JP2014069940A - Image recording device - Google Patents

Abstract

Jam processing is easily performed while maintaining conveyance accuracy of a recording medium.
When it is determined that a sheet has jammed based on a detection result of a sensor disposed on a conveyance path, conveyance of the sheet is stopped (S102). Further, if it is determined that the paper is jammed between the nip roller pair arranged on the upstream side in the transport direction of the detachable main body paper feed tray and the nip roller pair arranged on the downstream side (S112: YES) The pair of nip rollers is rotated forward until the sheet comes off the upstream nip roller pair (S114: YES). After the main body feed tray is removed (S117: YES), the pair of nip rollers on the downstream side is reversely rotated until the paper is discharged into the tray storage chamber in which the main body feed tray is disposed (S118: YES).
[Selection] Figure 4

Description

  The present invention relates to an image recording apparatus that records an image on a recording medium.

  An image recording apparatus is known in which a plurality of paper feed trays (additional supply units) can be mounted in an arrayed state at the bottom of the main body. In such a configuration, the paper supplied from the lower paper feed tray passes through the upper paper feed tray. When it is detected in the printer that the paper has jammed, all the papers that are being conveyed are stopped. At this time, if the sheet is stopped so as to straddle two adjacent sheet feeding trays, the sheet becomes an obstacle and it becomes difficult to remove the sheet feeding tray. On the other hand, first, there is a technique in which one of the rollers nipping the paper is detachable in order to remove the paper (see, for example, Patent Document 1).

JP 05-193784 A

  However, if the roller for nipping the sheet is configured to be detachable, the positional accuracy of the roller is deteriorated, and the sheet conveyance accuracy is lowered.

  An object of the present invention is to provide an image recording apparatus capable of easily performing jam processing while maintaining the conveyance accuracy of a recording medium.

  The image recording apparatus of the present invention can accommodate a plurality of recording media, and one or more additional supply units that supply the accommodated recording medium to the apparatus main body can be attached to and detached from the lower part of the apparatus main body. A recording medium tray capable of accommodating a casing, a recording head, and a plurality of recording media, and detachable from a tray accommodating chamber in the casing, wherein the recording medium supplied from the additional supply unit is conveyed A recording medium tray that defines a part of the transport path to be transported, and a transport that transports the recording medium accommodated in the recording medium tray or the recording medium supplied from the additional supply unit in the transport direction toward the recording head A first nip roller pair that is disposed upstream of a part of the transport path in the transport direction and sandwiches the recording medium supplied from the additional supply unit; A transport mechanism that includes a second nip roller pair that is disposed downstream of the transport path in the transport direction and sandwiches the recording medium supplied from the additional supply unit or the recording medium tray; and a recording medium in the transport mechanism A position detecting means for emitting a signal for detecting the position of the recording medium, a tray detecting means for emitting a signal for detecting whether or not the recording medium tray is mounted, and a controller for controlling the transport mechanism. And the control unit performs the first operation to stop the conveyance of the recording medium when it is determined that the recording medium has jammed based on the signal issued from the position detection unit. The mechanism is controlled, and after the first operation, the recording medium is sandwiched between the first and second nip roller pairs based on a signal emitted from the position detecting means. When it is determined that the recording medium is stopped, the second operation is performed in which the first and second nip roller pairs rotate forward until the recording medium is positioned downstream of the first nip roller pair in the transport direction. If the recording medium tray is removed from the tray storage chamber based on a signal generated from the tray detection means after the second operation, the recording medium is The transport mechanism is controlled to perform a third operation in which the second nip roller pair rotates in a reverse direction until it is discharged into the tray storage chamber.

  According to the present invention, when the recording medium is stopped (jammed) while being sandwiched between the first and second nip roller pairs, the transport mechanism performs the second operation and the second operation so that the recording medium is discharged into the tray storage chamber. Since the third operation is performed, it is not necessary to make the second nip roller pair detachable. As a result, the second nip roller pair can be fixed, and jamming can be easily performed while increasing the positional accuracy during conveyance of the recording medium.

It is a schematic side view which shows the internal structure of the inkjet printer by embodiment of this invention. (A) It is a front view of the tray storage chamber shown in FIG. (B) It is a side view when a main body feed tray is removed. (C) It is a side view when a main body paper supply tray is mounted | worn. FIG. 2 is a diagram illustrating an electrical configuration of the ink jet printer illustrated in FIG. 1. It is a flowchart explaining the recording operation of the inkjet printer shown in FIG. It is a schematic side view explaining the recording operation of the ink jet printer shown in FIG. It is a schematic side view explaining the recording operation of the ink jet printer shown in FIG. It is a schematic side view explaining the recording operation of the ink jet printer shown in FIG. It is a schematic side view explaining the recording operation of the ink jet printer shown in FIG. It is a schematic side view explaining the recording operation of the ink jet printer shown in FIG.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the printer 100 includes an apparatus main body 101 that forms an image on paper P, and three additional paper feeding units 80 that are configured to be detachable from the apparatus main body 101. These additional paper feed units 80 are connected in three stages in series along the vertical direction at the lower part of the apparatus main body 101, and are configured to be able to feed paper P to the apparatus main body 101.

  The apparatus main body 101 will be described with reference to FIG. The apparatus main body 101 has a rectangular parallelepiped casing 101a. A main body discharge unit 4 is provided on the top of the casing 101a. A main body control unit 150 that controls each part of the apparatus main body 101, a head 1, a transport mechanism 40, sensors 7, 8 and a main body paper feed tray 10 are arranged in the internal space of the housing 101a. Further, a sheet conveyance path through which the sheet P is conveyed from the main body paper feed tray 10 toward the main body paper discharge unit 4 is formed in the housing 101a. In the apparatus main body 101, the main body paper feed tray 10, the head 1, and the main body paper discharge unit 4 are arranged in order from the lower side in the vertical direction. Thereby, in the apparatus main body 101, the recording medium is conveyed from the lower side to the upper side. A direction from the main body paper feed tray 10 toward the main body paper discharge unit 4 in the paper transport path is referred to as a recording medium transport direction.

