JP2017097285A - Image forming apparatus and static eliminator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent vibration of a sheet having images formed thereon which is being conveyed when blowing air to cool the sheet and eliminating static electricity on the sheet.SOLUTION: There is provided an image forming apparatus comprising: an image forming part that forms images based on image data; a static eliminating part configured by including a static eliminating roller pair that eliminating a charge remaining on a sheet having the images formed thereon in the image forming part; and an air blowing part that blows air to cool the sheet having passed through the static eliminating roller pair of the static eliminating part, wherein the static eliminating part is configured by including a sheet conveyance guide that supports a sheet having passed through the static eliminating roller pair, and the air blowing part includes an air blowing guide that blows air to the downstream side in a sheet conveyance direction with respect to a position where the sheet conveyance guide supports a sheet.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a static eliminator that neutralizes an image-formed sheet and an image forming apparatus including such a static eliminator.

In an electrophotographic image forming apparatus, that is, a copying machine, a printer, a facsimile machine, or a multifunction machine having these functions, a toner image formed on an image carrier is disposed on the back side of a sheet at a transfer position. The image is transferred onto the sheet by the potential of the transfer portion.
As a result, the image-formed paper has a charge remaining at the time of transfer, and the paper being transported may stick to each part due to static electricity, or a transport abnormality may occur when trying to stick.

In order to prevent such electrostatic sheet sticking, a pair of static eliminating rollers that removes the electric charge remaining on the paper is provided, and a mechanism for removing the residual electric charge by transporting the paper between the pair of static eliminating rollers is provided. Existing.
In the image formation, the toner image on the paper is brought into close contact with the paper by the heat and pressure of the fixing device after the transfer. For this reason, the sheet immediately after being output from the image forming apparatus is in a state where not only the residual charge at the time of transfer but also the high temperature state at the time of fixing remains. Due to the improvement in productivity of the image forming apparatus, the number of sheets to be output per unit time increases, heat at the time of fixing is difficult to escape, and a situation where the sheets are likely to remain at a high temperature has occurred. This heat also dries the paper, and it is easy for sticking of the paper being conveyed to occur.

  For this reason, in the above static elimination apparatus, in addition to static elimination, providing a ventilation part and performing ventilation cooling is proposed. Related techniques are described in the following patent documents.

JP 2008-134484 A

In the above Patent Document 1, a cooling device is proposed that cools a sheet that has been fixed and heated to a high temperature in a discharge unit.
By the way, in recent years, there is an image forming system that is used as an image forming system in a state in which a post-processing device that performs various post-processing such as bookbinding processing is not connected to a sheet output from the image forming device. ing.

In such an image forming system, a thin static eliminator is provided between the image forming apparatus and the post-processing apparatus because of the installation space.
In FIG. 9, the image forming apparatus 100 including the image forming unit 150 and the fixing unit 160, the neutralizing device 200 including the neutralizing unit 210 and the air blowing unit 220, and the post-processing device 300 including the post-processing unit 350 are included in the sheet conveyance direction. The image forming system 1 in a state of being connected along is illustrated.

Here, the static eliminator 200 is configured to include a static eliminator 210 having a static eliminator pair and a blower 220 that blows air to the paper in the vicinity of the static eliminator pair.
In such an image forming system 1, the thin static elimination device 200 is provided between the image forming apparatus 100 and the post-processing apparatus 300 because of the installation space.

  Here, FIG. 10 shows a schematic configuration of the static eliminator 200. Here, the neutralizing rollers 201a and 210b constitute a neutralizing roller pair. In addition, the air guide 212 is configured to guide and cool the air flow (cooling air) from the air blowing unit (not shown) to the paper P immediately after passing through the static elimination roller pair.

  As a result of confirmation by the inventors of the present application, the sheet P immediately after passing through the pair of neutralizing rollers is conveyed with the leading end thereof being a free end, and the cooling air from the air blowing guide 212 is applied to the entire sheet P. It will vibrate. However, if the leading edge of the sheet reaches the input roller of the post-processing apparatus 300, the vibration is suppressed because it is no longer a free end. Such vibration of the paper P is self-excited vibration called stick-slip. Then, it has been found that such a vibration of the paper P causes a problem that an unpleasant sound is generated.

