JP4774359B2 - Swing device for sheet-fed printing press - Google Patents

Description

  The present invention relates to a swing device for a sheet-fed printing press, and more particularly to a swing device for a sheet-fed printing press that supports illegal sheet feeding in a sheet feeding unit.

One of the printing methods that has become mainstream in the field of mass printing is an offset printing method. This offset printing system is a system in which ink applied to a plate is once transferred to a rubber sheet and transferred to paper or the like for printing.
Since printing is not performed directly on the paper from the plate in this way, the plate is prevented from being damaged due to contact with the paper, and high-speed printing can be realized.
One of the offset printing methods is a sheet-fed printing method. This sheet-fed printing method is a method in which sheets that have been cut in advance to a predetermined size are conveyed one by one from the paper feeding unit to the printing unit and printed, and the size and thickness of the printed sheet are free. There are many advantages, such as being able to print on films other than paper, etc., and being able to respond flexibly to other advanced printing technologies.

Here, a sheet transport mechanism of a sheet feeding unit in a sheet-fed printing machine using this sheet-fed printing method will be described.
The sheet feeding unit of the sheet-fed printing machine is generally provided with a swing lever for passing the sheet fed on the feeder board to the sheet feeding cylinder.
One end of the swing lever is fixed to the swing shaft, and the sheet is transported by swinging between the feeder board and the paper feed cylinder about the swing shaft.
In addition, the other end of the swing lever is a claw seat on which the sheet fed on the feeder board is placed, and the sheet is sandwiched between the claw seat and the sheet to hold the sheet. Gripper claws.
With this gripper claw open to the nail seat, the fed sheet is received between the gripper claw and the nail seat, and the gripper claw is closed to the nail seat and the sheet is gripped. Later, it swings around the swing axis and carries the gripped sheet to the paper feed cylinder. Then, the gripper claw is opened and the gripped sheet is released and moved to the paper feed cylinder. The swing lever swings around the swing axis and removes the sheet fed on the feeder board. Return to the grippable position.
By repeating this series of operations one sheet at a time, a large number of sheets are conveyed one after another.

  As described above, in the sheet-fed printing method, the sheet feeding unit conveys the sheets one by one, but rarely a plurality of sheets are conveyed simultaneously on the feeder board, and the sheets are conveyed obliquely. Incorrect paper feeding may occur. When illegal feeding occurs in this way, if the above-mentioned gripper claws and claw seats grip a plurality of sheets and convey them to the feeding cylinder, a paper jam occurs and the sheet is conveyed. Will cause printing troubles such as stoppage or normal printing.

As one of the techniques for preventing the occurrence of printing trouble due to such illegal paper feeding, a swing gripper device for a sheet-fed printing machine disclosed in Patent Document 1 has been proposed.
This swing gripper device is provided with two cams for opening and closing the gripper claws, and is configured such that these cams can be switched by operating a cam arm actuator.
At the time of normal feeding, a cam capable of closing the gripper claws and gripping the sheet is selected. On the other hand, when illegal feeding occurs, even if the gripper claw is closest to the nail seat, a cam that does not close completely and does not grip the sheet is selected, and multiple sheets that have been conveyed on the feeder board together It is possible to prevent the sheet from being fed to the printing unit.
JP 2003-267586 A

However, the swing gripper device disclosed in Patent Document 1 generates improper paper feeding during high-speed printing. When the cam is switched by a cam actuator, a large vibration (shock) is generated due to the switching, and the cam There is a problem that a load is applied to the peripheral members and the members are damaged.
The swing gripper device of Patent Document 1 is used for a sheet-fed printing machine for high-speed printing because there is a possibility of damaging the printing device each time conveyance of illegal paper is stopped during high-speed printing. In some cases, there is a risk that maintenance and repair costs more than conventional ones may be required.

  The present invention has been made in view of the above problems, and even when illegal sheet feeding occurs in a sheet-fed printing press for high-speed printing, without adversely affecting the site in the printing press, An object of the present invention is to provide a swing device for a sheet-fed printing press capable of smoothly stopping the paper feeding operation.

  In order to achieve such an object, the present invention provides a swing device for a sheet-fed printing press that grips and transports a sheet of paper that is transported on a feeder board and is in contact with a front pad, using the gripper claw. The claw opening / closing cam follower moves along with the movement of the claw opening / closing claw.When illegal paper feeding occurs, the movement path of the claw opening / closing cam is changed, and the sheet on the feeder board is moved. It is characterized by not being gripped.

