JP2023022739A - filter device - Google Patents

Abstract

To facilitate positioning of a component.SOLUTION: A filter device comprises: a bottomed cylindrical case; a head that covers an opening part of the case and has a flow passage hole serving as a flow passage of liquid; a connecting member which is provided at the head and makes the liquid flow into a space formed of the case and the head through the flow passage hole; and a fastening member for fixing the connecting member to the head. The fastening member has a head part, a circular column part thinner than the head part, and a first male screw part provided on an external peripheral face of the circular column part. The head has a first female screw part which is screwed with the first male screw part. The connecting member has a cylindrical part which abuts on the head on one end face and abuts on the head part on the other end face, the circular column part being inserted into a cylindrical hollow part. A circular ring-shaped first seal member is arranged between the cylinder part and the head, and a circular ring-shaped second seal member is arranged between the cylindrical part and the circular column part.SELECTED DRAWING: Figure 2

Description

The present invention relates to filter devices.

Patent Document 1 discloses a fuel filter device for an engine.

Japanese Utility Model Laid-Open No. 58-25662

As shown in FIG. 9, the fuel filter device disclosed in Patent Literature 1 has a connector 140 communicating with a fuel tank provided on the upper lid by bolts 151 . The connector 140 has a tubular portion 142 into which a hose is inserted protrudes from a cylindrical tubular portion 141 into which a bolt 151 is inserted.

In the fuel filter device disclosed in Patent Document 1, when the bolt 151 is screwed into the upper lid 120 , the connector 140 may rotate together with the bolt 151 . As a result, the position of the tubular portion 142 changes as the connector 140 rotates, and there is a possibility that the tubular portion 142 cannot be positioned.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a filter device in which parts can be easily positioned.

In order to solve the above problems, the filter device according to the present invention includes, for example, a cylindrical case with a bottom and a head covering an opening of the case, the head having a channel hole serving as a liquid channel. and a connecting member provided on the head, and a fastening member for fixing the connecting member to the head, the fastening member comprising a head, a cylindrical portion thinner than the head, and the cylindrical portion a first male threaded portion provided on the outer peripheral surface of the head, the head having a first female threaded portion to which the first male threaded portion is screwed, and one end face of the connecting member being connected to the head It has a tubular portion with the other end face abutting against the head, and the columnar portion is inserted into the hollow portion of the tubular portion between the tubular portion and the head. is provided with an annular first sealing member, and an annular second sealing member is provided between the cylindrical portion and the cylindrical portion.

According to the filter device of the present invention, the columnar portion of the fastening member is inserted into the hollow portion of the tubular portion of the connecting member, and the first male threaded portion of the fastening member is screwed to the first male threaded portion of the head. One end surface of the portion abuts the head, and the other end surface abuts the head. An annular first seal member is provided between the tubular portion and the head, and an annular second seal member is provided between the tubular portion and the columnar portion. As a result, the tightening torque for attaching the fastening member to the head is reduced, and the connecting member is less likely to rotate even when the fastening member is rotated. This makes it possible to easily position the connecting member (in particular, position it in the rotational direction).

A first hole that communicates with the flow path hole is provided inside the cylindrical portion, and a portion where the cylindrical portion and the cylindrical portion overlap is provided with an inner peripheral surface of the cylindrical portion and the cylindrical portion. At least one of the outer peripheral surfaces of the portion may be provided with a groove communicating with the first hole, and the second seal member may be provided between the groove and the head. Thereby, the liquid flowing inside the groove can be prevented from leaking from between the tubular portion and the head portion.

The cylindrical portion is provided with a first coupling portion, the head is provided with a second coupling portion having a shape corresponding to the first coupling portion, and the first coupling portion and the It may be connected to the second connecting portion. This makes it possible to easily position the cylindrical portion in the rotational direction.

The first coupling portion is at least one first recess provided on the outer peripheral surface of the cylindrical portion, the second coupling portion is a first protrusion provided on the head, and the first protrusion is provided on the head. may be inserted into the first recess to couple the first coupling portion and the second coupling portion. As a result, the concave portion also serves as a lightening, preventing deterioration in the dimensional accuracy of the inner peripheral surface of the cylindrical portion, and preventing fuel leakage and the like.

