JP2019167180A - Pressing tool and printing device - Google Patents

Abstract

To provide a pressing tool or the like that is excellent in operability for improving a complexity of work and that can easily place a printing medium in a conventional printing device in which the leading end of a printing medium is inserted between four small rollers and a paper holder provided at an appropriate interval in the width direction of the printing medium.SOLUTION: A pressing tool for temporarily pressing a printing medium on a conveyance surface is equipped with an operation unit that can change a holding state for temporarily pressing the printing medium and a released state for releasing the holding state, and removably attached to a structure provided above a conveyance surface.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a pressing tool that temporarily presses a print medium on a conveyance surface, and a printing apparatus including the pressing tool.

  Some printing apparatuses perform printing after an operator sets a print medium in advance on a conveyance surface of the printing apparatus. As such a printing apparatus, for example, a roller that conveys the print medium, a grip roller that sandwiches the print medium on the roller, a small roller that includes a one-way clutch, and a small roller that is pressed from above by a spring. A printing apparatus having a paper holder is known (see Patent Document 1). The small roller and the paper holder are provided on the upstream side of the grip roller in the conveyance direction of the print medium, and four small rollers are provided at an appropriate interval in the width direction of the print medium.

  The roller and grip roller for transporting the print medium, and the small roller and the paper holder are each configured to contact and be separated by operating the handle provided downstream in the transport direction. Yes.

  When setting the print medium in the printing apparatus, first, the front end of the print medium is transported from the upstream side in the transport direction with the roller and the grip roller for transporting the print medium and the small roller and the paper holder separated from each other. The print medium is manually inserted so that is positioned downstream of the grip roller in the transport direction. Next, the handle is turned one step to move the paper holder to the small roller side and press the print medium. Next, after fine adjustment of the print medium is performed while the print medium is being pressed by the paper holder, the handle is turned one more stage, and the print medium is sandwiched between a roller and a grip roller for conveying the print medium.

JP-A-5-193220

  In the conventional printing apparatus as described above, the front end of the print medium has to be inserted between four small rollers and a paper holder provided at appropriate intervals in the width direction of the print medium, and the work is complicated. It is. In addition, since the handle provided on the downstream side in the transport direction must be operated after the print medium is arranged on the transport surface, the print medium can be moved with one hand on the upstream side so that the print medium does not slide down. There is a problem that the operability is poor because the handle provided on the downstream side must be operated with the other hand while pressing.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a presser and a printing apparatus that are excellent in operability and easy to set a print medium.

A main invention for achieving the above object is a pressing tool for temporarily pressing a print medium on a conveyance surface, and includes a holding state in which the printing medium is temporarily pressed and a released state in which the holding state is released. A pressing tool comprising a changeable operation unit and detachably attached to a structure provided above the transport surface.
Other characteristics of the present invention will be made clear by the description and drawings described later.

  ADVANTAGE OF THE INVENTION According to this invention, it is excellent in operativity and can provide the pressing tool and printing apparatus which are easy to set a printing medium.

It is a figure which shows the printing apparatus with which the pressing tool which concerns on one Embodiment of this invention is used. It is sectional drawing which shows the pressing tool attached to the printing apparatus. It is the figure which looked at the pressing tool attached to the printing apparatus from the upstream. It is an enlarged view of the A section in FIG. It is the perspective view which looked at the pressing tool from the upstream. It is the perspective view which looked at the pressing tool from the downstream. It is the figure which looked at the pressing tool of the cancellation | release state from the direction in alignment with a rocking | fluctuation axis | shaft. It is the figure which looked at the holding | maintenance holding tool from the direction in alignment with a rocking | fluctuation axis | shaft. It is a schematic diagram for demonstrating the urging | biasing state to the conveyance surface side by a pressing tool.

Embodiments of the present invention will be described below with reference to the drawings.
The presser of this embodiment is used when a print medium is set in advance in a printing apparatus capable of printing on a large print medium such as a wide sheet. In the present embodiment, as an example of a printing apparatus, for example, an inkjet printing apparatus 1 as shown in FIG. 1 will be described as an example.

