CN1173832C - Ink jet type image forming device - Google Patents

Abstract

An ink jet type image forming device, wherein auxiliary rollers (44) are disposed between pinch rollers (22) adjacent to each other coaxially with the pinch rollers (22), large diameter parts (44a) of the auxiliary rollers (44) press, from an upper side, a recording medium at those areas positioned over a platen (12), downstream side paper retaining members (46) are disposed between the auxiliary rollers (44) and an image forming area (41), and large diameter parts (46a) of the downstream side paper retaining members (46) also press the recording medium at those areas positioned over the platen (12).

Description

The recording medium supply unit

Technical field

The present invention relates to a kind of recording medium supply unit.

Background technology

As one of output device of computer or work station, the ejection ink forms the ink jet type image processing system of image on the recording medium of record-paper etc. known.With reference to Figure 33 existing ink jet type image processing system is described.

Figure 33 is the stereogram of expression as the summary formation of the plotter of an example of existing ink jet type image processing system.

Plotter 10 has record-paper (not shown) platen 12 that mounting is carried to arrow A direction (throughput direction), above this platen 12, setting up 2 piece guide rail 14a, the 14bs parallel with platen 12, by sliding bearing (not shown) balladeur train 16 is installed on these 2 guide rail 14a, 14b, this balladeur train 16 freely moves back and forth to arrow B direction (main scanning direction vertical with throughput direction) with band (not shown) by motor (not shown).In addition, guide rail 14a is fixed on the framework 15.

On balladeur train 16, carry printhead 18, on the ink ejection face (not shown) of this printhead 18, forming a plurality of ink jet exits (not shown) that spray ink.5 ink cartridge 18K, 18K (deceiving), 18C (dark green), 18M (peony), 18Y (yellow) are freely being carried in loading and unloading on printhead 18.

Printhead 18 be positioned at platen 12 above the time, the place ahead of the ink jet exit face of this printhead 18 is the image forming area that forms image.Form 1 image with official hour from ink jet exit ejection ink on the part that is positioned at image forming area in record-paper.Thereafter, after remaining on the width that adding on the keeping arm 20 send roller 22 and outlet roller 24 record-paper to be carried 1 part, it is stopped, on one side balladeur train 16 is moved back and forth on one side along arrow B direction (main scanning direction) and spray ink according to picture signal from ink jet exit, being positioned on the new part on the image forming area in record-paper forms image.By carrying out above-mentioned such action repeatedly, on record-paper, form image.The part that is forming image in the record-paper is discharged to the outside by 26 guidings of row's paper guide member.

, when forming image on record-paper, the amount that is ejected into the ink on the unit are of record-paper according to the kind of image has difference.When for example on record-paper, forming image, owing to be mainly to describe straight line or curve etc., therefore, few to the quantity of ink of the record-paper ejection of unit are.The many situations of quantity of ink that the record-paper ejection of pair unit are is also arranged in addition.With reference to Figure 34～Figure 36 the many situations of quantity of ink that such record-paper to unit are sprays are described.

Figure 34 is illustrated in the stereogram that has produced the state that rises and falls on the record-paper.Figure 35 is the ideograph that the position of the recording medium of expression printhead and come-up concerns.Figure 36 is the stereogram that the width end that is illustrated in recording medium has produced the state that rises and falls.In these figure, to the inscape mark identical symbol identical with inscape shown in Figure 33.

When for a long time, as shown in figure 34, on record-paper 30, produce and rise and fall 32 the quantity of ink of record-paper 30 ejection of unit are.As shown in figure 35, owing to rise and fall 32, on record-paper 30, produce high part 30a and low part 30b.High part 30a floats from platen 12.But platen 12 is set narrowly with the distance of above-mentioned printhead 18 in order to improve picture quality (lettering quality).Therefore, the high part 30a of record-paper 30 sprays face (head surface) 18a height than the ink of printhead 18 sometimes.At this moment, high part 30a scratching ink ejection face 18a is arranged and make dirty, the damaged danger of the raised area 30a.

In addition, above-mentioned fluctuating 32 usually the ejections in record-paper 30 lettering part 34 places of ink (having absorbed ink) produce.But rising and falling 32 also is delivered to than this lettering part 34 sometimes more to the upstream side of recording medium throughput direction.In addition, rise and fall and 32 also to be delivered to sometimes than adding and to send roller 22 more to the upstream side of recording medium throughput direction.

When more producing fluctuating 32 to recording medium throughput direction upstream side than image forming area, the part of this fluctuating 32 is transported to image forming area when this part ejection ink, and the fluctuating of fluctuating 32 is more severe, and the floatation volume of high part 30a increases.At this moment, high part 30a scratching ink sprays face 18a and has increased the danger that makes the raised area 30a dirty, damaged.In addition, as shown in figure 36, rising and falling 32 when becoming 30c highlands, width end severe, record-paper 30 and having floated, having this end 30c to be printed 18 and draw and hang and damaged danger.

In order to address the above problem, consider the amount that ink once sprays is reduced to the practical technology that no problem amount.But, owing to reduce this spray volume, and caused that the speed (print speed) that forms image on recording medium 30 is slack-off, the problem of the concentration of image (lettering concentration) step-down.

When on record-paper, forming image as described above, Yi Bian printhead 18 sprays ink and ink is arrived on (land exist) record-paper to the reciprocating motion of arrow B direction on one side with balladeur train 16.But, from the part of the ink of printhead 18 ejection before arriving record-paper during be vaporific dispersing sometimes around.The ink that disperses in this wise (mist) pollution image forms the periphery and the record-paper in zone, therefore, for the pollution that prevents that the fog belt from coming, is more disposing sheet element (not shown) to the upstream side a little of recording medium throughput direction than image forming area.This sheet element is the elongate members of extending along the arrow B direction, feeding recordable paper under this sheet element.Therefore, the zone that is covered by sheet element is not polluted by mist.

But mist is attached on the sheet element and with its surface contamination.Therefore, when user's hand or clothes etc. touched on the surface of sheet element, meetings such as this hand or clothes were made dirty by ink.

Summary of the invention

The present invention In view of the foregoing makes, and its objective is provides a kind of ink jet type image processing system that prevents by the caused fault of ink that sprays from printhead.

In order to achieve the above object, recording medium supply unit of the present invention, form the recording medium supply unit that recording medium is transported to above-mentioned image forming area of the image processing system of image on the part that is arranged in the image forming area that forms image in the recording medium of carrying along the recording medium throughput direction of regulation, it is characterized in that, comprising:

(1) driven roller is configured in the upstream side of the above-mentioned recording medium throughput direction of comparing with above-mentioned image forming area, is used for carrying recording medium along above-mentioned recording medium throughput direction;

(2) driven voller is carried recording medium with the above-mentioned recording medium throughput direction in this driven roller clamping on one side recording medium one edge;

(3) help roll, be configured to roughly coaxial with this driven voller, when can move freely along the vertical direction, be driven in the recording medium rotation that is transferred;

(4) upstream side platen member essentially coaxially is configured freely to rotate with above-mentioned driven voller;

(5) paper limiting member is configured between this upstream side platen member and the above-mentioned image forming area, along the crisscross extension that intersects with above-mentioned recording medium throughput direction.

In addition, above-mentioned recording medium supply unit has:

(6) make above-mentioned driven voller and above-mentioned driven roller connect from connect from device.

(7) above-mentionedly float the inhibition member, can connect from device with this and move linkedly.

(8) above-mentioned paper limiting member can be to implement water-proofing treatment on the part of facing with above-mentioned image forming area.

In addition, in order to achieve the above object, the second ink jet type image processing system of the present invention, have and carrying printhead that sprays ink and the reciprocating balladeur train of stipulating of main scanning direction, form image from the part ejection ink that is positioned at the image forming area that is forming image of above-mentioned printhead to the recording medium that the throughput direction along regulation is transferred, it is characterized in that, comprising:

(9) float the inhibition member, be configured in than above-mentioned image forming area, be used to suppress floating of recording medium more to the upstream side of above-mentioned throughput direction.

(10) cleaning element cleans this and floats the inhibition member.

At this, above-mentioned ink jet type image processing system comprises:

(11) driven roller is configured in than above-mentioned image forming area more to the upstream side of above-mentioned throughput direction, is used for carrying recording medium along above-mentioned throughput direction;

(12) driven voller is driven in above-mentioned driven roller and is rotated, and carries recording medium with the above-mentioned throughput direction in this driven roller clamping on one side recording medium one edge;

(13) above-mentionedly float the inhibition member, have bar-shaped paper limiting member, this paper limiting member is configured between above-mentioned driven roller and the above-mentioned image forming area, extends along the sub scanning direction with above-mentioned scanning direction approximate vertical.

