WO2011033771A1 - Opening/closing device for vehicle tailgate - Google Patents

Opening/closing device for vehicle tailgate Download PDF

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Publication number
WO2011033771A1
WO2011033771A1 PCT/JP2010/005641 JP2010005641W WO2011033771A1 WO 2011033771 A1 WO2011033771 A1 WO 2011033771A1 JP 2010005641 W JP2010005641 W JP 2010005641W WO 2011033771 A1 WO2011033771 A1 WO 2011033771A1
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WIPO (PCT)
Prior art keywords
closing device
hook
vehicle
gate
opening
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PCT/JP2010/005641
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French (fr)
Japanese (ja)
Inventor
沢部秀明
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新明和工業株式会社
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Publication of WO2011033771A1 publication Critical patent/WO2011033771A1/en

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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
    • B60P1/26—Means for controlling movement of tailboards or sideboards
    • B60P1/273—Providing interdependence between tipping movement and the latching or unlatching of a freely-swingable tailboard or sideboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D33/00—Superstructures for load-carrying vehicles
    • B62D33/02—Platforms; Open load compartments
    • B62D33/023—Sideboard or tailgate structures
    • B62D33/027—Sideboard or tailgate structures movable
    • B62D33/037—Latching means therefor

Definitions

  • the present invention relates to an improvement of a gate opening / closing device for opening / closing a gate of a vehicle such as a dump truck.
  • a tailgate opening and closing device for a dump truck bed has been known.
  • a loading platform is supported on a chassis so that the loading platform can be dumped, and a latch having a hook portion that engages with a latch of a tailgate of the loading platform is provided on the platform so as to be rotatable.
  • a latch having a hook portion that engages with a latch of a tailgate of the loading platform is provided on the platform so as to be rotatable.
  • the present invention has been made in view of such a point, and an object of the present invention is to make a gate opening / closing device of a vehicle highly reliable with a simple configuration and without foreign matter biting.
  • the shape of the lower engaging portion of the hook is devised to prevent foreign matter from being caught.
  • a gate that pivots downward from above about a pivot shaft provided on the loading platform and opens downward;
  • a locking portion provided at the lower end of the gate;
  • the present invention is intended for a gate opening / closing device of a vehicle, which is provided with a hook that rotates in accordance with the tilting operation of the loading platform and engages the locking portion from below.
  • the hook is A flat side engaging part that contacts the locking part from the side; It has a lower engaging portion that abuts on the locking portion from below and whose cross section gradually decreases toward the locking portion.
  • the side engaging portion of the hook is in contact with the engaging portion from the side on a flat surface, so that the force to open the gate is effectively suppressed and the gate is surely opened. To be prevented.
  • the force to open the gate is hardly applied to the lower engaging portion of the hook, so that the lower engaging portion and the locking portion do not need to contact in a wide range. For this reason, even if the cross section of the lower engaging portion gradually decreases toward the locking portion, the action of stopping the hook gate from opening is not weakened.
  • the cross section of the lower engaging portion gradually decreases toward the locking portion, so that foreign matter is not easily accumulated. For this reason, it is effectively prevented that foreign matter is caught between the hook and the locking portion.
  • the lower engaging portion has a mountain-shaped inclined surface.
  • the lower engaging portion becomes narrower toward the tip, when the load on the loading platform is discharged, the load is distributed along the angled surface of the mountain and falls downward, and the hook is engaged downwardly. It does not accumulate on the part.
  • the lower engaging portion has an outer peripheral surface with a circular arc cross section.
  • the gate is a tailgate provided behind the dump truck.
  • the flat side engaging portion of the hook is brought into contact with the engaging portion from the side, and the lower engaging portion gradually decreases in section toward the engaging portion.
  • FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7.
  • the dump truck 2 includes a driver's cab 3 in the front, and a chassis 4 is provided behind the driver's cab 3. ing.
  • a loading platform 5 capable of dumping (tilting) is mounted on the chassis 4.
  • the loading platform 5 includes a rectangular floor plate 6, and a protector 7 is erected on the front end of the vehicle body of the floor plate 6.
  • a pair of side gates 8 are erected on both ends of the loading platform 5 in the vehicle width direction.
  • a tailgate 9 is erected at the rear end of the vehicle body of the floor plate 6 so as to be opened downward.
  • the protector 7, the side gate 8, and the tail gate 9 surround the entire outer periphery of the floor plate 6, thereby forming the loading platform 5.
  • the chassis 4 is provided with a tilting cylinder (not shown), and by extending and contracting the tilting cylinder, the loading platform 5 is undulated (dumped) around the undulating shaft 5a.
  • the tailgate 9 is configured to be pivoted downward from the bottom (counterclockwise in FIG. 1) about the pivot shafts 10 provided on the left and right of the rear end of the cargo bed 5 so as to open downward.
  • a pair of pin mounting brackets 9a are provided at the lower end portion of the tailgate 9 at a predetermined interval on the left and right sides, and the locking pins 12 (extending to the left and right) are provided as locking portions having a circular cross section on each pin mounting bracket 9a. Is provided.
  • a hook 13 that rotates in accordance with the tilting operation of the loading platform 5 is provided at the rear end of the loading platform 5.
  • the hook 13 engages with the locking pin 12 from below to restrict the tailgate 9 from opening. That is, the hook 13 is connected to one end of an interlocking bar 15 that is interlocked with the raising / lowering operation of the loading platform 5, and the other end of the interlocking bar 15 is connected to the lower support bracket 16 of the chassis 4.
  • the hook 13 is supported so that its proximal end is pivotable about the hook pivot shaft 18 of the upper support bracket 17 provided on the floor plate 6 of the loading platform 5, and on the distal end side.
  • a collar portion 13a is formed.
  • a hook bracket 13b projects from an intermediate portion on the opposite side (lower side) of the flange portion 13a, and is connected to the interlocking rod 15 so as to be relatively rotatable by a connecting pin 19 provided on the hook bracket 13b. .
  • an interlocking rod support pin 20 on which the other end of the interlocking rod 15 is rotatably supported is supported by the lower support bracket 16.
  • the interlocking rod support pin 20 is inserted into the long hole 15a at the other end of the interlocking rod 15, so that the interlocking rod 15 is slidable in the axial direction by the amount of play by the long hole 15a.
  • a flat side engaging portion 22 that contacts the locking pin 12 from the side (rear side of the vehicle) is formed on the inner side surface of the flange portion 13 a of the hook 13.
  • the term “flat” does not mean a completely flat thing, but may have some unevenness and some curvature.
  • a lower engaging portion 23 that is in contact with the locking pin 12 from below is vertically continuous with the side engaging portion 22.
  • the cross section of the lower engaging portion 23 is tapered so as to gradually become smaller toward the locking pin 12.
  • the lower engaging portion 23 is made of angle steel and has two inclined surfaces 23a.
  • the taper surface 13c is formed in the front-end
  • tension coil spring 24 One end of the tension coil spring 24 is connected to the tailgate 9 side of the interlocking rod 15 and the other end is connected to the rear end of the loading platform 5.
  • the interlocking rod 15 is always pulled toward the tailgate 9 side, the interlocking rod support pin 20 is positioned at the end of the long hole 15a, and the hook 13 is urged upward so that the tailgate 9 is intended. It doesn't open.
  • the triangle formed by the interlocking rod support pin 20, the connecting pin 19, and the hook rotation shaft 18 is deformed along with the raising / lowering operation of the loading platform 5, so that the hook 13 is synchronized with the raising / lowering operation.
  • the tension coil spring 24 is rotated while being pulled.
  • the interlocking rod 15 is pulled toward the tailgate 9 by the tension coil spring 24, and the hook 13 is biased upward. This prevents the tailgate 9 from opening unintentionally when traveling.
  • the side engaging portion 22 of the hook 13 contacts the locking pin 12 from the side (rear side of the vehicle), the gate is reliably prevented from opening.
  • the force for opening the gate is hardly applied to the lower engaging portion 23 of the hook 13, the lower engaging portion 23 and the locking pin 12 do not need to contact in a wide range. For this reason, the tip of the lower engagement portion 23 is pointed and is in a state of almost line contact with the locking pin 12 (on a straight line extending from side to side), but the gate of the hook 13 is about to open. The stopping effect is hardly weakened.
  • the tilting cylinder of the chassis 4 is extended to raise the loading platform 5. Then, as shown in FIG. 4, as the loading platform 5 is raised, the triangular shape formed by the interlocking rod support pin 20, the connecting pin 19, and the hook rotation shaft 18 is deformed, and the hook rotation shaft is formed. With the center 18, the hook 13 a of the hook 13 rotates downward with respect to the loading platform 5.
  • the discharged earth and sand may flow onto the lower engaging portion 23.
  • the earth and sand are distributed while being guided by the inclined surface 23a and smoothly flow downward, the earth and sand accumulate on the lower engaging portion 23. None do.
  • the tilting cylinder is reduced and the loading platform 5 is lowered.
  • the tailgate 9 closes again by its own weight (clockwise in FIG. 1), and the locking pin 12 comes into contact with the tapered surface 13c of the flange 13a to push down the hook 13 and rotate downward.