The present invention also relates to a swing device for a sheet-fed printing machine that grips a sheet conveyed on a feeder board and abuts against a front pad and conveys the sheet to a sheet feeding cylinder, and includes a left and right frame of the sheet-fed printing machine. A swing lever shaft that is swingably provided between the swing lever shaft, an eccentric bearing that is pivotally provided on the swing lever shaft and has an axis center that is eccentric with respect to the rotation center of the swing lever shaft, and a swing lever shaft A fixed swing lever, a claw opening / closing cam fixed to an eccentric bearing , a cam groove provided on a side surface of the claw opening / closing cam, and a swing lever fixedly engaged with the cam groove by swinging of the swing lever. A claw opening / closing cam follower, and a gripper claw that moves according to the movement of the claw opening / closing cam follower and opens / closes the claw according to the position on the cam groove of the claw opening / closing cam follower. By the reciprocating motion of the cam-groove of the claw opening and closing cam followers with the swing of the Gureba, gripper claws are being driven controlled to convey the grasped feeding cylinder abuts the sheet count on before, the eccentric bearings, sheets When the paper sheet is normally fed, the swing lever rotates about the first shaft center that is eccentric from the center of the swing axis of the swing lever. The claw opening / closing cam fixed to the eccentric bearing also moves differently from that during normal paper feeding. The position on the cam groove of the claw opening / closing cam follower relative to the swing position of the swing lever is also different from that during normal feeding, and the gripper claw approaches the sheet that is in contact with the front cover. When holding the toes open, Characterized in that it is configured not to transport gripping the paper.

Further, according to the present invention, the eccentric bearing moves the cam groove to a position where the gripper claw remains closed when the gripper claw is moved to a position where the sheet is released at the time of illegal feeding. Rotating to

Further, according to the present invention, there is further provided a paper presser that operates simultaneously with the rotation of the eccentric bearing and holds the sheet on the feeder board.

  The present invention relates to a swing device for a sheet-fed printing press that grips and transports a sheet of paper that is transported on a feeder board and is in contact with a front paddle with a gripper claw. The claw opening / closing cam is configured to open and close, and when illegal feeding occurs, the movement trajectory of the claw opening / closing cam is changed so that the illegal paper on the feeder board is not gripped. Therefore, it is possible to prevent illegal paper from being conveyed to the printing unit, and it is possible to prevent unnecessary printing troubles.

<First Embodiment>
(Configuration of the first embodiment)
The swing device according to the present embodiment is installed in a sheet-fed printing press, and normally grips a sheet conveyed on a feeder board with a gripper claw and conveys the sheet to a sheet feeding cylinder. Thereafter, the sheet transported to the paper feed cylinder is transported from the paper feed cylinder to the printing unit and printed.
On the other hand, when an illegal paper feed occurs such that two sheets of paper are transported simultaneously or the paper is transported obliquely, the swing device according to the present embodiment performs the illegally fed sheet (hereinafter referred to as illegal By preventing the paper) from being conveyed to the printing unit or the like, troubles in the printing press can be prevented.

1 and 2 are a side view and a front view showing the configuration of the swing device of the sheet-fed printing press according to the first embodiment of the present invention, and the sheet 100 is received from the feeder board 110 in a normal state. It is a figure which shows a state.
Hereinafter, the configuration of the swing device will be described with reference to FIG.
Hereinafter, in the present specification, an upward direction perpendicular to the ground is simply referred to as “upward”, and a downward vertical direction is simply referred to as “downward”.

As shown in the drawing, in the swing device according to the present embodiment, a swing lever shaft 40 is swingably provided between the left and right frames in the sheet-fed printing press, and the swing lever 30 is fixed to the swing lever shaft 40. Yes. An eccentric bearing 20 that is eccentric with respect to the rotation center of the shaft 40 is rotatably attached to the swing lever shaft 40. The eccentric bearing 20 has a double structure of an inner ring and an outer ring, and the center of the inner periphery of the outer ring is eccentric with respect to the center of the swing lever shaft 40.
A gripper shaft 50 that is rotatably supported on the free end side of the swing lever 30, a gripper claw 60 that rotates around the gripper shaft 50 and grips the sheet 100, and the swing lever 30 is free. A claw seat 70 is provided on the end side for gripping the sheet 100 by being sandwiched between the gripper claws 60. A claw opening / closing cam 201 in which a cam groove 21 is formed is fixed to the eccentric bearing 20.
A claw opening / closing cam follower 80 that drives the gripper claw 60 that opens / closes with respect to the claw seat 70 is slidably fitted along the cam groove 21.
Further, an eccentric bearing drive mechanism 10 is provided on a frame in the printing press, and an eccentric bearing 20 is rotatably supported at the tip of the eccentric bearing drive mechanism 10.

