JP2005083249A - Mounting structure of component with built-in tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure of a component with a built-in tank in which a decrease in engagement force can be suppressed. <P>SOLUTION: The mounting structure of the component with the built-in tank includes a part 91a to be engaged projected from an inner surface of a fuel tank 9, and an engaging part 201a disposed in the component 1 with the built-in tank and engaged with the part 91a to be engaged. The component 1 with the built-in tank has a container 20a for containing the part 91a to be engaged in such a manner that the engaging part 201a is disposed in the container 20a. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a mounting structure for a tank built-in component that is mounted inside a fuel tank such as a valve.

  For example, a tank built-in component such as a valve is conventionally attached to the inner surface of a fuel tank via a connecting member such as a bracket (for example, Patent Document 1). However, in this case, the number of parts increases as the connecting member is arranged.

Therefore, Patent Document 2 introduces a valve directly attached to the fuel tank by pressure welding. FIG. 17 shows a vertical cross-sectional view of the valve described in the document. As shown in the figure, a protrusion 102 protrudes from the upper wall 101 of the fuel tank 100 toward the inside of the tank. On the other hand, a cylindrical rib 105 projects from the upper wall 104 of the valve 103. From the inner peripheral surface of the upper end of the rib 105, a press-contact claw 106 is provided so as to protrude toward the inner peripheral side over the entire periphery. The protrusion 102 is relatively inserted on the inner peripheral side of the pressure contact claw 106. Here, the inner diameter of the press contact claw 106 before insertion is set to be smaller than the outer diameter of the protrusion 102. For this reason, the pressure contact claw 106 is in pressure contact with the outer peripheral surface of the protrusion 102 after insertion. That is, the valve 103 is attached to the fuel tank 100 by the protrusion 102 being relatively press-fitted into the inner peripheral side of the pressure contact claw 106.
JP 2001-041124 A Special Table 2003-517142

  However, according to Patent Document 2, there is a possibility that distortion in the diameter expansion direction may remain on the rib 105 after the valve 103 is attached. For this reason, there was a possibility that the pressure contact force with respect to the outer peripheral surface of the protrusion 102 of the pressure contact claw 106 may be reduced.

  That is, when the valve 103 is attached to the fuel tank 100, the rib 105 is deformed to expand in diameter as the protrusion 102 is press-fitted. At this time, a pressure contact force from the rib 105 is applied to the protrusion 102 in the diameter reducing direction. This pressure contact force acts on the entire circumference. For this reason, the pressure contact force (for example, F1 in FIG. 17) applied to the protrusion 102 from an arbitrary direction is canceled by a reverse direction pressure force (for example, F2 in FIG. 17) acting on the pressure contact force from a diagonal position. Will be. Accordingly, the press contact force is canceled over the entire circumference, and the protrusion 102 hardly deforms during press-fitting. That is, when the valve 103 is attached to the fuel tank 100, only the rib 105 is deformed. Therefore, in order to secure a desired pressure contact force, the rib 105 needs to be deformed by a considerable amount at the time of attachment. At this time, if the rib 105 is expanded and deformed beyond the elastic limit, strain in the diameter increasing direction remains on the rib 105. The pressure contact force on the outer peripheral surface of the protrusion 102 of the pressure contact claw 106 is reduced by the amount of this distortion.

  Further, according to Patent Document 2, when a radial swinging force (for example, F3 in FIG. 17) is applied to the valve 103 with respect to the fuel tank 100, the swinging force is received by the outer peripheral surface of the protrusion 102 and the press contact claw 106. It was only the pressure contact part. That is, the oscillating force is concentrated on only the pressure contact portion. If strain remains on the outer peripheral surface of the pressure contact claw 106 or the protrusion 102 due to this swinging force, the pressure contact force may be reduced. Therefore, not only when the valve 103 is attached, but also after the valve 103 is attached, the pressure contact force may be reduced.

  The tank built-in component mounting structure of the present invention has been completed in view of the above problems. Therefore, an object of the present invention is to provide a tank built-in component mounting structure that can suppress a decrease in engagement force.

  (1) In order to solve the above-described problem, the tank built-in component mounting structure according to the present invention is disposed on the engaged portion projecting from the inner surface of the fuel tank and the tank-embedded component, and is engaged with the engaged portion. A tank built-in component mounting structure, wherein the tank built-in component includes a housing portion for housing the engaged portion, and the engaging portion is disposed in the housing portion. It is characterized by being.

  That is, the tank built-in component mounting structure of the present invention (hereinafter abbreviated as “mounting structure” as appropriate) is obtained by engaging the engaged portion on the fuel tank side and the engaging portion on the tank built-in component side, A tank built-in part is attached to the fuel tank. An accommodating portion is disposed in the tank built-in component. The engaging part is arranged in the accommodating part. For this reason, the engaging part and the engaged part are engaged in the accommodating part.

