JPS5851153A - Ink doctor change-over device for mesh roll to be rotatable normally and reversely - Google Patents

Abstract

PURPOSE:To change the contact direction and position of doctor blades quickly and easily in response to a mesh roll as it is changed over to rotate normally or reversely by such an arrangement wherein three-forked arms for changing over to normal or reverse direction are provided so that they can be connected individually to arms supporting a pair of doctor blades. CONSTITUTION:A pair of doctor blades 14, 15 which can be brought to contact with a mesh roll 13 is arranged to oppose to each other and supporting arms 18, 19, 20, 21 of each blade and three-forked arms 28, 29 for normal and reverse change-over which can be connected individually to those aupporting arms are provided in parallel on eccentric sleeves 24, 25 at both ends 22, 23 of a fountain roll 12. The left or right blades 14, 15 is changed over, one or the other, by a clutch mechanism and at the same time, any blade, the left and right one 14, 15, can be changed over immediately and easily to operating position or stop position by the reciprocation of a single air pressure cylinder 34 alone through the three-forked arms.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention enables the cylinder of either one of two sets of rotary printing units each consisting of a plate cylinder and an impression cylinder to be driven in both forward and reverse rotational directions, so that double-sided printing of a web can be achieved. The present invention relates to an ink scraping and converting device for a mesh roll that supplies ink to the plate cylinder on the reversibly rotatable unit side in a printing system capable of handling two types of printing: color printing and single-sided two-color printing on a web. In more detail 1i1) 1, in the above case, the rotational direction of the mesh roll is also required to be changed as the rotational direction of the plate cylinder is changed, and furthermore, along with this, the doctor blade that contacts the mesh roll is changed. Since it is also required to change the contact position and contact direction, the present invention relates to an ink scraping conversion device that can fully accommodate such a mess roll capable of forward and reverse rotation.

Metshuror (also known as Amilor, Screentrol) was first developed as an ink supply system for flexible printing, but it made the printing mechanism smaller and lighter by eliminating the need for a large group of ink cylinders (5). Since Merift contributes to simplicity and low cost, the idea of incorporating Metsushi Roll into general convex wheels and offset rotary mechanisms is being advanced.
As an extension of this idea, there is a need for an ink scraping conversion device that can be applied to a reversibly rotatable mesh roll corresponding to a reversibly rotatable plate cylinder.

When the doctor blade is attached so that its tip contacts the surface of the mesh roll at a reverse angle, that is, at an angle opposite to the direction of rotation of the roll, the ink on the surface of the mesh roll is scraped off by the blade. Therefore, if the mensch roll rotates in both forward and reverse directions, it is necessary to switch the contact direction of the blade to the roll to the completely opposite direction when switching the rotation direction of the roll, and at the same time, the contact position of the blade to the roll also needs to be changed to the fountain roll tonneau contact direction. It is necessary to switch to immediately after the position.

The first object of the present invention is to provide an ink scraping device that can quickly, simply and easily change the contact direction and position of a doctor blade in response to switching between the normal (6) and reverse rotation directions of the mesh roll. That's true.

The second object of the present invention is to allow the drive system to start only when the forward/reverse rotation direction switching of the mesh roll and the corresponding switching of the doctor blade completely match, and never to start the drive system during mismatch. It is an object of the present invention to provide an ink scraping conversion device equipped with a safety means to prevent malfunction.

To summarize the concept of the present invention, a pair of left and right doctor blades that can come into contact with the mensch roll are arranged facing each other, and each base ring part of the left and right valley arms that respectively support the left and right blades, The base ring part of the three-pronged arm for reverse switching is fitted into the circumferential surface of the eccentric sleeve supporting the end shaft of the fountain roll so that the three-pronged arm can rotate freely. A right clutch mechanism that enables reciprocating angular displacement operation with one actuator, and further includes a right clutch mechanism that connects or disconnects the right blade operating arm of the three-pronged arm and the right blade support arm; A left clutch mechanism is provided to connect or disconnect between the left blade operating arm and the left blade support arm, or in addition to the configuration of one arrangement, the left blade operating position Inputting both the output signal from the detector and the forward rotation drive connection completion signal of the gear train for driving the printing unit, or the output signal from the right blade operating position detector and the reverse drive connection of the gear train for driving the fingerprint printing unit. The point is that a safety circuit is provided that allows the printing unit to be activated only by inputting both the completion signal and the completion signal.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure and operation of the present invention will be explained in detail below with reference to the drawings according to one specific embodiment.

