JP5664963B2 - Canister piping fixing structure - Google Patents

Description

  The present invention relates to a canister pipe fixing structure, and more particularly to a canister pipe fixing structure in which the productivity of a pipe fixing clamp for fixing a pipe to a canister for collecting evaporated fuel is improved.

In an internal combustion engine mounted on a vehicle, a canister for processing evaporated fuel generated in a fuel tank is attached to a vehicle body. The canister is provided with an evaporation pipe connection part, a purge pipe connection part, and an air release pipe connection part on the canister body. An evaporation pipe for introducing evaporated fuel from the fuel tank is connected to the evaporation pipe connecting portion. A purge pipe for supplying evaporated fuel to the internal combustion engine is connected to the purge pipe connection portion. An atmospheric open pipe for introducing outside air for separating the evaporated fuel is connected to the atmospheric open pipe connecting portion.
The canister is provided with at least two attachment portions for attaching to the vehicle body on the outer peripheral portion of the canister body. At least one of these two or more attachment parts is attached with a pipe fixing clamp having a clamp part for fixing the pipe, and the canister pipe such as the evaporation pipe is fixed to the clamp part.

  A conventional structure for fixing pipes to the canister body has a structure as shown in JP-A-10-213023. In the canister of this publication, the canister body is formed of a resin material, and the canister body has a substantially vertical cube shape having four planar surfaces on the outer peripheral portion and having an upper portion and a bottom portion. The canister is provided with attachment portions for attaching the canister to the vehicle body on at least two of the four outer peripheral portions of the canister body so that the attachment direction to the vehicle body can be changed. The canister has a pipe fixing clamp having a shape similar to that of the bracket for fixing the vehicle body to the mounting part that is not used for mounting the canister to the vehicle body out of the two mounting parts. Was fixed to the canister body.

Japanese Patent Laid-Open No. 10-213023

By the way, the conventional pipe fixing clamp is a metal body fixing bracket that attaches a canister to the vehicle body, and is brazed with a metal pipe that connects the pipe. The process of brazing and these plating processes was necessary, and the manufacturability was poor.
In addition, since the conventional pipe fixing clamp is made of metal, it may be deformed at the time of a vehicle collision and damage a resin canister.

  An object of the present invention is to improve the manufacturability of a pipe fixing clamp that fixes pipes to a canister body, and to prevent the pipe fixing clamp from damaging the canister body when a vehicle collides.

According to the present invention, at least two attachment portions for attaching the canister to the vehicle body are provided on the outer peripheral portion of the canister body, and a pair of guide portions extending in the vehicle vertical direction are connected to the attachment portion, and the connection portions connecting the guide portions. The guide portions are inclined with respect to the vertical direction so that the distance between the guide portions decreases toward the lower side in the vertical direction, and the guide portions are viewed from the vertical direction. A canister in which a pipe fixing clamp having a clamp portion for fixing a pipe is attached to at least one of the attachment portions, and a canister pipe is fixed to the clamp portion. In the piping fixing structure, the piping fixing clamp is formed from a base portion straddling the guide portion and a back surface side of the base portion. A clamp that includes a pair of side wall portions that extend in a direction orthogonal to the base portion and sandwiches the outer surface of the guide portion, and clamps and fixes a pipe together with a pipe holding portion provided on the base portion on the surface side of the base portion. An opening is formed in the base portion so as to face the back surface of the clamp portion, and the entire pipe fixing clamp is integrally formed of a resin material , and the pipe fixing clamp is on the surface side of the base portion. A grid-like rib is arranged on the base plate, and each of the openings is opened in a planar base part surrounded by the grid-like rib .

  The canister pipe fixing structure of the present invention can integrally form the pipe fixing clamp with resin, so that the productivity of the pipe fixing clamp can be improved and the strength of the pipe fixing clamp can be set lower than the strength of the canister body. The canister body can be structured so as not to be damaged when the vehicle collides.

FIG. 1 is a left side view of the canister. (Example) FIG. 2 is a plan view of the canister. (Example) FIG. 3 is a front view of the canister. (Example) FIG. 4 is a perspective view of a pipe fixing clamp. (Example) FIG. 5 is a front view of the pipe fixing clamp. (Example) FIG. 6 is a left side view of the pipe fixing clamp. (Example) 7 is a cross-sectional view taken along line AA of the pipe fixing clamp shown in FIG. (Example) FIG. 8 is a cross-sectional view of the pipe fixing clamp shown in FIG. (Example)

  Embodiments of the present invention will be described below with reference to the drawings.

