JP2573804Y2 - Dampening water supply nozzle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle structure in a damping device such as a web offset press for newspapers.

[0002]

2. Description of the Related Art FIG. 7 shows a layout of a conventional spray dampening apparatus. The fountain solution 41 in the fountain solution tank 40 is
The plurality of spray nozzles 3 are adjusted to the amount of water required for the control unit 37 by the control device 37 and attached to the tip of the spray bar 38.
9 is injected. The dampening solution sprayed from the nozzle 39 adheres to the water reciprocating roller 35 that can swing in the width direction, is sent from the dampening roller 36 to the plate 32 mounted on the plate cylinder 31, and forms a water film on the plate surface. The printing is performed so that the ink formed and supplied from another system does not adhere.

By the way, there are various spraying methods. For example, in the apparatus described in Japanese Patent Application Laid-Open No. H2-220846, this dampening water is sent to a spray nozzle means 51 from a water storage tank 61 by air pressure as shown in FIG. Can be On the other hand, the controlled air is sent from the air source 64 to the nozzle means 51 through the air panel 62 and to the water storage tank 61.
This nozzle structure is shown in FIG. The compressed air 56 is supplied to the atomizing air hole 60 and the flat blowing air hole 57 separately. Further, dampening water is supplied from 59 and spouted from a water spout 65 inside the atomizing air hole 60. This water jet nozzle 66
Is shown in FIG.

[0004]

The above-mentioned prior art has the following problems. 9 and 10, the water reciprocating roller does not sufficiently spread in the width direction, so that a large number of nozzles are required in the width direction. SUMMARY OF THE INVENTION It is an object of the present invention to provide a dampening solution supply nozzle in which a spray can spread laterally.

[0005]

[Means for Solving the Problems]

1. A V-shaped groove is cut at the tip of the nozzle from which water is jetted. 2. The V-shaped groove is defined as a direction (horizontal direction) perpendicular to a line connecting the air holes for flat blowing. 3. It is preferable that the tip of the V-shaped grooved nozzle protrudes from the atomizing air hole.

[0006]

[Action]

1. By cutting the V-shaped groove, the water flow that has flowed in the inside is also ejected to the outside from the V-shaped groove, forming a spray pattern that spreads more in the width direction. 2. By cutting the V-shaped groove in a direction perpendicular to the line connecting the flat-blowing air holes, the action of the flat-blowing air acts more synergistically, resulting in a spray pattern that spreads more in the width direction. 3. By extending the tip of the grooved nozzle outside the atomizing air holes, a spray pattern that spreads more laterally can be obtained.

[0007]

FIG. 1 shows the overall structure of the nozzle, FIG. 2 shows the nozzle viewed from the X side, and FIG. 3 shows the shape of the nozzle tip. 1 and 2
In, the supplied dampening water 8 is ejected from the water flow nozzle 1 which has become a cylindrical shape from a cone. Adjustment of the flow rate is performed by changing the flow path area by moving the needle 5 connected to the rotating ring 14 right and left. On the other hand, the atomizing air 6 is supplied onto the outer periphery of the water jet nozzle 1 and is jetted from the annular jet hole 3 around the nozzle to change the water jet from the water jet nozzle 1 into a mist. The spray pattern as it is is a so-called circular shape. Further, flat blowing air 7 is supplied, and the annular ejection holes 3 are formed.
Is injected from two flat blowing holes 4 provided outside the
The spray flow from the water jet port 2 having a circular spray pattern can be changed to an elliptical shape. FIG. 3 shows an enlarged view of the tip of the nozzle 1 in FIG. Fig. 3 shows the water outlet 2
A V-shaped groove 20 is cut along a line passing through the center of the nozzle, and a notch is provided on the side surface of the nozzle tip.

The shape of the groove 20 is not limited to a V-shape, but may be a U-shape as shown in FIG. 4 or a semicircle as shown in FIG. Further, a ring 21 is provided around the nozzle as shown in FIG. 6 by slightly protruding the tip of the nozzle from the atomizing air ejection hole 3 of the nozzle, and this ring is slid to the tip of the nozzle to form a V-shaped portion. It is also possible to make the area of the groove variable. In FIG. 1, 1
0 is the spray nozzle body, 11 support, 12 nut, 13
O-ring.

[0009]

According to the present invention, a dampening solution supply nozzle according to the present invention has a dampening solution passage provided with a water amount adjusting needle valve which can be moved back and forth in the center thereof, and a spray nozzle formed around a water outlet of the passage. In a spray nozzle having an air jet port and an air jet port for controlling a spray pattern at an upper and lower position opposite to the air jet port, the air jet port for controlling the spray pattern is provided at the tip of the water jet port. Providing the notch at a position rotated by 90 ° in the direction has the following effects. 1. Since the spray pattern from the nozzles can be formed into an elliptical shape, the number of nozzles provided in the roll direction can be reduced. 2. The control range of the elliptical spray pattern can be expanded. 3. Cost reduction can be achieved by reducing the number.

[Brief description of the drawings]

FIG. 1 is an overall sectional view of an embodiment of the present invention.

FIG. 2 is a view as viewed in the direction of arrows XX in FIG. 1;

FIG. 3 is an enlarged perspective view of a water jet port shown in FIG. 2;

FIG. 4 is a perspective view showing another shape of the water ejection port.

FIG. 5 is a perspective view showing another shape of the water jet port.

FIG. 6 is a perspective view showing another shape of the water jet port.

FIG. 7 is a layout view showing a conventional general spray system.

FIG. 8 is a conventional spray system diagram.

FIG. 9 is an overall sectional view of a conventional nozzle.

FIG. 10 is a perspective view of the water jet port shown in FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water flow nozzle 2 Water jet 3 Air jet for atomization 4 Air jet for flat blowing 20 Notch

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B41F 7/30 B05B 1/02-1/04

Claims (1)

(57) [Scope of request for utility model registration] 1. A dampening water passage having a water amount adjusting needle valve which can be moved back and forth in the center thereof, a spraying air outlet formed around a water outlet of the passage, and a In a spray nozzle having an air outlet for controlling a spray pattern at a vertically opposed position, a notch is formed at a tip of the water outlet at a position rotated by 90 ° in a circumferential direction with the air outlet for controlling the spray pattern. A dampening solution supply nozzle characterized by comprising: