JP6241484B2 - Recording device - Google Patents

Description

  The present invention relates to a recording apparatus that performs recording on a recording medium such as paper.

  Patent Document 1 is known as a technical document related to a recording apparatus. Patent Document 1 discloses a roller pair composed of rollers 21 and 22, a lever 25 that is movable between a position (FIG. 2) that holds the pressure contact state of the roller pair and a position (FIG. 3) that releases the pressure contact state of the roller pair. 1 discloses an image forming apparatus having a right door 7 or the like that is opened during jam processing. When the right door 7 is in the closed position, the lever 25 takes a position to maintain the pressure contact state of the roller pair, and is in contact with the right door 7 through the guide 8 (see FIG. 4).

JP 2001-201975 A

  By the way, the casing of the recording apparatus is composed of a first casing that supports the recording section and a second casing that supports the medium support section and the roller pair, and the first casing is relative to the second casing. It is possible to make it movable. The inventors of the present invention have noticed that the following problems may occur when the movable member as described above is provided when such a housing configuration is employed. That is, the positional relationship between the recording unit and the medium support unit is desired to be kept constant from the viewpoint of ensuring the recording quality, and is movable when the first housing is in a close position close to the second housing. When the urging force acting on the member acts on the first housing via the movable member, the position of the first housing changes, the position of the recording unit also changes, and consequently the position of the recording unit and the medium support unit The relationship will fluctuate. In Patent Document 1, when the right door 7 is in the closed position, the urging force of the compression spring 30 acts on the right door 7 via the lever 25, and thus the above problem may occur.

  An object of the present invention is to provide a recording apparatus that includes a movable member that can release the pressure contact state of a roller pair and that can maintain a constant positional relationship between the recording unit and the medium support unit.

  To achieve the above object, according to an aspect of the present invention, a recording unit that performs recording on a recording medium, a medium support unit that supports the recording medium at a recording position facing the recording unit, and a recording medium that includes the recording medium A pair of rollers that conveys the recording medium by rotating while sandwiching the recording medium so as to pass through the position, a first housing that supports the recording unit, and a second that supports the medium support unit and the roller pair. A housing, and a movable member capable of taking a pressure contact position for holding the pressure contact state of the roller pair and a pressure release position for releasing the pressure contact state of the roller pair, wherein the first housing is the second housing. It is movable with respect to the body, and by the movement, a proximity position close to the second housing and a separation position separated from the second housing than at the proximity position can be taken, and the movable The member is the first housing The pressure release position can be taken when in the separated position, the pressure contact position is taken when the first housing is in the proximity position, and the first housing moves from the separation position to the proximity position. By moving in contact with the contact portion of the first housing, the movable member moves from the pressure contact release position to the pressure contact position in conjunction with the first housing, and the movable member forms a pair of rollers. The first roller and the second roller are attached to the rotation shaft of the first roller, can be rotated with respect to the rotation shaft around the rotation shaft, and viewed from a direction parallel to the rotation shaft, A first cam surface that can come into contact with a second roller support portion that supports the second roller and a second cam surface that intersects the first cam surface in order along the rotation direction about the rotation axis. The first cam surface and the second cam surface A second cam surface inclined so as to approach the center of the rotating shaft along the rotation direction from the boundary portion of the first portion, and the length from the center of the rotating shaft to the first cam surface excluding the boundary portion Is larger than the length from the center of the rotating shaft to the second cam surface, and the first cam surface is opposed to the second roller support portion when the movable member is at the pressure release position, When the movable member is in the pressure contact position, the second cam surface faces the second roller support portion while being spaced apart, and when the movable member moves from the pressure release release position to the pressure contact position, the first cam The second cam surface is rotated after the surface is in sliding contact with the second roller support portion and in the direction opposite to the rotation direction about the rotation axis, and the boundary portion contacts the second roller support portion. Is spaced apart from the second roller support. And urging means for urging the movable member in a direction from the pressure release position to the pressure contact position and in a direction away from the contact portion, wherein the first housing is in the proximity position The biasing force acting on the movable member does not act on the first housing via the movable member, and the movable member in the pressure contact position does not contact the first housing. A recording device is provided.

Here, the “pressure contact state of the roller pair” means a state in which the rollers of the roller pair are in contact with each other with a pressure capable of conveying while sandwiching the recording medium. “Release the pressure contact state of the roller pair”
This means that the rollers in the roller pair are separated from each other, or the pressure between the rollers is reduced in a state where the rollers are in contact with each other as compared with the pressure contact state.

  According to the above aspect, when the first housing is in the proximity position, the biasing force that acts on the movable member does not act on the first housing via the movable member. Accordingly, it is possible to provide a movable member that can release the pressure contact state of the roller pair, and to maintain a constant positional relationship between the recording unit and the medium support unit.

  The movable member is attached to the rotation shaft of the first roller of the first roller and the second roller constituting the roller pair, and is rotatable with respect to the rotation shaft about the rotation shaft. In this case, the configuration can be simplified as compared with the case where a rotating shaft of the movable member is newly provided.

  The movable member is a first cam surface that can come into contact with a second roller support portion that supports the second roller in order along a rotation direction around the rotation axis as seen from a direction parallel to the rotation axis. And a second cam surface that intersects the first cam surface, except for a boundary portion between the first cam surface and the second cam surface, from the center of the rotating shaft to the first cam surface. The length is larger than the length from the center of the rotating shaft to the second cam surface. In this case, the pressure contact state of the roller pair can be released by bringing the first cam surface into contact with the second roller support portion, while the second cam surface is not brought into contact with the second roller support portion. The pressure contact state can be maintained. Therefore, the function of the movable member can be reliably realized with a simple configuration.

  The movable member does not come into contact with the first housing when in the pressure contact position. In this case, since no force acts on the first housing via the movable member, the positional relationship between the recording unit and the medium support unit can be more reliably maintained constant.

