CN204979878U - Container chassis and container comprising same - Google Patents

Abstract

The utility model discloses a container bottom frame and a container with the bottom frame. The underframe includes two bottom side beams, front and rear end beams, multiple bottom beams transversely connected to the two bottom side beams, and also includes a wooden floor and metal longitudinal beams laid on the bottom beams. The metal longitudinal beam is at least one, and the metal longitudinal beam It is arranged at intervals with the wooden floor, and the wooden floor is fixedly connected to the bottom beam. At least one side of the wooden floor is provided with a limiting part I, at least one side of the metal longitudinal beam is provided with a limiting part II, and the inner surface of the limiting part II is connected to the bottom. The crossbeams are not in surface contact, and the limit part II is closer to the bottom crossbeam than the limit part I, so that the displacement of the metal longitudinal beam in the direction away from the bottom crossbeam is limited by the wooden floor. The positional relationship between the metal longitudinal beam and the wooden floor of the container underframe of the utility model can make the displacement of the metal longitudinal beam in the direction away from the bottom beam be limited by the wooden floor, avoiding the welding connection between the metal longitudinal beam and the bottom beam, so that the metal longitudinal beam is deformed The difficulty of control is small.

Description

A container underframe and a container with the underframe

technical field

The utility model relates to the technical field of containers, in particular to a container bottom frame and a container with the bottom frame.

Background technique

As the main carrier of international freight, containers are widely used in air transportation, Among the various modes of combined transport combining shipping and land transport, it is considered to be an important carrier to realize multiple combined transport of sea + land + air.

In terms of the structure of the container body, it usually includes side walls, front end, rear end, top and bottom frame. Among them, the container bottom frame is the key load-bearing structure of the container, which directly bears the weight of the goods in the box. The container bottom frame Production costs and maintenance costs account for a relatively high proportion of the major components of the container.

The container chassis generally includes bottom side beams, front and rear end beams, bottom beams and a floor above the bottom beams. At present, the floor of the container chassis is generally a wooden floor. Due to the increasing shortage of wood used to manufacture the container chassis, the manufacturing cost of the container chassis is increasing. Some floor manufacturers have begun to use inferior wood to replace the original Apitong, Keruing and other high-quality wood. As a result, the quality of the existing container floor is uneven, and the damage rate of the floor in the later period is high, making it difficult to guarantee the quality of the container chassis with wooden floors. As a result, the floor maintenance cost of the container chassis accounts for more than 30% of the maintenance cost of the whole container. As a result, the maintenance cost of the container is very high. In view of this, a steel-wood hybrid floor has appeared in the field of container production. The above-mentioned length direction refers to the direction parallel to the bottom side beam) extending wooden floor and steel floor. However, this kind of floor has the following defects:

It is difficult to control the deformation of the steel floor.

Utility model content

An object of the present invention is to provide a container underframe to solve the technical problem of difficulty in controlling the deformation of the steel floor of the existing container underframe.

Another object of the present utility model is to provide a container with the above-mentioned underframe, so as to solve the difficult technical problem of the deformation control of the steel floor of the existing container underframe.

The utility model purpose is realized through the following technical solutions:

A container bottom frame, comprising two bottom side beams parallel to each other, two front and rear end beams parallel to each other, multiple bottom beams transversely connected to the two bottom side beams, and a wooden floor laid on the bottom beams and metal longitudinal beams, the wooden floor and the metal longitudinal beams are laid along the width direction of the chassis, the metal longitudinal beams are at least one piece, and the metal longitudinal beams and the wooden floor are arranged at intervals, so The wooden floor is fixedly connected to the bottom beam, at least one side of the wooden floor is provided with a limiting part I, at least one side of the metal longitudinal beam is provided with a limiting part II, and the inner surface of the limiting part II is There is no surface contact with the bottom beam, and the limiting part II is closer to the bottom beam than the limiting part I, so that the displacement of the metal longitudinal beam in the direction away from the bottom beam is restricted by the wooden floor.

Preferably, the metal longitudinal beam includes a panel, and the limiting part II is a side plate formed by extending the two ends of the width direction of the panel toward the direction of the bottom beam, and the clamping portion between the side plate and the panel The angle is an obtuse angle, the inner surface of the side plate is in non-surface contact with the bottom crossbeam, and the limit part I is an inclined plane arranged on the wooden floor and opposite to the side plate, and the side plate is larger than The slope is close to the bottom beam so that the displacement of the metal longitudinal beam in the direction away from the bottom beam is limited by the wooden floor.