The swing lever shaft 40 is rotatably provided at both ends of the shaft on the frame in the sheet-fed printing press. When the swing lever shaft 40 rotates, the swing lever 30 swings around the rotation shaft. To do. Here, the center of rotation of the eccentric bearing 20 is A, and the center of rotation of the swing lever shaft 40 is B.

As shown in the figure, the eccentric bearing 20 is provided with a cam groove 21 for guiding the claw opening / closing cam follower 80.
The claw opening / closing cam follower 80 reciprocates on the cam groove 21 as the swing lever 30 swings. When the gripper claw 60 grips the sheet 100 from the feeder board 110, the claw opening / closing cam follower 80 is in the position shown in the figure. Thereafter, when the sheet 100 held by the gripper claw 60 is passed to the paper feed cylinder 120, the claw opening / closing cam follower 80 moves to the right (clockwise) as the swing lever 30 swings. To go. The claw opening / closing cam follower 80 moves to the left side (counterclockwise) as the swing lever 30 swings after the gripper claw 60 passes the sheet 100 to the paper feed cylinder 120, Return to the receiving position of the sheet 100.

  The gripper claw 60 is configured to open and close the claw as the gripper shaft 50 rotates. The gripper shaft 50 extends from the above-described claw opening / closing cam follower 80, and the gripper claw 60 is opened / closed according to the position of the claw opening / closing cam follower 80.

Further, independently of the swinging of the aforementioned swing lever 30, the eccentric bearing 20 is rotated by the swing of the eccentric bearing drive mechanism 10.
Further, the configuration of the eccentric bearing drive mechanism 10 will be described in detail. The eccentric bearing drive mechanism 10 includes an arm shaft 11 that is rotatably fixed to a frame in the sheet-fed printing press, and one end that is connected to the arm shaft. An arm member 12a that is rotatably supported and is configured such that the other end thereof is extendable and retractable by the cylinder 12, an arm member 13 having one end connected to the other end of the arm member 12a, and the arm members 12a and 13 as axes. An arm shaft 14 that is rotatably connected around the arm, an arm swing shaft 15 that is a central axis of swinging by an eccentric bearing drive mechanism 10 that is rotatably fixed to an intermediate portion of the arm shaft 13, and one end Includes an arm member 16 connected to the other end of the arm shaft 13, an arm shaft 17 connected to the arm members 13 and 16 so as to be rotatable about the axis, the other end of the arm member 16, and the eccentric bearing described above. 20 It constructed a wheel and a bearing communicating 設軸 18 continuously arranged rotatably.

In the eccentric bearing drive mechanism 10, the arm shaft 11 and the arm swing shaft 15 are fixed to the frame of the sheet-fed printing machine so as to be freely rotatable. Along with this, the rod 12a of the air cylinder 12 expands and contracts, so that the arm members 13 and 16 swing around the arm shafts 14 and 17, and the eccentric bearing 20 rotates eccentrically with the swing lever shaft 40. It is possible to move.
In the present embodiment, when illegal sheet feeding occurs, the same direction as the movement direction of the claw opening / closing cam follower 80 when conveying the sheet from the feeder board 110 to the sheet feeding cylinder 120, that is, the rotation direction of the swing lever shaft 40 The eccentric bearing 20 is configured to rotate in the same direction.
However, the rotation center of the eccentric bearing 20 and the rotation center of the swing lever shaft 40 are arranged so as to be eccentric from each other.

(Operation of the first embodiment)
Next, the conveyance operation of the sheet 100 by the swing device according to the present embodiment will be described separately for (1) normal operation and (2) when illegal sheet feeding occurs.

(1) Transporting operation of the sheet 100 in the normal state First, an operation by the swing device when transporting the sheet 100 from the feeder board 110 to the sheet feeding cylinder 120 in the normal state will be described.

As shown in FIG. 1, when the sheet 100 is conveyed onto the feeder board 110, the leading edge of the sheet 100 comes into contact with the front pad 111, and the conveyance is temporarily stopped.
At this time, the gripper claw 60 and the claw seat 70 swing and approach the sheet 100 stopped by the front pad 111, and the front of the sheet 100 is interposed between the gripper claw 60 and the claw seat 70. An edge is inserted.

