Container provided with door sealing member made of double rubber

Abstract

According to the present invention, the bottom of a container is configured as a bent steel base to prevent outside air from entering the container, and a door is configured as an airtight door to prevent outside air from entering, and thus the humidity inside the container is maintained at or below a certain level without using electrical power. Particularly, the container comprises: a rear frame provided on the rear surface of a main body of a container; a door which is mounted on the rear surface of the container and opens and closes the inside to and from the outside; and a door sealing member (300) provided between the rear frame and the door to seal the inside of the container. The door sealing member includes: a first sealing member (310) mounted on the door and made of a rubber material; and a second sealing member (320) which is made of a softer rubber material than the first sealing member, has a semicircular shape protruding upward from the upper surface of the first sealing member, and is in contact with the rear frame.

Description

Container with double rubber door seal

[0001] The present invention relates to a container having a door sealing member made of double rubber, and relates to a door sealing structure of a container that prevents outside air from entering through a gap in the container door and maintains the humidity inside the container below a certain level without separate power.

[0002] Typically, containers are used to transport a variety of cargo. Large cargo that cannot fit inside a container or cargo requiring refrigerated or frozen transport is packaged specially, and numerous specialized containers have been developed and are in use for this purpose.

[0003] For example, for large cargo that is difficult to accommodate inside a container, special packaging is done using a flat rack container with the ceiling and side walls removed or an open top container with the ceiling open.

[0004] In addition, in the case of frozen or refrigerated cargo, transportation is carried out through reefer containers equipped with an insulated interior space and a refrigerator, and the transport is carried out with the power connected to maintain cold air.

[0005] On the other hand, transportation of general cargo, excluding special containers such as the above, is mainly carried out by general containers called dry containers.

[0006] The above dry container is a welded-steel structure in which each part forming the internal space is individually assembled to provide structural strength and protection against corrosion and external impact.

[0007] The floor of the above dry container is applied with a wooden floor because wood has good elasticity and is easy to repair, and can be easily secured by nailing to the wood in case cargo of various shapes is accommodated.

[0008] However, in the case of wooden floors, if the thick nails driven into the wood are removed after the cargo is transported, large nail holes will be created in the floor, and outside air can enter through these holes. As the wood absorbs and then releases moisture, the cargo stored inside is exposed to moisture, which can easily cause damage to the cargo.

[0009] Meanwhile, technologies have been developed to construct container floors out of steel floors to address the problem of wooden floors having low strength and being prone to defects such as breakage.

[0010] For example, Chinese Utility Model Publication No. CN 2008-20044621 Y “Container base frame structure” discloses a steel floor that is detachably installed on a frame body using corrugated steel plates. That is, in the prior art document CN 2008-20044621 Y, the steel floor that is fixed to the frame body is connected with nails, bolts, or pins, and has a structure in which a sealant is filled in the connection area, so that it can be replaced and installed when necessary.

[0011] However, if fastening is done with nails, bolts, pins, etc. as described above, dehumidification inside the container becomes impossible as outside air may flow into the fastening area.

[0012] In addition, if you want to fix the position of cargo loaded inside, you can fix the cargo by driving nails into the wooden floor of a dry container with a wooden floor, but if it is made of a steel floor, there is the problem that it is difficult to drive nails.

[0013] Meanwhile, a European patent (EP3642064B1) describes a container refreezing unit (specifically, a curtain track sealing adapter) for maintaining airtightness within a container. This device maintains airtightness by injecting nitrogen gas to prevent leakage to keep vegetables fresh inside the container. Injecting nitrogen gas stops the fruits and vegetables from respiration, effectively extending their storage life by three to four times. The purpose of this invention is to prevent nitrogen gas from leaking outside. However, to prevent nitrogen gas from leaking inside the container, a curtain track unit requires separate installation work at the cargo loading site, and a separate tool must be used to insert plastic to complete the airtightness, which is cumbersome. The European patent relates to a separate airtightness unit (track, plastic curtain, and tool for inserting the plastic curtain), and the separate tool required is inconvenient to use.

[0014] Therefore, a container manufacturing technology that does not require additional work while maintaining container confidentiality is needed, and a container technology that has an airtight function in the door and allows airtight work to be completed simply by closing the door is needed.

[0015] Among the global container traffic, dry containers transported for long periods of time by sea account for an overwhelmingly high proportion. However, due to the structure, 100% perfect sealing is not achieved, so a phenomenon called container rain occurs on the inner walls of the container and the cargo, causing fatal damage to the loaded cargo, such as mold, corrosion, oxidation, and warping.

