JP4753015B2 - Clutch device, recording device - Google Patents

Description

  In the present invention, the first rotating body and the second rotating body are provided so as to be coaxially rotatable, a gear provided on the first rotating body, a protrusion provided on the second rotating body, The present invention relates to a clutch device in which a lever member performs engagement / release of the power to transmit power intermittently, and a recording apparatus including the clutch device.

  Conventionally, as a clutch device in which a lever member performs engagement / release of a gear provided on a first rotating body and a protrusion provided on a second rotating body to transmit power intermittently, Patent Document 1 What has been described in is proposed. The clutch device is required when a plurality of devices are controlled by a drive motor as one power source. For example, in a recording apparatus, there are cases where a feeding roller and a conveying roller are rotated by the power of one drive motor. At this time, not only the case where both the feed roller and the transport roller are rotated simultaneously, but also the case where only the transport roller needs to be rotated occurs. Therefore, in order to cut the power transmission to the feeding roller and transmit the power only to the conveying roller, a clutch device that intermittently transmits the power of the drive motor using a lever member is provided. An example of a conventional clutch device is shown in FIG.

  As shown in FIG. 10, the conventional clutch device 400 includes a first rotating body 410, a second rotating body 420, and a lever member 430. Among these, the first rotating body 410 includes a first gear 411 to which power is transmitted from the drive gear 435 and a claw wheel 412 formed integrally with the first gear 411. On the other hand, the second rotating body 420 swings around a base 436 that is coaxially rotatable with the first rotating body 410, a clutch shaft 422 provided on the base, and the clutch shaft 422. And a clutch portion 421. Further, the clutch portion 421 is formed with a projection portion 423 that engages with the claw wheel 412 and a clutch claw portion 424 that engages with a lever member 430 described later. Further, the clutch portion 421 is biased by a spring (not shown) from the projection portion 423 toward the claw wheel 412 so that the projection portion 423 engages with the claw wheel 412.

  The lever member 430 is provided so as to be able to contact and separate from the first rotating body 410 and the second rotating body 420 with the lever shaft 431 as a fulcrum. A second gear 434 to which power is transmitted from the drive gear 435 and a torque limiter (not shown) that transmits only a certain rotational force or less of the rotational force of the second gear 434 to the lever member 430 coaxially with the lever shaft 431. )). The lever member 430 is formed with a lever claw portion 432 that engages with the clutch claw portion 424. Next, the operation of the conventional clutch device 400 will be described.

  FIG. 10A shows a state where the engagement between the projection 423 of the clutch portion 421 and the ratchet wheel 412 is released and the feeding roller (not shown) is stopped at the reset position. FIG. 5B shows a state where the drive gear 435 is driven in reverse from the state shown in FIG. Further, (C) in the figure shows a state in which the drive gear 435 is driven to rotate forward from the state of (B), and (D) in FIG. This is the state immediately before returning to the state.

  First, the state shown in FIG. When the drive gear 435 is driven to rotate in the counterclockwise direction, the first gear 411 that is the first rotating body 410 rotates in the clockwise direction. At this time, since the hook wheel 412 is formed integrally with the first gear 411, it rotates in the clockwise direction in the same manner as the first gear 411. On the other hand, on the lever member side, when the drive gear 435 is driven to rotate in the counterclockwise direction, the second gear 434 rotates in the clockwise direction. Then, the torque limiter generates a clockwise rotational force about the lever shaft 431 on the lever member 430. The lever claw portion 432 engages with the clutch claw portion 424, and the lever member 430 moves the clutch portion 421 to the right side of the base 436 against the biasing force of the spring, that is, the clutch shaft 422 is a fulcrum. The engagement between the projection 423 and the ratchet wheel 412 is released by moving it counterclockwise. Accordingly, since power is not transmitted from the ratchet wheel 412 to the protrusion 423, the feed roller shaft 433 formed integrally with the second rotating body 420 is stopped without rotating.

  Next, as shown in FIG. 10B, when the drive gear 435 is driven to rotate backward in the clockwise direction, the lever member 430 rotates counterclockwise by the action of the torque limiter. At this time, since the lever claw portion 432 and the clutch claw portion 424 are disengaged, the clutch portion 421 supports the clutch shaft 422 by a spring that biases the clutch portion 421 from the projection portion 423 toward the claw wheel 412. Oscillate clockwise. Therefore, the protrusion 423 of the clutch part 421 and the ratchet wheel 412 are engaged. Although the first gear 411 and the claw wheel 412 rotate counterclockwise, the protrusion 423 is pushed up by the claw teeth of the claw wheel 412 and gets over the claw teeth with a “click” sound. Accordingly, the clutch portion 421 is configured not to reverse in the counterclockwise direction even if the hook wheel 412 rotates in the counterclockwise direction.

Subsequently, as shown in FIG. 10C, when the drive gear 435 is driven to rotate in the counterclockwise direction from the reverse drive state of (B), the first gear 411 and the ratchet wheel 412 rotate in the clockwise direction. At this time, the claw teeth of the claw wheel 412 are formed so as not to push up the protrusion 423. Accordingly, the ratchet wheel 412 and the protrusion 423 are engaged, and the ratchet wheel 412 rotates the clutch part 421 and the base body 436 in the clockwise direction. That is, the first rotating body 410 and the second rotating body 420 are integrally rotated in the clockwise direction. Since the second rotating body 420 is formed integrally with the feeding roller shaft 433, the feeding roller (not shown) also rotates in the clockwise direction.
On the other hand, as for the lever member 430, when the drive gear 435 is driven to rotate in the counterclockwise direction, as described above, a rotational force in the clockwise direction is generated with the lever shaft 431 as a fulcrum. Accordingly, the lever claw portion 432 is in a state of waiting for the clutch claw portion 424 to make a full turn in the clockwise direction and engage with the clutch claw portion 424 again. Furthermore, when the drive gear 435 is driven to rotate forward from the state shown in FIG. 10C, the state shown in FIG.

  As shown in FIG. 10D, when the second rotating body 420 further rotates from the state of (C), the clutch pawl portion 424 engages with the lever pawl portion 432. At this time, in the clutch pawl portion 424 that is one end side of the clutch portion 421, the rotation is restricted by the lever pawl portion 432. On the other hand, in the clutch shaft 422 which is the other end side of the clutch portion 421, the first rotating body 410 and the second rotating body 420 are united in the clockwise direction by the engagement of the ratchet wheel 412 and the protrusion 423. Try to rotate clockwise. That is, even if the lever claw portion 432 and the clutch claw portion 424 are engaged, the base 436 rotates in the clockwise direction. More specifically, after the lever claw portion 432 is engaged with the clutch claw portion 424, the clutch portion 421 is clutched against the spring biasing force as the second rotating body 420 gradually rotates clockwise. The shaft 422 is gradually swung counterclockwise about the fulcrum. For this reason, the engagement between the ratchet wheel 412 and the protrusion 423 is gradually released. Then, when the engagement between the ratchet wheel 412 and the protrusion 423 is released, power transmission from the first rotating body 410 to the second rotating body 420 is cut off, and the second rotating body 420 and the supply of power are cut off. The feeding roller stops and returns to the state (A) again.

