JP3700652B2 - Liquid level detector tank mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure for mounting a liquid level detector for detecting a liquid level in a tank to a tank.
[0002]
[Prior art]
This type of mounting structure is described in Japanese Patent Application Laid-Open No. 10-26552. As shown in FIG. 4, in the liquid level detector 30 in the groove 26 of the plate-shaped mounting member 20 provided on the inner surface of the tank 10. The liquid level detector 30 is positioned at a predetermined position of the mounting member 20 by inserting the provided projection 36. Further, by engaging a claw 37 provided on the liquid level detector 30 and elastically deforming with a receiving portion 27 provided on the mounting member 20, the protrusion 36 is prevented from coming out of the groove 26. .
[0003]
[Problems to be solved by the invention]
However, in the above conventional mounting structure, the positioning mechanism using the projections 36 and the grooves 26 and the removal preventing mechanism using the claw 37 and the receiving portion 27 are separately provided. Therefore, the mounting structure of the liquid level detector 30 to the tank 10 is provided. Will become larger.
[0004]
Further, in the above conventional mounting structure, since it is necessary to provide the receiving member 27 with a complicated protrusion shape on the mounting member 20, the mounting member 20 must be manufactured by injection molding of a complicated resin of the mold. The cost was high. In addition, production by press working cannot be performed, and production means are limited.
[0005]
In view of the above points, an object of the present invention is to downsize the mounting structure of a liquid level detector to a tank, and to reduce the cost by facilitating manufacturing.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, the liquid level detector (30) configured to emit an output in accordance with the elevation of the liquid level in the tank (10) is supplied to the tank (10). In the mounting structure, a plate-shaped mounting member (20) provided with a through hole (21) extending in one direction is provided in the tank (10), and the liquid level detector (30) includes A protrusion-like projecting member (32) that can be inserted into the through hole (21), an enlarged hole portion (22) that expands the through hole (21) in a width direction substantially orthogonal to one direction, and a width direction The projecting member (32) has a width dimension (L2) equivalent to the width dimension (L1) of the reduction hole section (23) from the liquid level detector (30). The projecting reduction projection (33) and the projecting end of the reduction projection (33) are larger than the width dimension (L1) of the reduction hole (23). It is comprised from the expansion protrusion (34) which protrudes with a large width dimension (L3), and an expansion hole part (22) and a reduction hole part (23) are formed in the inner peripheral surface (22a) of the expansion hole part (22). An elastic member (25) for closing the communication portion (24) is provided integrally with the mounting member (20), and the protruding member (32) is pressed against the elastic member (25) to be elastically deformed so that the communication portion (24) is opened. However, when the reduction protrusion (33) is inserted into the reduction hole (23) in one direction from the communication portion (24), and then the reduction protrusion (33) is stored in a predetermined position of the reduction hole (23). The elastic deformation of the elastic member (25) is released so as to close the communication portion (24) again.
[0007]
According to this, the liquid level detector (30) can be positioned in the tank (10) by storing the reduction projection (33) in the reduction hole (23). Moreover, in the state accommodated in this way, since a communication part (24) is obstruct | occluded by an elastic member (25), a reduction | restoration protrusion (33) slips out of a reduction | decrease hole part (23) from a communication part (24). Can be prevented. Moreover, in the state which accommodated the reduction | restoration protrusion (33) in the reduction | decrease hole part (23), the periphery of the reduction | decrease hole part (23) among attachment members (20) is an expansion protrusion (34) and a liquid level detector (30). ) Since it is sandwiched between the main body and the reduction projection (33), it is possible to prevent the reduction projection (33) from slipping out of the reduction hole (23).
[0008]
In the mounting structure of the present invention, the reduced hole portion (23) for positioning and the elastic member (25) for preventing removal are integrally provided in one mounting member (20). One projecting member (32) is integrally provided with the reduced projection (33) and the enlarged projection (34) for preventing removal. Therefore, the positioning of the liquid level detector (30) into the tank (10) and the prevention of disconnection can be realized only by providing the mounting member (20) and the protruding member (32). The mounting structure can be greatly reduced in size as compared with the conventional structure provided for.