  In the following description, with the printing apparatus 1 installed, the vertical direction is the vertical direction, the direction in which the printing medium 2 is conveyed in the printing apparatus 1 is the conveyance direction, and the width of the printing medium 2 is orthogonal to the conveyance direction. The direction is shown as a width direction or a scanning direction in which a carriage 10 described later scans. Even if each part of the printing apparatus 1 and each member constituting the printing apparatus 1 are in a single state, the vertical direction, the transport direction, and the width direction in a state where the printing apparatus 1 is installed. Alternatively, the direction is specified in the scanning direction. Further, in the transport direction, a description will be given with respect to a printing area where ink is discharged and printing is performed, with the side that supplies the printing medium 2 being the upstream side and the side that discharges the printing medium 2 is the downstream side.

== Printer ==
For example, as shown in FIGS. 1 and 2, the printing apparatus 1 includes a print head 10a, a carriage 10, a rail unit 11, a bed unit 12, an upstream guide 13, a downstream guide 14, and a driving roller. 15 and a pinch roller 16.

  The print head 10a is a member that faces the print medium 2 and can eject ink toward the print medium 2. The print head 10a is mounted on the carriage 10 that is guided by the rail 17 and reciprocates in the scanning direction.

  Below the print head 10 a and the carriage 10, a bed unit 12 that forms a part of the transport surface 1 a of the print medium 2 is provided. The bed unit 12 is provided with a drive roller 15 that conveys the print medium 2 upstream from a portion facing the print head 10a, and a pinch roller 16 is abutted against the drive roller 15 from above. ing.

  In the printing apparatus 1, an operation lever (not shown) for separating the pinch roller 16 from the driving roller 15 is provided at one end in the scanning direction. The operation lever is provided so as to be operable from the upstream side.

  An upstream guide 13 that guides the print medium 2 is provided on the upstream side of the bed unit 12 on the upstream side of the transport surface 1 a of the bed unit 12. The upstream guide 13 forms a part of the transport surface 1a. A downstream guide 14 that guides the print medium 2 is provided on the downstream side of the bed unit 12 on the downstream side of the transport surface 1 a of the bed unit 12. The downstream guide 14 forms a part of the transport surface 1a. The transport surface 1a of the bed unit 12 forms a horizontal plane. On the other hand, the conveyance surface 1 a of the upstream guide 13 and the downstream guide 14 is formed so as to become lower as the distance from the bed unit 12 increases.

  Above the boundary between the bed unit 12 and the upstream guide 13 (above the transport surface 1a), a rail unit 11 having a rail 17 for guiding the carriage 10 is provided. The rail unit 11 includes an erection frame 18 that is stretched over the casing 1 b of the printing apparatus 1 along the scanning direction, and a rail 17 that is provided on the downstream side of the erection frame 18.

  The erection frame 18 is configured by joining two steel plate frames 181 and 182 that have been subjected to bending. In the following description, one of the two frames 181 and 182 is referred to as a downstream frame 181 located on the downstream side, and the other is referred to as an upstream frame 182 located on the upstream side.

  The downstream frame 181 includes a top plate portion 181a, a bottom plate portion 181b, a downstream side wall portion 181c, and a bottom plate extending portion 181d. The top plate portion 181a and the bottom plate portion 181b are provided at an interval in the vertical direction. The downstream side wall portion 181c connects the end portions on the downstream side of the top plate portion 181a and the bottom plate portion 181b. The bottom plate extension 181d extends upward from the upstream edge of the bottom plate 181b. The upstream surface of the bottom plate extension 181d is located downstream from the upstream edge of the top plate 181a.

