JPH062724Y2 - Filter- - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to improvement of a filter mounted on various pumps, and more specifically, a filter of a pump mounted in a fuel tank of an automobile is integrally molded of resin. The present invention relates to the provision of a filter which is provided as a product, which is capable of reducing the cost of molding and assembling the filter and at the same time preventing the inflow of foreign matter.

(Prior Art and Its Deficiencies) Conventionally, various types of filters have been used which are attached to the strainer portion of a pump depending on the properties of each liquid, the properties of the pump, and the like.

Of filters installed in such pumps, such as fuel tanks, which require efficient suction from inside a tank with a rated capacity, and also the suction until the residual liquid level in the tank reaches the lowest level. Has many restrictions due to its equipment conditions, and each has been improved.

Generally, the strainer equipped in this kind of fuel tank is provided along the bottom of the tank as much as possible, and the strainer is made cylindrical in order to secure the intake and intake area, and the diameter of the cylindrical filter part is thickened. Or, the filter part was set to be long.

However, when the diameter of the cylindrical filter portion is increased, the upper part of the filter is often exposed from the liquid surface due to the lowering of the liquid surface level in the tank, which causes a problem that the filtration area of the filter sharply decreases. Had. Also, when the cylindrical filter part is set to a long length, it is naturally difficult to mount it inside the tank, and there is the inconvenience that the tip of the filter comes into contact with the bottom surface of the tank due to vibration etc. As a result, exposure from the liquid surface level or contact with the bottom surface of the tank is liable to occur, and in the former case, the filtration capacity of the filter is reduced, and in the latter case, there is a disadvantage that sediment and dust on the bottom surface of the tank are sucked.

From this point of view, the Applicant has made the filter provided along the bottom of the tank as flat as possible to expand the filtration area and keep the installed filter above the liquid level even when the liquid level in the tank drops. The invention of Japanese Utility Model Application No. 61-117512 was devised as a means for efficiently and surely taking out the fuel in the tank by preventing it from being exposed as much as possible.

Certainly, in the above-mentioned invention, most of the drawbacks of the conventional example are solved, and the fuel stored in the tank can be efficiently ejected to an extremely low level in the tank, which is within this low level. Even when the liquid is taken out, it has a feature that a filtration area corresponding to an efficient filtration capacity is secured and suction of dust or water deposited on the bottom of the tank can be effectively avoided.

However, in the filter device according to the above invention, the upper and lower net pieces 104a and 104b used for folding, the mounting member 102 and the stopping member 111 are separately configured, and the mounting member is
Stop member with 102 simply inserted through hole 109 provided in the mesh piece
111 is fitted to the protruding portion of the mounting member 102, and the stopper member 11
The opening edge of the hole 109 of the mesh piece 104a is clamped between 1 and the flange 105 of the mounting member 102.

As a result, if the pressure contact force between the collar 105 of the mounting member 102 and the stopper member 111 is loosened, there is the inconvenience that mixed foreign matter flows in through the gap between the two and the mesh piece 10 is present.
Since the 4a and 104b and the mounting member 102 are separately maintained in a mere bulging state, there is a disadvantage that the filter 104 portion slumps downward due to the loosening of the squeezed state.

In addition, the net piece 104a is removed from the edge of the hole 9 in accordance with the application of some external force.
There is a problem that the film is torn, and there is a risk that unexpected filtration failure may occur, and the parts are many such as the filter 104, the mounting member 102 and the stopping member 111, and the frame 107, and the component cost and the component assembly cost are high. Had inconvenience.

(Purpose and structure of the present invention) The filter according to the present invention is proposed to eliminate the above-mentioned drawbacks of the conventional example, and the net material forming the filter and the mounting member are integrally formed. This will reduce the number of parts, and at the same time reduce the assembly cost, provide a filter structure that can effectively prevent the inhalation of foreign substances, and provide a filter that has a filtration surface with good filtration efficiency. The construction is such that a mounting port 2 is prepared in advance in a mesh material 1 serving as a filter mesh, and a tube body 3 is formed by resin molding so as to take in the edge of the mounting port 2. The tubular body 3 is configured such that both sides of the tubular body 3 project from both sides of the net cloth 1 and have a suction port 4 communicating with the mounting port 2. Then, one side of the tubular body 3 is attached to the fuel pump side, and the other side is positioned inside the net bag 5 constituted by the net cloth 1.
That is, the net cloth 1 is obtained by folding the net cloth 1 and folding the net cloth 1 so that one of the tubes 3 is held inside the net cloth 1.
Welded the periphery of the.

(Operations and Effects) The filter according to the present invention has the following operations and effects due to the above-mentioned characteristic structure.

(1) The tubular body 3 and the net cloth 1 are welded and integrated, and the inconvenience of foreign matter from the joint between the net cloth 1 and the tubular body 3 flowing into the pump side is reliably prevented.

(2) Since the tubular body 3 is integrally formed with the net cloth 1 by resin molding, the number of parts is small and the assembly cost is low.

(3) Since the tubular body 3 and the net cloth 1 are directly welded to each other, the net cloth 1 does not sag downward or warp and the original installation state is maintained as it is. As a result, it is possible to prevent the deterioration of the filtering function due to the exposure of the mesh surface due to the sagging or warping or the deterioration of the filtering function due to the adsorption of the precipitated foreign matter.

(4) Net bag 5 with flatness under the conditions required at any time
Thus, it is possible to provide a filter having characteristics that follow the fuel tanks and the like that are respectively mounted.

