JPS63173644A - Phase switching device for reversing cylinder in sheet-fed press for both one-side printing and perfecting - Google Patents

Abstract

PURPOSE:To enable phase switching, simplify the construction and ensure adaptability for remote control or automatic control, by introducing a fluid pressure into a gap between a short stroke cylinder and a piston to release the pressed engagement of a gear and a ring gear. CONSTITUTION:A fluid pressure is introduced into a gap between a short stroke cylinder 7 and a piston 20 to release the pressed engagement of a gear 2 and a ring gear 3, against an energizing force of a belleville spring 12. With this construction, remote or automatic control of phase switching can be performed, the phase switching can be performed without making the operator's hands smeared, and troubles due to power interruption can be prevented by clamping the ring gear 3 by the belleville spring 12 during the operation. In addition, since each of a shaft end rod 5, the belleville spring 12, the short stroke cylinder 7 and the piston 20 is singular in number, construction is simplified, no unbalanced load is generated, and the gears 2, 3 are connected in a body. Further, the adaptability for remote control or automatic control is secured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a phase switching device for a reversing cylinder of a single-sided/double-sided sheet-fed printing press.

[Conventional technology and its problems]

As is well known, multi-color sheet-fed printing presses include both single-sided and double-sided sheet-fed printing presses, and there are various switching methods depending on the type of printing press. For example, in a unit type two-color offset printing press, There is a phase switching device that switches from single-sided printing to double-sided printing and from double-sided printing to single-sided printing by adjusting the phase of the reversing intermediate cylinder.

In other words, it is necessary to shift the timing between the two printing units depending on whether printing is performed on one side or both sides of the printing paper. This is done by switching the phase of a ring gear that is rotatably fitted onto the outer peripheral edge of the ring gear. ' Conventionally, a typical example of such a phase switching device uses six clamp plates to maintain the phase of a gear fixed to the shaft end of the intermediate reversing cylinder and a ring gear fitted to the outer peripheral end of the gear. Tightening of bolts was done by force. Therefore, if it was necessary to change the gear phase, it was necessary to loosen these six bolts using a tool, turn the gear, set it to the desired phase, and then tighten the bolts again. At this time, if the tightening force of the bolt is insufficient, the gear may slip and rotate, causing damage to the machine.
Another problem is that adjustment time is required for phase switching.

Therefore, in order to solve this problem,
Publication No. 1162 makes the following proposal. That is, one end of a plurality of radial levers is engaged with one adjustment bolt (corresponding to the six bolts described above) at the shaft end of the intermediate reversing cylinder to which the gear is fixed, and the other end of the lever is inserted into the pin hole of the gear and engaged with the pin which is biased by a disc spring, and the lever is swung by advancing and retreating the adjustment bolt, causing the pin to slide in the pin hole. In this paper, a device is proposed that switches the phase by connecting and disconnecting the crimp between a gear and a ring gear.

However, in such a proposal, a plurality of levers are provided, and each lever has a pinion and an I spring, making the structure complicated. Furthermore, each lever and a plurality of pins with disc springs interposed are distributed. Due to the structure, the spring load is dispersed, resulting in an uneven load, and the pressing force is not uniform, and the frictional force is not uniform between the gear and ring gear, resulting in slippage. There is a risk that this may occur. Furthermore, the number of parts increases, resulting in higher costs and problems with maintenance reliability.

Further, Japanese Utility Model Application Publication No. 61-85436 proposes the following. That is, one end of a plurality of radial levers is brought into contact with a flange on the shaft end of the intermediate reversing cylinder to which the gear is fixed, and the other end of the lever is brought into contact with the side surface of the ring gear, thereby rotating the ring gear. is crimped to the gear, the intermediate part of the lever is pivoted on the side of the gear, and is biased by a spring on the axis side of the pivot point, and the flange is advanced and retreated by an appropriate automatic release means. has proposed a phase switching device that connects and disconnects the crimp connection between a gear and a ring gear.

