JPH04100845U - Dampening water supply device for printing presses - Google Patents

Abstract

(57) [Summary] [Purpose] To make it possible to change the capacity of a filter storage chamber divided into a water storage tank, and to appropriately increase or decrease the amount of filters depending on the degree of contamination of returned water. [Structure] A pair of outer partition plates 31 facing each other with an interval,
32, a pair of side plates 33, 34 that close between both ends of each of the outer partition plates 31, 32, an upper plate 35 that closes between the upper ends of each of the outer partition plates 31, 32, and each of the outer partition plates 31, 32. A partition device 30 consisting of an inner partition plate 36 interposed between the upper plate 35 and an inner partition plate 36 is provided, and hook portions 35a and 35b are extended from both ends of the upper plate 35 to be hooked to the opening edge of the water tank 2. The partition device 30 is movably attached by hooking the hook portions 35a and 35b to the opening edge of the water tank 2.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a dampening water supply device for printing presses that supplies dampening water to offset printing machines, etc. It is something to do.

0002

[Conventional technology]

In printing machines that use dampening water during printing, such as offset printing machines, the plate cylinder - A plate such as a PS plate attached to the outer circumferential surface of the It has a hydrophilic part. Ink is applied to the lipophilic part of the plate, and ink is applied to the lipophilic part of the plate. In other words, ink is applied only to the lipophilic parts that will be printed. After adhesion, the ink in the printed area is transferred to a rubber blanket and then It is printed on paper. Normally, dampening water is supplied from a dampening water supply device to the hydrophilic areas of the plate. Clean cooling water is applied.

0003 Figure 3 shows conventional printing equipment using this offset printing machine and dampening water supply device. It is shown.

0004 In the figure, 1 is a dampening water supply device, and 11 is an offset printing machine.

[0005] The dampening water supply device 1 includes a water storage tank 2 and a cooling circuit 3 that cools water W in the water storage tank 2. , a feed pipe 4 that supplies water W in the water storage tank 2 to the printing press 11, and A return pipe 5 that returns the water to the water storage tank 2, and a filter for filtering the return water arranged in the water storage tank 1. It is composed of a filter 6.

[0006] The water storage tank 2 has a box shape with an open top, and the outer surface is covered with a heat insulating material (not shown). It is covered with water and stores a predetermined amount of water W inside. In addition, the inside of the water tank 2 is divided into two chambers by a partition box 20, and a filter 6 is housed in the partition box 20. ing.

[0007] The cooling circuit 3 includes a compressor 3a, a condenser 3b, an expansion means 3c, and an evaporator 3. d in order and a cooling blower 3e facing the condenser 3b. An evaporator 3e that produces a cooling effect is disposed within the water storage tank 2.

[0008] The feed pipe 4 is equipped with a pump 4a, and is connected to the offset printing machine from the bottom of the water tank 2. The piping extends to 11 water vessels 11b. In addition, this feed pipe 4 has its ends connected to each other. It is branched so as to face the water boat 11b, and each branch end is equipped with an on-off valve 4b.

[0009] The return pipe 5 is connected to the overflow pipe of each water vessel 11b of the offset printing machine 11. The piping extends over the top surface of the router 6. This return pipe 5 has two inlets (main inlet and A Venturi tube 5a with a suction inlet) and one outlet is interposed, and the return tube 5 is Its suction inlet and outlet are connected. Moreover, at the main entrance of the Venturi tube 5a, One end of the circulation pipe 7 is connected to the lower side surface of the water tank 2, and the other end is connected via a pump 7a. It is continued. In other words, the water in the return pipe 5 passes through the circulation pipe 7 to the Venturi pipe 5a. When water is pumped into the main inlet of the main inlet, it is drawn in by the negative pressure created at the suction inlet and circulates. It flows into the water storage tank 2 together with the circulating water of the ring pipe 7.

0010 The filter 6 is constructed by stacking a plurality of filter materials 6a (five in the figure) in the vertical direction. It removes impurities from the water returned to the top surface through the return pipe 5 and purifies it. The converted water flows out through the partition box 20 to the other compartment side.

