JP2001162887A - Recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recorder capable of improving a sheet feeding accuracy, dealing with accelerating of the feeding and further improving a stopping accuracy by selectively power transmitting a pump from a motor for feeding a recording medium and reducing a load when fed at the sheet. SOLUTION: A delivery roller shaft 113 obtains a power from a drive motor for driving a conveying roller 114. A sun gear 2 is mounted at the shaft 113. A planetary gear 4 engaged with the gear 2 is mounted at a planetary lever 3 frictionally fixed to the shaft 113 to engage with or disengage from a pump drive gear 5 by the rotation of the lever 3. When the pump is driven, the lever 3 is rotated so that the gear 4 is engaged with the gear 5. Meanwhile, when the pump is non-driven, the lever 3 is rotated so that the gear 4 is separated from the gear 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a recording apparatus comprising a recording medium feeding device driven by a recording medium feeding motor, and a pump device using the recording medium feeding motor as a common driving source. About.

[0002]

2. Description of the Related Art A recording apparatus such as a printer includes a recording medium feeding device configured to be able to advance and retreat a recording sheet both forward and backward, a recording unit for executing recording, and a drive control unit for controlling the driving of these units. Provided roughly. Then, from the viewpoint of miniaturization, a configuration is adopted in which the recording medium feeding motor is commonly used as a drive source for not only the recording medium feeding device but also another pump device. Here, a specific example of the pump device will be described by taking an ink jet printer as an example. The pump device is a pump for discharging ink from an ink storage tank for a flushing operation of the ink jet printer. This pump is configured such that the forward and reverse rotations of the power switch between a pumping operation in which the tube is handled between the pump casing and a release operation in which the tube is not pressurized.

[0003]

Conventionally, however, the pump device has not been structured so as to selectively transmit power to the recording medium feeding motor, so that the load increases during paper feeding and the pump release load increases. There is a problem that it is difficult to cope with a decrease in paper feeding accuracy and a high-speed feeding also due to variations and the like. Further, when the paper feed is stopped, the paper feed train is returned by the spring clutch on the pump side, and there is a problem that the stop accuracy is reduced.

[0004] It is an object of the present invention to reduce the load during the paper feeding operation by enabling the pump device to selectively transmit power from a recording medium feeding motor, to improve the paper feeding accuracy and to cope with high speed feeding. It is an object of the present invention to provide a recording apparatus which can easily perform the stop and further improve the stop accuracy.

[0005]

According to a first aspect of the present invention, a recording medium feeding device driven by a recording medium feeding motor and the recording medium feeding motor are used in common. A recording device comprising a pump device serving as a driving source, wherein the recording medium feeding motor and the pump device are connected via a power transmission switching device, and the pump device is driven by the power transmission switching device. The state and the non-driving state are configured to be selectively switchable.

According to the present invention, the recording medium feeding motor and the pump device are connected via a power transmission switching device, and the pump device is selectively driven and non-driven by the power transmission switching device. , It is possible to reduce the load at the time of the paper feeding operation, to improve the paper feeding accuracy and to easily cope with the high-speed feeding, and to further improve the stopping accuracy.

According to a second aspect of the present invention, in the recording apparatus according to the first aspect, the power transmission switching device is fixed to a roller shaft driven by the power of a recording medium feeding motor. A sun gear, a planetary lever frictionally fixed to the roller shaft so as to be rotatable around the shaft, and attached to the planetary lever in mesh with the sun gear, and together by the rotation of the planetary lever. A planetary gear that moves on a circular orbit; and a planetary lever lock unit that restricts and locks the rotation of the planetary lever at a first position and a second position, wherein the planetary lever is the first The planetary gear is connected to the gear that drives the pump device when in the locked state at the position, and the connection to the pump is released when the planetary gear is out of the first position. That It is an butterfly.

According to the present invention, when the planetary lever is in the locked state at the first position, the planetary gear is connected to the gear driving the pump device, and is out of the first position. At this time, since the connection to the pump is released, the structure is simplified, and the pump device is selectively switched between the drive state and the non-drive state by the power transmission switching device. It can be operated by switching.

