JP6587331B1 - Open top container - Google Patents

Abstract

The present invention provides an open top container that can increase the weight of scrap by reducing the weight of the container, lower the center of gravity of the container to increase the running stability of the trailer, and prevent fatigue destruction of the floor and walls. SOLUTION: In an open top container 10 having a floor panel ASSY 12, a front panel ASSY 13, a rear gate ASSY 14, left and right side panels ASSY 15 and 16, and loading scraps S, each floor panel 17, 17A, front panel 29, rear gate panel. 37. The left and right side panels 44 are formed of a wear-resistant steel plate having an elastic limit of 1000 to 2000 N / mm 2 and a Brinell hardness of 300 to 700 HBW, and the same material is used to reinforce the cross member 18, subframe 19, and front plate. The plate 30, the rear plate reinforcing plate 38, and the side plate reinforcing plates 45 were formed, and the cross member 18 and the subframe 19 were welded in a butted state. [Selection] Figure 1

Description

  The present invention relates to an open top container, and more particularly to an open top container that is mounted on a trailer and conveys industrial waste such as scrap.

A large amount of scrap is discharged from a scrap processing plant that crushes scrapped automobiles and building waste. When these scraps are carried out of the factory, they are transferred from a scrap yard to an open top container of a trailer for transporting waste using a rough terrain crane with a grapple or a magnet or a scrap loader.
A conventional open top container (hereinafter also referred to as a container) is configured by a box having a floor, a front wall, a rear wall, a pair of left and right side walls, and a ceiling portion, as shown in Patent Document 1, for example. Has been.

  Of these, the floor is a rectangular floor frame made up of a front rail, a rear rail and a pair of left and right side rails, each of which is long in the front-rear direction, and a horizontal root made of, for example, a plurality of square steel pipes at a predetermined pitch in the front-rear direction. Thick welds are welded in parallel, and vertical joists made of multiple square steel pipes are welded to the underside of each horizontal joist in a state of being spaced apart in parallel in the left-right direction. And a rectangular floor plate that is long in the front-rear direction is welded. In addition, when welding each vertical joist to the lower surface of each horizontal joist, it welds via many triangular-shaped welding piece materials.

The front wall is welded with a front plate made of wear-resistant steel plate to a substantially square front frame made up of the above-mentioned front rails made of ordinary steel, the front beams of the upper side, and a pair of left and right front side columns. The lattice-shaped front plate reinforcing plate is welded to the outer surface of the front plate.
Further, the rear wall is made of a steel plate made of wear-resistant steel, and is welded to a substantially square front frame made up of the rear rail, which is made of ordinary steel, the rear beam of the upper portion, and a pair of left and right front side columns. A grid-like reinforcing plate for a rear plate is welded to the outer surface of the rear plate.
Furthermore, the pair of left and right side walls are made of wear-resistant steel plates on a pair of left and right rectangular side frames that are long in the front-rear direction, each consisting of a normal steel front side rail, rear side rail, lower side rail, and upper side rail. A pair of left and right side plates are welded, and a plurality of vertically elongated inclined reinforcing plates (side plate reinforcing plates) are welded in parallel at a predetermined pitch in the front-rear direction to the outer surface of each side plate.

Japanese Patent No. 5898760

However, in the conventional open top container, the floor frame, the multiple horizontal joists, the vertical joists, the numerous weld pieces, the front frame, the rear frame, and the reinforcing plates each have a carbon content of 0. It was made of plain steel having a large specific gravity of 6 wt% or less. As a result, the weight of the open top container was increased, and the amount of scrap loaded was reduced accordingly.
In addition, the square pipe-shaped horizontal joists and vertical joists that support the floorboard are welded in a grid pattern up and down, so the center of gravity of the container is increased accordingly, and the trailer running stability during scrap transportation Had fallen.

  Furthermore, the above-mentioned ordinary steel as a material for the horizontal joists, vertical joists and the reinforcing plates is a relatively soft steel. As a result, in the container, the entire scrap is loaded while pressing downward, so that the center of each of the floor, front wall, rear wall and the pair of left and right side walls is pushed outward by the scrap to swell, plastic Deformation was easy to occur. The deformation of the center of these floors and walls was expanded by carrying scrap for a long time with a trailer, and as a result, the mechanical strength due to fatigue at the center of each wall etc. also decreased, and fatigue failure occurred. . That is, a minute crack was generated in the center of these floors and walls, and the crack was gradually increased by receiving repeated stress.

