JP3158074B2 - Dust removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a dust removing device.

[0002]

2. Description of the Related Art As a dust removing device for removing dust adhering to a long sheet body such as paper, film, aluminum foil, etc., conventionally, as shown in FIG. Arranged so that body a draws an S shape and meanders,
It has been known that dust removal heads c and c having an ultrasonic air ejection port and a dust suction port are disposed near the outer peripheral surface of the rollers b and b.

[0003]

However, in the above-described conventional dust removing apparatus, the two rollers b, b and the two dust removing heads c, c are arranged at different places, and the sheet body a
However, there is a problem that a large installation space is required. Further, since a motor or the like for driving the roller b to rotate is required, there are problems that the number of parts increases and the structure becomes complicated.

[0004] Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a dust removing apparatus which has a simple structure and can be easily installed in a narrow space.

[0005]

In order to achieve the above-mentioned object, a dust removing apparatus according to the present invention is a dust removing apparatus for removing dust adhered to a long sheet traveling in a longitudinal direction,
A pair of dust removal heads having an upstream dust inlet and a downstream dust inlet, and a jet nozzle provided between the upstream dust inlet and the downstream dust inlet and jetting ultrasonic air,
The dust suction ports and the ejection nozzles are disposed on both sides of the long sheet body so as to be symmetrical, and the ejection nozzles are located downstream with respect to the long sheet body when viewed from the side. It is formed to be inclined.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments.

FIG. 1 and FIG. 2 are cross-sectional side views of an embodiment of a dust removing device according to the present invention. This device is applied to a long thin sheet 1 made of paper, film, aluminum foil or the like. This is for removing the adhered dust R, and is installed, for example, along a sheet member traveling path such as a winding machine for winding the long sheet member 1 or a printing machine for printing on the long sheet member 1. Thus, this dust removing device includes a pair of dust removing heads 2 and 2,
And a blower unit not shown.

The dust removing head 2 is provided between the upstream dust suction port 3 and the downstream dust suction port 4 and between the upstream dust suction port 3 and the downstream dust suction port 4 and emits ultrasonic air E. A jet nozzle 5. Then, a pair of dust removal heads 2 and 2 are provided on both sides of the long sheet body 1 with respective dust suction ports 3 and 2.
3, 4 and 4 and the ejection nozzles 5 and 5 are arranged so as to be symmetrical.

More specifically, the dust removing head 2 includes a casing 6 disposed in a direction perpendicular to the running direction of the long sheet 1, and an ultrasonic generator 12 provided in the casing 6.
And consisting of In the cross-sectional shape, the casing 6 has two negative pressure chambers 8, 8 on the upstream side and the downstream side partitioned by partition walls 7, 7 and a part between the two negative pressure chambers 8, 8. A rectangular cylindrical portion 10 made of an extruded material having a positive pressure chamber 9 located therein, and two negative pressure chambers 8 fixed to both ends of the rectangular cylindrical portion 10 and connected to each other and connected to each other with a positive pressure. And both end cap portions 11 and 11 for closing both end portions of the chamber 9. The above ultrasonic generator
12 is a block body having an ultrasonic generating hole 16 composed of a slit portion 14 and enlarged portions 15 and 15 formed in the middle of the slit portion 14, and is provided in the positive pressure chamber 9 of the rectangular cylindrical portion 10. It is fixed to the long sheet body 1 side so as to cover the entire longitudinal direction.

An air suction passage (not shown) for sucking air from the negative pressure chamber 8 is connected to the negative pressure chamber 8, and the positive pressure chamber 9 is provided with positive pressure air in the positive pressure chamber 9. An air supply path (not shown) for supplying is connected and connected. Then, air is supplied from the blower unit to the positive pressure chamber 9 via an air supply path, and the air in the negative pressure chamber 8 returns to the blower unit via an air suction path and a filter for dust removal. I have.

As shown in an enlarged view in FIG. 3, a slit-shaped jet nozzle 5 is provided on the outer wall of the ultrasonic generator 12 in the positive pressure chamber 9 on the side of the long sheet 1, and has a rectangular cylindrical portion 10. Is established over the entire length in the longitudinal direction. Further, the ejection nozzle 5 is formed to be inclined downstream with respect to the long sheet body 1 when viewed from the side. That is, the ultrasonic air E
Is configured to squirt diagonally downstream. Also,
The upstream-side dust suction port 3 and the downstream-side dust suction port 4 are formed on the outer wall portions of the upstream and downstream negative pressure chambers 8, 8 on the long sheet 1 side, over the entire length of the rectangular cylindrical portion 10 in the longitudinal direction. Is done. The dust inlets 3 and 4 are formed so as to gradually expand to the outside as viewed from the side.

Further, as shown in FIG.
On both surfaces of the caps 11, 11 on the sheet body 1 side, arcuate openings 17, 17 whose both ends are continuous with the upstream dust inlet 3 and the downstream dust inlet 4 are formed. The arcuate openings 17, 17 open oppositely at both ends of the pair of dust removal heads 2, 2.
(Return to FIG. 3) Concave portions 13, 13 are formed on the outer surface of the rectangular cylindrical portion 10 on the sheet body 1 side, on the side of the ejection nozzle 5 of the dust suction ports 3, 4. The distance B between the dust removing heads 2 and the long sheet 1 is set to 500 to 1500 μm.

