JPH03238243A - Feeder and recorder equipped with feeder - Google Patents

Abstract

PURPOSE:To prevent the unnecessary feeding of a recording medium during gear change by having a gear, which transmits the driving force of a driving means to a feeding means, made up with the first gear and the second gear installed on the same shaft as in the first gear so that when the first gear rotates a preset angle or more, rotational movement can be transmitted to the second gear. CONSTITUTION:A gear which transmits the driving force of a driving means to a feeding means is made up with a first gear 9i1 interlocking with a transmitting gear and the second gear 9i2 installed on the same shaft as in the first gear 9i1. Next, since there is necessity for being in phase between the driving gear 9b and a transmitting gear 9h during changing the transmitting gear 9h and for releasing pressure between tooth flanks during interlocking, the driving gear 9b is given a preset amount of positive or negative turn. At this time, although the first gear 9i1 interlocking with the transmitting gear 9h is turned positively and negatively with the driving gear, the rotation of the first gear 9i1 is not transmitted to the second gear 9i2. That means there is no possibility of delivering a recording medium unnecessarily during changing the transmitting gear.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a feeding device in which there is no possibility of jamming of a recording medium, and a recording device equipped with the feeding device.

<Prior Art> Conventionally, in the field of recording devices, especially serial printers, there is a need for a carrier equipped with a recording head, movement of the carriage, feeding of recording paper,
It is necessary to drive the automatic paper feeder (hereinafter referred to as ASF), and inkjet systems require operations such as nozzle capping and bombing to prevent nozzles from drying out, and usually there are separate operations for each operation. Drive sources such as motors and solenoids were provided.

However, providing an independent drive source for each operation not only increases the cost significantly, but also increases the size of the device.

Therefore, a drive transmission device as disclosed in Japanese Patent Application Publication No. 1-139307 has been proposed.

According to this, a plurality of transmission gears arranged coaxially,
A drive gear that can be individually switched and engaged with the transmission gear is provided, and the transmission gear that transmits the driving force from the same drive source is selected depending on the movement position of the carriage and the carriage, so that each of the operations described above is performed. It does not require an independent driving source for the motor.

<Problems to be Solved by the Invention> However, in the conventional example, when switching the transmission gear, it is necessary to align the phase between the drive gear and the transmission gear and to release the pressure between the tooth surfaces during meshing. Therefore, it is necessary to rotate the drive gear forward or reverse by a predetermined amount, which may change the feeding amount of the ASF recording paper, or in the worst case, cause a paper jam inside the ASF. There were drawbacks such as

In other words, since a one-way clutch is generally used for the separation rollers inside the ASF, the separation rollers rotate in either the forward or reverse direction and feed the recording paper. In an ASF having two paper feed ports, for example, the paper feed is switched by feeding paper from one paper feed port in forward rotation and from the other paper feed port in reverse rotation.

Therefore, when switching to the transmission gear that transmits driving force to the ASF, when the drive gear rotates forward or reverse, this is transmitted to the ASF via the transmission gear, and the recording paper is always fed little by little from both paper feed ports at the same time. This may cause a situation where the amount of paper being fed changes, or in the worst case scenario, when a large amount of paper is being fed from one paper feed slot, paper may also be fed from the other paper feed slot. It had the disadvantage that it could develop into a paper jam in some cases.

An object of the present invention is to solve the above-mentioned conventional problems, and to provide a feeding device and the feeding device in which unnecessary feeding of a recording medium is not performed when changing gears, and there is no risk of jamming of the recording medium. The present invention provides a recording device that has the following features.

<Means for Solving the Problems> A typical means according to the present invention for solving the above problems includes a plurality of transmission gears arranged on the same axis and movable on a drive shaft parallel to the axis. and a drive gear that can be individually switched and engaged with the transmission gear, the drive gear selectively transmitting driving force by meshing with one of the transmission gears, and the drive means a feeding means to which a driving force is selectively transmitted to feed the recording medium, and a gear that transmits the driving force of the driving means to the feeding means, a first gear that meshes with the transmission gear; a gear, and the first
and a second gear coaxially provided, and configured such that when the first gear rotates by a predetermined angle or more, the rotation is transmitted to the second gear. There is.

In the above means, when switching the transmission gear, it is necessary to align the phase between the drive gear and the transmission gear and to release the pressure between the tooth surfaces during meshing. or reverse rotation, but at this time the first gear that meshes with the transmission gear
The gear rotates forward and backward by the drive gear, but the rotation of the first gear is not transmitted to the second gear.

That is, there is no risk of unnecessary conveyance of the recording medium when switching the transmission gear.

<Embodiment> Next, an embodiment of the present invention will be described in which the above-mentioned means is applied to a serial type hub recording method recording apparatus.

FIG. 1 is an overall perspective explanatory view of the recording apparatus, and FIG. 2 is a side cross-sectional explanatory view.

(Overall Configuration) First, the overall configuration of the apparatus will be described. A recording sheet (a) 1 serving as a recording medium is conveyed by a sheet a conveying means 2. At this time, the recording sheet 1-1 is pressed against the conveying roller 2a by the sheet pressing member 3, so that it does not float up from the platen 4.

When the recording sheet 1 is conveyed, the rollers y, . The sort 1 is configured to be discharged by a discharge means 8.

Here, the sheet conveyance means 2, the conveyance means 8, etc. are driven by a drive motor 9a, which is the same drive source, and the drive means 9 having this drive motor 9a is located at one end of the recording apparatus (see FIG. located on the left).

