JPH0811556A - Heat insulating cover of plastic fuel tank for farm mobile vehicle - Google Patents

Abstract

PURPOSE:To make the melting of this plastic part due to an external flame preventable as long as the specified time, in this plastic fuel tank attached beneath a machine body. CONSTITUTION:In a device which covers the cross direction with a floor 2 from the upside of a main frame 1 at the central part in both directions, installing a fuel tank 3 consisting of a plastic material at the side of the main frame 1 beneath this floor 2, and covers an underside of the fuel tank 3 with a lower cover 4, an upper part from almost half of outward exposed side faces 5 and 6 of at least this fuel tank 3 is covered with a plane view U-shaped side cover 7, while such a fact that an heat insulator 8 is installed in this side cover 7 is featured in this heat insulating cover for this plastic fuel tank for a farm moble vehicle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating cover for a resin fuel tank for agricultural mobile vehicles. The present invention relates to a cover that prevents the fuel tank from melting due to a flame in an agricultural mobile vehicle that uses a resin fuel tank, and that does not cause deterioration of engine performance due to the cover.

[0002]

2. Description of the Related Art Many conventional fuel tanks are thin iron plates,
There is a cover attached to the wheel side to prevent surface damage due to bounced stones while traveling, or a guard rod or frame plate attached to the bottom surface so that the fuel tank attached to the lower abdomen is not crushed during traveling on uneven roads. There was

In recent years, an increasing number of fuel tanks are made of resin to reduce their weight. However, the resin material is inferior in heat resistance to the iron plate, and cannot be commercialized unless the performance of shutting off the fuel from the flame for a certain time is improved. Further, in an agricultural mobile vehicle that continues to work for a long time even in hot weather, if the area around the fuel tank is covered in a sealed manner, the temperature of the supplied fuel rises due to the radiant heat from each part, and the engine output tends to decrease. .

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem of the conventional device, and has taken the following technical means. That is, the floor 2 covers the main frame 1 in the lateral center from the upper side in the lateral direction, and below the floor 2, a fuel tank 3 made of a resin material is provided on the side of the main frame 1 and the lower surface of the fuel tank 3 is provided. Of the lower cover 4, at least approximately half of the outer exposed side surfaces 5, 6 of the fuel tank 3 are covered with a side cover 7 having a U-shape in plan view, and a heat insulating material is provided in the side cover 7. 8
The heat-insulating cover of the resin fuel tank for agricultural mobile vehicles, which is characterized by being attached with.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated example, the present invention is folded into a fuel tank 3 made of a resin material for an agricultural tractor 9. Embodiments of the present invention will be described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative positions, etc. of the components described in this embodiment are not intended to limit the scope of the present invention to them unless otherwise specified. , It is just an example of explanation.

Front and rear wheels 10, 11 are provided in front and rear of the body of the agricultural tractor 9, and an engine 13 is mounted above the front frame 12 provided between the left and right front wheels 10, 10.
The hood 14 covers the engine 13. A front portion of the clutch housing 15 is attached to a rear end portion of the engine 13, and a transmission case 16 is attached to a rear portion of the clutch housing 15.

The main frame 1 is composed of the front frame 12, the engine 13, the clutch housing 15, and the transmission case 16. Rear axle cases 17 and 17 project to both sides from the transmission case 16 which is the main frame 1, and rear wheels 11 and 11 are attached to the projecting ends. Rear wheel 1
The upper and inner sides of 1, 11 are covered with fenders 18, 18, and the floor 2 is provided from below the seats 19 provided between the fenders 18, 18 to the front feet. Floor 2
Has a lower step side on which the driver's feet are placed and a higher seat 19 side. The floor 2 on the foot side extends from the upper side to the lateral side of the clutch housing 15 and extends substantially horizontally. As shown in FIG. 1, both side ends of the floor 2 are reinforced side surfaces 34, 34 that are bent downward, and their lower edges cover the upper portion of the fuel tank 3 in a side view. The floor 2 and the fender 18 are usually formed by drawing or bending a thin iron plate. Reference numeral 40 denotes a steering handle, which steers left and right to determine the traveling direction of the agricultural tractor 9.

Under the floor 2 on both the left and right sides of the clutch housing 15, mounting rib surfaces 21, 21 of the fuel tank 3 made of a resin material are mounted on front and rear supporting frames 24, 25. As shown in FIGS. 2, 4 and 5, the front and rear support frames 24 and 25 have their base ends attached to the side walls of the clutch housing 15, and their front ends project in a substantially horizontal direction. Then, screws 22 and 22 such as flat buttons are welded downward in the middle of the supporting frames 24 and 25.
From below, the lower end of the side cover 7 and the opening 20 of the mounting rib surface 21 at the intermediate portion in the vertical direction of the fuel tank 3 are inserted from below, and the nuts 23, 23. ． ． It is tightened by.
Nuts are welded inside the front and rear supporting frames 24, 25, and the upper portions of the mounting stays 26, 26 extending upward in the front and rear of the lower cover 4 made of a thin iron plate covering the lower portion of the fuel tank 3 are fixed by bolts 27. , 27. ． ． It is fixed with.

The bottoms of the fuel tanks 3, 3 provided on the left and right of the clutch housing 15 extend toward the center of the machine body, and are provided with fan-shaped extending portions 3a, 3a in plan view. The extending portions 3a, 3a are tapered, and the tips of the extending portions 3a, 3a are connected to each other by a hose 28 below the clutch housing 15. In this way, the left and right fuel tanks 3, 3 are connected at the bottom, and although not shown, both fuels are simultaneously sent to the engine 13 side and used for combustion. The left fuel tank 3b is provided with a fuel inlet 29 in the fender 18, the inlet 29 and the tank 3 are connected by a passage pipe 30, and the right fuel tank 3c is provided with a breather pipe 31.

