JP2013103390A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain suppression of image failure due to a mark of a spur roller in a spur holder regardless of the elapse of the time and to facilitate the replacement of the spur holder.SOLUTION: A pawl-shaped snap fit 209 having elastic force and a boss 210 provided on a part of the snap fit 209 are provided on a part of a housing of the spur holder 205 having spur rollers 206-1 and 206-2. Furthermore, rail-shaped regulating members 212, 213 are provided on a part of the housing of the spur holder 205, and these regulating members 212, 213 regulate the relative position of the spur holder 205 with respect to a paper discharge roller by holding a positioning member provided on a paper discharge roller holding member. The boss 210 is detachably fitted to a mounting hole of a conveyance guide member provided on a position responding to the boss 210 with the elastic force of the snap fit 209. The replacement of the spur holder is facilitated by detaching the boss 210 from the fitting hole when detaching the spur holder 205.

Description

  The present invention relates to an image forming apparatus.

  As a printer, a fax machine, a copier, a plotter, or an image forming apparatus that combines a plurality of these functions, an apparatus described in Patent Document 1 is known. In this image forming apparatus, an image is formed on a sheet conveyed by a sheet conveying unit that adsorbs and conveys the sheet onto a conveying belt, and the sheet after image formation is discharged by a sheet discharging unit.

  The image forming apparatus disclosed in Patent Document 1 includes a spur holder having a spur roller that is supported by an elastic body such as a spring so as to face the paper discharge roller, and the spur roller makes point contact with the paper surface, thereby Paper is discharged with a minimum contact area with the (image surface). Furthermore, the front end of the paper is held by the next roller from the position before entering the spur roller using a moving mechanism constituted by a solenoid, a spring, or the like at a retracting position where the paper is not restricted or a paper restriction position where the paper is restricted. In the meantime, the spur holder is moved to the paper regulation position, and otherwise, the spur holder is moved to the retracted position. This suppresses image defects by reducing the traces of spur rollers while maintaining the application of the necessary conveyance force to the paper.

  However, in the image forming apparatus disclosed in Patent Document 1, the spur holder is moved between the retracted position and the sheet regulating position for each sheet by the moving mechanism. For this reason, there is a possibility that the spur holder may not move to the retracted position and the sheet regulating position due to the deterioration of the solenoid and spring of the moving mechanism with the passage of time. If the spur holder is moved excessively to the paper regulation position, the spur roller will be over-pressurized and contacted with the paper, leaving a trace of the spur roller and suppressing image defects. become unable. In addition, since the spur holder is attached to the moving mechanism by fastening means such as screws, the spur holder must be removed from the moving mechanism, and the spur holder is not easily exchanged. Therefore, it is necessary to disassemble the main body structure, and when the service person visits the user, it is not possible to cope with the replacement of the conveyor belt unit. If it is not possible to respond to the exchange at the visit, it must be taken out and repaired at the repair shop and returned to the user, or the image forming apparatus must be replaced. Occur.

  The present invention has been made in view of the above problems, and an object of the present invention is to form an image that can maintain suppression of image defects due to the marks of spur rollers in the spur holder regardless of time and can easily replace the spur holder. Is to provide a device.

  In order to achieve the above object, the invention of claim 1 forms an image on a sheet by ejecting a recording liquid onto a sheet conveyed by a conveying belt. In the image forming apparatus that is discharged by a spur roller that is supported by an elastic body so as to face the discharge roller, on the side surface portion of the spur holder having the spur roller, the conveyance belt is disposed at a position corresponding to the side surface portion. If a mounting hole is provided in a part of the transport belt holding member that holds the pair of suspended transport rollers or a part of the paper discharge roller holding member that holds the paper discharge roller, a boss that fits in the mounting hole is provided. Or, if a boss is provided on a part of the transport belt holding member or a part of the paper discharge roller holding member, a snap-fit claw having an elastic force having a mounting hole into which the boss fits, and the paper discharge And a defining portion that locks a positioning member provided on a part of the roller holding member or a part of the conveying belt holding member and defines a position of swinging around the boss and the mounting hole. It is characterized by being.