  Therefore, as a result of diligent research, the inventor has found not only floor boards, front boards, rear boards and a pair of left and right side boards, but also horizontal joists, vertical joists, front board reinforcement boards, rear board reinforcement boards and inclined reinforcement boards. As a result, if a wear-resistant steel plate with higher strength than conventional steel is used, the amount of material used can be reduced by reducing the amount of material used and the weight of the open top container can be reduced, and the amount of scrap loaded will increase accordingly. At the same time, it was found that fatigue failure of the floor, front wall, rear wall and each side wall can be prevented. Moreover, instead of welding the horizontal joist and vertical joist in two steps, as in the past, if the horizontal joist and the vertical joist are welded to each other (arranged at the same height), only that much. The present invention has been completed by finding that the center of gravity of the container is lowered and the traveling stability of the trailer for transporting waste during scrap transportation is also increased.

  This invention can reduce the weight of the container and increase the load capacity of the scrap, can lower the center of gravity of the container to improve the running stability of the trailer during scrap transportation, and further, the floor, the front wall, the rear wall And it aims at providing the open top container which can prevent the fatigue fracture of each side wall.

The invention according to claim 1 is a floor in which horizontal joists and vertical joists are welded to the lower surface of the floor plate, a front wall in which a front plate reinforcing plate is welded to the outer surface of the front plate, and a rear plate reinforcing material on the outer surface of the rear plate. In an open top container having a rear wall welded with a plate and a pair of left and right side walls welded with a side plate reinforcing plate on the outer surface of the pair of left and right side plates, the ceiling portion is open and scrap is loaded in the internal space The floor plate, the front plate, the rear plate and the pair of left and right side plates are each formed of a wear-resistant steel plate having an elastic limit point of 1000 to 2000 N / mm ² and a Brinell hardness of 300 to 700 HBW. The horizontal joists, the vertical joists, the front plate reinforcing plate, the rear plate reinforcing plate, and the side plate reinforcing plate are formed by pressing a wear-resistant steel plate of the same material into a U-shaped cross section. , Yokojota and the front A vertical joist is an open top container that is welded in a butted state.

The open top container is mounted on a waste transport trailer (towed vehicle) connected to a self-propelled tractor (towed vehicle).
The kind of scrap is not limited. For example, crushed materials such as scrap automobiles and construction waste materials can be employed. Of course, the load that can be transported by the open top container is not limited. For example, other industrial wastes other than scrap may be used.
An open top container is a metal box having a floor, a front wall, a rear wall, a pair of left and right side walls, and a ceiling portion that is always open.

The floor is formed by welding the horizontal joists and the vertical joists to each other on the lower surface of the floor board in a lattice shape.
Specifically, adjacent horizontal joists and vertical joists are welded, and these joists are respectively welded to the lower surface of the floor board. The cross-sectional shapes of the horizontal joists and vertical joists are U-shaped in cross section.
In this way, the horizontal joist and the vertical joist are abutted (the joists are provided at the same height position, and one fore edge surface is in contact with the other side surface). The height of the container is lower than that in which the joists are arranged in two upper and lower stages. The number of horizontal joists and vertical joists is generally plural (the same applies to the pair of left and right side plate reinforcing plates).

The front wall is obtained by welding a front plate reinforcing plate to the outer surface of the front plate. The shape of the front plate reinforcing plate is U-shaped in cross section .
The rear wall is formed by welding a rear plate reinforcing plate to the outer surface of the rear plate. The rear wall may be provided at the rear end of one of the pair of side walls so as to be openable and closable via a hinge having a pivot shaft extending in the vertical direction, or may be a sealed type (fixed type). The shape of the rear plate reinforcing plate is a U-shaped cross section .
The left side wall is formed by welding the left side plate reinforcing plate to the outer surface of the left side plate, and the right side wall is formed by welding the right side plate reinforcing plate to the outer surface of the right side plate. The shapes of the left side plate reinforcing plate and the right side plate reinforcing plate are U-shaped in cross section .

