JP2006043961A - Laser beam printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laser beam printer which is equipped with an openable/closable rear door 1 enhancing productivity. <P>SOLUTION: This laser beam printer is equipped with the openably/closably formed rear door 1 and a roller frame 2 which includes a supporting shaft 25 serving as a shaft for opening/closing the rear door 1. The roller frame 2 includes a locking-part guide hole 14; and the rear door 1 comprises a locking part 12 which is formed to be inserted into the guide hole 14, and a fitting part 21 which is fitted into the supporting shaft 25 from an opening 16 and formed to turnably hold the supporting shaft 25. the guide hole 14 is formed in accordance with the motion of the locking part 12, associated with the opening/closing motion of the rear door 1. The supporting shaft 25 is formed in such a shape as to have two planar parts obtained by cutting a cylindrical shape with horizontal planes parallel to each other, and the fitting part 21 is formed in the state of making a surface of the rear door 1 almost horizontal and horizontally directing the opening 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a laser beam printer.

  Laser beam printers perform printing by placing toner in a predetermined shape on a substrate. FIG. 9 shows an example of a schematic sectional view of a laser beam printer. Each component of the laser beam printer is disposed inside the housing 40. A paper tray 38 on which paper, cellophane, or the like as a printed material is disposed is disposed at the lower portion of the housing 40. A pick roller 31 for taking out paper or the like from the paper tray 38 is disposed above the end of the paper tray 38. The pick roller 31 is supported by the roller frame 2. The roller frame 2 is fixed to the housing 40. Paper or the like is conveyed along the conveyance path 71 in the direction indicated by the arrow 61.

  Around the conveyance path 71, a conveyance roller 32 for conveying paper and the like, a photosensitive drum 42 and a transfer roller 41 for arranging toner in a desired shape on the surface of the paper and the like are arranged. Around the conveyance path 71, a fixing roller 33 for fixing toner disposed on the surface to paper or the like is disposed.

  A toner cartridge 39 is disposed at a substantially central portion of the housing 40. The toner cartridge 39 is filled with toner. The toner cartridge 39 is formed so that it can be replaced. When the toner is insufficient, the toner cartridge 39 can be replaced. In FIG. 9, the right side is the front side of the printer, and the printed material such as paper is formed to be discharged toward the front side.

  The photosensitive drum 42 is disposed on the rear side inside the housing 40. The photosensitive drum 42 is disposed so as to contact the developer roll 34. Various rollers such as the transfer roller 41, the photosensitive drum 42, and the developer roll 34 are formed in a cylindrical shape.

  In FIG. 9, paper and the like are taken out from the paper tray 38 one by one by the pick roller 31, and conveyed to the photosensitive drum 42 by the conveying roller 32. By rotating the developer roll 34, the toner disposed inside the toner cartridge 39 is supplied to the photosensitive drum 42. On the surface of paper or the like, toner is arranged in a printing shape while being sandwiched and conveyed between the photosensitive drum 42 and the transfer roller 41.

  The paper or the like that has passed through the portion sandwiched between the transfer roller 41 and the photosensitive drum 42 is conveyed toward the fixing roller 33. When the paper on which the toner is arranged contacts the fixing roller 33, the arranged toner is fixed on the paper or the like. Thereafter, it is transported to the take-out port by a transport roller or the like. In this way, printing is performed on a substrate such as paper.

  In FIG. 9, the rear door 1 is formed in the housing 40 on the back side of the laser beam printer. The rear door 1 is formed so as to cover the back side of the laser beam printer. The rear door 1 is supported by a roller frame 2. The rear door 1 is formed to be openable and closable as indicated by an arrow 62. The opening / closing angle of the rear door 1 is formed so that the rear door can be opened from 0 ° where the rear surface of the rear door is parallel to the vertical direction to almost 80 ° where the rear surface of the rear door 1 is slightly inclined from the horizontal direction. ing.

  When a paper jam or the like occurs in the transport path 71, the rear door 1 is opened and the paper jammed inside is removed. Further, when various components such as the conveyance roller 32 break down, the rear door 1 is opened so that the inside can be repaired. As described above, the laser beam printer is formed so that inspection and repair of the inside of the housing can be performed by opening the rear door 1.