  A hole 104 and a paper feed connector 105 are provided on the bottom plate of the housing 101a. As shown in FIG. 3, each of the connection lines 206 and 207 is a signal line that connects the paper feed connector 105 and the main body control unit 150 to each other. A mounting sensor 78 is provided in the hole 104 (see FIG. 1). The mounting sensor 78 is connected to the main body control unit 150. The mounting sensor 78 is a transmissive sensor. When a projection 195 of a stabilizer 190 (see FIG. 1) described later enters the hole 104, the mounting sensor 78 detects the projection 195 and outputs a detection signal to the main body control unit 150. This makes it possible to detect whether the stabilizer 190 is attached to the lower part of the apparatus main body 101. When the main body control unit 150 determines that the stabilizer 190 is not attached, the main body control unit 150 does not execute the printing process to prevent the overturn.

  The main body control unit 150 and the paper feed control unit 170 of the additional paper feed unit 80 can communicate with each other by connecting a second paper feed connector 87 of the additional paper feed unit 80 described later to the paper feed connector 105. Connected. As shown in FIG. 1, a sheet feeding port 106 through which the sheet P fed from the additional sheet feeding unit 80 passes is formed on the bottom plate of the housing 101 a. Further, a nip roller pair (first nip roller pair: a part of the transport mechanism 40) 141 is disposed immediately above the paper supply port 106 to sandwich the paper P passing through the paper supply port 106 and send it further upward. Yes.

  As shown in FIG. 3, the connection line 206 is a signal line for receiving response data from the additional sheet feeding unit 80. A connection line 207 is a signal line for the apparatus main body 101 to transmit command data to the additional sheet feeding unit 80. The command data is data for causing the additional sheet feeding unit 80 to perform a specific processing operation. The specific processing operation is, for example, an operation based on predetermined feeding conditions and a conveyance speed, and is an operation for conveying the paper P in the additional paper feeding unit 80. The command data is data for the main body control unit 150 to determine whether or not the additional paper feeding unit 80 is mounted on the apparatus main body 101. The command data is data for the main body control unit 150 to determine how many additional paper feed units 80 are installed when the additional paper feed unit 80 is installed in the apparatus main body 101. When receiving the command data, the paper feed control unit 170 of the additional paper feed unit 70 transmits response data to the main body control unit 150. The main body control unit 150 determines whether or not the additional paper feeding unit 80 is attached to the apparatus main body 101 based on whether or not response data is received. Further, the main body control unit 150 determines how many additional sheet feeding units 80 are installed according to the number of received response data. For example, as shown in FIG. 1, when the extension sheet feeding unit 80 is mounted in three stages on the apparatus main body 101, the main body control unit 150 receives three response data. It is determined that the additional sheet feeding unit 80 is mounted in three stages.

  Returning to FIG. 1, the head 1 is a line head having a substantially rectangular parallelepiped shape elongated in the main scanning direction (described later). Black ink is ejected from the head 1. The head 1 is supported by the housing 101 a via the head holder 5. The head holder 5 holds the head 1 so that a predetermined gap suitable for recording is formed between the head 1 and the platen 6. A plurality of ejection openings for ejecting ink are opened on the lower surface (ejection surface 1 a) of the head 1.

  As shown in FIGS. 1 and 2, the main body sheet feeding tray 10 is accommodated in a tray accommodating chamber 101b formed in the housing 101a. The tray housing chamber 101b communicates with an opening 101c formed on the front surface (the surface on the left side in FIG. 1) of the housing 101a. The opening 101c is formed in a substantially rectangular shape. The tray accommodating chamber 101b is defined in a substantially rectangular parallelepiped shape by upper and lower and left and right walls in FIG. 2A extending in the sub-scanning direction from the opening 101c. The space in the tray housing chamber 101b is a passage area through which the main body paper feed tray 10 passes when it is attached and detached. To the tray accommodating chamber 101b. The main body feed tray 10 has a tray main body 10a that can store a plurality of sheets P in a stacked state, and a guide 13a that defines a part of a conveyance path through which the sheet P supplied from the additional sheet feeding unit 80 is conveyed. Including. The guide 13a is supplied in the vertical direction so that the paper P supplied from the additional paper supply unit 80 via the paper supply port 106 and further conveyed upward by the nip roller pair 141 is conveyed toward the platen 6. It is extended. A sensor 10b for detecting the attachment / detachment of the main body paper feed tray 10 is disposed in the vicinity of the tray housing chamber 101b of the housing 101a.

  As shown in FIG. 2, two movable guides 61 are arranged in the housing 101a. The two movable guides 61 are arranged at the upper part of the tray accommodating chamber 101b and the lower part of the tray accommodating chamber 101b, respectively. The two movable guides 61 are disposed downstream of the nip roller pair 141 in the transport direction and upstream of the nip roller pair 142 in the transport direction. The movable guides 61 arranged at the upper part of the tray accommodating chamber 101b each include a rotating shaft body 61a, a guide member 61b, a protruding portion 61c, a spring 61d, and a stopper 61e. Each rotation shaft body 61 a extends in the left-right direction in FIG. 2A and is a member that defines the rotation axis of each movable guide 61. That is, each movable guide 61 rotates about each rotation shaft body 61a. One end of the rotating shaft 61a is disposed at a position overlapping the transport path of the paper P in the left-right direction in FIG. 2A, and the other end is disposed at a position not overlapping the transport path in the left-right direction in FIG. Yes. The guide member 61b is a rod-like member that extends from one end of the rotation shaft body 61a in a direction orthogonal to the rotation shaft body 61a. The guide member 61b is located at the center of the tray storage chamber 101b in the left-right direction. The protrusion 61c is a rod-like member that extends from the other end of the rotating shaft 61a in a direction orthogonal to the rotating shaft 61a.

