JP2012152971A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily remove a jammed recording material being conveyed by a conveyance roller.SOLUTION: The recording device comprises: a conveyance roller including a conveyance drive roller which applies a conveying force to a recording material, and a conveyance driven roller which comes into press contact with the conveyance drive roller and is rotated by the conveyance drive roller; a recording head which performs recording on the recording material; a position switching mechanism for selecting a contact position where the conveyance driven roller comes in contact with the conveyance drive roller or a separated position where the conveyance driven roller is separated from the conveyance drive roller; a control unit which controls operation of the conveyance roller and the position switching mechanism; and a conveyance jam detection mechanism for detecting conveyance jam of the recording material. The control unit is configured to stop the conveyance roller when conveyance jam is detected by the conveyance jam detection mechanism, and to move the conveyance driven roller to the separated position by means of the position switching mechanism.

Description

  The present invention provides a transport roller comprising a transport drive roller that applies a transport force to a recording material, a transport driven roller that is in contact with the transport drive roller in a pressed state and that is driven to rotate by the transport drive roller, and the recording target The present invention relates to a recording apparatus including a recording head that performs recording on a material.

  In a recording apparatus such as an ink jet printer, a recording material is set in a feeding unit, and the recording material picked up by the feeding roller from the feeding unit is nipped by a conveyance roller located downstream thereof. It is sent toward the recording execution area (Patent Document 1). In the recording execution area, the back surface of the recording material is supported by a support portion, ink is ejected from the recording head, recording is performed on the front surface, and the recording material is nipped by a discharge roller located downstream of the recording execution area and stacked. Discharged to the position.

From the time when the leading edge of the recording material in the conveying direction is nipped by the conveying roller to the time when it passes through the recording execution area and is nipped by the discharging roller, the leading edge is simply supported by the support portion on the back surface. For this reason, there is rarely a conveyance clogging that is caught between the recording head and the support portion and cannot be sent due to deformation or curling of the tip. Further, if the deformation is large in the state where the leading end of the recording material is nipped by the discharge roller, the conveyance jam may occur.
The recording operation is stopped when the recording apparatus detects the occurrence of the transport jam. Then, the recording is resumed when the user takes out the jammed recording material.

JP 2005-280209 A

  However, the conventional recording apparatus has a problem that it is difficult to take out the jammed recording material because the conveying roller remains in the nip state when the user takes out the jammed recording material. In particular, since the conveying roller conveys the sheet toward the recording head, the nip force is very strong compared to the discharging roller. Therefore, depending on the type of recording material, the portion nipped by the conveying roller may be broken.

  An object of the present invention is to make it possible to easily take out a jammed recording material when the recording material being conveyed by the conveying roller is jammed.

  A recording apparatus according to a first aspect of the present invention includes a conveyance drive roller that applies a conveyance force to a recording material, a conveyance driven roller that is in contact with the conveyance drive roller in a pressed state and is rotated by the conveyance drive roller. A transfer roller, a recording head that performs recording on the recording material, a position switching mechanism that switches between a contact position of the transport driven roller that contacts the transport driving roller and a separated position that separates the transport driven roller, and the transport A control unit that controls the operation of the roller and the position switching mechanism, and a conveyance clogging detection mechanism that detects the occurrence of conveyance clogging of the recording material. The control unit detects conveyance clogging by the conveyance clogging detection mechanism. The transport roller is stopped when the transport roller is stopped, and the transport driven roller is moved to the separation position by the position switching mechanism. .

  According to this aspect, when the recording material being conveyed by the conveyance roller is jammed, the conveyance driven roller is moved to a position separated from the conveyance drive roller. Can be easily taken out.

  A recording apparatus according to a second aspect of the present invention is the recording apparatus described in the first aspect, further comprising a carriage mounted with the recording head and reciprocating in a direction intersecting a conveyance direction of the recording material. The conveyance clogging detection mechanism is configured to detect conveyance clogging from a change in a load of a carriage motor that moves the carriage, and the control unit also controls the operation of the carriage, and the conveyance clogging detection mechanism detects conveyance clogging. This is characterized in that the movement of the carriage is also stopped when this is detected.