These floor plates, front plates, rear plates and a pair of left and right side plates, horizontal joists, vertical joists, front plate reinforcing plates, rear plate reinforcing plates and left and right side plate reinforcing plates have an elastic limit point of 1000 to 1000. Each of them is formed of a wear-resistant steel plate having 2000 N / mm ² and Brinell hardness of 300 to 700 HBW.
The wear-resistant steel plate is mainly composed of iron, and carbon (C; 0.21% by weight or more), silicon (Si: 0.70% by weight or more), manganese (Mn: 2.00% by weight or more), phosphorus (P: 0.015 wt% or more), sulfur (S: 0.010 wt% or more), nickel (Ni: 1.00 wt% or more), chromium (Cr: 120 wt% or more), molybdenum (Mo: 0 .60 wt% or more) and boron (B: 0.005 wt% or more) are added.

The elastic limit point (yield point) of the wear-resistant steel plate is 1000 to 2000 N / mm ² . If it is less than 1000 N / mm ² , there is no significant difference in elastic deformability compared to ordinary steel having an elastic limit point of about 400 N / mm 2. Moreover, if it exceeds 2000 N / mm ² , it is too hard and the side wall may be damaged by an impact or the like when scrap is thrown into the container. In particular, the elastic limit point (yield point) of the wear-resistant steel plate is preferably 1025 to 1405 N / mm ² .
Examples of wear-resistant steel plates include Ablex manufactured by Nippon Steel & Sumitomo Metal (formerly Wellhard manufactured by Nippon Steel & Sumitomo Metal), Everhard manufactured by JFE Steel, and Hardox manufactured by Swedish Steel. (Swedish steel) can be used.
The wear resistance of the wear resistant steel sheet is 300 to 700 HBW in terms of Brinell hardness. If it is less than 300 HBW, the wear resistance is not so remarkable as compared with ordinary steel of around 130 HBW. Moreover, if it exceeds 700HBW, it will be too hard and there exists a possibility that a side wall may be damaged by the impact etc. which thrown the scrap into the container. In particular, the wear resistance of the wear resistant steel sheet is preferably 400 to 500 HBW in terms of Brinell hardness.

  In the invention according to claim 2, the horizontal joists and the vertical joists are each of a U-shaped cross section in which the base end portions of a pair of parallel antipodal plate pieces are connected by connecting plate pieces, The horizontal joists were welded to the lower surface of the floor board with the opening facing upward, and the vertical joists were welded to the lower surface of the floor board and the adjacent butting surfaces of the adjacent horizontal joists with the opening facing sideways, respectively. It is an open top container of Claim 1.

A horizontal joist or vertical joist having a U-shaped cross-section is a channel steel material in which the base ends of a pair of parallel and spaced-apart elongate facing plate pieces are integrally connected in an orthogonal state by connecting plate pieces, respectively. .
Since the wear-resistant steel plate is hard, it is difficult to press into a square pipe shape with each side short like conventional horizontal joists and vertical joists. Therefore, the horizontal joists and the vertical joists were made into U-shapes that can be pressed.

Further, “the side joist is welded to the lower surface of the floor board with the opening facing upward” means that the front end surface of each counter board piece of the horizontal joist is welded to the lower surface of the floor board, respectively. .
Furthermore, “the vertical joists are welded to the lower surface of the floor board and the abutting surface of the adjacent horizontal joists, respectively, with the opening facing sideways” means that the upper surface of the counter board piece on the upper side of the vertical joist is the lower surface of the floor board It means that the outer surface of the vertical joist connecting plate piece (butting surface on the vertical joist side) is welded to the adjacent butting surface of the horizontal joist plate (the outer surface of the corresponding counter plate member). .

  The size of the U-shaped cross section of the horizontal joists and vertical joists is arbitrary. However, in the horizontal joist and the vertical joist, in the U-shaped cross section, it is preferable that each of the U-shaped opposing plate pieces is shorter than the U-shaped connecting plate piece. The reason for this is that the wear-resistant steel plate is a high-hardness material, so that each of the opposing plate pieces (hereinafter referred to as U-shaped cross-section) from the portion of the connection plate piece (hereinafter referred to as U-shaped end portions) of the U-shaped cross section This is because it is difficult to lengthen the middle part of the U-shape.

