KR20110060009A - Cover device of belt conveyor - Google Patents

Cover device of belt conveyor Download PDF

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Publication number
KR20110060009A
KR20110060009A KR1020090116474A KR20090116474A KR20110060009A KR 20110060009 A KR20110060009 A KR 20110060009A KR 1020090116474 A KR1020090116474 A KR 1020090116474A KR 20090116474 A KR20090116474 A KR 20090116474A KR 20110060009 A KR20110060009 A KR 20110060009A
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KR
South Korea
Prior art keywords
belt conveyor
cover
opening
cover device
open
Prior art date
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KR1020090116474A
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Korean (ko)
Inventor
김영식
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현대제철 주식회사
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Priority to KR1020090116474A priority Critical patent/KR20110060009A/en
Publication of KR20110060009A publication Critical patent/KR20110060009A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
    • B65G21/08—Protective roofs or arch supports therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G67/00—Loading or unloading vehicles
    • B65G67/60—Loading or unloading ships
    • B65G67/606—Loading or unloading ships using devices specially adapted for bulk material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
    • B65G69/18—Preventing escape of dust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/04—Bulk
    • B65G2201/045—Sand, soil and mineral ore
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2812/00—Indexing codes relating to the kind or type of conveyors
    • B65G2812/02—Belt or chain conveyors
    • B65G2812/02009—Common features for belt or chain conveyors
    • B65G2812/02108—Protection means

Abstract

PURPOSE: A cover device of a belt conveyor is provided to shorten working hours for maintenance of a belt conveyor and to cut down maintenance cost by operating an open portion with a driving portion to open and close the side of a cover portion automatically. CONSTITUTION: A cover device of a belt conveyor comprises; a cover portion(20) installed along a belt conveyor(10) and covering the outside of the belt conveyor; an open portion(30) opening and closing the cover portion and hinged to the side of the cover portion, and rotated to open and close the side of the cover portion; and a traction portion(40) connected to the open portion to lift up the open portion and provided with a wire member(42), a driving portion(50), a rotating member(52) and a driving motor(54).

Description

벨트컨베이어의 커버장치{COVER DEVICE OF BELT CONVEYOR}Cover Device of Belt Conveyor {COVER DEVICE OF BELT CONVEYOR}

본 발명은 벨트컨베이어의 커버장치에 관한 것으로서, 보다 상세하게는 커버부의 개폐가 이루어지는 벨트컨베이어의 커버장치에 관한 것이다.The present invention relates to a belt conveyor cover device, and more particularly to a belt conveyor cover device that is opened and closed the cover portion.

일반적으로, 제철소에서 쓰이는 연료 및 원료 등의 운송물 수송은 해상과 육상을 통하여 이루어지며, 대다수의 경우 선박을 통하여 운송되어 언로더를 통하여 하역되고, 벨트컨베이어를 이용하여 이송된다.In general, transportation of fuels and raw materials used in steel mills is carried out by sea and on land, and in most cases, they are transported by ship, unloaded through an unloader, and conveyed by a belt conveyor.

선박에서 하역된 운송물의 장거리 이송이 필요할 경우에는, 여러 개의 벨트컨베이어를 연속적으로 배열하여 야적장으로 이송한다.If long-distance transfer of cargo unloaded from the ship is required, several belt conveyors are arranged in series to be transported to the yard.

벨트컨베이어는 무한궤도로 이루어지며, 이송벨트가 메인롤러에 의해 구동되므로 석탄이나 광석 등의 운송물을 이송한다.The belt conveyor is composed of endless tracks. Since the conveying belt is driven by the main roller, the conveying conveyer such as coal or ore is transported.

벨트컨베이어의 이송벨트를 따라서 운송물이 이송되며, 운송물을 이송하고 난 이후의 이송벨트는 메인롤러에 감겨서 회전되어 역방향으로 이동된다.The conveyed goods are conveyed along the conveyance belt of the belt conveyor, and the conveying belt after conveying the conveyed goods is wound around the main roller and rotated to move in the reverse direction.

벨트컨베이어의 상측에는 커버가 설치되어 분진의 비산을 방지하며, 빗물 등 의 유입을 차단한다.A cover is installed on the upper side of the belt conveyor to prevent dust from scattering and to block rainwater.