  According to this aspect, in the recording apparatus having the structure in which the recording head is mounted on the carriage, when the conveyance jam occurs, the carriage cannot be moved normally due to the recording material. Therefore, it becomes possible to detect a conveyance jam from a change in the load of the carriage motor that moves the carriage, a decrease in the carriage movement speed, etc., and the conveyance jam is detected without increasing the number of parts. You can take action.

  A recording apparatus according to a third aspect of the present invention is the recording apparatus according to the first aspect or the second aspect, wherein the position switching mechanism is greater than an interval of the recording head with respect to the first recording material. For the second recording material, the recording head is moved in the separating direction so as to increase the interval, and the transport driven roller is also separated from the transport driving roller for the second recording material. The control unit operates the position switching mechanism when the transport clogging is detected, and executes the movement of the recording head and the transport driven roller to the separation side. It is comprised so that it may be comprised.

  According to this aspect, since not only the transport driven roller but also the recording head moves in the separating direction, the degree of openness around the jammed recording material increases. Therefore, when the recording material being conveyed by the conveying roller is jammed, the jammed recording material can be taken out more easily.

In addition, in the recording apparatus, not only recording on a sheet having a general thickness called plain paper (corresponding to the “first recording material” in the third aspect), but also a thick board A CD or DVD label (corresponding to the “second recording material” in the third mode) held on paper or a dedicated tray is provided. In this type of recording apparatus, there is provided a PG adjusting mechanism that makes the position of the recording head different from the position when recording on plain paper and the position when recording on the label of the CD using a dedicated tray. It has been.
In other words, the PG adjusting mechanism moves the recording head so that the interval for the CD label (second recording material) is larger than the interval for the recording head with respect to plain paper (first recording material). It is made to move in the separating direction. The PG adjusting mechanism is configured such that the transport driven roller is also moved to a position separated from the transport drive roller in conjunction with the movement of the recording head in the separation direction.
This aspect is equivalent to using the PG adjustment mechanism as the position switching mechanism. That is, the object of the present invention can be easily achieved by using an existing PG adjustment mechanism.

  A recording apparatus according to a fourth aspect of the present invention is the recording apparatus according to the third aspect, wherein the control unit moves the carriage to a moving end and then moves the transport driven roller to a separation position. It is comprised so that may be performed.

  According to this aspect, since the carriage is moved to the moving end and then the conveyance driven roller is moved to the separation position, when the carriage is moved to the moving end, the recording target is The material is nipped by the conveying roller and is in a restrained state. Therefore, the recording head can be easily released from the recording material that is clogged. In other words, the recording head can be retracted without deteriorating the jammed state of the recording material, and the degree of openness around the recording material in the conveyance jammed state can be increased, and the jammed recording material can be taken out more easily. Can do.

  A recording apparatus according to a fifth aspect of the present invention is the recording apparatus according to the fourth aspect, wherein the control unit is configured to move the carriage when the conveyance jam detection mechanism detects the conveyance jam. It is configured to move to the position of the moving end in the opposite direction.

  According to this aspect, since the transport jam detection mechanism is configured to move to the position of the moving end opposite to the moving direction of the carriage when the transport jam is detected, the recording material is jammed. The recording head can be retracted without deteriorating.

FIG. 3 is a side cross-sectional view illustrating a schematic structure of the recording apparatus according to the first embodiment of the invention when the recording material is conveyed normally. FIG. 3 is a side cross-sectional view illustrating a schematic structure of the recording apparatus according to the first embodiment of the invention when the recording material is in a jammed state. 6 is a flowchart for explaining the operation of the recording apparatus according to the first embodiment of the invention. FIG. 6 is a side cross-sectional view illustrating a schematic structure of a recording apparatus according to a second embodiment of the invention when a recording material is transported in a jammed state. 9 is a flowchart for explaining the operation of the recording apparatus according to the second embodiment of the invention.

  Hereinafter, the configuration and operation of the recording apparatus of the present invention will be described in detail with reference to Example 1 shown in FIGS. 1 to 3 and Example 2 shown in FIGS.