The movable member contacts the abutting portion of the first casing when the first casing moves from the separated position to the proximity position, thereby interlocking with the first casing and the pressure contact. Move from the release position to the pressure contact position. In this case, the operability for the user is improved as compared with the case where the movement of the first housing and the movement of the movable member are performed separately.
The recording apparatus according to the present invention further includes urging means for urging the movable member in a direction from the pressure release position toward the pressure contact position and in a direction away from the contact portion. In this case, it is possible to reliably realize a configuration in which the movable member is not in contact with the first housing when in the pressure contact position.

  The recording apparatus according to the present invention further includes a cover that is attached to the second housing and can take a cover position that covers the roller pair and an exposed position that exposes the roller pair, and the cover includes the first cover. When the casing moves from the separated position to the proximity position, the movable member moves from the exposed position to the cover position in conjunction with the first casing by contacting the first casing. When the first casing moves from the separated position to the proximity position, the cover contacts the first casing and moves from the exposed position to the cover position after the first casing contacts the first casing. The contact may move from the press contact release position to the press contact position in conjunction with the first housing. When the cover or the movable member comes into contact with the first housing, a force in a direction toward the separation position acts on the first housing. Here, when the cover and the movable member are in contact with the first housing at the same timing, the force in the above direction acts on the first housing at a time, so that a large force is required to move the first housing to the close position. Is required. On the other hand, as described above, when the cover and the movable member come into contact with the first housing at different timings, the force in the above direction does not act on the first housing at once and acts in a time-distributed manner. Will be. Thereby, the first housing can be moved to the proximity position with a relatively small force.

  The movable member may move from the pressure contact position to the pressure release position in conjunction with the first case when the first case moves from the proximity position to the separation position. Compared with the case where the movement of the first housing and the movement of the movable member are performed individually, the user operability is improved.

  The roller pair may be provided on the upstream side of the recording position with respect to the conveyance direction, which is a direction in which the recording medium is conveyed by the roller pair, and may remove paper dust attached to the recording medium. In particular, in an ink jet recording apparatus, when a recording medium is transported to a recording position with paper dust adhered, paper dust may enter a nozzle formed in the recording unit, and ink ejection performance from the nozzle may deteriorate. . According to the above configuration, the problem can be reduced.

  The roller pair may be provided on the upstream side of the recording position with respect to the conveyance direction, which is a direction in which the recording medium is conveyed by the roller pair, to correct skew of the recording medium.

  According to the present invention, when the first housing is in the proximity position, the urging force acting on the movable member does not act on the first housing via the movable member. Accordingly, it is possible to provide a movable member that can release the pressure contact state of the roller pair, and to maintain a constant positional relationship between the recording unit and the medium support unit.

1 is a perspective view showing an ink jet printer according to a first embodiment of the present invention, and is a perspective view showing a state where an upper housing is in a proximity position. FIG. It is a perspective view which shows the state which has an upper housing | casing in a separation position. 1 is a schematic diagram showing the inside of a printer. It is a perspective view which shows a lever and a roller pair, (a), (b) shows the press-contact state and press-contact release state of a roller pair, respectively. FIG. 5 is a partial cross-sectional view taken along line V-V in FIG. 1, showing a stepwise process in which the upper housing moves from the separation position to the proximity position, where (a), (b), and (c) are respectively the upper housing. The state when the angle θ with respect to the lower casing is 1 °, 0.5 °, and 0 ° is shown. (A), (b), (c) is an enlarged view showing regions VIA, VIB, VIC surrounded by the one-dot chain line in FIGS. 5 (a), (b), (c), respectively. It is a perspective view which shows the state which has a cover in an exposure position. FIG. 2 is a block diagram illustrating an electrical configuration of a printer. FIG. 7 is a partial cross-sectional view corresponding to FIG. 6, showing a step-by-step process of an upper casing from a proximity position to a separation position in an ink jet printer according to a second embodiment of the present invention. , (C) show states when the angle θ with respect to the lower casing of the upper casing is 0 °, 1 °, and 0.5 °, respectively.

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

  First, the overall configuration of the ink jet printer 1 according to the first embodiment of the present invention will be described with reference to FIGS.

  The printer 1 includes an upper casing 1a and a lower casing 1b that are both rectangular parallelepiped shapes. The upper housing 1a has an open bottom surface, and the lower housing 1b has an open top surface. The housings 1 a and 1 b seal the opening surfaces of each other, thereby defining the internal space of the printer 1.

  The upper housing 1a is rotatable with respect to the lower housing 1b in the direction A shown in FIG. 3 around the rotation axis 1x along the main scanning direction. The center of the rotation axis 1x is a point where the straight line V in the vertical direction and the straight line H in the sub-scanning direction intersect. The upper housing 1a can be rotated to a position that forms a predetermined angle (for example, approximately 30 °) with the lower housing 1b, and the proximity position (see FIGS. 1 and 3) close to the lower housing 1b by the rotation. 2) and a separation position (position shown in FIG. 2) that is farther from the lower housing 1b than at the proximity position. As shown in FIG. 2, when the upper casing 1a is in the separated position, a part of the conveyance path of the paper P is exposed to the outside, and a user's work space is provided between the upper casing 1a and the lower casing 1b. Secured. The user can manually perform jam processing (work for clearing jamming of the paper P in the transport path) using the work space.

  A paper discharge unit 1e is provided on the top plate of the upper housing 1a. A sheet storage unit 1c is mounted in the lower space in the lower housing 1b. The paper storage unit 1c can be attached to and detached from the lower housing 1b in the sub-scanning direction. A tray unit 1d is attached to the front surface of the lower housing 1b (the surface on the left front side in FIG. 1 and the surface on the left side in FIG. 3). The tray unit 1d can be opened and closed with respect to the lower housing 1b, and can support the paper P in the opened state.

  In the internal space of the printer 1 defined by the casings 1a and 1b, there are two cartridges (not shown) corresponding to the sheet storage unit 1c, the transport unit 40, the two heads 10, the two platens 50, and the two heads 10, respectively. ), And a control unit 100 for controlling each part of the printer 1 is disposed.

