JP2015168214A - Swing mechanism for off-set printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a swing mechanism for an off-set printer which can improve the accuracy of opening/closing operation of a swing claw, and also improve the swing reliability and stability of the entire mechanism.SOLUTION: A swing mechanism of an off-set printer includes a transfer cylinder, a swing, a claw opening/closing mechanism, and a swing lever mechanism. The claw opening/closing mechanism includes: a driving gear and a claw opening/closing cam fixed and attached to an R-side shaft end of the transfer cylinder; a set of drive levers fixed and attached to a lever fitting shaft; a cam with a lever attached to a cam fitting shaft; an intermediate lever fixed and attached to the lever fitting shaft; a connection rod 11 in which both ends are connected to one shaft end of the intermediate lever and the rear part of the cam with the lever; an arc groove created to sandwich a claw opening/closing roller at the back surface of the tip part of the cam 12 with the lever. The swing lever mechanism includes a drive gear to be engaged with the driving gear, and a set of drive levers 4, 5 fixed and attached to an R-side shaft end of a swing base shaft 24.

Description

  The present invention relates to a swing mechanism for an offset printing machine, and more specifically to a swing mechanism for an offset printing machine that realizes accurate paper handling by opening and closing a swing claw.

  The swing mechanism of the offset printing machine is divided into three types: direct paper receiving, indirect paper receiving, and over paper feeding, depending on the paper receiving path method.

  The direct paper receiving is a method in which the paper is directly picked up from the impression nail after the paper is positioned by the feeder table.

  The indirect paper receiving is a method in which after the paper is positioned by the feeder table, the paper is first picked up from the swing claw and then transferred from the swing claw to the impression claw. In the delivery process, there are various forms of the swing mechanism, and the swing downward lever type is the most widely used form.

  Overfeed is distinguished from the above two methods. That is, when the paper positioning component is attached to the impression cylinder without being attached to the feeder table, and the paper is fed from the feeder table, the paper feeding speed is slightly larger than the speed of the impression cylinder surface, and this head of the speed is reduced. In this method, the paper is positioned by using it, and then the paper is picked up again from the impression nail.

  The swing lever type is applied to an indirect paper receiving type printing press. Currently, as an advanced swing system, its mechanical mechanism is an important research point in the printing industry.

  After the paper is positioned on the feeder table, generally, the paper is delivered by accelerating the paper from the stopped state to the same speed as the printing cylinder by a swing mechanism. In a sense, it determines the superiority or inferiority of the printing press performance.

  After the paper is positioned in front of it, it is in a stationary state and the swinging pawl is always opened in a stationary state to receive the paper to ensure registration accuracy.

  Since the conventional mechanism uses a lot of the upward lever-type swing mechanism with an eccentric to add the rotational operation of the collar with the eccentric, the operation of the swing claw becomes complicated.

  In addition, there is a large impact at high speed due to the inertia effect. Further, since the cam, the spring, and the constant force mechanism are used to ensure that the stress is applied uniformly, the mechanism becomes complicated and the requestability is reduced.

  Therefore, at present, a downward lever type swing mechanism is used in almost all high-speed offset printing presses.

  The present applicant has proposed a “downward lever type swing mechanism” in Patent Document 1. The operating principle is shown in FIG.

  The gear 180 and the swing claw cam 2 are driven and rotated by the main motor of the offset printing machine, and further, the drive gear 170 and the swing cam 1 are driven by the gear 180 exhibition, so that the swing cam 1 and the swing claw cam 2 have the same angular velocity. Rotate with

  The swing cam 1 and the swing claw cam 2 are composed of a conjugate curve main cam and auxiliary cam. At the same time, the outer peripheral curved surface of the main cam of the swing cam 1 and the outer peripheral curved surface of the auxiliary cam respectively drive a set of swing levers 3 and 16 to form a geometric closure. The outer peripheral curved surface of the main cam and the outer peripheral curved surface of the auxiliary cam of the swing claw cam 2 respectively drive a set of swing levers 14 and 400 to form a geometric closure.

  A set of swing levers 3 and 16 drives the swing base shaft 24 again to realize an expected swing (swing as designed). That is, the expected swing is realized by the driven swing.