7. The rain roll 12 is a mensch roll 1 that takes out ink from an ink pan (not shown) and comes into contact with it.
Ink on 3? supply

The left doctor blade 14 is, as shown in FIG.
The doctor blade 15 on the right side is disposed at a position immediately after contacting the fountain roll 12 on the roll when the mensch roll 13 rotates forward, so that its tip comes into contact with it in an attitude that is in the opposite direction to the rotation direction. As shown in FIG. 2, the mesh roll 13 is disposed at a position immediately after it contacts the fountain roll 12 on the roll when the mesh roll 13 rotates in the reverse direction, so that its tip comes into contact with the mesh roll 13 in an attitude that is reversed in the rotation direction.

The left and right blades 14 and 15 are, as shown in FIG.
They are fixed on mounts 16 and 17, respectively, and both ends of each mount are supported and fixed to the tips of support arms 18, 19, 20 and 21, respectively.3 The base of each support arm is made in an annular shape. The rings are pivotably fitted into the surfaces of the eccentric sleeves 24 and 25, which respectively carry the shafts 22, 23 at both ends of the seven-mountain roll 12.

Fountain roll 12 is supported by respective eccentric sleeves 24, 25 on side frames 26 and 27, respectively.

In addition, the respective base rings of the third (9) arms, ie the three-pronged arms 26 and 27, are respectively fitted into the surfaces of the eccentric sleeves 24,25.

As shown in FIG. 8, the three-pronged arms 28 and 29 each have three arms extending in the radial direction from each base ring, namely, a right blade operating arm 28a, a left blade operating arm 28b, and a displacement transmitting arm. 28 protruding c.

The displacement transmission arm 28c is connected to a cross shaft 32 via a link 30 and an arm 31, and is further connected to a single actuator, such as a pneumatic cylinder 34, via an arm 33 provided at one end of the shaft. A predetermined reciprocating angular displacement is transmitted following the reciprocating displacement of the cylinder.

The three types of arms 18, 20, 28 and 19, 21, 29 arranged in parallel on the eccentric sleeve 24, 25 may be arranged in any order, and in the embodiment shown in FIGS. Arms 28 and 29 are located at each outer end, and in the embodiment of FIGS. 1-4, three-pronged arm 28
is located at the inner end, essentially the displacement resulting from the single actuator 34 is transferred via the three-pronged arm (10) to the mesh roll 13 (7).
It is sufficient if the switching operation can be performed by a clutch so that when the mesh roll 13 rotates to the right, the transmission is transmitted to the left blade support arm 18, 19, and conversely, when the mesh roll 13 rotates to the left, the transmission is transmitted to the right blade support arm 20, 21. The example shows a pink launch mechanism.

The support arm 2o of the right blade 15 and the right f of the three-pronged arm
The blade operating arm 28a is connected to a rack for passing a bottle 37 to both holes 35 and 36 cut at the tip of each arm, and the pin 37 is connected to either hole 35 and 36. The connection is released by moving the vehicle backwards.

The support arm 18 of the left blade 14 and the left blade operating arm 28b of the three-pronged arm are connected by passing a frame 4° through both holes 3 and 39 cut at the tip of the valley arm. The connection is released by retracting the bottle 40 to only one of the holes. □ In the illustrated embodiment, the pin clutch mechanism is shown as the simplest manual operation, but it is also possible to operate the pin fully automatically electromagnetically.

