JP3503011B2 - Sheet stacking device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacking device for receiving and stacking sheets such as planographic printing plates discharged from a dryer of an automatic developing device for planographic printing plates, and more particularly to a stacking device for handling sheets. It has an upward slope that receives and guides one sheet discharged and dropped.
A transfer member that is rotationally displaced so that the upward slope is a downward slope, and is then displaced back so as to return to the original upward slope, and an upward slope that receives sheets from the rotationally displaced transfer member and supports them in a stacked state. And a stacking member having a sheet stacking device.

[0002]

2. Description of the Related Art A basic sheet stacking device as described above is one in which only a contact pressure or a frictional force acts on a sheet with an upward slope of a transfer member having a constant inclination angle. Therefore, when the length of the sheet in the conveyance direction is short and the drop length is long, the falling speed of the sheet guided by the upward slope and falling becomes too fast, and the lower end contacts the upward surface of the stacking member and stops. There was a problem that the corners could be deformed. In order to solve the problem, a suction nozzle is provided in the transfer member, a sheet guided by the transfer member and descending is adsorbed by the suction nozzle, and then the transfer member is rotationally displaced so that its upward surface is a downward surface. A sheet stacking device that is configured to release the suction of a suction nozzle and transfer the sheet to a stacking member is known from Japanese Utility Model Laid-Open No. 4-94357. However, the device requires moving means of the suction nozzle, which complicates the device, and if the timing of sucking the sheet of the suction nozzle is delayed, the lower end of the sheet is rather strongly applied to the upward surface of the stacking member to be deformed. There is a problem to say.

Therefore, as a solution to the above problem, the present applicant first provided a plurality of ventilation holes on the upward slope of the transfer member, and communicated the ventilation holes to the exhaust fan via a duct to transfer the ventilation holes. When a member receives a sheet, we developed a sheet stacking device that drives an exhaust fan and sucks air through a ventilation hole to provide resistance to the sheet falling. This device is filed by Japanese Patent Application No. 5-236761. However, in this device, even if the seat that has been prevented from sliding down by the intake of the ventilation hole is stopped even if the intake of the ventilation hole is stopped or the air is blown out from the ventilation hole, that is, exhausted, It is difficult for the tip to come into contact with the upper surface of the stacking member in a certain state and after that, it is not possible to smoothly move the transfer member to the stacking member side. However, there is a problem that the delivery operation may be interrupted.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a sheet once slipped off by the intake of the ventilation hole of the transfer member is stopped from the intake of the ventilation hole. Alternatively, the sheet stacking device can be easily slid down again by exhaust air to be in a certain state in which the lower end is brought into contact with the upward surface of the stacking member, and therefore the transfer of sheets from the transfer member to the stacking member side is also smoothly performed. For the purpose of provision.

[0005]

According to the present invention, there is provided a guide surface for receiving and discharging one sheet discharged from a sheet handling device according to claim 1, and a guide surface below the guide surface. It has an adsorption surface that adsorbs the sheet and stops sliding by inhaling from the intake port that opens on the surface,
A transfer member that reciprocally rotates from a state in which the guide surface and the suction surface are inclined upwards to a state in which the guide surface and the suction surface are changed downward, a role of engaging the leading end of the sliding sheet to stop the sliding, and the guide surface and the suction surface. What is claimed is: 1.A sheet stacking device, comprising: a stacking member having an upward slope that serves to receive a sheet from a transfer member that has been turned into a downward slope and support the sheet in a stacked state. At least the suction surface above the uppermost edge of the intake port is separated from the extension of the guide line to be slid down, and the seat sucked by the intake air of the intake port is elastically bent.
The above object is achieved by a structure characterized by being bent .

That is, in the sheet stacking device of the first aspect, the suction surface above the uppermost edge of the intake port is separated from the extension of the guide line for sliding the sheet on the guide surface of the transfer member. The state where the sheet is adsorbed to the adsorption surface by the intake air from the intake port is a state in which the sheet is elastically bent and deformed. Therefore, when the intake of the intake port is stopped, elastic recovery force is applied to the sheet, the sheet closes without adhering to the suction surface or the guide surface without sliding, and the sheet slides down to hit the upper slope of the stacking member. They come into contact with each other and are stopped, so that they can take a certain state. Therefore, the subsequent transfer of the sheets to the stacking member in a rotating state in which the guide surface and the suction surface of the delivery member are inclined downward can be smoothly performed.

Further, the structure of claim 2 is characterized in that the extension of the guide line for sliding the seat of the guide surface is in contact with the suction surface below the uppermost edge of the intake port. As a result, it becomes easy to stop the sliding of the seat by the intake of the intake port,
Therefore, it is possible to easily restart the sliding of the seat by stopping the intake.

In addition to the structure of claim 1 or 2, the structure of claim 3 characterized in that the intake port is an intake / exhaust port for not only intake but also exhaust
Resumption of sliding of sheets on the transfer member and transfer of sheets from the transfer member to the stacking member can be performed more easily.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic side view showing an example of a sheet stacking device of the present invention, FIG. 2 is a partial front view showing a delivery member, FIG. 3 is a partial view of FIG. 1 showing a main part, and FIG. 4 is a sheet. 6 is a time chart of sensor detection and control of drive motor control means.

