JPS5871163A - Phase adjusting device of rotary sheet-fed press with reversing mechanism - Google Patents

Abstract

PURPOSE:To improve operability, by providing a plurality of gears which move the compression of a fixing gear and an adjusting gear to the releasing direction back and forth in order to adjust the phase between paper receiving and delivering cylinders in the rotary sheet-fed press, wherein the reversing mechanism for printing both sides of paper is provided. CONSTITUTION:When the rotary sheet-fed press is switched to double surface printing, locking of a fixed gear 12 by a fixing mechanism which is not shown and an adjusting gear 14 is released. Then a hexagon head 16b of a pinion gear 16 is rotated, four gears 22, which are engaged with the gear 16, are simultaneously rotated and pulled out of the thread part of the pins 20, and the pins 20 become freely movable slightly in the axial direction. Therefore the compression of the fixed gear 12 and the adjusting gear 14 is released. When the adjusting gear 14 is rotated, the phase between the fixed gear 12, which is fixed to the shaft end 11 of the reversing cylinder 2, and the adjusting gear 14 is adjusted. In this adjustment, since the position of the paper end is different depending on the size of the paper 5, the position is adjusted by aligning a pointer with a scale. Therefore, the paper 5, whose surface 5a is printed by a rubber cylinder 4 and an impression cylinder 1, is reversed by the reversing cylinder 2, and the back surface is printed by an impression cylinder 3 and the rubber cylinder 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for adjusting the phase between cylinders that transfer paper in a sheet-fed rotary printing press equipped with a paper reversing mechanism for double-sided printing.

In recent years, with the diversification of printing, sheet-fed rotary printing presses with a reversing mechanism that can be used for single-sided printing and double-sided printing have been developed and put into practical use. FIGS. 1 and 2 are side views of the vicinity of the reversing cylinder for explaining the paper delivery operation when one side is open and when double-sided printing is performed by this type of printing machine,
FIG. 1 shows the case of single-sided printing, and FIG. 2 shows the case of double-sided printing.

To explain this based on the figure, a reversing cylinder 2 is provided downstream of the impression cylinder 1 of the first printing unit.
An impression cylinder 3 of a second printing unit is provided on the downstream side of the printing unit. Then, the impression cylinder 1 and the blanket cylinder 4 of the first printing unit
The printed paper 5 is fed between the impression cylinder 3 and the blanket cylinder 6 of the second printing unit via the reversing cylinder 2 by changing the grip of the claw, and the next printing is applied. . Therefore, when comparing single-sided printing and double-sided printing, firstly, in the single-sided printing shown in FIG.
After the reversing cylinder 20 rotates approximately 1,800 revolutions, it is transferred to the reversing cylinder 20 and the reversing pawl 8, and then transferred to the pawl 9 of the impression cylinder 3 for the next printing. Similarly, the surface 5a of the paper 5 wound around the impression cylinder 3 is exposed upward, so that one side of the paper 5 is wound on the impression cylinder 3. On the other hand, in the case of double-sided printing shown in FIG. The paper is wrapped around the impression cylinder 1 past the point of contact with the cylinder 1, 2, and the tail of the paper
When the end of the paper reaches the contact point, the reversing claw 8 picks up the end of the paper. At this time, the claw T opens and releases the paper 5, so as the reversing cylinder 2 rotates, the paper 5 reaches the impression cylinder 3 with the front and back sides reversed, and the front surface 5a is turned down by the gripping of the claw. It is wrapped around the cylinder 3 and printed on the back side 5b, resulting in double-sided printing. In this case, unlike the single-sided case, the reversing claw 8 enters the paper 5 from the paper tail side, grips it, and releases the paper 5 after revolving together with the reversing cylinder 2, so the reversing claw 8 The opening/closing cam of the reversing claw 8 is provided with a cam surface for diversion to the nail skin so that it rotates approximately 180 degrees during revolution.

In the printing cylinder device equipped with a reversing mechanism that operates in this way, as is clear from a comparison of FIG. 1 and FIG.
The claw I and the reversing claw 8, which are facing each other in the figure, are the second
In the figure, the phase is shifted by the winding angle θ of the paper 5. Therefore, when switching from single-sided printing to double-sided printing or from double-sided printing to single-sided printing, the phase of the downstream side group including the reversing cylinder 2 and the upstream fil+ side group including the impression cylinder 1 It is necessary to shift the angle θ corresponding to the size of the paper 5. This phase adjustment must also be performed when the paper size changes during duplex printing.