  According to the present invention, the engaging portion formed by the engaging portion and the engaged portion is accommodated in the accommodating portion. That is, the engaging part is reinforced by the accommodating part. Therefore, even if a swinging force is applied to the tank built-in component with respect to the fuel tank, the swinging force can be distributed and received not only by the engaging portion but also by the housing portion. For this reason, distortion hardly remains in the engaging portion and the engaged portion. Therefore, a decrease in engagement force can be suppressed.

  Further, when the fuel-swelling property of the tank built-in component, that is, the accommodating portion is smaller than that of the fuel tank, that is, the engaged portion, the engaged portion expands in the accommodating portion after attachment (after fuel injection). Therefore, the engaged portion comes into pressure contact with the engaging portion disposed in the accommodating portion. As described above, according to the mounting structure of the present invention, it is possible to suppress a decrease in the engaging force at the time of mounting and to increase the engaging force after the mounting.

  (2) Preferably, when both the engaged portion and the engaging portion are elastically deformed, the engaging portion is engaged with the engaged portion, and the engaged portion is accommodated in the accommodating portion. It is better to have a configuration in which the tank built-in component is attached to the fuel tank in such a state.

  According to this configuration, both the engaged portion and the engaging portion are elastically deformed at the time of attachment. For this reason, it is difficult for distortion to remain in the engaged portion and the engaging portion after attachment. Therefore, a decrease in engagement force can be suppressed.

  (3) Preferably, the engaged portion is an engaged rib in which an engaged hole is formed, and the engaging portion is an engaging claw that engages with the engaged hole. Is better. The engaged rib has a simpler surface configuration than the engaging claw. For this reason, according to this structure, it becomes easy to form a to-be-engaged rib integrally with a fuel tank, for example by shaping | molding.

  (4) Preferably, it is better to have a structure in which a thinning portion that facilitates accommodation of the engaged portion is arranged in the accommodation portion. According to this configuration, the storage space of the storage portion is expanded by the space of the meat removal portion. For this reason, it becomes easy for the engaged portion to enter the accommodating portion.

  (5) Preferably, the insertion piece further includes an insertion piece to be inserted into the accommodation portion, and in the first stage, the insertion piece is accommodated with the accommodation portion remaining in the accommodation portion. And in the second stage, the tank built-in component is inserted into the fuel tank in a state where the engaging portion is engaged with the engaged portion, and the engaged portion is accommodated in the accommodating portion. In the third stage, the inserted piece after temporary insertion is further inserted into the housing part, and the surplus margin of the housing part is eliminated, so that the tank built-in component is permanently attached to the fuel tank. It is better to have a configuration.

  That is, this structure attaches a tank built-in component to a fuel tank in steps. That is, the tank built-in component is temporarily attached first and then permanently attached.

  In the first stage, the insertion piece is inserted into the accommodating portion while securing the accommodation allowance of the engaging portion. That is, the insertion piece is temporarily inserted. In the second stage, the engaging portion is engaged with the engaged portion using the accommodation allowance secured in the first stage. Further, the engaged portion is accommodated in the accommodating portion. Since the storage allowance is secured in advance, the engaging portion can be engaged with the engaged portion relatively easily at this stage. Due to the engagement, the tank built-in component is temporarily attached to the fuel tank. In the third stage, the insertion piece is further inserted into the housing portion until there is no surplus margin present in the housing portion after housing the engaged portion. That is, the insertion piece is fully inserted. When this is inserted, there is no surplus in the housing part. That is, there is no play allowance for the engaged portion in the accommodating portion. For this reason, rattling between the engaging portion and the engaged portion is reduced. Further, the engaging force between the engaging portion and the engaged portion increases. Thus, the tank built-in component is permanently attached to the fuel tank.

  In this way, in this configuration, the tank built-in component is temporarily attached first and then permanently attached. After the temporary attachment (second stage), the tank built-in component is temporarily fixed to the fuel tank by its own engagement force. For this reason, for example, even when the tank built-in component is suspended in the fuel tank, it is not necessary for the operator to support the tank built-in component after temporary mounting. Therefore, this configuration is suitable for improving the workability when used for a relatively large volume built-in tank component or a tank built-in component arranged in a suspended state.

  (6) Moreover, in order to solve the said subject, the attachment structure of the tank built-in component of this invention is arrange | positioned at the to-be-engaged part protruded from the fuel tank inner surface, and the tank built-in component, A tank built-in component mounting structure including an engaging portion engaged from the outer peripheral side, and the engaging portion is deformed by elastic deformation of both the engaged portion and the engaging portion. The tank built-in component is attached to the fuel tank by engaging with an engaging portion.

