JPH1134294A - Sheet delivering apparatus for sheet rotary printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent dropping or irregular alignment of sheets from a pile by altering a set position in the same direction in a high speed range by altering a set position in a high speed range of a sheet release member by a controller, and automatically altering the set position by changing a thickness of the sheets. SOLUTION: Sheet delivery pawl members 7 for gripping and conveying a sheet 9 between right and left sheet-delivery chains 6 feeding in a direction C are supported at a predetermined interval. And, sheets released by the members 7 fed by a sheet-releasing mechanism 10 are loaded on a pile 8, and aligned at ends of the sheets on the way of dropping by a sheet contact 11. A sheet-release cam of the mechanism 10 is moved by movement of the chains 6, thereby opening/closing pawls of the members 7 to grip/release the sheet. When this controller 45 sets a position of the cam in a low speed range by low speed range input unit, it sets a function for deciding the position of the cam in a high speed range. When change of the low speed range to the high speed range is sensed by an encoder, sheet-releasing position of the cam is switched to setting in the high speed range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet discharging device for a sheet-fed rotary printing press.

[0002]

2. Description of the Related Art In a sheet-fed rotary printing press, paper printed by a printing device is changed from a nail of a printing cylinder to a discharge nail of a discharge chain, and is conveyed along with the travel of the discharge chain. The sheet is released from the sheet discharge claw by being opposed to the sheet release cam at the end portion, and is dropped and stacked on the pile of the sheet discharge device. Then, when the speed of the printing press is switched from a low speed range to a high speed range, the paper released from the paper ejecting claws is strongly hit by the paper contact of the pile due to its inertia, and the paper alignment is properly performed. There is a risk of not being done or falling over the pile after getting over. For this reason, in the high-speed range, the paper release position is set to be distant from the paper contact in accordance with the machine speed.

That is, the paper release cam can be moved along the paper transport direction, and the printing machine main body stores the movement position of the paper release cam in the low-speed range of the printing machine, that is, the paper release position. And a high-speed storage unit for storing the paper release position in the high-speed range. FIG. 9 is a diagram for explaining the paper release positions stored in these storage units. The straight line A1 indicates the paper release position in the low-speed range. In the low-speed range, the paper release position is always a fixed position. This is performed in a1, and when the operator presses the low-speed range setting operation button, the paper release cam moves to a1.

The high-speed storage section stores the position a2 of the paper release cam at the maximum speed v2 of the machine, and the amount of movement of the paper release position in the high-speed region is substantially proportional to the machine speed. Therefore, in the control device of the printing press, the paper release position in the high-speed region is calculated by the function of the straight line A2 connecting the paper release position a1 in the low-speed region and the paper release position a2 at the maximum speed. Is set. That is, when it is detected by the encoder for detecting the machine speed that the machine speed has reached the switching speed v1, the control device switches the setting of the paper release position from the straight line A1 to the straight line A2. Based on the function, the paper release position is controlled to move so as to correspond to the main unit speed detected by the encoder that detects the main unit rotation.

[0005]

The above-mentioned paper release position needs to be changed not only by the speed of the apparatus but also by the weight of the paper. That is, since the weight increases when the paper is changed from thin paper to thick paper, the inertia force of the paper that is released from the ejection claw and falls increases, and in this case, it is necessary to move the paper release position away from the paper contact. . That is, as shown by the straight line B3 in FIG. 10, the paper release position in the low speed range is changed from a1 to b3.
Has been moved to. Therefore, the paper release position in the high-speed region is controlled based on a function represented by a straight line B4 connecting the paper release positions a2 and b3 at the maximum speed v2 when the thin paper is stored in the storage unit for the high-speed region. doing.

