JP4366606B2 - Discharged driven roller mounting device - Google Patents

Description

  The present invention relates to a paper discharge driven roller mounting device for mounting a paper discharge driven roller that contacts a recording surface of a recording paper and rotates in accordance with the paper discharge of the recording paper, and an ink jet recording apparatus including the same.

  Generally, a recording paper discharge mechanism of an ink jet recording apparatus is in contact with a discharge driving roller whose rotation is controlled by a stepping motor or the like, and a recording surface of the recording paper discharged by the rotation of the discharge driving roller. And a plurality of paper discharge driven rollers that rotate following the recording paper discharge. The paper discharge driven roller includes a plurality of paper discharge driven rollers that are individually urged with respect to the paper discharge driving roller, and a paper discharge driven roller that is disposed immediately upstream and rotates in contact with the recording paper. There is a roller. The recording paper is urged by the paper discharge drive roller by the urging force of the paper discharge driven roller provided by being urged by the paper discharge drive roller while being in contact with the paper discharge driven roller. The sheet is discharged by transmitting the rotational force.

  In such a paper discharge mechanism of the ink jet recording apparatus, the paper discharge driven rollers that are individually urged with respect to the paper discharge drive roller are urged to the paper discharge drive roller by a weak biasing force such as a spring. As a result, the recording paper comes into contact with the paper discharge drive roller, and the recording surface that is in contact with the paper discharge driven roller is not damaged by being rotated following the discharge of the recording paper. . Further, a discharge driven roller disposed on the upstream side and rotating in contact with the recording paper is rotated in contact with the recording paper, and the recording paper is conveyed by regulating the recording paper downward from above. When the paper is discharged while being recorded near the end of the recording paper away from the roller, it serves to prevent the recording paper from floating from the platen.

  Therefore, a so-called star wheel or a serrated roller is widely used as a discharge driven roller of an ink jet recording apparatus, and a toothed roller having a plurality of teeth on a peripheral surface is widely used. This is because the area where the paper discharge driven roller is in contact with the recording surface of the recording paper is made as small as possible and the discharge driving roller is in contact with the recording paper with the weakest possible force so that the recording surface of the recording paper is not damaged. The purpose is to eject the paper.

  In the ink jet recording apparatus, the paper discharge driven roller is a part of the configuration of the ink jet recording apparatus, and is a metal paper discharge located on the downstream side in the sub scanning direction of the recording head that reciprocates in the main scanning direction. Usually arranged on the frame. Conventionally, in general, a paper discharge driven roller is driven by a paper discharge driven roller mounting device made of a resin member made by injection molding of plastic or the like with respect to a metal paper discharge frame. It is pivotally supported and attached.

  FIG. 8 is a perspective view showing an aspect of a conventional paper discharge driven roller mounting device. A paper discharge driven roller 56 that is rotatably supported by the bar spring 41 and is urged by a paper discharge driving roller (not shown) by the elastic force of the bar spring 41 is provided at both ends of the bar spring 41. Are attached in a state of being supported by the support portion 43. Further, the bar spring 41 has a positioning portion 45 configured by slightly increasing a part of the winding diameter, and both side surfaces of the bar spring 41 abut on the first guide 44 in the lateral direction. It plays the role of deciding the position. Further, the bar spring 41 is positioned so as not to be detached from the support portion 43 at the same time as being positioned by the second guide 46.

  The paper discharge driven roller 56 disposed upstream of the paper discharge driven roller 56 in the sub-scanning direction Y is pivotally supported on the rotation shaft 49. The paper discharge driven roller 56 is disposed at a position sandwiched between the wall 47 and the protrusion 48, and the position thereof is regulated thereby.

