JP5331388B2 - Resin tank built-in component fixing structure - Google Patents

Description

  The present invention relates to a resin tank built-in component fixing structure for mounting a built-in component inside a resin tank such as a fuel tank.

Built-in components such as a fuel pump that sends fuel into the resin tank, a fuel oscillation suppression mechanism that suppresses fuel oscillation, and a structural component that is provided at the opening of the resin tank It is known that is fixed.
This kind of fixing structure for the resin tank built-in component secures a predetermined mounting strength and is fixed in consideration of mounting workability.

As a fixing structure for such a resin tank built-in component, a structure in which a resin component such as a connecting member is fixed to an opening of the resin tank is known (for example, see Patent Document 1).
Japanese Patent No. 3893337

  The fixing structure of the resin tank built-in component of Patent Document 1 is composed of an opening opened in the resin tank and a connecting member attached to the opening from the inside of the tank, and the connecting member is inclined by the resin tank. Sometimes, a member is provided with a shut-off valve for preventing the stored fluid from flowing out, and has an engaging claw that engages around the opening of the resin tank.

However, in the fixing structure of the resin tank built-in component, since the connecting member is attached to the opening of the resin tank from the inside of the tank, it is necessary to provide in advance an opening for accommodating the connecting member in the tank. And after fixing a connection member in a tank, it was necessary to block the opening part provided beforehand.
For example, when a resin tank is formed of a polyethylene blow molded product, the resin tank often has a three-layer structure of polyethylene inside, a barrier layer in the middle, and polyethylene outside. Therefore, when the opening (hole) is opened in the resin tank, the intermediate barrier layer is destroyed. Therefore, even if the welding is completely performed to close the resin tank opening, the stored fluid component is discharged from the polyethylene portion. It may ooze out. In other words, even if the opening is completely blocked, a path through which the stored fluid permeates remains microscopically.
Further, in the fixing structure of the resin tank built-in component, it takes time to attach the connecting member. Since it was necessary to close the opening provided in advance, the confidentiality of the resin tank had to be fully considered.

  In the present invention, in order not to leave a path of microscopic permeation of the stored fluid, it is possible to insert the built-in component into the tank by utilizing an opening that is structurally indispensable in the resin tank. It is an object of the present invention to provide a fixing structure for a resin tank built-in component capable of improving the workability of the fixing work.

According to a first aspect of the present invention, there is provided a resin tank which is formed by resin blow molding and has a resin tank built-in component fixing structure for fixing a built-in component in a resin tank provided with an opening for storing a reservoir. A clamp is welded to the inner surface of the resin, and the built-in component is inclined with respect to the bottom of the resin tank and fixed to the clamp.

Further, the invention according to claim 1 is characterized in that the welding seating surface for welding the clamp is inclined so as to face the opening of the resin tank.

The invention according to claim 2 is characterized in that the resin tank built-in component is a wave-cancelling plate that suppresses rocking noise of the fuel stored in the resin tank.
The invention according to claim 3 is characterized in that the wave-dissipating plate is provided with a plurality of suppression blades that suppress the oscillation of the fuel, and the suppression blades are inclined with respect to the bottom of the resin tank.

In the first aspect of the present invention, a resin tank having an opening for storing the stored matter is formed by resin blow molding, and the built-in component is fixed in the resin blow molded resin tank. A clamp was welded to the inner surface of the resin tank for fixing. That is, the built-in component is tilted with respect to the bottom of the resin tank and fixed to the clamp. For example, the reliability of the resin tank is higher than that of a structure in which a clamp or the like is welded to the resin tank.
In other words, the clamp is welded to the inner surface of the resin tank, and the built-in parts are fixed to the clamp, so that the workability of fixing the built-in parts can be further improved and the reliability of fixing the resin tank is improved. can do.

Furthermore, in the invention according to claim 1 , since the welding seating surface for welding the clamp is inclined so as to face the opening of the resin tank, the clamp is easily visible from the opening. For example, a welding jig formed in a straight (linear) manner can be used when welding the clamp. As a result, the workability of fixing the built-in components can be further improved.

In the invention according to claim 2 , when the resin tank built-in component is a wave vane plate that suppresses the rocking noise of the fuel stored in the resin tank, the wave vane without opening a hole or the like in the resin tank. The board can be fixed. As a result, it is possible to improve the reliability of fixing the resin tank.
In the invention which concerns on Claim 3 , the wave-dissipating plate was equipped with the some suppression blade | wing which suppresses rocking | fluctuation of a fuel, and the suppression blade | wing was made to incline with respect to the bottom of resin-made tanks.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a cross-sectional view of a fixing structure for a resin tank built-in component according to the first embodiment of the present invention, and FIG. 2 is a block diagram of the fuel oscillation suppression mechanism for the resin tank built-in component fixing structure shown in FIG. It is sectional drawing.

  The resin tank built-in component fixing structure of the first embodiment has a fuel tank 11 having an internal space for storing a stored substance (fuel), and fixed (attached) inside the fuel tank 11 to store the stored fuel. It comprises a fuel oscillation suppression mechanism 12 that suppresses oscillation.

The fuel tank 11 is a resin tank formed of resin, and is formed in a tank main body 14 that stores fuel, and an opening 15 that is formed in an upper portion of the tank main body 14 and into which the fuel oscillation suppression mechanism 12 is inserted. And the first and second recesses 17 and 18 that are formed in the tank body 14 so as to face the outside and fix and support the fuel oscillation suppression mechanism 12.
The first recess 17 is formed in the upper part of the tank body 14, and the second recess 18 is formed in the lower part of the tank body 14.

  The fuel oscillation suppression mechanism 12 is a built-in component (fixed component) that is fixed in the resin tank, and an upper piece 31 that fits into the first recess 17 and a lower piece that fits into the second recess 18. 32 and a resilient member (compression spring) 33 interposed between the upper piece 31 and the lower piece 32.

The upper piece 31 includes a cylindrical body 35 that fits in the first recess 17 and a plurality of suppression blades 36 that suppress the oscillation of the fuel.
The cylinder 35 is extended from the inner cylinder part 37 which attaches the lower piece 32 so that sliding (sliding) is possible, the outer cylinder part 38 which latches the some suppression blade | wing 36, and the bottom of this outer cylinder part 38, The first protrusion 39 is fitted into the first recess 17.
The outer cylinder portion 38 includes a plurality of attachment portions 41 for attaching the plurality of suppression blades 36.

  The lower piece 32 includes a slide portion 44 that slides (slides) on the inner cylinder portion 37, a flange portion 45 that sandwiches the elastic member 33 between the opening 42 of the cylinder body 35, and extends downward from the flange portion 45. And a second protrusion 46 that fits into the second recess 18.

3A to 3C are explanatory views showing an assembling procedure of the fixing structure of the resin tank built-in component shown in FIG.
In (a), a fuel tank 11 and a fuel fluctuation suppressing mechanism 12 are prepared. The fuel oscillation suppression mechanism 12 is inserted into the fuel tank 11 from the opening 15 of the fuel tank 11 as indicated by an arrow a1.

In (b), the fuel oscillation suppression mechanism 12 is manually contracted as indicated by arrows a2 and a3, and the contracted fuel oscillation suppression mechanism 12 is moved toward the first and second recesses 17 and 18 as indicated by arrow a4. .
In (c), the first protrusion 39 of the upper piece 31 faces the first recess 17 of the fuel tank 11, and the second protrusion 46 of the lower piece 32 faces the second recess 18 of the fuel tank 11. The first protrusion 39 is fitted into the first recess 17 and the second protrusion 46 is fitted into the second recess 18 by separating the fuel oscillation suppression mechanism 12 from the A fuel oscillation suppression mechanism 12 is fixed to the tank 11 (can be attached).

  As shown in FIG. 1, in the resin tank built-in component fixing structure of the first embodiment, a resin tank (fuel tank) 11 having an opening 15 for storing a reservoir (fuel) is used for resin blow molding. A built-in component (fuel oscillation suppression mechanism) 12 is fixed in the resin-made tank 11 formed by resin blow molding. At the time of resin blow molding, concave portions 17 and 18 formed outwardly are provided on the inner surface of the resin tank 11, and the built-in component 12 is inserted from the opening 15 for storing the stored material, and resin blow molding is performed. The built-in component 12 is fixed to the recesses 17 and 18. For example, since resin blow molding has a degree of freedom in shape, the fixed shapes (concave portions) 17 and 18 are formed by effectively utilizing the properties.