상기한 기술구성은 본 발명의 이해를 돕기 위한 배경기술로서, 본 발명이 속하는 기술분야에서 널리 알려진 종래기술을 의미하는 것은 아니다.The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

벨트컨베이어의 유지보수 작업이 필요할 때, 다수의 작업자가 커버를 들어서 벨트컨베이어에서 커버를 분리시키는 작업이 요구되며, 이로 인한 작업 시간의 증가 및 유지보수 비용이 증가한다. 따라서, 이를 개선할 필요성이 요청된다.When maintenance work of the belt conveyor is required, a number of workers need to lift the cover and remove the cover from the belt conveyor, which increases the working time and the maintenance cost. Therefore, there is a need for improvement.

본 발명은 상기와 같은 필요성에 의해 창출된 것으로서, 작업자가 직접 커버를 이동시키지 않고도 벨트컨베이어의 유지보수 작업을 수행할 수 있는 벨트컨베이어의 커버장치를 제공하는 데 그 목적이 있다.The present invention has been made by the necessity as described above, and an object of the present invention is to provide a belt conveyor cover device capable of performing maintenance work of a belt conveyor without the operator moving the cover directly.

본 발명에 따른 벨트컨베이어의 커버장치는: 벨트컨베이어의 외측을 커버하는 커버부 및 커버부를 개폐하는 개구부를 포함하는 것이 바람직하다.The cover device of the belt conveyor according to the present invention preferably comprises a cover portion for covering the outer side of the belt conveyor and an opening for opening and closing the cover portion.

또한 커버부는, 벨트컨베이어를 따라 설치되는 것이 바람직하다.Moreover, it is preferable that a cover part is provided along a belt conveyor.

또한 개구부는, 커버부의 측면에 힌지 연결되며, 회전동작으로 커버부의 측면을 개폐하는 것이 바람직하다.In addition, the opening is hinged to the side of the cover portion, it is preferable to open and close the side of the cover portion by the rotation operation.

또한 개구부에 연결되어 개구부를 들어올리는 견인부를 더 포함하는 것이 바람직하다.It is also preferable to further include a towing portion connected to the opening to lift the opening.

또한 견인부는, 커버부에 연결되는 와이어부재 및 와이어부재를 견인하는 구동부를 포함하는 것이 바람직하다.Also, the towing unit preferably includes a wire member connected to the cover unit and a driving unit to pull the wire member.

또한 구동부는, 와이어부재가 권선되는 회전부재 및 회전부재와 축 연결되어 회전동력을 제공하는 구동모터를 포함하는 것이 바람직하다.In addition, the drive unit, it is preferable to include a rotation member and a drive motor for axially connected to the rotating member and the rotary member is wound around the wire member to provide a rotational power.

본 발명에 따른 벨트컨베이어의 커버장치는, 구동부가 개구부를 동작시켜 커버부의 측면이 자동으로 개폐되므로, 벨트컨베이어의 유지 보수에 따른 작업시간이 단축되며, 유지보수 비용도 절감할 수 있다.In the cover device of the belt conveyor according to the present invention, since the side of the cover part is automatically opened and closed by driving the opening part, the working time according to the maintenance of the belt conveyor can be shortened, and the maintenance cost can be reduced.

이하, 첨부된 도면들을 참조하여 본 발명에 따른 벨트컨베이어의 커버장치의 일 실시예를 설명한다. 설명의 편의를 위해 제철공장에 설치되는 벨트컨베이어의 커버장치를 예로 들어 설명한다. 이 과정에서 도면에 도시된 선들의 두께나 구성요소의 크기 등은 설명의 명료성과 편의상 과장되게 도시되어 있을 수 있다. 또한, 후술되는 용어들은 본 발명에서의 기능을 고려하여 정의된 용어들로서 이는 사용자, 운용자의 의도 또는 관례에 따라 달라질 수 있다. 그러므로, 이러한 용어들에 대한 정의는 본 명세서 전반에 걸친 내용을 토대로 내려져야 할 것이다.Hereinafter, with reference to the accompanying drawings will be described an embodiment of a cover device of a belt conveyor according to the present invention. For convenience of explanation, the cover device of the belt conveyor installed in the steel mill will be described as an example. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

도 1은 본 발명의 일 실시예에 따른 벨트컨베이어의 커버장치를 개략적으로 도시한 사시도이며, 도 2는 본 발명의 일 실시예에 따른 개구부가 동작되는 상태를 도시한 사시도이다.1 is a perspective view schematically showing a cover apparatus of a belt conveyor according to an embodiment of the present invention, Figure 2 is a perspective view showing a state in which the opening operation according to an embodiment of the present invention.

