JPH0434885Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a filter that is fixed to the tip of a suction pipe inserted into a fuel tank of an automobile to prevent impurities such as dust and ice blocks from being sucked in.

[Prior Art] Usually, a filter is attached to a suction pipe inserted into a fuel tank to prevent impurities from being sucked in.

Traditionally, this type of filter used a metal mesh as the mainstream, but now, with the development of molding technology, synthetic resin filters are replacing this. With the development of synthetic resin nets, a technology for integrally molding them with the frame was proposed, for example, in Japanese Utility Model Publication No. 52-37915, and was put into practical use. However, this filter, which is integrally molded with the frame, has a problem in that the surface area of the net is narrowed by the frame, resulting in a reduction in the filtration area. Therefore, as a means to solve this problem, the present applicant succeeded in developing a filter that eliminates the frame provided to maintain the mesh body in a fixed shape.
It was published under Utility Model Publication No. 118510/1983.

This filter has a shape-retaining body instead of a frame inside a bag-shaped mesh body, which keeps the mesh body expanded from the inside.By integrating with the frame, the filter can be narrowed. This allows for maximum filtration surface area.

However, one difficulty with this idea is that the net is pushed outward by the shape-retaining body, and the bottom of the net, which is pressed against the bottom of the fuel tank, gets rubbed by the vibrations of the vehicle and becomes damaged after long-term use. I had to do it.

Damage caused by this friction occurs inside the tank, making it difficult to confirm, and there is a risk of introducing impurities into the engine.

[Problems to be solved by the invention] The present invention was devised in view of the problems with conventional filters and for the purpose of improving them. The fuel tank filter is made of a synthetic resin mesh that secures its effective area, eliminates friction with the fuel tank, prevents damage to the mesh, and improves productivity by simplifying manufacturing. This is what we intend to provide.

[Means for solving the problem] That is, the present invention fixes a protective cap to the lower surface of the bottom of a bag-like mesh body that is held in an inflated state by support arms serving as shape-retaining means, and attaches a filter to When attached to the suction pipe and attached to the fuel tank, this protective cap is brought into contact with the bottom of the fuel tank to avoid direct contact between the net and the fuel tank. Furthermore, in the present invention, a pedestal is integrally provided at the tip of the support arm, and a protective cap attached to the lower surface of the bottom of the net is connected and fixed to a joint formed on the pedestal, so that the net can be easily clamped. The objective is to provide a fuel tank filter that can be installed in the fuel tank.

[Function] As mentioned above, the filter of the present invention has a protective cap fixed to the lower surface of the bottom of the net, and this protective cap is brought into contact with the bottom of the fuel tank, thereby avoiding contact between the net and the fuel tank. Therefore, even if friction occurs between the fuel tank and the filter due to engine vibrations or vibrations caused by driving, this will effectively protect the fuel tank from scratch damage.

Hereinafter, the filter according to the present invention will be described in detail according to the illustrated embodiments, and its features will be clarified.

[Example] Fig. 1 is a partially cutaway plan view, and Fig. 2 is a central vertical sectional front view. Reference numeral 1 in the drawings is a mounting body attached to the tip of a suction pipe (not shown) inserted vertically into the fuel tank 2, 3 is a mesh body attached via this mounting body, and 4 is a mesh body. This is a mounting cover for securing to the mounting body.

The mounting body 1 and the mounting cover 4 are molded from thermoplastic synthetic resin. It integrally has a fastening part 6 for fastening the mesh body which is stretched out in shape.

The connecting portion 5 has a slit 7 at the upper end to facilitate fitting of the pipe, and an annular recess 8 on the inner circumferential surface to prevent the pipe from slipping out, into which a node that expands in diameter on the outer circumferential surface of the tip end of the pipe is fitted. Furthermore, a locking step 9 for locking the mounting cover 4 is provided midway along the length of the outer circumferential surface.

The mounting cover 4 has a substantially cylindrical shape, and the upper end is formed into a thin shape similar to a conical shape to provide flexibility, and the lower end is expanded into a brim shape and is attached to the upper surface of the fastening portion 6. We are ready to meet face to face. The upper end is provided with several vertical slits to facilitate expansion, so that it can be easily engaged with the locking step 9 when assembled to the mounting body.

On the other hand, the fastening part 6 of the attached body has a stepped part 11 on the top surface for fastening the opening of the net, and a pair of support arms 13 are provided extending downward from the peripheral part via a thin hinge part 12. do.

