JP2008062403A - Dampening arrangement and printing machine employing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water cistern, the removal of dust from which is made easier without making the structure of a device more complicated or more expensive. <P>SOLUTION: In a dampening arrangement 15, in which the water cistern 39, openly upwardly made of a bottom plate 55 and side panels 57 in a box type structure and in which dampening water is held, is detachably mounted to a blanket 73 fixed to frames 69 and 71, the top of the blanket 73 is provided with a mounting face 75 tiltingly formed downward towards a taking-out direction 53. The water cistern 39 has a shape following to the mounting face 75 and is equipped with a mounting part 65 detachably mounted to the mounting face 75. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fountain solution apparatus and a printing machine using the same.

The fountain solution device of the printing press draws up the dampening water held in the water boat by a water source roller that is partially immersed in the dampening water and rotates, and supplies the dampening water from the swim roller to the plate surface of the plate cylinder. Is.
During printing work, residual ink after transfer from the printing plate to the blanket cylinder, or dust such as paper dust transferred to the printing plate attached to the blanket cylinder, is transferred to the dampening device via the swim roller that contacts the printing plate. They are taken up and eventually accumulate in the water boat.
When this amount of dust increases, the supplied dampening water becomes dirty, and there is a risk of printing failure.
For this reason, it is required to regularly clean the inside of the water boat, but the conventional one has a structure that cannot be cleaned unless the dampening device is disassembled. The actual situation was that the water boats were not cleaned enough to clean them.

In order to solve this problem, for example, one disclosed in Patent Document 1 has been proposed.
This is a place where garbage is easily collected in the water boat, and a means for collecting the garbage is provided in this part, so that the dampening water supplied is prevented from becoming dirty by preventing the garbage from diffusing to other parts. is there.

Japanese Patent Laying-Open No. 2005-40949

However, the technique disclosed in Patent Document 1 has a problem that the size of the water boat increases and the manufacturing cost increases because of the addition of the recovery means.
Further, in order to remove the collected dust to the outside, it is necessary to disassemble the dampening water device, and there remains a problem that it is difficult to remove the dust.

  In view of the above problems, an object of the present invention is to provide a water boat and a printing machine using the water boat that can easily remove dust without increasing the complexity and cost of the device configuration.

In order to solve the above problems, the present invention employs the following means.
That is, the fountain solution device according to the present invention is formed in a box-type structure with the bottom plate and the side plate opened upward, and a water boat that holds the fountain solution inside can be attached to and detached from the mounting member fixed to the frame. The fountain solution apparatus is attached to the upper part of the attachment member, and is provided with an attachment surface formed so as to be inclined downward in the take-out direction. And an attachment portion that is detachably attached to the attachment surface.

According to the present invention, when the attachment portion of the water boat is detached from the attachment member, the water boat can freely move.
At this time, since the mounting surface of the mounting member is formed so as to incline downward toward the take-out direction, when the mounting portion having a shape along the mounting surface is guided to the mounting surface, the water boat moves toward the take-out direction. It can be moved obliquely downward.
Thus, if the water boat can move obliquely downward, the water boat can move so as not to contact the water source roller, so that the water boat can be moved in the take-out direction.
When the water boat is moved in the take-out direction, for example, at least a part of the water boat is separated from the lower part of the water source roller, so that the water boat can be easily cleaned.
Therefore, since the water boat can be cleaned in a short time, the water boat can be frequently cleaned, and the printing failure caused by the fountain solution can be reduced.
Further, since only the shape of the mounting member and the mounting portion is changed, the manufacturing cost can be substantially the same as the conventional one.

  In the dampening water device according to the present invention, a guide member for guiding the upper portion of the mounting portion is provided.

  As described above, since the guide member for guiding the upper portion of the attachment portion is provided, it is possible to reliably remove the fear that the water boat moves upward during the take-out and comes into contact with the water source roller.

  In the fountain solution apparatus according to the present invention, an inclined portion that is inclined downward toward the take-out direction is provided on the side opposite to the take-out direction of the bottom plate.

As described above, since the inclined portion that is inclined downward toward the extraction direction is provided on the side opposite to the extraction direction of the bottom plate, dust is guided to the inclination portion and accumulated on the extraction direction side of the water boat. become.
For this reason, when the water boat is taken out, garbage is collected in a portion away from the water source roller, so that the cleaning efficiency can be improved.

  In the fountain solution apparatus according to the present invention, the inclined portion is inclined at an angle equal to or greater than an inclination angle of the mounting surface.

Thus, since the inclined portion is inclined at an angle equal to or greater than the inclination angle of the mounting surface, when the water boat is moved along the mounting surface, the inclined portion moves below the extension line of the inclined portion. Never do.
For this reason, the lower space of a water boat can be used effectively.

  A printing press according to the present invention uses the fountain solution device according to any one of claims 1 to 4.

  Thus, since the water boat which can perform cleaning easily is used, cleaning can be performed frequently and the printing failure resulting from dampening water can be reduced.

According to the present invention, the upper part of the attachment member is provided with an attachment surface formed so as to be inclined downward toward the take-out direction, and the water boat has a shape along the attachment surface and is attached to and detached from the attachment surface. Since the attachment part which can be attached is provided, the water boat can be easily cleaned.
Therefore, since the water boat can be cleaned in a short time, the water boat can be frequently cleaned, and the printing failure caused by the fountain solution can be reduced.

Below, the sheet-fed printing press (printing machine) 1 concerning one Embodiment of this invention is demonstrated using FIGS.
FIG. 1 is a schematic diagram illustrating an overall schematic configuration of the sheet-fed printing press 1.
The sheet-fed printing machine 1 is provided with a paper feeding device 3, a plurality of printing units 5, and a paper discharge device 7 from the upstream side to the downstream side to which the sheet to be printed is supplied. .
The sheet feeding device 3 picks up and supplies the sheets 9 stacked on the sheet feeding table 11 one by one from the top by a known sheet feeding mechanism (not shown).
The paper feed table 11 is configured to move up in response to the supply of the sheet 9 so that the paper feed mechanism maintains a substantially constant positional relationship with the sheet 9.

  A plurality of printing units 5 are provided for each color to be printed. In the present embodiment, a four-color machine for printing with four colors consisting of C (cyan), M (magenta), Y (yellow), and BK (black) is shown, and four printing units 5 are provided. ing.

  Each printing unit 5 includes an inking device 13 for supplying ink, a fountain solution device 15 for supplying fountain solution, a plate cylinder 17 disposed opposite to the inking device 13 and the fountain solution device 15, A blanket cylinder 19 disposed opposite to the plate cylinder 17, an impression cylinder 21 disposed opposite to the blanket cylinder 19, and an intermediate cylinder 23 disposed between the impression cylinders 21 of the printing units 5 are provided.

FIG. 2 is an enlarged schematic view showing the inking device 13 and the fountain solution device 15.
The ink apparatus 13 includes an ink base roller 25, an ink key 27, a delivery roller 29, an ink form roller 31, and an ink kneading roller group.
The ink kneading roller group is configured by arranging a plurality of ink reciprocating rollers 33 and a plurality of ink kneading rollers 35 approximately alternately.

The ink reciprocating roller 33 is made of resin and is supported so as to be rotatable and slidable in the axial direction with respect to the frame. The ink reciprocating roller 33 is configured to be rotated at substantially the same peripheral speed as the peripheral surface of the plate cylinder 17 by a driving source (not shown) and to be reciprocated in the axial direction.
The ink kneading roller 35 has a rubber surface and is rotatably attached. The ink kneading roller 35 is configured to be rotated by these rollers when pressed against the ink reciprocating roller 33.

