JPH08244818A - Cover-mounting structure of fluid tank - Google Patents

Abstract

PURPOSE: To obtain a cover-mounting structure of a fluid tank in which a fluid- charging and -discharging hole formed in a cover member of the fluid tank can be provided in an arbitrary position as well as a plurality of fluid-charging and -discharging holes can be provided, there is no possibility that a sealing member is damaged, and a mounting operation can be easily conducted. CONSTITUTION: A screw part 3 and engaging parts 4a, 4b of a step form downward of the screw part 3 are formed on an inner wall part of a retainer 4 toward the center thereof. A cover body 10 consisting of a disc-form cover member 8 engaging with the engaging part 4b and a pressing and fixing ring 9 pressing an upper peripheral edge of the cover member 8 on the engaging part 4b while being screwed into the screw part 3 formed in the retainer 4 is detachably mounted on the engaging parts 4a, 4b of a step form (a counter sunk hole) and the screw part 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a lid of a fluid tank, and more specifically, it is provided with an injection hole and a discharge hole for a fluid formed in a lid member of a fluid tank for containing drinking water or the like. The present invention relates to a lid mounting structure for a fluid tank capable of

[0002]

2. Description of the Related Art Conventionally, as a fluid tank for accommodating drinking water or the like mounted on an aircraft or the like, for example, as shown in FIG.
Is made of fiber reinforced plastic (FRP) as a main material and is formed into a substantially cylindrical shape. As shown in FIGS. 4 and 5, the tank main body 1 is integrally formed with a retainer 4 having an internal wall surface with a threaded portion 3 at the opening 2 when the tank main body 1 is molded.

Then, the threaded portion 3 of the retainer 4 has an O
The threaded portion 7 of the lid body 6 is detachably screwed through a seal member 12 such as a ring. In addition, at the center position or non-center position of the lid member 6, a fluid injection / discharge hole 5 is provided.
a and 5b are formed.

[0004]

However, the conventional mounting structure of the lid body 6 as described above is not suitable for the injection of fluid,
Since the discharge holes 5a and 5b are not located at the center position of the lid body 6, the positions of the injection and discharge holes 5b change when the lid body 6 is screwed (the state indicated by the chain double-dashed line in FIG. 5). It was necessary to align the position on the extraction pipe side of.

Further, since the tank body 1 is fixed at a predetermined position of the machine body and there is no degree of freedom in the mounting position, when the fluid extraction pipe side is taken into consideration, the fluid injection and discharge holes 5a formed in the lid body 6 are formed. Was provided only at the central position of the lid body 6. Further, since the lid body 6 is screwed into the threaded portion 3 of the retainer 4 with the seal member 12 such as an O-ring interposed therebetween as described above, the seal member 12 such as an O-ring interposed between the retainer 4 and the retainer 4 is damaged. However, there is a problem in that the assembly work cannot be performed easily.

The present invention has been devised in view of the above conventional problems, and it is possible to provide fluid injection and discharge holes formed in a lid member of a fluid tank at arbitrary positions, and to provide a plurality of holes. Fluid injection and discharge holes can also be provided,
It is another object of the present invention to provide a lid mounting structure for a fluid tank that can be easily assembled without damaging the seal member.

[0007]

In order to achieve the above object, the present invention provides a lid member for fitting a lid main body to an engaging portion of a retainer, and an upper peripheral portion of the lid member as the engaging portion. The gist of the present invention is that it is configured by a pressing and fixing ring that is pressed and screwed into a screw portion formed on the retainer.

Further, a positioning means and a sealing member are provided between the engaging portion of the retainer and the lid member, and the gist is that the tank body is made of fiber reinforced plastic.

[0009]

The present invention is constructed as described above, and the lid main body is constituted by the lid member and the pressing and fixing ring, so that the lid member is screwed while rotating even when the lid main body is mounted on the retainer. Therefore, even if the fluid injection / exhaust holes are not located at the center of the lid body, the injection / exhaust holes will not be displaced. Therefore, it is not necessary to align the positions of the fluid extraction pipes for easy connection. Further, since the lid body is not screwed in and tightened, the seal member such as the O-ring is not damaged, and the assembling work can be easily performed.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted. FIG. 1 is an enlarged cross-sectional view of an opening 2 of a tank body 1 made of fiber reinforced plastic (FRP) embodying the present invention, and FIG. 2 is a plan view of FIG. 1 showing the opening 2 of the tank body 1. In the above, the retainer 4 having the threaded portion 3 on the inner wall surface is integrally formed when the tank body 1 is molded.

