WO2014175631A1 - Dispositif d'ouverture/de fermeture automatique d'un couvercle d'un bac de chargement sur un camion-benne - Google Patents

Dispositif d'ouverture/de fermeture automatique d'un couvercle d'un bac de chargement sur un camion-benne Download PDF

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Publication number
WO2014175631A1
WO2014175631A1 PCT/KR2014/003497 KR2014003497W WO2014175631A1 WO 2014175631 A1 WO2014175631 A1 WO 2014175631A1 KR 2014003497 W KR2014003497 W KR 2014003497W WO 2014175631 A1 WO2014175631 A1 WO 2014175631A1
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WO
WIPO (PCT)
Prior art keywords
plate
rolling
cover
loading box
dump truck
Prior art date
Application number
PCT/KR2014/003497
Other languages
English (en)
Korean (ko)
Inventor
김용규
Original Assignee
Kim Young Gyu
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kim Young Gyu filed Critical Kim Young Gyu
Publication of WO2014175631A1 publication Critical patent/WO2014175631A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P7/00—Securing or covering of load on vehicles
    • B60P7/02—Covering of load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J7/00—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs
    • B60J7/02—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes
    • B60J7/06—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes with non-rigid element or elements
    • B60J7/067—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes with non-rigid element or elements sliding and winding up
    • B60J7/068—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes with non-rigid element or elements sliding and winding up for utility vehicles, e.g. of tarpaulin or roller-blind type