The horizontal joists and the vertical joists may each be a U-shaped cross-section having the same cross-sectional size in which the base end portions of a pair of parallel opposing plate pieces are connected by the connecting plate pieces. In this way, the horizontal joist with the opening facing up is welded to the floor frame (the horizontal joist and the floor frame have the same height) and the bottom surface of the floorboard, and the vertical joist with the opening facing sideways When the welded to the bottom surface of the floor plate and the abutting surface of the adjacent horizontal joists, respectively, at the abutting portion of each horizontal joist with the adjacent vertical joist, between the lower surface of the connecting plate piece of the horizontal joists and the ground respectively A gap appears.
Therefore, even if rainwater enters under the floor of the container during rainy weather, the rainwater flows out of the floor through these gaps. Further, since the air permeability is good in this way, it is easy to dry even if some rainwater accumulates under the floor. Thereby, generation | occurrence | production of the rust of the underfloor part by rain water can be prevented. Furthermore, since the air permeability under the floor is high as described above, the temperature rise in the container in summer can be suppressed.

  According to the first aspect of the present invention, in the open top container, the floor plate, the horizontal joists and the vertical joists constituting the floor, the front plate and the front plate reinforcing plate constituting the front wall, and the rear wall constituting the rear wall The use of the material by adopting a wear-resistant steel plate that is stronger than conventional ordinary steel as the material for the reinforcing plate for the plate and rear plate, each side plate constituting the pair of left and right side walls, and the corresponding reinforcing plate for each side plate The amount can be reduced, the weight of the open top container can be reduced, the amount of scrap loaded can be increased, and the fatigue failure of the floor, front wall, rear wall and each side wall can be prevented.

That is, when a large amount of scrap is loaded in the container, the central portions of the floor, the front wall, the rear wall, and the pair of left and right side walls are pushed from the inside by the large amount of scrap and try to expand. However, since these are made of wear-resistant steel plates that are harder than ordinary steel, deformation of the floor and the central part of each wall is suppressed. Moreover, the wear-resistant steel plate has a higher elastic limit point than ordinary steel. Therefore, if the scrap is unloaded at the transport destination, the stress on the floor and each wall is removed, and these are restored to the original flat floor and each wall without plastic deformation. As a result, even if each wall is subjected to repeated stress due to a large amount of scrap input, the mechanical strength of these central portions is hardly lowered, and fatigue failure of the floor, front wall, rear wall and each side wall is suppressed. .
In addition, the horizontal joists and vertical joists are not welded in two steps up and down as in the past, but the horizontal joists and vertical joists are welded in a butted state. And the trailer traveling stability during scrap transportation increases.

In particular, according to the open top container of claim 2, the horizontal joists and the vertical joists are each formed from a wear-resistant steel plate having a U-shaped cross section. Thereby, the horizontal joists and the vertical joists can be separated from, for example, a single U-shaped wear-resistant steel plate, and the number of parts of the open top container can be reduced.
In addition, the number of parts is further reduced and welding is facilitated as compared with the case where the horizontal joists and the vertical joists are welded through a large number of unstable right-angled triangular pieces as in the prior art.

It is a perspective view of the use condition of the open top container which concerns on Example 1 of this invention. It is a disassembled perspective view of the open top container which concerns on Example 1 of this invention. It is a bottom view of the open top container which concerns on Example 1 of this invention. It is a disassembled perspective view of the baseplate which comprises some open top containers which concern on Example 1 of this invention. (A) is an AA expanded sectional view of FIG. (B) is an BB expanded sectional view of Drawing 3. It is the principal part perspective view which looked at the open top container which concerns on Example 1 of this invention from the front. It is the principal part perspective view which looked at the open top container which concerns on Example 1 of this invention from back. It is the principal part perspective view which looked at the open top container which concerns on Example 1 of this invention from the side.

  Examples of the present invention will be specifically described below. Here, an open top container mounted on a container semi-trailer for transporting waste connected to a self-propelled tractor is taken as an example.