FIG. 2 shows that the left bin 40 is connected to both arms 18 and 28.
b indicates the phase of the connection operation, and when this connection is completed, the pneumatic cylinder 34? When actuated to angularly displace the displacement transmission arm 28c of the three-pronged arm to the left via the arm 33, cross shaft 32, arm 3] and link 30t, the left blade 14 will move as shown in FIG. The mesh roll 13 comes into contact with the curved surface, and ink can be scraped off by forward rotation.

On the other hand, FIG. 4 shows the phase in which the right-hand bottle 37 connects both arms 20 and 28 a fc, and when this connection is completed, the pneumatic cylinder 34 is actuated.
When the displacement transmission arm 28c of the three-pronged arm is angularly displaced to the right, the blade 15 on the right comes into contact with the circumferential surface of the mesh thrower A/13, as shown in FIG.
? :, ink can be scraped off. - A claw 41 extending below the left blade support arm 18
is a lever for adjusting the total contact pressure of the blade 14 against the roll 13, and is attached to the bracket 4 on the stand 42.
The claw 41 is attached to the tip of the adjusting screw rod 44 screwed to the
The stop angle position of the pawl 41 is adjusted by the 01r forward and backward displacement of the threaded rod 44, thereby changing the contact pressure of the left blade 14. Similarly to the above, a claw 45 also protrudes below the right blade support arm 20,
Adjustment screw rod 4 screwed to bracket 46 on stand 42
By the displacement operation 7, the stop angle position of the pawl 45 is regulated, thereby changing the contact pressure of the right blade 15.

The left and right stoppers 48 and 49 are for adjusting the respective pin holes of the respective blade support arms 18 and 20, and by finely adjusting the stoppers back and forth, the holes 39 and 36 of the arms 18 and 20 are 3-pronged. The holes 38 and 35 on the arm 28 coincide with each other when the clutch is released.

Therefore, in FIGS. 1 and 4, a right-hand pin clutch operation is possible, and in FIGS. 2 and 3, a left-hand bin clutch operation is possible. In the left blade support arm 18 of the first (13) figure and the right blade support arm 2o of FIG. On the left blade support arm 18, the bins 37 and 4o are each in a disengaged position.

In this way, even if each pair of arms 20.28a and I8.28b, which can be connected by the bins 37 and 40, are constructed inseparably from each other, as shown in FIGS. 1 and 3, If one is in operation, the other is always lowered to the retracted position, so it is easy to clean, replace, inspect the blade, etc.

However, when inspecting, maintaining, or replacing the mesh roll 13 or adjusting the contact pressure of the fountain roll 12, both blades 14 and 15 are in a non-contact position where they are evacuated from the circumferential surface of the mesh roll 13.
Therefore, as shown in FIGS. 2 and 4,
It is necessary to disconnect by removing the bottle.

(14) Furthermore, assuming that the opening angles of both blades 14 and 15 are always constant, it becomes impossible to individually adjust the contact pressure of each blade against the mesh roll 13, and the amount of eccentricity of the sleeve etc. In addition, this would hinder smooth ink scraping, so the support arms of both blades were installed separately to enable individual fine adjustment of the angular displacement.
It is configured to be able to independently convert both contact pressures.

If the operating procedure is correct, the above configuration will produce and obtain a sufficient ink scraping and conversion effect, but in the unlikely event that there is a slap in the hand and the blade on the anti-phantom side comes into contact with the mesh roll, Alternatively, if the printing unit is started without any pre-print contact, the ink will not be scraped off, so a large amount of ink will be supplied to the same plate, and the paper will become completely black. Since a large amount of ink adheres to the paper, problems such as the paper being wrapped around the guide roll or the folding drum or the ink scattering and staining the surrounding area occur.

