JP5902403B2 - Injector holding structure for fuel delivery pipe - Google Patents

Description

  The present invention relates to a fuel delivery pipe used for supplying fuel to an electronically controlled fuel injection engine, and more particularly to a structure for holding an injector with respect to a fuel delivery pipe in which a socket for connecting an injector is integrally formed by deep drawing on a bottom surface of a lower case. About.

As an injector holding structure for this type of fuel delivery pipe, for example, there is a technique disclosed in Patent Document 1. This prior art distribution conduit (fuel delivery pipe) has a flat box-like lower part formed with an elongated box-like upper member (upper case) whose one side is open and a plurality of cylindrical insertion parts (socket parts). consists member (lower case), the upper member and lower member are integrally bonded by brazing Kesuru by bonding a flange formed on each outer circumference. The holding portion of the elastic clamp device for clamping and holding the fuel injection valve (injector) inserted into each insertion portion is formed by a U-shaped web, and is struck so as to protrude to the fuel injection valve side on both U-shaped legs. A pair of projecting pieces that have been removed and a holding hole made of a pair of arcuate portions that can be elastically engaged with an annular groove formed in the fuel injection valve are provided. After inserting the fuel injection valve into the insertion portion of the distribution conduit, slide the elastic clamping device from one end of the distribution conduit to the position of the insertion portion so that each flange of the distribution conduit is located between the protruding piece and the web. The arc-shaped portion of the holding hole is elastically engaged with the annular groove of the fuel injection valve, and the fuel injection valve is held in the distribution conduit.

Japanese Examined Patent Publication No. 1-59429 (page 2, column 4, line 18 to page 3, column 6, line 15, FIG. 1 to FIG. 3).

  In the above prior art, it is necessary to slide each elastic clamp device from one end side of the distribution conduit to the position of the insertion portion in order to hold each fuel injection valve, and the movement distance becomes long, so it takes time to hold the fuel injection valve. In addition, when the elastic clamp device of the fuel injection valve near the center of the distribution conduit is replaced, there is a problem that the fuel injection valve positioned outside the fuel injection valve and the elastic clamp device must also be removed. The object of the present invention is to solve each of these problems.

Holding structure of the injector to fuel delivery pipe according to the invention of claim 1 is opened upward at one side in the longitudinal direction in an elongated box-shaped connecting the injector through the respective sealing rings on the bottom facing the one side surface thereof a lower case having a plurality of cylindrical socket portion being, the upper case which is opened at one side in the longitudinal direction in an elongated box shape, coupled in a liquid-tight all around each of the open edge a holding structure for the injector to fuel delivery pipe comprising Te, a central portion which is curved in one plane, made of mounting legs of the pair rising from both ends of the central portion, each distal end portion of the mounting leg portion wherein said central portion in a state fixed to the bottom surface of the lower case along the longitudinal direction as viewed from the bottom side parallel to the bottom surface of the lower case at least half of each socket portion A plurality of holders, and the legs of a thin metal plate than the width of the gap, a pair arranged in parallel with each other at a predetermined distance gap of a predetermined width between the bottom surface of the lower case is formed surrounds parts and with crop in a U-shape consisting of connecting portion for connecting the one end, provided with a plurality of clips formed respectively holding recess near the distal end portion of Uchihen that face each other of the legs, annular base side after the supply-side connection tubular part of the injector holding grooves are formed and inserted into the socket portion of the lower case, and inserts the tip of the legs of the clip in the gap between the bottom surface of the central portion and the lower case of the holder said injector engaged with the annular retaining groove of the supply-side coupling tubular portion of elastically engaged to the bottom surface of the respective retaining recess an annular retaining groove of the respective tip open against the elasticity of the clip Te the in-by Is characterized in that stop holding omission in the fuel delivery pipe the Ekuta.

In the holding structure of the injector to fuel delivery pipe according to the preceding paragraph, the clip is preferably bent corresponding angle along a straight line parallel to the connecting portion at the root portion of the legs.

In the injector holding structure for the fuel delivery pipe described in the preceding two paragraphs, the holder is a sheet metal member so that its central portion is parallel to the bottom surface of the lower case in the mounted state, and the mounting legs are radiused from both ends of the central portion. Extends outward in the direction and bends into a step shape, with each tip abutting and fixed to the bottom surface of the lower case, and attached to the inner edge of the central portion surrounding the socket portion on the bottom surface side of the lower case. It is preferable to bend and form the facing flange portion, and to form a gap into which both the leg portions of the clip are inserted between the leading edge of the flange portion and the bottom surface of the lower case.

