JP2017210920A - Automobile fluid channel pipe end opening device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automobile fluid channel pipe end opening device capable of reducing the number of components, saving its space by a simple structure and preventing influence caused by vibration and the like.SOLUTION: An automobile fluid channel pipe end opening device 10 of this invention comprises: a connection pipe 20 having one end part 21 connected to the automobile fluid channel pipe; a first half chamber 30 integrally formed at the other end part 23; a second half chamber 40 assembled to the first half chamber 30 to form a space inside of it; and engaging means for holding the first half chamber 30 and the second half chamber 40 under their assembled state. The other end part 23 of the connection pipe 20 is formed with an opening communicated with the space and at least one location of an assembled edge part E between the first half chamber 30 and the second half chamber 40 is provided with a releasing part that is formed while one edge part is displaced in position in respect to the other edge part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an automobile channel pipe end opening device for forming an opening at an end of an automobile channel pipe.

  For example, a flow path pipe communicating with the outside of the tank is connected to a fuel tank of an automobile via a canister. An open portion is formed at the end of the flow pipe, and outside air is taken into the fuel tank through the open portion, or fuel vapor in the fuel tank passes through the canister and is discharged to the outside of the tank. It has come to be.

  When the opening is formed at the end of the channel tube, foreign matter such as insects, dust, and dust may enter from the outside. In order to suppress such intrusion of foreign matter, for example, as shown in Patent Document 1 below, a filter cap having a plurality of lattices is attached to the end of a hose connector connected to one end of the hose, or the following Patent Document As shown in FIG. 2, a cover member provided with a plurality of ventilation slits is attached to the open end of the drain hose. Further, as indicated by the imaginary line in FIG. 8, the end portion side of the flow channel tube 100 may be bent in a substantially downward U shape so that the open portion S faces downward.

JP 2001-152979 A Japanese Patent Laying-Open No. 2015-90094

  However, in the inventions of Patent Document 1 and Patent Document 2, it is necessary to attach a separate member such as a filter cap or a cover member to the end of the hose connector or the open end of the drain hose, so the structure is complicated. There was a disadvantage that the number of parts was large.

  In addition, as shown in FIG. 8, when the open portion S at the end of the flow channel pipe is directed downward, the flow channel pipe is bent in a downward U shape. It will be arranged in parallel, increasing the installation space. Furthermore, when the flow path pipe is bent, the length of the pipe tends to be long, so that it is easily affected by the vibration of the vehicle.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an end opening device for an automobile channel pipe that can be simplified in structure by reducing the number of parts, can save space, and is less susceptible to automobile vibrations. Is to provide.

  In order to achieve the above object, the present invention is an end opening device for an automobile channel pipe that is connected to an end of an automobile channel pipe and forms an opening while preventing foreign matter intrusion, A connecting pipe having one end connected to an end of the automobile channel pipe, a first half chamber formed integrally with the other end of the connecting pipe, and the first half chamber A second half chamber that forms a space inside the first half chamber; and an engagement means that holds the first half chamber and the second half chamber in an assembled state. An opening communicating with the space is formed on the other end side, and at least one of the assembly edge portions of the first half chamber and the second half chamber has one edge portion on the other edge portion. Is provided with an opening formed by being displaced with respect to It is characterized in.

  In the end opening device for an automobile channel pipe according to the present invention, the other end of the connection pipe is connected to the first half chamber, and a part of the peripheral wall thereof is disposed in the first half chamber. In addition, it is preferable that a plurality of openings communicating with the space are provided in a peripheral wall disposed in the first half chamber of the connection pipe.

  In the end opening device for an automobile channel pipe according to the present invention, the connection pipe is arranged in parallel to the longitudinal direction of the first half chamber, and half of the cross section enters the first half chamber. Preferably, the first half chamber is connected to the first half chamber.

  In the end opening device for an automobile channel pipe according to the present invention, the first half chamber and the second half chamber are integrally formed through a thin hinge portion, and the thin hinge portion is bent. By doing so, the first half chamber and the second half chamber are assembled, and the assembled state is maintained by the engaging means, and the first half chamber and the second half half are maintained. In the assembly edge portion of the chamber opposite to the thin hinge portion, the distance from the thin hinge portion is displaced by setting one edge portion larger than the other edge portion, and the opening portion Is preferably provided.

  In the end opening device for an automobile channel pipe according to the present invention, the first half chamber has a guide wall inserted into an inner periphery of the second half chamber when the second half chamber is assembled. And the engaging means includes a frame-shaped or recessed engaging recess provided at an assembly edge of the first half chamber and the second half chamber. An engaging convex portion that engages with the concave portion from the inside, and between the guide wall and the engaging means at the assembly edge portion of the first half chamber and the second half chamber, either It is preferable that a fitting portion including a concave portion provided on one side and a convex portion provided on either side is provided.