In addition,

(14) above-mentioned paper limiting member can be made of the material of electrical insulating property.

Have again,

(15) above-mentioned paper limiting member has and electric charge from the polarity different of the ink of above-mentioned printhead ejection.

In addition,

(16) above-mentioned cleaning element is made of the electric conductivity material, can ground connection.

In addition,

(17) above-mentioned cleaning element can be installed on above-mentioned printhead or the balladeur train.

In addition,

(18) cleaning element can be on one side with above-mentioned float suppress member and contact on one side and freely rotate.

In addition, in order to achieve the above object, the 3rd ink jet type image processing system of the present invention, have and carrying the printhead that sprays ink and moving back and forth balladeur train at the main scanning direction of regulation, form image from the part ejection ink that is positioned at the image forming area that is forming image of above-mentioned printhead to the recording medium of carrying along the throughput direction of regulation, it is characterized in that, comprising:

(19) float restraining device, push near the part that is positioned at above-mentioned image forming area the recording medium from the top, so that it does not float;

(20) remove electric components, be fixed on above-mentioned printhead or the above-mentioned balladeur train, be stored in the above-mentioned electric charge that suppresses on the member that floats discharging foremost.

In addition; In order to achieve the above object; The 4th ink-jet image forming device of the present invention; To spray ink from carrying along the printhead on the reciprocating balladeur train of main scanning direction of regulation; The part of the image forming area in the place ahead that is positioned at above-mentioned printhead in the recording medium that the throughput direction along regulation is transferred forms the ink jet type image processing system of image; Cleaning in this ink-jet image forming device covers than above-mentioned image forming area more near the cleaning element of the sheet element the upstream side of recording medium throughput direction; It is characterized in that

(21) be fixed at least one side among above-mentioned balladeur train and the above-mentioned printhead both sides, be used to clean above-mentioned print-member.

At this,

(22) the above-mentioned relatively balladeur train of above-mentioned printhead freely loads and unloads.

(23) above-mentioned cleaning element can be fixed on this printhead.

In addition,

(24) above-mentioned cleaning element can have and is accompanied by this cleaning element and moves the clearer that is rotated along above-mentioned main scanning direction.

In addition, the 5th ink jet type image processing system of the present invention, platen with recording medium that the conveying device, mounting of carrying recording medium along the throughput direction of regulation carried by this conveying device, form image spraying ink on be positioned on this platen by the part that is positioned at the image forming area that forms image of above-mentioned conveying device in the recording medium that above-mentioned throughput direction is carried, it is characterized in that

(25) have with the recording medium in carrying by be pressed on the above-mentioned platen, be configured near the press device the above-mentioned image forming area.

At this,

(26) above-mentioned image forming area is formed on than above-mentioned conveying device more to the downstream of above-mentioned throughput direction.

(27) above-mentioned press device can with in the recording medium from whole part of more launching to the part the above-mentioned image forming area and the width vertical to the upstream side of above-mentioned throughput direction than above-mentioned conveying device with above-mentioned throughput direction by being pressed on the above-mentioned platen.

In addition,

Whether whether (28) above-mentioned press device is assembled on the above-mentioned conveying device, and can carry the state of above-mentioned recording medium to become linkedly recording medium by the state that is pressed on the above-mentioned platen with above-mentioned conveying device.

In addition,

(29) above-mentioned press device also can be made of flexual sheet material.

In addition,

(30) above-mentioned press device also can be made of the rod member that is configured between above-mentioned image forming area and the recording medium conveying device.

In addition,

(31) above-mentioned conveying device can be under the holding state before image forms beginning this recording medium to be retracted, so that the throughput direction downstream of recording medium is covered with conveying device by above-mentioned press device.

In addition,

(32) above-mentioned conveying device can be when unloading the recording medium that is positioned at the regulation position of readiness, by carrying ormal weight that its throughput direction downstream is positioned at than above-mentioned press device more to the conveying device in the downstream of above-mentioned throughput direction along above-mentioned throughput direction this recording medium.

In addition,

(33) the ink jet type image processing system has:

(33-1) the protection member of above-mentioned image forming area of covering and above-mentioned press device both sides' freely openable;

(33-2) detect the open and-shut mode of this protection member and the open-close detection apparatus that generation opens and closes detection signal;

(34) above-mentioned conveying device also can be to carry action according to the recording medium that the switching detection signal that is generated by above-mentioned open-close detection apparatus is stipulated.

Description of drawings

Fig. 1 is the stereogram of summary that expression is assembled into the plotter of recording medium supply unit.

Fig. 2 is a stereogram of representing upstream side platen member enlargedly.

Fig. 3 is the stereogram of the part of expression conveying roller.

Fig. 4 is the stereogram of expression upstream side platen member.

Fig. 5 (a) is the stereogram that the pinch roll arm of upstream side platen member has been installed in expression, (b) is the B-B profile of (a).

Fig. 6 (a) is the stereogram of expression downstream platen member, and (b) stereogram of expression retaining member (c) is the stereogram of expression pinch roll arm.

Fig. 7 is the ideograph that the expression inhibition is created in the situation of the fluctuating on the recording medium.

Fig. 8 (a) is that the expression pinch roll is being pushed the ideograph of the state of conveying roller, the stereogram of the state that (b) to be the expression pinch roll leaving from conveying roller.

Fig. 9 is the stereogram of expression as the summary of the plotter of ink jet type image processing system one example of the present invention.

Figure 10 is the stereogram of a part of conveying roller of the plotter of presentation graphs 9.

Figure 11 is a stereogram of representing 2 platen members enlargedly.

Figure 12 is the stereogram that decomposes 2 platen members of ground expression.

Figure 13 is the ideograph that the expression inhibition is created in the situation of the fluctuating on the recording medium.

Figure 14 is the stereogram that the paper limiting member of ink mist has been adhered in expression.

Figure 15 is that the side view attached to the situation of the ink mist on the paper limiting member is removed in expression.

Figure 16 is that expression replaces tabular cleaning element and the stereogram of the balladeur train of rotary cleaning element is installed.

Figure 17 is the stereogram that the printhead of tabular cleaning element is being fixed in expression.

Figure 18 is the stereogram that the printhead of revolving cleaning element is installed.

Figure 19 is the stereogram that the paper limiting member of ink mist and pinch roll etc. have been adhered in expression.

Figure 20 is that the stereogram attached to the cleaning element of the ink mist on the paper limiting member is removed in expression.

Figure 21 be pattern be illustrated on the paper limiting member side view of the situation of assembling ink mist.

Figure 22 is the stereogram that the balladeur train of one of printhead has been unloaded in expression.

Figure 23 is the side view that electric charge that pattern ground expression paper limiting member has is released in the situation on the metal workpieces of printhead.

Figure 24 is the stereogram that the summary of plotter of the 3rd embodiment of the balladeur train of expression with fixing cleaning element constitutes.

Figure 25 is the stereogram of printhead of the cleaning element of the expression example of fixing other.

Figure 26 is the stereogram that the summary of plotter of the balladeur train of fixing cleaning element of the example of expression with other constitutes.

Figure 27 is the stereogram of printhead of the cleaning element of the expression example of fixing other.

Figure 28 is the partial sectional view of the plotter of pattern ground expression the 4th embodiment.

Figure 29 is the vertical view of wanting portion of the plotter of pattern ground presentation graphs 28.

The part sectioned view of the plotter when Figure 30 is the pattern ground expression recording medium holding state of seeing from the side.

Figure 31 is the part sectioned view of the pattern ground expression seen from the side plotter when laying down (releasing) recording medium state.

Figure 32 is other the stereogram of example of expression pressing member.

Figure 33 is the stereogram that the summary of plotter of an example of the existing ink jet type image processing system of expression constitutes.

Figure 34 is illustrated in the stereogram that has produced the state that rises and falls on the record-paper.

Figure 35 is the ideograph of the position relation of expression printhead and the recording medium of floating.

Figure 36 is the stereogram that the end that is illustrated in the width of recording medium has produced the state that rises and falls.

The specific embodiment

Below, with reference to the embodiment of description of drawings ink jet type image processing system of the present invention.

First embodiment of ink jet type image processing system of the present invention is described with reference to Fig. 1～Fig. 7.