Based on a recording command supplied from an external device (such as a PC connected to the printer 1), the control unit 100 prepares for recording so that an image is recorded on the paper P, and supplies, conveys, and feeds the paper P. It controls the discharge operation, the liquid discharge operation synchronized with the conveyance of the paper P, and the like. In addition to a CPU (Central Processing Unit) which is an arithmetic processing unit, the control unit 100 includes a ROM (Read Only Memory), a RAM (Random Access Memory: including a non-volatile RAM), an ASIC (Application
Specific Integrated Circuit), I / F (Interface), I / O (Input / Output Port), and the like. The ROM stores programs executed by the CPU, various fixed data, and the like. The RAM temporarily stores data (image data and the like) necessary for executing the program. The ASIC performs rewriting and rearrangement of image data (for example, signal processing and image processing). The I / F performs data transmission / reception with an external device. I / O inputs / outputs detection signals of various sensors.

  The sheet storage unit 1 c includes a case 20 and a roller 21. The case 20 is a box whose upper surface is open and can accommodate a plurality of sheets P. The roller 21 is connected to a paper feed motor 21M (see FIG. 8), rotates under the control of the control unit 100, and sends out the uppermost paper P among the plurality of papers P accommodated in the case 20.

  The two heads 10 are arranged apart from each other in the sub-scanning direction, and are a precoat head that discharges the pretreatment liquid and an inkjet head that discharges black ink in order from the upstream side in the transport direction of the paper P. The heads 10 have the same structure, are line types that are long in the main scanning direction, and have a substantially rectangular parallelepiped outer shape. The lower surface of the head 10 is a discharge surface 10a in which a large number of discharge ports are opened. Inside the head 10, there is formed a flow path from the pretreatment liquid or black ink supplied from the cartridge (which may be collectively referred to as “liquid”) to the discharge port. The pretreatment liquid is a liquid having a function of preventing ink bleeding and back-through and a function of improving ink color development and quick drying.

The head 10 is fixed to the carriage 3, and the carriage 3 is supported by the upper casing 1a. In other words, the head 10 is supported on the upper casing 1 a via the carriage 3. On the other hand, the sheet storage unit 1c, the transport unit 40, the platen 50, and the tray unit 1d are supported by the lower casing 1b.

  The two platens 50 respectively correspond to the two heads 10 and have support surfaces 50a that support the paper P while facing the ejection surfaces 10a in the vertical direction.

  The transport unit 40 defines a path along which the paper P is transported. The paths are routed from the sheet storage unit 1c through the recording position (position facing the ejection surface 10a) to the paper discharge unit 1e, and from the opened tray unit 1d through the recording position. Path U, a part of R1, R2, R3 to the paper portion 1e. The transport unit 40 includes the following components that define the path.

  The path R1 is a path from the paper storage unit 1c to the recording position, and is defined by the guide 31a, the roller pair 22, the guide 31b, the roller pair 23, the guide 31c, the guide 31d, and the roller pair 24. These components are arranged in this order from the upstream side in the transport direction (the direction indicated by the dotted thick arrow).

  The path R <b> 2 is a path that passes through the recording positions of the two heads 10, and is defined by the guide 32 a, the pressing roller 33, and the roller pair 25. The guide 32 a, the holding roller 33, and the roller pair 25 are disposed between the two heads 10. The restraining roller 33 and the roller pair 25 are arranged in this order from the upstream side in the transport direction.

  The path R3 is a path from the recording position to the paper discharge unit 1e, and is defined by the guides 32b, 33a, 33b, the holding roller 35, and the roller pairs 26, 27, 28. The roller pairs 26 to 28 are arranged in this order from the upstream side in the transport direction. A plurality of restraining rollers 35 are provided along the path R3.

  Each of the roller pairs 22 to 28 includes a driving roller connected to the conveyance motor 40M (see FIG. 8) and a driven roller that rotates as the driving roller rotates. Each of the roller pairs 22 to 28 conveys the paper P by rotating while pinching the paper P in a pressure contact state. Each of the guides 31a to 31d, 32a, 32b, 33a, and 33b is formed of a member that is disposed so as to form a gap that becomes a conveyance path.

  The roller pair 23 has a function of removing paper dust adhering to the paper P. The roller pair 23 includes rollers 23a and 23b. The roller 23a is made of a material that is easily charged, such as a fluororesin, at least on the peripheral surface. A sponge 23s made of a material that easily charges the roller 23a, such as urethane foam, is pressed against the peripheral surface of the roller 23a. When the roller 23a rotates in this state, the peripheral surface of the roller 23a is charged by sliding with the sponge 23s, and the paper dust adhering to the paper P sandwiched between the rollers 23a and 23b is adsorbed on the peripheral surface of the roller 23a. Is done. The paper dust adsorbed on the peripheral surface of the roller 23a is scraped off from the peripheral surface of the roller 23a by the sponge 23s and is stored in a box 23c provided in the vicinity of the sponge 23s. The roller 23b is a driven roller that is made of rubber or the like and rotates with the rotation of the roller 23a that is a driving roller. A lever 70 (see FIG. 4) is attached in the vicinity of both ends of the shaft 23ax of the roller 23a. Further explanation of the roller pair 23 and the explanation of the lever 70 will be described later.

The roller pair 24 has a function of correcting skew (inclination) of the paper P. The roller pair 24 includes a roller 24a and a roller 24b. The roller 24b is a driving roller, and the roller 24a is a driven roller. The roller 24a is rotatably supported by the guide 31d and is connected to the electromagnetic clutch 24c (see FIG. 8). The roller 24a can rotate when the electromagnetic clutch 24c is on, and the roller 24a cannot rotate when the electromagnetic clutch 24c is off. The roller pair 24 can selectively take a rotatable state and a non-rotatable state by the on / off control of the electromagnetic clutch 24 c by the control unit 100. By this control, the roller pair 24 holds the leading edge of the paper P conveyed by the roller pair 23 in a non-rotating state for a predetermined time, and starts rotating after a predetermined time has elapsed. During the predetermined time, the entire leading edge of the paper P comes into contact with the roller pair 24, and the skew of the paper P is corrected. The sheet P is fed to the recording position after the skew is corrected in this way.