FIG. 3 is a side view showing the configuration of the swing device of the sheet-fed printing press according to the first embodiment of the present invention, and shows a state in which the sheet 100 received from the feeder board 110 is held in a normal state. It is.
As described above, after inserting the sheet 100 whose conveyance is stopped by the front pad 111 between the gripper claw 60 and the claw seat 70, the swing lever 30 is moved to the swing lever shaft 40 as shown in the figure. The claw opening / closing cam follower 80 fixed on the free end side of the swing lever 30 slides along the cam groove 21 as it rotates clockwise around the center.
The gripper shaft 50 connected to the claw opening / closing cam follower 80 also moves together with the claw opening / closing cam follower 80, so that the gripper claw 60 moves in the direction of the claw seat 70 and is inserted between them. Pick up the leaf paper 100.

FIG. 4 is a side view showing the configuration of the swing device of the sheet-fed printing press according to the first embodiment of the present invention, and shows a state in which the prepared sheet 100 is transferred to the sheet feeding cylinder 120 in a normal state. FIG.
As described above, after the swing lever 30 swings and grips the gripper pawl 60 sheets 100, when the swing lever 30 is further rotated clockwise about the swing lever shaft 40 as shown in the drawing, the gripper The claw 60 and the claw seat 70 convey the sheet 100 to the sheet feeding cylinder 120 while holding it.
Further, when the swing lever 30 is rotated clockwise about the swing lever shaft 40, the gripper claw 60 is opened to release the sheet 100, and the sheet 100 is transferred to the sheet feeding cylinder 120.
As described above, in a normal state, the swing device grips the sheet 100 conveyed on the feeder board 110 and conveys it to the sheet feeding cylinder 120 as it is.
Thereafter, the sheet feeding cylinder 120 conveys the delivered sheet 100 to a printing unit (not shown), and printing is performed. In addition, the claw opening / closing cam follower 80 is moved again to the holding position of the sheet 100 by the swinging of the swing lever 30, and the sheet feeding operation is repeated.

(2) Transporting operation of the sheet 100 when illegal paper feeding occurs Next, the operation of the swing device when illegal paper feeding occurs will be described. When a plurality of sheets 100 are transported simultaneously on the feeder board 110 or are transported at an angle and an illegal sheet feeding occurs, an unauthorized sheet feeding detection sensor (not shown) provided in the sheet printing machine is provided. Then, the occurrence of the illegal sheet feeding is detected and notified to the swing device.
When the swing device receives a notification that the illegal sheet feeding has occurred, the swing device swings the eccentric bearing drive mechanism 10 so as to rotate the arm member 13 counterclockwise about the arm swing shaft 15.
As the eccentric bearing drive mechanism 10 swings, the eccentric bearing 20 rotates clockwise about the rotating shaft center C eccentric from the center of the swing lever shaft 40 and moves downward. As a result, the position of the cam groove 21 that controls the opening / closing timing of the gripper claw 60 is also moved relatively, and the claw opening / closing cam follower 80 delays the cam groove 21 by a predetermined time compared to the normal time when the illegal feeding occurs. Slide at the timing. As a result, the opening and closing of the gripper claw 60 is performed at a timing delayed by a predetermined time.
Further, since the center of the rotational axis of the eccentric bearing 20 is eccentrically arranged in the cam groove 21 forming direction from the center of the swing lever shaft 40, the center of the swing lever shaft 40 is rotated by the rotation of the eccentric bearing 20. The relative position of the cam groove 21 also moves. As a result, the gripper claw 60 remains open at the timing when the gripper claw 60 is closed when it is normal, that is, when the illegal paper 200 is received.
By performing these operations, the swing device does not pick up the illegal paper 200 even if the illegal paper 200 is fed, so that the illegal paper 200 can be prevented from being conveyed to the paper feed cylinder 120. It has become.

FIG. 5 is a side view illustrating the configuration of the swing device of the sheet-fed printing press according to the first embodiment of the present invention, and is a diagram illustrating a state when an illegal sheet feeding occurs.
As shown in the figure, when the fraudulent paper 200 is conveyed onto the feeder board 110 and the conveyance is stopped by the front pad 111, the gap between the gripper claw 60 and the claw seat 70 is in an open state. The leading edge of the illegal paper 200 is inserted into

FIG. 6 is a side view showing the configuration of the swing device of the sheet-fed printing press according to the first embodiment of the present invention, and the illegal paper 200 has reached the front pad 111 from the feeder board 110 when an illegal paper feed occurs. It is a figure which shows a state.
As described above, when the front edge of the illegal paper 200 whose conveyance is stopped by the front pad 111 is inserted between the gripper claw 60 and the claw seat 70, the swing lever 30 is moved as shown in the figure. The claw opening / closing cam follower 80 fixed to the free end side of the swing lever 30 slides along the cam groove 21. At this time, as described above, the claw opening / closing cam follower 80 slides on the cam groove 21 at a timing delayed by a predetermined time compared with the normal time, so that the gripper claw 60 and the claw seat 70 are not held without gripping the illegal paper 200. Starts swinging clockwise.