Preferably, the slope is parallel to a surface of the side plate opposite to the slope.

Preferably, the included angle between the side plate and the panel is greater than or equal to 120° and less than or equal to 150°.

Preferably, the metal longitudinal beam includes a panel, and the limiting part II is a step I formed by bending the two ends of the panel in the width direction toward the bottom beam, and the inner surface of the step I is in contact with the bottom beam. The bottom beam is not in surface contact, the limiting part I is a step II arranged on the side of the wooden floor in the width direction and matched with the step I, and the step I is closer to the step II than the step II The bottom beam is such that the displacement of the metal longitudinal beam in the direction away from the bottom beam is restricted by the wooden floor.

Preferably, the limiting part I is screwed to the limiting part II.

Further, the metal longitudinal beam includes a panel, and the limiting portion II is a step I formed by bending at least one end of the panel in the width direction toward the bottom beam, and the inner surface of the step I is in contact with the bottom beam. The bottom beam is not in surface contact, the limiting part I is a step II arranged on the side of the wooden floor in the width direction and matched with the step I, and the step II overlaps the step I , the fastener passes through the step II, the step I and the bottom beam in turn so as to make the wooden floor and the bottom beam fixedly connected.

Further, the metal longitudinal beam further includes at least one reinforcing beam arranged on the bottom surface of the panel.

Preferably, the cross-section of the reinforcing beam is inverted T-shaped, C-shaped, U-shaped, inverted U-shaped or rectangular.

Further, the gap between the wooden floor and the metal stringer is filled with glue.

The glue mentioned above can be a sealant, and the sealant can also be viscous, and can fix the wooden floor and the metal stringer.

A container includes the above-mentioned container bottom frame.

Compared with the prior art, the utility model has the following beneficial effects:

1. The positional relationship between the metal longitudinal beam and the wooden floor of the container underframe of the utility model can make the displacement of the metal longitudinal beam to the direction away from the bottom beam limited by the wooden floor, and the metal longitudinal beam is not connected to the bottom beam by welding, so that the metal longitudinal beam The difficulty of stringer deformation control is reduced.

2. The connection relationship between the metal longitudinal beam and the bottom cross beam of the utility model simplifies the installation process of the metal longitudinal beam, reduces the labor intensity of the workers, and improves the production efficiency.

3. The connection relationship between the metal longitudinal beam and the bottom beam of the utility model can match the production line of the existing wooden floor of the standard box to the greatest extent, which is beneficial to ensure the production efficiency.

4. The container underframe of the utility model can adjust the width of the metal longitudinal beam and the wooden floor according to the needs, so as to meet the individual requirements of customers.

5. The container underframe of the utility model greatly reduces the consumption of wooden floors and reduces the dependence on wood.

Description of drawings

Fig. 1 is the top view of embodiment 1 of the container underframe of the present utility model;

Fig. 2 is a sectional view cut along the "B"-"B" direction in Fig. 1;

Fig. 3, Fig. 4 and Fig. 5 are the side views of the metal stringer in embodiment 1;

Fig. 6 is the side view of the wooden floor in embodiment 1;

Fig. 7 is a partial cross-sectional structural schematic diagram cut along the width direction of the container underframe of Embodiment 2 of the container underframe of the present invention;

Fig. 8 is the side view of the metal stringer in embodiment 2;

Fig. 9 is the side view of the wooden floor in embodiment 2;

Fig. 10 is a partial cross-sectional structural schematic diagram cut along the width direction of the container underframe of Embodiment 3 of the container underframe of the present invention;

Fig. 11 is the side view of the metal stringer in embodiment 3;

Fig. 12 is a partial side view of the wooden floor of Example 3.

detailed description

In the prior art, when laying the floor, generally the steel floor is fixedly connected to the bottom beam by welding first, and then the wooden floor is laid and the wooden floor is fixedly connected to the bottom beam with screws. After research, it is found that the steel floor is connected to the bottom beam by welding, which will make it difficult to control the deformation of the steel floor. In order to solve the above technical problems, the utility model proposes a container underframe.