Fig. 1 is the stereogram of summary that expression is assembled into the plotter of recording medium supply unit.Fig. 2 is a stereogram of representing upstream side platen member enlargedly.Fig. 3 is the stereogram of the part of expression conveying roller.Fig. 4 is the stereogram of expression upstream side platen member.Fig. 5 (a) is the stereogram that the pinch roll arm of upstream side platen member has been installed in expression, and Fig. 5 (b) is the B-B profile of Fig. 5 (a).Fig. 6 (a) is the stereogram of expression downstream platen member, and the stereogram of Fig. 6 (b) expression retaining member, Fig. 6 (c) are the stereograms of expression pinch roll arm.Fig. 7 is the ideograph that the expression inhibition is created in the situation of the fluctuating on the recording medium.In these figure, on the inscape identical, give identical symbol with the inscape of Figure 33～shown in Figure 36.In plotter 40, recording medium on one side by conveying roller 24 (being an example of driven roller alleged among the present invention) and pinch roll 22 (being an example of driven voller alleged among the present invention) clamping on one side towards 26 conveyings of row's paper guide member.Being arranged in recording medium is clipped on the part in zone (image forming area 41) of printhead 18 and platen 12 the ejection ink and forms image.In addition, disposing make pinch roll 22 and conveying roller 24 connect from connect from member 60 (being an alleged example that connects from device among the present invention) with reference to Fig. 8.Connect from member 60 about this and to narrate afterwards.

As shown in Figure 3, conveying roller 24 is being fixed a plurality of with leaving predetermined distance mutually on rotating shaft 24a, and be configured in than image forming area 41 more to the upstream side of recording medium throughput direction, this rotating shaft 24a extends along the main scanning direction vertical with recording medium throughput direction (arrow A direction).Rotating shaft 24 is connected with carrying motor (not shown), follows the rotation of this conveying motor, and rotating shaft 24a is rotated.

On each conveying roller 24, disposing pinch roll 22 respectively.Each pinch roll 22 is fixed on the leading section that leaves a plurality of pinch roll arms 42 that predetermined distance disposing mutually with rotating freely.Between mutually adjacent pinch roll 22, disposing help roll 44 (being an example of alleged in the present invention upstream side platen member) coaxially with pinch roll 22.This help roll 44 is made of large-diameter portion 44a cylindraceous that extends along main scanning direction and the axial region 44b thinner than this large-diameter portion 44a.Large-diameter portion 44a is positioned at part on the platen 12 from push recording medium.Therefore, even cause that by being ejected in the ink of note on the medium this part desires to float, this floats also and is suppressed by large-diameter portion 44a.Shown in Fig. 5 (a), axial region 44b embeds among the 42a of bearing portion of pinch roll arm 42.

Shown in Fig. 5 (b), the 42a of bearing portion of pinch roll arm 42 be along the vertical direction (with platen 42 connect from direction) long hole shape of extending.Therefore, the axial region 44b of help roll 44 can move along the vertical direction in the inside of the 42a of bearing portion, thereby help roll 44 also can move along the vertical direction.Therefore, the recording medium that no matter transports is thick still thin can suitably push this recording medium from the top, can positively suppress it and float.

Image forming area 41 is positioned at the downstream of the recording medium throughput direction of comparing with help roll 44, is disposing downstream platen member 46 (being an example of paper limiting member alleged among the present invention) between help roll 44 and image forming area 41.Downstream platen member 46 be along main scanning direction extend cylindric.The length of this downstream platen member 46 is longer than the width of the maximum sized recording medium of spendable recording medium in plotter 40.Constitute an example of floating the inhibition member alleged among the present invention with help roll 44 and downstream platen member 46.

Shown in Fig. 6 (a), downstream platen member 46 is made of diameter big large-diameter portion 46a and the little minor diameter part 46b of diameter, with help roll 44 similarly, large-diameter portion 46a is positioned at part on the platen 12 from push recording medium.Therefore, even cause that by being ejected in ink on the recording medium this part desires to float, this floats also and is suppressed by large-diameter portion 46a.As shown in Figure 2, the length direction both ends of downstream platen member 46 are being kept by the arm member 48 that extends along the arrow A direction with rotating freely.In addition, implemented water-proofing treatment on the part of facing with image forming area 45 in downstream platen member 46 (or part of facing with platen 12).Therefore, on this part of facing, be difficult to adhere to ink, the recording medium in the conveying of can not making dirty.

Minor diameter part (axial region) 46b of downstream platen member 46 embeds among the 50a of bearing portion of the retaining member 50 shown in Fig. 6 (b).As shown in Figure 2, retaining member 50 is capped to land and is fixed on the pinch roll arm 42.Fixing about this, is that the protuberance 42b that will be formed on the pinch roll arm 42 embeds among the hole 50b that is formed on the retaining member 50.

As shown in Figure 7, when forming image, more producing fluctuating 32 than image forming area 41 sometimes to the upstream side of recording medium throughput direction to record-paper 30 ejection inks.Being created in than help roll 44 more to the fluctuating (upstream side relief part) of the upstream side of recording medium throughput direction in this fluctuating 32, pushed by this help roll 44 by under the help roll 44 time in recording medium.Therefore, suppressed to be accompanied by the floating of recording medium of upstream side relief part, than help roll 44 recording medium conveyance direction downstream side more, the upstream side relief part is transferred with the state that becomes substantially flat.

In addition, the fluctuating (downstream relief part) that produces between help roll 44 and downstream platen member 46 in the time of under recording medium is passed through downstream platen member 46, is pushed by this downstream platen member 46.Therefore, suppressed to be accompanied by the floating of recording medium of downstream relief part, than downstream platen member 46 more to the downstream of recording medium throughput direction, the upstream side relief part is transferred with the state that becomes substantially flat.Its result, the recording medium of carrying substantially flat on image forming area 41, recording medium can not contact with printhead 18 or be hung and draw.

Butt joint describes from member with reference to Fig. 8.

Fig. 8 (a) is that the expression pinch roll is being pushed the ideograph of the state of conveying roller, the stereogram of the state that (b) to be the expression pinch roll leaving from conveying roller.

Above-mentioned pinch roll arm 42 rotates for middle heart with the turning cylinder 42 that is formed on its length central portion.In addition, on the rearward end 42d of pinch roll arm 42, fixing an end of helical spring 70.Pinch roll arm 42 suppressed by helical spring 70 so that thereafter end 42d rotate to the arrow C direction.Turning cylinder 42c in pinch roll arm 42 and the middle body between the rearward end 42d slightly above disposing make pinch roll 22 and conveying roller 24 connect from connect from member 60.

Connect the block 62 and the turning cylinder 64 that is fixed on this block that have cam-like from member 60.On the length direction end of turning cylinder 64, fixing the action bars (not shown) that is fixed on the turning cylinder 64.

Therefore, by the operating operation bar, help roll 44 (with reference to Fig. 1) and downstream platen member 46 moves with connecing from the motion interlock of the member of member 60, when making pinch roll 22 push conveying roller 24 (pinch roll 22 is contacted with conveying roller 24) contact member 60 motion, help roll 44 and downstream platen member 46 move to the position of floating of pushing recording medium.In addition, connecing when member 60 moves for pinch roll 22 is moved to from the position that conveying roller 24 leaves, help roll 44 and downstream platen member 46 move to the position of floating of not pushing recording medium.

Following second embodiment that ink jet type image processing system of the present invention is described with reference to Fig. 9～Figure 13.

Fig. 9 is the stereogram of expression as the summary of the plotter of ink jet type image processing system one example of the present invention.Figure 10 is the stereogram of a part of the conveying roller of expression plotter.Figure 11 is a stereogram of representing 2 platen members enlargedly.Figure 12 is the stereogram that decomposes 2 platen members of ground expression.Figure 13 is the ideograph that the expression inhibition is created in the situation of the fluctuating on the recording medium.In these figure, on the inscape identical, give identical symbol with the inscape of Figure 33～shown in Figure 36.

In plotter 80, recording medium on one side by conveying roller 24 (being an example of driven roller alleged among the present invention) and pinch roll 22 (being an example of driven voller alleged among the present invention) clamping on one side towards 26 conveyings of row's paper guide member.Spray ink on the part that is arranged in the zone (image forming area 41) that is clipped in printhead 18 and platen 12 in the recording medium in carrying and form image.

