JPH084293Y2 - Printing pressure adjustment device for rotary printing press - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a printing pressure adjusting device for adjusting a printing pressure applied to a paper to be printed between a plate cylinder and an impression cylinder at the time of printing in a rotary printing press. It is a thing.

[Conventional technology]

In a rotary printing machine, for example, an intaglio printing machine, the surface of the intaglio plate mounted on the peripheral surface of the intaglio cylinder is in pressure contact with the peripheral surface of the impression cylinder, and the paper conveyed by being gripped by the claws of the impression cylinder is conveyed. A large printing pressure acts when passing through the pressure contact surface between the intaglio surface and the impression cylinder, and the image on the intaglio surface is transferred to the paper under pressure by the printing pressure to perform printing.

The printing pressure at the time of printing needs to be adjusted according to the paper thickness, specifications of the printed matter, etc., and conventionally, a printing pressure adjusting device is provided on the impression cylinder side. This type of conventional printing pressure adjusting device is provided with left and right eccentric bearings whose outer peripheral surfaces are rotatably fitted in bearing holes of the left and right frames, and the shaft center is eccentric with respect to the outer peripheral surfaces of the eccentric bearings. Both end shafts of the impression cylinder are rotatably supported in the inner hole, and by rotating the left and right eccentric bearings by the same amount, the impression cylinder moves parallel to the intaglio surface and printing pressure is applied. Is adjusted. As the rotation adjusting means for the eccentric bearing, conventionally, the left and right hydraulic cylinders for attaching and detaching the impression cylinder are supported so as to be movable and movable in the advancing and retracting directions of the piston rod, and the left and right hydraulic cylinder supporting members are individually moved while observing the scale. In this case, a turn bag is provided at the intermediate portion of the connection between the hydraulic cylinder and the eccentric bearing, and the left and right turn bags are individually expanded and contracted.

[Problems to be solved by the invention]

However, in such a conventional printing pressure adjusting device, in the former case in which the support member is moved and adjusted while observing the scale, the left and right eccentric bearings may be erroneously operated or the scale mechanism may not operate normally. It is difficult to adjust the pressures so that they are in phase, and the left and right end shafts of the impression cylinder may be eccentric and twisted, resulting in damage to the bearings of the impression cylinder or defective tooth contact of the gear, resulting in a serious accident. There was a risk of becoming.
The latter, which adjusts the turn bag, also has the same drawbacks, and the turn bag is heavy in rotation, resulting in poor operability. In addition, the operation will be heavy unless you operate both left and right sides at the same time.
It was not possible to save labor as it was operated by a person, and it was impossible to make adjustments while the machine was running.

[Means for solving problems]

The present invention has been made in view of the above points, and the bearings in which the shaft center of the outer periphery and the shaft center of the inner hole which are fitted in the shaft holes of the left and right frames are eccentric are freely rotatable. These left and right bearings are connected to each other by a tubular member, and a shaft that penetrates through the tubular member and is axially supported by the inner holes of the left and right bearings is rotated by a fluid pressure cylinder. The left and right eccentric bearings connected by a connecting member are configured to rotate synchronously, and a rotating means connected to one of the left and right bearings for rotating the shaft by a handle operation is provided. .

[Action]

When the piston rod of the fluid pressure cylinder is moved back and forth, the shaft rotates in the inner hole of the bearing and the left and right eccentric bearings connected to this shaft by the connecting member rotate, and the impression cylinder is attached to and detached from the plate cylinder. . When the printing pressure adjusting means is operated by a handle at one location, the bearing rotates in the frame side shaft hole and the shaft rotatably supported by the inner hole moves in parallel due to the eccentric action. The eccentric bearing rotates in the same phase, and the impression cylinder moves in parallel to adjust the printing pressure.

