JP3765240B2 - Printer device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a paper feed mechanism that pushes up a recording paper placed on a rocking plate, pushes it against a paper feed roller by swinging the rocking plate, separates it by rotation of the paper feed roller, and sends it to a conveyance path A printer apparatus comprising:
[0002]
[Prior art]
A printer device that forms a desired image on the surface of a recording sheet transported along a transport path, such as an inkjet printer, by the operation of a recording head that moves in a direction substantially orthogonal to the transport path is provided at the start of the transport path. A paper feed mechanism is provided for separating the recording paper set in the provided paper feed unit and feeding it to the transport path.
[0003]
FIG. 7 is a side sectional view schematically showing an internal configuration of a printer apparatus provided with a general paper feeding mechanism. An ink head 1 as a recording head is a guide rod 10 horizontally installed inside a main body housing H. The ink droplets are ejected downward while moving in the direction perpendicular to the paper surface together with the carriage 11. A platen 12 is opposed to the lower side of the movement path of the ink head 1, and a conveyance path including a paper feed roller 2 and a paper discharge roller 3 is extended on both sides of the platen 12. .
[0004]
7 shows a paper feed gear 2a attached to one end of the rotation shaft of the paper feed roller 2. The paper feed gear 2a is an output end of a motor M fixed to the bottom of the main body housing H. Is engaged with the motor gear 2b via a drive gear 2c and an intermediate gear 2d. Similarly, the paper discharge roller 3 is meshed with the output end of the motor M via a gear train (not shown), and the paper feed roller 2 and the paper discharge roller 3 are rotated around their respective axes by transmission from the motor M. It is designed to be rotated.
[0005]
Below the paper feed roller 2, a swing plate 4 swinging around a pivot 40 horizontally mounted in the main body housing H is disposed, and above the swing plate 4, a plurality of recording sheets are provided. P, P... Are loaded and held.
[0006]
FIG. 8 is an explanatory diagram of the swing mechanism of the swing plate 4. This rocking mechanism is provided with a push-up link 4a that is bent into an L shape and disposed on one side of the rocking plate 4 in the width direction. The push-up link 4a has a bent portion pivotally supported on the bottom surface of the main body housing H by a pivot pin 4b, and a short side tip extending along the bottom surface is inserted into the lower portion of the swing plate 4 so as to rise substantially vertically. The upper end of the side is attached so as to face one side of the moving path of the ink head 1 that moves along the guide rod 10.
[0007]
The end of the movement path where the upper end of the push-up link 4a is located is in a standby area where the ink head 1 moving together with the carriage 11 is set to be located before the start of the image forming operation, and the push-up link 4a It is pressed by a part of the carriage 11 that has moved to the standby area, and swings about the pivot pin 4b as a pivot as shown by a two-dot chain line in the figure. By this swinging, the short side of the push-up link 4a is tilted so as to raise the engaging end of the swinging plate 4, and the swinging plate 4 swings around the pivot 40 and is placed on the upper part. The recorded recording sheets P, P... Are pushed up and pressed against the upper sheet feeding roller 2 as shown in FIG.
[0008]
The paper feed roller 2 is rotated prior to the image forming operation by transmission from the motor M, and the uppermost recording paper P pressed by the swing of the swing plate 4 is in contact with the peripheral surface of the paper feed roller 2. Is fed out by friction between the sheet feed roller 2, rolled upward along the peripheral surface of the sheet feed roller 2, and fed onto the platen 12. The ink head 1 starts moving from the standby area in synchronization with the feeding, and a desired image is formed on the recording paper P on the platen 12 by the ink particles ejected downward during this movement. The The recording paper P on which image formation has been completed is sent out through the paper discharge port 13 opened in the main body housing H by the rotation of the paper discharge roller 3, and the outer surface of the main body housing H is aligned with the opening position of the paper discharge port 13. The paper is discharged onto a paper discharge tray 14 attached to.