Below in conjunction with accompanying drawing, specifically illustrate the utility model. In order to enable those skilled in the art to clearly and completely understand the content of the utility model and implement the technical solution of the utility model, a large number of details are disclosed in the embodiments. However, obviously, without these details, those skilled in the art can also implement the technical solution of the utility model, achieve the purpose of the utility model, and realize the effect of the utility model. These details are the optimal implementation mode selected by the inventor through a large number of experiments, and are not used to limit the protection scope of the present utility model. The protection scope of the present utility model is determined by the content of the claims, and the technical solutions obtained by those skilled in the art based on the contents disclosed in the application documents without creative labor are also within the protection scope of the present utility model.

The utility model discloses a container underframe, which comprises two bottom side beams parallel to each other, two front and rear end beams parallel to each other, a plurality of bottom beams transversely connected to the two bottom side beams, and a bottom beam laid on the bottom beams. The wooden floor and the metal longitudinal beam on the top, the wooden floor and the metal longitudinal beam are laid along the width direction of the chassis, the metal longitudinal beam is at least one piece, and the metal longitudinal beam and the wooden floor are mutually Set at intervals, the wooden floor is fixedly connected to the bottom beam, at least one side of the wooden floor is provided with a limiting part I, at least one side of the metal longitudinal beam is provided with a limiting part II, and the limiting part The inner surface of II is in non-surface contact with the bottom beam, and the limiting part II is closer to the bottom beam than the limiting part I, so that the displacement of the metal longitudinal beam in the direction away from the bottom beam is affected by the wooden Floor restrictions.

The positional relationship between the limit part I of the wooden floor of the container underframe of the utility model and the limit part II of the metal longitudinal beam can make the displacement of the metal longitudinal beam to the direction away from the bottom beam limited by the wooden floor, avoiding the metal longitudinal beam and the metal longitudinal beam. The welding connection of the bottom beam makes it less difficult to control the deformation of the metal longitudinal beam.

Below in conjunction with specific embodiment the utility model is further described.

Example 1

Please refer to Fig. 1, a kind of container underframe, comprises two bottom side beams 1 parallel to each other, two front and rear end beams parallel to each other, a plurality of bottom beams 2 transversely connected to the two bottom side beams 1, also includes laying on The wooden floor 3 and the metal longitudinal beam 4 on the bottom beam 2, the wooden floor 3 and the metal longitudinal beam 4 are laid along the width direction of the underframe, and the width direction of the underframe refers to the The direction of side beam 1 is vertical. The metal longitudinal beam 4 is at least one piece, the metal longitudinal beam 4 and the wooden floor 3 are spaced apart from each other, and the wooden floor 3 is fixedly connected to the bottom cross beam 2 by screws.

Please refer to FIG. 2 , FIG. 3 and FIG. 6 , at least one side of the wooden floor 3 is provided with a limiting portion I, and the side of the metal longitudinal beam 4 is provided with a limiting portion II. Wherein, the metal longitudinal beam 4 includes a panel 41, and the limiting part II is that the two ends of the panel 41 in the width direction (the width direction refers to the direction perpendicular to the bottom side beam 1) face the bottom The side plate 42 formed by extending in the direction of the beam 2, the angle between the side plate 42 and the panel 41 is an obtuse angle, and the inner surface 421 of the side plate 42 is in non-surface contact with the bottom beam 2. In this embodiment, it is a line touch. The limiting portion 1 is an inclined surface 31 arranged on the wooden floor 3 and opposite to the side plate 42, and the side plate 42 is closer to the bottom beam 2 than the inclined surface 31, that is, the side plate 42 is closer to the bottom beam 2 than the inclined surface 31, that is, the The plate 42 is located below the slope 31 , so that the displacement of the metal longitudinal beam 4 in the direction away from the bottom beam 2 is limited by the wooden floor 3 .

In this embodiment, the slope 31 of the wooden floor 3 cooperates with the side plate 42 of the metal longitudinal beam 4, which has an obvious guiding effect. The beam is welded to the bottom beam, which makes it less difficult to control the deformation of the metal longitudinal beam. Secondly, the inclined plane 31 of the wooden floor 3 and the side plate 42 of the metal longitudinal beam 4 have a simple structure and are very easy to be machined. Moreover, it is also easy to carry out surface treatment such as sanding and painting after mechanical processing, that is to say, the surface treatment efficiency and effect of the wooden floor 3 and the metal stringer 4 will be improved. Furthermore, the installation and positioning of the wooden floor 3 and the metal stringer 4 are simple. In this way, the processing process of the slope 31 of the wooden floor 3 and the side plate 42 of the metal longitudinal beam 4 is simple.

