Height-adjustable cargo container

Abstract

The present invention relates to a carge container comprising: a base capable of supporting cargo; a fixed column which is a rod-shaped member extending along a first center axis and has one end coupled to the base; a movable column which is a rod-shaped member extending along the first center axis, has one end slidably coupled to the fixed column, and is provided to be reciprocally movable along the first center axis between a retracted position and an extended position; and a locking device which can fix the position of the movable column at an arbitrary location between the retracted position and the extended position, wherein the movable column comprises a pipe-shaped member having a hollow cavity therein, and is slidably movable with respect to the fixed column while the fixed column is inserted into the hollow cavity of the movable column.

Description

Height-adjustable cargo container

[0001] The present invention relates to a cargo container, and more specifically, to a cargo container capable of easily implementing a watertight structure that makes it difficult for rainwater or seawater to penetrate between a fixed column and a movable column even when it is raining or during maritime transport.

[0002] Generally, a container is a device used for the convenience of transporting cargo, and its specifications are set by the International Organization for Standardization (ISO) as 20 feet, 40 feet, 45 feet, etc.

[0003] Types of such containers include dry containers, reefer containers, open top containers, and flat rack containers.

[0004] Among these, the Flat Rack Container has no ceiling or side walls, so heavy cargo such as passenger cars or machinery can be easily unloaded from the side.

[0005] However, conventional flat rack containers have a problem in that, because their height cannot be adjusted, when cargo taller than the height of the container is loaded, another container cannot be stacked on top of that container.

[0006] Therefore, when loading cargo taller than the height of the container, the container must be placed on the top layer of the multi-layered stacked containers, and if the container cannot be stacked on the top layer, there was a problem of having to pay additional freight in proportion to the wasted space above the container.

[0007] The present invention has been devised to solve the above problem, and its purpose is to provide a cargo container with an improved structure that can easily implement a watertight structure that makes it difficult for rainwater or seawater to penetrate between the fixed column and the movable column even when it rains or during maritime transport.

[0008] To achieve the above objective, a cargo container according to the present invention comprises: a base capable of supporting and holding cargo; a fixed column, which is a rod-shaped member extending along a first central axis and has one end connected to the base; a movable column, which is a rod-shaped member extending along the first central axis and has one end connected to the fixed column so as to be slidably movable, and is configured to be reciprocally movable along the first central axis between a contracted position and an extended position; and a locking device capable of fixing the movable column at any position between the contracted position and the extended position; wherein the movable column comprises a pipe-shaped member having a hollow interior and is characterized by being slidably movable relative to the fixed column while the fixed column is inserted into the hollow of the movable column.

[0009] Here, the locking device preferably comprises: a locking member configured to enable reciprocating sliding movement along a second central axis intersecting the first central axis between a locking position that fixes the movable column relative to the fixed column and a release position that allows the movable column to slide along the first central axis relative to the fixed column; and a locking hole formed in at least one of the fixed column and the movable column, through which the locking member can pass.

[0010] Here, the locking member is coupled to the movable column so as to be capable of sliding along the first central axis together with the movable column, and it is preferable that a plurality of locking holes are provided on the fixed column in a manner arranged along the first central axis.

[0011] Here, the movable columns are provided in pairs and spaced apart from each other by a predetermined distance, and include at least one connecting beam or connecting wall connecting the pair of movable columns, and the locking member is preferably positioned at the bottom of the connecting beam located at the lowest among the connecting beams or at the bottom of the connecting wall.

[0012] Here, the movable columns are provided in pairs and spaced apart from each other by a predetermined distance, and include at least one connecting beam or connecting wall connecting the pair of movable columns, and the locking member is preferably embedded so as not to protrude from the connecting beam or connecting wall by being disposed inside one of the connecting beam or connecting wall.

[0013] Here, the device includes a member rotatably mounted on the fixed column, which is biased by gravity to rotate between a retracted position maintained by an external force and a protruding position maintained by gravity when the external force is removed, and is configured to restrain the sliding movement of the movable column at the protruding position. It is preferable that when the movable column protrudes more than a predetermined length from the fixed column, the movable column does not detach from the fixed column by positioning the movable column at the protruding position.