[0009]
When the recording paper P, P... Is pressed against the paper feed roller 2, the push-up link 4a returns to the original position as shown by the solid line in FIG. 4 is released by lowering. In addition, a buffer means such as a spring is interposed between the lower surface of the swing plate 4 and the bottom surface of the main body housing H, so that the lowering can be performed slowly.
[0010]
[Problems to be solved by the invention]
However, in the printer apparatus configured as described above, since the recording paper P, P,... Pushed up by the swing plate 4 is pressed against the peripheral surface of the paper feeding roller 2 in the rotating state, this pressing state is stable. If the pressing is not uniform in the width direction, a phenomenon that the recording paper P is sent out in a posture inclined with respect to the conveyance path (hereinafter referred to as oblique feeding) occurs, and image formation on the platen 12 is not performed. If there is a problem that the feeding is not performed properly, and the degree of skew feeding is large, the guide means provided in the middle of the conveyance path and the recording paper P may come into contact with each other, leading to a paper jam.
[0011]
Even when the recording sheet P is pressed uniformly in the width direction, if the pressing force is excessive, another recording sheet P is placed on the back surface of the recording sheet P that contacts the paper feed roller 2. There is a possibility that a phenomenon of overlapping feeding (hereinafter referred to as “multiple feeding”) occurs and a paper jam occurs in the middle of the conveyance path.
[0012]
The present invention has been made in view of such circumstances, and includes a paper feed mechanism that feeds a recording paper placed on a rocking plate against a paper feed roller by the rocking of the rocking plate and sends it to a conveyance path. By using the movement of the recording head in the standby area, the recording paper can be stably pressed against the paper feed roller to prevent the occurrence of feeding abnormalities including skew feeding and double feeding. It is an object of the present invention to provide a printer device that can be used.
[0013]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a printer apparatus comprising: a swing plate that lifts and lowers a recording paper placed on the upper portion of the recording paper; and a surface of the recording paper that is pushed up by the swing plate. and a paper feed roller for feeding the recording sheet to the conveying path, to move along a travel path intersecting said conveying passage, in the printing apparatus and a recording head for forming an image on a recording sheet conveying path, the drive A drive gear that is rotated by transmission from the motor, a swing gear that is mounted on the swing shaft of the swing plate, a paper feed gear that is mounted on the rotary shaft of the paper feed roller, and one side of the movement path. and depending on the movement of the recording head in the standby area, by the action of the pressing projection provided on said recording head is displaced while keeping the engagement between the swing gear and a paper feed gear, selectively to the drive gear a driven gear meshing, the oscillating plate Characterized in that it comprises a switching means for switching between rotation motion and the paper feed roller selectively.
[0014]
In the present invention, the machine and the rocking of the rocking plate for the raising and lowering of the recording paper, and a rotation of the feed roller for feeding the recording paper, the movement of the recording head in the standby region before image forming operation Switching means that responds automatically , specifically, a recording head between a driving gear that is rotated by transmission from a driving motor and a rocking gear for driving a rocking plate and a paper feeding gear for driving a paper feeding roller. Operation of a mechanical switching means having a simple structure including a driven gear that is displaced while maintaining the meshing state with the swinging gear and the paper feeding gear by the mechanical action of the pressing protrusion provided on the gear, and changes the meshing with the driving gear by selectively switched so reliably performed, pressing the recording paper pushed up by the swing of the swing plate on the surface of the paper feed roller in the non-rotating, rotate the sheet feeding roller after obtaining the stable pressed state Occurrence of feeding abnormalities such as oblique feeding, double feeding, etc. To prevent.
[0015]
According to a second aspect of the present invention, there is provided a printer apparatus for detecting a feeding of a recording sheet to the conveyance path, and for separating the recording head from the standby area in response to the detection of the sheet feeding sensor to perform a recording operation. And a switching means according to the first aspect of the present invention, wherein the swinging plate swings in the downward direction in accordance with the separation from the standby area.
