JP2003074587A - Clutch structure, paper feeder and recorder with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the clutch structure and the recorder capable of disconnecting without reverse rotation of a motor and simplifying a paper feeder sequence and improving the throughput. SOLUTION: A gear 9, a first rotary member, rotating in interlocking movement with a paper feeder roller 7 is connected/disconnected to/from a gear 6, a second rotary member rotated by the driving force of the motor by the motion of trigger lever 12 rotated by the movement of a carriage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch mechanism, a paper feeding device and a recording device equipped with the clutch mechanism.

[0002]

2. Description of the Related Art Conventionally, in a sheet feeding device of an ink jet type recording apparatus, a recording sheet is fed from a sheet feeding roller having a substantially D-shaped side view to a sheet feeding roller, and the leading end of the recording sheet is fed. After being delivered to the roller, the drive of the paper feed roller is stopped and the drive of the paper feed roller is continued,
A mechanism is used to feed the paper to the transport path where the recording head is located. Further, in a small-sized sheet feeding device, in order to reduce the size and cost of the device, it is devised that a single drive motor can perform the required operation of these two rollers.

Specifically, a power transmission mechanism such as a gear train or a belt mechanism for transmitting the driving force from a single drive motor to the paper feed roller and the paper feed roller is provided, and the paper feed roller is provided in the power transmission mechanism. A clutch mechanism for connecting and disconnecting the driving force to the engaging gear is provided. In this clutch mechanism, a ratchet mechanism is provided on the gear that drives the paper feed roller, and the gear is
When it makes one rotation, a separately provided trigger lever engages with one member that constitutes the ratchet mechanism to release the engagement between the member and the gear by the ratchet mechanism, so that the paper feed roller does not rotate any more. I have to.

[0004]

However, in the conventional clutch mechanism, the drive motor is reversely rotated in order to cause the trigger lever to perform the operation of releasing the engagement between the member of the ratchet mechanism and the gear. Then, the operation of releasing the engagement is performed. Therefore, there is a problem that the sheet feeding sequence of the sheet feeding device becomes complicated, the time required for sheet feeding becomes long, and the throughput decreases.

An object of the present invention is to disengage the engagement without rotating the motor in the reverse direction, thus simplifying the paper feeding sequence and improving the throughput, a clutch mechanism provided with the clutch mechanism, and the paper feeding device. It is to provide a recording apparatus including a paper device.

[0006]

In order to achieve the above object, the clutch mechanism according to the invention described in claim 1 of the present application,
A clutch mechanism for engaging and disengaging a first rotating member that rotates in conjunction with a sheet feeding roller and a second rotating member that rotates by a driving force of a motor by operating a trigger lever, wherein the trigger lever is a carriage It is characterized in that the engagement of the first and second rotating members is interrupted by the movement by movement.

According to the present invention, the trigger lever is rotated or slid by the movement of the carriage to intermittently engage or disengage the first and second rotating members, so that the motor is rotated in the reverse direction. Without this, the engagement of the first and second rotating members can be interrupted. Therefore, the sequence is not complicated and the throughput can be improved.

The invention according to claim 2 of the present application is the clutch mechanism according to claim 1, characterized in that the first rotating member and the second rotating member are engaged by a ratchet mechanism. It is what According to the present invention, the engagement between the first rotating member and the second rotating member can be interrupted with a simple configuration.

The invention according to claim 3 of the present application is the clutch mechanism according to claim 1 or 2, wherein the trigger lever is formed with a locking hook at one end, and the trigger lever moves to cause the movement of the trigger lever. The engagement hook engages or disengages the first rotating member or the second rotating member to interrupt the engagement of the first and second rotating members. Is. According to the present invention, the engagement between the first rotating member and the second rotating member can be interrupted with a simple configuration.

The invention according to claim 4 of the present application is characterized in that, in the clutch mechanism according to any one of claims 1 to 3, the clutch mechanism is a one-rotation clutch. . According to the present invention, the clutch mechanism can be engaged and disengaged each time the paper feed roller rotates once, and the mechanism can be simplified.