Definitions

  • the present invention relates to a loading box cover automatic opening and closing device which is provided in the loading box of the dump truck to prevent the load from falling, and more particularly, the winding-type rolling device is installed on the loading box and the winding-type rolling device on both sides of the loading box. And a guide rail for drawing out or winding the rolling plate from the rolled plate, so that the rolling plate can be taken out along the guide rail to easily cover the loading box, thereby preventing the loaded load from falling out and at the same time introducing rainwater.
  • the present invention relates to a cover automatic opening and closing device of a dump truck loading box to completely block dust scattering.
  • a lorry or a dump truck is provided with a cover in a loading box to conceal the load, thereby improving aesthetics and preventing the load from falling, thereby preventing road breakage and damage to adjacent vehicles.
  • a cover device is mounted to open and close the open upper surface of the loading box.
  • Conventional automatic dump truck lid cover is formed of a pair of covers mainly having a size corresponding to about half the size of the upper surface of the top of the loading box, the loading of the loading box through the rotation support shaft formed in one corner of the cover Rotating support is supported on both sides, and the driving motor is connected to one end of the rotation support shaft. As the rotation support shaft rotates, the cover rotates to cover the upper surface of the loading box. It is configured to be able to kick off (opening and closing).
  • Utility Model Registration No. 20-0340096 discloses an automatic cover device for a dump truck loading box.
  • Such automatic cover device reduces the difference between the rotational force acting on the front part of the cover and the rotational force acting on the back part of the cover, and opens and closes the cover with a relatively uniform force regardless of the position. Distortion can be prevented.
  • Patent Application No. 10-1032768 registered and filed by the applicant of the "cover automatic opening and closing device of the dump truck loading box" is a device for opening and closing the loading box is provided with a guide rail on the upper end of the folding frame installed on both sides of the loading box It is provided with a rolling plate that can cover the, consisting of a configuration to cover the loading box while sliding along the guide rail by pulling the rolling plate using a wire.
  • Patent Document 1 KR 20-0340096 (Registration No.) 2004.01.16.
  • Patent Document 2 KR 10-0654291 (Registration No.) 2006.11.29.
  • Patent Document 3 KR 10-1032768 (Registration No.) 2011.04.26.
  • the conventional stacker cover device as described above has a pair of covers that can be folded on both sides of the stacker to fold and unfold them, such a structure can be covered on the back of the stacker There was no limit.
  • the device to cover the stack by pulling the rolling plate using the wire has a problem that there is a risk of damage because the wire is exposed to some outside, which may cause inconvenience to open and close the stack.
  • the present invention has been made in order to solve the above problems, and provided with a guide rail for installing the winding-type rolling device on the front upper surface of the loading box and withdrawing or winding the rolling plate on both sides of the loading box,
  • the rolling plate provided in the edible rolling device is pulled out along the guide rail to completely cover the loading box, and roller means are provided at both ends of the rolling plate so that they can slide while stably supporting the guide rail.
  • roller means are provided at both ends of the rolling plate so that they can slide while stably supporting the guide rail.
  • Another object of the present invention is to close the upper open surface of the loading box to suppress the generation of dust and at the same time to prevent rainwater from entering the inside of the loading box during rainy weather to prevent waste from flowing to the outside to prevent contamination of the water environment around the road To make it work.
  • Still another object of the present invention is to prevent the traffic accident by preventing the load from falling on the road by making the upper opening surface of the loading box closed.
  • the present invention for achieving the above object in the opening and closing device that can automatically open and close the loading box cover of the truck,
  • Rolling plate that consists of a bottom plate, both side panels, a top plate and a top plate protruded into the upper surface of the driver's seat, the top surface is installed in the loading tray of the open truck to open and close the upper opening surface of the open storage box Winding-type rolling device to be wound or unwound, a rotating support rod installed on the outer surface of the side plate and fixedly supported to be rotatable by a first driving motor, and both ends of the rolling plate Including a guide rail of the upper side to allow the sliding reciprocating movement is inserted, and the rotary wing plate to be rotated up and down about the rotation support rod, is installed on the end side of the connecting frame connecting the rolling plate, A driving shaft which is rotated by a second driving motor and installed at both ends of the driving shaft and rotated Plate driving means consisting of a circular drive sprocket capable of drawing or winding the track, and a rolling sleeve inserted into the guide rail and sliding, and protective supports installed on both sides and the outer circumference