Further, an ink cartridge 7f for supplying ink to the recording means 7 and a recovery device 10 for removing ink sticking to the recording head 7 are arranged at one end of the recording device.

The carriage 5 is connected to a transmission means (not shown) in which the driving force of a carriage motor 5d (see FIG. 7) serving as a driving source is transmitted to the carriage 5.
It is transmitted to the carriage 5 via a pulley, a timing belt), and is thereby reciprocated.

Next, the configuration of each part of the recording apparatus will be specifically explained.

(Sheet Conveying Means) The sheet a conveying means 2 is for conveying the recording sheet 1 to the recording position, and includes recording sheets fed from ASFII as a feeding means, recording sheets manually fed from the manual feed port 12, Or tractor 1 for transporting fan hold paper
The fan-hold paper serving as recording sheet 1 fed from No. 3 is conveyed.

The sheet conveying means 2 in this embodiment is indicated by the arrow a in FIG.
A conveyance roller 2a that is driven to rotate in the direction, and a front pinch roller 2bl and a rear pinch roller 2 that are driven and rotated by the conveyance roller 2a.
The recording sheet 1 is conveyed by the recording sheet 1 and the recording sheet 1.

The conveyance roller 2a has a roller shaft 2 rotatably supported at both ends by the left and right side walls 14a and 14b of the device frame.
It is divided into multiple parts and attached to the a+.

The reason why the conveyance roller 2a is divided into parts as described above is to reduce the number of rubber members that constitute the roller 2a to reduce costs and to reduce the weight of the apparatus.

A conveying gear 2a2 is provided at one axial end of the roller shaft 2a.
is provided, and driving force is transmitted from the drive motor 9a.

Said pinch roller-2b1. 2bz is supported by swingable pinch roller holders 2bs and 2ba, and is supported by springs 2c, 2ct, and the transport roller 2a.
are in pressure contact with the surfaces of the conveyor rollers 2a, and are rotated as a result of the rotation of the conveyance roller 2a. Therefore, the recording sheet 1 is rotated by the conveyance roller 2a and the pinch roller 2b.

A conveying force is applied by being nipped with 2b and 2b.

Further, below the conveyance roller 2a, as shown in FIG. 2, a paper pan 2d curved along the circumferential surface of the conveyance roller 2a is attached.

The paper pan 2d extends to the manual feed port 12 and is configured to serve as a lower guide for the manually fed recording sheet 1.

Further, upper guide plates 15 and 16 are attached above the paper pan 2d at a predetermined interval, and constitute a conveyance path for the recording sheet 1.

Further, a conveyance path separating plate 17 is provided between the paper pan 2d and the upper guide 16, and separates the conveyance path of the fan-hold paper fed from the tractor 13 and the conveyance of the recording sheet 1 fed from the ASFII. It is separated from the road.

In the above configuration, the conveyance roller 28 is driven by the drive motor 9.
When rotated in the direction of arrow a in Fig. 2 using a, the ASFI
The recording sheet 1 fed from I passes between the upper guide plate 16 and the conveyance path separation plate 17, is nipped by the front pinch roller 2b and the conveyance roller 2a, and is then nipped along the circumferential surface of the conveyance roller 28. Conveyed in a U-turn, and further pinch rollers
2bi and the conveyance roller 2a, and is conveyed to the recording position located above.

Further, the fan hold paper as a recording sheet conveyed from the tractor 13 is transferred between the paper pan 2d and the conveyance path separating plate 17.
, is similarly nipped between the front pinch roller 2b and the conveyance roller 2a, is conveyed in a U-turn along the circumferential surface of the conveyance roller 2a, and is further transferred to the rear pinch roller 2bz.
The recording medium is nipped between the recording medium and the conveyance roller 2a, and conveyed to the recording position located above.

On the other hand, the recording sheet +-i fed from the manual feed port 12 is nipped by the conveyance roller 2a and the rear pinch roller -2bz, and conveyed to the recording position.

(Sheet Pressing Member) The sheet pressing member 3 is used to prevent the recording sheet 1 from floating up from the platen 4 by pressing the recording sheet 1 conveyed by the conveyance means 2 against the conveyance roller 2.

As shown in FIG. 1, this sheet pressing member 3 is composed of a single plate-like member wider than the movement range of the carriage 5 so as to hold down the entire width of the recording sheet 1, and this sheet holding member 3 is configured to hold a plate-shaped member wider than the moving range of the carriage 5, and this is used to hold springs, etc. (not shown). Each conveyance roller 2 is
It is in pressure contact with a.

The tip of the sheet pressing member 3 is located below the recording position by the recording means 7, and the conveyed recording sheet 1 is pressed by the member 3 against the conveying roller 2a.

As a result, the recording sheet 1 at the recording position is placed on the platen 4.
It will no longer float up from the surface.

Further, the front end of the carriage 5 is always in contact with the sheet pressing member 3, as will be described later.

(Carriage) The carriage 5 is for reciprocating the recording means 7 in the width direction of the recording sheet 1.

The carriage 5 is slidably attached at both ends to a guide rail 6 having a circular cross section fixed to the left and right side walls 14a and 14b, and is reciprocated on the guide rail 6 by a carriage motor 5d.

The carriage 5 is rotatably mounted around a guide rail 6, and a springy portion 5a provided on the carriage 5 comes into pressure contact with a guide rail 15a provided on the upper guide 15, and the reaction force causes the seat to be seated. It is urged so as to be in constant contact with the holding member 3. carriage 5
The part where they collide is near the back side of the contact area between the sheet pressing member 3 and the conveyance roller 23, and when the sheet pressing member 3 retreats in the direction of the recording means 7 due to the passage of the recording sheet 1, the carriage 5 similarly retreats in the same direction. .