  The lever 130 and the swing levers 14 and 400 are fixed to the same shaft with a key, and the lever 130 drives the lever-equipped cam 60 by driving the swing claw cam 2 to realize an expected swing. The cam 60 with the lever and the lever 130 are closed by the spring 50 in a normal printing state, and the convex surface (II in FIG. 2b) of the cam 60 with the lever (FIG. 2b) and the roller of the lever 130 are always in contact with each other. ing.

  When swinging from the swing lever 110 to the feeder table 40, it remains stationary for a while. At this time, the cam 60 with lever is swung counterclockwise from the lowest position to the highest position, the claw shaft 90 is driven by the opening / closing claw roller 100, the swing claw 80 and the claw base 70 are closed, and the paper is fed by the feeder table 40. By holding it, you can realize paper holding.

  The swing re-accelerates and swings downward counterclockwise. In this process, the cam with lever 60 is maintained at the highest position. That is, the swing claw 80 maintains the paper holding state.

  The swing lever 110 maintains the same speed as the transfer cylinder when swinging to the transfer position of the transfer cylinder.

  The lever-equipped cam 60 is swung clockwise from the highest position, the opening / closing claw roller 100 drives the claw shaft 90 to open the swing claw 80, and the paper is passed from the swing to the transfer cylinder, and normal paper is delivered. Is realized.

  When the delivery is completed, the paper is fed into the printing unit according to the rotation of the transfer cylinder, the swing lever 110 is swung downward, continues to decelerate slowly, and stops at the lowest position.

  After that, it slowly returns to the feeder table 40 again and waits for the next paper to be taken.

Chinese Patent No. ZL201120432850.0

However, according to the conventional technique described above, there are the following problems.
(1) The spring 50 is in a state where the boss of the lever-equipped cam 60 and the roller of the lever 130 are always in contact with each other. When the load of the spring 50 is changed, the vibration of the impact of the spring 50 is applied to the lever-equipped cam 60. There is a problem in that it adversely affects the delivery of paper during high-speed rotation.
(2) There is a problem that the mechanism of the cam 60 with lever is complicated and the cost is increased. That is, as shown in FIG. 2b, the lever-equipped cam 60 has two usage surfaces of a curved groove I and a boss II, so that it is difficult to ensure processing accuracy, and the mechanism is complicated and the cost is increased.

  Therefore, an object of the present invention is to provide a swing mechanism for an offset printing press that can improve the accuracy of swing claw opening / closing operation and can improve the swing reliability and stability of the overall mechanism. There is.

  In order to achieve the above object, the present invention provides a swing mechanism for an offset printing press including a transfer cylinder, a swing, a claw opening / closing mechanism, and a swing lever mechanism mounted between frames of an R side and an L side. , A swing original shaft attached between the R side frame and the L side frame, a swing lever fixed to both ends of the swing original shaft from the tip, respectively, and another shaft end of the swing lever A claw base mounting plate and a claw shaft attached thereto, a claw base attached to the claw base mounting plate at a plurality of intervals, a plurality of swing claws set on the claw shaft and corresponding to the claw base, and a claw shaft The claw opening and closing mechanism includes a claw opening and closing roller attached to the R side, and the claw opening and closing mechanism is composed of a driving gear fixedly attached to the R side shaft end of the transfer cylinder and a main cam and an auxiliary cam having an outer peripheral curved surface that forms a conjugate curve. A claw opening and closing cam that is fixedly attached to a shaft with a lever, and one shaft end of which comes into contact with the outer peripheral curved surface of the main cam and the outer peripheral curved surface of the auxiliary cam, respectively. The swing lever mechanism is composed of a drive gear meshing with the driving gear, a main cam and an auxiliary cam having an outer curved surface that is fixedly attached to the drive gear and the drive shaft and forms a conjugate curve. A set of swing cams that are fixedly attached to the R-side shaft end of the swing original shaft, and whose one shaft end abuts corresponding to the outer peripheral curved surface of the main cam and the outer peripheral curved surface of the auxiliary cam. A claw opening / closing mechanism, wherein the claw opening / closing mechanism includes an intermediate lever having one shaft end fixed to a shaft with a lever, and a connecting rod coupled to the other shaft end of the intermediate lever. , Rotation sensor And a cam with a lever having a front end portion and a rear portion to which respective shaft ends are coupled, and the cam with the lever is formed with an arc groove for rolling by sandwiching the claw opening and closing roller on the back surface of the front end portion, The rotary center is connected to a shaft with a cam, and the rear portion is connected to one shaft end of the connecting rod.