〔Example〕

1 to 3 show an example in which a printing pressure adjusting device according to the present invention is applied to an intaglio printing machine. FIG. 1 is a side view thereof, FIG. 2 is a front view of a main portion, and FIG. 3 is a book. It is an outline side view of the intaglio printing machine which devised it. In the figure, between the paper feeding device 2 on which the paper 1 is stacked and the printing device 3 in front of the paper feeding device 2, the stacking mechanism of the paper feeding device 2 receives the papers 1 fed one by one from the upper layer, and aligns the printing registration. A difference plate 4 and a swing device 5 for swinging the paper 1 on the difference plate 4 are arranged. The printing unit 3 includes an impression cylinder in which three sets of gripper devices 8 (hereinafter, simply referred to as “claws 8”) including a claw 6 and a claw base 7 are arranged at positions circumferentially dividing the outer peripheral portion into three equal parts. 9, an intaglio cylinder 10 of approximately the same diameter, a transfer cylinder 11 of approximately 1/3 the diameter, and a discharge cylinder 12 are in contact with each other. Of these, the transfer cylinder 11 is provided with a pair of claws having the same structure as the claws 8 and is configured to cause the paper 1 that has been gripped by the swing device 5 to be gripped by the claws 8 of the impression cylinder 9. . Further, a pair of left and right paper ejection chains 13 is stretched between a sprocket coaxial with the paper ejection cylinder 12 and a sprocket (not shown). A paper ejection claw that is conveyed as the paper ejection chain 13 travels is provided. Further, on the peripheral surface of the intaglio cylinder 10, an intaglio formed by a flat surface as a non-image area and a recess as an image area is mounted. On the surface of the intaglio plate, a plurality of inking rollers 14 are contacted, and the fountain roller rotating in the ink fountain 15 is in contact therewith.
16 are facing each other. 17 is in contact with the fountain roller 16 and is an ink fountain
This is a shaking roller that evens out the ink flowing out from 15. Further, the intaglio cylinder 10 is in contact with a wiping roller 20 that rotates in the same direction as the intaglio cylinder in the cleaning liquid tank 19 in which the cleaning liquid 18 is stored, and the excess ink attached to the periphery of the pattern recess on the intaglio surface is The wiping roller 20 is rotated by pressing and the cleaning liquid 18 is used for cleaning.

The impression cylinder 9 of the intaglio printing press configured as outlined above is:
Both end shafts 9a are axially supported in an inner hole 23a of an eccentric bearing 23 that is rotatably supported in bearing holes of the operation side frame 21 and the drive side frame 22, respectively. The eccentric bearing 23 has an inner hole 23a. The shaft center F and the shaft center F ₁ of the outer periphery 23b that fits into the bearing holes of the frames 21 and 22 are eccentric as indicated by the symbol t in the figure.

Reference numeral 24 denotes a bearing as a whole, which is rotatably supported by the left and right frames 21 and 22, respectively, and a tubular member formed in a hollow shape that connects the bearings 25 and 26 inside the frames 21 and 22. In the bearing tube integrally formed with the flanged tube 27 as described above, the left and right bearings 25 and 26 have the shaft core F ₂ of the shaft support outer circumferences 25a and 26a and the inner holes 25b and 26b. The shaft center F ₃ and the axis F ₃ are eccentric as indicated by reference numeral t ₁ , and the inner hole 27a of the flanged tube 27 is formed to have a larger diameter than the inner holes 25b and 26b. The inner holes 25b, 26b of the left and right bearings 25, 26 have an inner hole 27 of the flanged pipe 27.
Both ends of a shaft 28 penetrating a are rotatably supported, and the protruding end of the shaft 28 from the operation side frame 21 is
Lever 29 is fixed. Reference numeral 30 denotes a hydraulic cylinder as a fluid pressure cylinder pivotally supported by the frame 21 via a bracket 31, and a working end of a piston rod 32 thereof is pivotally attached to one free end portion of a lever 29. The shaft 28 is configured to rotate in the forward direction and the reverse direction via the lever 29 by advancing and retracting the hydraulic pressure. Further, both ends of the lever 29 and the end surface of the eccentric bearing 23 are connected by an extendable turnback 33 which is pivotally attached to the lever 29 and the metal fitting 42, and the rotation of the shaft 28 causes the eccentric bearing 23 to rotate. Due to the eccentric action, the impression cylinder 9 is attached to and detached from the intaglio surface on the intaglio cylinder 10. The turn bag 33 is provided to correct the deviation of the left and right eccentric phase due to a processing error or an assembly error, and may be provided on only one side.

Inside the operation side frame 21, the stud 34
An operating shaft 36 having a knob 35 is rotatably and non-slidably inserted into the stud 34 via thrust bearings 37, 38. The tip screw portion of the operating shaft 36 is screwed into the screw hole of the rod 39 and is fixed by a fixing screw 40 after adjusting the forward / backward movement, and the other end of the rod 39 is attached to one bearing 25 of the bearing tube 24. It is pivotally attached to the formed lever portion 25c. Reference numeral 41 is a nut for absorbing the clutch. With this configuration, the knob 35
When the operating shaft 36 is rotated by gripping the rod 39, the rod 39 advances and retreats to rotate the bearing tube 24, and the eccentric action of the left and right bearings 25 and 26 causes the shaft 28 to move in parallel. 23 rotates synchronously by the same phase, the impression cylinder 9 moves in parallel, and the printing pressure on the intaglio surface is adjusted.