  The movable guide 61 disposed in the upper part of the tray accommodating chamber 101b rotates around the rotation shaft body 61a, whereby the retracted position shown in FIG. 2C and the position shown in FIG. The guide position can be taken. The retracted position is a position where the guide member 61b is retracted from the tray accommodating chamber 101b and does not interfere with the conveyed paper P. The guide position protrudes into the tray housing chamber 101b and the paper P conveyed from the pair of nip rollers 142, that is, the paper P that has entered the tray housing chamber 101b from above, and the tray housing chamber 101b formed in the housing 101a. It is a position to guide toward the opening that communicates. When the movable guide 61 is in the retracted position, the guide member 61b extends substantially horizontally from the rotating shaft body 61a toward the right side (the side far from the opening 101c) in FIG. When the movable guide 61 is in the retracted position, the guide member 61b is disposed at a position that does not overlap the conveyance path between the nip roller pair 141 and the nip roller pair 142. For this reason, when the movable guide 61 is in the retracted position, the guide member 61b does not interfere with the conveyed paper P. On the other hand, when the movable guide 61 is in the guide position, the guide member 61b extends obliquely downward from the rotating shaft 61a toward the left side (the side close to the opening 101c) in FIG. . When the movable guide 61 is in the guide position, the guide member 61b is disposed at a position overlapping the conveyance path between the nip roller pair 141 and the nip roller pair 142. Therefore, when the movable guide 61 is at the guide position, the guide member 61 b comes into contact with the paper P conveyed from the nip roller pair 142. At this time, since the guide member 61b extends obliquely downward toward the opening 101c, the paper P that contacts the guide member 61b is guided toward the opening.

  The movable guide 61 disposed in the lower portion of the tray accommodating chamber 101b rotates around the rotation shaft 61a, thereby causing the retracted position shown in FIG. 2C and the position shown in FIG. The guide position can be taken. The retracted position is a position where the guide member 61b is retracted from the tray accommodating chamber 101b and does not interfere with the conveyed paper P. The guide position communicates with the tray accommodating chamber 101b formed in the housing 101a by the sheet P protruding from the tray accommodating chamber 101b and conveyed from the nip roller pair 141, that is, the sheet P entering the tray accommodating chamber 101b from below. It is a position to guide toward the opening to be performed. When the movable guide 61 is in the retracted position, the guide member 61b extends substantially horizontally from the rotating shaft body 61a toward the right side (the side far from the opening 101c) in FIG. When the movable guide 61 is in the retracted position, the guide member 61b is disposed at a position that does not overlap the conveyance path between the nip roller pair 141 and the nip roller pair 142. For this reason, when the movable guide 61 is in the retracted position, the guide member 61b does not interfere with the conveyed paper P. On the other hand, when the movable guide 61 is in the guide position, the guide member 61b extends obliquely upward from the rotating shaft body 61a toward the left side (the side close to the opening 101c) in FIG. . When the movable guide 61 is in the guide position, the guide member 61b is disposed at a position overlapping the conveyance path between the nip roller pair 141 and the nip roller pair 142. Therefore, when the movable guide 61 is at the guide position, the guide member 61 b comes into contact with the paper P conveyed from the nip roller pair 142. At this time, since the guide member 61b extends obliquely upward toward the opening 101c, the paper P in contact with the guide member 61b is guided toward the opening.

  Each spring 61d biases each protrusion 61c so that the guide member 61b moves from the retracted position to the guide position. Each spring 61d is a torsion coil spring, with one end attached to the protruding portion 61c and the other end attached to the housing 101a with the rotating shaft 61a as a guide rod. The stopper 61e is disposed at a position where it interferes with the protruding portion 61c when the guide member 61b takes the guide position. For this reason, when the main body paper feed tray 10 is not mounted, each movable guide 61 is positioned at the guide position by the urging force of the spring 61e.

  On the other hand, as shown in FIG. 2C, when the main body paper feed tray 10 is mounted in the tray accommodating chamber 101b from the front opening, the guide member of each movable guide 61 in which the main body paper feed tray 10 is in the guide position. It contacts 61b. The main body sheet feeding tray 10 presses each guide member 61b against the urging force of the spring 61e, whereby each movable guide 61 is positioned at the retracted position.

  The transport mechanism 40 includes two guide portions 9 a and 9 b that guide the paper P, the platen 6, and the paper feed roller 12. The platen 6 is a flat plate member and is disposed at a position facing the ejection surface 1 a of the head 1. The paper feed roller 12 sends out the uppermost paper P in the main body paper feed tray 10.

  The two guide portions 9a and 9b are arranged with the platen 6 interposed therebetween in the transport direction. The guide portion 9a on the upstream side in the transport direction includes two guides 13b and 13c and three nip roller pairs 141, 142, and 15. The nip roller pair 141 is disposed immediately above the sheet supply port 106 and upstream of the guide 13a in the transport direction. The nip roller pair 142 is disposed on the downstream side in the transport direction of the guide 13a. The guide 13 b constitutes a conveyance path extending in the vertical direction between the nip roller pair 142 and the guide 13 a and a conveyance path between the nip roller pair 142 and the paper feed roller 12. The guide 13c extends from the nip roller pair 142 to the nip roller pair 15 in the vicinity of the platen 6, and constitutes a conveyance path between them. With this configuration, the guide unit 9 a conveys the paper P from the main body paper feed tray 10 and the paper P from the additional paper feed unit 80 toward the platen 6. A sensor 14 a that detects the sheet is disposed on the downstream side in the transport direction of the nip roller pair 141 and on the upstream side of the nip roller pair 142. In addition, a sensor 14 b that detects the sheet is disposed downstream of the nip roller pair 16 in the transport direction and upstream of the nip roller pair 17.