  • the lid automatic opening and closing device of the dump truck loading box according to the present invention can be sealed while the rolling plate provided in the winding rolling device is pulled out along the guide rail to completely cover the upper surface of the loading box so that rainwater flows into the loading box.
  • the load loaded in the dump truck's loading box can be completely prevented from being dropped or exposed.
  • the present invention has the effect of preventing the contamination of the water environment around the road by preventing the flow of waste to the outside at the same time to suppress the occurrence of dust by making the upper opening surface of the truck loading box closed.
  • the present invention is to close the upper open surface of the loading box to prevent the load from falling on the road to prevent traffic accidents in advance, as well as the waste of the loading box is not visible from the outside to make the appearance beautiful There are advantages to it.
  • the present invention has the advantage that can be opened and closed while monitoring the rear of the loading box by installing a rear monitoring camera on the rolling plate which is a cover member of the loading box to ensure safety during the opening and closing operation.
  • FIG. 1 is a schematic perspective state diagram of a cover automatic opening and closing device of a dump truck loading box according to the present invention installed on a cover truck;
  • FIG. 2 is a schematic perspective view of a state in which a lid automatic opening and closing device of a dump truck loading box according to the present invention is operated to cover a dump truck loading box;
  • Figure 3 is a schematic exploded perspective view of the lid automatic opening and closing device of the dump truck loading box according to the present invention
  • FIG. 4 is a schematic state diagram of the guide rail and the rolling plate of the lid automatic opening and closing device of the dump truck loading box according to the present invention
  • FIG. 5 is a schematic state diagram in which a rolling plate is inserted and slides on a guide rail of a cover automatic opening and closing device of a dump truck loading box according to the present invention
  • Figure 6 is a schematic partial perspective view showing a state in which the support is provided in the drive means for rotating the guide rail of the lid automatic opening and closing device of the dump truck stack according to the present invention
  • FIG. 8 is a schematic connection and driving state diagram of the roller provided on the guide rail of the cover automatic opening and closing device of the dump truck loading box according to the present invention and the roller provided on both ends of the rolling plate,
  • FIG. 9 is a schematic state diagram in which the rolling plate of the lid automatic opening and closing device of the dump truck loading box according to the present invention is in close contact with the upper edge of the rear end of the truck loading box.
  • the lid automatic opening and closing device 100 of the dump truck loading box according to the invention is shown in Figures 1 to 4,
  • the bottom plate 111 and both side plates 112 the upper end is composed of the front plate 113 and the rear plate 114 protruding to the upper surface of the driver's seat, the upper surface is installed in the loading box 110 of the open truck And winding type rolling device 120 to be wound or unrolled rolling plate 121 to open and close the upper surface of the stacking box 110,
  • the lower side of the hollow rotating support rod 131 is fixed to be supported by the first drive motor (M1) and both ends of the rolling plate 121 It is composed of a guide rail 132 of the upper side to enable the sliding reciprocating movement while being inserted, and a support plate 133 of the intermediate portion for supporting and fixing them, being folded while being rotated up and down about the pivot support rod 131.
  • Rotating wing plate 130 to be made,
  • the drive shaft 141 is rotated by the second drive motor (M2), and is installed on both ends of the drive shaft 141 is rotated
  • a plate consisting of a circular drive sprocket 142, which is capable of pulling out or winding the rolling plate 121, and a rolling sleeve 143 for inserting the guide rail 132 and sliding along the longitudinal direction thereof.
  • Drive means 140 and
  • the driving sprocket 142 is inserted and the guide rail 132 is rotated to the upper side facing the end As the driving sprocket 142 is driven is inserted into the guide rail 132 is composed of a plate reading means 150 so that the rolling plate 121 can be drawn out.
  • the drive shaft 141 provided in the plate driving means 140 is the drive motor in a configuration in which the rotation shaft of the drive motor M2 is connected by a power transmission means 144 such as a belt means or a chain means.
  • the driving force of the M2 is transmitted to the drive shaft 141 through the power transmission means 144 to be rotated.
  • the guide rail 132 has a hollow rectangular shape having a space formed therein, and a rear end portion of the guide rail 132 is formed to be bent downward, and has a length at a central portion of an inner surface of the body portion 132a.
  • Lead rolling consists of a plurality of rolling rollers (132c) are provided with a plurality of predetermined intervals along the longitudinal direction.
  • the interval between the rolling roller 132c is made of a distance such that the sprocket gear formed on the outside of the drive sprocket 142 can be engaged with and rotated.
  • the drive sprocket 142 can be rotated by biting the rolling roller 132c, so that the drive sprocket 142 withdraws the rolling plate 121 to the rear of the loading box to cover the upper surface It becomes the number.