Conventionally, the following types of devices have been used as this phase adjustment device. That is, two gears are provided on the reversing cylinder 2 that mesh with the gear on the impression cylinder 1 to transmit rotation, and these are installed adjacently, one gear is fixed to the reversing cylinder shaft, and the other gear is reversed. It is freely rotatable around the trunk axis. During operation, the 21VA gear is fixed to transmit the rotation of the pressure cylinder 11110, and for phase 3 adjustment, the two gears are unfixed and the idle gear is moved to the impression cylinder 1 side. After being rotated together with the group and positioned, the two gears are fixed and the rotation is transmitted.

However, the conventional phase adjustment device has four gears.
~ It is fixed with six bolts and a restraining plate, and each time the phase is adjusted, these are loosened and tightened to release and fix the gear, so it not only takes a long time to adjust, but also This method requires a large space for adjustment and has the drawbacks of extremely poor operability.

The present invention has been made in view of the above points, and a fixed gear that meshes with a gear on the downstream printing cylinder is fixed to the end shaft of the reversing cylinder whose surfaces are in contact with both adjacent printing cylinders. An adjustment gear that meshes with a gear on the upstream printing cylinder is loosely installed on the stepped part, and a threaded pinion gear that is screwed into the shaft end surface of the reversing cylinder so that it can move forward and backward, and a local part outside the end surface of the fixed gear. In the circumferential direction, a plurality of gears supported by threaded members are meshed with each other directly or through intermediate gears at equally divided locations, and by rotating the pinion gear, the gears are rotated and the screw is threaded. By configuring the fixed gear and the adjustment gear to be crimped and fixed via a member, it is possible to perform phase adjustment between the reversing cylinder and its upstream impression cylinder with a simple configuration and easy operation. The present invention provides a phase adjustment device for a sheet-fed rotary printing press with a reversing mechanism. Embodiments of the present invention will be described in detail below with reference to the drawings.

3 to 6 show an embodiment of the phase adjustment device according to the present invention, FIG. 3 is a sectional view thereof, FIG. 4 is a front view from A in FIG. 3, and FIG. BB sectional view, FIG. 6 is a sectional view of the phase adjustment operation section.

Regarding the cylinder arrangement around the reversing cylinder and the paper reversing operation, etc.
This will be explained using FIGS. 1 and 2. In these figures, blanket cylinders 4 and 6 as printing cylinders and impression cylinders 1 and 3 of double diameter thereof are pivotally supported on the left and right frames 10 of each adjacent printing unit, with their peripheral surfaces facing each other. Between both impression cylinders 1 and 3, a reversing cylinder 2 of the same double diameter is installed between each impression cylinder 1 and 3.
, 3 with their peripheral surfaces facing each other, and both impression cylinders 1
, 3, an inversion cylinder 2 is pivotally supported by a frame 10 with its peripheral surface facing each impression cylinder 1, 3. The outer circumferential notches of the impression cylinders 1 and 3 have a cam follower on the cylinder side facing a claw opening/closing cam fixed to the frame side at the end of the cylinder shaft, and the cylinders 1 and 3 rotate at a predetermined timing. Double fill that opens and closes
lil claws 7.9 are respectively provided. In addition, a notch on the outer periphery of the reversing cylinder 2 is provided with a claw opening/closing cam for single-sided printing or a claw opening/closing/reversing cam for double-sided printing, which is also fixed to the frame side at the end of the cylinder shaft. A plurality of reversing claws 8 are provided that open, close, and reverse by bringing the side cam followers into contact with each other.

An impression cylinder 3 on the FI& side is attached to the end shaft 11 of the reversing cylinder 2 that protrudes from the frame 10 on the side opposite to the drive side of the reversing claw 8 by the cam.
A fixed gear 12 meshing with a gear fixed to the shaft end of the
It is fixed by a fixed port 13, and a step 12a formed on the outer circumference of the fixed gear 12 has an annular adjustment gear 14 that meshes with a gear fixed to the shaft end of the impression cylinder 1 on the upstream side.
is rotatably fitted. The fixed gear 12 and the adjustment gear 14 are configured so that their mutual phases can be adjusted by a phase adjustment device, which will be described later, when switching between single-sided printing and double-sided printing. A fixing mechanism (not shown) fixes the gear 12 to the frame 10 so that it does not rotate, and a fixing mechanism (not shown) fixes the fixed gear 12 and the adjustment gear 14 when one side is opened.