The head is provided with a second hole into which the tubular portion is inserted, the first coupling portion is a first plane provided on the outer peripheral surface of the tubular portion, and the second coupling portion The portion may be a second plane that abuts the first plane, and the second hole may have the second plane. This makes it possible to position the cylindrical portion in the rotational direction with a simple configuration.

A rotating member rotatably provided in the head is provided, and the head has a cylindrical third hole and a cylindrical shape having a diameter smaller than the inner diameter of the third hole provided on the bottom surface of the third hole. and a connecting hole connecting the third hole and the flow path hole, the connecting hole being provided inside the convex part, and one end of the connecting hole being at the tip surface of the convex part The rotating member is inserted into the third hole, and has a cylindrical insertion portion having an outer diameter substantially equal to the inner diameter of the third hole, and the bottom surface of the insertion portion is: A concave portion is provided, and the insertion portion is rotatable between a state in which a bottom surface of the insertion portion abuts against a tip of the convex portion and a state in which the concave portion and the convex portion overlap each other, and the convex portion An annular third sealing member may be provided on the outer peripheral surface of the portion, and the height of the third sealing member may be equal to or higher than the height of the convex portion. As a result, the rotary member can be rotated with a weak force when the rotary member is rotated to switch between inflow and non-inflow of the fuel.

A cylindrical nut abutting on the outer peripheral surface of the case is provided, the inner peripheral surface of the nut is provided with a second female threaded portion, and the head is provided with a second female threaded portion that is screwed into the second female threaded portion. 2 male threaded portions may be provided, the case may be provided with a second projection near an open end, and the head may be provided with a second recess into which the second projection is inserted. . This makes it possible to easily position the case in the rotational direction.

ADVANTAGE OF THE INVENTION According to this invention, positioning of components can be performed easily.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the outline of the filter apparatus 1 typically, (A) is a top view, (B) is a side view. 1 is a cross-sectional view showing an outline of a filter device 1; FIG. 4 is a cross-sectional view schematically showing a structure in which a fastening member 51 provides a connecting member 40 to the head 20; FIG. FIG. 3 is a perspective view schematically showing a state in which a fastening member 51 and a connecting member 40 are provided on the head 20, where (A) is a view seen obliquely from the front, and (B) is a view seen obliquely from below. . 6 is a diagram showing an outline of a rotating member 60; FIG. 4 is a schematic cross-sectional view showing a state in which a rotating member 60 is provided in a hole 20b; FIG. 4 is a schematic cross-sectional view showing a state in which a rotating member 60 is provided in a hole 20b; FIG. 3A and 3B are diagrams showing an outline of a structure for positioning a case 10 and a head 20, where (A) is a perspective view of the head 20 and (B) is a perspective view of the case 10; It is a figure which shows the outline of the filter apparatus 100 concerning a prior art. 2 is a cross-sectional view showing an outline of the filter device 2; FIG. (A) is a schematic perspective view showing a state in which a fastening member 51 and a connecting member 40A are provided on the head 20A; It is a perspective view.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following, the filter device of the present invention will be described using a fuel filter as an example in which fuel used in an internal combustion engine is used as a liquid. However, the present invention is applicable to various types of filter devices other than fuel filters. and various liquids other than fuel can be used.

<First embodiment>
FIG. 1 is a diagram schematically showing the outline of the filter device 1, where (A) is a plan view and (B) is a side view. Hereinafter, the direction along the center line ax is defined as the z-direction, and the directions perpendicular to the z-direction are defined as the x-direction and the y-direction.

The filter device 1 mainly has a case 10, a head 20, a nut 30, a connecting member 40, fastening members 51 and 52, a rotary member 60, and a filter element 70 (see FIG. 2).

The case 10 has a cylindrical shape with a bottom, and has an open end 11c (see FIG. 2) on the +z side. The head 20 covers the open end 11c of the case 10. As shown in FIG. A cylindrical nut 30 is in contact with the outer peripheral surface of the case 10 , and the case 10 is fixed to the head 20 by attaching the cylindrical nut 30 to the head 20 . The case 10, the head 20, and the nut 30 are formed using highly corrosion-resistant materials (eg, stainless steel, iron surface-treated with plating or the like, aluminum alloy, synthetic resin).

