JPH09314807A - Ink supply device of printing press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate an operation for residual ink disposal and cleaning following the replacement of ink by making a monolithic unit of an ink tank, an ink pump, an ink supply nozzle and an ink supply blade mechanism and installing this unit on a printing press main body in freely detachable manner, in an assembly of plural sets of ink supply device arranged side by side in the lateral width direction. SOLUTION: An ink 2 contained in an ink tank 1 is supplied to an ink supply nozzle 5 through an ink supply pipe 4 by an ink pump 3, and then is ejected to an ink fountain roller 6. The ink 2 adhering to the ink fountain roller 6 is transferred sequentially to ink roller groups including a delivery roller, and is finally transferred to a sheet through a blanket cylinder. In this case, an ink supply device 100 consisting of the ink tank 1, the ink pump 3, the ink supply pipe 4, the ink supply nozzle 5 and an ink supply blade 7 as constituents is unitized. Further, this unitized ink supply device 100 is mounted on a printing press main body in freely detachable manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink supply device mounted on an offset rotary press.

[0002]

2. Description of the Related Art FIG. 8 shows the overall construction of an offset rotary printing press using a keyless ink supply system, and FIG. 7 shows a conventional example of an ink supply device equipped in the rotary press. ing.

In FIG. 8, 30 is a paper to be printed, 9 is a blanket cylinder of an offset rotary printing press, and 28 is a blanket cylinder.
Is a plate cylinder, 26 is a plate wound around the plate cylinder 28, and 100 is an ink supply device. Such a rotary printing press supplies the ink 2 to the ink source roller 6 which is rotationally driven at a speed slightly lower than the machine body speed by a speed control motor (not shown), and through the gap at the tip of the ink supply blade 7. After adjusting to a predetermined film thickness, the ink delivery roller 8 and the receiving roller group 2 on the downstream side from the nip portion formed between the ink delivery roller 8 driven at the machine body speed
4 is supplied with ink, and further, the ink is supplied to the plate 26 via the inking roller 25.

In the case of offset printing, dampening water is generally supplied from the dampening device 27 to the plate 26. After a certain amount of the ink 2 has been transferred in the width direction, the ink 26 is further transferred from the plate 26 wound around the plate cylinder 28 to the blanket cylinder 9
The paper 30 is supplied to the paper 30 that travels by rolling through the paper, and the paper 30 is printed. For this reason, the ink 2 is not consumed and the ink film thickness does not decrease in the non-printed portion.

A doctor roller 31 is arranged on the way of the ink roller group, and the ink 2 is scraped off by a scraping doctor 32 which is in contact with the doctor roller 31, whereby the ink 2 is consumed in the entire width direction. Even if the ink 2 is uniformly supplied in the width direction, the consumption can be balanced.

[0006] In order to obtain a high-quality printed matter, it is necessary to use the ink 2 having a viscosity as high as possible even in the keyless inking which does not have the ink amount adjusting mechanism subdivided in the width direction. Becomes

In the ink supply device 100, an impeller 10 is provided at the bottom of the ink tank 1 and a plate is attached to the outer circumference of a shaft 11 in a linear shape. The impeller 10 stirs the ink 2 and The movement of the ink 2 to the suction port of the ink pump 3 is assisted. The impeller 10 provided in the ink tank 1 is rotated by a drive motor (not shown).

In such an ink supply device, the ink 2
Is supplied from the ink pump 3 to the ink supply nozzle 5 through the ink supply pipe 4, and is supplied to the ink supply blade 7 by the rotational movement of the ink source roller 6.

However, when performing color printing, it is necessary to change the color of the ink 2 for each page in the width direction.
As a means for this, the ink supply device 100 is divided into a plurality of sets (for example, 2 to 4 sets) in the width direction and is configured to be able to supply the ink 2 of a different color for each page. .

