JPH0380630B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a surface printing section consisting of a first blanket cylinder and a first plate cylinder, a second blanket cylinder that also serves as an impression cylinder, and a second plate cylinder. The present invention relates to a form roller control device for a back printing section in an offset double-sided printing machine, which includes a back printing section and a back printing section.

[Prior Art] The above-mentioned printing press not only can reduce the number of printers compared to the known printing press consisting of two printing presses each having a blanket cylinder, a plate cylinder, and an impression cylinder installed side by side, but also can simplify other devices. Therefore, the overall structure is simple, lightweight, and compact, but in conventional double-sided printing machines of this type, the first
When paper is fed between the blanket cylinder and the second blanket cylinder, there is a common problem that the switching operation between duplex printing and single-sided printing becomes complicated and difficult because printing is performed on both the front and back sides of the paper at the same time. .

[Problems to be Solved by the Invention] The present invention is an attempt to solve the above-mentioned problems.In the back printing section, a form roller and a roller are pivotally supported by a link mechanism pivotally supported on a frame, and the rollers are in contact with each other. A cam, which is pivotally supported on a frame so as to be able to drive the form roller into and out of contact with the second plate cylinder, and a dart provided so as to be interlocked with the rotation of the printing press are connected by a link. , by switch operation
A solenoid that can be switched ON and OFF is connected by a link, and by operating the above switch, the form roller can be brought into contact with and separated from the second plate cylinder of the back printing section independently from the front printing section. The purpose of this is to enable easy switching between double-sided printing and single-sided printing by configuring the printer.

[Means for Solving the Problems] That is, the present invention provides a first blanket cylinder, a first printing cylinder and a second blanket cylinder which are respectively pivotally supported to be detachably and attachably to the first blanket cylinder; In a double-sided printing machine equipped with a second plate cylinder that is rotatably supported on a second blanket cylinder, the form is attached between a cam rotatably supported on a frame and an intermediate roller. Printing with the cam, which pivots a link mechanism that pivotally supports the roller and the roller, and is provided so that the form roller, which contacts the roller and contacts the intermediate roller, can be driven into contact with and away from the second plate cylinder. A dart that can be linked to the rotation of the machine is connected with a link, and a solenoid that can be turned on and off by a switch operation is connected with a link, and the surface is turned on and off by switching the solenoid on and off. The above-mentioned problem was solved by configuring the form roller separately from the printing section so as to be able to come into contact with and separate from the second plate cylinder of the back printing section.

[Embodiment] An embodiment of the present invention will be described below in detail based on the drawings. First, as shown in FIG. The supported first rubber cylinder 2 and the first rubber cylinder 2
A first plate cylinder 3 and a second blanket cylinder 4 are supported on frames 1 and 1 by eccentric shafts 6 and 7, respectively, and can be detached and attached to the second blanket cylinder 4. A second plate cylinder 5 is pivotally supported on frames 1, 1 by an eccentric shaft 8.
, a paper feed device 9, a paper discharge device 10, a first and a second
Both inking devices 11 and 12, both first and second moisture supply devices 13 and 14, and both first and second plate supply devices 1
5, 16, and both first and second plate ejecting devices 17, 18
A back printing section A and a front printing section B are constituted by the first and second blank cleaning devices 19, 20, etc.

The form roller control device of the back side printing section A of the present invention is constructed as follows.

As shown in FIG. 1, in the back printing section A, a cam 21, an intermediate roller 22, and an ink font roller 23 are rotatably mounted on frames 1, 1 on support shafts 24, 25, and 26, respectively. The cam 21 is rotatably supported, and there are 4 rollers between the cam 21 and the intermediate roller 22.
The intermediate part of the link mechanism 27, which is formed in a substantially horizontal M-shape from the front with links 27', 27'', 27, 27''''', is pivotally supported on the frame 1 by a support shaft 28. Form rollers 29, 29 are pivotally supported at both ends of the link mechanism 27, and rollers are provided at the pivot points of the links 27' and 27 and the links 27'' and 27'''', respectively. 30, 30 are pivotally supported, and the respective foam rollers 29, 29
is provided around the intermediate roller 22, and
The rollers 30, 30 in contact with the cam 21 are provided so as to be able to be driven into and away from the second plate cylinder 5;
The intermediate roller 22 is rotated by the springs 31 and 32.
Appropriate contact pressure is applied to the second plate cylinder 5.

The cam 21 has a radial step formed on an arcuate surface centered on the support shaft 24 to form a high cam surface 21a and a low cam surface 21b, and is interlocked with rotation after printing by a mechanism to be described later. It is connected to a dart 33 that moves up and down by links 34 and 34'.

The dart 33 meshes with a gear 39 fixed to one end of the first blanket cylinder 2 of the printing press, which is driven to rotate by meshing with a drive gear 41 rotated by a motor (not shown), via an intermediate gear 40. The upper unit is pivotally supported on an eccentric shaft 38 that stands up on the side of a gear 37, and is provided so that it can move up and down in conjunction with the rotation of the printing press.
A solenoid 35 that is turned ON and OFF by a switch provided separately from the energization switch for 5 etc.
The solenoid 35 is connected to the solenoid 35 by a link 36.
The contact position of the lower end with respect to the arm 34' can be changed by switching ON and OFF.