  In the present invention, the spur holder is detachably attached to the discharge roller holding member or the conveyance belt holding member by a snap-fit claw provided on a side surface portion of the spur holder and a defining portion. The conveying belt holding member and the paper discharge roller holding member are accurately positioned in the apparatus. This is because the relative position between the belt surface of the transport belt and the roller surface of the paper discharge roller is strictly defined in order to smoothly transport the paper after image formation transported by the transport belt to the paper discharge roller side. In this manner, the spur holder is detachably attached to the conveyance belt holding member or the discharge roller holding member that is accurately positioned in the apparatus, so that the paper conveyed from the spur roller of the spur holder and the conveyance belt to the discharge roller. The relative position is accurately defined. Therefore, the spur roller can maintain the application of a stable conveyance force to the paper and can reduce the trace of the spur roller to a minimum, thereby suppressing image defects regardless of the time. And since it can be attached and detached by deforming the snap-fitting claw, unlike the image forming apparatus of Patent Document 1, the spur holder can be easily replaced without the need for releasing the fastening of fastening means such as screws.

  According to the present invention, it is possible to maintain the suppression of image defects due to the marks of spur rollers in the spur holder regardless of time, and to obtain a unique effect that the spur holder can be easily replaced.

It is the perspective view which looked at the inkjet recording device from the front. It is a side view which shows the outline | summary of the mechanism part of an inkjet recording device. It is a top view which shows the principal part of the mechanism part of an inkjet recording device. FIG. 3 is a side view illustrating a configuration of a paper transport unit and a paper discharge unit of the inkjet recording apparatus. It is a side view of a spur holder. It is a bottom view of a spur holder. It is the elements on larger scale which show a mode that the regulation member of the spur holder was fitted with the positioning member of the discharge roller holding member. It is the schematic which shows the mode of discharge. It is the schematic which shows a mode that a spur holder is removed. It is a side view which shows another structural example of a spur holder.

Hereinafter, an embodiment in which the image forming apparatus of the present invention is applied to an ink jet recording apparatus that forms an image on a recording medium by ejecting ink will be described.
FIG. 1 is a perspective view of the ink jet recording apparatus as viewed from the front. The ink jet recording apparatus 100 shown in FIG. 1 includes an apparatus main body 101, a paper feed tray 102 for loading paper mounted on the apparatus main body 101, and a detachably mounted on the apparatus main body 101 to record (form) an image. A paper discharge tray 103 for stocking the used paper. Further, a cartridge loading for loading an ink cartridge that protrudes from the front surface to the front side of the apparatus main body 101 and is lower than the upper surface is provided at one end of the front surface of the apparatus main body 101 (side of the paper supply / discharge tray section). The cartridge loading unit 104 is provided with an operation / display unit 105 such as operation buttons and a display. As an image forming apparatus here, for example, there is an ink jet recording apparatus that includes a liquid ejection head that ejects ink droplets and forms an image by adhering ink droplets to a sheet while conveying a medium.

  The cartridge loading unit 104 contains a plurality of recording liquids (inks) that are different color materials, such as black (K) ink, cyan (C) ink, magenta (M) ink, and yellow (Y) ink. Ink cartridges 110k, 110c, 110m, and 110y (referred to as “ink cartridge 110” when the colors are not distinguished) are recording liquid cartridges serving as recording liquid storage units from the front side to the rear side of the apparatus main body 101. A front cover (cartridge cover) 106 that is opened when the ink cartridge 110 is attached or detached is provided on the front side of the cartridge loading unit 104 so as to be openable and closable. Further, the ink cartridges 110k, 110c, 110m, and 110y are configured to be loaded side by side in the horizontal direction in a vertically placed state.

  Further, the operation / display unit 105 has the remaining amounts of the ink cartridges 110k, 110c, 110m, and 110y for the respective colors at the arrangement positions corresponding to the installation positions (arrangement positions) of the ink cartridges 110k, 110c, 110m, and 110y for the respective colors. The remaining amount display sections 111k, 111c, 111m, and 111y for each color for displaying the near end and the end are arranged. Further, the operation / display unit 105 is also provided with a power button 112, a paper feed / print resume button 113, and a cancel button 114.

  Next, the mechanism part of the ink jet recording apparatus will be described with reference to FIGS. 2 is a side view showing an outline of a mechanism part of the ink jet recording apparatus, and FIG. 3 is a plan view showing a main part of the mechanism part of the ink jet recording apparatus.

  In the mechanism of the ink jet recording apparatus, the carriage 133 is slidably held in the main scanning direction by a guide rod 131 and a stay 132 which are guide members horizontally mounted on the left and right side plates 121A and 121B constituting the frame 121. The main scanning motor that is not moved moves and scans in the bidirectional carriage main scanning direction indicated by the arrow in FIG. 3 via the timing belt.

