JP2013057832A - Document reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a document reader able to prevent damage to a guide part without degrading the operability of a user when a document cover is closed while a guide part projects from the bottom part of the document cover.SOLUTION: In the document cover 101, an opening/closing unit 7 is formed on the bottom facing a document table 102a. The opening/closing unit 7 is rotated round a second rotation shaft 74 intersecting a first rotation shaft. Thereby the unit 7 can be switched between an opening state in which the inside of the document cover 101 is exposed and the closed state in which it is accommodated in the document cover 101. When the document cover 101 is closed while the opening/closing unit 7 is open, a first taper face 751 is first brought into contact with the ridge line 21a of the upper end of a reference face 21. The first taper face moves over the ridge line 21a.

Description

  The present invention relates to a document reading apparatus, and more particularly, to an improvement of a document reading apparatus in which a document cover and a flat bed portion are connected so as to be openable and closable.

  Some document reading apparatuses in which the document table is covered with an openable / closable document cover can open and close the bottom of the document cover. For example, in a document reading apparatus having an ADF device that automatically transports a document with a transport path formed in the document cover, a guide unit that guides the document on the transport path is disposed at the bottom of the document cover, and this guide unit can be opened and closed. It is configured.

  In such a document reading device, when the automatic document transport is stopped, the document remaining on the transport path in the document cover can be easily taken out. However, when the guide unit is opened, the guide unit protrudes from the bottom of the document cover. When the document cover is closed in this state, the tip of the guide unit is caught in the step between the platen glass and the top cover, and the guide unit is There is a risk of being damaged by being pressed by the document cover. In addition, since the step is used for positioning a document placed on the platen glass, the step cannot be eliminated.

  In order to suppress the breakage of the guide unit, for example, it is conceivable that the guide unit is biased by using a spring so that the guide unit is automatically closed. In this case, as long as the guide unit is not held by the user, the guide unit is housed in the document cover by the biasing force of the spring. Therefore, it is possible to prevent the document cover from being closed while the guide unit is open.

  In the configuration in which the guide unit is urged to be closed using a spring, the user needs to always hold the guide unit in order to keep the guide unit open, and it is difficult to take out the document in the conveyance path. There is a problem. Further, since the closed guide unit is not fixed, there is also a problem that the document conveyance state is likely to fluctuate and document jamming is likely to occur.

  The present invention has been made in view of the above circumstances, and the guide unit is not damaged when the document cover is closed with the guide unit protruding from the bottom of the document cover without degrading the operability for the user. An object of the present invention is to provide a document reading apparatus that can be suppressed. It is another object of the present invention to provide a document reading apparatus capable of fixing a closed guide unit when the document cover is closed with the guide unit protruding from the bottom surface of the document cover.

  According to a first aspect of the present invention, there is provided a document reading device including a flat bed reading device having a document table, a document cover covering the document table, and the document cover with respect to the flat bed reading device around a first rotation axis. A hinge part that is connected so as to be openable and closable, and the platen glass is disposed adjacent to the platen glass on which the document is placed, and the side surface exposed from the platen glass is used for positioning the document. A top cover serving as a reference surface, and the document cover has an open / close unit for exposing the inside of the document cover toward the document table on the bottom surface facing the document table, The opening / closing unit is rotated about a second rotation axis that intersects the first rotation axis, thereby opening the opening of the document cover to expose the interior of the document cover and being accommodated in the document cover. A first taper that can transition to a closed state, contacts the ridgeline formed at the upper end of the reference surface first, and rides on the ridgeline when the document cover is closed with the open / close unit in the open state. Configured to have a surface.

  According to such a configuration, when the open / close unit is opened and the document cover is closed, the open / close unit contacts the platen glass. If the document cover is further closed from this state, the contact position on the platen glass moves, eventually approaches the top cover, and the opening / closing unit contacts the ridgeline formed at the upper end of the reference surface. At this time, since the contact surface of the opening / closing unit with respect to the ridgeline is the first tapered surface that rides on the ridgeline, the opening / closing unit can easily get over the reference surface. Therefore, the opening / closing unit can be closed by the operation of closing the document cover, and damage to the opening / closing unit can be suppressed. In addition, since it is not necessary to hold the opening / closing unit in order to keep the opening / closing unit open, the user operability is not deteriorated.

  In the document reading apparatus according to the second aspect of the present invention, in addition to the above configuration, the first tapered surface is parallel to the ridgeline when in contact with the ridgeline, and the top cover side is higher than the platen glass side. So as to be inclined.

  According to such a structure, it can move easily so that the ridgeline of the upper end of a reference plane may be slid on a 1st taper surface. Therefore, the opening / closing unit can easily get over the reference plane.

  In addition to the above configuration, the document reading apparatus according to the third aspect of the present invention is configured such that the platen glass is rectangular and the reference plane is parallel to the second rotation axis.