As shown in FIGS. 1 and 2, an open top container (hereinafter referred to as a container) 10 according to a first embodiment of the present invention is a container semi-trailer 11 for transporting waste that is pulled by a tractor (not shown) equipped with an engine. It is a metal rectangular box in which the ceiling portion is opened and the scrap S is mounted in the internal space.
The container 10 includes a floor panel ASSY (floor) 12, a front panel ASSY (front wall) 13, a rear gate ASSY (rear wall) 14, a left side panel ASSY 15 (side wall), and a right side panel ASSY (side wall) 16. Specifically, the container 10 has a length in the front-rear direction of 12.9 m, a width in the left-right direction of 2.5 m, and a height of 2.0 to 2.45 m.

Hereinafter, with reference to FIGS. 1-8, these structures are demonstrated concretely.
As shown in FIGS. 2 to 5, the floor panel ASSY 12 is a wear-resistant steel plate having a rectangular shape that is long in the front-rear direction and having a thickness of 4.5 mm (ABREX500S manufactured by Nippon Steel & Sumikin Co., Ltd. (manufactured by Nippon Steel & Sumikin Co., Ltd.). ABREX 400 may also be used.) A plurality of cross members (Yokojota) 18 made of wear-resistant steel plates (ABREX 400 manufactured by Nippon Steel & Sumikin Co., Ltd.) are provided on the lower surfaces of the front floor panel (floor board) 17 and the rear floor panel (floor board) 17A. And a plurality of sub-frames (vertical joists) 19 are welded to each other. In addition, the elongate reinforcement rail 17a is welded to the back surface of the welding part of each floor panel 17 and 17A. Furthermore, a rectangular reinforcing panel 17b for a kingpin (not shown) is welded to the back surface of the center portion in the width direction of the front end portion of the front floor panel 17.
In addition, container connection fittings 23 a for connection to the container semi-trailer 11 are disposed at the four corners of the floor panel ASSY 12. Further, each side rail 22 is provided with a plurality of hooks 23b at a predetermined pitch in the length direction.

  In other words, a rectangular floor rail 23 that is long in the front-rear direction and includes a front rail 20, a rear rail 21, and a pair of left and right side rails 22 each made of a wear-resistant steel plate (for example, SS400 material), and a plurality of them at a predetermined pitch in the front-back direction. The cross members 18 (including the short front cross members 18A arranged on the left and right on the front side) 18 are welded in parallel, and a plurality of short sub-frames 19 are disposed between the adjacent cross members 18 (adjacent to each other). Are welded to each other in a state of abutting against the front cross member 18A). A pair of left and right front side rails 22 </ b> A are spaced apart in close proximity to the front side portion of the pair of left and right side rails 22 in parallel with the corresponding ones. Between the side rails 22 and the front side rails 22A facing each other, both ends in the length direction of the three front cross members 18A on the left and right are welded. The floor panels 17 and 17A whose bottom surfaces of the cross members 18 are aligned with the bottom surfaces of the floor rails 23 are welded to the top surfaces of the floor rails 23, the cross members 18 and the sub frames 19, respectively. .

Each cross member 18 and each sub-frame 19 are produced by press-molding a wear-resistant steel plate having a predetermined size (FIGS. 5A and 5B). The cross member 18 and the sub-frame 19 having a U-shaped cross section are respectively connected to the base ends of a pair of elongated vertical side (anti-plate plate pieces) 18a, 19a spaced apart in parallel by lateral sides (connection plate pieces) 18b, 19b. They are integrally connected in an orthogonal state. Each cross member 18 is a U-shaped frame having a cross-sectional width a of 225 mm (300 mm depending on the part), a cross-sectional height b of 125 mm, and a thickness of 4.5 mm. It is. On the other hand, each of the sub-frames 19 has a cross-sectional width c of 50 mm orthogonal to the length direction, and the cross-sectional height d is 125 mm, which is the same as the height b of the cross member 18 and has a thickness of 4.5 mm. It is a frame shaped like a letter.
Of these members, the cross members 18 are welded to the lower surface of the floor panel 17 so that the openings are directed upward, and are parallel to each other at a predetermined pitch in the front-rear direction. Each sub-frame 19 is welded to the lower surface of the floor panel 17 and the abutting surface of each adjacent cross member 18 with the opening facing sideways.