[0011] On the other hand, the offset printing machine 11 is composed of a plurality of printing mechanisms 11a corresponding to the number of colors. Each printing mechanism 11a is equipped with a water vessel 11b. of the previously mentioned version Dampening water is applied to the non-printing area (hydrophilic area) from this water vessel 11b using a water roller or the like. Supplied. In addition, each water vessel 11b is provided with an overflow pipe (not shown). The water that is no longer needed after being supplied flows into the return pipe 5 from the overflow pipe. It looks like this.

0012 In the above-mentioned printing equipment, the dampening water is cleaned and cooled through the feed pipe 4 of the dampening water supply device 1. While continuously supplying water W to each water vessel 11b of the offset printing machine 11, the printing machine At step 11, the water (dampening water) is supplied to the plate to perform desired printing. Also, printing machine The water that is no longer needed in step 11 is passed from the overflow pipe of each water vessel 11b to the return pipe 5. It is returned to the water storage tank 2 side, filtered by a filter 6, and reused.

[0013] Further, FIGS. 4 and 5 show details of the partition box 20 housed in the water tank 2. . The partition box 20 consists of a box with an open top, and most of the interior is used to accommodate filters. It is section 21. One end side of the filter accommodating portion 21 is connected to one side (side) of the partition box 20. board 22) and a first partition plate 23 that faces the board 22) at a distance. There is a gap between the cutting plate 23 and the bottom plate 24, and an opening 25 is formed on the lower end side of the side plate 22. Each is formed. Also, a part of the upper surface of the partition box 20, that is, the side plate 22 and the first partition The space between the upper end and the cutting plate 23 is closed by an upper plate 26. Furthermore, the side plate 22 and the first A second partition plate 27 whose lower end is in contact with the bottom plate 24 is interposed between the partition plate 23 and the partition plate 23 . , a gap is provided between the upper end of the second partition plate 27 and the upper plate 26.

[0014] According to this partition box 20, water flowing into the filter accommodating portion 21 is allowed to flow under the filter 6. The water flows out from the surface, passes through the gap in the first partition plate 23, and flows along the second partition plate 27. After meandering up and down, it flows out into the water storage tank 2 through the opening 25.

[0015]

[Problem that the idea aims to solve]

In the dampening water supply device 1, the amount of the filter 6 is appropriately reduced depending on the degree of contamination of the returned water. It is desirable to be able to do so. However, the filter of the partition box 20 Since the capacity of the filter housing section 21 is fixed, it is impossible to change the amount of filter 6. It was Noh.

[0016] This invention was made in view of the above problems, and its purpose is to: To provide a dampening water supply device for a printing press that can appropriately increase or decrease the amount of filter. It's there.

[0017]

[Means to solve the problem]

In order to achieve the above-mentioned purpose, the present invention provides a water tank and a supply of water in the water tank to the printing machine. A feed pipe that returns water that is no longer needed by the printing machine to the water tank, and a return pipe that returns water that is no longer needed by the printing machine to the water tank, and filters the return water. and a water storage tank with a filter storage chamber and a storage chamber for water filtered by the filter. In the dampening water supply device for a printing press, the dampening water supply device includes a partition means for partitioning the partition into a chamber and a partition. The means are movable.

[0018]

[Effect]

According to the dampening water supply device for a printing press of the present invention, by moving the partition means, The capacity of the filter storage chamber increases or decreases.

[0019]

【Example】

1 and 2 show an embodiment of the present invention. Furthermore, the dampening solution according to the present invention The supply device is basically the same as the conventional dampening water supply device shown in Fig. 3, except for the partition means. Therefore, in the embodiment shown below, reference will be made to FIG. 3, and the same parts will be referred to. 1 symbol will be used and the explanation thereof will be omitted.