  At the time of attachment, both the engaged portion and the engaging portion are elastically deformed. For this reason, after attachment, distortion hardly remains in the engaged part or the engaging part. Therefore, according to the mounting structure of the present invention, it is possible to suppress a decrease in engagement force during mounting.

  Further, when the fuel swellability of the tank built-in component is smaller than that of the fuel tank, the tank built-in component, that is, the engaging portion is less likely to expand by the fuel. On the other hand, the fuel tank, that is, the engaged portion is easily expanded by the fuel. In view of this point, in the mounting structure of the present invention, the engaged portion is disposed on the inner peripheral side, and the engaging portion is disposed on the outer peripheral side. For this reason, in the fuel tank after attachment (after fuel injection), the engaged portion regulates the engaged portion that expands from the inner peripheral side from the outer peripheral side. Therefore, the engaged portion is pressed against the engaging portion in the radial direction. As described above, according to the mounting structure of the present invention, it is possible to suppress a decrease in the engaging force at the time of mounting and to increase the engaging force after the mounting.

  (7) Preferably, in the configuration of (6) above, the engaged portion is an engaged rib having an engaged hole, and the engaging portion is engaged with the engaged hole. It is better to have a configuration of mating engagement claws. The engaged rib has a simpler surface configuration than the engaging claw. For this reason, according to this structure, it becomes easy to form a to-be-engaged rib integrally with a fuel tank, for example by shaping | molding.

  According to the tank built-in component mounting structure of the present invention, it is possible to suppress a decrease in the engagement force between the engaging portion and the engaged portion.

(1) 1st embodiment The attachment structure of this embodiment uses the attachment structure of this invention for the fuel cutoff valve attached to a fuel tank upper wall.

  First, the structure of the fuel cutoff valve using the mounting structure of this embodiment will be described. FIG. 1 shows an exploded view of a fuel cutoff valve using the mounting structure of the present embodiment. FIG. 2 shows an external view of the fuel cutoff valve. FIG. 3 shows a vertical sectional view of the fuel cutoff valve. FIG. 4 is a cross-sectional view taken along the line II of FIG.

  The fuel shut-off valve 1 is attached to engaged ribs 91a, 91b, and 91c protruding from the lower surface of the upper wall 90 of a fuel tank 9 made of HDPE (high density polyethylene). The fuel cutoff valve 1 is included in the tank built-in component of the present invention. The fuel cutoff valve 1 mainly includes an upper case 2, a lower case 3, a bottom 4, and a float 5.

  The upper case 2 is made of POM (polyoxymethylene) and has a bottomed cylindrical shape that opens downward. From the lower end of the upper case 2, accommodating portions 20 a, 20 b, and 20 c are extended toward the diameter increasing direction. The accommodating portion 20a has a U-shaped cross section that opens upward. An engaging claw 201a having a triangular cross section is provided so as to protrude from the inner surface of the upper end of the outer peripheral wall 200a of the housing portion 20a. A pair of detent ribs 205a are provided upright from both ends in the circumferential direction of the outer peripheral wall 200a. On the other hand, a wall removal portion 203a is formed on the inner surface of the inner peripheral wall 202a of the housing portion 20a. A storage chamber 204a is defined between the outer peripheral wall 200a and the inner peripheral wall 202a. The engaged rib 91a is accommodated in the accommodating chamber 204a from above. The engaging claw 201a is engaged with an engaged hole 910a formed in the engaged rib 91a. In addition, the structure of the accommodating parts 20b and 20c is the same as that of the accommodating part 20a. Therefore, the description of the configuration of the accommodating portions 20b and 20c is omitted.

  The accommodating portions 20a, 20b, and 20c are dotted at predetermined angles on the substantially circumference. Specifically, the included angle α between the engaging claw 201a of the accommodating portion 20a and the engaging claw 201b of the accommodating portion 20b is set to 115 °. In addition, the included angle β between the engaging claw 201b of the accommodating portion 20b and the engaging claw 201c of the accommodating portion 20c is set to 130 °. In addition, the included angle γ between the engaging claw 201c of the housing portion 20c and the engaging claw 201a of the housing portion 20a is set to 115 °. The engaged rib 91a and the engaging claw 201a, the engaged rib 91b and the engaging claw 201b, and the engaged rib 91c and the engaging claw 201c face each other in the vertical direction. As described above, the engaging claw 201a is engaged with the engaged hole 910a of the engaged rib 91a, the engaging claw 201b is engaged with the engaged hole 910b of the engaged rib 91b, and the engaging claw 201c is engaged. The upper case 2, that is, the fuel cutoff valve 1 is attached to the fuel tank 9 by engaging with the engaged holes 910 c of the joint ribs 91 c.