As shown in figure 10, conveying roller 24 is being fixed a plurality of with leaving predetermined distance mutually on rotating shaft 24a, be configured in than image forming area 41 recording medium throughput direction upstream side more, this rotating shaft 24a extends along the main scanning direction vertical with throughput direction (arrow A direction).Rotating shaft 24 is connected with carrying motor (not shown), follows the rotation of this conveying motor, and rotating shaft 24 is rotated.

On each conveying roller 24, disposing pinch roll 22 respectively.Each pinch roll 22 is fixed on the leading section that leaves a plurality of pinch roll arms 42 that predetermined distance disposing mutually with rotating freely.Between adjacent mutually pinch roll 22, disposing air roll 44 coaxially with pinch roll 22.This air roll 44 is made of large-diameter portion 44a cylindraceous that extends along the direction vertical with the arrow A direction and the axial region 44b thinner than this large-diameter portion 44a.Large-diameter portion 44a is positioned at part on the platen 12 from push recording medium.Therefore, even cause that by being ejected in ink on the recording medium this part desires to float, this floats also and is suppressed by large-diameter portion 44a.As shown in figure 12, axial region 44b embeds among the 42a of bearing portion of pinch roll arm 42.

As shown in figure 12, the 42a of bearing portion of pinch roll arm 42 be along the vertical direction (with platen 12 connect from direction) long hole shape of extending.Therefore, the axial region 44b of help roll 44 can move along the vertical direction in the inside of the 42a of bearing portion, thereby help roll 44 also can move along the vertical direction.Therefore, the recording medium that no matter transports is thick still thin can suitably push this recording medium from the top, can positively suppress it and float.

Image forming area 41 is positioned at than air roll 44 conveyance direction downstream side more, is disposing paper limiting member 82 (be the present invention alleged float an example that suppresses member) so that recording medium is not floated between air roll 44 and image forming area 41.This paper limiting member 82 is the cylindric of the edge direction extension vertical with throughput direction (arrow A direction).The length of this paper limiting member 82 is longer than the width of the maximum sized recording medium of spendable recording medium in plotter 80.

As shown in figure 12, paper limiting member 82 is made of diameter big large-diameter portion 82a and the little minor diameter part 82b of diameter, with air roll 44 similarly, large-diameter portion 82a is positioned at part on the platen 12 from push recording medium.Therefore, even cause that by being ejected in ink on the recording medium this part desires to float, this floats also and is suppressed by large-diameter portion 82a.As shown in figure 11, the length direction both ends of paper limiting member 82 are being kept by the arm member 48 that extends along the arrow A direction with rotating freely.

The minor diameter part of paper limiting member 82 (axial region) 82b embeds among the 50a of bearing portion of retaining member 50 shown in Figure 12.As shown in figure 11, retaining member 50 is capped to land and is fixed on the pinch roll arm 42.Fixing about this, is that the protuberance 42b that will be formed on the pinch roll arm 42 embeds among the hole 50b that is formed on the retaining member 50.

As shown in figure 13, when forming image, more producing fluctuating 32 than image forming area 41 sometimes to the upstream side of throughput direction to record-paper 30 ejection inks.Being created in than the more fluctuating of throughput direction upstream side of air roll 44 (upstream side relief part) in this fluctuating 32 in the time of under recording medium is passed through air roll 44, pushed by this air roll 44.Therefore, suppressed to be accompanied by the floating of recording medium of upstream side relief part, than air roll 44 recording medium conveyance direction downstream side more, the upstream side relief part is transferred becoming under the state of substantially flat.

In addition, the fluctuating (downstream relief part) that produces between air roll 44 and paper limiting member 82 in the time of under recording medium is passed through paper limiting member 82, is pushed by this paper limiting member 82.Therefore, suppressed to be accompanied by the floating of recording medium of downstream relief part, than paper limiting member 82 more to the downstream of throughput direction, the upstream side relief part is transferred at the state that becomes substantially flat.Its result, the recording medium of carrying substantially flat on image forming area 41, recording medium can not contact with printhead 18 or be hung and draw.

, when using plotter 80 for a long time, on paper limiting member 82, adhere to ink mist.With reference to Figure 14 and Figure 15 this situation is described.

Figure 14 is the stereogram that the paper limiting member of ink mist has been adhered in expression.Figure 15 is that the side view attached to the situation of the ink mist on the paper limiting member is removed in expression.In these figure, on the inscape identical, give identical symbol with the inscape of Fig. 9～shown in Figure 13.

When long-time use plotter 80, become vaporificly from the ink of printhead 18 ejections, ink mist 19 is attached on the paper limiting member 82, the recording medium that contact is sometimes floated on this paper limiting member 82.At this moment, on recording medium, adhere to ink mist 19 and the recording medium of making dirty.Therefore, as Fig. 9 or shown in Figure 13, the cleaning element 60 of cleaning paper limiting member 22 is fixed on is used to remove ink mist 19 on the balladeur train 16.

Cleaning element 84 is made of sponge of easy absorption ink etc., is tabular member.It is position of sliding on paper limiting member 82 at balladeur train 16 cleaning element 84 when main scanning direction moves back and forth shown in Figure 15 that cleaning element 84 is fixed on position on the balladeur train 16.Therefore, when main scanning direction moved back and forth, cleaning element 84 was removed ink mist 19 from paper limiting member 82 at balladeur train 16.In addition, at this, cleaning element 84 is fixed on the balladeur train 16, when main scanning direction moved back and forth, cleaning element 84 cleaning paper limiting members 82 also can constitute at balladeur train 16, cleaning element 84 liftable structures, and the cleaning paper limiting member 82 as required.

With reference to Figure 16～Figure 18 other example of cleaning element is described.

Figure 16 is that expression replaces tabular cleaning element and the stereogram of the balladeur train of rotary cleaning element is installed.Figure 17 is the stereogram that the printhead of tabular cleaning element is being fixed in expression.Figure 18 is the stereogram that the printhead of revolving cleaning element is installed.

Cleaning element 86 shown in Figure 16 is installed in the bottom of balladeur train 16 and can rotates freely.This cleaning element 86 constitutes the roller shape, and clearer 86a can freely be rotated.At balladeur train 16 when main scanning direction moves back and forth, clearer 86a side polished attached to ink mist 19 (with reference to Figure 14) on the paper limiting member 82 Yi Bian be rotated.Its result, paper limiting member 82 is cleaned.In addition, clearer 86a is made of sponge of easy absorption ink etc.

Cleaning element 88 shown in Figure 17 is fixed on the bottom of printhead 18.This cleaning element 88 is made of sponge of easy absorption ink etc.In addition, printhead 18 relative balladeur trains 16 (with reference to Fig. 9) can freely load and unload.Therefore, when exchanging printhead 18, also exchange cleaning element 88 at every turn.Its result, paper limiting member 82 is positively cleaned, and ink mist 19 (with reference to Figure 14) is also positively removed.

Cleaning element 90 shown in Figure 180 is fixed on the bottom of printhead 18 and can rotates freely.This cleaning element 90 constitutes the roller shape, and clearer 90a can freely rotate.Printhead 18 with balladeur train 16 (with reference to Figure 19) when main scanning direction moves back and forth, clearer 90a side polished attached to ink mist 19 (with reference to Figure 14) on the paper limiting member 82 Yi Bian be rotated.Its result, paper limiting member 82 is cleaned.In addition, clearer 90a is made of sponge of easy absorption ink etc.In addition, printhead 18 relatively balladeur train 16 (with reference to Fig. 9) freely load and unload.Therefore, when exchanging printhead 18, also exchange cleaning element 90 at every turn.Its result, paper limiting member 82 is positively cleaned, and ink mist 19 (with reference to Figure 14) is also positively removed.

In above-mentioned example, the situation of only having adhered to ink mist 19 on paper limiting member 82 is described.But ink mist 19 also has attached to the part of the periphery of paper limiting member 82 or the situation on the member.Countermeasure for this situation describes with reference to Figure 19～Figure 23.

Figure 19 is the stereogram that the paper limiting member of ink mist and pinch roll etc. have been adhered in expression.Figure 20 is that the stereogram attached to the cleaning element of the ink mist on the paper limiting member is removed in expression.Figure 21 be pattern be illustrated on the paper limiting member side view of the situation of assembling ink mist.Figure 22 is the stereogram that the balladeur train of one of printhead has been unloaded in expression.Figure 23 is the side view that electric charge that pattern ground expression paper limiting member has is released in the situation on the metal matter part of printhead.In these figure, on the inscape identical, give identical symbol with the inscape of Fig. 9～shown in Figure 180.