  The upstream frame 182 includes a facing joint 182a, an upstream extension 182b, an upstream side wall 182c, and an upstream joint 182d. The facing joint 182a faces and is joined to the upstream surface of the bottom plate extension 181d. The upstream extension part 182b extends upstream from the upper edge of the facing joint part 182a. The upstream side wall part 182c extends upward from the upstream edge of the upstream extension part 182b, and faces the downstream side wall part 181c with a gap in the conveyance direction. The upstream joint portion 182d extends downstream from the upper edge of the upstream side wall portion 182c and is joined on the upstream end portion of the top plate portion 181a.

  The downstream frame 181 and the upstream frame 182 form a hollow portion 18a penetrating in the scanning direction in a joined state, and the facing joint portion 182a protrudes below the bottom plate portion 181b.

  When printing is performed by the printing apparatus 1, first, the pinch roller 16 is separated from the driving roller 15, and the front end of the printing medium 2 is disposed sufficiently downstream from the printing area. Thereafter, it is necessary to set the printing medium 2 on the transport surface 1a by releasing the separated state of the pinch roller 16 and holding the printing medium 2 between the driving roller 15 and the pinch roller 16 (main pressing). is there. At this time, the large-sized printing medium 2 having a particularly wide width is easily slipped off from the conveying surface 1a due to its own weight, and is difficult to be inserted between the drive roller 15 and the pinch roller 16 in the separated state. Difficult to set in position.

  Therefore, when the printing medium 2 is set on the transport surface 1a, the printing medium 2 is temporarily pressed using the pressing tool 3 according to the present embodiment. “Temporary press” means that the print medium 2 can move downstream in the transport direction but cannot move upstream in the transport direction.

== Presser ==
As shown in FIGS. 5 and 6, the pressing tool 3 of the present embodiment includes an attachment member 4, a swinging member 5, a swinging shaft 6, and a tension coil spring 7 (biasing member). The attachment member 4 is detachably attached to the installation frame 18 as a structure of the printing apparatus 1 from the upstream side. The swing member 5 is pivotally supported by the mounting member 4 and swings between predetermined positions. The swing shaft 6 supports the swing member 5 on the mounting member 4 so as to be swingable. One end of the tension coil spring 7 is locked to the mounting member 4, and the other end is locked to the swing member 5.

  The attachment member 4 includes a main body member 41 that supports the swing member 5 and a magnet unit 42 that is fixed to the main body member 41.

  The main body member 41 includes a pair of main body side wall portions 41a, a main body connecting portion 41b, and a main body upper extending portion 41c. The pair of main body side wall portions 41a are provided to face each other with a space therebetween in the scanning direction. The main body connecting part 41b connects the downstream edge of the main body side wall part 41a. The main body upper extending portion 41c extends upstream from the upper edge of the main body connecting portion 41b.

  A U-shaped notch 41d having an open lower part and an upper part having an arc shape is provided on the upstream side of the main body side wall 41a. A main body downstream extending portion 41e extending downstream from the main body connecting portion 41b is provided at a downstream side of the main body side wall portion 41a. A main body protrusion 41f that protrudes upward is provided at the downstream end of the main body downstream extension 41e.

  Further, the main body upper extending portion 41c is provided with a locking hole 41g in which a hook 7a that forms one end of the tension coil spring 7 is locked at a substantially center between the pair of main body side wall portions 41a. A magnet unit 42 is fixed to the downstream surface of the main body connecting portion 41b.

  The magnet unit 42 includes a rectangular parallelepiped magnet 43 and a magnet fixing bracket 44 to which the magnet 43 is attached and fixed to the main body connecting portion 41b. The magnet fixing bracket 44 includes a fixing plate portion 44a to which the magnet 43 is attached and screwed to the main body connecting portion 41b, an upper extension piece 44b extending from the upper and lower edges of the fixing plate portion 44a to the downstream side, and And a lower extension piece 44c. The extension amount of the upper extension piece 44b and the lower extension piece 44c from the fixed plate portion 44a is equal, and is formed slightly larger than the thickness of the magnet 43 attached to the fixed plate portion 44a in the transport direction. For this reason, when the presser 3 is attached to the installation frame 18 by the magnet 43, the tips of the upper extension piece 44 b and the lower extension piece 44 c are brought into contact with the facing joint portion 182 a of the installation frame 18. Are attached without being inclined with respect to the plane of the facing joint 182a.