  The path from the open tray unit 1d through the recording position to the paper discharge unit 1e includes a path U, a downstream portion in the transport direction of the path R1, and paths R2 and R3. The path U is defined by a roller 29 connected to the transport motor 40M (see FIG. 8).

  Under the control of the control unit 100, the paper P sent out from the case 20 by the roller 21 is conveyed along the paths R1 to R3 and discharged to the paper discharge unit 1e. Alternatively, the sheet P sent out by the roller 29 from the opened tray unit 1d under the control of the control unit 100 is transported along the path U, the downstream portion in the transport direction of the path R1, and the paths R2 and R3. The paper is discharged to the paper discharge unit 1e. When the paper P sequentially passes directly under the head 10 (recording position) while being supported on the support surface 50a, each head 10 is driven by the control of the control unit 100, and is directed from the discharge port of the discharge surface 10a toward the paper P. Thus, an image is formed on the paper P by discharging the liquid.

  Next, the roller pair 23 and the lever 70 will be described with reference to FIGS.

  As shown in FIG. 4, the rollers 23 a and 23 b of the roller pair 23 have shafts 23 ax and 23 bx that are rotation centers, respectively. The shafts 23ax and 23bx are rotatably supported by the lower housing 1b. The roller 23b is urged toward the roller 23a by springs 23bs provided near both ends of the shaft 23bx.

  The lever 70 is rotatable about the shaft 23ax with respect to the shaft 23ax. That is, the lever 70 is freely attached to the shaft 23ax and can rotate independently of the roller 23a. The two levers 70 are respectively arranged on both sides of the roller 23a in the main scanning direction.

  The lever 70 has a pressure contact position (FIGS. 4A and 6C) that holds the pressure contact state of the roller pair 23 and a pressure contact release position that releases the pressure contact state of the roller pair 23 (FIG. 4B and FIG. 6 (a)). Here, the “pressure contact state of the roller pair 23” refers to a state in which the rollers 23a and 23b of the roller pair 23 are in contact with each other with a pressure that allows the paper P to be conveyed while being sandwiched. In other words, the pressure contact state of the roller pair 23 is a state where the rollers 23 a and 23 b are pressed against each other with a predetermined pressure in order to transport the paper P by the roller pair 23. “Release the pressure contact state of the roller pair 23” means that the rollers 23a and 23b of the roller pair 23 are separated from each other or the rollers 23a and 23b are in contact with each other, and the rollers 23a and 23b are more than in the pressure contact state. It means to reduce the pressure in between. In other words, the state where the pressure contact state of the roller pair 23 is released is a state where the rollers 23a and 23b are separated from each other, or a state where the pressure between the rollers 23a and 23b is reduced below a predetermined pressure. In the present embodiment, when the lever 70 is in the pressure release position, a slight gap is generated between the rollers 23a and 23b, and the rollers 23a and 23b are separated from each other.

When the lever 70 is in the pressure contact position, the roller pair 23 is in the pressure contact state by the urging force of the spring 23bs. At this time, even if the lever 70 is separated from the shaft 23bx or is in contact with the shaft 23bx, the lever 70 does not apply a force to the shaft 23bx so as to move the shaft 23bx against the urging force of the spring 23bs. .

  When the lever 70 is in the pressure release position, the lever 70 is in contact with the shaft 23bx and presses the shaft 23bx against the urging force of the spring 23bs. At this time, the shaft 23bx is located farther from the shaft 23ax than when the lever 70 is in the pressure contact position.

  A spring 70 s is attached to the lever 70. The spring 70s urges the lever 70 in the direction (X direction) from the pressure release position toward the pressure contact position.

  The lever 70 is in the pressure contact position when the upper housing 1a is in the close position, and is rotated manually by the user during the jam processing, and moves from the pressure contact position to the pressure release position. Hereinafter, the configuration of the lever 70 will be described in detail together with the jam processing procedure.

  When recording is interrupted due to the occurrence of a jam, the user rotates the upper housing 1a to move it from the proximity position (position shown in FIG. 1) to the separation position (position shown in FIG. 2). When the upper housing 1a is moved to the separation position, the contact portion 70a of the lever 70 is exposed. Immediately after the upper casing 1a moves from the close position to the separated position, the lever 70 is in the pressure contact position. Note that the lever 70 is not exposed when the upper housing 1a is in the proximity position. Then, the user moves the lever 70 in the pressure contact position (FIG. 4A) against the biasing force of the spring 70s in the Y direction (the direction opposite to the X direction) with the upper housing 1a disposed at the separation position. ) And move to the pressure release position (FIG. 4B). The user uses the work space formed between the upper housing 1a and the lower housing 1b in a state where the upper housing 1a is disposed at the separation position and the lever 70 is disposed at the pressure release position, The paper P jammed between the rollers 23a and 23b can be taken out. When the lever 70 is in the pressure release position, the pressure contact state of the roller pair 23 is released, so that the paper P positioned between the rollers 23a and 23b can be easily taken out.

  After the jam processing is completed, the user rotates the upper housing 1a to move from the separation position to the proximity position. At this time, as shown in FIGS. 5 and 6, the lever 70 moves from the pressure release position to the pressure contact position in conjunction with the upper housing 1a. Specifically, the lever 70 contacts the contact portion 1ax of the upper housing 1a in the process in which the upper housing 1a moves from the separation position to the close position (see FIGS. 5A and 6A). ) And then moved to the pressure contact position from the pressure release position by being pushed by the contact portion 1ax and rotating in the X direction (see FIGS. 5B, 5C and 6B, 6C). . The abutting portion 1ax is a member fixed to the upper casing 1a, and is disposed at a position where it abuts on the lever 70 at the pressure release position in the process of moving the upper casing 1a from the separation position to the close position. ing. The contact portion 1ax is generally downward in the vertical direction until it comes into contact with the lever 70 in the pressure release position (FIG. 5 (a)) and the upper housing 1a moves to the separation position (FIG. 5 (c)). Moving.

  When the upper housing 1a is in the close position, the lever 70 is in the press contact position (see FIGS. 5C and 6C). At this time, the lever 70 is not in contact with the upper housing 1a. In this state, a recording operation is performed.