FIG. 7 is a side view illustrating the configuration of the swing device of the sheet-fed printing press according to the first embodiment of the present invention. When illegal paper feeding occurs, the gripper claw 60 and the claw seat 70 are connected to the paper feeding cylinder 120. It is a figure which shows the state which moved to the adjacent position.
As described above, since the gripper claw 60 and the claw seat 70 swing clockwise without the gripper claw 60 being closed, that is, without gripping the illegal paper 200, as shown in FIG. Even if the paper moves to an adjacent position, the illegal paper 200 is not transferred to the paper feed cylinder 120. Therefore, the illegal paper 200 is not conveyed to the printing unit (not shown) via the paper feed cylinder 120, and it is possible to prevent the sheet-fed printing press from being damaged due to paper clogging or the like.

Further, as described above, when the gripper claw 60 and the claw seat 70 are moved to a position adjacent to the sheet feeding cylinder 120 in the normal state, the gripper claw 60 is opened and the sheet 100 is opened.
On the other hand, when the illegal sheet feeding occurs, the claw opening / closing cam follower 80 slides in the cam groove 21 at a timing delayed by a predetermined time compared with the normal time, so that the gripper claw 60 and the claw seat 70 are connected to the sheet feeding cylinder 120. The gripper claw 60 remains closed even if it moves to a position adjacent to the.

(3) Rotating Operation of Eccentric Bearing 20 When Unauthorized Paper Feeding FIG. 8 is a side view showing the rotation of the claw opening / closing cam 201 and the eccentric bearing 20 when unauthorized paper feeding occurs in the first embodiment of the present invention. It is.
Hereinafter, the opening / closing operation of the gripper claw 60 when the above-described illegal sheet feeding occurs will be described in more detail with reference to FIG.
In this figure, the position of the normal claw opening / closing cam follower 80 when the gripper claw 60 receives the sheet 100 or the illegal paper 200 from the feeder board 110 is indicated by a solid line as X, and the claw opening / closing cam follower 80 when the illegal paper feeding occurs. Is indicated by a broken line as X ′. The position of the normal claw opening / closing cam follower 80 when the gripper claw 60 passes to the paper feeding cylinder 120 is indicated by a solid line as Y, and the position of the claw opening / closing cam follower 80 at the time of illegal paper feeding is indicated by a broken line as Y ′. Yes. Further, the position of the cam groove 21 at the normal time is indicated by a solid line, and the cam groove 21 at the time of occurrence of illegal feeding is indicated by a broken line.
Hereinafter, the rotational operation of the eccentric bearing 20 at the time of occurrence of illegal sheet feeding will be described with reference to the drawings.

As shown in the figure, the center A of the rotation shaft of the eccentric bearing 20 and the center B of the swing lever shaft 40 of the swing lever 30 for swinging the pawl opening / closing cam follower 80 are eccentric.
Since the center A, B are eccentric to each other, by rotation of the eccentric bearing 20, the position of the cam groove 21 provided on the eccentric bearing 20 relative to the locus of swinging of the swing lever 30, i.e. the claw opening and closing cam followers The movement trajectory 80 also changes from the solid line X → Y in the figure to the broken line X ′ → Y ′.

  As shown in the figure, when the illegal sheet feeding occurs, the position of the cam groove 21 when receiving the paper from the feeder board 110 moves from the outer peripheral side of the swing lever shaft 40 to the central side as compared with the normal time. As a result, the position of the claw opening / closing cam follower 80 also moves in the same direction, so that the gripper claw 60 is closed when it is normal, but remains open when illegal feeding occurs.

  On the other hand, when the paper is passed to the paper feed cylinder 120 after the illegal paper feed occurs, the cam groove 21 is, as shown in the figure, on the opposite side of the swing range from the center side of the swing lever shaft 40 as compared with the normal time. Move to. As a result, the position of the pawl opening / closing cam follower 80 also moves in the same direction, so that the gripper pawl 60 is opened when it is normal, but remains closed when an illegal paper feed occurs.