1 to 8 show an embodiment of the present invention. 1 to 3, 1 is a canister, and 2 is a canister body. The canister 1 has a canister body 2 made of a resin material. The canister body 2 is formed in a substantially vertical cubic shape having a flat four surfaces 3 a to 3 d on the outer peripheral portion 3 and having a substantially square-shaped top portion 4 and bottom portion 5.
The upper part 4 of the canister body 2 is provided with an evaporation pipe connection part 6, a purge pipe connection part 7, and an air release pipe connection part 8 for connecting the pipe for the canister. An evaporation pipe 9 for introducing evaporated fuel from the fuel tank is connected to the evaporation pipe connecting portion 6. A purge pipe 10 for supplying evaporated fuel to the internal combustion engine is connected to the purge pipe connection portion 7. Connected to the atmosphere release pipe connection portion 8 is an atmosphere release pipe 11 for introducing outside air for separating the evaporated fuel.
Further, the canister 1 is provided with at least two attachment portions for attaching to the vehicle body on the outer peripheral portion 3 of the canister body 2. As shown in FIGS. 2 and 3, the canister 1 of this embodiment includes a first mounting portion 12 and a second mounting portion 13 on at least two surfaces 3 a and 3 b among the four surfaces 3 a to 3 d of the outer peripheral portion of the canister body 2. Is provided. The first attachment portion 12 and the second attachment portion 13 are formed in a common shape, and the first attachment portion 12 is provided on the wide surface 3a and the second attachment portion 13 is provided on the narrow surface 3b. The first attachment portion 12 is provided at a higher position on the upper 4 side than the second attachment portion 13.

The first mounting portion 12 includes a pair of guide portions 14 and 15 extending in the vehicle vertical direction, and a plurality of connecting portions 16 extending in the horizontal direction for connecting the guide portions 14 and 15. When viewed from the horizontal direction, the first mounting portion 12 is inclined with respect to the vertical direction so that the distance between the guide portions 14 and 15 decreases toward the lower side in the vertical direction (second mounting in FIG. 3). 2), when viewed from the vertical direction as shown in FIG. 2, the guide portions 14 and 15 are extended from the joint portion to the canister body 2 in a direction in which the distance between the guide portions 14 and 15 increases. The first mounting portion 12 is separated into a first upper mounting portion 12U and a first lower mounting portion 12L with a discontinuous portion 17 in the middle in the vertical direction.
The second mounting portion 13 includes a pair of guide portions 18 and 19 extending in the vehicle vertical direction, and a plurality of connecting portions 20 extending in the horizontal direction connecting the guide portions 18 and 19. As shown in FIG. 3, the second mounting portion 13 is inclined with respect to the vertical direction so that the distance between the guide portions 17 and 18 decreases toward the lower side in the vertical direction when viewed from the horizontal direction. As shown in FIG. 2, when viewed from the vertical direction, the guide portions 18 and 19 are extended from the joint portion to the canister body 2 in a direction in which the distance between the guide portions 18 and 19 increases. The second attachment portion 13 is separated into a second upper attachment portion 13U and a second lower attachment portion 13L with a discontinuous portion 21 in the middle in the vertical direction.
The canister 1 attaches a vehicle body mounting bracket to any one of the first mounting portion 12 and the second mounting portion 13 having a common shape, and attaches the vehicle body mounting bracket to the vehicle body to thereby change the mounting direction with respect to the vehicle body. It can be changed.

The canister 1 has a pipe fixing clamp 22 for fixing a canister pipe at one of the first mounting part 12 and the second mounting part 13 having a common shape to which the body mounting bracket is not mounted. It is attached. In this embodiment, as shown in FIG. 1, the pipe fixing clamp 22 is described as being attached to the second upper attachment portion 13U of the second attachment portion 13.
As shown in FIGS. 4 to 8, the pipe fixing clamp 22 includes a planar base portion 23 having a length straddling both sides in the width direction of the pair of guide portions 18 and 19 of the second upper mounting portion 13 </ b> U, and the base. A pair of planar side wall portions 24 and 25 that extend in a direction orthogonal to the back surface side of the portion 23 and sandwich the outer surfaces on both sides of the guide portions 18 and 19 are provided. When viewed from the horizontal direction, the pair of side wall parts 24 and 25 are inclined with respect to the vertical direction so that the distance between the pair of side wall parts 24 and 25 becomes narrower toward the lower side in the vertical direction, similar to the guide parts 18 and 19. . The lowermost ends of the base portion 23 and the side wall portions 24 and 25 are connected by a lower wall portion 26.