As shown in FIG. 6, the front panel ASSY 13 constitutes a wall portion on the front side (the tractor side) of the container 10. The front panel ASSY 13 is a wear-resistant steel plate having a substantially square shape and a thickness of 4.5 mm on a substantially square front frame 28 including a lower front rail 20, an upper front rail 26 and a pair of left and right front side posts 27. A front panel (front plate) 29 made of (ABSEX500S manufactured by Nippon Steel & Sumikin Co., Ltd. or ABREX400 manufactured by Nippon Steel & Sumikin Co., Ltd. having a thickness of 6 mm) is welded, and the front panel 29 is reinforced with a lattice-shaped front plate. The plate 30 is welded. The front plate reinforcing plate 30 is a frame body in which strip-shaped covers having three vertical and one horizontal cross sections each having an opening on the side welded to the front panel 29 are assembled in a lattice shape.
A simplified lightweight trap 31 is fixed to the left end of the front panel assembly 13. Further, a horizontal seat deck 32 connected to the tip end portion of the trap 31 is fixed to the upper portion of the front panel ASSY 13.

As shown in FIG. 7, the rear gate ASSY 14 is a lid that closes an opening (scrap discharge port) on the rear surface of the container 10, and a rear gate hinge 33 having a pivot shaft extending in the vertical direction at the rear end of the left side panel ASSY 15. It can be opened and closed via
The rear gate ASSY 14 is a wear-resistant steel plate having a substantially square shape and a thickness of 4.5 mm, formed on a substantially square rear frame 36 composed of a lower rear rail 21, an upper rear rail 34 and a pair of left and right rear side posts 35. A rear gate panel (rear plate) 37 made of ABREX500S manufactured by Nippon Steel & Sumikin Co., Ltd. or ABREX400 manufactured by Nippon Steel & Sumikin Co., Ltd. having a thickness of 6 mm is welded. A grid-like back plate reinforcing plate 38 made of Sumikin ABREX 400) is welded. The rear plate reinforcing plate 38 is a frame body in which a strip-shaped cover having three vertical and three horizontal cross sections each having an opening on the welding side with the rear gate ASSY 14 is assembled in a lattice shape. Further, another trap 31A is fixed to the left end portion of the rear gate ASSY14.

As shown in FIGS. 1, 2, and 8, the pair of left and right side panels ASSY 15, 16 is a rectangular left and right long side composed of a front side post 39, a rear side post 40, a side lower rail 41, and a side upper rail 42. A pair of left and right side panels (side plates) 44 made of wear-resistant steel plates are welded to the pair of side frames 43, and five vertically long side plate reinforcing plates 45 are predetermined in the front-rear direction on the outer surface of each side panel 44. They are welded in parallel with each other at a pitch.
Each side panel 44 is a wear-resistant steel plate having a height of 1.8 m, a length of 6 m, and a thickness of 4.5 mm (ABREX500S manufactured by Nippon Steel & Sumikin Co., Ltd. or ABREX400 manufactured by Nippon Steel & Sumikin Co., Ltd. having a thickness of 6 mm. ) And two front side panels 46 and a rear side panel 46 </ b> A formed by butt welding in the length direction (front-rear direction) of the container 10. In addition, a plurality of rear gate locks 47 at the right edge portion (front side portion) of the rear gate ASSY 14 are arranged at a predetermined pitch in the vertical direction at the rear end of the right side panel assembly 16 (FIG. 7).

Reinforcing side upper rails 48 are welded to the outer surfaces of the upper and lower sides of the pair of left and right side panels ASSY 15 and 16, respectively. Each reinforcing side upper rail 48 and each reinforcing side lower rail 49 employs square steel plates.
Further, a reinforced front side post 50 and a reinforced rear side post 51 made of a wear-resistant steel plate (ABREX 400 manufactured by Nippon Steel & Sumitomo Metal) are welded to the outer surfaces of the front and rear sides of the left side panel ASSY 15 and the right side panel ASSY 16, respectively. Has been. The reinforcing front side post 50 and the reinforcing rear side post 51 are wide frames in which U-shaped belt-shaped covers having an opening on the welding side are arranged vertically.