  The present invention has been made in view of such problems, and it is an object of the present invention to prevent the sheet being conveyed from being vibrated when air cooling and static elimination are performed on the image-formed sheet.

One aspect of the image forming apparatus and the static eliminator of the present invention that solves the above-described problems is as follows.
(1) The present invention includes an image forming unit that forms an image based on image data on a sheet, and a pair of neutralizing rollers that removes charge remaining on the sheet on which the image is formed by the image forming unit. The neutralization section, the axial direction of the neutralization roller pair as a longitudinal direction, and having an opening in the longitudinal direction, arranged on the upper side in the vertical direction of the neutralization section, a guide rail provided on the upper side of the neutralization section, A blower section provided with a slit-shaped blower opening on the lower side along the opening of the guide rail toward the charge removal section, and cooling the paper that has passed through the charge removal roller pair by blowing air, and the charge removal The section includes a slider that is slidably supported by the guide rail, and is detachable from the image forming apparatus, and includes a sheet conveyance guide that supports the sheet that has passed through the charge removal roller pair, Blow Comprises a blow guide said sheet transport guide for blowing air on the downstream side in the sheet conveying direction from the position for supporting the sheet, characterized in that.

  (2) The present invention includes an image forming unit that forms an image based on image data on a sheet, and a pair of neutralizing rollers that removes charge remaining on the sheet on which the image is formed by the image forming unit. An image forming apparatus comprising: a neutralization unit; and a blower unit that cools the sheet that has passed through the neutralization roller pair of the neutralization unit by blowing air, wherein the neutralization unit removes the sheet that has passed through the neutralization roller pair It is comprised including the paper conveyance guide to support, The said ventilation part is equipped with the ventilation guide which ventilates to the downstream of a paper conveyance direction from the position where the said paper conveyance guide supports the said paper, It is characterized by the above-mentioned.

  (3) In the above (2), it further comprises a guide rail having an axial direction in the longitudinal direction with the axial direction of the neutralizing roller pair as the longitudinal direction, and the neutralizing portion is slidable on the guide rail And a slider that is supported by the image forming apparatus, and is configured to include a sheet conveyance guide that supports the sheet that has passed through the pair of neutralizing rollers. A slit-shaped air outlet along the opening of the guide rail, and an air guide that blows air downstream from the position where the paper transport guide supports the paper in the paper transport direction. Prepare.

(4) In the above (1) to (3), the blower guide is characterized in that an area close to a path for transporting the paper is formed of an elastic body.
(5) In the above (1) to (4), the paper transport guide is disposed in a state in which a portion supporting the paper protrudes into a transport path for transporting the paper output from the neutralizing roller pair. It is characterized by that.

  (6) In the above (1) to (5), the blowing guide is configured to include a plurality of blowing paths so as to blow air to different positions in the paper transport direction.

In the image forming apparatus and the static eliminator reflecting one aspect of the present invention, the following effects can be obtained.
(1) In the present invention, the static elimination unit configured to include a roller pair that removes electric charges remaining on the paper on which the image is formed by the image forming unit includes a paper conveyance guide that supports the paper that has passed through the roller pair. The air blowing section that cools the paper that has passed through the roller pair of the static elimination section by blowing air includes a blow guide that blows air downstream from the position where the paper conveyance guide supports the paper in the paper conveyance direction. The sheet being transported immediately after passing is cooled by the air blowing guide while being supported by the sheet transport guide, so that the sheet is pressed against the sheet transport guide and no vibration is generated.

