JPH0411809Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a plate cylinder attachment/detachment device for a rotary mimeograph machine, which allows the plate cylinder around which plate-making paper is wound to be easily attached and detached.

[Conventional technology]

FIG. 11 is a sectional view showing a schematic configuration of a rotary copying machine, in which printing paper 2 stacked on an elevator tray 1 is guided one by one by guide members 4 and 5 by the rotation of a paper feed roller 3. The paper is sent between the upper and lower rollers 6 and 7, and is fed to the rolling contact portion of the plate cylinder 8 and press roller 9 by the upper and lower rollers 6 and 7, and is printed by the rotation of the plate cylinder 8 on which the plate base paper a is wound. is now being carried out.

In such a rotary mimeograph press, during normal printing when the plate cylinder 8 contains an appropriate amount of ink, the plate cylinder 8
Due to the centrifugal force caused by the rotation of the plate cylinder 8 and the capillary phenomenon caused by the screen mesh on the outer periphery of the plate cylinder, the required amount of ink is drawn out from the holes in the plate base paper a and transferred to the printing paper. When the amount of ink runs low, it becomes difficult for the ink to come out evenly, making it more likely that printing will become blurry or uneven ink will occur when too much ink comes out and smudges.

Therefore, conventionally, even when the ink in the plate cylinder 8 is running low, a plate cylinder center shaft that is rotated by external operation is installed inside the plate cylinder 8 so as to be able to print as beautifully as normal printing. An inking roller is installed parallel to the plate cylinder center axis, which is brought into contact with and separated from the inner circumferential surface of the plate cylinder by rotating the plate cylinder center axis. It can be forcibly pushed out.

[Problem that the invention attempts to solve]

The plate cylinder 8 with a built-in inking roller as described above needs to be removed in the event that the inking roller device breaks down or the plate cylinder screen becomes clogged. In the turning machine, the plate cylinder 8 is rotated by a support shaft connected to the plate cylinder center shaft and a drive shaft that rotates the plate cylinder 8.
Since the plate cylinder 8 is supported on the machine frame, it is difficult to attach and detach the plate cylinder 8, and when the support shaft is removed, the plate cylinder 8 falls, causing damage to the screen mesh section, etc. Ta.

This invention was made in order to solve the above-mentioned conventional problems, and its purpose was to make it possible to easily and safely attach and detach the plate cylinder while making it possible to adjust the position of the inking roller. The goal is to provide equipment.

[Means for solving problems]

In order to solve the above-mentioned conventional problems, the plate cylinder attachment/detachment device of the present invention has an outer peripheral opening type bearing part 27 that receives the central boss part 10 of one end of the plate cylinder 8 from above at the inner end.
and a pin engaging portion 28 for receiving and engaging the protruding pin 12 at one end of the plate cylinder 8, and one side frame 29 of the machine body.
A cylindrical plate cylinder support shaft 25, which is rotatably supported on the plate cylinder 8 so as to rotate around a horizontal axis, and a center boss part 11 and a protruding pin 13 at the other end of the plate cylinder 8 are moved by pushing in the axial direction. a rotationally driven plate cylinder rotary disk 21 which has a recessed bearing portion 22 and a pin engagement portion 23 to be fitted therein, and is pivotally supported by the other side frame 24 portion of the body so as to rotate around a horizontal axis; , is inserted into the inner hole 10a of the central boss portion 10 at one end of the plate cylinder 8, and the plate cylinder center shaft 1
The spring 3 has an inner end shaft portion 32 that is recessed and recessedly engaged with one end shaft portion of the plate cylinder center shaft 14 in a removable manner.
4, the handle operating shaft 31 is fitted into the plate cylinder support shaft 25 so as to be movable and rotatable, and the inner end shaft portion 32 is moved by pulling the handle 36 onto the handle operating shaft 31. a lockable shaft movement locking means 40 that locks the inward movement of the handle operating shaft 31 when the handle operating shaft 31 is moved to the draw-out limit position where the handle operating shaft 31 is removed from the central boss inner hole 10a at one end of the plate cylinder 8; , inking roller 1 inside the plate cylinder 8
In order to adjust the position of the plate cylinder 8 in stages from the outside of the plate cylinder 8, the handle operating shaft 31 is rotated and latched in stages with the inner end shaft portion 32 engaged with the plate cylinder center shaft 14 in a concave and convex manner. The shaft rotation locking means 45 and the home position in which the inner end bearing opening 26 of the plate cylinder support shaft 31 faces upward are detected, and based on this detection signal, the rotational drive system of the plate cylinder 8 is rotated to the bearing position. Opening 26
The apparatus is characterized by comprising a position detecting means 60 for controlling the printer to stop at the home position when printing is stopped.