In the holding structure of the injector to fuel delivery pipe according to claim 1 or claim 2, wherein the holder is made of sheet metal member, the mounting member to be parallel to the bottom surface of the lower casing at a central portion thereof attached state The central portion and the lower case that extend radially outward from both ends of the central portion and bend in a step shape and abut each tip end against the bottom surface of the lower case, and surround the socket portion. It is preferable to form a gap into which both the leg portions of the clip are inserted .

In the holding structure of the injector to fuel delivery pipe according to claim 1 or claim 2, the central portion of the holder is made of circular section metal rods or tubing which is parallel to the bottom surface of the lower case in the mounted state and things, the mounting leg extensions at both ends of the central portion is bent to the bottom side of the lower case fixed to the tip portion in contact with the bottom surface of the lower case, and the bottom surface of the lower case and the central portion It is preferable to form a gap between which both the leg portions of the clip are inserted .

According to the present invention, a central portion which is curved in one plane, made of mounting legs of the pair rising from both ends of the central portion, each distal end portion of the mounting legs on the bottom of the lower case It is attached to the fuel delivery pipe by adhering along the longitudinal direction, and in this attached state, the central portion is parallel to the bottom surface of the lower case and surrounds at least half the circumference of each socket portion when viewed from the bottom surface side, and the bottom surface of the lower case. a plurality of holders gap of a predetermined width is formed between, and a thin metal plate than the width of the gap, connecting the legs and one end of a pair are arranged parallel to each other at a predetermined distance Inject with a plurality of clips, each of which has a U-shaped cut-out made of a connecting portion, and a plurality of clips each having a holding recess formed near the tip of the inner sides of both legs facing each other, and an annular holding groove formed on the base side The supply-side connection tubular part after insertion into the socket portion of the lower case, by inserting the legs of the clip in the gap between the bottom surface of the central portion and the lower case of the holder, supplies the distal portion of the legs Insert the fuel into the annular holding groove of the side connecting cylinder, open the tips of both legs against the elasticity of the clip, and elastically engage each holding recess with the bottom of the annular holding groove to fuel the injector has retaining held to the delivery pipe, since the clip is moved in a direction away from the bottom surface of contact with the fuel delivery pipe in a central portion of the holder is prevented, the supply-side connection tubular part of the injector in the fuel delivery pipe It can be kept inseparable. As a result, even if the fuel delivery pipe and its mounting structure are deformed due to a vehicle collision, or if an abnormally high fuel pressure is applied to the fuel delivery pipe for some reason, the injector will not come off the fuel delivery pipe. Leakage can be prevented.

Also, according to the invention of 請 Motomeko 1, since the central portion of the holder which is curved in one plane surrounds at least half of the socket portion when viewed from the bottom side parallel to the bottom surface of the lower case, Each leg portion of the clip that contacts the center portion and prevents movement away from the bottom surface of the fuel delivery pipe is also stably maintained in parallel without being inclined with respect to the bottom surface of the lower case. Since the said legs of the clip so will not be inclined with respect to the injector, it can be held irremovably to ensure the fuel delivery pipe and the injector.

Also, according to the invention of claim 1, the supply-side coupling tubular portion of the inserted injector socket portion of the lower case of the fuel delivery pipe is inserted into the gap between the bottom surface of the central portion and the lower case of the holder is the undetachable holding clips each holding recess of the legs only elastically engage the bottom surface of the annular retaining groove, the detachable from the socket unit just pulling the clip from the gap. In addition, each injector clip can be inserted and withdrawn independently of the other injectors. Therefore, it is possible to easily and easily hold and detach the required injector from the fuel delivery pipe.

When the clip is bent at a substantial angle along a straight line parallel to the connecting portion at the base portion of both legs, the connecting portion bent at a corresponding angle with respect to each leg portion is a knob for inserting and extracting the clip. Therefore, it becomes easy to insert and pull out the clip.