  Here, the inkjet head constituting the droplet discharge head 134 includes a piezoelectric actuator such as a piezoelectric element, a thermal actuator that uses a phase change caused by liquid film boiling using an electrothermal transducer such as a heating resistor, and a temperature change. It is possible to use a shape memory alloy actuator that uses a metal phase change due to the above, an electrostatic actuator that uses an electrostatic force, and the like as pressure generating means for generating pressure for discharging droplets.

  As shown in FIG. 3, a driver IC is mounted on the droplet discharge head 134 and is connected to a control unit (not shown) via a harness (flexible print cable) 122. The carriage 133 is equipped with a head tank 135 for each color for supplying ink of each color to the droplet discharge head 134. Each color head tank 135 is supplementarily supplied with ink of each color from the ink cartridges 110y, 110m, 110c, and 110k of each color mounted in the cartridge loading unit 104 via the ink supply tube 136 for each color. The cartridge loading 104 is provided with a supply pump unit 124 for feeding the ink in the ink cartridge 110, and the ink supply tube 136 is engaged with the rear plate 121 </ b> C constituting the frame 121 during the scooping operation. It is held at.

  On the other hand, as a paper feeding unit for feeding the paper 142 stacked on the paper stacking unit (pressure plate) 141 of the paper feed tray 102 in FIG. 2, half a month in which the paper 142 is separated and fed one by one from the paper stacking unit 141. A separation pad 144 made of a material having a large coefficient of friction is provided opposite to the roller (sheet feeding roller) 143 and the sheet feeding roller 143, and the separation pad 144 is urged toward the sheet feeding roller 143 side.

  In order to feed the sheet 142 fed from the sheet feeding unit to the lower side of the droplet discharge head 134, a guide member 145 that guides the sheet 142, a counter roller 146, a transport guide member 147, and a tip addition member. A pressing member 148 having a pressure roller 149, and a conveying belt 151 that is a conveying means for electrostatically attracting the fed sheet 142 and conveying it at a position facing the droplet discharge head 134. .

  The conveyor belt 151 is an endless belt, and is configured to wrap around the conveyor roller 152 and the tension roller 153 and circulate in the belt conveyance direction (sub-scanning direction). Further, a charging roller 156 that is a charging unit for charging the surface of the transport belt 151 is provided. The charging roller 156 is disposed so as to come into contact with the surface layer of the conveyor belt 151 and to rotate following the rotation of the conveyor belt 151. Further, a guide member 157 is disposed on the back side of the conveyance belt 151 so as to correspond to a printing area by the droplet discharge head 134.

  The transport belt 151 rotates in the belt transport direction of FIG. 3 when the transport roller 152 is rotationally driven through timing by a sub-scanning motor (not shown).

  Further, as a paper discharge unit for discharging the paper 142 recorded by the droplet discharge head 134, a separation claw 161 for separating the paper 142 from the transport belt 151, a paper discharge roller 162, and a paper discharge roller 163, And a paper discharge tray 103 below the paper discharge roller 162.

  A double-sided unit 171 is detachably attached to the back surface of the apparatus main body 101. The duplex unit 171 takes in the paper 142 returned by the reverse rotation of the transport belt 151, reverses it, and feeds it again between the counter roller 146 and the transport belt 151. The upper surface of the duplex unit 171 is a manual feed tray 172.

  Further, as shown in FIG. 3, a maintenance / recovery mechanism 181 including a recovery means for maintaining and recovering the nozzle state of the droplet discharge head 134 is arranged in the non-printing area on one side of the carriage 133 in the scanning direction. doing.

  The maintenance / recovery mechanism 181 includes cap members (hereinafter referred to as “caps”) 182a to 182d (hereinafter referred to as “caps 182” when not distinguished) for capping each nozzle surface of the droplet discharge head 134. A wiper blade 183 that is a blade member for wiping the nozzle surface, an empty discharge receiver 184 that receives droplets when performing an empty discharge that discharges droplets that do not contribute to recording in order to discharge the thickened recording liquid, and the like It has. Here, the cap 182a is a suction and moisture retention cap, and the other caps 182b to 182d are moisture retention caps.

  Then, the waste liquid of the recording liquid generated by the maintenance / recovery operation by the maintenance / recovery mechanism 181, the ink discharged to the cap 182, the ink attached to the wiper blade 183 and removed by the wiper cleaner 185, and the idle ejection to the idle ejection receptacle 194 The discharged ink is discharged and stored in a waste liquid tank (not shown).