Therefore, with the above configuration, the form rollers 29, 29 of the back side printing section A are in the back side printing state shown in FIG.
That is, when the solenoid 35 is switched from the OFF state to the ON state and the energization switch is turned ON using the operating lever, the solenoid 35 moves the dart 33, which moves up and down in conjunction with the rotation of the printing press, in the right direction in the drawing. arm 3 at the lower end of the arrow 33.
4' is pushed down, the arm 34' is rotated clockwise, and at the same time, the arm 34 connected to the other end is pushed leftward in the drawing to rotate the cam 21 clockwise. Since the rollers 30, 30 come into contact with the high cam surface 21a, they are separated from the second plate cylinder 5, and the back surface is not printed.Conversely, after switching the solenoid 35 from the ON state to the OFF state, use the operating lever. When you turn on the power switch,
The lower end of the dart 33 pushes down the left side of the arm 34' and rotates it counterclockwise, causing the cam 21 to rotate counterclockwise, and the rollers 30, 30 contact the lower cam surface 21b, so that the lower end of the arm 34' is rotated counterclockwise. Form rollers 52, 5 of the inking device of the front side printing section B, which will be described later, are provided so as to come into contact with the second plate cylinder to print on the back side.
Separately from the second plate cylinder 5, it is formed so as to be able to come into contact with and separate from the second plate cylinder 5.

Reference numeral 42 denotes an ink ductor roller, which is swingably attached to a frame by a cam 44 fixed to an operating shaft 43 of the printing press shown in FIG. When an operating lever (not shown) fixed to the operating shaft 43 is switched to a predetermined position, the control lever (not shown) is connected to an arm 46 which is pivotally mounted on a support shaft 45 to an arm 46 via links 47, 48, an arm 49, etc., and is fixed to the operating shaft 43. Power is transmitted from the printing machine at
2 and 23 alternately.

As shown in FIG. 2, the inking device of the surface printing section B has a cam 50 and a link mechanism 51 pivotally mounted on the frame 1.
There are foam rollers 52, 52 and rollers 53, 5.
3 are pivotally supported, and the rollers 53, 53 are in contact with the cam 50, and an intermediate roller 54 is in contact with the form rollers 53, 53 and is pivotally supported on the frame 1; An ink gutter roller 56 is swingably disposed between the ink font rollers 55.

The cam 50 is connected to the operating shaft 43 and the link 43.
The cam 50 is connected to the operating shaft 43 and is rotatably provided by an operating lever (not shown) fixed to the operating shaft 43, and when the cam 50 is rotated forward or backward, the cam 21 in the back side printing section A described above is rotated. Similarly, the form rollers 52, 52 are formed so as to be able to come into contact with and separate from the first plate cylinder 3, and the ink duct roller 56 is connected to the arm 46 by a link 57, an arm 58, etc. There is,
Similar to the ink duct roller 42 in the back printing section A described above, the two rollers 54,
55 so that they can be contacted alternately.

In other words, the ink duct rollers 42 and 56 of the back side printing section A and the front side printing section B swing at the same time when the cam 44 is operated by the operation lever in the printing state where the cylinder is loaded, or at the same time. While it is linked so that the swinging is stopped,
The contact and separation of the form rollers 52, 52 with respect to the first plate cylinder 3 of the front side printing section B is carried out by a cam 50 that is linked to an operating lever, and the contact and separation of the form rollers 29, 29 with respect to the second plate cylinder 5 of the back side printing section A is performed. - Release is performed by a cam 21 that can be switched by a solenoid 35, and is provided so that interlocking with an operating lever can be selected.

[Effects of the Invention] As explained above, since the form roller control device of the back printing section in the double-sided printing machine according to the present invention is configured, each of the form rollers 52 of the front printing section B and the back printing section A, 52, 29, 2
9 is a switch for a solenoid 35 so that the respective cams 50 and 21 can be interlocked by an operating lever or the like.
When set to ON, double-sided printing is possible by touching and separating the first plate cylinder 3 and the second plate cylinder 5 at the same time, but the form rollers 29 and 29 of the back printing section A
In this type of double-sided printing machine, it is possible to make contact with and release from the second plate cylinder 5 separately from the form rollers 52, 52 of the front surface printing section B by switching the solenoid 35. , it is possible to freely switch between double-sided printing (front and back sides) and single-sided printing (front side) by simply turning the solenoid 35 ON and OFF. 21, the dart 33, the solenoid 35, and the link 3 that connects them.
4, 36 and is easy to form,
There are almost no failure-causing elements, so there are almost no operational troubles, and it can be manufactured at low cost.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the form roller control device of the back side printing section in a duplex printing machine according to the present invention, FIG. 2 is a front view showing an inking device of the front side printing section, and FIG. FIG. 2 is a schematic diagram of a printing press. 1...Frame, 2...First blanket cylinder, 3...First plate cylinder, 4...Second blanket cylinder, 5...Second plate cylinder, 2
1... Cam, 22... Intermediate roller, 27... Link mechanism, 29, 29... Form roller, 30,
30... Laura, 33... Tosiya, 34, 36...
Link, 35... Solenoid, A... Back side printing section, B... Front side printing section.

Claims (1)

[Claims] 1 A first blanket cylinder 2, a first plate cylinder 3 and a second blanket cylinder 4 which are respectively pivotally supported to be detachably and attachably to the first blanket cylinder, and which are detachably and attachably to the second blanket cylinder. In a double-sided printing machine, the cams 2 are rotatably supported on the frame 1, and the second plate cylinder 5 is rotatably supported on the frame 1.
1 and the intermediate roller 22, the form roller 2
9, 29 and rollers 30, 30, respectively, are pivotally supported, and the rollers are in contact with each other, and the form roller, which is in contact with the intermediate roller, can be driven into contact with and away from the second plate cylinder. A link 34 connects the above-mentioned cam and a toss arrow 33 which is provided so as to be interlocked with the rotation of the printing press, and a link 36 connects the toss arrow to a solenoid 35 which can be turned on and off by operating a switch. Then, turn on/off the solenoid.
A form of a back printing section in a double-sided printing machine, characterized in that the form roller is provided so as to be able to come into contact with and separate from the second plate cylinder of the back printing section A separately from the front printing section B by switching. Roller control device.