JPH02310250A - Paper loading device - Google Patents

Abstract

PURPOSE:To impede movement of a positioning unit at the time of stack action so as to improve stack accuracy by selectively actuating a movement impeding mechanism which impedes the movement of the paper positioning unit of a paper loading device. CONSTITUTION:When paper 12 is stacked in a paper loading device 11, a solenoid 58 is turned on, and a turn lever 53 is turned in the counter clockwise direction against a tension spring 55. An elastic member 52 is detached from a driven pulley 41. Next an electromagnetic clutch 43 is turned on, thereafter a step motor 46 is driven to rotate the first idler gear 44 in a direction R, and a drive belt 39 is moved in a direction C. Thus in accordance with paper size, a paper positioning unit 32 is moved to a suitable position. Thereafter the solenoid 58 is turned off, the elastic member 52 is pressed to the pulley 41 by urging force of the spring 55, and movement of the unit 32 is impeded by preventing movement of the belt 39, simultaneously the clutch 43 is turned off so as to prevent drive power of the step motor 46 from being transmitted to a drive pulley 40.

Description

[Detailed description of the invention] Industrial advantage This invention is connected to a recording device such as a printer, a copying machine, a printing machine, or a facsimile machine, and the recorded paper ejected from the recording device is placed on a paper holder. The present invention relates to a paper stacking device that positions and sequentially stacks paper.

BACKGROUND ART Conventionally, in this type of paper loading device, a paper positioning unit is moved to an appropriate position according to the paper size, and when a recorded paper is sent onto a paper holder, a transport roller is installed in the unit. The paper is transported from the retracted position to the transport position, and is positioned and stacked on the paper holder by abutting against a positioning stopper also provided in the unit.

The problem to be solved by the invention is that when a recorded paper is sent out onto the paper holder, the conveying roller must be moved to the retreat position for each paper so as not to hit the paper. Then, after the paper passes under the conveyance rollers, it falls onto the recorded paper again, and the conveyance rollers are set at the conveyance position. Then, the paper is transported by the transport rollers, hits the positioning stopper, and then returns to the retracted position. In this way, since the conveyance roller reciprocates between the conveyance position and the retreat position for each sheet, the sheet positioning unit moves little by little due to the vibration. As the number of stacked sheets increases, a misalignment occurs between the upper and lower portions, and the stacking condition gradually deteriorates.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate such conventional drawbacks in paper stacking devices and to improve stacking accuracy by preventing movement of a paper positioning unit during stacking operation.

Means for Solving the Problems Therefore, in the present invention, as shown in the illustrated embodiment below, for example, the paper positioning unit 32 is provided with a positioning stopper 33a, and the conveying rollers 37 are provided so as to be movable between the conveying position and the retreat position. .

The unit 32 is moved to an appropriate position according to the paper size, and when the ejected paper 12 is sent out onto the paper holder 15, the transport roller 37 is moved from the retracted position to the transport position to transport the ejected paper 12, The positioning stopper 33
The paper stacking device 11 that positions and stacks the paper on the paper holder 15 by abutting against the paper holder 15 is characterized in that a movement prevention mechanism S that prevents the movement of the paper positioning unit 32 is selectively operable.

Operation Then, during stacking operation, the movement prevention mechanism S is activated to prevent movement of the sheet positioning unit 32.

Example Hereinafter, the present invention will be described in detail with reference to the drawings.

In FIG. 5, reference numeral 10 is a recording device such as a printer, copying machine, printing press, or facsimile.

Reference numeral 11 denotes a paper loading device according to the present invention, which is connected to the recording device 10. Then, the recorded sheets 12 discharged from the recording device 10 are fed by a conveying roller 13 and a driven roller 14 that presses against them, and are positioned on a sheet holder 15 and stacked one after another.

As shown in FIG. 1, the paper stacking device 11 includes a box-shaped paper tray frame 17 that is open at the top.

In the paper tray frame 17, the paper tray 15 described above is installed horizontally. The paper holder 15 is attached to the paper holder elevating mechanism P. That is, both sides of the paper holder 15 are supported by arms 18 and 19 of the paper holder elevating mechanism P. One arm 18 is attached to a lifting belt 2o, and the other arm 19 is attached to another lifting belt 21. The lifting belt 20 has two pulleys 22 and 23.
Pass the time. One side of the connecting belt 24 is also hung on one of the pulleys 23. The other side of the connecting belt 24.