  Further, as shown in FIG. 3, in the non-printing area on the other side in the scanning direction of the carriage 133, idle discharge is performed to discharge liquid droplets that do not contribute to recording in order to discharge the recording liquid thickened during recording or the like. An empty discharge receiver 188 for receiving the droplets at the time is disposed, and the empty discharge receiver 188 is provided with an opening 189 along the nozzle row direction of the droplet discharge head 134.

  In the ink jet recording apparatus configured as described above, the paper 142 is separated and fed one by one from the paper feed tray 102, and the paper 142 fed substantially vertically upward is guided by the guide 145, and the transport belt 151 and the counter roller 146, and the leading end is guided by the conveying guide 137 and pressed against the conveying belt 151 by the leading end pressing roller 149, and the conveying direction is changed by approximately 90 °.

  At this time, a charging voltage pattern in which a positive output and a negative output are alternately repeated from the AC bias supply unit of the control unit, which will be described later, to the charging roller 156 alternately, that is, an alternating voltage is applied and the conveying belt 151 is alternating. That is, plus and minus are alternately charged in a band shape with a predetermined width in the sub-scanning direction which is the circumferential direction. When the sheet 142 is fed onto the conveying belt 151 that is alternately charged with plus and minus, the sheet 142 is attracted to the conveying belt 151, and the sheet 142 is conveyed in the sub-scanning direction by the circumferential movement of the conveying belt 151.

  Therefore, ink droplets are ejected onto the stopped paper 142 by driving the droplet ejection head 134 according to the image signal while moving the carriage 133 in the main scanning direction based on the main scanning position information by the linear encoder 137. Then, one line is recorded, and after the sheet 142 is conveyed by a predetermined amount, the next line is recorded. Upon receiving a recording end signal or a signal that the trailing edge of the sheet 142 has reached the recording area, the recording operation is terminated and the sheet 142 is discharged onto the discharge tray 103.

  During printing (recording) standby, the carriage 133 is moved to the maintenance / recovery mechanism 181 side, and the droplet discharge head 134 is capped by the cap 182 to keep the nozzles in a wet state, thereby preventing discharge failure due to ink drying. To prevent. In addition, with the cap 182 capping the droplet discharge head 134, the recording liquid is sucked from the nozzle by a suction pump (not shown) (referred to as "nozzle suction" or "head suction"), and the thickened recording liquid and bubbles are discharged. Perform recovery action. In addition, an idle ejection operation for ejecting ink not related to recording is performed before the start of recording or during recording. Thereby, the stable ejection performance of the droplet ejection head 134 is maintained.

  FIG. 4 is a side view illustrating the configuration of the paper transport unit and the paper discharge unit of the inkjet recording apparatus. The conveyance belt guide member 201 holds a conveyance roller 202 and a tension roller 203. A conveyor belt 204 is stretched between the conveyor roller 202 and the tension roller 203. Further, a spur holder 205 is provided as a paper discharge unit on the downstream side in the paper conveyance direction indicated by an arrow in FIG. As shown in FIG. 5 which is a side view of the spur holder and FIG. 6 which is a bottom view of the spur holder 205, spur rollers 206-1 and 206 which are supported by an elastic body such as a spring (not shown). -2 are provided in two rows in a direction orthogonal to the paper discharge direction. The roller tip of the spur roller 206-2 is positioned below the roller tip of the spur roller 206-1. The spur roller 206-1 is provided at a position substantially opposite to the end of the conveyance belt 204 in the paper discharge direction, and the spur roller 206-2 is provided at a position opposite to the paper discharge roller 207.

  Further, as shown in FIG. 7, which is a partially enlarged view showing a state in which the spur holder defining member is engaged with the positioning member of the paper discharge roller holding member, the spur holder 205 has an engagement portion with the conveyance belt guide member 201. In addition to the cylindrical boss 210 provided on the side surface of the snap fit 209, rail-shaped defining members 212 and 213 as fitting portions with the positioning member 214 of the discharge roller holding member 212 in the front (downstream side) in the transport direction. Is provided. The two defining members 212 and 213 are loaded along each surface while sandwiching the upper surface portion and the lower surface portion of the positioning member 214 of the paper discharge roller holding member 208 provided on the conveyance belt guide member 201. That is, the spur holder 205 is defined at a position parallel to the axial direction of the spur roller. The attachment position of the discharge roller holding member 208 is a position that defines the height direction position of the spur holder 205. For this reason, the position of the spur holder 205 in the height direction is regulated by the two defining members 212 and 213 sandwiching the positioning member 214 of the discharge roller holding member 208. The discharge roller holding member 208 defines the position of the spur holder 205 in the vertical direction in the figure. Then, the position of the spur holder by the discharge roller holding member 208 in the vertical direction in the figure is stabilized. As a result, the pressure of the spur roller against the paper discharge roller is stabilized. In addition, as shown in FIG. 7, it is easy to attach the defining member 212 to the positioning member 214 of the discharge roller holding member 208 by making the tip of the defining member 212 have a tapered shape. In this embodiment, the boss 210 is provided on the side surface of the snap fit 209 and the attachment hole 211 is provided on the side surface portion of the conveyance belt guide member 201. However, the attachment hole 211 is provided on the side surface of the snap fit 209. You may provide the boss | hub 210 in the side part.