Japanese Unexamined Patent Application Publication No. 2004-35862 (Japanese Patent Application No. 2004-139438)

  However, in the conventional structure, when the clutch claw portion 424 is engaged with the stopped lever claw portion 432, the clutch portion is used with the clutch shaft 422 as a fulcrum by utilizing the rotational force of the second rotating body 420. The engagement between the protrusion 423 and the claw wheel 412 is gradually released by gradually swinging the 421. In other words, when the transmission of power from the claw wheel 412 that is the first rotating body 410 to the protrusion 423 of the clutch portion 421 that is the second rotating body 420 is cut off, the clutch shaft 422 of the clutch portion 421 is supported as a fulcrum. The oscillating motion stops. Therefore, the clutch portion 421 may stop at an intermediate point of the stroke of the clutch pawl portion 424, that is, immediately before the engagement between the projection portion 423 and the ratchet wheel 412 is released. At this time, the halfway state immediately before the engagement is completely released is maintained, and there is a possibility that the protrusion 423 may get over the claw teeth of the claw wheel 412 while generating a “click” sound.

  Further, when the engagement between the protrusion 423 and the ratchet wheel 412 is released, the moving speed of the clutch part 421 is determined by the rotating speed of the second rotating body 420. For example, when the rotating speed of the second rotating body 420 is low, the moving speed of the clutch pawl portion 424 is also low. Therefore, when the engagement between the protrusion 423 and the ratchet wheel 412 is released, if the clutch portion 421 moves slowly and the engagement is released slowly, a halfway just before the engagement is completely released. Since the state is maintained for a long time, the protrusion 423 may get over the claw teeth of the claw wheel 412 while generating a “click” sound.

  Further, when trying to reduce the size with the conventional structure, a harmful effect occurs. If all the members are simply reduced, the height of the claw teeth of the claw wheel 412 and the height of the protruding portion 423 are also reduced, so that there is a possibility that the strength necessary for engagement cannot be maintained. Therefore, the height of the claw teeth of the claw wheel 412 and the height of the protruding portion 423 need to be set to a certain level or more.

In the conventional structure, the lever ratio between the projecting portion 423 that is the operating point from the clutch shaft 422 that is the fulcrum and the clutch pawl portion 424 that is the power point from the fulcrum is configured to be similar to the lever principle. Therefore, in order to move the protrusion 423 by the height at the operating point, a stroke having a length obtained by multiplying the height of the protrusion 423 by the lever ratio is necessary at the power point. In other words, if the height of the protrusion 423 is set to a certain level or more, it is necessary to multiply the height of the protrusion 423 by the lever ratio to increase the stroke of the clutch pawl 424 as a power point. However, in practice, it is difficult and limited to make the entire clutch device small while maintaining the function and to provide only the stroke of the clutch pawl portion 424.
The present invention has been made in view of such a situation, and an object of the present invention is to provide a clutch device that can reliably cut the power from the first rotating body to the second rotating body. is there.

  To achieve the above object, according to a first aspect of the present invention, a first rotating body and a second rotating body are provided so as to be rotatable coaxially, and the first rotating body is provided on the first rotating body. A clutch device that engages and disengages a gear and a protrusion provided on a second rotating body and transmits power of a driving gear intermittently and transmits the power of a driving gear, the outer peripheral edge of the second rotating body A first concave portion provided on the second rotating body, a clutch portion provided on the second rotating body side and movable with respect to the second rotating body, and the projecting portion provided on the first rotating body. An urging means for urging the clutch portion in a direction to engage with the gear; and an action portion provided on the lever member and capable of pressing the clutch portion, the drive gear, the first When the action portion is opposed to the first recess due to normal rotation of the rotator and the second rotator, the action Is a clutch device, characterized in that by pressing the clutch portion to release the engagement between the protrusion and the first gear.

According to the first aspect of the present invention, the action portion of the lever member presses the clutch portion to release the engagement between the gear and the protrusion when facing the first recess. In other words, the lever member rotates when the action portion faces the first recess. And the clutch part can be pressed and moved by the rotation stroke of the action part of the lever member. That is, since a sufficient rotation stroke of the action portion can be easily provided, the engagement between the protrusion provided on the clutch portion and the first gear can be reliably released. As a result, it is possible to prevent the occurrence of a “ticking” sound when the protrusion gets over the teeth of the first gear without being completely released from the engagement.
Furthermore, the timing at which the action portion presses the clutch portion can be easily set according to the size and position of the first recess. Further, depending on the shape of the first recess, it is possible to set the speed at which the clutch portion pressed by the action portion moves regardless of the rotation speed of the second rotating body. is there.

According to a second aspect of the present invention, in the first aspect, a second gear that rotates integrally with the first gear is formed on the first rotating body, and the second gear is The clutch device is configured such that power is transmitted by a driving gear.
According to the second aspect of the present invention, in addition to the same effect as the first aspect, the first rotating body is formed with a second gear that rotates integrally with the first gear, The second gear is configured such that power is transmitted by the drive gear. Therefore, with a simple configuration, the first rotating body can be upstream of the power transmission with respect to the second rotating body.

  According to a third aspect of the present invention, in the second aspect, in a state where the engagement between the first gear and the protrusion is released, the second rotating body stops, and the drive gear and the When the first rotating body rotates in the forward direction and the drive gear is driven in the reverse direction, the first rotating body rotates in the reverse direction, and the lever member is retracted so that the action portion is separated from the clutch portion. Then, the urging means moves the clutch portion so that the protrusion engages with the first gear, and when the drive gear is switched from reverse drive to forward drive, The first rotating body and the second rotating body integrally rotate forward, the lever member presses the outer peripheral edge of the second rotating body rotating forward, and the second rotating body When the action portion of the lever member is opposed to the first concave portion after substantially one rotation. The action portion presses the clutch portion to release the engagement between the first gear and the protrusion, the first rotating body continues to rotate normally, and the second rotating body stops. The clutch device is configured as described above.

According to the 3rd aspect of this invention, in addition to the effect similar to a 2nd aspect, the said lever member can be operated by normal rotation and reverse rotation of the said drive gearwheel.
Further, the projecting portion and the first gear can be easily engaged by changing the drive gear from the normal rotation state to the reverse rotation state.
Furthermore, the engagement can be released with a simple configuration when the second rotating body has made approximately one rotation in the forward rotation direction.

  According to a fourth aspect of the present invention, in the third aspect, when the action portion faces the first concave portion, the cam mechanism interlocked with the second rotating body and accompanied by an urging force is provided. The clutch device is configured to apply a force that causes the second rotating body to rotate forward with respect to the second rotating body.

