CN101620390B - Image forming apparatus and image forming method - Google Patents
Image forming apparatus and image forming method Download PDFInfo
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- CN101620390B CN101620390B CN2009101396984A CN200910139698A CN101620390B CN 101620390 B CN101620390 B CN 101620390B CN 2009101396984 A CN2009101396984 A CN 2009101396984A CN 200910139698 A CN200910139698 A CN 200910139698A CN 101620390 B CN101620390 B CN 101620390B
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Abstract
The invention relates to an image forming apparatus with a further inexpensive structure, capable of preventing image failures due to water droplets of dew condensation water droplets even in double-side printing just after single-side mass printing, while attaining reduction in size of the apparatus and without newly providing a different structure responding to water droplets. The image formingapparatus includes: a transfer part; a fixing part 14; a sheet discharge part 25; and a double-side carrying path 30. The apparatus is further provided with: a plurality of guide plates 70, 71 and 75disposed above the fixing part 14; a cavity part 67 provided above the fixing part 14 to be closer to the fixing part 14; and an air flow generation means (the fixing part 14, a louver part 77, etc.)generating an air flow A directed to the cavity part 67.
Description
Technical field
The present invention relates to duplicating machine, facsimile recorder, printer, draught machine, and the image forming apparatus that comprises the compounding machine etc. of plural function wherein, specifically be about can in the two sides of sheet material, carrying out the image forming apparatus that image forms.
Background technology
In the transfer paper heating back photographic fixing with the toner picture by transfer printing there being not photographic fixing, in the image forming apparatus of the photographic fixing portion of hot photographic fixing mode, when the photographic fixing of photographic fixing portion, cause the device interior dewfall for the evaporation because of the moisture that is included in transfer paper inside, motion has multiple countermeasure (referring to Patent Document 1-3).
With reference to Figure 10 and Figure 11 image forming apparatus example in the conventional art is described, with the problem that is used for chatting after clear and definite.Also have, in Figure 10 and Figure 11 shown in the thin portion of image forming apparatus constitute, employing be the part (Fig. 1-Fig. 4 that afterwards chats is as the same) that can realize device miniaturization and the low-cost novel image forming apparatus that constitutes.Shown in Figure 10 is sectional drawing around photographic fixing portion, single face conveyance path and the conveyance path, two sides, and shown in Figure 11 is side view around photographic fixing portion, single face conveyance path and the conveyance path, two sides after protecgulum 27 shown in Figure 1 and sheet feed section shown in Figure 4 20 are taken off.
In the photographic fixing portion 14 of Figure 10 as the photographic fixing assembly, for come with high temperature, high pressure photographic fixing arrive transfer paper etc. with in the paper S, when built-in temperature begins to start from hanging down state, because of the water vapour that takes place with the moisture in the paper S, will in each guide plate that forms, constitutes each conveyance path shown in this figure (single face conveyance path 35, conveyance path, two sides 30 etc.), produce dewfall.
No matter single face conveyance shown in Figure 10 path 35 is printed on one side or two-face printing, it all is the path of passing through with paper S, because the intensification of the conveyance guide plate that causes with paper S that is heated by high temperature in photographic fixing portion 14, and take moisture 2 reasons such as out of body is outer with paper S, make that the water droplet adhesion amount at this place is less.
In addition, patent documentation 4 also motion a kind of image forming apparatus, promptly be positioned at photographic fixing portion roughly directly in, be provided with and comprise and between this guiding parts and outer mounting cover cover, be formed with blank part by the outer mounting cover cover that constitutes the guiding parts in conveyance path, two sides with photographic fixing portion together.
Patent documentation 1: specially permit communique No. 3121133
Patent documentation 2: the spy opens the 2006-276215 communique
Patent documentation 3: the spy opens the 2005-257853 communique
Patent documentation 4: the spy opens the 2006-322994 communique
Summary of the invention
But, in the dewfall countermeasure of patent documentation 1-3, because all be corresponding water droplet and be provided with new formation in addition, so do not reach device miniaturization and problem cheaply with regard to existing.
On the one hand, 30 li in conveyance path, the two sides of above-mentioned Figure 10, be printed on one side (one-sided image formation) logical paper carries out manyly more, and water droplet is just easy of more each guide plate that constitutes conveyance path, two sides 30 (in the photographic fixing guide plate 70 etc.) lining.When a large amount of two-face printings that is printed on one side afterwards initial, particularly the water droplet on the conveyance path, two sides 30 that so far accumulates can be attached in the transfer paper, when (two sides) image forms next time, can cause that transfer printing is bad in transfer printing portion (shown in Figure 22 transfer rolls 12 configuration portions), thereby the unusual of image takes place.
Though dewfall is the easiest generation after photographic fixing, particularly in equipment with vertical direction conveyance path, miniaturization along with equipment, be provided with and comprise that the formation that is used for the conveyance path, two sides of the difference portion of two-face printing after the photographic fixing is more, for the disadvantageous condition that just more forms of adhering to of dewfall.
Adhere to for this water droplet, though be to come correspondence by append hole shape in each guide plate conveyance face to reduce the water droplet attachment surface in the prior art, the water droplet to conveyance path, two sides guide plate that can not eliminate fully in being printed on one side adheres to.Also have, adhere to countermeasure as same water droplet, in the device that is provided with gutter channel (duct) parts etc., because being set, the space is difficult to guarantee that (to the restriction of device miniaturization), parts are counted increases and cause reason such as cost rising, so in equipment in the past, be in the state that is difficult to carry out.
Also have, in the dewfall countermeasure of passing through blank part that patent documentation 4 is put down in writing,, look it is the formation that just can reach with low cost simply because increase other formations that are provided with corresponding to water droplet.But, because blank part is formed in the top in conveyance path, two sides, still may dewfall after the water vapour that is produced by photographic fixing portion arrives blank part through conveyance path, two sides.Therefore, before water vapour arrives the blank part dewfall, dewfall inside the conveyance guide plate that constitutes conveyance path, two sides etc. just, after the water droplet of this accumulation is attached in the transfer paper, will when form, next two sides image cause that in transfer printing portion transfer printing is bad, thereby may produce abnormal image.