  The lower case 3 is made of POM and has a bottomed cylindrical shape that opens downward. The lower case 3 is welded to the opening edge of the upper case 2. A float chamber 31 is defined inside the lower case 3. In addition, a case communication hole 30 is formed in substantially the center of the upper bottom wall of the lower case 3. The float chamber 31 communicates with the inside of the upper case 2 through the case communication hole 30. Further, a cylindrical relief cylinder portion 32 passes through the upper bottom wall of the lower case 3. The float chamber 31 and the inside of the upper case 2 communicate with each other via the relief cylinder portion 32. A diameter-reduced valve seat 320 is formed at the lower end of the relief cylinder portion 32. A ball valve body 321 is disposed in the reduced diameter valve seat 320. A relief spring 322 is interposed between the ball valve body 321 and the upper bottom wall of the upper case 2. The ball valve body 321 is pressed against the reduced diameter valve seat 320 by the urging force of the relief spring 322. From the outer peripheral surface of the lower case 3 side peripheral wall, a cylindrical port portion 33 protrudes in the direction of diameter expansion slightly downward. A hose (not shown) communicating with the canister is fitted to the outer peripheral end of the port portion 33. On the other hand, the inner peripheral end of the port portion 33 communicates with the inside of the upper case 2. That is, the inside of the upper case 2 and the canister communicate with each other through the port portion 33. Further, an engaged recess 34 is formed in the outer peripheral surface of the lower case 3 side peripheral wall. A total of four engaged recesses 34 are arranged every 90 ° in the circumferential direction.

  The bottom 4 is made of POM and has a bottomed cylindrical shape that opens upward. Case engaging claws 40 are formed on the side peripheral wall of the bottom 4. A total of four case engaging claws 40 are arranged every 90 ° in the circumferential direction. The case 4 is engaged with the lower edge of the engaged recess 34 so that the bottom 4 is attached to the lower end of the lower case 3. The float chamber 31 is closed. A tank communication hole 41 is formed in the bottom wall of the bottom 4. The inside of the fuel tank 9 and the float chamber 31 communicate with each other through the tank communication hole 41. Further, a cylindrical protrusion 42 projects from the bottom wall upper surface of the bottom 4.

  The float 5 is made of POM and has a cylindrical shape with a protruding valve body 50 protruding from the upper surface. The float 5 is accommodated in the float chamber 31. The protruding valve body 50 faces the case communication hole 30 in the vertical direction. A recess 51 is provided in the lower surface of the float 5. The protrusion 42 is inserted into the recess 51. A float spring 420 is mounted on the protrusion 42. The float spring 420 urges the float 5 upward.

  Next, the movement of the fuel cutoff valve using the mounting structure of this embodiment will be described. At the time of refueling, the fuel vapor is guided from the inside of the fuel tank 9 to the canister via the tank communication hole 41, the float chamber 31, the case communication hole 30, the upper case 2, the port 33, and the hose. When the fuel reaches a predetermined liquid level, the fuel flows into the float chamber 31 from the inside of the fuel tank 9 through the tank communication hole 41. The float 5 rises due to the buoyancy caused by the fuel that flows in and the biasing force of the float spring 420. Then, the protruding valve body 50 of the float 5 closes the case communication hole 30. In this way, the outflow of fuel to the canister is prevented. When the pressure inside the fuel tank 9 becomes excessively high, the ball valve body 321 is lifted away from the reduced diameter valve seat 320 against the urging force of the relief spring 322. Then, the pressure inside the fuel tank 9 is adjusted.

  Next, a method for mounting the fuel cutoff valve using the mounting structure of this embodiment will be described. First, the upper case 2 and the lower case 3 are welded. Subsequently, the bottom 4 is attached to the lower case 3 by engaging the case engaging claws 40 with the lower edge of the engaged recess 34. Thus, the fuel cutoff valve 1 is completed.

