JP4454252B2 - Plastic container lid-like member mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lid-shaped member (pump module) mounting structure for closing an opening formed in a resin-made container main body in a resin container typified by a fuel tank mounted on an automobile, and in particular, a lid-shaped member. The ring-shaped member embedded integrally in the outer periphery of the opening of the resin container main body is fixed to the lid-shaped member mounting structure of the resin container insert-molded by the resin forming the resin container main body. .
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a fuel tank which is a resin container, a structure of a holding ring for fixing a lid body to an opening of a resin tank body is known. A seal installation groove is formed on the upper surface of the flange portion in the vicinity of the opening of the resin tank body, and the seal is held by the seal installation groove. A structure fastened by a metal retaining ring is disclosed in EP0816151A1 (see, for example, Patent Document 1).
[0003]
6 shows an opening of a fuel tank according to a conventional example, FIG. 6 (a) is a plan view of the opening, and FIG. 6 (b) is a sectional view taken along line GG shown in FIG. 6 (a). .
As shown in FIGS. 6A and 6B, a metal holding ring 120 is attached to the flange 112 forming the opening 114 of the fuel tank 110. The holding ring 120 includes split rings 120a and 120b, which are engaged by a hinge 122 and fastened by a bolt 124 and a nut 125. The split rings 120a and 120b fasten the holding plate 116, which is a lid of the fuel tank 110, to the flange 112, thereby sealing the fuel tank 110.
[0004]
Further, the present applicant has applied for Japanese Patent Application No. 2002-355459 “Fuel Tank Cover Mounting Structure”. FIG. 7 is a cross-sectional view of an opening of a fuel tank T according to a conventional example. As shown in FIG. 7, a metal ring-shaped member 58 is insert-molded in a resin tank body 52. The bolt 61 integrally planted on the metal ring-shaped member 58 is also made of metal, and the metal retainer 59 is fastened to the ring-shaped member 58 by the bolt 61 and the nut 63. Yes. For this reason, the opening part 57 of the resin-made tank main body 52 and the cover body 51 can be firmly adhered and fixed. Thereby, the lid 51 can be sealed and attached to the opening 57 in the opening 57 opened in the tank main body 52 of the fuel tank T.
[0005]
[Patent Document 1]
EP0816151A1 (FIG.1, FIG.3)
[0006]
[Problems to be solved by the invention]
However, in the above-described conventional example, since the tank body is made of resin, heat shrinkage occurs in the tank body over time, improving the mounting accuracy between the ring-shaped member and the tank body (resin container). There was a problem that it was difficult.
[0007]
The present invention has been made to solve the above-mentioned problems, and can maintain good sealing performance of the opening provided in the resin container and improve the mounting accuracy of the ring-shaped member. It is an object of the present invention to provide a lid-like member mounting structure for a resin container.
[0008]
[Means for Solving the Problems]
According to the first aspect of the present invention, which solves the above-described problem, a lid-like member is attached to a resin container that covers the opening provided in the resin-made container body and covers the resin-made container body. The resin container body includes a groove provided in a ring shape on the outer surface of the resin container body along the outer periphery of the opening, and a metal body embedded integrally in the groove. A ring-shaped member , a plurality of bolts provided circumferentially on the ring-shaped member along the outer periphery of the opening, and a drainage channel provided on the outer surface of the resin container body and communicating with the groove. Immediately after the molding of the resin container body, a space portion is provided between the groove inner wall surface on the outer peripheral side of the groove and the outer peripheral end surface of the ring-shaped member and the bolt to allow for heat shrinkage of the resin. The groove inner wall surface on the outer peripheral side of the groove and the ring-shaped portion at the stage where the heat shrinkage is completed And characterized in that at least one of the outer peripheral end surface is brought into contact with each other of the bolt.
[0009]
According to invention of Claim 1, the space part which anticipated the thermal contraction of resin between the groove | channel inner wall surface of the outer peripheral side of the groove | channel arrange | positioned in ring shape, and the said ring-shaped member and the outer peripheral end surface of a volt | bolt. Therefore, the groove inner wall surface on the outer peripheral side of the groove and the outer peripheral end surface of at least one of the ring-shaped member and the bolt come into contact with each other when the heat shrinkage is completed after the resin molding . As a result, it is possible to firmly bond between at least one of the ring-shaped member and the bolt and the resin container main body, and it is possible to maintain a good sealing property of the opening, and the mounting accuracy of the ring-shaped member. Can be improved.
In addition, because the drainage channel for draining the water accumulated in the groove is provided on the outer surface of the resin container body, it is possible to drain the water to the outside, preventing the occurrence of rust, and sealing the opening well Can be maintained, and the mounting accuracy between the ring-shaped member and the resin container body can be improved.
[0014]
Invention of Claim 2 is invention of Claim 1, Comprising: Immediately after shaping | molding of the said resin container main body, the bottom face of the said space part is arrange | positioned lower than the bottom face of the said ring-shaped member and the said volt | bolt. It is characterized by keeping .
[0015]
According to the second aspect of the present invention, since the bottom surface of the space portion formed in the groove is disposed lower than the bottom surface of the ring-shaped member and the bolt , the outer peripheral end surface of at least one of the ring-shaped member and the bolt is the groove. It can be brought into close contact with the inner wall surface, can maintain a good sealing property of the opening, and can improve the mounting accuracy between the ring-shaped member and the resin container main body.
[0018]
The invention according to claim 3 is the invention according to claim 1 or 2 , wherein the ring-shaped member is insert-molded with a resin for molding the resin container body to constitute the resin container body. It is characterized by being.
[0019]
According to invention of Claim 3 , since the ring-shaped member is insert-molded by the resin which shape | molds the resin-made container main body, and comprises the resin-made container main body, between a ring-shaped member and the resin-made container main body, The mounting accuracy can be improved, and it can be an effective means even when an impact occurs.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
A lid-like member mounting structure for a resin container according to an embodiment of the present invention will be described with reference to the drawings by taking a fuel tank as an example. The fuel tank and the tank main body in the present embodiment correspond to the resin container and the resin container main body shown in the claims.
[0021]
FIG. 1 is a perspective view showing an outline of a fuel tank (resin container) of the present embodiment. 2A is a vertical cross-sectional view taken along the line AA in FIG. 1, and FIG. 2B is a view as seen from an arrow B in a portion C of FIG. 2A. FIG. 3 is an enlarged cross-sectional view of a portion C in FIG.
[0022]
As shown in FIGS. 1 to 3, the fuel tank 1 is configured to include a resin-made tank main body 2 having a barrier material at least in part and an opening 5 opened in the tank main body 2. . A lid-like member 9 (see FIG. 3) made of a pump module or the like is attached to the opening 5. A groove 6 is provided in a ring shape on the outer surface of the tank body 2 at the outer peripheral portion of the opening 5, and the ring-shaped member 3 is resin-molded in the groove 6 by insert molding. The ring-shaped member 3 has a shape that does not catch on the tank main body 2 in the direction of heat shrinkage when the resin tank main body 2 is thermally contracted, or a flat plate that has no unevenness, and further, a circular shape along the outer periphery of the opening 5. A plurality of bolts 4 standing in a circumferential shape are provided. Reference numeral 7 denotes a drainage channel, and the drainage channel 7 is provided on the outer surface of the tank body 2. As a result, the drainage channel 7 has a structure that communicates with the interface between the ring-shaped groove 6 and the bottom surface of at least one of the ring-shaped member 3 or the bolt 4 and the periphery thereof, thereby draining water to the outside. And the occurrence of rust can be prevented. Thus, although the one drainage channel 7 is provided in the surface of the tank main body 2, you may increase the number suitably.
[0023]
4 shows an enlarged cross-section of the E portion of FIG. 3, FIG. 4 (a) is a cross-sectional view showing the vicinity of the opening 5 immediately after resin molding, and FIG. 4 (b) shows the heat after resin molding. It is sectional drawing which shows the vicinity of the opening part 5 of the state which contraction was completed. As shown in FIG. 4B, the opening 5 of the fuel tank 1 is covered with a lid-like member 9 indicated by a broken line, and the lid-like member 9 is fastened to the tank body 2 by a retainer 10, a nut 11, or the like. Has been. Thereby, the tank main body 2 is sealed. The tank body 2 includes a groove 6 provided in a ring shape on the outer peripheral portion of the opening 5 and a metal ring-shaped member 3 embedded in the groove 6 integrally. Reference numeral 8 denotes a space portion. The space portion 8 includes a groove inner wall surface 6 a on the outer peripheral side of the groove 6 disposed in a ring shape around the opening 5, and an outer peripheral end surface 3 a ( 4 (a)) or at least one of the outer peripheral end surface 4c (see FIG. 4 (a)) of the head 4a of the bolt 4, and is a space as a heat shrinkage allowance F that allows for heat shrinkage of the resin. . For this reason, although the space part 8 exists in the tank main body 2 just after resin molding, as shown in FIG.4 (b), it does not exist as space in the stage where heat shrink was completed after resin molding. At this time, the space portion 8 is not a space but is present in a state where the ring-shaped member 3 is in contact with the groove inner wall surface 6a. The bolt 4 is provided with the screw portion 4b on the upper side.