  • the inlet portion of the guide rail 132 is in contact with each other and the outlet of the plate reading means 150 when the guide rail 132 is rotated while the driving sprocket 142 is the guide rail 132 It has a structure that is open so that it can be rotated into the body portion (132a) of the inlet.
  • the rolling sleeve 143 is inserted into the drive shaft 141 as a bearing means so as to be freely rotated, and the outer side is formed in a groove shape so that upper and lower edges of the slot cutout 132b are inserted therein. To be fitted.
  • winding means that the member provided on the outside of the body is wound while the body is rotated, and withdrawal is meant to be released from being wound on the outside of the body as the body is rotated, and is used throughout the specification.
  • the winding rolling device 120 is installed on the upper side of the front plate 113 of the stacking box 110, and the rolling plate 121 to cover or remodel the stacking box 110,
  • the drum body 124 which can be wound and received by the rolling plate 121, the drive shaft 123 for rotating the drum body 124, and the drive motor 125 for rotating the drive shaft 123.
  • the rolling plate 121 is wound around the drum body 124 while the driving shaft 123 is rotated. That is, the rolling plate 121 drawn out by the sliding motion along the guide rail 132 is slid by the driving force of the driving shaft 123 and is wound around the drum body 124.
  • the driving shaft 141 is configured to be idling so that the rolling plate 121 can be wound up and wound around the drum body 124 while being slid backwards.
  • the plate reading means 150 is formed in a hollow rectangular shape in which a space is formed inside the body portion 151 and the rolling sled while being formed along the longitudinal direction in the central portion of the inner surface of the body portion 151.
  • the slot cutout 152 for inserting the eve 143 and the inner bottom surface of the body 151 are installed on the inner bottom surface of the body 151, and the driving sprocket 142 may be engaged with each other to be read along the longitudinal direction thereof.
  • Consists of a rolling roller 153 is provided with a plurality of intervals.
  • the structure of the plate reading means 150 is made the same as the structure of the guide rail 132.
  • the driving shaft 123 is rotated according to the driving of the driving motor 125 and the rolling plate 121 is reversely slid and wound around the drum body 124 to wind up, the driving sprocket 142 is engaged with the rolling roller 153 in the body portion 151 of the plate reading means 150 is stopped and waits for the next take-out operation.
  • the guide rail 132 when the guide rail 132 is rotated and the ascending is completed, the guide rail 132 is in contact with each other and a body passage is formed so that the driving sprocket 142 is the guide rail in the plate reading means 150. (132) can be moved naturally inside.
  • the driving motor M1 is installed on the front plate 113 provided at the rear of the driver's seat of the dump truck, and the driving rotary shaft M11 and the pivot support rod 131 provided in the driving motor M1. Is connected to the chain means 160 and the driving force of the drive motor (M1) is transmitted to the rotation support rod 131 is enabled to rotate.
  • the pivot wing plate 130 can be folded upward or downwardly unfolded. This is because the pivot support rod 131 serves as a pivot shaft for pivoting the pivot vane plate 130.
  • a rotation support bar 170 is installed at the end of the driving rotation shaft M11 so as to be connected to the rotation support rod 131 so that the rotation can be freely performed while being firmly supported.
  • a locking lever 134 having a 'c' shape is provided on the support plate 133a provided at the distal end of the plurality of support plates 133 that connect the pivotal support rod 131 and the guide rail 132. Is provided.
  • the front plate 113 of the loading box 110 is provided with a solenoid valve 180 is provided with a locking rod 181 is inserted into the locking lever 134 to be locked.
  • the locking rod 181 is configured to be stretchable by the operation of the solenoid valve 180.
  • the solenoid valve 180 is operated to lock the 'c' shaped to the locking lever 134
  • the rod 181 is inserted to extend and fix the pivoting blade plate 130, thereby preventing the pivotal blade plate 130 from being rotated and opened by any external force.
  • the locking means for fixing the rotation wing plate 130 by the operating device such as a solenoid valve, the locking means of the '' 'shape to fix the locking rod 181 as described above instead of installing the lever 134, a through hole (not shown) may be formed on one side of the support plate 133a to allow the locking rod 181 to be inserted into and fixed thereto, or the locking rod 181 A locking support plate 134a is provided at an end of the support plate 133a to be positioned between the locking support plate 134a and the solenoid valve 180 to pull the locking rod 181 to support the support plate 133a. ) May be supported and fixed.
  • the locking means for fixing the rotation wing plate 130 by the operating device such as a solenoid valve, etc.
  • the operating device such as a solenoid valve, etc.
  • an elastic support spring 135 is inserted into the pivot support rod 131 provided in the pivot wing plate 130.
  • a torsion spring is installed so that one end thereof is elastically supported by the support plate 133 and the other end is supported by the side plate 112 of the loading box 110, It is not limited to this.
  • the elastic support spring 135 may be installed in each of the two at each side in the position where the support plate 133 is connected to the rotation support rod 131.
  • the rolling plate 121 covering the loading box 110 is usually formed of a structure such as a shutter to close a general building entrance and exit, but is not limited thereto.