The head 20 is provided with connecting members 40 and 45 , fastening members 51 and 52 and a rotating member 60 . The fastening member 51 secures the connecting member 40 to the head 20 , and the fastening member 52 secures the connecting member 45 to the head 20 . The connecting member 40 and the connecting member 45 have the same shape and structure, and the fastening member 51 and the fastening member 52 have the same shape and structure. The connecting member 40, the fastening members 51 and 52, and the rotating member 60 are formed using a highly corrosion-resistant material (for example, stainless steel).

FIG. 2 is a cross-sectional view taken along line AA of FIG. 1A, which is a cross-sectional view showing an outline of the filter device 1. As shown in FIG. In addition, in FIG. 2, hatching representing a cross section is omitted for some parts. Also, in FIG. 2, the flow of fuel is indicated by a chain double-dashed arrow.

The case 10 has a cylindrical case body 11 with a bottom and a drain 12 provided on the bottom surface 11 a of the case body 11 . A head 20 is provided so as to cover the opening end 11c of the case body 11. As shown in FIG.

The nut 30 has a projection 30a and a female threaded portion 30b. The protrusion 30 a abuts on a protrusion 11 b provided on the outer peripheral surface of the case body 11 . The female threaded portion 30 b is provided on the inner peripheral surface of the nut 30 . The case 10 is provided on the head 20 by screwing the female threaded portion 30b into the male threaded portion 20i provided on the outer peripheral surface of the cylindrical portion 20h of the head 20 .

A filter element 70 is provided in the space formed by the case 10 and the head 20 . The filter element 70 mainly has a filter medium 71 , an inner cylinder 72 and plates 73 and 74 . The filter medium 71 is a cylindrical member having openings at both ends formed by pleating a sheet-like filter paper made of synthetic resin, paper, or the like, and connecting the both ends of the pleated filter paper. The inner cylinder 72 is formed using a highly corrosion-resistant material (for example, stainless steel) and is provided inside the filter medium 71 . A plurality of holes 72 a are formed in substantially the entire area of the inner cylinder 72 to communicate the outside and the inside of the inner cylinder 72 .

A plate 73 is provided at one end of the filter medium 71 and the inner cylinder 72, and a plate 74 is provided at the other end. The plates 73 and 74 are substantially cylindrical members with bottoms, and are integrated with the filter medium 71 and the inner cylinder 72 with an adhesive.

The filter element 70 is provided on the head 20 by inserting the tubular portion 20j into the plate 74. As shown in FIG. A sealing member 85 is provided between the cylindrical portion 20j and the plate 74. As shown in FIG. The seal member 85 is a member made of an elastic soft material (such as rubber) to prevent fluid from leaking, such as an O-ring.

The head 20 is provided with an inflow portion 20a that serves as a liquid flow path. Further, the head 20 is provided with a hole 20b (corresponding to the third hole of the present invention) in which the rotary member 60 is provided. The inflow portion 20a and the hole 20b are communicated with each other through a connecting hole 20e. The hole 20b, the connecting hole 20e and the rotary member 60 will be detailed later.

Further, the head 20 is provided with a connecting member 40 and a fastening member 51 , and a connecting member 45 and a fastening member 52 . The head 20 has a channel hole (first channel hole) connected to the connecting member 40 and a channel hole (second channel hole) connected to the connecting member 45 . The first channel hole and the second channel hole are holes that are provided inside the head 20 and serve as channels for the liquid. (see FIG. 8), and the second passage hole includes the hollow portion of the cylindrical portion 20j and the outflow portion 20q.

The connecting member 40 allows the fuel to flow into the space S in which the filter element 70 is provided through the first flow passage hole. The fuel that has flowed into the space S is filtered by the filter medium 71 and flows out to the hollow portion of the inner cylinder 72 . The connecting member 45 causes the fuel filtered by the filter element 70 to flow out of the filter device 1 through the second flow path hole and the outflow portion 52 a provided in the fastening member 52 .

FIG. 3 is a cross-sectional view schematically showing a structure in which the fastening member 51 provides the connecting member 40 to the head 20. As shown in FIG. The structure in which the fastening member 52 provides the connection member 45 to the head 20 is the same as the structure in which the fastening member 51 provides the connection member 40 to the head 20, so the description is omitted.

The connecting member 40 has a tubular portion 41 and a hose plug 42 provided on the tubular portion 41 . The hose plug 42 is a member provided with a hose provided in a fuel tank (not shown), and protrudes radially outward from the cylindrical portion 41 . The hollow portion of the tubular portion 41 and the hollow portion of the hose plug 42 communicate with each other. Therefore, the fuel stored in the fuel tank is supplied to the connecting member 40 from the tank.

