JP4198686B2 - Fuel tank filler filter - Google Patents

Description

  The present invention relates to a fuel tank filler filter, and more particularly, to a fuel tank filler filter configured to support a cup-type filter inside a fuel filler.

  Conventionally, in this type of fuel tank fuel filler filter, as shown in FIG. 4, a cylindrical fuel filler 2 protrudes from the upper surface portion 1 a of the tank body 1, and a support member 3 is attached to the inner wall surface of the fuel filler 2. The flange 4a attached to the upper surface opening of the cup-type filter 4 is supported by the support member 3, and the bottom 4b of the filter 4 protrudes from the lower end 2a of the fuel filler 2 into the tank body 1. Is configured to do. Then, a fuel supply nozzle (not shown) is inserted from the upper surface opening 2 b of the fuel supply port 2, a tip portion thereof is inserted into the filter 4, and impurities in the fuel supply are collected by the filter 4. Impurities are prevented from entering the inside of the tank 1.

The inner pipe includes an outer pipe fixed through the washer seated on the fuel tank, an inner pipe fixed at an interval from the outer pipe, and a strainer suspended below the inner pipe. 2. Description of the Related Art There is known a fuel filler port in which a large number of air vent holes in a fuel tank are provided on a peripheral surface on the upper end side of a pipe (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 4-14086

  The conventional fuel tank filler filter shown in FIG. 4 has a filter lower part L1 below the lower end 2a of the filler inlet in the tank body 1 in the entire length L of the filter 4. Since it is large, the rising speed of the oil level 5 in the filter lower part L1 is slow during refueling. However, since the filter upper portion L2 above the lower end portion 2a of the fuel filler port is in the fuel filler port 2 and the volume of the fuel filler port 2 is significantly smaller than that of the tank body 1, the oil level 5 in the filter upper portion L2 during fueling. The ascending speed becomes steep.

  In a state where the oil supply nozzle is inserted into the filter 4 from the upper surface opening 2b, the boundary position 6 between the lower end 2a of the oil supply port and the upper surface 1a of the tank body cannot be visually recognized, and the oil level 5 rises. The oil supply is stopped while monitoring the state. However, after the oil level 5 rises from the lower L1 part to the upper L2 part of the filter 4, the oil level 5 rises rapidly, so the oil supply stop is stopped. It is easy to delay and the amount of fuel supply becomes excessive, and the fuel may overflow from the upper surface opening 2b of the fuel supply port. In order to prevent this, the operator may remove the filter 4 and refuel, and in such a case, the filtering function by the filter will be impaired.

  In the invention described in Patent Document 1, the air in the fuel tank is discharged from the air vent hole at the time of refueling, so that the inflow of the fuel becomes smooth, and the fuel is not clogged during the refueling to shorten the refueling time. However, it is not possible to prevent the oil level from rising at the end of refueling and overflowing fuel from the refueling port.

  Therefore, in a fuel tank filler filter configured such that the bottom of the filter mounted in the filler opening projects into the tank body from the lower end of the filler opening, the lower end of the filler opening and the upper surface of the tank body Therefore, a technical problem to be solved in order to prevent the overflow of fuel due to an excessive amount of refueling arises, and the present invention aims to solve this problem.

The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is characterized in that a cylindrical oil supply port projects from the upper surface of the tank body, and a support member is provided on the inner wall of the oil supply port. the attached, to support the upper opening of the cup-shaped filter, a fuel filler port filter configured fuel tank as the bottom of the filter protrudes into the tank body from the lower end portion of the fuel supply port,
In the filter for a fuel tank provided with a boundary identifying means at a boundary position between the lower end of the fuel filler and the upper surface of the tank body ,
The filter is formed of different materials for the upper part and the lower part, and the upper part and the lower part, which are visible from above the filler port, are joined to the boundary position between the lower end part of the filler port and the upper surface part of the tank body. There is provided a fuel tank filler filter comprising the above-described boundary identifying means by arranging a portion .

  According to this configuration, the boundary identifying means provided on the filter can identify the boundary position between the lower end portion of the fuel filler port and the upper surface portion of the tank body, and the oil level is provided with the boundary identifying means during oiling. When the fuel level rises to the position, it is determined that the oil level has risen to the boundary position between the lower end portion of the fuel filler port and the upper surface portion of the tank body, and the fueling can be stopped before the fuel overflows from the fuel filler port.

  According to this configuration, the joint between the upper and lower parts of the filter made of different materials is used as the boundary identification means. It is determined that the fuel has risen to the boundary position between the lower end portion and the upper surface portion of the tank body, and the fuel supply can be stopped before the fuel overflows from the fuel supply port.

  According to the first aspect of the present invention, the boundary position between the lower end portion of the fuel filler port and the upper surface portion of the tank body can be identified by the boundary identifying means provided in the filter. Therefore, when the oil level rises to the position where the boundary identification means provided on the filter is provided during refueling, it is determined that the oil level has risen to the boundary position between the lower end portion of the oil filler port and the upper surface portion of the tank body. Thus, fuel supply can be stopped, and overflow of fuel due to excessive fuel supply can be prevented.

This invention, the joint was different from the material of the filter at the top and the bottom and the boundary identifying means, by visually recognizing the joints, in addition to the above effects, the lower end and the tank of the fuel supply port from above the boundary position filler opening of the upper surface portion of the body, it can be identified more reliably.

  Hereinafter, the fuel filler port of the construction machine according to the present invention will be described with reference to preferred embodiments. The bottom part of the filter installed in the filler port is the bottom part of the filler port for the purpose of preventing the overflow of fuel due to excessive amount of fuel so that the boundary between the lower part of the filler port and the upper surface of the tank body can be understood The fuel tank filler filter configured to protrude from the tank body into the tank body is provided with boundary identification means at the boundary position between the lower end portion of the fuel inlet and the upper surface portion of the tank body. Realized by.

  FIG. 1 shows a hydraulic excavator 10 as an example of a construction machine, and an upper swing body 13 is mounted on a lower traveling body 11 via a swing mechanism 12 so as to be rotatable. The upper swing body 13 is provided with a cab 14 on one front side thereof, and a boom 15 is attached to the front center portion so as to be able to be raised and lowered. Further, an arm 16 is attached to the tip of the boom 15 so as to be rotatable up and down, and a bucket 17 is attached to the tip of the arm 16.

  In addition, an engine 18 is mounted laterally on the rear part of the upper swing body 13, and various devices (not shown) such as a hydraulic pump are provided in the front part of the engine 18. A hydraulic oil tank 20 is attached. The engine 18, various devices, the fuel tank 19, and the like are covered with a house cover 21.

  FIG. 2 shows a fuel filler opening portion of the fuel tank according to the first embodiment. For convenience of explanation, the same reference numerals are used for the same components as those described in the background art. A cylindrical oil supply port 2 protrudes from the upper surface portion 1a of the tank body 1, a support member 3 is attached to the inner wall surface of the oil supply port 2, and the flange 4a provided at the upper surface opening of the cup-type filter 4 is provided with the above-described flange 4a. The support member 3 is configured to support.

  The filter 4 is formed of a metal or synthetic resin mesh material so that the fuel to be supplied can be filtered to collect impurities. On the side surface of the filter 4, a boundary line 10 that can be identified from above the fuel filler port is provided as a boundary identifying means at a boundary position 6 between the lower end portion 2 a of the fuel filler port and the upper surface portion 1 a of the tank body.

  The boundary line 10 is provided on the inner side surface or both inner and outer side surfaces of the filter 4 so that the boundary line 10 can be seen from above, and is formed by painting a paint or the like, and is formed by fixing a metal or resin wire. May be. Further, the mesh material can be formed by rib processing. Alternatively, the entire upper portion or the lower portion of the filter 4 may be painted, and the end portion may be used as the boundary line 10.