도 1 또는 도 2에 도시된 바와 같이, 본 발명의 일 실시예에 따른 벨트컨베 이어의 커버장치(1)는, 벨트컨베이어(10)의 외측을 커버하는 커버부(20) 및 커버부(20)를 개폐하는 개구부(30)를 포함한다.As shown in Figure 1 or 2, the cover device 1 of the belt conveyor according to an embodiment of the present invention, the cover portion 20 and the cover portion 20 to cover the outside of the belt conveyor 10 The opening 30 is opened and closed.

벨트컨베이어의 커버장치(1)가 설치된 벨트컨베이어(10)는, 제철소에서 쓰이는 연료 및 원료 등의 운송물을 운반하는 무한궤도인 이송벨트(12)와, 이송벨트(12)의 양측에 설치되어 이송벨트(12)를 회전시키는 구동롤러(14)를 포함한다.The belt conveyor 10 provided with the cover device 1 of the belt conveyor is provided on both sides of the feed belt 12 and the feed belt 12, which are endless tracks for transporting transport goods such as fuel and raw materials used in steel mills. And a drive roller 14 for rotating the belt 12.

일측의 구동롤러(14)에서 타측의 구동롤러(14)로 이동하는 이송벨트(12)는 지지롤러(16)로 지지되어 쳐짐이 방지된다.The conveying belt 12 moving from the driving roller 14 on one side to the driving roller 14 on the other side is supported by the supporting roller 16 to prevent sagging.

커버부(20)는 벨트컨베이어(10)를 따라 설치되며, 벨트컨베이어(10)의 상측과 측면을 감싸며 설치되어 운송물이 눈이나 비 등에 노출되지 않도록 하며, 분진의 비산을 방지하는 기술사상 안에서 원호 형상을 포함한 다양한 형상으로 형성될 수 있다.The cover part 20 is installed along the belt conveyor 10, and is installed to surround the upper and side surfaces of the belt conveyor 10 so that the transported goods are not exposed to snow or rain, and arcs in the technical concept of preventing dust from scattering. It may be formed in various shapes including shapes.

커버부(20)의 일측에 구비되는 개구부(30)는, 커버부(20)와 연결되며, 수동 또는 자동으로 동작되어 커버부(20)의 일측을 개폐하는 기술사상 안에서 다양한 변화가 가능하다. The opening 30 provided at one side of the cover part 20 is connected to the cover part 20 and is operated manually or automatically to enable various changes within the technical concept of opening and closing one side of the cover part 20.

일 실시예에 따른 개구부(30)는, 커버부(20)의 측면에 힌지 연결되며, 회전동작으로 커버부(20)의 측면을 개폐한다.The opening 30 according to the exemplary embodiment is hinged to the side of the cover 20, and opens and closes the side of the cover 20 by a rotation operation.

개구부(30)는, 커버부(20)의 측면을 따라 힌지 연결되는 힌지부(34)와, 힌지부(34)에 일측이 연결되어 커버부(20)의 측면을 개폐하는 도어부재(32)를 포함한다.The opening 30 has a hinge portion 34 hinged along the side surface of the cover portion 20, and a door member 32 having one side connected to the hinge portion 34 to open and close the side surface of the cover portion 20. It includes.

개구부(30)의 개폐로 벨트컨베이어(10)의 유지보수 작업과 낙하된 운송물의 청소작업이 이루어지도록, 힌지부(34)는 이송벨트(12)의 상측에 설치된다.The hinge part 34 is installed on the upper side of the conveyance belt 12 so that the opening and closing of the opening 30 allows the maintenance work of the belt conveyor 10 and the cleaning work of the dropped transport.

개구부(30)에 연결되어 개구부(30)를 들어올리는 견인부(40)는, 커버부(20)에 연결되는 와이어부재(42) 및 와이어부재(42)를 견인하는 구동부(50)를 포함한다.The towing unit 40 connected to the opening 30 to lift the opening 30 includes a wire member 42 connected to the cover 20 and a driving unit 50 to pull the wire member 42. .

구동부(50)는 와이어부재(42)의 길이를 가변하여 개구부(30)를 동작시키는 기술사상 안에서 다양한 동력부재가 사용된다.The driving unit 50 uses various power members within the technical concept of varying the length of the wire member 42 to operate the opening 30.

일 실시예에 따른 구동부(50)는, 와이어부재(42)가 권선되는 회전부재(52) 및 회전부재(52)와 축 연결되어 회전동력을 제공하는 구동모터(54)를 포함한다.The driving unit 50 according to an embodiment includes a rotating member 52 in which the wire member 42 is wound, and a driving motor 54 axially connected to the rotating member 52 to provide rotational power.