  • the locking pin 12 comes into contact with the side engaging portion 22 of the hook 13 that is biased by the tension coil spring 24.
  • the hook 13 is smoothly engaged with the locking pin 12.
  • the flat side engaging portion 22 of the hook 13 makes contact with the locking pin 12 from the side, and the cross section gradually approaches the locking pin 12. Since the lower engaging portion 23 is made to contact the locking pin 12 from below, the tailgate 9 can be opened with a simple configuration without providing a separate manual lock release device. It is possible to make the gate opening / closing device 1 of the vehicle highly reliable by preventing the foreign matter from being caught during discharge while maintaining the effect of preventing it.
  • the present invention may be configured as follows with respect to the above embodiment.
  • the lower engaging portion 23 is formed by welding angle steel, but may be integrally formed with the hook 13.
  • the lower engaging part 23 shall have the mountain-shaped inclined surface 23a, it has the at least 1 inclined surface 23a from which a cross section becomes gradually small toward the locking pin 12.
  • FIG. Any shape may be used, and the tip may be rounded, or the outer peripheral surface may be a circular arc.
  • the outer peripheral surface has a circular arc cross section, if the shape of the lower engaging portion 23 is rounded, foreign matter is less likely to accumulate as compared to a flat shape. It is effectively prevented to bite between the two.
  • the locking pin 12 having a circular cross section has been described as an example of the locking portion.
  • the cross section may be polygonal, and may be an integral part of the tailgate 9. Any shape that can be engaged is acceptable.
  • the opening / closing device for the tailgate 9 has been described as an example.
  • the opening / closing device for the side gate 8 may be applied as long as the loading platform is raised and lowered in the vehicle width direction.
  • the present invention is useful for a gate opening and closing device that opens and closes a gate of a vehicle such as a dump truck.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lock And Its Accessories (AREA)

Abstract

Disclosed is an opening/closing device for a vehicle tailgate which does not trap foreign objects therein, has a simple structure and is highly reliable. A tailgate (9) is provided so as to be rotated upwards around a rotatable shaft provided in a truck-bed (5) thus opening from below. A locking pin (12) is provided on the lower edge section of the tailgate (9). A hook (13), rotated in accordance with the tilting motion of the truck-bed (5), engages onto the locking pin from below. At that time, a flat sideways engaging section (22) of the hook (13) is brought into contact with the locking pin (12), from the side, and a downwards engaging section (23), the cross-section of which gradually becomes smaller in the direction of the locking pin (12), is brought into contact with the locking pin (12), from below.

Description

車両のゲート開閉装置Vehicle gate opening and closing device
　本発明は、ダンプカーなどの車両のゲートを開閉させるゲート開閉装置の改良に関するものである。 The present invention relates to an improvement of a gate opening / closing device for opening / closing a gate of a vehicle such as a dump truck.
　従来より、ダンプトラックの荷台のテールゲートの開閉装置は知られている。例えば、特許文献１の締結装置では、車台に軸で荷台をダンプ可能に支持し、荷台のテールゲートの止金に係合する鉤部を有する掛金を荷台に回動自在に設け、この掛金を荷台のダンプ動作に合わせて回動させることにより、閉じられていたテールゲートの締結を自動的に解除するように構成されている。 Conventionally, a tailgate opening and closing device for a dump truck bed has been known. For example, in the fastening device of Patent Document 1, a loading platform is supported on a chassis so that the loading platform can be dumped, and a latch having a hook portion that engages with a latch of a tailgate of the loading platform is provided on the platform so as to be rotatable. By rotating in accordance with the dumping operation of the loading platform, the fastening of the closed tailgate is automatically released.
特開昭５７－３７０７３号公報JP 57-37073 A
　しかしながら、従来の車両のゲート開閉装置では、テールゲートを開いて荷台内の土砂等を排出する際に、鉤部の上面に異物が堆積し、ダンプ後に荷台を水平に戻すときに、異物が鉤部と止金との間に噛み込んで開閉がスムーズに行えないという問題があった。 However, in a conventional vehicle gate opening and closing device, when the tailgate is opened and the earth and sand in the loading platform is discharged, foreign matter accumulates on the upper surface of the heel, and when the loading platform is returned to the horizontal after dumping, There is a problem that it cannot be smoothly opened and closed by biting between the part and the clasp.
　しかも、一度噛み込んでしまうと、もう一度ダンプして掛金を回動させない限り、異物を取り除くことはできず、再びダンプすれば異物がさらに堆積する可能性があった。 Moreover, once the bite is caught, the foreign matter cannot be removed unless it is dumped again and the latch is rotated, and if it is dumped again, the foreign matter may further accumulate.