  In the above configuration, the cover-attached bracket is attached to the surface of the R-side frame, and the R-side shaft end of the transfer cylinder and the R-side shaft end of the swing base shaft are passed through the R-side frame, respectively. It is desirable to attach to the attachment plate, and attach the lever-attached shaft and the drive shaft between the R-side frame and the attachment plate of the cover-attached bracket.

  Moreover, it is desirable to attach the shaft with a cam to the back surface of the R-side frame with an L-shaped bracket.

  Further, it is preferable that an L-shaped bracket is attached to the back surface of the R-side frame, and the shaft with a cam is attached between the R-side frame and the L-shaped bracket.

  The shaft end of the second set of drive levers is preferably fixedly attached to the R-side shaft end of the swing source shaft with a key.

Since the swing mechanism for the offset printing press according to the present invention has the above-described configuration, the following effects can be obtained as compared with the conventional technology.
First, since there is no spring in the overall mechanism, the vibration of the cam with the lever and the spring when the spring pressure changes is avoided, and the paper delivery becomes gentle.
Second, since the lever-equipped cam is driven by the intermediate lever and the drive lever, not only is the space occupied by the swing mechanism reduced, but the swing mechanism can be further simplified.
Third, the cam with lever is provided with only one curved groove. The curved groove is processed into an arc groove, so that the structure of the cam with the lever is greatly simplified, and it is excellent in improving the processing accuracy, and the cost can be further reduced.

  The swing mechanism for the offset printing machine of the present invention is always adapted to improve the printing speed. That is, it can adapt to rapid swinging of the swing frequency, improve the accuracy of swing claw opening / closing operation, and improve the swing reliability and stability of the overall mechanism.

It is a principle figure of the downward lever type swing mechanism for offset printing machines of the existing technology. (A) is explanatory drawing of the structure of the cam with a lever of the downward lever type swing mechanism for offset printers of an existing technique, (b) is an orthographic view from the A direction of Fig.2 (a). It is sectional drawing of the swing mechanism for offset printing machines of this invention. It is a side view of the swing mechanism for offset printing machines of this invention. (A) is structure explanatory drawing of the cam with a lever of the swing mechanism for offset printing machines of this invention, (b) is an orthographic view from the B direction of FIG. 5a, (c) is FIG. 5a. Is an orthographic projection from C High School. It is a principle figure of the swing mechanism for offset printing machines of this invention.

  In order to better understand the present invention, it will be described in detail with reference to specific embodiments and drawings.

  3 to 5 show a swing mechanism for an offset printing press according to the present invention. The swing mechanism includes a transfer cylinder, a swing, a claw opening / closing mechanism, and a swing lever mechanism.

  As shown in FIGS. 3 and 4, the transfer drum 26 is attached between the R side frame 29 and the L side frame. A bracket 30 with a cover is attached to the surface of the R-side frame 29. An L-shaped bracket 28 is attached to the back surface of the R side frame 29. The R-side shaft end of the transfer drum 26 is inserted into the R-side frame 29 and attached to the mounting plate of the bracket 30 with cover by a bearing.

  The swing includes a swing original shaft 24 attached between the R side frame 29 and the L side frame, a swing lever 3 fixedly attached to both ends of the swing original shaft 24 from the front end, and the swing lever 3 A claw base mounting plate and a claw shaft 18 attached to the other shaft end, a claw base 20 attached to the claw base mounting plate at multiple intervals, and a plurality of claw bases 20 corresponding to the claw base 20 set on the claw shaft 18 A swing claw 19 and a claw opening / closing roller 17 attached to the R end of the claw shaft 18. The R-side shaft end of the swing original shaft 24 is passed through the R-side frame 29 and attached to the mounting plate of the bracket 30 with cover by a bearing.

  The claw opening / closing mechanism includes a driving gear 8, a claw opening / closing cam 2, a set of drive levers 4, 5, an intermediate lever 10, a connecting rod 11, and a lever-equipped cam 12.

  The driving gear 8 and the claw opening / closing cam 2 are fixedly attached to the R-side shaft end of the transfer drum 26. The claw opening / closing cam 2 is composed of a main cam and an auxiliary cam having an outer peripheral curved surface that is a conjugate curve. The shaft end of the set of drive levers 4 and 5 and the shaft end of the intermediate lever 10 are fixedly attached to the lever-equipped shaft 23 with a key. The lever-equipped shaft 23 is attached between the R-side frame 29 and the mounting plate of the bracket 30 with a cover by a bearing.