  That is, since the built-in component 12 is inserted from the opening 15 formed by resin blow molding and the built-in component 12 is fixed to the recesses 17 and 18, when the built-in component 12 is inserted into the tank 11, a separate opening is provided in advance. There is no need to provide. Thereby, since it is not necessary to block the opening part separately, the reliability of the resin tank 11 can be improved. Further, since the built-in component 12 is inserted from the opening 15 formed by resin blow molding and the built-in component 12 is fixed to the recesses 17 and 18, the workability of the work of fixing the built-in component 12 can be improved. it can.

Furthermore, since the concave portions 17 and 18 formed outward are provided on the inner surface of the resin tank 11 during the resin blow molding, no separate fixing portion is required to fix the built-in component 12. Therefore, the cost of the resin tank 11 can be reduced.
Further, when the built-in component 12 is a wave canceling plate (fuel swing suppression mechanism) that suppresses the rocking noise of the fuel stored in the tank 11, the wave canceling plate is fixed without opening a hole or the like in the tank 11. can do. As a result, the fixing reliability of the tank 11 can be improved.

FIG. 4 is a sectional view of a fixing structure for a resin tank built-in component according to a second embodiment of the present invention.
The fixing structure of the resin tank built-in component of the second embodiment includes a fuel tank 51 and a fuel fluctuation suppressing mechanism 52.

The fuel tank 51 is a resin tank formed of resin, and is provided inside the tank main body 54, the opening 55, the concave portion 57 that fixes and supports the fuel oscillation suppression mechanism 52, and the tank main body 54 ( And a clamp (mounting base) 58 that fixes and supports the fuel oscillation suppression mechanism 52.

  The concave portion 57 is formed in the upper portion of the tank main body 54, and the clamp 58 is provided in the lower portion of the tank main body 54 and is fixed to the lower portion, and the base portion 61 is formed in the base portion 61 and supports the fuel fluctuation suppressing mechanism 52. And a support portion 62.

The fuel swing suppression mechanism 52 has substantially the same configuration as the fuel swing suppression mechanism 12 shown in FIG. 2 except for a structure that is fixed (attached) to the fuel tank 51, and includes an upper piece 71, a lower piece 72, It consists of a resilient member (compression spring) 73.
The upper piece 71 includes a cylindrical body 75 and a plurality of suppression blades 76.
The cylindrical body 75 includes an inner cylindrical portion 77, an outer cylindrical portion 78, and a protruding portion 79 that extends from the bottom of the outer cylindrical portion 78 and fits into the concave portion 57. The outer cylinder part 78 includes a plurality of attachment parts 81 for attaching a plurality of suppression blades 76.

  The lower piece 72 includes a slide portion 84, a flange portion 85, and a hook portion (engagement portion) 86 that extends downward from the flange portion 85 and engages with the support portion of the fuel tank 51.

In the resin tank built-in component fixing structure of the second embodiment, a resin tank (fuel tank) 51 having an opening 55 for storing a storage (fuel) is formed by resin blow molding, and this resin blow molding is performed. A built-in component (fuel fluctuation suppression mechanism) 52 is fixed in the resin tank 51. A clamp 58 was welded to the inner surface of the resin tank 51 for fixing. For this reason, for example, the reliability of the resin tank 51 is higher than the structure in which the clamp 58 and the like are welded to the resin tank 51.
That is, since the clamp 58 is welded to the inner surface of the resin tank 51 and the built-in component 52 is fixed to the clamp 58, the workability of fixing the built-in component 52 can be further improved and the resin tank 51 can be fixed. Reliability can be improved.

