JP2011099425A - Fuel filter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel filter device which keeps an internal fuel passage in a normal condition even when a pipe member mounted in a housing is subjected to great impacts. <P>SOLUTION: A protruded portion 45 is formed on a delivery pipe 40 as the pipe member mounted in a mounting hole 133 of a cap 12 of the housing and a recessed portion 135 into which the protruded portion 45 can be fitted is formed in a cylindrical part 132 of the cap 12 to restrict the turn of the delivery pipe 40 around the axis of the mounting hole relative to the housing. An engaging body 50 engaged with the cylindrical part 132 has an annular plate part 51 which restricts the movement of the delivery pipe 40 in the direction of the axis of the mounting hole but does not restrict the turn of the delivery pipe 40 around the axis of the mounting hole when the delivery pipe 40 is subjected to impacts to give sacrificial damages to the protruded portion 45. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a fuel filter device that filters, for example, fuel supplied to an internal combustion engine of a vehicle.

  2. Description of the Related Art Conventionally, there is a fuel filter device in which a filter medium for filtering fuel is accommodated in a housing, and fuel is led out through a fuel passage inside a piping member attached to the housing. A support bracket for holding the housing is provided in such a fuel filter device, and the support bracket is mounted across the dash panel lower that easily deforms due to interference with the engine at the time of a vehicle collision and the air box that is difficult to receive engine interference. In the event of a vehicle collision, there is known a device that attempts to protect the housing that accommodates the filter medium of the fuel filter device by displacing the lower portion rearward without greatly changing the position of the head on which the piping member is mounted. (For example, refer to Patent Document 1 below.)

JP 2006-132362 A

  However, in the above-described prior art fuel filter device, the housing for accommodating the filter medium is easy to protect in the event of a vehicle collision or the like, but the piping member attached to the housing for distributing fuel in the housing does not move backward. When the piping member receives a large impact force, there is a problem that the fuel passage is deformed and the normal state cannot be maintained.

  The present invention has been made in view of the above points, and is a fuel capable of maintaining the internal fuel passage in a normal state even when a piping member mounted on the housing receives a large impact force. An object is to provide a filter device.

In order to achieve the above object, in the invention described in claim 1,
A housing for accommodating the filter medium inside,
A fuel filter device comprising: a pipe member mounted in a mounting hole provided in the housing and having a fuel passage communicating with the interior of the housing formed therein;
The piping member includes a mounting cylindrical portion that is mounted in the mounting hole of the housing and includes a first cylindrical portion that extends in the axial direction of the mounting hole, and a second tube that extends in a direction intersecting the first cylindrical portion. A cylindrical portion,
A convex portion is formed on one of the housing and the piping member, and a concave portion on which the convex portion is fitted is formed on the other to restrict rotation of the first cylindrical portion around the mounting hole axis with respect to the housing, and the first cylindrical portion When a rotational moment greater than or equal to a predetermined value is applied to the convex portion, the convex portion is damaged sacrificingly to release the restriction of rotation around the mounting hole axis of the first cylindrical portion,
The movement of the first cylindrical part mounted in the mounting hole of the housing in the mounting hole axial direction is restricted, and the first cylindrical part can be rotated around the mounting hole axis when the convex part is damaged. It is characterized by providing the regulating member provided in this way.

  According to this, when a large impact force is applied to the second tubular portion of the piping member, and when a rotational moment greater than a predetermined value is applied to the first tubular portion extending in the direction intersecting the second tubular portion, The convex portion formed on one of the housing and the piping member is damaged at a sacrifice, and the restriction on the rotation of the first cylindrical portion around the mounting hole axis is released. In addition to this, the restricting member restricts the movement of the first cylindrical part mounted in the mounting hole of the housing in the mounting hole axial direction, but the mounting hole of the first cylindrical part when the convex part is damaged. It is provided so as to be able to rotate around the axis. Therefore, when a large impact force is applied to the second cylindrical portion of the piping member, the convex portion is damaged at a sacrifice, the first cylindrical portion can be rotated around the mounting hole axis, and the regulating member is also This rotation is not restricted. In this manner, the internal fuel passage can be maintained in a normal state even when the piping member mounted on the housing receives a large impact force.

  The invention according to claim 2 is characterized in that a convex portion is formed on the piping member and a concave portion into which the convex portion is fitted is formed on the housing. According to this, since a convex part is formed in the piping member side, formation of a convex part is comparatively easy.