[Example 1] (See FIGS. 1 to 3)
The illustrated recording apparatus is an ink jet printer, but the present invention can be applied to all recording apparatuses in which a recording material is conveyed and conveyance clogging occurs. The ink jet printer according to the first embodiment includes a transport driving roller 2 that applies a transport force to the recording material 1, a transport driven roller 3 that is in contact with the transport driving roller 2 in a pressed state, and that is driven to rotate by the transport driving roller 2. And a recording head 5 that performs recording on the recording material 1.
Further, the ink jet printer switches between a contact position of the transport driven roller 3 that contacts the transport drive roller 2 (state shown in FIG. 1) and a separation position that separates the transport drive roller 2 (state shown in FIG. 2). A switching mechanism 6, a control unit 7 that controls operations of the transport roller 4 and the position switching mechanism 6, and a transport jam detection mechanism 8 that detects the occurrence of transport jam of the recording material 1 are provided.

  The conveyance drive roller 2 constituting the conveyance roller 4 is driven and rotated by receiving power from the conveyance drive roller driving unit 15 and applies a conveyance force to the recording material 1. The conveyance drive roller drive unit 15 employs a known structure including a drive motor and a toothed wheel train (not shown). The operation of the transport drive roller drive unit 15 is controlled by a control signal 43 sent from the control unit 7.

  The transport driven roller 3 constituting the transport roller 4 is held at one end of an arm 22 having a rotation fulcrum 14, and is pressed against the transport drive roller 2 with a set load by a spring (not shown). A cam follower 23 is provided at the other end of the arm 22, and the cam follower 23 constitutes a cam mechanism with the cam 12 having the rotation fulcrum 13. The cam 12 is rotated by the cam drive unit 11. The cam drive unit 11 is driven in response to a control signal 42 from the control unit 7.

  The position switching mechanism 6, that is, a position switching mechanism that switches between a contact position of the transport driven roller 3 that contacts the transport driving roller 2 (state in FIG. 1) and a separated position that separates from the transport drive roller 2 (state in FIG. 2). 6 is comprised by the arm 22 which has the said cam follower 23, the cam 12, and the cam drive part 11 in the present Example. The cam drive unit 11 receives the control signal 42 and switches between the “contact position” and the “separation position” of the transport driven roller 3.

The recording head 5 is controlled to eject ink from the ejection nozzles by a recording head driving unit 16. The recording head drive unit 16 is driven by receiving a control signal 44 from the control unit 7. The recording head drive unit 16 has a known structure. A support portion 21 is provided at a portion facing the recording head 5 to be in contact with and supported by the back surface of the recording material 1.
In this embodiment, the recording head 5 is mounted on a carriage 9 that reciprocates in a direction that intersects the conveyance direction of the recording material 1. Here, the recording head drive unit 16 is described as being located outside the carriage 9 in FIG. 1, but this is provided in the carriage 9 in order to avoid complication of the drawing.
Needless to say, the present invention can be provided even if the recording head 5 has a fixed structure such as a line printer.

  The carriage 9 is reciprocated by a carriage drive unit 10 in a direction intersecting the conveyance direction of the recording material 1. The carriage drive unit 10 employs a known structure using a carriage motor 35 as a power source, and is driven by receiving a control signal 41 from the control unit 7. In the figure, reference numeral 51 denotes a carriage guide shaft.

In the present embodiment, the conveyance jam detection mechanism 8 is configured to detect conveyance jam from a change in the load of the carriage motor 35 constituting the carriage drive unit 10 that moves the carriage 9. Specifically, the conveyance jam is detected from a change in the current value flowing through the carriage motor 35. In other words, in this embodiment, the transport jam detection mechanism 8 is configured using the carriage motor 35 that is a component of the carriage drive unit 10, and when the current value exceeds the set value, the transport jam occurs. A signal 31 is sent to the control unit 7 to determine and notify the conveyance jam.
The transport jam detection mechanism 8 is not limited to the above structure. For example, a sensor that detects conveyance clogging based on a decrease in the speed of the carriage 9 or detects the passage of the recording material 1 is provided, and the recording is performed by not detecting the passage of the recording material 1 at a set timing. For example, the conveyance jam of the material 1 may be detected.

