WO2017158779A1 - アンテナの取付構造およびダンプトラック - Google Patents
アンテナの取付構造およびダンプトラック Download PDFInfo
- Publication number
- WO2017158779A1 WO2017158779A1 PCT/JP2016/058413 JP2016058413W WO2017158779A1 WO 2017158779 A1 WO2017158779 A1 WO 2017158779A1 JP 2016058413 W JP2016058413 W JP 2016058413W WO 2017158779 A1 WO2017158779 A1 WO 2017158779A1
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- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- dump
- dump body
- chassis
- antennas
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
- H01Q1/3283—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle side-mounted antennas, e.g. bumper-mounted, door-mounted
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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
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/04—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
- F16M13/02—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/18—Means for stabilising antennas on an unstable platform
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
- H01Q1/3275—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R2011/0001—Arrangements for holding or mounting articles, not otherwise provided for characterised by position
- B60R2011/004—Arrangements for holding or mounting articles, not otherwise provided for characterised by position outside the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R2011/0042—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means
- B60R2011/008—Adjustable or movable supports
Definitions
- the present invention relates to an antenna mounting structure and a dump truck.
- an automated guided vehicle that runs unattended by remote operation needs to be provided with both an antenna for receiving wireless radio waves for remote operation and a GPS antenna. There is a problem that it is difficult to simultaneously secure the reception accuracy of the operating radio wave and the reception accuracy of the GPS antenna.
- An object of the present invention is to provide an antenna mounting structure and a dump truck that need to mount a plurality of antennas and can ensure reception accuracy by each antenna.
- An antenna mounting structure includes a chassis and a dump body rotatably provided on the chassis, and the dump body covers the chassis over the entire length and the entire width in a plan view.
- the antenna mounting structure includes a plurality of antennas, an antenna installation portion that is rotatably attached to a side surface of the dump body, the antenna installation portion, and a rotation center of the dump body And a parallel link mechanism that maintains the posture of the antenna installation portion when the dump body is rotated. According to this invention, since the parallel link mechanism is provided, even if the dump body rotates, the parallel link mechanism rotates in accordance with this, and the attitude of the antenna installation portion can be maintained. Reception accuracy of a plurality of antennas provided in the antenna installation unit can be ensured.
- the antenna installation part is attached to the dumping side surface of the dump body.
- the parallel link mechanism has one end rotatably attached to the antenna installation portion, and is offset from the rotation center of the dump body in the direction opposite to the dumping body end portion of the dump body, and the other end is It is preferable to provide a link rod that is rotatably attached to the chassis.
- a dump truck according to the present invention includes any one of the antenna mounting structures described above.
- the antenna mounting structure is preferably provided on both sides of the side surface of the dump body.
- the antenna installation section includes an installation section main body on which a plurality of antennas are installed, and an extension section extending downward from the installation section main body, and the plurality of antennas are separated from the dumping body end of the dump body. It is preferable that it is disposed at a position and protrudes from the upper end of the dump body.
- the side view of the dump truck concerning the embodiment of the present invention.
- FIGS. 1 to 3 show a dump truck 1 according to an embodiment of the present invention.
- FIG. 1 is a side view seen from the vehicle width direction orthogonal to the traveling direction
- FIG. 2 is a side view seen from the traveling direction
- FIG. 3 is a plan view seen from the upper viewpoint.
- the X-axis, Y-axis, and Z-axis in the present embodiment shown in each drawing are in a relationship of being orthogonal to each other.
- one of the traveling directions of the dump truck 1 is the arrow direction of the X axis
- the other of the traveling direction is the opposite direction
- one of the vehicle width direction is the Y axis.
- the other of the vehicle width direction is the opposite direction
- one of the vertical directions is the arrow direction of the Z axis
- the other of the vertical directions is the opposite direction.
- the chassis 2 and the dump body 3 are formed in a rectangular shape in the forward and left and right directions.
- one of the traveling directions is “front”, the other is “rear”, and one of the vehicle width directions May be referred to as “right” and the other as “left”.
- the dump truck 1 is an off-road dump truck that travels unattended by remote operation, and is configured, for example, as a vehicle that operates at a mining site in mine development. As will be described in detail later, the remote operation is performed by using information communication technology such as communication means provided in the management center and the dump truck 1 and GPS.