[Effect]

According to the above solution, the position detecting means 60 detects the home position in which the inner end bearing opening 26 of the plate cylinder support shaft 31 is facing upward, and when printing is stopped, the plate cylinder supporting shaft 31 is in the position where the bearing opening is facing upward. It will always stop at the home position. When adjusting the position of the inking roller 18 in the plate cylinder 8 in this state when printing is stopped, the handle operation shaft 31 is rotated with the shaft rotation locking means 45 removed.

In addition, when removing the plate cylinder 8, the handle 3
6, the handle operating shaft 31 is moved to the draw-out limit position where the inner end shaft portion 32 disengages from the plate cylinder center shaft 14 and comes out of the central boss inner hole 10a at one end of the plate cylinder 8, and this moving state is latched by the axial movement latching means 40 (at this time, a space is created between the end surface of the boss portion 10 at one end of the plate cylinder and the inner end surface of the open bearing portion 27 to allow movement of the plate cylinder 8 in the axial direction. g is formed, and in this state, the boss portion 10 at one end of the plate cylinder 8 is supported by the bearing portion 27 having an opening on the outer periphery.
Since the boss portion 11 at the other end of the plate cylinder is fitted and supported by the concave bearing portion 22 of the plate cylinder rotary disk 21, the plate cylinder 8 will not fall down even if the handle operating shaft 31 is removed. In this state, hold the plate cylinder 8 with both hands and move it in the axial direction.
and the protruding pin 13 on the concave bearing portion 2 of the plate cylinder rotating disk 21.
2 and the pin engaging portion 23, the plate cylinder 8 is lifted upward. Then, the central boss portion 10 at one end of the plate cylinder 8 is connected to the bearing opening 2 of the plate cylinder support shaft 25.
6, the plate cylinder 8 can be easily removed from between the plate cylinder rotary disk 21 and the plate cylinder support shaft 25. Incidentally, when the plate cylinder 8 that has been removed as described above is to be pivoted again, it is sufficient to carry out the operation opposite to that when removing it.

〔Example〕

An example of this invention is shown below in Figures 1 to 10.
To explain in detail according to the drawing in the figure, the plate cylinder 8 of this rotary copying machine has central boss portions 10, 11 protruding from the center of both ends, and a rotary coupling portion protruding near the center boss portions 10, 11. A rotatable plate cylinder center shaft 14 is inserted into and supported inside the plate cylinder 8 so as to be rotated by external operation, and a rotatable plate cylinder center shaft 14 is provided at both ends of the plate cylinder center shaft 14. A pair of left and right plate-shaped support rods 15 fixed to the outer periphery, and a pair of left and right rotation links bent in a substantially dogleg shape with intermediate bending portions pivotally supported at both ends of a horizontal shaft 16 of the left and right support rods 15. 17, which is pivoted parallel to the plate cylinder center axis 14 at the tip of the longer arm of this rotating link pair 17 that extends in the direction of the plate cylinder inner circumferential surface 8a, and is brought into contact with and separated from the plate cylinder inner circumferential surface 8a. As shown in FIG. 3, an inking roller 18 made of an elastic roller made of rubber or the like and a cam contact roller 19 attached to the tip of the shorter arm of the pair of links 17 are provided as shown in FIG. A substantially egg-shaped cam 2 is provided on the inner side and is in rotational contact with the trochanter 19.
0 is fixed. This cam 20 prevents the rotation of the roller 20 from being hindered by the connecting portion between the plate cylinder inner circumferential surface 8a and the plane portion 8b when the inking roller 18 contacts the plate cylinder inner circumferential surface 8a and rotates. Each time the plate cylinder 8 rotates once, the cam comes into contact with the link end roller 19, thereby lifting the inking roller 18 from the plate cylinder flat portion 8b.