So, the present invention puts and present situation in view of the above problems, purpose is to provide a kind of new formation that is not provided with in addition corresponding to water droplet, when realizing device miniaturization, even during the two-face printing after being printed on one side in a large number, also can prevent the generation of the abnormal image that the water droplet because of dewfall causes, thereby realize the low-cost image forming apparatus that constitutes.
In order to realize that when addressing the above problem above-mentioned purpose, the present invention have adopted following technical scheme.
1. image forming apparatus, it comprises:
Transfer printing portion, it transfers images on the sheet material;
Photographic fixing portion, it is configured in the downstream of described transfer printing portion of sheet material conveyance direction, described photographic fixing portion by heating with described image fixing in described sheet material, and the sheet material conveyance after the photographic fixing gone in the downstream of described image forming apparatus;
Discharge portion, it is configured in the downstream of described photographic fixing portion of described sheet material conveyance direction, and described discharge portion is discharged to described sheet material the outside of described image forming apparatus;
The guiding parts of plural number, it is positioned at described photographic fixing portion top, formed sheet material conveyance path, described sheet material conveyance path comprises sheet material single face conveyance path and conveyance path, sheet material two sides, it is characterized in that, described sheet material single face conveyance path and conveyance path, sheet material two sides comprise the blank part that the guiding parts by described plural number constitutes, the air-flow that produces when forming by image.
2. according to technical scheme 1 described image forming apparatus, it is characterized in that:
Described air-flow comprises the steam that the heating part of described photographic fixing portion produces.
3. according to technical scheme 2 described image forming apparatus, it is characterized in that:
Described blank part makes the air communication mistake in the direction that is basically perpendicular to sheet material conveyance direction.
4. according to technical scheme 3 described image forming apparatus, it is characterized in that comprising:
Be provided with electric component at an interior side cover cap, comprise the direction of the described air-flow of described steam, with to be provided with described electric component opposite in the direction of an interior described side cover cap.
5. according to technical scheme 1 described image forming apparatus, it is characterized in that comprising:
The side cover cap, it is in the direction of both ends of extending along described photographic fixing minister degree direction, and is perpendicular with described photographic fixing minister degree direction,
All be provided with the opening of plural number in each described side cover cap, described air communication is crossed the described opening of described side cover cap.
6. according to technical scheme 1 described image forming apparatus, it is characterized in that comprising:
The side cover cap, it is in the direction of both ends of extending along described photographic fixing minister degree direction, and is perpendicular with described photographic fixing minister degree direction,
All be provided with the opening of plural number in each described side cover cap, the described airflow direction that is produced by forced draft is basically parallel to the described length direction of described photographic fixing portion.
7. according to technical scheme 1 described image forming apparatus, it is characterized in that:
The guiding parts of at least one described plural number comprises the moisture absorption parts, to absorb and to store in the described blank part drop that steam was condensed that is produced by described photographic fixing portion.
8. according to technical scheme 1 described image forming apparatus, it is characterized in that:
One in the guiding parts of the described plural number of described blank part comprises the collection part, with collect and devaporation that storage is produced by described photographic fixing portion after drop, and in the guiding parts of the described plural number of described blank part another comprises the drop guiding parts, goes described collection part with the guiding drop.
9. according to technical scheme 8 described image forming apparatus, it is characterized in that:
The described collection unit branch of described drop is included in the described photographic fixing portion.
10. according to technical scheme 1 described image forming apparatus, it is characterized in that:
The guiding parts of described plural number forms the wind path passage so that described air communication is crossed the described blank part in the described photographic fixing portion.
11. an image forming method, it comprises:
Transfer step, it transfers images on the sheet material;
The photographic fixing step, it arrives described image fixing in the described sheet material by heating, and the sheet material conveyance after the photographic fixing is gone in the downstream of described image forming apparatus;
Discharge step, it is discharged to described sheet material the outside of described image forming apparatus;
Form the step in sheet material conveyance path, described sheet material conveyance path comprises sheet material single face conveyance path and conveyance path, sheet material two sides, it is characterized in that, described sheet material single face conveyance path and conveyance path, sheet material two sides comprise the blank part that the guiding parts by described plural number constitutes, the air-flow that produces when forming by image.
12., it is characterized in that according to technical scheme 11 described image forming methods:
Described air-flow comprises the steam that is produced by the heating of described photographic fixing portion.
13., it is characterized in that according to technical scheme 12 described image forming methods:
Described blank part makes the air communication mistake in the direction that is basically perpendicular to sheet material conveyance direction.
14., it is characterized in that comprising according to technical scheme 13 described image forming methods:
Be provided with electric component at an interior side cover cap, comprise the direction of the described air-flow of described steam, with to be provided with described electric component opposite in the direction of an interior described side cover cap.
15., it is characterized in that according to technical scheme 11 described image forming methods:
Described air-flow is sent into described image forming apparatus.
16., it is characterized in that according to technical scheme 15 described image forming methods:
Described air-flow cools off described blank part.
17., it is characterized in that according to technical scheme 11 described image forming methods:
Described sheet material conveyance path comprises the drop that steam condensed that absorption is produced by photographic fixing.
18., it is characterized in that according to technical scheme 11 described image forming methods:
Drop and guiding drop behind the devaporation that collection is produced by described photographic fixing go to be collected.
19., it is characterized in that according to technical scheme 18 described image forming methods:
The described collection of described drop is included in the step of described photographic fixing.
20., it is characterized in that according to technical scheme 11 described image forming methods:
Form the wind path passage so that described air communication is crossed described blank part.
According to technical scheme of the present invention, after solving above-mentioned problem, can provide novel image forming apparatus.By above-mentioned formation, when utilizing needed for example 2 kinds of (plural number) blank parts that guiding parts surrounded of sheet material conveyance, by form air-flow at device interior towards blank part, just the water droplet that produces after the water vapour dewfall that photographic fixing portion can be taken place is collected and is gathered in the blank part, do not need to be provided with in addition new formation, just can prevent the abnormal image problem that produces because of water droplet corresponding to water droplet.
