JPH0127845Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention prevents the filter from shaking or dancing, thereby eliminating wear on the contact area between the tank and the inner periphery of the tank inlet, and contaminating the stored liquid with debris generated by this wear. The present invention relates to a filter holding device for a tank inlet, which prevents this from occurring, and also allows a pointer to operate accurately in cases where the tank inlet is equipped with a cap with a level meter.

Generally, a cup-shaped filter is suspended and supported at a tank inlet by hooking its mouth flange onto a filter holder provided on a tank body. As a result, the filter shakes or dances due to the vibrations of the tank, causing the contact area between the mouth flange and the filter holder to wear out, and debris generated by this wear to fall into the tank and contaminate the stored liquid. Sometimes.

Therefore, an oil strainer fixing device disclosed in Japanese Utility Model Application Laid-Open No. 53-56177 has been proposed to solve the above-mentioned disadvantages. This is done by forming an inner circumferential groove for fixing the strainer in the inner part of the tank from the opening end of the oil filler port provided in the oil tank for fuel oil, hydraulic oil, etc., and a part of the upper surface of this inner circumferential groove. A notch is provided in the strainer, a locking flange is stretched over the upper end of the strainer, a locking piece is provided protruding from a part of the periphery of the locking flange, and the locking piece is inserted through the notch into the inner circumferential groove. It is configured to be locked by rotation. However, in the oil strainer fixing device of the prior art, it is necessary to provide a lock piece protruding from the strainer itself, and the structure is complicated.
Since this lock piece is fixed by engaging and locking into the inner circumferential groove at the inner side of the tank, there is a drawback that the contact area between the lock piece and the inner circumferential groove is worn out and debris is generated when the lock piece is engaged. .

On the other hand, in tanks where a tank cap with a level meter is attached to the tank inlet,
As shown in FIG. 1, a float 6 is disposed inside a cup-shaped filter 5 which is suspended by hooking a mouth flange 4 to a filter receiver 3 in an inlet 2 of a tank 1. moves up and down along the float rail 7 in accordance with the amount of stored oil to rotate the screw rail 8 arranged at the center in the axial direction, and a pointer 9 is attached to the upper part of the screw rail 8. An oil amount display scale is formed on the cap 10.

By the way, in the conventional configuration in which a tank cap with a level meter is attached to the tank inlet, in addition to the generation of debris due to the wear, the shaking of the tank also causes the filter to sway and dance, resulting in float failure. There was a problem that the movement of the pointer was disturbed due to shaking or dancing.

The present invention has been developed in view of these circumstances, and eliminates wear on the contact area between the filter and the inner periphery of the tank inlet by preventing the filter from shaking or dancing without providing additional members to the filter. As a result, it is possible to prevent the stored liquid from being contaminated by debris caused by the above-mentioned wear, and furthermore, in cases where a cap with a level meter is attached to the tank inlet, the tank note is designed to ensure that the pointer operates accurately. The purpose is to provide an inlet filter holding device.

In order to achieve the above object, a filter holding device for a tank inlet according to the present invention is provided with a filter holder on the inner periphery of the tank inlet to which a cap is attached;
In a filter holding device for a tank inlet in which a mouth flange of a cup-shaped filter is hung from the filter holder and supported, when the cap is attached to the tank inlet, the cap comes into contact with the upper side of the mouth flange of the cup-shaped filter. A biasing body for biasing and holding the mouth flange of the filter toward the filter receiver is provided on the lower side of the cap that is inserted into the tank inlet.

The present invention will be explained in detail below with reference to the drawings. FIG. 2 is a longitudinal sectional view of a tank inlet showing a first embodiment of the present invention. This embodiment relates to a system in which a cap with a level meter is provided at the tank inlet. In FIG. 2, reference numeral 21 is a fuel tank, 22 is an inlet, and 23 is a cap attached to this inlet 22. A float rail 24 is provided to protrude downward, and a screen is provided in the vertical direction at the center of this float rail 24. A screw rail 25 is rotatably arranged, and this screw rail 2
A pointer 26 is provided at the upper end of 5. A float 27 is inserted into the float rail 24 so as to be able to move up and down.
The screw rail 25 is designed to rotate by the vertical movement of the screw rail 25. Also, the top surface of the cap 23 is
The pointer 26 of the screw rail 25 is formed so that it can be seen through, and is provided with an oil level display scale, and the screw rail 25 rotates as the float 27 moves up and down depending on the amount of oil, and the pointer 26 moves up and down. It is configured to indicate a predetermined oil amount display scale on the cap 23. Further, a filter receiver 28 is attached to the inner circumference of the inlet 22, and a mouth flange 30 of a cup-shaped filter 29 is hooked to the filter receiver 28, so that the filter 29 has its opening oriented in the vertical direction. and is suspended vertically within the fuel tank 21. And this filter 2
9, the float rail 24, screw rail 25, and float 27 are arranged.

The cap 23 has its float rail 24
It has a cylindrical holding body 31 that holds the upper part of the holding body 31, and a plurality of pressing leaf springs 32 are fixedly provided downward on the same circumference of the outer circumference of this holding body 31. This pressing leaf spring 32 has a pressing surface formed on its lower surface to apply a downward biasing force, and when the cap 23 is attached, the pressing surface of this leaf spring 32 is at the mouth of the filter 29 hooked to the filter receiver 28. The flange 30 is pressed and crimped onto the filter receiver 28 by a biasing force to be held therein.