FIG. 5 is a sectional view of a fixing structure for a resin tank built-in component according to a third embodiment of the present invention.
The fixing structure of the resin tank built-in component according to the third embodiment includes a fuel tank 91 and a fuel fluctuation suppressing mechanism 92.
The fuel tank 91 is a resin tank formed of resin, and is provided inside the tank main body 94, the opening 95, the concave portion 97, and the tank main body 94, and is inclined so as to face the opening. A welding seat surface (inclined portion) 96 and a clamp (mounting base) 98 that is attached to the welding seat surface 96 and fixes and supports the fuel oscillation suppression mechanism 92.

The recess 97 is formed in the upper part of the tank main body 94, and the welding seat surface 96 is provided in the lower part of the tank main body 94.
The clamp 98 includes a base portion 101 and a support portion 102. The clamp is the same component as the clamp of the second embodiment.

The fuel swing suppression mechanism 92 has substantially the same configuration as the fuel swing suppression mechanism 52 shown in FIG. 4, and includes an upper piece 111, a lower piece 112, and a resilient member (compression spring) 113.
The upper piece 111 includes a cylindrical body 115 and a plurality of suppression blades 116.

The cylinder 115 includes an inner cylinder part 117, an outer cylinder part 118, and a projection part 119. The outer cylinder portion 118 includes a plurality of attachment portions 121 for attaching a plurality of suppression blades 116.
The lower piece 112 includes a slide portion 124, a flange portion 125, and a hook portion (engagement portion) 126 that is formed below the flange portion 125 and fits with the clamp 98 of the fuel tank 91.

  In the fixing structure of the resin tank built-in component of the third embodiment, the welding seat surface 96 to which the clamp 98 is welded is inclined so as to face the opening 95 of the resin tank 91. Becomes easier to see (becomes easier to see). For example, even when the clamp 98 is welded, a welding jig formed straight (linearly) can be used. As a result, the workability of fixing the built-in component 92 can be further improved.

FIG. 6 is a sectional view of a fixing structure for a resin tank built-in component according to a fourth embodiment of the present invention.
The resin tank built-in component fixing structure according to the fourth embodiment includes a fuel tank 131 having an internal space for storing a stored substance (fuel), and a fuel fluctuation suppressing mechanism 132 for suppressing the fluctuation of the stored fuel. .

  The fuel tank 131 is a resin tank formed of resin. The fuel tank 131 is formed inwardly on a tank main body 134 and an upper portion 135 and a lower portion 136 of the tank main body 134, and fixes and supports the fuel fluctuation suppression mechanism 132. The first and second convex portions 137 and 138 are provided.

  The fuel oscillation suppression mechanism 132 is a built-in component (fixed component) fixed in the resin tank, and is fitted to the upper piece 141 fitted to the first convex portion 137 and the second convex portion 138. It consists of a lower piece 142 and a resilient member (compression spring) 143 interposed between the upper piece 141 and the lower piece 142.

  The upper piece 141 includes a cylinder body 145 that is slidably fitted to the lower piece 142, and an upper end recess 146 that is provided at the upper end of the cylinder body 145 and that is fitted to the first recess 137.

  The lower piece 142 is fitted into the cylinder main body 145 and accommodates the resilient member 143, an outer cylinder part 148 formed outside the inner cylinder part 147, the inner cylinder part 147, A lower end recess 149 formed at the lower end of the outer cylinder portion 148 and fitted into the second recess 138, and a plurality of suppression blades 151 attached to the outer cylinder portion 148 at a predetermined interval to suppress fuel oscillation. Consists of.

  In the resin tank built-in component fixing structure of the fourth embodiment, the first and second convex portions 137 and 138 for fixing and supporting the fuel oscillation suppression mechanism 132 are inwardly connected to the upper portion 135 and the lower portion 136 of the tank body 134. Therefore, there is no portion protruding outward from the tank main body 134. Therefore, the fuel tank 131 can be easily arranged on the vehicle body, and the space efficiency around the fuel tank 131 can be improved.