  Then, the engagement claws 201a, 201b, 201c and the engaged ribs 91a, 91b, 91c are aligned. Then, the fuel cutoff valve 1 is brought close to the upper wall 90 of the fuel tank 9. FIG. 5 is a perspective view showing the state of the accommodating portion and the engaged rib at the time of attachment. FIG. 6 is a sectional view showing the state of the accommodating portion and the engaged rib at the time of attachment. As shown in these drawings, when the engaged rib 91a and the engaging claw 201a come into contact with each other, the engaged rib 91a is elastically curved toward the inner peripheral side. On the other hand, the engaging claw 201a and the outer peripheral wall 200a are elastically curved toward the outer peripheral side. Here, a wall removal portion 203a is formed on the inner peripheral wall 202a. For this reason, the engagement claw 201a and the outer peripheral wall 200a are elastically curved to the outer peripheral side relatively easily by the contact with the engaged rib 91a. In addition, the storage chamber 204a is largely opened by the thickness removal portion 203a. For this reason, the engaged rib 91a tends to enter the accommodation chamber 204a. FIG. 7 is a perspective view showing the state of the accommodating portion and the engaged rib after attachment. When the engagement claw 201a and the engaged rib 91a slide by a predetermined amount, the engagement claw 201a engages with the engagement hole 910a by elastic restoring force. Further, the engaged rib 91a is accommodated in the accommodating chamber 204a by being surrounded by the outer peripheral wall 200a, the inner peripheral wall 202a, and the pair of detent ribs 205a. The state of the accommodating portions 20b and 20c and the engaged ribs 91b and 91c is the same as that of the accommodating portion 20a and the engaged rib 91a. Therefore, explanation of these will be omitted. As described above, the engaging claws 201a, 201b, and 201c engage with the engaging holes 910a, 910b, and 910c, respectively, and the engaged ribs 91a, 91b, and 91c are accommodated in the accommodating portions 20a, 20b, and 20c, respectively. Thus, the fuel cutoff valve 1 is attached to the fuel tank 9.

  Next, the effect of the mounting structure of this embodiment will be described. According to the mounting structure of the present embodiment, the engaging portions formed by the engaging claws 201a, 201b, 201c and the engaged ribs 91a, 91b, 91c are accommodated in the accommodating portions 20a, 20b, 20c, respectively. Yes. That is, the engaging portion is reinforced by the accommodating portions 20a, 20b, and 20c. For this reason, even if a swinging force is applied to the fuel shut-off valve 1 with respect to the fuel tank 9, the swinging force can be distributed and received not only by the engaging portion but also by the housing portions 20a, 20b, and 20c. Therefore, distortion hardly remains in the engaging claws 201a, 201b, 201c and the engaged ribs 91a, 91b, 91c. Therefore, a decrease in engagement force can be suppressed.

  Further, according to the mounting structure of the present embodiment, both the engaged ribs 91a, 91b, 91c and the engaging claws 201a, 201b, 201c are elastically deformed at the time of mounting. For this reason, it is difficult for distortion to remain in the engaged ribs 91a, 91b, 91c and the engaging claws 201a, 201b, 201c after attachment. Also in this point, it is possible to suppress a decrease in engagement force.

  Further, according to the mounting structure of the present embodiment, the engaged ribs 91a, 91b, 91c are projected from the inner surface of the upper wall 90 of the fuel tank 9 as the engaged portion. The engaged ribs 91a, 91b, and 91c have a rectangular plate shape with a simple surface configuration. For this reason, the engaged ribs 91a, 91b, 91c can be formed integrally with the fuel tank 9.

  Further, according to the mounting structure of the present embodiment, as shown in FIG. 4, the included angle α between the engaging claw 201a and the engaging claw 201b is set to 115 °. In addition, the included angle β between the engaging claw 201b and the engaging claw 201c is set to 130 °. In addition, the included angle γ between the engaging claw 201c and the engaging claw 201a is set to 115 °. That is, the three included angles α, β, and γ are unequal. For this reason, for example, even if the engaging claw 201c is to be engaged with the engaged rib 91a, that is, the fuel cutoff valve 1 is rotated 115 degrees clockwise in FIG. However, since the relative position of the engaging claw 201b and the engaged rib 91c is deviated by 15 °, the fuel cutoff valve 1 cannot be attached. That is, the fuel cutoff valve only when the engaging claw 201a and the engaged rib 91a, the engaging claw 201b and the engaged rib 91b, and the engaging claw 201c and the engaged rib 91c face each other in the vertical direction. 1 can be attached to the fuel tank 9. For this reason, according to the mounting structure of the present embodiment, positioning of the fuel injection valve 1 is easy. Therefore, there is no possibility that the angle at which the port portion 33 is taken out is mistaken in the attaching operation. In FIG. 4, the rib width of the engaged rib 91a is made larger than the rib widths of the engaged ribs 91b and 91c, and the width of the accommodating portion 20a (outer peripheral wall 200a) is accordingly increased. Even if it is increased in accordance with the rib width, incorrect assembly can be prevented.

  Moreover, according to the attachment structure of this embodiment, the thinning parts 203a, 203b, and 203c are arrange | positioned at the accommodating parts 20a, 20b, and 20c, respectively. For this reason, at the time of attachment, the engaging claw 201a and the outer peripheral wall 200a are elastically curved toward the outer peripheral side relatively easily. Further, at the time of attachment, the storage chamber 204a is greatly opened by the amount corresponding to the thickness removing portion 203a. For this reason, the engaged rib 91a tends to enter the accommodation chamber 204a. In addition, the engagement ribs 91a, 91b, 91c made of HDPE and relatively soft are less likely to be damaged during storage.