  In the invention according to claim 3, the axial direction of the mounting hole is the vertical direction, and the mounting cylindrical portion of the piping member is mounted in the mounting hole of the housing from above, and the first tubular portion of the piping member Is characterized in that a flange portion is formed above the mounting cylindrical portion, and the convex portion is formed below the flange portion. According to this, the convex part of the piping member and the concave part of the housing into which the convex part fits are located below the flange part formed in the first tubular part of the piping member. Therefore, it is easy to prevent water, foreign matter, and the like from entering between the convex portion and the concave portion from above.

  In the invention according to claim 4, the flange portion is provided on the lower side of the second tubular portion and separated from the second tubular portion, and the restricting member is engaged with the upper surface of the flange portion. This is characterized in that the movement of the first cylindrical portion in the mounting hole axial direction is restricted. According to this, the restricting member restricts the movement of the first cylindrical part mounted in the mounting hole of the housing in the mounting hole axial direction, and the mounting hole axis of the first cylindrical part when the convex part is damaged It is possible to easily form a configuration that enables rotation around.

It is a top view which shows schematic structure of the fuel filter apparatus 1 in one Embodiment to which this invention is applied. It is the II-II sectional view taken on the line of FIG. FIG. 6 is a top view of a principal part showing a mounting portion of the outlet pipe 40 to the cap 12. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. (A) is a top view of the anchoring body 50, (b) is a sectional view taken along line VIb-VIb in (a), and (c) is a sectional view taken along line VIc-VIc in (a). . 6 is a cross-sectional view for explaining a state when a large impact force is applied to the downstream side cylindrical portion 43 of the outlet pipe 40. FIG.

  Embodiments to which the present invention is applied will be described below with reference to the drawings.

  FIG. 1 is a top view showing a schematic configuration of a fuel filter device 1 to which the present invention is applied, and FIG. 2 is a sectional view taken along line II-II in FIG. However, in FIG. 2, in order to make the configuration easy to understand, only the outlet pipe 40 is shown not in the II-II section but in the section in the extending direction of the outlet pipe 40.

  A fuel filter device 1 shown in FIG. 1 is used in, for example, a common rail system that supplies fuel to a diesel engine that is an internal combustion engine. The fuel filter device 1 is mounted in an engine room of a vehicle and supplies fuel in a fuel tank to a high-pressure pump. It is interposed in the fuel supply path to remove moisture and foreign matter from the fuel.

  As shown in FIG. 1, the fuel filter device 1 includes a housing 10 that accommodates a filter medium and the like therein, an introduction pipe 30 that is provided on the upper surface of the housing 10 and introduces fuel into the housing 10, and the housing 10 A lead-out pipe 40 and the like are provided for deriving fuel from the fuel.

  As shown in FIG. 2, the housing 10 of the fuel filter device 1 has a cup-like (bottomed cylindrical) case 11 constituting an outer shell and a case 11 that is detachably attached to the upper opening end of the case 11. It is composed of a shallow cup-shaped cap 12. Each of the case 11 and the cap 12 is made of, for example, polyamide resin, and a screw portion formed on the inner peripheral side of the upper end portion of the case 11 and a screw portion formed on the outer peripheral side of the lower end portion of the cap 12 are screwed together. A cap 12 is attached to the case 11.

  The cap 12 is provided with a rubber O-ring 19 serving as a sealing member above the above-described screw portion. When the cap 12 is attached to the case 11, the cap 12 is interposed between the case 11 and the cap 12. It is designed to seal.

  A filter member 20 is accommodated in the housing 10. The filter member 20 includes a filter medium 24 made of nonwoven fabric, an outer cylinder 21 surrounding the outer periphery of the filter medium 24, an upper end plate 22 disposed over the entire area above the filter medium 24, and a central opening of the upper end plate 22. The center cylinder 23 extends upward. The outer cylinder 21, the upper end plate 22 and the central cylinder 23 are integrally formed of, for example, a resin material, and a flange portion 21 a that protrudes radially outward is formed at the lower end portion of the outer cylinder 21.

  On the inner surface of the case 11, ribs 11a are formed at a plurality of locations in the circumferential direction (only one location is shown in FIG. 2). The flange portion 21 a of the outer cylinder 21 is sandwiched between the upper end surface of the rib 11 a of the case 11 and the lower end surface of the cap 12, and the filter member 20 is accommodated in a predetermined position in the housing 10.