That is, since the resin blow molding has a degree of freedom in shape, the convex portions (fixed shapes) 137 and 138 are formed by effectively utilizing the properties.
Since the built-in component 132 is inserted from an opening (not shown) formed by resin blow molding, and the built-in component 132 is fixed to the convex portions 137 and 138, when the built-in component 132 is inserted into the tank 131, There is no need to provide a separate opening. Thereby, since it is not necessary to block the opening part separately, the reliability of the resin tank 131 can be improved. Further, since the built-in component 132 is inserted from the resin blow molded opening and the built-in component 132 is fixed to the convex portions 137 and 138, the workability of the work of fixing the built-in component 132 can be improved. it can.
Furthermore, since the convex portions 137 and 138 projecting from the inner surface of the resin tank 131 are provided at the time of resin blow molding, a separate fixing portion is not necessary for fixing the built-in component 132. Therefore, the cost of the resin tank 132 can be reduced.

FIG. 7 is a sectional view of a fixing structure for a resin tank built-in component according to a fifth embodiment of the present invention.
The resin tank built-in component fixing structure of the fifth embodiment is composed of a fuel tank 161 having an internal space for storing stored matter (fuel), and a fuel fluctuation suppressing mechanism 162 for suppressing the fluctuation of the stored fuel. .

  The fuel tank 161 is a resin tank formed of resin, and is formed inwardly on the tank main body 164 and the upper portion 165 and the lower portion 166 of the tank main body 164, and fixedly supports the fuel fluctuation suppression mechanism 162. The first and second convex portions 167 and 168 are provided.

  The fuel oscillation suppression mechanism 162 is a built-in component (fixed component) fixed in the resin tank, and is fitted to the upper piece 171 fitted to the first convex portion 167 and the second convex portion 168. The lower piece 172 includes a resilient member (compression spring) 173 interposed between the upper piece 171 and the lower piece 172.

The upper piece 171 includes a cylinder body 175 slidably fitted to the lower piece 172,
The upper end recess 176 is provided at the upper end of the tube main body 175 and fits into the first recess 167.

  The lower piece 172 is fitted into the cylinder main body 175 and accommodates the elastic member 173, an outer cylinder part 178 formed outside the inner cylinder part 177, the inner cylinder part 177, A lower end recess 179 formed at the lower end of the outer cylinder portion 178 and fitted to the second recess 168, and a porous shape (sponge) that is attached to the outer cylinder portion 178 with a predetermined interval and suppresses the fuel oscillation. ) And a skin net 182 that protects the restraining member 181 by covering the restraining member 181.

  In the resin tank built-in component fixing structure of the fifth embodiment, the first and second convex portions 167 and 168 for fixing and supporting the fuel oscillation suppression mechanism 162 are formed inwardly on the upper portion 165 and the lower portion 166 of the tank body 164. Therefore, there is no portion protruding outward from the tank body 164. Therefore, the fuel tank 161 can be easily arranged on the vehicle body, and the space efficiency around the fuel tank 161 can be improved.

FIG. 8 is a sectional view of a fixing structure for a resin tank built-in component according to a sixth embodiment of the present invention.
The resin tank built-in component fixing structure according to the sixth embodiment includes a fuel tank 191 having an internal space for storing a stored substance (fuel), and a fuel fluctuation suppressing mechanism 192 for suppressing the fluctuation of the stored fuel. .

  The fuel tank 191 is a resin tank formed of resin. The fuel tank 191 is formed inwardly on the tank main body 194 and the upper portion 195 and the lower portion 196 of the tank main body 194, and fixedly supports the fuel fluctuation suppression mechanism 192. 1st convex part 197,197 and 2nd convex part 198,198 are provided.

The fuel oscillation suppression mechanism 192 is a built-in component (fixed component) that is fixed in the resin tank. The left prop 201 that fits into the first and second convex portions 197 and 198, and the other The right strut 202 fitted to the first and second convex portions 197 and 198, the upper and lower string members 203 and 204 passed to the struts 201 and 202, and the upper string member 203 are locked. It consists of a plurality of restraining members 205 that suppress fuel oscillation noise and a plurality of suppression members 206 that are locked to the lower string member 204 and suppress fuel oscillation noise.
The suppressing members 205 and 206 are preferably porous members such as sponges.

  The left column 201 has an upper piece 211 fitted to the first convex portion 197, a lower piece 212 fitted to the second convex portion 198, and interposed between the upper piece 211 and the lower piece 212. And a resilient member (compression spring) 213.