Therefore, the configuration of the phase adjustment device will be explained. Fixed gear 12
A stepped gear hole 15 is bored in the center of the
A pinion gear 16 is rotatably supported in this gear hole 15 . This pinion gear 16 has a gear portion 16a.
It is integrally formed with an outer hexagonal head 16b and a pin 16C fitted into the gear hole 15, and by screwing a bolt 18 into the end face of the pin 16C through a washer 17, it can be attached to the fixed gear 12. It is rotatable and restricted from moving in the axial direction. Note that the gear portion 16a is provided with the fixed port 1.
3. A spanner hole 19 is provided for inserting a box spanner for attachment and detachment. On the other hand, pins 20 each having a hexagonal head are slidably but non-rotatably inserted into locations dividing the outer peripheral portion of the end surface of the fixed gear 12 into four equal parts in the circumferential direction.
A fan-shaped restraining plate 21 is inserted between the head and the ends of the fixed gear 12 and the adjusting gear 14, with its arc-shaped finished surface pressed against the end faces of both gears 12 and 14. ing. The protruding portion of each pin 20 from the fixed gear 12 is threaded, and a gear 22 that meshes with the pinion gear 16 is engaged with this threaded portion to rotate the pinion gear 16. As a result, the four gears 22 rotate synchronously, the pin 20 advances and retreats, and the fixed gear 12 and the adjustment gear 14 are crimped and fixed via the restraining plate 21.

Such a phase adjustment device is provided with an operating section, which is shown in FIG. In other words, both gears 1
A bearing 25 is provided diagonally below the frame 10 and supported by four stays 24, and the pole bearing 26 of this bearing 25 and the frame 1
A small gear 28 that meshes with the adjustment gear 14 and a gear shaft 29 are integrally formed and rotatably supported on the ball bearing 27 that is fitted into the ball bearing 27. Further, between the upper and lower stays 24, a handle il'J130 is rotatably supported by the frame 10, a bearing 25, and a bracket 31 fixed to the bearing 25.
The pinion 32 on the gear shaft 29 and the gear 33 on the gear shaft 29 are meshed with each other. A handle 34 is attached to the handle shaft 30, and two annular grooves 35 and 36 are provided, and together with a ball 38 biased by a spring 37, a click mechanism is formed. The movement of the pinion 30 is regulated by an engaged position and a non-engaged position of the pinion 32, which are shown by a solid line and a chain line in the figure.

By doing this, the pinion 32 and the gear 33 are engaged and the handle 34 is rotated, thereby adjusting the adjustment gear 1.
4 rotates to adjust the phase with the fixed gear 12. Note that the stepped end face of the fixed gear 12 and the corresponding adjustment gear 1
A pointer and scale plate (not shown) are provided on the end face of the paper 5 to display a phase adjustment device corresponding to the size of the paper 5.

The operation of the printing cylinder device and phase adjustment device configured as above will be explained. First, in the case of one side, the fixed gear 12 and the adjusting gear 14 are fixed in a predetermined phase by a fixing mechanism (not shown), and the gear 22 is closed and the adjusting gear 14 is fixed via the restraining plate 21. gear 12
It is crimped and fixed. In addition, the cam follower on the other end side of the reversing cylinder 2 corresponds to the claw opening/closing cam for single-sided printing, and the handle shaft 30 has been pulled out from the frame 10 and the pinion 32 and gear 33 are disengaged. There is. The handle shaft 30 is provided with a safety device such as a limit switch so that the machine will not start unless the handle shaft 30 is pulled out.

When the machine is operated in this state, as shown in FIG. The rubber cylinder 6 and the impression cylinder 3 are changed and wound around the reversing cylinder 2, and then changed between the reversing claws 8 and 9 and wound around the impression cylinder 3 with the surface 5a facing up.
Printing is performed on the surface 5a between the two sides, making it one-sided.

