JPH0632354Y2 - Output cam switching device for chain delivery in offset printing machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a paper discharge to a paper discharge tray of the first printing unit 1 and a second paper discharge.
The present invention relates to an offset printing machine including a chain delivery paper discharge cam switching device capable of selectively switching between paper delivery to a numbering impression cylinder incorporated in a numbering device of a printing unit.

[Prior Art] In an offset printing machine in which the second printing unit is a numbering device, there are cases in which number printing is performed on the printing paper printed by the first printing unit and cases in which number printing may not be performed. However, since the conventional printing machine including the numbering device in the first printing unit and the second printing unit does not take into consideration both of the above cases, the printing paper can be printed even when the number printing does not have to be performed. Will pass through the numbering device of the second printing unit and will be ejected to the ejection tray of the second printing unit. Therefore, when passing through the numbering impression cylinder or chain delivery of the second printing unit, the paper tail Floating and flapping,
Since the printed surface is scratched and the numbering device is idled unnecessarily, there are drawbacks such as rapid wear of the device. Therefore, the paper delivery cam for opening and closing the gripper is rotated through the cam holder on the chain delivery sprocket shaft (driven shaft) of the first printing device by the required angle about the sprocket shaft, and the paper is ejected to the paper ejection tray of the first printing unit. Numbering is performed by switching one discharger cam for gripper opening and closing in two steps so that the paper (when number printing is not required) and the paper is transferred to the numbering impression cylinder incorporated in the numbering device of the second printing unit (when numbering is required). Japanese Unexamined Utility Model Publication No. 60-123237 discloses a technique relating to a paper discharge cam switching device that prevents printing paper from passing through the second printing unit when unnecessary.

Further, Japanese Patent Application Laid-Open No. 58-167348 discloses a technique relating to a device for opening and closing the chain gripper at an arbitrary position such as the first paper ejection tray and the second paper ejection tray and at an arbitrary speed.

[Problems to be Solved by the Invention] However, in the paper discharge cam switching device disclosed in Japanese Utility Model Laid-Open No. 60-123273, when the numbering device of the second printing unit is used (number Depending on the purpose of use (when printing is required) and when it is not used (when number printing is not required), rotate one paper ejection cam by the required angle around the sprocket shaft and use it as a paper delivery cam, or a paper ejection cam. Since the configuration is used as, the optimum position for delivering the paper to the numbering impression cylinder incorporated in the numbering device of the second printing unit and the paper delivery of the chain gripper incorporated in the chain delivery of the first printing unit at the time of delivering the paper. Optimum opening and closing speed of the first
The optimal paper ejection position for ejecting paper to the paper ejection tray of the printing unit and the optimal paper ejection opening / closing speed of the chain gripper are not the same, and the change in printing speed of the offset printing machine and the type of printing paper (difference due to paper quality and thickness) However, there is a problem that it is difficult to widely deal with the change in the paper discharge state due to (1). Further, the optimum paper discharging position for discharging the printing paper held by the chain gripper attached to the chain delivery disclosed in Japanese Patent Laid-Open No. 58-167348 to an arbitrary paper discharging tray and the optimum opening / closing of the chain gripper for discharging paper. The paper output switching device for obtaining speed has a large number of parts such as a hydraulic unit, a hydraulic cylinder, and a set of several gears, and since the device itself is large, it can be provided around the driven shaft of the first printing unit. In addition, the configuration is only for switching to an arbitrary discharge tray, and the paper delivery to the numbering impression cylinder of the second printing unit is not considered, and the paper delivery is performed by using the device. It is difficult to do so.

The present invention has been made in view of the above problems of the prior art, and discharges paper to the paper discharge tray of the first printing unit and paper to the numbering impression cylinder incorporated in the numbering device of the second printing unit. Dedicated cams for delivery are formed by changing the position in the driven axis direction, and each cam can be slidably switched in the driven axis direction according to the different purpose of paper ejection and paper delivery. In the case of paper, it is configured so that the optimum position of paper discharge to the paper discharge table and the optimum position of paper transfer in the case of paper delivery can be obtained, and rotation adjustment is performed around the driven shaft of the paper discharge cam and the paper transfer cam. By doing so, it is possible to provide an optimum opening / closing speed of the chain gripper for each purpose, and provide a delivery cam switching device for chain delivery in an offset printing machine that is small and can be easily installed around the driven shaft. To that there is, is its purpose.