The ink form roller 31 has a rubber surface and is rotatably supported by the frame. The ink form roller 31 is configured to be rotated by being pressed against the ink reciprocating roller 33 and the plate cylinder 17.
The ink key 27 forms an ink reservoir 37 that holds ink with the ink base roller 25.

Ink is carried by the peripheral surface of the ink source roller 25 from the gap between the ink key 27 and the delivery roller 29 as the ink source roller 25 rotates.
The ink delivered to the delivery roller 29 is thinned and supplied to the ink form roller 31 while the large number of ink reciprocating rollers 33 and the ink kneading roller 35 are sequentially transferred.
The thinned ink supplied to the ink form roller 31 is supplied to the image line portion of the printing plate attached to the peripheral surface of the plate cylinder 17.

The fountain solution device 15 includes a water fountain 39 that holds the fountain solution, a water source roller 41 that pumps up the fountain solution of the water fountain 39, a rider roller 43 that adjusts the amount of the fountain solution, and a non-pressing plate. A wet roller 45 for supplying dampening water to the image line portion, a water retaining roller 47, and a bridge roller 49 connected to the inking device 13 are provided.
The fountain solution device 15 is provided on the paper feed side of the printing unit 5 as shown in FIGS. 1 and 2. Among them, the water boat 39 is disposed at the lowermost side of the fountain solution device 15 and at the end of the printing unit 5. That is, the water boat 39 is arranged facing the work space 51 for performing various operations provided between the printing units 5. The direction from the water boat 39 toward the adjacent work space 51 is the take-out direction 53 according to the present invention. (See Figure 2)
Hereinafter, the working space 51 side may be referred to as the outside, and the inside (plate cylinder 17) side of the printing unit 5 may be referred to as the inside.

3 and 4 are front views of the water boat 39 as viewed from the operation side. FIG. 3 shows a state when the water boat 39 is mounted, and FIG. 4 shows a state when the water boat 39 is taken out. FIG. 5 is an end view taken along the line XX of FIG. 6 is a plan view of FIG.
The water boat 39 is formed of a bottom plate 55 and side plates 57.
The bottom plate 55 is a steel plate material. The bottom plate 55 includes a substantially horizontal flat portion 59, an outer portion 61 formed by bending an outer portion of the flat portion 59 upward at a substantially right angle, and a front portion of the flat portion 59 inclined upward at an inclination angle α. And an inclined portion 63 formed by being bent in this manner.
The inner end portion of the inclined portion 63 is further bent upward. The inclined part 63 constitutes an inner wall for storing dampening water, and the outer part 61 constitutes an outer wall.

The side plate 57 is a steel plate material. The side plate 57 has a lower portion shaped like a bottom plate 55, an upper portion formed substantially horizontally inward from the upper end portion of the outer portion 61, and an inner end portion extending upward.
The side plates 57 and 57 are fixed to both sides of the bottom plate 55 by welding, and constitute side walls for storing dampening water.
Sponge 67 is affixed to the outer surfaces of the portions of the bottom plate 55 and the side plates 57 that constitute the portion for storing the dampening water.
The sponge 67 has a function of preventing condensation by preventing the low temperature of the water boat 39 cooled by dampening water of low temperature (for example, 6 ° C.) from propagating to the outside.

A portion of the side plate 57 located at the flat portion 59 extends downward, and the tip portion thereof is bent at a substantially right angle in a direction away from the bottom plate 55 to form an attachment portion 65.
The folding line of the attachment portion 65 is inclined at an inclination angle β so that the outer side becomes lower with respect to the horizontal direction.
A boss 67 for bolting is provided at the outer end of the mounting portion 65.
A water supply pipe and a drain pipe (not shown) are connected to the flat portion 59 of the bottom plate 55 in order to circulate and supply dampening water into the water boat 39.