In FIG. 1 to FIG. 3, 101 is an automatic developing device for lithographic printing plates, 102 is a dryer connected to the automatic developing device 101, and S is one sheet discharged from a discharge port of the dryer 102 by a discharge roller 103. A sheet of the planographic printing plate, 1 is a base of the sheet stacking device, 2 is a transfer member, 3 is a rotation center axis of the transfer member 2, and 4 is a bearing provided on the base 1 of the rotation center axis 3, Reference numeral 5 is a driven shaft of the transfer member 2, and 6 is an action link rotatably engaged with the driven shaft 5 at one end side and rotatably engaged with a shaft pin 8 planted in the crank arm 7 at the other end side. . Reference numeral 9 is a crank shaft that rotates integrally with the crank arm 7, 10 is a crank shaft gear that is integral with the crank shaft 9, and 11 is a bearing provided on the base 1 of the crank shaft 9,
Reference numeral 12 is a motor provided on the base 1 having a motor shaft gear 13 meshing with the crank shaft gear 10. 14 is the base 1
It is a loading member fixed to.

The speed of the sheet S sliding on the guide surface 20 forming the upward slope of the surface of the transfer member 2 away from the discharge roller 103 of the dryer 102 is increased, and the lower end is vigorously moved to the upward slope of the stacking member 14. In order to prevent collision and deformation such as corner breakage, the transfer member 2
A large number of intake / exhaust ports 21 are provided on the surface below the guide surface 20, and a duct 17 connected to the exhaust fan 15 and the blower 16 is provided on the rear surface, and the surface serves as the suction surface 22. When the sheet sensor 18 including the light emitting element 18a for infrared light or the like provided on the upper end side of the sheet and the light receiving element 18b provided on the upper end side of the delivery member 2 detects the sheet S, the drive motor control means uses the information to detect the sheet S. As shown in FIG. 5, the exhaust fan 15 is driven, whereby the intake / exhaust port 21 takes in air to adsorb the sheet S to the adsorbing surface 22 and stop the sliding of the sheet S.

The delivery member 2 in the illustrated example has a guide surface 20
In order to reduce the contact area with the sheet S and prevent the surface of the sheet S from being scratched by friction, the surface of the liner made of resin or the like provided on a flat surface is used, but not limited to this.
The guide surface 20 may be a flat surface. Also, the suction surface 2 of FIG.
The two intake / exhaust ports 21 are arranged in the width direction of the transfer member 2 and arranged in two rows in the sliding direction of the sheet S, but the arrangement is not limited to this, and the intake / exhaust ports 21 may be one row or three rows. The above or a staggered arrangement may be used. Further, instead of connecting the exhaust fan 15 and the blower 16 to the duct 17, the intake air and the exhaust air may be switched by using one fan, for example, an axial flow exhaust fan capable of reversing the air blowing direction by forward / reverse rotation of a motor. . Further, the suction surface 22 is preferably provided with an intake / exhaust port 21 that also performs exhaust in order to transfer the sheet from the transfer member 2 to the stacking member 14, but the duct 17 has no connection of the blower 16 and intake air. It may have an intake port for performing only.

What is important is that, as clearly shown in FIG.
The guide surface 20 of the delivery member 2 separates the portion 22a of the suction surface 22 above the uppermost edge 21a of the intake / exhaust port 21 from the extension 20a of the guide line that slides down the sheet S. As a result, the sheet S, which has been sucked by the suction / exhaust port 21 and adsorbed to the adsorbing surface 22 and prevented from sliding down, is elastically deformed. Therefore, in order to shift the sheet S from the transfer member 2 to the stacking member 14, the blower 15 is stopped to stop the intake of the intake / exhaust port 21, or the blower 16 is further driven to exhaust from the intake / exhaust port 21. The elastic recovery force is applied to the sheet S, so that the sheet S is easily released from the close contact with the guide surface 20 and the suction surface 22 and slides down so that the lower end is brought into a certain state in which the lower slope is brought into contact with the upward slope of the stacking member 14. become. Therefore, thereafter, the transfer member 2 can be easily moved to the stacking member 14 side by rotating the transfer member 2 so that the guide surface 20 and the suction surface 22 are inclined downward.

Furthermore, the extension 2 of the guide line of the guide surface 20
0a contacts the suction surface 22 below the uppermost edge 21a of the suction / exhaust port 21 of the suction surface 22, the lower end of the sheet S passes between the contact position and the arrangement position of the suction / exhaust port 21, The sheet S is strongly adsorbed to the adsorbing surface 22 by the intake of the exhaust port 21, so that the sliding down is surely stopped.

In the example of FIG. 4, the seat sensor 18
Detects the sheet S, the drive motor control means drives the air exhauster 15 based on the information, and then the lower portion of the guide surface 20 of the transfer member 2 when the time t1 which changes depending on the length in the moving direction of the sheet S has elapsed. A sensor 19 including a light emitting / receiving element provided on the lower end side of the suction surface 22 detects the sheet S, and the drive motor control is performed by a timer included in drive motor control means for starting the time measurement based on the detection information for t2 hours. Means stops the drive of the exhaust fan 15, and the drive motor control means rotates the motor 12 by the time t3 longer than the time t2 of the same timer to move the transfer member 2 by the crank mechanism from the solid line position in FIG. It is designed to be rotated to the position indicated by the chain line.