When long-time use plotter 80 (with reference to Fig. 9), as shown in figure 19, the ink that sprays from printhead 18 becomes vaporific sometimes attached on paper limiting member 82, pinch roll 22, pinch roll arm 42, the air roll 44 etc.At this moment, attached to the ink mist 19 on paper limiting member 82 or the pinch roll 22 etc. attached to (print through) on the recording medium.In addition, the danger of being skidded by the recording medium that causes attached to the ink mist on the pinch roll 22 in being carried clampingly by pinch roll 22 and conveying roller 24 is arranged.Therefore, the embodiment different with the foregoing description that is used to address this problem described.In embodiments of the present invention, it is characterized in that, fixing cleaning element 92 (being an example of removing electric components alleged in the present embodiment) in the bottom of balladeur train 16 and on this cleaning element 92, giving, and making paper limiting member 82 by the material of electrical insulating property except that the electric work energy.

This cleaning element 92 is made of sponge of easy absorption ink etc., is tabular member.In addition, cleaning element 92 is connected with earth lead 94 as illustrated in fig. 20 and is grounded.This earth lead 94 is imbedded picture signal is delivered in the communication cable (long and soft) 96 of printhead 18.

When carrying recording medium, on paper limiting member 82, have positive charge 98 by the friction between paper limiting member 82 and the recording medium.Paper limiting member 82 is owing to be electrical insulating property, therefore, with the place do not fled from of electric charge, and continue accumulation on paper limiting member 82.At this, owing to have negative electrical charge from the ink of printhead 18 ejections, therefore, ink mist 19 is adsorbed on the paper limiting member 82, and is not adsorbed on pinch roll 22, pinch roll arm 42, the air roll 44 etc.Its result, ink mist 19 is almost all attached on the paper limiting member 82.Like this, attached to the ink mist on the paper limiting member 82 19 as similarly remove by cleaning element 92 wipings with shown in Figure 15.In addition, when ink had positive charge, paper limiting member 82 was selected to make it have the material of negative electrical charge.

As shown in figure 22, printhead 18 obtains image information by soft cable 99, according to this image information ejection ink.Therefore, on paper limiting member 82, assemble positive charge 98 too much and this electric charge 98 when being discharged on the metal part of printhead 18, have by this electric charge 98 error action of device is done and produce abnormal image may.But, in the present embodiment,, therefore, accumulating in electric charge 98 on the paper limiting member 82 member 92 that is cleaned and discharge at first because cleaning element 92 is grounded by earth lead 94, this electric charge is fled from by cleaning element 92 and earth lead 94.Therefore, can on paper limiting member 82, not assemble excessive positive charge 98, can not produce misoperation yet.

In the above-described embodiments, cleaning element 92 is fixed on the balladeur train 16, but also can make can lifting cleaning element 92 structure, each when cutting off the action (cutting off action) of recording medium, cleaning paper limiting member 82.In addition, though cleaning element 92 is become tabular,, also can become revolving cleaning element as shown in Figure 16.In addition, also can similarly cleaning element 92 be fixed on the bottom of printhead 18 with Figure 17 or Figure 18.At this moment, by a flexible cable (not shown) with cleaning element 90 ground connection.Like this, become cleaning element 90 rotary or can obtain effect same as described above when being fixed on the printhead 18.

With reference to Figure 24 the third embodiment of the present invention is described.

Figure 24 is the stereogram that the summary of the plotter of the balladeur train of expression with fixing cleaning element constitutes.In the figure, on the inscape identical, give identical symbol with inscape shown in Figure 33.

For the pollution that prevents to produce by mist, on plotter 100, at the sheet element 102 that is more disposing polyester matter than image forming area to the upstream side a little of above-mentioned recording medium throughput direction (arrow A direction), sheet element 102 is the elongate members of extending along the arrow B direction, feeding recordable paper under this sheet element 102.

When on record-paper, forming image,, hits on the record-paper printhead 18 Yi Bian moving back and forth to spray ink and ink is arrived with balladeur train 104 1 edge arrow B directions.From the part of printhead 18 ejection inks before arriving on the record-paper during disperse vaporificly, and attached on the adhering zone 102a of sheet element 102 (zone of representing with oblique line).Therefore, adhering zone 102a is by inkiness.

Fixing the cleaning element 106 that is used to clean above-mentioned adhering zone 102a in the bottom of balladeur train 104.This cleaning element 106, when the arrow B direction moved back and forth, side polished moved back and forth with balladeur train 104 on one side attached to the ink on the adhering zone 102a at balladeur train 104.Therefore, sheet element 102 is cleaned, the user's that can not make dirty hand or clothes etc.In addition, cleaning element 106 is made of sponge of easy absorption ink etc.In addition, also cleaning member 34 can be fixed on the printhead 18.

With reference to Figure 25 other example of cleaning element is described.

Figure 25 is the stereogram of cleaning element printhead that other example is being fixed in expression.

The cleaning element of other example is characterised in that cleaning element 110 is fixed on the point of bottom of printhead 108.Cleaning element 110 is used to clean adhering zone 102a (with reference to Figure 24).This cleaning element 110, when arrow B direction (with reference to Figure 24) moved back and forth, side polished moved back and forth with printhead 108 on one side attached to the ink on the adhering zone 102a at printhead 108.Therefore, sheet element 102 is cleaned, the user's that can not make dirty hand or clothes etc.In addition, cleaning element 110 is made of sponge of easy absorption ink etc.

In addition, printhead 108 relative balladeur trains 16 (with reference to Figure 33) can freely load and unload.Therefore, when exchanging printhead 108, also exchange cleaning element 110 at every turn, shorten during the cleaning head 110 of use.Therefore, even cleaning element 110 is little, also cleaning sheet member 102 (with reference to Figure 24) positively.

With reference to Figure 26 other example of cleaning element is described.

Figure 26 is the stereogram that the summary of plotter of the balladeur train of the cleaning element of expression with fixing this other example constitutes.In the figure, on the inscape identical, give identical symbol with inscape shown in Figure 24.

On plotter 112, for the pollution that prevents to produce by mist, at the sheet element 102 that is more disposing polyester matter than image forming area to the upstream side a little of above-mentioned recording medium throughput direction (arrow A direction), sheet element 102 is the elongate members of extending along the arrow B direction, feeding recordable paper under this sheet element 102.

When on record-paper, forming image, spray ink and make ink arrive (hitting) record-paper Yi Bian printhead 18 moves back and forth with balladeur train 114 1 edge arrow B directions.From the part of printhead 18 ejection inks before arriving on the record-paper during disperse vaporificly, and attached on the adhering zone 102a of sheet element 102 (zone of representing with oblique line).Therefore, adhering zone 102a is by inkiness.

Fixing the cleaning element 116 that is used to clean above-mentioned adhering zone 102a in the bottom of balladeur train 114.This cleaning element 116 constitutes the roller shape, and clearer 116a can freely rotate, cleaning element 116 at balladeur train 114 when the arrow B direction moves back and forth, with clearer 116a wiping attached to the ink on the adhering zone 102a.Therefore, sheet element 102 is cleaned, the user's that can not make dirty hand or clothes etc.In addition, clearer 116a is made of sponge of easy absorption ink etc.In addition, also cleaning member 54 can be fixed on the printhead 18.

With reference to Figure 27 other example of cleaning element is described.

Figure 27 is the stereogram of cleaning element printhead that other example is being fixed in expression.

The cleaning element of other example is characterised in that the point that cleaning element 120 is fixed on the bottom of printhead 118.Cleaning element 120 is used to clean adhering zone 102a (with reference to Figure 24).This cleaning element 120 constitutes the roller shape, is fixed on a pair of arm of fixing in the bottom of printhead 118 112 with rotating freely.Cleaning element 120 at balladeur train 16 when arrow B direction (with reference to Figure 33) moves back and forth, on one side side polished is rotated attached to the ink on the adhering zone 102a.Therefore, sheet element 102 is cleaned, the user's that can not make dirty hand or clothes etc.In addition, cleaning clearer 124 is made of the sponge of easy absorption ink etc.

In addition, printhead 118 relative balladeur trains 16 (with reference to Figure 33) can freely load and unload.Therefore, when exchanging printhead 118, also exchange cleaning element 120 at every turn, shorten during the cleaning element 120 of use.Therefore, even cleaning element 120 is little, also cleaning sheet member 102 (with reference to Figure 24) positively.

Below, with reference to Figure 28～Figure 31 the fourth embodiment of the present invention is described.