  Further, according to the mounting structure of the present embodiment, the upper case 2 (engaging claws 201a, 201b, 201c) is formed of POM. On the other hand, the fuel tank 9 (engaged ribs 91a, 91b, 91c) is formed of HDPE. For this reason, the upper case 2 is less fuel swellable than the fuel tank 9. In view of this point, in the mounting structure of the present embodiment, the engaged ribs 91a, 91b, and 91c are arranged on the inner peripheral side, and the engaging claws 201a, 201b, and 201c are arranged on the outer peripheral side, respectively. For this reason, in the fuel tank 9 after attachment (after fuel injection), the engaged ribs 91a, 91b, 91c that expand and expand from the inner peripheral side, and the engaging claws 201a, 201b, 201c from the outer peripheral side, respectively regulate. Therefore, the engaged ribs 91a, 91b, and 91c are in pressure contact with the engaging claws 201a, 201b, and 201c in the radial direction, respectively. Thus, according to the attachment structure of the present embodiment, the engagement force can be increased after attachment (after fuel injection).

  Further, according to the mounting structure of the present embodiment, after the mounting (after fuel injection), the engaged rib portions 91a, 91b, and 91c expand so as to fill the interiors of the storage chambers 204a, 204b, and 204c. Also in this point, the engagement force after attachment can be raised.

  Further, according to the mounting structure of the present embodiment, after the engaging claw 201a and the engaged rib 91a slide by a predetermined amount at the time of mounting, the engaging claw 201a engages with the engaging hole 910a by elastic restoring force. To do. The operator can confirm the completion of attachment by the click feeling at the moment of engagement. Therefore, the mounting accuracy is increased.

  Further, according to the mounting structure of the present embodiment, as shown in FIG. 4, a pair of detent ribs 205a, 205b, and 205c are disposed in the accommodating portions 20a, 20b, and 20c, respectively. For this reason, the shakiness of the circumferential direction of the fuel cutoff valve 1 after attachment can be suppressed.

(2) Second embodiment The mounting structure of the present embodiment uses the mounting structure of the present invention for a valve module mounted on the upper wall of a fuel tank.

  In FIG. 8, the external view of the valve module using the attachment structure of this embodiment is shown. FIG. 9 shows an enlarged perspective view of the engaging portion of the mounting structure of the present embodiment. In FIG. 10, the expanded sectional view of the engaging part of the attachment structure of this embodiment is shown. FIG. 11 shows an exploded perspective view of the engaging portion of the mounting structure of the present embodiment. FIG. 12 shows an exploded cross-sectional view of the engaging portion of the mounting structure of this embodiment.

  First, the structure of the mounting structure of this embodiment is demonstrated. A plurality of valves (not shown) attached to the inner surface of the upper wall of the fuel tank are integrally mounted on the valve module 7. The valve module 7 is made of POM. The valve module 7 is included in the tank built-in component of the present invention. A U-shaped housing portion 20 is formed on the side wall of the valve module 7 when viewed from above. A total of eleven accommodating portions 20 are provided at predetermined intervals along the outer edge of the valve module 7. From the inner surface of the outer peripheral wall 200 of the housing part 20, an engaging claw 201 having a triangular cross section is projected. A storage chamber 204 is defined between the outer peripheral wall 200 and the side wall of the valve module 7. From the outer surface of the lower end of the outer peripheral wall 200, an insertion piece engaging claw 206 having a triangular cross section is projected.

  The insertion piece 6 is made of POM and has a U-shaped cross section. The insertion piece 6 is engaged with the accommodating portion 20 in a state where an inner wall 63 and a rotation stopper rib 205 described later are inserted into the accommodating chamber 204 from below. The outer wall 60 of the insertion piece 6 is disposed outside the outer peripheral wall 200 of the housing portion 20. A temporary engagement hole 61 and a main engagement hole 62 are formed in the outer wall 60 side by side in the vertical direction. The insertion piece engaging claw 206 is engaged with the main engaging hole 62. A tapered surface 64 is formed at the upper end of the inner wall 63 of the insertion piece 6 so as to expand outward in the U shape. In addition, a pair of detent ribs 205 project from both ends of the upper end of the inner wall 63.

  The engaged rib 91 protrudes from the inner surface of the upper wall (not shown) of the HDPE fuel tank. The engaged rib 91 has a rectangular plate shape. An engaged hole 910 is formed in the engaged rib 91. A total of eleven engagement ribs 91 are provided at positions facing the housing portion 20 in the vertical direction. The engaged rib 91 is accommodated in the accommodating chamber 204 of the accommodating portion 20. Specifically, the engaged rib 91 is accommodated between the inner wall 63 of the insertion piece 6 and the outer peripheral wall 200 of the accommodating portion 20. Engaging holes 910 of each engaged rib 91 are engaged with engaging claws 201 of the accommodating portions 20 facing each other. By this engagement, the valve module 7 is attached to the upper wall of the fuel tank.