According to a third aspect of the present invention, in the second aspect, the planetary lever locking means is provided on a bottom portion of a carriage having a recording portion for performing recording on a recording material. When the carriage is in the recording area, the engagement state is released and the carriage is placed in a lock-on state in which the rotation of the planetary lever can be restricted, and the carriage is home. When it is in the position, it is provided so as to be in the engaged state and to be placed in a lock-off state permitting free rotation of the planetary lever. According to the present invention, the planetary lever locking means is provided on the first portion provided on the bottom of the carriage.
And the planetary lever locking means is operated by the operation of the carriage, so that the switching mechanism of the planetary lever locking means can be formed at low cost without providing a special mechanism. Here, the “lock on” state means that the planetary lever locking means is
It means that the planetary lever is in a lockable state,
The "locked-off" state means that the planetary lever locking means is in a state where the planetary lever cannot be locked.

[0010] According to a fourth aspect of the present invention, in the third aspect, the second component is provided on a bottom portion of the carriage.
A carriage lock position for locking the carriage to the home position by engaging with a stopper portion of
A carriage lock lever displaceable from a carriage unlock position where the lock is released, wherein the roller shaft is
A discharge roller shaft for discharging a recording material on which recording has been performed by a recording unit, wherein the carriage lock lever is frictionally fixed to the discharge roller shaft together with the planetary lever, and the rotation of the discharge roller shaft The locked position and the unlocked position are displaced. According to the present invention, both the planetary lever and the carriage lock lever are frictionally fixed to the paper discharge roller shaft, and each of them is simultaneously rotated by the rotation of the paper discharge roller shaft. By using a common mounting structure, the planetary lever and the carriage lock lever can be provided at low cost. That is, since the functions of the planetary lever and the carriage lock lever are switched by being displaced, a mechanism for displacing them is necessary.According to the present invention, both are attached to the discharge roller shaft, Since the function is switched by the rotation of the discharge roller shaft, both parts can be arranged at low cost without increasing the drive transmission system.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the friction fixing includes:
It is characterized by being realized by a spring clutch. According to the present invention, since the friction fixing is realized by the spring clutch, the friction fixing can be performed easily at low cost.

According to a sixth aspect of the present invention, in any one of the third to fifth aspects, a rotation angle α at which the carriage lock lever rotates from the locked position to the unlocked position is determined by: The carriage lock lever and the planetary lever are configured such that a relationship of α <β is established between the planetary lever and a rotation angle β at which the planetary lever rotates from the second position to the first position. It is characterized by having. According to the present invention, the relationship α <β is established between the rotation angle α at which the carriage lock lever should rotate and the rotation angle β at which the planetary lever should rotate. Can be performed independently, and the following operational effects can be obtained. That is, when the user wants to perform the recording operation by displacing the carriage lock lever from the lock position to the unlock position and retracting the carriage, but does not want to drive the pump device due to the paper feeding load, the carriage lock is required. When the angle at which the lever and the planetary lever should rotate is the same, in a state where the carriage lock lever has rotated to the unlock position of the carriage,
The planetary lever also rotates and the planetary gear is connected to the pump device, and the pump device is driven to generate a paper feeding load. However, according to the present invention, such a problem can be avoided because there is a relationship of α <β between the rotation angle α of the carriage lock lever and the rotation angle β of the planetary lever.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Schematic Configuration of Ink Jet Printer] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an ink jet printer (hereinafter, abbreviated as “printer”) 100 as a recording apparatus according to an embodiment of the present invention. First, FIG.
The schematic configuration of the printer 100 will be described with reference to FIG. The printer 100 has side frames 107 and 10
8 and a main frame 109, a discharge frame 112 is disposed between the side frames 107 and 108, and a middle frame 111 is disposed below the discharge frame 112. Each component of the printer 100 is disposed. Reference numeral 110 indicates a pump frame to which a pump device 116 described later is attached.

The paper P is fed from the rear of the apparatus by a paper feeding device (not shown) (installed at the rear of the printer 100), and is conveyed to the bottom of the carriage 101 at a constant pitch by a conveying roller 114 located in the middle of the apparatus. It is sent to the installed recording head unit (not shown). The sheet P on which recording has been performed by the recording head unit (not shown) is discharged toward the front of the apparatus by a discharge roller (not shown). Reference numeral 113 denotes a discharge roller shaft to which the discharge roller is attached, and the discharge roller shaft 113 is disposed below the discharge frame 112 as shown in the drawing.

A carriage 101 carries an ink cartridge 102, and ink is supplied from the ink cartridge 102 to the recording head unit. Carriage 10
1 reciprocates in the main scanning direction while being guided by a carriage shaft 117 suspended between the side frames 107 and 108. A carriage motor 103 installed on the main frame 109 and a drive pulley 10 attached to a rotation shaft of the carriage motor 103 shown in FIG.
5, free-rotatable driven pulley 106, drive pulley 10
The drive belt 104 suspended between the drive belt 5 and the driven pulley 106 constitutes a drive system for reciprocating the carriage 101 in the main scanning direction.