- the dump truck 1 includes a chassis 2 and a dump body 3, and loads the load such as earth and sand in the dump body 3 and travels in both the front and rear directions.
- the chassis 2 is supported by a pair of left and right tires 4 provided on both sides in the vehicle width direction on one side in the traveling direction, and a tire 5 provided on both sides in the vehicle width direction on the other side in the traveling direction.
- the chassis 2 includes a frame 6 extending in the traveling direction, and tires 4 and 5 are attached to the frame 6 via a suspension device.
- the frame 6 includes a pair of upper side members 6 ⁇ / b> A that extend in the traveling direction at both end portions of the chassis 2, and a pair of lower side members 6 ⁇ / b> B.
- the upper side member 6A and the lower side member 6B that are spaced apart from each other are connected by a plurality of vertical members 6C at the front end and the rear end.
- the pair of upper side members 6A arranged in the vehicle width direction are connected by a plurality of upper cross members extending in the vehicle width direction, and the pair of lower side members 6B are a plurality of lower cross members extending in the vehicle width direction. Connected by members. That is, the frame 6 has a rectangular parallelepiped frame when viewed from the traveling direction of the chassis 2.
- Such a frame 6 is provided with an engine 7, a radiator 8, a control device 9, an obstacle detection sensor (not shown), and a hoist cylinder 10.
- the dump truck 1 is a vehicle dedicated to remote operation, and there is no cab for driving operation provided in a conventional dump truck.
- the engine 7 is provided between the upper side member 6A and the lower side member 6B of the frame 6, and an upper portion projects from the upper side member 6A. Further, the engine 7 is provided on the rear side of the tire 4 and is disposed in a wheel base W defined by the rotation center of the tire 4 and the tire 5, and the center of gravity of the dump truck 1 is approximately the center of the chassis 2. It has become.
- a pair of radiators 8 is provided on both sides of the chassis 2 in the substantially central vehicle width direction, and cools the cooling water of the engine 7.
- the control device 9 controls the traveling of the dump truck 1, an obstacle detection sensor provided at the end of the chassis 2 on the soil removal side, a temperature sensor provided in the engine 7, a rotation sensor provided in the tires 4, 5, etc.
- the traveling control of the dump truck 1 is performed based on the sensor information.
- Two hoist cylinders 10 are provided at the rear of the control device 9 in the vehicle width direction, their bases are rotatably provided on the frame 6, and the tip is the end opposite to the soil discharge side end of the dump body 3. It is rotatably provided on the lower surface of the part.
- the hoist cylinder 10 operates by receiving hydraulic oil from a hydraulic pump provided in the frame 6, and the hydraulic pump is driven by the engine 7.
- the dump body 3 covers the entire length of the chassis 2 in the traveling direction and the entire width in the vehicle width direction in plan view. The part extends from the end of the chassis 2. As shown in FIG. 3, the dump body 3 is configured as a box-shaped body having a rectangular shape in plan view. In addition, since the dump body 3 is rectangular and the chassis 2 is also formed in the same rectangular shape in the front-rear direction, the front-rear direction is not distinguished. For this reason, it can advance in both directions (it demonstrates as front and back for convenience). Although not shown, the dump body 3 is placed on a body mount provided at the upper end of the vertical member 6C.
- the dump body 3 is mounted on the end of the frame 6 on the soil removal side in the traveling direction so as to be able to undulate (turnable) via a hinge 12.
- the dump body 3 undulates with the hinge 12 of the frame 6 as a rotation axis when the hoist cylinder 10 described above extends.
- the dump body 3 is configured by a box-shaped body having a rectangular shape in plan view, and includes a pair of side plate portions 13, a bottom surface portion 14, a first inclined surface portion 15, and a second inclined surface portion 16. And a front surface portion 17.
- the first inclined surface portion 15 rises upward from the rear portion of the bottom surface portion 14, and the second inclined surface portion 16 is inclined downward from the upper end of the first inclined surface portion 15.
- the front surface portion 17 rises upward from the front portion of the bottom surface portion 14.
- a protruding portion 18 is provided at the upper end of the front surface portion 17.