As described above, the lower portions of the left and right fuel tanks 3, 3 are covered with the lower cover 4 made of a thin iron plate having an upper opening and a substantially U shape in side view. Both side edges of the lower cover 4 are
Inward bent edge 32, 32. ． ． And A mounting rib surface 21 is provided in a substantially horizontal direction at an intermediate portion of the outer end of the fuel tank 3 in the vertical direction, and the mounting rib surface 21 is mounted on the front and rear supporting frames 24 and 25. Mounting stay 2 extending above the lower cover 4 to be covered
Since the upper portions of 6, 26 are attached to the front and rear supporting frames 24, 25, the side wall surface of the fuel tank 3 above the mounting rib surface 21 has no cover.

In this state, when a fire that causes a flame of about 1 m is performed in the lower portion of the fuel tank 3 of the agricultural tractor 9, when the fuel tank 3 is not filled with fuel, the flame blocked by the lower cover 4 is indicated by an arrow. As shown in (1), it wraps around from the side wall of the fuel tank 3 to the upper wall surface and raises the temperature of the resin wall surface to melt it. The resin wall melts,
If the fuel inside blows out to the outside, a fire will occur, which is dangerous. Here, the essential part of the present invention will be described.

The outer exposed side surface 5 of the fuel tank 3 is not covered from substantially lower portions of both side surfaces to the upper portion. The outer exposed side surfaces 6 of the front and rear wall surfaces of the fuel tank 3 are covered with the mounting stays 26, 26 of the lower cover 4 at the outer ends of the substantially lower half, and the upper half is exposed. Both ends of the lower cover 4 are inclined upward, so that the flame collects outside the resin fuel tanks 3, 3. Here, the side covers 7, 7 covering the upper half of the outer exposed side surface 5 of the fuel tank 3 and the outer exposed side surfaces 6 of the front and rear wall surfaces.
Attach each one.

The side cover 7 is a U-shaped thin iron plate in a plan view, and a heat insulating material 8 such as glass wool, which closes a space between the side cover 7 and the fuel tank 3, is attached to one of both sides. As shown in the drawing, the side cover 7 has mounting surface portions 33, 33. ． And the mounting rib surface 2 of the fuel tank 3
1,21. ． Openings 20, 20. ． Has a mounting hole at the same position as, and is fastened together with the front and rear support frames 24, 25. By providing the side cover 7, the wall surface of the resin-made fuel tank 3 is shielded for a certain period of time even if an external flame is generated below the fuel tank 3 in a state where no fuel is contained above the fuel tank 3. It becomes easy to take safety measures by gaining time from to damage.

FIG. 6 shows a side cover 7 of the second embodiment. An insulator 35, which is a seal made of non-combustible rubber, is attached between the U-shaped upper edge of the side cover 7 and the lower surface of the floor 2, and the tip of the flame is attached. It is difficult to get around the underside of the floor 2. FIG. 7 shows an upper wall surface 3d of the resin fuel tank 3, and a linear groove 36 and a drill hole 3 are formed in a part of the upper wall surface 3d.
When the fuel tank 3 is heated and the internal pressure is increased and the fuel tank 3 is damaged, the ceiling part is easily damaged. If this part is damaged, the amount of fuel blown out is reduced. Although not shown in the drawing, if this easily breakable portion is provided in the fuel injection port 29 or the passage pipe 30 for injecting fuel, and these are made detachable and replaceable, the handling can be further facilitated and the cost can be reduced.

FIG. 8 shows another embodiment of the cover for covering the lower portion of the fuel tank 3. Side covers 38, 38 are provided on both left and right sides of the lower cover 4a, and their upper edges are inclined outward. The guide surface 39 is used to prevent the flame from flowing around to the lower surface of the floor 2.

[0016]

As described above, according to the present invention, the lower portion of the resin-made fuel tank 3 provided below the floor 2 is covered with the lower cover 4 made of a thin iron plate so that the flame is at the periphery of the lower cover 4 made of a thin iron plate. When the fuel tank 3 goes over the fuel tank 3 and covers the outer exposed side surfaces 5, 6 of the fuel tank 3 with the side covers 7 with the heat insulating material 8 sandwiched therebetween, the flame is directly above the fuel tank 3. It is possible to prevent the resin material from melting for a certain time without touching the side surface.

[Brief description of drawings]

FIG. 1 is a sectional front view of a main part.

FIG. 2 is a side view of a main part, which is a partial cross section.

FIG. 3 is a front perspective view in which a part of a main part is developed.

FIG. 4 is an overall side view.

FIG. 5 is an overall plan view.

FIG. 6 is a second embodiment of the side cover portion.

FIG. 7 is a side sectional view of another main part.

FIG. 8 is a second embodiment of the lower cover part.

[Explanation of symbols]

 1 Main Frame 2 Floor 3 Fuel Tank 4 Lower Cover 5 Outer Exposed Side (Side) 6 Outer Exposed Side (Front Rear) 7 Side Cover 8 Insulation Material

Claims (1)

[Claims] 1. A fuel tank 3 made of a resin material is provided laterally from above the main frame 1 at the center of the left-right direction in a lateral direction, and below the floor 2, a fuel tank 3 made of a resin material is provided laterally to the main frame 1. In the case where the lower surface of 3 is covered with the lower cover 4, at least approximately half of the outer exposed side surfaces 5, 6 of the fuel tank 3 is covered with the side cover 7 having a U-shape in plan view, and the inside of the side cover 7 is covered. A heat insulating cover for a resin fuel tank for agricultural mobile vehicles, characterized in that a heat insulating material 8 is attached to the.