However, in this proposal, the structure is still complicated because multiple levers are provided, and each lever requires a pivot and a spring. Therefore, the flange is retracted and the ring gear and gear If it is attempted to provide an automatic release means for releasing the crimping, it lacks reliability against failure, and furthermore, since a plurality of springs are interposed, the structure is complicated and there is a problem of uneven load.

[Means for solving problems]

Therefore, the present invention was created with a focus on completely solving the problems of the prior art described above, and includes a gear fixed to the shaft end of the intermediate reversing cylinder, It is equipped with a ring gear rotatably fitted, and a one-sided
In a phase switching device for a reversing cylinder of a double-sided sheet-fed printing press, a disc spring is fitted into a shaft end rod protruding from the surface of the shaft end, and a disc spring is fitted into the shaft end rond. a short stroke cylinder that presses the ring gear at its outer peripheral end; a piston that is fitted into the shaft end rod, fits within a recess on the axis side of the short stroke cylinder, and slides within the recess; a reversing cylinder of a sheet-fed printing press for single-sided and double-sided printing, characterized in that the pressure between the gear and the ring gear is released by fluid pressure introduced between the short stroke cylinder and the piston; An object of the present invention is to provide a phase switching device.

[Operation] When switching the phase, fluid pressure (hydraulic or pneumatic pressure) is introduced between the piston and the recess formed on the axis side of the short stroke cylinder to bias the disc spring. 0, which releases the crimp between the gear and ring gear and adjusts the phase.
Next, when the phase adjustment is completed, fluid pressure is released and the recess and piston are brought closer to each other by the bias of the blood spring, and the gear and ring gear are pressed together, allowing switching between single-sided and double-sided printing.

〔Example〕

The configuration of the present invention will be explained in detail with reference to embodiments shown in the drawings.

In FIG. 1, a ring gear 3 rotatably fitted to the outer peripheral end of the gear 2 is fixed to the shaft end 1 of the intermediate reversing cylinder, and the thrust bearing is configured to move in the axial direction with a washer 4. The axial position is regulated by providing a very small gap δ, so that the ring gear 3 can rotate smoothly. Therefore, in this thrust receiver, the washer 4 and the bolt 16
It is fixed to the outer surface of gear 2.

In order to fix the gear 2 to the shaft end 1, a key is fitted, and the threaded part 5a of the shaft end loft 5 is screwed into the outer end surface of the shaft end 1, and the flange part 5b prevents the gear 2 from being removed. is prevented. Further, a rotating soil pin 6 is interposed between the flange portion 5b and the surface of the shaft end portion 1. A piston 20 having an angular cross section is fitted into the guide rod-shaped portion 5c of the shaft end loft 5, and a recess 7a formed on the axis side of the short stroke cylinder 7, which guides the outer diameter of the piston 20, is inserted into the piston 20. By extrapolation, a hydraulic cylinder A with a stroke of approximately 3fi is constructed. The outer peripheral end 7b of the short stroke cylinder 7 is brought into contact with the side surface of the ring gear 3, and the ring gear 3 is pressed against the gear 2. A spring receiver 11 having an angular cross-section is provided on the outside of the piston 20 in the guide rod-shaped portion 5c of the shaft end rod 5.
and insert the disc spring 12 into the cylindrical part 11a of the spring receiver 11.
A spring retainer 13 is inserted into the outer end of the spring retainer 13. On the outer side of the spring presser 13, a nuff 4 is screwed into a threaded part 5d carved at the tip of the guide rod-shaped part 5c. A rotary joint 15 is screwed into the end face of the threaded portion 5d, and the rotary joint 15 receives the hydraulic pressure that feeds the oil hole 18 drilled to supply hydraulic pressure to the hydraulic cylinder A.
7 (see FIG. 3) is provided so that it can be supplied even during rotation.

Next, FIG. 2 shows a pneumatic-hydraulic circuit for remotely or automatically operating the phase switching device. In the figure, 30 is a hydraulic miniature solenoid valve, 31 is an air-hydraulic conversion pressure booster, 32 is an air solenoid valve, 33 is an air 3-point centrifuge, 34 is a compressor, and 35 is a branch path to the hydraulic position of the pond.