A drive motor 115 as a "recording medium feeding motor" for driving the transport roller 114 is mounted on the frame 108, and the transport roller 11 is driven by a gear mechanism (not shown) on the frame 108 side.
4, the gear mechanism also transmits power to the discharge roller shaft 113. Discharge roller shaft 113 that is powered by drive motor 115
Is a space 1 located on the right side of the middle frame 111.
Power is also transmitted to the pump device 116 by a power transmission switching device (not shown in FIG. 1; described later in detail) installed in the device 11a. In other words, the pump device 116 can be connected to the drive motor 115 via the power transmission switching device. Therefore, the transport roller 114, the discharge roller shaft 113, and the pump device 11
6 uses the drive motor 115 as a common drive source.

This pump device 116 is a pump frame 1
It is attached to the right side of 10 and has a function of eliminating clogging of a recording head (not shown) by being connected to the capping unit 118. That is, when the carriage 101 is at the home position, the capping unit 118 seals the recording head (not shown),
In this state, by receiving a supply of negative pressure from the pump device 116, ink is forcibly ejected from a recording head unit (not shown) at the time of ink filling or clogging. In the driving state, the pump device 116 performs the pumping operation and the releasing operation by the forward / reverse rotation of the discharge roller shaft 113, that is, the forward / reverse rotation of the drive motor 115. [Configuration of power transmission switching device] Printer 10 according to the present invention
The zero pump device 116 is configured to be selectively switchable between a driving state and a non-driving state by a power transmission switching device, thereby reducing the load on the driving motor 115 due to driving the pump device 116. And transport roller 1
It is possible to improve the paper feeding accuracy and to respond to high-speed paper feeding by using, or to improve the stopping accuracy of the transport roller 114. Hereinafter, the configuration of the power transmission switching device (hereinafter, abbreviated as “switching device”) that realizes this function will be described in detail with reference to FIGS. 2 to 6. 2 is a front view of the switching device (a view of the middle frame 111 in FIG. 1 as viewed in the direction of the arrow x). FIG. 3 is a developed view of gears constituting the switching device (the middle frame 111 and the pump frame in FIG. 1). 110 is a view in the direction of the arrow z, in which gears denoted by reference numerals 4 to 7 are developed). 4 is an operation explanatory diagram of a later-described "planetary lever", FIG. 5 is an exploded perspective view of main parts of the switching device, and FIG. 6 is an operational explanatory diagram of a "planetary lock lever". In FIG. 4 and subsequent figures, for simplification of the drawing and convenience of explanation, some components of the switching device are extracted and drawn.

The switching device includes a discharge roller shaft 113, a group of gears that rotate and mesh with the discharge roller shaft 113, and "planetary lever lock means" for restricting rotation of some of the gears. , And is roughly composed of First, the outline of the gear group will be described with reference to FIGS.
The switching device operates the drive motor 115 (hereinafter referred to as “PF”) as described above.
The motor further receives power from a discharge roller shaft 113 which rotates by receiving the power of a “motor”, and a pump drive gear fixed to a drive shaft (not shown) of a pump device 116 via a gear mechanism. 7 to drive the pump device 116 (hereinafter simply referred to as “pump device”). More specifically, the sun gear 2 is attached and fixed to the discharge roller shaft 113, and the discharge roller shaft 11
The rotation of 3 causes the sun gear 2 to rotate. On the other hand, the planetary lever 3 is frictionally fixed to the paper discharge roller shaft 113 (to be described in detail later), and the planetary gear 4 is
The planetary gear 4 is moved in a circumferential orbit together with the rotation of the planetary lever 3. A pump transmission gear 5 that can mesh with the planetary gear 4 and a reduction gear 6 that moves integrally with the pump transmission gear 5 are attached to the middle frame 111. Therefore, when power is transmitted to the pump device, the sun gear 2, the planetary gear 4, the pump transmission gear 5, the reduction gear 6,
The gears are meshed in the order of the pump drive gear 7 to transmit power. That is, the planetary gear 4 is connected to the pump drive gear 7, and power is transmitted from the PF motor.

