and 7A2, have only the bight SC of sheet material S to enter bend 100a; In Fig. 7 B1 and 7B2, the whole width of sheet material S enters bend 100a obliquely; And in Fig. 7 C1 and 7C2, sheet material S enters bend 100a directly.Therefore, finishing to (2) the process of this rotating operation along the rotating operation of transport path to laminar recording medium from (1) beginning, rotating unit increases the part that laminar recording medium arrives bend.
Width A, B and C satisfy A＜B and A＜C, and width B is substantially equal to width C; So width A, the B of bend and C are considered to increase gradually according to this order.As a result, at the conveying load of the ML position of realizing the maximum delivery load in the past for little, thereby according to present embodiment, compare with traditional sheet feeding apparatus, the maximum delivery load reduces.
Under the situation of traditional sheet material conveyor, because sheet material S enters bend 100a under the state of leading section SF perpendicular to throughput direction, sheet material S has to be bent simultaneously on whole width.On the contrary, under the situation of present embodiment, because sheet material S enters bend 100a when the width that will be bent increases gradually.Therefore, as the situation that the thin slice of narrow width enters bend, resistance reduces.
Fig. 8 illustrates according to the maximum delivery of present embodiment and loads less than traditional device.
In addition, under situation,, carry load almost can not descend as latter half of trend under the situation of conventional apparatus at thin slice because the width that is bent is increased gradually according to the sheet material conveyor of present embodiment.Yet owing to carry load wholely to descend, maximum curvature can be set to higher value.
As mentioned above, according to the sheet material conveyor according to present embodiment, sheet material enters the bend of sheet material transport path rotationally, thereby the width that is bent is increased gradually.So the maximum delivery resistance of sheet material can be reduced, and if sheet material allow that thickness is identical, even curvature greater than the maximum curvature of conventional apparatus, sheet material also can be transferred.Therefore, can make device littler.And, a kind of sheet material conveyor can be provided, wherein, if maximum curvature is identical, the upper limit of the thickness of the sheet material that can carry can further increase.As a result, can realize the small-sized sheet material conveyor that the permissible range of sheet material wherein can broaden.
When the thickness of representing sheet material S respectively is that h, width are that b and longitudinal elastic coefficient are E, the radius-of-curvature of bend is expressed as ρ, and when carrying load meter to be shown F, carry load F basically with E,
bWith
h 3 Proportional, and be inversely proportional to ρ basically, shown in the equation described as follows (1).Equation (1) shows as sheet material S and enters bend 100a and width
bWhen increasing gradually, can control the increase of carrying load.
F∝E×(b×h
3)/ρ (1)
Image recording structure
Below, the image recording structure that comprises according to the above-mentioned sheet material conveyor of present embodiment is described with reference to the drawings.
Fig. 9 is the cut-open view that comprises according to the image recording structure of the sheet material conveyor of present embodiment.
In the sheet material conveyor of Fig. 9, the sheet material S that thin slice feed rolls 700 will be stacked on the sheet-stacking unit 400 is fed to the U-shaped transport path 100 that comprises bend 100a.Sheet material S with the U-shaped guiding, is fed to the print unit 600 as record cell that is arranged in 400 tops, sheet-stacking unit by U-shaped transport path 100 then.
After image recording, sheet material S is fed to bend 110a by distributing roller 500, and by U-shaped transport path 110 to be discharged to the discharge platform 800 that is arranged in above the print unit 600 in the U-shaped guiding.
Therefore,, use U-shaped transport path 110a usually, this sheet material conveyor feeding sheets S and the processing that makes it stand to be scheduled to simultaneously in order to change the throughput direction of sheet material S in the sheet material conveyor.
In this structure, image recording structure can make little.
Below, will be with reference to the accompanying drawing detailed description the present invention who shows according to the printing equipment of present embodiment.