On the inner wall surface of the retainer 4, the threaded portion 3 and stepwise engaging portions 4a and 4b are formed in the lower portion thereof toward the center side, and the stepwise engaging portions 4a and 4b.
The (counterbore hole) and the screw portion 3 have a disk-shaped lid member 8 that fits into the engaging portion 4b, and the upper peripheral edge portion of the lid member 8 is pressed against the engaging portion 4b, and A detachable lid body 10 constituted by a press-fixing ring 9 screwed to the screw portion 3 formed on the retainer 4 is attached.

Fluid injection and discharge holes 5a and 5b are formed at non-center positions of the lid member 8, and the retainer 4 is also provided.
The positioning means 11 is provided between the engaging portion 4b of the
A (positioning pin) and a seal member 12 such as an O-ring are provided. Fluid injection and discharge holes 5a, 5 formed at non-center positions of the lid member 8, for example, at 90 ° and 45 ° positions.
The inner wall surface of b is composed of a metal cylinder or the like provided with a screw 13, and a pipe (not shown) on the extraction side is attached thereto.

In the embodiment of the present invention, the lid body 10 is composed of the lid member 8 and the pressing and fixing ring 9 as described above, so that the step-like engaging portion 4b formed on the inner wall surface of the retainer 4 is formed. , A lid member 8 provided with fluid injection and discharge holes 5a and 5b at predetermined positions, and a positioning means 11 and a sealing member 1.
2 at a predetermined position, and a press-fixing ring 9 is screwed into the threaded portion 3 formed on the inner wall surface of the retainer 4 and screwed in to engage the upper peripheral portion of the lid member 8 with the engagement. Press on the portion 4b.

As described above, when the lid body 10 is mounted on the retainer 4, the lid member 8 is not screwed in while rotating, so that the fluid injecting / exhausting holes 5a, 5b are provided at the central position of the lid body 8. There is no need, and even if it is not provided at the central position of the lid body 8, the positions of the injection and discharge holes 5a, 5b do not shift, and therefore there is no need to align the positions on the fluid extraction pipe side, and it is possible to connect easily. A plurality of fluid injection and discharge holes 5a and 5b can be formed in the lid body 8.

Further, since the lid body 10 is not screwed in and tightened, the seal member 12 such as the O-ring is not damaged, and the assembling work can be easily performed.

[0016]

As described above, according to the present invention, the lid main body is fitted to the engaging portion of the retainer as described above, and the upper peripheral edge portion of the lid member is pressed against the engaging portion and formed on the retainer. Since it is constituted by the pressing fixing ring screwed into the threaded portion, it has the following excellent effects. ． Even when the lid body is attached to the retainer, the lid member is not screwed in while rotating, so the fluid injection and discharge holes can be provided at arbitrary positions on the lid body, and therefore the position of the fluid extraction pipe side can be adjusted. Easy to connect without the need to match. ． Further, conventionally, only one fluid injection / exhaust hole was provided at the center of the lid body, but in the embodiment of the present invention, a plurality of attachments are possible. ． Since the lid main body is not screwed in and tightened, the seal member such as the O-ring is not damaged and the assembling work can be easily performed. ． Conventionally, when the screw portion is damaged, it is necessary to replace the lid body itself. However, by configuring the lid body with the lid member and the pressure fixing ring as in this embodiment, only the pressure fixing ring is replaced. Therefore, the repair work is easy and the manufacturing cost is low.

[Brief description of drawings]

FIG. 1 shows a fiber reinforced plastic (F
FIG. 3 is an enlarged cross-sectional view of an opening of a tank main body made of RP).

FIG. 2 is a plan view of FIG.

FIG. 3 is a perspective view of a conventional fluid tank.

FIG. 4 is an enlarged sectional view of an opening of a conventional tank body.

FIG. 5 is a plan view of FIG.

[Explanation of symbols]

1 Tank Main Body 2 Opening Part 3 Screw Part 4 Retainer 4a, 4b Stepped Engagement Part (Counterbore Hole) 5a, 5b Fluid Injection and Discharge Hole 8 Lid Member 9 Pressing Fixing Ring 10 Lid Body 11 Positioning Means (Positioning Pin) ) 12 Sealing member such as O-ring 13 Screw

Claims (3)

[Claims] 1. A retainer having a threaded portion on an inner wall surface is integrally attached to an opening of a tank body, and a lid body provided with a fluid injection / discharge hole is detachably screwed to the threaded portion of the retainer. In the lid mounting structure of the fluid tank formed by wearing,
A lid member that fits the lid main body to the engaging portion of the retainer;
A lid mounting structure for a fluid tank, comprising: an upper peripheral portion of the lid member, which is pressed against the engaging portion, and a pressing fixing ring which is screwed into a screw portion formed in the retainer. 2. The lid mounting structure for a fluid tank according to claim 1, wherein a positioning means and a sealing member are provided between the engaging portion of the retainer and the lid member. 3. The lid mounting structure for a fluid tank according to claim 1, wherein the tank body is made of fiber reinforced plastic.