[Means for Solving the Problems] In order to achieve the above-mentioned object, a discharge cam switching device for chain delivery in an offset printing machine according to the present invention is configured to discharge to a discharge tray of a first printing unit and to perform second printing. An offset printing machine equipped with a paper delivery cam switching device for chain delivery capable of selectively switching between paper delivery to a numbering impression cylinder incorporated in a numbering device of the unit, in the axial direction of a driven shaft of the chain delivery. With a cam holder that is installed while the movement of the chain is blocked, a delivery cam for opening / closing the chain gripper and a paper delivery cam only for delivering the paper to the numbering impression cylinder are driven shafts. Is attached to the cam follower of the chain gripper while being mounted so as to be rotatable in the axial direction and slidably in the axial direction. Provided is an axial cam switching means capable of selectively switching between contact with and separation from the delivery cam and the delivery cam, and the delivery cam and the delivery cam in the circumferential direction of the driven shaft. A circumferential cam adjusting means for rotating and adjusting the circumferential position is provided.

[Operation] In the delivery cam switching device for chain delivery configured as described above, when it is necessary to perform number printing on the printing paper in the first printing unit, the chain gripper provided in the chain delivery of the first printing unit The paper is delivered together with the paper output cam by the cam switching means that slides in the axial direction of the driven shaft so as to come into contact with the paper delivery cam for delivering the paper to the numbering impression cylinder incorporated in the numbering device of the second printing unit. Sliding the delivery cam in the axial direction causes the delivery cam to come into contact with the cam floor at the optimal delivery position, and the delivery cam, along with the delivery cam, is minute in the circumferential direction of the driven shaft. By rotating and moving, the contact position between the paper delivery cam and the cam floor changes slightly, making it ideal for paper delivery. At the position, the chain gripper opens and acts to transfer the paper to the numbering impression cylinder. When it is not necessary to perform the number printing on the printing paper printed by the first printing unit, the paper delivery cam is moved in the axial direction of the driven shaft together with the paper delivery cam so that the cam floor and the paper delivery cam come into contact with each other. Then, the chain gripper opens at the optimum position for discharging to the discharge tray of the first printing unit to perform discharge, and further, by the circumferential discharge cam adjusting means, the discharge cam linked with this is operated. The chain gripper opens at the optimum position for paper ejection by finely rotating the driven shaft in the circumferential direction, so that the paper is ejected to the paper ejection tray.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIG. 5 shows an offset printing machine equipped with a first printing unit and a numbering device 2 of the second printing unit.

The first printing unit 1 is a printing unit that performs normal printing, and includes a plate cylinder 3, a humming cylinder 4, a pressure copper 5, an ink section 6, a water section 7, a chain gripper 8 and the like, and the paper a is a paper feeding section. 9
From a paper feed copper 10 to be fed between the blanket cylinder 4 and the pressure copper 5 to be printed, and held by a plurality of chain grippers 8b provided on the chain 8a of the chain delivery 8. The paper is discharged to the paper discharge table 14 or the second
The paper is passed from the chain gripper 8b to a gripper (not shown) of the numbering impression cylinder 15 incorporated in the numbering device 2 of the printing unit, and the numbering impression cylinder 15 is delivered.
The sheet is numbered by being fed between the numbering cylinder 17 and the numbering cylinder 17, and provided on the numbering device 2 of the second printing unit by the chain gripper 19e of the chain delivery 19 incorporated in the numbering device 2 of the second printing unit. Further, the sheet is discharged to the sheet discharge table 20.

The chain 8a of the chain delivery 8 of the first printing unit 1 is wound around a sprocket (not shown) that rotates integrally with the drive shaft 11 and a sprocket 13 of a driven shaft 12 that is installed on the numbering device 2 side. 8 are configured.

On the other hand, the numbering device 2 of the second printing unit is composed of a horizontal sewing machine and a vertical sewing machine 16 of the numbering impression cylinder 15, a numbering printing cylinder 17, an ink section 18, a chain delivery 19, a discharge tray 20, and the like. The chain delivery 19 is provided with a sprocket 19b that rotates integrally with the drive shaft 19a, a sprocket 19b and a sprocket 19c that is a driven shaft that is erected at a required interval.
9d is wound around to form paper a on the chain 19
a plurality of chain grippers 19e provided in d
It is configured to be discharged onto the paper discharge table 20.

A gear 21 fixed to the driven shaft 12 and a gear (not shown) fixed to the numbering impression cylinder 15 are meshed with each other through a gratch (not shown), so that the first printing unit and the second printing unit. The numbering device 2 is connected in an interlockable manner.

The chain delivery paper discharge cam switching device in the offset printing machine configured as described above is configured as follows.

As shown in FIGS. 1 to 4, a cam holder 22 is rotatably attached to the driven shaft 12 through a needle bearing 23, and a collar 25 fixed to the sprocket 13 and the driven shaft 12 with a screw 24. The movement is blocked in the axial direction by means of and the exterior is provided on the cam holder 22 so that the discharge cam 26 and the paper delivery cam 27 can rotate in the circumferential direction and can slide in the axial direction. When the number printing is unnecessary by the cam switching means 28 in the axial direction, the discharge cam 26 contacts the cam floor 29.
When number printing is required, the paper delivery cam 27 contacts the cam floor 29, and the paper delivery cam 26 and the cam follower 29 separate from each other so that the paper delivery cam 26 and the paper delivery cam 27 contact each other. The cam follower 29 of the chain gripper 8b which is opened and closed by contact is provided so as to be selectively movable in the axial direction of the driven shaft 12, and is driven by the circumferential cam rotation adjusting means 30. It is possible to adjust the rotation of the chain gripper 8b in the circumferential direction of the chain gripper 8b, and it is possible to set the optimum opening and closing position of the chain gripper 8b and finely adjust the opening and closing position of the chain gripper 8b. It is configured so that it can respond to changes and changes in printing conditions such as high speed operation and low speed operation.

As shown in the figure, the cam switching means 28 rotatably supports the cam holder 22 while passing through a screw shaft 31 provided with a knob 31a, and is prevented from moving in the axial direction by a collar 32. The hole 34 of the holder 34 whose tip is fixed by the screw 33 of the cam holder 22
a is rotatably engaged with the screw shaft 31, and the paper discharge cam 26 and the paper delivery cam 27 are screwed into the screw shaft 31 and the knobs 31a are rotated to move the cams 26, 27 to the screw shaft 31.
Can be formed so as to be movable in the axial direction of the driven shaft 12 along.

When the print paper a held by the chain gripper 8b is delivered to a gripper (not shown) provided on the numbering impression cylinder 15, the paper delivery cam 27 and the cam follower 29 of the chain gripper 8b are provided. Is moved to the holder 34 side in the axial direction of the driven shaft 12 by using the axial cam switching means 28 at a position where the paper discharge cam 26 and the cam follower 29 are in contact with each other. Since the position of 12 in the axial direction changes, it is configured so as not to abut.

The cam profile of the paper delivery cam 27 is formed such that when the cam follower 29 is in contact, the printing paper a held by the chain gripper 8b releases the paper at the optimum position to be delivered to the gripper (not shown) of the numbering impression cylinder 15. Has been done.

Further, by finely adjusting the rotation of the paper delivery cam 27 in the circumferential direction of the driven shaft 12 by the circumferential cam adjusting means, the contact position when abutting against the cam follower 29 is slightly changed.
Since the open / close position of the chain gripper 8b changes slightly, it is formed so as to be compatible with changes in printing speed, paper quality, and paper thickness, and the cam profile of the paper ejection cam 26 is also used when ejecting to the paper ejection tray 14. The open / close position of the chain gripper 8b changes, and the chain gripper 8b is formed so as to adapt to changes in printing speed, paper quality, paper thickness, and the like.

When the numbering device 2 of the second printing unit is not used (when the number printing is not necessary), the cam follower 29 of the chain gripper 8b is brought into contact with the paper ejection cam 26 by using the axial switching means 28 to eject the paper ejection cam. 26 is moved toward the holder 34 side in the axial direction of the driven shaft. At this time, the paper delivering cam 27 and the cam follower 29 do not come into contact with each other because they are axially separated.

When the paper discharge cam 26 and the cam follower 29 come into contact with each other, the chain gripper 8b releases the held paper a (FIG. 3) to the paper discharge tray 14, and the front guide 49 aligns the paper a in the paper conveyance direction. The guides 48 are arranged so as to be aligned in the direction perpendicular to the paper conveyance direction.

