JP4760085B2 - Air spray cleaning device and image forming apparatus using the same - Google Patents

Description

  The present invention relates to an air blowing cleaning device that blows air to a long object that needs to suppress adhesion of floating substances at least in the long direction, and a printer, a copier, a multifunction machine, and the like using the same Related to the image forming apparatus

  In general, in an image forming apparatus that forms an image made of toner (powder developer) on a sheet-like recording medium such as recording paper using an electrophotographic method, an electrostatic recording method, or the like, Some devices use a corona discharge device for a static elimination process, a toner image transfer process, a charging process of a belt for conveying a recording sheet, a peeling process, and the like.

  For example, in an image forming apparatus in which such a corona discharge device is used, uneven discharge occurs when floating particles such as paper dust or toner floating in the device housing adhere to the discharge wire of the corona discharge device. For example, it is difficult to uniformly charge the photoconductor. In addition, since discharge products such as ozone are generated around the discharge wire, oxides easily grow on the surface of the discharge wire due to the ozone, and this also causes uneven discharge.

  For this reason, conventionally, air is blown toward the discharge wire of the corona discharge device to prevent as much as possible floating particles such as toner from adhering, and the discharge product is blown away from the periphery of the discharge wire. It was like that. However, if the air to be blown is not blown uniformly in the longitudinal direction along the discharge wire of the corona discharge device, the discharge wire is locally contaminated or oxidized corresponding to the weak air flow portion. Also, there was a problem that uneven discharge occurred over time.

  In order to solve such a problem, the following countermeasures are known.

  For example, as an image forming apparatus having a blowing unit that blows air toward a photosensitive member between a charge eliminating unit and a charging unit, the axial direction of the photosensitive member in a duct for sending air obtained from a blowing fan of the blowing unit There is a proposal of an image forming apparatus in which fins that are made uniform over the (longitudinal direction) are provided so that the amount of air blown in the axial direction of the photosensitive member is made uniform (Patent Document 1).

  In addition, as a corona discharge device that is a patent application by the present applicant and blows air from a blower fan through a duct toward a discharge wire or the like in the shield case, the duct is partitioned along the longitudinal direction of the shield case in the duct. A wall is set up so that the pressure of the air flow blown into the shield case is temporarily increased on the front side of the partition wall so that the air flow is uniform along the longitudinal direction. There is a proposal of a corona discharge device designed to be realized (Patent Document 2).

Japanese Patent No. 2632815 JP-A-10-198128

  However, in the former countermeasure means, air from the blower fan is made uniform by fins provided in the duct and then blown from the opening of the duct to the photosensitive drum. As illustrated in FIG. The air flow strength (unevenness) substantially corresponds to a certain portion of the fins 02 (see the wind distribution curve shown by the solid line in the figure). That is, the wind force of the airflow that flows so as to collide with the fins 02 becomes relatively stronger than the amount of airflow of the airflow that flows in the other state. Further, this causes a problem that unevenness of dirt occurs on the photosensitive member and the charger. Reference numeral 03 in the figure indicates a blower fan, and a dotted arrow indicates the flow of air.

  Further, in the latter countermeasure means, the pressure loss occurs because the pressure of the air flow in the duct is temporarily increased by the partition wall, so that the air volume finally blown to the discharge wire or the like is reduced. There were difficulties. In this case, a measure to increase the blowing capacity of the blower fan in order to secure the air volume can be considered, but in this case, the power consumption of the blower fan increases or the noise during the blowing also increases. A new problem will occur.

  The present invention has been made in view of the circumstances as described above, and allows air to flow in the longitudinal direction of a long object to be cleaned without causing a significant increase in electric power or noise and incurring almost no pressure loss. In addition to providing an air spray cleaning device that can be sprayed as evenly as possible to prevent the floating object of the cleaning object from adhering in an uneven state, It is an object of the present invention to provide an image forming apparatus capable of preventing image quality unevenness due to adhesion in a certain state.

The air blowing cleaning device of the present invention is an air blowing cleaning device that blows air against a long object that needs to suppress at least the attachment of suspended matter to the long direction,
A blower duct having a hollow structure in which a long air blowing port facing the long cleaning target portion of the object is opened on one end side, and a blower fan for blowing air into the hollow inside of the blow duct, A plurality of flow paths extending in front of the air blowing port into the hollow interior of the blowing duct so that the air of the blowing fan is distributed and blown out from the regions divided at intervals in the longitudinal direction of the air blowing port. A plurality of partition plates provided for forming and at the air outlet side tip of the plurality of partition plates, flow along each flow path formed by each partition plate and pass at least near the partition plate. The air direction change adjusting means for adjusting the air direction immediately before flowing out by changing continuously or intermittently is provided.

  The said wind direction change adjustment means can be comprised by the film member which is attached to the air blower outlet side front-end | tip part of each partition plate, and shakes with the flow of the air sent out, for example.