Although the gap between the ink supply blade 7 and the surface of the ink source roller 6 is set once, printing is performed, but the ink supply blade 7 of the high-viscosity keyless ink supply device is conventionally It was not provided separately for each, but was integrally formed over the entire area of the ink source roller 6 in the axial direction.

FIG. 7 shows a block diagram of the above-mentioned conventional ink supply device. In the drawing, the ink 2 is sent from the ink tank 1 by the ink pump 3 and then supplied through the pipe joint 33. The ink is fed to the tube 4 and jetted from the ink supply nozzle 5 to the surface of the ink source roller 6. The ink 2 is then rotatably transferred in the direction of the arrow in FIG. 7 and the ink supply blade 7 is set with a predetermined gap.
The film thickness is adjusted to a constant value by, and the nip is further transmitted to the transfer roller 8.

Further, the residual ink after transfer is further rotatably transferred while being attached to the surface of the ink source roller 6, and scraped off by a scraper 34 attached directly below the ink supply nozzle 5. The excess ink scraped off by the scraper 34 and the ink supply blade 7 drops downward and is collected in the ink tank 1.

The ink supply device 100 is constructed by fixing both the ink supply nozzle 5 and the blade 7 fixed to the support 15 to the apparatus frame, and the color of the ink 2 is replaced or the blade 7 is cleaned at the time of maintenance. Is performed by swinging the support body 15 and the blade 7 around the fulcrum shaft 29 in the state indicated by the alternate long and short dash line in the figure.

Next, in changing the color of the ink 2, first, the pipe joint 33 provided on the way of the ink supply pipe 4 is separated and replaced with the ink tank 1 of the next order, and then the pipe joint 33 is connected. , The drive source coupling 14 provided on the main body side and the driven coupling 1 on the ink pump 3 side
And 3. Then, the ink pump 3 is driven to feed the new ink, and the old ink is pushed out to replace the ink 2. The polluted mixed ink and cleaning liquid are collected in another collection tank (not shown), and the next printing is started after a predetermined time, that is, after the replacement with new ink is completed.

[0015]

In the above-mentioned conventional ink supply device, since the color of the ink is changed by the above-mentioned procedure, it takes a lot of time to replace the new ink with no contamination or dilution. Not only that, but the amount of ink to be discarded as polluted ink at the initial stage of replacement reaches a considerable amount. Further, in the above-mentioned ink supply device, the drive source coupling 14 and the driven coupling 13 are adapted to be connected after being brought into correspondence with a predetermined meshing position. Is
This causes a problem that the coupling cannot be connected.

Further, since the ink supply blade 7 is integrally formed over the entire area of the ink source roller 6 in the axial direction, the inks in the lateral positions adjacent to each other are easily mixed with each other, which results in the print quality. There was also a problem that the value was significantly reduced. In addition, it is difficult to adjust the gap in the longitudinal direction of the blade 7, and the gap at the tip of the blade 7 varies in the longitudinal direction of the roller due to the hydraulic pressure during ink supply and the pressure (reaction force) during scraping. It is difficult to supply ink with a uniform film thickness over the entire area of the original roller 6 in the axial direction, and there is also a problem that light and shade on the printed surface occurs.

Further, when the ink supply device is attached or detached, there is a problem that the ink 2 is dropped and scattered from the ink supply nozzle 5, the ink supply blade 7 part, the pipe joint 33, etc., and the periphery of the device is contaminated. There is a problem that it takes a considerable time to attach and detach the pipe joint 33, and workability is poor and time is required for removing the residual ink in the ink supply nozzle 5, the ink supply blade 7, and the like.

An object of the present invention is to provide an ink supply device for a printing machine, which facilitates the treatment of residual ink associated with the ink replacement work, the cleaning and the mounting and removal work of the ink supply device, and the prevention of contamination of the surroundings. To provide.