  In FIG. 10, the perspective view of the part of a rear door and a roller frame is shown. FIG. 10 is a perspective view when viewed from the inside of the laser beam printer. The roller frame 2 is formed so as to extend in the width direction of the laser beam printer. In the roller frame 2, a pick roller insertion portion 10 for inserting a pick roller is formed at a substantially central portion in the width direction. The rear door 1 is formed to extend in the width direction of the laser beam printer. A rib portion 45 for increasing the strength of the rear door 1 is formed inside the rear door 1. The rear door 1 and the roller frame 2 are connected at the connection part A. While the roller frame 2 is fixed to the casing, the rear door 1 opens and closes with the connection portion as a support shaft as indicated by an arrow 63.

  FIG. 11 shows an enlarged perspective view of a portion A in FIG. FIG. 11 is a perspective view when the rear door is opened. The roller frame 2 includes a support shaft 55 for supporting the rear door 1. FIG. 12 is a perspective view of the support shaft 55. The support shaft 55 is formed in a cylindrical shape and is formed so as to protrude from the surface of the roller frame 2.

  The rear door 1 includes a fitting portion 21 formed so as to hold the support shaft 55. The fitting portion 21 is formed so as to grip a support shaft 55 formed on the roller frame 2. The fitting portion 21 has an opening 46 for fitting the support shaft 55.

  The rear door 1 is formed to open and close with a support shaft 55 as a rotation axis as indicated by an arrow 63. A locking portion guide hole 14 is formed in the roller frame 2. A locking portion 12 is formed in the rear door 1. The locking part 12 is inserted into the locking part guide hole 14.

  FIG. 13 is a perspective view of the locking portion 12 and the locking portion guide hole 14 of the roller frame 2 when viewed from the inside of the laser beam printer. The locking part 12 includes a locking projection 13 at the tip. A locking projection 13 is inserted into the locking portion guide hole 14. The locking portion 12 is formed integrally with the rear door 1. The locking projection 13 of the locking portion 12 also moves in accordance with the movement of the rear door 1 that opens and closes indicated by the arrow 63.

  The locking portion guide hole 14 is formed along the movement of the locking projection 13. The locking portion guide hole 14 is formed so that the locking projection 13 contacts the end surface of the locking portion guide hole 14 when the rear door 1 is opened to an angle of approximately 80 °. A contact portion 11 is formed on the roller frame 2 so that the rear door 1 and the contact portion 11 come into contact with each other when the rear door 1 is closed (at 0 °).

As a mounting structure for the rear side portion of the housing, in Japanese Patent Application Laid-Open No. 10-145057, a bracket as a fitting edge for positioning the cover in each of the three-dimensional directions and a bracket formed on the cover are fitted with the bracket. Thus, there is disclosed a mounting structure for a housing having a hook portion for positioning the cover in three-dimensional directions with respect to the main body substrate. According to this structure, it is disclosed that assembly and disassembly are easy, the number of parts can be reduced, and each safety standard can be easily satisfied.
Japanese Patent Laid-Open No. 10-145057

  The rear door mounting structure shown in FIGS. 10 to 13 has a configuration in which the fitting portion 21 is fitted to the support shaft 55 as shown in FIG. The opening / closing angle of the rear door 1 is limited by a locking portion 12 inserted into a locking portion guide hole 14 formed in the roller frame 2.

  When the rear door 1 is attached to the roller frame 2, as shown by an arrow 67 in FIG. 13, the locking portion 12 is pushed inward of the laser beam printer so that the locking projection 13 is inserted into the locking portion guide hole 14. insert. Along with the insertion of the locking projection 13, the rear door fitting portion is fitted to the support shaft of the roller frame.

  FIG. 14 shows a side view when the fitting portion is fitted into the support shaft. The support shaft 55 is formed so that the shape of the side surface is circular, and the fitting portion 21 is formed along the circular shape. The fitting portion 21 has an opening 46 for fitting the support shaft 55. The fitting portion 21 is fitted into the support shaft 55 as indicated by an arrow 68. When fitting the fitting part 21, the opening 46 at the tip of the fitting part 21 is widened as indicated by an arrow 69.

