JP3047815U - Jig for adjusting dampening water - Google Patents

Abstract

(57) [Summary] [Problem] When supplying dampening water to a dampening roller or the like that applies dampening water to a printing plate surface, troublesome adjustment work can be eliminated,
Provided is a dampening water adjusting jig that enables appropriate supply of dampening water. SOLUTION: A dampening solution adjusting jig 30 is provided between a spray nozzle 22 and a call roller 23, and the dampening solution adjusting jig 30 includes a support block 31 extending in the axial direction of the roller. And a shielding pin 33 which is removably inserted into a plurality of insertion holes 32 provided at a predetermined pitch interval on the upper surface of the support block 31, and the dampening water from the spray nozzle 22 is supplied to the calling roller 23. When ejecting, the shielding pin 3 is removed by inserting and removing the shielding pin 33.
The supply amount of dampening water is adjusted using the shielding effect of 3.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a dampening device for applying dampening water to the plate surface of a lithographic printing press, and in particular, a dampening water adjusting jig installed in the dampening device so that the supply amount of dampening water can be properly adjusted. About.

[0002]

[Prior art]

 For example, in a lithographic offset printing press, as shown in FIG. 5, an appropriate amount of water (hereinafter, referred to as dampening water) is applied from a dampening device 2 to a plate surface of a plate cylinder 1 of the printing press. Prevents ink from adhering to the lines.

[0003] The role of this dampening solution is: Prevention of ink adhesion to non-image areas. Cleaning of non-image area. Clean image area. Prevent change of image area. The plate temperature is kept constant.

The dampening device 2 has a configuration in which a spray nozzle 3 sucks up dampening water, blows air from a blower (not shown) through an air passage 4 to an outlet 3 a of the spray nozzle 3, and a call roller 5 a The dampening solution is supplied by spraying water onto the plate roller 1, and the dampening roller 5c is supplied with water through the vibration roller 5b, so that the dampening solution is supplied to the plate surface of the plate cylinder 1.

When printing is performed, the supply of water to the plate surface is adjusted to be small except where the paper passes, and the method of adjusting the amount of dampening water supplied by the spraying method is to adjust the supply of dampening water to the spray nozzle 3 that sucks up water. This is done by adjusting the air pressure.

That is, as shown in FIGS. 6 and 7, in a type in which seven nozzles form one block and three blocks are set, the regulators 6a, 6a, 6b and 6c are set, and for each of the blocks a, b and c, after operating the regulator pressure by the regulator 6, the direction of the air amount adjusting knob 7 for directly injecting air to the spray nozzle 3 is changed. I do it.

Accordingly, when the paper width of the paper P on which the printing is performed has the dimensions shown in the drawing, the regulators 6a and 6b of the blocks a and b are operated to increase the regulator pressure, and the regulator 6c of the block c reduces the regulator pressure. After the above operation, the air amount adjusting knob 7 of the block a is further fully opened with respect to the air amount adjusting knob 7, and the air amount adjusting knob 7 of the block b is located at the portion where the paper P passes, that is, the right half portion in the figure. The air amount adjustment knob 7 is fully opened, the remaining left half is operated by operating the air amount adjustment knob 7 to reduce the air amount, and the air amount adjustment knobs 7 of the block c are all weakened.

[0008]

[Problems to be solved by the invention]

 As described above, in the conventional dampening device 2, in order to adjust the supply amount of dampening solution corresponding to the width of the paper P at the time of printing, two operations of the regulator pressure operation and the air amount adjustment knob operation are performed. It is necessary to be skillful, and it is necessary to frequently adjust the regulator pressure and air volume, which makes it very difficult.

When the supply amount of dampening solution is inappropriate, for example, when there is too much dampening solution, there is a problem of emulsification and ink scattering. When there is little dampening solution, it is used as a vibration roller. The surface of the roller, such as a Molton roller or a sleeve felt roller, is liable to be stained, and troublesome maintenance work such as cleaning and rewinding of the Molton (cotton cloth) or the sleeve felt is required.

[0010] The present invention has been made in view of such circumstances, and it is possible to appropriately supply dampening water to the plate surface of the plate cylinder in accordance with the sheet width at the time of printing, and furthermore, it requires skill. It is an object of the present invention to provide a dampening solution adjusting jig that can easily and properly supply a dampening solution in a short time without performing.