The inking roller 18 is adjusted to a position where it contacts the inner circumferential surface 8a of the plate cylinder when the ink in the plate cylinder 8 is running low, and is rotated by rotation of the plate cylinder 8 in the direction of the arrow in FIG. 3 (counterclockwise direction). The ink trapping effect forces the ink to be extruded onto the plate-making base paper a, but during normal printing when there is an appropriate amount of ink, the position is adjusted so that it floats completely away from the inner circumferential surface of the plate cylinder 8a, and the ink is At the start of printing after a new supply of ink, the position is adjusted to be close to the inner circumferential surface 8a of the plate cylinder in order to quickly and uniformly spread the ink mass over the entire inner circumferential surface 8a of the plate cylinder. That is, the inking roller 19 is rotated in three stages by the rotation of the handle operating shaft 31, which will be described later, to move the inking roller 19 to the inner circumferential surface 8a of the plate cylinder.
The position is adjusted in three stages: a state in which it is in contact with the plate cylinder, a state in which it is floated several mm from the inner circumferential surface 8a of the plate cylinder, and a state in which it is floated completely away from the inner circumferential surface 8a of the plate cylinder.

Next, a description will be given of the plate cylinder 8 attachment/detachment device incorporating the inking roller device as described above.
and a cylindrical plate cylinder support shaft 25 that is driven to rotate.
A handle operating shaft 31 is fitted into the plate cylinder support shaft 25 so as to be movable and rotatable, and a shaft movement locking means 40 that locks the handle operating shaft 31 from moving inward in the pulled out state. , a shaft rotation locking means 45 for rotating and locking the handle operating shaft 31 in stages, and an inner end bearing opening 26 of the plate cylinder support shaft 25.
and a position detecting means 60 for detecting the home position where the arrow is facing upward.

To explain each component in more detail, the plate cylinder support shaft 25 has a bell-shaped expansion opening 26 as shown in FIG. It has an outer periphery opening type bearing part 27 and a groove-shaped pin engaging part 28 opened in the inner bottom surface of the bearing which receives and engages the protruding pin 12 at one end of the plate cylinder 8 as shown in FIG. side frame 29
The bearing 29a held in the frame mounting base 30
It is supported by a bearing 30a, which is held by a bearing 30a, so as to rotate around a horizontal axis. Note that there is a space between the inner end surface of the open bearing portion 27 of the plate cylinder support shaft 25 and the end surface of the boss portion 10 at one end of the plate cylinder supported by the bearing portion 27, so that the shaft of the plate cylinder 8 when the plate cylinder is removed is A space g is formed that allows movement in the center direction (movement that allows the plate cylinder other end boss portion 11 and the protruding pin 13 to engage and disengage from the concave bearing portion 22 and pin engaging portion 23 of the plate cylinder rotary disk 21). There is.

The plate cylinder rotating disk 21 has a central boss part 11 at the other end of the plate cylinder 8, a concave bearing part 22 into which the protruding pin 12 is fitted by pushing in the axial direction, and a pin engaging part 23.
and is supported by a bearing 24a on the other side frame 24 of the body so as to rotate around a horizontal axis,
It is adapted to be rotationally driven by a rotational drive system (not shown).