According to technical scheme of the present invention, can also increase the amount of the water vapour after the photographic fixing to the air-flow of blank part gathering.
According to technical scheme of the present invention, water droplet is attached in the blank part energetically, when the water droplet attachment area being made as the position that conveyance does not have to influence to sheet material, can be corresponding to the water droplet on the whole width of sheet material.
According to technical scheme of the present invention, not only can prevent to prevent influence to electric component in the equipment because of water droplet adheres to the influence that sheet material is produced.That is, can prevent that drop (water droplet etc.) from moving in other interior positions of equipment such as single face conveyance path, conveyance path, two sides or electric component configuration position.
According to technical scheme of the present invention, blank part is by being stored in water droplet its inside, and the guiding water droplet, so just can prevent that water droplet is attached in the sheet material.
According to technical scheme of the present invention because the position of storage water droplet is the part of photographic fixing portion, because of its near the photographic fixing heating part, so the interior water droplet of abatement apparatus quickly just.
According to technical scheme of the present invention, not needing increases the parts that form wind path, so just can realize reducing component count, cost, and the miniaturization of equipment.
Description of drawings
With reference to following to accompanying drawing detailed explanation can understand complete description to public technology and feature thereof faster and betterly.Wherein,
The outward appearance side view that is applicable to image forming apparatus of the present invention that [Fig. 1] sees from the upper left side.
[Fig. 2] is the summary sectional drawing of inside configuration example of the apparatus body side of image forming apparatus shown in Figure 1.
[Fig. 3] slave unit body can carry out the summary front view (FV) of the configuration example of switch to protecgulum.
The summary front view (FV) of the configuration example that [Fig. 4] slave unit body can load and unload protecgulum.
The outward appearance side view of wanting portion of the image forming apparatus of demonstration the 2nd embodiment of the present invention that [Fig. 5] sees from right oblique upper.
[Fig. 6] Fig. 6 (a) be show the present invention's the 1st embodiment and variation 2 image forming apparatus want portion's sectional drawing, Fig. 6 (b) is the sectional drawing of guide plate in the photographic fixing of demonstration variation 3.
[Fig. 7] Fig. 7 (a) is the sectional drawing that shows guide plate in the photographic fixing of variation 2, and Fig. 7 (b) is the sectional drawing with photographic fixing export orientation plate, and Fig. 7 (c) is the side view with guide plate in the photographic fixing, and Fig. 7 (d) is the side view with storage part.
[Fig. 8] Fig. 8 (a) is the sectional drawing that shows guide plate in the photographic fixing of variation 3, Fig. 8 (b) is the sectional drawing with photographic fixing export orientation plate, Fig. 8 (c) is the side view with guide plate, photographic fixing export orientation plate and storage part in the photographic fixing, Fig. 8 (d) is the side view with photographic fixing export orientation plate, and Fig. 8 (e) is the enlarged side view of wanting portion with guide plate in the photographic fixing.
[Fig. 9] shows the photographic fixing portion of variation 4 and the side view of photographic fixing export orientation panel area.
[Figure 10] is the sectional drawing around photographic fixing portion, single face conveyance path and the conveyance path, two sides in the past the image forming apparatus.
[Figure 11] is used to remark additionally the side view of wanting portion and present embodiment etc. of image forming apparatus in the past.
Embodiment
Below, with reference to diagram the embodiments of the present invention that comprise embodiment are described.In embodiment and variation thereof, for the inscape of the parts or the formation portion product of same function or shape, in the scope that can differentiate, by giving after prosign once illustrates the explanation once more of just omitting it.
At first, with reference to Fig. 1 and Fig. 2, all formations and the action of the image forming apparatus that is applicable to an embodiment of the invention described.Shown in Figure 1 is the outward appearance side view that is applicable to the image forming apparatus of an embodiment of the invention, and shown in Figure 2 is vertical sectional drawing of the inner configuration example of this image forming apparatus.
Fig. 1 and image forming apparatus shown in Figure 2 comprise: be configured in the substantial middle of apparatus body 1, possess in sheet material the image forming part 2 of the image processing system (aftermentioned) that forms image etc.; Be configured in the below of this image forming part 2, the example of sheet material or sheet recording medium delivered to the sheet feed section 20 of 2 li of image forming parts with paper S; In image forming part 2, will be formed with front side (the equipment face side in the place ahead, right side of two figure) (the equipment rear side at the rear, left side of two figure) discharge to the inside of image, as the sheet material row paper portion 25 of sheet material discharge portion with paper slave unit body 1; Be configured in the top of image forming part 2, be used for piling up and discharge the sheet material stacking portion 40 that direction (row's paper direction) Xa discharges with paper to sheet material by sheet material row paper portion 25.
Here said sheet material, can comprise for example usefulness paper (ground paper, postcard, envelope, common paper, thin paper etc.) of transfer paper or recording chart etc., coated paper (Coated Paper: coated paper Coat Paper, art paper Art Paper), OHP sheet material or OHP film, tracing paper (tracing paper) etc., mean can carry out the image transfer printing formed media by image.
Image forming apparatus shown in two figure is the coloured image forming device of tandem type.Wait the inside at Fig. 1, Y represents to discharge perpendicular to sheet material the sheet width direction of direction Xa, and sheet material is discharged the opposite direction that direction Xb represents sheet material discharge direction Xa.
In addition, image forming part 2 is also referred to as in the image recording portion 2 that uses document image in the paper S, and sheet material stacking portion 40 is also referred to as the sheet material that is discharged from is carried out the sheet material mounting portion 40 that mounting is piled up.