　逆に、ダンプせずにフックのロックを解除できるようにするには、例えば、手動式のロック解除機構をさらに設けなければならず、構成が複雑となるという問題がある。 Conversely, in order to be able to unlock the hook without dumping, for example, a manual lock release mechanism must be further provided, and there is a problem that the configuration becomes complicated.
　本発明は、かかる点に鑑みてなされたものであり、その目的とするところは、車両のゲート開閉装置を、簡単な構成で異物の噛み込みのない信頼性の高いものとすることにある。 The present invention has been made in view of such a point, and an object of the present invention is to make a gate opening / closing device of a vehicle highly reliable with a simple configuration and without foreign matter biting.
　上記の目的を達成するために、この発明では、フックの下方係合部の形状に工夫を加えることにより、異物の噛み込みを防止するようにした。 In order to achieve the above object, in the present invention, the shape of the lower engaging portion of the hook is devised to prevent foreign matter from being caught.
　具体的には、第１の発明では、
　荷台に設けた回動軸を中心に下方から上方へ回動されて下開きするゲートと、
　上記ゲートの下端部に設けられた係止部と、
　上記荷台の傾動動作に合わせて回動し、上記係止部に下方から係合するフックとを備えた、車両のゲート開閉装置を対象とする。 Specifically, in the first invention,
A gate that pivots downward from above about a pivot shaft provided on the loading platform and opens downward;
A locking portion provided at the lower end of the gate;
The present invention is intended for a gate opening / closing device of a vehicle, which is provided with a hook that rotates in accordance with the tilting operation of the loading platform and engages the locking portion from below.
　そして、上記フックは、
　　上記係止部に側方から接触する平坦な側方係合部と、
　　上記係止部に下方から当接し、断面が係止部に向かって徐々に小さくなる下方係合部とを有している。 And the hook is
A flat side engaging part that contacts the locking part from the side;
It has a lower engaging portion that abuts on the locking portion from below and whose cross section gradually decreases toward the locking portion.
　上記の構成によると、フックの側方係合部は、平坦な面にて係止部に側方から接触するので、ゲートが開こうとする力を効果的に押さえ込み、ゲートが開くのが確実に防止される。一方、ゲートが開こうとする力は、フックの下方係合部にはほとんどかからないので、下方係合部と係止部とは、広範囲で接触する必要はない。このため、下方係合部の断面が係止部に向かって徐々に小さくなっても、フックのゲートが開こうとするのを止める作用は弱くなることはない。一方、荷台をダンプしてゲートが開いて荷台上の積載物が流れ込んできても、下方係合部の断面が係止部に向かって徐々に小さくなっているので、異物が堆積しにくい。このため、異物がフックと係止部との間に噛み込むのが効果的に防止される。 According to the above configuration, the side engaging portion of the hook is in contact with the engaging portion from the side on a flat surface, so that the force to open the gate is effectively suppressed and the gate is surely opened. To be prevented. On the other hand, the force to open the gate is hardly applied to the lower engaging portion of the hook, so that the lower engaging portion and the locking portion do not need to contact in a wide range. For this reason, even if the cross section of the lower engaging portion gradually decreases toward the locking portion, the action of stopping the hook gate from opening is not weakened. On the other hand, even if the loading platform is dumped and the gate is opened and the load on the loading platform flows in, the cross section of the lower engaging portion gradually decreases toward the locking portion, so that foreign matter is not easily accumulated. For this reason, it is effectively prevented that foreign matter is caught between the hook and the locking portion.
　第２の発明では、第１の発明において、
　下方係合部は、山形の傾斜面を有するものである。 In the second invention, in the first invention,
The lower engaging portion has a mountain-shaped inclined surface.
　上記の構成によると、下方係合部が先端に向かって細くなるので、荷台の積載物を排出する際に積載物が山形の傾斜面に沿って振り分けられて下方へ落ち、フックの下方係合部に堆積することはない。 According to the above configuration, since the lower engaging portion becomes narrower toward the tip, when the load on the loading platform is discharged, the load is distributed along the angled surface of the mountain and falls downward, and the hook is engaged downwardly. It does not accumulate on the part.
　第３の発明では、第１の発明において、
　下方係合部は、外周面が断面円弧状のものとする。 In the third invention, in the first invention,
The lower engaging portion has an outer peripheral surface with a circular arc cross section.