  According to the fourth aspect of the present invention, in addition to the same effect as the third aspect, when the action part faces the first recess, the second rotary body is interlocked, and A cam mechanism with an urging force is configured to apply a force that causes the second rotating body to rotate forward with respect to the second rotating body. That is, by applying an external force, the second rotating body is forcibly rotated to a position where the second rotating body stops in a state where the engagement between the first gear and the protrusion is released. It is configured to let you. Therefore, the engagement between the protrusion and the first gear can be more reliably released. As a result, it is possible to more reliably prevent the occurrence of a “clicking” sound when the protrusion gets over the teeth of the first gear without being completely released from the engagement.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the rotating shaft of the lever member has a third gear that transmits power adjacent to the driving gear, and the third gear. And a torque limiter for restricting transmission of power transmitted to the gear 3 to the lever member, and when the drive gear is in a normal rotation state, the action portion of the lever member is the second rotating body. It is comprised so that the outer periphery of this or the said clutch part may be pressed.

  According to the fifth aspect of the present invention, in addition to the same effects as any one of the first to fourth aspects, power is transmitted to the rotation shaft of the lever member adjacent to the drive gear. A third gear and a torque limiter that restricts transmission of power transmitted to the third gear to the lever member are provided. Therefore, when the drive direction of the drive gear is switched, the lever member can be rotated with a simple configuration so as to be able to contact and separate from the second rotating body. Moreover, the said action part can be made to press the said clutch part.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the first gear is formed in a ratchet shape, and the clutch portion has the projection portion in the shape of the ratchet wheel. The clutch device is configured to swing about a clutch shaft as a fulcrum so as to mesh with a tooth bottom between formed teeth.

According to the sixth aspect of the present invention, in addition to the same function and effect as in any one of the first to fifth aspects, the first gear is formed in a pinion shape. Therefore, even if the protrusion and the first gear are engaged, power can be transmitted only when the projection rotates in one direction.
Further, the clutch portion is configured to swing around the clutch shaft so that the projection portion meshes with the tooth bottom between the teeth formed in the shape of the ratchet wheel. For example, when rotating in the one direction in which power can be transmitted, if the clutch shaft is provided in the vicinity of the rear end side of the protrusion in the rotation direction, the protrusion can be surely rotated in the one direction. And the engagement of the first gear. On the other hand, when rotating in the direction opposite to the one direction, the first gear can be idled with respect to the clutch portion so that the protrusion is easily pushed up by the first gear.

  According to a seventh aspect of the present invention, in the sixth aspect, the distance from the clutch shaft to the protrusion and the distance from the clutch shaft to the pressed portion pressed against the action portion in the clutch portion are: The clutch device is configured to have the same degree.

According to the seventh aspect of the present invention, in addition to the same functions and effects as those of the sixth aspect, the distance from the clutch shaft to the protrusion, and the object to be pressed against the action portion in the clutch portion from the clutch shaft. The distance to the pressing portion is configured to the same extent. At this time, when the clutch portion is compared to the “lever principle”, the clutch shaft is a fulcrum, the projection is an action point, and the pressed portion is a force point. Therefore, the distance from the fulcrum to the action point and the distance from the fulcrum to the force point are approximately the same, and the so-called lever ratio can be set to approximately 1: 1. That is, if the stroke of the action portion of the lever member is sufficiently provided, the stroke of the protrusion provided on the clutch portion can be sufficiently provided. As a result, the engagement between the projection and the first gear can be reliably released.
Further, if the angle formed by the protrusion from the clutch shaft and the pressed portion from the clutch shaft is θ, the angle difference between the swinging direction of the protruding portion and the swinging direction of the pressed portion is also θ. Become. At this time, since the action part of the lever member may be provided so as to press in the substantially same direction as the swinging direction of the pressed part, the configuration is easy.

  According to an eighth aspect of the present invention, in the sixth or seventh aspect, a claw portion is provided on a distal end side of the action portion of the lever member, and the clutch portion is a second portion engaged with the claw portion. When the action portion presses the clutch portion, the second recess and the claw portion are engaged between the clutch shaft and the rotation shaft of the lever member. The clutch device is configured to be configured as described above.

  For example, when some force other than the urging means is applied to the clutch part, the clutch part may swing against the pressing of the action part of the lever member and the power transmission state may be switched.

Therefore, according to the eighth aspect of the present invention, in addition to the same effect as the sixth or seventh aspect, a claw portion is provided on the tip side from the action portion of the lever member, and the clutch portion has A second recess is provided to engage with the claw portion. Therefore, when the action portion is in a state of pressing the clutch portion, the claw portion and the second recess are engaged, and the pressing state can be stably held.
Further, in this aspect, when the action portion is in a state of pressing the clutch portion, the second recess and the claw portion are engaged between the clutch shaft and the rotation shaft of the lever member. Is configured to do. That is, when the clutch portion is rotated with the rotation of the lever member, the rotation direction of the lever member and the swinging (rotation) direction of the clutch portion are opposite to each other. It is configured. Therefore, in the state where the claw portion and the second concave portion are engaged, when the certain force is applied to the clutch portion, the second concave portion is determined based on the claw portion of the lever member. Then, it tries to escape to the tip side of the lever member. However, since the claw portion does not rotate toward the distal end side of the lever member, it is possible to reliably restrict the second recess from trying to escape toward the distal end side. That is, even if the clutch portion tries to swing by itself, the engagement is not released unless the lever member first rotates to release the engagement between the claw portion and the second recess. The state in which the portion presses the clutch portion can be held more stably.

  According to a ninth aspect of the present invention, in any one of the fifth to eighth aspects, the moving direction when the action portion presses the clutch portion is located on the front end side in the forward rotation direction of the first recess. The clutch device is provided with an inclined portion that is inclined in the same direction.

When the engagement between the protrusion and the first gear is released, if the engagement is released slowly, the protrusion is in the state immediately before the engagement is completely released. There is a risk of getting over the teeth while generating a ticking sound.
Therefore, the ninth aspect of the present invention has the same effect as that of any one of the fifth to eighth aspects, and the action portion is located on the front end side in the forward rotation direction of the first recess. An inclined portion that is inclined in the same direction as the moving direction when pressing the portion is provided. At this time, in the forward rotation state of the drive gear, the lever member approaches the second rotating body, and the action portion is in a state in which the rotation is restricted by the outer peripheral edge of the second rotating body. . Therefore, when the action part of the lever member is opposed to the first recess while being restricted by the outer peripheral edge of the second rotating body, the restriction is instantly released by the inclined part. That is, the action portion moves gradually by a stroke until the engagement is released instantaneously with good responsiveness, not gradually, and the engagement between the protrusion and the first gear is released instantaneously. be able to. As a result, when the engagement is released, there is no possibility of generating the “tick” sound.

  According to a tenth aspect of the present invention, there is provided a feeding unit that feeds the stacked recording media by a feeding roller, and a recording unit that performs recording on the recording medium fed from the feeding unit. The feeding unit includes the clutch device according to any one of the first to ninth aspects, and the second rotating body provides power to the feeding roller. The recording apparatus is configured to transmit.