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a dampening device that sucks up dampening water by a spray nozzle, sprays dampening water to a pulverizing roller, and supplies dampening water to a printing plate surface via a dampening roller. In the jig for adjusting dampening water installed in the apparatus, the jig for adjusting dampening water includes a support block installed between a spray nozzle and a calling roller, and a predetermined pitch on an upper surface of the support block. It consists of a shielding pin that can be inserted and removed freely into insertion holes that are opened at intervals, and when dampening water is sprayed from the spray nozzle to the calling roller, the damping water is removed by inserting and removing the shielding pin. It is characterized in that the supply amount is adjusted.

[0012] Here, the dampening solution adjusting jig is installed between the dampening solution spray nozzle and the recall roller, and the dampening solution supplied to the recall roller passes through a vibration roller and a dampening roller. The dampening solution is applied to the plate surface of the plate cylinder.

The fountain solution adjusting jig can be freely inserted and removed into a rectangular parallelepiped support block extending in the axial direction of the roller and an insertion hole formed at a predetermined pitch interval on the upper surface of the support block. It consists of a shielding pin to be inserted, and a large number of planted shielding pins shield the dampening water from the spray nozzle to adjust the dampening water supply.

The support block and the shielding pin are preferably made of a metal material from the viewpoint of processing, strength, and the like. Particularly, in consideration of rust resistance, materials such as brass and stainless steel are suitable. In addition, the external dimensions of the support block, the diameter and pitch of the insertion hole, and the length and diameter of the shielding pin shall be changed appropriately.

[0015] As is apparent from the above configuration, in accordance with the paper width at the time of printing, a portion through which the paper passes does not include a shielding pin inserted into the support block. When the dampening water is injected from the spray nozzle by inserting the pin, the dampening water can be supplied appropriately, and the cumbersome adjustments such as adjusting the regulator pressure and adjusting the air volume adjustment knob as before are required. No work is required.

[0016]

[Embodiment of the invention]

 Hereinafter, an embodiment of a dampening solution adjusting jig according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an explanatory view showing an entire configuration of a dampening device provided with a dampening solution adjusting jig according to the present invention. FIG. 2 is a perspective view of the dampening solution adjusting jig according to the present invention. FIG. 3 is an explanatory view of the configuration of the dampening solution adjusting jig, and FIG.

Referring to FIG. 1, the overall structure of the dampening apparatus will be described. Ink attached to the plate cylinder 10 used for lithographic offset printing is transferred to the blanket cylinder 11, and the ink is transferred between the blanket cylinder 11 and the impression cylinder 12. The paper P is fed to the printer and desired printing is performed.

The dampening device 20 that applies dampening water to the plate surface of the plate cylinder 10 includes a spray nozzle 22 that sucks up and jets dampening water from a watercraft 21 and a nozzle port 22 a of the spray nozzle 22. A plurality of roller groups for supplying the jetted dampening water to the plate cylinder 10, namely, a blow roller 23, a vibration roller 24, a dipping roller 25, and air is blown to a nozzle port 22a of the spray nozzle 22. It comprises an air passage 26 to be attached, a regulator pressure adjuster 27 capable of adjusting the air pressure at this time, and an air amount adjusting knob 28.

The feature of the present invention is that a dampening solution adjusting jig 30 is connected to the spray nozzle 22 so that a proper amount of dampening solution can be sprayed from the spray nozzle 22 to the roller groups 23, 24 and 25. It is characterized by being installed between the call roller 23.

The dampening solution adjusting jig 30 is accommodated and installed in the watercraft 21, and has a rectangular parallelepiped support block 31 extending along the axial direction of the call roller 23, and a predetermined pitch interval on the upper surface of the support block 31. And a shielding pin 33 which is inserted into a large number of insertion holes 32 so as to be freely inserted and removed.

That is, as shown in FIG. 2, after dampening water is sucked up from the watercraft 21 by the spray nozzle 22, the dampening water is jetted to the call roller 23 by the air pressure from the air outlet 26 a. In addition, the supply amount of dampening water is adjusted by the shielding effect of the shielding pin 33.

Further, as shown in FIG. 3, in this embodiment, the supporting block 31 of the dampening solution adjusting jig 30 has a length × width × depth of 20 × 100 × 20 (mm). However, the length may be set appropriately between a vertical dimension of 10 to 30 mm, a horizontal dimension of 50 to 200 mm, and a depth dimension of 10 to 30 mm, and the diameter of the insertion hole 32 formed at a predetermined pitch interval on the upper surface of the support block 31 is 2. Although the pitch interval is set to 2 mm at 5 mm, The pin interval may be set in the range of 1.0 to 3.0 mm at a diameter of 5 to 3.5 mm. The length of the shielding pin 33 inserted into the insertion hole 32 is 50 mm in the present embodiment. , Between 40 and 60 mm.