  Next, the attachment method of the valve module using the attachment structure of this embodiment is demonstrated. In the first stage, as shown by white arrows in FIGS. 11 and 12, the insertion piece 6 is temporarily inserted into the housing portion 20 from below. FIG. 13 shows an enlarged perspective view of the engaging portion of the mounting structure of the present embodiment in the first stage. In FIG. 14, the expanded sectional view of the engaging part of the attachment structure of this embodiment in a 1st step is shown. As shown in the drawing, the inner wall 63 and the rotation stopper rib 205 of the insertion piece 6 are temporarily inserted into the storage chamber 204 of the storage unit 20 from below. Then, the insertion piece engaging claws 206 of the housing portion 20 are engaged with the temporary engagement holes 61 of the insertion piece 6. In this way, the insertion piece 6 is temporarily engaged with the accommodating portion 20. An accommodation allowance 207 for the engaged rib 91 is secured between the tapered surface 64 and the outer peripheral wall 200 in the accommodation chamber 204.

  In the second stage, first, the accommodating portion 20 to which the insertion piece 6 is temporarily engaged is brought closer to the engaged rib 91 from below. Then, the engaged rib 91 is accommodated in the accommodation chamber 204. At this time, the engaging claw 201 and the engaged rib 91 come into contact with each other. By the contact, the engaging claws 201 and the outer peripheral wall 200 are elastically curved toward the outer peripheral side. On the other hand, the engaged rib 91 is elastically curved toward the inner peripheral side. The curved engaged rib 91 passes through the accommodation allowance 207 while being in sliding contact with the engagement claw 201 and is accommodated in the accommodation chamber 204. FIG. 15 shows an enlarged perspective view of the engaging portion of the mounting structure of the present embodiment in the second stage. In FIG. 16, the expanded sectional view of the engaging part of the attachment structure of this embodiment in a 2nd step is shown. As shown in these drawings, the engaging claw 201 is engaged with the engaged hole 910 by an elastic restoring force. All the engaging claws 201 are engaged with the opposed engaged holes 910, whereby the valve module 7 is temporarily attached to the fuel tank.

  In the third stage, the insertion piece 6 is further pushed up. That is, the insertion piece 6 is fully inserted into the storage chamber 204. By this insertion, the surplus allowance 208 between the tapered surface 64 and the engaged rib 91 in the storage chamber 204 is filled with the insertion piece 6. In addition, the insertion piece engaging claw 206 relatively moves from the temporary engaging hole 61 to the main engaging hole 62. Then, the valve module 7 is permanently attached to the fuel tank. That is, the state shown in FIGS. 9 and 10 is obtained.

  Next, the effect of the mounting structure of this embodiment will be described. The attachment structure of this embodiment has the same effect as the attachment structure of the first embodiment. In the second stage, the engaged rib 91 is guided to the storage chamber 204 using the storage allowance 207 secured in the first stage. For this reason, the engaging claw 201 can be engaged with the engaged hole 910 relatively easily. Further, in the third stage, the surplus allowance 208 is eliminated from the storage chamber 204 by the main insertion of the insertion piece 6. That is, there is no play allowance for the engaged rib 91 in the storage chamber 204. For this reason, rattling between the engaging claw 201 and the engaged hole 910 is reduced. That is, rattling of the valve module 7 in the fuel tank is reduced. Further, the engaging force between the engaging claw 201 and the engaged hole 910 increases.

  In addition, the outer peripheral wall 200 and the engaging claw 201 of the housing portion 20 are reinforced by the outer wall 60 of the insertion piece 6. For this reason, the fall of engagement force can be suppressed. A tapered surface 64 is formed at the upper end of the inner wall 63 of the insertion piece 6. For this reason, it is easy to guide the engaged rib 91 to the storage chamber 204.

  Further, after the temporary attachment (second stage), the valve module 7 is temporarily fixed to the fuel tank by its own engagement force. For this reason, it is not necessary for the operator to support the valve module 7 after temporary mounting. Therefore, workability at the time of attachment improves.

(3) Others The embodiment of the mounting structure for a tank built-in component according to the present invention has been described above. However, the embodiment is not particularly limited to the above embodiment. Various modifications and improvements that can be made by those skilled in the art are also possible.

  For example, the arrangement of the engaging claws 201, 201a, 201b, 201c and the engaging holes 910, 910a, 910b, 910c in the above embodiment may be reversed. Moreover, in the said embodiment, although the fuel tank 9 was produced by HDPE and the tank built-in components (the fuel cutoff valve 1, the valve module 7) by POM, the material of these members is not specifically limited. It is sufficient that the tank built-in component has a smaller fuel swellability than the fuel tank. Further, the shapes of the engaging portion and the engaged portion are not particularly limited.

It is an exploded view of the fuel cutoff valve using the attachment structure of 1st embodiment. It is an external view of the fuel cutoff valve. FIG. 3 is a vertical sectional view of the fuel cutoff valve. It is II sectional drawing of FIG. It is a perspective view which shows the mode of the accommodating part and to-be-engaged rib at the time of attachment. It is sectional drawing which shows the mode of the accommodating part and to-be-engaged rib at the time of attachment. It is a perspective view which shows the mode of the accommodating part and to-be-engaged rib after attachment. It is an external view of the valve module using the attachment structure of 2nd embodiment. It is an expansion perspective view of the engaging part of the attachment structure. It is an expanded sectional view of the engaging part of the attachment structure. It is a disassembled perspective view of the engaging part of the attachment structure. It is a disassembled sectional view of the engaging part of the attachment structure. It is an expansion perspective view of the engaging part of the attachment structure in the first stage. It is an expanded sectional view of the engaging part of the attachment structure in the first stage. It is an expansion perspective view of the engaging part of the attachment structure in the 2nd step. It is an expanded sectional view of the engaging part of the attachment structure in the 2nd stage. It is sectional drawing of the up-down direction of the conventional valve | bulb.

Explanation of symbols

  1: Fuel shut-off valve (part with built-in tank), 2: Upper case, 20: Storage part, 20a-20c: Storage part, 200: Outer wall, 200a-200c: Outer wall, 201: Engagement claw, 201a-201c: Engaging claw, 202a to 202c: inner peripheral wall, 203a to 203c: thinning part, 204: storage chamber, 204a to 204c: storage chamber, 205: rotation prevention rib, 205a to 205c: rotation prevention rib, 206: for insertion piece Engagement claw, 207: accommodation allowance, 208: surplus allowance, 3: lower case, 30: case communication hole, 31: float chamber, 32: relief cylinder, 320: reduced diameter valve seat, 321: ball valve body, 322: Relief spring, 33: Port portion, 34: Engaged recess, 4: Bottom, 40: Engagement claw for case, 41: Tank communication hole, 42: Protrusion, 420: Float spring, 5: Flow 50: Projection valve body, 51: Recessed part, 6: Insertion piece, 60: Outer wall, 6: Insertion piece, 61: Temporary engagement hole, 62: Main engagement hole, 63: Inner wall, 64: Tapered surface, 7 : Valve module (part with built-in tank), 9: fuel tank, 90: upper wall, 91: engaged rib, 91a to 91c: engaged rib, 910: engaged hole, 910a to 910c: engaged hole , Α to γ: included angle.

Claims (7)

A tank built-in component mounting structure comprising: an engaged portion protruding from an inner surface of the fuel tank; and an engaging portion that is disposed on the tank built-in component and engages with the engaged portion,
The tank built-in component includes an accommodating portion for accommodating the engaged portion,
An attachment structure for a tank built-in component, wherein the engaging portion is arranged in the accommodating portion.   Both the engaged portion and the engaging portion are elastically deformed so that the engaging portion engages with the engaged portion, and the engaged portion is accommodated in the accommodating portion. The tank built-in component mounting structure according to claim 1, wherein the built-in component is mounted on the fuel tank. The engaged portion is an engaged rib having an engaged hole,
2. The tank built-in component mounting structure according to claim 1, wherein the engaging portion is an engaging claw that engages with the engaged hole.   The attachment structure for a tank built-in component according to claim 1, wherein a thinning portion that facilitates accommodation of the engaged portion is disposed in the accommodation portion. Furthermore, it has an insertion piece to be inserted into the housing part,
In the first stage, with the accommodation allowance of the engaged portion remaining in the accommodation portion, the insertion piece is temporarily inserted into the accommodation portion,
In the second stage, the engaging part is engaged with the engaged part, and the tank built-in component is temporarily attached to the fuel tank in a state where the engaged part is accommodated in the accommodating part.
In the third stage, the inserted piece after provisional insertion is further inserted into the housing part, and the extra part of the housing part is eliminated, whereby the tank built-in component is permanently attached to the fuel tank. The mounting structure of the tank built-in component described in 1. A tank built-in component mounting structure comprising: an engaged portion protruding from the inner surface of a fuel tank; and an engaging portion disposed on the tank built-in component and engaged with the engaged portion from the outer peripheral side. And
Both the engaged portion and the engaging portion are elastically deformed so that the engaging portion engages with the engaged portion, and the tank built-in component is attached to the fuel tank. Built-in component mounting structure. The engaged portion is an engaged rib having an engaged hole,
The tank built-in component mounting structure according to claim 6, wherein the engaging portion is an engaging claw that engages with the engaged hole.

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