[0009]
Moreover, according to the present invention, the conventional receiving portion having a complicated shape can be eliminated, and the mounting member (20) having the through hole (21) and the elastic member (25) can be easily manufactured by pressing the plate material. Therefore, the manufacturing of the mounting member (20) can be facilitated, and the cost can be reduced by facilitating the mold production.
[0010]
According to the present invention, as described in claim 2, it is possible to easily form the elastic member (25) with a plate thickness equal to or less than the plate thickness (20t) of the mounting member (20). Therefore, the mounting member (20) can be flattened compared to the conventional mounting member, and the mounting structure can be further reduced in size.
[0011]
In the invention according to claim 3, the width dimension of the reduction projection (33) is set substantially the same as the width dimension of the reduction hole (23), and the length of the reduction projection (33) in the one direction is set. The dimension (L5) is set to be substantially the same as the length dimension (L6) of the reduction hole (23), and the protrusion length (L4) of the reduction protrusion (33) is set to the plate thickness (20t) of the mounting member (20). It is characterized by being set to be substantially the same.
[0012]
As a result, the reduction projection (33) can be accommodated in a state of being fitted to a predetermined position of the reduction hole (23), so that the backlash of the reduction projection (33) with respect to the reduction hole (23) can be eliminated. It is possible and suitable.
[0013]
In addition, the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
In the present embodiment, the mounting structure of the present invention is applied to a fuel tank mounting structure of a liquid level detector that emits an output in accordance with the lifting and lowering of the float accompanying the lifting and lowering of the fuel level in the fuel tank of the vehicle. It is applied.
[0015]
1 is a perspective view showing a plate-like holder (attachment member) 20 provided on an inner surface 10a of a fuel tank 10, and an arrow in the figure indicates an embodiment of the present invention. The vertical direction of the fuel tank 10 in the state mounted in the vehicle is shown. The holder 20 is provided with a through hole 21 having a shape extending in the vertical direction. And the through-hole 21 is comprised from the expansion hole part 22 expanded in the width direction of the holder 20 substantially orthogonal to an up-down direction, and the reduction | decrease hole part 23 contracted in the width direction.
[0016]
Further, the inner peripheral surface 22 a of the enlarged hole portion 22 is integrally provided with an elastic member 25 that closes the communication portion 24 between the enlarged hole portion 22 and the reduced hole portion 23. The elastic member 25 of the present embodiment is formed in a dogleg shape that extends in the up-down direction and is bent toward the communicating portion 24, and elastically extends in the width direction of the holder 20 in the enlarged hole portion 20. It is formed to be deformable.
[0017]
The holder 20 is manufactured into a shape having a through hole 21 and an elastic member by pressing or molding a resin plate material having a plate thickness of about 1 mm to 5 mm and a thickness of 20 t. The plate thickness of the elastic member 25 is the same as that of the holder 20.
[0018]
FIG. 2 is a perspective view showing the liquid level detector 30 attached to the holder 20. The detection mechanism of the liquid level detector 30 is the same as the structure of the liquid level detector 30 in the above publication. The electrical components (not shown) provided in the case 31 are converted into electrical changes and output.
[0019]
Specifically, the sliding contact arranged in contact with any one of the plurality of resistance wires in the case 31 comes to slide on the plurality of resistance wires in conjunction with the displacement of the float. ing. Each of the plurality of resistance wirings has different electrical resistances, and any one of the resistance wirings is selected according to the displacement of the float to convert the mechanical displacement into an electrical change and output it. is there.
[0020]
A projecting protruding member 32 that can be inserted into the through hole 21 is integrally formed on the outer surface 31 a of the resin case 31. The projecting member 32 includes a reduction protrusion 33 protruding from the case 31 with a width dimension L2 equivalent to the width dimension L1 of the reduction hole 23, and a width dimension L1 of the reduction hole 23 from the protrusion end of the reduction protrusion 33. Is formed in a T-shaped cross section including an enlarged protrusion 34 protruding with a large width dimension L3.