According to a fifth aspect of the present invention, in the clutch mechanism according to any one of the first to fourth aspects, the trigger lever has a predetermined end of one sheet from the sheet feed roller. The first rotating member and the second rotating member are engaged when they are separated by a distance of. According to the present invention, the distance between the end of the first sheet and the end of the second sheet can be set to the minimum distance required for position detection, and the throughput can be improved.

The sheet feeding device according to the invention of claim 6 of the present application comprises the clutch mechanism according to any one of claims 1 to 5. According to the present invention, since it is not necessary to reverse the motor in order to operate the clutch mechanism, it is possible to obtain a sheet feeding device in which the sequence is not complicated and the throughput is improved.

According to a seventh aspect of the present invention, there is provided a recording apparatus in which a sheet feeding roller is rotated to feed one sheet from a set sheet, and a sheet feeding apparatus feeds the sheet. And a paper feed function unit having a paper feed roller for feeding the paper in the sub-scanning direction under the control of the feed amount, and a carriage equipped with the recording head reciprocates in the main scanning direction to face the recording head. It is arranged between a recording execution unit that executes recording based on recording data on a sheet, and a sheet feeding roller of the sheet feeding device and a sheet feeding roller of the sheet feeding function unit, and can detect the leading edge and trailing edge of the sheet. A paper detector is provided, and a predetermined amount of paper feeding operation in the sub-scanning direction by the paper feeding function unit and a recording execution operation for the stopped paper by the recording execution unit are alternately performed to execute all recording. A recording device 2. The paper feeding device, wherein the first rotating member is a member that rotates together with the paper feeding roller, and the second rotating member is a member that rotates together with the paper feeding roller. It is characterized by comprising the clutch mechanism described in any one of (1) to (5).

According to the present invention, the power of the motor for rotating the paper feed roller is also used as the power source of the paper feed roller, and the power transmission is interrupted by the clutch mechanism. Since it is not necessary to reverse the motor by rotating the motor in the paper feed direction in the normal direction to operate the clutch mechanism of the apparatus, the sequence is not complicated and a recording apparatus capable of improving the throughput can be obtained.

Further, in the invention described in claim 8 of the present application, in the recording apparatus according to claim 7, the recording execution unit is a position which becomes a basis of each operation of the carriage,
The carriage has a home position located on the one-digit side of recording, a standby position located on the multi-digit side of recording, and a trigger position located outside the standby position. It is executed by reciprocating between both turning points between the standby positions,
The intermittent operation of the clutch mechanism is executed by moving the carriage from the home position side to the trigger position and pushing the trigger lever to shift the clutch from the power non-transmission state to the power transmission state. It is characterized in that it is configured.

According to the present invention, the home position, the standby position, and the trigger position are provided as the base positions for each operation of the carriage, and the carriage can be easily moved to these positions in the reciprocating operation. The intended operation can be executed. The intermittent operation of the clutch mechanism in the paper feeding device can be easily realized by bringing the carriage to the trigger position provided outside the standby position.

Further, in the invention described in claim 9 of the present application, in the recording apparatus according to claim 8, the intermittent operation of the clutch mechanism is set to the home position and the standby state before the completion of recording on one sheet. By setting one of the reciprocating movements of the carriage for executing the recording between the positions to the standby position as the operation for executing the recording while moving beyond the standby position to the trigger position. It is characterized in that it is configured to be executed.

According to the present invention, before the end of recording on one sheet, one of the reciprocating movements of the carriage for recording is moved toward the standby position, and the trigger is passed beyond the standby position. Since it is possible to set the operation to execute recording while moving to the position, that is, the clutch can be moved to the power transmission state (engaged state) in a series of recording operations, so the next paper can be transferred without waiting for the end of recording. Can start feeding. Therefore, the feeding of the next paper can be started at a fast timing before the end of the printing of the paper, and the throughput of the printing apparatus can be improved.