Therefore, the distance between the recording means 7 and the recording sheet 1 is always constant regardless of paper thickness, and stable printing quality can be maintained.

(Recording Means) The recording head 7 as a recording means is mounted on the carriage 5 as described above, and records an ink image on the recording sheet 1 conveyed by the sheet conveying means 2. As a recording head in this apparatus, an inkjet recording method is suitably used.

The inkjet recording method uses an orifice (liquid ejection port) to eject recording ink liquid as flying droplets.
a liquid flow path that communicates with the orifice, and an ejection energy generating means that is provided in a part of the liquid flow path and provides ejection energy for forming flying droplets in the ink liquid in the flow path. It is equipped with and driving the ejection energy generating means according to the image signal,
An image is created by ejecting ink droplets.

Examples of the ejection energy generation means include a method using pressure energy generation means such as an electromechanical transducer such as a Viez element, and an electromagnetic energy generation method in which a magnetic wave such as a laser is irradiated and absorbed by the ink liquid to generate flying droplets. There is a method using a thermal energy generating means such as an electrothermal converter or a method using a thermal energy generating means such as an electrothermal converter. Among these methods, a method using a thermal energy generating means such as an electrothermal converter is preferable because it allows the orifices to be arranged in high density and the recording head can be made compact.

In this embodiment, the recording means is the Ink Geno I.
A bubble jet recording method, which is one of the recording methods, is used.

FIG. 9 is an explanatory diagram of the configuration of the recording device 7 constituting the recording means, and FIGS.

In FIG. 9, 7a is a heater board, on which an electrothermal converter (discharge heater) 7b and an electrode 7c made of aluminum or the like for supplying electric power to this are formed and arranged. . A top plate 7e having a partition wall for partitioning a liquid path (nozzle) 7d for recording liquid is adhered to the heater board 7a. Further, as shown in FIG. 1, the recording head 7 is located on the left side of the device.
An ink cartridge and shifter f for supplying ink are replaceably attached.

The ink supplied from the ink cartridge shift f through a conduit (not shown) is filled into the common liquid chamber 7g in the recording head door from the supply lower e+ provided on the top plate 7e.
The liquid is guided into each nozzle 7d from this common liquid chamber 7g. These nozzles 7d have ink ejection ports (orifices) 7d,
The orifice 7d1 is formed with a predetermined pinch in the feeding direction (vertical direction in FIG. 1) facing the recording sheet 1 of the recording head 7.

Here, the principle of ink flight in the bubble jet recording method will be explained with reference to FIGS. 10(a) and 10(b).

In the steady state, as shown in FIG. 10(a), the nozzle 7d
The surface tension and external pressure of the ink 7h filled inside are balanced on the orifice surface. When the ink 7h is to be ejected in this state, the electrothermal converter 7b in the nozzle 7d is energized to cause the temperature of the ink 7h in the nozzle 7d to exceed nucleate boiling and rapidly rise in temperature. Then, Figure 10 (b
), the ink 7 adjacent to the electrothermal converter 7b
h is heated to produce microbubbles, and the ink 7h in the heated portion is vaporized and causes low boiling, as shown in Figure 10 (C).
As shown in the figure, the bubble 7h+ grows rapidly.

As shown in FIG. 10(d), when the bubbles 7h grow to the maximum, ink droplets are pushed out from the orifice surface in the nozzle 7d, and at that speed the ink droplets fly onto the recording sheet 1, forming an ink image. This is to record.

When the electricity supply to the electrothermal converter 7b is finished, the state shown in FIG. 10 (e
) As shown in Figure 10, the grown bubbles 7h are cooled and contracted by the ink 7h in the nozzle 7d.
As shown in FIG. 3, the ink 7h contacts the surface of the electrothermal converter 7b and is rapidly cooled, and the bubbles 7h either disappear or shrink to an almost negligible volume. and the bubble 7h,
When the ink 7h contracts, the ink 7h is supplied from the common liquid chamber 7g into the nozzle 7d by capillary action as shown in FIG.

Therefore, an ink image is recorded on the recording sheet 1 by energizing the electrothermal transducer 7b in synchronization with the movement of the carriage 5 in accordance with the image signal.

The recovery device 1o provided at one end of the moving range of the carriage 5 (the left end in FIG. 1) covers the ink ejection surface of the recording head 7 during non-printing, so that the recovery device 1o can protect the area near the orifice surface of the recording head 7. This prevents the ink from drying out and the resulting solidification.

In addition, a pump is connected to the recovery device 10 as described later, and the pump is driven to prevent ink discharge failure, removal, or the like, and the recovery process is performed by suctioning ink from the orifice surface using its suction force. It has become so.

(Discharging means) The discharging means 8 is the recording sheet 1 recorded by the recording means 7.
It is for discharging.

As shown in FIGS. 1 and 2, this structure is composed of a discharge roller 8a and a discharge pinch roller 8b in contact with the discharge roller 8a. Roller shaft 8c of the discharge roller 8a
A discharge gear 8d is attached to the end of the discharge gear 8d, and when the driving force of the drive motor 9a is transmitted to the discharge gear 8d,
The driving force is transmitted to the discharge roller 8a, which rotates, and the recording sheet 1 is discharged by the cooperative action of the discharge roller 8a and the discharge pinch roller 8b.

The discharged recording sheet 1 is stacked on a discharge stacker 8e located above the discharge roller 8a.