  The discharge roller pair further includes a guide rail having an opening in the longitudinal direction with the axial direction of the pair of neutralizing rollers as a longitudinal direction, and the blower is configured with a slit-shaped blower opening along the opening of the guide rail. In addition, the static eliminator is configured to be detachable from the image forming apparatus by including a slider that is slidably supported by the guide rail, and receives air from the blower using the opening of the guide rail. By being comprised, it becomes possible to arrange | position a ventilation part and a static elimination part efficiently. And since the static elimination part and the ventilation part are arrange | positioned at the up-down direction in the orthogonal | vertical direction with respect to the paper surface of a paper, it is possible to arrange | position a ventilation part and a static elimination part efficiently and to comprise a static elimination apparatus thinly. Become.

  (2) In the present invention, the static eliminator configured to include a roller pair that removes charge remaining on the paper on which the image is formed by the image forming unit includes a paper conveyance guide that supports the paper that has passed through the roller pair. The air blowing section that cools the paper that has passed through the roller pair of the static elimination section by blowing air includes a blow guide that blows air downstream from the position where the paper conveyance guide supports the paper in the paper conveyance direction. The sheet being transported immediately after passing is cooled by the air blowing guide while being supported by the sheet transport guide, so that the sheet is pressed against the sheet transport guide and no vibration is generated.

  (3) In the above (2), it further comprises a guide rail having an opening in the longitudinal direction with the axial direction of the neutralizing roller pair as the longitudinal direction, and the blower is slit-shaped along the opening of the guide rail The static eliminator is configured to be detachable from the image forming apparatus by including a slider that is slidably supported by the guide rail, and uses the opening of the guide rail. By being configured to receive air from the air blowing unit, the air blowing unit and the charge removal unit can be efficiently arranged. In addition, since the static elimination unit and the blower unit are arranged in the vertical direction in the direction perpendicular to the paper surface of the paper, it is possible to efficiently arrange the blower unit and the static elimination unit to make the static elimination device thin. Become.

(4) In the above (1) to (3), since the blower guide is formed of an elastic body in the area close to the paper transport path, the paper guide is also provided when the end of the air blow guide is brought close to the paper transport path. It is possible to perform good air cooling that prevents vibration without affecting the air.
(5) In the above (1) to (4), the portion supporting the paper in the paper transport guide is disposed in a state of projecting to the transport path for transporting the paper output from the roller pair. Can be blown and cooled while abutting against the paper transport guide, and the vibration suppressing effect is increased.

  (6) In the above (1) to (5), since the air blowing guide has a plurality of air blowing paths so as to blow air to different positions in the paper conveyance direction, the paper is pressed against the paper conveyance guide and vibration is generated. A large cooling effect can be obtained while maintaining the state of not being performed.

1 is a configuration diagram illustrating a configuration of an image forming system according to an exemplary embodiment of the present invention. It is a block diagram which shows the structure of the static elimination apparatus of embodiment of this invention. It is a block diagram which shows the structure of the static elimination apparatus of embodiment of this invention. It is operation | movement explanatory drawing which shows the paper passing state of the static elimination apparatus of embodiment of this invention. It is operation | movement explanatory drawing which shows the paper passing state of the static elimination apparatus of embodiment of this invention. It is operation | movement explanatory drawing which shows the paper passing state of the static elimination apparatus of embodiment of this invention. It is operation | movement explanatory drawing which shows the paper passing state of the static elimination apparatus of embodiment of this invention. It is operation | movement explanatory drawing which shows the paper passing state of the static elimination apparatus of embodiment of this invention. It is explanatory drawing which shows the operation state of the conventional static elimination apparatus. It is explanatory drawing which shows the operation state of the conventional static elimination apparatus.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings. Here, the embodiment will be described in detail with reference to an image forming system 1 including a static eliminator.
[Entire system configuration]
With reference to FIG. 1, a configuration of an image forming system 1 including a static eliminator according to the present embodiment will be described.

  As shown in FIG. 1, the image forming system 1 includes an image forming apparatus 100, a charge removal apparatus 200, and a post-processing apparatus 300. The neutralization device 200 may exist separately from the image forming apparatus 100 as illustrated in FIG. 1, but may be included after the fixing unit 160 of the image forming apparatus 100, or may be input to the post-processing apparatus 300. It may be built in the side. Here, the image forming system 1 will be described using a specific example in which the static eliminator 200 is disposed between the image forming apparatus 100 and the post-processing apparatus 300.