[0014] Here, it is preferable that the anti-detachment rotating member located at the protruding position rotates to the retracted position by being pressed by the movable column when the movable column slides toward the direction of the fixed column.

[0015] Here, the movable columns are provided in pairs and spaced apart from each other by a predetermined distance, and include at least one connecting beam or connecting wall connecting the pair of movable columns, and it is preferable that a fork insertion opening is provided at the bottom of the connecting beam or connecting wall located at the bottom of the connecting beam, so that a forklift fork can be inserted therein.

[0016] Here, a support member capable of supporting the lower end of the movable column is disposed at the lower end of the fixed column, and it is preferable that the movable column is supported by the support member when it is in the contracted position.

[0017] Here, when the movable column is in the contracted position, it is preferable that the inner ceiling of the hollow of the movable column be supported by the upper end of the fixed column.

[0018] Here, it may include a first locking part disposed on the outer surface of the other end of the fixed column; and a second locking part disposed on the inner surface of the hollow of one end of the movable column, which can be locked by being caught on the first locking part.

[0019] According to the present invention, the invention comprises: a base capable of supporting a cargo; a fixed column, which is a rod-shaped member extending along a first central axis and has one end coupled to the base; a movable column, which is a rod-shaped member extending along the first central axis and has one end coupled to the fixed column so as to be slidably movable, and is configured to be reciprocally movable along the first central axis between a contracted position and an extended position; and a locking device capable of fixing the movable column at any position between the contracted position and the extended position. The movable column comprises a pipe-shaped member having a hollow interior, and since the fixed column is inserted into the hollow of the movable column and is slidably movable relative to the fixed column, the invention has the effect of easily implementing a watertight structure in which it is difficult for rainwater or seawater to penetrate between the fixed column and the movable column even in rainy weather or during maritime transport.

[0020] FIG. 1 is a perspective view of a cargo container which is an embodiment of the present invention.

[0021] Figure 2 is a magnified view of a part of the cargo container shown in Figure 1.

[0022] Figure 3 is a magnified view of another part of the cargo container shown in Figure 1.

[0023] Figure 4 is a drawing showing the state in which the movable column of the cargo container illustrated in Figure 1 has risen to an extended position.

[0024] Figure 5 is a partial enlarged view of the cargo container shown in Figure 4.

[0025] Figure 6 is an enlarged view of part VI of the cargo container shown in Figure 3.

[0026] Figure 7 is an enlarged view of the locking device shown in Figure 1.

[0027] FIG. 8 is a drawing showing the state in which the locking member illustrated in FIG. 7 has moved to the locked position.

[0028] FIG. 9 is an exploded perspective view showing the fixed column and the movable column shown in FIG. 1 separated from each other.

[0029] FIG. 10 is a drawing showing a state in which a movable column is restrained and unable to move upward and detach as a rotating member for preventing detachment, mounted inside the fixed column shown in FIG. 1, rotates to a protruding position.

[0030] FIG. 11 is a cross-sectional view showing the state in which the anti-detachment rotating member illustrated in FIG. 10 is in the retracted position.

[0031] FIG. 12 is a cross-sectional view showing the state in which the anti-detachment rotating member illustrated in FIG. 10 is in a protruding position.

[0032] FIG. 13 is a drawing showing a state in which a first locking part disposed at the other end of the fixed column is locked in place with a second locking part disposed on the inner circumference of the hollow of one end of the movable column.

[0033] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0034] FIG. 1 is a perspective view of a cargo container according to one embodiment of the present invention, FIG. 2 is a partial enlarged view of a part of the cargo container shown in FIG. 1, FIG. 3 is a partial enlarged view of another part of the cargo container shown in FIG. 1.

