JP2534769B2 - Rotating plate lift release mechanism and cassette unit - Google Patents

Description

The present invention relates to a cassette unit for freely performing vertical and horizontal feeding of a sheet, and more specifically, when the cassette unit is pulled out from the apparatus main body, The present invention relates to a rotary plate lift release mechanism that releases a lifted state of a rotary plate for lifting sheets.

[Conventional technology]

2. Description of the Related Art Conventionally, for example, in a copying machine, several stages of cassette units are provided on a desk provided below the main body of the copying machine, and the size of sheets stacked in each cassette unit and the feeding direction (longitudinal feeding or horizontal feeding) are different. It is known that the required paper is automatically selected and the labor required for paper replacement is reduced as much as possible (JP-A-61-192637).
(See the official gazette).

By the way, in order to send out the sheets stacked on the cassette unit by the pickup roller, it is necessary to lift the uppermost sheet to a position where it can contact the pickup roller. As a means for achieving this, for example, as in the devices disclosed in JP-A-56-59245 and JP-A-56-59251, a rotary plate for lifting the paper is rotatably provided, and There is known one provided with a lift plate for lifting the sheet feeding portion of the rotary plate.

[Problems to be Solved by the Invention]

However, in the case where the above cassette unit is provided so as to be freely drawn out from the main body of the copying machine for jam processing or paper replenishment, for example, if the cassette unit is pulled out while the rotating plate is raised as described above, There is a possibility that the leading end of the sheet feeding portion of the rotary plate and the sheet feeding mechanism provided on the copying machine body side may come into contact with each other, resulting in mutual damage.

[Means for solving the problem]

In order to solve the above-mentioned problems, the rotary plate lifting / releasing mechanism according to claim 1 is provided so as to be detachable from the main body of the apparatus and provided in a cassette unit having a rotary cassette. The lifting release mechanism is characterized by the following measures.

That is, the above-mentioned lifting mechanism for the rotary plate lifts the rotary plate in which the sheets are stacked and the vertical feed paper feed unit or the horizontal feed paper feed unit can be lifted according to the rotation of the rotary cassette. A lift plate which is vertically rotatably arranged below the rotary plate to lift the vertical feed unit or the horizontal feed unit of the plate, and a first driving force for rotating the lift plate, A drive source that generates both a second drive force for rotating the rotary cassette and a drive system that transmits the first drive force are provided in the middle of the drive source, and are interlocked with the cassette unit being pulled out from the apparatus body. And a coupling means for separating the drive system, and the drive system, which is provided in the drive system, allows the lift plate to freely rotate with the separation of the drive system, and causes the lift plate to rotate downward by its own weight. Vertical rotation of the rotating plate A free rotating member for releasing the state lifting the paper feed unit or lateral feeding feeding unit is characterized in that provided respectively in said cassette unit.

The cassette unit according to claim 2 is
The present invention is characterized in that it is provided with a rotatable cassette that is detachably attached to the apparatus body and is rotatable, and that the following means are provided.

That is, in the cassette unit, sheets are stacked, and a rotary plate in which a vertical feed paper feed unit or a horizontal feed paper feed unit can be lifted according to the rotation of the rotary cassette and a vertical feed of the rotary plate are provided. A lift plate vertically rotatably arranged below the rotary plate to lift the paper feed unit or the lateral feed paper feed unit, a first driving force for rotating the lift plate, and the rotary cassette. And a drive source that generates both a second drive force for rotating the.

[Work]

According to the configuration of claim 1, when the cassette unit is pulled out from the apparatus main body, the rotary plate,
The lift plate, drive system, joint means, and free rotating member are all pulled out from the main body of the apparatus.

The rotary cassette in the cassette unit is rotated by the second driving force from the drive source, and the sheets stacked on the rotary plate are freely switched between vertical feeding and horizontal feeding. On the other hand, the lift plate is vertically rotated by the first driving force from the drive source, and the rotary plate is lifted with the rotation of the lift plate. The first driving force and the second driving force are generated by the same driving source, and the rotation of the rotary cassette and the rotation of the lift plate are performed as described above.

