JPH0630253Y2 - Fuel tank filter mounting structure - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention is attached to the tip of a suction pipe arranged in a fuel tank of an automobile so that impurities such as dust are not mixed in liquid fuel to be sucked. As described above, the present invention relates to an improvement in a filter mounting structure for filtering the liquid fuel.

"Prior Art" As a conventional mounting structure of this type, for example, Japanese Patent Laid-Open No. 62-first
There is one disclosed in Japanese Patent No. 68513.

Although the mounting structure of the filter is not specifically shown,
When the filter is attached to the tip of the suction pipe, a separate molded joint tool is used, wherein the joint tool is a cylindrical main body connected to the tip of the suction pipe, It consists of two parts, a cover body that is fitted onto the cylindrical body.

The former tubular body has a structure in which an annular locking portion that locks the cover body is formed on the upper side of the outer peripheral surface of itself, and an annular collar portion that holds the filter is formed on the lower side of the outer peripheral surface. The latter cover body has a cylindrical portion formed on the upper side thereof to be fitted onto the cylindrical body, and a protruding portion formed on the lower side to cooperate with the annular collar portion and hold the filter. Has become.

Therefore, when the filter is attached to the tip portion of the suction pipe by using the joint tool composed of the tubular body and the cover body having such a configuration, the tubular body is inserted into the through hole of the bag-shaped filter. After the through-hole periphery of the filter is put on the annular collar portion of the tubular body through the upper part, and the tubular portion of the cover body is externally fitted from the upper side of the tubular body, the edge of the tubular portion of the cover body becomes At the same time as being locked to the annular locking portion of, the overhanging portion of the cover body and the annular brim portion of the tubular main body are overlapped with each other, and the filter is held between the facing surfaces of the both portions. After that, if the tubular main body of the joint tool is connected to the suction pipe, the bag-shaped filter will be attached to the tip of the suction pipe.

"Problems to be solved by the invention" However, the conventional mounting structure is based on the premise that the filter is indirectly attached to the suction pipe by using a unique joint tool, and the joint tool has a complicated tubular body. Since the cover body is made up of two parts, the number of parts naturally increases, and the mounting structure itself has a large problem.

Moreover, in the conventional mounting structure, the configuration in which the filter is sandwiched between the annular collar portion of the tubular body and the overhang portion of the cover body is
If there are manufacturing dimensional errors or variations in the clearance between the locking portion and the collar of the tubular body and the height of the cover body, the dimension errors and variations may cause the dimensional errors. As a result, it becomes impossible to obtain a reliable gripping force against the filter, and the mounting condition of the filter becomes extremely unstable, and in the worst case, the filter may fall off. .

"Means for Solving the Problem" The present invention was developed in order to effectively solve the above-mentioned conventional problems, and is fixed to the tip of the suction pipe arranged in the fuel tank. Assuming a mounting structure for mounting a filter through the body, the fastening body has a fitting elastic hole in which a suction pipe is fitted in a central portion thereof, and an inclined elastic portion which rises at an inner peripheral side thereof at a constant inclination angle. None, while the outer peripheral side forms a horizontal fastening portion that extends horizontally, while the suction pipe has an annular locking portion that locks the inclined elastic portion edge of the fastening body on the outer peripheral surface of the tip portion, and the horizontal fastening of the fastening body. A configuration is provided in which an annular flange portion that cooperates with the attachment portion and holds the filter is formed at a constant interval, and concave-convex fitting means is formed on the opposing surface of the annular flange portion and the horizontal fastening portion. Adopted.

According to the "action", according to the present invention, the fastening body is externally fitted from the upper side of the suction pipe through the fitting hole, and the inclined elastic portion edge of the fastening body is fitted to the annular locking portion of the suction pipe. It is elastically locked at the same time, and at the same time, the fitting state of the concave-convex fitting means is obtained, and the filter is held between the horizontal fastening portion of the fastening body and the annular collar portion of the suction pipe. The filter can be directly attached to the tip of the suction pipe without using a joint tool.

Moreover, when the filter is attached, the elastic force of the inclined elastic portion of the fastening body can be effectively used to hold the filter between the horizontal fastening portion of the fastening body and the collar portion of the suction pipe. In addition to ensuring a reliable filter attachment state, even if there is a dimensional variation between the locking portion and the collar portion of the suction pipe, the bending of the inclined elastic portion of the fastening body prevents Since it is possible to effectively absorb variations and the like,
There is no fear of the filter mounting condition becoming unstable due to dimensional variations.

[Examples] Hereinafter, the present invention will be described in detail with reference to an illustrated example. A mounting structure according to the example has the following fastening structure at a tip portion of a suction pipe arranged in a fuel tank. It is characterized in that the filter is directly attached through the body.

This will be specifically described. The fastening body 1 of the present embodiment is formed into a disk shape by using a synthetic resin material or a metal material, and as shown in FIG. The hole 2 is formed, and the inner peripheral side of the hole 2 is formed as an inclined elastic portion 3 which rises at a constant inclination angle.
A plurality of slits 4 that allow bending are formed on the edge of, and the outer peripheral side is formed as a horizontal fastening portion 5 that extends horizontally,
An annular convex portion 6 is formed on the lower surface side of the horizontal fastening portion 5.