(5) Since the tubular body 3 is formed integrally with the net cloth 1, and the tubular body 3 is directly attached to the pump suction port or the like, rattling or loosening between the assembled parts occurs. There is no inconvenience.

(Embodiment) Hereinafter, a typical embodiment of the filter according to the present invention will be described with reference to the accompanying drawings.

Reference numeral 1 is a net material constituting the filter A, which is usually a monofilament or multifilament twill weave material 20.
Use 0 mesh. The net cloth 1 is formed into a substantially rectangular shape, and a mounting port 2 is provided in advance at a substantially central portion thereof, and the tubular body 3 is integrally resin-molded within a range including a rim 1a of the mounting port 2 to communicate with the mounting port 2. A suction port 4 is provided.

The tube body 3 thus constructed has a collar 3a whose rim 1a is surely incorporated in the molding resin, and the suction tube portion 3b projecting on both sides of the mesh body 1 via the collar 3a. And a mounting pipe portion 3c.

The suction pipe portion 3b is provided in a direction substantially orthogonal to the net cloth 1, and has a free end portion having an enormous engagement portion 3d which is tapered toward the free end portion of the hose 6 made of NBR material or the like. We provide a mounting part.

Further, the mounting pipe portion 3c is composed of a straight pipe portion 3c 'communicating with the suction pipe portion 3b and an inclined pipe portion 3c "that is provided continuously from the straight pipe portion 3c' and is directed obliquely upward. Is provided on the side of the suction hole 4 of the straight pipe portion 3c '.
f is provided so that the mounting pipe portion of the pump or the like is accommodated. Also, the inner portion of the inclined pipe portion 3c ″ and the straight pipe portion 3c ′
The crossing position on the upper side of the above is an expanded chamber 3g, which is configured to promote a smooth flow of the sucked liquid. Further, the suction port 4 of the inclined pipe portion 3c ″ has a diameter-expanded shape having a gentle draft toward the outlet side thereof, so that the pump suction portion B can be watertightly fitted to the suction pipe 7. There is.

The mesh piece 1 of the filter having such a structure is attached to the collar 3a.
The upper and lower net pieces 1 and 1 are superposed so as to hold the suction pipe portion 3b and the hose 6 attached to the suction pipe portion 3b by folding the mesh pipes 1 and 2. Therefore, according to the size, shape, degree of swelling, etc. of the target filter, the welding 8 by the welder process is applied to the peripheral edge of the overlapping mesh pieces 1, 1.
The mesh bag 5 of the filter is constructed.

In addition, 9 is a tab for mounting the filter, and the mounting hole 9a
have.

Reference numeral 10 denotes an evaporation, which is provided as required, and is usually a protruding tube having pores 10a of about 2.5φ on the upper surface of the mesh bag 5 and has a collar 10b similar to the tube body 3.
It is erected on the net bag 5 by taking in and forming the periphery of the hole 11 of the net cloth.

The filter A constructed in this way is used as a state in which the suction pipe 7 of the pump suction portion B is fitted to the inclined pipe portion 3c ″ so as to be firmly fixed to the slant pipe portion 3c ″ so as to be gently inclined with respect to the pump suction portion B. Equipped in the tank.

Incidentally, as a typical method of forming the filter A on the above, after introducing the net cloth drawn out from the mesh roll into the mold and punching the attachment port 2 and the hole 11,
The mesh material is transferred until the punching port 2 and the hole 11 are positioned in the respective cavities, and resin is injected into the edge 1a of the mesh material including the mounting port 2 and the hole 11 to form the pipe 3 and the evaporation 10. Are to be integrally molded and provided at the same time.

In the filter A of such an embodiment, the shape, degree of flatness, size, etc. of the mesh bag 5 can be freely set. Therefore, it is possible to filter and suck the fuel corresponding to each purpose such as fuel conditions. It itself has the advantages of low molding cost and simple mounting operation.

Further, the hose 6 prevents the mesh bag 5 from being dented during suction, and prevents the mesh bag 5 from sagging or warping due to the tubular body 3 and the mesh material 1 being integrally molded. The set filter A has the feature of always maintaining the desired installation conditions.

Furthermore, since the net cloth 1 and the tube body 3 are integrally molded, there is no gap generated on the mounting surface between them,
It has the features of effectively eliminating the inconvenience that the precipitated foreign matter, water, etc. are sucked into the pump and reliably providing an appropriate amount of filtration surface.

[Brief description of drawings]

FIG. 1 is a side view of the filter according to the present invention before the construction of the mesh bag, FIG. 2 is the same sectional view, FIG. 3 is the same plan view, and FIG. 4 is a plan view of the filter which constitutes the mesh bag. The figure is the same sectional view,
FIG. 6 is a fragmentary perspective view showing an attachment state of the conventional filter, and FIG. 7 is an essential part perspective perspective view before attachment. In the drawings, 1 ... Net cloth, 2 ... Mounting port, 3 ... Tube, 4 ... Suction port, 5 ... Net bag, 6 ... Hose, 7 ... Suction pipe, 8 ... Welding,
9 ... Tab, 10 ... Evaporation, 11 ... Hole.

Claims (1)

[Scope of utility model registration request] 1. A tubular body having a suction port communicating with the mounting port on both sides of a net fabric having a mounting port formed therein and integrally molded with resin to carry the mounting port edges of the net fabric. At the same time, the mesh material is folded so as to hold one side of the tubular body, and its polymerized peripheral edge is welded to form a bag.