The lever 70 has cam surfaces 71 and 72, convex portions 73 and 74, and a contact portion 70a. The cam surface 71 can face the shaft 23bx that supports the roller 23b. When the cam surface 71 faces the shaft 23bx, the cam surface 71 comes into contact with the shaft 23bx. The cam surface 72 can face the shaft 23bx, and the cam surface 72 does not contact the shaft 23bx when the cam surface 72 faces the shaft 23bx. The convex portion 73 is disposed adjacent to the cam surface 71. The convex portion 74 is disposed adjacent to the cam surface 72. The convex portions 73 and 74 are accommodated in the concave portions 1bx and 1by of the lower housing 1b, respectively, when the lever 70 is in the pressure contact position. The abutting portion 70a can abut on the abutting portion 1ax of the upper housing 1a, and in the process in which the upper housing 1a moves from the separation position to the close position in a state where the lever 70 is in the pressure contact releasing position. It contacts the contact part 1ax. The cam surfaces 71 and 72, the convex parts 73 and 74, and the contact part 70a are explained in full detail below.

  As shown in FIG. 6, the lever 70 has cam surfaces 71 and 72 in order along the rotational direction about the shaft 23ax when viewed from the main scanning direction (direction parallel to the shaft 23ax). The cam surface 71 is disposed upstream of the cam surface 72 in the counterclockwise direction in FIG. The cam surface 71 can contact the shaft 23bx that supports the roller 23b (see FIG. 6A). The cam surface 72 intersects the cam surface 71. Except for the boundary portion 79 between the cam surfaces 71 and 72, the length L1 from the center O of the shaft 23ax to the cam surface 71 is larger than the length L2 from the center O to the cam surface 72. The conditions of the lengths L1 and L2 are satisfied in any part of the cam surfaces 71 and 72. The length L1 is larger than the length from the point closest to the center O to the center O on the shaft 23bx when the roller pair 23 is in the pressure contact state. On the other hand, the length L2 is smaller than the length from the point closest to the center O to the center O in the shaft 23bx when the roller pair 23 is in the pressure contact state. The cam surface 71 extends in an orthogonal direction orthogonal to the radial direction of the center O. Note that the cam surface 71 may be slightly inclined with respect to the orthogonal direction so as to approach the center O in the clockwise direction in FIG. The cam surface 72 extends so as to intersect the orthogonal direction. Specifically, the cam surface 72 is inclined so as to approach the center O from the boundary portion 79 in the counterclockwise direction in FIG. Note that when the cam surface 71 is inclined, the inclination angle of the cam surface 71 is smaller than the inclination angle of the cam surface 72.

  When the lever 70 is in the pressure release position, the cam surface 71 faces the shaft 23bx, and the cam surface 72 does not face the shaft 23bx (see FIG. 6A). At this time, the shaft 23bx comes into contact with the cam surface 71 and is pressed by the cam surface 71 in a direction away from the shaft 23ax against the urging force of the spring 23bs. At this time, a reaction force against the urging force of the spring 23bs is generated on the cam surface 71. In other words, the urging force of the spring 23bs acts on the cam surface 71. The cam surface 71 extends in an orthogonal direction orthogonal to the radial direction of the center O. Therefore, even if the urging force of the spring 23bs acts on the lever 70, the urging force does not act as a force for rotating the lever 70 in the X direction in FIG. Even when the cam surface 71 is slightly inclined, the biasing force of the spring 23bs does not act as a force for rotating the lever 70 in the X direction in FIG. In this case, the biasing force of the spring 23bs works slightly as a force that rotates the lever 70 in the direction opposite to the X direction in FIG. The lever 70 is not rotated by the urging force of the spring 70 s and is held at the press contact release position due to the interaction between the urging force of the spring 23 bs and the reaction force generated on the cam surface 71. At this time, the shaft 23bx is accommodated in a recess formed by the convex portion 73 of the lever 70 and the cam surface 71.

  The contact portion 70a of the lever 70 is positioned above the center O in the vertical direction. The tip of the contact portion 70a is located on the upper side in the vertical direction when the lever 70 is in the pressure contact release position than when the lever 70 is in the pressure contact position. Further, the straight line connecting the tip of the contact portion 70a and the center O is inclined in the clockwise direction in FIG. 6 with respect to the vertical direction when the lever 70 is in the pressure release position. As a result, as the upper housing 1a moves from the separation position to the close position, the contact portion 1ax contacts the tip of the contact portion 70a of the lever 70 at the pressure release position, and the contact portion 1ax further When it moves downward in the vertical direction, the contact portion 70a moves downward in the vertical direction. That is, the tip of the contact portion 70a is pressed by the contact portion 1ax, and the lever 70 rotates in the X direction. When the movement of the upper housing 1a to the close position is completed, the lever 70 takes the pressure contact position. That is, the lever 70 moves from the pressure release position to the pressure contact position in conjunction with the movement of the upper housing 1a from the separation position to the proximity position.

In the state where the lever 70 is at the pressure release position, the roller pair 23 is separated from each other or the pressure contact force is reduced. When the paper P is transported in this state, problems such as jamming of the paper P and a decrease in transport accuracy may occur. In other words, the user moves the upper casing 1a to the separation position, moves the lever 70 to the press-contact release position, performs jamming, and then forgets to return the lever 70 to the press-contact position. When the paper P is transported and an image recording operation is performed on the paper P in a state where the paper is moved to the proximity position, problems such as jamming of the paper P and a decrease in transport accuracy may occur. In the present invention, since the lever 70 moves from the pressure contact release position to the pressure contact position in conjunction with the movement of the upper housing 1a from the separation position to the proximity position, the above-described problems can be suppressed.