  According to the tenth aspect of the present invention, the feeding unit of the recording apparatus includes the clutch device according to any one of the first to ninth aspects. In addition to the same operational effects as described in any of the eighth aspects, the power of the drive gear can be intermittently transmitted to the feeding roller.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall perspective view showing an outline of a recording apparatus according to the present invention. FIG. 2 is an overall plan view showing an outline of the recording apparatus according to the present invention.
A paper feed cassette 101 on which sheets as recording media are stacked is detachably provided on the back side of the main body of the recording apparatus 100. The sheets stacked on the top of the sheet feeding cassette 101 are fed by the feeding unit 144 to the recording unit side which is the downstream side in the transport direction. Specifically, the stacked sheets are picked up by a feeding roller 212 (see FIGS. 3 and 4) driven by a feeding motor 104 and guided by a sheet guide 103, on the downstream side in the conveying direction. (Not shown). The sheet fed to the conveyance roller is further conveyed to the recording unit 143 on the downstream side in the conveyance direction by a conveyance roller driven by a conveyance motor (not shown). The recording unit 143 includes a platen 105 that supports a sheet from below and a carriage 107 that is provided to face the upper side of the platen 105. Among them, the carriage 107 is driven by the carriage motor 102 while being guided by a carriage guide shaft (not shown) extending in the main scanning direction. Further, a recording head 106 that discharges ink toward the paper is provided on the bottom surface of the carriage 107. The sheet recorded by the recording unit 143 is further conveyed downstream and is discharged from the front side of the recording apparatus 100 by a discharge roller (not shown).

  Further, an ink cartridge (not shown) is loaded below the main body of the recording apparatus 100, and ink is supplied to an ink supply path (not shown) via an ink supply needle (not shown). Further, the ink is supplied to the recording head 106 of the carriage 107 via the ink supply tube 110. When the recording head 106 is flushed and cleaned, ink is ejected and sucked in the ink suction device 200 that is provided on the first digit side and maintains the ejection characteristics of the recording unit 143. The ink suction device 200 includes a cap unit 213 and is configured to seal the recording head 106 by moving the cap unit 213 in the vertical direction.

  3 and 4 are perspective views showing an outline of the feeding unit according to the present invention. Among these, FIG. 3 shows a state where transmission of power is cut off in the clutch device according to the present invention. On the other hand, FIG. 4 shows a state where power is transmitted. First, the operation of the feeding unit 144 due to intermittent transmission of power of the clutch device 300 will be described, and the structure of the clutch device 300 will be described in detail later.

  Reference numeral 210 shown in FIGS. 3 and 4 is a hopper. The hopper 210 is provided on the downstream side of the paper cassette, and is configured to swing so as to be able to come into contact with and separate from the feeding roller 212 with the hopper shaft 211 as a fulcrum. The hopper 210 is configured to operate in conjunction with a side-view D-type feeding roller 212. Specifically, the power of the feed roller shaft 355 that is the shaft of the feed roller 212 is changed from the gear A347 (see FIG. 5) provided on the feed roller shaft to the gears B348, C349, which are intermediate gears, It is transmitted to the camshaft 356 via the gear D350. A hopper cam 345 is formed on the cam shaft 356, and the hopper cam 345 and the hopper lever 351 constitute a cam mechanism 344. As the hopper cam 345 rotates, the contact portion 353 (see FIGS. 6 to 9) of the hopper lever 351 is pressed, so that the hopper lever 351 rotates with the hopper lever shaft 352 as a fulcrum. At this time, by the rotation of the hopper lever 351, the hopper lever operation portion 354 (see FIGS. 6 to 9) can push the hopper 210 from below to bring the hopper 210 closer to the feeding roller 212.

  When the string portion of the side-view D-type feeding roller 212 faces the hopper 210, the hopper 210 is in a lowered state, that is, a state separated from the sheet feeding roller. In the present application, this state is referred to as a “feed roller reset state”. The feed roller starts to rotate from the “reset state of the feed roller”, and the hopper 210 is pushed up by the hopper lever action portion 354. That is, the hopper 210 approaches the paper feed roller. Therefore, among the sheets stacked on the hopper 210, the uppermost sheet comes into contact with the feed roller 212, is picked up by friction with the feed roller 212, and is fed to the downstream transport roller. . Then, the string portion of the side-view D-type feeding roller 212 again faces the hopper 210, and the hopper 210 is released from the pushing-up force from the hopper lever action portion 354 and separated from the feeding roller 212. It returns to the “feed roller reset state” again. Here, the leading end portion of the sheet is configured to reach the transport roller by one rotation of the feeding roller 212.

In the present embodiment, the feeding motor 104 is configured to be a power source for the ink suction device 200 as well as the feeding roller 212. Therefore, it is necessary to provide a state in which power is transmitted to both the feed roller 212 and the ink suction device 200 and a state in which power is transmitted to only one of them. Therefore, the clutch device 300 that intermittently transmits power is provided in the power transmission unit 214 that transmits power from the feeding motor 104 to the feeding roller shaft 355. As shown in FIGS. 3 and 4, the clutch device 300 includes a lever member 330, and is configured to be switched between a connected state and a disconnected state of power transmission when the lever member 330 swings.
Here, it is needless to say that the feeding motor 104 may be configured to be a power source of the transport roller instead of the ink suction device 200.

Next, the structure of the clutch device 300 will be described.
FIG. 5 is a partial cross-sectional view of the periphery of the clutch device of the present invention, and is a partial cross-sectional view taken along the line XX ′ of FIG.
6 to 9 are side views showing the clutch device of the present invention. Among these, FIG. 6 shows the reset state of the feeding roller, FIG. 7 shows the reverse state of the drive gear, FIG. 8 shows the clutch part connected / forward rotation state, and FIG. Show.

  As shown in FIGS. 5 to 9, the clutch device 300 includes a first rotating body 310, a second rotating body 320, and a lever member 330. The first rotating body 310 and the second rotating body 320 are provided so as to rotate on the same axis. As shown in FIG. 5, the first rotating body 310 includes a first gear 312 having a toothed wheel shape and a second gear 311 formed integrally with the first gear 312. The second gear 311 is provided to rotate by receiving the power of the drive gear 341 that is driven by the feeding motor 104.

The second rotator 320 includes a base 324 and a clutch portion 321 provided inside the base 324. The base 324 is formed to be slightly larger than the clutch portion 321, and a first recess 325 having an inclined portion 326 is provided on the outer peripheral edge 324 a of the base 324. The clutch portion 321 is formed with a projection 323 that engages with the first gear 312 and a second recess that engages with a claw portion 333 of the lever member 330 described later. Further, the clutch portion 321 is provided so that the protrusion 323 and the first gear 312 are engaged and released by swinging around the clutch shaft 322 provided on the base 324. Here, the clutch portion 321 is urged so that the protrusion 323 moves toward the first gear 312 and engages with a spring (not shown).
Further, since the second rotating body 320 is provided integrally with the feeding roller shaft 355, the feeding roller 212 is configured to rotate with the rotation of the second rotating body 320.