  • the rolling plate 121 is connected to the plurality of connection frames 122 provided on both sides in succession to form a joint shape to be wound (wound) to the drum body 123 or to be withdrawn, the Between the sealing means is provided to prevent rainwater from entering the inside of the loading box from the outside.
  • both ends of the rolling plate 121 are inserted into the body parts 132a and 151 provided in the guide rail 132 and the plate reading part 150, respectively, to the rolling rollers 132c and 153.
  • a pair of sliding rollers 121a for easily sliding while contacting each other and a supporting roller 121b for sliding while supporting the inner wall surface of the guide rail 132 are provided.
  • the sliding roller 121a is the guide rail.
  • the sliding rollers in contact with the rolling rollers (132c, 153) provided on the bottom surface of the plate reading part 150, and the support roller 121b is the body of the body (132a, 151)
  • connection frame 122 provided on both sides of the rolling plate 121 and connecting them is flexible and flexible to be wound together when the rolling plate 121 is wound on the drum body 124. Used as a material.
  • an end support frame 126 having a substantially '-' shape to be in close contact with the upper edge surface of the rear plate 114 provided in the loading box 110 to the end of the connection frame 122. ) Is installed.
  • the rolling plate 121 is drawn out while sliding along the guide rail 132 provided on the pivoting blade 130 by the plate driving means 140 to cover the loading box 110, the At the rear end of the stacking box 110, the end support frame 126 is supported while being in close contact with the upper edge surface of the rear plate 114 so that the stacking box 110 can be completely blocked from the outside.
  • the end support frame 126 may be any shape of the structural surface in close contact with the upper edge surface of the back plate 114, such as a concave (concave) groove shape, in addition to the "b" shape.
  • a rear vision camera 190 is installed at the center of the end support frame 126 to draw out the rolling plate 121 or to drive the vehicle while watching the rear side. .
  • the cover automatic opening and closing device 100 of the dump truck loading box of the present invention configured as described above, as shown in Figures 1 and 2, after loading the load in the truck load cover the top and rear of the load to the outside
  • the rolling plate 121 is covered (closed) so as not to fall, and when the load is not loaded, it can be opened, and the operation procedure is performed as follows.
  • the drive motors M1 of the left and right sides provided in the front plate 113 through a control unit (not shown). ).
  • the rotating wing plate 130 is rotated to the upper side by the rotation of the rotation support rod 131 is fixed to the side plate 112 of the loading box 110 is fixed in an upward state.
  • the end of the guide rail 132 provided on the upper end of the rotating wing plate 130 is in communication with each other while coinciding with one end of the plate reading means 150.
  • the support plate 133a provided in the middle portion of the pivoting blade 130 is operated while the solenoid valve 180 is operated so that the locking rod 181 is fitted to the locking lever 134 and locked. . Therefore, the rotating wing plate 130 can be firmly fixed without being rotated (opened) by an external force.
  • the driving motor M2 is operated through a controller (not shown), the driving sprocket 142 provided at the end of the driving shaft 141 is rotated while the driving shaft 141 is rotated.
  • the rolling plate 121 connected to the drive shaft 141 is drawn out from the drum body 124 to cover the upper surface of the loading box 110.
  • the rolling plate 121 is drawn out while sliding along the guide rail 132 provided on the pivoting blade 130 by the plate driving unit 140 to cover the loading box 110.
  • the end support frame 126 is supported in close contact with the upper edge surface of the rear plate 114 at the rear end of the stacker 110 so that the stacker 110 is completely blocked from the outside.
  • the driving motor 125 provided in the wound rolling device 120 is driven.
  • the rolling plate 121 is wound around the drum body 124.
  • the driving shaft 141 provided in the plate driving means 140 is neutral and idle rotation so that the rolling plate 121 is retracted along the guide rail 132.
  • the plate driving means 140 is completely retracted and stopped by the plate reading means 150, and then the solenoid valve 180 is operated to release the locked state.
  • the present invention is provided with a guide rail for installing the winding rolling device on the front upper surface of the loading box and withdrawing or winding the rolling plate on both sides of the loading box, so that the rolling plate provided in the winding rolling device is Pull out along the guide rail to completely cover the loading box, and provided with roller means at both ends of the rolling plate so that they slide while supporting the guide rail stably, and at the same time, a rear view camera is installed at the end of the rolling plate.
  • the rolling plate can be easily and conveniently slid along the guide rail to open and close, thereby completely preventing the load loaded into the loading box from falling out or being exposed to the outside.
  • rolling plate 121a sliding roller 121b: support roller
  • drive motor 126 end support frame 127: protective support briquette
  • rotation support rod 132 guide rail 132a: body portion 132b: slot incision
  • plate driving means M2 second drive motor
  • drive shaft 142 drive sprocket 143: rolling sleeve
  • solenoid valve 181 locking rod 190: rear vision camera

