JPH0524362U - Keyless inking device for rotary printing press - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention provides a simplified mechanism in which the nip pressure between the ink source roller and the delivery roller can be adjusted during operation, and the delivery roller of the ink source roller can be attached and detached. To do. [Structure] A structure is provided in which a delivery roller is rotatably supported by a bracket mounted from a doctor roller bearing, and the bracket is rotated about the doctor roller, and the delivery roller is attachable to and detachable from an ink source roller. In addition, a water content sensor for detecting the water content in the ink, and a controller for function-controlling the water content and the proper roller nip are provided, and the output of the controller is electropneumatically converted to change the air pressure of the air cylinder. A keyless inking device for a rotary printing machine, which is automatically adjusted to change the roller nip between the delivery roller and the ink source roller.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a keyless inking device for a rotary printing press, and more particularly to a detaching mechanism for a delivery roller and an ink source roller.

[0002]

[Prior Art]

 FIG. 6 shows an example of roller arrangement of a keyless inking device used in a conventional rotary printing press. In the figure, 1 is an ink tank, 2 is a pump, 3 is an ink source roller, 4 is a delivery roller, 5 is a doctor roller, 6 and 13 are inking rollers, 7 is a plate cylinder, 8 is a dampening water tank, and 9 is Water source roller, 10 is a brush roller, 11 is a water reciprocating roller, 12 is a swimsuit roller, and 14 is a doctor blade. The ink in the ink tank 1 is supplied to the plate cylinder 7 by a pump 2 through a discharge nozzle → ink source roller 3 → delivery roller 4 → doctor roller 5 → inking rollers 6 and 13. On the other hand, the dampening water in the water tank 8 is supplied to the plate cylinder 7 through the water source roller 9, the brush roller 10, the water reciprocating roller 11 and the swimsuit roller 12.

In order to transfer the ink and the dampening water from the roller to the roller, it is necessary to apply a contact pressure between the rollers which are in contact with each other and adjust the contact pressure depending on the transferability of the ink. It is also necessary to be able to visually confirm this contact pressure. Therefore, in order to check the contact pressure, that is, the contact width, between the ink source roller 3 that rotates at an ultra-low speed independently and the delivery roller 4 that rotates at a high speed driven by a rotary press, the delivery roller 4 is inked. The contact marks left on the outer peripheral surface of the delivery roller 4 are seen to escape from the original roller 3.

A side view and a front view of a conventional escape device for the delivery roller 4 are shown in FIGS. Reference numeral 15 is a shaft fixedly contacted with the driving side frame and the operation side frame, and 16 is an adjustment having a screw portion 16a which is rotatably fitted on the shaft 15 and which adjusts the contact pressure between the ink source roller 3 and the delivery roller 4. A device, 17 is a lever screwed to the screw portion 16a, 18 is a plate provided inside the driving and operating frames, 19 is a shaft attached to the plate 18, and 20 is an air attached to the plate 18. Cylinders, 22 and 23 are levers fixed to both ends of the shaft 21 and the inside of the plate 18, 24 is a link, 25 is an eccentric bush that supports both shaft ends of the ink source roller 3, and a lever portion that is connected to the link 24. 25a.

Next, when the adjusting portion 16b of the adjusting device 16 is rotated, the screw portion 16a is rotated, and the plate 18 is slightly rotated by the movement of the lever 17 which is screwed onto the screw portion 16a, so that the doctor roller 5 and the delivery roller 4 are rotated. The abutting pressure can be changed. The eccentric bush 26 of the delivery roller 4 and the adjusting device 27 are members that adjust the contact pressure between the delivery roller 4 and the ink source roller 3.

When the air cylinder 20 is operated in this adjusted state, the eccentric bush 25 is rotated via the lever 22, the shaft 21, the lever 23 and the link 24, and the delivery roller 4 is moved from the ink source roller 3 It can be detached and attached.

[0007]

[Problems to be solved by the device]

 In the keyless inking device, after the ink and the dampening water are transferred to the image area and the non-image area of the plate of the plate cylinder, respectively, the ink and the dampening water remaining on the inking rollers 6 and 13 (Ink) goes up the history route (route on the side opposite to the ink supply route shown by the arrow) and the portion having the history is scraped off by the doctor blade 14 on the doctor roller 5, but at this time, the water-containing ink is transferred to the ink tank 1. Will be returned. The water content of the ink supplied from the pump 2 onto the ink source roller 3 is increased (fluctuated) by this scraped ink, and the transferability of the ink between the ink source roller 3 and the delivery roller 4 is varied. , The concentration may change.

In the conventional delivery roller attaching / detaching device, the nip pressure is manually adjusted by rotating the adjusting portion 16b, so that the device side must be approached, and the adjustment during operation may be dangerous. , The rotary printing machine was stopped. In addition, this delivery roller attachment / detachment device had a large number of parts and had a complicated mechanism, which required a sufficient time for assembly.

It is an object of the present invention to provide a simplified mechanism capable of adjusting the nip pressure between the ink source roller and the delivery roller during operation, and detaching the delivery roller from the ink source roller. To do.