  When the lever 70 moves from the pressure release position to the pressure contact position, the lever 70 rotates in the X direction while bringing the cam surface 71 into sliding contact with the shaft 23bx (see FIGS. 6A and 6B). Then, the boundary portion 79 comes into contact with the shaft 23bx (see FIG. 6B). Further, when the lever 70 rotates in the X direction, the cam surface 72 faces the shaft 23bx. That is, the shaft 23bx moves so as to face the cam surface 72 so as to get over the boundary portion 79 from the state in contact with the cam surface 71 while facing the cam surface 71. When the cam surface 72 faces the shaft 23bx, the cam surface 72 and the shaft 23bx do not come into contact with each other, so that the lever 70 is separated from the shaft 23bx (see FIG. 6C). At this time, the shaft 23bx moves in a direction approaching the shaft 23ax by the biasing force of the spring 23bs due to the absence of the pressing force from the lever 70. As a result, the roller pair 23 is in a pressure contact state. Further, since the cam surface 72 and the shaft 23bx do not contact each other after the boundary portion 79 contacts the shaft 23bx, the lever 70 has a mutual relationship between the biasing force of the spring 23bs and the reaction force generated on the cam surface 71. There is no effect. Therefore, regardless of the pressing force from the contact portion 1ax, the spring 70s is quickly rotated in the X direction by the biasing force of the spring 70s. And the lever 70 is arrange | positioned in a press-contact position simultaneously with the convex parts 73 and 74 of the lever 70 being accommodated in the recessed parts 1bx and 1by of the lower housing 1b, respectively.

  When the lever 70 is in the pressure contact position, the cam surface 72 faces the shaft 23bx, and the cam surface 71 does not face the shaft 23bx (see FIG. 6C). At this time, the lever 70 is held at the press contact position by the engagement between the convex portions 73 and 74 and the concave portions 1bx and 1by and the urging force of the spring 70s.

  As shown in FIGS. 1 and 7, a cover 60 covering the roller pair 23 and the roller 29 is attached to the lower casing 1b so as to be rotatable about an axis 60x parallel to the main scanning direction. . The cover 60 can take a cover position (FIG. 1) that covers the roller pair 23 and the roller 29 and an exposed position (FIG. 7) that exposes the roller pair 23 and the roller 29.

  The cover 60 is in the cover position when the upper housing 1a is in the close position. The cover 60 is disposed after the upper casing 1a is disposed at the separation position and the lever 70 is disposed at the pressure release position, or after the upper casing 1a is disposed at the separation position during the jam processing. Is placed in the Z direction before being placed at the pressure release position. When the cover 60 at the cover position is moved in the Z direction, the cover 60 moves from the cover position to the exposure position. The user takes out the paper P jammed between the rollers 23a and 23b in a state where the upper housing 1a is disposed at the separation position, the cover 60 is disposed at the exposure position, and the lever 70 is disposed at the pressure release position. be able to.

The cover 60 moves from the exposure position to the cover position in conjunction with the upper casing 1a by contacting the upper casing 1a when the upper casing 1a moves from the separation position to the close position. Specifically, with respect to the vertical direction, the portion of the cover 60 that is in the exposed position that makes contact with the upper housing 1a is higher than the portion of the lever 70 that is in the pressure release position that makes contact with the contact portion 1ax. In other words, the distance between the upper housing 1a at the separated position and the cover 60 at the exposed position is smaller than the distance between the contact portion 1ax of the upper housing 1a at the separated position and the lever 70 at the pressure release position. . Therefore, the cover 60 contacts the upper housing 1a before the lever 70 contacts the contact portion 1ax in the process in which the upper housing 1a moves from the separation position to the close position after the jam processing is completed. The cover 60 starts to rotate in the direction opposite to the Z direction substantially simultaneously with the contact with the upper housing 1a, and then rotates in the direction due to its own weight, so that the lever 70 contacts the contact portion 1ax. Also placed in front of the cover.

  As described above, according to the printer 1 of this embodiment, when the upper casing 1a is in the close position, the biasing force (for example, the biasing force of the spring 70s or the biasing force of the spring 23bs) acting on the lever 70 is the lever. It does not act on the upper housing 1 a via 70. Therefore, the lever 70 capable of releasing the pressure contact state of the roller pair 23 is provided, and the positional relationship between the head 10 and the platen 50 can be maintained constant.

  The lever 70 is attached to the shaft 23ax of the roller 23a constituting the roller pair 23, and is rotatable with respect to the shaft 23ax around the shaft 23ax. In this case, the configuration can be simplified as compared with the case where the rotation axis of the lever 70 is newly provided.

  The lever 70 has cam surfaces 71 and 72, and the length L1 from the center O of the shaft 23ax to the cam surface 71 is the length from the center O to the cam surface 72 except for the boundary portion 79 of the cam surfaces 71 and 72. Greater than L2. In this case, the pressure contact state of the roller pair 23 can be released by bringing the cam surface 71 into contact with the shaft 23bx, while the pressure contact state of the roller pair 23 is maintained so that the cam surface 72 is not brought into contact with the shaft 23bx. Can do. Therefore, the function of the lever 70 can be reliably realized with a simple configuration.

  The lever 70 does not contact the upper housing 1a when in the pressure contact position (see FIG. 6C). That is, when the lever 70 is in the pressure contact position, the contact portion 70a of the lever 70 and the contact portion 1ax of the upper housing 1a do not contact each other. In this case, since no force acts on the upper housing 1a via the lever 70, the positional relationship between the head 10 and the platen 50 can be more reliably maintained constant.

  The printer 1 further includes a spring 70s that urges the lever 70 in a direction from the pressure release position toward the pressure contact position. In this case, a configuration in which the lever 70 is not in contact with the upper housing 1a when the lever 70 is in the pressure contact position can be reliably realized.

  When the upper housing 1a moves from the separation position to the close position, the lever 70 moves from the pressure release position to the pressure contact position in conjunction with the upper housing 1a. In this case, the operability for the user is improved as compared with the case where the movement of the upper housing 1a and the movement of the lever 70 are individually performed.