Figure 28 is the partial sectional view of the plotter of pattern ground expression the 4th embodiment.Figure 29 is the vertical view of wanting portion of the plotter of pattern ground presentation graphs 28.The part sectioned view of the plotter when Figure 30 is the pattern ground expression recording medium holding state of seeing from the side.Figure 31 is the part sectioned view of the pattern ground expression seen from the side plotter when laying down (releasing) recording medium state.Figure 32 is other the stereogram of example of expression pressing member.

Plotter 130 has the framework 134 of fan 132 and built-in this fan.Fixing the platen 138 of mounting recording medium 136 on the top of framework 134.The recording medium 136 that is positioned on the platen 138 is carried to arrow A direction (throughput direction).

Disposing the conveying roller 140 that is used to carry recording medium 136 in the inboard of platen 138 (downside).On conveying roller 140, a plurality of driven vollers 142 from pushing (crimping).A plurality of driven vollers 142 with the regulation spacing parallel arranging be configured on the main scanning direction (arrow B direction).Each driven voller 142 is fixed on the leading section of shaft-like roller support 144 with rotating freely.When conveying roller 140 rotations, be accompanied by this rotation, each driven voller 142 also rotates, thus, while recording medium 136 is transferred roller 140 and driven voller 142 clampings are carried to the arrow A direction.

Disposing balladeur train 160 above platen 138, this balladeur train 160 is carrying printhead 152 and is moving back and forth along main scanning direction (arrow B direction).The guide rail 162 guidings one edge arrow B direction walking that this balladeur train 160 is extended along the arrow B direction on one side.In addition, forming the ink ejection face 154 that sprays ink on below printhead 152.

Above-mentioned a plurality of roller support 144 is fixed on the supporting mass 146 by axle 148 respectively, and this supporting mass 146 is installed on the framework 134.Fixing an end of helical spring 148 as shown in figure 28 in the rearward end (upper end) of roller support 144.The other end of this helical spring 148 is fixed on the framework 134.Therefore, each roller support 144 is drawn by helical spring 148 bullets and is that middle mind-set arrow D direction is rotated with turning cylinder 144a.Thus, driven voller 142 is pressed against on the conveying roller 140.In addition, each roller support 144 with turning cylinder 144a be middle heart when rotating in the opposite direction with arrow D side, driven voller 142 leaves from conveying roller 140.

Fixing pressing tablet 150 on below roller support 144 (is an example of pressing member alleged among the present invention.) this pressing tablet 150 with recording medium 136 by being pressed on the platen 138.The approaching part (bonding portion) of turning cylinder in the pressing tablet 150 and roller support 144 140 is adhesively fixed on roller support 144 following by bonding agent etc.In addition, pressing tablet 150 is expanded to the arrow A direction from this bonding portion.

The ink that pressing tablet 150 is positioned at than printhead 152 sprays the more upstream side of arrow A direction of face 154.The place ahead of this ink ejection face 154 is the image forming area (scanning area of printhead 152) 156 that forms image.Therefore, image forming area 156 is formed on than conveying roller 140 more the downstream of arrow A direction (conveyance direction downstream side).That is, pressing tablet 150 have as shown in figure 29 from the position that disposing driven voller 142 to than image forming area 156 more to the length of arrow A direction upstream side.In addition, pressing tablet 150 in the arrow B direction, has the wide slightly width of width in the scope internal ratio recording medium 136 of platen 138.In addition, the width of so-called recording medium 136 is meant the length of arrow B direction.

The part that is disposing driven voller 142 in the pressing tablet 150 is provided with breach.Therefore, driven voller 142 directly contacts with recording medium 136.In addition, pressing tablet 150 is essentially rectangulars, is made of flexual fine sheet.

When driven voller 142 crimping conveying rollers 140, pressing tablet 150 with in the recording medium 136 from than conveying roller 140 more to the upstream side of arrow A direction to the part of image forming area 156 by being pressed on the platen 138.In addition, whole part that the broad ways of above-mentioned part and recording medium 136 is launched is by being pressed on the platen 138.At this moment, near pressing tablet 150 deflection and contacting closely driven voller 140 with recording medium 136.

On roller support 144, connecting be used for driven voller 142 from conveying roller 140 connect from action bars (not shown).The user is crimped on driven voller 142 on the conveying roller 140 or with driven voller 142 and leaves from conveying roller 140 by operating this action bars.With connecing of such driven voller 142 from side by side, make pressing tablet 150 be positioned on the platen 138 recording medium 136 connect from.Be whether whether pressing tablet 150 can carry the state of recording medium 136 to become linkedly recording medium by the state that is pressed on the platen 138 with driven voller 142 and conveying roller 140.

The power (elastic force of helical spring 148) that pressing tablet 150 is pushed recording medium 136 is set at recording medium 136 successfully is transported on the platen 138 can not bring the power of any bad influence to this conveying.

When forming image by above-mentioned plotter 130 on recording medium 136, the ink ejection face 154 from printhead 152 sprays the volume inks to recording medium 136 sometimes.At this moment, owing in fiber portion that forms recording medium 136 and non-fiber portion, absorbed the ink of volume, produce fluctuating at as shown in Figure 29 image section (having formed the part of image) 136a last generations differential expansion and be out of shape.But even under these circumstances, recording medium 136 also can be crimped on the platen 138 by pressing tablet 150 and be retained as plane.Therefore, recording medium 136 not can ink spray face 154 near float.Therefore, recording medium 136 does not contact with ink ejection face 154 and forms preferable image.

In addition, that recording medium 136 is clipped the upstream side of driven voller 142 on the arrow A direction by the scope on the platen 138 of being pressed in is continuous to the downstream for pressing tablet 150.Therefore, the recording mediums such as crimp force 136 by a plurality of driven vollers 142 can loosely not be transferred.Therefore, by the rotation of fan 132, the whole width regions of recording medium 136 stably is attracted on the platen 138 and is transferred.

As mentioned above, forming that record images medium 136 can contacts with the ink of printhead 152 ejection face 154 yet and by scratching, its result prevents to be drawn by ink ejection face 154 by the variation of the caused image of this scratching and recording medium 136 and hangs and produce breakage.

In addition, the material of pressing tablet 150 does not need specific so long as the little material of coefficient of friction gets final product.When making pressing tablet 150 with the little material of coefficient of friction, the surface of recording medium 136 can not drawn to hang or produce wearing and tearing, is suitable therefore.

After the formation image finishes on the recording medium 136, cut off recording mediums 136, after this cuts off, become image and form the preceding holding state of beginning by cutting knife shown in Figure 28 158.In this holding state, conveying roller 140 is reversed by control device (not shown).Thus, recording medium 136 quilts are to retracting ormal weight in the opposite direction with arrow A side.

By making conveying roller 140 counter-rotatings in this wise, retract when it being stopped after the recording medium 136, as shown in figure 30, the throughput direction downstream 136b of recording medium 136 be positioned at than the downstream of pressing tablet 150 more to the upstream side of arrow A direction and than driven voller 142 more to the downstream of arrow A direction.Therefore, be pressed sheet 150 of the throughput direction downstream 136b of recording medium 136 covers.

As mentioned above, when throughput direction downstream 136b is pressed sheet 150 coverings, even the part of this covering also is difficult to be subjected to the influence of humidity under the environment of high humility.In addition, even the part moisture absorption of this covering, this part is not owing to floated by being pressed on the platen 138 by pressing tablet 150 yet.Therefore, even recording medium 136 is placed under the high humidity environment, also can prevent to float the recording medium 136 scratching inks ejection face 154 that makes by it.

As shown in figure 30, when the throughput direction downstream 136b of recording medium 136 is pressed sheet 150 coverings, when conveying roller 140 has left,, there is recording medium 136 to drop to the danger of rear side (arrow A direction upstream side) at driven voller 142 because recording medium 136 is not held.Countermeasure about preventing that this from falling describes with reference to Figure 31.

The protective cover 170 (being an example of the alleged protection member of the present invention) that covers pressing tablet 150 and image forming area 156 in plotter 130 is configured in the top of platen 138.The axle 170a that this protective cover 170 can extend along arrow B direction (direction perpendicular to paper of Figure 31) is the center freely openable.

In addition, disposing optical sensor 172 (being an example of open-close detection apparatus alleged among the present invention) above platen 138, this optical sensor 172 is used to detect over cap 170 and is opening or closing.In optical sensor 172, when over cap 170 is being opened, produce 0 volt switching detection signal, in addition, when over cap 170 is being closed, generate 5 volts switching detection signal.