In addition, since the rotation direction from the paper gripping position to the paper transfer position and the rotation direction of the eccentric bearing 20 at the time of illegal paper feeding are the same clockwise, the claw opening and closing is performed at the time of illegal paper feeding. The cam follower 80 moves in a clockwise direction with a delay compared to the normal time. For this reason, the gripper claw 60 opens and closes at a timing delayed from the normal time when an illegal sheet feeding occurs. In other words, when the gripper claw 60 moves to the position of the paper feed cylinder 120, the gripper claw 60 is opened in the normal state, and the flawed sheet 100 is released.

(Summary of the first embodiment)
As described above, the swing device according to the present embodiment has both time points when gripping the illegal paper 200 conveyed on the feeder board 110 and passing the illegal paper 200 to the paper feed cylinder 120 when illegal paper feeding occurs. In this case, since the operation to suppress the conveyance of the illegal paper 200 is performed, it is possible to surely prevent a printing trouble caused by the conveyance of the illegal paper 200.

In other words, when the illegal feeding occurs, the eccentric bearing 20 rotates eccentrically with the swing lever shaft 40, and accordingly, the position of the cam groove 21 when the gripper claw 60 receives the illegal paper 200 from the feeder board 110. Then, it moves to the outer peripheral side of the swing lever shaft 40. Since the claw opening / closing cam follower 80 moves along the cam groove 21 moved to the outer peripheral side, the gap between the gripper claw 60 and the claw seat 70 is widened and the gripper claw 60 remains open even when the illegal paper 200 is received. Become.
Accordingly, the swing device according to the present embodiment does not pick up the illegal paper 200 when an illegal paper feed occurs, and therefore occurs when the illegal paper 200 is conveyed to a printing unit or the like of a sheet-fed printing press. Serious printing troubles can be prevented in advance.

On the other hand, due to the rotation of the eccentric bearing 20 described above, the position of the cam groove 21 when the gripper claw 60 passes the illegal paper 200 to the paper feed cylinder 120 moves to the rotation center side of the swing lever shaft 40 (the center is Move from A to C). Since the claw opening / closing cam follower 80 moves along the cam groove 21 moved to the rotation center side, the gap between the gripper claw 60 and the claw seat 70 is narrowed.
Further, since the opening / closing timing of the gripper claw 60 is delayed due to the rotation of the eccentric bearing 20, the gripper claw 60 remains closed even when the paper is fed to the paper feed cylinder 120.

In addition, since the opening / closing control of the gripper pawl 60 at the time of such illegal feeding is performed by the rotation of the eccentric bearing 20, no shock and load are generated by the opening / closing control even at high speed printing. It is possible to reliably prevent the illegal paper 200 from being smoothly conveyed without damaging the machine.

In the present embodiment, the fact that the illegal paper 200 has been conveyed to the swing device is detected by various conventional illegal paper feed detection sensors.
For example, the various illegal paper feed detection sensors include a front contact detection sensor, a horizontal needle detection sensor, a two-sheet stop detection sensor, an overrun detection sensor, a jump detection sensor, a reverse product detection sensor, or a combination thereof. used.
Specifically, the unauthorized paper feed detection sensor measures the timing at which the leading edge of the sheet 100 conveyed on the feeder board 110 passes the measurement point, and when this timing is out of the normal range, You may comprise so that it may determine with paper having generate | occur | produced.
When the eccentric bearing 20 receives the determination of the occurrence of unauthorized paper feed by the unauthorized paper feed detection sensor, the eccentric bearing 20 rotates as described above to prevent the unauthorized paper 200 from being conveyed.

<Second Embodiment>
(Configuration of Second Embodiment)
As described above, in the swing device according to the first embodiment, when improper paper feeding occurs, the movement of the claw opening / closing cam follower 80 that opens and closes the gripper claw 60 by rotating the eccentric bearing 20 changes compared to the normal time. By doing so, it is possible to prevent the illegal paper 200 from being conveyed to the paper feed unit and thereafter.
In addition to the opening / closing mechanism of the gripper claw 60, the swing device according to the present embodiment further includes a paper presser 90 that stops the conveyance by stopping the unauthorized paper 200 against the feeder board 110, and transports the unauthorized paper 200. Can be more reliably prevented.
Hereinafter, unless otherwise specified, the configuration and operation in the present embodiment will be described assuming that they are the same as those in the first embodiment.