[0016]
In this invention, the feeding of the recording paper to the conveyance path due to the rotation of the paper feed roller is detected by the paper feed sensor, and the swinging plate is lowered in response to the release of the recording head from the standby area in response to this detection. It is swung to release the pressing of the recording paper, thereby preventing the subsequent recording paper from being double fed.
[0017]
According to a third aspect of the present invention, there is provided a printer apparatus characterized in that the swinging of the swinging plate and the rotation of the paper feed roller are performed by transmission from a common drive motor.
[0018]
In the present invention, the drive motor for the swing plate and the paper feed roller is shared, thereby simplifying the structure of the transmission system and making the device compact.
[0021]
A printer device according to a fourth aspect of the invention is characterized in that the drive gear according to the first to third aspects of the invention is configured to always keep a rotating state during operation of the drive motor.
[0022]
In the present invention, a drive gear that is always rotated by transmission from the drive motor is provided, and by selectively engaging with the drive gear, the swing plate is swung and the paper feed roller is rotated, thereby changing the load. The unnecessary rotation and stop of the driving motor are unnecessary.
[0023]
Further, according to a fifth aspect of the present invention, there is provided the printer device according to the first to fourth aspects, wherein the driven gear is displaced in the axial length direction by the action of the pressing protrusion, and the displacement cylinder is free to move in the axial length direction. A pair of ring gears that are fitted and held and mesh with the swing gear and the paper feed gear, respectively.
[0024]
In this invention, a pair of ring gears meshed with the swing gear and the paper feed gear are loosely fitted and held outside the non-rotating displacement cylinder to constitute a driven gear, and the acting force from the pressing projection of the recording head is displaced. By adding to the cylinder, the respective ring gears are collectively displaced, and the switching operation according to the movement of the recording head is surely performed.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof. 1 and 2 are side sectional views schematically showing an internal configuration of a printer apparatus according to the present invention. Note that the printer apparatus shown in the drawings is configured as an ink jet printer including an ink head that ejects ink particles having a very small diameter as a recording head. However, the present invention moves in a direction substantially perpendicular to the conveyance path of the recording paper. However, it goes without saying that the present invention can be applied to all printer apparatuses having a recording head for performing an image forming operation.
[0026]
In the figure, reference numeral 1 denotes an ink head as a recording head. The ink head 1 is supported by a guide rod 10 that is horizontally mounted inside the main body housing H via a carriage 11. The ink head 1 moves along the guide rod 10 together with the carriage 11, and drops ink particles downward. It is supposed to spray.
[0027]
A platen 12 is disposed below the movement path of the ink head 1, and a sheet feeding roller 2 that rotates about an axis parallel to the movement path of the ink head 1 is disposed on both sides of the platen 12. And a paper discharge roller 3. A paper discharge port 13 is formed in the peripheral wall of the main body housing H on the paper discharge roller 3 side, and a paper discharge tray 14 is attached to the outside of the opening of the paper discharge port 13. 12, a paper discharge roller 3 and a paper discharge port 13 extend in a direction substantially perpendicular to the movement path of the ink head 1 to form a conveyance path to the paper discharge tray 14.
[0028]
Below the sheet feed roller 2, a swing plate 4 swinging around a pivot 40 laid horizontally inside the main body housing H is disposed, and a plurality of recording sheets are placed above the swing plate 4. Sheets P, P... Are stacked and held. These recording sheets P, P... Are raised and lowered by the swing of the swing plate 4. FIG. 1 shows a state when the recording paper P, P... On the swing plate 4 is moved downward, and FIG. The recording paper P, P,... Pushed up by the movement is pressed against the peripheral surface of the paper feed roller 2 facing upward as shown in FIG.
[0029]
The above configuration is the same as that of the printer apparatus shown in FIG. 7, and the recording paper P, P... Only the upper sheet is fed out, turned upward along the peripheral surface of the paper feed roller 2, and fed into the transport path.