  The lever member 330 includes an action portion 332 having a thickness equivalent to the thickness of the base body 324 in the rotation axis direction, and a claw portion 333 having a thickness equivalent to the thickness of the clutch portion 321 in the rotation axis direction on the distal side from the action portion 332. Are formed (see FIG. 5). The lever member 330 swings about the lever shaft 331 as a fulcrum so that the action part 332 and the claw part 333 can contact and separate from the second rotating body 320. The lever member 330 is swung by forward / reverse drive of the drive gear 341. Specifically, a third gear 342 that receives the power of the drive gear 341 is provided coaxially with the lever shaft 331, and the third gear 342 is provided to rotate integrally with the lever shaft 331. In the lever member 330, a torque limiter 343 is provided on the side opposite to the action portion 332. The torque limiter 343 includes a spring and is configured to generate a certain frictional resistance by urging the lever shaft 331. Therefore, the lever member 330 can swing so as to come into contact with and separate from the second rotating body 320 as the drive gear 341 is driven. And when approaching the 2nd rotary body 320, it can press with respect to the 2nd rotary body 320 with the force below a fixed value. While being pressed, the lever shaft 331 is idling with respect to the lever member 330.

Subsequently, the operation of the clutch device will be described in the order of FIGS.
FIG. 6 shows a reset state of the clutch device. The “clutch device reset state” is also a “feed roller reset state” in which the string portion of the feed roller 212 faces the hopper 210.
As shown in FIG. 6, when the drive gear 341 is driven to rotate forward, that is, rotates in the counterclockwise direction, power is transmitted to the second gear 311 constituting the first rotating body 310, and the second gear 311 Rotate clockwise. With the rotation of the second gear 311, the first gear 312 having a pinion shape formed integrally with the second gear 311 also rotates in the clockwise direction.

On the other hand, on the lever member side, when the drive gear 341 rotates counterclockwise, the third gear 342 rotates clockwise. Accordingly, the lever member 330 swings in the clockwise direction when power is transmitted via the torque limiter 343. At this time, the action portion 332 of the lever member 330 faces the first recess 325 formed in the base body 324 of the second rotating body 320. Therefore, the action portion 332 contacts and presses the pressed portion 327 of the clutch portion 321 provided inside the second rotating body 320, and the projection portion 323 of the clutch portion 321 is separated from the first gear 312. Thus, the clutch portion 321 is swung with the clutch shaft 322 as a fulcrum. At this time, the force that the torque limiter 343 presses against the pressed portion 327 via the action portion 332 is a spring (not shown) that urges the clutch portion 321 so that the projection portion 323 engages with the first gear 312. It is provided to be larger than the urging force.
Accordingly, power transmission from the first gear 312 on the first rotating body side to the protrusion 323 on the second rotating body side is cut off.

  Further, since no power is transmitted to the second rotating body 320, the gears A to D347 to 350, the hopper cam 345, and the hopper lever 351 are in a stopped state. Here, the hopper lever 351 is always urged counterclockwise by a spring (not shown). In the reset state, the contact portion 353 of the hopper lever 351 is configured to press against the cam recess 346 of the hopper cam 345 by the biasing force of the spring.

  At this time, the carriage 107 is at a position facing the ink suction device 200. The carriage 107 holds the lever member 330 so that the lever member 330 is not separated from the second rotating body 320. Accordingly, even if the feeding motor 104 is driven in reverse, the clutch portion 321 is swung so that the projection 323 and the first gear 312 are not engaged. When the feeding motor 104 is driven in reverse in this state, the cap portion 213 of the ink suction device 200 moves upward to seal the nozzle opening forming surface of the recording head 106 at the opposite position. Along with this, the pump unit (not shown) of the ink suction device 200 is operated by the power of the feeding motor 104 to apply a negative pressure in the cap unit and suck ink from the nozzle openings of the recording head 106. .

  Thereafter, when the feeding motor 104 is driven to rotate forward, the cap portion 213 moves away from the nozzle opening forming surface of the recording head 106. Then, the carriage 107 is moved to a position where it does not come into contact with the lever member 330, and the operation shown in FIG.

FIG. 7 shows a reverse drive state of the drive gear.
As shown in FIG. 7, when the drive gear 341 is driven in reverse, that is, rotated in the clockwise direction, the second gear 311 and the first gear 312 that constitute the first rotating body 310 rotate in the counterclockwise direction. On the other hand, the lever member 330 swings counterclockwise because the third gear 342 rotates counterclockwise. Therefore, the action part 332 of the lever member 330 is separated from the pressed part 327 of the clutch part 321. Accordingly, the clutch portion 321 swings clockwise with the clutch shaft 322 as a fulcrum by the urging force of the spring that urges the clutch portion 321 described above, and the projection 323 of the clutch portion 321 and the toothed wheel shape. The first gear 312 is engaged.

However, since the teeth of the first gear 312 are formed in a claw shape, as shown in FIG. 7, when the first gear 312 rotates counterclockwise, the protrusion 323 is pushed up. In other words, the protrusion 323 makes a “click” sound and gets over the teeth of the first gear 312. This is because it is not desired to reverse the feed roller 212, so that even if the projection 323 and the first gear 312 are engaged, the drive gear 341 is configured to prevent transmission of power in the case of reverse drive. Is.
Here, the time during which the drive gear 341 is driven to rotate in reverse is such that the action portion 332 of the lever member 330 is separated from the pressed portion 327 of the clutch portion 321 and the projection 323 and the first gear 312 are engaged. A short time is sufficient.
At this time, the cap portion 213 moves slightly upward as the drive gear 341 is driven in reverse rotation.
Further, the lever member 330 is restricted by a restricting portion (not shown) so as not to swing more counterclockwise than necessary.

FIG. 8 shows a normal rotation driving state after the reverse rotation driving of the drive gear of FIG.
As shown in FIG. 8, when the drive gear 341 is driven to rotate in the forward direction with the protrusion 323 and the first gear 312 engaged, the second gear 311 and the first gear 312 rotate in the clockwise direction. The rotating power of the first gear 312 is transmitted to the protrusion 323 of the clutch part 321. Here, as described above, the clutch portion itself is provided so as to swing with respect to the base 324 of the second rotating body 320 with the clutch shaft 322 as a fulcrum. 1 is provided so as to be rotatable on the same axis as the rotating body 310. Therefore, when the first gear 312 constituting the first rotating body 310 and the protrusion 323 constituting the second rotating body 320 are engaged and the drive gear 341 is driven to rotate forward, The first rotator 310 and the second rotator 320 are rotated together with the power transmitted thereto. That is, the clutch device 300 is in a power transmission connection state from the first rotating body 310 to the second rotating body 320.