  As shown in FIG. 2, the filter member 20 is accommodated in a predetermined position in the housing 10, and an upper space 10 a and a lower space 10 b are formed above and below the filter medium 24 in the housing 10. The outer diameter of the outer cylinder 21 of the filter member 20 is slightly smaller than the inner diameter of the cap 12, and a part of the flange portion 21a of the outer cylinder 21 is missing in the circumferential direction, so that the upper space 10a and the lower space 10 b communicates with a passage formed between the outer cylinder 21 and the cap 12.

  The cap 12 is provided with a lead-out passage portion 131 that forms a fuel lead-out passage in the upper surface thereof. The lead-out passage portion 131 extends radially outward from the center portion of the cap 12 and is a cylindrical portion 132 that extends upward in the vicinity of the downstream end thereof. The above-described outlet pipe 40 is attached to the cap 12 with the inside of the cylindrical portion 132 as an attachment hole 133.

  For example, the outlet pipe 40 made of polyamide resin has a substantially L shape, and is connected to the upstream cylindrical portion 42 extending in the axial direction (vertical direction) of the mounting hole 133 and the downstream side of the upstream cylindrical portion 42 and mounted. It comprises a downstream cylindrical portion 43 extending in a direction orthogonal to the axis of the hole 133. The upstream side portion (lower portion) of the upstream side cylindrical portion 42 is a mounting cylindrical portion 41 that is mounted in the mounting hole 133 of the cap 12. Further, the downstream side portion (left side portion in the drawing) of the downstream side cylindrical portion 43 serves as a fuel hose mounting portion not shown.

  When the filter member 20 is accommodated at a predetermined position in the housing 10, as shown in FIG. 2, the inside of the central cylinder 23 of the filter member 20 communicates with the fuel lead-out passage in the lead-out passage portion 131, and further leads out. It communicates with the inside of the pipe 40.

  Although not shown in FIG. 2, as shown in FIG. 1, the upper surface portion of the cap 12 is also provided with an introduction passage portion 121 that forms a fuel introduction passage therein, and at the upstream end of the introduction passage portion 121. Is equipped with an introduction pipe 30. The introduction pipe 30 and the lead-out pipe 40 have substantially the same structure, and the mounting structure of the lead-in pipe 30 to the cap 12 is substantially the same as the mounting structure of the lead-out pipe 40 to the cap 12. Main part composition is explained using a part.

  FIG. 3 is a top view of an essential part showing a mounting portion of the outlet pipe 40 to the cap 12, and FIG. 4 is a sectional view taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view taken along line VV in FIG. However, in FIG. 5, illustration of the engaging member 50 described later is omitted.

  As shown in FIG. 4, the outlet pipe 40 has an upstream cylindrical portion 42 that extends in the axial direction of the mounting hole 133, and a downstream cylindrical portion 43 that extends in a direction orthogonal to the upstream cylindrical portion 42. The lower portion of the upstream cylindrical portion 42 is a mounting cylindrical portion 41 that is inserted into the cylindrical portion 132 of the cap 12 (that is, the mounting hole 133). A groove portion is formed on the outer peripheral surface of the mounting cylindrical portion 41, and a rubber O-ring 49 as a seal member is disposed in the groove portion. The inner peripheral surface of the cylindrical portion 132 and the outer periphery of the mounting cylindrical portion 41 are arranged. Seals between the surfaces.

  At an intermediate portion in the axial direction of the upstream cylindrical portion 42 that is above the mounting cylindrical portion 41, a flange portion 44 that protrudes radially outward is formed over the entire circumference. The outer diameter of the flange portion 44 is substantially equal to the outer diameter of the cylindrical portion 132. Therefore, the flange portion 44 covers the mounting opening end surface 134 of the cylindrical portion 132 (the surface on the upper side of the cylindrical portion 132 in the figure) over the entire area.

  A recessed portion 135 that is recessed in the axial direction of the cylindrical portion 132 is formed on the mounting opening end surface 134 of the cylindrical portion 132. On the other hand, the upstream cylindrical portion 42 of the outlet pipe 40 is formed with a convex portion 45 protruding outward from the mounting cylindrical portion 41 and protruding downward from the flange portion 44, and the convex portion 45 is formed in the cylindrical portion 132. Is fitted into the recess 135. As shown in FIG. 5, a plurality of (three in this example) recesses 135 are uniformly formed in the circumferential direction in the cylindrical portion 132, and the upstream cylindrical portion 42 is formed so as to correspond to the respective recesses 135. A plurality (three in this example) of convex portions 45 are formed.