The fastening member 51 has a head portion 51a, a cylindrical portion 51b thinner than the head portion 51a, and a male screw portion 51c provided on the outer peripheral surface of the cylindrical portion 51b. The head 20 has a female threaded portion 20c, and the male threaded portion 51c is screwed into the female threaded portion 20c.

When the male threaded portion 51c and the female threaded portion 20c are screwed together and the fastening member 51 is provided on the head 20, one end surface 41a of the cylindrical portion 41 contacts the head 20, and the other end surface 41b contacts the head portion 51a. touch. Thereby, the connecting member 40 is provided on the head 20 . At this time, the cylindrical portion 51 b is inserted into the hollow portion of the cylindrical portion 41 .

An annular sealing member 81 is provided between the tubular portion 41 and the head 20 . An annular sealing member 82 is provided between the cylindrical portion 41 and the cylindrical portion 51b. The sealing members 81 and 82 are formed using an elastic soft material (eg, rubber) and are members that prevent fluid from leaking, such as O-rings. The sealing members 81 and 82 fix the tubular portion 41 , that is, the connecting member 40 to the head 20 and the fastening member 51 .

Since the sealing members 81 and 82 are O-rings, even if the sealing members 81 and 82 are provided, the tightening torque for attaching the fastening member 51 to the head 20 does not increase.

An end surface 41a of the cylindrical portion 41 facing the head 20 is provided with a recess 41c in which a seal member 81 is provided. By providing the sealing member 81 between the tubular portion 41 and the head 20 , the fuel flowing through the connecting member 40 can be prevented from leaking from between the tubular portion 41 and the head 20 .

A hole 51e (corresponding to the first hole of the present invention) communicating with the inflow portion 20a is provided inside the cylinder 51b. The hole 51e communicates with the groove 51d. As a result, the groove 51d communicates with the inflow portion 20a, and the fuel flowing into the connecting member 40 flows into the inflow portion 20a.

A groove 51d is provided on the outer peripheral surface of the cylindrical portion 51b at the portion where the cylindrical portion 41 and the cylindrical portion 51b overlap. In the present embodiment, the groove 51d is provided on the outer peripheral surface of the columnar portion 51b, but the position of the groove is not limited to this, and at least one of the inner peripheral surface of the cylindrical portion 41 and the outer peripheral surface of the columnar portion 51b is provided. It is sufficient if a groove is provided.

The cylindrical portion 51b is provided with a recessed portion 51f in which the sealing member 82 is provided. The seal member 82 and the cylindrical portion 51b are provided between the groove 51d and the head portion 51a. Therefore, the fuel flowing through the groove 51d can be prevented from leaking from between the tubular portion 41 and the head portion 51a.

In this embodiment, the seal members 81 and 82 are O-rings, and the recesses 41c and 51f are provided with the seal members 81 and 82, respectively, but the seal members 81 and 82 are not limited to O-rings. For example, the sealing members 81 and 82 may be ring-shaped flat packings. Moreover, when the sealing members 81 and 82 are flat packings, the concave portions 41c and 51f are not essential.

4A and 4B are perspective views schematically showing a state in which the fastening member 51 and the connecting member 40 are provided on the head 20, where (A) is a view obliquely from the front, and (B) is a view obliquely from below. It is a diagram.

A concave portion 41 d is provided on the outer peripheral surface of the tubular portion 41 . The recess 41 d extends along the axis of the cylindrical portion 41 . Moreover, there is at least one recess 41d, and it is desirable that a plurality of recesses 41d be provided. In this embodiment, they are provided every 30 degrees.

The head 20 is provided with a projection 20d. The protrusion 20d and the recess 41d are coupled by inserting the protrusion 20d into the recess 41d. As a result, when the fastening member 51 is rotated to screw the male threaded portion 51c into the female threaded portion 20c, the cylindrical portion 41 can be prevented from rotating due to the fastening member 51.

Since the cylindrical portion 41 is thick, it is desirable to provide a hollow for maintaining dimensional accuracy. In the present embodiment, by providing the recess 41d on the outer peripheral surface of the tubular portion 41, the recessed portion 41d also serves as lightening, preventing deterioration of the dimensional accuracy of the inner peripheral surface of the tubular portion 41, and preventing fuel leakage and the like. be able to.