- the antenna units 20 are rotatably provided on both sides of the outer side surface at the rear end that is the soil discharge side surface of the pair of side plate portions 13 of the dump body 3.
- the antenna unit 20 forms an antenna mounting structure according to this embodiment, and includes an antenna installation portion 21 and a parallel link mechanism 22 as shown in FIG. 4A.
- the antenna installation portion 21 is attached to be rotatable about the rotation center O of the side plate portion 13 of the dump body 3, and includes an installation portion main body 23 and an extension portion 24.
- the parallel link mechanism 22 includes an extension part 24 of the antenna installation part 21, a hinge 12 serving as a rotation center of the dump body 3, a rotation center O to which the antenna installation part 21 is rotatably attached, and a link rod 25.
- the parallel link mechanism is formed by arranging the link rod 25 in parallel with the line of the side plate 13 connecting the hinge 12 and the rotation center O.
- the installation part main body 23 is comprised from the steel plate-shaped body extended in a horizontal direction.
- the installation unit main body 23 is provided with a plurality of antennas 23A to 23C.
- the antenna 23A is a GPS antenna, and is provided for receiving radio waves from satellite communication and grasping the position of the dump truck 1 itself.
- the antenna 23B is an antenna that acquires position information for control by GPS or outputs error information, operation information, position information, and the like of the dump truck 1 via satellite communication.
- the position information for control by GPS needs to grasp position information sequentially and accurately from the antenna 23A, and therefore grasps position information with higher accuracy than the antenna 23A. For this reason, it is necessary to always maintain the antenna 23B in the same posture in order to stabilize the sensitivity.
- the antenna 23 ⁇ / b> C is an antenna for wireless LAN communication, and receives an operation signal that is remotely operated by an operator from the outside, and outputs the operation signal to the control device 9.
- the control device 9 receives an operation signal from the operator and performs traveling control of the dump truck 1.
- the antennas 23A to 23C are provided on both side surfaces of the dump body 3 in the vehicle width direction, and the antennas 23A to 23C are slightly longer than the vehicle width of the dump truck 1. They are spaced apart by L.
- the installation portion main body 23 is such that the upper ends of the antennas 23A to 23C protrude from the upper end of the dump body 3 and the load on the side plate portion 13 of the dump body 3 is loaded. It is arrange
- the extending portion 24 is constituted by a truss-like member that combines a steel pipe extending from the lower surface of the installation portion main body 23 to the front side in the traveling direction of the dump truck 1.
- a lower end portion 24 ⁇ / b> A of the extending portion 24 is rotatably attached to the rotation center O of the side plate portion 13.
- the link rod 25 is provided at a position offset in the opposite direction from the soil discharge side end of the dump body 3.
- the link rod 25 is composed of a steel rod-like body, and one end is rotatably attached to a front end portion 24B that is offset by a predetermined dimension from the lower end portion 24A of the extending portion 24, and the other end is outside the vertical member 6C.
- a base 11 provided on the side surface is rotatably attached.
- the link rod 25 pulls the front end 24B of the extended portion 24 downward, the horizontal posture of the installation portion main body 23 is maintained, and the postures of the antennas 23A to 23C are always vertically upward. It is kept facing.
- the antenna unit 20 Since the antenna unit 20 is attached to the side plate portion 13 via the parallel link mechanism 22, the posture and height of the antenna installation portion 21 can be maintained even when the dump body 3 is rotated. It is possible to ensure the reception accuracy of the plurality of antennas 23A to 23C provided in the. Further, since the antenna unit 20 is installed in the vicinity of the end of the dump body 3 on the soil removal side, the height of the antennas 23A to 23C hardly changes even when the dump body 3 is raised for soil removal. Since the antenna unit 20 is attached to the dumping side surface of the dump body 3, the radius at which the parallel link mechanism 22 rotates along with the rotation of the dump body 3 can be reduced. Therefore, the parallel link mechanism 22 can be reduced. it can.
- the parallel link mechanism 22 can be formed simply by connecting the installation portion main body 23 and the extension portion 24 and the chassis 2 with the link rod 25, the mounting structure of the antenna installation portion 21 can be simplified. Since the antenna installation portion 21 includes the extension portion 24, the plurality of antennas 23A to 23C can be arranged at positions away from the soil discharge side end of the dump body 3, and project from the upper end of the dump body 3. Therefore, when the load loaded in the dump body 3 is discharged, it is possible to prevent the load from colliding with the plurality of antennas 23A to 23C and breaking. Further, by projecting the plurality of antennas 23A to 23C from the upper end of the dump body 3, it is possible to prevent the reception accuracy from being deteriorated due to the influence of the dump body 3.