Further, a clamping device for switching the phase of the reversing intermediate cylinder 37 is shown in FIG. A motor 42 performs phase switching drive, and 43 indicates a feed cylinder.
P, B, I are the first color printing units, P', B',
B indicates the second color printing unit.

Since the present embodiment has the above configuration, the following operation is performed, that is, the phase switching between the printing units is performed by the printing units P, B, I for the first color and the printing unit P' for the second color.
, B', and I', the phases of gear 2 and ring gear 3 shown in FIG. 1 are shifted so that a predetermined timing can be obtained. By energizing the air-hydraulic conversion pressure intensifier 31
At the same time, the hydraulic miniature solenoid valve 30 is energized to supply hydraulic pressure at a predetermined pressure to the hydraulic cylinder A from the axis of the shaft end rod 5 via the rotary joint 15. At this time, the piston 20 is brought into close contact with the flange portion 5b of the shaft end rod 5 due to hydraulic pressure and its movement is restricted, so the short stroke cylinder 7 moves by compressing the disc spring 12 via the spring receiver 11, so that the piston 20 is not moved. A gap of approximately 3fi is created between the gear and gear 3. As a result, the ring gear 3 is released from the clamped state by the short stroke cylinder 7 and the gear 2, and can freely rotate. In this state, by driving the phase adjustment motor 42 shown in FIG. 3, the drive gears of each of the first color printing units P, B, and I are rotated. At this time, the second color printing units P', B', I
' The drive gear (not shown) does not rotate because the ring gear 3 of the phase switching device of the reversing intermediate cylinder 37 slips and does not transmit torque.
The timing (phase) between color printing units P', B', I' can be varied. In this way, the first
After the phases of gear 2 and ring gear 3 shown in the figure are positioned at predetermined positions, the hydraulic pressure is eliminated by de-energizing each solenoid valve 30, 32 shown in FIG. The ring gear 3 is clamped again by the spring force of 12, making it possible to transmit torque to the second color printing units P', B'', and I', and switching between single-sided and double-sided printing is possible.

Note that the shaft end rod 5 may extend the shaft end l of the intermediate reversing cylinder 37.

In summary, the present invention has the following effects by adopting the configuration described in the claims.

〔Effect of the invention〕

Since fluid pressure is introduced between the short stroke cylinder and the piston to release the crimp between the gear and ring gear against the bias of the spring, remote or automatic phase switching is possible, and therefore the tool without using
Not only can the phase be changed without getting the operator's hands dirty, but the ring gear is clamped with a disc spring during operation.
Trouble caused by power outages can be prevented, and in addition, the shaft end rod,
Since there is only one disc spring, one short stroke cylinder, and one piston, the structure is simplified, no uneven load occurs, the gear and ring gear are reliably integrated by friction, and there are fewer failures. and may be suitable for remote or automated operation.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a pneumatic-hydraulic circuit diagram attached to the phase switching device of FIG. 1, and FIG. 3 is a drive device attached to the phase switching device of FIG. 1. . l... Shaft end, 2... Gear, 3... Ring gear, 5... Shaft end rod, 7... Short stroke cylinder, 7a... Recess, 7b... Outer peripheral end, 12...
Belleville spring, 20... Piston, 37... Reversing intermediate body.

Claims (1)

[Scope of Claims] A gear that is fixed to the shaft end of the intermediate reversing cylinder, and a ring gear that is rotatably fitted to the outer peripheral end of the gear,
In a phase switching device for a reversing cylinder of a single-sided/double-sided printing press that switches the phase by connecting/disconnecting the crimping between the gear and the ring gear, the gear is fitted into a shaft end rod protruding from the surface of the shaft end. a short stroke cylinder that is fitted into the shaft end rod and presses the ring gear at its outer peripheral end with the disk spring; a piston that fits within a recess of the cylinder and slides within the recess; the pressure between the gear and the ring gear is released by fluid pressure introduced between the short stroke cylinder and the piston. Phase switching device for reversing cylinder of single-sided/double-sided sheet-fed printing presses.