  The swing shaft 6 is a special screw provided with a cylindrical head portion 6a and a screw portion 6b. The tip of the head 6a has a wrench hole 6c into which a hexagonal recess is formed and a hexagon wrench is inserted. The peripheral surface of the head 6a is formed with a diameter smaller than the diameter of the head 6a and is connected in the circumferential direction. A circumferential groove 6d is provided. The groove width of the peripheral groove 6d is slightly wider than the plate thickness of the main body side wall 41a, and the diameter of the peripheral groove 6d is slightly smaller than the diameter of the arc of the notch 41d provided in the main body side wall 41a. Yes.

  The swing member 5 includes a pair of swing side wall portions 5a, a swing connecting portion 5b, a swing upper extending portion 5c, and a swing lower extending portion 5d. The pair of oscillating side walls 5a are provided to face each other with a space therebetween in the scanning direction. The swing connecting part 5b connects the upstream edge of the swing side wall part 5a. The swinging upper extension 5c extends upstream from the upper edge of the swinging connection 5b. The swinging lower extending part 5d extends downstream from the lower edge of the swinging connecting part 5b.

  The interval between the outer surfaces of the two oscillating side walls 5a (the width of the oscillating member 5 in the scanning direction) is formed wider than the interval between the opposing surfaces of the two main body side walls 41a of the main body member 41. Each of the two oscillating side walls 5a is provided with a shaft insertion hole 5e into which the threaded portion 6b of the oscillating shaft 6 is inserted. The shaft insertion hole 5e is disposed on the upper end side of the swing side wall portion 5a. Each shaft insertion hole 5e is subjected to burring processing that protrudes to the opposite sides. The threaded shaft 6 has a threaded portion 6b screwed into the shaft insertion hole 5e. The swing shaft 6 may be rotatably inserted into a shaft insertion hole 5e formed slightly larger than the diameter of the screw portion 6b. In this case, the swing shaft 6 is a pin in which no screw groove is formed. It doesn't matter.

  A locking hole 5f is provided on the lower end side of the swing connecting portion 5b so as to be positioned substantially at the center between the pair of swing side wall portions 5a. The hook 7a that forms the other end of the tension coil spring 7 is locked in the locking hole 5f. In addition, a rectangular long hole 5g is provided in the central portion of the swing connecting portion 5b. The long hole 5g is connected from the upper part of the locking hole 5f to the downstream end of the swinging upward extending part 5c, and the hook 7a of the tension coil spring 7 is inserted therethrough.

  Two pressing members 8 arranged side by side in the scanning direction are attached to the lower surface of the swinging lower extending portion 5d. The pressing member 8 forms a contact portion that contacts the print medium 2. The pressing member 8 is made of a soft resin such as rubber, for example. The pressing member 8 has a dome shape having a flat surface 8a at the tip and a curved portion 8b around it. The pressing member 8 is attached so as to protrude downward with respect to the swinging downward extending portion 5d.

  The pressing member 3 is assembled by inserting a swinging member 5 to which a swinging shaft 6 and a pressing member 8 are attached between two main body side wall portions 41a. At this time, the edge of the U-shaped notch 41d provided in the main body side wall 41a is inserted into the circumferential groove 6d of the swing shaft 6 attached to the swing side wall 5a, and the attachment member 4 is locked. When the hook 7a of the tension coil spring 7 is locked in the hole 41g and the locking hole 5f of the swing member 5, the circumferential groove 6d of the swing shaft 6 is brought into contact with the arc portion of the notch 41d. In this state, the swing member 5 can swing while being biased by the tension coil spring 7 about the swing shaft 6.

