JPH08198492A - Sheet conveyance device and recorder - Google Patents

Abstract

PURPOSE: To stop unnecessary drive of a carry-out means, make a drive means compact, promote durability of the carry-out means, and prevent jam of sheet by providing a condition in which a feed means is driven in the forward direction of sheet conveyance and the carry-out means is not driven and transmitted. CONSTITUTION: A pick-up roller 9 is formed in semicircular shape, and this knotched face opposes to a pressure plate on which sheet is set. An LF motor 19 is reversely driven in b direction so that a reversing planetary gear 39 meshes with a pick-up gear 24 to rotate a pick-up roller 9. Consequently, uppermost sheet is separated and supplied and knocks against a conveyance roller 6 which is rotated reversely to correct skew movement. Then, when the pick-up gear 24 rotates up to a position where a teeth missing part 24 opposes to the reversing planetary gear 39, the drive and transmission to the pick-up gear 24 is shut off. That is, the pick-up roller 9 stops after it rotates by a predetermined angle. On the other hand, sheet is guided to a recording position by a conveyance roller 6 which rotates forward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device equipped in a printer, a copying machine, or a recording device for a facsimile, and performs transmission of a driving force from a driving means to a feeding means, a conveying means, and a discharging means. The present invention relates to a sheet conveying device.

[0002]

2. Description of the Related Art Conventionally, a recording device installed in a printer, a copying machine, a facsimile, or the like, or a recording device used as an output device of a multifunction machine or a workstation including a computer, a word processor, etc. An image (including characters, symbols, etc.) is recorded on a recording material such as a plastic thin plate (for example, an OHP sheet). This recording device can be classified into an ink jet type, a wire dot type, a heat sensitive type, a thermal transfer type, a laser beam type and the like depending on the recording system of the recording means used.

Among the above-mentioned recording apparatuses, in a serial type recording apparatus which performs main scanning in a direction intersecting the conveying direction (sub-scanning direction) of the recording material, the recording material is set at a predetermined recording position and then the recording material is set. An image (including characters, symbols, etc.) is recorded by a recording unit (recording head) mounted on a carriage that moves (main scanning) along a recording material, and a predetermined amount of paper is fed after recording one line. By performing (sub-scanning) and then repeating the operation of recording (main scanning) the image of the next row, the image is recorded in the desired range of the recording material. On the other hand, in a line type recording apparatus that performs recording only by sub-scanning in which the recording material is fed in the transport direction, the recording material is set at a predetermined recording position, and one line of recording is continuously performed. While feeding a predetermined amount of paper (pitch conveyance), an image is recorded on the entire recording material.

Generally, in a serial type recording apparatus, a step motor is often used as a carriage driving motor for driving a carriage for main scanning the recording head. Also, a step motor is often used as a drive motor for conveying the recording material in a direction perpendicular to the moving direction of the carriage. Further, in order to reduce the number of motors that are drive sources for cost reduction, space saving, etc., there has been developed a drive source capable of executing a plurality of operations.

More specifically, there is a recording apparatus capable of operating the ASF (automatic sheet feeder), the conveying roller, and the sheet discharging roller by using only one step motor which is one driving source. Being developed.

For example, the transport roller and the paper discharge roller, which are drive-transmitted by the gear train in conjunction with the normal rotation and the reverse rotation of the stepping motor, also perform the normal rotation and the reverse rotation. On the other hand, for example, the ASF is driven in the normal rotation by the reverse operation of the stepping motor, the recording sheet is fed, and the inclination of the recording sheet is corrected by abutting against the reverse conveyance roller, and then the forward rotation operation of the stepping motor conveys the recording sheet. The rollers rotate in the forward direction to convey the recording sheet. After that, by rotating the step motor in the normal direction for each printing or for discharging the paper, the transport roller and the discharge roller perform the normal rotation operation to transport and carry out the recording paper.

[0007]

However, in the above-mentioned conventional example, since the paper discharge roller is driven even during the paper feeding operation by the reverse rotation, the driving required for the operation becomes large.
Therefore, the size of the stepping motor for driving is increased, which hinders downsizing of the apparatus and further increases the cost.

Further, since the paper discharge roller is driven even during the paper feeding operation by the reverse rotation, the durability of the paper discharge roller is further required. In addition, a spur is attached to the ink jet type discharge section to prevent ink stains, and the wear of the tip edge of the tooth profile of the spur adversely affects ink stains, so the number of rotations of the discharge roller is reduced. There is a need.