[0035] Referring to FIGS. 1 to 3, a cargo container (100) according to a preferred embodiment of the present invention is a steel container (freight container, cargo container) widely used for maritime cargo transport, and is configured to include a base (10), a fixed column (20), a movable column (30), and a locking device (40). In this embodiment, the cargo container (100) is provided in the form of a flat rack container without a ceiling and side walls, as shown in FIG. 1.

[0036]

[0037] The above base (10) is a rectangular steel frame structure capable of supporting cargo on its upper surface, and is manufactured by welding together several beam and plate members.

[0038] In this embodiment, the base (10) is provided as a rectangular steel frame structure that extends along the third central axis (C3) as shown in FIG. 1.

[0039]

[0040] The above fixed column (20) is a rod-shaped steel member extending upward along the first central axis (C1) as shown in FIG. 4, and its lower end is connected to the base (10). Here, the first central axis (C1) intersects the third central axis (C3) perpendicularly.

[0041] The above fixed column (20) includes a square pipe-shaped metal member having a hollow (24) inside, as shown in FIG. 9.

[0042] The above fixed pillars (20) are provided in pairs and are each positioned at both ends of the base (10) as shown in FIG. 4.

[0043] In this embodiment, the fixed column (20) is provided to be reciprocally rotatable between a storage position folded inward toward the base (10) and a usage position erected vertically from the base (10) as shown in FIG. 4. Here, the coupling structure between the fixed column (20) and the base (10) is widely known to those skilled in the art, so a detailed description thereof will be omitted.

[0044] A through hole (21) is formed in the upper part of the fixed column (20) as shown in FIG. 9.

[0045] The above through hole (21) is a hole through which a part of the anti-detachment rotating member (22), which will be described later as shown in FIG. 12, can pass.

[0046] In the above fixed column (20), a plurality of locking holes (42) are formed in a manner arranged along the first central axis (C1).

[0047] The locking hole (42) is a hole through which a locking member (41), which will be described later as shown in FIG. 8, can be inserted and passed.

[0048] At the lower end of the fixed column (20), a support member (11) is provided to support the lower end of the movable column (30) as shown in FIG. 6.

[0049] The above support member (11) is a metal member positioned at the upper end of a short post positioned at the four corners of the base (10), and has a shape capable of supporting the lower end of the movable column (30).

[0050]

[0051] The above-mentioned movable column (30) is a rod-shaped steel member extending upward along the first central axis (C1) of the base (10) as shown in FIG. 4, and its lower end is slidably connected to the fixed column (20).

[0052] The above-mentioned movable column (30) is configured to be reciprocally movable along the first central axis (C1) between a contracted position as shown in FIG. 1 and an extended position as shown in FIG. 4.

[0053] As shown in FIG. 1, when the movable column (30) is in a contracted position, the height from the upper surface of the base (10) to the end of the movable column (30) has a value of H1, and as shown in FIG. 4, when the movable column (30) is in an extended position, the height from the upper surface of the base (10) to the end of the movable column (30) has a value of H2.

[0054] The above-mentioned movable column (30) is supported by the support member (11) when it is fully lowered downward as shown in FIG. 6 and is in the contracted position.

[0055] In this embodiment, the movable column (30) includes a pipe-shaped member having a hollow (31) inside, as shown in FIG. 8, and the fixed column (20) is inserted into the hollow (31) of the movable column (30).

[0056] Accordingly, the movable column (30) can slide along the first central axis (C1) while wrapping the fixed column (20) from the outside.

[0057] In this embodiment, the upper part of the movable column (30) is provided with a watertight structure so that rainwater or seawater cannot penetrate.

[0058] In this embodiment, when the movable column (30) is in the contracted position, the inner ceiling (not shown) of the hollow (31) of the movable column (30) is supported by the upper end of the fixed column (20). Here, the inner ceiling (not shown) of the hollow (31) is formed by a structure shown on the upper end of the movable column (30) in FIG. 9 and is a watertight structure.

[0059] In this embodiment, the movable column (30) is provided in two pairs, similar to the fixed column (20), and is coupled to each fixed column (20).

[0060] Each pair of movable columns (30) is connected to each other by two connecting beams (32) as shown in FIG. 5.