  In FIG. 1, the image forming apparatus 100 includes a paper feeding unit 105, an image forming unit 150, and a fixing unit 160. Here, the image forming apparatus 100 conveys the sheet from any tray of the sheet feeding unit 105 and forms a toner image on the sheet by the image forming unit 150. For example, an image using toner is formed on a sheet by electrophotographic process, such as charging, exposure, development, primary transfer, and secondary transfer. The toner image formed on the paper is fixed in a stable state by heat and pressure in the fixing unit 160. The sheet on which the toner image is fixed by the fixing unit 160 is conveyed toward the downstream static elimination device 200.

  The static eliminator 200 receives a sheet on which an image has been formed by the image forming apparatus 100, and includes a static eliminator 210 that removes the charge of the sheet by a pair of static eliminator rollers, and a blower unit 220 that blows and cools the sheet that has passed through the pair of static eliminators. It is prepared and configured. A blower unit is disposed above the static elimination unit 210 (upper side in the vertical direction of the paper surface of the paper).

  The positional relationship between the static elimination roller pair of the static elimination unit 210 and the blower unit 220 is roughly shown in FIG. 2 in a three-dimensional manner. In order to make the static eliminator 200 thin in the paper conveyance direction, it is desirable to use a sirocco fan in the blower unit 220 whose paper conveyance direction is the rotation axis direction. The sheet that has been neutralized by the neutralizing roller pair is conveyed toward the downstream post-processing device 300.

The post-processing device 300 accepts the paper that has been neutralized by the static eliminator 200, and the post-processing unit 350 performs various post-processing such as bookbinding processing. The paper post-processed by the post-processing unit 350 is discharged as a paper bundle or booklet.
[Details of static eliminator (1)]
FIG. 3 is an explanatory diagram showing, in an enlarged manner, the basic configuration in the vicinity of the static elimination unit 210 in the static elimination device 200. A blower unit 220 is disposed above the charge removal unit 210.

  Here, in the housing 201 of the static eliminator 200, the partition wall 202 between the static eliminator 210 and the air blower 220 is provided with an opening having the longitudinal direction of the axial direction of the static eliminator pair (static eliminator rollers 201a and 210b). It has been. Similarly, a guide rail 230 having an opening in the longitudinal direction with the axial direction of the static eliminating roller pair as the longitudinal direction is provided in the partition wall 202. Note that the opening of the partition wall 202 and the opening of the guide rail 230 coincide. The air blowing unit 220 includes a slit-shaped air outlet along the guide rail 230 and the opening of the partition wall 202. Thereby, the static elimination part 210 is comprised so that the ventilation from the ventilation part 220 may be received using the opening part of the guide rail 230 and the partition 202. FIG.

  Further, the static elimination unit 210 includes a plurality of sliders 211 that are slidably supported on the guide rail 230 on the top plate. When the guide rail 230 and the slider 211 slide, the charge removal unit 210 is configured to be detachable from the charge removal apparatus 200. In addition to sliding, the guide rail 230 and the slider 211 may be a mechanism in which a roller is provided on the slider 211 side. Further, the combination of the slider 211 and the guide rail 230 can be arranged in reverse.

  Further, when removing the static elimination unit 210 from the static elimination device 200, it is performed by pulling out the static elimination unit 210 in the direction perpendicular to the plane of FIG. In addition, when attaching the removed static elimination part 210 to the static elimination apparatus 200, it carries out by inserting the static elimination part 210 by the procedure reverse to removal from the perpendicular | vertical direction (back or front) of FIG.

