JPH03295730A - Cargo handling device - Google Patents

Abstract

PURPOSE:To secure the efficiency and safety of the cargo handling work and make a device compact by allowing an auxiliary cargo receiving base supported on the free end section of a main cargo receiving base via a link mechanism to function as part of a lift cargo receiving base and a cargo drop preventing stopper and to contribute in shortening the height when the cargo receiving base is stored. CONSTITUTION:A cargo receiving base 2 is supported on the cargo handling base of a cargo handling vehicle V via a lift mechanism 3. A main cargo receiving base 12 supported on the lift member 5 of the lift mechanism 3 and an auxiliary cargo receiving base 13 supported on its free end section via a link mechanism 14 are provided on the cargo receiving base 2 in this cargo handling device. A link 22 with the preset length, a pivotal connection P1 section pivotally connecting one end of it to the main cargo receiving base 12, and the other pivotal connection P2 section pivotally connecting the other end to the auxiliary cargo receiving base 13 are provided on the link mechanism 14 so that the auxiliary cargo receiving base 13 can be located at the specific first position A and the second position B.

Description

[Detailed Description of the Invention] A0 Object of the Invention (1) Industrial Application Field The present invention provides a loading platform that can be raised and lowered while maintaining a substantially horizontal state and is stored in a substantially vertical folded position. The present invention relates to a cargo handling device equipped with the following.

(2) Conventional technology A cargo handling platform such as a cargo handling vehicle and a cargo receiving platform supported by the cargo handling platform via an elevating mechanism are provided, and the cargo receiving platform is operated to raise and lower while maintaining a substantially horizontal state by the elevating mechanism. being on the ground and
A cargo handling device that loads and unloads cargo between the cargo handling platforms and is stored in a substantially vertical folded position when not carrying out cargo handling operations is well known (Japanese Patent Laid-Open No. 57-33
195, JP-A-55-145034, JP-A-56-138031).

(3) Problems to be Solved by the Invention By the way, the above-mentioned Japanese Patent Application Laid-Open No. 57-33195 and Japanese Patent Application Laid-Open No. 55-145034 have a storage bar on the cargo receiving platform to prevent the cargo from falling thereon. In the case of Japanese Patent Application Laid-Open No. 56-138031, the loading platform is composed of a main loading platform and an auxiliary loading platform, and the auxiliary loading platform functions as a cargo stopper.
The former is not equipped with an auxiliary loading platform of which the loading platform is a part, and the latter is equipped with an auxiliary loading platform, which is in an extended state even when the loading platform is stored. There is a problem with obstructing the view of the surrounding area.

The present invention has been made in view of the above circumstances, and includes a main cargo receiving platform and an auxiliary cargo receiving platform, and the auxiliary receiving platform functions as a guide member during loading and unloading of cargo and as a stopper member for the cargo. Moreover, it is an object of the present invention to provide a novel cargo handling device in which the cargo receiving platform is folded up when stored and does not obstruct the view of the surrounding area.

B0 Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention comprises a cargo handling platform such as a cargo handling vehicle, and a cargo receiving platform supported by the cargo handling platform via an elevating mechanism. In the cargo handling apparatus, the cargo receiving platform is operated to raise and lower while maintaining a substantially horizontal state by an elevating mechanism, and can be folded to a substantially vertical storage position, wherein the cargo receiving platform is a lifting member of the elevating mechanism. and an auxiliary loading platform supported via a link mechanism at the free end of the main loading platform, and the link mechanism is such that the auxiliary loading platform is connected to the main loading platform. a first position that engages the free end and forms a guide for the loading platform; a second position that overlaps the main loading platform to shorten the overall length of the loading platform and serves as a stop for the load on the main loading platform; a link of a predetermined length, a pivot connecting part that pivotally connects one end of the link to the main loading platform, and the other end of the link pivotally connecting to the auxiliary loading platform so that the link can assume the following positions. , and other pivot connections.

As the elevating mechanism, one in which the elevating member moves up and down vertically, one in which the elevating member moves up and down via a parallel link mechanism, and other conventionally known structures are used.

(2) Function According to the above configuration, the auxiliary loading platform constitutes a part of the loading platform and serves as a guide member during cargo handling operations, and also overlaps with the free end of the main loading platform to prevent the cargo from falling. It acts as a stopper for the main cargo bed, and also overlaps the free end of the main cargo bed to help reduce the storage height of the main cargo bed.

(3) Embodiments Hereinafter, embodiments in which the present invention apparatus is implemented in a cargo handling vehicle will be described with reference to the drawings.

Figures 1 to 3 show a cargo handling vehicle equipped with the cargo handling device of the present invention.
A partially cutaway side view is shown. In these figures, a pair of guide columns 1 are erected at the left and right corners of the rear end of the cargo handling vehicle V, and these guide columns 1 are equipped with a lifting mechanism 3 for raising and lowering the cargo receiving platform 2. provided. This elevating mechanism 3 is a conventionally known one, so its structure will be briefly explained. In the guide path 4 provided in the guide column 1, an elevating member 5 is provided.
is engaged via upper and lower guide wheels 6.7 provided therein so as to be able to move up and down. One end of a wire rope 8 is tied to the lifting member 5, and this wire rope 8 is connected to a hydraulic cylinder, winch, etc. (not shown) via guide pulleys 9 and 10 pivotally supported at the upper and lower parts of the guide column 1. connected to a drive device. Accordingly, the wire rope 8 is pulled or relaxed by the operation of the drive device, and the elevating member 5 connected thereto is moved up and down along the guide path 4.

Brackets 11 are fixedly installed at the bottom of the left and right lifting members 5, respectively, and the loading platform 2 is mounted on the brackets 11 in a substantially horizontal extended position as shown in FIG. 1 and in a substantially vertical retracted position as shown in FIG. It is supported so that it can rotate up and down so that it can maintain its position.

The loading platform 2 is composed of a main loading platform 12 and an auxiliary loading platform 13 connected and supported to the free end of the main loading platform 12 via a link mechanism 14. The main loading platform 12 is the main part of the loading platform 2, and is formed into a rectangular plate shape, with a pair of support shafts 15 horizontally attached to the left and right base ends of the loading platform 12, as shown in FIG. 4.5. These support shafts 15 are pivotally supported by the bracket 11 so as to be vertically rotatable. A retaining piece 16 is integrally extended at the base end of the main loading platform 12.
is a stopper 17 integrally provided at the base end of the elevating member 5;
and is held in a substantially horizontal extended position as shown in FIG. 1.2.

The auxiliary loading platform 13 is formed in the shape of a horizontally long plate having the same width as the main loading loading platform 12, and has a guide surface 18 formed of a downwardly inclined surface on its upper surface.

The auxiliary loading platform 13 is rotatably and reversibly connected to the free end of the main loading platform 12 via a link mechanism 14 . That is, as shown in FIGS. 4 to 7, a pair of brackets 20 are provided on both left and right sides of the free end of the main loading platform 12 and project upwardly. is a pivot connection PI, and this link 2
2 is vertically rotatable around the pivot shaft 21. Further, the base end of the auxiliary load receiving stand 13 is pivotally connected P8 to the tip of the link 22 with another pivot 23, and this auxiliary load receiving stand 1
3 is vertically rotatable around the pivot shaft 23. As shown in FIG. 4, the auxiliary loading platform 13
When in the first position (A) forming the zero guide, one pivot connection P! The section is located below the other pivot connection 20, and the auxiliary loading platform 13 engages the free edge of the main loading platform with its front surface due to its own weight.

Pin holes 24 and 25 are drilled in the intermediate portions of the auxiliary loading platform 13 and the link 22, respectively.
By inserting the insertion pins 26 (Fig. 6.7) into the bin holes 24.25, which are equidistant from the pivot connection 22, the auxiliary cargo receiving stand 13 can be moved to the second bin 25, as will be described later. Third
position (B).

(C).

Next, the operation of this embodiment will be explained. First, the cargo handling device is activated to move the cargo W between the ground and the floor surface 27 of the cargo handling vehicle ■.
To explain the case of loading and unloading, move the auxiliary loading platform 13 outward with the main loading platform 12 extended approximately horizontally, and move it to the first position (which becomes the guide part of the main loading platform 12). A), and then when the drive device (not shown) is set in a free state, the elevating member 5 is lowered together with the load receiving platform 2 by its own weight, and they are grounded on the ground as shown in FIG.

In this way, the cart 29 with casters 28 on which the cargo W is placed is run and rides on the cargo receiving platform 2. At this time, the guide surface 18 of the auxiliary load receiving platform 130 is formed as a downwardly inclined surface, thereby making it easier for the cart 29 to ride onto the load receiving platform 2.

Next, the link 22 is rotated counterclockwise around the pivot connection P in FIG. When the auxiliary loading platform 13 is moved parallel to the main loading platform 12 by its own weight, as shown by the solid line in FIG. In this case, by inserting the insertion pins 26 into the matching pin holes 24 and 25 as necessary, the auxiliary cargo receiving platform 13 is locked in the overlapping position.In this state, the base end of the auxiliary cargo receiving platform 13
It engages with the casters 28 of the container to prevent its outward movement, thereby preventing the cargo from falling.

Next, the wire rope 8 is actuated by a drive device (not shown).
, the elevating member 5 rises along the guide path 4,
When the receiving surface of the receiving platform 2 becomes flush with the floor surface 27 of the vehicle (2), the ascent thereof is stopped, and the cargo W can be loaded into the vehicle V.

Further, when unloading the cargo W from the vehicle V to the ground, the above-described operation is performed in reverse.

When the cargo loading/unloading operation is completed, the cargo receiving platform 2 is rotated to a substantially vertical position, folded into a storage position, and locked in that position by the operation of a suitable locking device.

By the way, when storing the loading platform 2 as mentioned above,
The auxiliary loading platform 18 is moved to the second position (B) as shown in FIG.
), or by rotating the auxiliary load receiving platform 18 upwards together with the link 22 around the pivot connection P, as shown by the chain line in FIG. It is inverted and superimposed on the main loading platform 12 with its inclined guide surface 18 facing down.

Then insert the bottles 26 into the matching bottle holes 24 and 25.
The auxiliary loading platform 18 is locked in the third position (C) by inserting the auxiliary loading platform 13 into the second position (B) or the third position (C). 2, the height of the storage position can be lowered and the surrounding visibility is improved.

C0 Effects of the Invention As described above, according to the present invention, in the cargo handling device, the cargo receiving platform includes a main cargo receiving platform supported by the elevating member of the elevating mechanism;
An auxiliary loading platform is supported at the free end of the main loading platform via a link mechanism, and the link mechanism is configured such that the auxiliary loading platform engages with the free end of the main loading platform and is connected to the loading platform. a link of a predetermined length, and a link of a predetermined length so as to be able to assume a first position forming a guide portion of the main cargo receiving platform and a second position overlapping the main cargo receiving platform and serving as a stopper for the cargo on the main cargo receiving platform. The auxiliary cargo receiving platform is equipped with a pivot connecting portion that pivotally connects one end of the link to the main cargo receiving platform and another pivot connecting portion that pivotally connects the other end of the link to the auxiliary cargo receiving platform. Not only can it function as a part of the lifting platform and a stopper to prevent the cargo from falling (when the loading platform is retracted, it can contribute to shortening its height, improving the efficiency and safety of cargo handling operations). It is possible to achieve security and make the device more compact.In addition, the number of parts is small (it can be provided at a low price).

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 is a side view of the cargo handling device when the loading platform is extended and touches the ground, Fig. 2 is a side view of the cargo handling device during its extension and descent, and Fig. 3 is a side view of the cargo handling device when it is being retracted. FIG. 4 is a partially enlarged side view of the loading platform when the auxiliary loading platform is extended, FIG. 5 is a view taken along the line V-V, and FIG. Enlarged side view of part of the loading platform when superimposed on the platform, No. 7
The figure is an enlarged side view of a part of the auxiliary loading platform when the auxiliary loading platform is inverted and superimposed on the main loading platform. (A)...first position, (B)...second position, (
C)...Third position, Pt, Pg"・Pivotal connection,■・
...Cargo handling vehicle 2...Cargo receiving platform, 3...Elevating mechanism, 5...Elevating and lowering member, 12...Main cargo receiving platform, 13...Auxiliary cargo receiving platform, 14.
... Link mechanism, 22... Link, 27... Floor surface 2nd figure 6 figure 4 figure 5

Claims (1)

[Claims] A cargo handling platform such as a cargo handling vehicle (V) and a lifting mechanism (
3), the cargo receiving platform (2) is moved up and down by the lifting mechanism (3) while maintaining a substantially horizontal state, and is placed in a substantially vertical storage position. In the cargo handling device that is foldable, the cargo receiving platform (
2) is a main loading platform (12) supported by the lifting member (5) of the lifting mechanism (3), and a link mechanism (14) supported by the free end of the main loading platform (12). Auxiliary loading platform (
13), and the link mechanism (14) is such that the auxiliary loading platform (13) engages with the free end of the main loading platform (12) to form a guide portion of the loading platform (2). First position (
A), the loading platform (2) is superimposed on the main loading platform (12).
A link (22) of a predetermined length and a link (2
2) a pivot connection (P_1) part that pivotally connects one end to the main cargo receiving platform (12), and another pivot part that pivotally connects the other end of the link (22) to the auxiliary cargo receiving platform (13). Support connection (P_2
) section.