== Presser attached to the structure ==
As shown in FIGS. 3 and 4, the presser 3 according to this embodiment is attached to the erection frame 18 of the printing apparatus 1. Specifically, as shown in FIGS. 7 and 8, the presser 3 is configured so that the upper edge of the main body downstream extension portion 41 e of the attachment member 4 is brought into contact with the lower edge of the facing joint portion 182 a of the installation frame 18. The tip of the upper extension piece 44b and the lower extension piece 44c of the magnet unit 42 is brought into contact with the facing joint portion 182a in a state where the main body protrusion 41f is arranged on the downstream side of the facing joint portion 182a. Attached to the frame 18.

  The pressing tool 3 attached to the installation frame 18 can swing the swinging member 5 by operating the swinging upper extending portion 5c of the swinging member 5 in the vertical direction. At this time, when the printing medium 2 is not present, the pressing member 8 can be changed between a state where the pressing member 8 is in contact with the transport surface 1a of the upstream guide 13 and a state where the pressing member 8 is separated. In the state where the print medium 2 is present, a holding state in which the print medium 2 is temporarily pressed on the transport surface 1a, and a release state in which the press member 8 is separated from the print medium 2 and the transport surface 1a and the holding state is released. Can be changed. In the present embodiment, the swinging upward extending portion 5c corresponds to the operation portion.

  When the swinging upper extending portion 5c is moved downward, as shown in FIG. 7, both ends of the tension coil spring 7 are viewed from the direction along the swinging shaft 6 (direction perpendicular to the paper surface in FIG. 7). Since the straight line L connecting the locking point P1 where the hook 7a is locked is located downstream from the center P0 of the swing shaft 6, the lower end side of the swing member 5 is pulled downstream. At this time, the released state is maintained by the edge of the swing side wall portion 5a being in contact with the lower edge of the main body connecting portion 41b while being pulled by the tension coil spring 7. The position of the swing member 5 at this time corresponds to the release position.

  On the other hand, when the swinging upward extending portion 5c is moved upward, the straight line L is upstream of the center P0 of the swinging shaft 6 when viewed from the direction along the swinging shaft 6, as shown in FIG. Therefore, the lower end side of the swing member 5 is pulled upstream. At this time, if the presser 3 is a single unit, it swings to a position where the bent portion between the swinging upper extending portion 5c and the swinging connecting portion 5b contacts the upstream end of the main body extending portion 41c. It is set to be possible.

  When the state changes from the state shown in FIG. 7 to FIG. 8, the swing member 5 swings about the swing shaft 6. At this time, as shown in FIG. 9, the track K of the pressing member 8 is slightly higher than the upstream conveying surface 1a from the position where the pressing member 8 is slightly higher than the downstream conveying surface 1a with respect to the conveying surface 1a. An arc that goes to a lower position. For this reason, when the swinging member 5 swings upstream from the released state, the pressing member 8 approaches the transport surface 1 a as the swinging member 5 swings. Then, at a position where the distance from the swing shaft 6 to the conveying surface 1a is shorter than the distance from the swing shaft 6 to the surface of the pressing member 8, the swing member 5 cannot move upstream, and is held. It becomes. The position of the rocking member 5 at this time corresponds to the pressing position.

  Even in the holding state, the oscillating member 5 is not in contact with the mounting member 4, so that the oscillating member 5 continues to be urged to move upstream by the tension coil spring 7. With this urging force, the state in which the pressing member 8 is pressed toward the transport surface 1a is maintained.

  Here, when the swing member 5 in the holding state swings to the downstream side, the pressing member 8 moves in a direction away from the transport surface 1a, so that swinging to the downstream side is allowed. In other words, the swing member 5 is allowed to swing downstream while being urged upstream by the tension coil spring 7 in a state where the straight line L is located upstream from the center P0 of the swing shaft 6. Yes. Further, when the swinging member 5 is about to swing upstream in the holding state, the pressing member 8 acts so as to press the conveying surface 1a, so that the swinging member 5 swings upstream. Can not. For this reason, the printing medium 2 that is pressed against the conveying surface 1a by the contact of the pressing member 8 does not move upstream. On the other hand, when the straight line L moves downstream from the center of the swing shaft 6, the swing member 5 is pulled downstream by the tension coil spring 7, moved to the release position, and released. Has been.