The handle operating shaft 31 is fitted into the inner hole 10a of the central boss portion 10 at one end of the plate cylinder 8, and
4, an outer end shaft 33 extending outward from the plate cylinder support shaft 25, and an outer periphery of the outer end shaft 33. The spring 3 has a neck portion 33a formed by a recessed annular groove, and the spring 3 is configured such that the convex portion of the inner end shaft portion 32 is engaged with the concave portion of the shaft end of the plate cylinder center shaft 14.
4, it is fitted into the plate cylinder support shaft 25 as shown in FIG. 1 so that it can move along a certain stroke axis and rotate around the axis. A handle mounting tube 35 is fitted onto the outer end shaft portion 33 of the handle operating shaft 31 and fixed with a screw, and an elongated handle-shaped puller 36 is fitted into the outer end of the handle attachment tube 35 with a locking mechanism. The first
The handle operating shaft 31 is tightened and fixed as shown in the figure, and by pulling the handle 36, the handle operating shaft 31 is moved to the drawer limit position where the inner end shaft 32 comes out from the central boss inner hole 10a at one end of the plate cylinder as shown in FIG. It is now possible to do so.

A lockable shaft movement locking means 40 that locks the inward movement of the handle operating shaft 31 when the handle operating shaft 31 is pulled out as shown in FIG.
is a dowel-shaped stopper protrusion 41 protruding from the outer circumference of the inner end of the handle mounting tube 35 of the handle operating shaft 31.
and a shaft bearing body 44 fixed to the base 30, which has a guide hole 42 for guiding the handle mounting tube 35 and has a passage groove 43 for the stopper protrusion 41 recessed inside the guide hole 42. Guide port 42 of body 44
The stopper protrusion 41 that has passed through the handle 36 is rotated in the pulled out state to displace the stopper protrusion 41 within an appropriate angular range from the position of the protrusion passage groove 43, and is placed on the opening end surface of the shaft bearing guide port 42 at the reference numeral 41' in FIG. As shown, it is configured to be locked.

The shaft rotation locking means 45 is operated when the position of the inking roller 18 inside the plate cylinder 8 is adjusted stepwise from the outside of the plate cylinder 8. 32 is the plate cylinder center axis 1
It is constructed as a latching mechanism that can be rotated step by step while being engaged with the concave and convex portions of the locking mechanism. That is, this shaft rotation locking means 45 has a handle fitting groove 46 and a locking pawl 47, and is pushed in the direction of the handle 36 by a spring 48 and fitted so as to be movable. A disk-shaped rotating operation body 49 and the shaft bearing body 4
Three pawl engaging holes 51, 52 are provided in an arcuate plate portion 50 which is fixed at the opening side end position of No. 4 so as to face and be spaced apart from the rotation operation body 49, and which is the rotation area of the latching pawl 47.
53 at predetermined angular intervals (in this embodiment, the claw engaging holes 5
1, 52 angle interval is 25 degrees, claw engagement holes 52, 53
The angular interval is set to 45 degrees).
It consists of a hanging plate 54 with a cutout as shown in the figure,
The locking pawl 47 engaged with one pawl engagement hole of the locking plate 54 is removed from the locking plate 54 by a pushing operation against the spring 48 of the rotation operating body 49.
By manually rotating the rotating operating body 49 fitted with the handle together with the handle 36, the inking roller 18 in the plate cylinder 8 can be rotated in stages to change its position in three stages. It is configured.

The position detecting means 60 detects the home position in which the inner end bearing opening 26 of the plate cylinder support shaft 25 faces upward, and uses this detection signal to detect the position of the plate cylinder 8.
The rotary drive system (not shown) is controlled from the bearing opening 26 so that it stops at the home position when printing is stopped. Light-shielding shutter 61
A photocoupler 63 is mounted on a support plate 64 fixed to the frame as shown in FIGS. It is made up of.