FIG. 9 is a plan view showing the configuration of the swing device of the sheet-fed printing press according to the second embodiment of the present invention, and is a view of the swing device as viewed from above.
As shown in the figure, on the feeder board 110, a plurality of bar-shaped paper pressers 90 are provided in a direction perpendicular to the paper feeding direction on the transport surface on the feeder board 110.
When the above-described unauthorized paper feed detection sensor detects unauthorized paper feed, the plurality of paper pressers 90 simultaneously feed the unauthorized paper 200 conveyed on the feeder board 110 from above simultaneously with the rotation of the eccentric bearing 20 described above. Press to stop the conveyance.

FIG. 10 is a side view showing the configuration of the swing device of the sheet-fed printing press in the second embodiment of the present invention.
As shown in the figure, each paper presser 90 has a bar shape, and one end of the paper presser 90 is rotatably provided around the paper presser rotation shaft 91. In addition, a hemispherical member is provided at the other end of the bar-shaped paper presser 90, and when illegal paper feeding occurs, the illegal paper 200 conveyed on the feeder board 110 by the hemispherical tip is held down. To do. Note that the shape of the paper retainer 90 shown in this figure is merely an example, and any other shape may be used as long as it can stop the conveyance by stopping the illegal paper 200. Not too long.
Further, the both ends of the paper presser rotating shaft 91 are fixed to a frame in the sheet-fed printing machine so that the paper presser rotating shaft 91 is rotated by, for example, a DC solenoid. Is generated, and the paper presser 90 is rotated around the shaft 91.

(Operation of Second Embodiment)
Next, a description will be given of an operation of pressing the illegal paper 200 by the swing device according to the present embodiment with reference to the above diagram.

As shown in FIG. 9, at the normal time, as indicated by a solid line, there is a gap between the tip of the paper retainer 90 and the surface of the feeder board 110, and the sheet 100 can reach the gripper claw 60. It can be done.
On the other hand, when an illegal paper feed occurs, as shown by the broken line, the paper presser 90 rotates about the paper presser turning shaft 91, and the paper presser 90 and the conveying surface on the feeder board 110 are almost aligned. It becomes vertical, and the tip of the paper presser 90 can stop the illegal paper 200 on the feeder board 110.

As described above, according to the present embodiment, in addition to preventing the conveyance of the illegal paper 200 by the opening / closing control of the gripper claw 60, the paper presser 90 moves the illegal paper 200 conveyed on the feeder board 110. By stopping, the illegal paper 200 can be prevented from being conveyed to the gripping position of the gripper claw 60. Further, even if the illegal paper 200 is conveyed to the gripping position of the gripper claw 60, the gripper claw 60 cannot be conveyed because it is stopped by the paper retainer 90. Therefore, it is possible to surely prevent the illegal paper 200 from being conveyed to the printing unit or the like by holding the paper presser 90.
Further, since the paper pressing operation by the paper pressing tool 90 is performed by the rotation around the pressing tool rotating shaft 91, a shock and a load are not generated even during high-speed printing. As a result, it is possible to reliably prevent the illegal paper 200 from being smoothly conveyed without damaging the printing press.

(Summary of overall embodiment)
As described above, in the swing device according to the first and second embodiments described above, the timing of movement of the claw opening / closing cam follower 80 that opens and closes the gripper claw 60 by rotating the eccentric bearing 20 when the illegal feeding occurs. Since the position of the cam groove 21 is adjusted so that the gripper claw 60 and the claw seat 70 are not closed, the gripper claw 60 is prevented from gripping the illegal paper 200.
From this, it is possible to prevent the illegal paper 200 from being conveyed to the printing unit, and it is possible to prevent unnecessary printing troubles.
Further, in the swing device according to the second embodiment, when the illegal paper feeding occurs, the paper presser rotating shaft rotates, and the paper presser 90 presses the illegal paper 200 conveyed on the feeder board 110. Therefore, the gripper claw 60 can be prevented from gripping and transporting the illegal paper 200.
In addition, the rotation of the eccentric bearing 20 and the paper presser 90 can be operated without applying vibration to the sheet-fed printing press even during high-speed printing, so that the occurrence of a malfunction in the printing press is prevented by a sudden operation. It becomes possible to do.

  The above-described embodiment is an example of a preferred embodiment of the present invention. The embodiment of the present invention is not limited to this embodiment, and various modifications may be made without departing from the scope of the present invention. Is possible.