　上記の構成によると、下方係合部の形状が丸みを帯びたものであれば、平坦なものに比べて異物が堆積しにくくなるので、異物がフックと係止部との間に噛み込むのが防止される。 According to the above configuration, if the shape of the lower engaging portion is rounded, foreign matter is less likely to accumulate compared to a flat one, so that the foreign matter is caught between the hook and the locking portion. Is prevented.
　第４の発明では、第１乃至第３のいずれか１つの発明において、
　上記ゲートは、ダンプカーの後方に設けられたテールゲートである。 In a fourth invention, in any one of the first to third inventions,
The gate is a tailgate provided behind the dump truck.
　上記の構成によると、土砂などの噛み込み安い積載物を積むダンプカーにおいて、フックと係止部との間に異物が噛み込むのが効果的に防止される。 上 記 According to the above configuration, in a dump truck that loads a low load such as earth and sand, foreign matter is effectively prevented from being caught between the hook and the locking portion.
　以上説明したように、本発明によれば、フックの平坦な側方係合部で係止部に側方から接触させると共に、断面が係止部に向かって徐々に小さくなる下方係合部で係止部に下方から当接させるようにしたことにより、ゲートが開くのを防ぐ効果を保ちながら、排出時の異物の噛み込みを防いで車両のゲートの開閉をスムーズに行うことができる。 As described above, according to the present invention, the flat side engaging portion of the hook is brought into contact with the engaging portion from the side, and the lower engaging portion gradually decreases in section toward the engaging portion. By making it come into contact with the locking portion from below, it is possible to smoothly open and close the gate of the vehicle while keeping the effect of preventing the gate from opening and preventing biting of foreign matters during discharge.
車両のゲート開閉装置を備えたダンプカーを示す側面図である。It is a side view which shows the dump truck provided with the gate opening / closing apparatus of the vehicle. ダンプカーを示す背面図である。It is a rear view which shows a dump truck. 車両のゲート開閉装置を閉じたときの様子を一部破断して示す側面図である。It is a side view which shows a mode that a state when the gate opening / closing apparatus of a vehicle is closed is partly broken. 車両のゲート開閉装置を開いたときの様子を一部破断して示す側面図である。It is a side view which shows a mode that a state when the gate opening / closing device of a vehicle is opened is partially broken. フック、係止ピン及びその周辺を拡大して示す側方断面図である。It is side sectional drawing which expands and shows a hook, a locking pin, and its periphery. フック、係止ピン及びその周辺を拡大して示す背面図である。It is a rear view which expands and shows a hook, a locking pin, and its periphery. フックの拡大側面図である。It is an enlarged side view of a hook. 図７のVIII－VIII線断面図である。FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7.
　以下、本発明の実施形態を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
　図１及び図２は本発明の実施形態の車両のゲート開閉装置１を備えたダンプカー２を示し、このダンプカー２は、前方に運転室３を備え、運転室３の後方に車台４が設けられている。この車台４には、ダンプ（傾動）操作可能な荷台５が搭載されている。 1 and 2 show a dump truck 2 having a vehicle gate opening / closing device 1 according to an embodiment of the present invention. The dump truck 2 includes a driver's cab 3 in the front, and a chassis 4 is provided behind the driver's cab 3. ing. A loading platform 5 capable of dumping (tilting) is mounted on the chassis 4.
　荷台５は、矩形状の床板６を備え、この床板６の車体前端には、プロテクタ７が立設されている。荷台５の車幅方向両端には、一対のサイドゲート８が立設されている。床板６の車体後端には、テールゲート９が下開き可能に立設されている。これらプロテクタ７、サイドゲート８及びテールゲート９により、床板６の外周全体が取り囲まれ、このことで、荷台５が形成されている。また、車台４には、図示しない傾動シリンダが設けられ、この傾動シリンダを伸縮させることにより、荷台５が起伏軸５ａを中心に起伏（ダンプ）されるようになっている。 The loading platform 5 includes a rectangular floor plate 6, and a protector 7 is erected on the front end of the vehicle body of the floor plate 6. A pair of side gates 8 are erected on both ends of the loading platform 5 in the vehicle width direction. A tailgate 9 is erected at the rear end of the vehicle body of the floor plate 6 so as to be opened downward. The protector 7, the side gate 8, and the tail gate 9 surround the entire outer periphery of the floor plate 6, thereby forming the loading platform 5. Further, the chassis 4 is provided with a tilting cylinder (not shown), and by extending and contracting the tilting cylinder, the loading platform 5 is undulated (dumped) around the undulating shaft 5a.