The recessed portion 41d has a semicircular cross-sectional shape, a wide entrance, and a taper with an inner diameter that decreases with distance from the entrance. The protrusion 20d has a shape corresponding to the recess 41d. That is, the protrusion 20d has a semi-cylindrical rod-like portion with a taper that is thicker at the base side and thinner toward the tip.

In the present embodiment, the projection 20d has a cylindrical base and a semi-cylindrical shape at the other portion, but the shape of the projection 20d is not limited to this. For example, the entire protrusion 20d may be cylindrical.

In the present embodiment, the tubular portion 41 is provided with the concave portion 41d and the head 20 is provided with the protrusion 20d. A first coupling portion, which is a protrusion or a recess, is provided on the cylindrical portion 41, a second coupling portion having a shape corresponding to the first coupling portion is provided on the head 20, and the first coupling portion and the second coupling portion are coupled. If possible.

Next, the hole 20b, the connecting hole 20e and the rotating member 60 will be described in detail. FIG. 5 is a schematic diagram of the rotating member 60. As shown in FIG. The rotating member 60 has a columnar insertion portion 61 to be inserted into the hole 20 b and a lever 62 provided on the insertion portion 61 . The lever 62 is provided on the +z side (upper side) of the insertion portion 61 and protrudes radially outward. As a result, the operator can grip the lever 62 and turn the rotary member 60 . A bottom surface 61a of the rotating member 60 is provided with a recess 61b.

6 and 7 are schematic cross-sectional views showing how the rotary member 60 is provided in the hole 20b. 6 shows a state in which the connecting hole 20e is not covered with the bottom surface 61a, and FIG. 7 shows a state in which the connecting hole 20e is covered with the bottom surface 61a.

The head 20 has a cylindrical hole 20b, a projection 20f, and a connecting hole 20e. The hole 20b has a hole 20m and a hole 20n provided in the bottom surface 20k of the hole 20m. The rotary member 60 is inserted into the hole 20m, and the bottom surface 61a contacts the bottom surface 20k.

The convex portion 20f is provided on the bottom surface 20l of the hole 20n and protrudes in the z direction from the bottom surface 20l toward the inside of the hole 20b. The height of the convex portion 20f is equal to or less than the depth of the bottom surface 20l, but preferably substantially the same as the depth of the bottom surface 20l.

The connecting hole 20e connects the hole 20b and the inflow portion 20a. The connecting hole 20e is provided inside the protrusion 20f along the z-direction, and one end opens to the tip surface of the protrusion 20f.

The insertion portion 61 is rotatably inserted into the hole 20b and has an outer diameter substantially equal to the inner diameter of the hole 20m. A sealing member 83 is provided on the outer peripheral surface of the inserting portion 61 to prevent fuel from leaking from between the hole 20b and the inserting portion 61 . The sealing member 83 is a member made of an elastic soft material (such as rubber) to prevent fluid from leaking, such as an O-ring.

In this embodiment, the sealing member 83 is an O-ring, and the sealing member 83 is provided in the concave portion 61c, but the sealing member 83 is not limited to an O-ring. For example, the sealing member 83 may be an annular flat packing. Also, if the seal member 83 is a flat packing, the recess 61c is not essential.

An annular sealing member 84 is provided on the outer peripheral surface of the convex portion 20f. The sealing member 84 is a member, such as an O-ring, which is made of an elastic soft material (such as rubber) and prevents fluid from leaking. The height of the sealing member 84 is equal to or higher than the height of the convex portion 20f, and the sealing member 84 contacts the bottom surface 61a. It is desirable that the height of the seal member 84 and the height of the projection 20f be approximately the same.

A state in which the recessed portion 61b and the protruding portion 20f overlap and the connecting hole 20e is not covered (see FIG. 6), and a state in which the bottom surface 61a contacts the tip of the protruding portion 20f and the connecting hole 20e is covered (see FIG. 7). , the lever 62 is used to rotate the insertion portion 61 inside the hole 20b. When the concave portion 61b and the convex portion 20f overlap and the connecting hole 20e is not covered (see FIG. 6), the fuel flowing into the inflow portion 20a flows through the connecting hole 20e, the concave portion 61b, the hole 20b and the hole 20o (see FIG. 8). ) into the space S. On the other hand, the fuel that has flowed into the inflow portion 20a does not flow into the space S when the connecting hole 20e is covered with the bottom surface 61a (see FIG. 7). In this way, it is possible to switch between allowing the fuel to flow into the space S and not allowing the fuel to flow into the space S simply by rotating the rotating member 60 .