2 li of image forming parts, include drum type photoreceptor 3a, 3b, 3c, 3d as shown in Figure 2 as the plural number that constitutes as mounting body or sub-image mounting body, in each photoreceptor 3a-3d, form the different each other toner picture of color respectively.In the surface of the photoreceptor 3a-3d of illustrated example, be formed with Yellow toner picture, cyan toner picture, carmetta toner picture and black toner picture respectively.Each photoreceptor 3a-3d separates the back with the interval of stipulating and is disposed abreast, with respect to the bottom of these photoreceptors 3a-3d, disposes the intermediate transfer belt 4 that constitutes as the intermediate transfer body.As this as mounting body intermediate transfer body, both can adopt drum type, also as shown shown in the example, adopt the intermediate transfer belt 4 that is constituted along the driven ring-type wheel of the direction of arrow (counter-clockwise direction among Fig. 2) band by 5,6 li of the support roller that is wound on plural number.
Because the formation around each photoreceptor 3a-3d is identical, so just to be configured among Fig. 2 in the rightmost side, the photoreceptor 3a that is formed with the Yellow toner picture is that representative explains.That is the surface along photoreceptor 3a is disposed with: the charging equipment 7 that uniform charged is handled is carried out on the surface of photoreceptor 3a; Image Intelligence is arrived the exposure of the optical scanning device (LSU) 8 in the photoreceptor 3a surface with laser radiation; The electrostatic latent image that forms in photoreceptor 3a surface because of exposure is carried out visual developing apparatus 9; The transfer apparatus 10 that Jie is configured with photoreceptor 3a in opposite directions and over the ground by intermediate transfer belt 4; Remove the cleaning equipment 11 etc. of recovery to being transferred to the toner that remains in after 4 li of the intermediate transfer belts in the photoreceptor 3a surface etc.
When image in the above-mentioned image forming apparatus formed beginning, photoreceptor 3a was rotated driving along the clockwise direction of Fig. 2, and at this moment, by charging equipment 7, the surface of photoreceptor 3a is by the polarity of uniform charged for regulation.Then, in this charged, shine the laser that is dependent on Image Intelligence, just in photoreceptor 3a, formed electrostatic latent image thus by optical scanning device 8.Then, the electrostatic latent image that in photoreceptor 3a surface, forms, by developing apparatus 9 as the Yellow toner picture by visual, this Yellow toner picture is transferred on the intermediate transfer belt 4 by transfer apparatus 10 again.
When carrying out full-color image formation, above-mentioned image forms action and similarly also is performed in remaining all photoreceptor 3b-3d, thus, Yellow toner picture, cyan toner picture, carmetta toner picture and the black toner picture that is formed at respectively in each photoreceptor 3a-3d has been transferred on the intermediate transfer belt 4 successively overlappingly.In addition, in image forming apparatus, clip intermediate transfer belt 4, disposed transfer roll 12 in opposite directions and over the ground 2 times with support roller 6.
On the other hand, 20 li of the sheet feed sections in being configured in below the image forming part 2 are provided with the sheet feed stacker 21 of sheet material resettlement section of the usefulness paper S of the sheet material that mounting is made of transfer paper, recording chart, resin film etc.; The paper supply roller of sending with paper S 22 of 21 li of this sheet feed stacker will be positioned in; Friction pad 23 with the tripping device that separates page by page with paper sent here; And the path of conveyance again 24 when forming the two sides image etc.
Sent to contraposition roller 13 by what sheet feed section 20 was sent here with paper S, its front end is run into 13 li on the contraposition roller that stopping.Thus, be corrected after the integration with inclination of paper S front end etc., contraposition roller 13 is to be formed at the color toner picture on the above-mentioned intermediate transfer belt 4, at 2 transfer printing portion places that are provided with 2 transfer rolls 12, with opportunity with the consistent defined of the leading section of paper S, again rotate, and will send in 2 transfer printing portions that are provided with 2 transfer rolls 12 with paper S.
In 2 transfer printing portions, transfer printing have not photographic fixing the color toner picture be sent to 14 li in the photographic fixing portion of fixation facility with paper S, not the heating and pressurizing of the color toner picture of photographic fixing by photographic fixing portion 14 by photographic fixing after, exit roller by sheet material row paper portion 25 is to 25a, 25b, and image surface is 40 li in the sheet material mounting portion of the row's of being discharged from paper in above being arranged on apparatus body 1 down.Above-mentioned photographic fixing portion (fixation facility) 14 comprises the photographic fixing band 14c that is wound in fixing roller 14a, the fixing roller 14a and is situated between by the backer roll 14b of photographic fixing band 14c and fixing roller 14a crimping.Photographic fixing portion 14 is not limited to above-mentioned formation, also can suitably adopt the roll-type of built-in having heaters to constitute, and perhaps type of heating adopts the IH mode.
Also have, accompanying transfer printing remaining toner etc. in the surface of the intermediate transfer belt 4 of color toner after as transfer printing after removing by band cleaning equipment 15, is prepared imaging transfer process next time.
With reference to Fig. 2 and Figure 10, come to describe to sheet material row paper portion 25 or as the formation around the conveyance path, two sides 30 in conveyance path, two sides.Near exit roller 25a, set will be formed with one-sided image with paper S switch to 30 li in sheet material row paper portion 25 or conveyance path, two sides switching part it, be the difference pawl 31 that the center can be shaken with the axle.Difference pawl 31 being directed to 26 li in row's paper path with paper after photographic fixing finished under shown position, and by exit roller 25a, 26b row paper to 41 li of row's paper discs of sheet material mounting portion 40, carry out stacking.
The image forming apparatus of Fig. 1 has comprised conveyance path or the roller that resupplies with the counter-rotating that acts on paper, using the automatic image that forms in the two sides of paper.Specifically be in the top of sheet material row paper portion 25, to be provided with turning path (switch back) 33.By sheet feed section 20 send here with paper S through after 2 the transfer printing portions, photographic fixing portion 15 that being provided with 2 transfer rolls 12, just in single face, form image.At this moment,, be formed with just being directed in this difference pawl 31 top of image in the single face in clockwise direction, can reverse, in the top of exit roller 25a that promptly can forward and reverse rotation thereby be sent to paper by difference pawl 31 is shaken.Afterwards, by the exit roller 25a that counter-clockwise direction is rotated, be directed to the lining, downstream, left side (row's paper disc 41 sides) of turning path 33 with paper S.