Next, when switching to the single-sided side, after releasing the fixation of both gears 12 and 14 by the fixing mechanism (not shown), apply a wrench to the hexagonal head 16b of the pinion gear 16 and rotate it.
The four gears 22 that mesh with this rotate simultaneously and the pin 2
The fixed gear 12 and the adjusting gear 14 are released from the fixed gear 12 and the adjusting gear 14 because the pin 20 becomes slightly movable in the axial direction. Therefore, after fixing the fixed gear 12 to the frame 10 side using a fixing mechanism (not shown) to prevent it from moving, the handle shaft 30 is pushed, and the pinion 32 and gear 33
When the handle 34 is rotated by engaging the pinion 32 and the gear 33. The adjustment gear 14 rotates due to the engagement between the small gear 28 and the adjustment gear 14, and the fixed gear 12 and adjustment gear 1 rotate.
4 is adjusted. When making this adjustment, please use 5 sheets of paper.
Since the position of the end of the paper differs depending on the size of the paper, the angle θ shown in FIG. After positioning in this way, when the pinion gear 16 is rotated in the opposite direction (11-), the gear 22 that meshes with it is tightened onto the pin 20, and both gears 12 and 14 are crimped and fixed via the holding plate 21. . Thereafter, the fixed gear 12 is released from the frame 1011tl, the handle shaft 30 is moved, and the pinion 32 and gear 33 are disengaged, thereby completing the phase adjustment.

When the machine is operated in this state, the impression cylinder 1
The upstream side group including the reversing cylinder 2 is out of phase with the side group including the reversing cylinder 2, and the cam floor on the other end side of the reversing cylinder 2 corresponds to the claw opening/closing/reversing cam for double-sided printing, so the rubber cylinder 4 and the impression cylinder 1, the paper 5 whose surface 5a is printed passes the point of contact between both sets 1 and 2 and is exposed to the impression cylinder 1 at an angle θ.
The end of the paper is caught by the reversing claw 8 at this position. When the side group further rotates, the paper 5 is
is reversed so that it is inside, and then reaches the point of contact with the impression cylinder 3 and is gripped by the claw 9 of the impression cylinder 3, so that the back side is facing up, and the back side is moved between the impression cylinder 3 and the blanket cylinder 6. It is printed on both sides.

7 and 8 show other embodiments of the present invention, and FIG. 7 is a developed cross-sectional view corresponding to FIG.
FIG. 8 is a front view corresponding to FIG. 4. In this embodiment, the pinion gear 16A has a smaller diameter than the pinion gear 16 of the previous embodiment, and the pinion gear 16A and the two gears are arranged between the pinion gear 16A and the four gears 22A on the pin 20. Two intermediate gears 39 are provided which mesh with each gear 22A. The rest is the same as the previous embodiment. By doing this, the pinion gear 16A
The rotation is transmitted to the gear 22A via the intermediate gear 39 to perform phase adjustment. If the thread direction is the same, both gears 1
It goes without saying that the direction of rotation of the pinion gear 160 when crimping 2.14 is the opposite direction.

FIG. 9 is a cross-sectional view of a crimped portion between a fixed gear and an adjusting gear showing another embodiment of the present invention. In this embodiment, unlike each of the above embodiments, the fixed gear 12A is
An adjustment gear 14A is provided in the step part formed on the outside of the adjustment gear 14A.

The planetary gear 22B, which meshes with the pinion gear of the reversing cylinder shaft core, is supported by a bolt 40 that is screwed into the end face of the fixed gear 12A so that it can move forward and backward. That is, the hexagonal hole 41 provided in the gear 22B engages with the hexagonal head 42 provided in the bolt 40, and the gear 22B and the adjustment gear 1
A presser plate 43 is inserted between 4A and 4A. In addition, the gear 22B is a bolt 40 made up of a threaded bolt 44 and a washer 45.
is prevented from escaping. The rest is the same as each of the above embodiments.

By doing so, when the gear 22B is rotated by the rotation of the pinion gear 16, the bolt 40, which is engaged with the gear 22B at the hexagonal head 42, rotates and moves forward and backward with respect to the fixed gear 12A, and the presser plate 43 Adjustment gear 1 to fixed gear 12A via
4A crimp fixation is applied once.

The order of assembling the device shown in each of the above embodiments is to first tighten the gears 22, 22A, and 22B to a predetermined torque using a torque wrench, and then tighten the shaft without rotating the pinion gear 16 or the intermediate gear 39. Move it in the direction to engage it and tighten the nut on the back side to prevent it from coming off. Each gear 16
, 39.22, the effect on the crimp fixation of both gears 12.14 can be almost ignored.