  In the automotive channel pipe end opening device according to the present invention, the connection pipe includes one end connected to the automotive channel pipe and the other end formed integrally with the first half chamber. It is preferable that the clip for attaching to the vehicle body of a motor vehicle is integrally formed between these parts.

  According to the present invention, by connecting one end portion of the connecting pipe to the end portion of the automobile channel pipe, the fluid flowing through the automobile channel pipe enters the space through the connecting pipe, and the first half chamber and It can discharge | emit outside from the open part provided in the part which the assembly | attachment edge part with the 2nd half chamber shifted | deviated. In addition, when a negative pressure is generated on the automobile channel pipe side, an external fluid enters the space from the open portion and flows into the automobile channel pipe through the connection pipe.

  At this time, the external fluid flows through the space from the open portion formed by shifting one edge of the assembly edge of the first half chamber and the second half chamber with respect to the other edge. Since the inflow path is a bent path, foreign insects such as insects drifting outside, dust, and dust can be prevented from entering, and an external fluid can be allowed to flow in while preventing the intrusion of foreign objects.

  Since the first half chamber is integrally formed with the connecting pipe, the open portion can be formed by a simple operation of assembling the second half chamber to the first half chamber, and the number of parts can be reduced. And the structure can be simplified. In addition, since the open portion is formed by assembling the first and second half chambers and shifting the position of at least one of the assembled edge portions, the open portion faces downward without bending the connecting pipe. Or it becomes possible to make it difficult to enter a foreign material sideways. Furthermore, since it is not necessary to bend the connecting pipe, the end opening device can be made compact and space-saving can be achieved, and the length of the connecting pipe can be shortened to make it less susceptible to automobile vibrations. Can do.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an end opening device for an automobile channel pipe according to the present invention in a state where a first half chamber and a second half chamber are opened. It is a perspective view in the state where the 1st half chamber and the 2nd half chamber were closed in the end opening device. FIG. 6 is a plan view showing a state in which the first half chamber and the second half chamber are opened in the end opening device. In the same end part opening device, it is a front view in the state where the 1st half chamber and the 2nd half chamber opened. In the same end part opening device, it is the longitudinal section of the state where the 1st half chamber and the 2nd half chamber opened. In the same end part opening device, it is the longitudinal section of the state where the 1st half chamber and the 2nd half chamber were closed. In the same end part opening device, it is a transverse cross section of the state where the 1st half chamber and the 2nd half chamber were closed. It is explanatory drawing which shows the attachment state of the same edge part open | release apparatus. It is explanatory drawing which shows a 1st state at the time of closing a 1st half chamber and a 2nd half chamber in the same edge part open | release apparatus. It is explanatory drawing which shows a 2nd state at the time of closing a 1st half chamber and a 2nd half chamber in the same edge part open | release apparatus. The other embodiment of the edge part open | release apparatus of the flow-path pipe for motor vehicles concerning this invention is shown, and it is a top view of the state which the 1st half chamber and the 2nd half chamber opened. In the same end part opening device, it is a transverse cross section of the state where the 1st half chamber and the 2nd half chamber were closed.

  Hereinafter, with reference to FIGS. 1-10, one Embodiment of the edge part open | release apparatus of the flow-path pipe for motor vehicles based on this invention is described.

  As shown in FIG. 8, the end opening device 10 (hereinafter referred to as “end opening device 10”) of the automobile channel pipe is connected to the end of the automobile channel pipe 5 to prevent foreign matter from entering. The open portion S (see FIG. 6) is formed while preventing.

  The automobile channel pipe 5 (hereinafter referred to as “channel pipe 5”) of this embodiment is connected to a fuel tank via a canister. When the pressure in the fuel tank increases due to the fuel vapor generated in the fuel tank, the fuel vapor is sent to the canister through the flow path pipe 5, and the fuel vapor is absorbed by the canister to suppress outflow to the outside. At the same time, when negative pressure is generated on the fuel tank side, the outside air is taken in, the fuel absorbed in the canister is vaporized and sent to the engine, or the outside pressure is introduced into the fuel tank to eliminate the negative pressure. Play a role.

  As shown in FIG. 8, the flow pipe 5 is disposed inside the tire house 2 provided inside the rear fender panel 1, and an end opening device 10 is connected to one end thereof via a clamp 5 a. The other end is connected to a canister (not shown).

  Further, the tire house 2 is defined on the vehicle compartment side by a tire house panel 2a, and the lower part is defined by a protector 2b that covers the upper half of the tire T. Further, a side frame 3 provided with a floor panel 3 a is installed inside the lower portion of the tire house 2. An attachment panel 4 is installed in the tire house 2, and the end opening device 10 is attached to the attachment panel 4. Further, a fuel filler tube 6 is disposed in the tire house 2, one end of which is connected to a fuel filler port and the other end is connected to a fuel tank (not shown) so as not to interfere with the fuel filler tube 6. An end opening device 10 is disposed at the end.