  When the conveyance jam is detected by the conveyance clogging detection mechanism 8 and the signal 31 is sent, the control unit 7 stops the conveyance roller 4 and the position switching mechanism 6 separates the conveyance driven roller 3 from the separation. Configured to move to a position. In the figure, reference numeral 30 indicates information necessary for recording execution input at the time of recording execution.

  A discharge roller 19 for discharging the recording material 1 to the stack position is provided downstream of the recording head 5. The discharge roller 19 includes a discharge drive roller 17 and a discharge driven roller 18 that is pressed against the discharge drive roller and rotates. The discharge drive roller 17 is driven and rotated in conjunction with the transport drive roller 2. The discharge driven roller 18 is held by the arm 20.

Next, based on FIG. 2 and FIG. 3, the operation when the conveyance clogging of the recording apparatus of Embodiment 1 occurs will be described. The recording execution information 30 is sent to the control unit 7 and the recording execution operation is started (step S1). As shown in FIG. 2 when the recording material 1 is transported by the transport roller 4, the transport jam detection mechanism 8 detects the transport jam from the change in the current value flowing through the carriage motor 35 (see FIG. 2). Step S2). When the information is sent as a signal 31 to the control unit 7, the conveying roller 4 is stopped, the carriage driving unit is stopped, and the recording head driving unit 16 is stopped (step S3).
Subsequently, the carriage 9 is returned to the moving end such as the home position (step S4), and then the transport driven roller 3 is moved to the separation position by the position switching mechanism 6 (step S4). Since the paper jam is detected and the transport driven roller 3 is automatically moved to the separation position, the user can easily take out the jammed recording material 1.

[Example 2] (See FIGS. 4 to 5)
Since the basic structure of the ink jet printer of the second embodiment is the same as that of the first embodiment, only the differences will be described.
The position switching mechanism 6 performs the recording so that the interval is larger for a CD label or the like (second recording material) than the interval of the recording head 5 with respect to plain paper (first recording material). The head 5 is moved in the separation direction, and the conveyance driven roller 3 is also moved to a position separated from the conveyance driving roller 2 with respect to a CD label or the like (second recording material). . The controller 7 is configured to operate the position switching mechanism 6 when the transport clogging is detected, and to move the recording head 5 and the transport driven roller 3 to the separated side. ing.

In the recording apparatus, not only recording on a sheet having a general thickness called plain paper (corresponding to the “first recording material” in the third mode), A CD or DVD label (corresponding to the “second recording material” in the third mode) held on a dedicated tray is provided. In this type of recording apparatus, there is a PG adjustment mechanism that makes the position of the recording head 5 different from the position when recording on plain paper and the position when recording on a CD label using a dedicated tray. Is provided.
That is, the PG adjusting mechanism is configured so that the interval for the CD label (second recording material) is larger than the interval for the recording head 5 with respect to plain paper (first recording material). 5 is moved in the separating direction. The PG adjusting mechanism is further configured such that the transport driven roller 3 is also moved to a position separated from the transport driving roller in conjunction with the movement of the recording head in the separation direction.
The present embodiment corresponds to the one using the PG adjusting mechanism as the position switching mechanism 6. That is, the object of the present invention can be easily achieved by using an existing PG adjustment mechanism.

  According to this embodiment, not only the transport driven roller 3 but also the recording head 5 moves in the separating direction, so that the degree of opening around the jammed recording material can be increased. Therefore, when the recording material 1 being conveyed by the conveying roller 4 is jammed, the jammed recording material 1 can be taken out more easily.

  As a specific structure of the second embodiment, the carriage 9 on which the recording head 5 is mounted moves the carriage guide shaft 51 up and down by the guide shaft driving unit 50 (in a direction in which the recording head 5 approaches and separates from the support unit 21). It is configured to be movable). The guide shaft driving unit 50 employs a known structure using an eccentric shaft. The guide shaft driving unit 50 is driven in response to a control signal 45 from the control unit 7.

In the second embodiment, the discharge driven roller 18 constituting the discharge roller 19 is also configured to be switched between a position in contact with the discharge drive roller 17 and a position separated from the position. Specifically, the position switching mechanism 53 performs the switching.
The position switching mechanism 53 is configured as follows. The discharge driven roller 18 is held at one end of the arm 20 having the rotation fulcrum 56, and is pressed against the discharge drive roller 17 by a biasing member (not shown). A cam follower 57 is provided near the rotation fulcrum 56 of the arm 20, and the cam follower 57 constitutes a cam mechanism having a rotation fulcrum 54 and a cam 55. The cam 55 is rotated by the cam drive unit 52. The cam drive unit 52 is driven by receiving a control signal 46 from the control unit 7.