　テールゲート９は、荷台５の後端左右にそれぞれ設けた回動軸１０を中心に下方から上方へ（図１で反時計回りに）回動されて下開きするように構成されている。テールゲート９の下端部には、左右に所定の間隔を空けて一対のピン取付ブラケット９ａが設けられ、各ピン取付ブラケット９ａにそれぞれ断面円形の係止部として（左右に伸びる）係止ピン１２が設けられている。 The tailgate 9 is configured to be pivoted downward from the bottom (counterclockwise in FIG. 1) about the pivot shafts 10 provided on the left and right of the rear end of the cargo bed 5 so as to open downward. A pair of pin mounting brackets 9a are provided at the lower end portion of the tailgate 9 at a predetermined interval on the left and right sides, and the locking pins 12 (extending to the left and right) are provided as locking portions having a circular cross section on each pin mounting bracket 9a. Is provided.
　そして、図３及び図４に示すように、荷台５の後端には、荷台５の傾動動作に合わせて回動するフック１３が設けられている。このフック１３は、係止ピン１２に下方から係合して、テールゲート９が開くのを規制するようになっている。つまり、このフック１３は、荷台５の起伏操作に連動する連動棒１５の一端に連結され、この連動棒１５の他端が車台４の下側支持ブラケット１６に連結されている。図５～図８にも示すように、フック１３は、その基端側が荷台５の床板６に設けた上側支持ブラケット１７のフック回動軸１８を中心に回動可能に支持され、先端側に鉤部１３ａが形成されている。鉤部１３ａの反対側（下方側）の中間部には、フックブラケット１３ｂが突設され、そのフックブラケット１３ｂに設けた連結ピン１９により、連動棒１５と相対的に回転可能に連結されている。車台４側では、連動棒１５の他端が回動可能に支持される連動棒支持ピン２０が下側支持ブラケット１６において支持されている。この連動棒１５の他端の長孔１５ａに連動棒支持ピン２０が挿入されており、そのことで、連動棒１５は、長孔１５ａによる遊び分だけ軸方向にスライド可能となっている。 As shown in FIGS. 3 and 4, a hook 13 that rotates in accordance with the tilting operation of the loading platform 5 is provided at the rear end of the loading platform 5. The hook 13 engages with the locking pin 12 from below to restrict the tailgate 9 from opening. That is, the hook 13 is connected to one end of an interlocking bar 15 that is interlocked with the raising / lowering operation of the loading platform 5, and the other end of the interlocking bar 15 is connected to the lower support bracket 16 of the chassis 4. As shown in FIGS. 5 to 8, the hook 13 is supported so that its proximal end is pivotable about the hook pivot shaft 18 of the upper support bracket 17 provided on the floor plate 6 of the loading platform 5, and on the distal end side. A collar portion 13a is formed. A hook bracket 13b projects from an intermediate portion on the opposite side (lower side) of the flange portion 13a, and is connected to the interlocking rod 15 so as to be relatively rotatable by a connecting pin 19 provided on the hook bracket 13b. . On the chassis 4 side, an interlocking rod support pin 20 on which the other end of the interlocking rod 15 is rotatably supported is supported by the lower support bracket 16. The interlocking rod support pin 20 is inserted into the long hole 15a at the other end of the interlocking rod 15, so that the interlocking rod 15 is slidable in the axial direction by the amount of play by the long hole 15a.
　図７に拡大して示すように、フック１３の鉤部１３ａの内側面には、係止ピン１２に側方（車両後方）から接触する平坦な側方係合部２２が形成されている。なお、ここでいう平坦とは、完全に平坦なものを意味するのではなく、若干の凹凸や多少の湾曲があってもよいものとする。この側方係合部２２には、係止ピン１２に下方から当接する下方係合部２３が垂直に連続している。図８に示すように、下方係合部２３の断面は、係止ピン１２に向かって徐々に小さくなるように先細となっている。本実施形態では、下方係合部２３は、山形鋼よりなり、２つの傾斜面２３ａを有している。なお、鉤部１３ａの先端外側には、テーパ面１３ｃが形成されて先細となっている。 As shown in an enlarged view in FIG. 7, a flat side engaging portion 22 that contacts the locking pin 12 from the side (rear side of the vehicle) is formed on the inner side surface of the flange portion 13 a of the hook 13. Here, the term “flat” does not mean a completely flat thing, but may have some unevenness and some curvature. A lower engaging portion 23 that is in contact with the locking pin 12 from below is vertically continuous with the side engaging portion 22. As shown in FIG. 8, the cross section of the lower engaging portion 23 is tapered so as to gradually become smaller toward the locking pin 12. In the present embodiment, the lower engaging portion 23 is made of angle steel and has two inclined surfaces 23a. In addition, the taper surface 13c is formed in the front-end | tip outer side of the collar part 13a, and is tapered.