Brackets (mounting members) 73 and 73 having a substantially rectangular shape are fixed to the operation side frame 69 and the drive side frame 71. The brackets 73 and 73 are attached so that the upper surfaces thereof are inclined at an inclination angle β so that the outer sides thereof are lower with respect to the horizontal direction.
The brackets 73, 73 on the side of the water boat 39 are notched to a thickness substantially equal to the thickness of the attachment portion 65, and an attachment surface 75 for attaching the attachment portion 65 is formed.
A bolt hole is formed in the outer end portion of the mounting surface 75, and the mounting portion 65 is placed on the mounting surface 75 and is fixed to the mounting surface 75 by a bolt 77.

A presser plate (guide member) 79 arranged so as to sandwich the attachment portion 65 from above is fixedly attached to the brackets 73 and 73.
The outer end of the pressing plate 79 is bent toward the outside and away from the attachment surface 75 so that it can be easily introduced when the attachment portion 65 is remounted.
The outer end of the holding plate 79 is set to the inner side of the bolt 77. However, this may be achieved by extending a portion engaging with the bolt 77 to a position equivalent to the outer end of the bracket 73. Good. If it carries out like this, the effect | action which restrict | limits the upward motion of the attaching part 65 can be performed longer.

The inclination angle α is formed to be slightly larger than the inclination angle β. The inclination angle α may be the same as the inclination angle β.
This is for effectively utilizing the lower space of the water boat 39 as will be described later. However, if this is not necessary, the inclination angle α may be made smaller than the inclination angle β.

  The plate cylinder 17 has a cylindrical shape in which a printing plate on which a printing image is formed is wound around the outer periphery. A printing plate is created and exchanged for each image to be printed. Although not shown, the plate cylinder 17 is in a state where a part of the angular range of the outer periphery is cut out in the axial direction, and at this position, the plate head which is the upstream end of the printing plate and the downstream side of the printing plate. A plate clamping device for holding and fixing the plate bottom as an end is provided.

The blanket cylinder 19 receives the ink on the printing plate of the plate cylinder 17 and transfers the ink to the sheet conveyed by the impression cylinder 21 and the intermediate cylinder 23 (offset printing). A blanket made of an elastic material such as rubber is wound around the outer periphery of the blanket cylinder 19. Although not shown, the blanket cylinder 19 is in a state in which a part of the angular range of the outer periphery is cut out in the axial direction, and a rubber clamp that holds and fixes the upstream end and the downstream end of the blanket at this position. A device is provided.
The blanket cylinder 19 is configured to be separated from the plate cylinder 17 when printing is not performed or the like.

The impression cylinder 21 is disposed opposite to the blanket cylinder 19 and has a cylindrical shape. The impression cylinder 21 is a so-called double cylinder having a diameter twice that of the plate cylinder 17 and the blanket cylinder 19.
On the peripheral surface of the impression cylinder 21, claw devices (not shown) for holding the front end of the sheet 9 are provided at two locations across the center of the axis. The impression cylinder 21 contacts the blanket cylinder 19 via the sheet during printing, and applies a desired pressure to the sheet 9 supplied between the impression cylinder 21 and the blanket cylinder 19. Thereby, the ink on the blanket cylinder 19 is transferred onto the sheet.

The intermediate cylinder 23 is provided between the impression cylinders 21 of the printing units 5 and has a cylindrical shape. The intermediate cylinder 23 is a so-called double cylinder having a diameter twice as large as that of the plate cylinder 17 and the blanket cylinder 19 except for the intermediate cylinder 23.
On the peripheral surface of the intermediate cylinder 23, claw devices (not shown) for holding the front end of the sheet 9 are provided at two positions with the axis center in between. The sheet 9 is fed from the upstream impression cylinder 21 to the downstream impression cylinder 21 by the intermediate cylinder 23.

The inking device 13, the dampening solution device 15, the plate cylinder 17, the blanket cylinder 19, the impression cylinder 21, and the intermediate cylinder 23 are provided on the sheet-fed printing press 1 so that their peripheral speeds are substantially the same. It is rotated by a main motor (not shown).
That is, the rotational force from the main motor is transmitted to each member via the gear.