The holder is made of sheet metal members, bent stepwise with its central portion extending radially outwardly from the opposite ends of the central portion of the mounting legs to be parallel to the bottom surface of the lower case in the mounted state molding the respective tip in contact with the bottom surface of the lower case are fixed, formed by bending the flange portion toward the bottom surface side of the lower case in the state INSTALLATION to the inner edge of the central portion surrounding the socket portion, the flange portion In the case where a gap is formed between the tip edge and the bottom surface of the lower case so that both the leg portions of the clip are inserted , the strength of the center portion of the holder is improved, so the holding strength of the injector with respect to the fuel delivery pipe Will also improve. Also, since the flange portion and inevitably considerably large curved in the bent portion between the central portion of the seal ring made of flexible elastic body is close to the supply-side connection tubular part of the injector is provided, such as rubber is formed, possibility that the seal ring is damaged on contact upon insertion leaving the supply-side connection tubular part of the injector in the socket portion rather than, it is possible to eliminate the risk of fuel leakage.

The holder is made of sheet metal member, folding the molded stepped with its central portion extending radially outwardly from the opposite ends of the central portion of the mounting legs to be parallel to the bottom surface of the lower case in the mounted state Then, when the gap between which the two leg portions of the clip are inserted is formed between the center portion and the bottom surface of the lower case, the respective tip portions are brought into contact with and fixed to the bottom surface of the lower case. The manufacturing cost can be reduced by reducing the weight and simplifying. Incidentally, the burrs during processing the inner edge of the socket side of the central portion remains, causing the fuel leakage caused the seal ring contacts damaged when inserting leaving the supply-side connection tubular part of the injector in the socket part However, this can be prevented by giving a sufficient curved surface to the inner edge of the central portion.

Central portion of the holder is assumed consisting of circular section metal rod or tubing which is parallel to the bottom surface of the lower case in the state INSTALLATION, attachment leg bottom surface of the lower case an extension of the opposite ends of the central portion When the gap between the leg portions of the clip is inserted between the center portion and the bottom surface of the lower case , the holder is The weight can be reduced and the manufacturing cost can be reduced, and the outer circumference of the holder is all smooth and has no corners. Therefore, the seal ring comes into contact with the insertion side connecting cylinder part of the injector when it is inserted into and removed from the socket part. However, there is no risk of damage, and the risk of fuel leakage can be reduced.

It is a front view which shows the whole structure of 1st Embodiment of the holding structure of the injector with respect to the fuel delivery pipe by this invention. It is a bottom view of FIG. FIG. 2 is an enlarged left side view of FIG. 1. FIG. 4 is an enlarged cross-sectional view taken along line 4-4 of FIG. It is a right view of FIG. 4 which abbreviate | omits the lower half part of an injector and shows. FIG. 6 is a bottom view of FIG. 5 showing the injector cut by an annular holding groove and the clip cut by a connecting portion. It is a front view which shows the holder of 1st Embodiment of this invention. FIG. 8 is a bottom view of FIG. 7. It is a top view which shows the clip of 1st Embodiment of this invention. FIG. 10 is a front view of FIG. 9. FIG. 6 is a cross-sectional view corresponding to FIG. 4 of the second embodiment of the injector holding structure for the fuel delivery pipe according to the present invention. It is a right view of FIG. 11 which abbreviate | omits the lower half part of an injector and shows it. FIG. 13 is a bottom view of FIG. 12 showing the injector cut by an annular holding groove and the clip cut by a connecting portion. FIG. 6 is a cross-sectional view corresponding to FIG. 4 of the third embodiment of the injector holding structure for the fuel delivery pipe according to the present invention. It is a right view which abbreviate | omitted a part of FIG. FIG. 16 is a bottom view of FIG. 15 showing only the injector cut by an annular holding groove. It is a bottom view which shows the holder of 3rd Embodiment of this invention. It is a right view of FIG.

  First, a first embodiment of an injector holding structure for a fuel delivery pipe according to the present invention will be described with reference to FIGS. The fuel delivery pipe 10 according to the first embodiment includes a lower case 11 in which three socket portions 12 for connecting an injector 40 are formed on a bottom surface 11a, and an upper case 15 that is liquid-tightly joined and fixed thereto. It is. Three holders 20 are fixed to the bottom surface 11 a of the fuel delivery pipe 10, and three clips 30 are provided to prevent the injectors 40 from being detached in cooperation with the holders 20.