　連動棒１５のテールゲート９側には、引っ張りコイルバネ２４の一端が連結され、他端が荷台５の後端に連結されている。この引っ張りコイルバネ２４により、連動棒１５がテールゲート９側に常に引っ張られて連動棒支持ピン２０が長孔１５ａの端部に位置し、フック１３が上向きに付勢されてテールゲート９が意図せず開かないようになっている。 One end of the tension coil spring 24 is connected to the tailgate 9 side of the interlocking rod 15 and the other end is connected to the rear end of the loading platform 5. By this tension coil spring 24, the interlocking rod 15 is always pulled toward the tailgate 9 side, the interlocking rod support pin 20 is positioned at the end of the long hole 15a, and the hook 13 is urged upward so that the tailgate 9 is intended. It doesn't open.
　そして、連動棒支持ピン２０と、連結ピン１９と、フック回動軸１８とでつくられる三角形が、荷台５の起伏動作に伴って変形することにより、フック１３が起伏動作に合わせて連動棒１５に引き寄せられ、引っ張りコイルバネ２４を引っ張りながら、回動するようになっている。 The triangle formed by the interlocking rod support pin 20, the connecting pin 19, and the hook rotation shaft 18 is deformed along with the raising / lowering operation of the loading platform 5, so that the hook 13 is synchronized with the raising / lowering operation. Thus, the tension coil spring 24 is rotated while being pulled.
　　－車両のゲート開閉装置の作動－
　次に、本実施形態にかかる車両のゲート開閉装置１の作動について説明する。 -Operation of vehicle gate opening and closing device-
Next, the operation of the vehicle gate opening / closing device 1 according to the present embodiment will be described.
　図３に示すように、ダンプカー２の通常姿勢では、引っ張りコイルバネ２４により、連動棒１５がテールゲート９側に引っ張られ、フック１３が上向きに付勢されている。このことで、テールゲート９が走行時などに意図せず開かないようになっている。このとき、フック１３の側方係合部２２が係止ピン１２に側方（車両後方）から接触するので、ゲートが開くのが確実に防止される。一方、ゲートが開こうとする力は、フック１３の下方係合部２３にはほとんどかからないので、下方係合部２３と係止ピン１２とは、広範囲で接触する必要はない。このため、下方係合部２３の先端が尖っていて係止ピン１２に、（左右に伸びる直線上に）ほぼ線接触するような状態にあるが、フック１３のゲートが開こうとするのを止める作用は、ほとんど弱くなることはない。 As shown in FIG. 3, in the normal posture of the dump truck 2, the interlocking rod 15 is pulled toward the tailgate 9 by the tension coil spring 24, and the hook 13 is biased upward. This prevents the tailgate 9 from opening unintentionally when traveling. At this time, since the side engaging portion 22 of the hook 13 contacts the locking pin 12 from the side (rear side of the vehicle), the gate is reliably prevented from opening. On the other hand, since the force for opening the gate is hardly applied to the lower engaging portion 23 of the hook 13, the lower engaging portion 23 and the locking pin 12 do not need to contact in a wide range. For this reason, the tip of the lower engagement portion 23 is pointed and is in a state of almost line contact with the locking pin 12 (on a straight line extending from side to side), but the gate of the hook 13 is about to open. The stopping effect is hardly weakened.
　次いで、車台４の傾動シリンダを伸長させ、荷台５を起こす。すると、図４に示すように、荷台５が起きるのに伴って、連動棒支持ピン２０と、連結ピン１９と、フック回動軸１８とでつくられる三角形の形が変形し、フック回動軸１８を中心に、荷台５に対してフック１３の鉤部１３ａが下方へ回動する。 Next, the tilting cylinder of the chassis 4 is extended to raise the loading platform 5. Then, as shown in FIG. 4, as the loading platform 5 is raised, the triangular shape formed by the interlocking rod support pin 20, the connecting pin 19, and the hook rotation shaft 18 is deformed, and the hook rotation shaft is formed. With the center 18, the hook 13 a of the hook 13 rotates downward with respect to the loading platform 5.
　すると、フック１３の側方係合部２２と係止ピン１２との係合が解除され、二点鎖線で示すように、テールゲート９が自重により回動軸１０を中心に後方に（図１で反時計回りに）開き、荷台５内の土砂が排出される。 Then, the engagement between the side engaging portion 22 of the hook 13 and the locking pin 12 is released, and as shown by a two-dot chain line, the tailgate 9 moves rearward around the rotating shaft 10 by its own weight (FIG. 1). Open counterclockwise) and the sediment in the loading platform 5 is discharged.