Here, a discharge tray 8f is placed at the upper end position of the discharge stacker 8e.
is rotatably attached via the bin 8f1, and is provided with a convex portion 8el.

The convex portion 8e+ is for, when the discharged recording sheet 1 buckles, the lower end of the recording sheet protrudes toward the discharge roller 8a side to smoothly discharge the paper. It is desirable to set the protrusion amount from the surface of 8e to about 2 m - 10 pieces.

Further, the discharge tray 8r is placed in a second position with the bin 8ft as a fulcrum.
The ASF is designed to fall down in the direction of the arrow shown in the figure.
It is designed so that it does not get in the way when loading the recording sheet 1 into II.

(ASF) ASFII automatically transfers the recording sheet to the conveyance roller 2a.
This embodiment has a double bin structure consisting of a front bin 11a and a rear bin Ilb.

The bins lla, llb have roller shafts 11a1. ]
,], separation roller 1187.11b supported by b+
2, and a pressure plate 11a3.11b on which the recording sheet I is loaded.
+, and pressing springs lla, llb that press the recording sheet 1 on the pressure plate 11a3.1.1b1 toward the separation roller 11a211bz.

The roller shafts 11a+ and 11b1 are, for example, grooved shafts, and a clutch gear 11a1.11b having a built-in one-way transmission clutch is installed at one end in the axial direction,
Driving force is transmitted from the drive motor 9a. Note that the roller shafts 11a, llb may be shafts having an angular cross section.

Further, the separation roller 1]a2.1]b2 rotates together with the roller shafts 11a1, 11b[, and is slidable in the axial direction with respect to the roller shafts 11a+, 1b1.

Also, on the downstream side of the ASFII is a registration roller II.
c and an upper roller 11d pressed against the upper roller 11d, and a registration gear lie is provided at one end in the axial direction of the registration roller 11c, so that driving force is transmitted from the drive motor 9a. .

The recording sheets 1 stored in the front bin Ila and the rear bin Ilb are pressed against the separation rollers 11az and 11b2 by pressure plates 11az and 1lbz, and when the separation roller 1182 is rotated forward by the roller shaft 11a+,
One recording sheet 1 in the front bin lla is separated and fed to the nip between the downstream registration roller 11c and the upper roller lid, and comes into contact with the roller shaft 11.
When the separation roller 11bg is reversed by bl, one recording sheet 1 in the rear bin Ilb is separated and similarly fed to the nip portion between the downstream registration roller 11c and the upper roller 11d and brought into contact therewith.

When the registration roller 11c rotates normally, the recording sheet 1 is rotated by the registration roller 11c and an upper roller 11 (l) which rotates in accordance with the registration roller 11c, and is fed to the sheet feeding means 2.

That is, the separation roller 1 is separated by the roller shaft 11a.
1az is rotated forward (when the clutch gear 11a is rotated in the direction of arrow CI shown in FIG. 5), the front bin lla
The recording sheet 1 is fed from the roller shaft 11b,
When the separation roller 11b2 is reversed (when the clutch gear 11b is rotated in the direction of arrow C2 shown in FIG. 5), the recording sheet I.1 is fed from the rear bin Ilb, and the paper feed is switched. is now possible.

Further, the pressure plates 11aa are provided on the bottles lla and llb.

Side guides 1laa and 1lb6 are provided that slide on the bins 11b3 in the width direction of the bins lla and llb. These side guides 1lab and 1lba are slidable in synchronization with the separation roller 118211b2, and the iC! It can correspond to recording sheet 1.

(Recovery Device) The recovery device 10 includes a cap 10a that camps the ink ejection surface of the recording gutter 7, and a cap carriage 10c that supports the cap 10a and moves on a guide axis Job parallel to the guide rail 6. The cap 10
It is composed of a pump l0CI, etc., which generates negative pressure in a and sucks ink stuck to an ink ejection surface, etc.

When the carriage 5 moves out of the recordable range at one end of the recording device, the projection 5b provided on the carriage 5 slidably holds the cap 10a, while the projection IDc protrudes from the cap carriage 10c. They fit together, and as a result, the carriage 5 and the camp carriage 10c
move as one.

A cap IO is located behind the cap carriage 10c.
A rail 10e on which the rear part of the cap 10a slides is provided, and as the cap carriage 10c moves, the cap 10a
It is designed so that it protrudes forward. As a result, when the carriage 5 moves toward one end of the recording apparatus, the camp 10a protrudes forward and caps the ink ejection surface of the recording head door.

Further, a cap 1 (not shown) is provided between the lower part of the cap carriage 10c and the left side wall 14a of the recording apparatus, and the cap carriage 10c is always urged in the right direction in FIG. .

A fixed shutter 10g is provided on the upper surface of the cartridge device 71 into which the ink cartridge 2 shift f is loaded, and when the transmission type sensor 5c mounted on the carriage 5 passes therethrough, the position of the carriage 5 is determined. It is designed to detect.

Whether or not the cap 10a is capping the ink ejection surface is determined by the number of steps of the carriage motor (not shown) from the detection position.

The pump 10d and the cap 10a are connected by a tube (not shown), and the acid pump 10d is operated by a pump cam 10h, which will be described later.

(Drive means) The drive means 9 is arranged at a rear position of the recovery device 10,
It transmits the driving force of the drive motor 9a to the sheet conveyance means 2, the discharge means 8, the ASFII, and the recovery device 10, and is constituted by the drive motor 9a and a gear transmission mechanism.