  The neutralization rollers 201a and 210b constituting the neutralization roller pair eliminate the residual charge by a potential opposite to the electric charge of the remaining sheet P by nipping and conveying the sheet P, or The charge is discharged by discharging the electric charge to the ground or the like. Since the mechanism of static elimination and the rotational driving of the roller are well known, detailed description of a voltage generation unit, a conductive unit, a rotational drive source, etc. for static elimination is omitted.

  In FIG. 3, a paper transport guide 214 for supporting the paper P transported through the pair of neutralizing rollers is provided near the discharge port of the static eliminating section 210. In this paper conveyance guide 214, the part supporting the paper P (the part in contact with the paper P) is a conveyance path (the broken line in FIG. 3 (the center of the static elimination roller pair) that conveys the paper P output from the static elimination roller pair. And a straight line connecting the rollers (not shown) at the entrance of the downstream apparatus)).

  In FIG. 3, the air blowing guide 212 sends air flow (cooling air) from the air blowing unit 220 toward the downstream side in the paper conveyance direction from the position where the paper conveyance guide 214 supports the paper P ( The white arrows in FIG. 3) are arranged. In addition, although the ventilation guide 212 is provided in the inside of the static elimination part 210, it can be considered that it is a part of the ventilation part 220 in order to control ventilation.

  FIG. 4 schematically shows a state in which the paper P being conveyed is hooked on the static elimination unit 210 of the static elimination device 200. Here, the sheet P being transported immediately after passing through the pair of neutralizing and neutralizing rollers (the neutralizing rollers 201a and 210b) is in a state where the vicinity of the leading end is supported from below by the sheet conveying guide 214. Then, the cooling air from the air blowing unit 220 whose direction is adjusted by the air blowing guide 212 hits the leading end portion of the paper P that has passed through the paper guide 214 from above. As a result, the vicinity of the front end of the paper P is pressed against the paper transport guide 214 by the cooling air from above, and no vibration is generated during transport of the free end of the paper P as described in the prior art. Become.

  In the above configuration, since the air blowing unit 220 and the charge removal unit 210 are efficiently arranged in the vertical direction perpendicular to the paper surface of the paper P, the charge removal device 200 in the image forming system 1 is configured to be thin. It becomes possible to do. Note that the vertical relationship between the air blowing unit 220 and the charge removal unit 210 may be reversed. That is, it is also possible to prevent vibration by supplying the cooling air from the lower side of the static eliminating unit 220 and suppressing the sheet conveyance guide on the upper side of the conveyance path with the cooling air from the lower side.

[Details of static eliminator (2)]
FIG. 5 is an explanatory diagram showing, in an enlarged manner, a second configuration example in the vicinity of the charge removal unit 210 in the charge removal apparatus 200. A blower unit 220 is disposed above the charge removal unit 210.
The difference from FIG. 3 is that the tip of the air blowing guide 212 close to the paper conveyance path is extended by an elastic air blowing guide 212c made of an elastic body. The other parts of FIG. 5 are the same as those of FIG.

  The elastic air guide 212c is preferably made of a film-like material having elasticity such as a Mylar film, but is not limited thereto. For example, the air blowing guide 212 and the elastic air blowing guide 212c may be made of the same material as a whole, and may have a structure in which the thickness near the tip is gradually reduced to give elasticity near the tip. .

  In the case of the configuration of FIG. 5, since the elastic air guide 212c is formed of an elastic body, the elastic air guide 212c can be brought close to the paper conveyance path to realize appropriate and effective air blowing. Even if the sheet P comes into contact with the sheet P, the sheet P is not affected at all.

[Details of static eliminator (3)]
FIG. 6 is an explanatory diagram showing, in an enlarged manner, a third configuration example in the vicinity of the charge removal unit 210 in the charge removal apparatus 200. A blower unit 220 is disposed above the charge removal unit 210.
3 to 5 is different from the air guide 212a as the first air guide in addition to the air guide 212b as the second air guide that blows air to a position downstream of the air guide 212a in the paper transport direction. Is provided. In other words, a plurality of air paths that branch the air from the air blowing unit 220 are provided so that air is blown to different positions in the paper conveyance direction. It is important that the first cooling air by the air blowing guide 212a and the second cooling air by the air blowing guide 212b do not collide with each other, that is, do not cross in the air blowing direction. In addition, in FIG. 6, although the ventilation guide 212b is only the part ahead of the branch part, it may be the same shape as the ventilation guide 212a.