[0030]
This feeding is detected by a paper feed sensor S arranged on the exit side of the paper feed roller 2, and in response to this detection, the ink head 1 starts from a standby area set on one side of the movement path, The movement is started along the guide rod 10 and the operation of ejecting ink particles onto the recording paper P fed onto the platen 12 facing downward is performed. The recording paper P on which image formation has been completed by the operation of the ink head 1 is further conveyed by the rotation of the paper discharge roller 3 and is sent out of the main body housing H through the paper discharge port 13 to be discharged to the paper discharge tray. 14 is discharged on top.
[0031]
The printer device according to the present invention is characterized by the structure of a transmission system for rotating the paper feed roller 2 and swinging the swing plate 4. 1 and 2 show a paper feed gear 21 that is coaxially fitted to one end of the rotation shaft 20 of the paper feed roller 2. The paper feed gear 21 is meshed with a motor gear 22 at the output end of the motor M fixed to the bottom of the main body housing H via a drive gear 5 and a driven gear 6 as described later. The motor M is rotated about the axis of the rotary shaft 20 by the rotational force of the motor M transmitted to the paper feed gear 21 through a gear train including the motor gear 22, the drive gear 5, and the driven gear 6. Similarly, the paper discharge roller 3 is connected to the output end of the motor M via a gear train (not shown), and is driven to rotate by transmission from the motor M.
[0032]
On one side of the swing plate 4, a swing gear 41 and a swing link 7 for raising and lowering the swing plate 4 are arranged. The oscillating gear 41 is rotatably supported by an oscillating shaft 42 which is parallel to the rotating shaft 20 of the paper feed gear 21 and is meshed with the driven gear 6 as will be described later. The motor 5 is rotationally driven by the rotational force of the motor M transmitted through a gear train including the gear 5 and the driven gear 6.
[0033]
The swing link 7 has an L-shaped bent shape, and the bent portion is pivotally supported on the bottom surface of the main body housing H by a pivot pin 70 and has a lateral side extending along the bottom surface. The midway part is connected to a part of the swing plate 4, and the tip of the vertical side of the swing link 7 rising upward from the bottom surface is connected to the side surface of the swing gear 41 via the connection link 71. ing.
[0034]
With the above configuration, the swing link 7 is pushed and pulled through the connecting link 71 according to the rotation of the swing gear 41, and swings about the pivot pin 70 as a pivot. The plate 4 is raised and lowered via a connecting portion with the lateral side of the swing link 7 and swings around the pivot 40. The plurality of recording sheets P, P,... Placed on the upper part of the swinging plate 4 are pushed up by the upward movement of the swinging plate 4 and pressed against the peripheral surface of the paper feed roller 2 facing the upper part as described above. It is done.
[0035]
As described above, in the printer device according to the present invention, the rotation of the paper feed roller 2 and the swing of the swing plate 4 are combined with the drive gear 5 and the rotational force of the motor M as a common drive source. The transmission is realized through transmission systems including the driven gear 6, and this transmission switches the meshing state of the drive gear 5 and the driven gear 6 according to the movement of the ink head 1. Is performed as follows.
[0036]
3 and 4 are front views showing the meshing state of the paper feeding gear 21 and the swinging gear 41 and the driven gear 6 together with the movement path of the ink head 1. As shown in the figure, the driven gear 6 includes a displacement cylinder 61 slidably supported in a shaft length direction on a support shaft 60 parallel to the rotation shaft 20 of the paper feed roller 2, and the displacement cylinder 61 in the axial direction. A pair of ring gears 62 and 63 which are externally fitted and held so as to be immovable are provided. One ring gear 62 is meshed with the paper feed gear 21, and the other ring gear 63 is meshed with the swing gear 41. .
[0037]
At one end of the displacement cylinder 61, a pressing piece 64 projects outward in the radial direction, and the movement path of the ink head 1 moves along with the carriage 11 along the guide rod 10 parallel to the rotation shaft 20. The carriage 11 is provided with a pressing projection 15 that can contact the pressing piece 64 at a portion facing the driven gear 6. The driven gear 6 configured in this way is opposed to the carriage 11 (right side in the figure) by an urging spring 65 interposed between the displacement cylinder 61 and an appropriate fixing portion of the main body housing H. It is tensioned toward
[0038]
In the movement path of the ink head 1, the above-described standby area is set on the side where the driven gear 6 is disposed (left side in the drawing). FIG. 3 shows a state during the image forming operation in which the ink head 1 is separated from the standby area, and FIG. 4 shows a state before the image forming operation in which the ink head 1 is in the standby area.