The gear transmission mechanism is configured to transmit the carriage 5 when the carriage 5 moves outside the recordable range on one end side of the recording device.
The switching operation is performed by

FIGS. 3 and 4 show the gear transmission mechanism in detail, including a drive gear 9b that transmits the driving force of the drive motor 9a, and a transfer output that is a transmission gear that selectively meshes with the drive gear 9b. It is composed of a gear 9c, an ASF output gear 9d, a pump gear 9e, etc.

The drive gear 9b is attached to a slide shaft 9b having an angular cross-section as a drive shaft so as to be movable only in the axial direction, and the drive motor 9a is attached to the end of the slide shaft 9b.
Gear 9 to which driving force is transmitted from through intermediate gear 9b
bs is fixed. Therefore, the drive motor 9a
When the gear 9b3 operates, the drive gear 9b rotates together with the slide shaft 9b+.

Further, a slide holder 9b4 is slidably and rotatably supported on the slide shaft 9b so as to sandwich the drive gear 9b therebetween. A bifurcated protrusion 91 is provided at the bottom of the slide holder 9b, and the protrusion 9bs engages with the guide rail 9L of the frame 9f that supports the gear transmission mechanism to prevent rotation. , the free end of a connecting plate spring 10c2 provided at the rear of the cap carriage 10c is engaged.

Therefore, when the carriage 5 moves in the left-right direction in FIG. 1 at one end of the recording apparatus, the camp carriage 10c
The slide holder 9b is moved in the same direction via the slide holder 9b.

That is, the driving gear 9b is slid by the carriage 5 and the conveyance output gears 9c and A are transmission gears.
It selectively meshes with the SF output gear 9d and pump gear 9e.

The conveyance output gear 9c, the A, SF output gear 9d
The pump gears 9e have the same number of teeth and the same pitch diameter, and are rotatably supported by support shafts 9g provided on the frame 9f in parallel with the slide shaft 9b+.

Here, the conveyance output gear 9c is composed of a large-diameter gear portion 9c+ that meshes with the drive gear 9b, and a small-diameter gear portion 9ct that meshes with an intermediate gear 9h rotatably attached to the left side wall 14a. .

The intermediate gear 9h meshes with the conveyance gear 2az fixed to one end of the conveyance roller 2a in the axial direction and the discharge gear 8d, and also has a small diameter gear portion 9 (2 is the registration gear li).
When the drive motor 9a is operated at the time when the drive gear 9b is engaged with the gear portion 9c+, the conveyance roller 28, the ejection roller 8a, and the registration roller 11
c rotates forward/reverse.

Further, the ASF input gear 91 provided on the ASFll side is engaged with the ASF output gear 9d, and when the drive gear 9b meshes with the ASF output gear 9d, the ASF input gear 91 is turned on by the drive motor 9a. Rotate forward/reverse.

As shown in FIG. 5, a transmission gear train consisting of intermediate gears 9L9 and 9FF is provided between the A and SF input gears 91 and the clutch gears 1las and 1lbs.

When the ASF output gear 9d is rotated normally (in the direction of arrow c1 shown in FIG. 5) by the drive motor 9a, this rotation is caused by the AS
The information is transmitted to the clutch gear 11a5 via the gear 9j between the F input gears 91, and the clutch gear 11a rotates in the direction of arrow C1, causing the separation roller 11a2 to rotate in the forward direction, thereby separating the recording sheets 1 from the front bin lla. will be delivered. At this time, the ASF input speed is 910 rotations at the rear bin ll.
It is also transmitted to the clutch gear 11b on the b side, but the arrow C
The separation roller 11 is rotated in three directions by a one-way transmission clutch built in the clutch gear 11b.
It is not transmitted to b2.

When the drive motor 9a rotates the ASF output gear 9d in the reverse direction (in the direction of arrow c2 shown in FIG. 5), the rotation is A, the SF manual gear 91, the intermediate gear 9j, the clutch gear 11a3, the intermediate gears 9k, 9! The separation roller 11b2 is transmitted to the clutch gear 11b through the clutch gear 11b, which rotates in the direction of arrow c2.
is reversed, and the recording sheet 1 is fed from the rear bin Ilb. At this time, the rotation of the ASF input gear 91 is also transmitted to the clutch gear 1las on the front bin lla side, but the rotation is in the direction of arrow C2, and the one-way transmission clutch built in the clutch gear 11a causes the separation. It is not transmitted to roller 1'la=.

Further, the pump gear 9e meshes with a gear portion 10h+ of the pump cam 10h (first concave part), and when the drive gear 9b meshes with the pump gear 9e, the pump cam 10h is operated by the drive motor 9a. As a result, the pump 10d operates to perform pumping and the like.

The connecting plate spring 10C2 is connected to the drive gear 9b, the conveyance output gear 9c, the ASF output gear 9d, and the pump gear 9.
When engaged with e, it acts as a buffer member.

For example, the drive gear 9b is connected from the conveyance output gear 9C to the A
When moving to SF output gear 9d, transfer output gears 9C and A
If the phase of the SF output gear 9d is out of phase, the teeth of the drive gear 9b separated from the conveyance output gear 9c will be in contact with the ASF output gear 9.
It doesn't mesh well with d. At this time, the side surface of the drive gear 9b and the side surface of the ASF output gear 9d come into contact and do not move any further, but the cap carriage 10c moves to a predetermined position (a position where the drive gear 9b completely meshes with the ASF output gear 9d). It ends up. The difference in the amount of movement between the drive gear 9b and the cap carriage 10c is determined by the connecting plate spring 10C2.
Absorb by bending. After that, when the drive motor 9a is driven and the drive gear 9b is rotated by about one tooth, the drive gear 9b
is the elastic force due to the bending of the connecting plate spring 10CZ.
Since it is in pressure contact with the output gear 9d, the drive gear 9b slides when the phases match and completely meshes with the ASF output gear 9d. Then, the drive gear 9b is further moved to the left side in FIG. 1 to slip through the ASF output gear 9d,
If it is brought into contact with the pump gear 9e and similarly phased, it will mesh with the pump gear 9e.