  Moreover, the said wind direction change adjustment means can also be comprised with the movable plate which can change the direction of the air sent out in the front-end | tip part of the air outlet side of each partition plate by the state change of a plate surface. The movable plate may be configured to be movable with power from a predetermined driving means so that the state of the plate surface can be changed by, for example, rocking motion, rotational motion, linear motion, or the like.

  The image forming apparatus of the present invention is an apparatus that forms an image on a sheet-like recording medium, and is a long component that needs to suppress at least adhesion of floating substances among components used for the image formation. Further, as an apparatus for blowing air in the longitudinal direction, an air blowing cleaning apparatus having any one of the above-described configurations is used. Examples of the component include a corona discharge device and an image exposure device.

  According to such an air blowing cleaning device, the air from the blower fan is distributed through each flow path formed by the plurality of partition plates of the blower duct, and finally the long object to be cleaned from the air outlet Sprayed against the site. At this time, the direction of the air just before flowing out through at least the vicinity of the partition plate by being sent through each flow path in the air duct by the air direction change adjusting means installed at the air outlet side tip of the plurality of partition plates Are adjusted by changing continuously or intermittently.

As a result, air can be blown evenly continuously or intermittently in the longitudinal direction of the long object to be cleaned, and the air flow is fixed according to the portions corresponding to the plurality of partition plates of the air duct. The strength (unevenness) is not generated, and the fixed strength of the air flow is a factor, and the floating object is prevented from adhering to the cleaning object in an uneven state. When the air direction is changed intermittently by the wind direction changing adjusting means, the air blowing is averaged over a certain period of time, and the occurrence of uneven dirt is prevented.

  In addition, the wind direction change adjusting means is such that it changes the direction of the air immediately before flowing out along at least the vicinity of the partition plate along the respective flow paths, so that there is no pressure loss. Will not drop. Furthermore, since it is not necessary to increase the blowing capacity of the blower fan, an increase in electric power and noise caused thereby is not induced.

When the wind direction change adjusting means is constituted by the film member as described above, the direction of the air immediately before flowing out through the vicinity of the partition plate is swung in the direction in which the film member swings by the flow of the air sent out. Will be changed accordingly. Thus, fixed intensity of the air flow is eliminated occurs in accordance with the region corresponding to the partition plate. Further, in the case of this configuration, driving means for swinging and moving the film member is unnecessary.

When the wind direction change adjusting means is composed of a movable plate as described above, the direction of the air just before flowing out through the vicinity of the partition plate fluctuates when the movable plate changes the state of the plate surface. It changes according to the direction. Thus, fixed intensity of the air flow is eliminated occurs in accordance with the region corresponding to the partition plate. In the case of this configuration, the state of occurrence of dirt can be arbitrarily controlled by moving the partition plate in a planned manner.

And according to the image forming apparatus using such an air blowing cleaning device, it is a long component that needs to suppress at least the adhesion of floating substances among the long components used for image formation. against air can the blown continuously or intermittently evenly and eliminates fixed intensity of the air flow (unevenness) occurs in accordance with the region corresponding to a plurality of partition plates of the air duct, fixed the air flow It is possible to prevent the floating parts from adhering to the component parts in an uneven state due to the dynamic strength. Thereby, unevenness in image quality does not occur in the longitudinal direction of an image obtained by involving such components.

<Embodiment 1>
1 and 2 show a first embodiment of the present invention, and FIG. 1 is a schematic explanatory view showing a main part of an image forming apparatus to which an air blowing cleaning device according to the first embodiment is applied. FIG. 2 is a perspective view mainly showing the air spray cleaning device.

  An image forming apparatus 100 shown in FIG. 1 is an image forming apparatus that finally forms an image made of toner on a recording sheet using an electrophotographic system, an electrostatic recording system, or the like. In such an image forming apparatus 100, a corona discharge charging device 120 that basically charges a photosensitive drum 110 uniformly by corona discharge around a photosensitive drum 110 rotating in the direction of an arrow in an apparatus housing (not shown). And an image exposure device 130 such as an LED array method or a laser beam method that irradiates the charged photosensitive drum 110 with light (H) according to image information to form a latent image, and the latent image is developed with toner (development). A developing device 140 that forms a toner image by developing the toner image, a transfer device 150 that transfers the toner image to the recording paper P or the intermediate transfer body 180, and a cleaning device that cleans the surface of the photosensitive drum 110 after the transfer. 160 is mainly installed.

  When the intermediate transfer member 180 is used, a secondary transfer device for transferring the toner image transferred to the intermediate transfer member to the recording paper P is installed. Further, a fixing device (not shown) for performing a process of fixing the toner image on the recording paper is installed on the downstream side of the transfer portion of the toner image onto the recording paper P.

