JPH0357827B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field to which the invention pertains] The present invention relates to a cyclone device for an air cleaner, and in particular to a cyclone tube type air cleaner device that is installed and used in construction machinery, etc. that operates in an atmosphere with a lot of dust. Regarding cyclone equipment.

[Prior art and its problems]

Generally, air cleaners are installed on construction machinery and used in environments where there is a lot of dust.
If only the filtration method using sponges or paper filters is used, the air cleaner element will become severely clogged.Therefore, conventional air cleaners are installed in multiple stages to remove sand grains from the air before the filtration method. A cyclone device is provided.

A conventional example is shown in FIGS. 1 and 2. In these figures, 100 indicates an air cleaner section,
Reference numeral 101 indicates a connecting pipe connected to the filtering type air cleaner. This air cleaner section 100 includes a case body 1 having a scavenging cylinder 3, and a case body 1.
It consists of an upper cover 4 as one of the engagement plates, a lower cover 5 as the other engagement plate, and a plurality of sand grain removal means 2 disposed at the upper and lower ends of the sand plate. This sand grain removal means 2 has swirl vanes 6 inside.
Cylindrical cyclone tube 6 with fixed A
and an air guide tube 7. The cyclone tube 6 is press-fitted into an opening 4A (see FIG. 3) provided in the upper lid 4,
In addition, during this press-fitting, as shown in FIG. 3, the protrusion 6B provided on the cyclone tube 6 and the notch 4B provided in the opening 4A are fitted, thereby preventing the rotation of the cyclone tube 6. movement is prevented. The air guide tube 7 has a smaller diameter than the cyclone tube 6, as shown in FIG. It is attached to the upper lid 4. Therefore, air taken into the engine (not shown) first flows into the cyclone tube 6 as indicated by arrow A in FIG. Because of this, it travels inside the cyclone tube 6 in a spiral shape. Therefore, the sand particles contained in the inflowing air move away from the center due to the centrifugal force caused by the swirling and gradually approach the inner wall, and eventually pass through the gap provided between the cyclone tube 6 and the air guide tube 7. It is diffused inside the air cleaner section 100. At this time, the air flowing out together with the sand grains is discharged to the outside from the scavenge cylinder 3 as shown by arrow B. On the other hand, air near the center flows into the air guide tube 7, becomes air containing almost no sand grains, and is sent to the next stage filtering type air cleaner (not shown) through the connecting pipe 101.

However, the cyclone tube 6
As mentioned above, since it is press-fitted to the top cover 4 and only has the protrusion 6B for preventing rotation, the top cover 4 may be damaged due to vibrations received during use.
If the connection between the cyclone tube 6 and the cyclone tube 6 becomes loose, and the protrusions provided on the cyclone tube 6 gradually wear out, or if an adhesive is used for this connection, the cyclone tube 6 may become loose. Since it is made of synthetic resin such as polypropylene, it is easily peeled off due to impact, etc., and as a result, the cyclone tube 6 rotates, significantly reducing its ability to remove sand grains, and also causing it to fall off. On the other hand, there have been disadvantages such as the process of providing the protrusions 6A and notches on the cyclone tube 6 and the top lid 4, respectively, or the assembling or fixing after application of adhesive takes time and effort. Furthermore, many of these inconveniences also occur between the air guide tube 7 and the lower lid 5.

[Purpose of the invention]

The present invention is a cyclone for an air cleaner that improves the disadvantages of the above-mentioned prior art, and makes it possible to easily and reliably fix a cyclone tube without providing any protrusions or notches, and to significantly improve its durability. The object is to provide a method for fixing the tube of the device.

[Summary of the invention]

Therefore, in the present invention, a plurality of predetermined tubes made of synthetic resin are individually arranged in the through holes of a pre-formed fastening plate, and one end of each tube is slightly protruded outward from the plate. After setting at least two of the protrusions in such a state, a heating mold is applied from the outside simultaneously to at least two of the protruding parts, and a part of the resulting molten synthetic resin flows out between each of the tubes. The purpose of the present invention is to achieve the above object by forming a fused portion that is integrated with each other.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on FIGS. 4 to 6.

In FIG. 4, 16 indicates a cyclone tube, and 16A indicates a swirling vane equipped on this cyclone tube 16. As shown in the figure, the cyclone tube 16 is fixed at its end to another adjacent cyclone tube 16 via a fused portion 20 serving as a connecting portion, and is secured to the upper lid 4. There is. The other configurations are the same as those of the conventional example described above.