[0020] In FIGS. 1 and 2, 30 is a partitioning device that partitions the inside of the water tank 2. As shown in FIG. this partition The device 30 includes a pair of outer partition plates 31 and 32 facing each other with an interval, and each outer partition plate 3. A pair of side plates 33, 34 that close between both ends of the panels 1, 32, and each outer partition plate 31, 32. It consists of an internal partition plate 35 interposed between. A water storage tank is located at the upper end of each side plate 33, 34. Hook portions 33a and 34a that are hooked to the opening edge of No. 2 extend respectively, and each hook portion 33 The distal end sides of a and 34a are bent downward along the wall surface of the water tank 2. Also, each outside The length of the partition plates 31 and 32 in the vertical direction is formed to be slightly shorter than the depth of the water tank 2, There is a gap between the lower end of each outer partition plate 31, 32 and the bottom of the water tank 2. There is. On the other hand, on the inner surface of each side plate 33, 34, a pair of opposing small pieces 36a, 36b and and 37a, 37b are provided, and between the small pieces 36a, 36b and between the small pieces 37a, 37b. By inserting both ends of the inner partition plate 35 between the inner partition plates 37b and 37b, the inner partition plate 35 can be attached and removed freely. In addition, the length of the internal partition plate 35 in the vertical direction is the water storage tank. 2, and its lower end is located at the bottom of water tank 2. Therefore, its upper end is located lower than each partition plate 31, 32.

[0021] The partition device 30 configured as described above connects the hooks 33a and 34a to the water tank 2. By hanging it on the edge of the opening, the inside of the water tank 2 is divided into two chambers, one of which has a flap. A filter storage chamber 40 is provided, and the other compartment is a water storage chamber 5 for water filtered by the filter 6. It becomes 0.

[0022] The water flowing into the upper surface of the filter 6 passes through each filter material 6a and passes through one of the outer partition plates. It flows into the inside of the partition device 30 from the lower end of 31 . The water that has flowed into the partition device 30 After meandering up and down along the inner partition plate 35, the water storage chamber is opened from the lower end of the other outer partition plate 32. 50.

[0023] In this way, according to the dampening water supply device for a printing press of this embodiment, the partition device 30 is pulled. It is attached by hooking the hanging parts 33a and 34a to the opening edge of the water tank 2. Because of this structure, the position of the partition device 30 can be easily changed. subordinate Therefore, the capacity of the filter storage chamber 40 can be easily increased by simply moving the position of the partition device 30. It is possible to change the amount of filter 6 and increase or decrease the amount of filter 6 as appropriate. Also, work The internal partition plate 35 of the cutting device 30 can be inserted and removed freely, so the internal partition plate 35 can be raised You can replace it with one with a different size to correspond to the water level in the partition device 30, or By shifting the vertical position of the internal partition plate 35, even if the water tank is moved to another water tank with a different depth. It also has the advantage of being versatile.

[0024]

[Effect of the idea]

As explained above, according to the dampening water supply device for printing presses of the present invention, the filter storage You can easily change the capacity of the chamber, so you can fill it according to how dirty the returned water is. It becomes possible to increase or decrease the amount of data as appropriate.

[Brief explanation of drawings]

[Fig. 1] A perspective view of the main parts of a dampening water supply device showing an embodiment of the present invention.

[Fig. 2] A sectional view of main parts of a dampening water supply device showing an embodiment of the present invention.

[Figure 3] Configuration diagram of printing equipment showing a conventional example

[Fig. 4] A perspective view of the main parts of a dampening water supply device showing a conventional example.

[Fig. 5] Cross-sectional view of main parts of a conventional dampening water supply device

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Dampening water supply device, 2... Water tank, 4... Feed pipe, 5... Return pipe, 6... Filter, 11... Offset printing machine, 30...
Partition device, 40...filter storage chamber, 50...water storage chamber

Claims (1)

[Scope of utility model registration request] [Claim 1] A water tank, a feed pipe that supplies water in the water tank to the printing press, a return pipe that returns water no longer needed by the printing machine to the water tank, a filter that filters the returned water, and a water storage tank. A dampening water supply device for a printing press comprising a partition means for partitioning the inside of the tank into a filter storage chamber and a storage chamber for water filtered by the filter, characterized in that the partition means is provided movably. A dampening water supply device for printing presses.