JPS6011030Y2 - Forklift cargo handling equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cargo handling device for a forklift, and more specifically, the present invention is an improved cargo handling device that brings the load center position as close to the vehicle body as possible when an attachment is installed, thereby suppressing a reduction in allowable load. It is related to the device.

Generally, in a forklift, lift cylinders and cargo handling parts such as chains are arranged in the center of the left and right masts to raise and lower lifting members consisting of lift brackets, finger bars, etc. Therefore, the finger bars mentioned above are used as lift cylinders The structure is such that it is necessarily placed in front of the lift bracket to avoid interference with the lift bracket.

Therefore, when an attachment such as a crane arm, reach fork, or ram is attached to the finger par, the attachment will be placed in front of the mast. In the case of thicker attachments, the load center position moves closer to the vehicle body, resulting in a significant reduction in the permissible load of the forklift, as well as a decrease in the longitudinal stability of the vehicle, resulting in a significant drop in vehicle performance. There was a drawback.

The present invention has been made with the aim of eliminating the above-mentioned drawbacks of the conventional technology, and it has been developed by arranging the lift cylinder toward the rear or outside of the mast to form a considerable space between the left and right masses 1. , the finger par is fixed to the lift bracket placed in this space so that it is at a position recessed from the front of the lift bracket, and the attachment is fixed to the finger par at a position closer to the rear than the front of the lift bracket. The object of the present invention is to provide a cargo handling device for a forklift that can minimize movement of the load center position toward the front of the vehicle body when an attachment is attached to the finger bar.

Hereinafter, illustrated embodiments embodying the present invention will be described later.

First, the embodiment shown in FIGS. 1 to 4 will be described. In the figures, 1 indicates a pair of left and right masts consisting of an outer mast 1a and an inner mast 1b.
The upper ends of a are connected to each other by a flat cross beam la', the flat ends are connected to each other by a lower cross beam 1a'', and the lower ends are supported by the front end of the vehicle body 2 so as to be tiltable in the longitudinal force direction. Then, it is tilted back and forth by the tilt cylinder 3.

On the other hand, the inner masts 1b are connected at their upper ends and at their flat ends by an upper tie beam 1b' and a lower tie beam 1b'', respectively, and are vertically movable via lift rollers 4 on the outer mast 1a.

Two lift cylinders 6 for raising and lowering the elevating member 5 are arranged behind the left and right masts 1 (they can also be arranged outwardly), and are attached to the lower cross beam 1 of the outer mast 1a.
It is erected on top of a''.

The upper end of the piston rod 6a of the lift cylinder 6 is approximately U.
A chain wheel 8 is fixed to a letter-shaped wheel support 7, and is rotatably supported by the wheel support 7 via a support shaft 9. One end of the chain wheel 8 is fixed to the outer mast 1a and the other end is fixed to the elevating member 5. A lift chain 10 is attached.

Further, a substantially U-shaped receiver 11 fixed to the upper end of the inner mast 1b or the upper tie beam 1b' is slidably fitted onto the wheel support 7, and the side plate of this receiver 11 A vertically elongated guide groove 11a that engages with the support shaft 9 of the chain wheel 8 is formed, thereby giving the elevating member 5 a free lift determined by the length of the guide groove 11a. There is.

By arranging the lift cylinder 6, which is normally placed between the left and right masts 1, behind the mast 1 as described above, a considerably wide space 12 is formed between the left and right masts 1. , and an elevating member 5 is arranged in this space 12.

The lifting member 5 consists of a lift bracket 13 and a finger bar 14 fixed to the lift bracket 13, and the lift bracket 13 is rotatably supported on the upper and lower parts of the outer surface thereof, and is connected to the inner mast 1b via a foot roller 13a. It is raised and lowered by the lift cylinder 6 while being guided.

On the other hand, since there is no need to consider interference with the lift cylinder 6, the finger par 14 can be freely attached to the lift bracket 13 at a position recessed from the front surface of the lift bracket 13. As shown in the figure, a lift bracket 13 is fixed to the rear end surface of the lift bracket 13, and a crane arm 15 is attached to this finger bar 14 as an attachment via a hook-type arm carrier 16 as shown in the figure. There is.

In addition, when selecting the mounting position of the finger bar 14, it is necessary to consider interference with the lower tie beam 1b'' of the inner mast 1b.

This embodiment is constructed as described above, and therefore, by fixing the finger bar 14 to the rear end surface of the lift bracket 13, the crane arm 15 can be attached to the finger bar 14 while being moved toward the vehicle body 2 side. I can do it.

This means that the center of gravity of the lifting member 5 consisting of the lift bracket 13 and the finger par 14 and the center of gravity of the crane arm 15 move closer to the vehicle body 2, which means that the finger bar and attachments are not mounted on the front side of the mast as in the past. Since the load center position is closer to the vehicle body 2 side than in the case of an arrangement structure in which the This will improve the level of performance.

When the crane arm 15 is mounted closer to the vehicle body 2 and the load center position approaches the vehicle body 2, the protruding length of the crane arm 15, that is, the length from the front of the mast to the tip of the arm, is made relatively longer. This allows the crane arm 15 to have a wider base and hook 1.
7 is extremely advantageous in handling cargo.

Next, FIG. 5 shows the attachment attached to the finger par 14 from the crane arm 15 to the reach fork 1.
8.

As shown, the reach fork 18 is attached to the lift bracket 1.
The finger par 14 fixed to the rear end surface of the crane arm 3 is attached to the finger par 14 via a hook-on type mounting structure, that is, a hook-type fork carrier 19 similar to that of the crane arm 15 described above. Unlike the conventional model, the pantograph 20 when contracted can be stored at a position rearward from the front of the mast 1, that is, between both masts 1, and thereby the load center position can be brought closer to the vehicle body 2 side and the allowable load can be improved. I can do it.

In the case of this reach fork 18, the distance from the inside of the front tire to the front end surface of the guide rail that guides the expansion and contraction of the pantograph 20 can be reduced, so the forward field of view from the driver's seat can be improved compared to the conventional one. can be,
Furthermore, in the case of the reach fork 18, the fact that the lift cylinders 6 are arranged symmetrically in the left and right directions is useful for increasing the stability against uneven loads on the fork.

In addition, the above-mentioned crane arm 1 is used as an attachment.
The present invention is not limited to the two examples of 5 and reach fork 18, but can be applied to other shop ranges such as rams, pushers, push-pulls, rotary clamps, etc.

Next, other embodiments regarding the coupling structure between the lift bracket 13 and the finger bar 14 and the mounting structure of the attachment, which constitute the elevating member 5, will be described with reference to FIGS. 6 to 8.

In another embodiment shown in FIG. 6, the finger bar 14 is formed from two rods and is fixed to the upper and lower portions of the lift bracket 13 at approximately the middle portion in the longitudinal direction. A mounting plate 22 with a hook 22a at the upper end is fixed to the base, and a hook 22b can be fastened to the lower part of the mounting plate 22 with a bolt 23.The ram 21 connects the hook 22a at the upper end to the upper end. It is attached to the finger bar 14 by engaging the hook 22b with the finger bar 14 and the lower finger bar 14, and then tightening the hook 22b to the mounting plate 22 with the bolt 23.

In another embodiment shown in FIG. 7, a finger bar 14 with bolt holes 24 made of two plates is fixed to the upper and lower parts of the lift bracket 13, while a mounting having bolt holes 25 at the base of the ram 21 is provided. A block 26 is provided, and this mounting block 26 is stored between the upper and lower finger pars 14 (
After that, the ram 21 is attached to the finger bar 14 by tightening the bolts 23 using the bolt holes 24 and 25.

Furthermore, another embodiment shown in FIG. 8 is a slight modification of the embodiment shown in FIG. On the other hand, a recess 27 for engaging the finger bar 14 and a bolt hole 25 corresponding to the bolt hole 24 of the finger bar 14 are provided on the front and rear lower surfaces of the mounting block 26 provided at the base of the ram 21. After engaging the recess 27 with the finger bar 14, both bolt holes 24
, 25, the ram 21 is attached to the finger bar 14 by tightening bolts 23 to the finger bars 14.

Therefore, in any of the other embodiments described above, the finger bar 14 is located at a position rearward of the front surface of the lift bracket 13, and the mounting portion of the ram 21, which is an attachment, is also substantially located behind the front surface of the lift bracket 13. In the retreated position, the space 12 between the left and right masts 1
Therefore, as in the case of the above-described embodiment, it is possible to move the load center position closer to the vehicle body 2 side and suppress a reduction in the allowable load.

As detailed above, the present invention allows the finger bar in the elevating member and the attachment attached to it to be as close to the vehicle body as possible, so that the load center position is moved toward the front of the vehicle body when the attachment is attached. It is possible to improve the loading capacity and longitudinal stability of the vehicle by minimizing movement, and it also helps to improve the forward field of view from the driver's seat.

In particular, with the present invention, by fixing the finger bar in a position that is retracted from the lift bracket, it becomes easier to check the bottom of the foot beyond the finger bar, that is, the tip of the attachment.This improves the efficiency and safety of cargo handling operations. This is extremely effective in improving running performance.

In addition, the lifting member and the mounting portion of the attachment attached thereto can be stored in the space between the masts, which is advantageous in terms of preventing damage caused by collisions with handled cargo, etc.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention. Fig. 1 is a side view showing the entire forklift implementing the invention, Fig. 2 is a perspective view showing the main parts of the invention, and Fig. 3 is a front view. 4 is a half-sectional view, FIG. 5 is a side view of a forklift in which the crane arm is replaced with a reach fork, and FIGS. 6 to 8 are exploded perspective views showing other embodiments of the present invention. 1...Mast, 2...Vehicle body, 5...
...Lifting member, 6...Lift cylinder, 12
...Space part, 13-...Lift bracket, 14...Finger bar 15...
Crane arm, 18... Reach fork, 21... Ram.

Claims (1)

[Scope of utility model registration request] Two lift cylinders for raising and lowering the lift bracket are arranged behind or outside the mast that guides the raising and lowering movement of the lift bracket to form a space between the left and right masts, and the lift bracket placed in this space The finger bar is fixed so that its front end is set back from the front of the lift bracket, and the attachment is attached to the finger bar at a position closer to the rear than the front of the lift bracket. Device.