  The guide portion 9b on the downstream side in the transport direction has two guides 19a and 19b and three nip roller pairs 16-18. The three nip roller pairs 16 to 18 are arranged at appropriate intervals along the conveyance direction of the paper P. The guide 19a extends from the nip roller pair 16 to the nip roller pair 17, and constitutes a conveyance path between them. The guide 19b extends from the nip roller pair 17 to the nip roller pair 18, and constitutes a conveyance path between them.

  Note that the sub-scanning direction in the figure is a direction parallel and horizontal to the transport direction in which the paper P is transported by the nip rollers 15 and 16, and the main scanning direction is a direction parallel to the horizontal plane and perpendicular to the sub-scanning direction. It is.

  As shown in FIG. 2, the paper discharge unit 4 is constituted by a concave portion formed on the top plate of the housing 101a. A support plate 4 a that supports the discharged paper P is provided at the bottom of the recess 4. The support plate 4a is connected to the top plate of the housing 101a via a shaft 4b, and is configured to be rotatable between an upper limit position and a lower limit position. The upper limit position is a position where the upstream end (tip) in the transport direction of the support plate 4a is located at the uppermost position. At this time, the tip of the support plate 4a and the recess formed on the side surface of the recess 4 are engaged, and the upward movement of the tip of the support plate 4a is restricted. The lower limit position is a position where the tip of the support plate 4a is located at the lowest position. In the lower limit position, a spring 4c described later is in a most compressed state. A spring 4c is disposed between the support plate 4a and the bottom surface of the recess 4 to urge the support plate 4a upward. That is, as the number of sheets P supported by the support plate 4a increases, that is, as the weight on the support plate 4a increases, the spring 4c contracts and the support plate 4a moves to the lower limit position.

  The sensor 8 is a proximity sensor and is fixed to the bottom of the recess 4. The sensor 8 detects the tip of the support plate 4a when the support plate 4a is at the lower limit position, and outputs a detection signal to the main body control unit 150. Accordingly, the main body control unit 150 can determine whether or not the paper P discharged to the paper discharge unit 4 has reached a predetermined amount based on the detection signal.

  The sensor 7 is a displacement sensor and is fixed to the upper part of the main body paper feed tray 10. The sensor 7 detects the height of the paper P stored in the main body paper feed tray 10, and outputs a detection signal to the main body control unit 150. Accordingly, the main body control unit 150 can determine the number of sheets P in the main body paper feed tray 10 based on the detection signal. That is, the main body control unit 150 can determine the presence / absence and quantity of the paper P in the main body paper feed tray 10 based on the detection signal of the sensor 7.

  The apparatus main body 101 is detachably provided with an ink cartridge (not shown) that stores black ink supplied to the head 1. This ink cartridge is connected to the head 1 via a tube (not shown) and supplies ink to the head 1.

  Next, the extension sheet feeding unit 80 will be described. Since the three additional paper feed units 80 in the present embodiment have the same configuration, only one additional paper feed unit 80 will be described.

  The extension paper feeding unit 80 has a housing 81 as shown in FIG. In the casing 81, a paper feed tray 82, a guide unit 84, a sensor 85, a paper feed control unit 170, and the like are arranged. The paper feed tray 82 is detachable from the housing 81. A plurality of sheets P can be stored in the sheet feed tray 82. The paper feed control unit 170 controls the operations of the paper feed roller 83 and the nip roller pair 89 of the guide unit 84 based on a command (command data) from the main body control unit 150.

  The sensor 85 is a displacement sensor and is fixed to the upper part of the paper feed tray 82. The height of the paper P stored in the paper feed tray 82 is detected, and a detection signal is output to the main body control unit 150 via the paper feed control unit 170. Accordingly, the main body control unit 150 can determine the number of sheets P in the sheet feed tray 82 based on the detection signal.

  A first paper feed connector 86 is provided on the bottom plate of the housing 81. The first paper feed connector 86 is disposed at a position that coincides with the paper feed connector 105 in the horizontal direction. A second paper feed connector 87 is provided on the top plate of the housing 81. The second paper feed connector 86 is disposed at a position that coincides with the first paper feed connector 86 in the horizontal direction. The second paper feed connector 87 can be connected to both the paper feed connector 105 and the first paper feed connector 86 of another extension paper feed unit 80. As shown in FIG. 3, the first paper feed connector 86 is connected to the paper feed controller 170 via connection lines 266 to 268, and the second paper feed connector 87 is fed via connection lines 265 to 267. It is connected to the paper control unit 170. Each of the connection lines 266 and 267 is a signal line that mutually connects the first paper feed connector 86, the second paper feed connector 87, and the paper feed control unit 170. On the other hand, the connection line 265 is a signal line that connects only the second paper feed connector 87 and the paper feed control unit 170, and the connection line 268 connects the first paper feed connector 86 and the paper feed control unit 170. It is a signal line that connects only between the two.

  When the second paper feed connector 87 is connected to the paper feed connector 105 of the apparatus main body 101, the connection lines 265 and 267 are connected to the connection line 206 of the apparatus main body 101. The connection line 266 is connected to the connection line 207 of the apparatus main body 101. On the other hand, when the second paper feed connector 87 is connected to the first paper feed connector 86 of another extension paper feed unit 80, the connection lines 266 and 267 are connection lines 266 and 267 of the other extension paper feed unit 80. Are connected to each other, and the connection line 265 is connected to the connection line 268 of the other additional sheet feeding unit 80.

