JPH0380720B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to cargo handling vehicles such as container loaders and pallet loaders used for carrying cargo into and out of aircraft.

"Prior Art" In general, cargo handling vehicles such as container loaders or pallet loaders are used in cargo handling operations such as loading cargo onto an aircraft and removing cargo from an aircraft.

6 and 7 show an example of this type of container loader, with FIG. 6 being a side view and FIG. 7 being a plan view.

In the figure, reference numeral 1 is a traveling truck, and 2 and 3 are a main platform and a bridge platform provided on the truck 1. The main platform 2 and the bridge platform 3 are attached to the traveling carriage 1 via scissor links 6 and 7 which are operated by hydraulic cylinders 4 and 5 to bend and extend, respectively. As shown by the dotted chain lines, each can be raised and lowered independently.

On the upper surface of each of the platforms 2 and 3, there is a seventh
As shown in the figure, transfer rollers 8 and rollers 9 for sequentially transferring containers are arranged side by side in the front-rear direction, and constitute a cargo conveyance path. Furthermore, guide rails 10 for preventing cargo from falling are arranged on both sides of the transport path in parallel with the transport path.

Each of these guide rails 10... is equipped with a plurality of fixing pins (not visible in the figure) at the lower end, and these fixing pins are inserted into sockets (not visible in the figure) provided on the top surfaces of the platforms 2 and 3. In some cases, it is removably fixed. On the platforms 2 and 3, such sockets are arranged in a plurality of rows along the conveyance path, and one of these socket rows is selected and guided. By replacing the rails 10, the conveyance path width (the distance between the facing guide rails 10) can be changed. Note that 11 is a cockpit, which is movable in the width direction of the bridge platform 3 as indicated by the chain double-dashed line in the figure.

In order to load and unload containers using this container loader, as shown in FIG. 6, the container loader is first attached to the aircraft P and the platforms 2 and 3 are raised. Next, the transfer rollers 8 on the top surface of each platform 2, 3 are activated to transfer the container between the main platform 2 and the cargo hold of the aircraft A. At this time, if the width of the container C to be transferred is larger than the transfer path width, or conversely, if it is too small and there is a risk of it slipping off from the transfer rollers 8..., the worker should move each guide rail 10... to the socket row. Adjust the transfer path width accordingly.

``Problems to be Solved by the Invention'' By the way, in the above-mentioned guide rail 10...replacement work, it is first necessary to pull out the guide rail 10 from the socket, carry it to the next socket position, and insert it into the socket again. However, since the guide rail 10 is made of metal and is heavy, a great deal of labor is required for such replacement work, and in some cases, it may not even be possible to replace it by one worker, so labor saving is desired. . In addition, when carrying the guide rail 10, there is a risk of unsteady footing, and the platform 2, 3
The danger is high because of the high altitude. Furthermore, since it takes a considerable amount of time to replace all the guide rails 10, there is a drawback that the efficiency of container transfer work is reduced.

Furthermore, in order to make the above-mentioned replacement work easier to some extent, the guide rail 10 must be made as light as possible, and therefore the guide rail 10 must be made as light as possible.
There is also the problem that the strength of 0 cannot be sufficiently increased.

"Means for Solving the Problems" In the cargo handling vehicle of the present invention, the guide rail is connected to the transport path by a plurality of arms whose base ends are installed on the side of the transport path on the platform so as to be horizontally rotatable. The guide rail is supported so as to be movable in parallel in the width direction of the guard rail, and is provided with a guide rail fixing mechanism capable of detachably fixing the guide rail to the platform at at least two positions within the guardrail movement range. do.

"Embodiment" Hereinafter, main parts of a container loader (cargo handling vehicle) according to an embodiment of the present invention will be explained in detail using the drawings. Note that the same parts as in the conventional container loader are given the same reference numerals.

FIG. 1 is a plan view showing the guide rail moving mechanism of the container loader (corresponding to the part in frame A in FIG. 14 is a pair of arms having the same length and parallel to each other, each of which has one end connected to the frame 13, and 15 is a guide rail to which the other end of the arms 14 and 14 are connected. With this configuration, the guide rail 15 can be moved in parallel in the width direction of the conveyance path as shown by the two-dot chain line in the figure.

Next, details will be explained with reference to FIGS. 2 to 5.

FIG. 2 is a side sectional view (--line sectional view) showing a connecting portion between the frame 13 and the arm 14. As shown in FIG. An arm mounting shaft 16 is mounted upright on the frame 13, and the arm 14 has a hole 17 formed at one end thereof connected to the arm mounting shaft 16.
It is penetratingly supported and can be rotated horizontally. Further, a split pin 18 is inserted and fixed into the upper end of this arm attachment shaft 16 to prevent the arm 14 from coming off.

FIG. 3 is a side sectional view (--line sectional view) showing a connecting portion between the guide rail 15 and the arm 14. FIG. A rail mounting member 19 having a pair of horizontal plate parts 19a and 19b is welded to the back side of the guide rail 15, and the other end of the arm 14 is attached to a support shaft 20 between these plate parts 19a and 19b. The arm 14 is horizontally rotatable.

Further, an upright support pipe 21 is welded to the upper surface of the upper plate portion 19a of the rail mounting member 19, and the support pipe 21 is welded to the upper surface of the upper plate portion 19a of the rail mounting member 19.
A through hole is formed at a position corresponding to 1. In the support pipe 21, there is a guide rail 1.
A fixing pin 22 (main part of the guide rail fixing mechanism) for fixing the position of the guide rail fixing mechanism 5 is inserted so as to be movable up and down, and its lower end protrudes downward from the through hole of the lower plate part 19b. In addition, this fixing pin 22
A circlip 23 is fitted between the plate parts 19a and 19b at the lower part of the pin, and by being locked by the lower plate part 19b, the fixing pin 22 is prevented from falling out. There is. Furthermore, a washer 24 and a spring 25 are passed through the fixing pin 22, and this spring 25
The circlip 23 and fixing pin 22 are pushed down.

On the other hand, a rod-shaped lever 26 is fixed horizontally through the upper end of the fixing pin 22.
6 extends downward along a vertical groove 27 formed at the upper end of the support pipe 21. Then, by pulling up the lever 26 to the upper end of the support pipe 21 against the biasing force of the spring 25 and rotating it slightly, the lever 26 is moved as shown by the chain double-dashed line in FIG. is locked to the upper end of the support pipe 21, and the lower end of the fixing pin 22 is fixed to the mounting member 19.
It is designed to be held in a retracted state inside the.

Further, as shown in FIG. 3, a cylindrical pin fixing tube 28 is welded to the side surface of the frame 13 at a position where the lower end of the fixing pin 22 can reach. By penetrating, the guide rail 15 is fixed.

On the other hand, with the guide rail 15 moved in parallel by a predetermined distance (set according to the width of the container),
At the position where the lower end of the fixing pin 22 can reach, there is a pin fixing member 30 having a pin fixing hole 29, as shown in FIG.
is installed on platform 3.

Next, a method of using such a guide rail moving mechanism will be explained.

Assume that the guide rail 15 is now in the state shown by the solid line in FIG. 1 (ie, the state shown in FIG. 3). To move the guide rail 15 from this state to narrow the conveyance path width, first, one lever 26 of the guide rail 15 is pulled up to the upper end of the support pipe 21 and rotated a little. Then, the lever 26 is connected to the support pipe 21
The fixing pin 22 is locked at the upper end of the pin fixing cylinder 2.
Pulled out from 8. Next, by similarly operating the other lever 26 of the guide rail 15, the guide rail 15 is released and becomes able to move freely. Then guide rail 15
Move the fixing pin 22 to the position indicated by the two-dot chain line in Figure 1.
Align the position of each lever 2 with the pin fixing member 30.
6 to lower the fixing pin 22 along the groove 27 of the support pipe 21, and its lower end is inserted into the hole 29 of the pin fixing member 30 as shown in FIG. 5 to fix the guide rail 15. Also, platforms 2 and 3
A similar movement operation is performed for each guide rail 15 at other positions above to change the width of the conveyance path.

According to such a container loader, since the weight of the guide rail 15 is supported by each arm 14, 14, the labor required to move the guide rail 15 can be significantly reduced, and even with a heavy guide rail, the worker can easily move the guide rail 15. Can be easily moved by one person. Furthermore, since there is no need to carry heavy guide rails, the risk of unsteady footing can be reduced.

Furthermore, compared to replacing the guide rail, since the guide rail 15 is simply moved by operating the lever 26, the width of the guide rail can be changed within a short time, and the efficiency of container transfer work can be improved.

Furthermore, since the guide rail does not become difficult to move even if the weight of the guide rail is increased, there is an advantage that a guide rail with high strength can be used.

In addition, in the above embodiment, the parallel arms 14, 1
Although a manual guide rail moving mechanism using the 4 is adopted, the present invention is not limited to this, and a drive mechanism such as a hydraulic cylinder is attached to move all guide rails on the platform with a single button. You can do it like this.

"Effects of the Invention" According to the cargo handling vehicle of the present invention, the following effects can be obtained.

Since the weight of the guide rail is supported by the moving mechanism, the effort required to move the guide rail can be significantly reduced.

Since there is no need to carry heavy guide rails at dangerously high places underfoot, it is possible to reduce the risk of changing the conveyance path width.

Compared to the conventional work of replacing guide rails, the guide rail width can be changed in a shorter time, improving work efficiency.

Even if the weight of the guide rail is increased, the movement of the guide rail will not become difficult, so a guide rail with high strength can be used.

Since the guide rail is supported by a plurality of horizontally rotatable arms, the entire support mechanism can be made thinner, and the support position of the guide rail can be set sufficiently low as in the conventional device.

Since the center of rotation of the arm is set to the side of the conveyance path, the guide rail support mechanism is always located outside the conveyance path, so there is no risk of interference with the transported items, and the width of the conveyance path is maximized. Even when the platform is unfolded, the support mechanism does not protrude significantly outward from the platform, and there is no risk of interference with objects outside the vehicle.

[Brief explanation of drawings]

1 to 5 show the main parts of a cargo handling vehicle according to an embodiment of the present invention, FIG. 1 is a plan view of a guide rail moving mechanism, and FIG. 2 is a cross-sectional view taken along the - line of FIG. 1. , FIG. 3 is a - line sectional view, and FIG. 4 is a - line sectional view.
A sectional view taken along the line, and FIG. 5 is a sectional view taken along the - line.
6 and 7 show a conventional cargo handling vehicle, with FIG. 6 being a side view and FIG. 7 being a plan view. 1... Traveling trolley, 2... Main platform, 3
...Bridge platform, 15...Guide rail, 13...Frame, 14...Arm, 16...Arm support shaft, hereinafter referred to as guide rail fixing mechanism, 22...Fixing pin, 28...Pin fixing tube, 30...Pin fixing member .

Claims (1)

[Scope of Claims] 1. A cargo handling system in which a platform is provided on a traveling truck, a cargo transport path is formed on the upper surface of the platform, and a guide rail for preventing cargo from falling is arranged on the side of the transport path in parallel with the transport path. In the work vehicle, the guide rail is supported so as to be movable in parallel in the width direction of the conveyance path by a plurality of arms whose base end portions are installed on the platform at a side position of the conveyance path so as to be horizontally rotatable; A cargo handling vehicle characterized by being provided with a guide rail fixing mechanism capable of detachably fixing the guide rail to a platform at at least two or more positions within a guardrail movement range.