Next, to explain this fastening method, in FIG. 5, 4 indicates the top cover as in the conventional example, and 16
indicates a cyclone tube, and 17 indicates a press mold. The cyclone tube 16 is formed with a stepped portion 16B so that the tip becomes narrower, and the cyclone tube 16 is connected to the opening 4 provided in the upper lid 4.
C, the stepped portion 1 is inserted as shown in the figure.
It comes into contact with 6B. The press die 17 has an inverted T-shape with a supporting portion 17C, and has two circular grooves 17A, 17A on the surface facing the supporting portion 17C, and a connecting groove 17B connecting the grooves 17A, 17A. It is engraved with, among them,
The diameter of the circle drawn inside the circular groove 17A is set to be approximately the same as or slightly larger than the inner diameter of the cyclone tube 16, and is configured to be concentric. Using this press die 17, the cyclone tube 16 is heated and melted as described above and attached to the upper lid 4. Specifically, the work will be carried out using the methods described below.

First, the cyclone tubes 16 are inserted into the adjacent openings 4C up to the stepped portions 16B. The pressing die 17 is heated to a temperature at which the base material of the cyclone tube 16 melts, and then pressed from the direction C shown in FIG. 5 to form the cyclone tube 1.
While melting the end portion of 6, the melted portion is inserted into the opening 4.
Spread around C. As a result, the molten part is
As a result, the melted portions of the two cyclone tubes 16 are eventually integrated to form a fused portion 20. When the press die 17 is rapidly cooled and removed from the cyclone tube 16, the sixth
As shown in the figure, two cyclone tubes 16 having connected engaging portions are constructed. By sequentially applying this engagement to the cyclone tube 16, the air cleaner shown in FIG. 4 described above is formed.

Furthermore, the same method as in the above embodiment can also be applied when the above-mentioned air guide tube 7 is attached to the lower lid 5.
It can be applied as is. FIG. 7 and FIG. 8 are examples of this case as seen from the air cleaner 101 side. In the figures, 7 indicates an air guide tube, and 30 indicates a fused portion as a connecting portion formed between the air guide tubes 7, 7. show.

In each of the above embodiments, the case where two cyclone tubes 16, 16, ... or two air guide tubes 7, 7, ... are connected to each other is illustrated, but the present invention is not necessarily limited to this, and three or more It may also be a method of concatenation.

〔Effect of the invention〕

As described above, according to the present invention, a plurality of predetermined tubes made of synthetic resin are respectively disposed in the through holes of a pre-formed fastening plate, and one end thereof is directed outward from the plate. After setting the tubes in a slightly protruding state, at least two of the protrusions are simultaneously pressed with a heating mold from the outside, and a portion of the resulting molten synthetic resin is poured into each of the tubes. Since the tubes are allowed to flow out between the two, thereby forming a fused portion that is integrated with the other, the tube can be easily and quickly fixed to the attachment plate, and the tube can be fixed to the attachment plate easily and quickly. It is possible to provide an unprecedented and excellent tube fixing method for a cyclone device for an air cleaner, which can significantly improve durability after attachment and improve productivity.

[Brief explanation of drawings]

Fig. 1 is a partially sectional front view showing a conventional example, Fig. 2 is a partially omitted plan view of Fig. 1, Fig. 3 is a partially enlarged view showing a part of Fig. 2, and Fig. 4 is A plan view showing a fixed part of a cyclone tube formed according to an embodiment of the present invention, FIG. 5 is an explanatory diagram showing a method of fixing the cyclone tube in FIG. 4, and FIG. FIG. 8 is an explanatory view showing the relationship between the cyclone tubes, and an explanatory view showing a fixed portion formed by applying an embodiment of the present invention in each of the air guide tube portions of FIGS. 7 and 8. FIG. 4...Top lid as one of the attachment plates, 5...
...Lower cover as the other engagement plate, 6, 16...
...Cyclone tube, 6A, 16A... Fixed swirl vane, 7... Air guide tube, 20, 30... Fusion part as a connecting part.

Claims (1)

[Claims] 1 A plurality of predetermined tubes made of synthetic resin,
They are formed in advance and arranged in each through-hole of the fastening plate, and one end of the fastening plate is set to slightly protrude outward from the plate, and then at least two of the protruding parts are At the same time, a heated pressing mold is pressed from the outside, and a part of the resulting molten synthetic resin flows out between the respective tubes, thereby forming a mutually integrated fusion part. A method for fixing a tube of a cyclone device for an air cleaner.