Since the bottom surface 61a and the seal member 84 are only in contact with each other, resistance when rotating the insertion portion 61 is small. In particular, by using an O-ring as the seal member 84, the bottom surface 61a and the seal member 84 are in line contact, so the resistance during rotation is small. Therefore, the rotating member 60 can be rotated with a weak force.

8A and 8B are schematic diagrams showing a structure for positioning the case 10 and the head 20. FIG. 8A is a perspective view of the head 20, and FIG. 8B is a perspective view of the case 10. FIG. The opening end 11c of the case main body 11 is provided with a protrusion 11d that protrudes in the opposite direction (+z direction) to the bottom surface 11a along the center line ax. Further, the head 20 is provided with a recess 20p into which the projection 11d is inserted.

When the nut 30 is rotated while the projection 11b is in contact with the nut 30, and the male threaded portion 20i and the female threaded portion 30b are screwed together, and the case 10 is mounted on the head 20, the projection 11d fits into the recessed portion 20p. By inserting, the case 10 does not rotate together with the nut 30, and the case 10 and the head 20 are positioned in the circumferential direction. This makes it possible to easily position the drain 12 .

In this embodiment, four projections 11d and four recesses 20p are provided at 90-degree intervals, but the positions and numbers of the projections 11d and recesses 20p are not limited to this. Moreover, the shape of the projection 11d and the recess 20p is not limited to this.

Moreover, the protrusion 11d need not be provided at the opening end 11c, and may be provided near the opening end 11c. For example, the protrusion may be provided on the outer peripheral surface of the case body 11 near the open end 11c so as to protrude radially outward.

According to this embodiment, the cylindrical portion 51b of the fastening member 51 for fixing the connecting member 40 to the head 20 is inserted into the hollow portion of the cylindrical portion of the connecting member 40 through which the fuel flows into the space S. 41 and the head 20, and the seal member 82 is provided between the cylindrical portion 41 and the cylindrical portion 51b, the tightening torque for attaching the fastening member 51 to the head 20 does not increase. Therefore, by rotating the fastening member 51 while gripping the hose plug 42, the hose plug 42 can be easily positioned.

For example, in the filter device 100 according to the prior art shown in FIG. 145 are provided respectively. In the filter device 100, the connector 140 is fixed to the upper lid 120 and the bolt 151 by using plain washers 145 instead of the sealing members 81 and 82 of the present embodiment. However, in order to rotate the bolt 151 to deform the plain washer 145, a large tightening torque (approximately 40 N) is required. Positioning becomes difficult. In contrast, in the present embodiment, by using the seal members 81 and 82, the tightening torque can be reduced (approximately 20 N), and the tightening member 51 is rotated while gripping the hose plug 42. 42 can be easily positioned.

Further, according to the present embodiment, since the seal member 82 is provided between the groove 51d and the head portion 51a, the fuel flowing inside the groove 51d is prevented from flowing between the cylindrical portion 41 and the head portion 51a. You can keep it from leaking.

Further, according to the present embodiment, since the protrusion 20d is inserted into the recess 41d provided on the outer peripheral surface of the cylindrical portion 41, when the fastening member 51 is rotated and attached to the head 20, the connecting member 40 is You can keep it from rotating. Therefore, positioning of the hose plug 42 can be easily performed. In particular, by using the sealing members 81 and 82 to reduce the tightening torque of the fastening member 51, it is possible to reduce the size of the projection 20d and the recess 41d.

Further, according to the present embodiment, since the bottom surface 61a abuts the seal member 84, it is inserted between the state in which the bottom surface 61a abuts on the tip of the protrusion 20f and the state in which the recess 61b overlaps the protrusion 20f. When the portion 61 is rotated to switch between allowing and not allowing the fuel to flow into the space S, the rotating member 60 can be rotated with a weak force.

Further, according to the present embodiment, since the protrusions 11d are inserted into the recesses 20p, when the nut 30 is rotated to mount the case 10 on the head 20, the case 10 does not rotate together with the nut 30. Circumferential positioning with respect to the head 20, that is, positioning of the drain 12 can be easily performed.