However, if the amount of change in the weight of the thick paper is large, the paper release position in the low-speed range becomes smaller than the paper release position a2 in the high-speed range of the thin paper as indicated by b1 in FIG. growing. For this reason, when the paper release position of the thick paper exceeds the switching speed v1, the higher the speed is, as represented by the straight line B2 'connecting b1 and a2, the opposite direction to the original, that is, As a result, the cardboard comes close to the contact, and the cardboard hits the paper contact strongly, getting over the paper contact and falling from the pile. As a solution to this problem, there has been proposed a device that can variably set a paper release position in a high-speed region of thick paper.
Since the setting for the low-speed range and the setting for the high-speed range are different, not only is the setting complicated, but if the setting in the high-speed range is forgotten, the same problem as described above has occurred.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to prevent the paper from dropping from the pile and the irregularity of the paper regardless of the speed of the machine and the thin paper or thick paper. An object of the present invention is to provide a sheet discharging device for a sheet-fed rotary printing press.

[0008]

In order to achieve this object, a sheet discharging device of a sheet-fed rotary printing press according to the present invention includes a paper holding device provided on a transport chain for holding paper, and a paper holding device provided with the paper holding device. A paper release member that releases the paper grip,
A paper discharge loading device for loading the paper released from the paper holding device, and a control device for setting the position of the paper release member in the high speed region in accordance with the printing speed in accordance with the set position of the paper release member in the low speed region In a sheet discharging device of a sheet-fed rotary printing press provided with
The control device changes the set position of the paper release member in the high speed range in the same direction as the change of the set position of the paper release member in the low speed range. Therefore, when the setting position of the paper release member in the low speed range is changed in accordance with the change of the paper thickness, the set value in the high speed range is automatically changed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a sheet discharging device of a sheet-fed rotary printing press according to the present invention, FIG. 2 is a side view of the same paper release mechanism, FIG. 3 is a sectional view taken along the line III-III in FIG. 2, and FIG. FIG. 5 is a configuration diagram of a control unit in the release mechanism, and FIG.
FIG. 3 is a diagram showing a paper release position of the paper release cam with respect to the machine speed. In FIG. 1, the sheet ejection device of a sheet-fed rotary printing press indicated by reference numeral 2 includes a pair of left and right ejection frames 3, and two upper portions thereof supported by the left and right ejection frames 3 above. A pair of left and right sprockets 4 and 5 are mounted on each of the shafts (not shown).

A pair of left and right discharge chains 5 are not shown between the sprocket 4 and a sprocket (not shown) provided coaxially with a discharge cylinder in contact with a final printing cylinder not shown. It is stretched so as to be guided by the upper and lower chain guides. The left and right paper discharge chains 6 travel in the direction of arrow C in the drawing by the rotation of the sprocket 4 by driving from the driving side, and a paper discharge between the left and right paper discharge chains 6 in which the paper 9 is conveyed. The claw member 7 is
It is supported at regular intervals in the paper transport direction C (only one is shown in the figure). Reference numeral 8 denotes a pile on which the released paper is stacked in addition to the paper discharge claw member 7 running by the paper release mechanism 10 provided above. 11 is pile 8
A paper contact provided above the rear end of the paper ejection claw member 7.
The paper that is released from the grip and falls is the stack paper 9 of the pile 8.
Before dropping on the top, the tip is hit and aligned.

Next, the paper release mechanism 10 will be described with reference to FIGS. The paper release mechanism 10 is provided with moving means 14 for moving a paper release cam 33 described later in a paper transport direction C and a direction D opposite thereto. This moving means 1
4 is provided with a cam moving motor 15 fixed to the outside of the paper discharge frame 3.
A bevel gear 16 is axially mounted on the motor shaft 5. 17
Is a bevel gear meshing with the bevel gear 16, and the shaft 1
8 is attached to one end. The shaft 18 is rotatably supported by a bearing sleeve 19 fitted in a hole of the paper discharge frame 3, the other end faces the inside of the paper discharge frame 3, and a bevel gear 20 is mounted on the other end of the shaft 18. .