Further, since the paper discharge roller is reversely rotated during the paper feeding operation due to the reverse rotation, when the paper feeding operation for the next page is started from the state where the previously printed page is in the process of discharging, the recording sheet already printed due to the reverse rotation of the paper discharge roller. There was a drawback that the jam occurred. In addition, in order to prevent the occurrence of jams, the ejection operation on the previous page and the paper feeding operation on the next page cannot be performed at the same time, and the paper feeding operation should be performed after a sufficient ejection operation in consideration of variations between machines and environmental variations. There is a problem that the time required for printing as a whole must be increased because it must be started.

Furthermore, if there is not a sufficient drop between the stacking position of the discharged recording sheets and the discharge rollers, there is a problem that the recording sheets are rewound by the reverse rotation of the discharge rollers.

[0011]

According to the present invention, by stopping unnecessary driving of the discharging means, the driving means can be downsized, the durability of the discharging means can be improved, and a sheet which is being carried out or has already been carried out. The purpose of the present invention is to prevent the paper from being sent backward and cause a jam, and to improve the throughput of the device.

The structure of the present invention for achieving the above-mentioned object is a feeding means for feeding a sheet in a predetermined direction, a driving means capable of normal and reverse rotation, and a driving means driven by the driving means. And a conveying unit that operates so as to convey the sheet fed by the feeding unit in a predetermined direction when rotated in the direction, and convey the sheet in a direction opposite to the predetermined direction when the driving unit rotates in the opposite direction. A carrying-out means for carrying out the sheet carried in the predetermined direction by the carrying means, a first transmitting means for transmitting the driving to the feeding means when the driving means rotates in the opposite direction, and the driving means And a second drive transmission unit that transmits the drive to the unloading unit when the drive unit rotates in a direction and does not transmit the drive to the unloading unit when the drive unit rotates in the opposite direction. That.

[0013]

FIG. 1 shows a recording apparatus embodying the present invention. In this embodiment, the present invention is applied to an inkjet recording device. First, the outline of the operation will be described.

A pressure plate 8 is rotatably supported at both ends in the longitudinal direction by the frame 4, and is urged by a pressure applying means toward a pickup roller 9 as a feeding means. The recording medium 13 as a sheet is stacked on this pressure plate. The recording medium 13 is sent out onto the pressure plate by the pickup roller that rotates in response to the paper feed command, and is separated by the separating means into one sheet and conveyed to the recording section. The separated recording medium 13 is conveyed while being sandwiched between a conveying roller 6 serving as a conveying unit whose both ends are supported by the frame 4 and a pinch roller 7 provided on the base 14, and a sheet discharging roller serving as a discharging unit. 15 and spur 16
It is also sandwiched between and and the paper is discharged. A recording unit is between the transport roller 6 and the paper discharge roller 15. In the recording unit, the carriage 2 is slidably supported by the guide shaft 5, and recording is performed while moving in a direction orthogonal to the conveyance direction of the recording medium 13. Here, a recording head cartridge 1 as a recording means is mounted on the carriage 2, and signals and the like are transmitted to the recording head cartridge 1 from a flexible cable 3. The recording head cartridge is integrally configured with a recording head and an ink tank 30 that contains ink, and is detachably attached to the carriage 2.
The ink tank may be a replaceable ink tank that is detachable from the recording head. In addition to being supported by the guide shaft 5, the carriage 2 is also supported by the guide rails 12 whose both ends are fixed to the frame 4, and the two supporting portions eject the ink of the recording head onto the recording medium 13. The distance between the nozzle and the surface of the recording medium 13 is kept substantially constant. The carriage 2 has a carriage driving belt 11 driven by a driving force of a carriage driving motor 10.
And moves along the guide shaft 5 via.

FIG. 2 is a view showing the state of the carriage 2 and the recording head 1 shown in FIG. 1 and the apparatus moved from the standby position.

A cap 17 is provided at a position facing a face surface of a recording head (not shown), and the cap 17 is connected to a cylinder 18. The driving force of the LF motor 19 is transmitted to the LF gear 20 fixed to the transport roller 6, and the pump gear 22 is driven by the switching operation of the trigger gear 21 at the same time as the transport roller 6 is driven. The rotation of the pump gear 22 is performed by the cylinder gear 23.
And a suction operation is performed from the cap 17 by moving a piston (not shown) in the cylinder 18. The driving force of the LF motor 19 is transmitted to the pickup gear 24 via a transmission switching mechanism (not shown), and the pickup roller 9 is driven.