[0010]

[Means for Solving the Problems]

 (1) The delivery roller is attached to a bracket that rotates around the axis of the doctor roller, and this bracket is rotated by an air cylinder and a link mechanism so that the delivery roller can be attached to and detached from the ink source roller. (2) The nip pressure between the ink source roller and the delivery roller is adjusted by adjusting the pressure of the air cylinder. (3) The water content of the ink is detected by the water content sensor, and the controller controls the water content and the proper roller nip as a function, which is electropneumatically converted to adjust the air pressure of the air cylinder. This is done in response to changes in water content of.

[0011]

[Action]

 (1) With the air cylinder, the bracket that supports the delivery roller 4 largely rotates around the outer diameter of the eccentric bush that supports the doctor roller, so that the delivery roller can be detached from the ink source roller and detached. (2) Since the pressure of the air cylinder is adjusted by the pressure adjustment valve that can adjust the pressure, the nip pressure between the delivery roller and the ink source roller can be adjusted by remote control. (3) The change in the water content of the ink measured by the water content sensor is automatically converted into the air pressure fluctuation in the air cylinder, so that the nick between the ink source roller and the delivery roller can be adjusted properly, and the stability is stable. Ink transfer is possible.

[0012]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. In the figure, 1 is an ink tank, 2 is a pump, 3 is an ink source roller, 4 is a delivery roller, 5 is a doctor roller, 31 is a shaft mounted on a bracket 35 described later, 32 is an air cylinder, and a lever 38 is used. It is connected to the shaft 31 and to the bracket 34 by the shaft 33. Reference numeral 35 denotes a bracket, which includes a portion 35b that supports the doctor roller 5 via an eccentric bush 36 and a bracket 35a that rotatably supports the delivery roller 4. 36 is an eccentric bush, 37 is a guide, 41 is a pressure regulating valve or electropneumatic converter, 42 is a 4-pass two-stage switching solenoid valve, and 43 is a check valve. Accordingly, when the air cylinder 32 operates in the relief direction shown by the broken line in FIG. 1 by the operation of the solenoid valve 42, the bracket 35 rotates counterclockwise (broken line) by the lever 38, and the delivery roller 4 causes the delivery roller 4 to move. Move away. Further, when the pressure adjusted by the pressure adjusting valve 41 acts in the solid line direction on the air cylinder 32 by the switching operation of the solenoid valve 42, the nip pressure between the ink source roller 3 and the delivery roller 4 changes.

The eccentric bush 36 is a member that adjusts the nip pressure between the delivery roller 4 and the doctor roller 5. FIG. 3 diagrammatically shows a circuit for automatically adjusting the air pressure in the air cylinder 32. The water content of the ink (water content) pumped from the ink tank 1 by the pump 2 is detected by the water content sensor 39 installed in the middle of the pipe, and the water content is input to the control device 40. Since the control device 40 stores a relationship graph (not shown) between the water content and the air pressure at which proper ink transfer is possible, the control device 40 determines the water content detected by the water content sensor 39. The corresponding air pressure is commanded to the electropneumatic converter 41. By this command, the electropneumatic converter 41 can supply the air pressure to the air cylinder 32 so that proper ink transfer is performed.

[0014]

[Effect of the device]

 A keyless inking device of a rotary printing press according to the present invention includes a delivery roller rotatably supported on a bracket mounted from a bearing for a doctor roller, and an air cylinder for rotating the bracket around the doctor roller. The roller has a structure that can be attached to and detached from the ink source roller, and a water content sensor for detecting the water content in the ink and a controller for function control of the water content and the proper roller nip are provided. The following effects can be obtained by performing air conversion, automatically adjusting the air pressure of the air cylinder, and changing the roller nip between the delivery roller and the ink source roller.

The delivery roller can be separated from the ink source roller by remote automatic operation. In addition, by controlling the water content and the appropriate roller nip with a water content sensor, control device, and electropneumatic converter, the air pressure of the air cylinder can be automatically adjusted in response to changes in the ink water content. The nip pressure between the ink source roller and the delivery roller can be changed, enabling stable ink transfer.

Since the delivery roller attaching / detaching device has a simple mechanism as described above, the number of parts is reduced and the assembling becomes easy.

[Brief description of drawings]

FIG. 1 is a side view showing an essential part of an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a schematic diagram of an air pressure automatic adjustment circuit according to an embodiment of the present invention.

FIG. 4 is a side view of a conventional delivery roller releasing device.

FIG. 5 is a front view of FIG.

FIG. 6 is a roller layout view of the keyless inking device.

[Explanation of symbols]

 3 Ink Source Roller 4 Delivery Roller 5 Doctor Roller 32 Air Cylinder 35 Bracket 39 Moisture Content Sensor 40 Controller 41 Electropneumatic Converter

Claims (1)

[Scope of utility model registration request] 1. An air cylinder for rotatably supporting a delivery roller on a bracket mounted from a bearing for a doctor roller, and rotating the bracket around the doctor roller, the delivery roller being detachable from an ink source roller. In addition, a water content sensor for detecting the water content in the ink and a control device for function control of the water content and the proper roller nip are provided, and the output of the control device is electropneumatically converted to the air of the air cylinder. Automatically adjust the pressure,
A keyless inking device for a rotary printing press, wherein the roller nip between the delivery roller and the ink source roller is changed.