  In the image forming apparatus 100, since floating substances such as toner and paper dust are floating in the apparatus housing particularly during an image forming operation, these floating substances are discharged in the corona discharge charging device 120. In order to suppress or prevent adhesion to 122 or the grid 123 that rectifies the charge of corona discharge, the charging device 120 is used with the air spray cleaning device 1A attached thereto.

  As shown in FIG. 2 and the like, the air blowing cleaning device 1A has one end of an air blowing port 15 facing a long rectangular upper surface opening 121a provided in a rectangular shield case 121 of the charging device 120. The blower duct 10 formed in the section and the blower fan 20 for blowing air outside the image forming apparatus 1 into the hollow inside of the blower duct 110 are provided.

  The air duct 10 includes a rising body 11 that rises upward from an end portion where the air outlet 15 is formed, and a horizontal body 12 that is bent and extends in an L shape so as to bend in the horizontal direction from the rising body 11. An extension body portion 13 is formed at one end portion of the horizontal body portion 12 so as to further protrude toward the end portion side. An end of the extension body 13 is open, and a dustproof filter 25 is attached to the opening. A mounting portion 14 for the blower fan 20 is formed slightly inside the opening of the extension body 13. The duct extension body 13 is formed, for example, up to a part of the main body housing of the image forming apparatus 100, and is configured such that the dustproof filter 25 is exposed to the outside.

  Further, the air duct 10 has its air blown into the duct hollow so that the air of the blower fan 20 is distributed and blown out from the regions E1 to E6 which are divided at intervals in the longitudinal direction of the air blowout port 15. A plurality of partition plates 40 to 44 for forming a plurality of flow paths (J1 to J6) extending to the front of the mouth 15 are provided.

  The partition plates 40 to 44 are distributed so as to equally divide the internal space of the duct body from the position slightly inside the blower fan 20 to the horizontal body 12 in the extension body 13 of the air duct 10. The straight plate portions 40a to 44a to be formed and the rising trunk portion 11 of the duct are formed so as to extend to the front of the air outlet 15 so that the regions E1 to E6 are substantially equally divided. The vertical plate portions 40b to 44b, and the straight plate portions 40a to 44a and the vertical plate portions 40b to 44b are bent and connected so as to gradually expand toward the vertical plate portion side. Connecting curved plate portions 40c to 44c. Reference numeral 45 in the drawing is an outermost partition plate (wall) that also serves as an outer frame of the duct 10. In addition, the form of the flow path formed by this partition plate is not limited to the configuration of this example. Moreover, the form of the flow path can be appropriately changed depending on the installation position of the blower fan 20 and the like.

  Furthermore, it installs in the front-end | tip part used as the air blowing port 15 side of the some partition plates 40-44 of the ventilation duct 10, and flows along each flow path (J1-J6) formed with each of the partition plates, and at least each Wind direction change adjusting means 50A is provided that adjusts the direction of the air (dotted arrow) immediately before flowing out through the vicinity of the partition plates (40c to 44c) by changing continuously or intermittently.

  The wind direction change adjusting means 50A in this example is provided at the tip of each partition plate (40c to 44c) on the air outlet 15 side (the end of the partition plate located at a predetermined distance from the outlet 15 into the duct 10). A film member 51 having a thickness of about 25 μm to 100 mm that can be oscillated (elastically deformed) by the flow of air is attached to the blowout port 15 in a suspended state. The film member 51 is made of a synthetic resin or the like (for example, Mylar), and is formed in a size and shape such that a partition plate extends to the air outlet 15. Further, in order to make the film member 51 easily sway by the force of the air flow sent from the duct 10 toward the air blowing port 15, as shown in the upper part of FIG. Are formed so that there are a plurality of strips.

  Incidentally, if the film member 51 can be sufficiently shaken by the air flow, it is not necessary to take measures against the slit slit 51a. On the contrary, the film member 51 is not limited to the case where the slit slit 51a is formed, but from the viewpoint of swaying with the length of the air and facilitating the delicate change of the air flow. A plurality of cutouts 51b may be formed at the lower end of the lens to form an irregular lower end shape that slightly disturbs air rectification.

  Hereinafter, the air blowing operation by the air blowing cleaning apparatus 1A provided with the air direction change adjusting means 50A made of such a film member 51 will be described.

  First, the blower fan 20 in the air blowing cleaning device 1 is rotationally driven in conjunction with the image forming operation of the image forming apparatus 100. As a result, as shown in FIG. 3 and the like, the air (S) outside the image forming apparatus 100 passes through the dust-proof filter 25 at an amount and speed according to the blowing capacity of the blower fan 20. It is blown into the horizontal body 12 side and further toward the rising body 11 side. The air (S) blown into the blower duct 10 is distributed to the flow paths (J1 to J6) formed by the partition plates 40 to 44 (45) in the internal space of the duct 10. Each is sent toward the air outlet 15.