  Thus, even when an oil supply nozzle (not shown) is inserted into the filter 4 from the upper surface opening 2b of the oil supply port 2, the operator can easily access the boundary line 10 from the upper surface opening 2b of the oil supply port. Can be visually recognized. Therefore, when it is visually recognized that the oil level 5 has risen to the position of the boundary line 10 while monitoring the rising state of the oil level 5 during refueling, the lower end 2a of the fuel filler port and the upper surface 1a of the tank body It can be determined that the oil level 5 has risen to the boundary position 6 and the fuel supply can be stopped, and the overflow of the fuel due to the excessive amount of fuel supply can be prevented.

  FIG. 3 shows a fuel filler port portion of a fuel tank according to the second embodiment. For convenience of explanation, the same components as those described in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. . As shown in the figure, in the total length L of the filter 4, the filter lower portion L1 in the tank body 1 below the lower end 2a of the fuel filler port is fuel to be refueled in the same manner as the filter described in the first embodiment. It is formed with a mesh material of metal or synthetic resin so that impurities can be collected by filtration.

  On the other hand, the filter upper part L2 from the lower end part 2a of the oil supply port to the oil supply port 2 is formed of a material different from that of the filter lower part L1, and the joint part between the filter lower part L1 and the filter upper part L2 20 is formed so as to be positioned at a boundary position 6 between the lower end portion 2a of the fuel filler opening and the upper surface portion 1a of the tank body, and the joint portion 20 is used as a boundary identifying means.

  The material of the filter upper portion L2 is not particularly limited as long as it can be easily distinguished from the filter lower portion L1, but may be a cylindrical body of metal or synthetic resin, for example. In general, since the oil supply nozzle is inserted into the filter 4 to supply oil, the filter function is not likely to deteriorate so much even if the filter upper portion L2 is not a mesh material.

  Thus, even when an oil supply nozzle (not shown) is inserted into the filter 4 from the upper surface opening 2b of the oil supply port 2, the operator can easily access the joint 20 from the upper surface opening 2b of the oil supply port. Can be visually recognized. Therefore, similarly to the configuration of the first embodiment, when it is visually confirmed that the oil level 5 has risen to the position of the joint 20 while monitoring the rising state of the oil level 5 during refueling, the lower end 2a of the fuel filler port Therefore, it can be determined that the oil level 5 has risen to the boundary position 6 between the tank body and the upper surface portion 1a of the tank body, so that the fuel supply can be stopped and the overflow of the fuel due to the excessive amount of fuel supply can be prevented.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

1 is a side view of a hydraulic excavator to which the present invention is applied. BRIEF DESCRIPTION OF THE DRAWINGS FIG. The partial notch longitudinal cross-sectional view which shows the fueling port part of the fuel tank which concerns on Example 2 of this invention. The partially cut away longitudinal cross-sectional view which shows the fueling inlet part of the conventional fuel tank.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tank main body 1a Upper surface part 2 Oil supply port 2a Lower end part 2b Upper surface opening part 3 Support member 4 Filter 4a Flange 4b Bottom part 5 Oil surface 6 Boundary position L1 Filter lower part L2 Filter upper part

Claims (1)

A cylindrical oil supply port projects from the upper surface of the tank body, and a support member is attached to the inner wall of the oil supply port to support the upper surface opening of the cup-type filter, and the bottom of the filter is the oil supply port. a fuel supply port filter configured fuel tank so as to protrude from the lower end portion into the tank body,
In the filter for a fuel tank provided with a boundary identifying means at a boundary position between the lower end of the fuel filler and the upper surface of the tank body ,
The filter is formed of different materials for the upper part and the lower part, and the upper part and the lower part, which are visible from above the filler port, are joined to the boundary position between the lower end part of the filler port and the upper surface part of the tank body. An oil filler filter for a fuel tank, wherein the boundary identifying means is configured by arranging a portion.

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