  As described above, when the rear door is mounted on the roller frame, the rear door locking portion must be pressed inward, and the rear door fitting portion must be fitted to the support shaft formed on the roller frame. Therefore, there is a problem that the workability of assembling the rear door and the roller frame is poor and the productivity is poor.

  In the above-mentioned Japanese Patent Application Laid-Open No. 10-145057, a casing capable of removing a part of the casing can be provided, but a part of the casing is completely removed. There was a problem that it was unsuitable for body structure. In particular, this housing structure has a problem that it is not suitable for a rear door of a laser beam printer that is sometimes opened and closed to repair a paper jam.

  SUMMARY An advantage of some aspects of the invention is that it provides a laser beam printer including a rear door that can be opened and closed to improve productivity.

  In order to achieve the above object, a laser beam printer according to the present invention includes a surface serving as a back surface of a laser beam printer, and the surface is opened and closed within a range from a vertical state to a state of approximately 80 ° with respect to the vertical direction. A rear door formed in a possible manner, and a roller frame including a support shaft serving as a shaft for opening and closing the rear door. The roller frame includes a locking portion guide hole, and the rear door is fitted into the locking portion formed so as to be inserted into the locking portion guide hole and the support shaft from the opening, and the support shaft is And a fitting portion formed so as to be held rotatably. The locking portion guide hole is formed so as to follow the movement of the locking portion that accompanies the movement of the rear door opening and closing, and the support shaft has two plane portions obtained by cutting a cylindrical shape by horizontal planes parallel to each other. The fitting portion is formed so that the opening portion faces the horizontal direction with the surface of the rear door being substantially horizontal. By adopting this configuration, it is possible to provide a laser beam printer including the rear door that can be opened and closed to improve productivity.

  In order to achieve the above object, a laser beam printer according to the present invention includes a rear door that includes a rear surface of the laser beam printer and is configured to be openable and closable, a frame formed to support the rear door, and the rear door. Angle limiting means for limiting the opening / closing angle of the. The rear door and the frame are connected to each other by a support shaft formed on one side and a fitting portion formed on the other side and formed to grip the support shaft. An opening for fitting, and the support shaft has a planar portion in which a part of a columnar shape is cut out, and the direction of the opening and the plane are outside the limited range of the opening / closing angle. The direction of the surface of the part is formed to be substantially the same. By adopting this configuration, it is possible to provide a laser beam printer including the rear door that can be opened and closed to improve productivity.

  Preferably, in the above invention, the support shaft is formed to have two plane portions obtained by cutting a cylindrical shape by planes parallel to each other, and the distance between the two plane portions and the width of the opening portion are substantially the same. It is formed to become. By adopting this configuration, it is possible to provide a laser beam printer including the rear door that can be easily inserted into the support shaft and can be easily assembled.

  ADVANTAGE OF THE INVENTION According to this invention, the laser beam printer provided with the rear door which can be opened and closed and productivity improves can be provided.

(Constitution)
A laser beam printer according to an embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 9, the transfer roller 41 and the toner cartridge 39 are arranged inside the housing 40, and the toner is arranged along the conveyance path 71 as the paper or the like is conveyed as indicated by an arrow 61. Is similar to a laser beam printer based on the prior art. The rear door 1 is disposed on the back surface of the housing 40, and the roller frame 2 is disposed on the back surface inside the housing 40, as in the laser beam printer in the prior art.

  FIG. 1 shows an enlarged perspective view of a connecting portion between the rear door and the roller frame in the present embodiment. FIG. 1 is a perspective view when the rear door 1 is fully opened. The rear door 1 is open until the surface of the rear door 1 which is the back surface of the laser beam printer has an angle of approximately 80 ° with respect to the vertical direction.

  In the present embodiment, the rear door 1 and the roller frame 2 are each formed of resin. Connection portions between the rear door 1 and the roller frame 2 are formed on both sides in the width direction of the laser beam printer. That is, the rear door 1 is supported by the roller frame 2 at two places. The connecting portions on both sides have the same configuration.

  The roller frame 2 as a frame that supports the rear door is formed with a support shaft 25 that serves as a shaft for opening and closing the rear door 1. FIG. 2 is a perspective view of the support shaft 25 in the present embodiment. The support shaft 25 is formed to have two flat portions 17 obtained by cutting a cylindrical shape by planes parallel to each other. In the present embodiment, each plane portion 17 is formed to be horizontal. The support shaft 25 is formed so as to protrude from the surface of the roller frame 2. The support shaft 25 is formed so as to be directed to the side of the laser beam printer. The support shafts 25 are formed on both sides in the width direction of the laser beam printer.

  Referring to FIG. 1, as an angle limiting means for limiting the opening / closing angle of the rear door, a locking portion guide hole 14 is formed in the roller frame 2, and the rear door 1 is inserted into the locking portion guide hole 14. The latching | locking part 12 is formed in this. The locking portion guide hole 14 is formed along the movement of the locking portion 12 that moves together with the rear door 1 when the rear door 1 is opened and closed as indicated by an arrow 63.

  FIG. 3 shows a side view of the locking portion guide hole. In the present embodiment, the locking portion guide hole 14 is formed in a band shape so as to have a width corresponding to the width of the locking portion 12. The locking portion guide hole 14 is formed in an arc shape centered on the axis of the support shaft. The center angle θ of the arc shape corresponds to the opening / closing angle of the rear door. In the present embodiment, the angle θ is formed to be approximately 80 °.

  In the present embodiment, the rear door can be opened and closed within the range from the state in which the rear surface of the laser beam printer is parallel to the vertical direction (0 °) to the state of approximately 80 ° with respect to the vertical direction. Is formed. In other words, the rear door is arranged so that the direction in which the rear door is disposed can be opened and closed within a range of approximately 80 ° from the vertical direction to the vertical direction.

  When the rear door is completely closed, the locking portion guide hole 14 is brought into contact with one end of the locking portion guide hole 14, and when the rear door is completely opened, the locking portion 12 is It is formed so as to come into contact with the other end of the locking portion guide hole 14.

  As shown in FIG. 1, the rear door 1 includes a fitting portion 21 formed to hold the support shaft 25. The fitting portion 21 is formed so that the rear door 1 is rotatable about the support shaft 25 as a rotation axis. The fitting portion 21 has an opening 16 for inserting the support shaft 25, and an inner surface is formed so that the cross section of the support shaft 25 corresponds to an arcuate curved surface. The fitting portion 21 is formed so as to grip the support shaft 25. The fitting portions 21 are formed on both sides of the laser beam printer in the width direction.

  In FIG. 4, the side view of the spindle and fitting part in this Embodiment is shown. The support shaft 25 has a shape obtained by cutting a part of a circle. The fitting portion 21 is formed such that the inner surface is along the arc shape of the side surface of the support shaft 25, and the opening 16 is formed at the tip. The fitting portion 21 has a shape that sandwiches the support shaft 25.

  The fitting portion 21 is formed so that the opening 16 faces in the horizontal direction with the surface of the rear door, which is the back surface of the laser beam printer, being substantially horizontal. That is, the opening 16 is formed to face the horizontal direction in a state where the rear door extends in a substantially horizontal direction. Further, the support shaft is formed so that the plane portion 17 is substantially parallel to the horizontal direction.

  In FIG. 1, the rear door and the roller frame are connected in a state where the opening 16 of the fitting portion 21 is inclined by about 10 ° with respect to the horizontal plane. Thus, outside the range of the opening / closing angle, the direction of the opening of the fitting portion and the direction of the surface of the flat portion of the support shaft are formed to be substantially the same.

  As shown in FIG. 4, in the present embodiment, the width 82 of the opening 16 at the tip of the fitting portion 21 and the distance 81 between the two flat portions 17 of the support shaft 25 are substantially the same. Is formed.