From the pair of side wall portions 24 and 25, claw portions 27 and 28 that come into contact with the back surfaces of the pair of guide portions 18 and 19 of the second upper mounting portion 13 </ b> U are respectively projected. The claw portions 27 and 28 are parallel to the guide portions 18 and 19 when viewed from the horizontal direction, and are inclined with respect to the vertical direction so that the distance between the claw portions 27 and 28 decreases toward the lower side in the vertical direction. When viewed, the distance between the side walls 24 and 25 extends in the direction in which the distance between the side walls 24 and 25 decreases.
On the other hand, two parallel rib-shaped pipe holding portions 29 and 30 are provided on the surface side of the base portion 23 so as to be positioned between the pair of claw portions 27 and 28 when viewed from the horizontal direction. At the same time, a clamp 31 is provided between the two pipe holders 29 and 30 so as to sandwich and fix the pipe. The pipe holding parts 29 and 30 and the clamp part 31 are formed in an arc shape so as to sandwich the pipes when viewed from the vertical direction. When viewed from the horizontal direction, the clamp portion 31 is disposed between the two parallel pipe holding portions 29 and 30, and is fixed to the base portion 23 with one end side as a fixed end and the other end side as a free end. A pipe introduction part 32 extending outward from the peripheral surface of the pipe is provided. When the pipe is inserted into the clamp part 31 from the gap between the pipe holding parts 29 and 30 and the pipe introduction part 32, the clamp part 31 is elastically deformed around the fixed end on one end side, and the free end on the other end side. The fixed end is fixed to the base portion 23 so that the end contacts and separates from the pipe holding portions 29 and 30.

The base portion 23 is formed with openings 33 to 35 for punching when the claw portions 27 and 28 and the clamp portion 31 are formed of resin. On the surface side of the planar base portion 23, lattice-like ribs 36 surrounding the openings 33 to 35 are arranged. The grid-like ribs 36 include two parallel rib-shaped pipe holding portions 29 and 30 as part of the horizontal ribs 36h and 36h extending in the horizontal direction, and the horizontal ribs 36h and 36h extending in the vertical direction. Are connected to form a grid.
In addition, a lock piece 38 is formed in the base portion 23 by a substantially U-shaped groove portion 37 on the upper portions of the pipe holding portions 29 and 30. The lock piece 38 has a protrusion 39 that engages with the connecting portion 20 of the second upper mounting portion 13U on the back surface side, and the lower end side can be elastically deformed in the contact / separation direction with respect to the connecting portion 20 around the upper end. Is formed. On the surface side of the planar base portion 23, the vertical ribs 36v and 36v of the rib 36 are extended so as to surround the groove portion 37.
Thus, the pipe fixing clamp 22 including the base part 23, the side wall parts 24 and 25, the lower wall part 26, the claw parts 27 and 28, the pipe holding parts 29 and 30, the clamp part 31, and the rib 36 is entirely Are integrally formed of a resin material.

The canister 1 has a vehicle body mounting bracket attached to, for example, the first mounting portion 12 of the two first mounting portions 12 and the second mounting portions 13 provided on the canister body 2, and the vehicle body mounting bracket is attached to the vehicle body. Install. The canister 1 attached to the vehicle body is piped to the second upper attachment portion 13U of the other second attachment portion 13 of the two first attachment portions 12 and the second attachment portion 13 to which the vehicle body attachment bracket is not attached. A fixing clamp 22 is attached.
At the time of attachment, the pipe fixing clamp 22 is disposed in the discontinuous portion 21 on the lower side of the second upper attachment portion 13U, and the claw portions 27 and 28 are brought into contact with the back sides of the guide portions 18 and 19, respectively. When the pipe fixing clamp 22 is lifted from this state, the pipe fixing clamp 22 rises in the vertical direction along the guide parts 18 and 19 by the claw parts 27 and 28. The rising pipe fixing clamp 22 is configured such that the lower wall portion 26 abuts on the lower connecting portion 20, and the protrusion 39 of the lock piece 38 engages with the upper connecting portion 20. It is attached to 13U.
The pipe fixing clamp 22 attached to the second upper attachment part 13U is fixed by sandwiching the air release pipe 11 connected to the air release pipe connection part 8 between the pipe holding parts 29, 30 and the clamp part 31. To do. The air release pipe 11 fixed to the clamp part 31 is guided downward.