  The “automobile channel pipe” in the present invention is not limited to the channel pipe connected to the canister as described above, but is an automobile channel pipe having an open portion at the end. What is necessary is just to form. Further, the passage pipes may be arranged not only in the tire house but also in places different from the tire house.

  As shown in FIGS. 1 to 6, the end opening device 10 includes a connecting pipe 20 having one end 21 connected to the end of the flow path pipe 5, and the other end 23 side of the connecting pipe 20. A first half chamber 30 (hereinafter referred to as “first chamber 30”) formed integrally, and a space R (see FIG. 6) that is assembled to the first chamber 30 and inside the first chamber 30 And a second half chamber 40 (hereinafter referred to as “second chamber 40”) and an engaging means for holding the first chamber 30 and the second chamber 40 in an assembled state. Further, an opening 25 communicating with the space R is formed on the other end 23 side of the connecting pipe 20, and as shown in FIGS. 2 and 6, the first chamber 30 and the second chamber 40 are assembled. At least one part of the edge part E is provided with an open part S formed such that one edge part is displaced with respect to the other edge part.

  The connecting pipe 20 in this embodiment has a cylindrical shape having a peripheral wall 27. As shown in FIGS. 6 and 7, the end face of the other end 23 is closed and the opening 25 is formed in the peripheral wall. The internal space of the connecting pipe 20 communicates with the space R through the opening 25. The connecting tube is not limited to a cylindrical shape, and may be a square tube or the like.

  The other end portion 23 of the connection pipe 20 is disposed substantially in parallel along the longitudinal direction (axial direction) of the first chamber 30, and as shown in FIG. 7, half of the cross section of the peripheral wall 27 is the first chamber 30. The structure is inserted into the first chamber 30 and connected to the first chamber 30. A plurality of the openings 25 that communicate with the space R are provided in the peripheral wall 27 disposed in the first chamber 30 of the connection pipe 20 (see FIGS. 3 and 6). In this embodiment, a pair of elongated slit-like openings 25 extending along the circumferential direction of the connection pipe 20 are arranged in parallel in the circumferential direction of the connection pipe 20, and the pair of openings 25, 25 are connected to each other. A plurality of rows are provided along the axial direction of the tube 20 (see FIG. 3).

  Next, the first chamber 30 will be described. As shown in FIG. 1 and FIG. 4, the first half chamber 30 in this embodiment has a half-cylindrical shape that extends long along the axial direction of the connecting pipe 20.

  Specifically, as shown in FIG. 7, when the other end portion 23 of the connecting pipe 20 is viewed in a cross section (cross section orthogonal to the axial direction), the cross section is from a position half the cross section of the peripheral wall 27. A pair of side walls 31, 31 erected so as to form an arc shape and extending in a predetermined length in the axial direction of the connection pipe 20, and the other end side of the pair of side walls 31, 31 (other than the connection pipe 20 The end wall 32 that closes the end 23 side and forms the end face of the other end of the connecting pipe 20 and the one end of the pair of side walls 31, 31 are slightly shifted toward the other end of the side wall 31. And an end wall 33 connected to the pair of side walls 31, 31. As described above, the first chamber 30 is configured so that a half of the cross section of the connecting pipe 20 enters the first chamber 30.

  Moreover, the standing direction front-end | tip part of a pair of side walls 31 and 31 and the standing direction front-end | tip part of the edge part walls 32 and 33 comprise the assembly edge part E in this invention. In addition, although the assembly edge part E of each side wall 31 and the end part wall 32 has comprised flat surface shape, as shown in FIG. 7, the assembly edge part E of the end part wall 33 is bent in circular arc shape. The end-side bent surface of the end wall 33 is more than the mating surface of the assembly edge E of the side wall 31 and the assembly edge E of the peripheral wall 41 of the second chamber 40. It has a highly protruding shape.

  Further, as shown in FIGS. 1, 3 and 7, long plate-shaped guide walls are parallel to each other from the inner peripheral surface of the pair of side walls 31, 31 adjacent to the end wall 33. 34 and 34 rise from the inner side of the assembly edge portion E of each side wall 31 at a predetermined height. The guide wall 34 is inserted and arranged on the inner periphery of the second chamber 40 when the second chamber 40 is assembled to the first chamber 30 to guide the second chamber 40. Each guide wall 34 is formed with a first tapered surface 34a on one end portion side of the side wall 31 (see FIG. 5), and a 22nd tapered surface 34a is formed on the outer surface side of the tip portion (see FIG. 5). See 7). The first tapered surface 34a makes it easy to fit a later-described convex portion 46 on the second chamber 40 side into a later-described concave portion 36 on the first chamber 30 side, and the second tapered surface 34b is on the second chamber. The guide wall 34 is easily inserted into the wall 40.