As shown in FIG. 4, the injector 40 retained and retained by this embodiment has a cylindrical shape in which supply side and injection side connecting cylindrical portions 42 and 43 that protrude coaxially and outwardly at both ends are integrally provided. Body portions 41, annular grooves 42 a and 43 a are formed on the distal end sides of the connecting cylinder portions 42 and 43, and an annular holding groove 44 is formed on the base side of the supply-side connecting cylinder portion 42. . The body portion 41 incorporates an electromagnetic valve mechanism that is opened and closed by a control input given from a control unit (not shown) via a connector 45. The supply side connecting cylinder part 42 is liquid-tightly connected via an O-ring 46 inserted into the socket part 12 of the fuel delivery pipe 10, and the injection side connecting cylinder part 43 is formed in the cylinder head of the engine where fuel is injected. It is inserted into the hole and connected in a liquid-tight manner via an O-ring 47.

As shown mainly in FIGS. 1, 2, and 4, the lower case 11 has an elongated box shape, and one side surface along the longitudinal direction is opened to connect the injector 40 to the bottom surface 11 a facing the side surface. This is a sheet metal member by deep drawing, in which a plurality of cylindrical socket portions 12 are integrally provided. Each socket portion 12 is formed so as to enter the fuel delivery pipe 10 at a predetermined interval, and a communication hole 12a is provided at the top thereof. The upper case 15 is also a long and thin sheet metal member formed by deep drawing and opened at one side surface along the longitudinal direction, and one end portion on the left side in FIG. 1 has a large depth. The lower case 11 and the upper case 15 are fitted so that the outer peripheral surface of the former open edge portion overlaps the inner peripheral surface of the latter open edge portion, and are joined together in a liquid-tight manner by brazing.

  A connecting pipe 16 for connecting a fuel supply pipe (not shown) connecting the fuel delivery pipe 10 and the fuel pump is fixed to the end face on the side where the depth of the upper case 15 is increased, by liquid brazing. Two annular ridges 16a are formed in the middle portion of the connecting pipe 16 in the longitudinal direction so as to prevent and hold the fuel supply pipe. In addition, two brackets 18 each having a mounting hole 18a are fixed to each socket portion 12 on the bottom surface 11a of the lower case 11 by brazing or resistance welding. The fuel delivery pipe 10 is attached to the cylinder head of the engine via the bracket 18.

As shown mainly in FIGS. 7 and 8, the holder 20 of the first embodiment is a sheet metal member, and is curved in a substantially U shape (a shape obtained by extending both ends of a semicircular arc in parallel with each other by a certain distance) on one plane. And a pair of fixed-width mounting legs 22 that extend in opposite directions from both ends of the central portion 21 and rise in steps. The distal end portion 22a of the mounting leg portion 22 is a flat line with each other, the inner edge of the Hisashi Naka portion 21 a flange portion 21a extending in the same direction as the rising direction of the mounting leg portion 22 is formed. The outer edge of the Hisashi Naka portion 21, the central perpendicular to the both tip 22a, the projection 21b of predetermined width that protrudes in the radial direction is formed. This protrusion 21b is also bent in a step shape like the tip 22a, and its height is smaller than that of the tip 22a.

As shown in FIGS. 4 to 6, the holder 20 has both end portions 22 a oriented along the longitudinal direction of the bottom surface 11 a of the lower case 11, and the center of the arc portion of the central portion 21 is the central axis of the socket portion 12. Are positioned so as to coincide with each other, and both end portions 22a are brought into contact with the bottom surface 11a of the lower case 11 and fixed to the lower case 11 by brazing or resistance welding. In this fixed state, the central portion 21 of the holder 20 is parallel to the bottom surface 11a of the lower case 11, so that surround at least half of watching from the bottom 11a of the this the socket portion 12. The height of the flange portion 21a is set so that a gap a having a constant width (a value larger than the plate thickness of the clip 30 described below) is formed between the front end edge and the bottom surface 11a of the lower case 11. Contact name bracket 18 and the holder 20, in the case of resistance welding and welding before brazing of the lower case 11 and upper case 15, in the case of brazing simultaneously with brazing of the lower case 11 and upper case 15 It is good.