  The plurality of convex portions 45 are set so as to be damaged when a predetermined or higher rotational moment is applied to the upstream cylindrical portion 42. The predetermined value of the rotational moment is larger than the rotational moment generated during normal maintenance or the like in which the fuel hose is attached to or detached from the downstream end of the outlet pipe 40, and is compared with the downstream cylindrical portion 43 due to a vehicle collision or the like. Is set to be smaller than the rotational moment generated by applying a large impact force.

  That is, the convex portion 45 is not damaged by the rotational moment generated in the upstream cylindrical portion 42 due to the stress urged by the downstream cylindrical portion 43 during normal use, and the downstream cylindrical portion 43 is urged when an abnormality such as a vehicle collision occurs. The convex portion 45 is damaged by the rotational moment generated in the upstream cylindrical portion 42 by the applied stress.

  As shown in FIG. 4, the outlet pipe 40 in which the mounting cylindrical portion 41 is inserted into the cylindrical portion 132 of the cap 12 is secured to the cylindrical portion 132 of the cap 12 by an engaging body 50.

  6A is a top view of the anchoring body 50, FIG. 6B is a cross-sectional view taken along the line VIb-VIb of FIG. 6A, and FIG. 6C is FIG. Is a sectional view taken along line VIc-VIc.

  As shown in FIG. 6 (a), the engaging member 50 has an annular ring plate portion 51. As shown in FIG. 6 (b), a plurality of locations on the outer periphery of the annular plate portion 51. Arm portions 52 (in this example, a pair of arm portions 52) extending downward from each other (two locations facing each other in this example) are provided.

  The arm portion 52 has a circular cross section along the outer peripheral surface of the cylindrical portion 132 of the cap 12, and each arm portion 52 has a rectangular engagement shape as shown in FIG. A stop hole 53 is formed. The locking hole 53 is a hole for locking to a locking claw 132a having a trapezoidal cross section protruding from the outer peripheral surface of the cylindrical portion 132 shown in FIG. As shown in FIG. 6B, an inclined surface 54 for smoothly guiding the locking claw 132 a into the locking hole 53 is formed below the locking hole 53 of the arm portion 52.

  As shown in FIG. 4, the downstream cylindrical portion 43 and the flange portion 44 of the outlet pipe 40 are separated from each other, and the annular plate portion 51 of the engaging member 50 is thinner than the interval. Therefore, the annular plate portion 51 of the engaging member 50 can be in contact with the upper surface of the flange portion 44 over the entire circumference.

  When the outlet pipe 40 is mounted in the mounting hole 133 of the cap 12, first, the downstream side cylindrical portion 43 of the outlet pipe 40 is downstream from the side where the arm portion 52 protrudes inside the annular plate portion 51 of the engaging body 50. The lead-out pipe 40 and the engaging body 50 are combined so that the lower surface of the annular plate portion 51 is in contact with the upper surface of the flange portion 44 over the entire circumference.

  Next, the mounting cylindrical portion 41 of the lead-out pipe 40 is fitted so that the convex portion 45 of the lead-out pipe 40 fits into the concave portion 135 of the cylindrical portion 132 while the combined state of the lead-out pipe 40 and the engaging body 50 is substantially maintained. Is inserted into the cylindrical portion 132 of the cap 12. Along with this, the engaging body 50 moves together with the outlet pipe 40 in the downward direction of FIG. 4, and the locking claw 132a presses the inclined surface 54 from the inside. As a result, the arm portion 52 of the engaging member 50 bends outward, and when the inclined surface 54 gets over the locking claw 132 a, the bending of the arm portion 52 is restored, and the locking claw 132 a is locked to the locking hole 53 of the arm portion 52. Locks to the lower end surface.

  When the locking between the locking hole 53 of the engaging body 50 and the locking claw 132a of the cylindrical portion 132 is completed, the annular plate portion 51 of the engaging body 50 comes into contact with the upper surface of the flange portion 44 of the outlet pipe 40, The mounting cylindrical portion 41 of the outlet pipe 40 is prevented from coming out from the cylindrical portion 132 to the outside. In other words, the annular plate portion 51 of the engaging member 50 restricts only the mounting cylindrical portion 41 of the outlet pipe 40 from moving upward in the axial direction of the mounting hole 133.