[0016] In particular, expensive machinery equipment made of metal, iron, processed goods, and other iron raw materials are stored inside standardized dry containers for import and export. Since the surface temperature of such cargo is relatively lower than the temperature of the air inside the container due to its relatively high heat capacity, there is a very high possibility of condensation occurring directly on the surface of the cargo. If air containing salt causes surface condensation during maritime transport, the possibility of oxidation or corrosion of the cargo increases further.

[0017] Therefore, in order to prevent the occurrence of the above condensation phenomenon, one or more packaging methods are used in the logistics field, including vacuum packaging of the product itself, anti-corrosion coating, and injection of anti-mold materials.

[0018] However, the anti-corrosion coating presents the problem of requiring additional work to remove the anti-corrosion coating after transport. Furthermore, the use of anti-corrosion agents does not fundamentally address condensation. Furthermore, the associated packaging and disassembly costs are ultimately passed on to the end consumer, driving up the price of purchased goods.

[0019] Various structures are used to maintain the airtightness of container doors. However, containers are subject to extremely harsh operating conditions and are typically used for approximately 15 years. This leads to corrosion of the door, and various damage to the door due to the impact of extreme operations. As a result, the sealing structure of existing container doors is damaged, preventing complete sealing even when the door is closed. Furthermore, the door frame is typically painted to prevent corrosion. However, over time, the paint peels off, causing the surface to become rough. This, in turn, hinders the sealing of the rubber material installed for the door. This in turn hinders sealing. Consequently, problems such as loss of airtightness within the container, leading to moisture absorption into the cargo, mold growth, and corrosion of metal products still persist.

[0020] The purpose of the present invention is to provide a dehumidifying container structure that prevents internal condensation by blocking air from flowing into the interior of the container through a door gap from the outside of the container, thereby securing a sealing performance of the interior space of the container, and maintaining the humidity inside the container below a certain level without power.

[0021] The purpose of the present invention is to provide a container door structure that prevents external air from entering by improving the door structure and sealing it to maintain humidity inside the container.

[0022] The present invention relates to a container having a door sealing member made of double rubber, and specifically, to a container including a rear frame provided on the rear of a container body; a door mounted on the rear of the container to open and close the inside and the outside; and a door sealing member (300) provided between the rear frame and the door to seal the inside of the container; wherein the door sealing member is characterized by including a first sealing member (310) mounted on the door and made of a rubber material; and a second sealing member (320) formed of a rubber material softer than the first sealing member and having a semicircular shape protruding upward from an upper surface of the first sealing member and in contact with the rear frame.

[0023] The first sealing member (310) is composed of a first-first member (312) that is horizontally coupled to one side of the door; a first-second member (314) that is vertically formed from one side of the first-first member in the horizontal direction; and a first-third member (316) that is vertically formed to protrude upward from the center of the upper surface of the first-first member.

[0024] It further includes a core (340) provided along the transverse longitudinal direction inside the first-first member (312); a bolt (350) provided between the first-third member (316) and the second airtight member (320), and fastened by penetrating the first-first member and the core to connect the first airtight member to the door; and a nut (355) fastened to the upper end of the bolt.

[0025] In the structure of the present invention, when the door is closed, the side of the rear frame comes into contact with the inner vertical surface of the first-second member (314), and the lower surface of the rear frame comes into contact with the upper end of the first-third member (316) and the second airtight member (320), thereby maintaining the interior of the container in an airtight state.

[0026] The present invention has the advantageous effect of preventing external air from entering the interior of a container by using a double rubber structured door sealing member as described above, thereby preventing the humidity inside the container from increasing, thereby enabling the humidity to be maintained at a certain level.

[0027] In particular, due to the double rubber structure of the present invention, the relatively soft first sealing member is primarily firmly bonded to the door to protect the relatively soft second sealing member, and even if some surface of the door is damaged during repeated door opening and closing processes, the second sealing member is structurally capable of surface contact, so that the sealing function inside the container is performed very effectively despite damage to the paint of the door and damage to some surface of the door.

[0028] Figure 1 is an overall view of a container according to the present invention.

[0029] Figure 2 is a longitudinal cross-sectional view of a container according to the present invention.

[0030] Figure 3 is a view of a door sealing member made of double rubber according to the present invention.

[0031] Figure 4 is a view of a container according to the present invention equipped with a double rubber-sealed door structure.

[0032] Figure 5 conceptually shows a closed door in a container of the present invention.

[0033] Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings.

[0034] When adding reference signs to components of each drawing, identical components are described with the same signs as much as possible even if they are shown on different drawings.

[0035] In addition, in the description of the embodiments, if it is determined that a specific description of a related known configuration or function hinders the understanding of the embodiments of the present invention, the description is simplified or omitted, and if it is described that a certain component is “equipped with” or “connected to” another component, it should be understood that the component may be directly equipped with or connected to the other component, but another component may also be “equipped with” or “connected” between each component.