  As described above, since the air blowing guides 212a and 212b have a plurality of air blowing paths so as to blow air to different positions in the paper conveyance direction, the state where the paper P is pressed against the paper conveyance guide 214 and no vibration is generated is maintained. However, a large cooling effect can be obtained. In particular, when the conveyance speed is high, efficient air cooling can be performed in a wide area.

[Details of static eliminator (4)]
FIG. 7 is an explanatory diagram showing, in an enlarged manner, a fourth configuration example in the vicinity of the static elimination unit 210 in the static elimination device 200. A blower unit 220 is disposed above the charge removal unit 210.
As a part different from FIGS. 3 to 6, the sheet conveyance guide 214 is configured such that a part that supports the sheet P (part that contacts the sheet P) conveys the sheet P that is output from the neutralizing roller pair (in FIG. 7). It arrange | positions in the state which protrudes in the broken line (The straight line which tied the roller (not shown) of the center of the static elimination roller pair, and the entrance part of a downstream apparatus).

  FIG. 8 schematically shows a state in which the paper P being conveyed is hooked on the static elimination unit 210 of the static elimination device 200. Here, the sheet P being transported immediately after passing through the pair of neutralizing and neutralizing rollers (the neutralizing rollers 201a and 210b) is in a state where the vicinity of the leading end is supported from below by the sheet conveying guide 214.

  In the case of FIG. 8, since the paper transport guide 214 partially protrudes in the transport path, the paper P is slightly upstream of the paper transport guide 214 compared to the paper transport guide 214 that does not project in the transport path. In contact with each other. Then, the cooling air from the air blowing unit 220 whose direction is adjusted by the air blowing guide 212 hits the leading end portion of the paper P that has passed through the paper guide 214 from above.

  As a result, the sheet P comes into contact with the sheet conveyance guide 214 on the surface, and is pressed against the sheet conveyance guide 214 by the cooling air from above. In other words, the free region without support is reduced, and the vibration during the conveyance of the paper P as described in the related art becomes more difficult to occur.

DESCRIPTION OF SYMBOLS 100 Image forming apparatus 200 Static elimination apparatus 300 Post-processing apparatus

Claims (12)