  Subsequently, the air (S) sent through the respective flow paths (J1 to J6) in the blower duct 10 is finally divided by the partitions 40b to 44b through the duct rising trunk portion 11 as shown in FIG. The air is blown out toward the charging device 120 for each divided area (E1 to E6) of the divided air outlet 15.

  At this time, as shown in FIG. 4, a part of the air (S) passes while touching the film member 51 in the wind direction change adjusting means 50 </ b> A before being blown out from the air blowing port 15. At this time, as illustrated in FIG. 4, the film member 51 is caused by the force of the air flow passing therethrough (which often becomes an air flow that flows with strength based on the number of rotations of the fan and the number of fan blades). The charging device 120 naturally oscillates in the longitudinal direction A (corresponding to the tensioning direction of the discharge wire 122) (the state shown by reference numerals 51 ′ and 51 ″). As the film member 51 swings, the direction of air immediately before flowing out along at least the vicinity of the partition plates 40b to 44b is changed along the flow paths (J1 to J6).

  That is, when the film member 51 is in a state where it hangs down flatly as shown by a solid line in FIG. 4, for example, the air (S) flowing through the flow path J3 is a vertical shape that forms the flow path J3. It flows in a state (wind direction indicated by symbol Sa) that is directed almost directly along the partition plate 42 (b) and blows out from the region E3 of the air outlet 15 (Sa). If this state continues and is fixed, as described in the prior art, the strength of the air blown out in the vicinity of the partition plate is generated and the blowing state becomes uneven (see the wind distribution curve shown by the solid line in FIG. 13).

  On the other hand, when the film member 51 is in a state in which the lower end side thereof sways into the adjacent air outlet 15 region E4 side like a film member 51 ′ shown by a two-dot chain line in FIG. The air (S) flowing through the flow path J3 flows in a direction almost directly along the vertical partition plate 42 (b) forming the flow path J3, and finally flows in the direction in which the film member 51 ′ is bent. The air whose amount is changed is blown out in a state where it slightly enters the region E4 of the air outlet 15 (Sb).

  On the contrary, when the film member 51 is in a state in which the lower end side is swaying into the inside of the adjacent air outlet 15 region E3 like the film member 51 ″ shown by the two-dot chain line in FIG. The air (S) flowing through the flow path J3 flows in a direction almost directly along the vertical partition plate 42 (b) forming the flow path J3, and finally the direction in which the film member 51 ″ is bent. Then, the air whose amount has been changed is blown out in a state where the air has slightly entered the area E3 of the air outlet 15 and the adjacent area E2 (Sc).

  As a result, the air (S) blown out from the regions E1 to E6 of the air blowout port 15 is slightly changed in blowout direction immediately before the blowout due to the swaying motion caused by the air flow of the film member 51 in the wind direction change adjusting means 50A. Therefore, the strength of the air blown out in the vicinity of the partition plates 40 to 44 is alleviated and is less likely to be generated (see the wind force distribution curve shown by the two-dot chain line in FIG. 13), and the unevenness of the blowing state is reduced.

  Therefore, the air blown out from the air ejection port 15 is a discharge wire 122 stretched inward and downward through the upper surface opening 121a of the shield case 121 of the charging device 120 or a grid installed below the lower surface opening of the shield case 121. 123 is sprayed almost uniformly over the entire area in the longitudinal direction A. For this reason, paper powder, toner, and other floating substances and electrostatic products that float so as to approach the discharge wire 122 and the like are blown evenly by the blowing air, or floating that has already adhered to the discharge wire 122 and the like. Objects are blown out evenly, and local contamination does not occur over the entire area of the discharge wire 122. As a result, in the image forming apparatus 100, the photosensitive member 110 is uniformly charged by the charging device 120, so that the image quality of the obtained image is uniform and high quality.

<Embodiment 2>
FIG. 6 is a perspective view mainly showing an air blowing cleaning apparatus according to the second embodiment.

  The air blowing cleaning device 1B according to the second embodiment is different in that it adopts a different configuration instead of the configuration of the air direction change adjusting means 50A in the air blowing cleaning device 1A according to the first embodiment. Is the same.

  That is, as shown in FIG. 6 and FIG. 7, the direction change adjusting means 50B in the air blowing cleaning device 1B has the air blowing port 15 at the tip of the partition plates (40c to 44c) on the air blowing port 15 side. A swing plate 53 that swings along the longitudinal direction A is attached.

  The swing plate 53 is formed of, for example, a rectangular flat plate made of the same material as that of the partition plate 40 and the like, and its upper end portion can be rotated to the tip end portion of each partition plate via a support shaft 54. The link bar 56 is removably moved in the longitudinal direction A via an arm member 55 fixed to a shaft end projecting from the duct 10. It is connected to the pivotable. The link bar 56 is connected to a drive device 57 that reciprocates it in the longitudinal direction A. The drive device 57 does not need to be a dedicated device, and can of course be configured to procure the necessary drive force from the drive system for the other components of the image forming apparatus 100. And this rocking | fluctuation board 53 rock | fluctuates intermittently whenever predetermined time passes, and the direction of the plate | board surface is changed. The swing plate 53 may be swung continuously.