Reference numeral 21 denotes a bevel gear which meshes with the bevel gear 20, and is axially mounted on one end of a screw rod 22. 25
Is a fixing plate fixed to the paper discharge frame 3.
5, a pair of bearing plates 26 and 27 each having a shaft hole are fixed to face each other. The other end of the screw rod 22 is formed in a stepped shape and is engaged with a shaft hole of the bearing plate 27, so that the stepped portion is engaged with the bearing plate 27. Further, one end of the screw rod 22 is engaged with the shaft hole of the bearing plate 26, and the nut 28 screwed to the screw rod 22 engages with the bearing plate 26. 26,27
The movement in the left-right direction is restricted between them, and it is pivotally supported.

Reference numeral 29 denotes a guide plate fixed to a fixed plate 25 so as to extend in the direction of arrow CD.
Are fitted on a linear motion bearing 31 fixed to an L-shaped support plate 30 in side view. The support plate 30 is attached to the fixed plate 25 via the guide plate 29 and the linear motion bearing 31 by an arrow C.
It is movably supported in the -D direction. Reference numeral 32 denotes a disk-shaped movable member implanted on the support plate 30. The movable member 32 has a threaded portion to be screwed into the screw rod 22, and the screw rod 22 has
With the rotation in the opposite direction, it moves in the direction of arrow CD.

Accordingly, with the movement of the movable element 32, the support plate 30 also moves along the guide plate 29 along the arrow C-.
It is configured to move in the D direction. Reference numeral 33 denotes a paper release cam fixed to the lower portion of the support plate 30 by bolts, and has a cam surface 33a formed at the lower end. The paper discharge claw member 7 is disposed so that the claw base 35 and the claw 36 face each other.
A turning force in the closing direction is applied by which a tip of the claw 36 is pressed against the claw base 35 by a spring member (not shown). And
As the paper ejection chain 6 travels, the paper ejection claw member 7 moves in the direction of arrow C, and when the cam follower 37 comes into contact with the cam surface 33a of the paper release cam 33, the claw 36 is separated from the claw base 35 and opened. Is configured.

Next, a control section for controlling the movement of the paper release cam will be described with reference to FIG. In the figure, 40 is a print start button, 41 is a low-speed range input unit for setting the position of the paper release cam 33 in a low-speed range corresponding to the weight of paper, that is, thin paper or thick paper, 42 is the motor of the machine, 44 Is an encoder provided close to the printing cylinder for detecting the speed of the machine. Reference numeral 45 denotes a control device which sets a function for determining the position of the paper release cam 33 in the high speed range when the position of the paper release cam 33 in the low speed range is set by the low speed range input section 41. Also, when the speed of the machine is set to the switching speed
When the encoder 44 detects that the speed has been switched from the low speed range to the high speed range, a signal is sent to the control device 45, and the control device 45 switches the paper release position of the paper release cam 33 to the setting in the high speed range. It is configured as follows. The position setting of the paper release cam 33 in the high-speed range is controlled by the control device 45 based on the position a1 or b1 of the paper release cam 33 in the low-speed range and the inclination α of the straight line A2. That is, when the position of the paper release cam 33 in the low-speed range in FIG. 6 is set to a1 or b1, the control device 45 automatically sets the position of the paper release cam 33 in the high-speed range to the straight line A2 or the straight line A2. It is controlled based on a function represented by B2.

Next, the sheet discharging operation of the sheet discharging device of the sheet-fed rotary printing press thus configured will be described with reference to FIG. First, in S60, the position of the paper release cam 33 in the low speed range is set by the low speed range input section 41. In this case, the sheet to be ejected differs depending on whether the sheet is thin paper or thick paper. For example, in the case of thin paper, when input is made by the low-speed area input unit 41, in S61, the control unit 45 causes the thin paper to operate in the low-speed area. And the paper release position in the high-speed range. That is, in FIG.
The release position of the thin paper in the low-speed range is set to a1, and the release position in the high-speed range is set to a1 when the machine speed is v1, and is set to a function represented by a straight line A2 whose inclination is α. .

In step S62, the control device 45 determines that the paper release cam 33 is in the paper release position in the low speed region of the thin paper, that is, in FIG.
A signal is sent to the cam moving motor 15 so as to be positioned at the middle a1. The cam moving motor 15 rotates in the forward direction, and this rotation is transmitted to the threaded rod 22 via bevel gears 16 and 17, shaft 18 and bevel gears 20 and 21, and
Since 2 moves in the direction of arrow D, the support plate 30 also moves in the direction of arrow D, and the paper release cam 33 moves away from the paper contact 11 in the direction of arrow D, ie, a1.