  The position switching mechanism 53, that is, the position switching mechanism 53 that switches between the contact position of the discharge driven roller 18 that contacts the discharge drive roller 17 and the separated position (state shown in FIG. 4) that is separated from the discharge drive roller 17 is the present embodiment. The arm 20 having the cam follower 57, the cam 55, and the cam drive unit 52 are configured. The cam driving unit 52 receives the control signal 46 and switches between the “contact position” and the “separation position” of the discharge driven roller 18.

  Next, based on FIG. 4 and FIG. 5, the operation at the time of occurrence of conveyance clogging of the recording apparatus of Embodiment 2 will be described. Steps S1 to S4 are the same as in the first embodiment. In step S 7 after step S 4, the transport driven roller 3 is moved to the separation position by the position switching mechanism 6, the recording head 5 is moved to the separation position by the guide shaft driving unit 50, and the position switching mechanism 53 performs the above-described operation. The discharge driven roller 18 is moved to the separation position. In this state, the user can take out the jammed recording material 1 more easily.

1 recording material, 2 transport drive roller, 3 transport driven roller, 4 transport roller,
5 recording head, 6 position switching mechanism, 7 control unit, 8 transport jam detection mechanism,
9 Carriage 10 Carriage drive unit 11 Cam drive unit 12 Cam
13 rotation fulcrum, 14 rotation fulcrum, 15 transport drive roller drive unit,
16 recording head drive unit, 17 discharge drive roller, 18 discharge driven roller,
19 discharge roller, 20 arm, 21 support, 22 arm,
23, cam follower, 30 record execution information, 31 signal to notify conveyance jamming,
41 control signal, 42 control signal, 43 control signal, 44 control signal,
45 control signal, 46 control signal, 50 guide shaft drive unit,
51 Carriage guide shaft 52 Cam drive unit 53 Position switching mechanism
54 fulcrum, 55 cam, 56 fulcrum, 57 cam follower

Claims (5)

A conveyance roller comprising: a conveyance drive roller that applies a conveyance force to the recording material; and a conveyance driven roller that is in contact with the conveyance drive roller in a pressed state and is driven to rotate by the conveyance drive roller;
A recording head for recording on the recording material;
A position switching mechanism for switching between a contact position of the transport driven roller contacting the transport driving roller and a separated position separating the transport driven roller;
A control unit for controlling operations of the transport roller and the position switching mechanism;
A conveyance clogging detection mechanism for detecting occurrence of conveyance clogging of the recording material,
The controller is configured to stop the transport roller when the transport jam is detected by the transport jam detection mechanism and to move the transport driven roller to the separation position by the position switching mechanism. A recording apparatus. The recording apparatus according to claim 1,
A carriage mounted with the recording head and reciprocatingly moved in a direction intersecting with a conveyance direction of the recording material;
The conveyance clogging detection mechanism is configured to detect conveyance clogging from a change in a load of a carriage motor that moves the carriage.
The recording apparatus is configured to control the operation of the carriage, and to stop the movement of the carriage when the conveyance jam is detected by the conveyance jam detection mechanism. The recording apparatus according to claim 1 or 2,
The position switching mechanism moves the recording head in the separation direction so as to increase the interval with respect to the second recording material relative to the interval between the recording head with respect to the first recording material, and the conveyance follower. The roller is also configured to move to a position separated from the transport driving roller with respect to the second recording material,
The control unit is configured to operate the position switching mechanism to detect movement of the recording head and the transport driven roller toward the separated side when the transport jam is detected. Recording device. The recording apparatus according to claim 3,
The recording apparatus, wherein the controller is configured to move the carriage driven roller to a separation position after moving the carriage to a moving end. The recording apparatus according to claim 4,
The recording apparatus, wherein the control unit is configured to move to a position of a moving end opposite to a moving direction of the carriage when the transport jam detection mechanism detects the transport jam.

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