JPH038294B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a side frame structure of an industrial vehicle such as a forklift.

Conventional technology Some industrial vehicles such as forklifts use LPG as fuel, which is advantageous in terms of emission control and fuel efficiency.
A so-called hybrid fuel supply system that uses gasoline in combination is known. this is
Since LPG has poor starting performance, gasoline is used to start the engine, and LPG is used after the engine has warmed up. Figure 4 shows an example of a forklift employing such a hybrid fuel supply system. As shown in the figure, there is a hydraulic oil tank on one side and a fuel tank on the other side.When starting the engine, the gasoline stored in the fuel tank is used, and after the engine has warmed up, it is placed on the counterweight 3. equipped
LPG is introduced and switched from LPG cylinder 4. This LPG cylinder 4 is placed vertically on a counterweight 3 as shown in the figure, and is fixed by a clamp mechanism (not shown), since there is no mounting space especially in a small forklift. In the figure, 5 is an operator seat, 6 is a mast assembly, 7 is a drive wheel, 8 is a steering wheel, and 9 is an overhead guard. Other references include those shown in Japanese Utility Model Application Publication No. 56-51630.

Problems to be Solved by the Invention In the conventional configuration described above, when an operator is seated on the operator seat 5, the LPG cylinder 4 is placed upright on the counterweight 3, so the operator's head is placed above the LPG cylinder 4. This may cause discomfort.

Furthermore, when reversing, the LPG cylinder 4 blocks the rear view, significantly impairing cargo handling operations.

Furthermore, when replacing the LPG cylinder 4, the LPG cylinder 4, which is quite heavy, must be placed on the counterweight 3.
Not only did it require heavy labor for the operator, but it was also extremely dangerous as it had to be reloaded to a higher position.

Means for Solving the Problems The present invention focuses on the fact that in industrial vehicles with a hybrid fuel supply system, LPG is used as a regular fuel and gasoline is used for starting, so the fuel tank does not require much volume. A front-rear frame member having a box cross-sectional structure, the front end of which is connected to the drive axle mounting member and the rear end of which is connected to the steering axle mounting member, is disposed at the upper side of the vehicle body, and a frame member is provided within the frame member. A fuel tank is separated by front and rear partition walls, and a fuel tank is provided below the frame member with front and rear side walls, a bottom wall connected across these front and rear walls, and a hinge connected to the bottom wall so as to be openable and closable. It consists of an opening/closing door that forms the outer wall.
An LPG cylinder storage section is configured, and LPG cylinders are stored and mounted in the LPG cylinder storage section on the lower side of this frame member.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, with the same reference numerals assigned to the same parts as in the conventional structure.

1 to 3, a side frame 2 on one side of a vehicle body 1 has a large-capacity hydraulic oil tank 10 in its center, as in the conventional case. As will be described later, the other side frame 2A is composed of a skeleton member 11 with a box cross-sectional structure extending in the front-rear direction at the upper side of the vehicle body, and an LPG cylinder storage section 12 formed below this skeleton member 11. ing.
The frame member 11 includes a pair of steel plates 1 having an L-shaped cross section.
1a and 11b, and the front end is joined to the drive axle mounting member 13, specifically, butted to the back surface of the tilt cylinder support plate 13b joined to the outer rear end of the drive axle mounting plate 13a. It has been done. Further, the rear end portion of the frame member 11 is joined to a steering axle mounting member 14 that is installed across both side frames 2 and 2A. Approximately at the center of this skeleton member 11,
The fuel tank 17 is separated by the front and rear partition walls 15 and 16.
are separated.

The LPG cylinder storage section 12 is connected to the skeleton member 1
1, the front and rear side walls, specifically the tilt cylinder support plate 13b and the skeleton member 1.
A frame rear plate 18 joined to the rear lower surface of the frame rear plate 18, a bottom wall 19 having a dogleg-shaped cross section joined across the tilt cylinder support plate 13b and the frame rear plate 18, and a hinge member attached to the bottom wall 19. 20, and an opening/closing door 21 having an L-shaped cross section and forming an outer wall substantially aligned with the outer surface of the skeleton member 11. Of course, the free end of the opening/closing door 21 is supported by the frame member 11 by a locking device (not shown).
In Figs. 2 and 3, 22 is a fuel inlet installed on the upper wall of the fuel tank 17, 23 is a tilt cylinder installed between the bracket 24 fixed to the tilt cylinder support plate 13b and the mast assembly 6, and 25 is a Engine body, 26 is skeleton member 1
A counterweight locking hook 27 is provided on the upper surface of the rear end of 1, and 27 is a center cross connected across the lower surface of one side frame 2 and the lower surface of the other side frame 2A, that is, the bottom wall 19 of the LPG cylinder storage section 12. is a member.

According to the structure of the above embodiment, the LPG cylinder 4 is stored and mounted in the storage section 12 below the frame member 11 constituting the other side frame 2A.
Problems such as the existence of the cylinder 4 obstructing the rear view or interference with the operator's head causing discomfort can be eliminated, and the strength itself is not reduced. Furthermore, when replacing the LPG cylinder 4, the opening/closing door 21 can be opened and the replacement work can be carried out at a low ground clearance position, which does not require heavy labor on the operator and is very advantageous in terms of safety. On the other hand, although the fuel tank 17 has a smaller volume than the conventional one, as mentioned above, the gasoline in the fuel tank 17 is only used when starting the engine, so the amount consumed is small, and therefore it does not cause any trouble. There isn't.

Effects of the Invention As described above, according to the present invention, since the LPG cylinder is stored and mounted in the LPG cylinder storage section formed on the lower side of the longitudinal frame member,
The LPG cylinder does not exist on the counterweight, which worsens rear visibility or interferes with the operator's head, causing discomfort. In addition, when configuring the storage section, the vehicle width and overall length are increased. There is no damage to turning performance, ability to pass through narrow roads, etc. Furthermore, when replacing LPG cylinders, the door can be opened and the work can be done from a low ground clearance position, making the work easier and safer, which has many practical effects.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
1, FIG. 3 is a sectional view taken along the line - in FIG. 1, and FIG. 4 is a perspective view showing the conventional structure. 1...Vehicle body, 2A...Side frame, 4...
LPG cylinder, 11...skeleton member, 12...LPG
Cylinder storage part, 13... Drive axle mounting member, 14... Steering axle mounting member, 15... Front bulkhead, 16
... Rear bulkhead, 17 ... Fuel tank, 13b
...Front side wall (tilt cylinder support plate), 18... Rear side wall, 19... Bottom wall, 20...
...Hinge member, 21... Opening/closing door.

Claims (1)

[Claims] 1 At the upper side of the vehicle body, a front-rear skeleton member with a box cross-sectional structure is installed, the front end of which is connected to the drive axle mounting member, and the rear end of which is connected to the steering axle mounting member. A fuel tank is separated by a partition wall, and below the frame member, a front and rear side wall, a bottom wall joined across these front and rear walls, and an outer wall hinged to the bottom wall so as to be openable and closable. LPG consisting of an opening/closing door
A side frame structure for an industrial vehicle, characterized by comprising a cylinder storage section.