[0061] One of the two connecting beams (32) connects the upper part of the movable column (30) to the other, and the other of the two connecting beams (32) connects the lower part of the movable column (30) to the other.

[0062] A connecting wall (33) is placed in the rectangular space formed by the two connecting beams (32) and the pair of movable columns (30).

[0063] The above connecting wall (33) is a structure capable of restraining the side of a cargo placed on the upper surface of the base (10), and corresponds to a so-called end wall.

[0064] In this embodiment, a pair of fork insertion holes (34) are formed in the connecting beam (32) located at the bottom of the connecting beam (32).

[0065] The fork insertion hole (34) is a hole formed so that a fork of heavy equipment, such as a forklift, can be inserted.

[0066] A through hole (35) is formed in the lower part of the above-mentioned movable column (30), as shown in FIG. 9.

[0067] The above through hole (35) is a hole through which a part of the anti-detachment rotating member (22), which will be described later as shown in FIG. 12, can pass.

[0068] A locking hole (43) is formed at the lower end of the above-mentioned movable column (30), as shown in FIG. 9.

[0069] The locking hole (43) is a hole through which a locking member (41), which will be described later as shown in FIG. 8, can be inserted and passed.

[0070] As shown in FIGS. 9 and FIGS. 11, a rotating member (22) for preventing detachment is rotatably mounted around a fourth central axis (C4) at the upper end of the hollow (24) of the fixed column (20).

[0071] The above-mentioned rotating member (22) for preventing detachment is a flat member having a fan shape and is provided to be rotatable between the retracted position shown in FIG. 11 and the protruding position shown in FIG. 12.

[0072] As shown in FIG. 11, the above-mentioned rotating member (22) for preventing detachment has its center of gravity (CG) positioned to the right of the fourth central axis (C4).

[0073] Accordingly, as shown in FIG. 11, the anti-detachment rotating member (22) in the retracted position receives a gravitational force that attempts to rotate clockwise around the fourth central axis (C4). However, as shown in FIG. 11, the inner surface of the movable column (30) applies an external force to the anti-detachment rotating member (22), thereby restricting the clockwise rotation of the anti-detachment rotating member (22), and the retracted position of the anti-detachment rotating member (22) remains unchanged.

[0074] Meanwhile, when the above-mentioned movable column (30) rises sufficiently along the first central axis (C1) and the through hole (35) of the movable column (30) and the through hole (21) of the fixed column (20) face each other as shown in FIG. 12, the anti-detachment rotating member (22) passes through the through hole (21) and the through hole (35) in sequence and is positioned at the protruding position. At this time, the rotation restraint part (222) formed at the upper end of the anti-detachment rotating member (22) contacts the upper end of the through hole (21), thereby restricting the clockwise rotation of the anti-detachment rotating member (22), and the protruding position of the anti-detachment rotating member (22) is maintained.

[0075] As shown in FIG. 12, when the movable column (30) is raised further while the anti-detachment rotating member (22) is in a protruding position, the lower end of the through hole (35) of the movable column (30) catches on the toothed part (221) of the anti-detachment rotating member (22), thereby restricting the upward movement of the movable column (30).

[0076] That is, the above-mentioned rotating member (22) for preventing detachment is biased by gravity so as to be able to rotate between an inward position maintained by an external force by the above-mentioned movable column (30) and an outward position maintained by gravity when the external force is removed, and is provided to restrain the upward movement of the above-mentioned movable column (30) in the outward position.

[0077] In addition, when the movable column (30) protrudes more than a predetermined length from the fixed column (20), as shown in FIG. 12, the anti-detachment rotating member (22) is positioned at the protruding position so that the movable column (30) does not detach from the fixed column (20).

[0078] Meanwhile, as shown in FIG. 12, when the anti-detachment rotating member (22) is in the protruding position, if the movable column (30) is lowered downward toward the fixed column (20), the upper end of the through hole (35) of the movable column (30) presses the left inclined portion (223) of the anti-detachment rotating member (22), thereby causing the anti-detachment rotating member (22) to rotate counterclockwise and return to the retracted position as shown in FIG. 11, and the position is maintained.