  FIG. 5 is a perspective view when the rear door 1 is moved in the direction indicated by the arrow 63 and the rear door 1 is completely closed. That is, it is an enlarged perspective view when the opening / closing angle of the rear door 1 is 0 °. The locking projection 13 of the locking portion 12 inserted into the locking portion guide hole 14 is in contact with the end of the locking portion guide hole 14. The opening 16 of the fitting portion 21 is disposed downward in the vertical direction. The support shaft 25 does not change its orientation. A contact portion 11 is formed on the roller frame 2 so that the rear door 1 contacts when the rear door 1 is closed.

(Action / Effect)
In FIG. 9, paper or the like is transported along the transport path 71, and printing is performed in the middle of the transport, similar to the laser beam printer based on the conventional technology. In addition, when a failure such as a paper jam occurs, the rear door is opened to cope with it as in the case of the laser beam printer based on the conventional technology.

  Referring to FIGS. 1 and 5, rear door 1 is formed so as to be openable and closable as indicated by arrow 63, with the axis of support shaft 25 as a rotation axis. The locking projection 13 of the locking part 12 moves inside the locking part guide hole 14 as the rear door 1 is opened and closed.

  As shown in FIG. 5, the locking projection 13 abuts against one end of the locking portion guide hole 14 when the rear door 1 is completely closed (when the opening / closing angle is 0 °). Further, as shown in FIG. 1, when the rear door 1 is completely opened (when the opening / closing angle is approximately 80 °), the locking projection 13 abuts against the other end of the locking portion guide hole 14. . Thus, the opening / closing angle of the rear door 1 is limited by restricting the movement of the locking portion 12 by the locking portion guide hole 14.

  At the time of assembling the laser beam printer, the rear door is arranged so that the surface of the rear door (the direction in which the rear door extends) that becomes the back surface of the laser beam printer is substantially horizontal. FIG. 6 shows a side view of the support shaft 25 and the fitting portion 21 at this time.

  In FIG. 6, the fitting portion 21 is inserted into the support shaft 25 in the direction indicated by the arrow 64. Since the flat portion 17 is formed on the support shaft 25, it is not necessary to widen the opening 16 at the tip of the fitting portion 21, and the fitting portion 21 can be easily fitted to the support shaft 25.

  The fitting portion is inserted into the support shaft 25 and the locking portion 12 formed on the rear door 1 is pressed toward the inside of the laser beam printer (see FIG. 13). Next, the rear door is rotated as shown by an arrow 65 in FIG. 7, and the locking portion 12 is fitted into the locking portion guide hole 14 as shown in FIG.

  FIG. 8 shows a side view when the connection between the rear door and the roller frame is completed. FIG. 8A is a side view when the rear door is completely opened (opening / closing angle is approximately 80 °), and FIG. 8B is a side view when the rear door is completely closed (opening / closing angle is 0 °). It is a side view. The fitting part 21 moves in the direction of the arrow 65 with the movement of closing the rear door. The fitting part 21 moves in the direction of the arrow 66 with the movement of opening the rear door.

  From the state in which the rear door is completely closed to the state in which the rear door is completely opened, the direction of the opening 16 of the fitting part 21 and the direction of the surface of the flat part 17 of the support shaft 25 are not the same direction. The rear door can be prevented from coming off. As described above, since the direction of the opening of the fitting portion and the direction of the surface of the plane portion of the support shaft are substantially the same outside the range of the opening / closing angle of the rear door, assembly is easy. Therefore, it is possible to provide a laser beam printer that can improve the productivity. Further, it is possible to provide a laser beam printer in which the openable / closable rear door does not come off after assembly.

  As shown in FIG. 4, in the present embodiment, the distance 81 between the flat portions 17 of the support shaft 25 and the width 82 of the opening portion 16 of the fitting portion 21 are formed to be substantially the same. Yes. By adopting this configuration, the fitting portion can be inserted into the support shaft without opening the opening, and the fitting portion can be prevented from being detached from the support shaft after assembly.

  In the present embodiment, the support shaft includes two plane portions. However, the support shaft is not particularly limited to this configuration, and there may be one plane portion. Or more plane parts may be formed. In the embodiment, the roller frame is formed as a frame for supporting the rear door. However, the present invention is not limited to this form and can be applied to any frame.