  With the above configuration, even in the additional paper feed unit 80 connected to the apparatus main body 101 in the second and subsequent stages, the connection lines 266 and 267 of the additional paper feed unit 80 in the previous stage to the additional paper feed unit 80. And various types of data such as response data can be transmitted to and received from the apparatus main body 101.

  Returning to FIG. 1, a sheet discharge port 81 a through which the sheet P fed to the apparatus main body 101 or another additional sheet feeding unit 80 passes is formed on the top plate of the casing 81. A sensor 89a that detects the sheet is disposed at a position downstream of the nip roller pair 89 in the transport direction and adjacent to the sheet discharge port 81a. Formed on the bottom plate of the housing 81 is a paper feed port 81b through which the paper P fed from the additional paper feed unit 80 positioned below passes.

  A hole 81 c is formed in the bottom plate of the housing 81. The hole 81c is arranged at a position that coincides with the hole 104 in the horizontal direction. A mounting sensor 79 (see FIG. 3) is provided in the hole 81c. The mounting sensor 79 is connected to the paper feed control unit 170. When a projection 195 of a stabilizer 190 described later enters the hole 81c, the mounting sensor 79 detects the projection 195 and outputs a detection signal via the paper feed control unit 170. Output to the main body control unit 150. This makes it possible to detect whether the stabilizer 190 is attached to the lower part of the apparatus main body 101.

  The guide portion 84 includes two guides 88 a and 88 b, a paper feed roller 83, and a nip roller pair 89. The paper feed roller 83 sends out the uppermost paper P in the paper feed tray 82. The nip roller pair 89 is disposed in the vicinity of the paper discharge port 81a so that the paper P can be conveyed toward the paper discharge port 81a. The guide 88a extends from the paper feed port 81b to the nip roller pair 89 and constitutes a transport path between them. The guide 88b extends from the paper feed tray 82 to an intermediate portion of the guide 88a, and constitutes a conveyance path between them. With this configuration, the guide unit 84 transports the paper P from the paper feed tray 82 and the paper P from the other additional paper feed unit 80 toward the apparatus main body 101. In other words, the guide unit 84 conveys the paper P from below to above.

  The stabilizer 190 is configured to be attachable at the lower part of the apparatus main body 101 and the additional paper feeding unit 80 attached to the apparatus main body 101. The stabilizer 190 has a substantially rectangular parallelepiped casing 191 that extends outward from the apparatus main body 101 and the additional sheet feeding unit 80 in the horizontal direction. The top plate of the stabilizer 190 is provided with a recess 192 as shown in FIG. The recess 192 is formed to be slightly larger than the apparatus main body 101 and the additional sheet feeding unit 80 in the horizontal direction. The apparatus main body 101 or the additional paper supply unit 80 is inserted into the recess 192, and the stabilizer 190 and the apparatus main body 101 or the additional paper supply unit 80 are fixed by a lock mechanism (not shown). By attaching such a stabilizer 190 to the apparatus main body 101 or the additional paper feeding unit 80, the printer 100 is stabilized and hardly falls down. A protrusion 195 is formed on the top plate of the recess 192. The protrusion 195 is disposed at a position corresponding to the hole 81 c and the hole 104 of the apparatus main body 101 in the horizontal direction, and has a shape that can be inserted into the hole 81 c and the hole 104.

  Next, a jam processing operation of the printer 100 will be described with reference to FIG.

  When the printing operation is started, the main body control unit 150 causes all the sheets P in the middle of conveyance to reach a predetermined position within a predetermined period based on the detection signals of the sensors 14a, 14b, and 89a arranged in the conveyance path. It is determined whether or not a jam has occurred depending on whether or not it is being conveyed (S101). The predetermined period is a time required for the paper P to be transported between the sensors 14a, 14b, and 89a, and is determined in advance by the length of the transport path between the sensors. The planned position is a position where each sensor 14a, 14b, 89a is arranged. When determining that the paper P is jammed in the transport path (S101: YES), the main body control unit 150 stops the transport of the paper P (first operation) (S102). The position information of the paper P whose conveyance has been stopped is acquired from the history of detection results of the sensors 14 and 89a (S103). That is, the main body control unit 150 grasps the position in the transport path where the paper P whose transport has been stopped exists. Then, the main body control unit 150 determines whether the paper P is jammed on the downstream side of the main body paper feed tray 10 of the apparatus main body 101 (S104). The case where the paper P is jammed on the downstream side of the main body feed tray 10 means that the paper P does not reach the sensor 14b even after a predetermined period of time has passed after the paper P passes the sensor 14a. Can be mentioned. When the main body control unit 150 determines that the paper P is jammed on the downstream side of the main body paper feed tray 10 of the apparatus main body 101 (S104: YES), the main body control unit 150 performs jam processing of the apparatus main body 101 (S105). Here, the jam processing is to notify the user that a jam has occurred. The user removes the jammed paper P downstream from the main body paper feed tray 10. Then, after the jam processing, the user presses a button (not shown) of the housing 101a. When the button is pressed by the user, a jam processing completion signal is transmitted to the main body control unit 150. Note that the jam processing completion signal may not be transmitted by a button operation by the user, but may be transmitted based on, for example, opening / closing of a jam processing door. If it is determined that the paper P is jammed on the downstream side of the main body feed tray 10 of the apparatus main body 101 (S104: YES), for example, the situation is as shown in FIG. If the jammed paper P is further conveyed between the sensor 14a and the sensor 14b, the paper P may come into contact with the ejection surface of the head 1 and the ejection surface may be damaged. Therefore, in this embodiment, the paper P jammed between the sensor 14a and the sensor 14b is removed by the user.

