JPH0315127Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention is a fuel tank filtration method in which a filter made of a porous material is provided at the lower end of a fuel pipe that penetrates the wall of the fuel tank and communicates with the carburetor. It is related to the device.

(b) Prior Art and Problems to be Solved Conventionally, in this type of fuel tank filtration device, the filter filters minute impurities in the fuel and has a high filtration performance in order to supply clean fuel to the carburetor. Porous materials such as felt are used as filter materials with good properties. With this structure, when the filter filters fuel and moves through the fuel tank with impurities attached to the filter surface, the impurities on the filter surface are pressed and fixed by the bottom of the fuel tank, which causes the filter surface to become clogged. Eventually, the engine will not be able to suck in the amount of fuel it requires, which will cause the engine to malfunction. For this reason, it is difficult to remove impurities that adhere to the surface of the filter during cleaning, and it has not been possible to completely clean the filter.

(c) Means and effects for solving the problems The present invention is provided with a filter cover that covers the outer periphery of the filter and is provided with a communication passage that communicates with the outer periphery of the filter. According to the present invention, when the filtration device moves inside the fuel tank, the filter is protected by the filter cover and does not rub against the inner wall of the fuel tank, so there is no pressure on impurities that cause clogging, and the engine is protected. Necessary fuel can be supplied, impurities adhering to the filter can be easily removed by washing, and the structure is simple, disassembly and assembly are easy, and the filter is easy to clean.

(d) Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. 1 to 4, a fuel pipe 25 is provided through an insert 21 made of an elastic material that fits into a hole 19 opening in the wall of the fuel tank 17. As shown in FIGS. The fuel pipe 25 is set to a length necessary to freely move within the fuel tank 17, and has a filter 27 inserted into its tip and fixed with a snap spring 29. The filter 27 is constructed as follows. That is, the filter 31 for filtering impurities is formed into a columnar shape using a porous material such as felt material, and includes a disc-shaped weight 33 made of a metal material and a connection inserted into the fuel pipe 25 in the center of the disc. A locking groove is sandwiched between a main body 37 that communicates with the pipe portion 35, is formed in the shape of a metal band plate bent into a U-shape, and has both ends provided on the outer periphery of the main body 37. It is fixed by a fixing member 39 that is engaged with 38 . A hole 41 that connects the filter 31 and the fuel pipe 25 is provided through the main body 37 . Filter 31
The filter cover 43 that covers the outer periphery of the fuel pipe 25 is formed into a cylindrical shape from a synthetic resin material and is open on one side, and has a hole 47 passing through the connecting pipe section 35 on the other side to connect the end surface of the fuel pipe 25 and the main body 37. A plurality of communication passages 49 are provided in the outer periphery of the filter cover 43 in the form of grooves. In the above embodiment, the fuel in the fuel tank 17 passes through the filter 31 from the communication passage 49 and is sucked into the carburetor from the fuel pipe 25 through the hole 41, but the filter 31 covered by the filter cover 43 is Since it is possible to move freely within the fuel tank 17 without directly touching the inner wall of the fuel tank 17, impurities filtered by the filter 31 are transferred to the fuel tank 17.
There is no pressure on the wall surface of the wall, so no clogging occurs, and when cleaning,
By removing the connecting pipe portion 35 from the fuel pipe 25, the filter cover 43 can also be removed at the same time. Furthermore, by removing the U-shaped fixing member, the filter 31 can be easily removed. It is also easy to clean.

(e) Effects of the invention Since the present invention has the configuration as described in the claims, impurities can be easily removed by cleaning etc. without causing clogging, and it has a simple structure and a filter. can be easily cleaned. In addition, filter cover 4
A gap is provided between the inner diameter surface of the filter cover 3 and the outer circumferential surface of the filter 31, and this gap is connected to the filter cover 4.
It may also be a communication path 49 that communicates with the opening of No. 3.
Note that the present invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments. Furthermore, the reference numerals used in the claims do not limit the technical scope of the present invention. FIG. 4 shows a conventional example, in which a metal main body 37 is provided with an opening 51 that also serves as a weight, and a filter 31 is provided outside of the opening 51. In FIG. 5, the same reference numerals as those shown in FIGS. 1 to 4 represent the same components.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of one embodiment of the present invention, Fig. 2 is a side view thereof, Fig. 3 is a plan sectional view thereof, and Fig. 4 is a side sectional view of a fuel tank equipped with a filtration device of the present invention. , FIG. 5 is a side sectional view of a conventional example. 17...Fuel tank, 25...Fuel pipe, 3
1... Filter, 33... Weight, 35...
Connecting pipe part, 37...main body, 39...fixing member,
41...hole, 43...filter cover, 49
...Communication path.

Claims (1)

[Scope of utility model registration request] Connecting pipe portion 3 that penetrates the wall surface of fuel tank 17 and engages with the lower end of fuel pipe 25 that communicates with the carburetor.
A filter 31 made of a porous material and abutting on the other side of the main body 37 is provided with a main body 37 that is integrally formed with a main body 37 projecting from one side thereof, and a filter 31 made of a porous material is fixed to the main body 37 by a fixing member 39. The fuel pipe 25 and the filter 31 are provided in communication with each other through a hole 41 passing through the main body 37, and the outer periphery of the filter 31 is covered, and the filter A filter cover 43 having a communication passage 49 connecting the outer periphery of the fuel pipe 25 and the outside of the filter cover 43 is connected to the fuel pipe 25 and the main body 37.
A filtration device for a fuel tank, characterized in that it is sandwiched between the filtration device and the fuel tank.