  According to such a configuration, the reference surface on which the first taper surface should be overcome and the direction in which the first taper surface moves on the document table when the document cover is closed can be made substantially orthogonal. For this reason, it is possible to easily get over the reference surface that the first taper surface gets over compared to the case where the reference surface is orthogonal to the second rotation axis.

  According to a fourth aspect of the present invention, there is provided a document reading apparatus according to the first aspect, wherein the document cover includes a fixing pin, the opening / closing unit opens in a forward direction, and a hook portion is fitted to the fixing pin. A third rotating shaft for rotating the hook portion, and a lever that rotates integrally with the hook portion, the hook portion having a second tapered surface for contacting the fixing pin; When the document cover is closed to the first opening / closing position in the open state of the opening / closing unit, the opening / closing unit rotates in contact with the document table, so that the hook portion moves along the second tapered surface. The fixing pin is slid and rotated to the maximum in the reverse direction around the third rotation axis, and the lever protrudes toward the document table without contacting the document table.

  According to such a configuration, by sliding the fixing pin along the second tapered surface of the hook portion, the hook portion can be rotated to the maximum in the reverse direction and the lever can be protruded toward the document table side. . For this reason, a hook part can be fitted with a fixed pin by simple structure.

  According to a fifth aspect of the present invention, in addition to the above-described configuration, the document reading apparatus includes biasing means for biasing the opening / closing unit to rotate the hook portion in the forward direction. When the document cover is closed from the first opening / closing position to the second opening / closing position, the biasing means is configured to rotate the hook portion in the forward direction so as to be engaged with the fixing pin.

  According to such a configuration, when the first taper is closed to the first opening / closing position, the second tapered surface is in contact with the fixing pin, and when the first taper is closed from the first opening / closing position to the second opening / closing position, the hook portion is used as the fixing pin. Can be fitted. Further, the fitting state between the fixing pin and the hook portion is not easily released, and the state in which the fixing pin and the hook portion are accommodated in the document cover can be maintained even if the document cover is opened thereafter.

  According to a sixth aspect of the present invention, there is provided the document reading device, wherein the lever rotates in contact with the document table when the document cover is closed from the first opening / closing position to the second opening / closing position in the open state of the opening / closing unit. Thus, the hook portion is configured to rotate in the positive direction around the third rotation axis and to be fitted to the fixing pin.

  According to such a configuration, after the document cover is closed to the first opening / closing position, the hook portion can be rotated integrally with the lever, and the hook portion can be fitted to the fixing pin. That is, it is possible to prevent the lever from coming into contact with the document table before it reaches the first opening / closing position and to turn the hook portion, and to be fitted with the fixing pin with high accuracy. In addition, since the hook portion can be rotated and fitted with the fixing pin by the operation of closing the document cover, the operability for the user can be improved.

  In the document reading apparatus according to the present invention, when the opening / closing unit is opened and the document cover is closed, the opening / closing unit contacts the platen glass. If the document cover is further closed from this state, the contact position on the platen glass moves, eventually approaches the top cover, and the opening / closing unit contacts the ridgeline formed at the upper end of the reference surface. At this time, since the contact surface of the opening / closing unit with respect to the ridgeline is the first tapered surface that rides on the ridgeline, the opening / closing unit can easily get over the reference surface. Therefore, the opening / closing unit can be closed by the operation of closing the document cover, and damage to the opening / closing unit can be suppressed. In addition, since it is not necessary to hold the opening / closing unit in order to keep the opening / closing unit open, the user operability is not deteriorated.

  Further, by sliding the fixing pin along the second tapered surface of the hook portion, the hook portion can be rotated to the maximum in the reverse direction and the lever can be protruded toward the document table. For this reason, a hook part can be fitted with a fixed pin by simple structure.

1 is an external view illustrating a configuration example of a document reading apparatus according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating a state in which a document cover 101 of the multifunction peripheral 100 in FIG. 1 is opened. FIG. 3 is a perspective view showing a state in which a left side of a document pressing plate 5 in FIG. 2 is opened. It is the perspective view which showed the external appearance of the guide unit 7 of FIG. It is the figure which showed a mode that the guide unit 7 of FIG. 3 was seen from back. It is the figure which showed the detailed structural example of the contact part 75 of FIG. It is the figure which showed the detailed structural example of the contact part 75 of FIG. FIG. 6 is a perspective view showing a state where the guide unit 7 is opened and the document cover 101 is closed. It is the figure which showed in detail the mode that the taper surface 751 contacted the ridgeline 21a. It is the figure which showed in detail the mode that the taper surface 751 contacted the ridgeline 21a. 3 is a schematic diagram illustrating an example of an internal configuration of a document cover 101. FIG. FIG. 12 is an explanatory diagram showing a state in which the document cover 101 is closed from the state of FIG. 11. FIG. 13 is a schematic diagram showing a state when the document cover 101 is further closed from the state of FIG. FIG. 14 is an explanatory diagram showing a state in which the document cover 101 is further closed from the state of FIG. 13. FIG. 6 is an explanatory view showing a state in which a guide unit is fixed to a document cover.