[0021]
The protrusion length L4 of the reduction protrusion 33 is formed to be equal to or longer than the plate thickness 20t of the holder 20. In addition, an extended portion 35 that extends downward with substantially the same width as the reduced protrusion 33 is formed at the lower end of the protruding member 32.
[0022]
FIG. 3 is a view taken in the direction of the arrow A in FIGS. 1 and 2 for explaining the procedure for attaching the liquid level detector 30 to the holder 20. The attachment procedure will be described below with reference to FIG.
[0023]
First, as illustrated in FIG. 3A, the protruding member 32 is inserted into the portion 22 b of the enlarged hole portion 22 located immediately above the reduced hole portion 23 from the back side of the paper surface of FIG. In the state of FIG. 3A, the outer surface 31 a of the case 31 is in contact with the holder 20, and the enlarged protrusion 34 protrudes from the surface of the holder 20 to the front side of the paper surface.
[0024]
Next, as shown in FIG. 3B, when the protruding member 32 is slid downward, the extending portion 35 comes into contact with the dog-shaped portion 25 a of the elastic member 25. When the sliding member is further slid downward, the elastic member 25 is elastically deformed in the width direction so as to be pressed against the reducing protrusion 33 to open the communication portion 24. When the slide is further moved downward, the reduction projection 33 is inserted into the reduction hole 23 from the communication portion 24.
[0025]
Then, as shown in FIG. 3C, when the extending portion 35 is slid to a predetermined position where it abuts against the lowermost portion of the reducing hole portion 23, the elastic member 25 is separated from the reducing protrusion 33, and the elastic deformation is released. Thus, the communication portion 24 is closed again. Thereby, the reduction protrusion 33 is completely stored in the predetermined position of the reduction hole 23, and the attachment of the liquid level detector 30 to the holder 20 is completed.
[0026]
As described above, according to the present embodiment, the liquid level detector 30 can be positioned in the tank 10 by storing the reduction projection 33 in the reduction hole 23. Further, in the accommodated state, the communication portion 24 is blocked by the elastic member 25, so that the reduction protrusion 33 can be prevented from slipping out of the reduction hole portion 23 from the communication portion 24. Further, in the state in which the reduction protrusion 33 is housed in the reduction hole 23, the holder 20 is sandwiched between the expansion protrusion 34 and the case 31, so that the reduction protrusion 33 moves outward from the reduction hole 23. It can be prevented from coming out.
[0027]
In the mounting structure of the present embodiment, the reduction hole 23 for positioning and the elastic member 25 for prevention of removal are integrally provided in one holder 20, and the reduction projection 33 for positioning and the removal are provided. One projecting member 32 is integrally provided with an enlarged projection 34 for prevention. Therefore, it is possible to realize positioning and prevention of removal of the liquid level detector 30 in the tank 10 only by providing the holder 20 and the protruding member 32, and an attachment structure as compared with the conventional structure provided with a positioning mechanism and a prevention mechanism separately. Can be greatly reduced in size.
[0028]
Moreover, according to the present invention, the holder 27 having the through-hole 21 and the elastic member 25 can be removed by eliminating the conventional complicated shape receiving portion 27 and by easily forming a mold or pressing a plate material. Since it can be manufactured easily, the manufacturing of the holder 20 can be facilitated, the manufacture of the mold can be facilitated, and the cost can be reduced by the easy manufacture of the mold.
[0029]
A specific example of the size of each part in the present embodiment will be described below. The width dimension L2 of the reduction projection 33 is set slightly larger than the width dimension L1 of the reduction hole part 23. As a result, the reduction projection 33 is fitted into the reduction hole 23.
[0030]
Further, the protrusion length L4 of the reduction protrusion 33 is set slightly smaller than the plate thickness 20t of the holder 20. Accordingly, in the state of FIG. 3C, the periphery of the reduced hole portion 23 of the holder 20 is fitted between the enlarged protrusion 34 and the outer surface 31 a of the case 31.
[0031]
With the above dimension setting, the reduction protrusion 33 can be accommodated in a state of being fitted to a predetermined position of the reduction hole 23, so that the backlash of the reduction protrusion 33 with respect to the reduction hole 23 can be eliminated.