와이어부재(42)는 개구부(30)의 도어부재(32)와 구동부(50)를 연결하는 기술사상 안에서 다양한 형상으로 설치될 수 있다. 일 실시예에 따른 와이어부재(42)는 지지부재(46)에 구비된 롤러부재(44)에 걸쳐져서 이동 방향이 전환된 상태로 설치된다.The wire member 42 may be installed in various shapes within the technical concept of connecting the door member 32 and the driving unit 50 of the opening 30. Wire member 42 according to an embodiment is installed in a state in which the moving direction is switched over the roller member 44 provided in the support member 46.

지지부재(46)와 롤러부재(44)의 형상과 설치 위치는 개구부(30)를 개폐하는 와이어부재(42)의 동작을 안내하는 기술사상 안에서 다양한 형상으로 설치된다.The shape and the installation position of the support member 46 and the roller member 44 are installed in various shapes within the technical concept of guiding the operation of the wire member 42 to open and close the opening 30.

이하에서는 첨부된 도면들을 참조하여 본 발명의 일 실시예에 따른 벨트컨베이어의 커버장치(1)의 작동상태를 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail the operating state of the cover device 1 of the belt conveyor according to an embodiment of the present invention.

사용자의 조작으로 구동모터(54)를 동작시키면, 구동모터(54)와 축연결된 회전부재(52)가 회전된다.When the driving motor 54 is operated by the user's operation, the rotating member 52 axially connected to the driving motor 54 is rotated.

회전부재(52)의 회전으로 와이어부재(42)가 회전부재(52)에 권선되면서 개구부(30)의 도어부재(32)를 힌지부(34)를 중심으로 회전시킨다.As the wire member 42 is wound around the rotating member 52 by the rotation of the rotating member 52, the door member 32 of the opening 30 is rotated about the hinge portion 34.

도어부재(32)가 상측으로 회전되어 벨트컨베이어(10)의 측면이 개방되면, 벨트컨베이어(10)의 유지보수 작업 및 운송물의 낙광 등을 청소하는 작업이 이루어진다.When the door member 32 is rotated upward and the side of the belt conveyor 10 is opened, the maintenance work of the belt conveyor 10 and the work of cleaning the falling light of the transport are performed.

유지보수 작업이 완료되면, 구동부(50)가 다시 동작되어 회전부재(52)를 반대 방향으로 회전시켜 와이어부재(42)가 풀어지면, 도어부재(32)는 하측으로 회전되어 커버부(20)의 측면을 덮는다.When the maintenance work is completed, the drive unit 50 is operated again to rotate the rotating member 52 in the opposite direction to release the wire member 42, the door member 32 is rotated to the lower side cover portion 20 Cover the sides.

상술한 바와 같은 구성에 의하면, 일 실시예에 따른 벨트컨베이어의 커버장치(1)는, 구동부(50)가 개구부(30)를 동작시켜 커버부(20)의 측면이 자동으로 개폐되므로, 벨트컨베이어(10)의 유지 보수에 따른 작업시간이 단축되며, 유지보수 비용도 절감할 수 있다.According to the configuration as described above, the belt conveyor cover device 1 according to an embodiment of the belt conveyor, since the drive unit 50 operates the opening 30 to open and close the side of the cover portion 20 automatically, Work time according to the maintenance of (10) can be shortened, and maintenance costs can be reduced.

본 발명은 도면에 도시된 실시예를 참고로 하여 설명되었으나, 이는 예시적인 것에 불과하며, 당해 기술이 속하는 분야에서 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다.Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. I will understand.

또한, 제철공장에 설치되는 벨트컨베이어의 커버장치를 예로 들어 설명하였으나, 이는 예시적인 것에 불과하며, 벨트컨베이어를 사용하는 다른 공장에도 본 발명의 벨트컨베이어의 커버장치가 사용될 수 있다.In addition, the cover apparatus of the belt conveyor installed in the steel mill was described as an example, but this is merely exemplary, the belt conveyor cover device of the present invention can be used in other factories using the belt conveyor.

따라서, 본 발명의 진정한 기술적 보호범위는 특허청구범위에 의해서 정하여져야 할 것이다.Therefore, the true technical protection scope of the present invention will be defined by the claims.