  Hereinafter, the main part of the air blowing operation by the air blowing cleaning apparatus 1B provided with such a wind direction change adjusting means 50B composed of the swing plate 53 will be described.

  First, similarly to the air blowing and cleaning apparatus 1A according to the first embodiment, air (S) blown by the blower fan 20 and sent through the flow paths (J1 to J6) in the blower duct 10 respectively. As shown in FIGS. 6 and 7 (see also FIG. 4), the charging device 120 is provided for each partition area (E1 to E6) of the air outlet 15 that is finally partitioned by the partitions 40b to 44b through the duct rising body 11. It is blown out toward.

  At this time, as shown in FIG. 7, a part of the air (S) passes while touching the rocking plate 53 in the wind direction change adjusting means 50 </ b> B before being blown out from the air blowing port 15. At this time, each swing plate 53 is moved forward and backward along the longitudinal direction A by the power of the driving device 57, so that the support shaft 54 is moved in a predetermined direction along with the movement of the link bar 56. Rotate in the direction, and thereby swing about a predetermined plate surface angle (posture) with the support shaft 54 as a fulcrum (becomes a posture state as indicated by reference numerals 53a and 53b). By swinging each swing plate 53, the direction of the air immediately before flowing out along at least the vicinity of the partition plates 40b to 44b by changing along the flow paths (J1 to J6) is changed.

  That is, when the swinging plate 53 is in a posture state in which the swinging plate 53 is peeled down directly along the surface of the partition plate as shown by the solid line in FIG. 7, for example, air (S) flowing through the flow path J3 The air flows in a state (directed by the reference sign Sa) almost directly along the vertical partition plate 42 (b) forming J3 and blows out from the region E3 of the air outlet 15 (Sa). If this state continues to be fixed, as in the case described above, the strength of the air blown out in the vicinity of the partition plate is generated and the blowing state becomes uneven.

  On the other hand, the swinging plate 53 swings to an angle such that the lower end side enters the adjacent air outlet 15 region E4 side like the swinging plate 53 ′ shown by the two-dot chain line in FIG. In this state, the air (S) flowing through the flow path J3 flows in a direction almost directly along the vertical partition plate 42 (b) forming the flow path J3, and finally the swing plate 53. It flows along the direction of the inclined plate surface of ′, and the air whose amount has been changed blows out in a state where it slightly enters the region E4 of the air outlet 15 (Sb).

  On the contrary, the swing plate 53 swings to such an angle that the lower end side of the swing plate 53 ″ enters the inside of the adjacent air outlet 15 region E3 as shown by a two-dot chain line in FIG. When in the stopped state, the air (S) flowing through the flow path J3 flows in a direction almost directly along the vertical partition plate 42 (b) forming the flow path J3, and finally the swinging plate. It flows along the direction of the plate surface of 53 ″, and the air whose amount has been changed blows out in a state of entering the inside of the area E3 of the air outlet 15 and the adjacent area E2 (Sc).

  As a result, the blowing direction of the air (S) blown out from the areas E1 to E6 of the air blowing port 15 is slightly changed by the swinging (tilting) posture of the swinging plate 53 in the wind direction change adjusting means 50B immediately before the blowing. Therefore, the strength of the air blown off in the vicinity of the partition plates 40 to 44 is alleviated and less likely to be generated, and the unevenness of the blowing state is reduced.

  Accordingly, the air blown out from the air ejection port 15 is substantially the same as in the first embodiment, and the discharge wire 122 stretched inward and downward through the upper surface opening 121a of the shield case 121 of the charging device 120, and the shield case 121. The grid 123 installed on the lower side of the lower surface opening is sprayed almost uniformly over the entire area in the longitudinal direction A. In particular, in the wind direction change adjusting means 50B, the tilt posture of the swing plate 53 can be arbitrarily changed by the control of the driving device 57.

<Embodiment 3>
FIG. 8 is a perspective view mainly showing an air blowing cleaning apparatus according to the third embodiment.

  The air blowing cleaning device 1C according to the third embodiment is different in that it adopts a different configuration in place of the configuration of the air direction change adjusting means 50A in the air blowing cleaning device 1A according to the first embodiment. Is the same.

  That is, as shown in FIG. 8 and FIG. 9, the direction change adjusting means 50C in the air blowing cleaning device 1C has the air blowing port 15 at the tip of the partition plates (40c to 44c) on the air blowing port 15 side. A rotating plate 58 that is rotationally driven along the longitudinal direction A is attached.