  On the other hand, the lever member 330 swings in the clockwise direction, and the action portion 332 presses the outer peripheral edge 324 a of the base body 324 constituting the second rotating body 320. Here, when the drive gear 341 is switched from the reverse rotation drive to the normal rotation drive, the action portion 332 does not face the first recess 325 of the base 324 and is behind the first recess 325 in the normal rotation direction of the base 324. It is comprised so that it may oppose and oppose the base | substrate outer periphery 324a of the side. In other words, after the second rotating body 320 is rotated clockwise by the amount of the first recess 325, the action portion 332 is configured to contact and press the base outer peripheral edge 324a of the second rotating body 320. Yes.

  Further, when the second rotating body 320 rotates, the feed roller shaft 355 also rotates. Along with this, the gears A to D347 to 350 also rotate. Therefore, as described above, the feed roller 212 starts to rotate in the clockwise direction, and the cam mechanism 344 acts to push the hopper 210 up by the hopper lever action portion 354. That is, the hopper 210 approaches the paper feed roller. Therefore, among the sheets stacked on the hopper 210, the uppermost sheet comes into contact with the feed roller 212, is picked up by friction with the feed roller 212, and is fed to the downstream transport roller. . Then, after being picked up, the hopper 210 is returned to the original position.

  During this time, the cap portion 213 moves downward as the drive gear 341 rotates forward. After the cap portion 213 has been lowered, a torque limiter (not shown) in the ink suction device is activated to limit power transmission.

  FIG. 9 shows a state immediately before returning to the state of FIG. 6 by further forward driving from the state of FIG. As shown in FIG. 9, when the drive gear 341 continues to rotate in the forward direction, the action portion 332 continues to press the outer peripheral edge 324 a of the base 324 constituting the second rotating body 320. Then, after the protrusion 323 and the first gear 312 shown in FIG. 7 are engaged, after the drive gear 341 shown in FIG. 8 is switched from reverse rotation to normal rotation, that is, the first rotating body. After the power transmission from 310 to the second rotating body 320 is in the connected state, when the second rotating body 320 makes approximately one rotation, the action portion 332 again tries to face the first recess 325 of the base 324. .

  When the action portion 332 faces the first recess 325, the action portion 332 swings clockwise while being guided by the inclined portion 326 provided on the front end side in the rotation direction of the first recess 325. Therefore, the action portion 332 pushes the clutch portion 321 with the clutch shaft 322 as a fulcrum so that the engagement between the projection portion 323 and the first gear 312 is released while pressing the pressed portion 327 of the clutch portion 321. Rock. The engagement between the projection 323 and the first gear 312 is released, the power transmission from the first rotating body 310 to the second rotating body 320 is cut off, and the rotation of the feeding roller 212 stops. .

  At this time, by adjusting the position of the inclined portion 326, the timing at which the action portion 332 presses the clutch portion 321 can be adjusted. Moreover, the speed at which the lever member 330 swings can be adjusted by adjusting the angle of the inclined portion 326. Further, by adjusting the ratio of the distance from the clutch shaft 322 to the projection 323 and the distance from the clutch shaft 322 to the pressed portion 327, the engagement of the projection 323 with the first gear 312 is released. The swinging speed of can also be adjusted.

  Further, as described above, the hopper lever 351 is urged by a spring (not shown) so as to rotate counterclockwise. One hopper cam 345 is formed with a cam recess 346. Accordingly, the hopper cam 345 that rotates integrally with the gear D350 rotates so that the contact portion 353 meshes with the cam recess 346. Accordingly, power is transmitted in the order of gear D350, gear C349, gear B348, and gear A347, and the feed roller shaft 355 is returned to the original reset position shown in FIG. That is, each member can be reliably returned to the original reset state shown in FIG. 6 by using the urging force of the hopper lever 351 that is an external force other than the clutch device.

  6 again, the claw portion 333 of the lever member 330 engages with the second recess of the clutch portion 321. This engagement is for maintaining the state of disengagement between the protrusion 323 and the first gear 312 and is configured not to be released unless the lever member itself is separated from the second rotating body 320. ing. In other words, even if the clutch portion 321 receives a force other than the spring urging the clutch portion 321 and tries to swing the lever member 330 in the direction away from the second rotating body 320, the claw portion 333. And the second recess are not disengaged.

  In the clutch device 300 of the present embodiment, a first rotating body 310 and a second rotating body 320 are provided so as to be rotatable coaxially, and a first gear 312 provided on the first rotating body 310, A clutch device 300 in which the lever member 330 performs engagement / disengagement with the protrusion 323 provided on the second rotating body 320 to transmit and receive the power of the driving gear 341 intermittently. A clutch portion 321 having a first recess 325 provided on the outer peripheral edge 324 a and a projection 323, which is provided on the second rotary body side and is movable with respect to the second rotary body 320, and a projection 323 are provided. The drive gear 341 includes an urging unit that urges the clutch portion 321 toward the direction of engagement with the first gear 312, and an action portion 332 that is provided on the lever member 330 and can press the clutch portion 321. The first round When the action part 332 faces the first recess 325 due to the normal rotation of the body 310 and the second rotating body 320, the action part 332 presses the clutch part 321 and presses the first gear 312 and the protrusion 323. The engagement is released.

In other words, the lever member 330 rotates when the action part 332 faces the first recess 325. The clutch portion 321 can be pressed and moved by the rotation stroke of the action portion 332 of the lever member 330. That is, a sufficient rotation stroke of the action part 332 can be easily provided.
As a result, the engagement between the protruding portion 323 provided on the clutch portion 321 and the first gear 312 can be reliably released. Accordingly, it is possible to prevent the occurrence of a “click” sound when the protrusion 323 climbs over the teeth of the first gear 312 without completely releasing the engagement.
Furthermore, the timing at which the action part 332 presses the clutch part 321 can be easily set according to the size and position of the first recess 325. Further, depending on the shape of the first recess 325, it is possible to set the speed at which the clutch part 321 pressed by the action part 332 moves regardless of the rotational speed of the second rotating body 320. is there.

In the clutch device 300 of this embodiment, the first rotating body 310 is formed with a second gear 311 that rotates integrally with the first gear 312, and the second gear 311 is powered by the drive gear 341. It is configured to be transmitted.
As a result, the first rotating body 310 can be upstream of the power transmission with respect to the second rotating body 320 with a simple configuration.

  In the clutch device 300 of the present embodiment, the second rotating body 320 stops and the drive gear 341 and the first rotating body 310 are in a state where the engagement between the first gear 312 and the protrusion 323 is released. When the drive gear 341 is rotated in the forward direction, the first rotating body 310 is rotated in the reverse direction, and the lever member 330 is moved by the biasing means as the operating portion 332 moves away from the clutch portion 321. When the clutch 321 moves so that the protrusion 323 engages with the first gear 312 and the drive gear 341 switches from reverse rotation to forward rotation, the engagement causes the first rotating body 310 and The second rotating body 320 integrally rotates in the forward direction, the lever member 330 presses the outer peripheral edge 324a of the second rotating body 320 that rotates in the forward direction, and the second rotating body 320 rotates substantially once and the lever Member 330 When the action portion 332 faces the first recess 325, the action portion 332 presses the clutch portion 321 to release the engagement between the first gear 312 and the protrusion 323, and the first rotating body 310 is The second rotating body 320 is configured to stop rotating continuously and stop.