[0032]
Further, the length dimension L5 in the vertical direction of the reduction projection 33 is set slightly smaller than the length dimension L6 of the reduction hole 23. Thereby, in the state of FIG.3 (c), the elastic member 25 can be open | released smoothly from an elastic deformation state.
[0033]
(Other embodiments)
In carrying out the present invention, the holder 20 may be provided on a lid that closes the opening of the fuel tank 10.
[0034]
Further, in carrying out the present invention, the mounting structure of the present invention may be applied to the liquid level detector 30 configured integrally with the fuel pump installed in the fuel tank 10.
[0035]
Moreover, in the said embodiment, although the holder 20 was resin, this invention is not restricted to this, Of course, even if the holder 20 is metal, this invention is applicable. Similarly, the projecting member 32 is not limited to resin, and it goes without saying that the present invention can be applied even if it is made of metal.
[Brief description of the drawings]
FIG. 1 is a perspective view of a holder according to an embodiment of the present invention.
FIG. 2 is a perspective view of a liquid level detector attached to the holder of FIG.
3 is a view taken from the direction of the arrow A in FIGS. 1 and 2 for explaining a procedure for attaching the liquid level detector in FIG. 2 to the holder in FIG. 1, and (a) is a state in which a protruding member is inserted into an enlarged hole portion; (B) is an A arrow view of the state in which the elastic member is elastically deformed by the protruding member, and (c) is an A arrow view of the state in which the mounting of the liquid level detector is completed. .
FIG. 4 is an exploded perspective view showing a tank mounting structure of a conventional liquid level detector.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Fuel tank, 20 ... Holder (mounting member), 21 ... Through-hole,
22 ... Enlarged hole part, 23 ... Reduced hole part, 25 ... Elastic member, 30 ... Liquid level detector,
32 ... Projection member, 33 ... Reduction projection, 34 ... Expansion projection,
L1: width dimension of the reduction hole, L2: width dimension of the reduction protrusion,
L3: Width dimension of the enlarged protrusion.

Claims (3)

A mounting structure of the liquid level detector (30) adapted to emit an output in accordance with the elevation of the liquid level in the tank (10) to the tank (10),
In the tank (10), a plate-like attachment member (20) provided with a through hole (21) extending in one direction is provided,
The liquid level detector (30) includes a protruding protrusion (32) that can be inserted into the through hole (21).
The through hole (21) includes an enlarged hole portion (22) that expands in the width direction substantially orthogonal to the one direction, and a reduced hole portion (23) that decreases in the width direction,
The projecting member (32) includes a contraction projection (33) projecting from the liquid level detector (30) with a width dimension (L2) equivalent to the width dimension (L1) of the contraction hole section (23), An expansion protrusion (34) protruding from the protruding end of the reduction protrusion (33) with a width dimension (L3) larger than the width dimension (L1) of the reduction hole part (23);
An elastic member (25) for closing the communication portion (24) between the enlarged hole portion (22) and the reduced hole portion (23) is formed on the inner peripheral surface (22a) of the enlarged hole portion (22). (20) integrated with,
While the projecting member (32) is pressed against the elastic member (25) to be elastically deformed so that the communication part (24) is opened, the reduction projecting part (33) is moved in the one direction from the communication part (24). Inserted into the reduced hole (23),
After that, when the reduction protrusion (33) is housed in a predetermined position of the reduction hole (23), the elastic deformation of the elastic member (25) is released and the communication portion (24) is closed again. A tank mounting structure for a liquid level detector. The tank mounting structure for a liquid level detector according to claim 1, wherein the elastic member (25) is formed with a plate thickness equal to or less than a plate thickness (20t) of the mounting member (20). The width dimension (L2) of the reduction protrusion (33) is set to be substantially the same as the width dimension (L1) of the reduction hole part (23),
The length dimension (L5) in the one direction of the reduction protrusion (33) is set to be substantially the same as the length dimension (L6) of the reduction hole part (23),
3. The liquid level detection according to claim 1, wherein a protrusion length (L4) of the reduction protrusion (33) is set to be substantially the same as a plate thickness (20t) of the attachment member (20). The tank mounting structure.

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