In step S63, when the print start button 40 is operated, the motor 42 of this machine rotates to start printing, and the paper printed by the printing device (not shown) is discharged from the paper discharge chain 6 from the gripper device of the printing cylinder. The claw 36 of the paper claw member 7 is replaced with a claw base 35, and the paper claw member 7 is conveyed above the pile 8 as the paper discharge chain 6 travels. The cam follower 37 of the paper discharge claw member 7 contacts the cam surface 33a of the paper release cam 33,
Since the pawl 36 rotates in the opening direction and the paper is released from the grip, the paper is stacked on the pile 8 with the leading ends thereof hitting against the paper pad 11 while falling.

In S64, the speed of the apparatus is changed to the switching speed v1.
Is exceeded, this is detected by the encoder 44,
The controller 45 sets the position of the paper release cam 33 to a paper release position in a high-speed range, that is, a function represented by a straight line A2. In S65, the speed of the machine detected by the encoder 44 is input to the control device 45,
The control device 45 sends a control signal to the cam moving motor 15 so that the position of the paper release cam 33 is changed in accordance with the speed of the apparatus based on the function A2. In S66, the printing ends.

Next, the case where the paper is thick paper will be described. First,
In S60, the position of the paper release cam 33 in the low-speed region of the thick paper is set by the low-speed region input section 41. In S61, the control device 45 sets the paper release position in the low speed range of the thick paper and sets the paper release position in the high speed range. That is, in FIG. 6, the release position of the thick paper in the low-speed range is set to b1, and the release position in the high-speed range is represented by b1 when the machine speed is v1 and by a straight line B2 having an inclination of α. Function. In S62, the control device 45
The cam-moving motor 15 is moved so that the paper release cam 33 is positioned at b1 in FIG.
, The paper release cam 33 moves away from the paper contact 11 by a distance b1.

In step S63, when the print start button 40 is operated, the printing machine motor 42 rotates to start printing, and the paper held by the pawl 36 of the paper discharge pawl member 7 of the paper discharge chain 6 and the pawl base 35 is removed. The paper is conveyed above the pile 8 as the paper discharge chain 6 travels. Cam follower 3 of paper discharge claw member 7
7 comes into contact with the cam surface 33a of the paper release cam 33, and the pawl 36 rotates in the opening direction to release the paper from the grip. Be loaded.

In S64, the speed of the apparatus is changed to the switching speed v1.
Is exceeded, this is detected by the encoder 44,
The controller 45 sets the position of the paper release cam 33 to a paper release position in a high-speed range, that is, a function represented by a straight line B2. In S65, the speed of the machine detected by the encoder 44 is input to the control device 45,
The control device 45 sends a control signal to the cam moving motor 15 so that the position of the paper release cam 33 is changed in accordance with the speed of the apparatus based on the function B2. In S66, the printing ends. As described above, when the paper release position in the low-speed range is set, the control device 45 automatically sets the paper release position in the high-speed range. Accidents caused by forgetting the settings can be prevented.

FIG. 7 is a diagram showing a configuration of a control unit according to a second embodiment of the present invention. In the second embodiment, two piles are used, that is, a first pile closer to the printing apparatus and a second pile farther from the printing apparatus (both not shown).
Are arranged side by side, and each pile is provided with a paper release cam (not shown) as in the first embodiment. 47 is a first pile cam moving motor for moving the first pile paper release cam, and 48 is a second pile cam moving motor for moving the second pile paper release cam. In addition, a switching means (for example, such as a paper release cam) that enables a paper release cam, which has been widely known, to be able to advance and retreat to the traveling locus position of the paper discharge claw member is provided on the paper release cam of the first pile closer to the printing apparatus.
A pile switching air cylinder 50 (disclosed in Japanese Utility Model Laid-Open No. 6-42174) is provided.