When the sheets stacked on the rotary plate are switched to the vertical feed or the horizontal feed according to the rotation of the rotary cassette, the vertical feed paper feed unit or the horizontal feed paper feed unit of the rotary plate is lifted by the rotation of the lift plate. The paper is fed vertically or horizontally to a paper feed mechanism provided on the apparatus main body side.

When the cassette unit is pulled out from the main body of the apparatus for jam removal and paper replenishment when the rotary plate is lifted, the following operation is performed in the cassette. That is, since the drive system is separated by the joint means in conjunction with the operation of pulling out the cassette unit from the apparatus body, the first drive force is not transmitted in the drive system. With the separation of the drive system, the free rotation member freely rotates the lift plate, and accordingly, the lift plate rotates downward by its own weight. As a result, the lifted state of the vertical feed paper feed unit or the horizontal feed paper feed unit of the rotary plate is released, so that the leading end of the vertical feed paper feed unit or the horizontal feed paper feed unit of the rotary plate and the paper feed unit provided on the apparatus main body side. It is possible to avoid a situation in which the paper mechanism comes into contact with each other to cause mutual damage.

According to the structure described in claim 2, the cassette unit is attachable to and detachable from the apparatus body. Therefore, when the cassette unit is pulled out from the apparatus body, the rotary plate, the lift plate, and the drive source are pulled out to the outside of the apparatus body.

The rotary cassette in the cassette unit is rotated by the second driving force from the drive source, and the sheets stacked on the rotary plate are freely switched between vertical feeding and horizontal feeding. On the other hand, the lift plate is vertically rotated by the first driving force from the drive source, and the rotary plate is lifted with the rotation of the lift plate. The first driving force and the second driving force are generated by the same driving source, and the rotation of the rotary cassette and the rotation of the lift plate are performed as described above.

When the sheets stacked on the rotary plate are switched to the vertical feed or the horizontal feed according to the rotation of the rotary cassette, the vertical feed paper feed unit or the horizontal feed paper feed unit of the rotary plate is lifted by the rotation of the lift plate. The paper is fed vertically or horizontally to a paper feed mechanism provided on the apparatus main body side.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

As shown in FIG. 3, an automatic document feeder (hereinafter referred to as an ADF) 3 is installed on a platen glass 2 of the copying machine 1. The ADF 3 conveys an original document (not shown) placed on the original placing table 3a to a predetermined position on the original platen glass 2 which is predetermined according to the size and the feeding direction (horizontal feeding or vertical feeding). , AD after copying is finished
In addition to the function of ejecting to the outside of F3, for example, when performing double-sided copying, the original is inverted and the original glass 2 is again placed.
The document is conveyed to the specified position above, and the original is ADF3
It also has a function that can be discharged to the outside. It should be noted that switches 4 and 5 for determining the size of the original placed on the original placing table 3a are provided on the original placing table 3a.

Below the platen glass 2, a reflection mirror 6a ... and a lens 6b are provided.
An optical system 6 composed of ... Is provided. This optical system 6
Has a basic function of guiding the reflected light reflected by the document to the photoconductor drum 7 and also has a variable magnification function, so that it is possible to perform not only equal-magnification copying but also enlarged copying and reduction copying. .

Around the photosensitive drum 7, a cleaner 8, a charge eliminating charger 9, a charging charger 10, a developing means 11 having toner for color copying, and a developing means having black toner.
12 is provided, and by these means, a series of operations of removal of residual toner on the photoconductor drum 7 → neutralization → charging → exposure (performed by the optical system 6) → development is performed. It has become.

Below the photoconductor drum 7, a transfer charger 13 and a peeling charger 14 are provided, and when a copy sheet (not shown) passes between the photoconductor drum 7 and the transfer charger 13, the transfer charger 13 causes The toner image formed on the photoconductor drum 7 is transferred to the copy paper. Further, the peeling charger 14 separates the copy sheet from the photoconductor drum 7, and the separated copy sheet is transported to the fixing device 18 by the transport belt 17. The fixing device 18 is for fixing the toner transferred to the copy sheet by heating or pressing.