JP 2000-071538 A

  Generally, a resin member obtained by injection molding needs to be provided with a punch taper at a portion formed by a punch die. Here, the taper indicates a state where opposite side surfaces are inclined symmetrically. The punching taper is a taper of a portion formed by a punching die provided with a slight taper on a vertical surface so that the punching die can be easily taken out at the time of injection molding. Therefore, in the paper discharge driven roller mounting device that provides a pair of parallel walls on both sides of the paper discharge driven roller 56 and thereby regulates the position of the paper discharge driven roller 56, the conventional resin structure by injection molding uses the pair of walls. A draft taper had to be provided on the wall, and the paper discharge driven roller 56 was rattled by the draft taper.

  In addition, since the paper discharge driven roller mounting device using the resin member is attached to the metal paper discharge frame 30, there is some backlash between the paper discharge driven roller mounting device and the paper discharge frame 30. As a result, the paper discharge driven roller 56 also rattles.

  Further, conventionally, the paper discharge driven roller 56 pivotally supported by the bar spring 41 regulates the position of the bar spring 41, so that the paper discharge driven roller 56 in the sub-scanning direction Y, which is the direction in which the recording paper is discharged. The position of was indirectly regulated. For this reason, the position of the paper discharge driven roller 56 cannot be directly regulated in the direction, and the paper discharge driven roller 56 is rattled.

  Further, the above-described rattling of the paper discharge driven roller 56 due to the drawing taper, the backlash between the paper discharge driven roller mounting device and the paper discharge frame 30, and the position of the paper discharge driven roller 56 cannot be directly regulated. There is a possibility that the paper discharge operation becomes unstable due to rattling, and when the paper discharge driven roller 56 rotates in contact with the recording surface of the recording paper, it comes into contact with the recording paper discharge direction obliquely. There was a risk of damaging the recording surface.

  The present invention has been made in view of such a situation, and the problem is that, in an ink jet recording apparatus, the discharge driven roller is less rattling and the position and posture of the discharge driven roller are regulated with high accuracy. It is an object of the present invention to enable stable paper discharge with little risk of damaging the recording surface of the recording paper by a paper discharge driven roller mounting device that can perform the above operation.

In order to achieve the above object, according to a first aspect of the present invention, a paper discharge driven roller is rotatably supported by contacting a recording surface of a recording paper via a rotating shaft and following the discharge of the recording paper. And a first position restricting portion for restricting the position of the discharge driven roller in the rotation axis direction from both sides of the discharge driven roller, and the discharge driven roller mounting portion; The first position restricting portion is formed by bending a part of a paper discharge frame made of a metal member, and the paper discharge driven roller is integrally formed only by a metal member. A discharge driven roller mounting device characterized by the above.

  As described above, the first position restricting portion that restricts the position in the direction orthogonal to the direction in which the recording paper is discharged is configured by bending a part of the discharge frame made of a metal member. Unlike the conventional ejection driven roller mounting device using injection molded resin parts, it is not necessary to provide a taper, and it is possible to configure parallel position regulating surfaces without taper on both sides of the ejection driven roller. Become. Therefore, it becomes possible to regulate the position of the paper discharge driven roller with high accuracy, and rattling of the paper discharge driven roller is reduced.

  Further, since the discharge driven roller mounting portion is integrally formed by bending a part of the discharge frame made of a metal member, the backlash between the discharge frame and the discharge driven roller mounting device is There is no stickiness, which reduces the play of the paper discharge driven roller.

Thereby, according to the paper discharge driven roller mounting device described in the first aspect of the present invention, in the ink jet type recording apparatus, the paper discharge driven roller is less rattling and the paper discharge driven roller has a high position and posture. It becomes possible to regulate with high accuracy, thereby obtaining the effect of performing stable paper discharge with little risk of damaging the recording surface of the recording paper.

According to a second aspect of the present invention, in the first aspect described above , the discharge driven roller includes a spur having a star shape having a plurality of teeth on a peripheral surface of a disk, and a metal member forming the rotation shaft. And a bearing portion that is rotatably supported by a bar spring and has a shape protruding at least on one side of the spur, and the position of the discharge driven roller in the direction in which the recording paper is discharged. There is provided a second position restricting portion that performs restriction by directly restricting the position of the bearing portion of the discharge driven roller, and the second position restricting portion faces each other from both sides with the bar spring interposed therebetween. A pair of parallel walls formed by bending a part of the paper discharge frame in a direction are arranged on both sides of the spur, respectively. This is a paper driven roller mounting device.

