JPH021078B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a fork-shaped pallet transport vehicle connected to a lift vehicle, and more specifically, a fork member is placed in a horizontal state on a flat chassis frame equipped with wheels. This invention relates to a so-called fork-shaped pallet transport vehicle that is supported so that it can be raised and lowered. The pallet carrier A is connected to the elevator C of the lift vehicle B as shown in FIG. Insert the pallet into the space, and in this inserted state, use remote hydraulic control from the lift vehicle to slightly raise the fork members that make up the transport vehicle A relative to the chassis frame, so that the pallet can be transported, that is, the pallet is lifted off the ground. As lift vehicle B runs in this state, pallet transport vehicle A travels together with its wheels touching the ground to transport the loaded pallet, and lifts elevator C of lift vehicle B at a predetermined transport position. As a result of the operation, the entire pallet transport vehicle A is lifted up and placed on a high platform such as a truck, and after being placed, the transport vehicle A is pulled out from the bottom space of the pallet as the lift vehicle B retreats. be.

[Prior art]

By the way, as shown in FIGS. 6 and 7, in the conventional fork-shaped pallet transport vehicle A, one end of an undulating rod 3 is pivotally supported by a shaft 4 on a chassis frame 2 provided with wheels 1. The other end is connected to the fork member 6 by the pin 5, and one end of the retractable rod 7 is further connected to the other end of the undulating rod 3.
The fork member 6 is advanced by the rotation of the drive member 8, so that the hoisting rod 3 stands up as shown in FIG. 7 from the lying state shown in FIG. The pallet is lifted up in a floating manner, but with this structure, the fork member 6 is raised and lowered by the rotation of the undulating rod 3, so that the fork member 6 is raised and lowered vertically. Therefore, for example, as shown in FIG. When loads are placed next to each other and you try to lift one of them, as shown in Figure 2, the load rises in the direction of the vertical arrow, so it may get caught on the adjacent load. In order to prevent this, there is the trouble of raising the fork member 6 while reversing the lift vehicle B, and conversely, it is necessary to lower the load supported by the fork member 6 next to the load already placed. If you do,
This has the drawback that the so-called lifting and lowering operations of the load are extremely complicated, as the load must be lowered by pressing against the load that has already been placed.

In addition, in the above conventional structure, in order to maintain the strength of the pin 5 that connects the fork members 6, the thickness of the fork members 6 in the height direction must be set large, and as a result, the fork members It also had the disadvantage of being unstable during transportation, in that the height from the ground when ascending was unnecessarily large.

[Object of the present invention]

The present invention raises and lowers the fork member obliquely while maintaining a horizontal state, thereby moving the load in the diagonal direction of the arrow as shown in Fig. prevent the
In addition, when the fork member floats down, it can be lowered so as to come into contact with the neighboring load without strain, and the height above the ground when the fork member is raised can be made as low as possible.

〔Example〕

As shown in FIG. 1, the drive unit case 1 has a fork-like external shape with two parallel forks 2 protruding from the front left and right sides of the case. A hydraulic cylinder 3 is provided which is connected to the control device of the lift vehicle B via a hydraulic hose (not shown).

Specifically, each fork 2 has a chassis frame 4 having a flat and elongated side surface and a rectangular frame shape in plan, and a chassis frame 4 having a downward opening that is fitted over the frame. The fork member 5 has a flat and elongated box shape, and is attached to the chassis frame 4.
is equipped with wheels 4a at the front and rear, and on the outside of the left and right frame rods constituting the frame 4, slopes 6 in the front and rear direction are formed at the front and rear ends thereof, while the fork member A slope 7 parallel to the slope 6 is formed on the inside of the left and right side plate portions 5, and the fork member 5 is supported by the chassis frame 4 by abutting the slopes 6 and 7 so as to be able to ride on each other. It is something that

Connecting rods 8 are bridged to the proximal ends of the fork members 5, and the piston rods 9 of the hydraulic cylinders 3 are movably connected to the connecting rods 8, respectively.

In this example, as means for forming the slopes 6 and 7, pieces are attached to the chassis frame and the fork member, and the slopes are formed on the pieces.

Further, it is preferable that the slopes 6 and 7 be formed in a half-phase shape, for example, as shown in FIG. 5, in order to ensure a smooth abutting relationship between the two slopes and to prevent them from separating.

Further, 9 is a hook portion which is engaged and connected to the elevator C of the lift car B.

[Effect]

As shown in Fig. 8, hook part 9 of pallet carrier A is engaged and connected to elevator C of lift car B, and lift car B
Fork 2 of pallet carrier A due to the movement of
is inserted into the bottom space of the loaded pallet in the state shown in Figure 3, and the hydraulic cylinder 3 of the pallet carrier A is operated by remote control from the lift vehicle B, and its piston rod 9 is pulled to the left in the figure. and,
The fork member 5 is pulled to the left, and the slope 7 provided on the fork member 5 slides on the slope 6 provided on the chassis frame 4, so that the fork member 5 rises obliquely while maintaining a horizontal state. Then, the loaded pallet is floated to the conveying state.

On the other hand, by pushing the hydraulic cylinder 3 back to the right in the figure, the slope 7 of the fork member 5 slides on the slope 6 of the chassis frame 4 and returns to the state shown in Figure 3, that is, the fork member 5 is returned to its original position and lowered. It is.

〔Effect of the invention〕

As described above, according to the present invention, slopes are provided on the chassis frame and the fork member constituting the pallet transport vehicle, and a means is adopted in which the slopes are slidably abutted against each other, thereby keeping the fork member in a horizontal state. As shown in Fig. 10, the load is raised and lowered in a diagonal manner to prevent the loads from catching on each other when floating, and to lower the load so that it naturally contacts the neighboring load without straining when it floats down. can be made possible.

Furthermore, since the above-mentioned slopes butt against each other, it is possible to reduce the height above the ground when the fork member is raised as low as possible, which has excellent features that cannot be expected with conventional pallet transport vehicles. It is.

[Brief explanation of drawings]

Fig. 1 is a slope view of the pallet transport vehicle, Fig. 2 is an enlarged partially cutaway plan view of the main parts of the above, Fig. 3 is a partially cutaway side view of the fork member in the lowered state, and Fig. 4 is a partially cutaway side view of the fork member. FIG. 5 is a perspective view of a modified example of the slope portion; FIG. 6 is a side view showing the fork member of the conventional pallet transport vehicle in the lowered state; FIG. 7 is the same fork member as above. FIG. 8 is an explanatory diagram of the state in which the pallet carrier is connected to a lift vehicle, FIG. 9 is an explanatory diagram showing the raising and lowering direction of the conventional fork member, and FIG. 10 is the fork of the present invention. It is an explanatory view showing the direction of elevation of members. 3... Driving means (hydraulic cylinder), 4... Chassis frame, 4... Wheels, 5... Fork member, 6, 7... Slope.

Claims (1)

[Claims] 1. In a pallet transport vehicle of a type in which a fork member is supported on a chassis frame equipped with wheels so that it can be raised and lowered while maintaining a substantially horizontal state, the supporting means comprises:
The chassis frame and the fork member are each provided with a slope, and the two slopes abut against each other, and the fork member is connected to a driving means for sliding the slope of the member against the slope of the chassis frame. The feature is a fork-shaped pallet transport vehicle that is connected to a lift vehicle.