The rotary disk 62 is configured as a rotary lock disk having a U-shaped notch hook 62a as shown in FIG. A lock lever 65, which is rotated by pulling and moving the handle operating shaft 31, is engaged with the lock lever 62a, so that rotation of the disk when the plate cylinder is attached or detached is locked at the home position. The lock lever 65 also has a light-shielding shutter plate 66 that rotates together with the lever, and when the rotary disc 62 is locked, the shutter plate 66 is activated by a photocoupler 76 as a safety switch (this photocoupler 76 is connected to the support described above). (fixed to the plate 64) is turned off to prohibit the motor drive of the plate cylinder rotation drive system.

That is, the lock lever 65 is formed of a U-shaped plate as shown in FIG. 8 having a light-shielding shutter plate 66 that rotates together with the lever, and a lever piece 67 extends from a portion connected to the shutter plate 66. The tip is rotated by a spring 68 so that it is pressed against the inner end surface of the handle mounting cylinder 35 as shown in FIGS. As shown in FIGS. 7 to 9, it is pivotably mounted. In a normal state, this lock lever 65 is waiting at the engagement/disengagement position shown by the solid line in FIG. In the state shown by the solid line in FIG. 9, the photocoupler 76 as a safety switch is turned on so that the plate cylinder 8 is rotated), but when the plate cylinder 8 is attached or detached, the handle 36 is pulled. When the handle mounting tube 35 is moved outward, the lock lever 65 is moved by the spring 68.
is rotated as shown by the imaginary line in FIG.
The optical path of the photocoupler 76 is opened, as shown in the imaginary line in Figure 9, and the photocoupler 76 as a safety switch is turned OFF, prohibiting the motor drive of the plate cylinder rotation drive system). Locks disc rotation when attaching and detaching. Due to this disc lock, the plate cylinder support shaft 25 is rotationally locked at the home position where the bearing opening 26 is in an upward position as shown in FIG. As a result, the photocoupler 76, which serves as a safety switch, will be turned OFF.
The plate cylinder 8 can be attached and detached easily and safely.

Reference numeral 71 shown in FIGS. 2 and 6 is a shaft stop lever that prevents the handle operating shaft 31 from moving in the axial direction when the plate cylinder 8 rotates. 30 by a pin 72, and is rotationally biased by a spring 73 of a solenoid 74 so that the tip of this lever removably engages with the neck portion 33a of the handle operating shaft 31. When the handle operating shaft 31 is pulled and moved when the plate cylinder 8 is attached or detached, the shaft stop lever 71 is rotated clockwise in FIG. 6 by the operation of the solenoid 74.
It is adapted to be engaged and disengaged from the first neck portion 33a.

FIG. 1 is a cross-sectional plan view showing a state in which the plate cylinder is supported in a state in which the shaft end of the plate cylinder center shaft 14 and the inner end shaft part 32 of the handle operating shaft 31 are engaged with each other in a concave and convex manner, with a main part cut away. In this state where the plate cylinder is pivoted, the rotary operating body 49 is pushed in to disengage and disengage the latch claw 47 from the latch plate 54, and in this state where the claw is disengaged, the handle 36 of the rotary operating body 49 fitted with the handle is released. When the handle operating shaft 31 is rotated at the same time, the plate cylinder center shaft 14, which is engaged with the operating shaft in a concave and convex manner, is rotated to adjust the position of the inking roller 18 in the plate cylinder 8. It can be adjusted as described above.