Further, for example, immediately after the drive gear 9b meshes with the conveyance output gear 9c and conveys the recording sheet 1, the teeth of the drive gear 9b and the conveyance output gear 9c are in pressure contact with each other, and a frictional force is generated between the teeth. Does not slide smoothly. At this time as well, the difference in the amount of movement between the drive gear 9b and the camp carriage 10c is temporarily absorbed by the bending of the connecting plate loc. After the cap carriage 10c is moved, the drive motor 9a is driven in the opposite direction to the previous direction, and the drive gear 9
By slightly reversing b, the pressing force between the teeth of the drive gear 9b and the conveyance output gear 9C is eliminated, and the frictional force is removed, and the drive gear 9b is slid by the elastic force of the connecting plate spring 10c2. Send it to the location.

As described above, the drive gear 9b is connected to the conveyance output gear 9c.
, ASF output gear 9d, and pump gear 9e, the connecting plate spring 10c2 acts as a buffer member, and the drive gear 9b engages the conveying output gear 9c,
Regardless of whether or not the ASF output gear 9d is in pressure contact with the pump gear 9e, when the drive gear 9b is disengaged or engaged, the drive gear 9b is always rotated forward or reverse to perform a gear switching operation. .

Therefore, when switching the transmission gear, the clutch gears 1las and 1lbs rotate slightly, which may cause the recording sheets 1 to be slightly fed out from the front bin lla and rear bin lb at the same time.

In order to prevent this, as shown in 6(a) and 6(b), the ASF input gear 91 is connected to the input drive gear 911 as a first gear meshing with the ASF output gear 9d and the intermediate gear 9J. The input driven gear 9iz is a second gear that meshes with the input driven gear 9iz, and the input driven gear 9il and the input driven gear 9i2 are combined with each other so as to coaxially rotate by a predetermined angle with some play. That is, when the input drive gear 91 rotates by a predetermined rotation angle or more, the rotation is transmitted to the input driven gear 91°.

Therefore, when switching the transmission gear, the drive gear 9
Even if b rotates slightly forward or reverse, this rotation is absorbed by the play between the input drive gear 9i+ and the input driven gear 912, and the clutch gears 1las and 1las are rotated through the intermediate gear 9j and the like.
Not transmitted to l1bs.

In this embodiment, the input driven gear 9iz is the gear 9
gear portion 904z that meshes with j, and the input drive gear 9i.
+ disk 911. and a slit provided in the input drive gear 9i+ on the disc 9112)
Engaging claw 921 that engages with 90i+! is provided,
It is adapted to be attached to the input drive gear 9i+ in a state where it can rotate by a predetermined angle.

Further, a protrusion 911° is provided on the side surface of the input drive gear 9i+, and a protrusion 911° is provided on the side surface of the disc 9112.
An arcuate recess 931 with which f is movably engaged! is provided. and the protrusion 911. and the disk 91i
1, there is a spring 943 which is an elastic member for return.
is provided in the recess 9312, and the protrusion 91L is provided in the recess 9312.
A stopper 94it is provided.

Here, the spring 9ia is connected to the input drive gear 9i+ after the drive gear 9b passes the ASF output gear 9d.
This is to return the input drive gear 9i to the initial position, that is, the neutral position relative to the input driven gear 9ig, as shown in FIG.

Further, the stopper 9412 is for regulating the rotation angle α between the input drive gear 9i1 and the second gear 94z.
This rotation angle α is set to be greater than or equal to the angle at which the drive gear 9b rotates forward/reversely when switching gears, and the rotation angle α is set to be greater than the angle at which the drive gear 9b rotates forward/reversely when switching gears.
Rotation is prevented from being transmitted to iz.

When the input drive gear 9i+ rotates forward or reverse by the rotation angle α or more by the ASF output gear 9d, the protrusion 91i,
contacts the stopper 9412, the rotation is transmitted to the input driven gear 9iH, and the clutch gear 11a3.11b via the gears 9j9k 9j2.

The driving force of the drive motor 9a is transmitted to.

(Control Means) The control means 18 for controlling the drive means 9 includes a CPU 18a for controlling the entire recording apparatus, as shown in FIG.
A ROM 18b that stores the control contents of ASFII and various data shown in the flowchart of FIG. 8, and a CPU 1
It is composed of a RAM 18c, which is used as a work area for the computer 8a, and temporarily stores various data such as the number of sheets to be recorded, and an interface 18d. The drive motor 9a is connected to the interface 18d via a driver 18e, and the driver 18
The recording head 7 is connected via f, the carriage motor 5d is connected via a driver 18g, and the transmission type sensor 5c is further connected.

FIG. 8 is a flowchart showing the control details when the recording notebook 1 is fed, recorded, and discharged from the ASFII.

When there is a recording command, the drive gear 9b is set to A at step 310.
A switching operation is performed by meshing with the SF output gear 9d.

Next, in step S11, it is determined whether the paper is to be fed from the front bin lla or the rear bin llb.

In the case of paper feeding from the front bin lia, the process moves to step S12 and the ASF output gear 9d is rotated in the 01 direction, and in the case of paper feeding from the rear bin llb, the process moves to step 313 and the ASF output gear 9d is rotated. Rotate in the c2 direction.