  In the fuel filter device 1 having the above-described configuration, the fuel introduced through the introduction pipe 30 flows through the fuel passage in the introduction passage portion 121, flows into the upper space 10a, and further communicates with the upper space 10a. Flow into. In the lower space 10b, moisture or the like aggregated from the fuel that has flowed in is settled and stored. The fuel that has flowed into the lower space 10b passes through the filter medium 24 of the filter member 20, and at that time, agglomeration of fine water droplets and removal of foreign substances are performed. The fuel that has passed through the filter medium 24 and from which moisture and foreign matter have been removed flows from the central cylinder 23 through the fuel passage in the outlet passage 131 and is led out through the outlet pipe 40.

  Here, each of the introduction pipe 30 and the outlet pipe 40 corresponds to a piping member in which a fuel passage communicating with the inside of the housing 10 is formed. The upstream cylindrical portion 42 of the outlet pipe 40 corresponds to a first cylindrical portion, and the downstream cylindrical portion 43 corresponds to a second cylindrical portion that extends in a direction orthogonal to the first cylindrical portion.

  Further, when the engaging body 50 restricts the movement of the upstream cylindrical portion 42 which is the first cylindrical portion mounted in the mounting hole 133 of the housing 10 in the mounting hole axial direction, and the convex portion 45 is damaged. This corresponds to a restricting member provided so as to be able to turn around the mounting hole axis of the upstream cylindrical portion 42 of the.

  Although not described in detail, the introduction pipe 30 also includes a downstream cylindrical portion 33 corresponding to the first cylindrical portion and an upstream cylindrical portion 32 corresponding to the second cylindrical portion. The engaging body 50 that prevents the introduction pipe 30 from coming off also restricts the movement of the downstream cylindrical portion 33 of the introduction pipe 30 attached to the attachment hole of the housing 10 in the attachment hole axial direction, and the convex portion is damaged. This corresponds to a restricting member provided so as to enable rotation of the downstream cylindrical portion 33 around the mounting hole axis. It can be said that the engaging member 50 is an axial movement prohibiting unit that prohibits the movement of the introduction pipe 30 and the outlet pipe 40 in the axial direction of the mounting hole.

  According to the fuel filter device 1 configured as described above, the outlet pipe 40 includes the mounting cylindrical portion 41 that is mounted in the mounting hole 133 of the cap 12 of the housing 10, and the upstream cylinder that extends in the axial direction of the mounting hole 133. Part 42 and a downstream cylindrical part 43 extending in a direction orthogonal to the upstream cylindrical part 42, a convex part 45 is formed on the upstream cylindrical part 42 of the outlet pipe 40, and the cylindrical part 132 of the cap 12. A concave portion 135 into which the convex portion 45 is fitted is formed. The combination of the convex portion 45 and the concave portion 135 restricts the rotation of the upstream cylindrical portion 42 of the outlet pipe 40 relative to the housing 10 around the mounting hole 133 axis.

  A large impact force is applied to the downstream cylindrical portion 43 of the outlet pipe 40 at the time of a vehicle collision or the like, and a rotational moment greater than a predetermined value is applied to the upstream cylindrical portion 42 extending in a direction orthogonal to the downstream cylindrical portion 43. In this case, the convex portion 45 formed on the outlet pipe 40 is sacrificially damaged, and the restriction on the rotation of the upstream cylindrical portion 42 around the axis of the mounting hole 133 is released.

  In addition to this, the engaging body 50 regulates the movement of the upstream cylindrical portion 42 attached to the attachment hole 133 of the cap 12 in the axial direction of the attachment hole 133, but the upstream side when the convex portion 45 is damaged. The rotation of the cylindrical portion 42 around the mounting hole 133 axis is not restricted.

  That is, when a large impact force is applied to the downstream side cylindrical portion 43 of the outlet pipe 40, the convex portion 45 is sacrificed and left in the concave portion 135 as illustrated in FIG. The upstream cylindrical portion 42 other than is rotated around the axis of the mounting hole 133, and the engaging member 50 does not restrict this rotation. Therefore, even when the lead-out pipe 40 attached to the housing 10 receives a large impact force, the convex portion 45 is damaged at a sacrifice, and the passage forming portion of the upstream cylindrical portion 42 is not easily damaged. The fuel passage can be maintained in a normal state.