[0036] The container according to the present invention uses steel members throughout its floor structure instead of the conventional wood. That is, the container floor of the present invention is formed of a steel base structure having a bent shape, and since it is formed entirely of a single steel plate, the inflow of external air through the floor is blocked, thereby providing an internal space with secured airtightness. This prevents the inflow of moisture due to the inflow of external air, thereby maintaining the humidity inside the container below a certain level. Although not shown, in order to seal the interior of the container, the door on the rear side that opens and closes the inside and outside of the container is provided with a sealing member on the edge, or an air curtain or the like is used so that when the door is closed, the inflow of air through the door edge is completely blocked.

[0037] And, in order to maintain the pressure in the space inside the container, a separate inlet passage for external air flowing into the container is formed, and a dehumidifying means is provided to remove moisture contained in the external air flowing into this inlet passage, and the biggest feature of the present invention is that the humidity inside the container can always be maintained below a certain level without a separate power supply.

[0038] Fig. 1 is an overall view of a container according to the present invention, and Fig. 2 is a longitudinal cross-sectional view of the container of the present invention, showing a structure in which the lower floor is made of a steel base, enabling the interior of the container to be sealed.

[0039] Referring to these drawings, a container (100) according to the present invention is formed with a front surface (120), an upper surface (140), and both side surfaces (160) formed of metal plates, and a rear surface formed to be openable and closable by a door (180). In addition, the bottom surface of the container is formed of a steel material and is formed with a steel base (hereinafter referred to as a 'steel base (200)') having a bending portion to block air from entering through the inner bottom. The container of the present invention has a structure in which the entire body is sealed since there is no passage for air to enter the top surface, bottom surface, side walls, etc. In the drawings, 170 is a frame member located at the rear of the container body, which is a portion of the container body that faces the door (180) when it is closed, and is a square-shaped frame, which is referred to as a 'rear frame' for convenience in the following description.

[0040] The present invention improves the container door structure so that the interior space of the container is sealed from external air when the door (180) is closed, thereby securing internal airtightness (as described below in FIG. 3). In addition, the steel base of the lower floor of the container is structured so that a corrugated steel plate of a certain width is welded on the side, so that the interior space is completely sealed.

[0041] The metal plates forming the front (120), upper surface (140) and both side surfaces (160) of the above-mentioned internal space are each welded to the frame and integrated, and the lower portions (160) of the both side surfaces are mutually connected using the edges and bends of the steel base (200).

[0042] To this end, side beams (162) are positioned at the lower portions of the two side surfaces (160), and the side beams (162) are formed by bending to have a step (163) at the upper portion. In addition, a bendable joint (212) for joining is provided at the side end portions of the steel base (200). The joints (212) of the steel base (200) secured to the lower portions of the two side surfaces (160) and the step (163) are welded together and integrated, so that the inflow of outside air through the edge of the steel base (200) can be prevented. The steel base (200) according to the present invention does not form holes such as nails or rivets that can communicate with outside air, but is formed integrally by welding using the step (163) and the joints (212), thereby completely blocking the inside and the outside, thereby blocking the inflow of outside air.

[0043] The present invention maintains internal humidity below a certain level by blocking external air from entering the container by configuring the container floor with a steel base in a bent shape. That is, since the floor constituting the internal space of a container was previously made of wood, external air could enter through the wood, making it difficult to control the humidity in the internal space of the container. The present invention fundamentally blocks the inflow of external air through the container floor by constructing the floor with a steel base made of a steel material.

[0044] Fig. 3 shows a door sealing member made of double rubber according to the present invention, Fig. 4 shows a container according to the present invention equipped with a sealing door structure using double rubber, and Fig. 5 conceptually shows a closed door in a container according to the present invention.

[0045] Looking at the present invention in detail with reference to the drawings, first, the present invention comprises a door sealing member (300) made of double rubber, which is provided between a rear frame (170) provided on the rear of the container body and a container door (180), thereby sealing the interior of the container when the door is closed. The door sealing member is attached to the edge of the door using bolts (described below).

[0046] The above door sealing member (300) is manufactured using two rubber materials having different properties and is manufactured in a form in which they are integrally combined. That is, a first sealing member (310) made of a relatively hard rubber material and a second sealing member (320) made of a relatively soft rubber material are integrally combined. In addition, when the door sealing member is bolted to the door, the first sealing member (310) made of a relatively hard rubber material is coupled by making contact with the door. In addition, during the door closing process, the first sealing member (310) made of a relatively hard rubber material is configured so as not to make direct contact with the rear frame (170), while the second sealing member (320) made of a relatively soft rubber material is configured so as to make direct contact with the rear frame (170).