- the present invention is not limited to the above-described embodiments, but includes modifications and improvements as long as the object of the present invention can be achieved.
- the antenna installation unit 21 is provided with the three types of antennas 23A to 23C.
- the present invention is not limited to this, and two types of antennas and four or more types of antennas may be installed.
- the link rod 25 was rotatably attached between the front-end part 24B of the extension part 24, and the earth discharge
- the extended part 24 was formed with the truss-shaped member, it is not restricted to this, You may form an extended part with a plate-shaped member.
- the specific structure, shape, and the like when implementing the present invention may be other structures as long as the object of the present invention can be achieved.
- SYMBOLS 1 ... Dump truck, 2 ... Chassis, 3 ... Dump body, 4 ... Tire, 5 ... Tire, 6 ... Frame, 6A ... Upper side member, 6B ... Lower side member, 6C ... Vertical member, 7 ... Engine, 8 ... Radiator DESCRIPTION OF SYMBOLS, 9 ... Control apparatus, 10 ... Hoist cylinder, 11 ... Base, 12 ... Hinge, 13 ... Side plate part, 14 ... Bottom part, 15 ... 1st inclined surface part, 16 ... 2nd inclined surface part, 17 ... Front part, 18 ... Projection part, 20 ... antenna unit, 21 ... antenna installation part, 22 ... parallel link mechanism, 23 ... installation part body, 23A ... antenna, 23B ... antenna, 23C ... antenna, 24 ... extension part, 24A ... lower end part, 24B ... Front end, 25 ... Link rod, L ... Dimensions, O ... Center of rotation, W ... Wheelbase.
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- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Radar, Positioning & Navigation (AREA)
- Transportation (AREA)
- Details Of Aerials (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Support Of Aerials (AREA)
Abstract
Description
特許文献1に開示された技術は、土砂等を積載するダンプボディの走行方向前端に、GPSアンテナを揺動可能に設け、排土時にダンプボディを起こした際、GPSアンテナを揺動させ、GPSアンテナが常に鉛直方向に維持し、受信精度が低下することを防止している。
前記特許文献2に開示された技術に特許文献1を適用する場合、ダンプボディの前端部に取り付けることが考えられる。
この発明によれば、平行リンク機構を備えていることにより、ダンプボディが回動しても、平行リンク機構がこれに応じて回転して、アンテナ設置部の姿勢を維持することができるため、アンテナ設置部に設けられた複数のアンテナの受信精度を確保することができる。