As a result, the lever member 330 can be operated by forward / reverse rotation of the drive gear 341.
Further, the projection 323 and the first gear 312 can be easily engaged by changing the drive gear 341 from the normal rotation state to the reverse rotation state.
Furthermore, the engagement can be released by a simple configuration when the second rotating body 320 has made approximately one rotation in the forward rotation direction.

  Further, in the clutch device 300 of the present embodiment, when the action portion 332 faces the first recess 325, the cam mechanism 344 that is interlocked with the second rotating body 320 and has an urging force is The rotating body 320 is configured to apply a force that causes the second rotating body 320 to rotate forward. That is, by applying an external force, the second rotating body 320 is forcibly rotated to a position where the second rotating body 320 in a state where the engagement between the first gear 312 and the protrusion 323 is released stops. It is configured to let you.

  As a result, the engagement between the protrusion 323 and the first gear 312 can be released more reliably. Therefore, it is possible to more reliably prevent the occurrence of a “click” sound when the protrusion 323 climbs over the teeth of the first gear 312 without completely releasing the engagement.

The rotation shaft of the lever member 330 according to the present embodiment has a third gear 342 that transmits power adjacent to the drive gear 341, and the power transmitted to the third gear 342 is transmitted to the lever member 330. And a torque limiter 343 for limiting, and configured so that the action portion 332 of the lever member 330 presses the outer peripheral edge 324a of the second rotating body 320 or the clutch portion 321 when the drive gear 341 is rotated forward. It is characterized by being.
As a result, when the drive direction of the drive gear 341 is switched, the lever member 330 can be rotated with a simple configuration so as to be able to contact and separate from the second rotating body 320. Further, the action portion 332 can press the clutch portion 321.

The first gear 312 of the present embodiment is formed in a claw wheel shape.
As a result, even if the protrusion 323 and the first gear 312 are engaged, power can be transmitted only when the projection 323 is rotated in one direction.
In addition, the clutch portion 321 of the present embodiment is configured to swing around the clutch shaft 322 as a fulcrum so that the protruding portion 323 meshes with the tooth bottom between the teeth formed in the shape of a ratchet. And
As a result, when rotating in the one direction in which power can be transmitted, if the clutch shaft 322 is provided in the vicinity of the rear end side of the protrusion 323 in the rotating direction, The engagement between the protrusion 323 and the first gear 312 can be maintained. On the other hand, when rotating in the direction opposite to the one direction, the first gear 312 can be idled with respect to the clutch portion 321 so that the projection 323 can be easily pushed up by the first gear 312. .

The clutch device 300 of the present embodiment is configured such that the distance from the clutch shaft 322 to the protrusion 323 and the distance from the clutch shaft 322 to the pressed portion 327 pressed by the action portion 332 in the clutch portion 321 are the same. It is characterized by being.
At this time, when the clutch portion 321 is compared to the “leverage principle”, the clutch shaft 322 is a fulcrum, the projection 323 is an action point, and the pressed portion 327 is a force point. Therefore, the distance from the fulcrum to the action point and the distance from the fulcrum to the force point are approximately the same, and the so-called lever ratio can be set to approximately 1: 1. That is, if the stroke of the action part 332 of the lever member 330 is sufficiently provided, the stroke of the protrusion 323 provided in the clutch part 321 can also be sufficiently provided.

As a result, the engagement between the protrusion 323 and the first gear 312 can be reliably released.
Furthermore, if the angle formed between the clutch shaft 322 and the protruding portion 323 and the clutch shaft 322 and the pressed portion 327 is θ, the angular difference between the swinging direction of the protruding portion 323 and the swinging direction of the pressed portion 327 is also determined. θ. At this time, since the action part 332 of the lever member 330 should just be provided so that it may press in the substantially the same direction as the rocking | fluctuation direction of the to-be-pressed part 327, a structure is easy.

For example, when any force other than the urging means is applied to the clutch portion 321, the clutch portion 321 may swing against the pressing of the action portion 332 of the lever member 330 and the power transmission state may be switched. .
Therefore, in the clutch device 300 of the present embodiment, the claw portion 333 is provided on the distal end side of the action portion 332 of the lever member 330, and the clutch portion 321 is provided with a second recess that engages with the claw portion 333. ing. Therefore, when the action part 332 is in a state of pressing the clutch part 321, the claw part 333 and the second recess are engaged, and the pressing state can be stably held.

Further, in this aspect, when the action portion 332 presses the clutch portion 321, the second recess and the claw portion 333 are engaged between the clutch shaft 322 and the rotation shaft of the lever member 330. It is configured as follows. That is, when the clutch portion 321 rotates with the rotation of the lever member 330, the rotation direction of the lever member 330 and the swing (rotation) direction of the clutch portion 321 are opposite to each other. It is configured.
As a result, in the state where the claw portion 333 and the second concave portion are engaged, when the force is applied to the clutch portion 321, the second concave portion is considered based on the claw portion 333 of the lever member 330. Tries to escape to the front end side of the lever member 330. However, since the claw portion 333 does not rotate toward the distal end side of the lever member 330, it is possible to reliably restrict the second recess from attempting to escape toward the distal end side. That is, even if the clutch portion 321 tries to swing itself, the engagement is not released unless the lever member 330 first rotates to release the engagement between the claw portion 333 and the second recess. The state where 332 presses the clutch portion 321 can be held more stably.

When the engagement between the protrusion 323 and the first gear 312 is released, if the engagement is released slowly, the protrusion 323 is moved to the first gear just before the engagement is completely released. There is a risk of getting over the teeth of 312 while generating a ticking sound.
Therefore, an inclined portion 326 that is inclined in the same direction as the moving direction when the action portion 332 presses the clutch portion 321 is provided on the front end side in the forward rotation direction of the first recess 325 of the present embodiment. Features.

  At this time, in the forward rotation state of the drive gear 341, the lever member 330 approaches the second rotating body 320, and the action portion 332 is in a state in which the rotation is restricted by the outer peripheral edge 324 a of the second rotating body 320. It becomes. Therefore, when the action part 332 of the lever member 330 is opposed to the first recess 325 while being restricted by the outer peripheral edge 324a of the second rotating body 320, the restriction is instantly released by the inclined part 326. That is, the action portion 332 moves gradually by a stroke until the engagement is released instantaneously with good responsiveness rather than gradually, and the engagement between the projection 323 and the first gear 312 is instantaneously released. can do. As a result, when the engagement is released, there is no possibility of generating the “tick” sound.