Further, as the material of the support block 31 and the shielding pin 33, a metal material is suitable in terms of strength and working surface, and is particularly preferable in terms of rust resistance, such as brass and stainless steel.

Therefore, in order to use the dampening solution adjusting jig 30 according to the present invention, as shown in FIG. 4, the regulator pressure adjuster 27 and the air amount adjusting knob 28 all need to be fully opened and need to be operated. There is no. Then, corresponding to the width of the printing paper P, the places where the paper P passes do not insert the shielding pin 33 into the support block 31 and the places where the paper P does not pass, that is, the places where the dampening water is hardly needed. By inserting the shielding pin 33 into the support block 31, the dampening solution from the spray nozzle 22 is shielded by the shielding pin 33 and the damping solution is hardly supplied to the rollers 23, 24 and 25. What should I do?

As described above, according to the present invention, it is only necessary to perform the insertion operation of the shielding pin 33 corresponding to the paper P size, and it is necessary to operate the regulator pressure regulator 27 and the air amount adjustment knob 28 which are required conventionally. The troublesome adjustment work, such as the operation of, can be eliminated, the dampening solution can be supplied with high accuracy even to non-experts in a short time, the workability is improved, and the emulsification phenomenon and ink scattering can be prevented. The surface of the used Moulton roller or sleeve felt roller can be prevented from being stained, so that accurate printing can be performed, and the maintenance can be improved without frequent and troublesome work such as cleaning and rewinding.

[0027]

[Effect of the invention]

 As described above, the dampening solution adjusting jig according to the present invention has the following special effects.

(1) According to the present invention, when supplying dampening water from the spray nozzle to the calling roller or the like, the supply amount of dampening water can be adjusted only by removing and inserting the shielding pin. As a result, troublesome adjustment operations requiring skill, such as the operation of adjusting the regulator pressure and adjusting the air amount, as in the past, can be eliminated, and even non-experts can supply appropriate dampening water in a short time. This has the effect that the properties are significantly improved.

(2) According to the present invention, when supplying dampening water from the spray nozzle to the recall roller or the like, the supply amount of dampening water is adjusted by inserting and removing a shielding pin from the support block. Therefore, it is possible to supply the dampening solution with high accuracy, and to prevent the emulsification phenomenon and ink scattering when the dampening solution is excessive, the moleton on the surface of the vibration roller and the sleeve stain when the dampening solution is small. This has the effect that printing can be performed with high accuracy and maintenance of the rollers can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing the entire configuration of a dampening device provided with a dampening solution adjusting jig according to the present invention.

FIG. 2 is an explanatory view showing one embodiment of a dampening solution adjusting jig according to the present invention.

FIG. 3 is a perspective view showing a configuration of the dampening solution adjusting jig.

FIG. 4 is an explanatory view showing a usage form of the dampening solution adjusting jig.

FIG. 5 is an explanatory view showing the entire configuration of a conventional dampening device.

FIG. 6 is an explanatory view showing a conventional dampening solution adjusting method.

FIG. 7 is an explanatory view showing a conventional dampening solution adjusting method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Plate cylinder 11 Blanket cylinder 12 Impression cylinder 20 Dampening device 22 Spray nozzle 23 Calling roller 24 Vibration roller 25 Watering roller 26 Air passage 27 Regulator pressure regulator 28 Air volume adjusting knob 30 Jig for adjusting dampening water 31 Support Block 32 insertion hole 33 shielding pin P paper

Claims (1)

[Utility model registration claims] 1. A dampening solution is sucked up by a spray nozzle,
A dampening water adjusting jig installed in a dampening device for injecting dampening water into a call roller and applying dampening water to a plate surface of a printing press via a dampening roller; Is composed of a support block installed between the spray nozzle and the call roller, and a shielding pin that is removably inserted into insertion holes formed at predetermined pitch intervals on the upper surface of the support block, A dampening water adjusting jig, wherein a dampening water supply amount is adjusted by inserting and removing a shielding pin when spraying dampening water from a mounting nozzle to a calling roller.