  And as shown to (a) of FIG. 8, (b), the spur roller 206-1 makes the front-end | tip part of the paper P which protruded in the space from the edge part of the conveyance belt 204 orient | assign downward. Further, the sheet P is conveyed, and the sheet P is guided between the spur roller 206-2 and the paper discharge roller 207 by contacting the spur roller 206-2. As shown in FIG. 4, the spur holder 205 is fixed by a conveyance belt guide member 201 and a discharge roller support member 208. As shown in FIG. 6, the fixing method is a cylindrical shape provided at a part of the claw-shaped snap fit 209 provided at both ends orthogonal to the paper discharge direction of the spur holder 205 as shown in FIG. 6. The boss 210 and the mounting hole 211 provided in the side surface portion of the conveyor belt guide member 201 are fitted to each other to be fitted together. By having such a structure, attachment and detachment at the time of replacement | exchange of a spur holder can be performed easily. Specifically, the boss 210 is removed from the attachment hole 211 as shown in FIGS. Then, the position is moved from the position indicated by the dotted line to the position indicated by the solid line in FIG. Specifically, the spur holder 205 is moved in the direction opposite to the conveying direction in the space extending above the conveying belt 204 by removing the carriage existing above the conveying belt 204 or moving the carriage to the standby position. Slide it up and lift it up. By making the spur holder detachable as described above, for example, when the ink drips on the conveyance path or the conveyance belt is scratched during jam processing, the conveyance belt unit can be replaced more easily. . In this case, the carriage 133 mounted with the ink jet recording head above the transport belt unit is removed from the guide rod. And the spur holder 205 which exists in a part of space which takes out a conveyance belt unit like the above is taken out. Each boss 210 of the spur holder 205 is removed from the attachment hole 211, and the spur holder 205 is taken out. Thereby, there is no obstacle in the space for taking out the conveyor belt unit, and the conveyor belt unit can be easily attached and detached. In addition, it is possible to replace the spur holder alone, and it is possible to customize by replacing the spur roller according to the paper thickness used by the user.

  FIG. 10 is a schematic view showing another configuration example of the spur holder. In the figure, the same reference numerals as those in FIG. 5 denote the same components. In the spur holder 205 shown in FIG. 10, both the snap fit 209 and the rail-shaped defining members 212 and 213 are detachably fitted only to the conveying belt guide member 201. That is, the mounting hole 211 and the positioning member 214 are provided in the conveyance belt guide member 201, the boss 210 of the snap fit 209 is fitted into the mounting hole 211, and the positioning member 214 is sandwiched between the defining members 212 and 213. The gap between the nozzle surface of the recording head and the belt surface of the conveying belt is strictly defined because it relates to the ejection performance. Therefore, the conveyor belt guide member 201 that holds the conveyor belt is installed with high accuracy. The conveyor belt guide member 201 is accurately positioned in the apparatus. The relative position between the belt surface of the conveyor belt and the roller surface of the sheet discharge roller is strictly defined in order to smoothly convey the sheet after image formation conveyed by the conveyor belt to the sheet discharge roller side. By fitting the spur holder 205 to the conveying belt guide member 201 so as to be detachable, the relative position between the spur holder 205 and the recording head or the discharge roller 207 is improved. Further, h1 in the figure of the gap between the carriage 133 on which the recording head is positioned and mounted and the spur holder 205 can be defined to a predetermined value. Therefore, the height of the recording head and the paper entry portion of the spur holder (height h2 in FIG. 10) can be increased as much as possible. As a result, as shown in FIG. 10, an opening can be provided as large as possible between the paper guide surface 215 having a tapered shape and the belt surface of the conveyor belt, and the leading edge of the paper is formed between the spur holder 205 and the carriage 133. Therefore, the discharged paper can be smoothly guided to the spur roller 206-1.