An image forming unit that forms an image based on image data on a sheet;
A charge eliminating unit configured to include a charge eliminating roller pair that removes the charge remaining on the paper image-formed by the image forming unit;
A guide rail provided on the upper side of the charge removal section, having an opening in the longitudinal direction with the axial direction of the charge removal roller pair as the longitudinal direction;
Arranged on the upper side in the vertical direction of the static elimination unit, a slit-shaped air outlet is provided on the lower side toward the static elimination unit along the opening of the guide rail, and the paper that has passed through the static elimination roller pair is blown An air blowing section for cooling,
The neutralization unit includes a slider that is slidably supported by the guide rail, and is detachable from the image forming apparatus, and includes a sheet conveyance guide that supports the sheet that has passed through the neutralization roller pair. ,
The blower unit includes a blower guide that blows air downstream from the position where the paper transport guide supports the paper in the paper transport direction.
An image forming apparatus. An image forming unit that forms an image based on image data on a sheet;
A charge eliminating unit configured to include a charge eliminating roller pair that removes the charge remaining on the paper image-formed by the image forming unit;
A blower that cools the paper that has passed through the static elimination roller pair of the static elimination unit by blowing;
An image forming apparatus having
The static elimination unit is configured to include a paper conveyance guide that supports the paper that has passed through the static elimination roller pair,
The blower unit includes a blower guide that blows air downstream from the position where the paper transport guide supports the paper in the paper transport direction.
An image forming apparatus. It further comprises a guide rail having an opening in the longitudinal direction with the axial direction of the neutralizing roller pair as the longitudinal direction,
The neutralization unit includes a slider that is slidably supported by the guide rail, and is detachable from the image forming apparatus, and includes a sheet conveyance guide that supports the sheet that has passed through the neutralization roller pair. Configured
The blower unit is arranged on the upper side in the vertical direction of the static eliminator, and has a slit-shaped blower opening along the opening of the guide rail, and the downstream side in the paper transport direction from the position where the paper transport guide supports the paper. And a blowing guide for blowing air,
The image forming apparatus according to claim 2. In the air blowing guide, an area close to a path for conveying the paper is formed of an elastic body.
The image forming apparatus according to claim 1, wherein the image forming apparatus is an image forming apparatus. The paper transport guide is disposed in a state in which a portion supporting the paper protrudes into a transport path for transporting the paper output from the neutralizing roller pair.
The image forming apparatus according to claim 1, wherein the image forming apparatus is an image forming apparatus. The blower guide is configured to include a plurality of blower paths so as to blow air to different positions in the paper conveyance direction.
The image forming apparatus according to claim 1, wherein the image forming apparatus is an image forming apparatus. A static eliminator connected downstream of an image forming apparatus having an image forming unit for forming an image based on image data on a sheet, and receiving the sheet conveyed from the image forming apparatus and neutralizing the sheet;
A charge eliminating unit configured to include a charge eliminating roller pair that removes the charge remaining on the paper image-formed by the image forming unit;
A guide rail provided on the upper side of the charge removal section, having an opening in the longitudinal direction with the axial direction of the charge removal roller pair as the longitudinal direction;
Arranged on the upper side in the vertical direction of the static elimination unit, a slit-shaped air outlet is provided on the lower side toward the static elimination unit along the opening of the guide rail, and the paper that has passed through the static elimination roller pair is blown An air blowing section for cooling,
The neutralization unit includes a slider that is slidably supported by the guide rail, and is detachable from the image forming apparatus, and includes a sheet conveyance guide that supports the sheet that has passed through the neutralization roller pair. ,
The blower unit includes a blower guide that blows air downstream from the position where the paper transport guide supports the paper in the paper transport direction.
A static eliminator characterized by that. A static eliminator connected downstream of an image forming apparatus having an image forming unit for forming an image based on image data on a sheet, and receiving the sheet conveyed from the image forming apparatus and neutralizing the sheet;
A charge eliminating unit configured to include a charge eliminating roller pair that removes the charge remaining on the paper image-formed by the image forming unit;
A blower that cools the paper that has passed through the static elimination roller pair of the static elimination unit by blowing;
Have
The static elimination unit is configured to include a paper conveyance guide that supports the paper that has passed through the static elimination roller pair,
The blower unit includes a blower guide that blows air downstream from the position where the paper transport guide supports the paper in the paper transport direction.
A static eliminator characterized by that. It further comprises a guide rail having an opening in the longitudinal direction with the axial direction of the neutralizing roller pair as the longitudinal direction,
The neutralization unit includes a slider that is slidably supported by the guide rail, and is detachable from the image forming apparatus, and includes a sheet conveyance guide that supports the sheet that has passed through the neutralization roller pair. Configured
The blower unit is arranged on the upper side in the vertical direction of the static eliminator, and has a slit-shaped blower opening along the opening of the guide rail, and the downstream side in the paper transport direction from the position where the paper transport guide supports the paper. And a blowing guide for blowing air,
The static eliminator according to claim 8. In the air blowing guide, an area close to a path for conveying the paper is formed of an elastic body.
The static eliminator according to any one of claims 7 to 9, wherein The paper transport guide is disposed in a state in which a portion supporting the paper protrudes into a transport path for transporting the paper output from the neutralizing roller pair.
The static eliminator according to any one of claims 7 to 10, wherein The blower guide is configured to include a plurality of blower paths so as to blow air to different positions in the paper conveyance direction.
The static eliminator according to claim 7, wherein the static eliminator is characterized in that

Images