  FIG. 1 is an external view showing a configuration example of a document reading apparatus according to an embodiment of the present invention. A multifunction machine 100 is shown as an example of a document reading apparatus. A multifunction peripheral (MFP) 100 includes a document cover 101 having an ADF (Auto Document Feeder) device that automatically conveys a document during image reading, and an MFP main body 102 that performs image reading, printing, facsimile transmission / reception, and the like. Composed.

  On the upper part of the MFP main body 102, a document table 102a for placing a document is arranged, and a document cover 101 covering the document table 102a is arranged to be openable and closable. The document on the platen glass 1 is read by a reading device (not shown) inside the document table 102a.

  The document cover 101 includes a document tray 111 and a discharge tray 112, and a conveyance path for automatic conveyance is formed therein. The documents in the document tray 111 are separated and fed one by one, conveyed along the conveyance path, and discharged to the discharge tray 112. This conveyance path is formed so as to pass over the contact glass 3 of the MFP main body 102, and the original is read by a reading device (not shown) inside the original table 102 a when passing over the contact glass 3. That is, the multifunction peripheral 100 can also perform ADF image reading.

  FIG. 2 is a perspective view showing a state in which the document cover 101 of the multifunction peripheral 100 of FIG. 1 is opened. The document table 102 a includes a platen glass 1, a top cover 2, and a contact glass 3. The document cover 101 is connected to the MFP main body 102 via the hinge unit 4, and the document pressing plate 5 and the document exposure port 6 are disposed on the bottom surface of the document cover 101 facing the document table 102 a.

  In the present specification, directions in the document reading apparatus will be described using left and right and front and rear directions as viewed from the operator. That is, the description will be made assuming that the position of the hinge portion 4 is the rear and the positions of the contact glass 3 and the document exposure port 6 are the left hand.

  The hinge unit 4 is a pair of connecting members that connect the document cover 101 and the MFP main body unit 102 in an openable and closable manner, and is attached to the document cover 101 and the rear end of the document table 102a. The document cover 101 can be opened and closed by rotating about the first rotation axis in the left-right direction by the hinge portion 4. The document pressing plate 5 is a rectangular plate for pressing a document placed on the platen glass 1, and the left side thereof can be opened and closed.

  The platen glass 1 is a rectangular glass plate on which a document is placed, and the document is read by moving a scanner unit (not shown) with respect to the placed document. The top cover 2 is a resin cover that surrounds the platen glass 1 and is disposed adjacent to the periphery of the platen glass 1.

  Documents automatically conveyed on the conveyance path in the document cover 101 are sequentially read by a reading device (not shown) inside the document table 102 a through the contact glass 3.

  FIG. 3 is a perspective view showing a state in which the left side of the document pressing plate 5 of FIG. 2 is opened. (A) in a figure is the perspective view shown similarly to FIG. 2, (b) in the figure is the perspective view to which the inside of the broken-line part A of (a) was expanded. The left side of the document pressing plate 5 is attached to a guide unit 7 that can be opened and closed.

  When the guide unit 7 shown in FIG. 2 is closed (hereinafter referred to as “closed state”), the guide unit 7 is accommodated in the document cover 101, and the upper surface of the guide unit 7 forms a document transport path 8. Therefore, when the guide unit 7 in FIG. 3 is opened (hereinafter referred to as an open state), the conveyance path 8 in the document cover 101 can be exposed. That is, if the guide unit 7 is opened when the document conveyance is stopped, the document remaining on the conveyance path 8 can be taken out. At this time, the free end on the left side of the guide unit 7 protrudes toward the document table 102a, and the hinge 4 side of the free end is in contact with the platen glass 1.

  On the hinge part 4 side of the free end of the guide unit 7, a contact part 75 formed to be thicker than the other part of the free end is formed. If the guide unit 7 is opened, this contact part 75 contacts the platen glass 1. If the document cover 101 is closed in this state, the contact position on the platen glass 1 moves to the left and reaches the left end of the platen glass 1. Further, when the document cover 101 is closed, the contact portion 75 gets over the step with the top cover 2 at the left end of the platen glass 1. Therefore, the document cover 101 can be completely closed and the guide unit 7 can be stored in the document cover 101 without damaging the guide unit 7.

  4 and 5 show the guide unit 7 shown in FIG. (A) in a figure is the perspective view which showed a mode that the guide unit 7 was seen from the front left upper direction. FIG. 4B is a plan view of the guide unit 7 as viewed from above, and FIG. 4C is a perspective view of the guide unit 7 as viewed from the rear left upper direction. FIG. 5 is a view showing a state in which the guide unit 7 of FIG. 3 is viewed from the rear.