Further, in the invention described in claim 10 of the present application, in the recording apparatus according to claim 9, the intermittent operation of the clutch mechanism is such that the leading edge of the sheet of known size passes through the sheet detector and the leading edge of the sheet is passed. The end position of the paper is calculated and grasped based on the detection and the paper size, and the calculated paper end position is separated from the next paper in the calculation through the paper feeding operation, and the paper end is the paper detector. The carriage is configured to move from the home position side to the trigger position and push the trigger lever before reaching the detection position.

According to the present invention, in comparison with the conventional configuration in which the feeding of the next sheet is started after the trailing edge of the first sheet has passed the detection position of the sheet detector. Since the feeding of the next paper is started before the end of the first paper reaches the detection position of the paper detector, the throughput of the recording apparatus can be greatly improved.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a clutch mechanism according to an embodiment of the present invention, and the clutch mechanism is mounted on a sheet feeding device of an inkjet printer.

This ink jet printer rotates a paper feed roller 7 to feed one by one from a set of sheets, and a sheet fed from the sheet feeder in the sub-scanning direction. A paper feed function unit having a paper feed roller that feeds paper under control of the feed amount and a carriage equipped with a recording head are reciprocally moved in the main scanning direction to perform recording based on recording data on a sheet facing the recording head. And a paper detector that is arranged between the paper feed roller 7 of the paper feed device and the paper feed roller of the paper feed function unit and that can detect the leading edge and trailing edge of the sheet. There is. Then, it is configured such that a predetermined amount of paper feeding operation in the sub-scanning direction by the paper feeding function portion and a recording execution operation for the stopped paper by the recording execution portion are alternately performed to execute all recording. There is. The above configuration is a conventionally known configuration, and thus detailed description thereof is omitted.

In the present embodiment, as schematically shown in FIG. 8, the recording execution unit sets the position that is the basis of each operation of the carriage as a position on the first digit side (the right end side in FIG. 1) of the recording. , A standby position located on the multi-digit side of recording (the left end side in FIG. 1), and a trigger position located outside the standby position. Then, the recording execution operation is executed by the carriage reciprocating between the two turning points between the home position and the standby position.

In FIG. 1, a gear unit 1 is composed of a gear 1a and a gear 1b, which are coaxially fixed and have different diameters, and a central axis of which is rotatably supported by a frame 2 of a sheet feeding device. A gear (not shown) whose power is transmitted via a belt mechanism (not shown) meshes with the gear 1a, and a driving force from a paper feeding motor (not shown) is transmitted. The driving force of the motor is transmitted to a paper feed roller (not shown) via the belt mechanism.

The gear 1b meshes with the gear 3 which is a sun gear, and the central axis 31 of the gear 3 is planted in the frame 2. The gear 3 is rotatably supported by the central shaft 31. The central shaft 31 is fitted in a hole 41 of the planetary mechanism 4, and the planetary mechanism 4 is rotatably supported by the central shaft 31 about the hole 41. The planetary gear mechanism 4 has a substantially L-shaped plate portion 42 having the hole 41 as a center, and one end portion 42a of the plate portion 42.
And a planetary gear 44 rotatably supported by the support shaft 43.

The gear 3 meshes with a gear 5 and a planetary gear 44, which are rotatably supported on a support shaft (not shown) that is erected on the frame 2. The gear 5 meshes with a gear 6 as a second rotating member. The gear 6 rotates integrally with the paper feed roller and has a side view substantially D.
It is rotatably loosely fitted to a reduced diameter tip portion 81 of a sheet feeding shaft 8 to which a die sheet feeding roller 7 is fixed. Ratchet teeth 61 having a smaller diameter than the gear 6 are formed on the end surface of the gear 6 on the frame 2 side.