Wherein, the slope 31 is parallel to the surface of the side plate 42 opposite to the slope 31 . Compared with the non-parallel situation, the contact area between the parallel slope 31 and the side plate 42 is larger, which can better prevent the side plate 42 from moving. In other embodiments, the inclined surface 31 may also be arranged non-parallel to the surface of the side plate 42 opposite to the inclined surface 31 , which also belongs to the protection scope of the present invention.

Wherein, the included angle between the side plate 42 and the panel 41 is an obtuse angle, so that the wood floor can be pressed against the steel floor.

Wherein, the angle range between the side plate 42 and the panel 41 is greater than or equal to 120° and less than or equal to 150°. Setting the angle between the side plate 42 and the panel 41 within the above-mentioned range can reduce the difficulty of machining; in addition, the metal stringer of the side plate 42 with the above-mentioned angle range can better cooperate with the inclined surface 31 of the wooden board , so that the fixing of the metal longitudinal beam 4 on the bottom beam is more stable, and the damage of the metal longitudinal beam 4 and the plank is minimal. Furthermore, when the angle between the side plate 42 and the panel 41 is 120°, 125°, 130°-140°, 145°, the effect is the best.

Wherein, the quantity of the metal longitudinal beam 4 and the wooden floor 3 can be determined according to needs. When the wooden floor 3 is only adjacent to one metal longitudinal beam 4 , one end in the width direction of the wooden floor 3 is provided with an inclined surface 31 opposite to the side plate 42 . When the wooden floor 3 is adjacent to two metal longitudinal beams 4 , an inclined surface 31 is provided at both ends of the wooden floor 3 in the width direction. The slope 31 at one end is opposite to the side plate 42 of one metal stringer, and the slope 31 at the other end is opposite to the side plate 42 of the other metal stringer.

Referring to Fig. 3 to Fig. 5, when the distance between the upper surface of the metal longitudinal beam 4 and the upper surface of the bottom beam ≥ 150mm, in order to improve the bearing capacity of the metal longitudinal beam 4, the bottom surface of the panel 41 can be At least one reinforcing beam 43 is provided. The reinforcement beam 43 can be welded to the panel 41 , and the reinforcement beam 43 can also be integrally formed with the panel 41 . The reinforcing beam 43 can be connected to the bottom cross beam 2 by welding, or can be connected to the bottom cross beam 2 by a bolt assembly.

Wherein, the cross-section of the reinforcement beam 43 can be inverted T-shaped (refer to FIG. 3 ), C-shaped, U-shaped (refer to FIG. 4 ), inverted U-shaped (refer to FIG. 5 ) or rectangular, or other shapes. The number of the reinforcement beams 43 can be determined according to needs, and can be one, or two or more. Among them, the U-shaped or inverted T-shaped reinforcing beam can strengthen the middle area of the metal longitudinal beam, which solves the problem of insufficient deformation resistance in the middle area, and can better evenly transmit the load in the box to each bottom On the crossbeam, compared with other shapes of reinforced beams, it can better protect the bottom crossbeam. Moreover, U-shape is easier to process than other shapes of reinforcing beams.

Further, the gap between the wooden floor 3 and the metal longitudinal beam 4 is filled with glue. The airtightness of the underframe can be improved by filling the gap between the wooden floor 3 and the metal stringer 4. Furthermore, if the glue has a certain viscosity, the wooden floor 3 and the metal stringer can be bonded together. 4. Fix it to make the underframe of the container more stable.

Example 2

This embodiment provides a container underframe, and the difference between this embodiment and Embodiment 1 is:

Please refer to Figures 7-9, at least one side of the wooden floor 3 is provided with a limiting portion I, and the side of the metal longitudinal beam 4 is provided with a limiting portion II, wherein the metal longitudinal beam 4 includes a panel 44, the The limiting part II is a step I45 formed by bending the two ends of the panel 44 in the width direction (the width direction refers to the direction perpendicular to the bottom side beam 1) toward the bottom cross beam 2, and the step I45 The inner surface 451 of the bottom beam 2 is in non-surface contact, and in this embodiment it is in line contact. The limiting portion I is a step II32 arranged on the side of the wooden floor 3 in the width direction and matched with the step I45, and the step I45 is closer to the bottom beam 2 than the step II32, that is, The step I45 is located below the step II32. The displacement of the metal longitudinal beam 4 in the direction away from the bottom beam 2 is restricted by the wooden floor 3 .

