JPH0223797Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a sealing device for a portion of a soundproof engine working machine that causes the refueling spout of a fuel tank to protrude from the upper wall of a soundproof case.

<Prior Art> A conventional sealing device of this type was constructed as shown in FIG.

A through hole 4 is provided in the case upper wall 45a of the soundproof case 45.
6 is opened, and the replenishment port tube 48 of the fuel tank 47 in the soundproof case 45 is passed through the through hole with a floating gap 54 left, and is projected upward. Thereby, fuel can be supplied from outside the soundproof case 45, and even if the fuel tank 47 vibrates relative to the soundproof case 45 during operation of the engine, the replenishment port cylinder 48 is prevented from colliding with the peripheral wall of the through hole 46.

The boss portion 50 of the seal lid 49 made of an elastic material such as rubber or soft plastic is seal-fitted into the replenishment spout 48, and the folded-down peripheral edge 51 of the seal lid 49 is brought into sealing contact with the case upper wall 45a from above. . As a result, the supply port 5 at the upper end of the supply port cylinder 48
3 to refill the fuel tank 47 with fuel, the fuel spilled from the replenishment port 47 can be removed from the seal lid 4.
9 to prevent it from entering the soundproof case 45 through the through hole 46.

If spilled fuel enters the soundproof case 45, it may cause problems such as fire, insulation breakdown of electrical equipment, and peeling of the sound absorbing material due to melting of the adhesive, so make sure to prevent the fuel from entering. Prevention is required.

<Problems to be Solved by the Invention> In the conventional example described above, the folded-down peripheral edge 51 of the seal lid 49 is simply brought into sealing contact with the case upper wall 45a, so that fuel passes between the contact surfaces.
There is a problem that the noise still enters the soundproof case 45 through the through hole 46.

That is, since the surface pressure between the contact surfaces is low and the shutoff force is weak, the fuel easily passes between the contact surfaces due to capillary action and suction force due to negative pressure caused by suction ventilation inside the soundproof case 45. be.

The purpose of the present invention is to reliably prevent fuel from entering the soundproof case through the through hole.

<Means for Solving the Problems> In order to achieve the above object, the present invention, as shown in FIG. By pressing the seal lid 3 into contact with the seal lid 3, the reaction force is applied to the seal lid 3.
The folded-down peripheral edge part 36 of No. 2 is brought into pressure contact with the case upper wall 20, and an annular groove 38 is formed in the middle part of the radial direction of the contact lower surface 37 of the folded-down peripheral edge part 36.
This is characterized in that the peripheral wall 39 of the 0 through hole 28 is folded up.

<Function> To explain the function of the present invention, the folded-down peripheral edge 36 of the seal lid 32 comes into strong contact with the case upper wall 20 due to the clamping force of the clamping plate 34, and the annular groove 3
By reducing the contact area by the amount formed by 8, the contact surface pressure is further increased, so that the closing force becomes strong and the passage of fuel can be strongly prevented.

Furthermore, even if the fuel is about to penetrate between the abutting surfaces, the annular groove 38 stops the penetration and prevents it from penetrating further inward.

Even in the unlikely event that a small amount of fuel penetrates between the contact surfaces, the fuel will
9 to prevent it from entering the soundproof case 2 through the through hole 28.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

Figure 1 is a longitudinal sectional front view of the fuel tank filler port, Figure 2 is a longitudinal sectional front view of the soundproof engine generator, and 3.
The figures each show a cross-sectional plan view of a soundproof engine generator.

In the figure, reference numeral 1 indicates the entire engine generator (working machine), and this engine generator 1 has a generator 4 in a soundproof room 3 inside a soundproof case 2, an engine 5 that drives the generator 4, and a radiator 6 in order from the front. It has been placed.

The front wall 7 of the soundproof case 2 has an instrument panel 8 and a terminal board 9.
A control panel 10 is installed with and arranged above and below.
A cooling air intake 11 is provided below the control panel 10.

In addition, cooling air intakes 16 and 18 are opened in the bottom wall 13 of the soundproof case 2 in the portion facing the oil pan 12 below the engine 5, and in the upper portions of the left and right side walls 14 and 15 of the soundproof case 2, respectively. There is,
When the radiator fan 17 is driven, the inside of the soundproof room 3 on the generator 4 side becomes negative pressure from the radiator fan 17, and outside air is sucked in from each of the cooling air intakes 11, 16, and 18, and the inside of the soundproof room 3 is heated. After the radiator 6 is cooled by ventilation, the ventilation opening 21 opened in the rear part of the upper wall 20 of the soundproof case 2 is opened from the ventilation chamber 19.
It is designed to be released to the outside through.

A muffler 22 and an air cleaner 23 are arranged and fixed on the left and right above the engine 5, and a fuel tank 24 is attached above the generator 4.

As shown in FIG. 1, this fuel tank 24 is fixedly supported at both ends by bands 26 on brackets 25 attached to the left and right side walls 14 and 15 of the soundproof case 2, and has a spout for refueling. 27 penetrates a through hole 28 opened in the upper wall 20 of the soundproof case 2 and projects upward. The replenishment port 29 at the upper end of the refueling port tube 27 is covered with a cap 30 that can be opened and closed.

A sealing device S is provided in the supply port cylinder portion 27 that passes through the through hole 28.