  Further, in the present embodiment, the fitting portion is formed on the rear door and the support shaft is formed on the frame. However, the present invention is not limited to this, and the support shaft is formed on the rear door and the fitting portion is formed on the frame. It may be formed. Further, in the present embodiment, the opening / closing angle of the rear door is 0 ° or more and almost 80 ° or less. However, the present invention is not limited to this embodiment, and the present invention is applied to a laser beam printer having an arbitrary opening / closing angle of the rear door. can do.

  In addition, the said embodiment disclosed this time is an illustration in all the points, Comprising: It is not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and includes all modifications within the scope and meaning equivalent to the terms of the claims.

It is a 1st expansion perspective view of the connection part of the rear door and roller frame in an embodiment based on the present invention. It is an expansion perspective view of the spindle in the embodiment based on the present invention. It is a side view of the latching | locking part guide hole in embodiment based on this invention. It is a side view of the spindle and fitting part in an embodiment based on the present invention. It is a 2nd expansion perspective view of the connection part of the rear door and roller frame in embodiment based on this invention. It is a 1st side view explaining the connection of the fitting part and spindle in embodiment based on this invention. It is a 2nd side view explaining the connection of the fitting part and spindle in embodiment based on this invention. (A) And (b) is a side view explaining the effect | action of a fitting part and a spindle in embodiment based on this invention. It is a schematic sectional drawing of a laser beam printer. It is a perspective view of the part of the roller frame and rear door of a laser beam printer. It is an expansion perspective view of the connection part of the rear door and roller frame based on the prior art. It is an expansion perspective view of the spindle based on the prior art. It is an expansion perspective view explaining the effect | action of a latching | locking part and a latching | locking part guide hole. It is a side view when inserting the fitting part based on a prior art into a spindle.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Rear door, 2 roller frame, 10 pick roller insertion part, 11 contact part, 12 latching part, 13 latching protrusion part, 14 latching part guide hole, 16, 46 opening part, 17 plane part, 21 fitting part 25, 55 Support shaft, 31 Pick roller, 32 Transport roller, 33 Fixing roller, 34 Developer roll, 38 Paper tray, 39 Toner cartridge, 40 Housing, 41 Transfer roller, 42 Photosensitive drum, 45 Rib portion, 61- 69 arrow, 71 transport path, 81 distance, 82 width.

Claims (3)

A rear door including a surface to be a back surface of the laser beam printer, the surface being formed to be openable and closable within a range from a vertical state to a state of approximately 80 ° with respect to the vertical direction;
A roller frame including a support shaft serving as a shaft for opening and closing the rear door;
The roller frame includes a locking portion guide hole,
The rear door has a locking portion formed to be inserted into the locking portion guide hole,
A fitting portion that is fitted into the support shaft from an opening and formed to hold the support shaft rotatably;
The locking portion guide hole is formed so as to follow the movement of the locking portion accompanying the movement of the rear door opening and closing.
The support shaft is formed to have two plane portions obtained by cutting a cylindrical shape by horizontal planes parallel to each other,
The fitting portion is a laser beam printer formed so that the opening portion faces in a horizontal direction with the surface of the rear door being substantially horizontal. A rear door including a surface to be the back of the laser beam printer, and formed to be openable and closable
A frame formed to support the rear door;
Angle limiting means for limiting the opening and closing angle of the rear door,
The rear door and the frame are connected to each other by a support shaft formed on one side and a fitting portion formed on the other side and formed to grip the support shaft,
The fitting portion has an opening for fitting the spindle.
The support shaft has a plane portion in which a part of a cylindrical shape is cut out,
The laser beam printer, wherein the direction of the opening and the direction of the surface of the flat part are substantially the same outside the limited opening / closing angle range. The support shaft is formed to have two flat portions obtained by cutting a cylindrical shape by planes parallel to each other.
The laser beam printer according to claim 2, wherein a distance between the two flat portions and a width of the opening are formed to be substantially the same.

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