On the outer surface of the butt welded portion 52 of each front side panel 46 and rear side panel 46A, two strip-shaped reinforcing ribs (not shown) projecting perpendicularly (at right angles) from the outer surface and inclined at an angle of 15 ° in the vertical direction. The corresponding left side panel ASSY 15 and right side panel ASSY 16 are welded in parallel so as to extend linearly from the upper end to the lower end. Each reinforcing rib is made of a wear-resistant steel plate (ABREX400 manufactured by Nippon Steel & Sumikin Co., Ltd.), and each lower end is gradually inclined toward the front of the container 10.
Further, a predetermined number of reinforcing ribs (not shown) identical to those described above are also welded to the outer surface of the front side panel 46 and the rear side panel 46A divided into three in the length direction, so that the left side panel ASSY15 and the right side panel The entire ASSY 16 is reinforced (increasing surface rigidity).

Further, on the outer surface of each butt weld 52, a reinforcing side plate reinforcing plate 45 inclined by 15 ° with respect to the vertical direction so as to cover the corresponding reinforcing rib is provided at the lower end from the upper end of each side panel ASSY 15,16. It is welded so as to extend linearly. Each side plate reinforcing plate 45 has a U-shaped cross-section in which the welded surface with the corresponding front side panel 46 and rear side panel 46A is an open surface, and has a width corresponding to the number of reinforcing ribs to be stored. It is a frame made of NS
Further, as shown in FIG. 2, the rear end portion of the left side panel ASSY 15 covered by the wide reinforcing rear side post 51 is a support portion of the rear gate hinge 33. A pair of left and right L-shaped reinforcing members 53 each including a fork of a forklift that is a forged product of carbon steel is incorporated in the rear end portions of the side panels ASSY 15 and 16. Thus, the support portion of the rear gate hinge 33 of the left side panel ASSY 15 is reinforced so as not to be bent outward by the weight of the rear gate ASSY 14, and the rear end portion of the right side panel ASSY 16 is also reinforced.

Next, with reference to FIGS. 1-8, the usage method of the open top container 10 which concerns on Example 1 of this invention is demonstrated.
As shown in FIG. 1, the scrap S discharged from the scrap processing factory is mounted on a container semi-trailer 11 for transporting waste connected to a self-propelled tractor using a rough terrain crane with a magnet. At the same time, the rear gate ASSY 14 is closed and the container 10 is opened up to the maximum loading capacity.

  At this time, as shown in FIGS. 1 to 8, each of the floor panels 17, 17 </ b> A, the cross member 18 and the subframe 19 constituting a part of the floor panel ASSY 12, and a front panel 29 constituting a part of the front panel ASSY 13. And the front plate reinforcing plate 30, the rear gate panel 37 and the rear plate reinforcing plate 38 constituting a part of the rear gate ASSY 14, the side panels 44 constituting a part of the pair of left and right side panels ASSY 15 and 16, and corresponding parts. As a material for each side plate reinforcing plate 45, a wear-resistant steel plate having higher strength than conventional plain steel was adopted. As a result, the amount of material used is reduced, the weight of the open top container 10 can be reduced, and the loading amount of the scrap S can be increased accordingly, and the floor panel ASSY 12, front panel ASSY 13, rear gate ASSY 14 and each side can be increased. The fatigue failure of the panels ASSY 15 and 16 can be prevented.

That is, when a large amount of scrap S is loaded in the container 10, the center portions of the floor panel ASSY 12, the front panel ASSY 13, the rear gate ASSY 14, and the pair of left and right side panels ASSY 15, 16 are inward from the inside by the large amount of scrap S. It tries to swell when pushed outward. However, since these are made of wear-resistant steel plates that are harder than ordinary steel, deformation of the center portion of the floor panel ASSY 12 and the panels ASSY 13 to 16 is suppressed.
In particular, as shown in FIG. 7, since the outer surface of the rear gate ASSY 14 is reinforced by the rear plate reinforcing plate 38, it is possible to suppress the outward expansion amount of the rear gate ASSY 14 when the scrap is fully loaded. This prevents a gap from being formed between the rear end surface of the floor panel ASSY 12 and the inner surface of the rear gate ASSY 14 due to the outward expansion of the rear gate ASSY 14, and as a result, prevents the scrap S from falling from this gap. can do.