FIG. 3 is a side view illustrating a configuration of a swing device of a sheet-fed printing press according to the first embodiment of the present invention, and is a diagram illustrating a state in which a sheet is received from a feeder board in a normal state. It is a front view which shows the structure of the swing apparatus of the sheet-fed printing press in the 1st Embodiment of this invention, Comprising: It is a figure which shows the state which has received the sheet from the feeder board at the time of normal. FIG. 3 is a side view showing the configuration of the swing device of the sheet-fed printing press in the first embodiment of the present invention, and shows a state in which the sheet received from the feeder board is held in a normal state. FIG. 3 is a side view illustrating the configuration of the swing device of the sheet-fed printing press according to the first embodiment of the present invention, and is a diagram illustrating a state in which a prepared sheet is being transferred to a sheet feeding cylinder in a normal state. It is a side view which shows the structure of the swing apparatus of the sheet-fed printing press in the 1st Embodiment of this invention, Comprising: It is a figure which shows the state at the time of illegal paper feed generation | occurrence | production. FIG. 3 is a side view illustrating the configuration of the swing device of the sheet-fed printing press according to the first embodiment of the present invention, and is a diagram illustrating a state in which unauthorized paper reaches the front cover from the feeder board when unauthorized paper feeding occurs. FIG. 3 is a side view showing the configuration of the swing device of the sheet-fed printing press according to the first embodiment of the present invention, in a state where the gripper claw and the claw seat are moved to a position adjacent to the paper feed cylinder when an illegal paper feed occurs. FIG. It is a side view which shows rotation of the nail | claw opening-and-closing cam and eccentric bearing at the time of the improper paper supply in the 1st Embodiment of this invention. It is the top view which shows the structure of the swing apparatus of the sheet-fed printing press in the 2nd Embodiment of this invention, Comprising: It is the figure which looked at this swing apparatus from upper direction. It is a side view which shows the structure of the swing apparatus of the sheet-fed printing press in the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Eccentric bearing drive mechanism 11, 14, 17 Arm shaft 13, 16 Arm member 15 Arm swing shaft 18 Bearing connecting shaft 20 Eccentric bearing 21 Cam groove 30 Swing lever 40 Swing lever shaft 50 Gripper shaft 60 Gripper claw 70 Claw seat 80 Claw Opening and closing cam follower 90 Paper presser 91 Paper presser rotating shaft 100 Sheet paper 110 Feeder board 111 Front pad 120 Paper feed cylinder 200 Illegal paper 201 Claw open / close cam A, C Center of eccentric bearing B B Center of swing lever shaft X, X ', Y, Y' Claw opening / closing cam follower position

Claims (3)

A swing device for a sheet-fed printing machine that grips a sheet conveyed on a feeder board and abuts against a front pad and conveys the sheet to a sheet feeding cylinder,
A swing lever shaft swingably provided between the left and right frames of the sheet-fed printing press;
An eccentric bearing which is provided rotatably on the swing lever shaft and has an axis center which is eccentric with respect to the rotation center of the swing lever shaft;
A swing lever fixed to the swing lever shaft;
A claw opening and closing cam fixed to the eccentric bearing ;
A cam groove provided on a side surface of the claw opening and closing cam;
A claw opening and closing cam follower fixed to the swing lever and engaged and moved by the cam groove by swinging the swing lever;
A gripper claw that moves according to the movement of the claw opening / closing cam follower and opens / closes the claw according to a position on the cam groove of the claw opening / closing cam follower,
Due to the reciprocating motion of the claw opening / closing cam follower on the cam groove accompanying the swing of the swing lever due to the rotation of the swing lever shaft, the gripper claw grips the sheet abutting on the front pad and moves it to the paper feed cylinder. Drive controlled to carry,
The eccentric bearing rotates around the first shaft center that is eccentric from the center of the swing axis of the swing lever when the sheet is normally fed, and when the sheet is illegally fed. , Rotating about a second axis center different from the first axis center eccentric from the center of the swing axis of the swing lever,
Along with this, the claw opening / closing cam fixed to the eccentric bearing also rotates along a trajectory of movement different from that during normal feeding, and on the cam groove of the claw opening / closing cam follower with respect to the rotation position of the swing lever. The position will also be different from the normal feed,
The gripper claw is configured to hold the claw tip in an open state when the sheet gripper comes into contact with the front contact and to grip and not convey the sheet. Swing device for sheet-fed printing press. The eccentric bearing rotates so as to move the cam groove to a position where the gripper claw remains closed when the gripper claw moves to a position where the sheet is released when illegal paper feeding occurs. The swing device for a sheet-fed printing press according to claim 1. The swing device for a sheet-fed printing press according to claim 1 or 2, further comprising a paper presser that operates simultaneously with the rotation of the eccentric bearing and holds the sheet on the feeder board.

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