In such a configuration, the cap 23 is connected to the inlet 2.
2, the pressing surface of the pressing plate spring 32 fixed on the outer periphery of the pressing plate spring 32 will be attached to the filter holder 2 as described above.
Mouth flange 30 of filter 29 hooked to 8
Since the opening flange 30 is pressed and held by the filter receiver 28 with a biasing force, the filter 29 will not shake or dance even if the fuel tank 21 is shaken. As a result, the contact portion between the mouth flange 30 of the filter 29 and the filter receiver 28 is not worn out, and generation of debris due to this wear is prevented, and contamination of the stored oil by debris is prevented. Furthermore, as the filter 29 is prevented from shaking or dancing as described above, the float 27 disposed inside the filter 29 can stably move up and down according to the oil amount, allowing accurate oil amount indication. be.

FIG. 3 is a longitudinal sectional view of a tank inlet showing a second embodiment of the present invention, with the upper part of the cap omitted.
This embodiment is the same as the first embodiment, with the addition of a wear-preventing collar. That is, in this second embodiment, a collar 33 is slidably disposed on the upper surface of the mouth flange 30 of the filter 29 in the first embodiment, and the pressing leaf spring 32 of the cap 23 is attached to the filter through this collar 33. It is configured to abut against the receiver 28. Further, the collar 33 has a cylindrical portion 34 for position regulation, and is inserted into the inner periphery of the filter 29. By doing so, the contact area between the mouth flange 30 of the filter 29 and the pressing side is increased, and wear of this contact portion can be further prevented and generation of debris can be suppressed.

4 and 5 show a third embodiment of the present invention, FIG. 4 is a vertical sectional view of the tank inlet of this embodiment, and FIG. 5 is a plan view showing the pressing leaf spring of FIG. 4. It is. This embodiment relates to a normal cap type without a level meter as in the first and second embodiments. In each of the above figures, reference numeral 35 is a cap, and the base end of a pressing leaf spring 36 is fixed to the lower surface of the cap with screws or the like. This pressing leaf spring 36 is
The front end of the base is bifurcated into two pressing pieces 36a, 3.
6a, and the pressing pieces 36a,
36a slightly descends downward and then extends forward to apply a downward biasing force, and when the cap 35 is attached, the pressing surfaces of the pressing pieces 36a, 36a press against the filter hooked on the filter receiver 28. 29
The upper surface of the opposing edge of the mouth flange 30 is pressed downward to press and hold the mouth flange 30 on the filter receiver 28.

FIG. 6 is a longitudinal sectional view of a tank inlet showing a fourth embodiment of the present invention. This example uses cap 3
A rod 37 is projected downward from the lower surface of the cap 35, a flange 38 is fixed to the lower end of the rod 37, and a disc-shaped presser plate 39 is loosely fitted to the rod 37 to prevent the rod 37 from interfering with the lower surface of the cap 35. A coil spring 40 wound around and interposed around 37 biases the holding plate 39 downward. When the cap 35 is attached, the presser plate 39 comes into contact with the mouth flange 30 of the filter 29 hooked on the filter receiver 28, and the presser plate 39 is urged downward by the coil spring 40, so that the mouth flange 30 Press down to press the opening flange 30 onto the filter receiver 28.
It is designed to hold.

Thus, according to the present invention, the cup-shaped filter is crimped and held without providing an additional member to prevent the filter from swinging or dancing, thereby eliminating wear at the contact portion between the filter and the inner circumference of the tank. , it is possible to prevent the stored liquid from being contaminated by debris caused by the abrasion, and in the case of a system in which a cap with a level meter is attached to the tank inlet, shaking and dancing of the filter can be prevented. It has the advantage that the finger can act accurately depending on the stored liquid. Furthermore, the present invention allows the filter to be made free or fixed in conjunction with the attachment and detachment of the cap, and when the cap is removed, the filter becomes free, making it easy to clean the filter.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing a tank inlet of a conventional type in which a cap with a level meter is attached, Fig. 2 is a longitudinal cross-sectional view showing a tank inlet according to the first embodiment of the present invention, and Fig. 3 is a vertical sectional view showing the tank inlet according to the second embodiment of the present invention with the upper part of the cap omitted; FIGS. 4 and 5 are according to the third embodiment of the present invention; FIG. 4 is a tank inlet FIG. 5 is a plan view showing the pressing leaf spring of FIG. 4, and FIG.
The figure is a longitudinal sectional view of a tank inlet showing a fourth embodiment of the present invention. 21...Fuel tank, 22...Inlet, 23...
... Cap, 28 ... Filter receiver, 29 ... Filter, 32 ... Pressing plate spring, 30 ... Filter mouth flange, 35 ... Cap, 36 ...
Pressing leaf spring, 39...pressing plate, 40...coil spring.

Claims (1)

[Scope of utility model registration request] In a filter holding device for a tank inlet in which a filter receiver is provided on the inner periphery of a tank inlet to which a cap is attached, and a mouth flange of a cup-shaped filter is hung on the filter receiver to suspend and support the filter, the cap is attached to the tank inlet. When installed, a biasing body that comes into contact with the upper side of the mouth flange of the cup-shaped filter and presses and holds the mouth flange of the filter toward the filter receiver is attached to the cap inserted into the tank inlet. A filter holding device for a tank inlet, characterized in that it is provided on the lower side of the tank.