[0024]
FIG. 5 is a cross-sectional view taken along the line DD in FIG. 2 (b) and shows a cross section of the drainage channel 7. The drainage channel 7 is led out from the bottom surface of the space 8 formed in the tank body 2 immediately after resin molding, and is drawn out to the outer surface of the tank body 2. Further, the drainage channel 7 drains the water accumulated in the interface between the groove 6 arranged in a ring shape, the bottom surface of the ring-shaped member 3 and the bolt 4 (see FIGS. 2 and 4), and the periphery thereof. Provided. For this reason, the bottom surface of the space 8 formed adjacent to the ring-shaped groove 6 immediately after resin molding is disposed lower than the bottom surfaces of the ring-shaped member 3 and the bolt 4. At this time, the cross-sectional shape of the groove 6 is not particularly limited as long as drainage is possible.
[0025]
Next, the operation of the lid-like member mounting structure of the fuel tank (resin container) having the above configuration will be described. 4 (a) and 4 (b), a cross-sectional view (FIG. 4 (a)) showing the opening 5 of the tank body 2 immediately after resin molding, and the tank body 2 in a state in which heat shrinkage is completed after resin molding. A cross-sectional view (FIG. 4B) showing the opening 5 will be described. As shown in FIG. 4 (a), the inner wall surface 6a of the groove immediately after resin molding is between the outer peripheral end surface 3a of the ring-shaped member 3 or the outer peripheral end surface 4c of the head 4a of the bolt 4 and the tank body. 2 has a space portion 8 that allows for heat shrinkage F when heat shrinks immediately after resin molding. Further, as shown in FIG. 4B, in the state where the heat shrinkage is completed after the resin molding, the groove 6 disposed in the ring shape is heat shrunk in the direction of the white arrow, At least one of the outer peripheral end surface 3 a of the metal ring-shaped member 3 provided therein or the outer peripheral end surface 4 c of the head 4 a of the bolt 4 is fixed in contact with the groove inner wall surface 6 a on the outer peripheral side of the groove 6. . Thus, at least one of the outer peripheral end surface 3a or the outer peripheral end surface 4c is in a state where there is no gap between the groove inner wall surface 6a. That is, at least one of the ring-shaped member 3 or the bolt 4 can be firmly coupled to the tank main body 2, the good sealing performance of the opening 5 can be maintained, and the mounting accuracy of the ring-shaped member can be increased. Can be improved.
[0026]
As shown in FIG. 5, the bottom surface of the space portion 8 formed in the ring-shaped groove 6 is disposed lower than the bottom surfaces of the ring-shaped member 3 and the bolt 4. Moreover, since the drainage channel 7 led out from the bottom surface of the space portion 8 is provided on the outer surface of the tank body 2, the interface between the ring-shaped groove 6 and the bottom surface of the ring-shaped member 3 and the bolt 4 and Water collected in the vicinity is drained outside the fuel tank. Thus, in an automobile to which the structure is applied, it is possible to mount an excellent quality resin fuel tank.
[0027]
The preferred embodiments have been described above. However, the present invention is not limited to the above-described embodiments, and appropriate modifications can be made without departing from the scope of the present invention. For example, in the present embodiment, one drainage channel 7 is provided on the surface of the tank body 2, but it may be increased as appropriate. Moreover, as long as the bolt provided in the ring-shaped member is erected with the threaded portion on the upper side, the presence or absence of the head of the bolt and the fixed form with respect to the ring-shaped member are not particularly limited. In the present embodiment, the present invention is applied to a fuel tank of an automobile. However, the present invention is not limited to a fuel tank of an automobile, and it is needless to say that the present invention is generally applied to resin parts molded into a container shape. .
