JPH0122756B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus that performs dust removal and cleaning processing on various objects to be processed, such as cleaning and removing dust on printed circuit boards to prevent wire breaks and shorts prior to wiring printing.

Conventionally, in order to remove dust from an article, the surface of the article must be manually wiped, or, as shown in FIG.
After opening and closing the outlet door 33, the article A is artificially put in, and the blower 34 blows the recovered and purified air through the exhaust port 35 and the filter 36 onto the article A from the nozzle 37 to remove dust. A dust removal and cleaning device was used that was configured to eject the article A at the same time. However, all of these methods have disadvantages in that they rely on manual labor, resulting in poor processing efficiency, large variations in cleaning effectiveness, and the roughness of the dust removal cleaning process, making it impossible to perform a high degree of dust removal cleaning.

An object of the present invention is to provide an apparatus that can perform dust removal and cleaning processing continuously and efficiently, and can reliably perform a high degree of dust removal.

The characteristic configuration of the dust removal cleaning apparatus according to the present invention is that a driven conveyor is provided in the dust removal chamber to transfer the article to be processed from an entrance on one end side to an exit on the other end side, and a partition wall partitions the dust removal chamber in the transfer direction of the conveyor. A static elimination bar for removing static electricity from the objects to be processed and a rotationally driven brush for removing dust from the objects to be processed are installed in a part of the dust removal chamber section on the entrance side, and the remaining part is equipped with a static electricity removal bar similar to that described above. A bar and a gas circulation air supply device for spraying clean gas for dust removal onto the articles to be processed are provided respectively, and the air supply devices are arranged such that the internal pressure of the dust removal chamber section becomes higher toward the downstream side of the conveyor. The reason is that the pressure is higher than atmospheric pressure.

The effects of the characteristic configuration of the present invention are as follows. In other words, the article to be processed can be transferred from the inlet to the outlet by a driven conveyor, and
By raising the internal pressure of the dust removal chamber higher than atmospheric pressure using an air supply device and eliminating the need to open and close the inlet and outlet to prevent air from entering the dust removal chamber, the dust removal cleaning process can be performed continuously and manually. This has made it possible to eliminate or almost eliminate the need for dust removal and cleaning of large quantities of articles, making it possible to perform dust removal and cleaning extremely efficiently and uniformly.

Furthermore, the article is first strongly cleaned with a driven rotating brush in a state where static electricity has been removed, and then minutely cleaned with clean gas spraying in a state where static electricity has been removed.Furthermore, both of these cleaning processes are In addition, the internal pressure of the dust removal chamber section is made higher toward the downstream side of the conveyor using an air supply device, so that the removed dust flows into the other dust removal chamber section. By making it possible to eliminate the inconvenient phenomenon of adhering to the object again, it is possible to reliably remove all dust, including dust strongly adhering to the object and fine dust, resulting in an extremely high level of dust removal as a whole. Cleaning can now be done reliably and efficiently.

Next, an embodiment will be explained with reference to FIGS. 1 to 3.

A pair of left and right partition walls 4a,
4b is provided to form left and right air circulation chambers 5, 6, a dust removal chamber 7, and a blower storage chamber 8, and the dust removal chamber 7 and the blower storage chamber 8 are partitioned by a primary filter 9 whose mesh is not very narrow. Then, a path 12a for transferring the article to be processed A from an inlet 10 formed at one end of the case 3 to an outlet 11 formed at the other end of the case 3 is provided.
It is formed by a driven roller conveyor 12 provided in the case 3, and partition walls 13a and 13b are provided to divide the dust removal chamber 7 into three chambers in the transport direction of the roller conveyor 12, and a blower storage chamber 8 and air circulation chambers 5 and 6 are provided. Partition walls 14a, 14b, and 14c that partition the dust removal chamber into two chambers in the transport direction of the roller conveyor 12 are provided in series with the dust removal chamber partition partition wall 13b on the exit side. Note that a special rubber or the like that is resistant to ionized air is attached to the outer periphery of the roller conveyor 12.

A static elimination bar 15 configured to remove static electricity from the article A by ejecting ionized air by direct current discharge from a strip nozzle so as to act on the article A to be processed transferred by the roller conveyor 12.
a, 15b, 15c, and nozzles 16a, 16b, 16c for blowing clean air are provided in the dust removal chamber division portions 7a, 7b, 7c, respectively, and a rotating dust removal chamber is provided only in the dust removal chamber division portion 7a facing the entrance 10. Drive type brushes 17a, 17b are provided at the upper and lower sides of the path 12a, and one storage chamber section 8a is connected to the entrance side, the central dust removal chamber section 7a, 7b, and the left and right air circulation chamber section 5.
a, 6a, and the other storage chamber section 8b is communicated with the dust removal chamber section 7c on the exit side and the left and right air circulation chamber sections 5b, 6b, respectively. , 6b are each provided with a secondary filter 18 consisting of a high-performance filter, and a first blower 19a blows air from the inlet side and the central dust removal chamber section 7a, 7b to the primary and secondary filters. After cleaning in steps 9 and 18, the dust removal chamber on the exit side is sprayed again from the nozzles 16a and 16b onto the treated articles A in the dust removal chamber division portions 7a and 7b, and by the second blower 19b. After the air from the compartment 7c is purified by the primary and secondary filters 9, 18, it is configured to be blown again from the nozzle 16c onto the article A to be treated in the dust removal chamber compartment 7c. .
The brushes 17a and 17b are vertically adjustable and continuously variable.