  In addition, engaging concave portions 35 each having a gate-shaped frame shape are formed from both ends in the longitudinal direction of each side wall 31 and from the outside of the assembly edge portion E (four in total). An engagement convex portion 45 described later of the second chamber 40 is engaged with the engagement concave portion 35 from the inside (see FIG. 2). The shape of the engagement recess 35 is not limited to the frame shape as described above, and may be, for example, an engagement piece having a recess formed inside, and is not particularly limited.

  Further, a recessed portion 36 is formed between the guide wall 34 and the engaging recessed portion 35, which is a fitting edge portion E of each side wall 31 and into which a later-described raised portion 46 of the second chamber 30 is fitted. Has been.

  Note that the portion of the connecting pipe 20 where the first chamber 30 is provided and does not enter the first chamber 30 forms a bulging portion 27 </ b> A that bulges from the first chamber 30.

  Next, the second chamber 40 will be described. As shown in FIG. 1, the second chamber 40 in this embodiment has a half-cylindrical shape that extends long along the axial direction of the connecting pipe 20 so as to fit the first chamber 30. When assembled in the chamber 30, a chamber having a substantially cylindrical shape as a whole and having a space R therein is formed.

  The second chamber 40 has an arc shape with a semicircular cross section, and has a peripheral wall 41 extending in a predetermined length in the axial direction, and a semicircular disk shape connected to both longitudinal ends of the peripheral wall 41. And end walls 42 and 43. That is, as shown in FIG. 3, the end wall 42 is disposed on the first chamber 30 side with the second chamber opened with respect to the first chamber 30, and the end portion on the side away from the first chamber 30. A wall 43 is arranged. Moreover, the circumferential direction edge part of the surrounding wall 41 and the protrusion direction edge part of a pair of edge part walls 32 and 33 comprise the assembly edge part E. As shown in FIG.

  Further, as shown in FIGS. 1 and 4, the assembly edge E of the one end wall 42 of the second chamber 40 and the assembly edge of the one end wall 32 of the first chamber 30. E is connected by a thin hinge portion 47, and the first chamber 30 and the second chamber 40 have a structure integrally formed through the thin hinge portion 47. The two chambers 30 and 40 can be opened and closed vertically by bending the thin hinge 47.

  Further, as shown in FIG. 1, projecting engagement protrusions 45 are provided on both ends in the longitudinal direction of the peripheral wall 41 and on the outer sides of the assembly edge portions E at both ends in the circumferential direction. The engagement protrusions 45 are engaged with the engagement recesses 35 of the first chamber 30 from the inside (see FIGS. 2 and 7).

  Further, as shown in FIGS. 1 and 5, the convex portion 46 is located on the other end portion side in the longitudinal direction of the peripheral wall 41 (on the end wall 43 side) from the end surface of the assembly edge portion E at both ends in the circumferential direction. , 46 are respectively provided so as to be fitted into the recesses 36, 36 of the first chamber 30, respectively.

  When the second chamber 40 is closed by bending the thin hinge portion 47 in a state where the second chamber 40 is opened with respect to the first chamber 30 shown in FIG. 1 and FIG. The convex portion 46 of the second chamber 40 is fitted into the concave portion 36, and the assembly edge E of the first chamber 30 and the assembly edge E of the second chamber 40 are in contact with each other, When the second chamber 40 is assembled, and the engagement concave portion 35 of the first chamber 30 and the engagement convex portion 45 of the second chamber 40 are engaged with each other, both chambers 30 and 40 are assembled. Is to be retained.

  That is, in this embodiment, the engagement recess 35 and the engagement protrusion 45 constitute the “engagement means” in the present invention, and the recess 36 and the protrusion 46 constitute the “fitting portion” in the present invention. ing.

  As the engaging means, for example, an engaging convex portion may be provided on the first chamber side and an engaging concave portion may be provided on the second chamber side, or the engaging convex portions may be engaged with each other. There is no particular limitation.

  Moreover, as a fitting part, a convex part may be provided in the 1st chamber side and a recessed part may be provided in the 2nd chamber side, for example, It does not specifically limit. The fitting portion is an assembly edge portion E of the first chamber 30 and the second chamber 40, and is between the guide wall 34 and the engaging means including the engaging concave portion 35 and the engaging convex portion 45. Is provided.

  In the state where the first chamber 30 and the second chamber 40 are assembled, as shown in FIG. 6, the end wall 43 of the second chamber 40 is more than the end wall 33 of the first chamber 30. Also, the connecting pipe 20 protrudes toward the one end 21 side, and the assembly edge E of both the chambers 30 and 40 is displaced in the axial direction so as to communicate with the space R and open to the outside of the chamber. Is to be provided.