  The guide unit 7 is an opening / closing unit provided on the bottom surface of the document cover 101, and a rotating shaft 74 connected to the document cover 101 is formed near the right end thereof. The rotating shaft 74 is disposed so as to be substantially orthogonal to the rotating shaft of the hinge portion 4, and the guide unit 7 can be rotated around the rotating shaft 74 to open and close.

  The guide unit 7 has a substantially rectangular bottom surface. In addition, the upper surface is a flat plate having a substantially constant thickness on the rotating shaft 74 side, but on the free end side, it has an inclined surface that is gently curved, and the thickness decreases toward the free end. Have. A contact portion 75 is formed at the rear end of the free end so as to protrude rearward from the rear end side surface of the guide unit 7 along the lower surface of the guide unit 7.

  Further, the upper surface of the guide unit 7 is a wall surface forming the document conveyance path 8, and a rib 72 and a conveyance roller 73 are arranged. The ribs 72 are line-like convex portions extending along the document transport direction, and are formed in large numbers so as to be orthogonal to the rotation shaft 74. The conveyance roller 73 is a conveyance unit that conveys a document, and is arranged in the center near the free end and in the front-rear direction near the rotation shaft. Furthermore, a thin plate 71 is formed at the free end of the upper surface of the guide unit 7. The thin plate 71 is a thin rectangular plate-like member, and guides the document that has passed through the document exposure port 6 in FIG. 2 to the conveyance path 8 on the guide unit 7.

  A pair of hook portions 76 are attached to both side surfaces of the guide unit 7 in the front-rear direction. The hook portion 76 is a fixing unit that fixes the guide unit 7 to the document cover 101, is fixed to a common rotation shaft 77, and rotates around the rotation shaft 77 in conjunction with each other. The rotation shaft 77 is disposed in the guide unit 7 so as to be parallel to the rotation shaft 74 of the guide unit 7. When these hook portions 76 are fitted to fixing pins (not shown) in the document cover 101, the guide unit 7 is fixed in a state of being accommodated in the document cover 101.

  Further, a lock lever 78 is fixed to the front hook portion 76 and rotates together with the hook portion 76. The lock lever 78 is an operation lever formed under the hook portion 76. When the user pulls the lock lever 78, the fixed state of the guide unit 7 and the document cover 101 is released, and the guide unit 7 can be freely opened and closed. . The lever stopper 79 is a restricting unit that restricts the rotation range of the lock lever 78, and prevents the lock lever 78 from entering deep inside the document cover 101. The hook portion 76 is urged to rotate in the protruding direction of the hook portion 76 by an urging means such as a spring (not shown). For this reason, the lever stopper 79 is in contact with the lock lever 78 when no external force is applied.

  6 and 7 are diagrams illustrating a detailed configuration example of the contact portion 75 of FIG. 6A is an enlarged view showing the inside of the broken line part B in FIG. 4B, and FIG. 6B is an enlarged view showing the inside of the broken line part C in FIG. 4C. FIG. 7A is a plan view of the contact portion 75 viewed from below, and FIG. 7B is a perspective view of the contact portion 75 viewed from the lower left rear.

  The shape of the contact portion 75 in plan view is a pentagonal shape in which one vertex of a rectangle is cut out with a straight line, and the cutout amount increases as it goes downward. That is, it is a three-dimensional shape obtained by cutting a rectangular parallelepiped along a plane inclined with respect to its height direction, and by cutting only one ridge line out of four ridge lines extending in the height direction, and cutting all the ridge lines It consists of the obtained three-dimensional shape. Here, the plane is referred to as a tapered surface 751.

  The upper surface 752 of the contact portion 75 is a flat surface substantially parallel to the bottom surface of the guide unit 7, and a recess for removing the meat is formed on the inner side, and the outer shape is cut out at the left rear vertex of the rectangular shape. It consists of a pentagon. The left end surface 753 and the rear end surface 754 of the abutting portion 75 are planes orthogonal to each other, both of which are formed in a trapezoidal shape in which ridge lines on the upper surface side and the lower surface side are formed in parallel to each other and the upper surface side is longer than the lower surface side. . Similarly, the tapered surface 751 is also a trapezoidal plane in which the ridge lines 751a and 751b on the upper surface side and the lower surface side are parallel to each other, but the ridge line 751a on the upper surface side is longer than the ridge line 751b on the lower surface side, It is inclined to protrude. That is, the taper surface 751 is an inclined surface that retreats to the right as it goes rearward and retreats to the right as it goes down.