本発明では、アンテナの取付構造は、ダンプボディの側面の両側に設けられているのが好ましい。
[1]ダンプトラック1の全体説明
図1から図3には、本発明の実施形態に係るダンプトラック1が示されている。図1は、走行方向に直交する車幅方向から見た側面図、図2は、走行方向から見た側面図、図3は上視点から見た平面図である。
ダンプトラック1は、シャーシ2およびダンプボディ3を備え、ダンプボディ3内に土砂等の積載物を積載して前後双方向に走行し、図1における走行方向のX軸のマイナス方向を一方向として排土する。なお、前進走行とは、前後で区別がないため、双方向前進として同じ動きをすることができることをいう。
フレーム6は、シャーシ2の両側端部に走行方向に延出する一対のアッパーサイドメンバ6Aと、一対のロアーサイドメンバ6Bとを備える。上下に離間して配置されるアッパーサイドメンバ6Aおよびロアーサイドメンバ6Bは、先端および後端で複数のバーチカルメンバ6Cによって連結されている。また、車幅方向に配置される一対のアッパーサイドメンバ6A同士は、車幅方向に延びる複数のアッパークロスメンバによって連結され、一対のロアーサイドメンバ6B同士は、車幅方向に延びる複数のロアークロスメンバによって連結されている。すなわちフレーム6は、シャーシ2の走行方向から見て直方体状の骨組を有している。
エンジン7は、フレーム6のアッパーサイドメンバ6Aおよびロアーサイドメンバ6Bの間に設けられ、上部がアッパーサイドメンバ6Aから突出している。
また、エンジン7は、タイヤ4の後方側に設けられ、タイヤ4およびタイヤ5の回転中心で規定されるホイールベースW内に配置されており、ダンプトラック1の重心が、シャーシ2の略中央となっている。
制御装置9は、ダンプトラック1の走行を制御し、シャーシ2の排土側端部に設けられる障害物検出センサや、エンジン7に設けられる温度センサ、タイヤ4、5に設けられた回転センサ等のセンサ情報に基づいて、ダンプトラック1の走行制御を行う。
ホイストシリンダ10は、制御装置9の後方に、車幅方向に2つ設けられ、その基部はフレーム6に回転可能に設けられ、先端はダンプボディ3の排土側端部とは反対側の端部下面に回転可能に設けられている。
ホイストシリンダ10は、図示を略したが、フレーム6内に設けられた油圧ポンプから作動油を受けて動作し、油圧ポンプは、エンジン7によって駆動される。
ダンプボディ3は、図3に示されるように、平面視でシャーシ2の走行方向の全長および車幅方向の全幅を覆っており、ダンプボディ3の排土側端部は、シャーシ2の端部から延出している。ダンプボディ3は、図3に示されるように、平面視矩形状の箱状体として構成されている。なお、ダンプボディ3が矩形状で、シャーシ2も前後方向に同じ矩形状に作られているため、前後方向には区別されていない。このため、双方向に前進できる(便宜上前後として説明する。)。また、ダンプボディ3は、図示を略したが、バーチカルメンバ6Cの上端に設けられたボディマウント上に載置される。
ダンプボディ3は、フレーム6の排土側の走行方向の端部にヒンジ12を介して起伏可能(回動可能)に装着されている。ダンプボディ3は、前述したホイストシリンダ10が伸長することにより、フレーム6のヒンジ12を回転軸として起伏する。
このようなダンプボディ3の一対の側板部13の排土側側面となる後端における外側面の両側には、アンテナユニット20が回転可能に設けられている。
アンテナユニット20は、本実施形態に係るアンテナの取付構造を形成し、図4Aに示されるように、アンテナ設置部21と、平行リンク機構22とを備える。アンテナ設置部21は、ダンプボディ3の側板部13の回転中心Oを中心として回転可能に取り付けられ、設置部本体23、および延設部24を備える。
平行リンク機構22は、アンテナ設置部21の延設部24と、ダンプボディ3の回動中心となるヒンジ12とアンテナ設置部21が回転可能に取り付けられる回転中心Oと、リンクロッド25とを含んで形成され、ヒンジ12および回転中心Oを結ぶ側板部13の線に対して、リンクロッド25が平行に配置されることで平行リンク機構が形成される。
アンテナ23Aは、GPSアンテナであり、衛星通信からの電波を受信して、ダンプトラック1自身の位置を把握するために設けられている。
アンテナ23Bは、GPSによる制御用位置情報を取得したり、衛星通信を介して、ダンプトラック1のエラー情報、稼働情報、位置情報等を出力するアンテナである。GPSによる制御用位置情報は、アンテナ23Aよりも逐次的にかつ正確に位置情報を把握する必要があるため、アンテナ23Aよりも高精度の位置情報を把握する。このため、アンテナ23Bは感度を安定させるために、常に同じ姿勢に維持する必要がある。
アンテナ23Cは、無線LAN通信用のアンテナであり、オペレータが外部から遠隔操作を行った操作信号を受信して、制御装置9に出力する。制御装置9は、オペレータからの操作信号を受信して、ダンプトラック1の走行制御を行う。