[0028]
As described above, according to the present invention , heat shrinkage of the resin is expected between the groove inner wall surface on the outer peripheral side of the groove disposed in the ring shape and the outer peripheral end surfaces of the ring-shaped member and the bolt . Since the space portion is provided, the outer peripheral end surface of at least one of the ring-shaped member and the bolt comes into contact with the inner wall surface of the groove on the outer peripheral side of the ring-shaped groove when the heat shrinkage is completed after the resin molding. As a result, a strong coupling between at least one of the ring-shaped member and the bolt and the resin container main body (tank main body) becomes possible, and good sealing of the opening can be maintained, and the ring It is possible to improve the mounting accuracy of the member. Thus, when the structure is applied to an automobile, an excellent quality fuel tank can be obtained.
[0029]
Further, according to the present invention, since it has a plurality of bolts erected circumferentially along the outer periphery of the open mouth, it is possible to maintain good sealing of the opening, the attachment of the ring-shaped member Accuracy can be improved.
[0031]
Further , according to the present invention , since the bottom surface of the space portion formed in the groove is disposed lower than the bottom surface of the ring-shaped member and the bolt, the outer peripheral end surface of at least one of the ring-shaped member and the bolt is the groove inner wall surface. It can be brought into close contact with each other, can maintain good sealing performance of the opening, and can improve the mounting accuracy between the ring-shaped member and the resin container body (tank body).
[0032]
Further, according to the present invention, due to the provision of a drainage channel for draining water accumulated in the groove on the outer surface of the resin vessel body (tank body), it is possible to drain the reservoir waiting water to the outside, rust Is prevented, and good sealing performance of the opening can be maintained, and the mounting accuracy between the ring-shaped member and the resin container main body can be improved.
[0033]
Further , according to the present invention , the ring-shaped member is insert-molded with a resin for molding a resin container main body (tank main body) to form the resin container main body. The mounting accuracy can be improved, and it is an effective means when an impact or the like occurs.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an outline of a fuel tank according to an embodiment of the present invention.
2A is a longitudinal cross-sectional view taken along line AA in FIG. 1, and FIG. 2B is a view as seen from an arrow B of a portion C in FIG.
3 is a longitudinal sectional view of a portion C in FIG. 2 (a). FIG.
4A and 4B show an enlarged cross section of an E portion in FIG. 3, where FIG. 4A is a cross-sectional view showing the vicinity of an opening immediately after resin molding, and FIG. 4B is a state in which heat shrinkage is completed after resin molding. It is sectional drawing which shows the vicinity of the opening part.
FIG. 5 is a cross-sectional view taken along the line DD in FIG.
6A and 6B show an outline of a conventional fuel tank lid mounting structure, where FIG. 6A is a plan view and FIG. 6B is a cross-sectional view taken along line GG in FIG.
FIG. 7 is a cross-sectional view schematically showing a conventional fuel tank lid mounting structure.
[Explanation of symbols]
1 Fuel tank (resin container)
2 Tank body (resin container body)
3 ring-shaped member 3a outer peripheral end surface 4 bolt 4a head 4b screw 4c outer peripheral end surface 5 opening 6 ring-shaped groove 6a groove inner wall surface 7 drainage channel 8 space

Claims (3)

A lid-like member mounting structure for a resin container that covers the opening provided in the resin-made container body and seals the resin-made container body,
The resin container body is
A groove provided in a ring shape on the outer surface of the resin container body along the outer periphery of the opening;
A metal ring-shaped member integrally embedded in the groove ;
A plurality of bolts standing circumferentially on the ring-shaped member along the outer periphery of the opening;
A drainage channel provided on the outer surface of the resin container main body and communicating with the groove,
Immediately after the molding of the resin container main body, a space portion is provided between the inner wall surface of the groove on the outer peripheral side of the groove and the outer peripheral end surface of the ring-shaped member and the bolt so as to allow heat shrinkage of the resin. When the step is completed, the groove inner wall surface on the outer peripheral side of the groove and the outer peripheral end surface of at least one of the ring-shaped member and the bolt are brought into contact with each other . Immediately after the molding of the resin vessel body, wherein the bottom surface of the space portion, the ring-shaped member and the lid-like resin container according to claim 1, characterized in that you disposed lower than the bottom surface of the bolt Member mounting structure. The lid shape of the resin container according to claim 1 or 2 , wherein the ring-shaped member is insert-molded with a resin that molds the resin container body to form a resin container body. Member mounting structure.

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