  As described above, a spur having a star shape having a plurality of teeth on the peripheral surface of the disc, and a bearing portion rotatably supported by a bar spring and having a shape protruding at least on one side of the spur By restricting the position of the bearing portion of the discharged paper driven roller, it becomes possible to directly control the position of the discharged paper driven roller in the direction in which the recording paper is discharged.

  As described above, by restricting the position of the bearing portion of the discharge driven roller by the second position restricting portion, it is possible to directly control the position of the discharge driven roller supported by the bar spring. Therefore, it is possible to reduce the shakiness of the discharge driven roller compared to the position control of the discharge driven roller that is indirectly performed by restricting the position of the bar spring as in the prior art.

Thus, according to the discharge driven roller mounting device described in the second aspect of the present invention, in the ink jet type recording apparatus, in addition to the function and effect of the invention described in the first aspect described above , the shaft is attached to the bar spring. Even in the supported paper discharge driven roller, it is possible to obtain the effect of performing stable paper discharge with little risk of damaging the recording surface of the recording paper.

  Further, the position of the bearing portion of the discharge driven roller is regulated by a pair of parallel walls facing each other from both sides with the bar spring interposed therebetween. Since the pair of walls are arranged on both sides of the spur, the direction of the bearing portion protruding to one side of the paper discharge driven roller supported by the bar spring is on which side. However, it is possible to regulate the position of the bearing portion.

Thereby, according to the discharge driven roller mounting device described in the second aspect of the present invention, in the ink jet type recording apparatus, in addition to the function and effect of the invention described in the first aspect described above, it protrudes to one side. Regardless of which side the bearing portion is oriented, it is possible to obtain an effect that the position of the discharge driven roller relative to the discharge direction of the recording paper can be regulated.

In another aspect of the discharge driven roller attachment device according to the present invention, in the second aspect described above , at least one or more of the first position restricting portions are provided in the second position restricting portion, and the discharge A paper discharge driven roller mounting device comprising a protruding portion protruding toward a side surface of the paper driven roller.

  The second position restricting portion forms a pair of parallel walls facing each other from both sides with the bar spring interposed therebetween, and the pair of walls are arranged on both sides with the spur in between. The first position restricting portions for restricting the position of the discharge driven roller in the direction orthogonal to the direction in which the recording paper is discharged from both sides of the discharge driven roller are arranged on both sides of the spur. It is comprised by the projection part provided in a pair of parallel wall.

  In other words, the first position restricting portion includes the second position restricting portion and the protrusion provided on the second position restricting portion, and the second position restricting portion is the first position restricting portion. It has become a part of the part. Therefore, the first position restricting portion and the second position restricting portion can be configured by providing the protrusions on the pair of parallel walls facing each other from both sides with the bar spring interposed therebetween.

Thereby, in the ink jet recording apparatus, in addition to the operational effects of the invention described in the second aspect described above , the first position restricting portion and the second position restricting portion are efficiently configured by less bending. The effect that it becomes possible is obtained.

Furthermore, in another aspect of the discharge driven roller mounting device according to the present invention, in the second aspect described above, the discharge driven roller mounting portion is opposed to the discharge driven roller, and the discharge driven roller A pair of walls having a surface parallel to the roller, and one wall of the pair of walls is provided with a first support portion for supporting the one end of the bar spring in a fixed state, The other wall is provided with a second support portion that supports the other end portion of the bar spring in a state of being loosely inserted into the through hole, and the pair of walls includes a part of the paper discharge frame, 2 is a discharge driven roller mounting device configured to bend in a direction orthogonal to a bending direction of the position restricting portion of 2.