[0019]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and the gist of the invention is to provide a printing machine in which a plurality of sets of ink supply devices are arranged side by side in the width direction. Among the members constituting the apparatus, at least an ink tank, an ink pump, an ink supply nozzle for ejecting ink onto the surface of the ink source roller, an ink supply pipe connecting the ink tank and the ink supply nozzle, and the above ink. The ink supply blade that adjusts the ink on the original roller to a predetermined thickness and the ink supply blade mechanism that includes the ink supply blade support member are not integrated into a unit, and the unit is detachably attached to the main body of the printing machine. The ink supply device of a printing press is characterized by the above.

According to the above means, the ink tank, the ink pump, the ink supply tube, the ink supply nozzle, and the ink supply blade mechanism which constitute the ink supply device are made as an integral unit and can be attached to and detached from the main body of the printing machine. Mixing of the ink at the position is prevented, and the ink supply unit can be attached and detached in a short time without polluting the periphery of the ink supply unit, and the color changing work and the cleaning work can be easily performed.

Further, preferably, an ink tank is installed below the ink supply nozzle and the ink supply blade mechanism. In this way, the surplus ink is completely collected in the lower ink tank, so that a higher effect of preventing the surrounding pollution can be obtained.

Another means of the present invention is to separate the above-mentioned ink supply blade mechanism from the above-mentioned unit to form a separate body,
It is configured to be detachably attached to the above unit or the main body of the printing machine. According to such a means, the ink supply blade mechanism, which is relatively easy to clean the residual ink, is provided separately from the above unit, so that it is possible to reduce the size and weight of the printing machine and facilitate the cleaning work. .

Further, in addition to either of the above two means, a driven coupling connected to the ink pump and a drive source coupling mounted on the main body of the printing press define the ink supply device. It is also a concrete means of the present invention that it is configured so that it can be automatically connected together with the setting to the position.

According to the above means, if the ink pump side coupling on the driven side is moved to a position where it is engaged with the coupling on the printer main body side set at a predetermined position, the spring and the engagement claw are moved. Both couplings are automatically engaged due to the cooperation with the As a result, when the ink supply device is attached to the main body of the printing machine, it is not necessary to previously match the phases of both couplings, unlike the conventional one, and the work of attaching the ink supply device is made efficient.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to FIGS.

FIG. 1 is a structural view of an ink supply device according to an embodiment of the present invention, FIG. 2 is a corresponding view of FIG. 1 showing another embodiment of the present invention, and FIGS. FIG. 6 is a view showing a coupling mode, and FIG. 6 is a front view of the ink supply device.

In FIG. 1, 3 is an ink pump, 4 is an ink supply pipe, 5 is an ink supply nozzle, 6 is an ink source roller, and 7 is an ink supply blade.

In the above ink supply device, the ink 2 filled in the ink tank 1 is sent to the ink supply pipe 4 via the ink pump 3, and the ink supply nozzle 5 at the tip of the ink supply pipe 4 causes the ink source roller 6 to flow. Is injected into. The ink source roller 6 is rotated while adhering the ink, and the ink 2 is supplied to the delivery roller 8 with a predetermined film thickness according to the gap between the ink supply blade 7 and the ink source roller 6. Then, a plurality of ink roller groups are sequentially transferred, and printing is performed via the blanket cylinder 9. The above configuration is the same as the conventional one.

As shown in FIG. 1, the ink supply device according to the embodiment of the present invention comprises the ink tank 1, the ink pump 3, the ink supply pipe 4, the ink supply nozzle 5, the ink supply blade 7 and the like as constituent elements. The ink supply device 100 is integrally formed as a unit, and the ink tank 1 is arranged below the drop-out portion of the excess ink in the ink supply blade 7 part and the ink supply nozzle 5 part. There is. The unitized ink supply device 100 is detachable from the main body of the printing machine.

In FIG. 1, an impeller 10 is provided below the ink tank 1. One end of a shaft 11 of the impeller 10 is penetrated to the outside of the ink tank 1, and both ends are bearings.
It is supported by 12a and 12b. With this, the impeller 10
Is restricted from moving in the axial direction. In addition, the bearings 12a, 12b
A seal is applied to the part to prevent ink leakage.