In addition, by pulling the handle 36 in the state shown in FIG. 1, the inner end shaft portion 32 of the handle operating shaft 31 is disengaged from the plate cylinder center shaft 14 and pulled out from the central boss inner hole 10a at one end of the plate cylinder 8. It is moved to the drawer limit position where it comes off as shown in FIG.
When latched by displacement engagement as shown in 1',
A space g that allows movement of the plate cylinder 8 in the axial direction is formed between the end surface of the boss portion 10 at one end of the plate cylinder and the inner end surface of the open bearing portion 27 as shown in FIG. 10 (at this time,
The boss portion 10 at one end of the plate cylinder 8 is supported by a bearing portion 27 having an opening on the outer periphery, and the boss portion 11 at the other end of the plate cylinder is fitted and supported by a concave bearing portion 22 of the plate cylinder rotary disk 21, so that the handle operation shaft (Even if the plate cylinder 8 is removed, the plate cylinder 8 will not fall down). After the pin 13 is disengaged from the concave bearing portion 22 and the pin engaging portion 23 of the plate cylinder rotary disk 21, the plate cylinder 8 is lifted upward, whereby the plate cylinder 8 is separated from the plate cylinder rotary disk 21 and the plate cylinder. It can be easily removed from between the support shaft 25. Furthermore, the removed plate cylinder 8 can be easily installed by performing the opposite operation to that for removal.

[Effect of idea]