By behind the free end of difference pawl 31, exit roller 25a rotates in clockwise direction, and will be directed to the conveyance path, two sides shown in the two dot-dash dotted lines (paper supply reversing paths again) 30 li among Figure 10 with paper with the rear end of paper.Be configured in the conveyance path, two sides 30 with paper, join with carrying roller 32a that can reverse shown in Figure 2 and carrying roller 32b, clamping with behind the paper, through behind the conveyance path 24 more again paper supply to 13 li on contraposition roller.
As mentioned above, in the driven roller 32a that can reverse, be connected to roller 32b, when this roller 32a when counter-clockwise direction is rotated, just drive roller 32b, the paper supply again that conveyance path, two sides 30 is sent here with conveyance in the direction of principal direction contraposition roller 13.
In this formation, the two sides image that forms image in the two sides of paper S is formed action describe.By above-mentioned action, at first, transfer images in the single face of using paper S from middle transfer belt 4, and be situated between by the single face conveyance path shown in the dot-dash dotted line among Figure 10, will be through photographic fixing portion 14 use paper S, by the difference pawl 31 that shakes along clockwise among Figure 10, be directed among Figure 10 33 li of the turning paths shown in the two dot-dash dotted lines, then, the exit roller 25a of driven roller will be with the paper conveyance to row's paper disc 41 1 sides by counterclockwise rotation, when leaving the free end of difference pawl 31, carry out clockwise direction and rotate with the rear end of paper S.Hereto be after direction with the paper rear end becomes front end, with paper S towards carrying roller to Figure 10 of 32a, 32b in 30 li in the conveyance path, two sides shown in the two dot-dash dotted lines.Afterwards, as mentioned above, will be delivered to the contraposition roller to 13 li with paper S.At the contraposition roller to 13 place's alignings after opportunity, by single face is formed with image conveyance is in 2 transfer printing portions with 2 transfer rolls 12 once more with paper S, the toner picture on the intermediate transfer belt 4 just has been transferred to in the another side side of paper S.
Be used to form with the image in the paper S another side, be with paper S when conveyance is till the regulation position, form successively by the imaging process in the running.Full color toner when said here imaging process forms with aforementioned one-sided image looks like to form identical, be with the full color toner as mounting to intermediate transfer belt 4.Only, because (paper supply reversing paths again) 30 li front and back are inverted in conveyance path, two sides with paper S, with respect to initial imaging, the making of being penetrated by optical scanning device 8 of view data is controlled execution, with imaging inversely in sheet material conveyance direction.
So, transfer printing has being situated between once more by the single face conveyance path shown in the dot-dash dotted line among Figure 10 with paper S of full color toner picture in the two sides, after handling through the photographic fixing of photographic fixing portion 14, is arranged paper to row's paper disc 41 by exit roller 25a, 25b.In order to improve the efficient of two surface imagings, be used to form on formation opportunity with the image in the positive and negative of paper, carry out by control device (not shown).
In Fig. 1 and Fig. 2, the control panel of the operation control of symbol 16 representatives carrying out image forming part 2 disposes the face side of a side of this control panel 16 for the apparatus body 1 of this image forming apparatus.Therefore, in this image forming apparatus, sheet material row paper portion 25 is configured in the front face side of apparatus body 1, and it is that what to be discharged to 40 li in sheet material mounting portion is front row's paper mold of the front side direction rear side row paper of slave unit body 1 with paper that formed equipment constitutes.
In the top of apparatus body 1, be provided with on the cover unit of overlay image formation portion 2 and cover 18.The upper part of this loam cake 18 is discharged row's paper disc (sheet material mounting surface) 41 of platform as the sheet material of sheet material mounting portion 40.In the edge of the rear end side of loam cake 18, support sector is not set.Constitute by this,, hang in the rear side, just can not have obstacle ground stacking to grow the sheet material of size by its part being crossed row's paper disc 41 even surpass the long sized sheets of fore-and-aft direction width of row's paper disc 41 of loam cake 18.
In addition, loam cake 18 as shown in Figure 2, its underpart is supported with the optical scanning device 8 of the part of image forming part (image processing system) 2, is the center with the hinge 17 that is arranged in the equipment rear end side, has formed the formation that can open upward.This loam cake 18 is locked in 1 li of apparatus body by the securing rod 60 of locking device described later, when removing this locking, just enter can rocker switch state.Then, when loam cake 18 (is omitted diagram) during to the counter-clockwise direction rocker switch, the optical scanning device 8 of bottom be carried out operation and maintenance to shake rising together thereby can form assembly to image easily.Further, in this example, from the open portion of loam cake 18, can be to the photoreceptor 3a-3d of image forming part 2, be configured in charging equipment 7, developing apparatus 9 around it respectively, and cleaning equipment 11 etc. integrated 4 cartridge processings, the taking-up fitting operation that is used to change.
When shaking open above-mentioned loam cake 18, be to shake rising down with the rear end side of row's paper disc 41, when stacking has sheet material on row's paper disc 41, if careless and shake opening, the problem that the rear side of the sheet material slave unit of stacking falls will take place.That is, if forget the sheet material S that takes off stacking and during rotary upper cover 18, will the row's of being stacked in paper disc 41 li sheet material S fall problem in apparatus body 1 rear side.Though this problem can solve by in loam cake 18 rear end side holding components being set, at that rate, the sheet material that long size will take place is run into the problem on obstacle of rear end support sector.
So, in this example, with the locking of the bar 60 that unlocks, the operating portion 61 that makes loam cake 18 be in can to shake in the open state, on the row's of being arranged on paper disc 41, and in the position of hidden sheet material S in institute's stacking.60 li of this securing rods, be provided with integratedly respectively one distolateral in by the operating portion 61 of user operation, and in the other end, be the lock pawl 62 that closes mutually with the projection 64 that is fixed in apparatus body 1.Securing rod 60 is that the center is supported to rotating with the latch 63 that is fixed in 18 li of loam cakes, also by be installed in latch 63 around turned round volute spring (not shown), it is to close towards shaking of lining to pay a force with projection 64 that lock pawl 62 is endowed always.The operating portion 61 of securing rod 60 forms along the sheet material with the face on the one side by comprising and arranging paper disc 41, is formed with the fan-shaped recess 44 (Fig. 1) of catching operating portion 61 with hand for 41 li at row's paper disc.