This sealing device S has a floating gap 3 in the through hole 28.
The boss part 33 of the seal lid 32 made of an elastic material such as rubber is tightly and seal-fitted into the replenishment spout 27 which is penetrated upward with the opening 1 open. By pressing and fixing with screws 35, the reaction force causes the contact lower surface 37 of the folded-down peripheral edge 36 of the seal lid 32 to be pressed against the upper wall 20 of the soundproof case 2.
It is made to come into pressure contact with.

Abutting lower surface 3 of folded-down peripheral edge 36 of seal lid 32
7 has a single annular groove 38 formed in the middle in the radial direction.

Further, the peripheral wall portion 39 of the through hole 28 is folded up and its tip portion 39a is folded down to form the peripheral edge portion 39 of the sealing lid 32.
An annular floating groove 40 formed between the boss portion 33 and the boss portion 33
It has been pushed inside.

Note that three annular grooves 41 are formed in the boss hole inner circumferential surface 33a of the boss portion 33 of the seal lid 32 that is seal-fitted to the replenishment port cylinder 27 of the fuel tank 24. It is designed to prevent seepage.

The operation of the fuel tank filling port cylinder sealing device configured as described above will now be described.

When replenishing the fuel tank 24 with fuel, the cap 30 of the replenishment port tube 27 is removed and the fuel is refilled from the replenishment port 29. At this time, fuel splashes and fuel spilled from the refill port 29 flow down the refill port tube 27 or adhere to the seal lid 32 and the upper wall 20 of the soundproof case 2.

When the engine generator 1 is restarted after refueling, the radiator fan 17 creates a negative pressure in the soundproof chamber 3 on the fuel tank 24 side, and this negative pressure removes the fuel spilled during refueling. It tries to be inhaled into the soundproof case, but the refill tube 2
The fuel flowing through the annular groove 4 formed in the inner peripheral surface 33a of the boss hole of the boss portion 33 of the seal lid 32
1, the intrusion into the soundproof case is reliably prevented.
In addition, the seal lid 32 and the upper wall 20 of the soundproof case 2
The fuel attached to the folded-down peripheral edge 3 of the seal lid 32
The annular groove 38 blocks the leakage of the fuel from the abutment lower surface 37 of the soundproof case 2, thereby preventing the fuel from being sucked into the soundproof case 2. In addition, even in the unlikely event that fuel passes through the annular groove 38 and seeps into the through hole 28 side, the peripheral edge 39 of the through hole 28, which is folded upward, is dammed to prevent the fuel from being sucked into the soundproof case 2. To prevent.

In the above embodiment, the working machine attached to the engine 5 is the generator 4, but this can also be changed to a compressor, a pump, or the like.

<Effects of the invention> Since the present invention is constructed and operates as described above, the closing force due to the contact surface pressure between the folded-down peripheral edge of the seal lid and the contact surface of the upper part of the case is reduced by the tightening force of the clamping plate. In addition to being strengthened by applying force and by reducing the contact area due to the formation of the annular groove, the annular groove prevents fuel from penetrating, and furthermore, the fuel is dammed up by the folded-up peripheral wall. Since it does not enter the through hole, it is possible to strongly and reliably prevent fuel from entering the soundproof case through the through hole.

This makes it possible to reliably eliminate problems such as fires caused by fuel entering the soundproof case, insulation breakdown of electrical equipment, and peeling of sound absorbing materials due to melting of adhesive.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional front view of a sealing device installed in a fuel tank filler port, FIG. 2 is a longitudinal sectional side view of a soundproof engine generator, and FIG. Figure 3 is a cross-sectional plan view of the soundproof engine generator, and Figure 4 is the first main part of the conventional example.
It is a figure equivalent figure. 1... Soundproof engine generator, 2... Soundproof case, 20... Case upper wall, 24... Fuel tank,
27... Supply port cylinder, 28... Through hole, 31... Idle gap, 32... Seal lid, 33... Boss part, 3
4...Tightening plate, 36...Folding peripheral edge, 37...
Abutting lower surface, 38... annular groove, 39... peripheral wall portion of 28.

Claims (1)

[Scope of utility model registration request] A through hole 28 is made in the case upper wall 20 of the soundproof case 2 of the soundproof engine working machine 1, and the filler port tube 27 of the fuel tank 24 inside the soundproof case 2 is passed through the through hole 28 with a free movement gap 31 left therein, and is inserted upward. The boss portion 33 of the seal lid 32 made of an elastic material is fitted into the replenishment port cylinder 27, and the seal lid 3
In a sealing device for a fuel tank replenishment port cylinder of a soundproof engine working machine, in which the folded-down peripheral edge 36 of No. 2 is brought into seal contact with the case upper wall 20 from above, a tightening device is fixed to the boss portion 33 of the seal lid 32 from below. By pressing the attached plate 34 into contact with the case upper wall 20, the reaction force causes the folded down peripheral edge 36 of the seal lid 32 to press into contact with the case upper wall 20, and the contact lower surface 37 of the folded down peripheral edge 36 is pressed against the case upper wall 20. An annular groove 38 is formed in the middle part in the radial direction, and a peripheral wall part 39 of the through hole 28 of the case upper wall 20 is formed.
A sealing device for a fuel tank replenishment port cylinder of a soundproof engine working machine, characterized by being constructed by folding up.