設置部本体23には、図4Aに示されるようにアンテナ23A~23Cの上端が、ダンプボディ3の上端よりも突出するように、かつダンプボディ3の側板部13の積載物が積載される部分から離れた位置に配置され、鋼製の側板部13が各種無線電波の送受信の障害とならないようになっている。
リンクロッド25は、ダンプボディ3の排土側端部から反対方向にオフセットした位置に設けられている。リンクロッド25は、鋼製の棒状体から構成され、一端が、延設部24の下端部24Aから所定寸法オフセットされた前端部24Bに回転可能に取り付けられ、他端が、バーチカルメンバ6Cの外側面に設けられた台座11に回転可能に取り付けられている。
ダンプボディ3が排土のため起こされると、リンクロッド25が延設部24の前端部24Bを下方に引っ張り、設置部本体23の水平姿勢が維持され、アンテナ23A~23Cの姿勢は常に鉛直上方を向いたままとされる。
このような本発明によれば、以下のような効果がある。
アンテナユニット20が、平行リンク機構22を介して側板部13に取り付けられることにより、ダンプボディ3が回動してもアンテナ設置部21の姿勢と高さを維持することができるため、アンテナユニット20に設けられた複数のアンテナ23A~23Cの受信精度を確保することができる。
また、アンテナユニット20が、ダンプボディ3の排土側端部近傍に設置されているため、排土のためにダンプボディ3が起こされてもアンテナ23A~23Cの高さがほとんど変わらない。
アンテナユニット20がダンプボディ3の排土側側面に取り付けられることにより、ダンプボディ3の回動とともに平行リンク機構22が回転する半径を小さくすることができるため、平行リンク機構22を小さくすることができる。
アンテナ設置部21が延設部24を備えていることにより、複数のアンテナ23A~23Cをダンプボディ3の排土側端部から離れた位置に配置することができ、ダンプボディ3の上端から突出させることができるので、ダンプボディ3内に積載された積載物を排土する際に、複数のアンテナ23A~23Cに積載物が衝突して、壊れることを防止することができる。また、ダンプボディ3の上端から複数のアンテナ23A~23Cを突出させることにより、ダンプボディ3の影響を受けて受信精度が低下することを防止することができる。
なお、本発明は前述の実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれるものである。
例えば、前記実施形態では、アンテナ設置部21には、3種類のアンテナ23A~23Cが設けられていたが、これに限らず、2種類のアンテナ、4種類以上のアンテナを設置してもよい。
前記実施形態では、リンクロッド25は、延設部24の前端部24Bと、シャーシ2の排土側端部との間に回転可能に取り付けられていたが、これに限らず、シャーシ2とダンプボディ3との間で、平行リンクを形成できるのであれば、任意の位置に取り付けてもよい。
その他、本発明の実施の際の具体的な構造および形状等は、本発明の目的を達成できる範囲で他の構造等としてもよい。
Claims (6)
- シャーシと、シャーシに回動可能に設けられるダンプボディとを備え、平面視で前記ダンプボディが全長および全幅にわたって前記シャーシを覆うダンプトラックに、複数のアンテナを取り付けるアンテナの取付構造であって、
前記複数のアンテナが設けられ、前記ダンプボディの側面に回転可能に取り付けられるアンテナ設置部と、
前記アンテナ設置部、および前記ダンプボディの回動中心を含んで形成され、前記ダンプボディの回動時、前記アンテナ設置部の姿勢を維持する平行リンク機構とを備えていることを特徴とするアンテナの取付構造。 - 請求項1に記載のアンテナの取付構造において、
前記アンテナ設置部が、前記ダンプボディの排土側側面に取り付けられていることを特徴とするアンテナの取付構造。 - 請求項1または請求項2に記載のアンテナの取付構造において、
前記リンク機構は、一端が前記アンテナ設置部に回転可能に取り付けられ、前記ダンプボディの回動中心から、前記ダンプボディの排土側端部とは反対方向にオフセットした位置で、他端が前記シャーシに回転可能に取り付けられるリンクロッドを備えていることを特徴とするアンテナの取付構造。 - 請求項1から請求項3のいずれか一項に記載のアンテナの取付構造を備えたことを特徴とするダンプトラック。
- 請求項4に記載のダンプトラックにおいて、
前記アンテナの取付構造は、前記ダンプボディの側面の両側に設けられていることを特徴とするダンプトラック。 - 請求項4または請求項5に記載のダンプトラックにおいて、
前記アンテナ設置部は、前記複数のアンテナが設置される設置部本体と、前記設置部本体から下方に延びる延設部とを備え、
前記複数のアンテナが、前記ダンプボディの排土側端部から離れた位置に配置され、かつ前記ダンプボディの上端から突出していることを特徴とするダンプトラック。
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