  FIG. 8 is a perspective view showing a state in which the guide unit 7 is opened and the document cover 101 is closed. FIG. 8A is a diagram illustrating a state in which the document cover 101 is further closed from the state of FIG. The situation is shown. Moreover, (b) in the drawing is an enlarged view showing the inside of the broken line portion D of (a) in an enlarged manner.

  Since the upper surface of the top cover 2 is formed at a position higher than the upper surface of the platen glass 1, a step is formed on the periphery of the platen glass 1. In particular, the side surface of the top cover 2 exposed from the platen glass 1 at the left end and the rear end of the platen glass 1 is used as a reference surface 21 for positioning a document, and a ridge line 21 a is formed at the upper end of the reference surface 21. Is formed. When the guide unit 7 comes into contact with the reference surface 21, the stepped portion of the reference surface 21 can be easily overcome by bringing the tapered surface 751 of the contact portion 75 into contact with the ridge line 21 a. Here, a case where the abutting portion 75 of the guide unit 7 gets over the reference surface 21 at the left end of the platen glass 1 will be described.

  When the document cover 101 is closed from the state of FIG. 3A in which the guide unit 7 is in the open state, the contact portion 75 receives the reaction force from the platen glass 1 and the guide unit 7 is also closed. For this reason, the contact portion 75 moves leftward on the platen glass 1 in accordance with the angle at which the document cover 101 is closed. When the document cover 101 is closed to a predetermined angle, it reaches the reference surface 21 adjacent to the left end of the platen glass 1. The reference surface 21 is parallel to the rotation shaft 74 of the guide unit 7.

  When the guide unit 7 comes into contact with the reference surface 21, it is a contact portion 75 formed so as to protrude from the left rear end of the guide unit 7 first. In addition, since the tapered portion 751 is formed at the left rear end of the contact portion 75, the tapered surface 751 first comes into contact with the reference surface 21. At this time, the tapered surface 751 contacts from above so as to cover the ridge line 21 a of the reference surface 21. Therefore, when the document cover 101 is further closed, the tapered surface 751 slides on the ridge line 21a and rides on the ridge line 21a. For this reason, the contact part 75 can easily get over the reference surface 21.

  9 and 10 are diagrams showing in more detail how the tapered surface 751 contacts the ridge line 21a. FIG. 9 is an arrow view seen from the arrow E in FIG. 8A, that is, a perspective view seen from the lower right direction on the front side, and FIG. 9B is a view of F− in FIG. It is sectional drawing by F cut line. FIG. 10 is a perspective view seen from the rear.

  When the tapered surface 751 of the contact portion 75 first contacts the ridge line 21 a of the reference surface 21, the guide unit 7 is spatially inclined with respect to the platen glass 1. That is, the free end of the guide unit 7 is inclined in the vertical direction with the front end being higher than the rear end. In addition, the front end is located on the right side of the rear end and is inclined in the left-right direction.

  On the other hand, the tapered surface 751 is also spatially inclined with respect to the bottom surface of the guide unit 7. That is, the ridge line 751a on the upper surface side is inclined so as to be retracted toward the rotating shaft 74 toward the rear. Further, the ridge line 751b on the lower surface side is inclined so as to recede toward the rotating shaft 74 side than the ridge line 751a on the upper surface side.

  For this reason, when contacting the ridgeline 21a of the reference surface 21, the tapered surface 751 can be inclined so that it is parallel to the ridgeline 21a and the top cover 2 side is higher than the platen glass 1 side.

  As shown in FIG. 9B, the tapered surface 751 is inclined so as to recede toward the rotating shaft 74 as it goes from the ridge line 751a on the upper surface side to the ridge line 751b on the lower surface side. Therefore, the tapered surface 751 can be brought into contact with the ridge line 21a so that the tapered surface 751 is parallel to the ridge line 21a. Therefore, the taper surface 751 can be slid with respect to the ridgeline 21a, and the reference surface 21 can be easily climbed over the contact portion 75.

  Further, the free end of the guide unit 7, that is, the thin plate 71, retreats from the reference surface 21 while being lifted away from the contact portion 75. For this reason, the thin plate 71 inclines so that it may descend | fall toward the moving direction of the guide unit 7 shown by the arrow in FIG. On the other hand, the tapered surface 751 is inclined so as to rise in the moving direction by forming the ridge lines 751a and 751b with respect to the left end surface 753. For this reason, the taper surface 751 can be brought into contact with the ridgeline 21a of the reference surface 21 so as to cover the ridgeline 21a from above, and the ridgeline 21a can be easily moved so as to slide on the taper surface 751. For this reason, the guide unit 7 can easily get over the reference surface 21.