Hang it on another pulley 25. The pulley 25 has a gear 2
6 are installed coaxially. One pulley 23 is attached to the drive shaft of the motor 27. On the other hand.

The lifting belt 21 is passed between two pulleys 28 and 29. One of the pulleys 29 is coaxially provided with another gear 30 that meshes with the gear 26. Then, the motor 27 is activated to drive the sheet tray lifting mechanism P. That is, when the motor 27 is driven to rotate the pulley 23 in the R direction, one of the lifting belts 20 is moved in six directions, and the connecting belt 24 is moved in the A direction. Therefore, gear 26.3
The other lifting belt 21 also moves in six directions through zero engagement. Then, the paper tray 15 is lowered.

On the other hand, when the motor 27 is reversely driven to rotate the pulley 23 in the L direction, one of the lifting belts 20 is moved in the B direction, and the connecting belt 24 is moved in the B direction. Therefore, the other lifting belt 21 also moves in the B direction through the meshing of the gears 26 and 30. Then, the paper holder 15 is raised. Thereby, the paper pedestal elevating mechanism P can move the paper pedestal 15 up and down according to the stack amount.

Now, on such a paper holder 15, a paper positioning unit 32 is provided which stacks the recorded papers 12 from the recording device 10 in an orderly manner on the paper holder 15. The paper positioning unit 32 includes a frame 33 having a positioning stopper 33a, a solenoid 34 attached to the frame 33, a rotating lever 36 that rotates about a shaft 35 by the solenoid 34, and one end of the rotating lever 36. and conveyor rollers 37 attached to the conveyor rollers 37. Then, the single-turn lever 36 is rotated by the operation of the solenoid 34, and the conveying roller 37 is made freely movable between the conveying position and the illustrated retracted position. Such a paper positioning unit 32 is movably supported by a positioning unit moving mechanism Q. That is,
The paper positioning unit 32 is movable in the paper transport direction (left and right in the figure) by a pair of parallel guide shafts 38 of the positioning unit moving mechanism Q. Guide shaft 38
A drive belt 39 is placed above and parallel to it, and a frame 33 of the paper positioning unit 32 is attached to it. The drive belt 39 has a drive pulley 40 and a driven boob 114.
Kake is passed in 1 hour. A drive mechanism R is connected to the drive pulley 41.

The drive mechanism R includes an electromagnetic clutch 4 coaxial with the drive pulley 4o.
3, a first idler gear 44 that transmits rotation to the drive pulley 40 via the electromagnetic clutch 43, and a step motor 46 in which the first idler gear 44 and the drive gear 45 mesh. A second idler gear 47 is meshed with the drive gear 45 via the first idler gear 44 . A roller gear 48 meshes with the second idler gear 47 . The roller gear 48 is coaxially provided with a conveyance roller 13 shown in FIG. Then, on the conveyance roller 13,
The driven roller 14 is pressed as shown in FIG.

On the other hand, a movement prevention mechanism S is provided on the opposite side of the drive belt 39 from which the drive mechanism R is provided.

The movement prevention mechanism S includes a driven pulley 41 as shown in FIG.
An elastic member 52 that is pressed against or pulled away from the elastic member 52 as shown in FIG. It has a tension spring 55 that biases the movable lever 53 clockwise in the figure, a connecting member 56 attached to the other end of the rotary lever 53, and a solenoid 58 that attaches the operating rod 57 to the connecting member 56.

In the normal state, the biasing force of the tension spring 55 causes the second
As shown in the figure, the elastic member 52 is pressed against the driven pulley 41. From this state, the paper 12 is placed inside the paper stacking device 11.
When stacking, the solenoid 58 is turned on and the rotating lever 53 is rotated counterclockwise in the figure against the tension spring 55. Then, as shown in FIG. 3, the driven pulley 41
The elastic member 52 is pulled away from the body. Then, after turning on the electromagnetic clutch 43, the step motor 46 is driven to rotate the first idler gear 44 in the R direction, and the drive belt 3
9 in the C direction. Due to this.