Figure 10 is the diagram external perspective view of first embodiment of printing equipment, Figure 11 is the diagram vertical cross section of illustrative arrangement that this first embodiment of printing equipment is shown, and Figure 12 illustrates the structure of the rotating unit of observing along the arrow 3-3 direction among Figure 11 and the diagrammatic view of operation.
In the present embodiment, will use the heat head to describe as an example as the thermal transfer type printing equipment of record-header.
In Figure 10 and 11, Reference numeral 1 expression is as the hot head of image formation unit; Reference numeral 2, rolling roller; Reference numeral 3, ink sheet; And Reference numeral 4, the thin slice feed rolls.
The composing images heat 1 that forms the unit has the heat-generating units that comprises a plurality of heating resistors in the present embodiment, and the Width (perpendicular to the sheet surface among Figure 11) that heating resistor is continued to use the recording chart P of the medium of noting down is with the preset space length layout that is in line.Reference numeral 9 expressions are used for from the pick-up roller of thin slice storage unit feeding recording chart P.
To 4 clampings and conveying, the thin slice feed rolls is used as supply unit to 4 to recording chart P by the thin slice feed rolls, is arranged in heat 1 downstream along throughput direction.Recording chart P contacts with rolling roller 2 by the pressure that comes self-heating 1.The heater element of heat 1 is driven based on image information, the China ink of ink sheet 3 is transferred to recording chart P, to form image on recording chart P.On this occasion, when recording chart P is contacted by pressure between heat 1 and rolling roller 2, as the recording chart P tension of recording medium, carry along the direction of arrow by thin slice feed rolls 4 then.Therefore, recording chart P be heated enduringly 1 and thin slice feed rolls 4 (conveying roller) between tension force, and when recording chart P is accurately carried, print (image formation).Above-mentioned printing is identical with the conventional apparatus that reference Figure 24 describes basically.
Shown in Figure 11 and 12, present embodiment has rotating unit at record-header 1 (heat head) along the upstream of throughput direction, and this rotating unit rotates recording chart P in the thin slice transport path, with respect to the reverse recording chart P of fore-and-aft direction.Rotating unit 5 has the mobile unit that is used at two surperficial clamping recording chart P of recording chart P two positions.In other words, rotating unit 5 comprises mobile unit 5a, 5b, is arranged as along throughput direction with preset space length clamping recording chart P.Mobile unit 5a comprises and is used for making the recording chart P driven roller 6a of (moving) that advances along predetermined direction, and is used to the abutment member 7a that stops recording chart P to advance.On the other hand, another mobile unit 5b also comprises and is used for making the recording chart P driven roller 6b of (moving) that advances along predetermined direction, and is used to the abutment member 7b that stops recording chart P to advance.Driven roller 6a and driven roller 6b are adjusted to along opposite directions and rotate, to rotate recording chart P.
In the present embodiment, driven roller 6a and 6b rotate along the arrow A among Figure 12, the direction shown in the B respectively.Therefore, mobile unit 5a makes recording chart P advance in the direction of arrow A at its pressure contact site, and simultaneously, mobile unit 5b makes recording chart P advance in the direction of arrow B at its pressure contact site.As a result, in Figure 12, couple is applied on the recording chart P along the direction of arrow A and B, and recording chart P is rotated in the direction of arrow C.Then, by controlling the rotation of each driven roller 6a, 6b, recording chart P is reverse along fore-and-aft direction in the thin slice transport path.In the present embodiment, when recording chart P when throughput direction is bent, two groups of mobile unit 5a, 5b of rotating unit 5 are along the reverse recording chart P of fore-and-aft direction.
In the present embodiment, the rotating unit 5 that is adopted comprises two groups of mobile unit 5a, 5b of rotating along opposite directions; Yet, replace this structure, for example, recording chart P portion in the central is held on its two surface, its central portion (for example can be rotated then, as described in the Japanese Patent Application No.2002-234636), perhaps couple can be applied to recording chart P by the abutment member that abuts to conveying roller and recording chart P and go up (for example, as described in the Japanese Patent Application No.9-40230).