The tip 81 of the paper feed shaft 8 is rotatably fitted in a hole (not shown) formed in the frame 2. On the side of the feed roller 7 near the frame 2 of the tip portion 81, the first
A gear 9 as a rotating member is fixed to the tip 81 so as to rotate integrally with the paper feed shaft 8. A shaft 91 is erected on the end surface of the gear 9 on the gear 6 side, and is inserted between the gear 9 and the gear 6, and the gear 9 side of the hollow disk portion 10b of the annular body 10 also serving as the first rotating member. Is inserted into the annular portion 101 provided on the end surface of the. On the other hand, the gear 6 of the gear 9
Another shaft 92 is erected on the side end surface, and one end of the spring 11 is suspended on the shaft 92. The other end of the spring 11 is suspended on a shaft 102 that is erected on the end face of the hollow disk portion 10b of the annular body 10 on the gear 9 side. That is, the annular body 10 can rotate about the shaft 91, and at the same time, it is biased by the spring 11 in the clockwise direction when viewed from the right side of FIG.

On the inner surface of the cylindrical portion 10a of the annular body 10 on the gear 6 side, a projection 103 which engages with the ratchet teeth 61 of the gear 6 is formed.
Is raised. In addition, the hollow disk portion 10 of the annular body 10
On the surface of the gear b side of b, a locking piece 104 is provided in a protruding manner.

A trigger lever 12 is loosely fitted on a shaft 21 projecting on the frame 2. An annular portion 121 is projected on the upper part of the trigger lever 12, and a torsion is provided on the annular portion 121. The spring 13 is wound. The end portion of the trigger lever 12 provided with the locking hook 122 is constantly urged toward the frame 2 by the torsion spring 13. The other end portion 123 of the trigger lever 12 projects into the print area from an opening (not shown) provided in a main frame (partition wall) (not shown) that divides the print area and the paper feeding area of the frame 2, and the carriage (not shown) is shown in FIG. When moved to the trigger position (see FIG. 8) adjacent to the frame 2, the pushing portion of the carriage pushes in the leftward direction in FIG.

Next, the structure of the present embodiment having such a configuration will be described while explaining the operation thereof. 2 is a perspective view of the state before the operation of the clutch mechanism according to the present embodiment before the operation is started, in which the mutual positional relationship among the ratchet teeth 61, the cylindrical portion 10a and the gear 9 is seen through from the right side of FIG. It is a schematic diagram. FIG. 3 is a plan view of this state viewed from above.

As shown in FIGS. 2 and 3, in this state, the trigger lever 12 is parallel to the gear 9 by the biasing force of the torsion spring 13, and the trigger lever 1
The locking hook 122 at the tip of the second cylindrical portion 10a of the annular body 10
Is engaged with the locking piece 104 of. Therefore, the cylindrical portion 10
2a is pulled up to the upper left in FIG. 2 against the biasing force of the spring 11, and the projection 103 is in a state of being separated from the ratchet teeth 61. In this state, even if the driving force is transmitted from the motor (not shown) to the gear device 1, the gear 1 of the gear device 1
Rotational force of the gear device 1 is transmitted through the gear b, the gear 3, and the gear 5 to rotate the gear 6, but the ratchet teeth 61 and the protrusion 103 of the cylindrical portion 10a are separated from each other.
0 does not rotate, and therefore the gear 9 integrally engaged with the annular body 10 also does not rotate, so that the paper feed shaft 8 integrally fixed to the gear 9 also does not rotate. At this time, needless to say, the paper feed roller rotates. In this state, the planetary gear mechanism 4 is in a state in which the planetary gear 44 is separated from the gear 9 as shown in FIG.

In this state, when sheets are stacked and placed on a hopper portion (not shown) of the sheet feeding device, and a print start signal is supplied to the ink jet printer having the sheet feeding device provided with the clutch mechanism of this embodiment. The carriage (not shown) moves from the home position on the right side of FIG. 1 to the trigger position near the frame 2 at the left end of FIG. 1 (see FIG. 8). At this time, the end 123 of the trigger lever 12 is pressed by the pressing portion of the carriage, the trigger lever 12 rotates around the annular portion 121 against the urging force of the torsion spring 13, and the locking hook 122 has an annular shape. The body 10 is disengaged from the engagement position with the locking piece 104, and is moved above the gear 6 as shown in the plan view of FIG.