Next, the configuration and operation of the planetary lever 3 will be described with reference to FIG. The planetary gear 4 is attached to the planetary lever 3 as described above. The planetary lever 3 itself is disposed on the front side (x direction side in FIG. 1) of the sun gear 2 and is frictionally fixed by a spring clutch to be described later so as to rotate in accordance with the rotation of the paper discharge roller shaft 113. I have. When the planetary lever 3 rotates, the planetary gear 4 displaces its position, thereby switching between the meshing position with the pump transmission gear 5 and the non-meshing position. 4A and 4B show the state of the switching, wherein FIG. 4A shows a meshing state between the pump transmission gear 5 and the planetary gear 4, and FIG. 4B shows a non-meshing state. That is, the meshing state of the planetary gears 4 shown in FIG. 3A is the driving state of the pump device, and this is the “first position” of the planetary lever 3. Further, the non-meshing state of the planetary gear 4 shown in FIG. 2B is the non-driving state of the pump device, and this is the “second position” of the planetary lever 3. In a second position where the planetary gear 4 is not meshed with the pump transmission gear 5 (the state shown in FIG. 4B), if the planetary gear 4 is meshed with a gear of another drive system, Power can also be transmitted to the drive system.

A first locking recess 3a and a second locking recess 3b are formed on the outer periphery of the planetary lever 3, as shown in the figure. The first locking concave portion 3a and the second locking concave portion 3b are engaged with a planetary lock lever 12 as "planet lever locking means" described later, and the planetary lock lever 12 causes the planetary lever 3 to rotate.
Plays the role of locking the rotation of. The planetary lever 3
FIG. 4A shows a state in which the planetary gear 4 is meshed with the first locking concave portion 3a in FIG. The state is controlled by a control sequence to be described later so as to rotate by the fixed amount of rotation angle β in FIG.

Next, returning to FIGS. 2 and 3, the structure and operation of the carriage lock lever 8 will be described. A carriage lock lever (hereinafter abbreviated as “CR lock lever”) 8 is disposed on the near side of the planetary lever 3 (in the x direction in FIG. 1). The CR lock lever 8 has a lever shape extending outward from both sides of the paper discharge roller shaft 113 as a center of rotation, and the paper discharge roller shaft 113 together with the aforementioned planetary lever 3 by a spring clutch described later.
Is fixed by friction so as to rotate in accordance with the rotation of. The CR lock lever 8 is displaced between a locked position where the carriage 101 is locked to the home position by rotation and an unlocked position where the lock is released. That is, the carriage 10
A stopper 101a as a “second stopper” that engages with the CR lock lever 8 is formed on the bottom of the first lock lever 1 (refer to FIG. 1 for the formation position of the stopper 101a in the main scanning direction). 8 is a discharge frame 1
12 by projecting upward from the stopper portion 101.
a, and locks the carriage 101 at the home position. Accordingly, FIG. 2 shows a state in which the CR lock lever 8 is at a lock position for locking the carriage 101 to the home position. From this lock position, the CR lock lever 8 rotates counterclockwise, and When the protruding state is released, the lock is released to the unlocked position.

Next, referring to FIG.
The mounting structure of the planetary lock lever 12 and the CR lock lever 8, in particular, friction fixing by a spring clutch will be described in detail. As shown in FIG. 5, the protruding end of the discharge roller shaft 113 has a small diameter, and is attached to the small diameter portion 113a so that the CR lock lever 8, the planetary lever 3, and the sun gear 2 do not fall off by the E-ring 11. Can be Among them, as described above, only the sun gear 2 is fixedly attached to the paper discharge roller shaft 113, and is always rotated when the paper discharge roller shaft 113 rotates. That is, the rotation torque of the paper discharge roller shaft 113 is ensured by the half-moon-shaped portion 113b formed at the protruding end of the paper discharge roller shaft 113 and the semi-lunar hole 2a of the sun gear 2 being fitted. Is transmitted. On the other hand, in the CR lock lever 8 and the planetary lever 3, the small-diameter portion 113a of the discharge roller shaft 113 is inserted through the insertion holes 8a and 3c, respectively.
The small-diameter portion 113a is attached so as to be able to idle in the insides a and 3c.