[0079] In this embodiment, the movable column (30) is provided with a rotating member (22) for preventing detachment so that it does not detach from the fixed column (20), but instead of using the rotating member (22) for preventing detachment, a structure for preventing detachment including a first locking part (23) and a second locking part (36) as shown in FIG. 13 may be adopted.

[0080] Here, the first catch portion (23) is a protrusion positioned on the outer surface of the upper part of the fixed column (20), and the second catch portion (36) is a protrusion positioned on the inner surface of the hollow (31) of the lower part of the movable column (30), and is a part that can be caught and restrained by the first catch portion (23).

[0081]

[0082] The locking device (40) is a locking device that can fix the movable column (30) so that it cannot slide against the fixed column (20) at any position between the contracted position and the extended position, as shown in FIG. 8.

[0083] The locking device (40) includes a locking member (41) configured to enable reciprocating sliding motion along a second central axis (C2) as shown in FIG. 7. Here, the second central axis (C2) intersects the first central axis (C1) and the third central axis (C3) perpendicularly to each other.

[0084] In this embodiment, the locking member (41) is a rod-shaped member extended along the second central axis (C2), and is capable of reciprocating sliding motion along the second central axis (C2) between a locked position as shown in FIG. 8 and an unlocked position as shown in FIG. 7.

[0085] The lock position is a position in which the movable column (30) is fixed relative to the fixed column (20) as shown in FIG. 8, and the release position is a position in which the movable column (30) can slide along the first central axis (C1) relative to the fixed column (20) as shown in FIG. 7.

[0086] In the above locking position, the locking member (41) completely penetrates the locking hole (42) of the fixed column (20) and the locking hole (43) of the movable column (30) simultaneously, as shown in FIG. 8.

[0087] In the above release position, the locking member (41) does not penetrate the locking hole (42) of the fixed column (20) and the locking hole (43) of the movable column (30) at all, as shown in FIG. 7.

[0088] In this embodiment, the locking member (41) is placed in the internal space (321) of the connecting member (32) located at the bottom of the connecting members (32), as shown in FIGS. 6 and 7, so as not to protrude from the connecting member (32).

[0089] Accordingly, since the locking member (41) is connected to the movable column (30) by the connecting member (32), it can slide up and down along the first central axis (C1) together with the movable column (30).

[0090] One end of the locking member (41) is equipped with a handle (46) that can be grasped by a worker, as shown in FIG. 7.

[0091] In the middle portion of the locking member (41), as shown in FIG. 7, a stopper (47) is provided that protrudes from the surface of the locking member (41).

[0092] The stopper (47) is provided so as to be restrained by a partition (322) that is vertically provided in the internal space (321) of the connecting beam (32) as shown in FIG. 7.

[0093] Therefore, when the worker pulls the locking member (41) to the left side of FIG. 7 using the handle (46), the stopper (47) is restrained by the partition (322), thereby restricting the locking member (41) from moving excessively to the left.

[0094] On the upper surface of the locking member (41), a concavely recessed locking groove (44) is formed as shown in FIG. 7.

[0095] At the upper part of the internal space (321) of the above connecting beam (32), a latch (45) is installed that can be detachably inserted into the locking groove (44) as shown in FIG. 8.

[0096] The above latch (45) is provided to be rotatable around the fifth central layer (C5) as shown in FIGS. 8 and 11, and is provided to be automatically inserted into the locking groove (44) by gravity when the locking member (41) reaches the locking position.

[0097] That is, when the locking member (41) is in the unlocked position, the latch (45) is in contact with the top of the locking member (41) and maintains an oblique position as shown in FIG. 11, and when the locking member (41) is in the locked position, it is automatically inserted into the locking groove (44) by gravity as shown in FIG. 8.

[0098]

[0099] Below, an example of a method for using a cargo container (100) of the configuration described above will be explained.