  In this embodiment, as shown in FIG. 6, the first chamber 30 and the second chamber 40 are assembled to each other on the side opposite to the thin hinge portion 47 of the first chamber 30 and the second chamber 40. In the assembling edge portion E, the distance from the thin hinge portion 47 is such that one edge portion (the assembling edge portion E of the end wall 43 of the second chamber 40) is the other edge portion (the end of the first chamber 30). Since it is set to be larger than the assembling edge E) of the part wall 33, the one edge is displaced with respect to the other edge, so that the opening S is provided. Yes.

  Further, in the state where the assembled state of the first chamber 30 and the second chamber 40 is maintained, as shown in FIG. 7, the other end 23 side of the connection pipe 20 is arranged in the axial direction of the connection pipe 20. As seen in a cross-section (transverse cross-section) along, the assembly edge portion E of the peripheral wall 41 of the second chamber 40 is sandwiched between the engagement recess 35 and the guide wall 34 of the first chamber 30, The assembly edge E of the side wall 31 and the assembly edge E of the peripheral wall 41 come into contact with each other.

  In this embodiment, when the first chamber 30 and the second chamber 40 are assembled, the end surface of the assembly edge E of each wall 31, 32, 33 of the first chamber 30 and the second chamber 40, the end surfaces of the assembly edges E of the walls 41, 42, and 43 are brought into contact with each other and brought into contact with each other, but the wall of the assembly edge on the first chamber side and the assembly on the second chamber side The wall portion of the edge portion may be overlapped with a predetermined length to such an extent that the sealing property can be maintained. In the case of this embodiment, the thin hinge portion that connects the first chamber and the second chamber connects the end walls in the longitudinal direction of the chamber and opens both chambers 30 and 40 vertically. However, both end portions in the circumferential direction may be connected to open both chambers 30 and 40 (this will be described in other embodiments), and there is no particular limitation.

  In addition, both the chambers 30 and 40 in this embodiment are each formed in a half-cylindrical cylindrical shape, and are assembled to constitute a substantially cylindrical chamber that extends long in the axial direction of the connecting pipe 20, As the chamber shape, for example, it may be a rectangular tube shape or an elliptical tube shape, or it may be a horizontally long tube shape in which the direction orthogonal to the axial direction of the connecting tube is wide. There is no limitation.

  Returning to the description of the connection pipe 20 again, as shown in FIGS. 1 to 4, the connection pipe 20 of this embodiment has an end portion 21 connected to the flow path pipe 5 and the first chamber 30 integrally formed. A clip 50 for being attached to the vehicle body of the automobile is integrally formed with the other end portion 23 formed.

  In this embodiment, a frame-shaped pedestal portion 51 protrudes from the peripheral wall 27 of the connection tube 20 in a direction orthogonal to the axial direction of the connection tube 20, and the clip 50 is interposed via the pedestal portion 51. Is provided. The clip 50 includes a flange portion 52 connected to the pedestal portion 51, a column portion 53 suspended from the back surface of the flange portion 52, and a diagonally outward direction from the tip of the column portion 53 toward the flange portion 52 side. And a pair of elastic engagement pieces 54, 54 extending in a foot-like manner, and provided in a direction orthogonal to the axial direction of the connection pipe 20 (laterally to the connection pipe 20) as a whole. ing.

  Then, the pair of elastic engagement pieces 54, 54 engages with the rear peripheral edge of the mounting hole (not shown) of the mounting panel 4 shown in FIG. 8, and the flange portion 52 comes into contact with the front side of the mounting hole, so that the clip 50 is Accordingly, the end opening device 10 is attached to the body of the automobile. In this embodiment, the end opening device 10 is attached to the vehicle body via the clip 50 so that the opening S provided in the first chamber 30 and the second chamber 40 opens downward (FIG. 8). reference).

  The shape and structure of the clip are not particularly limited. For example, a plurality of elastic engagement pieces extending in the radial direction from the outer periphery of the columnar part may be provided, as long as the clip can be attached to the vehicle body.

  Next, effects of the end opening device 10 according to the present invention having the above-described configuration will be described.

  First, the process of assembling the chamber will be described.

  As shown in FIGS. 1 and 3 to 5, when the second chamber 40 is opened with respect to the first chamber 30, the second half chamber 40 is moved with respect to the first chamber 30 while bending the thin hinge portion 47. Close. Then, the pair of guide walls 34, 34 of the first chamber 30 is inserted into the inner periphery of the peripheral wall 41 of the second chamber 40, and the second chamber 40 is pushed in while being guided by the same pair of guide walls 34, 34. It is. When the second chamber 40 is further closed, the convex portion 46 of the second chamber 40 is fitted into the concave portion 36 of the first chamber 30, and the end surface of the assembly edge portion E of each wall 31, 32 of the first chamber 30. The end surfaces of the assembling edges E of the walls 41 and 42 of the second chamber 40 are in contact with each other, the second chamber 40 is closed with respect to the first chamber 30, and the first chamber 30 and the second chamber 40 are closed. Are further assembled, and further, the respective engagement convex portions 45 of the second chamber 40 are engaged with the respective engagement concave portions 35 of the first chamber 30 from the inside, whereby the assembled state is maintained.