The copy paper that has passed through the fixing device 18 is basically discharged to the outside of the copying machine 1, that is, through the sorter 19 to the cradle 19a ..., For example, when double-sided copying or composite copying is performed, It is configured to be guided to the double-sided synthesis unit 21 through the paper return path 20. When performing double-sided copying, the sheet is reversely placed on the intermediate tray 21c via the first transport path 21a in the double-sided synthesis unit 21, and then the delivery roller 21d.
Is fed to the paper feed path 22 at the same time, and when the composite copy is performed, the second conveyance path 21 in the double-sided composite unit 21 is used.
Then, after the trailing edge of the copy sheet is detected in the second transport path 21b, the trailing edge of the copy sheet is sent out with the trailing edge of the copy sheet in the traveling direction, and the intermediate tray 21c passes through the first transport path 21a. After being inverted and placed on the upper side, it is sent out to the sheet supply path 22 by the sending roller 21d.

The above-mentioned paper supply path 22 is a path for guiding copy paper to the above-mentioned photoconductor drum 7, and at the end portion thereof, a paper top for timing the rotation of the photoconductor drum 7 and the delivery of copy paper. A roller 15 is provided. Further, a plurality of paper supply means are connected to the paper supply path 22 so that copy paper is appropriately supplied from each of these means. Specifically, in order from the lower side of the copying machine 1, the first fixed cassette 25 and the first rotary cassette unit.
26, a second rotary cassette unit 27, the above-mentioned double-sided synthesis unit 21, a second fixed cassette 28, a third fixed cassette 29, and a manual feeding section 30 are provided. The first fixed cassette 25, the second fixed cassette 28, and the third fixed cassette 29 are detachably attached to the copying machine 1, and the first rotary cassette unit 26 and the second rotary cassette unit 27 are provided. Is provided so that it can be pulled out together with the base plate 31 with respect to the copying machine 1.

In the above-mentioned first and second rotary cassette units 26 and 27, as shown in FIG. 1, a pedestal 31a is fixed on a pedestal plate 31 which is a housing part thereof, and the pedestal 31a is erected on the pedestal 31a. One end side of an arm 32 is pivotally supported by the provided support shaft 31b, so that the arm 32 is supported rotatably in a horizontal direction. A support shaft 32a is provided upright on the other end of the arm 32, and the rotary cassette 35 is rotatably supported by the support shaft 32a. The rotary cassette 35 has a two-plate structure of a paper feed base 33 and a rotary plate 34 arranged on the paper feed base 33. When the rotary cassette 35 is rotated 90 °, copy sheets stacked on the rotary plate 34 are stored. The feed can be freely switched between vertical feed and horizontal feed. It should be noted that the pivotal position of the rotary cassette 35 by the support shaft 32a is set so that the feed center of the copy sheet passes on the support shaft 32a at each of the above-described vertical feed position and horizontal feed position.

The vertical feed unit and the horizontal feed unit of the paper feed base 33 have wall portions 33a for preventing misalignment of copy sheets.
・ 33b is bent. These walls 33a and 33
Notches 33c are formed at substantially the center of b, and each notch 33c is formed by extending a predetermined length toward the center of the bottom plate of the paper feed base 33 and extending toward the center. The lift plate 40 disposed below the rotary plate 34 is
It is designed so that it can come into contact with the back surface of the bottom plate. Lift board
The specific configuration of 40 will be described later.

Further, on the paper feed base 33, wall portions 33e and 33f are arranged so as to face the above wall portions 33a and 33b, respectively. These wall portions 33e and 33f are notches 34a and 3f formed in the rotary plate 34.
It is provided through 4b, and the lifting operation of the vertical feed paper feed unit and the horizontal feed paper feed unit on the rotary plate 34 is performed by the wall portions 33e and 33f.
It is configured so as not to be interfered by.

The rotary plate 34 is formed with an inclined portion 34f that is inclined forward and downward in the vertical feed paper feeding unit and an inclined portion 34g that is inclined forward and downward in the horizontal feed paper feeding unit.

Further, a corner portion of the rotary plate 34 between the non-paper feed side with respect to the vertical feed paper feed portion and the non-paper feed side with respect to the horizontal feed paper feed portion extends outward from the upper end of the wall portion 34d of the rotary plate 34. As described above, the support piece portion 34c is formed in a bent state, and the support structure 36 that supports the rotary plate 34 at one point is configured in the support piece portion 34c.