[0100] First, if the height of the cargo placed on the upper surface of the base (10) is lower than the height (H1) of the movable column (30) in the contracted position as shown in FIG. 1, the cargo can be loaded onto the upper surface of the base (10) in the state of FIG. 1 without raising the movable column (30) from the fixed column (20). At this time, the locking member (41) is in the locked position.

[0101] If the height of the cargo placed on the upper surface of the base (10) is higher than the height (H1) of the movable column (30) in the contracted position as shown in FIG. 1, the movable column (30) is raised from the fixed column (20) to a desired height, and the locking member (41) is positioned in the locked position, and then the cargo is loaded onto the upper surface of the base (10). At this time, the movable column (30) is raised or lowered while the fork of the forklift is inserted into the fork insertion port (34).

[0102] If the forklift raises the movable column (30) above an allowed height, the anti-detachment rotating member (22), which is rotated to a protruding position by gravity, restrains the rise of the movable column (30), thereby preventing the movable column (30) from separating from the fixed column (20).

[0103]

[0104] A cargo container (100) of the above configuration comprises: a base (10) capable of supporting and holding cargo; a fixed column (20) which is a rod-shaped member extending along a first central axis (C1), with one end connected to the base (10); and a movable column (30) which is a rod-shaped member extending along the first central axis (C1), with one end connected to the fixed column (20) so as to be slidably movable, and configured to be reciprocally movable along the first central axis (C1) between a contracted position and an extended position. The device includes a locking device (40) capable of fixing the movable column (30) at any position between the contracted position and the extended position; wherein the movable column (30) comprises a pipe-shaped member having a hollow (31) inside, and the fixed column (20) is inserted into the hollow (31) of the movable column (30) and is capable of sliding movement relative to the fixed column (20), thereby allowing cargo of various heights to be safely loaded and multi-stage stacking of containers loaded with cargo to be possible, and there is an advantage in easily implementing a watertight structure in which rainwater or seawater is difficult to penetrate between the fixed column (20) and the movable column (30) even when it rains or during maritime transport. Therefore, there is an advantage in that rust formation and water accumulation are difficult to occur inside the hollow (31) of the movable column (30).

[0105] In addition, the cargo container (100) has the advantage of being able to implement the locking device (40) having a relatively simple but robust structure, by including: a locking member (41) which is configured to allow reciprocating sliding movement along a second central axis (C2) intersecting the first central axis (C1), between a locking position in which the movable column (30) is fixed relative to the fixed column (20) and a release position in which the movable column (30) is allowed to slide along the first central axis (C1) relative to the fixed column (20); and a locking hole (42) which is formed in at least one of the fixed column (20) and the movable column (30) as a hole through which the locking member (41) can pass.

[0106] Furthermore, the above cargo container (100) has the advantage of being able to slid along the first central axis (C1) together with the movable column (30) by the locking member (41) being coupled to the movable column (30), and the locking hole (42) is provided in multiple numbers on the fixed column (20) in a manner arranged along the first central axis (C1), thereby simplifying the locking structure of the fixed column (20) associated with the locking device (40). That is, most of the structure of the locking device (40) can be placed on the side of the movable column (30).

[0107] In addition, the cargo container (100) includes a pair of movable columns (30) that are spaced apart from each other by a predetermined distance, and includes at least one connecting beam (32) or connecting wall (33) that connects the pair of movable columns (30). The locking member (41) is positioned at the bottom of the connecting beam (32) or the connecting wall (33) that is located at the bottom of the connecting beam (32), so that two movable columns (30) can be raised and lowered simultaneously at once using a forklift while the movable columns (30) are in a vertical position. Additionally, since the locking member (41) is located at the height of a worker while the movable columns (30) are in a vertical position, it is easy for a worker to operate the locking member (41).

[0108] And the above cargo container (100) has the advantage that the movable column (30) is provided in a pair and is spaced apart from each other by a predetermined distance, and includes at least one connecting beam (32) or connecting wall (33) connecting the pair of movable columns (30), and the locking member (41) is placed inside one of the connecting beam (32) or connecting wall (33) so as not to protrude from the connecting beam (32) or connecting wall (33), so there is no risk of the locking member (41) being damaged due to a collision with heavy cargo placed on the base (10).