In this embodiment, the step II32 of the wooden floor 3 cooperates with the step I45 of the metal longitudinal beam 4, which has an obvious guiding effect. In this way, the displacement of the metal longitudinal beam to the direction away from the bottom beam is limited by the wooden floor. The metal longitudinal beam is not connected to the bottom cross beam through welding, which makes it less difficult to control the deformation of the metal longitudinal beam. In addition, the installation and positioning of the wooden floor 3 and the metal longitudinal beam 4 are simple. In this way, the processing process of the step II32 of the wooden floor 3 and the step I45 of the metal stringer 4 is simple.

Wherein, the step I45 includes a first vertical plane I452, a first horizontal plane I453 and a second vertical plane II454, and the first horizontal plane I453 is vertically connected to the first vertical plane I452 and the second vertical plane II454 to form "Z" profile. The step II32 includes a third vertical plane III321, a second horizontal plane II322 and a fourth vertical plane IV323, and the second horizontal plane II322 is vertically connected with the third vertical plane III321 and the fourth vertical plane IV323 respectively to form a "Z" shape noodle. The step I45 matches the step II32, specifically: the first vertical plane I452 is opposite to the third vertical plane III321, the first horizontal plane I453 is opposite to the second horizontal plane II322, and the second vertical plane II454 is opposite to the fourth vertical plane IV323 relatively. The shape of the steps I45 and II32 allows the wooden floor to better compress the metal stringers. In other embodiments, the steps I45 and II32 are steps of other shapes, which also belong to the protection scope of the present invention.

Wherein, the number of the wooden floor 3 and the metal longitudinal beam 4 can be determined according to the requirement. When the wooden floor 3 is only adjacent to one metal longitudinal beam 4, a step II32 is provided at one end of the wooden floor 3 in the width direction; when the wooden floor 3 is adjacent to two metal longitudinal beams 4 Meanwhile, two ends of the width direction of the wooden floor 3 are respectively provided with a step II32. The step II32 at one end cooperates with the step I45 of a metal stringer 4 , and the step II32 at the other end matches with the step I45 of a metal stringer 4 . The metal stringer 4 can be a customized profile.

For details, please refer to Example 1.

Example 3

This embodiment provides a container underframe. The difference between this embodiment and Embodiment 2 is:

Please refer to Figures 10-12, at least one side of the wooden floor 3 is provided with a limiting portion I, at least one side of the metal longitudinal beam 4 is provided with a limiting portion II, and the limiting portion I and the limiting portion II screw connection, wherein the metal longitudinal beam 4 includes a panel 47, and the limiting part II is at least one end of the panel 47 in the width direction (the width direction refers to the direction perpendicular to the bottom side beam 1) The step I48 formed by bending toward the bottom beam 2, the inner surface 481 of the step I48 is not in surface contact with the bottom beam 2, and in this embodiment is in line contact. The limiting part I is a step II33 arranged on the side of the wooden floor 3 in the width direction and matched with the step I48. The step II33 is overlapped on the step I48, and the screws 5 pass through in turn. The step II33 , the step I48 and the bottom beam 2 make the wooden floor 3 and the bottom beam 2 fixedly connected.

The screws 5 are sequentially passed through the step II33, the step I48 and the bottom beam 2 so that the wooden floor 3 is fixedly connected with the bottom beam 2, and the metal stringer 4 can be further fixed to prevent the metal stringer 4 move.

For details, please refer to Embodiment 1 and Embodiment 2.

In other embodiments, the limiting part I and the limiting part II can also be screwed in other forms, which are well known to those skilled in the art, and this also belongs to the protection scope of the present invention.

Embodiment 1 and Embodiment 2 are the cases where the wooden floor is connected with the bottom side beam and the steel floor at the same time, and the wooden floor is fixed on the bottom cross beam with screws. The manner of fixing the steel floor to the bottom beam is as in Embodiment 1 and Embodiment 2.

Embodiment 3 is a case where the steel floor is connected to the bottom side beam and the wooden floor at the same time. The wooden floor and the bottom beam can be fixed through the screw connection of Embodiment 3, and at the same time, the fixing of the steel floor and the bottom beam can be strengthened.