The safety circuit to prevent the above trouble from occurring is as follows. Detectors each detecting that the left blade 14 and the right blade 15 are in an operating position in which they are in contact with the circumferential surface of the mensch roll 13 and can scrape off ink;
For example, the limit switches 50 and 51, for example the claw 41
and 45 are installed in line with the end faces of the stoppers 44 and 47, respectively, when the left blade 14 is in the operating position, the left limit switch 50 is closed and a signal is output from there, and at that time the right limit switch 50 is closed and a signal is output from there. Since the switch 51 is open, no signal can be output from the right side. When the right blade 15 is in the operating position, the right limit switch 51 is closed and a signal is output therefrom, and no signal is output from the left limit switch 50.

On the other hand, a signal indicating that a gear train (not shown) that drives the plate cylinder and impression cylinder of the printing unit and their associated ports (not shown) is in the forward rotation drive connection state and a signal indicating that the gear train (not shown) for driving the plate cylinder and impression cylinder of the printing unit are in the forward rotation drive connection state; The signal notifying that the drive is connected is, for example, disclosed in U.S. Pat. No. 56-113243 filed by the same applicant.
It can be easily obtained by the number etc.

Therefore, as exemplified by the safety circuit in FIG. 11, both the output signal from the limit switch 50 that detects that the left blade is in the operating position and the forward rotation drive connection completion signal 52 of the gear train for driving the printing unit. A drive command signal 54 from an AND circuit 53 that opens when there is human power, or an output signal from a limit switch 51 that detects that the right blade is in the operating position, and a reverse rotation drive of the gear train for driving the printing unit. If the setting is made so that the printing unit is allowed to start only by the drive command signal 57 from the AND circuit 56, which is opened when both the connection completion signal 55 and the connection completion signal 55 are input, the above conditions can be met. Since it is impossible for the unit to be driven while there is no power, the above-mentioned trouble is solved.

In the present invention, a pair of left and right doctor blades 14 and 15 that can come into contact with the mesh roll 13 are arranged facing each other, and
Support arms 18.19, (17) 20.21 of each blade and 3 for forward/reverse switching that can be individually connected to them
The forked arms 28, 29 are arranged in parallel with the eccentric sleeves 24, 25 on the shafts 22, 23 at both ends of the fountain roll 12, and the left and right blades can be selectively switched by the Kujich mechanism. By only reciprocating movement of one actuator 34, it is possible to immediately and easily convert either the left or right blade between the operating position and the rest position via the three-pronged arm, and the conversion mechanism is simple and inexpensive. It is easy to use because it has low friction and each blade can be easily inspected, repaired, replaced, etc., and there is no risk of hindrance to maintenance and inspection of mesh rolls and fountain rolls. Furthermore, it is equipped with a safety circuit that prevents the printing unit from driving while the ink scraping and conversion work is not completed, and prevents confusion between blade sorting and drive sorting, so all troubles caused by malfunctions can be avoided. It is also possible to prevent this from happening.

[Brief explanation of the drawing]

The drawings show a specific embodiment of the invention. (18) Figures 1 to 4 show vertical cross-sectional front views taken along line A-A in Figure 5, of which Figure 1 shows the mesh roll rotating in the normal direction and the left doctor blade for normal rotation in contact with it. Figure 2 shows the state in which the clutch pin of the left doctor blade is operated for the mesh roll which has been switched to enable forward rotation, and Figure 3 shows the mesh roll rotating in the opposite direction and the right doctor blade for reverse rotation in contact with it. Fig. 4 is an explanatory diagram showing the state in which the clutch pin of the right doctor blade is operated with respect to the mensch roll which has been switched to enable reverse single rotation drive, and Fig. 5 is an explanatory diagram showing the state where the clutch pin of the right doctor blade is operated. Figure 6 is a cross-sectional plan view taken along line 6-6 in Figure 1, Figure 7 is a schematic cross-sectional view taken along line 7-7 in Figure 2, Figure 8 is a forward and reverse view. Figure 9 is a front view of the left doctor blade support arm for forward rotation. Figure 10 is a front view of the right doctor blade support arm for reverse rotation. Figure 11 is a forward/reverse switching malfunction. It is a prevention safety circuit diagram. 12...7 Mountain roll, 13...Mesh roll, 14...Left side doctor blade, 15...Right side doctor blade, 16 and 17...Mounting base, 18.19.20 and 21. ...Blade support arm,
22.23...Axle at both ends of fountain roll, 24
．． 25... Eccentric sleeve, 26.27... Side frame, 28.29... Three-pronged arm, 28 a... Right side blade operating arm, 28 b...
・Left side plate, blade operation arm, 28 c...Displacement transmission arm, 30...Link, 31...Arm, 32.
... Cross shaft, 33 ... Arm, 34 ... Pneumatic cylinder, 35.36.38.39 ... Bottle hole, 3
7.40...bottle, 41.45...nail, 42...
Base, 43.46... Bracket, 44.47... Threaded rod type stopper for contact pressure adjustment, 48.49... Threaded rod type stopper for clutch bottle hole matching adjustment 150, 51
... Rimint switch, 52... Forward rotation drive connection completion signal, 55... Reverse rotation drive connection completion signal, 53.56... AND circuit, 54.57... Drive command signal. Patent applicant Tokyo Kikai Seisakusho Co., Ltd. Patent attorney
Shigeru Sanne, Patent Attorney, Shigeru Sanne
゛ Mamoru (21) JP-A-58-51153 (9) 2530