[0109] In addition, the cargo container (100) has a concavely recessed locking groove (44) formed on one side of the locking member (41), and a latch (45) that can be detachably inserted into the locking groove (44) is disposed on the bottom of the connecting member (32) or the bottom of the connecting wall (33), and when the locking member (41) reaches the locking position, the latch (45) is automatically inserted into the locking groove (44) by gravity, so the locking member (41) does not return to the unlocked position due to unintended external force.

[0110] The above cargo container (100) is a member rotatably mounted on the above fixed column (20), and is biased by gravity so as to be able to rotate between a retracted position maintained by an external force and a protruding position maintained by gravity when the external force is removed, and includes a non-detachment rotating member (22) provided to restrain the sliding movement of the above movable column (30) at the protruding position. When the above movable column (30) protrudes more than a predetermined length from the above fixed column (20), the non-detachment rotating member (22) is positioned at the protruding position, so that the above movable column (30) does not detach from the above fixed column (20), thus having the advantage that when a worker drives a forklift to raise the above movable column (30), the above movable column (30) does not unintentionally detach from the above fixed column (20).

[0111] In addition, the cargo container (100) has the advantage that when the anti-detachment rotating member (22) in the protruding position is pressed by the movable column (30) and automatically rotates to the retracted position when the movable column (30) slides downward toward the direction of the fixed column (30), the movable column (30) can be lowered without the operator having to perform any separate operation on the anti-detachment rotating member (22) when the anti-detachment rotating member (22) is in the protruding position. That is, the anti-detachment rotating member (22) restricts only the upward movement of the movable column (30).

[0112] And the above cargo container (100) has a pair of movable columns (30) that are spaced apart from each other by a predetermined distance, and includes at least one connecting beam (32) or connecting wall (33) that connects the pair of movable columns (30). Since a fork insertion opening (34) formed so that a forklift fork can be inserted is provided at the bottom of the connecting beam (32) or the connecting wall (33) located at the bottom of the connecting beam (32) or the connecting wall (33), there is an advantage that a worker can easily raise or lower the movable columns (30) using a forklift.

[0113] In addition, the cargo container (100) has a support member (11) positioned at the lower end of the fixed column (20) to support the lower end of the movable column (30). When the movable column (30) is in the contracted position, it is supported by the support member (11). Therefore, the heavy load of other containers stacked above the movable column (30) is transferred to the support member (11) via the movable column (30), thereby improving the load-bearing capacity.

[0114] And, the above cargo container (100) has the advantage of having a load-carrying capacity that is further improved compared to the case where the load is borne only by the movable column (30), because when the movable column (30) is in the contracted position, the inner ceiling (not shown) of the hollow (31) of the movable column (30) is supported by the upper part of the fixed column (20), so that the heavy load of other containers stacked above the movable column (30) is transmitted to the fixed column (20) through the movable column (30).

[0115]

[0116] In this embodiment, the connecting wall (33) is positioned between the pair of movable columns (30), and as shown in FIG. 5, the connecting wall is not positioned between the pair of fixed columns (20), but it is of course possible to position the connecting wall between the pair of fixed columns (20) as well.

[0117] In this embodiment, the fixed column (20) is provided in a "folding type" that can be folded inward toward the base (10), but it is also known that it can be provided in a form fixed vertically toward the base (10).

[0118] In this embodiment, the locking member (41) is positioned within the internal space (321) of the connecting member (32) located at the bottom of the connecting members (32) so as not to protrude outward, but it is also possible for it to be positioned within the lower part of the connecting wall (33) so as not to protrude outward.

[0119] In this embodiment, the upper end of the through hole (35) of the movable column (30) is lowered and directly presses the left inclined portion (223) of the anti-detachment rotating member (22), thereby causing the anti-detachment rotating member (22) to return to the retracted position; however, it is also possible that the downward movement of the movable column (30) may indirectly rotate the anti-detachment rotating member (22) to the retracted position.