  In addition, the lead pipe 40 is provided with a convex portion 45 projecting radially outward from the upstream cylindrical portion 42, and the cylindrical portion 132 of the cap 12 is provided with a concave portion 135 recessed in the axial direction from the mounting opening end surface 134. Formation of the part 45 and the recessed part 135 can be performed comparatively easily. Further, when the outlet pipe 40 receives a large impact force and the convex portion 45 is damaged, when the fuel filter device 1 needs to be restored, the outlet pipe 40 may be replaced, so that the restoration is relatively easy. .

  Further, the fuel filter device 1 is mounted on the vehicle in the posture shown in FIG. 2, and the mounting opening end face 134 of the cylindrical portion 132 is disposed above the mounting cylindrical portion 41 in the upstream cylindrical portion 42 of the outlet pipe 40. A flange portion 44 that covers the entire area is formed, and a convex portion 45 is formed below the flange portion 44. Accordingly, the convex portion 45 and the concave portion 135 are located below the flange portion 44, and water, foreign matter, and the like falling from above do not easily enter the fitting portion between the convex portion 45 and the concave portion 135.

  Further, the downstream cylindrical portion 43 and the flange portion 44 of the outlet pipe 40 are separated from each other, and the annular plate portion 51 of the engaging member 50 is thinner than the interval. Therefore, the annular plate portion 51 of the engaging member 50 can contact the upper surface of the flange portion 44 over the entire circumference. Thereby, the engaging body 50 restricts the movement of the upstream cylindrical portion 42 mounted in the mounting hole 133 of the cap 12 in the mounting hole axial direction, and the upstream cylindrical portion 42 when the convex portion 45 is damaged. The structure which enables rotation around the mounting hole axis line can be easily formed.

  Further, the fuel passage in the lead-out pipe 40 can be maintained in a normal state only by providing the convex part 45 in the lead-out pipe 40 and providing the concave part 135 in the cylindrical part 132 of the cap 12. Therefore, the fuel filter device 1 can be prevented from increasing in size for protecting the fuel passage.

  The effects of the lead-out pipe 40 and the lead-out pipe mounting portion to the housing 10 described above can be similarly obtained in the lead-in pipe 30 and the lead-in pipe mounting portion to the housing 10 adopting the same configuration.

  As described above, since the impact resistance of the fuel passages in the introduction pipe 30 and the outlet pipe 40 attached to the housing 10 of the fuel filter apparatus 1 can be improved, the fuel filter device 1 including the inlet pipe 30 and the outlet pipe 40 is provided. It is possible to eliminate a protector and the like that protects from an impact, so that the weight can be reduced and the vehicle mounting space can be suppressed.

  In addition, it is not necessary to use a vehicle mounting bracket having a complicated structure for the purpose of avoiding an impact on the fuel filter device 1, and even if a mounting bracket having a simple structure is employed, the inside of the introduction pipe 30 and the outlet pipe It is possible to ensure the impact resistance of the fuel passage in 40. As a result, the degree of freedom of mounting the fuel filter device 1 on the vehicle can be greatly improved.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In the above embodiment, the configuration in which the present invention is applied to the mounting portion of the introduction pipe 30 to the housing 10 and the mounting portion of the outlet pipe 40 is provided, but the configuration in which the present invention is applied to only one of them is provided. It doesn't matter.

  Moreover, in the said embodiment, although the upstream pipe part 42 and the downstream cylindrical part 43 orthogonally crossed the outlet pipe 40 which is a piping member, it should just be connected so that it may mutually cross | intersect. That is, the present invention can be applied if the piping member is not a straight line. The same applies to the introduction pipe 30. In the embodiment described below, not only the outlet pipe 40 but also the inlet pipe 30 can be implemented.

  In the above embodiment, the convex portion 45 is provided on the outlet pipe 40 side and the concave portion 135 is provided on the housing 10 side. However, the present invention is not limited to this, and the reverse may be possible. Further, the convex portion and the concave portion set on the lead-out pipe 40 side may be different between a part of the plurality of places where the convex portion and the concave portion are fitted and the remaining portion.

  In the above embodiment, the introduction pipe 30 and the outlet pipe 40 are provided on the upper surface side of the cap 12, but either one or both of the inlet pipe 30 and the outlet pipe 40 may be provided on the side surface side of the cap 12. It doesn't matter.