  One end of the bar spring is supported in a fixed state, and the other end of the opposite side is supported in a state of being loosely inserted into the through hole and not fixed, so that the bar spring is in a twisted state. Therefore, the urging force acting on the paper discharge driven roller is stabilized. The paper discharge driven roller mounting portion includes a pair of walls facing each other with the paper discharge driven roller interposed therebetween and having a surface parallel to the paper discharge driven roller. It is comprised by bending in the direction orthogonal to the bending direction of a part.

  As described above, the bending direction of the pair of opposed walls of the discharge driven roller attachment portion and the bending direction of the pair of opposed walls of the second position regulating portion are orthogonal bending directions. Processing accuracy of the roller mounting portion and the second position restricting portion is easily obtained.

As a result, in the ink jet recording apparatus, in addition to the operational effects of the invention described in the second aspect described above, there is an operational effect that the discharge driven roller mounting device can be easily configured with high accuracy. It is done.

The invention according to the first aspect and the second aspect of the present invention is characterized in that the discharge driven roller is integrally formed by only a metal member. Device.

  As described above, the discharge driven roller is integrally formed by only a metal member, and is attached to the discharge driven roller mounting portion formed by bending the discharge frame made of the metal member. The paper discharge driven roller and the paper discharge frame are electrically connected. Therefore, static electricity generated by friction between the surface of the recording paper and the discharge driven roller is discharged to the discharge frame without being accumulated on the recording paper and the discharge driven roller.

As a result, according to the discharge driven roller mounting device according to the first and second aspects of the present invention, the ink jet recording apparatus generates friction between the surface of the recording paper and the discharge driven roller. The effect of reducing the influence of static electricity is obtained.

The invention described in the third aspect of the present invention is an ink jet recording apparatus provided with the paper discharge driven roller mounting device described in the first aspect or the second aspect . According to the ink jet recording apparatus described in the third aspect of the present invention, the operational effects of the invention described in the first aspect or the second aspect described above can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic plan view showing an ink jet recording apparatus according to the present invention, and FIG. 2 is a side view thereof.

  The recording apparatus 50 is provided with a carriage 61 that is supported by a carriage guide shaft 51 and moves in the main scanning direction X as recording means for performing recording on the recording paper P. A recording head 62 that performs recording by ejecting ink onto the recording paper P is mounted on the carriage 61. A platen 52 that defines the gap between the head surface of the recording head 62 and the recording paper P is provided facing the recording head 62. The recording head 62 ejects ink onto the recording paper P while transporting the carriage 61 in the main scanning direction X and intermittently transporting the recording paper P between the carriage 61 and the platen 52 in the sub-scanning direction Y. Thus, recording is performed on the recording paper P.

  The paper feed tray 58 is configured to feed recording paper P such as plain paper or photo paper, for example, and is provided with an ASF (auto sheet feeder) for automatically feeding the recording paper P. Yes. The ASF is an automatic paper feed mechanism having two paper feed rollers 57 provided on a paper feed tray and a separation pad (not shown). The paper feed roller 57 is rotationally controlled by a rotational driving force such as a stepping motor and has a D-shaped cross-sectional shape. One of the two paper feed rollers 57 is disposed on one side of the paper feed tray 58, the other paper feed roller 57 is attached to a recording paper guide 59, and the recording paper guide 59 is a recording paper. The paper feed tray 58 is provided so as to be slidable in the direction of the arrow indicated by the symbol A in accordance with the width of P. When a plurality of recording sheets P placed on the sheet feeding tray 58 are fed by the rotational driving force of the sheet feeding roller 57 and the frictional resistance of the separation pad, the plurality of recording sheets P are fed at a time. Without being automatically fed one sheet at a time.

  Then, the recording paper P automatically fed by the ASF is downstream of the sub-scanning direction Y, which is the recording execution area side, by the recording paper transporting means disposed downstream of the paper feeding roller 57 in the sub-scanning direction Y. Toward the end, the paper is intermittently conveyed by a predetermined paper feed amount.