The canister 1 is not used for attachment to the vehicle body by using the first attachment portion 12 and the second attachment portion 13 for attachment to the vehicle body provided at least two places on the outer peripheral portion 3 of the canister body 2. A pipe fixing clamp 22 is attached to the second upper attachment portion 13U of the attachment portion 13. The pipe fixing clamp 22 includes a base portion 23 straddling the guide portions 18 and 19 of the second upper mounting portion 13U and a pair of side wall portions 24 and 25 sandwiching the outer surface of the guide portions 18 and 19, and a pair of side wall portions. The claw portions 27 and 28 that come into contact with the back surfaces of the pair of guide portions 18 and 19 are projected from 24 and 25, and the pipe holding portions 29 and 30 and the clamp portion 31 are provided on the surface side of the base portion 23. 23, openings 33 to 35 for punching the claw portions 27 and 28 and the clamp portion 31 are formed, and the entire pipe fixing clamp 22 is integrally formed of a resin material.
As a result, the canister piping fixing structure allows the piping fixing clamp 22 to be integrally formed of a resin material, so that the productivity of the piping fixing clamp 22 can be improved, and the strength of the piping fixing clamp 22 can be increased. The strength of the main body 2 can be set lower than that of the main body 2, and the canister main body 2 can be structured so as not to be damaged when the vehicle collides.
The pipe fixing clamp 22 has a grid-like rib 36 disposed on the surface side of the base portion 23, and the openings 33 to 35 are opened to the planar base portion 23 surrounded by the grid-like rib 36. ing.
As a result, the canister piping fixing structure can reinforce the planar base portion 23 in which the openings 33 to 35 are formed by the grid-like ribs 36, and the piping fixing clamp 22 is deformed to be attached to the second upper side. It is possible to prevent separation from the portion 13U.
In this embodiment, the pipe fixing clamp 22 is attached to the second upper attachment portion 13U of the second attachment portion 13 provided on the narrow surface 3b of the canister body 2, but is provided on the wide surface 3a. It can also be attached to the first upper attachment portion 12U of the first attachment portion 12 having a common shape.

  The present invention improves the manufacturability of a pipe fixing clamp for fixing pipes to a canister body, and allows the pipe fixing clamp to have a structure that does not damage the canister body in the event of a vehicle collision. It can be applied to fix the air bleeding hose of the reserve tank.

DESCRIPTION OF SYMBOLS 1 Canister 2 Canister body 3 Outer peripheral part 4 Upper part 5 Bottom part 11 Atmospheric release pipe 12 1st attachment part 13 2nd attachment part 13U 2nd upper attachment part 13L 2nd lower attachment part 18, 19 Guide part 20 Connection part 21 Discontinuity Part 23 Base part 24, 25 Side wall part 26 Lower wall part 27, 28 Claw part 29, 30 Pipe holding part 31 Clamp part 33 to 35 Opening part 36 Grid-shaped rib 37 Groove part 38 Lock piece

Claims (1)

At least two or more mounting portions for mounting the canister to the vehicle body are provided on the outer periphery of the canister body.
A pair of guide portions extending in the vehicle up-down direction and a connecting portion for connecting the guide portions to the mounting portion;
When the guide portions are inclined with respect to the vertical direction so that the distance between the guide portions decreases toward the lower side in the vertical direction, and the attachment portion is viewed from the vertical direction, the guide portions are joined to the canister body. From each other in the direction that the distance between each other increases,
A pipe fixing clamp including a clamp part for fixing the pipe to at least one of the mounting parts is attached,
In the canister piping fixing structure in which the canister piping is fixed to the clamp part,
The pipe fixing clamp includes a base portion straddling the guide portion and a pair of side wall portions extending in a direction orthogonal to the base portion from the back side of the base portion and sandwiching the outer surface of the guide portion,
A clamp part that sandwiches and fixes a pipe together with a pipe holding part provided in the base part is provided on the surface side of the base part, and an opening is formed in the base part so as to face the back surface of the clamp part,
The entire pipe fixing clamp is integrally formed of a resin material ,
The pipe fixing clamp is arranged with a grid-like rib on the surface side of the base part,
A canister pipe fixing structure, wherein each of the openings is opened in a planar base portion surrounded by grid-like ribs .

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