  The lever 70 moves at a timing different from the timing at which the cover 60 contacts the upper housing 1a when the upper housing 1a moves from the separated position to the close position (in this embodiment, the cover 60 contacts the upper housing 1a). Prior to the contact timing, the contact with the upper housing 1a moves from the pressure release position to the pressure contact position in conjunction with the upper housing 1a. When the cover 60 and the lever 70 come into contact with the upper housing 1a, a force in the direction toward the separation position acts on the upper housing 1a. Here, when the cover 60 and the lever 70 come into contact with the upper casing 1a at the same timing, the force in the above direction acts on the upper casing 1a at a time, which is great for moving the upper casing 1a to the close position. Power is required. On the other hand, as described above, when the cover 60 and the lever 70 are in contact with the upper casing 1a at different timings, the force in the above direction does not act on the upper casing 1a at once, but is dispersed in time. Will act. Thereby, the upper housing | casing 1a can be moved to a proximity position with comparatively small force.

A roller pair 23 is provided on the upstream side of the recording position in the transport direction, and removes paper dust adhering to the paper P. In particular, in an ink jet recording apparatus, when the paper P is transported to the recording position with the paper dust adhered, the paper dust may enter the nozzles formed in the head 10 and the ink ejection performance from the nozzles may deteriorate. . According to the above configuration, the problem can be reduced. If the roller pair 23 is configured to be able to take the pressure release position when the upper housing 1a is in the close position, the paper dust removal performance by the roller pair 23 may be lowered. In this case, the paper P is transported to the recording position without the paper dust being removed by the roller pair 23, and the ink discharge performance may be deteriorated. That is, the user moves the upper casing 1a to the separation position, moves the lever 70 to the press-contact release position, performs jamming, and then forgets to return the lever to the press-contact position. When moved to a close position, the ink ejection performance can be degraded as described above. On the other hand, according to the present invention, the roller pair 23 moves from the pressure release position to the pressure contact position in conjunction with the movement of the upper casing 1a from the separation position to the proximity position. Can do.

  Next, a printer according to a reference example of the invention will be described with reference to FIG.

  The printer of this reference example is the same as that of the first embodiment except that when the upper casing 1a moves from the close position to the separated position, the lever 70 moves from the press contact position to the press release position in conjunction with the upper casing 1a. The configuration is the same as that of the printer 1.

  The lever 70 of the present reference example is different from the lever of the first embodiment in that the spring 70s is not attached and the protrusion 70p is provided at the tip. When the upper housing 1a is in the proximity position, the lever 70 is in the pressure contact position (see FIG. 9A), and at this time, the protrusion 70p is supported by the wall 1ay provided in the upper housing 1a. When the upper housing 1a moves from the close position to the separated position, the protrusion 70p moves upward together with the wall 1ay. Then, the lever 70 rotates in the Y direction (see FIG. 9B), and the protrusion 70p is separated from the wall 1ay. That is, when the upper housing 1a moves from the close position to the separated position, the wall 1ay pushes the protrusion 70p upward, whereby the lever 70 rotates in the Y direction. Then, the cam surface 71 is in contact with the shaft 23bx, and the lever 70 is disposed at the pressure release position (see FIG. 9C). Note that the wall 1ay is configured not to interfere with the protrusion 70p when the upper housing 1a moves from the separation position to the proximity position.

  According to this reference example, the operability for the user is improved as compared with the case where the movement of the upper casing 1a and the movement of the lever 70 are performed separately. In addition, according to this reference example, the same effects as those of the first embodiment can be obtained.

  Next, a printer according to a second embodiment of the invention will be described.

  The printer of the second embodiment is the same as that of the first embodiment except that the roller pair 23 has not only a function of removing paper dust attached to the paper P but also a function of correcting skew (inclination) of the paper P. The configuration is the same as that of the printer 1.

  In the second embodiment, an electromagnetic clutch 24c (see FIG. 8) is connected to the roller 23a, and the roller pair 23 is selectively turned on and off by the on / off control of the electromagnetic clutch 24c by the control unit 100. Can take on. The skew of the paper P is corrected by controlling the roller pair 23 in the same manner as described above for the roller pair 24. In the second embodiment, the roller pair 24 may not have a function of correcting the skew (inclination) of the paper P.

  According to the second embodiment, the same effect as that of the first embodiment can be obtained.

The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various design changes can be made as long as they are described in the claims.

The recording apparatus according to the present invention is not limited to a printer, and can be applied to a facsimile, a copier, and the like. Further, the recording apparatus is not limited to the ink jet type, and may be a laser type or the like. In the case of the laser type, the photoconductor corresponds to a recording portion, and when the positional relationship between the photoconductor and the recording medium varies, the pressure of the photoconductor on the recording medium varies, which may affect the recording quality.
The number of recording units included in the recording apparatus may be an arbitrary number of 1 or more.
The recording unit may eject any liquid other than the pretreatment liquid and ink, and may be a photoreceptor in the case of a laser type as described above.
The recording medium is not limited to the paper P, and may be any recordable medium.
The first housing is not limited to being rotatable with respect to the second housing, and may be movable in the horizontal direction or the vertical direction with respect to the second housing, for example.
-A 1st housing | casing may move with respect to a 2nd housing | casing, when a control part controls a mechanical mechanism irrespective of a user's manual operation.
The medium support unit may be a belt that travels in the transport direction while supporting the recording medium.

The roller pair may be provided on the downstream side of the recording position with respect to the transport direction.
-The roller pair may have only a function of correcting the skew of the recording medium, or both a function of removing paper dust adhering to the recording medium and a function of correcting the skew of the recording medium. It does not have to be.

-When a 1st housing | casing moves to a proximity position from a separation position, a movable member may contact | abut with a 1st housing | casing after the timing which a cover contact | abuts with a 1st housing. Further, when the first housing moves from the separation position to the proximity position, the cover may contact the first housing a plurality of times.
-When a 1st housing | casing moves to a close position from a separation position, a cover and a movable member may contact | abut with a 1st housing | casing at the same timing mutually.
-The cover may be omitted.