A disc spring 9 is provided between the CR lock lever 8 and the planetary lever 3. The disc spring 9 generates a separation force in the axial direction of the paper discharge roller shaft 113 between the CR lock lever 8 and the planetary lever 3, thereby constituting a spring clutch mechanism. That is, the planetary lever 3 is pressed in the direction of the sun gear 2 by the disc spring 9. Since the sun gear 2 always rotates by the rotation of the paper discharge roller shaft 113, the rotational force of the sun gear 2 is transmitted to the planetary lever 3 by the pressing force. On the other hand, the disc spring 9 rotates in accordance with the rotation of the planetary lever 3, and its rotational power is transmitted to the CR lock lever 8
To communicate. Therefore, the CR lock lever 8 is connected to the planetary lever 3
And it rotates according to the disc spring 9. However, since these are merely transmissions of the turning force by the pressing force of the disc spring 9, both the CR lock lever 8 and the planetary lever 3 are once discharged by the means for restricting the rotation, and thereafter discharged. The small diameter portion 1 does not rotate in accordance with the rotation of the paper roller shaft 113 and is inserted in the insertion holes 8a and 3c.
13a only idles. Therefore, this is the disc spring 9
, Ie, frictional fixing by the spring clutch effect. The friction means (elastic means) capable of exerting such a spring clutch effect is not limited to the disc spring 9, but may be, for example, a compression coil spring as indicated by reference numeral 9a or a washer 10 , 10 may be an elastic material (for example, sponge, rubber, etc.) as indicated by reference numeral 9b.

Next, the structure and operation of the planetary lock lever 12 as "planetary lever locking means" will be described with reference to FIGS. As shown in FIG.
The planetary lock lever 12 is disposed slightly forward of the printer 100 from the paper discharge roller shaft 113. As shown in FIG. 5, the planetary lock lever 12 is mounted by inserting the lower part of the planetary lock lever 12 inside the mounting projections 111a, 111a formed so as to protrude from the middle frame 111. The formed rotation projections 13, 13
By fitting them into fitting holes 111b, 111b formed in the mounting projections 111a, 111a.
Therefore, this causes the planetary lock lever 12 to rotate the rotation projection 1.
The upper part swings around the pivots 3 and 13 (the middle frame 1
11 (approach / separate from 11). A hook 15 for hooking one end of a return spring 16 is formed on the planetary lock lever 12, and the other end of the return spring 16 is hooked on the middle frame 111, whereby the planetary lock lever 12 always moves toward the middle frame 111. Mounted to receive the returned spring force. Reference numeral 17
Is a projection for restricting the rotation of the planetary lock lever 12 toward the middle frame 111 by the return spring 16, and the rotation of the planetary lock lever 12 is stopped by the projection 17 abutting against the middle frame 111. (See FIG. 6B).

The planetary lock lever 12 has the middle frame 1
An arm 12a is formed such that an upper portion thereof extends toward the planetary lever 3 when attached to the arm 11, and a lock pin 14 is formed at the tip of the arm 12a as shown in the figure. The lock pin 14 is provided with the first locking recess 3a or the second locking recess 3b of the planetary lever 3 described above.
The free rotation of the planetary lever 3 is regulated by the fitting. In the middle of the arm portion 12a, a projection 1 projecting upward is provided.
8 are formed. The protrusion 18 is provided with a stopper 101a as a “first stopper” at the bottom of the carriage.
Is to be engaged. FIG. 6 shows this state. FIG. 6A shows the state in which the projection 18 and the stopper 101a are engaged, and the planetary lock lever 12 is
11 shows a state in which it has been pushed down to the side away from 11.
(A) shows a state in which the carriage 101 is located at the home position, and the left side is a print area.

When the planetary lock lever 12 is pushed down as shown in FIG. 6A, the lock pin 14 is connected to the first locking recess 3a or the second locking recess 3b formed on the outer periphery of the planetary lever 3. Is released, and the planetary lever 3 is allowed to rotate freely. On the other hand, as shown in FIG. 6B, the carriage 101 moves to the printing area side, and the stopper 101
In the state where the engagement state between the a and the projection 18 is released, the lock pin 14 is engaged with the first engagement recess 3 a or the second engagement recess 3 b formed on the outer periphery of the planetary lever 3. This allows the rotation of the planetary lever 3 to be locked. Hereinafter, regardless of whether the lock pin 14 is fitted into the first locking recess 3a or the second locking recess 3b, the planetary lock lever 12 is
The state of being pushed down by the (stopper unit 101a) is referred to as a “lock-off state”, and the carriage 101 (stopper unit 101a).
The state in which it is not pushed down and is drawn toward the middle frame 111 by the spring force of the return spring 16 is referred to as a “lock-on state”.