The non-paper feeding side of the rotating cassette 35, and the support structure described above.
A guide means 37 is provided at a position a little distance from the vertical feed delivery side from 36. The guide means 37 guides the rotary plate 34 when the vertical feeding / feeding unit of the rotary plate 34 is lifted, and the rotation fulcrum of the rotary plate 34 when the horizontal feeding / feeding unit of the rotary plate 34 is lifted. It is a part.

The paper feed section of the rotary cassette unit 26 (27)
A drive means 42 is provided to drive the rotary cassette 35 by 90 ° and to rotate the lift plate 40 for lifting the paper on the rotary plate 34 with a single drive motor 41. In this drive means 42, a gear 41a is fixed to the output shaft of the drive motor 41, and the driving force of the drive motor 41 is changed by the gear group 43 meshed with the gear 41a. It is transmitted to the two clutch 45.

The first clutch 44 is for interrupting the transmission of the driving force for the 90 ° rotation of the rotary cassette 35.
It is arranged at the side of the paper feed unit at 35. A pulley 46 is fixedly attached to the output shaft 44a of the first clutch 44, while a pulley 47 is arranged on the other side of the sheet feeding portion in the rotary cassette 35, and between these pulleys 46 and 47. An endless belt 48 is spanned. A moving block 50 is fixed to a predetermined portion of a portion of the belt 48 which passes under the pulleys 46 and 47, and the moving block 50 reciprocates as the belt 48 moves. A guide shaft 51, which extends horizontally between the pulleys 46 and 47 in a direction orthogonal to the sheet feeding direction, is inserted through a through hole formed in the substantially central portion of the moving block 50. The moving block 50 is linearly guided by 51. A support shaft is located above the moving block 50.
A holding member 52 is rotatably supported on the support shaft 50a. A substantially L-shaped angle portion 52a is formed on the holding member 52, and the angle portion 52a is attached to a corner portion of the paper feed base 33 between the vertical feed paper feed portion and the horizontal feed paper feed portion. . In addition, the position detection switch 100 is provided near the one end side and the other end side of the guide shaft 51.
.101 (shown in FIG. 2) is provided,
The position detecting switch 100 is operated by being pushed by the switch operating piece 52b fixed to the angle portion 52a, and the position detecting switch 101 being operated by being pushed by the operating piece 50b of the moving block 50.

On the other hand, the second clutch 45 is for interrupting the transmission of the driving force for the sheet lifting operation in the rotary plate 34, and the output of the second clutch 45 is transmitted to the rotary shaft 54 via the gear group 53. It is like this. That is, the output of the second clutch 45 is transmitted from each gear in the gear group 53 to the worm gear 53a, and further passes through the wheel gear 53b meshed with the worm gear 53a, so that the output shaft of the second clutch 45 is crossed. It is adapted to be transmitted to the rotating shaft 54 provided in a shape.

On the other end side of the rotary shaft 54, a joint portion 55a forming one of the first coupling (joint means) 55 is fixed,
A joint portion 55b forming the other side of the first coupling 55 is fixed to a tip end portion of a rotating shaft 56 rotatably supported on the main body of the copying machine 1. The gear 57b fixed to the rotating shaft 57 is meshed with the gear 56b fixed to the rotating shaft 56. The rotary shaft 57 is rotatably supported on the main body of the copying machine 1 in parallel with the rotary shaft 56 and like the rotary shaft 56. A joint portion 58b forming one side of the second coupling (joint means) 58 is fixed to the tip of the rotary shaft 57. The joint portion 58a forming the other side of the second coupling 58 is fixed to one end side of a lift-up shaft (free rotating member) 60 provided in parallel with the rotating shaft 54. A lift plate 40 is fixed to a substantially central portion of the lift-up shaft 60, and the lift plate 40 is rotated by the rotation of the lift-up shaft 60 to lift the sheet feeding portion of the rotary plate 34. . Further, the other end side of the lift-up shaft 60 is merely rotatably supported, and no member is connected to this end portion. A switch actuating piece 60a (shown in FIG. 2) is fixed to a predetermined position of the lift-up shaft 60, and a lift which is turned on / off by the turning of the actuating piece 60a near the switch actuating piece 60a. A detection switch 61 is provided.