  The upper piece 211 includes a cylinder body 215 that is slidably fitted to the lower piece 212, and an upper end recess 216 that is provided at the upper end of the cylinder body 215 and is fitted to the first recess 197.

The lower piece 212 is fitted into the cylinder main body 215 and accommodates the elastic member 213, an outer cylinder part 218 formed outside the inner cylinder part 217, the inner cylinder part 217, A lower end recess 219 that is formed at the lower end of the outer cylinder 218 and fits into the second recess 198, and a locking groove 221 that is provided in the outer cylinder 218 and that locks the upper and lower string members 203, 204. 222.
The right column 202 is the same member as the left column 201.

  In the fixing structure of the resin tank built-in component according to the sixth embodiment, the first protrusions 197 and 197 and the second protrusions 198 and 198 that fix and support the fuel swing suppression mechanism 192 are formed on the upper portion 195 of the tank body 194. And since it was formed inward in the lower part 196, there is no portion protruding outward from the tank body 194. Therefore, the fuel tank 191 can be easily arranged on the vehicle body, and the space efficiency around the fuel tank 191 can be improved.

  In addition, the resin tank built-in component fixing structure according to the present invention is the fuel oscillation suppression mechanism 12 fixed in the fuel tank 11 as shown in FIG. 1, but is not limited to this. The tank 11 may be a resin tank, and the fuel swing suppression mechanism 12 may be a built-in component built in the resin tank.

  In the fixing structure of the resin tank built-in parts of the fourth to sixth embodiments, the upper end recesses 146, 176, 216 at the upper ends of the upper pieces 141, 171, 211 are formed, but the upper end recesses keep the cylinder body cut off. It may be the end of a cylinder.

  The resin tank built-in component fixing structure according to the present invention is suitable for use in a fuel tank of a passenger car such as a sedan or a wagon.

It is sectional drawing of the fixation structure of resin-made tank built-in components of 1st Example which concerns on this invention. It is sectional drawing of the fuel rocking | fluctuation suppression mechanism of the fixed structure of resin tank built-in components shown by FIG. It is explanatory drawing which shows the assembly procedure of the fixation structure of the resin tank built-in components shown by FIG. It is sectional drawing of the fixation structure of resin-made tank built-in components of 2nd Example which concerns on this invention. It is sectional drawing of the fixation structure of resin-made tank built-in components of 3rd Example which concerns on this invention. It is sectional drawing of the fixation structure of resin-made tank built-in parts of 4th Example based on this invention. It is sectional drawing of the fixation structure of resin-made tank built-in parts of 5th Example which concerns on this invention. It is sectional drawing of the fixing structure of resin-made tank built-in components of 6th Example which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Resin tank (fuel tank), 12 ... Built-in component (fuel oscillation suppression mechanism), 15 ... Opening part, 17, 18 ... Recessed part, 51 ... Resin tank (fuel tank), 52 ... Built-in component (fuel shaking) (Motion suppression mechanism), 55 ... opening, 58 ... clamp, 91 ... resin tank (fuel tank), 92 ... built-in component (fuel oscillation suppression mechanism), 95 ... opening, 96 ... welding seat surface, 98 ... clamp .

Claims (3)

In the fixing structure of the resin tank built-in component, which is formed by resin blow molding and fixes the built-in component in the resin tank having an opening for storing the stored matter,
A clamp is welded to the inner surface of the resin tank, and the built-in component is inclined with respect to the bottom of the resin tank and fixed to the clamp .
A fixing structure for a resin tank built-in component , wherein a welding seat surface for welding the clamp is inclined so as to face the opening of the resin tank . 2. The resin tank built-in component fixing structure according to claim 1 , wherein the resin tank built-in component is a wave-cancelling plate that suppresses a rocking noise of fuel stored in the resin tank. 3. The resin tank built-in according to claim 2 , wherein the wave-dissipating plate includes a plurality of suppression blades that suppress fuel oscillation, and the suppression blades are inclined with respect to a bottom of the resin tank. Parts fixing structure.

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