  Rollers attached to the other shaft ends of the set of drive levers 4 and 5 are arranged so as to be aligned one by one corresponding to the outer peripheral curved surface of the main cam of the claw opening / closing cam 2 and the outer peripheral curved surface of the auxiliary cam. . The shaft end of the connecting rod 11 is connected to the other shaft end of the intermediate lever 10.

  As shown in FIGS. 5A to 5C, the cam with lever 12 includes a rotation center and a front end portion 121 and a rear portion 122 connected to the rotation center. One shaft end of the rear portion of the cam with lever 12 is connected to one shaft end of the connecting rod 11. The rotation center of the cam 12 with lever is connected to the shaft 13 with cam by a bearing. The camshaft 13 is attached by a bearing between the L-shaped bracket 28 and the R-side frame 29.

  As shown in FIGS. 5A to 5C, an arc groove 120 is formed on the back surface of the tip 121 of the cam 12 with lever, and the claw opening / closing roller 17 is sandwiched between the arc grooves 120. Roll.

  The swing lever mechanism includes a drive gear 9, a swing cam 1, and drive levers 6 and 7.

  The drive gear 9 meshes with the driving gear 8. The swing cam 1 and the drive gear 9 are fixedly attached to the drive shaft 22. The swing cam 1 is also composed of an outer peripheral curved main cam and auxiliary cam that are conjugate curves.

  The drive shaft 22 is attached by a bearing between the R-side frame 29 and the attachment plate of the bracket 30 with cover. The shaft ends of the set of drive levers 6 and 7 are fixedly attached to the R-side shaft end of the swing source shaft 24 with a key. The rollers on the other shaft end of the set of drive levers 6 and 7 are provided so as to correspond one by one to the outer peripheral curved surface of the main cam of the swing cam 1 and the outer peripheral curved surface of the auxiliary cam.

  Hereinafter, the operation principle of the swing mechanism of the offset printing machine according to the present invention will be described with reference to FIG.

  The main motor of the offset printing machine drives the driving gear 8 and the claw opening / closing cam 2 and drives the driving gear 9 and the swing cam 1 through the driving gear 8 while rotating.

  The swing cam 1 and the claw opening / closing cam 2 can rotate at the same angular velocity. At the same time, the outer peripheral curved surface of the main cam of the swing cam 1 and the outer peripheral curved surface of the auxiliary cam respectively drive a set of drive levers 6 and 7 to form a geometric closure. The one set of drive levers 6 and 7 further drives the swing original shaft 24 from the key to realize the expected swing, and simultaneously drives the swing lever 3 to realize the expected swing.

  The outer peripheral curved surface of the main cam and the outer peripheral curved surface of the auxiliary cam of the claw opening / closing cam 2 respectively drive a set of drive levers 4 and 5 to form a geometric closure.

  The shaft end of the intermediate lever 10 and the set of drive levers 4, 5 are fixedly attached to the lever-equipped shaft 23 with a key, so that when the pawl opening / closing cam 2 is driven, one set of drive levers 4, 5 Oscillates along the outer circumference and rotates the lever-equipped shaft 23. As a result, the intermediate lever 10 swings according to the set of drive levers 4 and 5.

  Expected swinging of the cam 12 with lever can be realized by the connecting rod 11 connected to one shaft end of the intermediate lever 10. When the swing lever 3 swings to the feeder table 40 according to the set swinging rule of the expected swing, the stationary state is maintained for a while.

  At this time, the lever-equipped cam 12 swings counterclockwise from the lowest position to the highest position, the opening / closing claw roller 17 drives the claw shaft 18, closes the swing claw 19 and the claw base 20, and feeds paper to the feeder table 40. Make you scared. As a result, paper handling can be realized.

  Thereafter, the swing lever 3 is accelerated by the drive of the swing cam 1 and swings downward in the counterclockwise direction. In this process, the tip of the lever-equipped cam 12 is maintained at the highest position. That is, the swing claw 19 and the claw base 20 maintain the paper gripping state.

  When the swing lever 3 swings to the transfer position of the transfer drum 26, the swing claw 19 and the claw base 20 of the swing lever 3 maintain the same tape speed as the transfer drum 26.