According to the switching detection signal that generates by optical sensor 172, controller (not shown) control conveying roller 140, thus, and conveying roller 140 rotation ormal weights, the recording medium of stipulating is carried action.

Below the recording medium of this regulation of explanation is carried an example of action.

When on recording medium 136, forming image, conveying roller 140 and driven voller 142 clamping recording mediums 136 (recording medium 136 is installed), an edge arrow A direction carry recording medium 136 to form image from ink ejection face 154 (with reference to Figure 28) to recording medium 136 ejection inks on one side.

After recording medium 136 has been installed, the user finds for example to have installed the recording medium 136 of wrong size sometimes, and at this moment, in order to take out the recording medium 136 of having installed, the user opens over cap 170.When over cap 170 was opened, optical sensor 172 detected this state of having opened, and generated 0 volt switching detection signal in optical sensor 172.

At this, when generating 0 volt switching detection signal in optical sensor 172, discharge tray 140 is just transferring recording medium 136 is carried predetermined distance to the arrow A direction.This predetermined distance is that the throughput direction downstream 136b of recording medium 136 arrives the distance of discharging guide member 174.

Like this, when the throughput direction downstream 136b of recording medium 136 has arrived discharge guide member 174, even driven voller 142 is left from conveying roller 140, recording medium 136 does not drop to rear side (arrow A direction upstream side) yet and therefore, unloads recording medium 136 easily.

In above-mentioned example, as recording medium 136 has been used pressing tablet 150 by the member that is pressed on the platen 138, but it is shown in Figure 32 by pressure bar 180 also can to replace this pressing tablet 150 to use.

By pressure bar 180 are the rod member of extending along arrow B direction (width of recording medium).Should be fixed on the leading section of roller support 144 by pressure bar 180 with rotating freely.By pressure bar 180 be configured near the of image forming area 156 and than this image forming area more a little to the upstream side of throughput direction.

Leading section at roller support 144 is forming the hole of inserting by pressure bar 180, can easily roller bearing 144 be installed (can insert) in the hole by the size that strengthens this hole.In addition, when having strengthened the size in hole, also can have clearance ground by pressure bar 180 and press volt recording medium 136.

Utilizability on the industry

In first ink-jet image forming device of the present invention described above, forming the district than image Even the territory more in the upstream side of recording medium throughput direction recording medium want to float also to have to float and press down Member processed suppresses this and floats. Therefore, prevent recording medium and the top that is positioned at image forming area Printhead contacts or draws extension, prevents the damage of recording medium or printhead.

At this, float the inhibition member and have upstream side platen member and paper limiting member, this upstream side pressure Paper member and driven voller are disposing with roughly rotating freely coaxially, and this paper limiting member is configured in this Between upstream side platen member and the above-mentioned image forming area, and edge and above-mentioned recording medium conveying side To the crisscross extension that intersects, at this moment, can be more with upstream side pressure paper member and paper limiting member Positively suppress floating of recording medium.

In addition, have make above-mentioned driven voller from above-mentioned driven roller connect from connect from device, above-mentioned float press down Device processed and this connect motion from device when moving linkedly, when having produced plug paper etc., by Also leave from recording medium in driven voller can be floated the inhibition member when driven roller leaves, Therefore, plug paper can be easily removed, recording medium supply unit easy to use can be obtained.

In addition, above-mentioned paper limiting member is to implement to prevent in the face of the part of above-mentioned image forming area During water treatment, because the part in the face of image forming area in the paper limiting member is difficult to adhere to Ink, therefore, the recording medium in the conveying of can not making dirty.

In addition, in second ink-jet image forming device of the present invention, sometimes spray from printhead Ink becomes vaporific and is attached to float and suppresses on the member. In addition, recording medium is floated sometimes with floating Rise and suppress the member contact. At this moment, have to be attached to and float the ink that suppresses on the member and be attached to the record matchmaker The danger of body. But, because the cleaning element cleaning is floated the inhibition member and is removed from floating the inhibition member Remove ink, therefore, even recording medium suppresses member and contacts also not attached on recording medium with floating Ink. Therefore, can prevent by the ink recording medium of making dirty. In addition, owing to float the inhibition member Suppress floating of recording medium, therefore, recording medium does not contact with printhead, therefore, does not have Disorderly and make image variation or showing by recording medium damage printhead from the ink of printhead ejection Resemble.

At this, have driven roller and driven voller, this driven roller is configured in than above-mentioned image forming area more Above-mentioned throughput direction upstream side is used for carrying recording medium along above-mentioned throughput direction, this driven voller with This driven roller together above-mentioned throughput direction in the recording medium of clamping on one side one edge is carried recording medium, and Being driven in above-mentioned driven roller is rotated. Above-mentioned float suppress member have along and above-mentioned scanning direction The bar-shaped paper limiting member that the sub scanning direction of approximate vertical extends, this paper limiting member is configured in Between above-mentioned driven roller and the above-mentioned image forming area, at this moment, because driven roller and driven voller are on one side The above-mentioned throughput direction in clamping recording medium one edge is carried recording medium, therefore, and can be more certain Recording medium is carried on ground. In addition, float the inhibition member by bar-shaped paper limiting member structure owing to above-mentioned Become, therefore, simple structure.

In addition, when above-mentioned paper limiting member is made of the material of electrical insulating property, limit at paper in recording medium Slide when having produced electric charge on the member processed, because the paper limiting member is electrical insulating property, at paper restriction structure Store electric charge on the part, the polarity of the electric charge of the mist that is at this moment generated by the ink from printhead ejection because Opposite with the polarity of electric charge on being stored in the paper limiting member, therefore, mist is limited by paper by electrostatic force The member preferential adsorption.

Therefore, mist by the absorption of the member beyond the paper limiting member, is adsorbed on the paper limiting member hardly Mist removed by cleaning element. Its result, almost all being adsorbed by the paper limiting member of mist and by clear Clean member is removed, can prevent other member and part on adhere to mist.

In addition, at above-mentioned paper limiting member with different from polarity from the ink of above-mentioned printhead ejection The electric charge of polarity the time, the mist of ink since static be attracted on the paper limiting member. Therefore, this The time, mist can not disperse towards periphery, and easily the concentrated area is removed and is attached on the paper limiting member The mist of ink.

In addition, above-mentioned cleaning element is made of the material of electric conductivity, when being grounded, at cleaning element On do not store electric charge. Therefore, can prevent by the caused mistake of electric charge that is stored on the cleaning element Action.

In addition, when above-mentioned cleaning element is mounted on above-mentioned printhead or the above-mentioned balladeur train, printhead or Balladeur train is owing to can exchange at ordinary times, and therefore, cleaning element is also exchanged in the identical time. Cause This can more positively remove ink mist from floating the inhibition member.

In addition, Yi Bian above-mentioned cleaning element be on one side with above-mentioned float suppress member and contact freely During the row rotating member, be attached to the cleaned member of ink mist that floats on the inhibition member and more positively remove Go.

In addition, in the 3rd ink-jet image forming device of the present invention, recording medium quilt on one side sometimes Carry one side scratching to float the inhibition member. At this moment, suppress to produce between member and the recording medium floating Give birth to static, suppress member and store electric charge floating. When the amount of this electric charge becomes when a certain amount of storage The electric charge of depositing is discharged. When electric charge for example is printed the metal partial discharge of head, has by electric charge and put The ink-jet image forming device misoperation that electricity causes and the danger that produces abnormal image. But, by Float the electric charge that suppresses on the member in removing except electric components to be stored in, therefore, can not be printed head or The discharges such as hardware of periphery. Can prevent misoperation and abnormal image. Above-mentioned except electric components by Make earlier to be stored in the above-mentioned charge discharge that suppresses on the member that floats, therefore, removed electric components to put at first Electricity. Therefore, can more really be printed the discharges such as hardware of head or periphery, can be more Really prevent misoperation and abnormal image. In addition, above-mentioned except electric components since be fixed on above-mentioned On printhead or the above-mentioned balladeur train, therefore, the reciprocating motion that can be accompanied by printhead or balladeur train is carried out Except electricity, can obtain simply constructed except electric components.

In addition, in the 4th ink-jet image forming device of the present invention, because cleaning element is accompanied by Therefore the reciprocating motion cleaning foil member of printhead or balladeur train, carries out at each balladeur train or printhead During reciprocating motion, sheet element is positively cleaned. Can do not polluted by sheet element user's hand or clothing Clothes.