  As shown mainly in FIGS. 9 and 10, the clip 30 is a connection that connects a pair of leg portions 31 arranged in parallel to each other at a predetermined distance from a metal plate thinner than the width of the gap a and one end side thereof. A material cut out in a U-shape formed of the portion 32 is bent at 90 degrees along a straight line parallel to the connecting portion 32 at the base portion of both leg portions 31. The cuts 32b formed on the side of the leg portion 31 of the intermediate portion 32a of the connecting portion 32 are continuous with the inner sides of the both leg portions 31 facing each other. The intermediate portion 32a of the connecting portion 32 corresponding to the notch 32b is a simple flat plate, and the distal end portion of the leg portion 31 can be opened and closed by elastically bending and deforming the intermediate portion 32a. Arc-shaped holding recesses 31a are formed near the tips of the inner sides of the legs 31 opposite to each other, and the radius of the holding recesses 31a is substantially the same as the radius of the bottom surface of the annular holding groove 44 of the injector 40 described above. Although the same, in a free state where no external force is applied, the distance between the central portions of the holding recesses 31a is smaller than the diameter of the bottom surface of the annular holding groove 44 of the injector 40. Each member 10,15,16,18,20,30 consists of a steel plate, and is nickel-plated beforehand for rust prevention.

  As shown in FIGS. 4 to 6, after each injector 40 is inserted into the socket portion 12 of the lower case 11 with the supply side connecting cylinder portion 42, the clip 30 is connected to the fuel as shown by a two-dot chain line 30A. Both leg portions 31 are inserted into the gap a between the central portion 21 of the holder 20 and the bottom surface 11a of the lower case 11 so as to face away from the delivery pipe 10. If the front end portions of both leg portions 31 abut on the annular holding groove 44 of the supply side connecting cylinder portion 42, they are opened against the elasticity of the intermediate portion 32 a of the connecting portion 32 of the clip 30, and each holding recess 31 a is opened by the injector 40. When the position of the annular holding groove 44 is reached, it is restored by the elasticity of the intermediate portion 32a, and each holding recess 31a is elastically engaged with the bottom surface of the annular holding groove 44 and stopped. In this state, the protrusion 21b of the holder 20 is inserted into the notch 32b of the clip 30, thereby preventing the clip 30 from rotating. If the injector 40 is moved in the pulling direction, the clip 30 engaged with the annular holding groove 44 is also moved, and if both the leg portions 31 of the clip 30 come into contact with the leading edge of the flange portion 21a of the central portion 21 of the holder 20. Since the further movement of the clip 30 is prevented, the supply side connecting cylinder portion 42 of the injector 40 is held in the fuel delivery pipe 10 so as not to be detached.

  According to the first embodiment, the leg portion 31 of the clip 30 is formed in the annular holding groove 44 of the injector 40 in which the supply side connecting cylinder portion 42 is inserted into the socket portion 12 of the lower case 11 of the fuel delivery pipe 10 as described above. Since the holding recess 31a is elastically engaged and the clip 30 is in contact with the center portion 21 of the holder 20 and is prevented from moving away from the bottom surface 11a of the fuel delivery pipe 10, the supply side connecting cylinder of the injector 40 is prevented. The portion 42 is held by the fuel delivery pipe 10 so as not to be detached. Thus, even when the fuel delivery pipe 10 and its mounting structure are deformed due to a vehicle collision or the like, or when an abnormally high fuel pressure is applied to the fuel delivery pipe 10 for some reason, the injector 40 is disconnected from the fuel delivery pipe 10. Since there is no fuel leakage can be prevented.

Oite the first embodiment described above, the central portion 21 of the holder 20 is bent in a substantially U shape on the bottom surface 11a parallel to a plane of the fuel delivery pipe 10, surrounding at least a half of the socket portion 12 Therefore, each leg portion 31 of the clip 30 that is in contact with the leading edge of the flange portion 21 a of the central portion 21 and is prevented from moving away from the bottom surface 11 a of the fuel delivery pipe 10 is parallel to the bottom surface 11 a of the lower case 11. It is reliably maintained and there is no risk of tilting with respect to the bottom surface 11a. Therefore, the injector 40 is securely held by the fuel delivery pipe 10.