The paper discharge device 7 includes a chain gripper 81 and a paper discharge table 83.
The chain gripper 81 circulates and moves between a position adjacent to the impression cylinder 21 of the final printing unit 5 and an upper position of the paper discharge table 83, a gripper bar connecting the chain, and a predetermined interval between the gripper bar. And a claw device installed at a distance, which receives the sheet 9 from the impression cylinder 21 and conveys it to a position above the sheet discharge table 83.
The paper discharge table 83 is configured to be movable in the vertical direction, and stacks and holds the sheets 9 discharged from the chain gripper 81.
Further, the paper discharge tray 83 is controlled so as to gradually move down so that the falling distance of the sheet 9 becomes substantially constant.

The operation of the sheet-fed printing press 1 according to the above-described embodiment will be described.
First, the printing operation of the sheet-fed printing press 1 will be described.
The thick sheets 9 stacked on the sheet feeding table 11 of the sheet feeding device 3 are taken out one by one from the top by a sheet feeding mechanism (not shown) and supplied to the printing unit 5.
The supplied sheet 9 is held by the nail device of the intermediate cylinder 23 of the printing unit 5, and then transferred from the intermediate cylinder 23 to the impression cylinder 21. This is repeated and conveyed through the four printing units 5.

In each printing unit 5, water is supplied from the dampening device 15 to the non-image area of the printing plate attached to the peripheral surface of the plate cylinder 17, and then ink is supplied from the ink supply device 13 to the image area of the printing plate. Supplied.
At this time, cold water, for example, dampening water with a water temperature of 6 ° C. is circulated in the water boat 39, but the portion of the water boat 39 that comes into contact with the dampening water is covered with the sponge 67, so the outside air is condensed. Never do. For this reason, the condensed water does not fall and cause a printing failure.
The printed image on the printing plate thus obtained is transferred to the blanket cylinder 19.
The printed image transferred to the blanket cylinder 19 is transferred to the sheet 9 conveyed by the impression cylinder 21 and printing of one color is performed.
This is repeated in each printing unit 5 for color printing.

The color-printed sheet 9 is replaced by the nail device of the chain gripper 89 from the impression cylinder 21 of the last printing unit 5.
The sheet 9 conveyed by the chain gripper 81 is removed from above the sheet discharge table 83, dropped, and stacked on the sheet discharge table 83.
At this time, powder is sprayed on the sheet 9 in order to prevent undried ink from appearing on the back of the upper sheet 9.

Next, the cleaning operation of the water boat 39 will be described.
When the printing operation is continued to some extent, residual ink after transfer from the printing plate to the blanket cylinder 19 and dust such as paper dust that has adhered to the blanket cylinder 19 and transferred to the printing plate passes through the swim roller 45 that contacts the printing plate. Then, they are taken into the fountain solution device 15 and finally accumulated in the water boat 39.
At this time, most of the dust deposited on the inclined portion 63 of the water boat 39 moves along the inclination of the inclined portion 63 and is collected in the flat portion 59. Accordingly, a large amount of dust is accumulated in the flat portion 59.

First, the water boat 39 is pressed, the bolt 77 is removed, and the engagement between the mounting portion 65 and the blanket 73 is released. Since the bolt 77 is located at the outer end of the water boat 39 and the boss 67 is interposed, the bolt 77 can be easily approached and removed.
In this state, when the force that supports the water boat 39 is loosened, the mounting portion 65 is guided by the mounting surface 75, and the water boat 39 moves in the take-out direction 53.
Since the attachment surface 75 is inclined so as to be lowered in the take-out direction 53, the water boat 39 moves obliquely downward along the inclination angle β.