Each of the nozzles 16a, 16b, 16c is attached so that the direction can be changed freely, and the nozzle 16a, 16
A flow rate control valve is attached to each of b and 16c, so that air is blown in a state suitable for removing dust from articles in each of the dust removal chamber sections 7a, 7b, and 7c, and the blown air is smoothly and evenly distributed to the primary filter. 9, and the internal pressure of the dust removal chamber section portions 7a, 7b, 7c is configured to be higher as it moves further down in the transfer direction of the roller conveyor 12, and is configured to be higher than atmospheric pressure. It has been done.

The parts of the partition walls 4a and 4b to which the roller conveyor 12 and the brushes 17a and 17b are attached are integrated into the case 3 with the roller drive and brush drive electric motors connected thereto, and the transmission cover 20.
In addition, an inspection opening having a grounded transparent lid 21 is formed on the upper surface of the case 3, so that processing can be easily performed when the object to be processed A becomes clogged. There is.

The electric motors for driving rollers, brushes, and blowers are each equipped with thermal relays and leakage preventers to automatically stop the entire device in the event of clogging of the processed article A, etc., and to prevent abnormalities. The system is configured to blink the notification light 22 to notify the occurrence of a trouble and the location of the trouble using a color display or the like.

A sensor for detecting the presence or absence of an object such as a photocell type is installed at the entrance 10.
When the sensor 23 detects the presence of the article A, the roller conveyor 12 and the brush 1 are immediately activated.
7a, 17b, blowers 19a, 19b, static elimination bars 15a, 15b, 15c, etc., and when the sensor 23 detects the absence of article A for a set period of time, appropriate measures are taken to ensure that article A does not remain in the device. It is configured to automatically stop the roller conveyor 12, brushes 17a, 17b, blowers 19a, 19b, static eliminating bars 15a, 15b, 15c, etc. at the appropriate timing.

Various operating tools and the above-mentioned automatic controllers for safety and power saving are centrally arranged in a detachable operation box 24, so that operations, repairs, inspections, etc. can be easily performed.

Next, another example will be shown.

Various types of conveyors 1 instead of roller conveyors
2 can be used, and a conveyor guide may be provided as appropriate depending on the size and shape of the article A.

The number of compartments in the dust removal chamber 7 may be plural, and when the dust removal chamber 7 is divided into three or more compartments, the brushes 17a, 1
The relationship between the number of parts provided with 7b and those not provided with 7b may be appropriately determined as necessary.

The type of clean gas to be sprayed onto the article to be treated A can be appropriately selected as necessary, and the specific configuration of the air supply devices 9, 19, 18, and 16 that circulate and supply gas to the dust removal chamber 7 can be freely changed. .

It is also possible to freely add a structure such as making the case 3 covered with a sound absorbing material to make it soundproof, or omit a part of the structure.

The type, shape, size, etc. of the article to be treated A are not limited, and it can be applied to, for example, biological cleaning of film sheets on a pharmaceutical packaging line.

[Brief explanation of drawings]

1 to 3 show embodiments of the present invention,
Figure 1 is a schematic longitudinal sectional view, Figure 2 is the same as in Figure 1.
3 is a sectional view taken along the line -- of FIG. 1. FIG. 4 is a schematic vertical sectional view of a conventional example. 7...Dust removal chamber, 7a, 7b, 7c...Dust removal chamber section, 9, 19, 18, 16, 9, 19b, 1
8b, 16b...Air supply device, 10...Inlet, 11
...Exit, 12...Conveyor, 13a, 13b...
...Partition wall, 15a, 15b, 15c...Static elimination bar,
17a, 17b...Brush.

Claims (1)

[Scope of Claims] 1. A drive type conveyor 12 is provided in the dust removal chamber 7 to transfer the article A to be processed from an inlet 10 at one end to an outlet 11 at the other end, and the dust removal chamber 7 is connected to the conveyor 1.
Partition walls 13a and 13b are provided to divide the dust removal chamber sections 7a, 7b, and 7c in the transfer direction of the dust removal chamber. Rotation-driven brushes 17a and 17b that remove dust from the processed article A,
In addition, the remaining parts 7b and 7c are provided with the same static eliminating bar 15 as described above.
b, 15c, and a gas circulation air supply device 9, 19, 1 that sprays clean gas for dust removal onto the article to be processed A.
8 and 16 are provided respectively, and front air supply devices 9, 19, 1 are provided.
8, 16 are the dust removal chamber partition portions 7a, 7b, 7.
The dust removal and cleaning device is characterized in that the internal pressure of c is higher on the downstream side of the conveyor 12 and higher than the atmospheric pressure. 2. A plurality of the air supply devices 9, 19, 18, 16 are provided, and a dedicated air supply device 9,
19b, 18b, and 16c are attached to the dust removal and cleaning device according to claim 1.