Figure 13 A to 13C illustrates the recording chart P that is being transferred to be rotated by rotating unit, then in the thin slice transport path along the reverse diagram perspective drawing of fore-and-aft direction, wherein, Figure 13 A illustrates the feed status before rotating, Figure 13 B illustrates the state in the rotation, and Figure 13 C illustrates the feed status after the rotation.
And, in Figure 13 A to 13C, before Pa is illustrated in and rotates recording chart P along the leading section of throughput direction, and Pb be illustrated in rotate before the rearward end of recording chart P.Figure 13 A illustrate recording chart P its leading section Pa by forward the guiding (at head) state under be transferred, Figure 13 B illustrates recording chart P and is rotated by rotating unit 5, and Figure 13 C illustrates recording chart P along fore-and-aft direction oppositely (rearward end Pb at head and leading section Pa in the rear end).
Figure 14 to 16 illustrates according to the illustrative arrangement of first embodiment of printing equipment of the present invention and the diagram vertical cross section of operation.Figure 14 illustrates the wherein state of first print procedure (first image forming course) beginning, and Figure 15 illustrates the rotation process with respect to the reverse recording chart of fore-and-aft direction, and Figure 16 illustrates the wherein state of second print procedure (second image forming course) end.
In first print procedure of Figure 14, be printed on the recording chart P and carry out, as shown in FIG. 13A, recording chart P is spurred and carries by thin slice feed rolls 4 under leading section Pa state in front.Yet, in first print procedure, before the leading section Pa of recording chart P arrives thin slice feed rolls 4, can not print.Therefore, in this first print procedure, may in scope V shown in Figure 14 (first area), can print, and therefore on the desired region within the scope V, print for maximum.This printing is substantially the same with the conventional procedure of describing with reference to Figure 24.
Shown in Figure 15 being used for carries out after above-mentioned first print procedure with respect to the rotation process of the reverse recording chart P of fore-and-aft direction.In this rotation process, after first print procedure has carried out printing, recording chart P at first turns back to position shown in Figure 15, rotates about 180 ° by rotating unit shown in Figure 15 5 then in rotating operation, so that reverse with respect to fore-and-aft direction.
In second print procedure of Figure 16, be printed on the recording chart P and carry out, shown in Figure 13 C, recording chart P is spurred and carries by thin slice feed rolls 4 under rearward end Pb state in front.In this case, compare with first print procedure of Figure 14, recording chart P is reverse with respect to fore-and-aft direction.So, in second print procedure of Figure 16, be printed in the scope X (second area) of the rearward end of recording chart P and carry out, in above-mentioned first print procedure, can not print thereon.Though recording chart P is reversed with respect to fore-and-aft direction, the printing in second print procedure itself is identical with the conventional procedure described in Figure 24 basically.
Figure 17 to 20 illustrates according to the illustrative arrangement of the printing equipment of second embodiment of the invention and the diagram vertical cross section of operation.Figure 17 illustrates the state that first print procedure begins, and Figure 18 illustrates the state that first print procedure finishes, and Figure 19 illustrates the rotation process that is used for respect to the reverse recording chart of fore-and-aft direction, and Figure 20 illustrates the state that second print procedure begins.
In the present embodiment, use the inkjet type printing equipment of ink jet print head with describing as the record-header example.
In Figure 17 to 20, Reference numeral 11 is expressed as the print cartridge that storage is used for the China ink of image formation; Reference numeral 12 expression is as the ink gun of image formation unit, and this ink gun comprises that be used for selectively will be from a plurality of escape holes of the China ink ejection of print cartridge 11 supplies based on image information; Reference numeral 13 expression carrying print cartridges 11 and ink gun 12 and the carriage that moves back and forth along main scanning direction; Reference numeral 14 expressions are used to guide and support the guide shaft of the carriage 13 that moves back and forth; Reference numeral 15 expressions are arranged in the thin slice feed rolls of ink gun 12 along the upstream of throughput direction, are used for feeding recordable paper P; And Reference numeral 16 expressions are used to support the platen that is fed by the recording chart P of ink gun 12.
According to present embodiment, right thin slice feed rolls 15 is disposed in the upstream of ink gun 12 along throughput direction to comprise roller, and is useful in the more upstream arrangement of thin slice feed rolls 15 and rotates recording chart P with the rotating unit 25 that it is reverse with respect to fore-and-aft direction in the thin slice transport path.Rotating unit 25 has the mobile unit of clamping recording chart P on two surfaces that are used at recording chart P two positions, identical with above-mentioned rotating unit 5 basically.In other words, rotating unit 25 comprises mobile unit 25a and 25b, and its arrangement is that recording chart P is held with preset space length along throughput direction.
Equally in the present embodiment, mobile unit 25a and 25b are driven, and driven roller 26a makes recording chart P advance along a direction at its pressure contact site, and simultaneously, driven roller 26b makes recording chart P advance along opposite direction at its pressure contact site.As a result, couple is applied to recording chart P, and recording chart P is rotated along the direction (identical with the direction of arrow C among Figure 12) of arrow C among Figure 19.Control the rotation of each driven roller 26a, 26b so that recording chart P is reverse with respect to fore-and-aft direction in the thin slice transport path.
Thereby rotating unit 25 is textural identical with rotating unit 5 among above-mentioned first embodiment basically.Reverse with respect to fore-and-aft direction at the recording chart P that leading section Pa is transferred under the state of (at head) in front, leading section Pa is in the rear end so that rearward end Pb is diverted head.
And, in the present embodiment, substitute above-mentioned rotating unit 25, for example, recording chart can be on two surface in the central portion be held, central portion can be rotated (for example, at the structure described in the Japanese Patent Application No.2002-234636) then, perhaps couple can be applied to recording chart (for example, at the structure described in the Japanese Patent Application No.9-40230) by the abutment member that abuts to conveying roller and recording chart.
Below, with reference to Figure 17 to 20, illustrate printing according to present embodiment.
Carrying out first print procedure of Figure 18 from the state of Figure 17, be printed on the recording chart P and carry out, recording chart P is carried by thin slice feed rolls 15 under leading section Pa state in front.Yet in first print procedure, after the rearward end Pb of recording chart P passed through thin slice feed rolls 15, printing can not be carried out.Therefore therefore, can not in scope Y shown in Figure 180, print, and in the desired region except scope Y of the rearward end Pb of recording chart P, print.Printing is identical with the conventional procedure described in Figure 25 basically.
After above-mentioned first print procedure, carry out rotation process shown in Figure 19.Be used for rotation process at this with respect to the reverse recording chart P of fore-and-aft direction, after first print procedure has carried out printing, recording chart P at first returns (carrying along opposite direction) to position shown in Figure 19, and in the thin slice transport path, be rotated about 180 ° then in the direction of arrow C, so that reverse with respect to fore-and-aft direction in the rotating operation of rotating unit shown in Figure 19 25.
In second print procedure of Figure 20, be printed on the recording chart P and carry out, recording chart P is reversed and is carried by thin slice feed rolls 15 under rearward end Pb state in front then.In this case, compare with 18 first print procedure with Figure 17, the front and back of recording chart P are reversed.So, in second print procedure of Figure 20, print and also can in the scope Y of the rearward end Pb of recording chart P (the leading section Pb in second print procedure), carry out, in above-mentioned first print procedure, print and can not carry out thereon.Though the front and back of recording chart P are reversed, the printing in second print procedure itself is identical with the described conventional procedure of Figure 25 basically.
According to above-mentioned each embodiment, provide: the image formation unit that on recording chart, forms image; Feeding recordable paper is by the supply unit (thin slice feed rolls 4 or 15) of image formation unit; And in transport path with respect to the rotating unit of the reverse recording chart of fore-and-aft direction.First and second print procedures that print image by order print.In first print procedure, when recording chart when the image formation unit, be printed on except not applying in the zone the scope (X or Y) of an end of recording chart of carrying capacity and carry out by supply unit; After reverse recording chart with respect to fore-and-aft direction, when recording chart when the image formation unit, second print procedure of print image carries out in the zone except the scope of the other end of the recording chart that do not applied carrying capacity by supply unit.