What has been described above is merely an example, and the present invention has a specific effect for each of the following modes.
(Aspect A)
A paper discharge roller that holds a part of a conveyance belt holding member that holds a pair of conveyance rollers that suspend a conveyance belt at a side surface portion of a spur holder that has a spur roller, and that is a position corresponding to the side surface portion. When a mounting hole is provided in a part of the holding member, a boss that fits into the mounting hole, or a boss is attached to a part of the conveyance belt holding member or a part of the discharge roller holding member The snap fit claw having an elastic force having a mounting hole in which the boss fits, and a positioning member provided on a part of the discharge roller holding member or a part of the conveying belt holding member are engaged to fix the boss and the mounting hole. And a defining portion that defines a position of swinging around. According to this, as described in the above embodiment, the spur holder 205 is attached to the discharge roller holding member 208 or the conveyance guide member 201 by the snap-fit claw 209 provided on the side surface portion of the spur holder 205 and the defining portion. Removably attached. The conveyance guide member 201 and the discharge roller holding member 208 are accurately positioned in the apparatus. This is because the relative position between the belt surface of the conveyance belt 204 and the roller surface of the paper discharge roller 207 is strictly defined in order to smoothly convey the sheet after image formation conveyed by the conveyance belt 204 to the paper discharge roller side. In this manner, the spur holder 205 is detachably attached to the transport guide member 201 or the discharge roller holding member 208 that is accurately positioned in the apparatus, so that the spur rollers 206-1 and 206-2 of the spur holder 205 are transported. The relative position with respect to the sheet conveyed from the belt 204 to the sheet discharge roller 207 is accurately defined. Therefore, the spur roller can maintain the application of a stable conveying force to the paper, and the trace of the spur roller can be reduced to the minimum, so that image defects can be suppressed regardless of time. And since it can attach and detach by deform | transforming a snap fitting nail | claw, the replacement | exchange of a spur holder can be easily performed without requiring the effort of cancellation | release etc. of fastening of fastening means, such as a screw unlike the said patent document 1. FIG.
(Aspect B)
In (Aspect A), the defining portion includes a clamping member that has a rail shape and clamps the positioning member. According to this, as described in the above embodiment, the rail-shaped defining members 212 and 213 that are the clamping members are provided on the conveyance guide member 201 and the upper surface portion of the positioning member 214 that is a member extending in the longitudinal direction. It is loaded along each surface while sandwiching the lower surface portion. Since the mounting position of the positioning member 214 is a position that defines the position in the height direction of the spur holder, the two rail-shaped defining members 212 and 213 are attached to the positioning member 214, so that the height direction of the spur holder is increased. Can be regulated.
(Aspect C)
In (Aspect B), the rail-shaped holding member is slid in the transport direction along the rail shape, and the spur holder is attached and detached. According to this, as described in the above embodiment, the spur holder can be easily attached and detached without disassembling the apparatus housing by sliding in the transport direction.

DESCRIPTION OF SYMBOLS 100 Inkjet recording device 201 Conveying guide member 202 Conveying roller 203 Tension roller 204 Conveying belt 205 Spur holder 206-1 Spur roller 206-2 Spur roller 207 Discharge roller 208 Discharge roller holding member 209 Snap fit 210 Boss 211 Mounting hole 212 Member 213 Regulation member 214 Positioning member 215 Paper guide surface

JP 2006-301335 A

Claims (3)

The recording liquid is ejected onto the paper transported by the transport belt to form an image on the paper. The image-formed paper is a paper roller and a spur roller supported by the elastic body facing the paper discharge roller. In the image forming apparatus discharged by
In the side part of the spur holder having the spur roller,
A mounting hole is formed in a part of a conveying belt holding member that holds a pair of conveying rollers that suspend the conveying belt at a position corresponding to the side surface part or a part of a discharging roller holding member that holds the discharging roller. A boss that fits into the mounting hole, or a mounting hole into which the boss fits when part of the transport belt holding member or part of the paper discharge roller holding member is attached. Snap-fit nails with elastic force having,
A positioning portion that locks a positioning member provided on a part of the paper discharge roller holding member or a part of the transport belt holding member to define a swing position around the boss and the mounting hole; An image forming apparatus comprising the image forming apparatus. The image forming apparatus according to claim 1.
The image forming apparatus according to claim 1, wherein the defining portion has a rail shape and includes a clamping member that clamps the positioning member. The image forming apparatus according to claim 2.
An image forming apparatus, wherein the rail-shaped holding member is slid in a conveying direction along the rail shape to attach and detach the spur holder.

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