At this time, the recording sheet l is transferred from the front bin lla or the rear bin llb to the registration roller 11c and the upper roller 11c.
ASF until it comes into contact with the nip and a loop is formed.
The output gear 9d rotates the separation roller 1182 or the separation roller 11b2.

By forming a loop of the recording sheet 1 in this manner, the skew that occurs when the recording sheet 1 is separated is absorbed.

Next, the process moves from step S12 or step S13 to step S14, and the drive gear 9b is changed to the conveyance output gear 9c.
and transfer roller 2a and registration roller 1.
1c is rotated in the normal direction to convey the recording sheet 1 to the recording position which is the front position of the recording head door.

Next, the process proceeds to step S15, in which the recording hand door is operated, and the carry and motor 5dwotf+ are operated to perform recording.

After recording, the carriage 5 is returned to the left end position shown in FIG. 1 by the carriage motor 5d, and in step S16, the drive gear 9b is engaged with the conveyance output gear 9C, and the discharge roller 8a is rotated to remove the recording sheet 1 after recording. It is discharged to the discharge stacker 8e.

At this time, the convex portion 8e+ causes the lower end of the discharged recording sheet 1 to protrude toward the discharge roller 8a side, so that the recording sheet 1 is smoothly discharged, and the recording sheet 1 is aligned with the discharge stun force 8e.

Next, the process moves to step S17, where it is determined whether there is a recording command, and if there is a recording command (YES), the process returns to step SIO and the same operation is repeated. Furthermore, if there is no recording command (NO), recording ends.

In the recording operation described above, when the recording sheet 1 is fed from the same bin and the recording operation is repeated multiple times, the switching operation of the drive gear 9b is repeated several times, but the ASF input gear 91 is inputted with a play. Drive gear 9
i+ and input driven gear 912, recording sheet 1 is not fed from an unused bin, and recording sheet 1 is
There is no risk of jam etc.

[Other Examples]

Next, another embodiment of the present invention will be described.

(Recording Means) In addition to the above-mentioned combination of the ejection port and the liquid path electrothermal converter, the recording means is configured as described in US Pat. Showa 5
What is disclosed in 9-123670 etc. can also be adopted.

Further, the above-mentioned recording means is an example in which ink is supplied to the recording head from the ink cartridge 7f installed in the recording apparatus, but if an ink storage chamber is provided in the recording head and the ink in the ink storage chamber runs out, Alternatively, a disposable type recording head whose recording heads can be replaced may be used.

Furthermore, although the above-described embodiments have exemplified a serial type recording system, the present invention is not limited to the serial type, and can also be applied to a line type recording system.

Here, we will briefly explain the line-type Bubble Genoto recording method that allows full-color recording.

In FIG. 11, the recording sheet 1 is conveyed by an upstream conveyance roller 19a which is driven and rotated, pinch rollers 19b and 19c which are in pressure contact with this and driven to rotate, and a downstream conveyance roller 20a which is driven and rotated and which are in pressure contact and driven. It is configured to be able to be conveyed in the direction of arrow d by rotating pinch rollers 20b.

Between the upstream and downstream transport rollers 19a and 20d, four recording heads 21a and 2 are arranged so as to face the recording sheet 1.
1b, 21c, and 21d are arranged in order in the sheet conveyance direction from the flow side to the downstream side. The recording heads F21a to 21d are line-type bubble jet recording heads capable of recording over the entire width of the recording sheet 1, and ink is supplied to the recording nozzles 21a to 21d from ink cartridges and grooves (not shown). It is configured as follows. Blank ink is supplied to the recording head 21a, yellow ink is supplied to the recording throat 21b, magenta ink is supplied to the recording throat 21c, and cyan ink is supplied to the recording head 21d.
is configured to be driven based on a color signal corresponding to the supplied ink color, and to eject ink droplets from the nozzle.

Therefore, while conveying the recording sheet 1 in the direction of arrow d,
By driving each of the recording heads 21a to 21d in synchronization with the conveyance, full color recording can be performed on the recording sheet.

In addition, in FIG. 11, below the recording throat 21a,
A recovery system 22 is provided which performs ink ejection recovery processing by removing thickened ink, fixed ink, etc. from the ink ejection ports when recording is not performed or when there are nozzles that are not in use.

This recovery system 22 uses the recording sheet 1 when performing recovery processing.
Alternatively, the nozzles of each of the recording heads 21a to 21d can be opposed to each other. Note that the recording heads 21a~
・21d performs preheating at appropriate timing,
The number of times the ejection recovery process is activated is reduced.

Furthermore, the recording means of the present invention need not be limited to the above-mentioned Hubble Gesoto recording method. For example, there is a so-called thermal transfer recording method in which an ink sheet coated with heat-melting ink is heated in accordance with an image signal and the molten ink is transferred to a recording sheet L, and a so-called thermal transfer recording method in which a recording sheet L that develops color by heat is heated in accordance with an image signal. Various recording methods can be employed, such as a window thermal recording method and a so-called wire tod recording method in which recording is performed by hitting an ink ribbon with a wire according to an image signal.

Therefore, the recording head is not limited to the above-mentioned bubble jet head, and for example, a thermal head, a wire dot head, a daisy wheel nozzle, etc. can be used.

(Driving means) In the above-described embodiment, a case was shown in which the carriage 5 was used to switch the drive gear 9b, but the present invention is not limited to this, and a mechanism dedicated to switching the drive gear 9b may be provided. .