As described in above-mentioned formation, when loam cake 18 is opened, by hand being inserted recess 44, described pair of force ground operating portion 61 opposings of securing rod 60 being turned round volute spring (not shown) upwards lifts, securing rod 60 is that rotate along clockwise at the center with latch 63 just, and lock pawl 62 has just broken away from from projection 64.Then, when continuing upwards to lift operating portion 61, loam cake 18 is that the center has been shaken with hinge 17 just.
So, because the operating portion 61 of securing rod 60 that can rocker switch loam cake 18 is configured in 41 li of row's paper discs that stacking has sheet material S, when just sheet material S state being arranged on the row's of preventing paper disc 41 conscientiously, loam cake 18 shaken opening.
In addition, apparatus body 1 is formed with in order to insert the opening 29 of sheet feed stacker 21 27 li of protecgulums as shown in Figure 4, can load and unload in left and right directions (from the body front) lining of figure sheet feed stacker 21 from opening 29.Shown in Figure 4 be with sheet feed stacker 21, friction pad 23 and again conveyance path 24 integrally slave unit body 1 along the P direction take out, state when shirking.Thus, just can carry out whole previous action to maintenance, consumables replacing, paper jam processing etc. in slave unit body 1 front, thereby do not need to carry out the space of aforesaid operations, when reduction is provided with area, can also provides and be convenient to operation, image forming apparatus cheaply from the back side.
With reference to Figure 10 and Figure 11, to come the photographic fixing portion 14 in the image forming apparatus in the conventional art, single face conveyance path 35, conveyance path 30, two sides and exterior circumferential, the content relevant with the aftermentioned embodiment describes.
In Figure 10, the 70th, guide plate in the photographic fixing of the guiding parts in formation formation conveyance path, two sides 30,71 are arranged near the outlet of photographic fixing portion 14, photographic fixing export orientation plate as the guiding parts that forms single face conveyance path 35,75 are arranged near the below of exit roller 25b, as row's paper lower guide plate of the guiding parts that forms single face conveyance path 35.
Here, in " guiding parts " of the present invention, except to the original guiding parts that leads with paper, also comprised the parts that are connected in the guiding parts that leads with paper, or the term on the generalized concepts such as guiding rib that suitably are wholely set.
In Figure 11,1a represents a left side outer dress cover plate, 1b represents right outer dress cover plate, 77 expressions are respectively formed at the window shutter portion in a left side outer dress cover plate 1a and the right outer dress cover plate 1b, when look in the front of 78 expression slave unit bodies 1, the electric component allocation position that is provided with in from a left side outer dress cover plate 1a of the sidepiece that is equivalent to apparatus body 1 to left framework 55 sides of body, Xc represents sheet material conveyance direction.
Also have, in Figure 10 and Figure 11, also disposed the guide plate (not shown) that constitutes conveyance paths, two sides 30 with respect to guide plate in the photographic fixing 70 by integrally formed protecgulum 27 (with reference to Fig. 1-Fig. 4).In addition, in Figure 10, in the photographic fixing guide plate 70 and photographic fixing export orientation plate 71 constituted with a left side in scheming tiltedly the upper end be to shake the guide plate assembly that fulcrum carries out free switch, with it when open, just can realize the operability raising (Fig. 5 described later and Fig. 6 are as the same) of the maintenance of photographic fixing portion 14 or paper jam processing etc.
(the 1st embodiment)
Below, with reference to Fig. 6 the 1st embodiment of the present invention is described.
In the present embodiment, the blank part 67 that surrounds by guide plate 70 and photographic fixing export orientation plate 71 etc. in the photographic fixing of the guiding parts of plural number, be set at compared with conveyance path, two sides 30 more in the top by the photographic fixing portion 14 of photographic fixing portion 14, together with the blank part 69 that surrounds by row's paper lower guide plate 75 grades, with the high-temperature portion of the photographic fixing portion 14 that produces the air-flow in the back side of guide plate 70 in blank part 67,69 and the photographic fixing and photographic fixing export orientation plate 71, and wind path shape described later etc. has constituted the air-flow generating apparatus.
As shown in Figure 6, from the air current A that comprises water vapour that the high-temperature portion of photographic fixing portion 14 rises, gathered 67 li of the blank parts that surrounded by guide plate in the photographic fixing 70 and photographic fixing export orientation plate 71.Blank part 67 also has the wooden partition shape that can carry out regulation to water vapour except having the effect of assembling hypogene water steam in the top, and after being formed by above-mentioned 2 kinds of guide plates, its formation has more leakproofness.
Also have,, shown in figure, around the blank part 69 that forms etc., when the gathering water vapour, also can have same function by row's paper lower guide plate 75 as same formation.
(the 2nd embodiment)
As shown in Figure 5, the air-flow generating apparatus of present embodiment is in the inside of blank part 67, with the direction vertical substantially by the usefulness paper conveyance face of the sheet material conveyance face of sheet material conveyance direction Xc conveyance in, blank part promptly shown in Figure 5 generates and has air-flow B for 67 li.
It as shown in figure 11, both can (all temperature of equipment be by the airflow design in the apparatus body 1 by the angry stream of vent window portion 77 natural real estates of the air-flow generating apparatus in the left and right sides outer mounting cover lid 1a, the 1b that for example are arranged on the right framework 56 of body left side framework 55 and body, can in about apparatus body 1, produce no small temperature difference, for example make when the left surface side is higher than right flank side, will produce air-flow because of temperature difference 67 li of blank parts), also can wait the air-flow of forcing to generate vertical direction by aerofoil fan.
By this air-flow B vertical with sheet material conveyance direction Xc, shown in Figure 5ly rise and assembled to blank part 67, by the air current A of photographic fixing portion 14 towards 67 li of blank parts, just more can be subjected to being introduced into the effect of blank part 67, and its wind speed is accelerated, further, can also increase the effect that water vapour is introduced into blank part 67.