The recording apparatus 100 according to this embodiment includes a feeding unit 144 that feeds stacked recording media by a feeding roller 212, and recording that performs recording on the recording medium fed from the feeding unit 144. The feeding device 144 includes the clutch device 300 according to any one of the first to ninth aspects, and the second rotating body 320 includes a feeding roller. 212 is configured to transmit power.
As a result, in the recording apparatus 100, in addition to the same effects as those of the clutch apparatus 300, the power of the drive gear 341 can be intermittently transmitted to the feeding roller 212.

In the present embodiment, the transmission of power from the first rotating body to the second rotating body is cut off, but conversely, the power of the power from the second rotating body to the first rotating body is cut off. Of course, the transmission can be cut off.
Further, although the clutch portion is provided so as to swing around the clutch shaft as a fulcrum, it is needless to say that the clutch portion may be provided so as to move linearly.
Furthermore, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

1 is an overall perspective view showing an outline of a recording apparatus according to the present invention. FIG. 1 is an overall plan view schematically showing a recording apparatus according to the present invention. The perspective view which shows the outline of the feeding part which concerns on this invention (clutch disconnection state) The perspective view which shows the outline of the feeding part which concerns on this invention (clutch connection state) Plane partial sectional view showing the periphery of the clutch device of the present invention The side view which shows the reset state in the clutch apparatus of this invention The side view which shows the reverse rotation state in the clutch apparatus of this invention The side view which shows the connection and forward rotation state in the clutch apparatus of this invention Side view showing a state immediately before returning to the state of FIG. 6 from the state of FIG. Side view showing a conventional clutch device

Explanation of symbols

100 recording device, 101 paper feed cassette, 102 carriage motor,
103 paper guide, 104 feeding motor, 105 platen, 106 recording head,
107 Carriage, 110 Ink supply tube, 143 recording unit, 144 feeding unit,
200 ink suction device, 210 hopper, 211 hopper shaft, 212 feed roller,
213 cap part, 214 power transmission part, 300 clutch device,
310 first rotating body, 311 second gear, 312 first gear,
320 Second rotating body, 321 Clutch part, 322 Clutch shaft, 323 Projection part,
324 base body, 324a outer peripheral edge, 325 first concave portion, 326 inclined portion,
327 pressed part, 330 lever member, 331 lever shaft, 332 action part,
333 Claw portion, 341 Drive gear, 342 Third gear, 343 Torque limiter,
344 cam mechanism, 345 hopper cam, 346 cam recess, 347 gear A,
348 Gear B, 349 Gear C, 350 Gear D, 351 Hopper lever,
352 hopper lever shaft, 353 contact portion, 354 hopper lever action portion,
355 Feed roller shaft, 356 Cam shaft, 400 Conventional clutch device,
410 first rotating body, 411 first gear, 412 claw wheel, 420 second rotating body,
421 Clutch part, 422 Clutch shaft, 423 Projection part, 424 Clutch claw part,
430 Lever member, 431 Lever shaft, 432 Lever claw, 433 Feed roller shaft,
434 Second gear, 435 drive gear, 436 base

Claims (10)

  A first rotating body for transmitting the power of the drive gear;
  And a second rotator that is rotatably provided coaxially with the first rotator, and is a clutch device that intermittently transmits the power of the first rotator to the second rotator. ,
  A first gear constituting the first rotating body;
  A base that constitutes the second rotating body and has a first recess formed on an outer peripheral edge;
  A clutch part that constitutes the second rotating body, has a protrusion that can be engaged with the first gear, and is movable with respect to the base;
  Urging means for urging the clutch portion so that the protrusion engages with the first gear;
  When the driving gear, the first rotating body, and the second rotating body are rotated forward, the first gear is brought into contact with the clutch portion when it is opposed to the first recess, and further pushed into the first gear. And a lever member having an action part for releasing the engagement of the clutch part with the protruding part. The clutch device according to claim 1, wherein a second gear that rotates integrally with the first gear is formed on the first rotating body,
The clutch device is characterized in that the second gear is configured such that power is transmitted by the drive gear. The clutch device according to claim 2,
In a state where the engagement between the first gear and the protrusion is released,
The second rotating body stops,
The drive gear and the first rotating body rotate forwardly,
When the drive gear is driven in reverse,
The first rotating body reverses;
As the lever member retreats so that the action portion is separated from the clutch portion,
The urging means moves the clutch portion so that the protrusion engages with the first gear,
When the drive gear is switched from reverse drive to forward drive,
By the engagement, the first rotating body and the second rotating body integrally rotate forward,
The lever member presses the outer peripheral edge of the second rotating body that rotates forwardly,
When the second rotating body rotates substantially once and the action portion of the lever member faces the first recess,
The action portion presses the clutch portion to release the engagement between the first gear and the protrusion,
The first rotating body continues to rotate forward;
The clutch device, wherein the second rotating body is configured to stop. The clutch device according to claim 3, wherein when the action portion faces the first recess,
The cam mechanism interlocked with the second rotating body and accompanied by an urging force is configured to apply a force for causing the second rotating body to rotate forward with respect to the second rotating body. A clutch device characterized by the above. The clutch device according to any one of claims 1 to 4, wherein the rotation shaft of the lever member includes:
A third gear for transmitting power adjacent to the drive gear;
A torque limiter for limiting transmission of power transmitted to the third gear to the lever member;
The clutch device is configured such that, in a normal rotation state of the drive gear, an action portion of the lever member presses an outer peripheral edge of the second rotating body or the clutch portion. The clutch device according to any one of claims 1 to 5, wherein the first gear is formed in a ratchet shape.
The clutch device is configured to swing about a clutch shaft as a fulcrum so that the protruding portion meshes with a tooth bottom between teeth formed in the shape of the ratchet wheel. The clutch device according to claim 6, wherein a distance from the clutch shaft to the protruding portion;
The clutch device is characterized in that the distance from the clutch shaft to the pressed portion pressed by the action portion in the clutch portion is configured to be approximately the same. The clutch device according to claim 6 or 7, wherein a claw portion is provided on a distal end side from the action portion of the lever member,
The clutch portion is provided with a second recess that engages with the claw portion,
When the action portion is in a state of pressing the clutch portion, the second recess and the claw portion are configured to engage between the clutch shaft and the rotation shaft of the lever member. A clutch device characterized by comprising: Clutch device according to any one of claims 5-8, wherein in the forward direction beginning side of the first recess, said in the same direction as the movement direction of when the working portion presses said clutch portion A clutch device comprising an inclined portion inclined with respect to an outer peripheral edge . A feeding unit that feeds the laminated recording media by a feeding roller;
A recording apparatus comprising: a recording unit that performs recording on a recording medium fed from the feeding unit;
The feeding section includes the clutch device according to any one of claims 1 to 9,
The recording apparatus according to claim 1, wherein the second rotating body is configured to transmit power to the feeding roller.

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