Thereby, the guide surface 2 of the transfer member 2
0 and the suction surface 22 change from the upward slope to the downward slope, and the sheets S are smoothly transferred from the transfer member 2 to the upward slope of the stacking member 14 without being damaged on the lower end side and stacked. A hook portion 14 a that receives the lower end of the sheet S is provided at the lower end of the stacking member 14. In order to more easily transfer the sheet S to the stacking member 14, the drive motor control means drives the blower 16 to stop the blower 15 from rotating the motor 12 to rotate the motor 12 to suck and exhaust the air. I am trying to exhaust from. The drive motor control means stops the transfer member 2 at the two-dot chain line position for a predetermined time when the transfer of the sheet S to the stacking member 14 is completed, and then rotates the motor 12 to return it to the solid line position. Thereby, the transfer member 2 can receive the next sheet S.

Not limited to the example of FIG. 4, the sheet S is adsorbed by the adsorbing surface 22 by the intake of the air exhaust port 21 and the exhaust fan 15 driven by the information detected by the sensor 18 for detecting the sheet S is sufficiently stopped. After a lapse of a predetermined time, the blower 16 is driven, the sheet S slides down again, and the motor 12 rotates based on the information detected by the sensor 19 provided on the lower end side of the suction surface 22. Then, the transfer member 2 is rotated from the solid line position in FIG. 1 to the two-dot chain line position, and the motor 12 is rotated again after a predetermined time period in which the transfer of the sheets S to the stacking member 14 is reliably completed. Can be returned to the solid line position and the blower 16 can be stopped while the transfer member 2 is at the two-dot chain line position or before and after that, the same effect can be obtained. The driving of the blower 16 is stopped after a sufficient time has elapsed for the transfer of the sheet S to the stacking member 14 side due to the movement of the transfer member 2 to the two-dot chain line position, and to the solid line position of the transfer member 2. Stop at an appropriate time before starting the return rotation of. Thereby, the transfer of the sheet S from the transfer member 2 to the stacking member 14 can be surely and quickly performed.

It should be noted that the delivery member 2 that has received the sheet S may not be rotated toward the stacking member 14 due to the size of the sheet S or other circumstances. The drive start of the blower 16 for peeling from the member 2 may be transferred based on the information detected by the detection means that the rotation of the transfer member 2 is started. However, as mentioned above, the present invention is not limited to using a blower.

[0020]

According to the seat stacking device of the present invention, a seat which has been prevented from sliding down by the intake air of the upward slope of the transfer member is easily slid down again by the stop of the intake air of the intake port and the lower end. Is brought into contact with the upward slope of the stacking member, so that the sheet is smoothly transferred from the transfer member to the stacking member by the rotation of the upward slope of the transfer member as the downward slope. Can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an example of a sheet stacking and stacking device of the present invention.

FIG. 2 is a partial front view showing a transfer member.

FIG. 3 is a partial view of FIG. 1 showing a main part.

FIG. 4 is a time chart of the detection of the sheet sensor and the control of the drive motor control means.

[Explanation of symbols]

101 Planographic printing plate automatic developing device 102 dryer S sheet 1 base 2 Delivery member 3 rotation center axis 4,11 bearing 5 Driven shaft 6 Action link 7 crank arms 9 crankshaft 12 motors 14 Loading member 15 blower 16 blower 17 ducts 18, 19 sheet sensor 20 guideway 20a Guide line extension 21 Intake and exhaust port 21a top edge 22 Adsorption surface

Claims (4)

(57) [Claims] 1. A guide surface for receiving one sheet discharged from a sheet handling device and sliding it down, and sucking a sheet by sucking air from an air inlet opening below the guide surface. A transfer member having a suction surface for stopping slipping and reciprocally rotating from a state in which the guide surface and the suction surface are inclined upward to a state in which the suction surface is inclined downward; and Stacking of sheets having a role of stopping and a stacking member having an upward slant surface that fulfills the role of receiving the sheet from the transfer member that is rotated in a state where the guide surface and the suction surface are inclined downward and supporting the sheet in a stacked state A device, wherein at least the suction surface above the uppermost edge of the intake port is separated from the extension of the guide line that slides the sheet of the guide surface ,
The seat adsorbed by the intake air from the intake port is elastically bent.
A sheet stacking device characterized by being shaped . 2. The sheet stacking device according to claim 1, wherein the extension of the guide line for sliding the sheet on the guide surface contacts the suction surface below the uppermost edge of the intake port. 3. The intake port as claimed in claim 1, wherein the intake port is not only an intake port but also an exhaust port for exhausting air.
The sheet stacking device described in. 4. The sheet stacking device according to claim 1, wherein the device that handles the sheet is an automatic lithographic printing plate developing device, and the sheet is a lithographic printing plate. .