As mentioned above, the natural airflow that produces by vent window 77 by left outer mounting cover lid 1a, or attract outer gas by fan, by the vent window 77 of right outer mounting cover lid 1b the constituting of exhaust air draft outside machine, just can suck fresh extraneous air, cool off blank part 67 by this fresh extraneous air, just can the water vapour of being assembled be cooled off, make it be condensed into drop.
This point, be not subjected to the influence of fresh air, and by the conveyance face side of the photographic fixing export orientation plate 71 of photographic fixing portion 14 heating of apparatus body 1 inside, can not adhere to drop because of temperature is high, by reducing temperature by the inner face side (blank part 67 sides) of guide plate 70 and photographic fixing export orientation plate 71 in the photographic fixing of fresh air cooling, just easily dewfall with adhere to drop.
The height of the conveyance rib by increasing guide plate 70 in the photographic fixing and photographic fixing export orientation plate 71 can also be guaranteed temperature difference further.
In Fig. 5,37 expressions are led and the two sides guide part of setting as the conveyance in conveyance path, two sides 30, and the 74 expressions conveyance as row's paper path 26 shown in Figure 2 is led and row's paper guide part of setting.
As shown in figure 11, in equipment in the past, considering the allocative efficiency of electric components such as electric wire distribution, is to concentrate electric component is set in a certain side of body left and right sides framework 55 and 56.In the present embodiment, between body left side framework 55 and left outer mounting cover lid 1a, be provided with electric component configuration position 78.
Here, opposite by making with electric component configuration position 78 sides perpendicular to the direction of air-flow C in the blank part 67 of sheet material conveyance direction Xc or D, just can prevent because of adhering to the problem that drop produces in the electric component.
The above-mentioned the 1st and the formation of the 2nd embodiment outside, can also be following variation 1.That is in variation 1, by the lining, the back side (blank part 67 inner faces) of guide plate 70 and photographic fixing export orientation plate 71 in the photographic fixing that constitutes blank part 67, sticking card is hygroscopic part for example, just the drop of assembling can be stored in 67 li of blank parts easily.
Outside the formation of above-mentioned the 1st, the 2nd embodiment and variation 1, can also be following variation 2.That is, in variation 2, shown in Fig. 6 (a) and Fig. 7 (a)-Fig. 7 (d), reverse side (back side) lining with paper conveyance face of guide plate 70 in the photographic fixing that constitutes blank part 67, the shape that is set to tilt by the rib 70a that leads so that stream of liquid droplets to stores location, just the drop conveyance can be directed in the position of hope.For example, be with attached to the drop 68 in 70 back sides of guide plate in the photographic fixing here, by drop guiding rib 70a, the conveyance and storing in photographic fixing export orientation plate 71 back sides that are positioned at the bottom of can leading, 72 li of the storage parts that surrounds by rib 71a.
Outside above-mentioned, can also be following variation 3.That is, in variation 3, shown in Fig. 6 (b) and Fig. 8 (a)-Fig. 8 (e), in the direction perpendicular to sheet material conveyance direction Xc in the back side of guide plate in the photographic fixing 70, the rib 70b1-70b5 that configuration height is different (what adopt here is the formation that the direction rib along with air-flow increases gradually), and will be directed to 72 li of the storage parts at photographic fixing export orientation plate 71 back sides that are arranged on the bottom attached to the drop 68 in each rib 70b1-70b5.Thus, just can be with drop 68 near the heating parts that can regard the photographic fixing portion 14 of photographic fixing portion 14 parts as, and move to the photographic fixing export orientation plate 71 of high temperature more, thereby evaporate drop quickly.
Except that above-mentioned, can also be following variation 4.That is, in variation 4, as shown in Figure 9, between blank part 67 and photographic fixing portion 14, formed the wind path shape that constitutes by guide plate in the photographic fixing 70 and photographic fixing export orientation plate 71.
That is, as shown in the figure,, just can easily guarantee the air current A that the blank part 67 directly over roughly goes towards photographic fixing portion 14 heating parts by 71 li hole shape 71b being set at photographic fixing export orientation plate.That is, 71 li of photographic fixing export orientation plates, possessed the function of drop storage, heating and the air-flow guiding of variation 3 simultaneously.
As mentioned above,, promptly can obtain, after carrying out above-mentioned action effect, produce above-mentioned invention effect by above-mentioned formation according to present embodiment.
The present invention is not limited to the interior row of the body paper mold image forming apparatus in the above-mentioned embodiment, can be applicable to for example black and white copying spare, monochrome laser printer, ink-jet printer equally, or by transfer article tandem type coloured image forming device of the overlapping direct transfer printing mode of transfer printing successively in the conveyance sheet material.Need not superfluous words, it can be applicable to that also the photoreceptor of ring-type is in the single image forming apparatus.Especially small-sized, light-weighted image forming apparatus, above-mentioned effect is more remarkable.
The basis of present patent application and priority request be on July 2nd, 2008, at the Japanese patent application JP2008-173431 of Jap.P. office application, its full content draws the do combination at this.
From the above many improvement and variation can also be arranged.That is within the scope of the claims, the disclosure of this patent specification is not limited to above-mentioned explanation.
Claims (14)
1. image forming apparatus, it comprises:
Transfer printing portion, it transfers images on the sheet material;
Photographic fixing portion, it is configured in the downstream of described transfer printing portion of sheet material conveyance direction, described photographic fixing portion by heating with described image fixing in described sheet material, and the sheet material conveyance after the photographic fixing gone in the downstream of described image forming apparatus;
Discharge portion, it is configured in the downstream of described photographic fixing portion of described sheet material conveyance direction, and described discharge portion is discharged to described sheet material the outside of described image forming apparatus;
The guiding parts of plural number, it is positioned at described photographic fixing portion top, formed sheet material conveyance path, described sheet material conveyance path comprises sheet material single face conveyance path and conveyance path, sheet material two sides, it is characterized in that, described sheet material single face conveyance path and conveyance path, sheet material two sides comprise the blank part that the guiding parts by described plural number constitutes, the air-flow that produces when forming by image, and described air-flow comprises steam that the heating part of described photographic fixing portion produces and the air that passes through in the direction that is basically perpendicular to sheet material conveyance direction.