  The assembly edge portion E of the end wall 33 of the first chamber 30 is displaced with respect to the end wall 43 of the second chamber 40 in the axial direction of the connecting pipe 20. It is possible to provide an open portion S that communicates with the space R formed in (see FIG. 6).

  Further, in this embodiment, as described above, when the first chamber 30 and the second chamber 40 are assembled, the guide wall 34 of the first chamber 30 is inserted into the inner periphery of the second chamber 40, While the guide chamber 34 guides the second chamber 40, the engagement convex portion 45 provided in the second chamber 40 engages with the engagement concave portion 35 provided in the first chamber 30 from the inside. The assembling workability of the chambers 30 and 40 can be improved, and the first chamber 30 and the second chamber 40 can be firmly engaged so as not to be displaced inward and outward. Furthermore, one of the assembly edges E of the first chamber 30 and the second chamber 40 is between the guide wall 34 and the engaging means (the engaging concave portion 35 and the engaging convex portion 45) (here, the first one). Since the fitting part which consists of the recessed part 36 provided in the chamber 30) and the convex part 46 provided in the other (here 2nd chamber 40) is provided, the engagement provided in the 1st chamber 30 The concave portion 35 and the engaging convex portion 45 provided in the second chamber 40 can be reliably aligned and engaged, and the variation in the passage area in the chamber can be suppressed and the chamber performance can be maintained. it can.

  Further, as described above, the second chamber 40 is closed with respect to the first chamber 30, and the guide wall 34 of the first chamber 30 is inserted into the peripheral wall 41 of the second chamber 40, so that the second chamber 40 When the engagement convex portion 45 engages from the inside of the engagement concave portion 35 of the first chamber 30, the assembly edge portion E side of the peripheral wall 41 of the second chamber 40 tends to bend and deform in the outer diameter direction ( (See FIG. 7). Even in such a case, as shown in FIG. 7, the assembly edge portion E of the peripheral wall 41 of the second chamber 40 is sandwiched between the engaging recess 35 and the guide wall 34 of the first chamber 30, and the peripheral wall 41. Since the engagement recess 35 is disposed outside the assembly edge E, the engagement projection 45 is formed from the inside of the engagement recess 35 while bending the assembly edge E of the peripheral wall 41 in the outer diameter direction. The second chamber 40 can be securely assembled to the first chamber 30.

  Further, when the second chamber 40 is closed with respect to the first chamber 30, for example, the second chamber 40 is held with respect to the first chamber 30 by holding the connection pipe 20 in the hand, The chamber 40 is closed. At this time, as shown in FIG. 9, if the bulging portion 27A of the connecting tube 20 that bulges from the first chamber 30 is located between the thumb and another finger, the hand becomes painful. Therefore, as shown in FIG. 10, the connecting tube 20 is changed so that the bulging portion 27A of the connecting tube 20 is located at the belly portion of the thumb, and the bulging portion 27A of the connecting tube 20 is adapted to the hand, Since the first chamber 30 and the second chamber 40 are gripped, the assembly workability of the first chamber 30 and the second chamber 40 can be improved.

  After assembling the first chamber 30 and the second chamber 40 as described above and providing the opening S, the one end 21 of the connection pipe 20 is inserted into one end of the flow path pipe 5 and the clamp 5a. The one end of the flow pipe 5 is connected to one end of the connection pipe 20 by tightening and fixing. Thereafter, the pair of elastic engagement pieces 54 and 54 of the clip 50 provided on the connection pipe 20 are inserted into a mounting hole (not shown) of the mounting panel 4 shown in FIG. By bringing the flange portion 52 into contact with the front side, the end opening device 10 can be attached to the vehicle body of the automobile via the clip 50. In this state, the opening S provided in the first chamber 30 and the second chamber 40 opens downward.

  Thus, in this embodiment, the clip 50 is integrated between the one end 21 of the connection pipe 20 connected to the flow path pipe 5 and the other end 23 in which the first chamber 30 is integrally formed. Is formed. Therefore, by fixing the clip 50 integrally formed with the connection pipe 20 to the vehicle body, the connection pipe 20 connected to the flow path pipe 5 can be fixed near the flow path pipe 5. The flow path pipe 5 can be firmly supported through the pipe 20. Further, the provision of the clip 50 on the connecting pipe 20 also serves as a guideline for inserting the one end 21 of the connecting pipe 20 into the one end of the flow channel pipe 5.