[0120] The present invention has been described above. However, the technical scope of the present invention is not limited to the contents described in the embodiments above, and it is evident that equivalent configurations modified or changed by those skilled in the art do not deviate from the scope of the technical concept of the present invention.

Claims

1. A base capable of supporting cargo; A rod-shaped member extending along a first central axis, a fixed column having one end connected to the base; A rod-shaped member extending along the first central axis, wherein one end is slidably coupled to the fixed column and is configured to move back and forth along the first central axis between a contracted position and an extended position; A locking device capable of fixing the above-mentioned movable column at any position between the above-mentioned contraction position and the above-mentioned extension position; is included, A cargo container characterized in that the above-described movable column includes a pipe-shaped member having a hollow interior, and is capable of sliding relative to the fixed column while the fixed column is inserted into the hollow of the movable column.

2. In Paragraph 1, The above locking device is, A locking member configured to enable reciprocating sliding movement along a second central axis intersecting the first central axis, between a locking position that fixes the movable column in position relative to the fixed column and a release position that allows the movable column to slide along the first central axis relative to the fixed column; A cargo container characterized by comprising: a locking hole formed in at least one of the fixed column and the movable column, through which the locking member can pass; and at least one locking hole formed in at least one of the fixed column and the movable column.

3. In Paragraph 2, The locking member is coupled to the movable column so as to be capable of sliding along the first central axis together with the movable column, A cargo container characterized in that the above locking holes are provided in plurality on the fixed column in a manner arranged along the first central axis.

4. In Paragraph 3, The above-mentioned movable columns are provided in pairs and spaced apart from each other by a predetermined distance, and include at least one connecting beam or connecting wall connecting the pair of movable columns to each other. A cargo container characterized in that the above locking member is positioned at the bottommost connecting beam among the above connecting beams or at the bottom of the above connecting wall.

5. In Paragraph 3, The above-mentioned movable columns are provided in pairs and spaced apart from each other by a predetermined distance, and include at least one connecting beam or connecting wall connecting the pair of movable columns to each other. A cargo container characterized in that the locking member is positioned inside one of the connecting beam or connecting wall so as not to protrude from the connecting beam or connecting wall.

6. In Paragraph 1, A member rotatably mounted on the fixed column, comprising a member biased by gravity to rotate between an inlet position maintained by an external force and an outlet position maintained by gravity when the external force is removed, and a member provided to restrain the sliding movement of the movable column at the outlet position. A cargo container characterized in that when the movable column protrudes more than a predetermined length from the fixed column, the anti-detachment rotating member is positioned at the protruding position so that the movable column does not detach from the fixed column.

7. In Paragraph 6, A cargo container characterized in that the anti-detachment rotating member located in the above-mentioned protruding position rotates to the above-mentioned retracted position by being pressed by the movable column when the movable column slides toward the direction of the fixed column.

8. In Paragraph 1, The above-mentioned movable columns are provided in pairs and spaced apart from each other by a predetermined distance, and include at least one connecting beam or connecting wall connecting the pair of movable columns to each other. A cargo container characterized by having a fork insertion opening formed to allow the fork of a forklift to be inserted in the connecting beam located at the lowest of the above connecting beams or in the lower part of the above connecting wall.

9. In Paragraph 1, A support member capable of supporting the lower part of the movable column is disposed at the lower part of the fixed column, and A cargo container characterized by the fact that the above-mentioned movable column is supported by the above-mentioned support member when it is in the above-mentioned contracted position.

10. In Paragraph 1, A cargo container characterized in that, when the above-mentioned movable column is in the above-mentioned contracted position, the inner ceiling portion of the hollow of the above-mentioned movable column is supported by the upper portion of the above-mentioned fixed column.

11. In Paragraph 1, A cargo container characterized by comprising: a first locking part disposed on the outer surface of the other end of the fixed column; and a second locking part disposed on the inner surface of the hollow of one end of the movable column, which can be engaged with and restrained by the first locking part.

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