The gear group 53, the rotating shaft 54, the first coupling
A drive system for transmitting a drive force to the lift plate 40 is configured by the 55, the rotary shaft 56, the rotary shaft 57, the second coupling 58, and the lift-up shaft 60. Further, the first coupling 55 and the second coupling 58 constitute joint means for separating the drive system in conjunction with the pulling out of the rotary cassette unit 26 (27). The lift-up shaft 60 allows the lift plate 40 to freely rotate by separating the joint means, and causes the lift plate 40 to rotate downward by its own weight to release the sheet lifted state of the rotary plate 34. It is a free rotating member. The joint portion 55b and the joint portion 58b are elastically supported in the axial direction by a coil spring (not shown), and shock absorption at the time of coupling with the joint portions 55a and 58a and securement of the coupled state are achieved. There is.

As shown in FIG. 4, a support base 63 is fixedly installed on the main body of the copying machine 1 at a position above the paper feed section of the rotary cassette 35, and copy paper is placed on the support base 63. A paper feed mechanism 62 for delivering the paper to the supply path 22 is provided. The support base 63 has a cutout portion 63a for allowing a part of the intake roller 65 and the paper feed roller 66 of the paper feed mechanism 62 to protrude from below the support base 63, and a part of the paper return plate 81. A notch 63b for protruding from the lower side of the base 63 and a notch 63c for allowing a part of the pressure contact release lever 76 to protrude from the lower side of the support 63 are formed.

In the paper feeding mechanism 62, while the intake roller 65 is provided above the paper feeding portion of the rotary cassette 35,
The paper feed roller 66 is arranged in parallel with the call-in roller 65 and at a predetermined distance in the feeding direction of the copy paper, and both rollers 65 and 66 are bridged at one end side thereof to form an endless one. The belt 67 rotates in the same direction. A support shaft 65a for rotatably supporting the intake roller 65,
A pair of roller arms 68 are sandwiched between the rotation shaft 66a that transmits the rotation force to the paper feed roller 66 so as to sandwich both rollers 65 and 66.
68 are laterally installed, and the roller arms 68, 68 rotate about the rotary shaft 66a as a fulcrum, and thus the take-in roller 6
By raising and lowering 5, the contact roller 65 is brought into contact with and released from the copy sheet.

Protrusions 68a and 68a are formed at the ends of the roller arms 68 and 68 on the side of the paper feed roller 66.
The roller arms 68, 68 are rotated upward by pressing the 68a, 68a downward by the sheet feeding operation angle 70. The sheet feeding operation aggregate 70 is fixed to one end side of the sheet feeding operation shaft 71, and is rotated with the rotation of the sheet feeding operation shaft 71.

A solenoid connecting plate 72 is fixed to the other end of the sheet feeding operation shaft 71. The operation shaft 73a of the sheet feeding solenoid 73 is connected to the elongated hole formed at the tip of the solenoid connecting plate 72, and the forward / backward movement of the operation shaft 73a is performed by the solenoid connecting plate 72, whereby the sheet feeding operation is performed. It is adapted to be converted into a rotational movement on the shaft 71.

In addition, as shown in FIGS.
A mounting plate 75 is arranged below the 66, and a reverse roller 74 is mounted on the mounting plate 75 for returning the copy paper by feeding in the same direction as the rotation direction of the paper feed roller 66. There is. The mounting plate 75 is provided so as to be rotatable in the up-and-down direction, and by this rotation, the reverse rotation roller 74 is moved toward and away from the paper feed roller 66. Rotating shaft 74 for transmitting rotational force to reverse rotation roller 74
a is disposed below the rotary shaft 66a of the paper feed roller 66 and in parallel with the rotary shaft 66a, and the action piece of the pressure contact release lever 76 having a substantially L shape is provided between the rotary shaft 66a and the rotary shaft 74a. 76a
Is interposed. The pressure contact release lever 76 is provided so as to be rotatable around a shaft 76c in the vertical direction, and is rotated downward to press the reverse rotation roller 74 and separate it from the paper feed roller 66. Has become.

The connecting piece 76b of the press-contact releasing lever 76 is connected to one end side 77a of the press-contact releasing connecting member 77, and the press-contact releasing connecting member 77 rotates horizontally around a shaft 77c (shown in FIG. 4). By doing so, the press contact release lever 76 is rotated. The other end 77b of the press contact release connecting member 77 is connected to a pin of the operating shaft 80a of the paper return solenoid 80, and the press contact releasing connecting member 77 is rotated by driving the operating shaft 80a forward and backward. Has become.

Further, a paper return plate 81 for returning the copy paper to the rotary cassette 35 side is connected to the operation shaft 80a of the paper return solenoid 80. The paper return plate 81 is provided between the intake roller 65 and the paper feed roller 66 so as to be vertically rotatable around a shaft 81a provided above the pin position of the operating shaft 80a as a fulcrum. When the operating shaft 80a is retracted, the copy sheet (not shown) is rotated in the direction of returning it to the rotary cassette 35 side.

A paper detection switch 82 and a paper non-existence detection switch 83 are provided on both sides of the feeding roller 65 on the support base 63, and the operation pieces 82a of the switches 82 and 83 are arranged.
-83a faces below the support base 63 through the notch 63a of the support base 63. Then, the operating pieces 82a ・ 8 of the switches 82 ・ 83
3a is operated by being pushed by the sheet feeding portion of the rotary plate 34 in the lifted state. The rotating plate
In each of the vertical feeding section and the horizontal feeding section of 34, a not-shown notch is formed corresponding to the operating piece 83a of the paper out detection switch 83, and a copy sheet is placed on the rotary plate 34. When there is no sheet, the actuating piece 83a passes through the above-mentioned cutout portion so that it does not turn on and only the sheet detection switch 82 turns on, while in the state where copy sheets are loaded, both the detection switches 82 and 83 turn on by this copy sheet. It is supposed to do.

The operation when the rotary cassette 35 shifts from the horizontal feed state to the vertical feed state will be described with reference to FIGS. 6 (a) to 6 (d).

As shown in (a) of the figure, in the horizontal feed position, the horizontal feed paper feed unit of the rotary cassette 35 is located on the paper feed unit side of the rotary cassette unit 26 (27). The moving block 50 and the holding member 52 that constitute the means are located at one end of the guide shaft 51.

When the driving force of the drive motor 41 is transmitted to the pulley 46 via the first clutch 44, the pulley 46 rotates to rotate the belt 48.
Moves around, and the moving block 50 fixed to the belt 48 is guided by the guide shaft 51 and moves to the other end side, as shown in FIG.

Rotation cassette by linear movement of the moving block 50
35 rotates in the A direction. Here, since the rotary cassette 35 and the moving block 50 are connected and the moving block 50 moves linearly, the center of rotation of the rotary cassette 35 moves, but such movement pivotally supports the rotary cassette 35. The arm 32 is secured by rotating in the D direction with the shaft 31b as a fulcrum. The rotation of the arm 32 in the D direction is performed by the support shaft 50a of the moving block 50 and the support shaft 32a.
This is performed until the angle formed by the line X connecting the line and the guide shaft 51 reaches 90 °.

Next, as shown in FIG. 7C, when the angle between the line X and the guide shaft 51 exceeds 90 °, the rotation direction of the rotary cassette 35 remains A, but the arm 32 is rotated.
Will rotate in the C direction. Then, as shown in FIG. 3D, when the moving block 50 reaches the end of the guide shaft 51, the position detecting switch 101 is operated by the operating piece 50b of the moving block 50. The control unit of the copying machine 1 detects the operation of the position detection switch 101, and the control unit cuts off the transmission of the driving force by the first clutch 44, whereby the movement of the moving block 50 is stopped. In such a state,
The vertical feed unit of the rotary cassette 35 is oriented toward the paper feed side of the rotary cassette unit 26 (27).

On the other hand, the transition from the vertical feed state to the horizontal feed state in the rotary cassette 35 can be performed by rotating the drive motor 41 in the reverse direction and performing the operation reverse to the above operation. In addition,
At the same time when the rotary cassette 35 takes the lateral feed position, the switch actuation piece 52b of the holding member 52 actuates the position detection switch 100. And this position detection switch 10
When the control unit of the copying machine 1 detects the operation of 0 and the control unit cuts off the driving force transmission by the first clutch 44,
The movement of the movement block 50 will be stopped.