== Work when setting print media in printing apparatus ==
When the printing medium 2 is set on the transport surface 1 a using the presser 3, the user of the printing apparatus 1 first separates the pinch roller 16 from the drive roller 15 and attaches the presser 3 to the installation frame 18. At this time, the pressing member 8 is separated from the conveying surface 1a by moving the swinging upper extending portion 5c downward and placing the swinging member 5 at the release position. At this time, the presser 3 is arranged in the scanning direction on the side opposite to the side (hereinafter referred to as the lever side) on which the operation lever for separating the pinch roller 16 from the driving roller 15 is provided (hereinafter referred to as the opposite side). Install it close to the lever side.

  The user stands on the upstream side in the transport direction, places the print medium 2 along the upstream guide 13, and inserts the front end of the print medium 2 between the transport surface 1 a and the presser 3. At this time, first, the user stands on the side opposite to the lever and inserts the end on the side opposite to the lever of the print medium 2 first.

  Next, the user moves to the lever side, presses the print medium 2 toward the transport surface 1a side with one hand, and moves the swinging extension portion 5c upward with the other hand to print the print medium 2. Temporarily press. At this time, since the main body protrusion 41f is arranged on the downstream side of the facing joint portion 182a, even if the swinging upward extending portion 5c is moved upward with a force stronger than expected, the main body protrusion 41f is moved to the facing joint portion. The presser 3 is not detached by being caught by 182a. Further, by attaching the presser 3 close to the non-lever side, after inserting both end portions in the width direction of the printing medium 2, it stands on the side provided with the lever to be operated immediately after. For this reason, it is desirable that the presser 3 is attached to the side opposite to the lever.

  Thereafter, the user presses the end of the print medium 2 on the lever side, feeds the print medium 2 to the downstream side while correcting the inclination, and passes between the pinch roller 16 and the drive roller 15. At this time, the wide print medium 2 can be rotated around the pressing member 8 since one side in the width direction is temporarily pressed by the pressing member 8 at one point. Further, since the printing medium 2 temporarily pressed by the pressing member 8 does not move to the upstream side, it does not slide down from the transport surface 1a. Therefore, the user can easily correct the inclination by rotating the print medium 2 on the conveyance surface 1a while feeding the print medium 2 downstream without paying attention to holding the print medium 2 on the conveyance surface 1a. it can. Then, the user sends the print medium 2 to the downstream side until the front end of the print medium 2 is located sufficiently downstream of the pinch roller 16 and the drive roller 15.

  Finally, the user operates the operating lever with the other hand while pressing the lever side portion of the printing medium 2 with the other hand, while holding the printing medium 2 with the other hand. Hold with. With this operation, setting of the print medium 2 to the printing apparatus 1 is completed.

  Thereafter, a printing operation is executed. At this time, the presser 3 may be removed, attached in a released state, or printed in a held state.

  Thus, the presser 3 according to the present embodiment temporarily presses the print medium 2 on the transport surface 1a. The presser 3 includes a swinging and extending portion 5c (operation unit) that can change a holding state in which the printing medium 2 is temporarily pressed and a released state in which the holding state is released. The presser 3 is removably attached to a construction frame 18 (structure) provided above the transport surface 1a. Therefore, it is possible to easily change the holding state of the print medium 2 and the release state of the print medium 2 by operating the swinging upward extending portion 5c. Therefore, according to the size and state of the print medium 2, the holding state of the print medium 2 and the release state of the print medium 2 can be easily changed with the presser 3 attached to a desired position of the installation frame 18. Therefore, even a large print medium can be easily set to the printing apparatus 1.