According to above-mentioned structure, a kind of printing equipment and Method of printing can be provided, even when the thin slice feed rolls is not arranged in the front and back of image formation unit but in the front of image formation unit or during the back, this printing equipment and Method of printing also can be printed and not produce margin on the whole surface of recording chart.
The situation that the present invention is applied to thermal transfer type printing equipment or inkjet type printing equipment has been described the foregoing description as an example.Yet, can adopt the record type of any other printing equipment, for example, sensible heat type, laser beam irradiation type or dot matrix type.Any device of the above-mentioned type can both obtain identical advantageous effects.In addition, the present invention can be applied to the string type printing equipment that writes down in by record-header main sweep recording medium, or only be applied to the line printing device that the subscan by the record-header that utilizes the whole width that covers recording medium or partial width prints, or the like.So the present invention can not consider print scanned method and use, and can realize similar advantageous effects.
In addition, the present invention can be applied to use single record-header printing equipment, be applied to use the record-header of a plurality of different color China inks the colour print device, be applied to use a plurality of record-headers to utilize same color to print but the different calibration printing equipment of color density or be applied to printing equipment in conjunction with these types.In them any one can both realize similar advantageous effects.And, not only can be applied to printing equipment individually according to printing equipment of the present invention, can also be applied to the printing equipment of compound type such as duplicating machine, facsimile recorder, shooting forms device etc.Further, it can be widely used in forming based on image information the device of image, and as the printing equipment as set composite output instrument, for example, computer system can obtain similar advantageous effects.
Though described the present invention with reference to one exemplary embodiment, it will be appreciated that to the invention is not restricted to disclosed one exemplary embodiment.The protection domain of claim will be given the most wide in range explanation, to comprise all modifications, equivalent structure and function.
Claims (11)
1. the printing equipment of a print image, it comprises:
Image formation unit, it forms described image on recording chart;
Supply unit, it carries described recording chart by described image formation unit; And
Rotating unit, it rotates described recording chart around the axis along the surface normal of described recording chart in described transport path makes described recording chart reverse with respect to fore-and-aft direction,
Wherein, described printing equipment carries out in proper order:
First print procedure, when described recording chart when the described image formation unit, the described image of printing in the zone except the scope of described recording chart one end that do not apply carrying capacity by described supply unit;
Reverse procedure, it rotates described recording chart around the axis along the surface normal of described recording chart makes described recording chart reverse with respect to fore-and-aft direction; And
Second print procedure, when described recording chart when the described image formation unit, the described image of printing in the zone except the scope of the described recording chart other end that do not apply carrying capacity by described supply unit.
2. printing equipment according to claim 1, wherein, under the state that described recording chart is bent along described throughput direction, described rotating unit rotates described recording chart around the axis along the surface normal of described recording chart makes described recording chart reverse with respect to fore-and-aft direction.
3. printing equipment according to claim 1, wherein, described rotating unit comprises: two groups of mobile units, and every group of mobile unit has driven roller and abutment member, and described driven roller contacts at two surperficial upward pressure with described recording chart with preset distance along throughput direction with abutment member; And the rotating drive unit, it rotates each described driven roller of two groups of described mobile units.
4. printing equipment according to claim 3, wherein, each described mobile unit comprises: act on described recording chart a part so that described recording chart along the progressive driven roller of predetermined party; And the abutment member that stops described recording chart to advance.
5. printing equipment according to claim 1, wherein, described rotating unit has: act on described recording chart a part so that described recording chart along progressive first mobile unit of predetermined party; And act on another part of described recording chart so that second mobile unit that described recording chart advances along the direction that is different from the described working direction that is driven by described first mobile unit.