[0047] The door sealing member (300) illustrated in FIGS. 4 and 5 is mounted on the frame of the container door (180) using bolts, and is mounted on the upper surface of the frame of the container door. In addition, the directions such as 'horizontal', 'vertical', 'left', and 'right' mentioned in the following description do not mean absolute directions, and are merely expressions for convenience of explanation based on the drawings (i.e., expressions based on the frame of the door sealing member mounted on the upper surface of the frame of the container door).

[0048] The door sealing member (300) of the present invention is made of double rubber and is installed between the rear frame (170) provided on the rear of the container body and the door (180) to seal the interior of the container. The door sealing member is made of two types of rubber, a hard material and a soft material. That is, it is characterized by being made of a first sealing member (310) mounted on the door and made of a rubber material, and a second sealing member (320) made of a rubber material that is softer than the first sealing member, and formed in a semicircular shape that protrudes upward from the upper surface of the first sealing member and comes into contact with the rear frame.

[0049] The above first sealing member (310) is composed of a first-first member (312) that is horizontally coupled to one side of the door, a first-second member (314) that is vertically formed from one side of the horizontal direction of the first-first member, and a first-third member (316) that is vertically formed by protruding upward from the center of the upper surface of the first-first member.

[0050] And, in order to firmly attach the door sealing member, a core (340) is provided along the transverse longitudinal direction inside the first-first member (312), and a bolt (350) is provided between the first-third member (316) and the second sealing member (320), and is fastened by penetrating through the first-first member and the core. The bolt is fastened using a nut (355) on the upper end of the bolt in order to attach the first sealing member to the door.

[0051] In the structure of the present invention, when the door is closed, the side of the rear frame comes into contact with the inner vertical surface of the first-second member (314), and the lower surface of the rear frame comes into contact with the upper end of the first-third member (316) and the second airtight member (320), thereby maintaining the interior of the container in an airtight state.

[0052] The present invention utilizes this structure to improve the sealing function of a rubber door sealing member provided between a container door and a rear frame and to increase durability when repeated door opening and closing operations occur.

[0053] That is, due to the double rubber structure of the present invention, the relatively soft first sealing member is primarily firmly bonded to the door to protect the relatively soft second sealing member, and even if some surface of the second sealing member is damaged during repeated door opening and closing processes, the second sealing member is structurally capable of surface contact, so that it performs the sealing function inside the container very effectively despite damage to the paint of the door and damage to some surface of the door.

[0054] The present invention utilizes a steel base for the container floor and an airtight structure for the door, thereby completely sealing the interior of the container and preventing moisture from entering due to external airflow, thereby maintaining the humidity inside the container below a required level. In particular, the present invention is a non-powered dehumidifying container capable of dehumidifying without using a power source for dehumidification, such as a dehumidifying device for dehumidifying the interior of the container. A dehumidifying agent may also be appropriately placed in the required locations within the container for dehumidification.

[0055] The present invention prevents outside air from entering the interior of the container through the door by forming a container door with an airtight door structure, thereby controlling the humidity inside the container to a certain level or lower.

Claims

1. Rear frame provided on the rear of the container body; A door mounted on the rear of the container to open and close the inside and outside; and It includes a door sealing member (300) provided between the rear frame and the door to seal the inside of the container; The above door sealing member is, A first sealing member (310) mounted on the above door and made of rubber material; A container equipped with a double rubber door sealing member, characterized in that it is made of a softer rubber material than the first sealing member, is formed in a semicircular shape protruding upward from the upper surface of the first sealing member, and is made of a second sealing member (320) that comes into contact with the rear frame.

2. In the first paragraph, the first confidential member (310) is A first-first member (312) that is horizontally joined to one side of the above door; A first-second member (314) formed vertically from one transverse end of the first-first member; and A container equipped with a double rubber door sealing member, characterized in that it comprises a 1-3 member (316) formed by protruding vertically upward from the center of the upper surface of the 1-1 member.

3. In paragraph 2, A core material (340) provided along the transverse longitudinal direction inside the above-mentioned first-first member (312); A bolt (350) provided between the first-third member (316) and the second airtight member (320), and fastened by penetrating the first-first member and the core material to connect the first airtight member to the door; and A container having a double rubber door sealing member, characterized in that it further includes a nut (355) fastened to the upper end of the bolt.

4. In paragraph 3, During the closing process of the above door, The side of the above rear frame is in contact with the inner vertical surface of the first-second member (314), A container equipped with a double rubber door sealing member characterized in that the lower surface of the rear frame is in contact with the upper portion of the first-third member (316) and the second sealing member (320) to maintain the interior of the container in an airtight state.

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