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Abstract

La présente invention se rapporte à un dispositif d'ouverture/de fermeture automatique d'un couvercle d'un bac de chargement, agencé sur le bac de chargement sur un camion-benne afin d'empêcher que le matériau chargé ne tombe, et se rapporte, de façon plus précise, à un dispositif d'ouverture/de fermeture automatique d'un couvercle d'un bac de chargement sur un camion-benne, ledit dispositif comprenant : un dispositif mobile de type à enroulement installé sur le bac de chargement ; et des rails de guidage agencés sur les deux côtés du bac de chargement de telle sorte qu'une plaque mobile peut être retirée du dispositif mobile de type à enroulement, ou enroulée autour de ce dernier, ce qui permet de recouvrir facilement le bac de chargement par retrait de la plaque mobile le long des rails de guidage et, donc, d'empêcher que le matériau chargé ne tombe de ce dernier tout en empêchant complètement que le matériau chargé ne soit exposé et soumis à la pluie, et analogues.
PCT/KR2014/003497 2013-04-23 2014-04-22 Dispositif d'ouverture/de fermeture automatique d'un couvercle d'un bac de chargement sur un camion-benne WO2014175631A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020130044931A KR101298213B1 (ko) 2013-04-23 2013-04-23 덤프트럭 적재함의 덮개 자동 개폐장치
KR10-2013-0044931 2013-04-23

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WO2014175631A1 true WO2014175631A1 (fr) 2014-10-30

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PCT/KR2014/003497 WO2014175631A1 (fr) 2013-04-23 2014-04-22 Dispositif d'ouverture/de fermeture automatique d'un couvercle d'un bac de chargement sur un camion-benne

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WO (1) WO2014175631A1 (fr)

Cited By (1)

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CN108898871A (zh) * 2018-03-31 2018-11-27 无锡鼎洲电子科技有限公司 一种渣土车定位管理系统

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Publication number Priority date Publication date Assignee Title
KR101671363B1 (ko) 2015-11-03 2016-11-01 위덕대학교 산학협력단 지지대 교체가 용이한 덤프트럭 적재함 덮개장치
KR101844569B1 (ko) * 2017-07-27 2018-05-14 주식회사 아이엠아이 적재함 자동덮개의 컨베이어형 찬넬
CN110525525B (zh) * 2019-09-24 2023-12-05 江苏海丰交通设备科技有限公司 一种半挂车锁顶装置
KR102245279B1 (ko) 2020-09-21 2021-04-27 장종기 화물차량의 적재함 덮개 개폐장치

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KR20070067595A (ko) * 2005-12-25 2007-06-28 이시영 아스콘용 트럭
KR101032768B1 (ko) * 2010-11-29 2011-05-06 김용규 덤프트럭 적재함의 덮개 자동 개폐장치
KR20110069231A (ko) * 2009-12-17 2011-06-23 권승기 화물 차량용 적재함 커버장치

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KR19990000298U (ko) * 1997-06-05 1999-01-15 오문근 덤프트럭에 있어서 적재함의 덮개자동개폐장치
KR20070067595A (ko) * 2005-12-25 2007-06-28 이시영 아스콘용 트럭
KR20110069231A (ko) * 2009-12-17 2011-06-23 권승기 화물 차량용 적재함 커버장치
KR101032768B1 (ko) * 2010-11-29 2011-05-06 김용규 덤프트럭 적재함의 덮개 자동 개폐장치

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108898871A (zh) * 2018-03-31 2018-11-27 无锡鼎洲电子科技有限公司 一种渣土车定位管理系统

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