  When the main body control unit 150 determines that the paper P is not jammed on the downstream side of the main body paper feed tray 10 of the apparatus main body 101 (S104: NO), or the jam processing in the apparatus main body 101 is completed (jamming). After receiving the processing completion signal (S105), it is determined whether or not the sheet P is present in the transport path defined by the guide 13a in the main body paper feed tray 10 (S106).

  When the main body control unit 150 determines that the paper P does not exist on the transport path defined by the guide 13a in the main body paper feed tray 10 (S106: NO), the main body control unit 150 uses the guides 88a of all the additional paper feed units 80. It is determined whether or not the sheet P is present in the specified transport path (S107). If the main body control unit 150 determines that the sheet P does not exist in the transport path defined by the guide 88a of the additional sheet feeding unit 80 (S107: NO), the flowchart of FIG.

  If the main body control unit 150 determines that the paper P is present in the transport path defined by the guide 88a of the additional paper feeding unit 80 (S107: YES), the main body control unit 150 displays a message prompting the user to remove the main body paper feeding tray 10. 75 (see FIG. 3) (notification unit) (S108). Thereafter, the output of the sensor 10b is monitored until the removal of the main body paper feed tray 10 is completed (S109: NO). When the output of the sensor 10b changes due to the user removing the main body paper feed tray 10, the main body control unit 150 determines that the main body paper feed tray 10 has been removed. Here, when the main body paper feed tray 10 is removed, each movable guide 61 moves from the retracted position to the guide position as the main body paper feed tray 10 moves. When the removal of the main body paper feed tray 10 is completed (S109: YES), the main body control unit 150 rotates the nip roller pair 89 and the nip roller pair 141 of all the additional paper feed units 80 in the normal direction (S110). In S110, the conveyance speed of the nip roller pair 89 and the nip roller pair 141 is lower than the conveyance speed during normal printing (hereinafter, low speed). Based on the output results of the sensors 81a, the main body control unit 150 continues normal rotation until the upstream end of the sheet P conveyed in S110 is disengaged from the nip roller pair 141 of the apparatus main body 101 (S111: NO). As a result, all the sheets P whose conveyance is stopped by S102 existing in the additional sheet feeding unit 80 are discharged to the outside from the opening 101c of the tray accommodating chamber 101b. At this time, the paper P conveyed in S110 is guided by the guide member 101b of the movable guide 61 disposed at the lower part of the tray housing chamber 101b and guided toward the opening 101c. Above, the flowchart of FIG. 4 is complete | finished.

  When the main body control unit 150 determines that the paper P exists on the conveyance path defined by the guide 13a in the main body paper feed tray 10 (S106: YES), the paper P exists between the nip roller pair 141, 142. It is determined whether or not (S112). Here, the case where the paper P exists between the nip roller pair 141 and 142 indicates a state where the paper P is sandwiched between both the nip roller pair 141 and 142 as shown in FIG. When the main body control unit 150 determines that the sheet P is present between the nip roller pair 141 and 142 (S112: YES), the main body control unit 150 rotates the nip roller pair 141 and 142 forward so that the sheet P is conveyed at a low speed. (S113). The main body control unit 150 determines whether or not the upstream side end (rear end) of the conveyed paper P is disengaged from the nip roller pair 141 of the apparatus main body 101 based on the output result of each sensor 81a (S114). The unit 150 continues the forward rotation of the pair of nip rollers 141 and 142 until the upstream end (rear end) of the conveyed paper P is positioned upstream of the nip roller pair 141 of the apparatus main body 101 in the transport direction (S114). : NO), then move to next step. The main body control unit 150 determines whether or not the upstream side end (rear end) of the conveyed paper P has reached the downstream side of the tray storage chamber 101b (passage region) (S115). As shown in FIG. 6, the main body control unit 150 sets the nip roller pairs 141 and 142 until the upstream end (rear end) of the conveyed paper P is positioned downstream of the tray storage chamber 101 b (passage region). The forward rotation is continued (S115: NO). Thereafter, the forward rotation of the nip roller pair 141, 142 is stopped (S115: YES). S112 to 115 of the present embodiment are an example of the second operation of the present invention. Thereafter, the main body control unit 150 displays on the display 75 (see FIG. 3) the content that prompts the user to remove the main body paper feed tray 10 (S116). Thereafter, the main body control unit 150 monitors the output of the sensor 10b until the removal of the main body paper feed tray 10 is completed (S117: NO). Here, when the main body sheet feeding tray 10 is removed, as shown in FIGS. 7 and 2, each movable guide 61 moves from the retracted position to the guide position. When the main body feed tray 10 is removed, the upstream end portion of the conveyed paper P is detached from the nip roller pair 141 of the apparatus main body 101, so that the main body feed tray 10 can be easily removed. If the main sheet feeding tray 10 is removed and the sheet P is sandwiched between both the nip roller pairs 141 and 142, when the main sheet feeding tray 10 is removed, the sheet P may be damaged or the main sheet feeding may be performed. Since the load for removing the tray 10 is large, the operability is deteriorated. Furthermore, since the upstream end (rear end) of the paper P is located downstream of the tray storage chamber 101b (passing region), the paper P is damaged when the main body paper supply tray 10 is removed. Is suppressed.