  When the internal pressure of the fuel tank increases, the fuel vapor is sent to the canister through the fuel vapor pipe via the check valve disposed in the fuel tank, absorbed by the activated carbon in the canister, and absorbed by the canister. Excess air that has not passed is discharged from the opening portion S of the end opening device 10 through the flow path pipe 5. Also, when the engine is operated and the intake manifold becomes negative pressure or the fuel tank becomes negative pressure, the inside of the flow path pipe 5 becomes negative pressure via the canister connected to both, and the end opening device 10 The outside air is sucked from the open portion S of this, and this air passes through the space R, the elongated slit-like opening 25 formed in the peripheral wall of the connection pipe 20, the connection pipe 20, and the flow path pipe 5 to the canister. The fuel introduced and adsorbed on the activated carbon of the canister is vaporized and supplied to the engine through the intake manifold or returned to the fuel tank.

  At this time, in the present invention, the outside air passes through the space R from the open portion S formed by shifting one of the assembly edge portions E of the first chamber 30 and the second chamber 40 with respect to the other, Since it is configured to flow in through an elongated slit-like opening 25 formed in the peripheral wall of the connecting pipe 20, as shown in FIG. 6, the inflow path can be a curved path (see arrow A). Insects drifting to the outside, foreign matters such as dust, dust and the like are less likely to enter the connection pipe 20, and an external fluid can be allowed to flow in while preventing foreign matter from entering.

  Further, since the first chamber 30 is formed integrally with the connecting pipe 20, the opening portion S can be formed by a simple operation of assembling the second chamber 40 to the first chamber 30. A simple structure can be obtained by reducing the number of points. Furthermore, since the first chamber 30 and the second chamber 40 are assembled and the open portion S is formed by shifting the position of at least one of the assembly edge portions E, as shown in FIG. Even if the tube 20 is not bent as in the conventional flow channel tube 100 (see the imaginary line in FIG. 8), it is possible to make the open portion S downward or sideways to make it difficult for foreign matter to enter. In addition, since it is not necessary to bend the connecting pipe 20, the end opening device 10 can be made compact to save space, and the length of the connecting pipe 20 can be shortened to be affected by the vibration of the automobile. Can be difficult.

  Further, as shown in FIG. 8, compared to the lower end position B1 of the open portion S when the open portion S is bent downward in a substantially U shape as in the conventional flow channel tube 100, this end In the part opening device 10, since the lower end position B2 of the opening part S can be secured high, even if the water volume on the road surface or parking lot increases due to heavy rain or storm, the water from the opening part S Can be difficult to penetrate.

  In this embodiment, the other end 23 of the connection pipe 20 is connected to the first chamber 30, and a part of the peripheral wall 27 is disposed in the first chamber 30. A plurality of openings 25 communicating with the space R are provided in the peripheral wall 27 disposed in the chamber 30. As described above, by providing the plurality of openings 25 communicating with the space R in the peripheral wall 27 of the connection pipe 20, it is possible to secure a large area of the entire opening, thereby reducing the flow resistance of outside air, fuel vapor, and the like. The inflow path can be more easily bent, and the entry of foreign matter from the outside can be more effectively suppressed.

  Further, in this embodiment, as shown in FIG. 7, half of the cross section of the connection pipe 20 enters the first chamber 30 and is connected to the first chamber 30. The one chamber 30 can be easily formed integrally, and the peripheral wall 27 of the connecting pipe 20 that has entered the first chamber 30 is made as wide as possible, and a region in which the opening 25 communicating with the space R is provided is widened. The flow resistance can be further reduced.

  In this embodiment, the first chamber 30 and the second chamber 40 are integrally formed through the thin hinge portion 47, and the first chamber 30 and the second chamber 40 are on the opposite side of the thin hinge portion 47. In the edge portion E (here, the edge portion E of the end wall 33 of the first chamber 30 and the end wall 43 of the second chamber 40), the distance from the thin hinge portion 47 is one edge portion ( The assembly edge portion E) of the end wall 43 of the second chamber 40 is displaced by being set larger than the other edge portion (assembly edge portion E of the end wall 33 of the first chamber 30). , An opening S is provided (see FIG. 6).

  As described above, the connecting pipe 20, the first chamber 30, and the second chamber 40 can all be integrally formed, and the assembly edge portion on the opposite side of the thin hinge portion 47 of the first chamber 30 and the second chamber 40. In E, since the distance from the thin hinge 47 is set so that one edge is set larger than the other edge, the opening S is provided. The inflow path that communicates with the open portion S can be folded back (see arrow A in FIG. 6) to make it difficult for foreign matter from entering the connecting pipe 20 (effect of claim 4).

  11 and 12 show another embodiment of the end opening device for an automobile channel pipe according to the present invention. Note that substantially the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The end opening device 10A (hereinafter referred to as “end opening device 10A”) of the automobile channel pipe of this embodiment includes both longitudinal ends of one side wall 31 of the first chamber 30 and the peripheral wall of the second chamber 40. Both ends in the longitudinal direction of one end in the circumferential direction of 41 are connected by thin-walled hinge portions 47 and 47 so that the first chamber 30 and the second chamber 40 are integrally formed. As a result, both chambers 30 and 40 are configured to open and close (laterally open) in the circumferential direction of the connecting pipe 20 via the pair of thin hinge portions 47 and 47.

  Further, the second chamber 40 protrudes like a box in the outer diameter direction at the other circumferential end (the circumferential end opposite to the circumferential end where the thin hinge portion 47 is provided), and the second chamber 40 An open portion forming frame portion 57 having an opening in the closing direction of the chamber 40 is provided. Furthermore, engagement convex portions 45 and 45 constituting engagement means are formed at the other end in the circumferential direction of the second chamber 40 and at both ends in the longitudinal direction, and the thin hinge portion 47 of the first chamber 30 is formed. Engagement recesses 35 and 35 that engage with the engagement projections 45 are formed at both ends in the longitudinal direction of the side wall 31 on the opposite side.

  Then, as shown in FIG. 11, when the second chamber 40 is closed with the second chamber 40 opened relative to the first chamber 30, the assembly edge E of the first chamber 30 and the second chamber 40 The assembling edge E comes into contact with each other, the two chambers 30 and 40 are assembled, and the engaging concave portion 35 and the engaging convex portion 45 are engaged to maintain the assembled state. In this state, as shown in FIG. 12, the open portion of the second chamber 40 provided on one assembly edge E on the opposite side of the thin-walled hinge portion 47 of the first chamber 30 and the second chamber 40. The forming frame portion 57 is displaced by projecting larger than the side wall 31 of the first chamber 30 that is the other assembly edge portion E, so that the opening portion S communicates with the space R and opens to the outside of the chamber. Is to be provided.

  Further, the present invention is not limited to the above-described embodiments, and various modified embodiments are possible within the scope of the present invention, and such embodiments are also included in the scope of the present invention. .

5 Automotive channel pipe (channel pipe)
10, 10A End opening device for automobile channel pipe (end opening device)
20 connecting pipe 21 one end 23 other end 25 opening 27 peripheral wall 30 first half chamber (chamber)
34 Guide wall 35 Engaging recess 36 Recess 40 Second half chamber (chamber)
47 Thin hinge part 50 Clip E Assembly edge R Space S Open part

Claims (6)

An end opening device for an automobile channel pipe connected to an end of an automobile channel pipe to form an open part while preventing foreign matter intrusion,
A connecting pipe having one end connected to an end of the automobile channel pipe, a first half chamber formed integrally with the other end of the connecting pipe, and the first half chamber A second half chamber that forms a space inside the first half chamber, and an engagement means that holds the first half chamber and the second half chamber in an assembled state.
An opening communicating with the space is formed on the other end side of the connection pipe,
That at least one of the assembly edge portions of the first half chamber and the second half chamber is provided with an open portion in which one edge portion is displaced from the other edge portion; A device for opening an end portion of a flow channel pipe for an automobile.   The other end portion of the connection pipe is connected to the first half chamber, a part of the peripheral wall thereof is disposed in the first half chamber, and the peripheral wall disposed in the first half chamber of the connection pipe. The apparatus for opening an end of an automobile channel pipe according to claim 1, further comprising: a plurality of openings communicating with the space.   The said connection pipe is arrange | positioned in parallel with the longitudinal direction of the said 1st half chamber, The half of the cross section penetrates in the said 1st half chamber, and is connected with the said 1st half chamber. An end opening device for an automobile channel pipe.   The first half chamber and the second half chamber are integrally formed through a thin hinge portion, and the first half chamber and the second half chamber are formed by bending the thin hinge portion. The assembled state is maintained by the engaging means, and at the assembly edge of the first half chamber and the second half chamber opposite to the thin hinge portion, The distance from the thin hinge portion is shifted by setting one edge portion to be larger than the other edge portion, and the opening portion is provided. A device for opening an end of an automobile channel pipe as described. The first half chamber has a guide wall inserted into the inner periphery of the second half chamber when the second half chamber is assembled.
The engaging means includes a frame-shaped or recessed engaging recess provided at an assembly edge of the first half chamber, and the second half chamber is engaged with the engaging recess from the inside. It is composed of mating engaging projections,
Between the guide wall and the engaging means of the assembly edge of the first half chamber and the second half chamber, a recess provided on one side and a projection provided on the other side The end part opening | release part of the flow-path pipe for motor vehicles as described in any one of Claims 1-4 in which the fitting part which consists of a part is provided.   The connecting pipe is integrally formed with a clip for attaching to the vehicle body between one end connected to the automobile channel pipe and the other end formed integrally with the first half chamber. The end part apparatus of the flow-path pipe for motor vehicles as described in any one of Claims 1-5.