JPH04328039A - Cargo handling vehicle - Google Patents

Abstract

PURPOSE:To safely perform cargo-handling work with no possibility of contact with a ceiling even in a room while preventing a load from collapsing and scattering at loading/unloading time by moving the load in vertical and longitudinal directions while maintaining the load in a horizontal condition. CONSTITUTION:An outrigger 14 and a load-carrying platform 13 are provided in a chassis frame 11, a guide rail 15 is laid along the load-carrying platform 13, a main pillar 16 is vertically provided in a front end part of the load- carrying platform 13, a multistep telescopic boom 17 comprising a base end boom 21, intermediate boom 22 and a top end boom 23 is pivotally supported to the main pillar 16, and a lift leg 30 guided by the guide rail 15 to longitudinally move is provided in the intermediate boom 22.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cargo handling vehicle capable of loading and unloading cargo such as containers in a horizontal state.

0002

2. Description of the Related Art As shown in FIG. 12, a cargo handling vehicle is constructed by interposing a cargo handling arm 4 between a chassis frame 3 and a cargo handling arm 4 and rotating the cargo handling arm 4 rearward by extending a hydraulic cylinder 6. The body 5 of
There is one in which the body 5 on the ground is loaded onto the chassis frame 3 by rotating the body 5 forward (see Japanese Patent Laid-Open No. 137225/1983).

However, such a cargo handling vehicle has a drawback that the cargo inside the body 5 is scattered because the body 5 is tilted during cargo handling. Therefore, in order to prevent the cargo from scattering during body cargo handling, cargo handling arms 4f and 4r are provided at the front and rear of the chassis frame 3 to form a parallel link, as shown in FIG. A vehicle capable of loading and unloading bodies has been proposed (
(See Japanese Patent Application Laid-Open No. 63-93642).

However, in a cargo handling vehicle using a parallel link mechanism, when loading and unloading, the body 5 moves in a high position along an arcuate trajectory. Therefore, when operating the cargo handling vehicle indoors, there is a risk that the body 5 may come into contact with the ceiling. Further, when the parallel link mechanism is used, the body 5 must be disposed inside the cargo handling arm 4r, which has the disadvantage that the width of the body 5 becomes narrow.

[0005]

SUMMARY OF THE INVENTION The present invention solves these problems in cargo handling vehicles by moving the cargo vertically and longitudinally while maintaining it in a horizontal state during loading and unloading. To provide a vehicle with a cargo handling vehicle that prevents cargo from collapsing or scattering and allows cargo handling to be carried out safely even indoors without the risk of contact with the ceiling.

[0006]

[Means for Solving the Problems] The cargo handling vehicle of the present invention has an outrigger and a loading platform provided on the chassis frame, a guide rail is laid in the longitudinal direction along the loading platform, and a main pillar is provided at the front end of the loading platform. The base of a multi-stage telescopic boom, in which a proximal boom, an intermediate boom, and a tip boom are telescopically fitted, is pivoted to the upper end of this main column, and the base of the intermediate boom is guided by a guide rail. The above problem is solved by providing lifting legs that move back and forth.

[0007]

[Operation] When loading a cargo, the cargo handling vehicle is stopped in front of the cargo, the outriggers are extended and grounded to ensure vehicle stability, and the multi-stage telescoping boom is extended rearward. As the multi-stage telescoping boom extends, the elevating legs are guided by the guide rails and move to the rear of the loading platform. Then, the lifting legs are retracted, the sling rope attached to the cargo is hooked onto the tip of the boom, and the lifting legs are extended to lift the cargo upward. When the multi-stage telescopic boom is retracted in this state, the lifting legs are guided by the guide rails and move to the front of the loading platform, so the cargo moves horizontally onto the loading platform. Then, shorten the lifting legs a little and let the cargo land on the loading platform.
After securing it to the cargo platform, the outriggers are pulled in and the cargo handling vehicle is driven.

When unloading a cargo, the cargo handling vehicle is stopped at a predetermined location, the outriggers are extended and grounded to ensure stability of the vehicle, and then the unloading is performed in the reverse order to the above.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view of a cargo handling vehicle which is an embodiment of the present invention, and FIG. 2 is a rear view thereof. In this embodiment, the cargo handling vehicle 10 includes a cab 12 at the front of a chassis frame 11, a loading platform 13 at the rear thereof, and outriggers 14 at the front and rear of the chassis frame 11. Loading platform 1
Guide rails 15 are laid along both left and right sides of the loading platform 13, and a main pillar 16 is erected at the front end of the loading platform 13. The base of a multistage telescopic boom 17 is pivotally supported at the upper end of this main column 16 by a pin 18.

As shown in FIG. 3, the multi-stage telescopic boom 17 has a proximal boom 21, a first intermediate boom 22, a second intermediate boom 23, and a tip boom 24 slidably fitted in this order. A first cylinder 25 is installed between the first intermediate boom 22 and a third cylinder 27 is installed between the second cylinder 26 and the tip boom 24 between the first cylinder and the second intermediate boom 23. The cylinders 25, 26, and 27 can be expanded and contracted by expanding and contracting them sequentially or simultaneously. At the tip of the tip boom 24 of the multi-stage telescopic boom 17, an arm 20 and a hook 29 are provided that protrude laterally for hanging a sling rope 28. In this embodiment, the tip boom 24 is located outside the intermediate booms 22 and 23, so the cargo is transferred to the tip boom 2.
Even if it comes into contact with 4, it will not interfere with the expansion and contraction operation.

[0011] At the base of the second intermediate boom 23, lifting legs 3 are provided.
0 is set. As shown in FIG. 4, the elevating legs 30 include an upper leg 31 fixed to the lower surface of the second intermediate boom 23 and a lower leg 33 erected on a base 32, which are slidably fitted together. An elevating cylinder 34 is attached between the lower leg 33 and the multi-stage telescopic boom 17 can be raised or lowered by expanding and contracting the elevating cylinder 34. Guide rollers 35 that engage with the guide rails 15 are provided at both left and right ends of the base 32.
is attached, and when the multi-stage telescopic boom 17 expands and contracts, the elevating legs 30 are guided by the guide rails 15 and move rearward and forward.

When loading the container 36 as cargo,
As shown in FIG. 5, the cargo handling vehicle 10 is stopped in front of the container 36, the outriggers 14 are extended and fixed to the ground 37 to ensure the stability of the vehicle, and then the multi-stage telescopic boom 17 is extended rearward. As the multi-stage telescopic boom extends, the elevating legs 30 are guided by the guide rails 15 and move to the rear of the loading platform 13. Then, the lifting legs 30 are retracted and the sling rope 28 attached to the container 36 is hung on the hook 29 of the tip boom 24. Then, the lifting legs 30 are extended to lift the container 36 as shown in FIG. 6, and in this state, the multi-stage telescopic boom 17 is contracted. Then, the lifting legs 30 are guided by the guide rails 15 and move to the front of the loading platform 13, so that the container 36 moves horizontally onto the loading platform 13. When the elevating legs 30 move to the front end as shown in FIG. 1, the elevating legs 30 are slightly retracted, the container 36 is landed and fixed on the loading platform 13, and then the outriggers 14 are retracted and the cargo handling vehicle 10 is driven.

When unloading the container 36, the cargo handling vehicle 10 is grounded at a predetermined location to ensure stability, and then unloading is performed in the reverse order to the above. FIG. 7 shows an example in which a drum 38 is loaded onto the cargo handling vehicle 10 as cargo.

FIG. 8 shows another embodiment of the multi-stage telescopic boom 17. In this embodiment, contrary to the case of FIG. 3, the cross-sectional area of the proximal boom 21 is large, and the first intermediate boom 22
, second intermediate boom 23, and tip boom 24 are sequentially inserted inside, and the elevating leg 30 is attached to a box 38 into which the proximal boom 21 can be inserted.

FIGS. 9 and 10 show other embodiments in which the guide rails 15 are arranged differently. In the embodiment shown in FIG. 9, the guide rail 15 is placed closer to the center of the loading platform 13 than in the case shown in FIG. . Further, in the embodiment of FIG. 10, the guide rail 15 is
The guide rollers 35 are installed on the lower surfaces of both left and right ends of the base 32 facing inward.

FIG. 11 shows an embodiment in which the entire length of the loading platform 13 is short and the multi-stage telescopic boom 17 includes only one intermediate boom.

[0017]

[Effects of the Invention] As explained above, the cargo handling vehicle of the present invention maintains the cargo in a horizontal state during loading and unloading.
By moving the cargo in the vertical and longitudinal directions, it is possible to prevent the cargo from collapsing or scattering, and to carry out cargo handling operations safely even indoors without the risk of contact with the ceiling. Further, a cargo handling vehicle can be easily constructed by simply providing an outrigger, a loading platform, a guide rail, a main column, a multi-stage telescoping boom, and a lifting leg on the chassis frame of an ordinary truck.

[Brief explanation of drawings]

FIG. 1 is a side view of a cargo handling vehicle that is an embodiment of the present invention.

FIG. 2 is a rear view of the cargo handling vehicle of FIG. 1.

FIG. 3 is a longitudinal sectional view showing the multi-stage telescopic boom in an extended state.

FIG. 4 is a longitudinal cross-sectional view showing a reduced state of the elevating legs.

FIG. 5 is an explanatory diagram of cargo handling work.

FIG. 6 is an explanatory diagram of cargo handling work.

FIG. 7 is an explanatory diagram of a loaded state.

FIG. 8 is a longitudinal section of another embodiment of a multi-stage telescopic boom.

FIG. 9 is an explanatory diagram showing an example of guide rail arrangement.

FIG. 10 is an explanatory diagram showing another arrangement example of guide rails.

FIG. 11 is a side view of a cargo handling vehicle according to another embodiment of the invention.

FIG. 12 is a side view of a conventional cargo handling vehicle that rotates a cargo handling arm rearward.

FIG. 13 is a side view of a conventional cargo handling vehicle in which a parallel link is configured on the cargo handling arm.

[Explanation of symbols]

10 Cargo handling vehicle 11 Chassis frame 13 Loading platform 14 Outrigger 15 Guide rail 16 Main pillar 17 Multi-stage telescopic boom 21 Base end boom 22 First intermediate boom 23 Second intermediate boom 24 Tip boom 30 Lifting legs

Claims (1)

[Claims] Claim 1: A chassis frame is provided with an outrigger and a loading platform, a guide rail is laid in the longitudinal direction along the cargo handling vehicle, a main pillar is erected at the front end of the loading platform, and an upper end of the main pillar is provided with a main pillar. , a base of a multistage telescopic boom in which a proximal boom, an intermediate boom, and a tip boom are telescopically fitted is pivotally supported, and elevating legs are provided at the base of the intermediate boom to move back and forth while being guided by the guide rail. A cargo handling vehicle.