In this state, the locking hook 122 and the locking piece 10
As shown in FIG. 6, the positional relationship between the ratchet teeth 61, the cylindrical portion 10a and the gear 9 is seen from the right side of FIG. As described above, the annular body 10 is pulled to the lower right in FIG. 6 by the urging force of the spring 11, and the protrusion 103 causes the ratchet teeth 61
And the clutch mechanism is engaged.

Therefore, the driving force of the motor is transmitted to the ratchet teeth 61 via the gear 1b, the gear 3, the gear 5 and the gear 6 of the gear device 1, and the ratchet teeth 61 are connected to the cylindrical portion 10a.
The engagement of the projections 103 of the ratchet teeth 61 and the projections 1 when the motor drives the gears 6 so that the gears 6 rotate clockwise when viewed from the right side of FIG.
The annular body 10 is rotated in the clockwise direction by the ratchet mechanism composed of 03 and 03. Since the shaft 91 of the gear 9 is fitted into the annular portion 101 of the annular body 10, the gear 9 is also attached to the annular body 1.
0, and therefore the paper feed shaft 8 integrally fixed to the gear 9 also rotates clockwise.

With the rotation of the paper feed shaft 8, the paper feed roller 7 integrally fixed to the paper feed shaft 8 also rotates clockwise, and the conveyance of the paper is started in the direction of the paper feed roller that is also rotating. To be done. With the rotation of the annular body 10, the locking piece 104 on the hollow disk portion 10b also rotates, and the locking hook 12 of the trigger lever 12 is rotated.
Even if 2 returns onto the cylindrical portion 10a, it moves to a position where it does not engage with the locking hook 122. In the present embodiment, after the paper feed shaft 8 rotates about 45 degrees, the carriage moves to the standby position slightly to the right of the trigger position, and the printing operation is started after the conveyance of the paper and the arrival of the print data. It has become. The movement of the carriage is controlled by a control circuit (not shown) of the printer.

The paper feed roller 7 rotates in the paper feed direction to continue the conveyance of the paper, and is arranged between the paper feed roller 7 and the paper feed roller to detect the passage of the leading edge and the trailing edge of the paper. A paper detector (not shown) accurately grasps the leading end position of the paper by the paper conveyance control system of the printer, and the paper is moved to the predetermined position at the paper feed roller position.

When the paper is conveyed by the paper feed roller 7 toward the paper feed roller, the paper may be conveyed in an inclined state with respect to the paper feed roller. In such a case, so-called skew removal can be performed.

That is, although the trigger lever 12 is returned to the upper portion of the cylindrical portion 10a as shown in FIG. 3, the locking hook 122 is not in the engaged state with the locking piece 104, and therefore, As shown in FIG. 6, the projection 103 is engaged with the ratchet teeth 61, and the clutch mechanism is in the connected state.
However, since the protrusion 103 and the ratchet teeth 61 form a ratchet mechanism, when the gear 6 rotates in the clockwise direction (paper feeding direction), the rotational force of the gear 6 is transmitted to the annular body 10, but in the opposite direction. When rotating in the (counterclockwise) direction, the rotational force of the gear 6 is not transmitted to the annular body 10, and therefore the paper feed roller 7 does not rotate in the reverse direction.

As described above, when the motor is reversely rotated in the paper returning direction to reverse the paper feed roller, the paper feed roller 7
Since the power is not transmitted to the paper feed roller 7, the paper feed roller 7 is stopped. That is, since only the paper feed roller is rotated in the reverse direction while the paper feed roller 7 is stopped, it is possible to form a bend necessary for removing the skew at the leading edge of the paper, and to rotate the paper feed roller in the normal direction again. Skew removal is performed by changing.