The support arm 13 is provided with a freely bendable hinge part 14 in the middle of its length, and its lower end is connected to a pedestal 16 via a hinge part 15, so that the pedestal is supported directly below the mounting part.

The pedestal 16 cooperates with the support arm 13 to support the net 3, which will be described later, in a swollen state from the inside.
Here, a coupling part 18 for fixing the protective cap 17 is provided on the lower surface, and a locking part 20 for securing one end of a spring member 19 for pressing the base is provided on the upper surface.

The net body 3 is attached to the attached body 1 configured as described above.
is composed of two upper and lower synthetic resin nets 3a and 3b, and an opening 21 is provided in the center of the upper net 3a to allow the connecting portion 5 of the mounting body 1 to pass through.

As described above, this net body 3 is first assembled to the mounting body 1 by passing the upper net 3a through the opening 21 and the connection part 5,
After attaching it to the upper surface of the fastening part 6, it is fixed by fitting the mounting cover 4 to the connecting part.
Thereafter, the upper net 3a and the lower net 3b are overlapped and their edges are joined by heat sealing to form a bag shape.

When heat-sealing the upper and lower meshes, the spring member 19 compressed between the lower end of the connecting portion 5 and the upper surface of the pedestal 16 is compressed to fold the supporting arm 13 into a flat shape, thereby completing the joining. At this point, release this pressure and inflate it.

In this way, the support arm 1 is placed inside the bag-like net body 3.
3. After installing the pedestal 16 and spring member 19,
The protective cap 17 is placed on the lower surface of the pedestal, and the claw 22 provided on the upper surface of the cap is fitted into the connecting part 18 of the pedestal from the lower surface of the net 3b to fix it.

The filter of the present invention is constructed as described above, and is used by fitting the connecting part 5 of the mounting body 1 to the tip of a suction pipe vertically installed in a fuel tank. The manufacturing distance error that occurs between the tip of the suction pipe and the bottom of the tank is absorbed by the bending of the support arm 13, and the protective cap 17 is always brought into contact with the bottom of the tank by the action of the spring member 19. They are attached so that they are in contact with each other, and the net body 3 is supported by the support arms 13 in a swollen state from the inside.

[Effects of the invention] As described in detail in the embodiments above, the filter of the present invention has a structure in which the protective cap is brought into contact with the bottom of the fuel tank to avoid direct contact with the net, so that the filter is protected against vibrations. Even if friction occurs between the mesh and the fuel tank, the mesh will not be damaged by abrasion, so it has the advantage of being able to be used safely for a long period of time.

In addition, the filter of the present invention has a structure in which the protective cap is constantly pressed against the bottom of the fuel tank via the pedestal by the compressed spring member, so the filter does not wobble arbitrarily and can be installed in a stable state. Moreover, since the movement of the protective cap is restricted by the pressure, it will not fall off and can be used safely.

[Brief explanation of the drawing]

The drawing shows one embodiment of the present invention.
The figure is a partially cutaway plan view, and FIG. 2 is a central vertical sectional front view. DESCRIPTION OF SYMBOLS 1... Mounting body, 2... Fuel tank, 3... Net body, 4... Mounting cover, 5... Connection part, 6... Fastening part, 13... Support arm, 16... Pedestal, 17... …
Protective cap, 18... joint portion, 19... spring member, 21... opening.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Consisting of a bag-shaped net body, an attachment body that fixes the net body to a suction pipe, and an attachment cover that fixes the net body to the attachment body, the attachment body is a suction pipe. It has a cylindrical connecting part that connects to the pipe and a net locking part that protrudes from the connecting part in a brim shape, and the opening provided in the net is aligned with the net locking part, and then the connection is made. In a fuel tank filter in which a mounting cover is fitted through the opening of the mesh, the two cooperate to clamp and fix the opening of the mesh. Extended,
A pedestal is supported at the lower end thereof and attached to the inner surface of the bottom of the net body, and a connecting part is provided on the pedestal, and a protective cap attached from the bottom surface of the net body is coupled and fixed thereto. tank filter. (2) In the fuel tank filter according to claim 1 of the utility model registration claim, the pedestal is located directly below the connection part of the mounting body, and the spring member is contracted between the lower end of the connection and the pedestal. A fuel tank filter characterized by the insertion of.