도 1은 본 발명의 일 실시예에 따른 벨트컨베이어의 커버장치를 개략적으로 도시한 사시도이다.1 is a perspective view schematically showing a cover apparatus of a belt conveyor according to an embodiment of the present invention.

도 2는 본 발명의 일 실시예에 따른 개구부가 동작되는 상태를 도시한 사시도이다.Figure 2 is a perspective view showing a state in which the opening operation according to an embodiment of the present invention.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

1: 벨트컨베이어의 커버장치1: Cover unit of belt conveyor

10: 벨트컨베이어 20: 커버부10: belt conveyor 20: cover part

30: 개구부 32: 도어부재30: opening 32: door member

34: 힌지부 40: 견인부34: hinge portion 40: towing portion

42: 와이어부재 44: 롤러부재42: wire member 44: roller member

46: 지지부재 50: 구동부46: support member 50: drive part

52: 회전부재 54: 구동모터52: rotation member 54: drive motor

Claims (6)

벨트컨베이어의 외측을 커버하는 커버부; 및A cover part covering an outer side of the belt conveyor; And 상기 커버부를 개폐하는 개구부를 포함하는 것을 특징으로 하는 벨트컨베이어의 커버장치.Covering device of the belt conveyor, characterized in that it comprises an opening for opening and closing the cover. 제 1 항에 있어서,The method of claim 1, 상기 커버부는, 상기 벨트컨베이어를 따라 설치되는 것을 특징으로 하는 벨트컨베이어의 커버장치.The cover unit, the cover device of the belt conveyor, characterized in that installed along the belt conveyor. 제 1 항에 있어서,The method of claim 1, 상기 개구부는, 상기 커버부의 측면에 힌지 연결되며, 회전동작으로 상기 커버부의 측면을 개폐하는 것을 특징으로 하는 벨트컨베이어의 커버장치.The opening is hinged to the side of the cover portion, the cover device of the belt conveyor, characterized in that for opening and closing the side of the cover portion by a rotation operation. 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,4. The method according to any one of claims 1 to 3, 상기 개구부에 연결되어 상기 개구부를 들어올리는 견인부를 더 포함하는 것을 특징으로 하는 벨트컨베이어의 커버장치.The cover device of the belt conveyor further comprises a towing portion connected to the opening for lifting the opening. 제 4 항에 있어서,The method of claim 4, wherein 상기 견인부는, 상기 커버부에 연결되는 와이어부재; 및The towing unit includes a wire member connected to the cover unit; And 상기 와이어부재를 견인하는 구동부를 포함하는 것을 특징으로 하는 벨트컨베이어의 커버장치.Cover device for a belt conveyor, characterized in that it comprises a drive unit for pulling the wire member. 제 5 항에 있어서,The method of claim 5, 상기 구동부는, 상기 와이어부재가 권선되는 회전부재; 및The driving unit, the rotating member is wound around the wire member; And 상기 회전부재와 축 연결되어 회전동력을 제공하는 구동모터를 포함하는 것을 특징으로 하는 벨트컨베이어의 커버장치.Cover device of the belt conveyor, characterized in that it comprises a drive motor axially connected to the rotating member to provide a rotational power.
KR1020090116474A 2009-11-30 2009-11-30 Cover device of belt conveyor KR20110060009A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101424429B1 (en) * 2012-10-29 2014-08-01 현대제철 주식회사 Transferring apparatus for fuel and raw material
CN109230366A (en) * 2018-07-17 2019-01-18 钟丽菊 A kind of conveying device being convenient to clean
KR20190029295A (en) * 2017-09-12 2019-03-20 문양식 A freight transport device
KR102176782B1 (en) * 2020-05-11 2020-11-09 (주)이수종합상사 opening or closing type covering apparatus of conveyor for transporting industrial wastes
KR20210130557A (en) * 2020-04-22 2021-11-01 이세희 smart opening or closing type covering apparatus of conveyor for transporting industrial wastes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101424429B1 (en) * 2012-10-29 2014-08-01 현대제철 주식회사 Transferring apparatus for fuel and raw material
KR20190029295A (en) * 2017-09-12 2019-03-20 문양식 A freight transport device
CN109230366A (en) * 2018-07-17 2019-01-18 钟丽菊 A kind of conveying device being convenient to clean
KR20210130557A (en) * 2020-04-22 2021-11-01 이세희 smart opening or closing type covering apparatus of conveyor for transporting industrial wastes
KR102176782B1 (en) * 2020-05-11 2020-11-09 (주)이수종합상사 opening or closing type covering apparatus of conveyor for transporting industrial wastes

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