The positional relationship between the metal longitudinal beam and the wooden floor of the container underframe of the utility model can make the displacement of the metal longitudinal beam to the direction away from the bottom beam limited by the wooden floor, and the metal longitudinal beam is not connected with the bottom beam by welding, so that the metal longitudinal beam The difficulty of deformation control is small. The connection relationship between the metal longitudinal beam and the bottom cross beam of the utility model simplifies the installation process of the metal longitudinal beam, reduces labor intensity of workers, and improves production efficiency.

The connection relationship between the metal longitudinal beam and the bottom cross beam of the utility model can match the production line of the existing wooden floor of the standard box to the greatest extent, which is beneficial to ensure the production efficiency. The container bottom frame of the utility model can adjust the width of the metal longitudinal beam and the wooden floor as required, so as to meet the individual requirements of customers. The container underframe of the utility model greatly reduces the consumption of wooden floors and reduces the dependence on wood.

The utility model also provides a container, which includes the container underframe described in the above-mentioned embodiment 1 or embodiment 2 or embodiment 3.

The above disclosures are only a few specific embodiments of the present application, but the present application is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present application.

Claims (11)

1. a chassis of container, comprise the two foundation curb girders be parallel to each other, end carriage before and after two that are parallel to each other, be laterally connected in many foundation crossbeam of described two foundation curb girders, it is characterized in that, also comprise and be layed in wood covering on described bottom cross beam and metal longeron, described wood covering and described metal longeron are laid along the Width of described underframe, described metal longeron is at least one piece, described metal longeron and the spaced setting of described wood covering, described wood covering is fixedly connected on described bottom cross beam, at least one side of described wood covering is provided with limiting section I, at least one side of described metal longeron is provided with limiting section II, the medial surface of described limiting section II and described bottom cross beam non-face contact, described limiting section II makes the displacement of supporting or opposing from described bottom cross beam direction of described metal longeron be subject to the restriction of described wood covering than described limiting section I near described bottom cross beam.

2. chassis of container as claimed in claim 1, it is characterized in that, described metal longeron comprises a panel, described limiting section II is the side plate that the two ends of the Width of described panel extend to form towards described bottom cross beam direction, the angle of described side plate and described panel is obtuse angle, the medial surface of described side plate and described bottom cross beam non-face contact, described limiting section I is arranged on described wood covering, the inclined-plane relative with described side plate, described side plate makes the displacement of supporting or opposing from described bottom cross beam direction of described metal longeron be subject to the restriction of described wood covering than described inclined-plane near described bottom cross beam.

3. chassis of container as claimed in claim 2, it is characterized in that, described inclined-plane is parallel with face relative with described inclined-plane in described side plate.

4. chassis of container as claimed in claim 2, it is characterized in that, the angle of described side plate and described panel is for being more than or equal to 120 ° and being less than or equal to 150 °.

5. chassis of container as claimed in claim 1, it is characterized in that, described metal longeron comprises a panel, described limiting section II is the step I that the two ends of the Width of described panel are bent to form towards described bottom cross beam direction, the medial surface of described step I and described bottom cross beam non-face contact, described limiting section I is the side of the Width being arranged on described wood covering, the step II matched with described step I, described step I makes the displacement of supporting or opposing from described bottom cross beam direction of described metal longeron be subject to the restriction of described wood covering than described step II near described bottom cross beam.

6. chassis of container as claimed in claim 1, it is characterized in that, described limiting section I and described limiting section II is spirally connected.

7. chassis of container as claimed in claim 6, it is characterized in that, described metal longeron comprises a panel, described limiting section II is the step I that at least one end of the Width of described panel is bent to form towards described bottom cross beam direction, the medial surface of described step I and described bottom cross beam non-face contact, described limiting section I is the side of the Width being arranged on described wood covering, the step II matched with described step I, described step II is overlapped on described step I, fastener is successively through described step II, described step I is with described bottom cross beam thus described wood covering is fixedly connected with described bottom cross beam.

8. as the chassis of container in claim 2-7 as described in any one, it is characterized in that, described metal longeron also comprises at least one strength beam being arranged on described panel bottom surface.

9. chassis of container as claimed in claim 8, is characterized in that, the cross-sectional plane of described strength beam is inverted T shape, C type, U-shaped, inverted U or rectangle.

10. as the chassis of container in claim 1-7 as described in any one, it is characterized in that, the gap place between described wood covering and described metal longeron is filled with glue.

11. 1 kinds of freight containers, is characterized in that, comprise as the chassis of container in claim 1-10 as described in any one.