2. image forming apparatus according to claim 1 is characterized in that comprising:
Be provided with electric component at an interior side cover cap, in this side cover cap, be provided with electric component, and the direction of described air-flow that comprises described steam is towards the opposite side flow of described side cover cap that is provided with described electric component.
3. image forming apparatus according to claim 1 is characterized in that comprising:
The side cover cap, it is in the direction of both ends of extending along described photographic fixing minister degree direction, and is perpendicular with described photographic fixing minister degree direction,
All be provided with the opening of plural number in each described side cover cap, described air communication is crossed the described opening of described side cover cap.
4. image forming apparatus according to claim 1 is characterized in that comprising:
The side cover cap, it is in the direction of both ends of extending along described photographic fixing minister degree direction, and is perpendicular with described photographic fixing minister degree direction,
All be provided with the opening of plural number in each described side cover cap, the described airflow direction that is produced by forced draft is basically parallel to the described length direction of described photographic fixing portion.
5. image forming apparatus according to claim 1 is characterized in that:
In the guiding parts of described plural number at least one comprises the moisture absorption parts, to absorb and to store in the described blank part drop that steam was condensed that is produced by described photographic fixing portion.
6. image forming apparatus according to claim 1 is characterized in that:
One in the guiding parts of the described plural number of described blank part comprises the collection part, with collect and devaporation that storage is produced by described photographic fixing portion after drop, and in the guiding parts of the described plural number of described blank part another comprises the drop guiding parts, goes described collection part with the guiding drop.
7. image forming apparatus according to claim 1 is characterized in that:
The guiding parts of described plural number forms the wind path passage so that described air communication is crossed described blank part.
8. image forming method, it comprises:
Transfer step, it transfers images on the sheet material;
The photographic fixing step, it arrives described image fixing in the described sheet material by heating, and the sheet material conveyance after the photographic fixing is gone in the downstream of image forming apparatus;
Discharge step, it is discharged to described sheet material the outside of described image forming apparatus;
Form the step in sheet material conveyance path, described sheet material conveyance path comprises sheet material single face conveyance path and conveyance path, sheet material two sides, it is characterized in that, described sheet material single face conveyance path and conveyance path, sheet material two sides comprise the blank part that the guiding parts by plural number constitutes, the air-flow that produces when forming by image, and described air-flow is included in heats steam that is produced and the air that passes through in the described photographic fixing step in the direction that is basically perpendicular to sheet material conveyance direction.
9. image forming method according to claim 8 is characterized in that comprising:
Be provided with electric component at an interior side cover cap, in this side cover cap, be provided with electric component, and the described air-flow that comprises described steam is towards the opposite side flow of described side cover cap that is provided with described electric component.
10. image forming method according to claim 8 is characterized in that:
Described air-flow is sent into described image forming apparatus.
11. image forming method according to claim 10 is characterized in that:
Described air-flow cools off described blank part.
12. image forming method according to claim 8 is characterized in that:
Described sheet material conveyance path comprises the drop that steam condensed that absorption is produced by photographic fixing.
13. image forming method according to claim 8 is characterized in that:
Drop and guiding drop behind the devaporation that collection is produced by described photographic fixing go to be collected.
14. image forming method according to claim 8 is characterized in that:
Form the wind path passage so that described air communication is crossed described blank part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008173431A JP5239560B2 (en) | 2007-12-28 | 2008-07-02 | Image forming apparatus |
| JP173431/08 | 2008-07-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101620390A CN101620390A (en) | 2010-01-06 |
| CN101620390B true CN101620390B (en) | 2011-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101396984A Expired - Fee Related CN101620390B (en) | 2008-07-02 | 2009-07-02 | Image forming apparatus and image forming method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5953774B2 (en) * | 2012-01-31 | 2016-07-20 | ブラザー工業株式会社 | Image forming apparatus |
| CN109960125A (en) * | 2017-12-25 | 2019-07-02 | 柯尼卡美能达办公系统研发（无锡）有限公司 | Fixing device and image forming apparatus |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1510532A (en) * | 2002-12-24 | 2004-07-07 | ��ʿͨ��ʽ���� | Imager and processing case therewith |
| CN1900832A (en) * | 2005-07-22 | 2007-01-24 | 富士施乐株式会社 | Sheet carrier and image formation apparatus |
| CN1967411A (en) * | 2005-11-18 | 2007-05-23 | 三星电子株式会社 | Cooling apparatus and image forming device having the cooling apparatus |
| CN101004568A (en) * | 2006-01-19 | 2007-07-25 | 京瓷美达株式会社 | Image forming apparatus |
| JP2007240966A (en) * | 2006-03-09 | 2007-09-20 | Kyocera Mita Corp | Image forming apparatus |
| CN101644909A (en) * | 2008-08-06 | 2010-02-10 | 佳能株式会社 | Image forming apparatus |
-
2009
- 2009-07-02 CN CN2009101396984A patent/CN101620390B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1510532A (en) * | 2002-12-24 | 2004-07-07 | ��ʿͨ��ʽ���� | Imager and processing case therewith |
| CN1900832A (en) * | 2005-07-22 | 2007-01-24 | 富士施乐株式会社 | Sheet carrier and image formation apparatus |
| CN1967411A (en) * | 2005-11-18 | 2007-05-23 | 三星电子株式会社 | Cooling apparatus and image forming device having the cooling apparatus |
| CN101004568A (en) * | 2006-01-19 | 2007-07-25 | 京瓷美达株式会社 | Image forming apparatus |
| JP2007240966A (en) * | 2006-03-09 | 2007-09-20 | Kyocera Mita Corp | Image forming apparatus |
| CN101644909A (en) * | 2008-08-06 | 2010-02-10 | 佳能株式会社 | Image forming apparatus |
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| CN101620390A (en) | 2010-01-06 |
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