  By adopting such a configuration, when the guide unit 7 is opened and the document cover 101 is closed, the guide unit 7 comes into contact with the platen glass 1. If the document cover 101 is further closed from this state, the contact position on the platen glass 1 moves, eventually approaches the top cover 2, and the guide unit 7 contacts the ridge line 21 a formed at the upper end of the reference surface 21. At this time, since the contact surface of the guide unit 7 with respect to the ridge line 21a is a tapered surface 751 that rides on the ridge line 21a, the guide unit 7 can easily get over the reference surface 21. Therefore, the guide unit 7 can be closed by the operation of closing the document cover 101, and damage to the guide unit 7 can be suppressed. Moreover, since it is not necessary to hold | maintain the guide unit 7 in order to maintain the state with the guide unit 7 open, a user's operativity is not reduced.

  In particular, the platen glass 1 has a rectangular shape, and the taper surface 751 contacts the left reference surface 21 of the reference surfaces 21 formed at the left end and the rear end of the platen glass 1. The rotation axis 74 is parallel to the rotation axis 74. For this reason, the reference surface 21 that the tapered surface 751 should get over and the direction in which the tapered surface 751 moves on the document table 101 when the document cover 101 is closed can be made substantially orthogonal. For this reason, it is possible to easily get over the reference surface 21 over which the tapered surface 751 rides, compared to the case where the reference surface 21 is orthogonal to the rotation shaft 74.

  FIG. 11 is a schematic diagram showing an example of the internal configuration of the document cover 101, and shows a state where the guide unit 7 is open. The document cover 101 includes a document tray 111, a discharge tray 112, a plurality of transport rollers 73, a guide unit 7, a transport path 8, a document pressing plate 5, and a fixing pin 114.

  The document fed from the document tray 111 is transported on the transport path 8 and passes over the document exposure port 6 at the reading position P. At this time, the MFP body unit 102 reads the document through the document exposure port 6. After the reading is completed, the document is discharged to the discharge tray 112.

  The transport roller 73 is a document transport unit that transports a document on the transport path 8. The transport roller 73 includes a drive roller that is driven by a drive motor (not shown) and a driven roller that is disposed to face the drive roller across the transport path 8.

  The guide unit 7 is a member that guides a document conveyed on the conveyance path 8 and is configured to be openable and closable by rotating around a rotation shaft 74 formed on the lower right side. A hook portion 76 for fitting with the fixing pin 114 is formed on the side surface of the guide unit 7. Here, the guide unit 7 is opened, and the left end of the guide unit 7 projects to the MFP main body 102 side.

  The document pressing plate 5 is a rectangular plate for pressing a document placed on the platen glass 1 shown in FIG. A part of the left end side of the document pressing plate 5 can be opened and closed integrally with the guide unit 7.

  The fixing pin 114 is a fixing means for fixing the guide unit 7 to the document cover 101. More specifically, the guide unit 7 is fixed to the document cover 101 by fitting with the hook portion 76 of the guide unit 7.

  FIG. 12 is an explanatory diagram showing a state in which the document cover 101 is closed from the state of FIG. 11, and FIG. 12A shows an example of the internal configuration of the document cover 101 in the same manner as FIG. It is a schematic diagram, and (b) in the figure is an enlarged view showing the inside of the broken line part G of (a) in an enlarged manner.

  In the state where the guide unit 7 is opened, the guide unit 7 is rotated in the closing direction by being pressed by the document table 102a by the operation of closing the document cover 101. For this reason, as shown in FIG. 12A, when the document cover 101 is closed to a predetermined angle, the hook portion 76 approaches the fixing pin 114 from below, and the upper portion of the hook portion 76 is in contact with the fixing pin 114. Become. Here, when the document cover 101 is closed, a position where the hook portion 76 and the fixing pin 114 start to contact each other is referred to as a “pin contact position”.

  As shown in FIG. 12B, the front hook portion 76 includes a pin holding portion 76 c, a rotating shaft 77, and a lock lever 78. The hook portion 76 is a fixing means for fitting with the fixing pin 114, and a tapered surface 76s for contacting the fixing pin 114 is formed at an upper end thereof, and further adjacent to the lower side of the tapered surface 76s. A pin holding portion 76c is formed. The taper surface 76 s is an inclined surface formed so as to protrude toward the fixed pin 114 as it approaches the rotation shaft 77. The pin holding portion 76c is a recess for restricting the opening / closing operation of the guide unit 7 by holding the fixing pin 114, and opens in the clockwise direction.

  The lock lever 78 is an operation unit for the user to switch the fitting state between the fixing pin 114 and the hook portion 76, and is formed of a flat plate-like member that extends leftward from the lower side of the rotation shaft 77 of the hook portion 76. For example, in a state where the guide unit 7 is closed and the fixing pin 114 and the hook portion 76 are fitted, the fitting state is released when the user pushes the left end of the lock lever 78 downward, and the guide unit 7 is released. Open and close freely.