[0039]
In FIG. 4, the driven gear 6 is pressed via the pressing piece 64 by the pressing protrusion 15 of the carriage 11 in the standby area, and is displaced to the left against the biasing force of the biasing spring 65. On the other hand, in FIG. 3, the driven gear 6 is pulled by the spring force of the urging spring 65 and is displaced to the right in the figure because the pressing by the carriage 11 that is separated from the standby area is released. The displacement of the driven gear 6 during this period is performed while maintaining the meshing with the paper feeding gear 21 and the swinging gear 41 as shown in the figure, and the meshing state with the drive gear 5 is switched on the other side. It is done.
[0040]
5 and 6 are explanatory diagrams of the switching operation in the printer apparatus according to the present invention, and show the change in the meshing state with the drive gear 5 due to the displacement of the driven gear 6. As shown in this figure, the drive gear 5 is constructed by coaxially fitting a feed roller drive gear 51 and a swing plate drive gear 52 to a rotating shaft 50 that is substantially parallel to the support shaft 60 of the driven gear 6. Has been.
[0041]
A wide tooth portion 53 is formed on the outer periphery of the paper feed roller drive gear 51, and the tooth portion 53 is meshed with the motor gear 22 at the output end of the motor M on the non-opposing side with respect to the driven gear 6. Yes, the drive gear 5 is always driven to rotate by transmission from the motor gear 22. A pair of narrow tooth portions 54 and 55 are formed on the outer periphery of the swing plate driving gear 52 at positions separated from each other in the axial direction.
[0042]
FIG. 5A shows the state shown in FIG. 4, that is, the driven gear 6 is displaced to the leftmost side. At this time, the ring gear 63 of the driven gear 6 is engaged with the tooth portion 55 on one side of the swing plate driving gear 52. The ring gear 63 is meshed with the swing gear 41 on the non-opposing side with respect to the drive gear 5, and when the state shown in FIG. Then, the vibration is transmitted to the rocking gear 41 through the tooth portion 55 and the ring gear 63, the rocking gear 41 is rotated, and the rocking plate 4 is rocked by the action of the rocking link 7.
[0043]
This operation is performed so that the rocking gear 41 is rotated halfway before the image forming operation, and the recording sheets P, P... On the rocking plate 4 are pushed up and pressed against the sheet feeding roller 2. At this time, the other ring gear 62 of the driven gear 6 meshed with the paper feed gear 21 is not meshed with the wide tooth portion 53 of the drive gear 5, and the pressing of the recording paper P, P. This is performed for the paper feed roller 2 in the above.
[0044]
Next, the driven gear 6 is displaced to the right by a predetermined amount as shown in FIG. At this time, the ring gear 63 of the driven gear 6 is disengaged from the narrow tooth portion 55 of the swing plate driving gear 52, and the ring gear 62 of the driven gear 6 meshes with the tooth portion 53 on the outer periphery of the paper feed roller driving gear 51. The ring gear 62 is meshed with the paper feed gear 21 on the non-opposing side with respect to the drive gear 5, and when the state shown in FIG. 5B is reached, the rotation of the drive gear 5 by the transmission from the motor M is The paper feed gear 21 is transmitted to the paper feed gear 21 through the tooth portion 53 and the ring gear 62, and the paper feed roller 2 starts rotating together with the paper feed gear 21. At this time, the oscillating plate 4 is kept in the upward movement position by stopping the oscillating gear 41, and the rotation of the paper feed roller 2 is performed under the pressing of the recording paper P, P... The recording paper P is separated and fed out by friction with the peripheral surface of the paper feed roller 2.