  The rotating plate 58 is formed of, for example, a circular plate surface with the same material as that of the partition plate 40 and the like, and has a predetermined angle with respect to the rotating shaft 59 extending in the longitudinal direction A so as to pass through the center portion thereof. It is fixed and attached in a tilted state. The plate surface shape of the rotary plate 58 may be other than a circle, and may be, for example, an ellipse or a curved surface. The rotary shaft 59 to which the rotary plate 58 is attached is connected to a rotary drive device 62 via a gear 61 so as to be driven to rotate. The rotary drive device 62 does not need to be a dedicated device, and can of course be configured to appropriately procure the necessary drive force from the drive system for the other components of the image forming apparatus 100. The rotating plate 58 rotates intermittently by a predetermined angle every time a predetermined time elapses so that the orientation of the plate surface is changed. The rotating plate 58 may be continuously rotated.

  Hereinafter, the main part of the air blowing operation by the air blowing cleaning apparatus 1C provided with the air direction change adjusting means 50C composed of the rotating plate 58 will be described.

  First, similarly to the air blowing and cleaning apparatus 1A according to the first embodiment, air (S) blown by the blower fan 20 and sent through the flow paths (J1 to J6) in the blower duct 10 respectively. As shown in FIGS. 8 and 9 (see also FIG. 4), the charging device 120 is provided for each partition area (E1 to E6) of the air outlet 15 that is finally partitioned by the partitions 40b to 44b through the duct rising body 11. It is blown out toward.

  At this time, as shown in FIG. 9, a part of the air (S) passes while touching the rotating plate 58 in the wind direction change adjusting means 50 </ b> C before being blown out from the air outlet 15. At this time, each rotary plate 58 is rotated so that the rotary shaft 59 is rotated by a predetermined angle in a predetermined direction by the power of the driving device 62, and thereby the predetermined plate surface angle (posture) is set around the rotary shaft 59. Move (becomes a posture state as indicated by reference numerals 58a and 58b). By rotating each rotary plate 58, the direction of air immediately before flowing out along at least the vicinity of the partition plates 40b to 44b through the flow paths (J1 to J6) is changed.

  That is, the rotating plate 58 is rotated and stopped to such an angle that the lower side of the plate surface enters the adjacent air outlet 15 region E4 side like a swing plate 58 ′ shown by a two-dot chain line in FIG. When in the state, the air (S) flowing through the flow path J3 flows in a direction substantially directly along the vertical partition plate 42 (b) that forms the flow path J3, and finally the rotation plate 58 ′. The air flows along the direction of the inclined plate surface, and the air whose amount is changed is blown out in a state where it slightly enters the region E4 of the air outlet 15 (Sb).

  On the contrary, the rotating plate 58 rotates to such an angle that the lower side of the plate surface enters the inside of the adjacent air outlet 15 region E3 like a swing plate 58 ″ shown by a two-dot chain line in FIG. When in a stopped state, the air (S) flowing through the flow path J3 flows in a direction almost directly along the vertical partition plate 42 (b) forming the flow path J3, and finally the rotating plate 58. It flows along the direction of the body body surface of ″, and the air whose amount has been changed is blown out in a state where it slightly enters the area E3 of the air outlet 15 or the adjacent area E2 (Sc).

  As a result, the air (S) blown out from the areas E1 to E6 of the air blowout port 15 has a delicate blowout direction due to the rotation (rotation of the plate surface) of the rotary plate 58 in the wind direction change adjusting means 50C immediately before the blowout. Since it is changed, the strength of the air blown out in the vicinity of the partition plates 40 to 44 is alleviated and less likely to occur, and the unevenness of the blowing state is reduced.

  Accordingly, the air blown out from the air ejection port 15 is substantially the same as in the first embodiment, and the discharge wire 122 stretched inward and downward through the upper surface opening 121a of the shield case 121 of the charging device 120, and the shield case 121. The grid 123 installed on the lower side of the lower surface opening is sprayed almost uniformly over the entire area in the longitudinal direction A. In particular, in this wind direction change adjusting means 50C, the plate surface inclination posture of the rotating plate 58 can be arbitrarily changed by the control of the driving device 62, as in the case of the adjusting device 50B according to the second embodiment.

<Embodiment 4>
FIG. 10 is a perspective view mainly showing an air blowing cleaning apparatus according to the fourth embodiment.

  The air blowing cleaning device 1D according to the fourth embodiment is different in that it adopts a different configuration instead of the configuration of the air direction change adjusting means 50A in the air blowing cleaning device 1A according to the first embodiment. Is the same.

  That is, as shown in FIGS. 10 to 12, the direction change adjusting means 50D in the air blast cleaning device 1D has air at the tip formed so as to reach the air outlet 15 of each partition plate (40c to 44c). A plurality of protrusions 63 that are driven in and out along the longitudinal direction A of the blowout port 15 are attached.

  The protruding portion 63 is made of, for example, a synthetic resin material, and is formed in, for example, a round bar shape. Also, as shown in FIG. It is erected. The height of the protruding portion 63 is set according to the height that is desired to protrude from the surface of the partition plate with a dimension larger than the thickness of the partition plate. About the form of the protrusion part 63, things other than a rod-shape may be sufficient, for example, it is good also as an ellipse shape, an indeterminate shape, etc. The protrusion 63 is attached to the support plate 64 and is connected to each partition plate (40c to 40c) through a through hole formed so that the protrusion 63 is slidably fitted on the tip end side of each partition plate. 44c) is removably attached. The direction of appearance is the same as the longitudinal direction A of the air outlet 15.

  Each support plate 64 is connected in a fixed state to a slide bar 66 that reciprocates in the longitudinal direction A via an arm member 65 that protrudes outside the duct 10 and is bent so as to bend downward. . The slide bar 66 is connected to a drive device 67 that reciprocates the slide bar 66 in the longitudinal direction A. The drive device 67 does not need to be a dedicated device, and can of course be configured to procure the necessary drive force from the drive system for the other components of the image forming apparatus 100. And this protrusion part 63 slides intermittently whenever predetermined time passes, protrudes only the predetermined amount from the board surface of the partition plate, or completely sunk in the board surface, and the protrusion state is It has been changed. Note that the protrusion 63 may be continuously driven in and out.

  Hereinafter, the main part of the air blowing operation by the air blowing cleaning apparatus 1D provided with the air direction change adjusting means 50D including the protruding portion 63 will be described.

  First, similarly to the air blowing and cleaning apparatus 1A according to the first embodiment, air (S) blown by the blower fan 20 and sent through the flow paths (J1 to J6) in the blower duct 10 respectively. As shown in FIGS. 10 and 11 (see also FIG. 4), the charging device 120 is provided for each partition area (E1 to E6) of the air outlet 15 that is finally partitioned by the partitions 40b to 44b through the duct raising body 11. It is blown out toward.

  At this time, as shown in FIG. 11, a part of the air (S) may pass while touching the protrusion 63 in the wind direction change adjusting means 50 </ b> D before being blown out from the air blowing port 15. At this time, each protrusion 63 is supported via the arm member 65 as the slide bar 66 moves by moving the slide bar 66 forward and backward along the longitudinal direction A by the power of the driving device 67. The plate 64 slides in a predetermined direction along the longitudinal direction A. Thereby, as shown on the lower side of FIG. 12, all the protrusions 63 on the support plate 64 project from the plate surface by a predetermined height (amount) through the through holes of the partition plate, Drive in and out so as to be buried in the plate surface (becomes a posture state as indicated by reference numerals 63 ′ and 63 ″). As each projecting portion 63 moves in and out, the direction of the air immediately before flowing out along at least the vicinity of the partition plates 40b to 44b through the flow paths (J1 to J6) is changed.

  That is, when the projecting portion 63 is in a state projecting from the surface of the partition plate like the projecting portion 63 ′ indicated by the solid line in FIG. 11, the air (S) flowing through the flow path J3 forms the flow path J3. After flowing in a direction almost directly along the vertical partition plate 42 (b), the turbulent flow while changing the direction while colliding with each projecting portion 63 projecting last (irregularity as shown by Sd) So that the amount of air whose flow has been changed is irregularly disturbed and blown out in a state where the air has entered the other part of the area E3 of the air outlet 15 and the adjacent area E4. Become. By adjusting the protrusion height of the protrusion 63 at this time, the degree of receiving the wind direction changing action by the protrusion 63 also changes.

  On the other hand, when the protruding portion 63 is buried in the surface of the partition plate like the protruding portion swinging plate 63 ″ indicated by a two-dot chain line in FIG. 11, for example, air flowing through the flow path J3 (S ) Flows along the vertical partition plate 42 (b) forming the flow path J3 in a state of being directed almost directly below (wind direction indicated by symbol Sa) and blows out from the region E3 of the air outlet 15. If this state continues to be fixed, as in the case described above, the strength of the air blown out in the vicinity of the partition plate is generated and the blowing state becomes uneven.

As a result, the air (S) blown out from the areas E1 to E6 of the air blowout port 15 is the degree of protrusion of the protrusion 63 in the wind direction change adjusting means 50D (or its shape, arrangement pattern, etc. are included) immediately before the air is blown out. Since the blowing direction is slightly changed due to the difference in the conditions (Sd), the strength of the air blown out in the vicinity of the partition plates 40 to 44 is relaxed and hardly generated, and the unevenness of the blowing state is also reduced.
<Other embodiments>

  In the first to fourth embodiments, the case where the air blowing cleaning device 1 is applied to the corona discharge charging device 120 is exemplified. However, for example, glass installed on the optical path of the exposure light of the image exposure device 130, for example. It is also possible to apply to a part such as a surface or a mirror surface. Thereby, it is possible to prevent the suspended matter from becoming uneven and adhering to the glass surface or the mirror surface to be contaminated, and normal image exposure can be performed.