  FIG. 13 is a schematic diagram showing a state when the document cover 101 is further closed from the state of FIG. When the document cover 101 is further closed from the pin contact position, the guide unit 7 rotates in contact with the document table 102a, so that the hook portion 76 moves further upward with the fixed pin 114 in contact with the tapered surface 76s. To do. At this time, the hook portion 76 slides the fixing pin 114 along the tapered surface 76 s, so that the hook portion 76 rotates counterclockwise about the rotation shaft 77. Here, the opening / closing position of the document cover 101 when the hook portion 76 reaches the position most rotated counterclockwise is referred to as a “first opening / closing position”.

  FIG. 13 shows a state in which the document cover 101 is closed to the first opening / closing position. At this time, the hook portion 76 is maximally rotated counterclockwise about the rotation shaft 77, and the lock lever 78 protrudes toward the document table 102a. Further, the lock lever 78 is not in contact with the document table 102a.

  FIG. 14 is a perspective view showing a state when the document cover 101 is further closed from the state of FIG. 13, and shows a state when the document cover 101 and the document table 102a are viewed from the left front. In this figure, a lock lever 78 is shown between the document cover 101 and the document table 102a. When the document cover 101 is further closed from the first opening / closing position, the rear end of the lock lever 78 protruding toward the document table 102a comes into contact with the top cover 2 as shown in FIG. The open / close position of the document cover 101 at this time is referred to as a “lever contact position”.

  FIG. 15 is an explanatory view showing a state in which the guide unit 7 is fixed to the document cover 101. FIG. 15A is an example of the internal configuration of the document cover 101 in the same manner as FIG. (B) in the figure is an enlarged view showing the inside of the broken line portion H in (a) in an enlarged manner.

  When the guide unit 7 is closed and fixed to the document cover 101, the guide unit 7 is accommodated in the document cover 101 and the upper surface of the guide unit 7 forms the document transport path 8 as shown in FIG. . At this time, the hook unit 76 and the fixing pin 114 are fitted together, whereby the guide unit 7 is positioned with high accuracy, and document jamming due to the displacement of the guide unit 7 is suppressed.

  As shown in FIG. 15B, when the guide unit 7 is closed, the hook portion 76 and the fixing pin 114 are fitted. In this state, the fixing pin 114 is held in the pin holding portion 76c, whereby the opening / closing operation of the guide unit 7 is restricted.

  That is, when the document cover 101 is further closed from the first opening / closing position, the lock lever 78 is pressed against the document table 102a, so that the hook portion 76 rotates clockwise around the rotation shaft 77 from the state shown in FIG. As shown in FIG. 15B, the hook portion 76 and the fixing pin 114 are engaged. The opening / closing position of the document cover 101 at this time is referred to as a “second opening / closing position”.

  The guide unit 7 is provided with an urging means such as a spring (not shown) and urges the hook portion 76 to rotate clockwise. For this reason, when the document cover 101 is closed from the first rotation position to the second rotation position, as shown in FIG. 15B, the spring rotates the hook portion 76 clockwise and engages with the fixing pin 114. Let However, for example, the urging force of the spring is not sufficient, or the hook portion 76 and the fixing pin 114 may not be sufficiently fitted due to a slight gap between the document cover 101 and the document table 102a. is there. Even in this case, the hook portion 76 rotates in contact with the document table 102 a, whereby the hook portion 76 can be rotated clockwise and the hook portion 76 can be fitted to the fixing pin 114.

  The pair of hook portions 76 are both fixed to the rotation shaft 77 and interlocked with each other. That is, since the other hook part 76 is completely the same except that it does not have the lock lever 78, the overlapping description is omitted.

  In the present embodiment, by sliding the fixing pin 114 along the tapered surface 76s of the hook portion 76, the hook portion 76 is rotated counterclockwise as much as possible, and the lock lever 78 protrudes toward the document table 102a. Can be made. For this reason, the hook part 76 can be fitted to the fixing pin 114 with a simple configuration.

  When the first opening / closing position is closed, the tapered surface 76s of the hook portion 76 is in contact with the fixing pin 114, and when the hooking portion 76 is closed from the first opening / closing position to the second opening / closing position, the hook pin 76 is fixed. And can be fitted. Further, the fitting state between the fixing pin 114 and the hook portion 76 is not easily released, and the state of being accommodated in the document cover 101 can be maintained even if the document cover 101 is opened thereafter.

  In the conventional document reading apparatus, before the hook portion 76 rotates counterclockwise and reaches the first opening / closing position, the lock lever 78 contacts the document table 102a, and the hook portion 76 is rotated clockwise. there were. In this case, there is a problem that the hook portion 76 cannot reach the first opening / closing position, and the fixing pin 114 and the hook portion 76 cannot be sufficiently fitted.