Reference numeral 14 is a drive source coupling connected to a drive source (not shown), and 13 is a driven coupling connected to the drive source coupling 14. The driven coupling 13 is attached to the shaft end of the shaft 11 via a key and a bolt so as to be movable in the axial direction and non-rotatable.

3 to 5 show the drive source coupling 1 described above.
4 and the driven coupling 13 are attached.

In the drive coupling 13 shown in FIG. 3, a sleeve-like clutch 131 having a plurality of concave and convex teeth is attached to the front end thereof. The structure is such that it cannot rotate with respect to the shaft 11 and can freely slide in the axial direction. Reference numeral 18 in the drawing denotes a compression spring, which biases the sleeve-shaped clutch 131 in the axial end direction. Reference numeral 19 denotes a retaining plate thickness of the clutch 131 fixed to the shaft end via a bolt 20. On the other hand, the main body side of the printing machine is fixedly equipped with a drive source coupling 14 having a groove 141 which is meshed with the concave and convex teeth on the front end of the clutch 131.

The ink supply device equipped with the above coupling is mounted at a predetermined position of the printing machine, and both couplings 13 and 14 are attached.
When the motor is rotated in a state where the axes of the couplings are aligned, first, the protruding tooth portion at the front end of the drive source coupling 14 slips by a phase shift amount and rotates, and the phases of both couplings 13 and 14 are aligned with each other. When the pressure reaches, the driven side coupling 13 moves toward the shaft end side by the pushing force of the compression spring 18, and the both couplings 13 and 14 are reliably connected. As a result, the rotational driving force is transmitted from the main body side to the ink pump 3 side.

In the driven coupling 13 shown in FIG. 4, a clutch 132 having several spline-like concavo-convex teeth formed on the outer periphery is attached to the end of the shaft 11, and the clutch 132 is a slip key. It is structured such that it cannot rotate with respect to the shaft 11 via 17 and can freely slide in the axial direction. The compression spring 18 causes the clutch 132
Is urged toward the shaft end. The structures and functions of the retaining plate 19 and the bolt 20 are the same as those in FIG. The tip of the convex portion of the clutch 132 is sharpened.

On the other hand, the drive source coupling 14 has
A groove that meshes with the uneven teeth on the outer circumference of the clutch 132 on its inner circumference
142 are formed.

Also in this case, as in the case of FIG. 3, the elastic force of the compression spring 18 moves the clutch 132 in the axial end direction to engage with the groove 142 of the drive source coupling 14.

In this case, since the tip of the convex portion of the clutch 132 is formed to have an acute angle, even if both convex portions come into contact with each other, due to the rotation of the drive side coupling 14, there is a large margin time for engagement. The clutch 132 and the groove 142 are securely fitted together.

In the embodiment shown in FIG. 5, the impeller 1
The driven coupling 13 attached to the shaft end of 0 is 1
It has a clutch 133 having a plurality of orbital pawls 21 in the circumferential direction. Reference numeral 19 in the drawing denotes a retaining plate for the clutch 133 fixed to the shaft end of the impeller 10 via a bolt 20. The swing claw 21 is configured to swing about a fulcrum shaft 22 by a predetermined angle. In addition, reference numeral 23 in the figure denotes a tension spring that is stretched between the swing claw 21 and the clutch 133, and is biased so as to cause the swing claw 21 to jump out in the circumferential direction.

On the other hand, the drive source coupling 14 on the main body side
Is formed in a cylindrical hole having a groove 143 that engages with the swing claw 21, and the inlet portion of the hole is tapered so that the inner diameter becomes smaller toward the inner side.

In the ink supply device provided with the coupling shown in FIG. 5, when the ink supply device is brought close to the couplings 13 and 14 with the axes of the couplings 13 and 14 aligned with each other, the swinging claw 21 is located on the main body side. The drive source coupling 14 fits into each other while being pushed toward the center of the shaft 11 along the taper formed at the front end of the drive source coupling 14. When the motor is rotated in this state, after slipping the phase shift amount, when the groove 143 of the drive source coupling 14 and the swinging pawl 21 of the driven coupling 13 are aligned, the elasticity of the tension spring 23 and the swinging pawl 21 The centrifugal force applied to the claw 21 causes the claw 21 to project outward in the diametrical direction. As a result, the couplings 13 and 14 are reliably connected to each other, and the rotational force can be transmitted.
Therefore, in this case, it is not necessary to slide the driven coupling 13 in the axial direction.

Next, the shaft end of the impeller 10 opposite to the driven coupling 13 is connected to the ink tank 1.
The ink pump 3 is connected to the side surface of the ink pump 3 and the discharge side of the ink pump 3 is connected to the nozzle 5 via the ink supply pipe 4. In FIG. 1, 15
Is a support attached to a part of the detachable unit via a bracket 16, and 7 is an ink supply blade fixed to the support 15.

In the above ink supply device, the ink is exchanged from the drive source coupling 14 to the driven coupling 13
Is attached and detached in the axial direction, that is, the entire integrally formed ink supply device is pulled out to the left side in FIG. 1 and then replaced with a new order ink supply device. The supply device is equipped with a positioning guide (not shown) so as to be surely guided to a predetermined position when mounted, and is also provided with an attachment / detachment lock mechanism to be fixed at the same position after position setting.

In the printing machine having the ink supply device constructed as described above, the ink supply device is mounted at a predetermined position, and the driven coupling 13 is fixed to the main body of the printing machine. Close engagement with the ring 14,
When the motor connected to the drive source coupling 14 is operated, the ink 2 in the ink tank 1 is scraped to the left side in FIG. 1 by the rotation of the impeller 10, and the ink supply pipe 4 and the nozzle are drawn from the suction port of the ink pump 3. It is supplied to the surface of the ink source roller 6 via 5.

In this embodiment, an ink tank 1, an ink pump 3, an ink supply pipe 4, an ink supply nozzle 5 and an ink supply blade 7 which constitute an ink supply device.
Etc. are integrally detachable as a unit, and are configured to drop and collect excess ink from the ink supply blade 7 and the ink supply nozzle 5 into the ink tank 1 provided below. In this case, it is possible to attach / detach the unit in a short time without polluting the periphery of the device.

When cleaning the ink 2 remaining on the ink supply nozzle 5 and the ink supply blade 7,
Place the above unit in a separate position away from the printer body,
Since it can be cleaned, it is safe, easy, and can be thoroughly cleaned in a short time.

FIG. 2 shows an ink supply device according to another embodiment of the present invention. In this embodiment,
The ink supply blade mechanism 70 including the ink supply blade 7, the support 15 and the bracket 16 has a separate structure, and the ink tank 1, the ink pump 3, and the ink supply pipe 4 are provided.
Also, the ink supply nozzle 5 and the like are integrally detachably configured as a unit, and excess ink from the supply blade 7 and the ink supply nozzle 5 is the same as in the above embodiment.
It is arranged so that it can be dropped and collected into the ink tank 1 provided below. As described above, the ink supply blade mechanism 70, which is configured separately, may be fixed to the main body of the printing machine or may be detachable from the main body of the printing machine.

In this embodiment, by separating the ink supply blade mechanism 70, which is relatively easy to clean, the size and weight of the printing machine can be reduced, and the work for attaching and detaching the ink supply device is facilitated. It Further, if the ink supply blade mechanism 70 has a structure that can be attached to and detached from the main body of the printing machine, the cleaning operation of the residual ink can be performed more easily as in the ink supply device.

The ink supply device according to each of the above embodiments is
Since the drive source coupling 14 and the driven coupling are automatically connected only by mounting the supply device at a predetermined position of the printing machine, the phase position of the pre-engagement portion is adjusted like the conventional one. There is no need to keep it, and the labor of ink replacement is greatly simplified.