Further, the suction pipe 7 of this embodiment is connected to an electric pump (not shown) fixedly installed in the fuel tank, and is integrally molded of a synthetic resin material to form an outer peripheral surface of its own tip. In addition, the annular locking portion 8 that locks the edge of the inclined elastic portion 3 of the fastening body 1 and the annular collar portion 9 that holds the filter in cooperation with the horizontal fastening portion 5 of the fastening body 1 are fixed. Are formed integrally with each other at intervals, and an annular recess 10 that fits with the projection 6 of the horizontal fastening portion 5 is formed on the upper surface side of the annular flange 9.

Therefore, when the filter 11 is attached to the tip portion of the suction pipe 7 having such a configuration via the fastening body 1, as shown in FIG. 2, the inside of the through hole 11a formed on the filter 11 side. After passing through the upper part of the suction pipe 7 and aligning the peripheral edge of the through hole 11a of the filter 11 on the annular collar portion 9 of the suction pipe 7, the fastening body 1 is inserted from the upper side of the suction pipe 7 through the fitting hole 2. The outer edge of the inclined elastic portion 3 of the fastening body 1 is elastically locked to the annular locking portion 8 of the suction pipe 7, and at the same time, the horizontal fastening portion 5 of the fastening body 1 is sucked by 7
Since the convex portion 6 and the concave portion 10 are overlapped with each other to obtain the concave and convex fitting state, and the filter 11 is sandwiched between the facing surfaces of the collar portion 9 and the horizontal fastening portion 5, the bag 11 is thereby formed. The filter 11 shaped like a
It will be easily and directly attached.

Moreover, in such a mounted state of the filter 11, the filter 11 sucks the horizontal fastening portion 5 of the fastening body 1 by effectively utilizing the elastic force of the inclined elastic portion 3 of the fastening body 1. Since the flanges 9 of the pipe 7 are elastically held between the flange portions 9 with the concavo-convex fitting state, a reliable mounting state is always guaranteed.

Further, even if a dimensional variation or the like occurs between the locking portion 8 and the collar portion 9 of the suction pipe 7, the inclination elastic portion 3 of the fastening body 1 elastically bends the variation or the like effectively. Since it can be absorbed, there is no fear that the mounting state of the filter 11 becomes unstable due to dimensional variation or the like.

In addition, in the above embodiment, in order to obtain a strong grip and sealing property of the filter 11, the convex portion 6 is formed on the horizontal fastening portion 5 of the fastening body 1, and the collar portion 9 of the suction pipe 7 is formed. Although the concave portion 10 is formed, it goes without saying that the convex portion 6 and the concave portion 10 can be formed in reverse.

[Advantage of the Invention] As described above, according to the mounting structure of the present invention, the stopper body is externally fitted from the upper side of the suction pipe, and the inclined elastic portion edge of the stopper body is attached to the annular locking portion of the suction pipe. It is characterized in that the filter is held between the horizontal fastening portion of the fastening body and the collar portion of the suction pipe while at the same time being elastically locked to, by obtaining the fitted state of the concave and convex fitting means. Since it is possible to directly attach the filter to the tip of the suction pipe without using a complicated joint tool as in the past, it is possible to reduce the number of parts and greatly contribute to the simplification of the attachment structure itself. .

Moreover, since the present invention utilizes the elastic force of the inclined elastic portion of the fastening body to hold the filter between the horizontal fastening portion of the fastening body and the collar portion of the suction pipe, a reliable filter is always provided. Is secured, and even if there is dimensional variation between the locking part and the collar part of the suction pipe,
The elastic bending of the inclined elastic portion of the fastening body can effectively absorb such variations and the like.Therefore, there is no fear that the mounting state of the filter becomes unstable due to the dimensional variations or the like. lost.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a fastening body and a suction pipe used in a mounting structure according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a mounting state of a filter. 1 ... Fastening body, 2 ... Fitting hole, 3 ... Same inclined elastic portion, 5
...... Same horizontal fastening part, 6 ...... Convex part, 7 ...... Suction pipe, 8
…… Annular locking part, 9 …… Annular collar part, 10 …… Recessed part, 11
……filter.

Claims (1)

[Scope of utility model registration request] 1. A mounting structure for attaching a filter to a tip portion of a suction pipe arranged in a fuel tank via a stopper, wherein the stopper has a suction pipe fitted in a central portion thereof. A hole is formed to form an inclined elastic portion that rises at a constant inclination angle on the inner peripheral side and a horizontal fixing portion that extends horizontally on the outer peripheral side, while the suction pipe is fixed to the outer peripheral surface of the tip portion. An annular locking portion that locks the edge of the inclined elastic portion of the filter and an annular collar portion that holds the filter in cooperation with the horizontal fastening portion of the fastening body are formed at a fixed interval, and the annular collar is formed. A structure for mounting a filter for a fuel tank, characterized in that concave-convex fitting means is formed on the facing surface of the horizontal portion and the horizontal fastening portion.