  As recording paper conveying means for intermittently conveying the recording paper P in the sub-scanning direction Y, a conveyance driving roller 53 and a conveyance driven roller 54 are provided. The conveyance driving roller 53 is rotationally controlled by a rotational driving force such as a stepping motor, and the recording paper P is conveyed in the sub-scanning direction Y by the rotation of the conveyance driving roller 53. A plurality of transport driven rollers 54 are provided and are individually urged by the transport driving roller 53, and the recording paper P is in contact with the recording paper P when the recording paper P is transported by the rotation of the transport driving roller 53. Rotates following the conveyance.

  Further, a paper detector 63 according to a known technique in the prior art is disposed between the paper feed roller 57 and the conveyance drive roller 53. The paper detector 63 has a lever that is pivotally supported in a state that it is given a self-returning behavior to a standing posture and protrudes into the conveyance path of the recording paper P so as to be able to rotate only in the recording paper conveyance direction. The detector is configured to detect the recording paper P by rotating the lever when the tip of the lever is pressed against the recording paper P. The paper detector 63 detects the start end position and the end position of the recording paper P fed from the paper feed roller 57, determines a recording area according to the detected position, and executes recording.

  On the other hand, a discharge driving roller 55 and a discharge driven roller 56 are provided as means for discharging the recorded recording paper P. The paper discharge driving roller 55 is rotationally controlled by a rotational driving force such as a stepping motor, and the recording paper P is discharged in the sub-scanning direction Y by the rotation of the paper discharge driving roller 55. The paper discharge driven roller 56 is a star wheel that is provided with a plurality of teeth, has a plurality of teeth around it, and is sharply pointed so that the tip of each tooth makes point contact with the recording surface of the recording paper P. Is ejected by the rotation of the ejection driving roller 55, the recording paper P is in contact with the recording paper P and is rotated following the ejection of the recording paper P.

  Further, the discharge driven roller 56 disposed on the upstream side thereof and rotating in contact with the recording paper P is rotated in contact with the recording paper P and regulates the recording paper P downward from above, It plays a role in preventing the recording paper P from floating from the platen 52 when the recording paper P is separated from the transport driving roller 53 and the transport driven roller 54 and discharged while being recorded near the end of the recording paper P. Yes.

  FIG. 3 is a perspective view showing a first embodiment of the discharged paper driven roller mounting device according to the present invention. FIG. 4 is a perspective view showing the same discharge driven roller mounting device from different angles. In addition, in order to explain the configuration in an easy-to-understand manner, a state before the paper discharge driven roller 56 is pivotally supported is shown. Hereinafter, a description will be given with reference to FIGS. 3 and 4.

  The wall 21 is configured by bending a part of the paper discharge frame 30 at an angle of 90 degrees. The wall 21 is provided with a rotating shaft 23 that pivotally supports the paper discharge driven roller 56. Further, five protrusions 22 constituting a part of the first position restricting portion for restricting the position of the paper discharge driven roller 56 in the direction orthogonal to the direction in which the recording paper P is discharged are provided on the wall 21. Is provided around the rotary shaft 23. The protrusion 22 serves to regulate the position of one side of the paper discharge driven roller 56. Here, the rotating shaft 23 and the protrusion 22 are formed by deforming the wall 21 portion so as to form the circular groove 27 and the circular groove 28 by pressing with a punch or the like from the back side of the wall 21. ing.

  On the other hand, the bent portion 24 and the bent portion 25 are provided at three locations that play a role of position control of the surface of the discharge driven roller 56 whose position is restricted by the protrusion 22 and the opposite surface. This is the protrusion 26. The bending portion 24 is formed by bending a part of the paper discharge frame 30 obliquely. The bent portion 25 is formed by bending the paper discharge frame 30 into a shape as shown in the figure. From this state, the bending portion 25 is further bent in the direction of the arrow indicated by S while the discharge driven roller 56 is pivotally supported on the rotary shaft 23, so that the state shown in FIG. The paper discharge driven roller 56 is attached.