The stopper 101a provided on the bottom of the carriage 101 includes a "second stopper" to which the CR lock lever 8 is engaged, and a planetary lock lever 12
Are also used as both of the “first stopper portion” with which the first stopper engages. Accordingly, since each dedicated stopper is not provided at the bottom of the carriage 101, the carriage 1
01 is reduced. Note that a part (for example, a side wall) of the main body of the carriage 101 may be used without providing the stopper portion 101a as in the present embodiment.
The above is the outline of the configuration of the switching device and the operation of each component.

[Control Sequence] Next, FIGS.
Printer 1 while referring to FIG.
The various control sequences of 00 will be described. 7 to 10 are flowcharts of various control sequences.
A lock sequence of the carriage 101, a lock release sequence of the carriage 101, a shift sequence to the drive mode of the pump device, and a drive mode release sequence of the pump device are shown, respectively. FIG. 11 is a front view (operation transition diagram) of a main part of the switching device for explaining the drive mode release sequence of the pump device shown in FIG.
2 is a timing chart of each component when the drive mode release sequence of the pump device is executed. FIG. 7
10 are stored in a ROM (not shown) constituting a control unit (not shown) of the printer 100, and are placed in an executable state as appropriate.

First, referring to FIG.
1 will be described. First, in step 201, the CR lock set flag On / Of is set.
Determine f. The CR lock set flag is a flag indicating whether or not the carriage 101 is currently locked at the home position. If the flag is OFF, the carriage 101 is determined to be in the print area.
If the CR lock set flag is Off, step 2
At 02, the carriage 101 is moved to the home position. Next, the PF motor is reversed by m steps.
Here, the PF motor is a stepping motor, and m
The rotation angle of the motor drive shaft during step rotation depends on the specifications of each stepping motor. In the present embodiment, the PF
The motor rotates 0.405 deg / step, and m
= 125 is adopted. The “reverse rotation” is a rotation direction for displacing the CR lock lever 8 to the lock position, that is, the paper discharge roller shaft 113 locks the CR lock lever 8 to the lock position by the “reverse rotation” of the PF motor. This is the direction of rotation for displacement. Accordingly, the clockwise rotation in FIG. 2 is “reverse rotation”, and the counterclockwise rotation is “forward rotation”.
Becomes Hereinafter, in all control sequences, “forward rotation” and “reverse rotation” refer to the rotation direction. When the PF motor rotates in the reverse direction in step 203, the CR lock lever 8 projects to a position above the sheet discharge frame 112 (the state shown in FIG. 2), and the carriage 101 is locked at the home position. Then, in step 204, the CR lock set flag is set to On, and the carriage lock is completed.

On the other hand, to release the carriage lock,
The sequence shown in FIG. 8 is executed. First, step 30
At 1, the On / Off state of the CR lock set flag is determined. If the CR lock set flag is On, CR
It is determined that the lock lever 8 has protruded from the paper discharge frame 112, and the carriage PF is moved to the home position in step 302, and the PF motor is rotated forward by m steps in step 303. . By the forward rotation of the PF motor, the discharge roller shaft 1
13 rotates counterclockwise as shown in FIG. 2, and the CR lock lever 8 is displaced to the unlocked position. Then, the CR lock set flag is turned off, and the carriage lock release is completed.

Next, a sequence for shifting the pump device to the drive mode will be described with reference to FIG. During the printing operation, the pump device is switched to the non-driving state, whereby the load on the PF motor is reduced, and a more reliable transport operation is performed. From this state,
The transition to the drive mode of the pump device is performed as follows.
First, in step 401, it is determined whether or not the Pump mode flag is On. The Pump mode flag is a flag indicating whether the pump device is currently in a driving state or a non-driving state. If the Pump mode flag is Off, it is determined that the pump device is in a non-driving state. After the carriage 101 is moved to the home position in step 403, the PF motor is rotated forward by n steps in step 403. Here, the reason why the carriage 101 is moved to the home position is to lock the planetary lock lever 12 by the stopper portion 101a formed at the bottom of the carriage 101 and allow the planetary lever 3 to freely rotate. . Then, by rotating the PF motor forward in this state, the planetary lever 3 rotates counterclockwise as shown in FIG. 2, the planetary gear 4 meshes with the pump transmission gear 5, and the rotational power of the PF motor is reduced by the pump device. Is transmitted to In the present embodiment, n = 250
It has become. Then, in step 404, Pum
After setting the p-mode flag to On, step 405
In step, the carriage 101 is retracted toward the print area.
Thereby, the lock state of the planetary lock lever 12 is brought into the lock-on state as shown in FIG. 6B, and the lock pin 14 is fitted into the first locking recess 3a of the planetary lever 3 and is fixed in the pump drive mode. .

Next, the drive mode release sequence of the pump device will be described with reference to the flow chart shown in FIG. 10 and the operation transition diagram shown in FIG. 11 and the timing chart shown in FIG. 12 as appropriate. The drive mode release sequence of the pump device is an operation for releasing the drive mode of the pump device and performing the paper feeding operation with the load on the PF motor reduced.

First, in step 501, the carriage 101 is moved to the home position, and the planetary lock lever 12 is securely locked off.
02, the PF motor is reversed by k steps (FIG. 1)
2 (1) section). The state of the main part of the switching device after the reverse of k steps is as shown in FIG. The operation of each component at this time is as shown in the section (1) of FIG.
The planetary lever 3 rotates, and the first locking concave portion 3a located vertically above the planetary lever 3 is displaced downward, and the second
The locking recess 3b is displaced upward, so that the second locking recess 3b becomes a position to be locked by the planetary lock lever 12 (the state of FIG. 4B). That is, the planetary gear 4 that transmits power to the pump device releases the meshing state with the pump transmission gear 5, and the CR lock lever 8 rotates from the unlocked position to the locked position. In the present embodiment, k
= 400.

Next, after setting the CR lock set flag to On in step 503, a CR lock release sequence is executed in step 504. The CR lock release sequence in step 504 is a series of sequences shown in FIG. That is, the PF motor is rotated forward by m steps. The state in which step 504 is completed is the state shown in FIG. 11B, in which the CR lock lever 8 is rotated to unlock the carriage 101 as shown in the figure. At this time, as shown in a section (2) of FIG. 12, when the CR lock lever 8 rotates, the planetary lever 3 is rotated.
Also rotates at the same time, but when the CR lock lever 8 is switched to the unlocked state of the carriage 101, the planetary lever 3 is not switched from the second state to the first state, and during the displacement process. It will be in a stopped state.
This is because the rotation angle α (the angle at which the CR lock lever 8 rotates from the state shown in FIG. 11A to the state shown in FIG. 11B) for displacing the carriage 101 from the locked position to the unlocked position is changed. The CR lock lever 8 and the planetary lever 3 are configured and mounted so that the rotation angle β required for the planetary lever 3 to be displaced from the second position to the first position is smaller than the rotation angle β. It is. As a result, even if the carriage 101 is retracted to the print area side in a later step and the planetary lock lever 12 is in the lock-on state, the planetary lever 3 is kept in the meshing position (the first position) between the planetary gear 4 and the pump transmission gear 5. ), The pump device does not remain in the driven state even if the carriage 101 moves to the printing operation.

From this state, in step 505, the carriage 101 is retracted toward the print area. FIG.
(C) shows a state after the carriage 101 is retracted. As shown in the drawing, when the carriage 101 is retracted, the planetary lock lever 12 is turned on and the lock pin 14 of the planetary lock lever 12 is locked.
Abuts on the planetary lever 3 and the projection 18 is
2 is in a state of being displaced upward. However, in this state, as shown in FIG.
Does not engage with any of the locking recesses of the planetary lever 3 and is simply in a lockable state (lock-on state) of the planetary lever 3. The timing chart at this time corresponds to the section (3) in FIG.

Then, from this state, in step 506, the PF motor is reversed by j steps. The state after the reverse rotation of the PF motor is the state shown in FIG. As shown in the drawing, the reverse rotation of the PF motor causes the CR lock lever 8 to be displaced to the lock position again, and the planetary lever 3 to rotate, so that the lock pin 14 engages with the second locking concave portion 3b, and the planetary lever 3 is locked. It will be in the state that was done. Accordingly, the load on the PF motor can be reduced without the planetary gear 4 meshing with the pump transmission gear 5 even during the printing operation. The timing chart at this time corresponds to the section (4) in FIG. In the present embodiment, j = 145.

Next, in step 507, the PF motor is rotated forward by m steps to displace the CR lock lever 8 to the unlocked position (section (5) in FIG. 12). After returning to the position (section (6) in FIG. 12), the pump mode flag is turned off in step 509, and the driving mode release sequence of the pump device ends. It should be noted that each control sequence shown in the present embodiment is merely an example, and it goes without saying that an optimal control sequence can be appropriately adopted.

[0038]

According to the present invention, the recording medium feeding motor and the pump device are connected via a power transmission switching device, and the pump device is driven and non-driven by the power transmission switching device. Since it is configured to be selectively switchable, it is possible to reduce the load during the paper feeding operation, to improve the paper feeding accuracy and to easily cope with high-speed feeding, and to further improve the stopping accuracy.

[Brief description of the drawings]

FIG. 1 is a perspective view of an ink jet printer according to the present invention.

FIG. 2 is a front view of the power transmission switching device.

FIG. 3 is a plan view of the power transmission switching device, showing a state where each gear constituting the power transmission switching device is expanded.

FIG. 4A is a front view of a main part of the power transmission switching device, showing a meshing state between a planetary gear and a pump transmission gear, and FIG. 4B showing a non-meshing state.

FIG. 5 is an exploded perspective view of a main part of the power transmission switching device.

FIG. 6A is a side view of a main part of the power transmission switching device, showing a state in which the planetary lever locking means is in an unlocked position, and FIG.

FIG. 7 is a flowchart illustrating a lock sequence of the carriage.

FIG. 8 is a flowchart showing a carriage unlock sequence.

FIG. 9 is a flowchart showing a transition sequence of the pump device to a drive mode.

FIG. 10 is a flowchart showing a drive mode release sequence of the pump device.

11 is a front view showing a state of a main part of the power transmission switching device after completion of each step in FIG. 10;

FIG. 12 is a timing chart of each component when a drive mode release sequence of the pump device is executed.

[Explanation of symbols]

 2 Sun gear 3 Planetary lever 3a First locking concave portion 3b Second locking concave portion 4 Planetary gear 5 Pump transmission gear 6 Reduction gear 7 Pump drive gear 8 CR lock lever 9 Belleville spring 12 Planetary lock lever 14 Lock pin 16 Return spring 18 Projection 100 Ink jet printer 101 Carriage 101a Stopper 110 Pump frame 111 Medium frame 112 Paper discharge frame 113 Paper discharge roller shaft 115 Drive motor (PF motor) 116 Pump device

Claims (6)

[Claims] 1. A recording apparatus comprising: a recording medium feeding device driven by a recording medium feeding motor; and a pump device using the recording medium feeding motor as a common driving source. The motor for driving and the pump device are connected via a power transmission switching device, and the pump device is configured to be selectively switchable between a driving state and a non-driving state by the power transmission switching device. Recording device. 2. The power transmission switching device according to claim 1, wherein the power transmission switching device comprises: a sun gear fixed to a roller shaft driven by the power of a recording medium feeding motor; and the roller shaft rotatable around the shaft. A planetary gear that is frictionally fixed to the planetary gear; a planetary gear that is attached to the planetary lever in mesh with the sun gear, and that moves together on a circumferential orbit by rotation of the planetary lever; and a rotation of the planetary lever. Planetary lever locking means for restricting and locking the movement at a first position and a second position, and a gear for driving the pump device when the planetary lever is locked at the first position. Wherein the planetary gear is connected to the pump, and when the planetary gear is out of the first position, the connection to the pump is released. 3. The apparatus according to claim 2, wherein the planetary lever locking means is configured to be able to engage with a first stopper provided on a bottom of a carriage provided with a recording unit for performing recording on a recording material, and When the carriage is in the recording area, the engaged state is released and the planetary lever is placed in a lock-on state capable of restricting the rotation of the planetary lever. When the carriage is at the home position, the engaged state is determined. The recording apparatus is provided so as to be placed in a lock-off state in which the planetary lever is allowed to freely rotate in a state. 4. A carriage lock position for locking the carriage to a home position by engaging a second stopper provided on a bottom of the carriage, and a carriage unlock position for releasing the lock according to claim 3. And a carriage lock lever capable of displacing the recording medium, wherein the roller shaft is a paper discharge roller shaft for attaching a paper discharge roller for discharging a recording material on which recording has been performed by a recording unit, and wherein the carriage lock lever is the planetary gear. A recording apparatus, wherein the recording device is frictionally fixed to the paper discharge roller shaft together with a lever, and is displaced between the locked position and the unlocked position by rotation of the paper discharge roller shaft. 5. The recording apparatus according to claim 1, wherein the friction fixing is realized by a spring clutch. 6. The apparatus according to claim 3, wherein the carriage lock lever is rotated from the lock position to the unlock position, and the planetary lever is moved to the second position. The carriage lock lever and the planetary lever are configured so that a relationship of α <β is established between the carriage lock lever and the planetary lever from the rotation angle β to the first position.