At this time, since the inclined portion 63 is inclined by an inclination angle α substantially equal to the inclination angle β, the inclined portion 63 moves along its substantially extended line 85. For this reason, the inclined portion 63 does not come into contact with the water source roller 41 while the water boat 39 is moving.
Therefore, when viewed from the relationship with the water source roller 41, it is preferable that the inclination angle α is not much larger than the inclination angle β.
In addition, since the inclined portion 63 is not positioned below the extension line 85 and is not guided by the mounting surface 75 to move straight down, other devices, up to the limit of the extension line 85, For example, it can be used for the arrangement of a blanket cleaning device or the like, and the lower space of the water boat 39 can be used effectively.
Since the presser plate 79 is guided in close contact with the upper portion of the attachment portion 65, the attachment portion 65 is prevented from moving upward. For this reason, it is possible to reliably remove the fear that the water boat moves upward during take-out and comes into contact with the water source roller 41.

  For example, as shown in FIG. 4, the water boat 39 is supported with the blanket 73 partially holding the weight of the water boat 39 immediately before the inner end of the mounting portion 65 is detached from the mounting surface 75. . In this state, most of the flat portion 59 where dust is accumulated is located at a position not covered by the water source roller 41, so that cleaning for collecting dust can be performed.

  When the cleaning is completed, the water boat 39 is pushed up with the mounting portion 65 of the water boat 39 along the mounting surface 75 and fixed with the bolt 77 in a state where the water boat 39 has reached a predetermined position.

As described above, the water boat 39 can be moved to a position where the water boat 39 can be cleaned simply by removing the bolt 77 and allowing the mounting portion 65 to be guided by the mounting surface 75. It can be carried out.
For this reason, since cleaning can be performed frequently, the printing failure resulting from dampening water can be reduced.
Further, since only the shapes of the blanket 73 and the mounting portion 65 are changed, the manufacturing cost can be substantially the same as the conventional one, which is economical.

Here, the cleaning operation is performed with the water boat 39 engaged with the blanket 73, but the water boat 39 may be taken out to perform the cleaning operation.
That is, in the state of FIG. 4, the attachment portion 65 is detached from the push plate 79, and if it is moved a little further downward, it becomes free from the blanket 73. Can be removed while being swept so as not to contact the water source roller 41.

In addition, this invention is not limited to this embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.
In this embodiment, the present invention is applied to a sheet-fed printing machine, but the present invention can be applied to a printing machine of an appropriate type such as a rotary printing machine.

1 is a front view showing an overall schematic configuration of a sheet-fed printing press according to an embodiment of the present invention. It is a front view which shows the upper structure of the printing unit concerning one Embodiment of this invention. It is the front view seen from the operation side of the water boat concerning one Embodiment of this invention. It is the front view seen from the operation side which shows the state during the cleaning operation | work of the water boat concerning one Embodiment of this invention. It is XX end elevation of FIG. FIG. 4 is a plan view of FIG. 3.

Explanation of symbols

1 sheet-fed printing machine 15 dampening device 39 water boat 53 take-out direction 55 bottom plate 57 side plate 63 inclined portion 65 mounting portion 69 operation side frame 71 driving side frame 73 blanket 75 mounting surface 79 push plate

Claims (5)

A dampening device that is formed in a box-type structure with the bottom plate and side plates open upward, and in which a water boat holding dampening water is removably attached to a mounting member fixed to a frame. ,
The upper part of the mounting member is provided with a mounting surface formed so as to be inclined downward toward the take-out direction,
The dampening water device is characterized in that the water boat is provided with an attachment portion that is shaped along the attachment surface and is detachably attached to the attachment surface.   The fountain solution device according to claim 1, further comprising a guide member for guiding an upper portion of the attachment portion.   The fountain solution apparatus according to claim 1, wherein an inclined portion that is inclined downward toward the take-out direction is provided on a side opposite to the take-out direction of the bottom plate. .   The fountain solution device according to any one of claims 1 to 3, wherein the inclined portion is inclined at an angle equal to or greater than an inclination angle of the mounting surface. A printing machine using the fountain solution device according to any one of claims 1 to 4.

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