Thus, high-speed (about 150 to 200 m / sec) ultrasonic air E, E is ejected from the ejection nozzles 5, 5 of each dust removal head 2, 2, and the dust suction ports 3, 3, 4,
Air is sucked into the negative pressure chambers 8. At this time, since the ejection nozzles 5 and 5 and the dust suction ports 3, 3, 4 and 4 are located symmetrically with respect to the long sheet 1, the air pressure between the heads 2 and 2 and the front and back surfaces of the sheet 1 is Are equivalent, and the sheet body 1 is located in a state of being floated at an intermediate portion between the heads 2, 2, and the sheet body 1 does not contact the dust removal heads 2, 2. Accordingly, the ejection of the ultrasonic air E, E from the ejection nozzles 5, 5 and the suction of the air from the dust suction ports 3, 3, 4, 4 are stabilized. Further, since the ejection nozzle 5 is inclined downstream with respect to the long sheet body 1 as viewed from the side, the sheet body 1 can be fed to the downstream side.

In general, a boundary layer is generated when air flows at a high speed on the surface of an object. According to this dust removing apparatus, the ultrasonic air E, E hits the front and back surfaces of the long sheet body 1 and thus the boundary layer is formed. The sheet is destroyed by the ultrasonic waves, and high-speed air directly hits the front and back surfaces of the sheet member 1, and the dust R is separated from the surface of the sheet member 1 by the effect of a so-called air knife. The separated dust R is carried by the air flow from the dust suction ports 3, 3, 4, and 4 into the negative pressure chambers 8, and further passes through an air suction path (not shown) to collect dust such as a filter. It is stored in. Thereby, dust R can be reliably removed from both front and back surfaces of the long sheet body 1.

Further, at both ends of the dust removing heads 2, 2,
Since the arc-shaped openings 17 are opened in opposition, the dust R separated from the sheet body 1 by the ultrasonic air E from the ejection nozzle 5
Can prevent the dust R from re-adhering to the sheet member 1 without scattering to the outside from both ends of the dust removing heads 2 and 2.

According to this dust removing apparatus, the gap between the long sheet 1 and the dust removing head 2 is kept constant without providing a roller for contacting the long sheet 1 or a motor for driving the roller. And the dust R can be simultaneously removed from the front and back surfaces of the long sheet 1. Therefore, the number of parts is reduced and the structure is simplified. And it can be easily installed even in a narrow installation space. Further, it can be easily added to an existing line such as a printing machine or a winding machine. Therefore, for example, if the plate roll is added to a gravure printing machine, dust can be prevented from adhering to the plate roll via the paper (long sheet body 1), and the life of the plate roll can be extended.

In FIG. 1 to FIG.
In some cases, both ends of each of the two negative pressure chambers 8 and the positive pressure chamber 9 therebetween may be closed by caps 11 at both ends.

[0018]

Since the present invention is configured as described above, the following effects can be obtained.

According to the dust removing device of the first aspect, the long sheet 1 and the pair of dust removing devices are not provided without auxiliary parts (such as a roller contacting the long sheet 1 and a motor for driving the roller). The gap between the heads 2 and 2 can be kept constant. Therefore, the number of parts is reduced and the structure is simplified. In addition, the dust R is simultaneously formed on both sides of the long sheet 1.
Can be removed. Furthermore, it can be easily installed even in a narrow space. In addition, since the dust removing device of the present invention can be added while the long sheet 1 is traveling in a plane (without meandering), it can be easily added to an existing line such as a printing machine or a winding machine. In addition, the ultrasonic air E, E from the jet nozzles 5, 5, the long sheet 1
Can be smoothly sent to the downstream side.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view of an embodiment of the present invention.

FIG. 2 is a bottom view of a main part.

FIG. 3 is an enlarged sectional side view of a main part.

FIG. 4 is a side view of a conventional example.

[Explanation of symbols]

 Reference Signs List 1 long sheet body 2 dust removal head 3 upstream dust suction port 4 downstream dust suction port 5 ejection nozzle E ultrasonic air R dust

Continuation of the front page (56) References JP-A-7-68226 (JP, A) JP-A-61-143687 (JP, U) Utility model registration 2567191 (JP, Y2) JP-B-42-21877 (JP, B1) JP-B 7-16660 (JP, B2) JP-B 7-25596 (JP, Y2) "CONTACT AND NON CONTACT CLEANING SYSTEMS FOR WEBS, SH EETS AND PARTS", Scientific Enterprises. Catalog (1986) (USA), P. 7 "SE WEB CLEANING SYSTEMS" Scientific Enterprises, InC. Catalog (1980) (USA), P. 2.4 Building equipment and plumbing, Nippon Kogyo Shuppan, March 1980, p. 81-82 (58) Field surveyed (Int. Cl. ⁷ , DB name) B08B 5/00 B08B 11/00

Claims (1)

(57) [Claims] 1. A dust removing device for removing dust R attached to a long sheet 1 traveling in a longitudinal direction, comprising: an upstream dust inlet 3, a downstream dust inlet 4, and an upstream dust inlet 3. A pair of dust removal heads 2, which are provided between the dust suction head 4 and the downstream side dust suction port 4 and which blow out the ultrasonic air E.
2 are disposed on both sides of the long sheet body 1 so that the dust suction ports 3, 3, 4, 4 and the ejection nozzles 5, 5 are symmetrical. A dust removing device, wherein the ejection nozzles 5 and 5 are formed to be inclined downstream with respect to the long sheet body 1.