Next, the sheet discharging operation of the sheet discharging device of the sheet-fed rotary printing press according to the second embodiment having such a configuration will be described with reference to FIG. First, the case of thin paper will be described.
At 70, the position of the paper release cam in the low speed region of the thin paper is set by the low speed region input section 41. In S71, the control device 50 sets the release position of the thin paper in the low speed region in the first pile and the second pile, and sets the release position of the thick paper in the high speed region in the first pile and the second pile. . That is, in FIG. 6, the release position of the thin paper in the low-speed range is set to a1, and the release position in the high-speed range is
A1 when the machine speed is v1 and a straight line A2 having an inclination of α
Is set to the function represented by.

In S72, the control device 50 controls the first pile cam moving motor so that the paper release cams of the first pile and the second pile are positioned at a1 in FIG. 6, which is the release position of the thin paper in the low speed range. Since the control signal is sent to the second pile cam moving motor 47 and the second pile cam moving motor 48, the paper release cams of the first pile and the second pile are both separated from the respective paper contacts (not shown) by the distance a1.

In S73, when the print start button 40 is operated, the motor 42 of the machine rotates to start printing, and the paper held by the pawl 36 of the paper discharge pawl member 7 of the paper discharge chain 6 and the pawl base 35 is Is transported above the first pile as the paper discharge chain 6 travels. The cam follower 37 of the paper discharge claw member 7 contacts the cam surface 33a of the paper release cam 33, and the claw 36
Is rotated in the opening direction and the paper is released from the grip, so that the paper is dropped and the leading ends thereof are brought into contact with the paper abutment and stacked on the first pile.

When a predetermined amount of paper is stacked on the first pile in S74, pile switching is performed, and in S75,
The control device 50 operates the pile switching air cylinder 49 to cause the paper release cam of the first pile to retreat from the traveling locus position of the paper discharge claw member, thereby switching the paper to fall on the second pile. In S76, when the speed of the machine exceeds the switching speed v1, this is detected by the encoder 44, and the control device 50 transmits the first pile and the second pile.
The position of the pile paper release cam is set to the paper release position in the high-speed range, that is, the function A2.

In S77, the speed of the machine detected by the encoder 44 is input to the control device 50, and the control device 50 determines the position of the paper release cams of the first pile and the second pile based on the function A2. The first pile cam moving motor 47 is changed so as to be changed in accordance with the speed.
And a control signal to the second pile cam moving motor 48.
When a predetermined amount of paper is stacked on the second pile in S78, pile switching is performed, and in S79, the control device 50
Then, the pile switching air cylinder 49 is operated, and the first
By causing the paper release cam of the pile to advance to the traveling locus position of the paper discharge claw member, the paper is switched so as to drop on the first pile. In S80, the printing ends.

Next, the case of thick paper will be described. In S70, the position of the paper release cam in the low speed range of thick paper is set by the low speed range input section 41. In S71, the control device 50 sets the release position of the thick paper in the low speed range in the first pile and the second pile, and sets the first pile and the second pile in the second pile.
Set the paper release position in the pile at high speeds for thick paper. That is, in FIG. 6, the release position of the thick paper in the low-speed region is set to b1, and the release position in the high-speed region is the position b1 when the machine speed is v1 and the straight line B2 having the inclination of α.
Is set to the function represented by.

In S72, the control device 50 controls the first pile cam moving motor so that the paper release cams of the first pile and the second pile are positioned at b1 in FIG. 6, which is the paper release position in the low speed region of the thick paper. Since a signal is sent to the second pile cam moving motor 47 and the second pile cam moving motor 48, the paper release cams of the first pile and the second pile are both separated from the respective paper rests (not shown) by a distance b2. After this, S
The operations in 73 to S80 are the same as those in the case of the thin paper described above, and the description is omitted. In this manner, when the paper release position of one of the two piles in the low-speed range of the paper release cam is set, the paper release position of the other paper release cam in the low-speed range is automatically set, and The paper release position in the high speed region of both piles is set. Therefore, the operation for setting is completed only once and the operation is not complicated, and the trouble due to forgetting the setting of the paper release position of the paper release cam in the low speed range and the high speed range in both piles is eliminated, so that the smooth operation is achieved. The paper is discharged.

In this embodiment, when the change amount in the low-speed range is moved from a1 to b1, that is, by D, the change amount in the high-speed range is also moved by D. The moving amount in the high-speed region does not necessarily have to be the same amount, and the change amount in the high-speed region may be D ± β, and the correction amount β may be appropriately taken into account.

[0032]

As described above, according to the present invention, the paper release position in the high speed range is automatically set,
Regardless of the speed of this machine and thin paper or thick paper, falling of paper from the pile and irregularity of paper are prevented.

Further, according to the third invention, the operation is not complicated, and the falling of the paper from the pile and the irregularity of the paper are prevented irrespective of the speed of the apparatus and the thin or thick paper.

[Brief description of the drawings]

FIG. 1 is a side view showing a sheet discharging device of a sheet-fed rotary printing press according to the present invention.

FIG. 2 is a side view of a paper release mechanism in a sheet discharging device of a sheet-fed rotary printing press according to the present invention.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a configuration diagram of a control unit in a paper release mechanism of the sheet discharging device of the sheet-fed rotary printing press according to the present invention.

FIG. 5 is a flowchart illustrating a moving operation of a paper release cam in the sheet discharging device of the sheet-fed rotary printing press according to the present invention.

FIG. 6 is a diagram showing a paper release position of a paper release cam with respect to the speed of the main body in the paper discharge device of the sheet-fed rotary printing press according to the present invention.

FIG. 7 is a configuration diagram of a control unit in a paper release mechanism according to a second embodiment of the paper discharge device of the sheet-fed rotary printing press according to the present invention.

FIG. 8 is a flowchart for explaining a movement operation of a paper release cam according to a second embodiment in a sheet discharge device of a sheet-fed rotary printing press according to the present invention.

FIG. 9 is a diagram showing a paper release position of a paper release cam with respect to a speed of the apparatus in thin paper in a paper discharge device of a conventional sheet-fed rotary printing press.

FIG. 10 is a diagram showing a paper release position of a paper release cam with respect to a speed of the main body of the paper discharge device of a conventional sheet-fed rotary printing press with respect to thick paper.

[Explanation of symbols]

2 ... paper discharge device, 6 ... paper discharge chain, 7 ... paper discharge claw member, 8
... Pile, 11 ... Paper contact, 10 ... Paper release mechanism, 14 ... Moving means, 15 ... Cam moving motor, 33 ... Paper release cam,
41: low speed range input unit, 44: encoder, 45, 50 ...
Control device, 47 ... First pile cam moving motor, 48 ...
Second pile cam moving motor.

Claims (3)

[Claims] 1. A paper holding device provided in a transport chain for holding paper, a paper release member for releasing paper holding by the paper holding device, and a paper discharge loading device for loading paper released from the paper holding device. And a control device for setting the paper release position in the low speed range of the paper release member and the paper release position in the high speed range of the paper release member in accordance with the printing speed. The above-mentioned control device is characterized in that, in accordance with the setting change of the paper release position of the paper release member in the low speed range, the paper release position of the paper release member in the high speed range changes the setting in the same direction. Paper ejection device. 2. A sheet discharging device for a sheet-fed rotary printing press according to claim 1, wherein a low-speed region input section for setting a position of a sheet releasing member in a low-speed region, an encoder for detecting a speed of the machine, and a paper. A sheet discharging device for a sheet-fed rotary printing press, comprising: a cam moving motor for moving a release member. 3. A sheet discharging device for a sheet-fed rotary printing press according to claim 1, wherein a plurality of sheet discharging and stacking devices are provided, and a plurality of sheet releasing members are provided in correspondence with these sheet discharging and stacking devices. A sheet discharging device for a sheet-fed rotary printing press, characterized in that there is provided interlocking means for interlocking the setting of a sheet releasing position in a low speed range of another sheet releasing member by adjusting one sheet releasing member.