JPH0610028B2 - vent - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vent hole attached to an upper end opening of a vent pipe communicating with an underground tank of a gas station such as a gas station.

[Prior Art] Japanese Patent Publication No. Sho 49-11052 discloses such a vent as shown in FIG.

That is, the tubular body 22 is screwed into the upper end opening (not shown), and the reverse cup-shaped wire mesh 2 is attached to the upper end opening of the tubular body 22.
3 is fixed by the band 24. A reverse cup-shaped cover 25 is provided to cover the wire net 23 with a gap,
The cover 25 is fixed by set screws 27 to the outer peripheral surfaces of a plurality of arms 26 protruding laterally from the tubular body 22.

In the conventional vent described above, the set screw 27 is the cover 2
Since it is screwed into the cylindrical body 22 from the outer peripheral surface of 5, the rainwater penetrates through the mounting hole of the cover 25, rust occurs in the set screw 27 and the screw hole of the cylinder, and the head of the set screw 27 is exposed. And the appearance is bad.

Japanese Utility Model Publication No. 49-11052 discloses a vent provided with a fire screen. However, in such a known technique, a screw for attaching and detaching the cover for inspection and maintenance is exposed to the outside, which causes rust by rainwater and has a bad appearance.

[Problem to be Solved by the Invention] Therefore, an object of the present invention is to provide a vent hole which can prevent rusting of screws and screw holes, has a good appearance, and is easily removable for inspection and maintenance.

[Means for Solving the Problems] The vent hole of the present invention is a tube screwed to the upper end opening of the vent pipe, which is attached to the upper end opening of the vent pipe communicating with the underground tank of the gas station. -Shaped main body and a reverse cup-shaped wire net attached to the upper end opening of the main body, the main body is provided with a plurality of arms protruding laterally and a hexagonal nut-shaped portion is formed on the outer periphery, A mounting hole is formed in the arm, and a reverse cup-shaped cover is provided on the arm.
A lower edge portion of the cover extends below the arm, a gap is formed between the inner wall of the cover and the wire net, and a step portion is formed at a portion where the cover is placed on the arm. A screw hole is formed in a portion where is abutted on the arm, and the mounting hole and the screw hole are formed on the same plane,
The cover is fixed to the arm by a screw extending in the vertical direction.

[Explanation of action and effect] Therefore, the main body can be attached and detached by screwing the hexagonal nut-like part on the outer periphery with a tool and then removing it. Since it does not rotate with the cover like the conventional product, there is no screw damage It is easy and secure to put on and take off.

Further, the screw for fixing the arm of the main body to the cover is protected from rainwater by the lower edge of the cover extending downward from the arm, and the head is placed on the lower side so that the screw is fixed. Can be prevented from rusting.

And since the screws are hidden by the lower edge of the cover, they are invisible from the outside and have a good appearance.

Further, since the screw hole formed on the lower surface of the cover and the mounting hole formed on the main body are formed on the same plane, they can be easily processed by a multi-axis drilling machine or the like.

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

In FIG. 1, an underground tank 1 is buried in site A of a gas station, and the underground tank 1 is communicated with the atmosphere by a ventilation pipe 2. The upper end opening of the ventilation pipe 2 is generally denoted by reference numeral 10 The ventilation port shown by is provided. In addition, reference numeral 3 in the drawing denotes a measuring port 5 provided in a concave portion 4 into which a measuring rod is inserted.
Is an oil supply machine, 6 is a suction pipe, 7 is a water remover, 8 is an oil supply pipe, and 9 is an oil supply port.

2 and 3, the tubular main body 11 of the vent hole 10 is screwed to the vent pipe 2. An inverted cup-shaped wire net 15 is fixed to the upper opening of the main body 11 by a clamp 16 and a set screw 17. In the middle of the outer circumference of the main body 11, a plurality of (three in the illustrated example) arms 12 are laterally projected, and the arms 12 are provided with mounting holes 13 parallel to the axis, respectively. A hexagonal nut-shaped portion 14 is formed on the lower portion of the outer periphery of the main body 11.

An inverted cup-shaped cover 19 is placed on the arm 12, and the lower edge portion extends below the lower surface of the arm 12. A gap is formed between the inner wall of the cover 19 and the wire net 15, and a step portion 20 is formed in the portion mounted on the arm 12. A screw hole 21 is formed in a portion of the step portion 20 that abuts the arm 12 so as to face the mounting hole 13, and the cover 19 has a set screw 1 inserted into the mounting hole 13.
It is fixed to the arm 12 by 8.

Note that, as shown in FIGS. 2 and 3, the screw holes 21 on the lower surface of the cover are formed in the same plane, so that the processing is easy (a multi-axis drilling machine can be used). Similarly, since the mounting hole 13 of the main body 11 is also formed on the same plane, it can be easily processed using a multi-axis drilling machine or the like.

[Advantages of the Invention] Since the present invention is configured as described above, it has the effects described below.

That is, since the set screw is inserted from the lower surface of the arm to fix the cover to the arm, it is possible to prevent rainwater from entering through the mounting hole and prevent rusting of the set screw and the screw hole.

Further, a tool (spanner) is applied to the hexagonal nut-shaped portion of the main body and screwed into the ventilation pipe to prevent breakage of the set screw when rotating with the cover as in the conventional case.

Further, since the set screw is not exposed to the side and is hidden from the lower side by the lower edge portion of the cover, the appearance can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a gas station equipped with a vent according to the present invention, FIG. 2 is a side sectional view showing an embodiment of the present invention, FIG. 3 is a bottom view of FIG. FIG. 4 is a side sectional view showing an example of a conventional vent hole. 10 ... Vent hole, 11 ... Main body, 12 ... Arm, 13 ... Mounting hole, 15 ... Wire mesh, 18 ... Set screw, 19 ... Cover, 21 ... Screw Hole

Claims (1)

[Claims] 1. A ventilating port attached to an upper end opening of a vent pipe communicating with an underground tank of a gas station, and a tubular main body screwed to the upper end opening of the vent pipe, and an upper end opening of the main body. And a reverse cup-shaped wire mesh attached to the main body, a plurality of arms are provided on the main body so as to project laterally and a hexagonal nut-shaped portion is formed on the outer periphery, and a mounting hole is formed in the arm.
An inverted cup-shaped cover is provided on the arm, the lower edge of the cover extends below the arm, and a gap is formed between the inner wall of the cover and the wire net, and the cover is placed on the arm. A stepped portion is formed in the portion where the stepped portion abuts the arm, and a screw hole is formed in the portion where the stepped portion abuts the arm. A ventilation hole, which is fixed to the arm by a screw.