JPS62220477A - Cargo-handling method of bottom-hopper container - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cargo handling method using an open bottom container, and more particularly to a cargo handling method using a combination of a bottom open container and an inclined pallet.

[Conventional method]

BACKGROUND ART Various cargo handling equipment and carriers have been used to streamline operations such as loading and unloading, transporting, and storing cargo. Valetization systems that use wooden or silver pallets and forklift trucks, or sheet pallets (also called slipsheets) and push-pull forklift trucks, are widely used.

Furthermore, there are various types of conveyors suitable for so-called unit loads, which handle small loads as one unit. For example, there are box-shaped containers made of wood or steel, and various flexible conveyance devices made of cloth or plastic sheets have been proposed. Examples of flexible conveyance tools include a motsuko type (Utility Model No. 57-21559) and a packing and transportation tool (Utility Model No. 56-38061) that combines multiple pieces of baggage into a single strap-like piece by combining strip-shaped materials. (No.) and a flexible container (Jitsukaiaki!), which is made by combining sheet materials into a box shape to store cargo, and when unpacking, the fabric opens from the center to both sides.
No. 58-151596) (Unexamined Japanese Patent Publication No. 59-15067)
Furthermore, a split sheet type conveyor that completely divides the sheet material into two parts when unloading (Utility Model Application No. 60-126359)
etc. are disclosed.

An example of the bottom-open container described above is shown in FIG.

FIG. 2(a) shows the container unfolded before loading. A left-right symmetrical hanging belt 1 with openings 4 facing each other,
A base body 13 having an unloading belt 2 is the main part of the structure, and the rectangular base body 13 is functionally divided into a bottom face 5 which forms the bottom when cargo is placed and a side face 7 which covers the sides. Furthermore, the base body is usually provided with a tightening strap 9, which is connected to the upper side of the load when the cargo is placed thereon, and ensures the retention of the load. Figure 2(b) shows cargo 11 placed in the above-mentioned container and 2 facing each other.
This is a perspective view of one pair of hanging belts being lifted up by one hook 10, and the container is moved by being lifted up via the hanging belt 1 with the hook of a crane or the fork of a forklift. In the case of unloading, the pair of unloading belts 2 are hung on, for example, the hook of a crane or the fork of a forklift, and pulled upward. In this way, the load of the cargo generates a force that opens the opening, and the container can be separated from the left and right sides of the opening and unloaded at a predetermined location.

The base of such bottom-opening containers is usually made of flexible and strong loss or sheet, and is lightweight and foldable, making it convenient for transporting and storing before and after use.
This method is used when transporting individual packages (paper bags or cartons) weighing between 1 and 40 kg as a unit load.

However, if the top and bottom surfaces of the individual packages are close to square, or if the stacking method is such that the overlapping area of the individual packages is extremely small, When the container is lifted, the bottom of the container bends downward due to the load of the cargo itself, as shown in Figure 2(b), and the individual packaging is subjected to stress toward the center of the container. When the high that has been stressed in this manner is released, the stress is relieved upon landing, and a phenomenon of high cracking occurs as shown in FIG. 2(C). This phenomenon makes cargo handling work dangerous and reduces work efficiency.

[Problem that the invention seeks to solve]

The object of the present invention is to use a bottom-opening container as described above,
To provide a cargo handling method capable of maintaining a stable state of cargo after landing without causing the cargo to crack into 7-4 pieces.

[Means for solving problems]

The present invention is a cargo handling method characterized in that a bottom-opening container is used in combination with an inclined pallet having a surface with a pair of opposing edges also sloping downwardly toward the center.

The pallet of the present invention will be explained using the drawings.

FIG. 1(a) shows that the cargo on the container, which has deflected downward during lifting as shown in FIG. 2(b), lands on the pallet 15 of the present invention, and the front side of the cargo is FIG. 7 is a diagram showing the state of the cargo after the container whose rear surface was covered with its side surface 7 was pulled out. The pallet of the present invention has surfaces with identical downward slopes from a pair of opposing edges 14 toward the center, as shown in detail in FIG. 1(b) or (C). Since this sloping surface retains the downward deflection energy contained in the cargo without releasing it, the above-mentioned high crack as shown in FIG. 2(c) does not occur.

The slope of the pallet surface includes a pair of edges and a plane including a center line equidistant from the pair of edges on the pallet surface;
It is preferable that the angle θ formed with the bottom surface (landing surface) of the pallet is 5° to 1°.

If the inclination is less than 5°, it is insufficient to prevent cracks and cracks, and if it exceeds 15°, the inclination is too steep and will put stress on the cargo, which is not preferable. A more preferable inclination is 7° to 10°, and within this range it is possible to achieve a stable no-y shape, and it is also a moderate angle that can be commonly used for general cargo handling work performed with flat pallets.

Furthermore, as shown in FIG. 1(c) K, the pallet of the present invention has an edge height that satisfies the above conditions, and a flat part parallel to the bottom surface is provided in the center of the surface of the pallet. , and may have surfaces on both sides thereof that slope upward toward the edges.In this case, the angle between the sloped surface of the pallet surface and the flat surface is preferably 8° to 1f.

〔Effect of the invention〕

According to the present invention, when transporting a large number of individual packages as a unit load using a conventional open-bottom container,
There is no cracking phenomenon when landing due to deflection.

Therefore, safe and efficient cargo handling can be performed.

[Brief explanation of drawings]

FIG. 1(a) is a diagram showing the state after the cargo transported on the pallet has been landed on the pallet and the container has been removed by the method of the present invention, and FIGS. 1(b) and (c) are FIG. Figure 2 is a diagram for explaining the occurrence of high cracks when landing, and Figure 2 (a) is a developed view of a bottom-open container, Figure 2 (b) is a perspective view showing the state when the container is lifted, and Figure 2 (c) is an exploded view of the bottom-open container. ) is a diagram showing a state of high cracking. 1...Hanging belt, 2...Back removal belt), 4.
...opening, 5...bottom, 7.
...Side, 9...Tightening belt, 10
...Friday, 11...Cargo, 1
2... Landing platform, 13... Base, 14... Edge, 15... Pa
Yes. Figure 2

Claims (1)

[Claims] 1. Cargo handling of an open-bottom container, characterized in that the open-bottom container is used in combination with an inclined pallet having a surface that has the same downward slope from a pair of opposing edges toward the center. Method. 2. The cargo handling method for an open-bottom container according to claim 1, wherein the tilt angle of the tilted pallet is in the range of 5° to 15°.