The recording device can be used not only as an image output terminal for information processing equipment such as a computer, but also as a copying device in combination with a reader, etc., and even as a facsimile device with transmitting and receiving functions. It is possible.

<Effects of the Invention> As described above, in the feeding device of the present invention, the gear for transmitting the driving force of the driving means to the feeding means is a first gear and a second gear provided coaxially with the first gear. It consists of two gears, and when the first gear rotates by a predetermined angle or more, the rotation is transmitted to the second gear, so when switching gears,
Even if the drive gear is rotated forward or reverse for meshing, this rotation is not transmitted to the feeding means, which prevents unnecessary feeding of the recording medium and eliminates the risk of jamming of the recording medium. .

Further, according to the recording apparatus of the present invention, since the recording medium is fed without fear of jamming, etc., good recording can be performed.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of a serial bubble jet recording device according to an embodiment of the present invention, FIG. 2 is an explanatory side cross-sectional view,
Fig. 3 is a perspective view showing the gear transmission mechanism portion of the drive means, Fig. 4 is a perspective view with the same part omitted, and Fig. 5 is a perspective view showing the ASF output gear and the ASF output gear.
An explanatory diagram showing the gear side connecting the SF, FIG. 6(a) is a surface view of the ASF input insert gear, FIG. 6(b) is an exploded perspective view of the same,
FIG. 7 is a block diagram of the control unit, FIG. 8 is a flowchart showing control details, FIG. 9 is an explanatory diagram of the configuration of the recording head, and FIGS. 10 (a) to (g) are explanatory diagrams of the bubble jet recording principle. FIG. 11 is a perspective view illustrating another embodiment of the recording means. 1 is a recording sheet, 2 is a sheet conveyance means, 2a is a conveyance roller, 2a+ is a roller shaft, 2bI is a front pinch roller
12bz is the rear pinch roller, 13 is the sheet pressing member,
4 is a platen, 5 is a carriage, 6 is a guide rail, 7
7a is a recording means, 7a is a heater port, 7b is an electrothermal converter, 7C is an electrode, 7d is a nozzle, 7d+ is an orifice, 7
e is the top plate, 7e is the supply port, 7f is the ink cartridge,
7g is a common liquid chamber, 8 is a discharge means, 8a is a discharge roller,
8b is a discharge pinch roller - 18c is a roller 19.8d
9 is a discharge gear, 9 is a drive means, 9a is a drive morph, 9b is a drive gear, 9b is a slide shaft, 9bz is an intermediate gear, 9
b3 is a gear, 9ba is a slide holder, 9bs is a protrusion,
9C is the conveyance output gear, 9d is the ASF output gear, 9e is the pump gear, 9f is the frame, 9g is the support shaft, 9h is the intermediate gear, 9i1! ASF input gear, 9i+ is input drive gear (first gear), 91 is input driven gear (second gear)
, 90i+ is a slit, 91) is a projection, 9012 is a gear portion, 9112 is a disc, 9212 is an engaging claw, 93i!
is a recess, 9412 is a stopper, 913 is a spring,
9j, 9, 91 is an intermediate gear, 10 is a recovery device, 10a
is a cap, 10b is a guide shaft, 10c is a cap carriage, 10c is a protrusion, 10d is a pump, 10e is a rail, 10f is a spring, 10g is a fixed shutter, 10h
is the pump cam, 11 is ASF, 11a is the front pin, llb
is the rear pin, 11a1.11b is the roller shaft, 11a2
．． 11b2 is a separation roller, 11a1.11b is a pressure plate, lla, 11b4 is a pressure spring, 11a1.1
1b. is the clutch gear, llc is the registration roller, lld is the upper roller, lie is the registration gear, 12 is the manual feed port,
13 is a tractor, 14a and 14b are left and right side walls, 15.1
6 is an upper guide plate, 17 is a transport path separation plate, 18 is a control means, 18a is a CPU, 18bl! ROM, 18c is RAM
, 18d is an interface, 19a is an upstream conveyance roller, 19b and pinch roller 120a are downstream conveyance rollers, 20b is a pinch roller, 121a to 21d are recording throats, and 22 is a recovery system.

Claims (6)

[Claims] (1) It has a plurality of transmission gears arranged on the same axis, and a drive gear that is movable on a drive shaft parallel to the axis and can be individually switched and meshed with the transmission gear, and the drive gear a driving means that selectively transmits driving force by meshing with one of the transmission gears, and a feeding means that selectively transmits driving force by the driving mechanism to feed the recording medium. , and a gear for transmitting the driving force of the driving means to the feeding means includes a first gear that meshes with the transmission gear, and a second gear that is provided coaxially with the first gear. . A feeding device characterized in that the rotation is transmitted to the second gear when the first gear rotates by a predetermined angle or more. (2) Claim (1) characterized in that an elastic member for return is interposed between the first gear and the second gear.
Feeding device as described. (3) the feeding device; a conveying means for conveying the recording medium fed by the feeding device to a recording position; and recording for recording an image on the recording medium conveyed to the recording position by the conveying means. A recording device comprising a means and the following. (4) The recording apparatus according to claim 3, wherein the recording apparatus employs an inkjet recording method in which the recording means records an image by discharging ink according to a signal. (5) The recording means of the inkjet recording method discharges ink using thermal energy, and is characterized in that it includes an electrothermal converter for generating the thermal energy. (4) Recording device as described. (6) In the recording device, the recording means energizes the electrothermal transducer in response to a signal, and the ink is ejected and an image is recorded by the growth of bubbles generated by the electrothermal transducer's heating exceeding film boiling. 4. The recording apparatus according to claim 3, which uses a bubble jet recording method.