Next, the operation of lifting the paper feed unit of the rotary plate 34 will be described. Due to the operation of the second clutch 45, the driving force of the drive motor 41 is changed to the gear group 53 → the rotary shaft 54 → the first coupling 55.
It is transmitted to the rotary shaft 56, the rotary shaft 57, the second coupling 58, and the lift-up shaft 60. The rotation of the lift-up shaft 60 causes the lift plate 40 to rotate. When the lift plate 40 is rotated to the information, the lift plate 40 passes through the notch 33c of the paper feed base 33 and comes into contact with the bottom surface of the rotary plate 34 to lift the paper feed unit of the rotary plate 34. By this lifting, the paper feeding mechanism 62
It is possible to call in the paper by.

Here, when the paper feed unit of the rotary plate 34 is lifted up, for example, it is possible that the paper out detection switch 83 detects that there is no paper, or a jam occurs due to the paper being fed out. It is conceivable that the operator pulls out the rotary cassette unit 26 (27) in order to replenish it. When pulling out the rotary cassette unit 26 (27), the rotary cassette installed in this unit
35, the drive motor 41, and the first and second clutches 44, 45, etc. are all pulled out, while the paper feed mechanism 62, the rotary shafts 56, 57, etc. are located on the main body side of the copying machine 1 as shown in FIG. Will remain. Coupling due to the rotation shafts 56 and 57 remaining
At 55 and 58, the joint portion 55a and the joint portion 55b are separated from each other, and the joint portion 58a and the joint portion 58b are separated from each other, so that the drive motor 41
The transmission of the drive to the lift plate 40 due to is cut off. At the same time, since the lift-up shaft 60 is in a rotation-free state, the lift plate 40 in the lifted state is naturally rotated downward by its own weight, and the rotary plate 34 is lowered to release the paper lifted state. Become. As a result, even if the operator pulls out the rotary cassette unit 26 (27) without noticing that the rotary plate 34 is lifted, the rotary plate 34 descends in conjunction with the pull-out, so that the rotary plate 34 Contact with the paper feeding mechanism 62 is avoided, and the problem of mutual damage can be solved.

Note that the joint portion 55a and the joint portion 55b are separated from each other, and the joint portion
The detachment of the joint portion 58b from the joint 58a can be performed, for example, by rotating
26 (27) is set to occur with 6mm pulled out. FIG. 2 shows a state in which the joint portion is pulled out by 26 mm, and in this state, the joint portions are completely separated from each other.

Further, in the present embodiment, an example in which the rotary plate lifting release mechanism is used in the rotary cassette unit has been shown, but the present invention is not limited to this, and is similarly applicable to a fixed cassette unit that cannot rotate.

〔The invention's effect〕

As described above, the rotary plate lifting / releasing mechanism according to claim 1 stacks sheets and lifts the vertical feed unit or the horizontal feed unit according to the rotation of the rotary cassette. A rotatable plate, a lift plate vertically rotatably arranged below the rotary plate in order to lift the vertical feed paper feed unit or the horizontal feed paper feed unit of the rotary plate, and the lift plate. A first driving force for rotating,
A drive source that generates both a second drive force for rotating the rotating cassette and a drive system that transmits the first drive force are provided in the middle of the drive source, and are linked to the drawer of the cassette unit from the apparatus body. And a coupling means for separating the drive system and the drive system, which allows the lift plate to freely rotate in accordance with the separation of the drive system, and causes the lift plate to rotate downward by its own weight. And a free rotation member for releasing the lifted state of the vertical feed unit or the horizontal feed unit of the rotary plate are respectively provided in the cassette unit.

Therefore, when the cassette unit is pulled out from the main body of the apparatus, the rotary plate, the lift plate, the drive system, the joint means, and the free rotating member are all pulled out from the main body of the apparatus, and the vertical feeding unit or the horizontal feeding unit of the rotary plate is used. The releasing operation of the lifted state of the paper portion is performed in the cassette unit by the above means. That is, when the cassette unit is pulled out from the main body of the apparatus for jam clearance or sheet replenishment when the rotary plate is lifted, the first driving force is not transmitted in the drive system in conjunction with this pulling operation, Since the lift plate freely rotates downward by its own weight and the lifted state of the vertical feed unit or the horizontal feed unit of the rotary plate is released in the cassette unit, the paper feed unit of the rotary plate is It is possible to reliably avoid a situation in which the leading end and the paper feeding mechanism provided on the main body of the copying machine come into contact with each other to cause mutual damage.