On the other hand, on the opposite end side of the conveying roller 6, as shown in FIG. 1, the driving force of the conveying roller 6 is transmitted to the sheet discharging idle roller 25 which is in pressure contact with the conveying roller 6, and further, the sheet discharging idle roller. The second discharge idle roller 25a that is in pressure contact with 25 and the discharge idle gear 26b that rotates integrally with the second discharge idle roller 25a are transmitted to the discharge gear 27 to drive the discharge roller 15.

FIG. 3 is a sectional view of the apparatus shown in FIGS. 1 and 2, showing a passage of the recording medium 13. A pressure plate spring 28 presses the pressure plate 8 against the pickup roller 9 to the recording medium 13, and a driving force for feeding the recording medium 13 is applied by the rotating pickup roller 9. As a separating means, an elastic bank sheet 29 is arranged at the end of the recording medium 13 stacked on the pressure plate 8 on the feeding direction side. The bank sheet 29 has a lower end fixed to the base 14 and an upper end free. The separation of the recording medium 9 to which the conveying force is applied by the pickup roller 9 is stopped by the leading edge of the bank sheet 29 so that only the uppermost recording medium 13 is transported over the upper edge of the bank sheet 29 and the remaining recording medium 13 is separated. It is performed by being stopped by the bank sheet 29. The separation pad 30 is for separating the recording media 13 when the remaining recording media 13 are two.

The separated recording medium 13 comes into contact with the PE sensor lever 31 which is rotatably supported about the support shaft 31a, and is fed to the conveying roller 6 while being swung from the normal broken line position to the solid line position. Be done. The movement of the PE sensor lever 31 turns the PE sensor 32 on and off,
The presence / absence of the recording medium 13 can be determined. The ON / OFF of the PE sensor 32 is used to detect the leading end position of the recording medium 13, and is used to judge the sequence at the time of feeding. It is also used to detect the trailing edge of the recording medium 13.

The pinch roller 7 is a pinch roller holder 3
3 is rotatably held, and the pinch roller holder 33 is rotatably supported by the base 14 by the support portion 33a. A pinch roller spring 34 is mounted on the opposite side of the support portion 33a with the pinch roller holder 33 sandwiching the pinch roller 7. The pinch roller 7 presses the recording medium 13 against the conveying roller 6 by the urging force of the pinch roller spring.

Recording medium 1 supplied by the conveying roller 6
The printhead 3 is printed by the recording head 1 mounted on the carriage 2 and then sent to the paper discharge unit. The paper discharge unit is composed of two rows of paper discharge rollers 15 and two rows of spurs 16, and the recording medium 13 is spured by the urging force of the paper discharge spring 35 and the discharge rollers 1.
Hold at 5. The recording medium 13 for which recording has been completed is described in 2 above.
It is ejected out of the machine by the paper ejection rollers in the row.

Next, a drive transmission mechanism from the LF motor 19 to the pickup roller 9 and the conveying roller 6 in the above ink jet recording apparatus will be described with reference to FIGS. 4 and 5. In FIGS. 4 and 5, reference numeral 36 denotes a conveyance roller drive double gear that transmits a driving force from the LF motor 19 to the conveyance roller 6. An LF gear 20 is press-fitted and fixed to the shaft of the transport roller 6. The transport roller driving double gear 36 meshes with the output gear 19a of the LF motor 19 and the LF gear 20, respectively. Reference numeral 37 is an AS for transmitting drive to an ASF (automatic feeder) including the pickup roller 9.
The F drive double gear is in mesh with the transport roller drive double gear 36. 38 is a sun gear, and two-stage gears of different sizes are used.
It meshes with the small diameter gear 37a of the drive double gear 37. Reference numeral 39 denotes a reverse planet gear, which meshes with a small-diameter gear of the sun gear 38 and revolves around it. Reference numeral 40 denotes a forward rotation planetary gear, which meshes with the small-diameter gear 37a of the ASF drive double gear 37, and the ASF drive double gear 3
The small diameter gear 37a of No. 7 revolves around the sun gear.