  Further, the presser 3 can freely set a position for temporarily pressing the print medium 2 by changing the presser 3. For this reason, it is not necessary to provide a plurality of members for temporarily pressing the print medium 2 in the printing apparatus 1 in consideration of the widths of a plurality of types of print media 2. In other words, the minimum necessary pressing tool 3 may be attached in accordance with the size of the print medium 2 to be set. For this reason, since there are few gaps where the tip of the print medium 2 is inserted, the print medium 2 is more easily inserted. Moreover, since there are few places pressed by the conveyance surface 1a, the frictional resistance at the time of adjusting the position of the printing medium 2 is small. For this reason, it is possible to easily adjust the position of the print medium 2 on the transport surface 1a.

  Moreover, the pressing tool 3 of the present embodiment includes an attachment member 4 that is detachably attached to the installation frame 18 (structure), a swing member 5, and a tension coil spring 7 (biasing member). The swinging member 5 is supported by the mounting member 4 via the swinging shaft 6, and a temporary pressing position where the printing medium 2 is temporarily pressed by a swinging upper extending portion 5 c (operation unit) and a holding state. It can swing between the released release positions. The tension coil spring 7 is interposed between the swing member 5 and the attachment member 4 and urges a force to maintain either the holding state or the released state. The swing member 5 of the present embodiment includes a pressing member 8 (contact portion). The pressing member 8 is separated from the printing medium 2 by swinging to one side when the swinging member 5 is in the released state, and is also moved to the other side by swinging to the other when the swinging member 5 is in the holding state. Configured to come into contact. At this time, since the tension coil spring 7 is energizing to maintain either the holding state or the released state, the pressing member 8 is separated from the printing medium 2 or the pressing member 8 is printed. Either one of the states in which the medium 2 is pressed can be maintained, the operability of the temporary pressing of the print medium 2 is excellent, and the print medium 2 can be easily set in the printing apparatus.

  Moreover, after changing the release state and the hold state, the hold state or the release state can be maintained by the tension coil spring 7 interposed between the swing member 5 and the attachment member 4. For this reason, after setting the holding state, the user can set the print medium 2 by adjusting the position with both hands. Alternatively, after the release state, the print medium 2 can be detached with both hands by releasing the hand from the swinging extension 5c.

  Further, the biasing member of the present embodiment is a tension coil spring 7 having one end locked to the mounting member 4 and the other end locked to the swing member 5. Further, when viewed from the axial direction of the swing shaft 6, a straight line L connecting the two points P <b> 1 where both ends of the tension coil spring 7 are locked is positioned on the pressing position side with respect to the swing shaft 6 in the holding state, In the released state, it is located closer to the release position than the swing shaft 6. For this reason, it is possible to switch the position between the holding state and the release state by the biasing force of the tension coil spring 7.

  Specifically, when the swing member 5 swings from the released state to the upstream side, the press member 3 swings as the press member 8 approaches the transport surface 1a as the swing member 5 swings. At a position where the distance from the shaft 6 to the conveying surface 1a is shorter than the distance from the swing shaft 6 to the surface of the pressing member 8, the swing member 5 cannot move upstream and is held. Even in this holding state, the tension coil spring 7 urges the swing member 5 to move upstream, so that the printing medium 2 is sandwiched between the transport surface 1 a and the pressing member 8 by this urging force. Has been.

  For this reason, when the print medium 2 is about to move to the upstream side opposite to the transport direction due to its own weight or the like, the pressing member 8 swings in the direction of pressing the print medium 2 against the transport surface 1a and is held. Strength increases. Therefore, even when the print medium 2 is about to move in the direction opposite to the transport direction, the print medium 2 can be held on the transport surface 1a.

  Further, when the swinging member 5 swings downstream from this holding state, the swinging member 5 is moved in a direction in which the distance from the swinging shaft 6 to the transport surface 1a is increased. Permissible. That is, in the holding state, the swinging of the swinging member 5 to the upstream side is restricted, and the swinging to the downstream side is allowed.