Also, Oite the first embodiment described above, the supply-side coupling tubular portion 42 of the injector 40 which is inserted into the socket portion 12 of the lower case 11 of the fuel delivery pipe 10 has a central portion 21 and the lower case of the holder 20 11, the holding recesses 31 a at the tips of the legs 31 of the clip 30 inserted from the gap a between the bottom surfaces 11 a of the eleven are simply held elastically engaged with the bottom surface of the annular holding groove 44. The supply side connecting cylinder portion 42 of the injector 40 can be detached from the socket portion 12 simply by pulling out the clip 30 from the gap a. Further, the clip 30 of each injector 40 can be inserted and withdrawn independently of the other injectors 40. Therefore, it is possible to easily and easily hold and detach the required injector 40 from the fuel delivery pipe 10.

Furthermore, in the first embodiment described above, the flange portion 21a toward the bottom surface 11a side of the lower case 11 is formed by bending at the inner edge of the central portion 21 of the holder 20 made of a sheet metal member , and the leading edge and the lower portion of the flange portion 21a are formed. A gap a is formed between the case 11 and the bottom surface 11a. By doing so, the central portion 21 of the holder 20 is reinforced by the flange portion 21a and the strength is improved, so that the injector 40 for the fuel delivery pipe 10 is improved. The holding strength is also improved.

Also, inevitably curved form in the bent portion between the flange portion 21a and a central portion 21 which the seal ring 46 made of a flexible elastic material such as rubber is close to the supply-side coupling tubular portion 42 of the injector 40 provided since the reduction of the risk of fuel leakage due to the supply-side coupling tubular portion 42 of the injector 40 a possibility that the seal ring 46 is damaged on contact upon insertion leaving the socket 12 rather than damage sheet Ruringu 46 Can be made. Contact name bending angle of the flange portion 21a for Chuo portion 21 is preferably set to more than 90 degrees, the tip of the flange portion 21a if so may be reduced to damage it in contact with the seal ring 46 .

Further, in the first embodiment described above mentioned, the connecting clip 30 which is bent 90 degrees along a straight line parallel to the connecting portion 32 at the root portion of the leg portions 31, bent 90 degrees with respect to both legs 31 Since the portion 32 can be used as a knob when the clip 30 is inserted and pulled out, the clip 30 can be easily inserted and pulled out. However, carrying out the present invention, it is also possible to implement a flat without bending the clip 30. In this case, the elastic opening and closing of the front end portion of the leg portions 31 is not only bent in the intermediate portion 32a of the connecting portion 32, each portion is performed by complexly twisted elastically deformed.

Further, in the injector 40 provided with the connector 45 projecting sideways as used in the first embodiment, the projecting direction of the connector 45 needs to be a predetermined angle with respect to the longitudinal direction of the fuel delivery pipe 10, and this When the angle is greatly deviated, there is a problem that the wire harness cannot be connected to the connector 45 after the fuel delivery pipe 10 into which each connector 45 is inserted is attached to the cylinder head. However, in the first embodiment of this, the central portion 21 of the holder 20 is secured to the bottom surface 11a of the lower case 11 so as to surround at least half of the socket portion 12, holder injector 40 Connector 45 Unless the angle position coincides with the open side of the 20 U-shaped central portion 21, the socket portion 12 cannot be completely inserted. Thereby to prevent erroneous installation of inserting the socket portion 12 of the fuel delivery pipe 10 at the wrong angle injector 40, after the respective connectors 45 and the fuel delivery pipe 10 attached to the cylinder head, a connector wire harness The problem of being unable to connect to 45 is prevented.

  Next, the second embodiment shown in FIGS. 11 to 13 will be described. In the second embodiment, only the holder 20A is different from the holder 20 of the first embodiment, and the other configuration is the same as that of the first embodiment. .

As shown in FIGS. 11 to 13, the center portion 25 of the holder 20A of the second embodiment removes the flange portion 21a from the center portion 21 of the holder 20 shown in FIG. Only the height of the step portion between the central portion 25 and the mounting leg portion 26 is lowered. Therefore, in a state where the mounting leg portion 26 of the holder 20A is fixed to the bottom surface 11a of the lower case 11, the gap between the bottom surface 11a and the central portion 25 of the lower case 11 becomes the clearance a as shown in FIG .