Next, the operation of each gear will be described. In FIG. 4, when the LF motor 19 rotates in the direction of arrow b (reverse rotation drive), the conveyance roller drive double gear 36 and L.
The conveyance roller 6 rotates in the direction opposite to the sheet conveyance direction via the F gear 20. At this time, each gear rotates in the direction of the arrow in FIG. That is, the reverse planetary gear 39 revolves around the sun gear 38 in the direction of the arrow from the position shown by the broken line to the position shown by the solid line, and has the toothless gear 24a provided at the shaft end of the pickup roller 9 and the pickup gear 24. Mesh with each other. As a result, the pickup roller 9 rotates in the direction of the arrow in the figure (the direction in which the sheet 13 stacked on the pressure plate 8 is fed to the LF roller 6).

Further, since the drive of the LF motor 19 is greatly reduced by the time it is transmitted to the reverse rotation planetary gear 39, the reverse rotation is performed so that the predetermined drive for the recovery operation of the recording head 1 is not transmitted to the pickup roller 9. The angle at which the planetary gear 39 revolves can be kept small. At this time, the forward rotation planetary gear 40 revolves around the ASF drive double gear 37 in the direction of the solid line indicated by the arrow from the position of the broken line in the figure, and stops by hitting a stopper (not shown), so that it does not mesh with the pickup gear 24, It does not affect the rotation of the pickup roller 9.

Next, in FIG. 5, when the LF motor 19 rotates in the direction of arrow f (normal rotation drive), the conveyance roller 6 rotates in the sheet conveyance direction via the conveyance roller drive double gear 36 and the LF gear 20. At this time, each gear rotates in the direction of the arrow in FIG. That is, the forward planetary gear 40 is AS
The periphery of the F drive double gear 37 is revolved from the broken line position to the solid line position in the figure, and meshes with the pickup gear 24 provided at the shaft end of the pickup roller 9. As a result, the pickup roller 9 rotates in the direction of the arrow in the figure (the direction in which the sheet 1 stacked on the pressure plate 8 is sent to the conveyance roller 6).

The drive of the LF motor 19 is transmitted to the forward rotation planetary gear 40 without being decelerated so much.
As soon as the motor 19 changes from reverse rotation to forward rotation, the forward planetary gear 40 meshes with the pickup gear 24. At this time, the reverse rotation planetary gear 39 revolves around the sun gear 38 in the direction of the solid line indicated by the arrow from the position of the broken line in the figure, and stops by hitting a stopper (not shown). It does not affect the rotation of 9.

Next, the sheet conveying operation by the drive transmission mechanism will be described with reference to FIG. As shown in FIG. 3, the pickup roller 9 has a half-moon shape,
Waiting with the cutout surface facing the pressure plate. In this state, the sheet 13 is set on the pressure plate 8.

When the LF motor 19 is reversely driven in the direction of the arrow b, the reverse planetary gear 39 described above causes the pickup gear 2 to move.
4, and the pickup roller 9 is rotated in the arrow direction. When the pick-up roller 9 rotates, the uppermost sheet 13 is separated and supplied and strikes the nip of the reversely rotating transport roller 6 to correct the skew. The pickup roller 9 is rotated by an angle sufficient to bring the sheet 13 into contact with the nip of the conveying roller 6, and the rotation angle of the pickup roller 9 is controlled by the toothless portion 24a provided on the pickup gear 24. That is, the missing tooth portion 24
When the pick-up gear 24 rotates to a position where "a" faces the reverse planetary gear 39 in the solid line position in FIG. 4, the drive transmission to the pick-up gear 24 is cut off, and the pick-up roller 9 stops while rotating by a predetermined angle. The leading end of the uppermost sheet 13 comes into contact with the nip of the conveying roller 6 which is rotating in the reverse direction.

When the LF motor 19 is switched from the reverse rotation drive to the normal rotation drive, the sheet 13 hitting the nip of the transport roller 6 is guided to a predetermined recording position by the forward rotation of the transport roller 6. At this time, as described above,
Since the forward rotation planetary gear 40 revolves at a position where the LF motor 19 is not decelerated so much, the pickup roller 9 moves to the L position.
Almost at the same time as the rotation of the F motor 19, the sheet 13 rotates in the feeding direction. Therefore, since the sheet 13 that has abutted against the nip of the transport roller 6 is pushed by the pickup roller 9 from the rear almost at the same time as the rotation of the transport roller 6, the sheet 13 is reliably transported to the recording position of the recording unit by the predetermined amount, and the cue is performed. Done.