Here, the planetary gear mechanism 4 will be described. There may be a case where an operation such as releasing (lowering and retracting) the hopper of the sheet feeding device is made shortly after the end of printing, and in the present embodiment, the hopper is released via the cam mechanism by operating the sheet feeding roller in the reverse direction. Is configured. Therefore, when this hopper release is executed, it is necessary to reverse the paper feed roller and the paper feed roller by reversing the motor. in this case,
By simply reversing the paper feed roller, as described above,
Power is not transmitted to the paper feed roller side via the clutch mechanism. Further, in a normal state (the carriage is located at a position other than the trigger position), the planetary restriction portion 1 of the trigger lever 12 is
Since the rotation of the plate portion 42 is restricted by 24, the power of the planetary gear 44 is not transmitted to the gear 9. Therefore, the hopper cannot be released.

Therefore, in the present embodiment, prior to the reverse rotation of the paper feed roller by the reverse rotation of the motor, the carriage is brought to the trigger position, whereby the trigger lever 12 is rotated and the operation restriction state of the planetary mechanism 4 is reached. Is released so that the plate portion 42 of the planetary mechanism 4 can be rotated counterclockwise. Then, by rotating the motor in the reverse direction, the plate portion 42 of the planetary mechanism 4 is rotated counterclockwise, and the planetary gear 44 is brought into mesh with the gear 9, whereby the reverse rotation driving force of the paper feed roller is generated. The hopper release can be executed by reversing the sheet feeding roller 7.

That is, since the driving force of the motor for rotating the paper feed roller 7 in the reverse direction rotates the gear 3 in the counterclockwise direction, the planetary gear 44 of the planetary mechanism 4 is lifted while being rotated in the clockwise direction. The portion 42 rotates counterclockwise about the hole 41, and the planetary gear 44 meshes with the gear 9 as shown in FIG. 7. As a result, the counterclockwise rotational force of the gear 3 is transmitted to the gear 9 as the clockwise rotational force of the planetary gear 44, and the gear 9 rotates counterclockwise.
Therefore, the paper feeding roller 7 can rotate counterclockwise to release the hopper of the paper feeding device.

After the deskewing operation, the paper is started to be conveyed by the paper feed roller for recording. After that, when the annular body 10 makes one rotation, the locking piece 104 on the hollow disk portion 10b returns to the engagement position with the locking hook 122 of the trigger lever 12, and at this time, the trigger lever 12 has already moved onto the cylindrical portion 10a. Since it has returned, the trigger lever 12
2, the locking hook 122 and the locking piece 104 are engaged with each other, and the cylindrical portion 10a is pulled up to the upper left in FIG. 2 against the biasing force of the spring 11, and the projection 103 and the ratchet tooth 61 are pulled. Is disengaged and the clutch mechanism is disengaged. That is, the clockwise rotation force of the gear 6 is not transmitted to the annular body 10 by the clutch mechanism including the one-rotation clutch, the gear 9 stops rotating, and therefore the paper feeding shaft 8 and the paper feeding roller 7 also rotate. Stop.

At this time, in the planetary mechanism 4, the plate portion 42 rotates clockwise around the hole 41 by the clockwise rotation of the gear 3 and the planetary gear 44 is disengaged from the gear 9 as shown in FIG. In this state, no rotational force is transmitted to the gear 9. In this state, the paper is conveyed by the paper feed roller and the normal printing operation based on the print data is performed.

Next, paper feeding for continuous printing of several pages will be described. The end position of the sheet is calculated from the sheet size data previously input by the control circuit to the sheet conveyance control system based on the grasp of the sheet front end position by the sheet detector. In the present embodiment, when the calculated paper end passes through the position of the paper feed shaft 8 and then reaches the position where the paper rear end is about 15 mm away from the paper feed shaft 8, that is, the paper end is When a paper conveyance control operation is performed to separate the leading edge of the next paper by a predetermined distance, the carriage moves to the trigger position while performing a recording operation from the home position side, and the trigger lever 12
The end portion 123 of is pressed to the left in FIG. Then, the locking hook 122 of the trigger lever 12 rotates in the direction of the gear 6 to release the engagement between the locking hook 122 and the locking piece 104, the clutch mechanism is connected by the above-described operation, and the locking mechanism moves in the sub-scanning direction. 1
Along with the line feed (paper feed operation), the paper feed roller 7 starts rotating in the clockwise direction to start the paper feed operation of the next paper.