Also in the second embodiment, after inserting the supply-side connecting cylinder portion 42 of each injector 40 into the socket portion 12 of the lower case 11, both leg portions 31 of the clip 30 substantially the same as the first embodiment are attached to the holder 20A. By inserting into the gap a between the central portion 25 and the bottom surface 11a of the lower case 11, the supply side connecting cylinder portion 42 of the injector 40 is securely held in the fuel delivery pipe 10 so as not to be detached, as in the first embodiment. The

Therefore, even in the second embodiment, like the first embodiment, departing or when abnormally high fuel pressure is the applied if the fuel delivery pipe 10 of a vehicle collision, Lee Njekuta 40 from the fuel delivery pipe 10 is the fuel leakage is prevented since no hold to ensure the fuel delivery pipe 10 to the injector 40, Ki out to perform the retention and separation of the fuel delivery pipe 10 Lee Njekuta 40 simply and easily, folded 9 0 degrees was connecting portion 32 by utilizing the easy insertion and withdrawal of the clip 30, Ru prevents erroneous installation of inserting the socket portion 12 of the fuel delivery pipe 10 at the wrong angle b Njekuta 40. In this second embodiment, the burr during processing the inner edge of the socket portion 12 side of the central portion 25 remains, seal when inserting leaving the supply-side coupling tubular portion 42 of the injector 40 to the socket portion 12 The ring 46 may come into contact and cause damage, causing fuel leakage. However, this is prevented by applying a sufficient radiusing the inner edge of the central portion 25.

  Next, a third embodiment shown in FIGS. 14 to 18 will be described. In the third embodiment, the holder 20B is different from the holders 20 and 20A of the first and second embodiments, and the other configuration is the same as that of the first embodiment. Therefore, only the holder 20B will be described. Description of is omitted. In the third embodiment, the clip 30 is not provided with a detent.

As shown in FIGS. 14 to 18, unlike the first and second embodiments, the holder 20 </ b> B of the third embodiment is made of a metal bar having a circular cross section instead of a plate material. The holder 20B includes a central portion 28 that is curved in a U shape on a single plane, and a pair of mounting leg portions 29 bent outward from both ends of the central portion 28. It is bent in a step shape so as to rise from a plane including the center line of the central portion 28 with a relatively small bending radius from the middle of the bend, and its tip 29a is crushed so as to be parallel to the plane including the central line of the central portion 28. It is.

As shown in FIGS. 14 to 16, the holder 20 </ b> B has both tip portions 29 a equidistant from the center of the socket portion 12 in the direction along the longitudinal direction of the bottom surface 11 a of the lower case 11, and the center line of the socket portion 12. Passes through a plane formed inside the center line of the center portion 28 and is positioned so as to be orthogonal to the plane, and both the crushed tip portions 29a are brought into contact with the bottom surface 11a of the lower case 11 to be brazed or resisted. It is fixed to the lower case 11 by welding or the like. In this fixed state, the plane including the center line of the central portion 21 of the holder 20 is parallel to the bottom surface 11a of the lower case 11, and surrounds at least a half circumference of each socket portion 12 when viewed from the bottom surface 11a side. In addition, the stepped rising portion of each mounting leg portion 29 is set to a height such that the gap a having the predetermined width described above is formed between the central portion 28 and the bottom surface 11 a of the lower case 11.

Also in the third embodiment, after inserting the supply side connecting cylinder portion 42 of each injector 40 into the socket portion 12 of the lower case 11, both the leg portions 31 of the clip 30 substantially the same as the first embodiment are attached to the holder 20B. By inserting into the gap a between the center portion 28 and the bottom surface 11a of the lower case 11, the supply side connecting cylinder portion 42 of the injector 40 is held in the fuel delivery pipe 10 so as not to be detached, as in the first embodiment.

Therefore, in the third embodiment of this, similarly to the first embodiment, disengaged or when abnormally high fuel pressure is the applied if the fuel delivery pipe 10 of a vehicle collision, the injector 40 from the fuel delivery pipe 10 the fuel leakage can in prevention since no action of the clip 30 to be held irremovably injector 40 into the fuel delivery pipe 10 through each leg 31 also Ri do and be stable, the required injector 40 fuel delivery Ki out to perform the retention and release of the pipe 10 simply and easily, by utilizing a connecting portion 32 which is bent 90 degrees to facilitate insertion and withdrawal of the clip 30, the fuel delivery at an angle wrong injector 40 Ru can prevent erroneous assembling of inserting the socket portion 12 of the pipe 10. Further, since the Holder 20B of material may Magere circular section of the metallic rod can lower the production cost by simplifying the structure, yet the supply-side connection tubular part of the injector 40 since there is no corner on the outer periphery 42 no risk that the sealing ring is damaged on contact upon insertion leaving the socket portion 12, it is possible to reduce the possibility of fuel leakage due to damage of the sheet Ruringu 46.