  FIG. 5 is a perspective view showing the discharged paper driven roller mounting device with the discharged paper driven roller 56 attached in the first embodiment. The paper discharge driven roller 56 includes a spur 11 having a star shape having a plurality of teeth 13 on the peripheral surface of the disk, and a bearing portion 12 that is rotatably supported by the rotary shaft 23. The part 12 is integrally formed of a single metal member. The bearing portion 12 has a through-hole 14 for rotatably supporting the paper discharge driven roller 56 on the rotary shaft 23, and has a shape protruding to one side of the spur 11.

  In the present embodiment, the discharge driven roller 56 has a bearing 12 formed by burring a tempered stainless steel member SUS304, and a plurality of teeth 13 are formed by punching and crushing. Is formed. Here, the term “tempering” means quenching and tempering of the metal member, thereby making the metal member a hard and sticky material. The burring process is a process for expanding the edge of the hole formed in the material plate into a cylindrical shape with a punch of a press, and is a known processing technique.

  The paper discharge driven roller 56 is pivotally supported on the rotary shaft 23 so as to be able to rotate in accordance with the paper discharge of the recording paper P in the sub-scanning direction Y that is the paper discharge direction of the recording paper P. Further, as described above, the five protrusions 22 provided on the wall 21 serve to regulate the position of one side of the paper discharge driven roller 56, and are provided at the bending portion 24 and the bending portion 25 at three locations. The projected portion 26 serves to regulate the position of the other surface on the opposite side. That is, the first position restricting portion is constituted by the protruding portion 22 provided on the wall 21, the bent portion 24, and the protruding portion 26 provided on the bent portion 25. The discharge driven roller mounting apparatus according to the first embodiment described above is configured by bending all of the components except the discharge driven roller 56 by bending a part of the discharge frame 30. .

  As described above, the first position restricting portion that restricts the position in the direction orthogonal to the direction in which the recording paper P is discharged is configured by bending a part of the discharge frame made of a metal member. Therefore, unlike the conventional discharge driven roller mounting apparatus using injection molded resin parts, it is not necessary to provide a taper and a parallel position regulating surface without a taper can be formed on both sides of the discharge driven roller 56. It becomes possible. Therefore, the position of the paper discharge driven roller 56 can be regulated with high accuracy.

  Further, since the discharge driven roller mounting device is integrally formed by bending a part of the discharge frame 30 made of a metal member, the discharge driven roller mounting device is disposed between the discharge frame 30 and the discharge driven roller mounting device. There is no backlash, which reduces the backlash of the paper discharge driven roller 56. Accordingly, it is possible to provide a paper discharge driven roller mounting device that can reduce the backlash of the paper discharge driven roller 56 and can regulate the position and posture of the paper discharge driven roller with high accuracy.

  Further, the paper discharge driven roller 56 is integrally formed of only a metal member and is pivotally supported by a protrusion 23 formed by bending the paper discharge frame 30 made of a metal member. The paper driven roller 56 and the paper discharge frame 30 are electrically connected. Accordingly, static electricity generated by friction between the surface of the recording paper P and the paper discharge driven roller 56 is discharged to the paper discharge frame 30 without being accumulated in the recording paper P and the paper discharge driven roller 56. The influence can be reduced.

  FIG. 6 is a perspective view showing a second embodiment of the discharged paper driven roller mounting device according to the present invention. For easy understanding of the configuration, a state before the discharge driven roller 56 and the bar spring 41 are attached is shown. FIG. 7 is a perspective view showing the discharged paper driven roller mounting device in a state where the discharged paper driven roller 56 and the bar spring 41 are mounted in the second embodiment. Hereinafter, a description will be given with reference to FIGS. 6 and 7.

  The first support portion 31 formed by bending a part of the paper discharge frame 30 at an angle of 90 degrees has a fitting portion 32. The fitting portion 32 has a constricted projection shape at the base, and one end portion of a bar spring 41 having a ring shape is fitted, and one end portion of the bar spring 41 is fixed and supported. Further, a second support that is formed by bending a part of the sheet discharge frame 30 at an angle of 90 degrees in a direction facing the first support portion 31 and forms a wall surface parallel to the first support portion 31. A through hole 34 is formed in the portion 33. The end of the bar spring 41 opposite to the end that is fixedly supported by the first support portion 31 is supported in the through hole 34 in a loosely inserted state.