  For this reason, when the front end of the print medium 2 is inserted and temporarily pressed between the transport surface 1a and the presser 3, the press member 8 that is in contact with the print medium 2 is moved when the print medium 2 is moved downstream. The oscillating member 5 provided with oscillates downstream. For this reason, it is possible to set the print medium 2 with the inclination corrected while feeding the print medium 2 downstream so that the front end of the print medium 2 is located sufficiently downstream of the pinch roller 16 and the drive roller 15. It is. At this time, since the print medium 2 does not move upstream, the user does not always need to hold the print medium 2 by hand, and the user can easily hold the print medium 2 in an appropriate posture and position using both hands. Can be set.

  The attachment member 4 is attached to the erection frame 18 (structure) by a magnet 43. For this reason, the attachment / detachment of the presser 3 with respect to the installation frame 18 becomes easier. Further, even when the print medium 2 is disposed on the transport surface 1a, it is easy to easily change the print medium 2 to a desired position.

  Such a presser 3 may be used by being replaced with a plurality of different types of printing apparatuses, or may be provided as a printing apparatus including the presser 3 provided in each printing apparatus.

  In the above embodiment, an example in which the printing medium 2 is set using one pressing tool 3 has been described. However, a plurality of pressing tools 3 may be used as appropriate according to the width of the printing medium 2 and the like.

  In the embodiment described above, the tension coil spring 7 is used as the biasing member. However, the present invention is not limited to this, and the printing medium 2 is held by the mounting member 4 and the swinging member 5 and held. The urging member may be any urging member capable of urging the transfer surface 1a toward the conveying surface 1a and maintaining the holding state and the released state by the urging force.

In the above-described embodiment, the example in which the swinging member 5 is provided with the swinging extension part 5c as the operation part has been described. However, the swinging side wall part 5a of the swinging member 5 can be picked and swung. The swinging side wall 5a may be used as an operating portion, and the swinging upward extending portion 5c may not be provided.
The print medium 2 arranged in the printing apparatus 1 may be a roll paper or a cut sheet, or a medium other than paper.

  Further, the presser 3 according to the present invention is not limited to the ink jet printing apparatus 1 but can be used when a medium is arranged in a printing apparatus of another system and a recording apparatus such as a plotter.

  The above embodiment is for facilitating the understanding of the present invention, and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Printing apparatus, 1a Conveying surface, 2 Print media, 3 Presser, 4 Mounting member,
5 oscillating member, 5c oscillating upper extending part, 6 oscillating shaft, 7 tension coil spring,
8 holding members, 11 rail units, 18 installation frames, 43 magnets,
L A straight line connecting the locking points at which both ends of the tension coil spring are locked,

Claims (5)

A pressing tool for temporarily pressing a print medium on a conveyance surface,
An operation unit capable of changing a holding state in which the print medium is temporarily pressed and a released state in which the holding state is released;
A presser, which is detachably attached to a structure provided above the transport surface. An attachment member detachably attached to the structure;
A swinging member supported by the mounting member via a swinging shaft and swingable between a temporary pressing position located in the holding state and a release position located in the release state by the operation unit;
A biasing member interposed between the swinging member and the mounting member and biasing a force to maintain either the holding state or the released state;
The swing member includes a contact portion that is separated from the print medium by swinging to one side in the release state, and is in contact with the print medium by swinging to the other in the holding state. The pressing tool according to claim 1. The biasing member is a tension spring whose one end is locked to the mounting member and the other end is locked to the swinging member,
A straight line connecting two points where both ends of the urging member are locked when viewed from the axial direction of the oscillating shaft is located closer to the pressing position than the oscillating shaft in the holding state, and the release The presser according to claim 2, wherein the pressing tool is located closer to the release position than the swing shaft in a state.   The pressing tool according to claim 1, wherein the attachment member is attached to the structure by a magnet. The presser according to any one of claims 1 to 4, comprising:
A printing apparatus that prints on the print medium that is disposed while being pressed by the pressing tool.

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