The paper delivery cam 27 may be formed integrally with the paper delivery cam 26 as clearly shown in FIGS. 1 and 2, or the paper delivery cam 26 and the paper delivery cam 27 may Three
It may be formed as a separate body as clearly shown in FIGS. 4 and 5. In such a case, the paper ejection cam 26 is attached to the cam holder 22 in the same manner as described above, and the paper ejection cam 26 is used for delivering the paper. With the cam 27 stacked in the axial direction, the discharge cam 2
6 is rotatably supported by a pin 36, and when the numbering device 2 is not used, as shown by a solid line in the figure, the chain gripper 8b is fixed on the paper discharge cam 26 with a bolt 36. When the numbering device 2 is used, the cam follower 29 is held so that it does not come into contact with the cam follower 29, the bolt 36 releases the fixation as shown by the chain double-dashed line in FIG. It is fixed by a bolt 37 so that the cam follower 29 is held at a position where it abuts. By separately forming and assembling the cams 26 and 27 in this manner, the delivery cam 26 can be easily attached to and detached from the driven shaft 12.

Further, as shown in FIG. 2, the cam switching means 28 is arranged such that the screw shaft 31 is screwed into the cams 26 and 27, respectively, and the screw shaft 31 is rotated by a knob 31a as shown in FIG. , 27 are simultaneously moved and adjusted in the axial direction.

The cam rotation adjusting means 30 can be formed as shown in FIGS. 1 to 4. Numbering device 2
Brackets 3 fixed to the frame 38 of the frame at intervals
A bolt 40 is rotatably installed on the shaft 9 and 39 'in a state where the bolt 40 is prevented from moving in the axial direction. One end of a link 43 is rotatably attached to the block 41 by a fulcrum pin 42 so that the link 4
Fulcrum pin 4 fitted and supported in a hole 43a formed at the other end of
4 is inserted into the hole 26c of the extended end portion 26b extending in the radial direction from the paper discharge cam 26 so as to be rotatable and axially slidable, and the fulcrum pin 44 is attached to the holder 34.
From the mounting end 34b extending radially from the mounting hole 34c
The bolt 41 is passed through and fixed with a setscrew 45, etc., whereby the block 41 is rotated by rotating the bolt 40.
0a and the holder 34 through the link 43.
The paper discharge cam 26 and the paper delivery cam 27 are driven shafts 1.
2 is rotated in the circumferential direction, and each of the cams 26, 2
7, the opening / closing position of the chain gripper 8b, that is, the optimum opening / closing position of the chain gripper 8b for delivering the paper to the numbering impression cylinder 15, is finely adjusted, and the print speed, the paper quality, the paper thickness, and the like are changed on the discharge tray 14. Even if there is a jam, it is formed so that it can be ejected in a neatly aligned state.

Here, the fulcrum pin 44 slides and guides the discharge cam 26 in the axial direction of the driven shaft 12 by operating the cam switching means 28 in the axial direction, and links by operating the cam rotation adjusting means 30 in the circumferential direction. Since it functions to rotate the holder 34, the paper discharge cam 26, and the paper delivery cam 27 in the circumferential direction via 43, the numbering impression cylinder 1
5, when the optimum opening / closing position of the chain gripper 8b at the time of delivering the paper to the sheet 5 and the optimum opening / closing position of the chain gripper 8b at the time of paper discharge are finely adjusted, the play of the cam rotation adjusting means 30, that is, the block 41 when the bolt 40 rotates. When the backlash in the circumferential direction is transmitted to the fulcrum pin 44 via the link 43,
Since the fulcrum pin 44 is twisted with respect to the driven shaft 12, the rotation adjustment of the cams 26 and 27 in the circumferential direction is not smoothly performed, and when the fulcrum pin 44 swings in the circumferential direction, the chain gripper 8b moves. Cam follower 29 to cam 26
Alternatively, the contact position with 27 changes.

Therefore, in the present invention, the fulcrum pin 44 is fixed to the holder 34 as described above and provided in parallel with the driven shaft 12 so that the fulcrum pin 44 is always held in parallel with the driven shaft 12. Cam 2 when switching cams
6 and the fulcrum pin 44 are prevented from twisting at the time of adjusting the sheet release timing.