The plate cylinder attachment/detachment device for the rotary copying press of this invention is as described above, and although it is a plate cylinder device in which the position of the inking roller can be adjusted,
This has an excellent practical effect in that the work of attaching and detaching the plate cylinder can be done easily and safely.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional plan view showing a main part of a plate cylinder attachment/detachment device according to an embodiment of the present invention, FIG. 2 is a side view of the main part of this plate cylinder removal device, and FIG. D
- Sectional view showing the internal structure of the plate cylinder along line D, No. 4
The figure is a cross-sectional view taken along line A-A in Figure 1, Figure 5 is a cross-sectional view taken along line B-B in Figure 1, Figure 6 is a cross-sectional view taken along line C-C in Figure 1, and Figure 7 is a cross-sectional view taken along line C-C in Figure 1. FIG. 8 is a sectional view taken along line E-E of FIG. 7, FIG. 9 is a sectional view taken along line G-F of FIG.
A sectional view taken along the line G, FIG. 10 is an explanatory diagram of the operation when the plate cylinder is removed, corresponding to FIG. 1, and FIG. 11 is an explanatory diagram of the configuration of a rotary copying press to which the present invention is applied. 8... Plate cylinder, a... Base paper for plate making, 10... Center boss portion at one end of the plate cylinder, 10a... Inner hole of the same boss portion, 1
1... Central boss portion at the other end of the plate cylinder, 12... Projecting pin at one end of the printing cylinder, 13... Projecting pin at the other end of the printing cylinder, 14
... Plate cylinder center shaft, 18 ... Inking roller, 21 ... Plate cylinder rotary disk, 22 ... Concave bearing portion of the plate cylinder rotary disk, 23 ... Pin engagement portion of the plate cylinder rotary disk,
24...Frame on the other side of the machine body, 25...Plate cylinder support shaft, 26...Bearing opening, 27...Outer periphery opening type bearing, 28...Pin engagement part of the same bearing part, 29...
... Frame on one side of the fuselage, 30 ... Base fixed to the frame, 31 ... Handle operation shaft, 32 ... Inner end shaft part of handle operation shaft, 33 ... Outer end shaft part of handle operation shaft, 34 ... Handle Spring for biasing the operating shaft, 35... Handle mounting cylinder, 36... Puller, 40... Axis movement latching means, 41... Stopper protrusion, 42... Guide port, 43... Protrusion passage groove, 4
4... Shaft bearing body fixed to the base, 45... Shaft rotation locking means, 46... Handle fitting groove, 47... Latching claw, 48
...Spring for biasing the rotating operation body, 49...Rotating operation body, 50...Circular plate portion serving as the rotation area of the latching claw, 51, 52, 53...Claw engaging hole, 54...
...Latching plate, 60...Position detecting means, 61...Light-shielding shutter, 62...Rotating disc, 62a...Latching portion on outer circumference of disc, 63...Photocoupler, 65...
Lock lever, 66...Shading shutter plate, 67...
...Extending lever piece, 68... Spring that biases the locking lever and the light-shielding shutter plate to rotate, 70... Pivot that serves as a rotational fulcrum for the locking lever and the light-shielding shutter plate, 71... Lever, 74... Locking lever rotation Dynamic solenoid, 76...photo coupler as a safety switch.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A plate cylinder with a plate base paper wrapped around its outer periphery, ink stored inside, and a plate cylinder center shaft which is rotated by external operation; , an inking roller parallel to the plate cylinder center axis is provided, which is brought into contact with and separated from the inner peripheral surface of the plate cylinder by the rotation of the plate cylinder center axis, and this inking roller forces the ink stored in the plate cylinder onto the base paper for plate making. This is a plate cylinder attachment/detachment device applied to a rotary copying press that can push out the plate cylinder, and the plate cylinder has an outer circumferential opening-type bearing part that receives the center boss part of one end of the plate cylinder from above at the inner end, and a protruding part of one end of the plate cylinder. A cylindrical plate cylinder support shaft that has a pin engagement part that receives and engages a pin and is rotatably supported on one frame part of the body so as to rotate around a horizontal axis, and a center of the plate cylinder at the other end. The boss part and the protruding pin have a concave bearing part and a pin engaging part into which the boss part and the protruding pin are fitted by pushing in the axial direction, and the other side frame part of the body is supported so as to rotate around the horizontal axis. The plate cylinder has an inner end shaft part which is removably engaged with one end shaft part of the plate cylinder center shaft fitted into the inner hole of the central boss part of one end of the plate cylinder. a handle operating shaft which is biased by a spring so that the inner end shaft portion is engaged with the shaft end of the plate cylinder center shaft so as to be movably and rotatably inserted into the plate cylinder support shaft; While this handle operating shaft is moved by pulling the handle to the draw-out limit position where the inner end shaft comes out of the inner hole of the center boss at one end of the plate cylinder, the handle operating shaft is moved inward. a lockable shaft movement locking means for locking and releasing the lock, and an inner end shaft portion of the handle operating shaft for adjusting the position of the inking roller inside the plate cylinder stepwise from the outside of the plate cylinder. The shaft rotation locking means rotates and locks the plate cylinder in stages in a state in which the plate cylinder is engaged with the projections and the projections, and the home position where the inner end bearing opening of the plate cylinder support shaft faces upward is detected, and this detection signal is detected. and position detection means for controlling the rotary drive system of the plate cylinder so that the bearing opening stops at the home position when printing is stopped. (2) The shaft movement latching means includes a stopper protrusion protruding from the outer circumference of the inner end of the handle mounting tube of the handle operating shaft;
It consists of a shaft bearing body fixed to a base, which has a guide hole for guiding the handle mounting cylinder and has a passage groove for the stopper protrusion recessed inside the guide hole, and the stopper protrusion that has passed through the shaft bearing guide hole is inserted into the handle. The mimeosha wheel according to claim 1 of the utility model registration claim, characterized in that it is configured to be displaced from the position of the protrusion passage groove by rotational operation and to be locked to the opening end surface of the shaft bearing guide port. Turning machine plate cylinder attachment/detachment device. (3) The shaft rotation latching means has a handle fitting groove and a latching claw, and a rotation operating body that can be pushed and moved in the direction of the handle by a spring, and a position facing and away from the rotation operation body. It consists of a latching plate with a plurality of pawl engagement holes cut out at predetermined angular intervals in the portion that is fixed to the latching pawl and serves as the rotation area of the latching pawl. By pushing the rotating operating body to remove the latching claw from the latching plate, and rotating the rotating operating body fitted with the handle,
A plate cylinder attachment/detachment device for a rotary copying machine according to claim 1, characterized in that the device is configured to allow stepwise rotational adjustment. (4) The home position detection means includes a rotating disk fixed to the plate cylinder support shaft and having a light-shielding shutter on its outer periphery, and a photocoupler arranged at the portion of the rotating disk where the outer periphery of the light-shielding shutter rotates. A plate cylinder attachment/detachment device for a rotary copying machine according to claim 1, characterized in that it is comprised of: