JPH0698996B2 - Bottom open container - Google Patents

Description

TECHNICAL FIELD The present invention relates to a bottom-opening type container. For more details,
The present invention relates to a bottom-open container that does not cause damage or collapse when unloading.

[Prior Art] Conventionally, various cargo-handling equipment and vehicles have been used in order to streamline operations such as loading, unloading, transfer, and storage of luggage. For example, a palletization system using a wooden or steel pallet and a fox lift truck, or a sheet pallet (also called a slip sheet) and a push-pull fox lift truck is widely adopted.

In addition, there are various types of transport tools suitable for so-called unit loading, which handles small loads integrally. For example, there are box containers made of wood or steel, and various flexible transport tools made of cloth or plastic sheets have been proposed. As a flexible carrier, a mocco type carrier (No. 57-21559, Kaikai) or a packing carrier that combines belt-shaped materials to integrate multiple loads into a string (No. 56-38061, Kai) Alternatively, a flexible container in which the sheet materials are combined in a box shape for loading and the bottom cloth is opened from the center to both sides when unloading (Actual No. 58-151596)
(Actual No. 59-15067), and a divided sheet type conveying tool that completely halves the sheet material when unloading (Actual No. Shokai)
60-126359) and the like are disclosed.

An example of the bottom open container is shown in FIG. FIG. 2 (a) is a diagram in which the container is expanded before loading.
A base body 3 having a hanging belt 1 and an unloading belt 2 which are symmetrical to each other with a connecting opening 4 abutting on each other is a main part of the configuration, and the rectangular base body 3 functionally has a bottom portion when a cargo is placed. Is divided into a bottom surface 5 that forms a side surface and a side surface 7 that covers a side portion. Further, the base body is usually provided with a tightening band 9 so that when the cargo is placed, it is joined on the upper side of the load to ensure the holding of the load. FIG. 2 (b) is a perspective view (fastening band omitted) when the cargo 11 is placed in the above-mentioned container, and the cargo handling work is carried out by lifting it with the hook of the crane or the fork of the forklift through the hanging belt 1. In the case of unloading, the pair of unloading belts 2 is hung on a hook of a crane, a fork of a forklift or the like and pulled upward. In this way, the load of the cargo produces a force to open the opening, and the connecting opening can be completely separated and unloaded to a predetermined place as shown in FIG. 2 (c).

However, in this case, the cargo bottom may be damaged by the friction between the cargo bottom and the container bottom, or the cargo collapses when handling a large number of individual units as a unit load, and depending on the direction of the force when pulling it upwards, the cargo side The same trouble occurs due to the friction between the inside of the container and
Alternatively, there are drawbacks such as damage to the stretch film wrapped to prevent the collapse of the load.

[Problems to be Solved by the Invention] An object of the present invention is to provide a bottom opening container which is free from damage or collapse of the load during unloading.

[Means for Solving Problems] The present invention is directed to a rectangular bottom portion 5 made of a flexible sheet material.
And at least a pair of side portions 7,7 'of a quadrangle made of a flexible sheet and connected to the side edges of the bottom portion 5. The bottom portion 5 and the pair of side portions 7,7' are formed in the center of the bottom portion. Has a connecting opening 4 that is parallel and equal in length to the edge of the bottom 5 to which is connected, and on the edge side of the bottom 5 that is orthogonal to this connecting opening 4,
A pair of suspension belts 1 are attached to both sides sandwiching the connection opening 4, respectively, and a bottom portion 5 and side portions 7, which are connected to the bottom portion 5,
7'includes side portions 7 and 7'starting from the connecting opening 4.
A pair of unloading belts 2 are attached so as to be orthogonal to the pair of hanging belts 1 toward the end side of the bottom portion 5 connected to the bottom portion 5, and the portion 5 ′ of the bottom portion 5 bisected by the connection opening portion 4 is provided. , 5 ″, the sides orthogonal to the connecting opening 4 have the same length A
In a bottom opening container in which the sides of the side portions 7 and 7 ′ orthogonal to the connection opening 4 have the same length C, the bottom portion 5 ′ and its adjacent side portions 7 and the bottom portion are 5 ″ and its adjacent side portion 7 ′ are integrally formed of the endless double sheets 6 which are overlapped with each other, and the length of the attachment portion of the unloading belt 2 attached to the endless double sheet 6 The bottom open container is characterized in that the length D is shorter than A + C.

The present invention will be described in detail with reference to the drawings. FIG. 1 (a) is a diagram in which a container of an example of the present invention is developed before loading. FIG. 2 (a) shown as a development view of a conventional container
However, there is a characteristic difference in the configuration of the portion corresponding to the base body 3 in FIG. 2A and the attachment of the unloading belt.

That is, the portions corresponding to the base 3 are the portions 5'and 5 "forming the bottom surface and the portions 7 and 7'which form the side surfaces adjacent to each other in FIG. 1 (a), and the bottom portion 5 '. , 5 "and sides 7 and 7'are symmetrical with respect to the connecting opening 4 which divides the bottom 5 into two, 5'and 7,5", respectively.
And 7'are integrally formed of overlapping endless double sheets.