In the present embodiment, the hole 20b is provided in the first flow hole, but the position of the hole 20b is not limited to this. including). For example, a hole 20b may be provided in the second channel hole (here, between the hollow portion of the cylindrical portion 20j and the outflow portion 20q).

<Second Embodiment>
In the first embodiment of the present invention, the hose plug 42 is positioned by inserting the protrusion 20d into the recess 41d, but the structure for positioning the hose plug 42 is not limited to this. A filter device 2 according to the second embodiment will be described below. The same reference numerals are assigned to the same parts as in the first embodiment, and the description thereof is omitted.

FIG. 10 is a cross-sectional view showing an outline of the filter device 2. As shown in FIG. Filter device 2 mainly includes case 10 , head 20</b>A, nut 30 , connecting member 40</b>A, fastening members 51 and 52 , rotating member 60 , and filter element 70 .

A connecting member 40A and a fastening member 51 are provided on the head 20A. The connecting member 40A has a tubular portion 41A and a hose plug 42 provided on the tubular portion 41A.

The hollow portion of the cylindrical portion 41A and the hollow portion of the hose plug 42 communicate with each other. Therefore, the fuel stored in the fuel tank is supplied from the tank to the cylindrical portion 41A and flows through the inflow portion 20a into the space S in which the filter element 70 is provided.

A seal member 81 is provided between the tubular portion 41A and the head 20 . A concave portion 41e in which a sealing member 81 is provided is provided on the end surface of the cylindrical portion 41A facing the head 20. As shown in FIG. A seal member 82 is provided between the cylindrical portion 41A and the cylindrical portion 51b.

FIG. 11A is a perspective view schematically showing a state in which the fastening member 51 and the connecting member 40A are provided on the head 20A, FIG. 11B is a perspective view of the essential parts of the head 20A, ) is a perspective view of the connecting member 40A.

The head 20A differs from the head 20 in that it has a hole 20r (corresponding to the second hole of the invention). One end of the tubular portion 41A is inserted into the hole 20r.

The tubular portion 41A has an octagonal prism shape, and has a plurality of flat surfaces 41f on its outer peripheral surface. When the tubular portion 41A is inserted into the hole 20r, the flat surface 41f contacts the flat surface 20s of the hole 20r. Therefore, when the fastening member 51 is rotated and attached to the head 20A, the connecting member 40A can be prevented from rotating. Therefore, the hose plug 42 can be positioned with a simple configuration.

The shape of the tubular portion 41A is not limited to the octagonal prism shape, and may have at least one flat surface 41f on the outer peripheral surface. For example, the cylindrical portion 41A may have a hexagonal shape, or may have a columnar shape in which a part of the outer peripheral surface is notched in a plane. Also, the number of planes 20s that the hole 20r has is not limited to this, and the number of planes 20s may be the same as the number of planes 41f.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and design changes and the like are also included within the scope of the gist of the present invention. .

Moreover, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. For example, the connecting member 40 and the fastening member 51 and their mounting structure to the head 20, the rotating member 60 and the mounting structure of the rotating member 60 to the head 20, and the mounting structure of the case 10 to the head 20 are implemented separately. Is possible. Further, for example, the projection 20d and the recess 41d are not essential for the connection member 40 and the fastening member 51 and their mounting structure to the head 20. 20 is also possible.

Also, part of the configuration of the embodiment can be replaced with the configuration of another embodiment, and it is possible to add, delete, or replace the configuration of the embodiment with another configuration.

In addition, in the present invention, the term "substantially" is not limited to the case of being exactly the same, but is a concept that includes errors and deformations to the extent that the identity is not lost. For example, "substantially orthogonal" is not limited to being strictly orthogonal, but is a concept that includes an error of, for example, several degrees. Further, for example, when simply expressing orthogonality, parallelism, coincidence, etc., not only cases of strictly orthogonality, parallelism, coincidence, etc., but also cases of approximately parallelism, approximately orthogonality, approximately coincidence, etc. are included.

In the present invention, the term "nearby" means including a certain range (which can be arbitrarily determined) near the reference position. For example, the term "near an edge" is a concept indicating that the area is a certain range near the edge and may or may not include the edge.