According to the above-mentioned structure, the pickup roller 9 moves the sheet 13 regardless of the forward and reverse driving of the LF motor 19.
In the drive transmission mechanism that rotates in the direction of
A reverse planetary gear 3 that acts when the motor 19 is driven in reverse.
9 is rotated at a position greatly decelerated from the LF motor 19, so the revolution angle of the forward rotation planetary gear 40 for preventing the drive of the LF motor for the recovery processing of the recording head 1 from being transmitted to the pickup roller 9 is made small. Can be suppressed.

Further, since the forward rotation planetary gear 40, which acts when the LF motor 19 is driven in the forward direction, is revolved around the position where the deceleration of the LF motor 19 is not so much, it is possible to secure the cue amount of the seat 13.

Next, referring to FIG. 6, a description will be given of the transmission section located on the left side in FIG.

The recording medium 13 supplied by the conveying roller 6 driven by the driving force of the LF motor 19 is printed by the recording head 1 on the base 14, and thereafter, the discharge roller 15 and the spur are arranged in two rows. The sheet 16 is sandwiched by the pressure of the sheet discharge spring 35 and discharged.

Paper discharge idle roller 2 as the third rotating body
As shown in FIG. 7, the rotary shaft portion 25a of No. 5 is provided between the two pairs of paper discharge idle roller rubber portions 25b and is made of a material that can withstand some wear. The shaft 25a is provided with a paper discharge idle spring 41 as a biasing means, one end of which is in contact with the shaft 25a and the other end of which is in contact with the base 14, and the paper discharge idle roller 25 is pressed against the conveying roller 6 as the first rotating body. There is.

Further, the left side of the paper discharge idle roller 25 in FIG.
The rightward position is determined by the protrusion 14a of the base 14 and the paper ejection idle roller flange portion 25c, while between the protrusion 14a of the base 14 and the paper ejection idle roller shaft portion 25c in the upward and downward directions in FIG. There is a gap, and it is movable within the range of the gap.

Returning to FIG. 6, when the transport roller 6 rotates in the transport direction of the recording medium 13, the paper discharge idle roller 25 moves to the right in the figure, and is placed on the second paper discharge idle roller 26a as the second rotating body. Pressure contact. The rotational force in the forward direction of the transport roller 6 rotates the paper discharge idle roller 25 in the direction of the arrow in FIG. 6, and is integrally formed with the second paper discharge idle roller 26a and the second paper discharge idle roller 26a and supported coaxially. Paper discharge idle gear 26b, and a paper discharge transmission gear 42 that meshes with this
Rotate in sequence. The paper discharge transmission gear 42 is meshed with a paper discharge gear 27 that is fixed coaxially with the upstream paper discharge roller 15, and the rotation of the paper discharge transmission gear 42 is performed via the paper discharge gear 27. 15 is transmitted.

The rotation of the upstream paper discharge gear 27 is transmitted to the downstream paper discharge gear 27 via the idler gear 43, and the downstream paper discharge roller 15 rotating in synchronization with this is rotated.

On the other hand, when the transport roller 6 is driven in the counterclockwise direction (reverse rotation), the paper discharge idle roller 25 is set to the position shown in FIG.
Move to the center right. This movement is based on the base 1 shown in FIG.
It is performed until it hits the protrusion of No. 4. By this movement, the paper discharge idle roller 25 and the second paper discharge idle roller 2
The pressure contact of 6a is released, and when the conveying roller 6 is rotated in the reverse direction, the sheet is not transmitted to the discharge roller 15.

Considering the movements of the paper feed mechanism and the paper discharge transmission mechanism during the paper feed operation as described above, the paper discharge roller is provided while the paper is being fed in the reverse operation for the paper feed operation. The paper discharge roller does not rotate, and the paper discharge roller rotates only when the paper feed operation is normally rotated.

In the above embodiment, the carrying roller 6 serves both as the carrying means and the first rotating body, but the first rotating body may be provided separately.

(Other Embodiments) FIGS. 8 and 9 show a second embodiment of the present invention. The difference from the first embodiment is that the pressure contact direction of the paper discharge idle spring 41 is inclined toward the paper discharge idle gear 26, and the component force exerts an effect of pressing the paper discharge idle roller 25 against the second paper discharge idle roller 26a. The driving force transmitted is more stable, and the driving force transmitted to the paper ejection roller 15 can be increased, and the high torque required for conveying envelopes and the like can be transmitted. Becomes In addition, stable drive transmission is possible even when the load of the discharge roller 15 is increased due to durability and the like.