  When the removal of the main body paper feed tray 10 is completed (S117: YES), the main body control unit 150 rotates the nip roller pair 142 in the reverse direction (S118). As a result, as shown in FIG. 8, the paper P sandwiched between the pair of nip rollers 142 is transported in the direction opposite to the transport direction. The conveyance speed of the nip roller pair 142 in S118 is lower than the conveyance speed during normal printing (hereinafter referred to as low speed). The main body control unit 150 continues the reverse rotation until the upstream end portion of the conveyed paper P is separated from the nip roller pair 142 based on the output result of each sensor 81a (S119: NO). S118 and S119 of the present embodiment are an example of the third operation of the present invention. When the upstream end of the conveyed paper P is separated from the nip roller pair 142 (S119: YES), the paper P is discharged to the outside from the opening of the tray accommodating chamber 101b. At this time, the sheet P conveyed in S118 is guided toward the opening 101c by being guided by the guide member 101b of the movable guide 61 disposed in the upper part of the tray accommodating chamber 101b.

  Thereafter, the main body control unit 150 determines whether or not the sheet P is present in the transport path defined by the guide 88a of the additional sheet feeding unit 80 (S120). If the main body control unit 150 determines that the sheet P does not exist in the transport path defined by the guide 88a of the additional sheet feeding unit 80 (S120: NO), the flowchart of FIG.

  If the main body control unit 150 determines that the sheet P exists on the conveyance path defined by the guide 88a of the expansion sheet feeding unit 80 (S120: YES), the expansion is performed so that the sheet P is conveyed at a low speed. The nip roller pair 89 and the nip roller pair 141 of the paper supply unit 80 are rotated forward (S110). As a result, as shown in FIG. 9, the paper P existing in the transport path defined by the guide 88 a of the additional paper feed unit 80 is transported in the transport direction. The main body control unit 150 continues normal rotation until the upstream end portion of the conveyed paper P is separated from the nip roller pair 141 of the apparatus main body 101 based on the output result of each sensor 81a (S111: NO). S110 and S111 in the present embodiment are an example of the fourth operation of the present invention. As a result, all the sheets P remaining in the transport path defined by the guide 88a of the additional sheet feeding unit 80 are discharged to the outside from the opening of the tray accommodating chamber 101b. Above, the flowchart of FIG. 4 is complete | finished.

  As described above, according to the printer 100 of the present embodiment, when the paper P is stopped (jammed) while being sandwiched between the nip roller pairs 141 and 142, the paper P is rotated forward so as to be removed from the nip roller pair 141. , The main sheet feeding tray 10 is removed, and the paper P is transported in a reverse rotation so as to be detached from the nip roller pair 142, whereby the paper P is discharged into the tray accommodating chamber 101b. Need not be configured to be detachable. As a result, the nip roller pair 142 can be fixed, and jamming can be easily performed while increasing the positional accuracy during conveyance of the paper P.

  Since the transport speed when discharging the paper P sandwiched between the pair of nip rollers 141 and 142 is lower than the transport speed for normal printing, it is possible to prevent the paper P from being damaged.

  In the second operation, the main body control unit 150 detects that the upstream end of the conveyed paper P is disengaged from the nip roller pair 141 of the apparatus main body 101 and further in the transport direction than the nip roller pair 142 based on the output result of each sensor 81a. Since the normal rotation of the pair of nip rollers 141 and 142 is continued until the upstream side and the downstream side of the tray accommodating chamber 101b are located, the main body sheet feeding tray 10 can be removed more smoothly. At this time, it is possible to prevent the paper P from being damaged.

  The paper P can be smoothly guided toward the opening of the tray storage chamber 101b by the movable guides 61 disposed at the upper and lower portions of the tray storage chamber 101b.

  When a jam occurs, all the paper P remaining in the additional paper feed unit 80 is discharged to the tray storage chamber 101b after the main body paper feed tray 10 is removed, so that the jam processing can be performed more reliably and easily. Can be done.

  When the main body control unit 150 is jammed when any of all the sheets P in the middle of conveyance is not conveyed to the planned position based on the detection signals of the sensors 14 and 89a arranged in the conveyance path. Therefore, it can be easily and reliably determined whether or not the paper P is jammed.

  Since the display 75 informs the user that the main body paper feed tray 10 is to be removed, it can be expected that the user reliably removes the main body paper feed tray 10.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims. For example, in the embodiment, the transport speed when discharging the paper P sandwiched between the pair of nip rollers 141 and 142 is set to a lower speed than the transport speed for normal printing. The paper P may be transported at a speed higher than the printing transport speed.

  In the above-described embodiment, in the second operation, the main body control unit 150 causes the upstream end of the conveyed paper P to be disengaged from the nip roller pair 141 of the apparatus main body 101, and further in the transport direction from the nip roller pair 142. The nip roller pair 141, 142 continues to rotate forward until it is positioned upstream of the tray storage chamber 101b. However, if the upstream end of the paper P is out of the nip roller pair 141, it is optional. The forward rotation may be continued up to the position.

  Furthermore, in the above-described embodiment, the movable guide 61 is arranged at the upper part and the lower part of the tray accommodating chamber 101b. However, the movable guide 61 may be arranged only at either the upper part or the lower part. May be. Further, the movable guide may have any configuration as long as the sheet P discharged into the tray accommodating chamber 101b can be guided toward the opening.

  In addition, in the above-described embodiment, when a jam occurs, all the paper P remaining in the conveyance path of the additional paper feed unit 80 after the main body paper feed tray 10 is removed is all stored in the tray storage chamber 101b. Although it is the structure discharged | emitted, the structure which does not perform such discharge | emission operation | movement may be sufficient.

  Further, in the above-described embodiment, after the paper P jammed between the nip roller pair 141 and 142 is discharged by the second operation and the third operation, the paper P remaining in the conveyance path of the additional paper supply unit 80 is removed. Although it is the structure which discharges | emits by 4th operation | movement, the structure which performs 3rd operation | movement and 4th operation | movement simultaneously may be sufficient.