In addition, the second drive force for rotating the rotary cassette and the first drive force for rotating the lift plate are generated by the same drive source, so that it is better than the case where separate drive sources are provided. The number of drive sources can be reduced. Moreover, since the means necessary for each operation of the rotation of the rotary cassette and the lifting of the lift plate, and the lift release mechanism of the rotary plate are respectively provided in the cassette unit,
To that extent, there is also an effect of making a space in the apparatus main body side.

The cassette unit according to claim 2 stacks sheets, and a rotary plate provided with a vertical feeding paper feeding unit or a horizontal feeding paper feeding unit that can be lifted according to the rotation of the rotary cassette; A lift plate that is vertically rotatably arranged below the rotary plate to lift the vertical feed paper feed unit or the horizontal feed paper feed unit of the rotary plate, and a first driving force for rotating the lift plate. , A drive source that generates both a second drive force for rotating the rotary cassette.

Therefore, since the second drive force for rotating the rotary cassette and the first drive force for rotating the lift plate are generated by the same drive source, it is better than the case where separate drive sources are provided. The number of drive sources can be reduced. Moreover, since all means necessary for each operation of the rotation of the rotary cassette and the lifting of the lift plate are provided in the cassette unit, there is an effect that a space is created in the apparatus main body side.

[Brief description of drawings]

1 to 6 show an embodiment of the first invention. FIG. 1 is a perspective view showing a rotary cassette unit. FIG. 2 is a plan view showing a state in which the joint portions of the first coupling and the second coupling are separated by pulling out the rotary cassette unit. FIG. 3 is a front view showing a schematic internal mechanism of the copying machine. FIG. 4 is a plan view showing the paper feeding mechanism. FIG. 5 (a) is a side view of the paper feed mechanism, and FIG. 5 (b) is a side view showing a state in which the paper return plate and the like are operated in FIG. 5 (a). 6A to 6D are plan views showing the rotating operation of the rotating cassette. 26 and 27 are rotary cassette units, 34 is a rotary plate, 35 is a rotary cassette, 40 is a lift plate, 53 is a gear group, 54 is a rotary shaft, 55 is a first coupling (joint means), and 58 is a second coupling. (Joint means), 60 is a lift-up shaft (free rotating member).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-2-295827 (JP, A) Actually open 63-4934 (JP, U) Actually open 63-194824 (JP, U)

Claims (2)

(57) [Claims] 1. A rotary plate lift release mechanism provided to a cassette unit having a rotary cassette, which is detachably attached to the main body of the apparatus, and stacks sheets, and responds to the rotation of the rotary cassette. A rotating plate in which the vertical feed unit or the horizontal feed unit is arranged to be lifted up, and a vertical rotation below the rotating plate to lift the vertical feed unit or the horizontal feed unit of the rotary plate. A freely arranged lift plate; a drive source that generates both a first drive force for rotating the lift plate and a second drive force for rotating the rotary cassette; It is provided in the middle of the drive system that transmits the driving force,
Joint means for separating the drive system in conjunction with the pulling out of the cassette unit from the apparatus body; and the drive system, which is provided in the drive system and allows the lift plate to freely rotate with the separation of the drive system. And a free rotation member for rotating the rotation plate downward by its own weight to release the lifted state of the vertical feeding unit or the horizontal feeding unit of the rotary plate, respectively. Lifting mechanism for rotating plate. 2. A cassette unit which is detachably provided to the main body of the apparatus and has a rotatable cassette, wherein sheets are stacked and a vertical feed unit or a vertical feed unit is provided according to the rotation of the rotatable cassette. A rotary plate in which a horizontal feed unit is arranged so that it can be lifted up, and a lift that is vertically rotatable below the rotary plate to lift the vertical feed unit or the horizontal feed unit of the rotary plate. A cassette unit comprising a plate and a drive source that generates both a first drive force for rotating the lift plate and a second drive force for rotating the rotary cassette.