Claims (2)

[Claims] (1) Centering on the point where the mesh roll contacts the fountain roll, each tip is placed at the target position on the left and right near it? Left and right 1 arranged facing each other so that they can be in contact with each other
A pair of doctor blades, respective tip portions supporting the respective blades at both ends of their respective mounts, and rotatably fitted into the curves of the respective eccentric sleeves respectively supported on the respective end shafts of the seven mountain rolls. two pairs of left and right blade support arms each having respective base ring portions; each base ring portion fitted into the curved surface of each of the eccentric sleeves so as to be freely pivotable; and three pairs of blade support arms each protruding from each of the base ring portions in the radial direction a pair of front and rear three-pronged arms for forward/reverse switching, each of which has two arms, that is, an operating arm for the right blade, an operating arm for the left blade, and a displacement transmission arm, and is connected to the displacement transmission arm via a link. a single actuator that provides a predetermined reciprocating angular displacement connects the right blade support arm and the right blade operating arm;
a right clutch mechanism for releasing the connection; the left blade support arm and the left blade operation';
An ink scraping conversion device compatible with a mensie roll that can be rotated in forward and reverse directions and comprising: a left clutch mechanism that connects and disconnects the arm; (2) Left and right 1 arranged oppositely so that each tip can touch the target position on the left and right near the position where the mesh roll contacts the fountain roll.
a pair of doctor blades, respective tips supporting the core valley blades at both ends of their respective mounts, and respective bases rotatably fitted into the surfaces of the eccentric sleeves respectively supporting the respective end shafts of the fountain roll; two pairs of left and right blade support arms each having a ring part; each base ring part fitted into the circumferential surface of each eccentric sleeve so as to rotate freely; and three blade support arms each protruding in the radial direction from each base ring part. an arm, that is, a front and rear j pair of three-pronged arms for forward/reverse switching, including an operating arm for the right blade, an operating arm for the left blade, and a displacement transmission arm; and a link to the displacement transmission arm. a single actuator that connects and provides a predetermined reciprocating angular displacement between the right blade support arm and the right blade operating arm;
a right clutch mechanism for releasing the connection therebetween; a left side flanch mechanism for connecting the left blade support arm and the left blade operating arm and releasing the connection therebetween; and an operation for causing the left blade to contact a surface of the mesh roll. Both an output signal from a detector that senses the position and a normal rotation drive connection completion signal of the gear train for driving the printing unit are input, or the right blade is in an operating position where it contacts the surface of the medicee roll. thing? a safety circuit that allows the printing unit to be activated only by inputting both an output signal from a sensing detector and a reverse drive connection completion signal of the gear train for driving the printing unit; and a mesh opening capable of forward and reverse rotation.・Ink scraping conversion device compatible with -.