At this time, the first sheet is still being conveyed by the paper feed roller, and the second sheet is continuously printed while the first sheet is printed without rotating the motor in the reverse direction. Since the sheet feeding can be started in the direction of the feed roller, the throughput can be improved.

When the first sheet of paper is not printed up to the final position of the printing range of the sheet and the printing is finished in the middle and the rest is left as a margin, the sheet is conveyed by 1 after the printing is completed. It is configured to perform a series of paper discharge operations instead of line-by-line print operations. In this embodiment, in this case as well, as in the normal printing operation,
When the rear end position of the first sheet reaches a position about 15 mm away from the paper feed shaft 8, the carriage moves to the trigger position, and the engagement between the hook 122 and the hook 104 is released. The clutch mechanism is connected by the above-described operation, and the paper feed roller 7 starts to rotate in the clockwise direction to start the paper feed operation of the next paper.

Needless to say, the gap between the end position of the first sheet and the tip position of the second sheet is not limited to 15 mm, and can be set to an appropriate interval in design. Further, the transmission of the driving force of the motor to the gear device 1 may be performed by using a belt mechanism or a transmission mechanism of the driving force by a gear train. Further, in the present embodiment, the number of gear trains is three, that is, the gear device 1, the gear 3, and the gear 5, but it goes without saying that the number of gear trains is not limited to this. Further, in the present embodiment, the rotary type trigger lever is used, but a slide type or other type of moving lever can be used as well.

[0049]

As described above, according to the clutch mechanism of the present invention, when the trigger lever is rotated by the movement of the carriage, the first rotating member and the motor which rotate in conjunction with the sheet feeding roller are rotated. The second rotating by the driving force of
Since the engagement of the rotating member is intermittent, the engagement of the first and second rotating members can be intermittent without rotating the motor in the reverse direction, the sequence is not complicated, and the clutch mechanism capable of improving the throughput is provided. can get.

Further, according to the recording apparatus of the present invention, the recording apparatus is provided with the clutch mechanism which can be engaged and disengaged without rotating the motor in the reverse direction, so that the recording apparatus having a high sequence and a high throughput can be obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a clutch mechanism according to an embodiment of the present invention.

FIG. 2 shows the state before the operation of the clutch mechanism of FIG.
It is the schematic diagram which looked through the mutual positional relationship of the ratchet tooth, the cylindrical part, and the part of a gearwheel from the right side of FIG.

FIG. 3 is a plan view of the state of FIG. 2 seen from above.

FIG. 4 is a side view of an essential part of the planetary gear of the clutch mechanism of FIG. 1 viewed from the right side in a state in which the planetary gear is separated from a gear fixed to a sheet feeding roller.

5 is a plan view showing a state where a trigger lever of the clutch mechanism of FIG. 1 is rotated rightward. FIG.

FIG. 6 is a schematic view of the mutual positional relationship of the ratchet teeth, the cylindrical portion, and the gear portion of the clutch mechanism of FIG. 1 in a connected state, seen from the right side of FIG.

FIG. 7 is a side view of the essential parts of the planetary gear of the clutch mechanism of FIG. 1 as viewed from the right side in a state in which the planetary gear meshes with the gear fixed to the paper feed roller.

FIG. 8 is a schematic configuration diagram showing the positions of the carriage of the recording apparatus according to the present invention that are the basis of each operation.

[Explanation of symbols]

6 gears (second rotating member) 7 Paper feed roller 9 gears (first rotating member) 10 ring 12 Trigger lever 61 ratchet teeth 103 protrusion 104 Locking piece 122 Locking hook

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masashi Furuyama             Seiko, 3-3-3 Yamato, Suwa City, Nagano Prefecture             -In Epson Corporation F-term (reference) 2C058 AB08 AC07 AC11 AD01 AE02                       AE09 AF04 AF29 GC01                 3F343 FA01 FB03 FB04 FC01 FC03                       GA01 GB01 GC01 GD01 HA33                       JA03 KB05 LC04 LC23 LD24                       LD25 LD26                 3J056 AA08 AA63 BA04 DA04 GA02                       GA11

Claims (10)

[Claims] 1. A clutch mechanism for engaging and disengaging a first rotating member that rotates in conjunction with a paper feed roller and a second rotating member that rotates by a driving force of a motor by operating a trigger lever. A clutch mechanism characterized in that the trigger lever is moved by the movement of a carriage to intermittently engage and disengage the first and second rotating members. 2. The clutch mechanism according to claim 1, wherein the first rotating member and the second rotating member are engaged by a ratchet mechanism. 3. The trigger lever according to claim 1 or 2, wherein a locking hook is formed at one end of the trigger lever, and the locking hook is moved by the movement of the trigger lever to cause the locking hook to move to the first rotating member or the second rotating member. A clutch mechanism characterized in that the engagement of the first and second rotating members is interrupted by engaging with or disengaging from. 4. The clutch mechanism according to claim 1, wherein the clutch mechanism is a one-turn clutch. 5. The trigger lever according to claim 1, wherein when the trailing end of one sheet is separated from the sheet feeding roller by a predetermined distance, the trigger lever and the second rotating member are provided. A clutch mechanism characterized by engaging a rotating member. 6. A sheet feeding device comprising the clutch mechanism according to claim 1. Description: 7. A paper feeding device for rotating a paper feeding roller to feed a plurality of papers set one by one, and a feeding amount of the papers fed from the paper feeding device in a sub-scanning direction. A paper feed function unit having a paper feed roller for feeding paper below, and a carriage having a print head reciprocally moved in the main scanning direction to perform print based on print data on a paper facing the print head. And a paper detector that is disposed between the paper feed roller of the paper feeding device and the paper feed roller of the paper feed function unit and that can detect the leading edge and trailing edge of the sheet. Is a recording apparatus that performs a total amount of recording by alternately performing a predetermined amount of paper feeding operation in the sub-scanning direction by the recording execution operation and a recording execution operation of the recording execution unit with respect to the paper in a stopped state, wherein the paper feeding device is In front of the first rotating member The clutch mechanism according to any one of claims 1 to 5, wherein the second rotating member is a member that rotates integrally with the paper feeding roller, and the second rotating member is a member that rotates integrally with the paper feeding roller. A recording device characterized by comprising. 8. The recording execution unit according to claim 7,
The carriage has a home position located on the one-digit side of recording, a standby position located on the multi-digit side of recording, and a trigger position located outside the standby position, as positions that are the basis of each operation of the carriage. The recording execution operation is performed by the carriage reciprocating between the two folding points between the home position and the standby position, and the intermittent operation of the clutch mechanism moves the carriage from the home position side to the trigger position. Then, the recording apparatus is configured to be executed by shifting the clutch from a power non-transmission state to a power transmission state by pressing the trigger lever. 9. The intermittent operation of the clutch mechanism according to claim 8, which is one of reciprocating operations of a carriage for performing recording between the home position and the standby position before the end of recording on one sheet. A recording apparatus configured to be executed by setting one operation of moving toward the standby position to an operation of executing recording while moving from the standby position to the trigger position. . 10. The intermittent operation of the clutch mechanism according to claim 9, wherein the leading edge of the sheet of known size passes a sheet detector, and the end position of the sheet is calculated by calculation based on the leading edge detection and the sheet size. The carriage is moved from the home position side from the home position side before the paper end position thus obtained is separated from the next paper in calculation through the paper feeding operation and the paper end reaches the detection position of the paper detector. A recording apparatus, wherein the recording apparatus is configured so that it can be set to move to a trigger position and push the trigger lever.