As is clear from the above description, according to the present invention, in a phase adjustment device for a sheet-fed rotary printing press with a reversing mechanism, a downstream side is connected to an end shaft of a reversing cylinder whose surfaces are in contact with both adjacent printing cylinders. A fixed gear that meshes with the printing cylinder is fixed, and an adjustment gear that meshes with the gear on the upstream printing cylinder is loosely mounted on the outer peripheral step of the fixed gear, and a screw is screwed into the shaft end surface of the reversing cylinder so that it can move forward and backward. A pinion gear with a fixed gear and a plurality of gears supported in a planetary manner by screw members on the outer periphery of the end face of a fixed gear are meshed directly or through an intermediate gear, and the gears are rotated by rotating the pinion gear. By configuring the fixed gear and the adjustment gear to be crimped and fixed together and disconnected through a screw member, the group on the downstream side including the reversing cylinder and the upstream side including the printing cylinder on the upstream side thereof. The phase with the group can be adjusted extremely easily and in a short time by concentrated operation from the axis of the reversing cylinder, significantly improving operability and productivity, and reducing the operating space and making the machine more compact. 15= It can be configured as follows.

[Brief explanation of drawings]

Figures 1 and 2 are side views of the vicinity of the reversing cylinder in a sheet-fed rotary printing press with a reversing mechanism, and Figures 3 to 2 are side views of the vicinity of the reversing cylinder in a sheet-fed rotary printing press with a reversing mechanism, which compares and explains the paper gripping operation in single-sided printing and double-sided printing. FIG. 9 shows an embodiment of the phase adjustment device for a sheet-fed rotary printing press with a reversing mechanism according to the present invention, FIG. 3 is a sectional view thereof, FIG. 4 is a front view from A in FIG. 3, and FIG. FIG. 3 is a sectional view taken along line BB, FIG. 6 is a sectional view of the phase adjustment operation section, and FIGS. 7 and 8 show other embodiments of the present invention, and FIG. 7 corresponds to FIG. 3. FIG. 8 is a front view corresponding to FIG. 4, and FIG. 9 is a cross-sectional view of a crimped portion between a fixed gear and an adjusting gear showing another embodiment of the present invention. 1.3...Impression cylinder, 2...Reversing cylinder, 5...
Paper, 12, 12A...fixed gear, 12a...step, 14.14A...adjustment gear, 16...pinion gear, 2o...pin, 22.22A, 22B・
... Gear, 39 ... Middle 16-way gear, 40 ... Bolt. Patent applicant: Komori Printing Machinery Co., Ltd. Agent: Masaki Yamakawa (and one other person) 1. Case description: 1982 Patent Application No. 170279 2. Name of the invention: Phase adjustment of sheet-fed rotary printing press with reversing mechanism Apparatus 3, Relationship with the person making the amendment J+° Patent Applicant name (name) Komori Printing Machinery Co., Ltd. Number of inventions increased by the amendment... (1) Page 4, line 7 and the specification “Angle θ” in line 11
is corrected as "the angle θ and the 80 rotation angle α of the reversing claw". (2) Figures 1 and 2 should be corrected as shown in the attached sheet. Above 2-Nri 1

Claims (1)

[Claims] In a sheet-fed rotary printing press with a reversing mechanism in which paper is reversed between the two printing cylinders by a reversing cylinder whose circumferential surface is in contact with both adjacent printing cylinders, the sheet-fed rotary printing press is fixed to an end shaft of the reversing cylinder and is located on the downstream side. a fixed gear that meshes with a gear on the printing cylinder; an adjustment gear that is loosely installed in a stepped portion adjacent to the fixed gear and meshes with a gear on the upstream printing cylinder; and a shaft end surface of the reversing cylinder. a threaded pinion gear that is screwed into the fixed gear so that it can move forward and backward, and a threaded pinion gear that is rotatably supported by a screw member at a location that divides the outer periphery of the end face of the fixed gear almost equally in the circumferential direction, and that is directly connected to the pinion gear or an intermediate gear. A plurality of gears are provided, which are gears that mesh through the screw member, and whose rotation moves the adjusting gear forward and backward through the screw member in a direction in which the adjustment gear is crimped and fixed to the fixed gear and in a direction in which it is released from the crimping. A phase adjustment device for a sheet-fed rotary printing press with a reversing mechanism.