JP3328117B2 - Serial printer and paper supply method for serial printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a serial feeder for driving an automatic paper feeder for feeding paper and a paper feeder for feeding the paper delivered from the automatic feeder by a common paper feed motor. The present invention relates to a paper supply method for a printer and a serial printer.

[0002]

2. Description of the Related Art Conventionally, as a serial printer, an automatic paper feeder for supplying paper and a paper transporter for transporting paper delivered from the automatic paper feeder are driven by a common paper transport motor. There is something that I did. One example will be described with reference to FIG. First, side frame 1
00 is provided with a paper transport motor 101 that is rotatable forward and backward. Reference numeral 102 denotes a sheet conveying device. The sheet conveying device 102 has a plurality of sheet conveying rollers 10
4 and the paper transport gear 105 are fixedly fitted to each other. 106 is an automatic paper feeder (not shown)
This is a cam gear that starts up. A power transmission control mechanism 10 that transmits rotation of the paper transport motor 101 in one direction to the paper transport gear 105 of the paper transport device 102 and transmits rotation of the paper transport motor 101 in the other direction to the cam gear 106.
7 are provided.

The power transmission control mechanism 107 includes a gear 109 and a clutch gear 110 rotatably held on a stud 108 of the side frame 100, and a toggle link 112 rotatably held on a stud 111 of the side frame 100. , a gear 11 that one side to the toggle link 112 is pressed against rotatably fitted to the stud 11 1
3, an idler gear 114 rotatably held at a position distant from the rotation center of the toggle link 112, and a gear 116 rotatably held by a stud 115 of the side frame 100.

When the paper transport motor 101 is driven, its rotational force is transmitted to the paper transport gear 105 via the gear 109, so that the paper transport device 1
The rotation shaft 103 of 02 rotates. The clutch gear 11
Reference numeral 0 denotes a built-in one-way clutch 117, which transmits only rotation in one direction of the paper transport motor 101 to the idler gear 114 via the gear 113. At this time, since the toggle link 112 rotates around the stud 111 by the frictional force received from the rotating gear 113, the idler gear 114 meshes with the gear 116, and the cam gear 106 constantly meshed with the gear 116 rotates.

[0005]

As described above, in order to drive the cam gear 106 of the automatic paper feeder by using the paper transport motor 101 that drives the paper transport device 102,
Expensive one-way clutch 1 for power transmission control mechanism 107
17 is required, so that the cost increases. Further, the one-way clutch 117 slips when lubricating oil enters, and when the lubricating oil runs short, the rotating part is locked, so that seizure occurs, and there is a problem of lack of reliability.

[0006]

According to the present invention, there is provided a serial printer, comprising: a paper transport motor for driving a paper transport device; a pressing portion provided on a carriage; and a carriage moved to a predetermined position outside a print area. a dynamic <br/> force transmission control mechanism in conjunction with the movement of the carriage Ru by transmitting rotation of the paper conveying motor to the driving unit of the automatic sheet feeding device by contact with the pressing portion provided, the power transmission The control mechanism is
Direction for transmitting the rotation of the feed motor to the drive of the automatic paper feeder
The paper transport motor is rotatable in a direction that does not transmit
That is driven in a direction that transmits the rotation of the motor to the drive unit
And the position of the pressing portion in the movement locus and the movement locus
Position and the position in the locus of movement of the pressing part.
Having a slider biased in the direction of movement of the carriage.
Disengage with the toggle link by moving parallel to
In the process of engaging the toggle link, rotate the paper transport motor
The toggle link can be turned in a direction that does not transmit to the drive.
In the process of moving the moving body and the slider, the slider is moved
An inclined surface that rotates to a position out of the motion trajectory.
If the carriage is located in the print area, the movable
To transmit the rotation of the paper transport motor to the drive unit.
Position the toggle link at a position where there is no print
With the movement to the predetermined position outside the area, the pressing portion
The movable body moves by pressing the slider,
Release the toggle link, which causes the toggle link to
Is rotated in the direction to transmit the rotation of the
In the process of moving the slider by being pressed by the part, the slider
Rotate to a position where it is not pressed by the pressing part due to the inclined surface, and
This allows the pressing section to pass through the slider, so that the rotation of the paper transport motor can be transmitted to the drive section of the automatic paper feeder regardless of the switching control of the rotation direction of the paper transport motor. Becomes According to the paper supply method of the serial printer of the present invention, when the carriage is moved to a predetermined position outside the printing area, the pressing unit provided on the carriage causes the rotation of the paper conveyance motor to be transmitted to the driving unit of the automatic paper feeder. both the part of the power transmission control mechanism for transmitting in association with the movement of the carriage by moving the pressing to transmit the rotation of the sheet conveying motor to the driving unit of the automatic sheet feeder, the pressing portion
Of a part of the power transmission control mechanism pressed against
In removed from the moving locus of the pressing portion pressing portion power transmission controller
In this case, the contact of the pressing section with a part of the power transmission control mechanism is released while maintaining the state of rotation transmission to the drive section, so that the rotation direction of the paper transport motor is maintained. Irrespective of the switching control, the rotation of the paper transport motor can be transmitted to the drive unit of the automatic paper feeder.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view showing a state in which a part of a side surface 2 of a bottom cover 1 is cut away and a carriage 3 is located at an end of a print area. FIG. 2 shows a state where the carriage 3 is located at an end of a print area. FIG. 3 is a plan view in which a part of FIG. 2 is enlarged, FIG. 4 is a side view showing a state in which a part of the side surface 2 of the bottom cover 1 is cut away, and the carriage 3 is positioned outside a printing area, and FIG. 6 is a plan view showing a state in which the carriage 3 is positioned outside the printing area with a part enlarged, and FIGS. 6 and 7 are exploded perspective views showing a part of the power transmission control mechanism.

[0008] The carriage 3 is not shown the more the ink jet head and an ink tank an ink cartridge is mounted a print head. The carriage 3 is reciprocated along a platen (not shown) by a known driving device including a wire partially fixed to the carriage 3 and a forward / reverse rotatable carriage motor for driving the wire. Driven.

Reference numeral 4 denotes an automatic paper feeder.
A paper feed tray 6 that rotates around a support shaft 5, a paper feed roller (not shown) that feeds the paper stacked on the paper feed tray 6 one by one, and a paper feed tray 6. A rotatable cam shaft 8 provided at both ends with a spring (not shown) for urging the paper feed roller, and projections 7 for pressing both sides of the paper feed tray 6 against the urging force of the spring; A drive gear 9 serving as a drive unit is fixed to one end of the cam shaft 8. When the drive gear 9 is rotated by receiving a rotational force from a paper conveyance motor described later, the cam shaft 8 is rotated to retract the projection 7 from the paper feed tray 6, and
Is rotated by the urging force. Thereby, the paper feed tray 6
The upper sheet is brought into contact with the sheet feeding roller, and the sheet feeding is started by the rotation of the sheet feeding roller. When the cam shaft 8 completes one rotation and stops, the projection 7 separates the paper feed tray 6 from the paper feed roller, but at this time, the leading edge of the fed paper is transferred to the paper transport device 10. Has become.

The paper transport device 10 includes a rotating shaft 11 (FIG. 2,
3, 5, and 6) are formed by fixedly fitting a plurality of paper transport rollers 12. And
As shown in FIG. 6, the rotational force of the paper transport motor 13 is transmitted to the rotation shaft 11 of the paper transport device 10 via the gear 14 and the paper transport gear 15.

The end of the rotating shaft 11 has a stud 1
A boss 19 at the center of a toggle link 18 having a protrusion 6 and a protrusion 17 is rotatably fitted. In addition, the projection 17 is formed with a cylindrical hole 17a that becomes thinner from the tip toward the back. A spline gear 20 is spline-coupled to the tip of the rotating shaft 11 protruding from the boss 19, and a toggle gear 21 constantly meshed with the spline gear 20.
Are rotatably fitted to the studs 16 of the toggle link 18. That is, the rotation of the rotating shaft 11 is sequentially transmitted to the spline gear 20 and the toggle gear 21. The stud 1 is moved so that the toggle link 18 rotates about the rotation shaft 11 following the rotational movement of the toggle gear 21 at this time.
6, a spring 22 for increasing friction between the toggle gear 21 and the toggle link 18 is held. The spring 22 is prevented from falling off the stud 16 by a push nut 23 fixed to the stud 16. Further, the contact gear 24 and the cam gears 25 and 26, in which the toggle gear 21 is selectively meshed by the rotational movement of the toggle link 18, are provided.
Are rotatably held by a frame (not shown) in a state of being always meshed. The driving gear 9 of the cam shaft 8
Is rotated by receiving a rotational force from the cam gear 26. In order to detect the stop position of the cam shaft 8, a detection piece 27 is fixedly provided on a part of the cam shaft 8, and a cam sensor 28 for optically detecting the detection piece 27 is provided.

Further, a part of the bottom cover 1 includes:
A pedestal 29 located outside the one side surface 2 is formed, and a plurality of rails 30 are integrally formed on the pedestal 29 in parallel with the moving direction of the carriage 3. Are slidably held.
As shown in FIG. 1, FIG. 4, and FIG.
The pin 32 and the stud 33 are erected in parallel with the rail 30. The pin 32 protrudes inward from an opening (not shown) formed on the side surface of the bottom cover 1, and its tip is detachably engaged with the cylindrical hole 17 a (see FIGS. 3 and 7) of the toggle link 18. The slider 34 is rotatably held on the stud 33 by being engaged. In addition, pedestal 2
A vertical surface 35 and inclined surfaces 36 and 37 are continuously formed on the side surface of the substrate 9.

Here, the direction in which the carriage 3 moves toward the outside of the printing area is X, the direction perpendicular to the X direction and away from the rotary shaft 11 is Y, and the downward direction parallel to the vertical surface 35. Is Z, the inclined surface 36 is inclined so as to gradually protrude in the Y direction as it goes in the X direction and the Z direction, and the inclined surface 37 is parallel to the rail 30 but gradually in the Y direction as it goes in the Z direction. It is inclined to protrude. The movable body 31 is urged by a spring (not shown) in a direction opposite to the X direction, comes into contact with a stopper (not shown) (for example, a part of the bottom cover 1), and stops at a fixed position. ing. The slider 34 is biased in the direction of arrow A (see FIGS. 1 and 7),
As described above, when the movable body 31 is stopped at the fixed position, one end of the slider 34 abuts on the vertical surface 35. In this state, when the carriage 3 moves out of the printing area, the slider 34 pushed by the carriage 3 moves in the X direction together with the movable body 31, and in the course of this movement, the inclined surfaces 36 and 37.
, And is configured to rotate around the stud 33.

Further, as shown in FIGS. 3 and 5, the carriage 3 has a pressing portion 38 for pressing the slider 34 at its end face.
And an inclined piece 39 which is gradually inclined in a direction away from the rotating shaft 11 as going from the pressing portion 38 toward the center of the printing area. When the carriage 3 is moved to a predetermined position outside the printing area, the rotation of the paper transport motor 13 is synchronized with the movement of the carriage 3 and the driving gear (drive unit) of the automatic paper feeder 4 is driven. The power transmission control mechanism 40 for transmitting the power to the motor 9 includes components such as the slider 34, the movable body 31, the toggle link 18, the spline gear 20, the toggle gear 21, the contact gear 24, and the cam gears 25 and 26.

In such a configuration, as shown in FIGS. 2 and 3, when the carriage 3 is located at the end of the print area, the slider 34 and the movable body 31
It stops at a fixed position because it does not receive the pressing force from. In this state, the pin 32 of the movable body 31 is
The projection 17 engages with a cylindrical hole 17a (see FIG. 7) formed in the projection 17 to prevent the rotation of the toggle link 18 and maintain the toggle gear 21 away from the contact gear 24 as shown in FIG. .

At the time of paper feeding, first, in order to feed the paper from the automatic paper feeding device 4 to the paper feeding device 10, the carriage 3
To the left of the print area. As a result, the pressing portion 38 of the carriage 3 approaches the slider 34 and eventually presses the slider 34. The slider 34 pressed by the pressing portion 38 moves to the left along the rail 30 together with the movable body 31 as shown in FIG. The slider 34 is the pressing portion 3
When the movable body 31 has moved leftward by 6 mm after contacting the pin 8, the movable body 31 moves the pin 32 to the cylindrical hole 17 a of the toggle link 18.
And the toggle link 18 is released. At this time, the lower part of the slider 34 is
In order to reach the position where it comes into contact with the inclined surface 36 from the position where it comes into contact with 5, the slider 34 turns around the stud 33 of the movable body 31 in the direction of arrow B (see FIG. 4) against the urging force. The rotation angle θ at this time is about 10 °. When the slider 34 is further pushed to the left by the pressing portion 38,
The slider 34 moves from a position where the end thereof comes into contact with the inclined surface 36 to a position beyond the inclined surface 37. At this time, the slider 34 is pressed by the inclined surface 37, rotates at an angle of θ or more, and deviates from the locus of the pressing portion 38. The carriage 3 moves further to the left. At this time, when the pressing portion 38 passes through the slider 34, the slider 34 returns in the direction of the arrow A (see FIG. 1) by the urging force and contacts the side surface of the inclined surface 37 (the side opposite to the inclined surface 36). Stand still.

As described above, when the carriage 3 is moved to the left predetermined position outside the printing area, the movable body 31 releases the toggle link 18 so that the paper transport motor 13
Is driven in a desired direction, the rotation is transmitted to the toggle gear 21 as described above, and the friction between the toggle gear 21 and the toggle link 18 causes the toggle link 18 to rotate about the rotation shaft 11 and the toggle gear 21 to contact. The gear meshes with the gear 24. As a result, the rotational force is transmitted to the drive gear 9 of the automatic paper feeder 4 and the paper feed on the paper feed tray 6 starts.

Then, the carriage 3 is moved to the printing area for printing. At this time, the carriage 3 moves the slider 34 by the inclined piece 39 in the direction of arrow B (see FIG. 4).
Therefore, the lower end of the slider 34 retreats from the inclined surface 37 of the bottom cover 1. At this moment, the movable body 31 slides to the printing area side together with the slider 34 by the urging force of the spring as shown in FIG.
The pin 32 engages with the cylindrical hole 17a of the toggle link 18.
Since the cylindrical hole 17a is formed to have a shape that becomes gradually thinner toward the inner side, the toggle link 18 is maintained in a state where the toggle gear 21 is separated from the contact gear 24 when the pin 32 reaches the inner side of the cylindrical hole 17a. I do. That is, the power transmission path from the paper transport motor 13 to the drive gear 9 of the automatic paper feeder 4 is cut off between the toggle gear 21 and the contact gear 24. In this state, when the paper transport motor 13 is driven in a desired direction, the paper transport device 10
Rotates, and the sheet is fed by the sheet transport roller 12.

As described above, when the carriage 3 is moved to a predetermined position outside the print area,
Power transmission control mechanism 4 that transmits the rotation of paper transport motor 13 to drive gear 9 of automatic paper feeder 4 in conjunction with the movement of
Since 0 is provided, the rotation of the paper transport motor 13 can be transmitted to the drive gear 9 of the automatic paper feeder 4 regardless of the switching control of the rotation direction of the paper transport motor 13. This eliminates the need to provide a one-way clutch in the power transmission path from the paper transport motor 13 to the automatic paper feeder 4.

[0020]

According to the present invention, there is provided a paper transport motor for driving a paper transport device, a pressing portion provided on a carriage, and a contact between the pressing portion when the carriage is moved to a predetermined position outside the printing area. Power transmission control for transmitting the rotation of the paper transport motor to the drive unit of the automatic paper feeder in conjunction with the movement of the carriage and releasing the contact with the pressing unit while maintaining the state of rotation transmission to the drive unit. Since the mechanism is provided, the rotation of the paper conveyance motor can be transmitted to the drive unit of the automatic paper feeder regardless of the switching control of the rotation direction of the paper conveyance motor. This eliminates the need to provide a one-way clutch in the power transmission path from the paper transport motor to the automatic paper feeder. Therefore,
It is possible to prevent a decrease in reliability and an increase in cost due to the use of the one-way clutch.

[Brief description of the drawings]

FIG. 1 illustrates one embodiment of the present invention, and is a side view illustrating a state where a part of a side surface of a bottom cover is cut away and a carriage is positioned at an end of a print area.

FIG. 2 is a plan view showing a state where a carriage is located at an end of a print area.

FIG. 3 is an enlarged plan view of a part of FIG. 2;

FIG. 4 is a side view showing a state in which a part of a side surface of a bottom cover is cut away and a carriage is positioned outside a print area.

FIG. 5 is a plan view showing a state where a part of the carriage is positioned outside a print area by enlarging a part.

FIG. 6 is an exploded perspective view showing a part of a power transmission control mechanism.

FIG. 7 is an exploded perspective view showing a part of a power transmission control mechanism.

8 is an exploded perspective view showing a conventional power transmission mechanism.

[Explanation of symbols]

 Reference Signs List 3 carriage 4 automatic paper feeder 9 drive unit 10 paper transport device 13 paper transport motor 38 pressing unit 40 power transmission control mechanism

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B41J 19/00 B41J 13/02 B41J 19/20 B41J 19/78 B41J 23/02

Claims (2)

(57) [Claims] 1. A printing device, comprising: a sheet conveying device that conveys a sheet delivered from an automatic sheet feeding device and moves a carriage on which a print head is mounted in a direction perpendicular to the sheet conveying direction. In the serial printer, a paper transport motor for driving the paper transport device, a pressing portion provided on the carriage, and a contact between the pressing portion when the carriage is moved to a predetermined position outside the printing area. a dynamic force transmission control mechanism Ru is transmitted to the driving unit of the automatic paper feeder rotation of the sheet conveying motor in conjunction with the movement of the carriage is provided by, the power transmission control mechanism of the sheet conveying motor Rotate the drive of the automatic paper feeder
It is rotatable in the direction to transmit to the moving part and the direction to not transmit.
To transmit the rotation of the paper transport motor to the drive unit
A toggle link driven in a direction, and a position in the movement locus of the pressing portion and a position deviating from the movement locus.
Position on the movement locus of the pressing portion.
And a slider biased in the direction of movement of the carriage.
Said toggle link by moving parallel to the direction of movement
Paper in the process of engaging and disengaging with the toggle link.
The direction in which the rotation of the transport motor is not transmitted to the drive unit is
A movable member for rotating a toggle link, and the pressing portion for pressing the slider during the movement of the slider.
And a sloped surface that rotates to a position removed from the movement locus of, when the carriage is positioned in the printing area, said movable member
Is engaged with the toggle link to rotate the paper transport motor.
Move the toggle link to a position where rotation is not transmitted to the drive unit.
Positioning, the carriage moves to a predetermined position outside the printing area
The pressing portion presses the slider.
The movable body moves to release the toggle link, and
This causes the toggle link to rotate the paper transport motor.
A process in which the slider is rotated in a direction in which the rotation is transmitted to the driving unit, and the slider is moved by being pressed by the pressing unit.
The slider is pressed against the pressing portion by the inclined surface.
Pivots to a position where it is not pressed, so that the pressing portion
A serial printer characterized by passing through a slider . 2. A method in which a sheet delivered from an automatic sheet feeder is conveyed by a sheet conveying device, and printing is performed by the print head in a process of moving a carriage on which a print head is mounted in a direction orthogonal to the sheet conveying direction. in serial printer for performing, when moving to a predetermined position of the carriage a print area outside, to transmit the pressing portion provided on the carriage for rotation of the paper conveying motor to the drive unit of the automatic sheet feeder by pressing a portion of the power transmission control mechanism
By moving it, it moves in conjunction with the movement of the carriage.
Both when the transmitted rotation of the sheet conveying motor to the driving unit of the automatic sheet feeder, the power to be pressed into the pressing portion
A part of the transmission control mechanism is moved during the movement of the pressing portion.
Depressed from the dynamic trajectory and the pressing portion of the power transmission control mechanism
A part of the power transmission control mechanism is released while keeping the rotation transmission state to the drive part, thereby releasing the contact of the pressing part with the drive part. Paper supply method.