In addition, the paper discharge idle spring 41 and the paper discharge spring 35, which are coil springs, each have a front end portion of about 90 °.
A compression spring bent and bent is used. The paper discharge spring 35 directly presses the shaft of the paper discharge roller 15 and the paper discharge idle spring 41 directly presses the shaft of the paper discharge idle roller 25. Therefore, at the tip of the wire material forming the spring. Shaft 25a
Tended to scrape. However, by using the springs shown in FIGS. 8 and 9, the wire rod tip portion 41a does not abut the shaft portion 25a and the harmful effect of cutting the shaft is eliminated. Therefore, the shaft 25
As a is abraded and the load increases, the transmission of the driving force is reliably prevented and the transmission of the driving force is prevented.

Further, in the paper discharge idle spring 41, the tip of the paper discharge idle spring 41 is located at an appropriate position according to the movement of the paper discharge idle roller 25, so that the transmission can be switched more reliably.

In the embodiment of FIG. 9, the discharge idle spring 14 is arranged so that the component of the urging force of the discharge idle spring 14 is inclined so that the discharge idle roller 25 is pressed against the second discharge idle roller 26a. ing. With such a configuration,
When the transport roller 6 rotates in the forward direction, the rotation is more reliably transmitted to the second paper discharge idle roller 26a.

On the other hand, on the other hand, the urging force of the paper discharge idle spring 14 acts in a direction to prevent the paper discharge idle roller 25 from separating from the second paper discharge idle roller 26a, so that the transport roller 6 rotates in the opposite direction. At this time, the discharge idle roller 25 may not be reliably separated from the second discharge idle roller 26a.

Further, in FIG. 9, when the transport roller 6 rotates in the forward direction (clockwise in FIG. 9), the paper discharge idle roller 25 rotates counterclockwise, and the paper discharge idle roller shaft 2
Due to the counterclockwise rotation of 5a, the discharge idle roller shaft 25a contacts the end face of the discharge idle spring 41 at a position biased to the left side in FIG. 9 (a position biased to the side closer to the second discharge idle roller 26a). To do.

As a result, the end face of the paper discharge idle spring 41 is inclined so that the left end portion becomes lower, that is, the paper discharge idle spring 41 is curved to the left, in the direction of the second paper discharge idle roller 26a. The urging force on
Alternatively, the direction of the urging force is the second paper ejection idler roller 26.
It tilts to the side a, and the separation of the paper discharge idle roller 25 becomes more and more uncertain.

Therefore, as shown in FIG. 8, a bent and raised portion 41b is formed by bending the end portion of the sheet discharge idle spring 14 into a ring shape.
To form. With such a configuration, the paper discharge idler shaft 25a, which rotates counterclockwise when the paper discharge roller 6 rotates in the normal direction, comes into contact with the bent and raised portion 41b to prevent the contact from being biased to the left end. Therefore, the problems described above do not occur.

Furthermore, as shown in FIG.
When the angle θ of 1b with respect to the end surface of the paper discharge idle spring 41 is made acute, the paper discharge idle roller shaft 25a is sandwiched between the end surface of the spring 41 and the wedge-shaped gap formed by the bent and raised portion 41b. It is possible to further regulate the deviation of the shaft 25a from the spring axis.

The angle θ formed by the bent and raised portion 41b and the sheet discharge idle spring is preferably between approximately 45 degrees and approximately 135 degrees.

In the ink jet head used in each of the above-mentioned embodiments, the heating element is provided in the nozzle for ejecting ink, and the thermal energy generated by the heating element forms a bubble in the ink, and the bubble expands. The ink droplets are ejected from the nozzles.

[0052]

As described above, according to the present invention, by stopping unnecessary driving of the carrying-out means, the driving means can be downsized, the durability of the carrying-out means is improved, and the carrying-out means has been carried out or has been carried out. It is possible to prevent the sheet from being fed back and cause a jam, thereby improving the mounting throughput.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a first embodiment of the present invention.

FIG. 3 is a diagram showing a first embodiment of the present invention.

FIG. 4 is a diagram showing a first embodiment of the present invention.