Reference Signs List 1: filter device 10: case 11: case main body 11a: bottom surface 11b: convex portion 11c: opening end 11d: protrusion 12: drain 20: head 20a: inlet portion 20b: hole 20c: female screw portion 20d: protrusion 20e: connecting hole 20f : Protruding portion 20h : Cylindrical portion 20i : Male threaded portion 20j : Cylindrical portions 20k, 20l : Bottom surface 20m, 20n : Hole 20o : Hole 20p : Concave portion 20q : Outflow portion 30 : Nut 30a : Protrusion 30b : Female threaded portions 40, 45 : Connecting member 41 : Cylindrical portions 41a, 41b : End faces 41c, 41d : Recess 42 : Hose plugs 51, 52 : Fastening member 51a : Head 51b : Cylindrical portion 51c : Male screw portion 51d : Groove 51e : Hole 51f : Recess 52a : Outflow portion 60 : Rotating member 61 : Insertion portion 61a : Bottom surface 61b, 61c : Recess 62 : Lever 70 : Filter element 71 : Filter medium 72 : Inner cylinder 72a : Holes 73, 74: Plates 81, 82, 83, 84, 85 : Seal member 100 : Filter device 110 : Case 120 : Upper lid 140 : Connector 141 : Cylindrical portion 142 : Tubular portion 145 : Plain washer 151 : Bolt

Claims (7)

a cylindrical case with a bottom;
a head covering the opening of the case, the head having a channel hole serving as a liquid channel;
a connecting member provided on the head;
a fastening member for fixing the connecting member to the head;
with
The fastening member has a head, a cylindrical portion thinner than the head, and a first external thread provided on the outer peripheral surface of the cylindrical portion,
The head has a first female threaded portion with which the first male threaded portion is screwed,
The connecting member has a tubular portion with one end surface abutting against the head and the other end surface abutting against the head,
The cylindrical portion is inserted into the hollow portion of the cylindrical portion,
An annular first sealing member is provided between the tubular portion and the head,
A filter device, wherein an annular second sealing member is provided between the tubular portion and the columnar portion. A first hole communicating with the channel hole is provided inside the cylindrical portion,
A groove communicating with the first hole is provided in at least one of the inner peripheral surface of the cylindrical portion and the outer peripheral surface of the cylindrical portion in the portion where the cylindrical portion and the cylindrical portion overlap,
The filter device according to claim 1, wherein the second seal member is provided between the groove and the head. The cylindrical portion is provided with a first coupling portion,
The head is provided with a second coupling portion having a shape corresponding to the first coupling portion,
The filter device according to claim 1 or 2, wherein the first coupling portion and the second coupling portion are coupled. The first coupling portion is at least one first concave portion provided on the outer peripheral surface of the tubular portion,
The second coupling portion is a first protrusion provided on the head,
The filter device according to claim 3, wherein the first coupling portion and the second coupling portion are coupled by inserting the first protrusion into the first recess. The head is provided with a second hole into which the tubular portion is inserted,
The first coupling portion is a first plane provided on the outer peripheral surface of the tubular portion,
The second coupling portion is a second plane that abuts on the first plane,
4. The filter device of claim 3, wherein said second hole has said second plane. A rotating member rotatably provided on the head,
The head includes a cylindrical third hole, a cylindrical protrusion provided on the bottom surface of the third hole and having a smaller diameter than the inner diameter of the third hole, the third hole and the flow path hole. and a connecting hole that connects the
The connecting hole is provided inside the convex portion, one end of which is open to the tip surface of the convex portion,
The rotating member is inserted into the third hole and has a columnar insertion portion whose outer diameter is substantially the same as the inner diameter of the third hole,
A concave portion is provided on the bottom surface of the insertion portion,
the insertion portion is rotatable between a state in which the bottom surface of the insertion portion abuts the tip of the protrusion and a state in which the recess overlaps the protrusion;
An annular third sealing member is provided on the outer peripheral surface of the convex portion,
The filter device according to any one of claims 1 to 5, wherein the height of the third seal member is equal to or greater than the height of the convex portion. A cylindrical nut abutting on the outer peripheral surface of the case,
A second female thread is provided on the inner peripheral surface of the nut,
The head is provided with a second male threaded portion that is screwed with the second female threaded portion,
The case is provided with a second projection near the opening end,
The filter device according to any one of claims 1 to 6, wherein the head is provided with a second recess into which the second projection is inserted.

Images