The holder 20B may be made of a metal pipe having a circular cross section instead of a metal bar having a circular cross section . In the third embodiment of this, the tip portion 29a of the mounting legs 29 of the holder 20B has been assumed that bent 90 degrees outwardly from the opposite ends of the U-shaped central portion 28, bending the angle of 180 degrees May be made parallel to both ends of the U-shaped central portion 28, and the tip portion 29a may be crushed with a step so as to be parallel to a plane including the center line of the central portion 28.

DESCRIPTION OF SYMBOLS 10 ... Fuel delivery pipe, 11 ... Lower case, 11a ... Bottom surface, 12 ... Socket part, 15 ... Upper case, 20, 20A, 20B ... Holder, 21, 25, 28 ... Center part, 21a ... Flange part, 22, 26 29 ... Mounting leg, 22a, 26a, 29a ... Tip, 30 ... Clip, 31 ... Leg, 31a ... Holding recess, 32 ... Connecting part, 40 ... Injector, 42 ... Supply side connecting cylinder part, 44 ... Annular Holding groove, 46 ... seal ring, a ... gap.

Claims (5)

A plurality of cylindrical sockets are formed at predetermined intervals on the bottom surface facing the one side and connected to the injector via a seal ring on one side along the longitudinal direction. It was and the lower case, elongated in a box shape in one side in the longitudinal direction of an upper case which is opened downward, the injector for the respective opening edges fuel delivery pipe formed by combining in a liquid-tight all around the In the holding structure,
A state in which a center portion curved on one plane and a pair of mounting legs rising from both ends of the center portion are fixed to the bottom surface of the lower case along the longitudinal direction. a plurality of holders which the central portion Jo Tokoro gap is formed between at least the bottom surface of the lower case surrounds a half circumference of said viewed from the bottom side parallel to the bottom surface of the lower case each socket portion at ,as well as,
Wherein a remote thin metal plate by between gap, and a connecting portion connecting the legs with one end of a pair are arranged parallel to each other at a predetermined distance, facing each other of the legs comprising a plurality of clips at the distal end near the inner edge to form a retaining recess respectively, wherein the supply-side connection tubular part of the front Symbol injector in the inserted state in the socket portion of the lower case and the middle portion of the front serial holder lower The both leg portions of the clip inserted into the gap between the bottom surfaces of the case engage with an annular holding groove formed on the base side of the supply-side connecting cylinder portion of the injector at the holding recess, so that the injector is pulled out. holding structure of the injector to fuel delivery pipe characterized in that it is only stopped retained. Holding structure of the injector to fuel delivery pipe according to claim 1, characterized in that the legs of the clip are bent a predetermined angle along a straight line parallel with the connecting portion at its root portion. The holder is made of sheet metal members, each tip was bent formed into a stepped radially outwardly from opposite ends of its central portion the central portion of the mounting legs to be parallel to the bottom surface of the lower case in said secured in contact with the bottom surface of the lower case, the socket portion and the central portion inner edge to the between the edge of the flange portion bent formed on the bottom side I toward the front Symbol lower case Te lower case enclosing the holding structure of the injector to fuel delivery pipe according to claim 1 or claim 2 legs of the clip, characterized in that the gap to be inserted is formed between the bottom surface. The holder is made of sheet metal members, each of the central portion is formed bent in stepped radially outwardly from the opposite ends of the mounting legs is the central portion to be parallel to the bottom surface of the front Symbol lower case is fixed in contact with the distal end portion on the bottom surface of the lower case, claims, characterized in that a gap is formed which legs of the clip is inserted between the bottom of the lower case and the central portion An injector holding structure for a fuel delivery pipe according to claim 1 or 2. The central portion of the holder is made of pre-Symbol circular cross section of the metal rod which is parallel to the bottom surface of the lower case or tubing, the bottom side of the mounting leg end portions of the lower case extension of the central portion bent its tip is fixed in contact with the bottom surface of the lower case, the two leg portions of the clip, characterized in that the gap to be inserted is formed between the bottom surface of the lower case and the central portion An injector holding structure for a fuel delivery pipe according to claim 1 or 2 .

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