  In the paper discharge driven roller 56, the spur 11 and the bearing portion 12 are integrally formed of a single metal member, and the bearing portion 12 rotatably supports the paper discharge driven roller 56 on the bar spring 41. The through hole 14 is formed, and the spur 11 has a shape protruding to one side.

  The bar spring 41 pivotally supports the paper discharge driven roller 56 in the sub-scanning direction Y, which is the paper discharge direction of the recording paper P, so that it can rotate following the discharge of the recording paper P, as described above. Both ends of the first support portion 31 and the second support portion 33 are supported and attached.

  On the other hand, the second position restricting portion 35 bends and raises a part of the sheet discharge frame 30 at an angle of 90 degrees in a direction orthogonal to the bending direction of the first support portion 31 and the second support portion 33. And a pair of walls parallel to the bar spring 41 are arranged on both sides of the spur 11, respectively. The second position restricting portion 35 is formed at a position sandwiching the bearing portion 12 of the paper discharge driven roller 56 from both sides, and is in contact with the bearing portion 12 of the paper discharge driven roller 56 to record on the paper discharge driven roller 56. The position in the sub-scanning direction Y that is the paper discharge direction is directly regulated.

  In this manner, the bending direction of the pair of opposed walls constituting the first support portion 31 and the second support portion 33 is orthogonal to the bending direction of the pair of opposed walls of the second position restricting portion. By being in the bent direction, the processing accuracy of the discharge driven roller mounting portion and the second position regulating portion can be easily obtained.

  Further, by restricting the position of the bearing portion 12 of the discharge driven roller 56 by the second position restricting portion 35, it is possible to directly restrict the position of the discharge driven roller 56 supported by the bar spring 41. Since the position of the discharge driven roller 56 is indirectly regulated by restricting the position of the bar spring 41 as in the prior art, rattling of the discharge driven roller 56 is reduced. It becomes possible to do. As a result, it becomes possible to provide a discharge driven roller mounting device that can reduce the position of the discharge driven roller 56 and the posture of the discharge driven roller 56 with high accuracy.

  Further, the position of the bearing portion 12 of the discharge driven roller 56 is regulated by a pair of parallel walls facing each other from both sides with the bar spring 41 interposed therebetween, and at the same time, the pair of walls are on both sides with the spur 11 being sandwiched. By disposing each, the position of the bearing portion 12 can be regulated regardless of which direction the bearing portion 12 protrudes to one side of the paper discharge driven roller 56 is.

  The paper discharge driven roller 56 is integrally formed of only a metal member and is pivotally supported by a bar spring 41 made of a metal member. The bar spring 41 bends the paper discharge frame 30 made of a metal member. Accordingly, the discharge driven roller 56 and the discharge frame 30 are electrically connected to each other because they are supported by the first support portion 31 and the second support portion 33 configured as described above. Accordingly, as in the first embodiment described above, static electricity generated by friction between the surface of the recording paper P and the paper discharge driven roller 56 is not accumulated on the recording paper P and the paper discharge driven roller 56. Since the paper discharge frame 30 is discharged, the influence of static electricity can be reduced.

  On the other hand, the first position restricting portion for restricting the position of the discharge driven roller 56 in the direction orthogonal to the sub-scanning direction Y, which is the discharge direction of the recording paper P, is the second position restriction in the present embodiment. The portion 35 is configured by a total of eight protrusions 36 provided at two locations on the portion 35 facing the spur 11. The four protrusions 36 provided on one side of the spur 11 are disposed so as to abut on one side of the spur 11 evenly. The four protrusions 36 provided on the other side of the spur 11 are disposed at substantially equal intervals so as to be in contact with the other surface of the spur 11 evenly.