The drive source coupling 14 and the driven side coupling 13 can be equipped with the drive source side and the driven side interchanged with each other, unlike the above embodiment.

[0051]

The present invention is configured as described above.
According to the present invention, since the main part of the ink supply device is unitized and can be attached to and detached from the main body of the printing machine, admixing of the ink supply device prevents the admixture of adjacent inks, and the contamination of the periphery of the device is prevented. Is prevented. Further, the cleaning work of the ink remaining on the ink supply nozzle and the ink supply blade portion becomes easy, and the work efficiency of the color changing work is improved.

Further, according to the second aspect of the invention, since the ink supply blade mechanism, which is relatively easy to clean the residual ink, is a separate unit, the printing machine can be further reduced in size and weight, and the cleaning work can be performed. And the workability when attaching and detaching the ink supply device is improved.

According to the third aspect of the present invention, both couplings are automatically made by merely abutting the motor side, ie, the drive side coupling on the main body side and the driven side coupling on the ink pump side. Since it can be combined, there is no need for the initial setting by phase matching like the conventional one,
Installation work efficiency of the ink supply device is improved.

[Brief description of drawings]

FIG. 1 is a structural diagram of an ink supply device according to an embodiment of the present invention.

FIG. 2 is a corresponding view of FIG. 1 showing another embodiment of the present invention.

FIG. 3 shows a first example of a coupling coupling portion of an ink supply device according to an embodiment of the present invention, (A) is an impeller side coupling, (B) is a Z arrow view of (A), C) shows a coupling on the printer body side.

FIG. 4 is a corresponding diagram of FIG. 3 showing a second example of the coupling coupling portion (however, (B) is a view seen from the arrow Y of (A)).

FIG. 5 is a correspondence diagram of FIG. 3 showing a third example of the coupling coupling portion (however, (B) is a view as seen from an arrow W in (A)).

FIG. 6 is a front view of the ink supply device.

FIG. 7 is a corresponding view of FIG. 1 showing a conventional ink supply device.

FIG. 8 is an overall configuration diagram of an offset rotary printing press.

[Explanation of symbols]

 1 ink tank 2 ink 3 ink pump 4 ink supply pipe 5 ink supply nozzle 6 ink source roller 7 ink supply blade 8 transfer roller 9 blanket cylinder 10 impeller 11 shaft 12, 12a, 12b bearing. 13 Driven Coupling 14 Drive Source Coupling 15 Support 16 Bracket 17 Slivey 18 Compression Spring 19 Locking Plate 20 Bolt 21 Swing Claw 22 Support Point Shaft 23 Tension Spring 24 Receiving Roller 25 Inking Roller 26 Plate 28 Plate Cylinder 30 Paper 31 doctor roller 32 scraping doctor 34 scraper 70 ink supply blade mechanism

Claims (3)

[Claims] 1. A printing machine comprising a plurality of sets of ink supply devices arranged side by side in the width direction, wherein at least an ink tank, an ink pump, and an ink source roller are provided among members constituting the ink supply device. An ink supply nozzle that sprays on the surface, an ink supply pipe that connects the ink tank and the ink supply nozzle, an ink supply blade that adjusts the ink on the ink source roller to a predetermined film thickness, and a support for the ink supply blade An ink supply device for a printing press, characterized in that the ink supply blade mechanism including members is integrated into a unit, and the unit is detachably attached to the main body of the printing press. 2. The ink supply device for a printing press according to claim 1, wherein the ink supply blade mechanism is separated from the unit to form a separate body, and the ink supply device is detachably attached to the unit or the main body of the printing press. 3. A driven coupling connected to the ink pump and a drive source coupling mounted on the printer body can automatically connect the ink supply device together with setting the ink supply device to a predetermined position. Claim 1 which consists of
Or an ink supply device for a printing machine according to any one of 2).