FIG. 5 is a diagram showing a first embodiment of the present invention.

FIG. 6 is a diagram showing a first embodiment of the present invention.

FIG. 7 is a diagram showing a first embodiment of the present invention.

FIG. 8 is a diagram showing a second embodiment of the present invention.

FIG. 9 is a diagram showing a second embodiment of the present invention.

FIG. 10 is a diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 1 Recording Head 2 Carriage 3 Flexible Cable 4 Frame 5 Guide Shaft 6 Conveying Roller 7 Pinch Roller 8 Pressure Plate 9 Pickup Roller 10 Carriage Drive Motor 11 Carriage Drive Belt 12 Guide Rail 13 Recording Medium 14 Base 15 Paper Ejection Roller 16 Spurs 17 Cap 18 Cylinder 19 LF motor 20 LF gear 21 Trigger gear 22 Pump gear 23 Cylinder gear 24 Pickup gear 25 Paper ejection idle roller 26 Paper ejection idle gear 27 Paper ejection gear 28 Pressure plate spring 29 Bank sheet 30 Separation pad 31 PE sensor lever 32 PE sensor 33 Pinch roller holder 34 Pinch roller spring 35 Paper discharge spring 36 Transport roller drive double gear 37 ASF drive double gear 38 Sun gear 39 Reverse planetary gear 0 forward planetary gear 41 paper ejection idle spring 42 discharge transmission gear

 ─────────────────────────────────────────────────── (72) Inventor Hideaki Kawakami 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Hitoshi Nakamura 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Incorporated (72) Inventor Akira Kida 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Takashi Nojima 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. ( 72) Inventor Takeshi Iwasaki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (24)

[Claims] 1. A feeding unit for feeding a sheet in a predetermined direction, a conveying unit for conveying the sheet fed by the feeding unit in a predetermined direction, and image information on the sheet conveyed by the conveying unit. Accordingly, recording means for recording an image, carrying-out means for carrying out the sheet recorded by the recording means, and forward / reverse rotation for driving the feeding means, the conveying means and the carrying-out means are possible. Drive means and drive transmission means for transmitting a driving force from the drive means to the feeding means, the conveying means and the unloading means, respectively, and the feeding means is driven in the sheet conveying forward direction, and A recording apparatus, wherein the carry-out means has a state in which drive is not transmitted. 2. The feeding means is driven in the forward direction of the sheet conveyance, the conveying means is driven in the reverse direction of the sheet conveyance, and the unloading means has a state in which the drive is not transmitted (stopped). Recording device. 3. The driving means is driven in the forward direction to drive the feeding means in the forward direction, the conveying means in the reverse direction, and the carrying-out means in a stopped state, and then the driving means is driven in the forward direction. 3. The recording apparatus according to claim 2, wherein the carrying means is driven in the forward direction and the unloading means is driven in the forward direction. 4. A feeding unit for feeding a sheet in a predetermined direction, a conveying unit for conveying the sheet fed by the feeding unit in a predetermined direction, and image information on the sheet conveyed by the conveying unit. Accordingly, recording means for recording an image, carrying-out means for carrying out the sheet recorded by the recording means, and forward / reverse rotation for driving the feeding means, the conveying means and the carrying-out means are possible. Drive means, and drive transmission means for transmitting a driving force from the drive means to the feeding means, the conveying means, and the unloading means, respectively, and the drive transmitting means to the unloading means includes the conveying means. A recording apparatus, wherein the carrying-out means is driven in the forward direction when the carrying means is driven in the forward direction, and the carrying-out means is stopped when the carrying means is driven in the reverse direction. 5. The recording apparatus according to claim 4, wherein the drive transmitting means to the feeding means rotates the feeding means only in the feeding direction regardless of the driving direction of the conveying means. 6. A drive transmission means for driving the unloading means via the carrying means, the carrying roller being the carrying means, the driving force being rotationally transmitted to the carrying roller in contact with the carrying roller, and the rotation center being movable to the center of the carrying roller. 6. The idle roller, and a drive transmission means for transmitting drive to the carry-out means or the carry-out means provided at a position where the idle roller is moved toward and away from the center of the idle roller. Recording device. 7. A plurality of planetary gears are provided as means for the drive transmission means to the feeding means to rotate the feeding means only in the feeding direction regardless of the rotation direction of the conveying means,
7. The recording device according to claim 4, wherein the planetary gear revolves a sun gear corresponding thereto. 8. A recording apparatus, characterized in that a spring shape for directly contacting the discharging means is provided with a bent and raised portion of approximately 45 ° to 135 ° at the end. 9. A recording apparatus, wherein a spring shape for directly pressing the conveying means is provided with a bent and raised portion of approximately 45 ° to 135 ° at an end. 10. A recording apparatus, characterized in that a spring shape for directly contacting a driving force transmitting means is provided with a bent and raised portion of approximately 45 ° to 135 ° at an end portion. 11. A sheet feeding unit that feeds a sheet in a predetermined direction, a driving unit that can rotate forward and backward, a driving unit that is driven by the driving unit, and is fed by the feeding unit when the driving unit rotates in the forward direction. Conveying means for conveying the fed sheet in a predetermined direction and conveying the sheet in a direction opposite to the predetermined direction when the driving means rotates in the reverse direction, and the conveying means conveys the sheet in the predetermined direction. Carrying-out means for carrying out the sheet; first transmitting means for transmitting the drive to the feeding means when the driving means rotates in the reverse direction; and driving for the carrying-out means when the driving means rotates in the forward direction. And a second drive transmission unit that transmits the driving force and does not transmit the driving force to the unloading unit when the driving unit rotates in the opposite direction. 12. When the drive means rotates in the opposite direction, the leading edge of the sheet fed by the feeding means abuts against the conveying means which is reversed and is stopped, and the sheet is conveyed by the feeding means and the conveying means. The sheet conveying apparatus according to claim 11, wherein the sheet conveying apparatus is configured to be curved between them. 13. The second drive transmission means includes a first rotating body that rotates forward and backward in conjunction with the driving means, a second rotating body that interlocks with the unloading means, and the first rotating body. When the first rotating body is pressed by the body and rotates in the forward direction, the first rotating body comes into contact with the second rotating body to transmit the drive of the first rotating body to the second rotating body, A third rotating body that is separated from the second rotating body and does not transmit drive to the second rotating body when the rotating body rotates in the opposite direction.
2. The sheet conveying device according to item 2. 14. The sheet conveying apparatus according to claim 13, wherein the third rotating body is moved by a frictional force received from the second rotating body. 15. The sheet conveying apparatus according to claim 14, wherein the third rotating body is pressed against the first rotating body by a spring. 16. The coil spring according to claim 15, wherein the spring includes a coil spring whose end is in contact with the third rotating body.
The sheet conveying device described. 17. The sheet conveying apparatus according to claim 16, wherein the coil spring biases the third rotating body in a direction of pressing the third rotating body against both the first rotating body and the second rotating body. 18. The contact between the coil spring and the third rotating body so that the direction of the urging force of the coil spring does not change so as to strongly press the third rotating body against the first rotating body. 18. The sheet conveying apparatus according to claim 17, further comprising a regulation unit that regulates displacement of points. 19. The regulating means regulates relative displacement of the third rotating body with respect to the coil spring.
19. The sheet conveying device according to claim 18, further comprising a bent and bent portion in which a wire of the coil spring is bent and bent from an end surface. 20. The sheet conveying apparatus according to claim 19, wherein the bending and raising portion regulates a contact point between the coil spring and the third rotating body so as not to deviate in a direction approaching the second rotating body. 21. The sheet conveying apparatus according to claim 11, wherein the conveying unit has a pair of conveying rotating bodies. 22. A feeding means for feeding a sheet in a predetermined direction, a driving means capable of rotating in the forward and reverse directions, a driving means driven by the driving means, and fed by the feeding means when the driving means rotates in the forward direction. Conveying means for conveying the fed sheet in a predetermined direction and conveying the sheet in a direction opposite to the predetermined direction when the driving means rotates in the reverse direction, and the conveying means conveys the sheet in the predetermined direction. Recording means for recording on a sheet, carrying-out means for carrying out a sheet on which recording has been performed by the recording means, and first transmission means for transmitting drive to the feeding means when the drive means rotates in the opposite direction. And second drive transmission means for transmitting drive to the carry-out means when the drive means rotates in the forward direction and not transmitting drive to the carry-out means when the drive means rotates in the reverse direction. A recording device characterized by: 23. The recording apparatus according to claim 22, wherein the recording unit ejects ink to perform recording. 24. The recording apparatus according to claim 23, wherein the recording means ejects ink by thermal energy.