  The tip 121 of the cam 12 with lever swings downward from the highest position clockwise by driving the claw opening / closing cam 2, and the opening / closing claw roller 17 drives the claw shaft 18 to open the swing claw 19 and the claw base 20. Thus, the paper is transferred from the swing to the transfer cylinder 26 to realize normal paper transfer.

  When the delivery is completed, the paper is fed into the printing unit according to the rotation of the transfer cylinder 26, the swing lever 3 is swung downward, and slowly decelerates. When it reaches the lowest position, it stops.

  After that, it slowly returns to the feeder table 40 again and waits for the next paper removal.

  The above examples are for illustrative purposes only and are not intended to limit the scope thereof. Engineers in this technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent techniques should also belong to the scope of the present invention and are limited by the scope of the claims.

DESCRIPTION OF SYMBOLS 1 Swing cam 2 Claw opening / closing cam 3 Swing lever 4, 5 Drive lever 6, 12 Cam with lever 7 Claw base 8 Driving gear 9 Drive gear 10 Intermediate lever 11 Connecting rod 12 Cam with lever 13 Shaft with cam 17 Claw opening / closing roller 18 Claw Shaft 19 Swing claw 20 Claw base 23 Shaft with lever 24 Swing original shaft 26 Transfer cylinder 28 L-shaped bracket 29 R side frame 30 Covered bracket 40 Feeder table 120 Arc groove 121 Front end portion 122 Rear portion

Claims (5)

In a swing mechanism for an offset printing press including a transfer cylinder, a swing, a claw opening / closing mechanism and a swing lever mechanism attached between the R side and L side frames,
The swing includes a swing original shaft attached between the R side frame and the L side frame, a swing lever fixedly attached to both ends of the swing original shaft from the tip, and the other of the swing lever. A claw base mounting plate and a claw shaft attached to the shaft end, a claw base attached to the claw base mounting plate at a plurality of intervals, a plurality of swing claws set on the claw shaft and corresponding to the claw base, and the claw base Includes a claw opening and closing roller attached to the R side of the claw shaft,
The claw opening / closing mechanism is fixed to a driving gear fixedly attached at the R side shaft end of the transfer drum, a claw opening / closing cam composed of a main cam and an auxiliary cam having an outer peripheral curved surface that is a conjugate curve, and a shaft with a lever. A set of first drive levers, one of which is attached to the outer peripheral curved surface of the main cam of the claw opening / closing cam and the outer peripheral curved surface of the auxiliary cam.
The swing lever mechanism includes a drive gear that meshes with the driving gear, a swing cam that is fixedly attached to the drive gear and the drive shaft, and includes a main cam and an auxiliary cam having an outer curved surface that is a conjugate curve, and the swing source A set of second drive levers which are fixedly attached at the shaft end on the R side of the shaft and whose one shaft end abuts corresponding to the outer peripheral curved surface of the main cam and the outer peripheral curved surface of the auxiliary cam, respectively. Including
The claw opening / closing mechanism includes an intermediate lever having one shaft end fixed to a shaft with a lever, a connecting rod connected to the other shaft end of the intermediate lever, and each shaft end connected to a rotation center. A levered cam having a distal end and a rear portion,
The lever cam is formed with an arc groove on the back surface of the tip portion so as to sandwich the claw opening / closing roller, and the rotation center is connected to the shaft with the cam and the rear portion is one end of the connecting rod. A swing mechanism for an offset printing machine, wherein the swing mechanism is connected to   A bracket with a cover is attached to the surface of the R-side frame, the R-side shaft end of the transfer cylinder and the R-side shaft end of the swing source shaft are respectively attached to the mounting plate of the bracket with cover through the R-side frame, 2. The swing mechanism for an offset printing press according to claim 1, wherein the lever-attached shaft and the drive shaft are respectively attached between the R-side frame and the attachment plate of the cover-attached bracket.   The swing mechanism for an offset printing press according to claim 1, wherein the cam shaft is attached to the back surface of the R-side frame with an L-shaped bracket.   2. The swing mechanism for an offset printing press according to claim 1, wherein an L-shaped bracket is attached to a rear surface of the R-side frame, and the cam-attached shaft is attached between the R-side frame and the L-shaped bracket.   2. The swing mechanism for an offset printing press according to claim 1, wherein the shaft end of the second set of drive levers is fixedly attached to the R-side shaft end of the swing original shaft with a key.

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