At this, above-mentioned printhead is the form that relatively above-mentioned balladeur train freely loads and unloads. At above-mentioned cleaning element When being fixed on this printhead, when each exchange printhead, also exchange cleaning element, therefore, make With shortening during the cleaning element. Therefore, even cleaning element is small-sized, also can be certain Ground cleaning sheet member.

When above-mentioned cleaning element is to have to be accompanied by to move to above-mentioned main scanning direction to turn round The cleaning element of clearer the time, the frictional resistance that produces between cleaning element and the sheet element reduces. Thus, can reduce the impact of the vibration etc. of the movement that is accompanied by cleaning element.

In addition, because clearer is rotated, the contact area of clearer and sheet element is increased. Cause This, the clean-up performance of cleaning element improves.

In addition, in the 5th ink-jet image forming device of the present invention, because press device is with record Medium are by being pressed on the platen, and recording medium does not contact and do not produce scratching with printhead. Therefore, can To prevent recording medium breakage or image lesion. Therefore, can obtain Reliability Enhancement ink-jet The formula image processing system.

At this, image forming area is formed in than above-mentioned conveying device more lower to above-mentioned throughput direction The trip side, above-mentioned press device with in the recording medium from than the more above-mentioned throughput direction of above-mentioned conveying device Upstream side is to the part of above-mentioned image forming area and width that will be vertical with above-mentioned throughput direction Whole part of launching can more positively be prevented by press device when being pressed on the above-mentioned platen End floating of recording medium.

In addition, above-mentioned press device is assembled in the above-mentioned conveying device, and, with above-mentioned conveying device Whether can carry the state of above-mentioned recording medium whether to become linkedly above-mentioned recording medium by being pressed in During state on the above-mentioned platen, because operation note medium easily, so obtain the user Just ink-jet image forming device.

In addition, above-mentioned press device is when being made of the pliability sheet material, can obtain simply constructed pressing Device.

In addition, above-mentioned press device is to carry dress by being configured in above-mentioned image forming area and recording medium When the rod member between putting consists of, can obtain simply constructed press device.

In addition, above-mentioned conveying device is in the holding state before image forms beginning recording medium to be drawn Return so that the conveying device that the downstream of the throughput direction of this recording medium is covered by above-mentioned press device The time, even under the state that recording medium is installed under the environment of high humility, place recording medium Also be difficult to moisture absorption, therefore can more positively prevent floating of recording medium.

In addition, above-mentioned conveying device is to pass through when unloading the recording medium of the position of readiness that is positioned at regulation Recording medium is carried ormal weight and its conveyance direction downstream side is positioned at than upper to above-mentioned throughput direction When stating press device more to the conveying device of above-mentioned throughput direction downstream, can not make recording medium from Device body falls, can be easily and positively unload recording medium and install.

In addition, ink-jet image forming device is to have switching and protect freely member and this switching inspection Survey device, this protection member is used for covering above-mentioned image forming area and above-mentioned press device both sides, The open and-shut mode that this open-close detection apparatus detects this protection member generates the switching detection signal. Above-mentioned defeated The record matchmaker who send device to stipulate according to the switching detection signal that is generated by above-mentioned open-close detection apparatus When body is carried the ink-jet image forming device of action, can unload more easily recording medium.

Claims (23)

1. recording medium supply unit, it is the recording medium supply unit that recording medium is transported to above-mentioned image forming area that forms the image processing system of image on the part that is arranged in the image forming area that forms image in the recording medium of carrying along the recording medium throughput direction of regulation, it is characterized in that, comprising:

Driven roller is configured in the upstream side of the above-mentioned recording medium throughput direction of comparing with above-mentioned image forming area, is used for carrying recording medium along above-mentioned recording medium throughput direction;

Driven voller is carried recording medium with the above-mentioned recording medium throughput direction in this driven roller clamping on one side recording medium one edge;

Help roll, be configured to roughly coaxial with this driven voller, when can move freely along the vertical direction, be driven in the recording medium rotation that is transferred.

2. recording medium supply unit as claimed in claim 1, it is characterized in that, floating of recording medium after paper limiting member with the top that is configured in the platen between above-mentioned help roll and the above-mentioned image forming area, this paper limiting member form along crisscross extension, the limited images of intersecting with the recording medium throughput direction.

3. recording medium supply unit as claimed in claim 1, it is characterized in that, have make above-mentioned driven voller from above-mentioned driven roller connect from connect from device, at least one side of above-mentioned help roll or above-mentioned paper limiting member and this connect from the device action move linkedly;

Above-mentioned driven voller is when the above-mentioned driven roller of pushing, and at least one orientation of above-mentioned help roll or above-mentioned paper limiting member is in the position of floating of pushing recording medium;

When above-mentioned driven voller separated from above-mentioned driven roller, at least one orientation of above-mentioned help roll or above-mentioned paper limiting member was in the position of floating of not pushing recording medium.

4. recording medium supply unit as claimed in claim 2, it is characterized in that, have make above-mentioned driven voller from above-mentioned driven roller connect from connect from device, at least one side of above-mentioned help roll or above-mentioned paper limiting member and this connect from the device action move linkedly;

Above-mentioned driven voller is when the above-mentioned driven roller of pushing, and at least one orientation of above-mentioned help roll or above-mentioned paper limiting member is in the position of floating of pushing recording medium;

When above-mentioned driven voller separated from above-mentioned driven roller, at least one orientation of above-mentioned help roll or above-mentioned paper limiting member was in the position of floating of not pushing recording medium.

5. recording medium supply unit as claimed in claim 2 is characterized in that, above-mentioned paper limiting member is being implemented water-proofing treatment in the face of on the part of above-mentioned image forming area.

6. recording medium supply unit as claimed in claim 3 is characterized in that, above-mentioned paper limiting member is being implemented water-proofing treatment in the face of on the part of above-mentioned image forming area.

7. recording medium supply unit as claimed in claim 4 is characterized in that, above-mentioned paper limiting member is being implemented water-proofing treatment in the face of on the part of above-mentioned image forming area.

8. recording medium supply unit as claimed in claim 2 is characterized in that, has the cleaning element that at least one side to above-mentioned help roll or above-mentioned paper limiting member cleans.

9. recording medium supply unit as claimed in claim 3 is characterized in that, has the cleaning element that at least one side to above-mentioned help roll or above-mentioned paper limiting member cleans.

10. recording medium supply unit as claimed in claim 4 is characterized in that, has the cleaning element that at least one side to above-mentioned help roll or above-mentioned paper limiting member cleans.

11. recording medium supply unit as claimed in claim 5 is characterized in that, has the cleaning element that at least one side to above-mentioned help roll or above-mentioned paper limiting member cleans.

12. recording medium supply unit as claimed in claim 6 is characterized in that, has the cleaning element that at least one side to above-mentioned help roll or above-mentioned paper limiting member cleans.

13. recording medium supply unit as claimed in claim 7 is characterized in that, has the cleaning element that at least one side to above-mentioned help roll or above-mentioned paper limiting member cleans.

14. recording medium supply unit as claimed in claim 8 is characterized in that, above-mentioned paper limiting member is made of the material of electrical insulating property.

15. recording medium supply unit as claimed in claim 9 is characterized in that, above-mentioned paper limiting member is made of the material of electrical insulating property.

16. recording medium supply unit as claimed in claim 10 is characterized in that, above-mentioned paper limiting member is made of the material of electrical insulating property.

17. recording medium supply unit as claimed in claim 11 is characterized in that, above-mentioned paper limiting member is made of the material of electrical insulating property.

18. recording medium supply unit as claimed in claim 12 is characterized in that, above-mentioned paper limiting member is made of the material of electrical insulating property.

19. recording medium supply unit as claimed in claim 13 is characterized in that, above-mentioned paper limiting member is made of the material of electrical insulating property.

20., it is characterized in that above-mentioned paper limiting member has the electric charge of the ink polarity different that sprays with above-mentioned printhead as each described recording medium supply unit in the claim 8 to 19.

21., it is characterized in that above-mentioned cleaning element is made of the electric conductivity material and is grounded as each described recording medium supply unit in the claim 8 to 19.

22., it is characterized in that above-mentioned cleaning element is installed on above-mentioned printhead or the balladeur train as each described recording medium supply unit in the claim 8 to 19.

23. as each described recording medium supply unit in the claim 8 to 19, it is characterized in that, Yi Bian above-mentioned cleaning element contacts rotation freely on one side with at least one side of above-mentioned help roll or above-mentioned paper limiting member.

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