  Further, in the above-described embodiment, the main body control unit 150 transports any of the sheets P in the middle of transport to the planned position based on the detection signals of the sensors 14 and 89a arranged in the transport path. However, other configurations may be used as long as the position of the paper P can be specified. For example, the structure which arrange | positions a sensor to the whole conveyance path | route may be sufficient.

  In addition, in the above-described embodiment, the display 75 is configured to notify the user that the main body paper feed tray 10 is to be removed, but may be notified by a notification means other than the display 75 such as a buzzer. The structure which does not have a means may be sufficient.

  The present invention can be applied to both a line type and a serial type, and is not limited to a printer, and can also be applied to a facsimile machine, a copier, and the like. Further, recording is performed by discharging a liquid other than ink. The present invention can also be applied to a recording apparatus that performs. The present invention is not limited to the ink jet type, and can be applied to, for example, a thermal type recording apparatus. The recording medium is not limited to the paper P, and may be various recording media.

DESCRIPTION OF SYMBOLS 1 Head 7, 8, 10b, 14, 85, 93 Sensor 10 Main body paper supply tray 61 Movable guide 61a Rotating shaft body 61b Guide member 61c Projection part 61d Spring 61e Stopper 75 Display 80 Additional paper supply unit 100 Inkjet printer 101 Device main body 101a Case 101b Tray storage chamber 101c Opening 141, 142 Nip roller pair 150 Main body control unit

Claims (9)

A plurality of recording media can be accommodated, and one or more additional supply units that supply the accommodated recording media to the apparatus main body can be attached to and detached from the lower part of the apparatus main body.
A housing,
A recording head;
A recording medium tray that can store a plurality of recording media and is detachable from a tray storage chamber in the housing, and defines a part of a conveyance path through which the recording medium supplied from the additional supply unit is conveyed A recording medium tray to be
A transport mechanism for transporting a recording medium stored in the recording medium tray or a recording medium supplied from the additional supply unit in a transport direction toward the recording head, the transport mechanism being more than a part of the transport path. A first nip roller pair disposed on the upstream side in the direction to sandwich the recording medium supplied from the additional supply unit, and the additional supply unit disposed on the downstream side in the transport direction with respect to a part of the transport path. A transport mechanism including a second nip roller pair for sandwiching the recording medium supplied from the recording medium tray;
Position detecting means for emitting a signal for detecting the position of the recording medium in the transport mechanism;
Tray detection means for emitting a signal for detecting whether or not the recording medium tray is mounted;
A control unit for controlling the transport mechanism,
The control unit controls the transport mechanism to perform a first operation for stopping the transport of the recording medium when it is determined that a jam of the recording medium has occurred based on a signal issued from the position detection unit. When it is determined after the first operation that the recording medium is stopped in a state of being sandwiched between the first and second nip roller pairs based on a signal generated from the position detecting unit, the recording is performed. Controlling the transport mechanism to perform a second operation in which the first and second nip roller pairs rotate forward until the medium is positioned downstream of the first nip roller pair in the transport direction, and the second operation. After that, when it is determined that the recording medium tray has been removed from the tray accommodating chamber based on a signal generated from the tray detecting means, the recording medium is discharged into the tray accommodating chamber. The image recording apparatus characterized by controlling the transport mechanism so as to perform the third operation for the second nip roller pair rotates in the reverse direction.   2. The image recording apparatus according to claim 1, wherein the control unit makes the conveyance speed in the second operation and the third operation lower than the conveyance speed at the time of recording.   In the second operation, the control unit has a rear end in the transport direction of the recording medium that is upstream of the second nip roller pair in the transport direction and a passage area through which the recording medium tray passes when being attached or detached. 3. The image recording apparatus according to claim 1, wherein the first and second nip roller pairs are rotated forward until the first and second nip roller pairs are positioned downstream in the transport direction. It is arranged at the upper part of the tray storage chamber, retracts from the passage area through which the recording medium tray passes when being attached and detached, and protrudes into the tray storage chamber, a retracted position that does not interfere with the recording medium being conveyed, A first movable guide that can take a guide position for guiding the recording medium conveyed from the second nip roller pair toward an opening communicating with the tray housing chamber in the housing;
4. The first movable guide takes the retracted position when the recording medium tray is attached and takes the guide position when the recording medium tray is not attached. The image recording apparatus according to any one of the above.   When the control unit determines that the recording medium tray has been removed from the tray storage chamber based on a signal generated from the tray detection unit after the second operation, the control unit includes the second supply unit. The conveyance mechanism is controlled to perform a fourth operation in which the first nip roller pair rotates forward until the recording medium that has been conveyed by one operation is discharged into the tray storage chamber. Item 5. The image recording apparatus according to any one of Items 1 to 4. Located in the lower portion of the tray storage chamber, retracts from the passage area through which the recording medium tray passes when being attached and detached, and protrudes into the tray storage chamber so as not to interfere with the recording medium being conveyed, A second movable guide capable of taking a guide position for guiding the recording medium conveyed from the first nip roller pair toward an opening communicating with the tray housing chamber in the housing;
6. The second movable guide according to claim 5, wherein the second movable guide takes the retracted position when the recording medium tray is attached and takes the guide position when the recording medium tray is not attached. Image recording device.   The control unit determines that a jam has occurred when it is detected that any one of all the recording media in the middle of conveyance is not conveyed to a predetermined position based on a signal emitted from the position detection unit. The image recording apparatus according to claim 1, wherein the image recording apparatus is an image recording apparatus. A notification unit for notifying the user that the recording medium tray is to be removed;
8. The control unit according to claim 1, wherein the control unit notifies the notification unit so as to notify the user of the fact after the second operation and before the third operation. The image recording apparatus according to any one of the above. The image recording apparatus according to claim 1, wherein the recording head includes an ejection port that ejects a liquid for recording an image on a recording medium.

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