FIG. 2 is a schematic explanatory diagram illustrating a main part of an image forming apparatus according to Embodiment 1 (including Embodiments 2 to 4). It is a perspective view which mainly shows the air spray cleaning apparatus which concerns on Embodiment 1. FIG. It is plane explanatory drawing which shows the inside of the duct of a cleaning apparatus. It is explanatory drawing which shows the structure and operation | movement state of a wind direction change adjustment means in the air spray cleaning apparatus of FIG. It is a front view which shows the typical structural example of a film member. It is a perspective view which mainly shows the air blowing cleaning apparatus which concerns on Embodiment 2. FIG. It is explanatory drawing which shows the structure and operation | movement state of a wind direction change adjustment means in the air spray cleaning apparatus of FIG. It is a perspective view which mainly shows the air blowing cleaning apparatus which concerns on Embodiment 3. FIG. It is explanatory drawing which shows the structure and operation state of the wind direction change adjustment means in the air spray cleaning apparatus of FIG. It is a perspective view which mainly shows the air spray cleaning apparatus which concerns on Embodiment 4. FIG. It is explanatory drawing which shows the structure and operation state of a wind direction change adjustment means in the air spray cleaning apparatus of FIG. It is explanatory drawing which shows the structure and operation state of the wind direction change adjustment means of a protrusion part. It is explanatory drawing which shows the generation | occurrence | production state and improvement state of the strength (unevenness) of the conventional blowing air.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1A, 1B, 1C, 1D ... Air blowing cleaning apparatus, 10 ... Air duct, 15 ... Air blower, 20 ... Air blower, 40-44 ... Partition plate, 50A, 50B, 50C, 50D ... Wind direction change adjustment means, 51 ... Film member, 53 ... Oscillating plate (movable plate), 58 ... Rotating plate (movable plate), 63 ... Projection, 100 ... Image forming device, 120 ... Corona discharge type charging device (cleaning object, long structure) Parts), A ... longitudinal direction (long direction), E1-E6 ... region, J1-J6 ... flow path, S ... air (flow).

Claims (4)

An air spray cleaning device that blows air to a long object that needs to suppress adhesion of floating substances at least in the long direction,
A blower duct having a hollow structure in which a long air outlet facing the long cleaning target portion of the object is opened on one end side,
A blower fan that blows air into the hollow interior of the blower duct;
A plurality of flow paths extending in front of the air blowing port into the hollow interior of the blowing duct so that the air of the blowing fan is distributed and blown out from the regions divided at intervals in the longitudinal direction of the air blowing port. A plurality of partition plates provided to form; and
The free end is adjacent to the air outlet side of the air duct in the vicinity of the air outlet of the air duct by the air flow flowing along the flow path formed by each of the partition plates at the front end of the plurality of partition plates. Attach a film member that swings so as to enter the flow path, and flow along each flow path and at least the direction of the air just before flowing out through the vicinity of the partition plate , a part of the air of the film member Wind direction change adjusting means for changing and adjusting so as to enter into the adjacent area in the plurality of air outlet areas partitioned by each partition plate according to the state of shaking ,
An air spray cleaning device , wherein a plurality of slits or notches are formed at a free end of the film member of the wind direction change adjusting means . An air spray cleaning device that blows air to a long object that needs to suppress adhesion of floating substances at least in the long direction,
A blower duct having a hollow structure in which a long air outlet facing the long cleaning target portion of the object is opened on one end side,
A blower fan that blows air into the hollow interior of the blower duct;
A plurality of flow paths extending to the front of the air outlet in the hollow interior of the air duct so that the air of the blower fan is distributed and blown out from the region divided at intervals in the longitudinal direction of the air outlet. A plurality of partition plates provided to form; and
The state of the plate surface on which the air that flows out along each flow path formed by each partition plate is applied to the air outlet side tip of the plurality of partition plates is near the air outlet port of the air duct. the movable plate that next moving of the flow channel continuously or intermittently about to be changed in a state that enters installed, the air direction of the immediately preceding flowing through the vicinity of at least the partition plate flow along their respective flow paths, the Wind direction change adjusting means for changing and adjusting so that a part of the air enters the adjacent area in the plurality of air outlet areas divided by each partition plate according to the state of the plate surface of the movable plate An air spray cleaning device characterized by. An apparatus for forming an image on a sheet-like recording medium,
The air blowing cleaning according to claim 1, as a device for blowing air toward a longitudinal direction of a long component which needs to suppress at least the adhesion of floating substances among components used for image formation. An image forming apparatus using the apparatus. An apparatus for forming an image on a sheet-like recording medium,
The air blowing cleaning according to claim 2, as a device that blows air to a longitudinal component of a component that is required to suppress adhesion of floating substances at least among components used for image formation. An image forming apparatus using the apparatus.

Images