Further, the cam rotation adjusting means 30 can be formed as shown in the examples of FIGS. 6 and 7. A bolt 40 is rotatably installed on two brackets 39, 39 'fixedly mounted on the frame 38 of the numbering device 2 at intervals so as to prevent axial movement, and a block 41 is attached to a screw portion 40a of the bolt 40. One side surface of the link 43 is non-rotatably screwed to the frame 38, and one end of a link 43 is rotatably attached to the block 41 by a fulcrum pin 42.
The fulcrum pin 44 supported on the other end of
To the hole 26b at the extension end extending in the radial direction from
In addition, the guide plate 45 fixed to the frame 38 is slidably inserted and slidably engaged with a long hole 46 arcuately formed on an imaginary circumferential line centered on the axis of the driven shaft 12. By rotating the bolt 40, the block 41 moves along the threaded portion 40a, so that the cam 27 rotates in the circumferential direction of the driven shaft 12 through the link 43 together with the paper discharge cam 26 so as to deliver the paper. , Thereby each cam 2
The chain gripper 8b is opened and closed by 9,27.

Opening / closing position, that is, the optimum opening / closing position of the chain gripper 8b when the paper is delivered to the numbering impression cylinder 15 and the paper ejection tray 14
The optimum opening / closing position of the chain gripper 8b at the time of paper discharge may be finely adjusted.

In the illustrated example, the second printing unit is the numbering device 2
However, the present invention is not limited to this, and other known printing units can be used.

[Advantages of the Invention] Since the present invention is configured as described above, the chain gripper 8b of the chain delivery 8 is used when the second printing unit such as the numbering device 2 is used and when it is not used. In order to open and close, a paper discharge cam 26 for discharging paper and a paper delivery cam 27 for only paper delivery are provided around the driven shaft 12, respectively. Therefore, a cam corresponding to each purpose is provided. Since it can be arranged in a shape and an optimum position, it is possible to perform optimum paper discharge and paper delivery, and to use the paper discharge cam 26 when the second printing unit such as the numbering device 2 is used and when not used. The switching of the paper delivery cam 27 is not only easily and easily performed by the cam switching means 28, but also easily by operating the cam adjusting means 30 in the circumferential direction. And the paper delivery cam 26 and the paper delivery cam 2
By finely adjusting 7 in the circumferential direction of the driven shaft 12, the contact position between both cams and the cam follower 29 of the chain gripper 8b can be finely adjusted. Therefore, it is possible to change the printing speed, the paper quality and the paper thickness. There is an effect that it is possible to quickly respond to changes in the paper discharge condition and the paper delivery condition, and moreover, it can be compactly arranged around the driven shaft 12.

[Brief description of drawings]

FIG. 1 is a side view of an anti-operating side showing a delivery cam switching device for chain delivery in an offset printing machine according to the present invention, FIG. 2 is a vertical plan view taken along the line II-II in FIG. 1, and FIG. FIG. 4 is a side view of the other side of the same device on the side opposite to the operating side, FIG. 4 is a vertical plan view taken along the line IV-IV in FIG.
FIG. 5 is a schematic view of an operating side of an offset printing machine including a first printing unit and a numbering device as a second printing unit, and FIGS. 6 and 7 show other adjusting means of the device. FIG. 7 is a side view on the operating side and a vertical plan view taken along the line VII-VII in the same figure. 1 ... 1st printing unit, 2 ... numbering device 8 ... chain delivery, 8b ... chain gripper 12 ... driven shaft, 22 ... cam holder 26 ... paper ejection cam, 27 ... paper delivery cam 28 ... Cam switching means, 29 ... Cam follower 30 ... Cam rotation adjusting means, 34 ... Holder 43 ... Link, 44 ... Support point pin

Claims (1)

[Scope of utility model registration request] 1. A chain capable of selectively switching between delivery of paper to a delivery tray 14 of the first printing unit 1 and delivery of paper to a numbering impression cylinder 15 incorporated in the numbering device 2 of the second printing unit. In an offset printing machine equipped with a delivery cam switching device for the delivery 8, the chain gripper 8b is mounted on the driven shaft 12 of the chain delivery by interposing a cam holder 22 which is externally mounted in a state in which axial movement is blocked. A paper ejecting cam 26 for only opening and closing and a paper delivering cam 27 for only delivering the paper to the numbering impression cylinder are rotatable about the driven shaft, and
Axial cam switching means which is mounted so as to be slidable in the axial direction, and is capable of selectively switching between contact and disengagement with the cam follower 29 of the chain gripper with respect to the paper discharge cam and the paper delivery cam. 28 is provided, and the cam for ejecting the paper and the cam for delivering the paper are rotated in the circumferential direction of the driven shaft, and a cam adjustment means 30 for adjusting the circumferential position is provided. Chain delivery paper delivery cam switching device for offset printing machines.