  The first position restricting portion includes four sub-protrusions 36 arranged on both sides of the spur 11 and abutting both side surfaces of the spur 11 so that the recording paper P is discharged in the sub-scanning direction Y. The position of the paper discharge driven roller 56 with respect to the orthogonal direction is regulated.

  As described above, the first position restricting portion is configured by the second position restricting portion 35 and the protrusion 36 provided on the second position restricting portion 35. In this configuration, part of the first position restricting portion is formed. Therefore, by providing the protrusions 36 on the pair of walls facing each other from both sides with the bar spring 41 in between and parallel to the bar spring 41, the first position restricting part and the second position restricting part 35 can be bent little. It becomes possible to construct efficiently by processing.

  As described above, according to the paper discharge driven roller mounting device according to the present invention, the paper discharge driven roller 56 is less rattling and the position and posture of the paper discharge driven roller 56 can be set with high accuracy. It becomes possible to regulate.

  It should be noted that the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

  According to the present invention, in the ink jet type recording apparatus, the discharge driven roller mounting apparatus that can control the position and posture of the discharged paper driven roller with high accuracy with less shakiness of the discharged paper driven roller can be recorded. Stable paper discharge with little risk of damaging the paper recording surface is possible.

1 is a schematic plan view showing an ink jet recording apparatus according to the present invention. 1 is a schematic side view showing an ink jet recording apparatus according to the present invention. It is the perspective view which showed 1st Embodiment of the paper discharge driven roller attachment apparatus which concerns on this invention. It is the perspective view which showed 1st Embodiment of the discharge driven roller attachment apparatus which concerns on this invention from the angle different from FIG. FIG. 3 is a perspective view showing the discharged paper driven roller mounting device with the discharged paper driven roller attached in the first embodiment of the discharged paper driven roller mounting device according to the present invention. It is the perspective view which showed 2nd Embodiment of the paper discharge driven roller attachment apparatus which concerns on this invention. FIG. 6 is a perspective view showing a discharged paper driven roller mounting device in a state where a discharged paper driven roller and a bar spring are mounted in a second embodiment of the discharged paper driven roller mounting device according to the present invention; It is the perspective view which showed the aspect of the paper discharge driven roller attachment apparatus by a prior art.

Explanation of symbols

11 spurs, 12 bearings, 13 teeth, 14 through-holes, 21 walls, 22, 26 projections, 23 rotating shafts, 24, 25 bent parts, 27, 28 circular grooves, 30 paper discharge frame, 31 first support part , 32 fitting portion, 33 second support portion, 34 through-hole, 35 second position restricting portion, 36 protrusion (first position restricting portion), 41 bar spring, 42 mounting portion, 50 recording device, 55 Paper discharge driving roller, 56 Paper discharge driven roller, P Recording paper

Claims (2)

A discharge driven roller mounting portion that rotatably contacts the recording surface of the recording sheet via the rotation shaft and is rotatably supported by the discharge of the recording sheet;
A first position restricting portion for restricting the position of the discharge driven roller in the rotation axis direction from both sides of the discharge driven roller;
Regulation position of the discharging driven roller in a direction in which the recording paper is discharged, includes a second position regulating portion performed by regulating the position of the shaft receiving portion of the paper discharge driven roller directly, and
The discharge driven roller is rotatably supported by a bar spring formed of a star-shaped spur having a plurality of teeth on a peripheral surface of a disc and a metal member forming the rotation shaft, and is at least on one side of the spur is constituted by said bearing portion having a shape protruding, and the spur and the bearing portion are integrally formed by only the metal member,
The paper discharge driven roller mounting portion is configured by bending a part of a paper discharge frame made of a metal member,
The second position restricting portion is a pair of parallel walls formed by bending a part of the paper discharge frame, perpendicular to the conveyance direction of the recording paper, and in contact with the bearing portion, A pair of parallel walls are respectively arranged on both sides across the spur,
A discharge driven roller mounting device according to claim 1, wherein a part of the second position restricting portion constitutes the first position restricting portion.   An ink jet recording apparatus comprising the discharge driven roller mounting device according to claim 1.

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