  In the above embodiment, the engaging member 50 including the annular plate portion 51 and the pair of arm portions 52 is used as the restricting member. However, the restricting member is used for the outlet pipe 40 attached to the attaching hole 133 of the housing 10. It is limited to this as long as it restricts the movement of the upstream cylindrical portion 42 in the mounting hole axis direction and enables the upstream cylindrical portion 42 to rotate around the mounting hole axis when the convex portion 45 is damaged. Not what you want. The regulating member is not limited to the one that is engaged with the housing 10, and may be integrated with the housing 10, for example. It may be provided so as to protrude from the upper surface of the cap 12 and be locked so as to press down the upper surface of the flange portion 44 of the outlet pipe 40.

  In the above embodiment, the mounting cylindrical portion 41 of the outlet pipe 40 is mounted in the mounting hole 133 in the cylindrical portion 132 of the cap 12, but the mounting cylindrical portion is at least the outer end of the mounting hole. For example, the mounting cylindrical portion may be mounted on the outer periphery of the cylindrical portion including the outer end portion (mounting opening end surface) of the mounting hole.

  Further, in the above embodiment, the convex portion 45 is formed on the upstream cylindrical portion 42 of the outlet pipe 40 and the concave portion 135 is formed on the cylindrical portion 132 of the cap 12 that forms the mounting hole 133. The formation part is not limited to the attachment part of the lead-out pipe 40 to the housing 10, and may be formed in another part. For example, the convex portion may be formed on the downstream cylindrical portion 43 of the outlet pipe 40.

  Moreover, in the said embodiment, although the derivation | leading-out pipe 40 was comprised by the upstream cylindrical part 42 and the downstream cylindrical part 43, if parts other than the mounting | wearing cylindrical part 41 are cylindrical, it will be limited to a cylindrical shape. It is not something.

  Moreover, in the said embodiment, although the housing 10 was comprised combining the case 11 and the cap 12, it is not limited to this, For example, you may comprise a housing combining 3 members or more. Absent.

  Moreover, in the said embodiment, although the fuel filter apparatus 1 was used for the common rail system which supplies a fuel to a diesel engine, it is not limited to this. For example, it may be employed in a fuel supply system for a diesel engine using a distribution pump, or may be employed in a fuel supply system for a gasoline engine.

1 Fuel Filter Device 10 Housing 11 Case (Part of Housing)
12 Cap (part of housing)
20 Filter member 24 Filter medium 30 Introduction pipe (pipe member)
32 Upstream cylindrical part (second cylindrical part)
33 Downstream cylindrical part (first cylindrical part)
40 Lead pipe (pipe member)
41 Installation cylindrical portion 42 Upstream cylindrical portion (first cylindrical portion)
43 Downstream cylindrical part (second cylindrical part)
44 Flange part 45 Convex part 50 Anchoring body (regulating member)
132 Cylindrical part 133 Mounting hole 134 Mounting opening end face 135 Recessed part

Claims (4)

A housing for accommodating the filter medium inside,
A fuel filter device comprising: a piping member mounted in a mounting hole provided in the housing and having a fuel passage communicating with the interior of the housing formed therein;
The piping member includes a first cylindrical portion that includes a mounting cylindrical portion that is mounted in the mounting hole and extends in an axial direction of the mounting hole, and extends in a direction that intersects the first cylindrical portion. A second tubular portion,
A convex portion is formed on one of the housing and the piping member, and a concave portion on which the convex portion is fitted is formed on the other to restrict the rotation of the first tubular portion around the mounting hole axis with respect to the housing. In the case where a rotational moment greater than a predetermined value is applied to the first cylindrical portion, the convex portion is damaged at a sacrifice, and the restriction of the rotation is released.
The movement of the first cylindrical portion mounted in the mounting hole in the mounting hole axial direction is restricted, and the first cylindrical portion is rotated around the mounting hole axis when the convex portion is damaged. A fuel filter device comprising a restricting member provided so as to enable the above.   The fuel filter device according to claim 1, wherein the convex portion is formed on the piping member, and the concave portion is formed on the housing. The axial direction of the mounting hole is the vertical direction, and the mounting cylindrical portion is mounted on the mounting hole from above,
The first cylindrical portion has a flange portion formed above the mounting cylindrical portion,
The fuel filter device according to claim 2, wherein the convex portion is formed on a lower side than the flange portion. The flange portion is provided on the lower side of the second cylindrical portion and separated from the second cylindrical portion,
4. The fuel filter device according to claim 3, wherein the restricting member is engaged with an upper surface of the flange portion to restrict movement of the first cylindrical portion in the mounting hole axial direction.

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