  On the other hand, in the MFP 100 of the present embodiment, after the document cover 101 is closed to the first opening / closing position, the hook portion 76 is rotated integrally with the lock lever 78, and the hook portion 76 is fixed to the fixing pin 114. And can be fitted. That is, before the first opening / closing position is reached, the lock lever 78 can be prevented from coming into contact with the document table 102a and the hook portion 76 can be prevented from rotating, and can be fitted with the fixing pin 114 with high accuracy. Further, the hook portion 76 can be rotated and fitted to the fixing pin 114 by the operation of closing the document cover 101, so that the operability for the user can be improved.

  In the present embodiment, an example has been described in which the guide unit 7 that guides the document on the conveyance path is disposed as an opening / closing unit for exposing the inside of the document cover 101 toward the document table 102a. However, the present invention is not limited to this. For example, a configuration may be adopted in which a document storage cover for storing a document is disposed in the document cover 101 as the opening / closing unit.

  Further, in the present embodiment, an example has been described in which the reference surface 21 for positioning the document is formed and the contact portion 75 is brought into contact with the ridge line 21 a at the upper end of the reference surface 21. However, the present invention is not limited to this. For example, even in a configuration in which a tapered surface is formed at the upper end of the reference surface 21, it can be similarly applied.

  In the present embodiment, an example in which the rotation axis of the hinge portion 4 and the rotation axis of the guide unit 7 are substantially orthogonal to each other has been described. However, the present invention is not limited to this, and the hinge portion 4 is not limited thereto. The rotation axis of the guide unit 7 and the rotation axis of the guide unit 7 may be crossed.

  Further, in the present embodiment, the configuration in which the hook portion 76 is fitted to the fixing pin 114 by the biasing force of the spring and the reaction of the lock lever 76 in contact with the document table 102a has been described. However, the present invention is not limited to the configuration including both the spring and the lock lever 76. For example, a configuration in which the hook portion 76 is fitted to the fixing pin 114 by any one of an urging means such as a spring and the lock lever 76 may be employed.

DESCRIPTION OF SYMBOLS 1 Platen glass 2 Top cover 3 Contact glass 4 Hinge part 5 Original press plate 6 Original exposure port 7 Guide unit 8 Transport path 21 Reference surface 21a Ridge line 74 Lock lever 75 Contact part 74, 77 Rotating shaft 100 Multifunction machine 101 Original cover 102 MFP body 102a Document platen 114 Fixing pin 751 Tapered surface 76 Hook part 77 Rotating shaft 78 Lock lever 76c Pin holding part

Claims (6)

A flat bed reading device having a document table; a document cover that covers the document table; and a hinge portion that connects the document cover to the flat bed reading device so as to be openable and closable around a first rotation axis.
The document table includes a platen glass on which a document is placed, and a top cover that is disposed adjacent to the periphery of the platen glass and whose side surface exposed from the platen glass serves as a reference surface for positioning the document. ,
The document cover has an opening / closing unit for exposing the inside of the document cover toward the document table on the bottom surface facing the document table,
The opening / closing unit is capable of transitioning between an open state that exposes the inside of the document cover and a closed state that is accommodated in the document cover by rotating about a second rotation axis that intersects the first rotation axis. When the document cover is closed with the open / close unit in an open state, the first cover surface has a first tapered surface that first contacts the ridgeline formed at the upper end of the reference surface and rides on the ridgeline. Document reading device.   2. The first tapered surface is inclined such that the first tapered surface is parallel to the ridge line and in contact with the ridge line, and the top cover side is higher than the platen glass side. Document reading device. The platen glass is a rectangle,
The document reading apparatus according to claim 1, wherein the reference surface is parallel to the second rotation axis. The document cover has a fixing pin,
The opening / closing unit opens in the positive direction, and a hook portion for fitting with the fixing pin;
A third rotating shaft for rotating the hook portion;
A lever that rotates integrally with the hook portion;
The hook portion has a second tapered surface for contacting the fixing pin;
When the document cover is closed to the first opening / closing position in the open state of the opening / closing unit, the opening / closing unit rotates in contact with the document table, so that the hook portion moves along the second tapered surface. The fixing pin is slid and rotated to the maximum in the reverse direction around the third rotation axis, and the lever protrudes toward the document table without contacting the document table. Item 2. The document reading device according to Item 1. The opening / closing unit has an urging means for urging the hook portion to rotate in the forward direction,
When the document cover is closed from the first opening / closing position to the second opening / closing position in the open state of the opening / closing unit, the biasing means rotates the hook portion in the forward direction to engage the fixing pin. 5. The document reading apparatus according to claim 4, wherein   When the document cover is closed from the first opening / closing position to the second opening / closing position in the open state of the opening / closing unit, the lever rotates in contact with the document table, so that the hook portion rotates the third rotation shaft. The document reading device according to claim 4, wherein the document reading device rotates in the positive direction about the center and is fitted with the fixing pin.

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