6. printing equipment according to claim 1, wherein, described image formation unit is provided with the hot head with heat-generating units, and described heat-generating units has a plurality of heating resistors that are in line and arrange.
7. Method of printing that on recording chart, prints, its utilization:
Image formation unit, it forms image on recording chart;
Supply unit, it carries described recording chart by described image formation unit; And
Rotating unit, it rotates described recording chart around the axis along the surface normal of described recording chart in described transport path makes described recording chart reverse with respect to fore-and-aft direction,
Wherein, described Method of printing carries out in proper order:
First print procedure, when described recording chart when the described image formation unit, the described image of printing in the zone except the scope of described recording chart one end that do not apply carrying capacity by described supply unit;
Reverse procedure, it rotates described recording chart around the axis along the surface normal of described recording chart makes described recording chart reverse with respect to fore-and-aft direction; And
Second print procedure, when described recording chart when the described image formation unit, the described image of printing in the zone except the scope of the described recording chart other end that do not apply carrying capacity by described supply unit.
8. the printing equipment of a print image on the whole surface of recording chart, it comprises:
Supply unit, its feeding recordable paper;
Image formation unit, in the zone that is different from described recording chart and described supply unit position contacting, described image formation unit forms described image on the described recording chart of being carried by described supply unit; And
Rotating unit, it rotates described recording chart around the axis along the surface normal of described recording chart in described transport path makes described recording chart reverse with respect to fore-and-aft direction,
Wherein, under an end and described supply unit state of contact of described recording chart, described image formation unit prints first print procedure of described image in the first area that can be formed described image by described image formation unit;
Described rotating unit rotates described recording chart around the axis along the surface normal of described recording chart makes described recording chart reverse with respect to fore-and-aft direction; Then
Under the other end and described supply unit state of contact of described recording chart, described image formation unit prints second print procedure of described image in the second area that can be formed described image by described image formation unit.
9. printing equipment according to claim 8, wherein, described supply unit is carried described recording chart in the described recording chart of clamping.
10. printing equipment according to claim 8, wherein, described image formation unit is arranged in the upstream of described supply unit along throughput direction.
11. printing equipment according to claim 8, wherein, described rotating unit is arranged in the upstream of described image formation unit along throughput direction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004315104 | 2004-10-29 | ||
| JP2004315104A JP2006124103A (en) | 2004-10-29 | 2004-10-29 | Image recording device and sheet material carrying device |
| JP2004349554 | 2004-12-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1782898A CN1782898A (en) | 2006-06-07 |
| CN100524055C true CN100524055C (en) | 2009-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101167987A Expired - Fee Related CN100524055C (en) | 2004-10-29 | 2005-10-28 | Printing apparatus and printing method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006124103A (en) |
| CN (1) | CN100524055C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5742371B2 (en) * | 2011-03-29 | 2015-07-01 | 富士ゼロックス株式会社 | Reverse conveying apparatus, image forming apparatus, and conveying apparatus |
| JP5940139B1 (en) | 2014-12-24 | 2016-06-29 | キヤノン株式会社 | Rotating shaft, sheet conveying apparatus, and image forming apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6084624A (en) * | 1996-07-15 | 2000-07-04 | Fuji Photo Film Co., Ltd. | Color thermal recording method and color thermal printer |
| CN1463227A (en) * | 2001-06-04 | 2003-12-24 | 精工爱普生株式会社 | Printer with sheet reversal mechanism |
-
2004
- 2004-10-29 JP JP2004315104A patent/JP2006124103A/en active Pending
-
2005
- 2005-10-28 CN CNB2005101167987A patent/CN100524055C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6084624A (en) * | 1996-07-15 | 2000-07-04 | Fuji Photo Film Co., Ltd. | Color thermal recording method and color thermal printer |
| CN1463227A (en) * | 2001-06-04 | 2003-12-24 | 精工爱普生株式会社 | Printer with sheet reversal mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1782898A (en) | 2006-06-07 |
| JP2006124103A (en) | 2006-05-18 |
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