The paper positioning unit 32 is moved to an appropriate position (for example, the position shown in FIG. 4) depending on the paper size. Thereafter, the solenoid 58 is turned off, and as shown in FIG. 2, the elastic member 52 is pressed against the driven pulley 41 by the biasing force of the tension spring 55, thereby preventing movement of the drive belt 39 and preventing movement of the paper positioning unit 32 . At the same time, the electromagnetic clutch 43 is turned off to prevent the driving force of the step motor 46 from being transmitted to the drive pulley 40. Thereafter, the step motor 46 is now reversely driven to rotate the first idler gear 44 in the L direction, and the conveyance roller 13 is rotated counterclockwise in the figure via the second idler gear 47 and roller gear 48. As a result, the ejected paper 12 sent from the recording device 2!10 is sent onto the paper holder 15. Then, when the trailing edge of the paper 12 is detected by the paper detection sensor 60, the solenoid 34 is turned off, the rotary lever 36 is rotated, and the transport rollers 37 fall onto the paper 12 to the transport position.

Thus, the step motor 4 is
6 is transmitted to rotate the conveying roller 37 to convey the paper 12 and abut the leading edge of the paper 12 against the positioning stopper 33a, positioning and stacking the paper 12 on the paper holder 15. Thereafter, the solenoid 34 is actuated to rotate the rotary lever 36 so that the primary ejected paper does not hit the conveying roller 37, and the conveying roller 37 is temporarily returned to the retracted position. Then, the conveyance roller 13 transfers the next ejected paper to the paper holder 1.
5, and the trailing edge of the paper 12 is detected by the paper detection sensor 60.
When this is detected, the solenoid 34 is turned off again, the rotary lever 36 is rotated, and the conveying roller 37 falls onto the paper 12 to the conveying position. Then, the rotation of the step motor 46 is transmitted to rotate the conveying roller 37 to convey the paper 12 and abut the leading edge of the paper 12 against the positioning stopper 33a, positioning and stacking the paper 12 on the paper holder 15. .

By repeating this process, as shown in FIG.
The sheets 12 can be stacked one on top of the other.

After the paper 12 is stacked, or after the paper 12 is stacked,
After detecting that the solenoid 58 is full, the solenoid 58 is turned on and the rotating lever
3 to separate the first elastic member 52 from the driven booby U41, resulting in the state shown in FIG. However, f! ! The magnetic clutch 43 is engaged to drive the step motor 46 and rotate the first idler gear 44 in the L direction. As a result, the drive belt 39 is moved in the D direction and the paper positioning unit 3
Return 2.

The home position sensor 61 detects the unit 32
Stop at the home position.

After taking out the stack paper 12, the paper loading device [
When stacking the paper 12 in the paper 11, the step motor 46 moves the paper 12 based on its home position, and the paper positioning unit 32 is stopped at a position corresponding to the next paper size. According to this invention, during the stacking operation, the movement prevention mechanism is activated to prevent the paper positioning unit from moving, so that the paper can be accurately positioned on the paper holder and stacked one after another, improving stacking accuracy. .

Further, it is possible to prevent the paper positioning unit at the home position from moving and hold the unit in a position where it does not interfere with taking out the stack of paper.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall schematic diagram of a paper loading device which is an embodiment of the second invention. 2 and 3 are diagrams of the movement prevention mechanism in the paper stacking device, in which FIG. 2 shows a state in which movement of the paper positioning unit is prevented, FIG. 3 shows a state in which movement is possible, and FIG. The figure is a stacking operation state diagram of the paper stacking device shown in FIG. 1. FIG. 5 is an explanatory diagram of the usage state.

11... Paper loading device, 12...
...Paper, 15...Paper holder, 32
......Paper positioning unit, 33a...
......Positioning stopper, 37...
...Transportation roller, S...Movement prevention mechanism.

Claims (1)

[Claims] A paper positioning unit is provided with a positioning stopper, and a transport roller is movable between a transport position and a retreat position, and the unit is moved to an appropriate position according to the paper size, and the ejected paper is sent out onto a paper holder. In a paper stacking device that moves the transport roller from a retracted position to a transport position to transport the ejected paper, and positions and stacks the paper on the paper holder by abutting against the positioning stopper, the movement prevents movement of the paper positioning unit. A paper loading device comprising a selectively operable blocking mechanism.