-A movable member may be moved not by a user's manual operation but by a control part controlling a mechanical mechanism.
-In the reference example of this invention, when a 1st housing | casing moves to a proximity position from a separation position, a movable member does not interlock | cooperate with a 1st housing | casing, but is independent from a 1st housing | casing, and is from a pressure release position. You may move to the pressure contact position. For example, before the first housing moves from the separation position to the proximity position, the movable member is moved from the pressure release position to the pressure contact position manually by the user or by the control unit controlling the mechanical mechanism. May be.
-In the reference example of this invention, when a movable member exists in a press-contact position, you may contact a 1st housing | casing. Even in this case, as long as the urging force acting on the movable member does not act on the first housing via the movable member, the problem of the present invention can be solved.
-In the reference example of this invention, you may abbreviate | omit the urging means which urges | biases a movable member in the direction which goes to a pressure contact position from a pressure release position. In this case, it is possible to increase the possibility that the movable member is in contact with the first housing when the movable member is in the pressure contact position, as compared with the case where the biasing means is provided. For example, in a configuration in which the movable member is attached to the roller pair, when the urging means is omitted, the movable member at the press contact position is rotated by the frictional force between the roller pair generated by the rotation of the roller pair. And can contact the first housing. However, even in such a case, as described above, as long as the urging force acting on the movable member does not act on the first housing via the movable member, the problem of the present invention can be solved. For example, when the spring 70 s is omitted in the above-described embodiment, the lever 70 in the pressure contact position rotates due to a frictional force between the shaft 23 ax caused by the rotation of the roller pair 23 and contacts the upper housing 1 a. Can do. In this case, the lever 70 can also contact the shaft 23bx. However, even in such a case, the force is balanced between the urging force of the spring 23bs and the reaction force of the shaft 23bx against the urging force at this time. 70, and the urging force of the spring 23bs does not act on the upper casing 1a via the lever 70.
-The 2nd roller support part which can contact the 1st cam surface of a movable member should just be a part which supports a 2nd roller, and is not limited to the rotating shaft of a 2nd roller. In the reference example of the present invention, the configuration of the movable member (including the configuration of the cam surface) can be arbitrarily changed.
-In the reference example of this invention, a movable member is not limited to being attached to the rotating shaft of 1 roller which comprises a roller pair, You may attach to a member different from a roller pair.
In the reference example of the present invention, the movable member is not limited to being rotatable, and may be movable in the horizontal direction or the vertical direction, for example.
When the movable member is in the pressure release position, the rollers of the roller pair are separated from each other in the above-described embodiment, but the pressure between the rollers is reduced as compared with the pressure contact state when the rollers are in contact with each other. Also good.
The number of movable members included in the recording apparatus may be an arbitrary number of 1 or more.

1 Inkjet printer (recording device)
1a Upper housing (first housing)
1b Lower housing (second housing)
10 head (recording part)
23 roller pair 23a roller (first roller)
23ax axis (rotary axis)
23b Roller (second roller)
23bx shaft (second roller support)
50 platen (medium support)
60 Cover 70 Lever (movable member)
70s spring (biasing means)
71 Cam surface (first cam surface)
72 Cam surface (second cam surface)
P paper (recording medium)

Claims (5)

A recording unit for recording on a recording medium;
A pair of rollers for conveying the recording medium by rotating while sandwiching the recording medium;
A first housing;
A second housing supporting the roller pair;
A movable member capable of taking a pressure contact position for holding the pressure contact state of the roller pair and a pressure release position for releasing the pressure contact state of the roller pair;
With
The first housing is rotatable with respect to the second housing, and is separated from the second housing more closely than the proximity position close to the second housing and the proximity position by the rotation. Can be separated from the
The movable member can take the pressure contact release position when the first housing is in the separated position, and takes the pressure contact position when the first housing is in the proximity position. When rotating from the separation position to the proximity position, by moving into contact with the contact portion of the first housing, the first housing moves in conjunction with the first housing from the pressure release position,
The movable member is attached to the rotation shaft of the first roller of the first roller and the second roller constituting the roller pair, and is rotatable with respect to the rotation shaft about the rotation shaft, A first cam surface that can come into contact with a second roller support portion that supports the second roller in order along a rotation direction about the rotation axis as viewed from a direction parallel to the rotation axis; and A second cam surface that intersects with one cam surface and is inclined from the boundary portion between the first cam surface and the second cam surface so as to approach the center of the rotating shaft along the rotational direction. And the length from the center of the rotating shaft to the first cam surface is greater than the length from the center of the rotating shaft to the second cam surface, excluding the boundary portion, and the movable member is The first cam surface is in the second position when in the release position. When the movable member is in the pressure contact position, the second cam surface is opposed to the second roller support portion while being spaced apart from the pressure release position. When moving to the pressure contact position, the first cam surface is rotated in the direction opposite to the rotation direction around the rotation axis while being in sliding contact with the second roller support portion,
After the boundary portion comes into contact with the second roller support portion, the second cam surface is opposed to the second roller support portion while being separated from the second roller support portion,
Biasing means for biasing the movable member in a direction from the pressure release position toward the pressure contact position and in a direction away from the contact portion;
When the first housing is in the proximity position, the urging force acting on the movable member does not act on the first housing via the movable member, and the movable member in the pressure contact position is the first A recording apparatus, wherein the recording apparatus is not in contact with a housing. A cover attached to the second housing and capable of taking a cover position covering the roller pair and an exposed position exposing the roller pair;
The cover contacts the first housing when the first housing moves from the separated position to the proximity position, and is moved from the exposed position to the cover position in conjunction with the first housing. Go to
The movable member is configured to move the cover from the exposed position to the cover position when the first casing is rotated from the separated position toward the proximity position. The recording apparatus according to claim 1, wherein the recording apparatus is moved from the press contact release position to the press contact position in conjunction with the first housing by contacting the first housing.   The movable member moves from the pressure contact position to the pressure release position in conjunction with the first case when the first case rotates from the proximity position toward the separation position. The recording apparatus according to any one of claims 1 and 2. A medium support unit that supports a recording medium at a recording position facing the recording unit, and the roller pair is provided upstream of the recording position with respect to a conveyance direction in which the recording medium is conveyed by the roller pair. The recording apparatus according to claim 1, wherein the paper dust attached to the recording medium is removed. The roller pair, said roller pairs by provided on the upstream side of the recording position with respect to the conveying direction in which the recording medium is conveyed, and correcting the skew of the recording medium, in claim 4 The recording device described.

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