The material of this sheet is a flat yarn woven fabric made of a polyolefin resin, a so-called turboline material obtained by coating polyethylene fiber woven fabric with vinyl chloride, or a nylon woven fabric, or a woven fabric made of a natural fiber material. Can be mentioned. In particular, the polyolefin-based flat yarn woven fabric is a strong material, has a moderate flexibility, and is mainly used as the industrial carrier, and is a preferable material.

According to the present invention, when the load is unloaded as described later, the endless sheets that are doubly overlapped are slid between each other to change the relative position at the contact between the load and the sheet. Since the separation between the container and the container is easily used, the frictional resistance between the sheets that are superposed on each other is smaller than the frictional resistance between the sheets and the load, that is, the sheets easily slip. It is necessary.

Further, the unloading belt 2 is fixed to the endless double sheet 6 as shown by the wavy line in FIG. That is, the length of the side of the bottom portion 5 divided into two parts 5 ', 5 "orthogonal to the connection opening is A, and the length of the sides of the side portions 7 and 7'also orthogonal to the connection opening is C. Then, the unloading belt 2 is fixed to the endless double sheet with a length D shorter than the length A + C starting from the connection opening.

[Operation and Effect] The loading of cargo by the container of the present invention and the movement of the container are essentially the same as those of the conventional container,
It produces a completely different effect when unloading and exerts its effect.

This will be described with reference to FIG. Considering as a model the case of unloading a load having a length of 2A placed at a target position with respect to the connection opening 4, a double sheet having the maximum frictional force between the load and the double sheet 6 is considered. Let F be the point on the cross section of
If the double sheet 6 is pulled by a force in the P direction for unloading, the frictional resistance between the inner surfaces of the superposed sheets of the doubled sheet is smaller than the frictional resistance with the load at F, and therefore the point F is Double sheet A + in P direction without moving
Only C-D can be easily moved, and the connection opening is A + C- on one side.
Only D can be opened. Therefore, if A + C-D is A or more, the opening of the opening becomes more than the length of the load, which is preferable.

Actually, the relative displacement between the load and the double sheet (opening of the opening) is not such a simple one, but A + C
With the free length of -D, the unloading is smoothly performed, and the state after the unloading is as shown in Fig. 1 (c).

As described above, when the cargo is unloaded, the shift of the cargo caused by the frictional force caused by the relative movement of the bottom surface of the cargo and the inner surface of the container (bottom cloth) which occurs in the conventional bottom opening container is eliminated by using the endless double sheet of the present invention. . Also, the damage to the cargo due to the friction with the container on the side of the cargo is completely eliminated by using the endless double sheet of the present invention. Therefore, the damage of the stillet film that has been conventionally wrapped to prevent the collapse of the load is eliminated. Furthermore, because the unloading is done smoothly,
The effect that the load does not collapse occurs.

[Brief description of drawings]

FIG. 1 shows an example of the container of the present invention. FIG. 1 (a) is an exploded view, FIG. 1 (b) is a side view of the main parts when the container is expanded, and FIG. It is a figure which shows the divided container. FIG. 2 shows an example of a conventional container.
FIG. 2A is a development view, FIG. 2B is a perspective view when a cargo is placed, and FIG. 2C is a perspective view showing a state after unloading. 1 ... Hanging belt, 2 ... Unloading belt, 3 ... Base, 4 ... Connection opening, 5 ... Bottom, 6 ... Endless double sheet, 7 ... Side, 9 ... Tightening band, 10 ... Fork, 11,12 …… Cargo 13 …… Hook

Claims (2)

[Claims] 1. A rectangular bottom portion 5 made of a flexible sheet material.
And at least a pair of side portions 7,7 'of a quadrangle made of a flexible sheet and connected to the side edges of the bottom portion 5. The bottom portion 5 and the pair of side portions 7,7' are formed in the center of the bottom portion. Has a connecting opening 4 that is parallel and equal in length to the edge of the bottom 5 to which is connected, and on the edge side of the bottom 5 that is orthogonal to this connecting opening 4,
A pair of suspension belts 1 are attached to both sides sandwiching the connection opening 4, respectively, and a bottom portion 5 and side portions 7, which are connected to the bottom portion 5,
7'includes side portions 7 and 7'starting from the connecting opening 4.
A pair of unloading belts 2 are attached so as to be orthogonal to the pair of hanging belts 1 toward the end side of the bottom portion 5 connected to the bottom portion 5, and the portion 5 ′ of the bottom portion 5 bisected by the connection opening portion 4 is provided. , 5 ″, the sides orthogonal to the connecting opening 4 have the same length A
In a bottom opening container in which the sides of the side portions 7 and 7 ′ orthogonal to the connection opening 4 have the same length C, the bottom portion 5 ′ and its adjacent side portions 7 and the bottom portion are 5 ″ and its adjacent side portion 7 ′ are integrally formed by overlapping endless double sheets 6, and the length of the attachment portion of the unloading belt 2 attached to the endrel double sheets 6 A bottom-opening container characterized in that D is shorter than A + C. 2. A bottom opening container according to claim 1, characterized in that said length (A + C) -D is not less than half the length of the bottom surface of the load to be unloaded.