The operation of the intaglio printing press configured as described above will be described. The paper 1 sent out onto the slip plate 4 and gripped by the claws of the swing device 5 is replaced by the claws 8 of the impression cylinder 9, and is wound around the peripheral surface by the rotation of the impression cylinder 9 to form the intaglio cylinder 10. After passing through the space, the paper is held by the nails of the paper ejection chain 13 and conveyed and ejected. At this time, ink is supplied to the intaglio surface on the intaglio cylinder 10 by an inking device, and excess ink other than the pattern in this ink is wiped by the wiping roller.
It is wiped off with 20, and the pattern thus formed is transferred and printed on the paper 1 passing between the impression cylinder 9 and the intaglio cylinder 10. At the time of printing, the piston rod 32 of the hydraulic cylinder 30 is moved forward, and the eccentric bearing 23 is rotated counterclockwise in FIG. 1 through the lever 29 and the turn bag 33. The large printing pressure of the impression cylinder 9 acts.

When the printing operation is interrupted, the piston rod 32 of the hydraulic cylinder 30 is retracted at the same time as the feeding is stopped, and the eccentric bearing 23 is rotated in the clockwise direction in FIG. 1 via the lever 29 and the turn bag 33. The body 9 is separated from the intaglio surface and is in a detached state. When the operation is restarted, the piston rod 32 of the hydraulic cylinder 30 moves forward, and the impression cylinder 9 is pressed against the intaglio surface and put into the wearing state as in the previous case.

When the printing pressure of the impression cylinder 9 is adjusted prior to the printing operation or during the printing, when the knob 35 is gripped and the operation shaft 36 is rotated, the tip thereof is pivotally attached via the rod 39. The lever portion 25c swings, and the entire bearing tube 24 including the lever 25c as a constituent member rotates. As a result, the bearings on both ends of the bearing tube 24
Since 25 and 26 rotate integrally in the same phase at the same time and the shaft 28 moves in parallel due to the eccentric action, the lever 29 and the turn back 33
The left and right eccentric bearings 23 simultaneously rotate in the same phase via the, and the eccentric action causes the impression cylinder 9 to move in parallel to adjust the printing pressure.

[Effect of device]

As will be apparent from the above description, according to the present invention, in the printing pressure adjusting device for a sheet-fed printing press, the shaft holes of the left and right frames are provided with the shaft core of the outer periphery and the shaft center of the inner hole which are fitted into the shaft holes. The eccentric bearing is rotatably rotatably supported, the left and right bearings are connected by a tubular member, and the shaft pierced through the tubular member and rotatably supported by the inner holes of the left and right bearings is a fluid pressure cylinder. The left and right eccentric bearings that are connected to the shaft by a connecting member are configured to rotate synchronously by rotating the shaft with the shaft, and the shaft is connected to either one of the left and right bearings by operating the handle. By providing the rotating means for rotating, the attachment / detachment of the impression cylinder can be smoothly carried out as usual, and the eccentric bearings on both sides are synchronized via the tubular member for rotating the bearing by operating the operating means. Both ends of the impression cylinder There is no need to eccentrically twist each other, damage to bearings can be avoided and the durability of the device is improved, and the operation is light and the operability is improved. It will be possible to save labor. Further, since the shaft supported by the inner holes of the left and right bearings penetrates through the tubular member, space saving can be achieved and miniaturization can be achieved.

[Brief description of drawings]

1 to 3 show an embodiment of a printing pressure adjusting device of a sheet-fed printing press according to the present invention. FIG. 1 is a side view thereof, FIG. 2 is a front view of essential parts, and FIG. 3 is a book. It is an outline side view of the intaglio printing machine which devised it. 9 ... impression cylinder, 10 ... intaglio cylinder, 21,22 ... frame, 23 ...
… Eccentric bearing, 24 …… Bearing tube, 25,26 …… Bearing, 27 …… Tube with collar, 28 …… Shaft, 29 …… Lever, 30 …… Hydraulic cylinder, 32 …… Piston rod, 33 …… Turn batter, 35
…… Knob, 36 …… Screw shaft, 39 …… Rod, F ₂ …… Outer peripheral shaft center, F ₃ …… Inner hole shaft center, t ₁ …… Eccentric dimension.

Claims (1)

[Scope of utility model registration request] 1. A rotary printing method in which an eccentric bearing on a frame, which supports both end shafts of an impression cylinder, is rotated to attach / detach the impression cylinder to / from the plate cylinder and to adjust printing pressure to the impression cylinder. In a printing pressure adjusting device of a machine, bearings having eccentric eccentricity of an outer peripheral shaft center fitted to the left and right frame shafts and an inner hole shaft center are rotatably supported by the left and right shaft shafts. Bearings are connected by a tubular member, and a shaft penetrating through the tubular member and rotatably supported by the inner holes of the left and right bearings is rotated by a fluid pressure cylinder. A rotary printing device, which is configured to rotate the left and right eccentric bearings synchronously, and is provided with a rotating unit that is connected to one of the left and right bearings and that rotates the shaft by a handle operation. Printing pressure adjustment device.