[0045]
With the above operation, in the printer device according to the present invention, when the paper feed roller 2 is in the non-rotating state, the swing plate 4 swings upward, and the recording paper P, P. The paper roller 2 is pressed against the peripheral surface of the paper roller 2, and after the pressing is completed, the paper feed roller 2 starts to rotate for feeding the recording paper P, and the feed is always performed under stable pressing. It is possible to effectively prevent the occurrence of feeding abnormalities such as double feeding.
[0046]
Further, the switching between the swing of the swing plate 4 and the rotation of the paper feed roller 2 is made by the displacement of the driven gear 6, and this displacement occurs in response to the movement of the ink head 1 within the standby area. A reliable switching operation can be performed with a simple configuration.
[0047]
Next, the driven gear 6 is displaced rightward through the state shown in FIG. 6A until it becomes the state shown in FIG. 6B. This displacement is caused by the ink head 1 being removed from the standby area for the image forming operation in response to the detection of the feeding of the recording paper P into the transport path by the paper feed sensor S. FIG. 6B shows the state shown in FIG. 3, that is, the state during the image forming operation.
[0048]
In the state of FIG. 6A before reaching FIG. 6B, the ring gear 63 of the driven gear 6 meshes with the other narrow tooth portion 54 of the swing plate driving gear 52, and the ring gear 62 is The meshing state with the wide tooth portion 53 of the paper feed roller drive gear 51 is maintained. At this time, the rotation of the drive gear 5 due to the transmission from the motor M is transmitted to the swinging gear 41 through the tooth portion 54 and the ring gear 63, and at the same time, the paper feed gear through the tooth portion 53 and the ring gear 62. 21, the swing gear 41 rotates, and the paper feed gear 21 continues to rotate.
[0049]
The rotation of the swing gear 41 is performed to lower the swing plate 4 by the action of the swing link 7 and release the pressing of the recording sheets P, P. That is, pressing of the remaining recording sheets P, P... Is released in response to detection of sheet feeding to the conveyance path, and the recording sheet by the sheet feeding roller 2 that continues to rotate together with the sheet feeding gear 21. Double feeding of P can be reliably prevented.
[0050]
The state shown in FIG. 6A is continued only while the swinging gear 41 is half-rotated, and shifts to the state shown in FIG. In this state, the ring gear 63 of the driven gear 6 is disengaged from the tooth portion 54, but the other ring gear 62 maintains the meshed state with the corresponding wide tooth portion 53. Accordingly, the rotation of the paper feed roller 2 is continued even after the swing plate 4 is lowered, and the recording paper P sent out to the transport path is given a predetermined feed by the continuous rotation of the paper feed roller 2, and this feed, A desired image is formed on the recording paper P by the ejection of ink particles from the ink head 1 that moves along the movement path.
[0051]
The ink head 1 that has completed such image formation returns to the standby area in preparation for the next feeding of the recording paper P, and the switching operation described above is repeated by the movement of the ink head 1 within this standby area.
[0052]
【The invention's effect】
As described above in detail, in the printer apparatus according to the first aspect of the present invention, the swinging of the swinging plate for raising and lowering the recording paper and the rotation of the paper feed roller for feeding the recording paper are performed on one side of the moving path. Is switched selectively by the operation of the switching means that mechanically responds to the movement of the recording head within the standby area, and the recording sheet pushed up by the swinging plate is reliably pressed against the surface of the non-rotating sheet feeding roller. it is so arranged to start rotation of the paper feed roller in a state, skew, the occurrence of feeding abnormalities double feed or the like can be prevented securely, can be performed stably high-quality image formation In addition, the switching means described above is provided between the drive gear that rotates by transmission from the drive motor, the swing gear for driving the swing plate, and the paper feed gear for driving the paper feed roller. Engagement, press provided on the recording head Since constructed by arranging the driven gear for switching by the displacement in the axial direction due to the action of force, it is possible to perform a reliable switching with a simple configuration.