Moreover, the wear-resistant steel plate has a higher elastic limit point than ordinary steel. Therefore, when the scrap S is unloaded at the transport destination, stress on the floor panel ASSY 12 and each panel ASSY 13-16 is removed, and these are not plastically deformed, and the original flat floor panel ASSY 12 and each panel ASSY 13-16. Restore to. As a result, even if the floor panel ASSY 12 or each panel ASSY 13 to 16 is repeatedly subjected to stress due to the large amount of scrap S, the mechanical strength of these central portions is hardly lowered, and the floor panel ASSY 12, front panel ASSY 13, rear gate Fatigue failure of ASSY 14 and each side panel ASSY 15, 16 is suppressed.
Moreover, since the wear-resistant steel plate is employed as the material for the floor panel ASSY 12 and each of the panels ASSY 13 to 16 as described above, it is less likely to be worn compared to ordinary steel. As a result, when the scrap loader is operated and the scrap S is put into the container 10, even if the scrap S collides with the inner surface of the floor panel ASSY 12 and each of the panels ASSY 13 to 16 and the rubbing occurs, these wears than the conventional product. Can be reduced.

Furthermore, the cross member 18 and the sub frame 19 are not welded to the upper and lower stages as in the conventional case, but the cross member 18 and the sub frame 19 are welded in a butted state. The center of gravity of the container 10 is lowered, and the traveling stability of the container semi-trailer 11 during scrap transportation can be improved.
Here, since each cross member 18 and each subframe 19 are made by press-molding a wear-resistant steel plate of a predetermined size, for example, the crossmember 18 and the subframe 19 are combined into one cross-section. It is also possible to cut out from the U-shaped wear-resistant steel plate, and the number of parts of the open top container 10 can be reduced.
Furthermore, conventionally, the cross member 18 and the sub-frame 19 are welded via a large number of right-angled triangular weld pieces. However, compared with this, the number of parts is further reduced and welding is facilitated. .

  In addition, each cross member 18 and each subframe 19 have a U-shaped vertical side portion 18a, 19a shorter than a U-shaped lateral side portion 18b, 19b in a U-shaped cross section. (FIGS. 5A and 5B). For this reason, the wear-resistant steel plate is easy to press-form despite being a high hardness material.

  The open top container according to the present invention is useful as an open top container for conveying scrap or the like which is industrial waste.

10 Open top container,
12 Floor panel assembly (floor),
13 Front panel assembly (front wall),
14 Rear gate assembly (rear wall),
15 Left side panel ASSY (side wall),
16 Right side panel ASSY (side wall),
17 Front floor panel,
17A rear floor panel,
18 Cross member (Yokojota),
19 Side frame (vertical joist),
24 Vertical side
25 Lateral side (connecting plate piece)
29 Front panel (front plate),
30 Reinforcing plate for front plate,
37 Rear gate panel (rear plate),
38 Reinforcing plate for rear plate,
44 Side panel (side plate),
45 Reinforcing plate for side plate,
S Scrap.

Claims (2)

A floor in which horizontal joists and vertical joists are welded to the lower surface of the floor plate, a front wall in which the front plate reinforcing plate is welded to the outer surface of the front plate, a rear wall in which the rear plate reinforcing plate is welded to the outer surface of the rear plate, and In the open top container that has a pair of left and right side walls welded with side plate reinforcing plates on the outer surfaces of the pair of left and right side plates, the ceiling portion is open and the interior space is loaded with scrap,
The floor plate, the front plate, the rear plate and the pair of left and right side plates are each formed of a wear-resistant steel plate having an elastic limit point of 1000 to 2000 N / mm ² and a Brinell hardness of 300 to 700 HBW.
The horizontal joists, the vertical joists, the front plate reinforcing plate, the rear plate reinforcing plate, and the side plate reinforcing plate are formed into a U-shaped cross section by pressing a wear-resistant steel plate of the same material as this,
The horizontal joists and the vertical joists are open top containers that are welded in a butted state. The horizontal joists and the vertical joists are U-shaped cross-sections in which the base end portions of a pair of parallel antipodal plate pieces are connected by a connecting plate piece,
Among these, the horizontal joists are welded to the lower surface of the floor board with the opening facing upward, and the vertical joists are respectively facing the lower surface of the floor board and the adjacent butting surfaces of the horizontal joists facing the opening. The open top container according to claim 1, which is welded.

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