[0053]
In the printer device according to the second aspect of the present invention, when the recording paper is sent out to the conveyance path and the recording head is released from the standby area in response to the detection, the swing plate is lowered in the downward direction in response to the separation. Since the pressing to the paper feed roller is released by swinging, it is possible to reliably prevent the subsequent recording paper from being double-fed.
[0054]
In the printer device according to the third aspect of the invention, the swinging plate and the feed roller are rotated by transmission from a common drive motor. Can be made compact.
[0056]
In the printer device according to the fourth aspect of the invention, since the drive gear while the drive motor is rotating always maintains the rotation state, it is not necessary to repeat the rotation and stop of the drive motor with load fluctuation, and the durability is improved.
[0057]
Further, in the printer device according to the fifth aspect of the present invention, since the driven gear is configured by loosely holding and holding the pair of ring gears on the displacement cylinder that is displaced in the axial direction, the displacement cylinder is pressed by moving the recording head. The present invention has an excellent effect that the driven gear for switching can be reliably moved.
[Brief description of the drawings]
FIG. 1 is a side sectional view schematically showing an internal configuration of a printer apparatus according to the present invention.
FIG. 2 is a side sectional view schematically showing the internal configuration of the printer apparatus according to the present invention.
FIG. 3 is a front view showing a meshing state of a paper feed gear, a swinging gear, and a driven gear together with a movement path of an ink head.
FIG. 4 is a front view showing a meshing state of a paper feed gear, a swinging gear, and a driven gear together with a movement path of an ink head.
FIG. 5 is an explanatory diagram of a switching operation in the printer device according to the present invention.
FIG. 6 is an explanatory diagram of a switching operation in the printer device according to the present invention.
FIG. 7 is a side cross-sectional view schematically showing an internal configuration of a printer apparatus provided with a general paper feeding mechanism.
8 is an explanatory diagram of a swing mechanism of a swing plate in the printer apparatus shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Ink head 2 Paper feed roller 3 Separating means 4 Oscillating plate 5 Drive gear 6 Driven gear 7 Oscillating link
10 guide bar
11 Carriage
15 Pressing protrusion
21 Feeding gear
41 Swing gear
64 Pressing piece M Motor P Recording paper S Paper feed sensor

Claims (5)

A swinging plate that raises and lowers the recording paper placed on the top, and a paper feed that rotates by rolling on the surface of the recording paper pushed up by the swinging plate and feeds the recording paper to the transport path In a printer apparatus comprising a roller and a recording head that moves along a moving path intersecting the conveying path and forms an image on a recording sheet on the conveying path.
A drive gear that is rotated by transmission from the drive motor;
A swing gear attached to the swing shaft of the swing plate and a paper feed gear attached to the rotary shaft of the paper feed roller;
Said moving said depending on the movement of the recording head in the standby area, which is set on one side of the path, the displacement while maintaining engagement between the swing gear and a paper feed gear by the action of the pressing projection provided on said recording head And a driven gear that selectively meshes with the drive gear,
A printer device comprising switching means for selectively switching between the swing of the swing plate and the rotation of the paper feed roller.   A paper feed sensor that detects the delivery of the recording paper to the transport path, and a control unit that causes the recording head to leave the standby area and perform a recording operation in response to the detection of the paper feed sensor; 2. The printer apparatus according to claim 1, wherein the means is configured to swing the swinging plate in a downward direction in accordance with the separation from the standby area.   3. The printer apparatus according to claim 1, wherein the swinging of the swinging plate and the rotation of the paper feed roller are performed by transmission from a common drive motor. The printer device according to claim 1 , wherein the drive gear is configured to always maintain a rotating state during operation of the drive motor . The driven gear is loosely fitted and held in a displacement cylinder that is displaced in the axial length direction by the action of the pressing protrusion, and the displacement cylinder is not movable in the axial length direction, and meshes with the swing gear and the paper feed gear, respectively. The printer device according to claim 1, further comprising a pair of ring gears.

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