　このとき排出された土砂が下方係合部２３上に流れ込むことがあるが、土砂は、傾斜面２３ａでガイドされながら振り分けられて下方にスムーズに流れ落ちるので、下方係合部２３上に土砂が堆積することはない。 At this time, the discharged earth and sand may flow onto the lower engaging portion 23. However, since the earth and sand are distributed while being guided by the inclined surface 23a and smoothly flow downward, the earth and sand accumulate on the lower engaging portion 23. Never do.
　土砂の排出後は、傾動シリンダを縮小させて荷台５を降ろす。このとき、再びテールゲート９が自重によって（図１で時計回りに）閉じてきて係止ピン１２が鉤部１３ａのテーパ面１３ｃに当接してフック１３を押し下げて下方に回動させる。そして、係止ピン１２が引っ張りコイルバネ２４で付勢されているフック１３の側方係合部２２に当接する。このとき、フック１３の下方係合部２３に土砂が堆積していないので、フック１３がスムーズに係止ピン１２に係合される。 After discharging the earth and sand, the tilting cylinder is reduced and the loading platform 5 is lowered. At this time, the tailgate 9 closes again by its own weight (clockwise in FIG. 1), and the locking pin 12 comes into contact with the tapered surface 13c of the flange 13a to push down the hook 13 and rotate downward. Then, the locking pin 12 comes into contact with the side engaging portion 22 of the hook 13 that is biased by the tension coil spring 24. At this time, since the earth and sand are not accumulated in the lower engaging portion 23 of the hook 13, the hook 13 is smoothly engaged with the locking pin 12.
　したがって、本実施形態にかかる車両のゲート開閉装置１によると、フック１３の平坦な側方係合部２２で係止ピン１２に側方から接触させると共に、断面が係止ピン１２に向かって徐々に小さくなる下方係合部２３で係止ピン１２に下方から当接させるようにしたことにより、別途手動式のロック解除装置を設けなくても、簡単な構成で、テールゲート９が開くのを防ぐ効果を保ちながら、排出時の異物の噛み込みを防いで車両のゲート開閉装置１を信頼性の高いものとすることができる。 Therefore, according to the gate opening / closing device 1 of the vehicle according to the present embodiment, the flat side engaging portion 22 of the hook 13 makes contact with the locking pin 12 from the side, and the cross section gradually approaches the locking pin 12. Since the lower engaging portion 23 is made to contact the locking pin 12 from below, the tailgate 9 can be opened with a simple configuration without providing a separate manual lock release device. It is possible to make the gate opening / closing device 1 of the vehicle highly reliable by preventing the foreign matter from being caught during discharge while maintaining the effect of preventing it.
　（その他の実施形態）
　本発明は、上記実施形態について、以下のような構成としてもよい。 (Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.
　すなわち、上記実施形態では、下方係合部２３は、山形鋼を溶接して形成しているが、フック１３に一体成形してもよい。 That is, in the above embodiment, the lower engaging portion 23 is formed by welding angle steel, but may be integrally formed with the hook 13.
　また、上記実施形態では、下方係合部２３は、山形の傾斜面２３ａを有するものとしたが、断面が係止ピン１２に向かって徐々に小さくなる、少なくとも１つの傾斜面２３ａを有するものであればどのような形状でもよく、また、先端が丸まっているものや、外周面が断面円弧状のものとしてもよい。外周面が断面円弧状の場合には、下方係合部２３の形状が丸みを帯びたものであれば、平坦なものに比べて異物が堆積しにくくなるので、異物がフック１３と係止ピン１２との間に噛み込むのが効果的に防止される。 Moreover, in the said embodiment, although the lower engaging part 23 shall have the mountain-shaped inclined surface 23a, it has the at least 1 inclined surface 23a from which a cross section becomes gradually small toward the locking pin 12. FIG. Any shape may be used, and the tip may be rounded, or the outer peripheral surface may be a circular arc. When the outer peripheral surface has a circular arc cross section, if the shape of the lower engaging portion 23 is rounded, foreign matter is less likely to accumulate as compared to a flat shape. It is effectively prevented to bite between the two.
　また、上記実施形態では、係止部として断面円形の係止ピン１２を例に挙げて説明したが、断面が多角形でもよく、さらには、テールゲート９に一体の部分でもよく、フック１３が係合可能な形状であればよい。 In the above embodiment, the locking pin 12 having a circular cross section has been described as an example of the locking portion. However, the cross section may be polygonal, and may be an integral part of the tailgate 9. Any shape that can be engaged is acceptable.
　また、上記実施形態では、テールゲート９の開閉装置を例に説明したが、荷台が車幅方向に起伏されるものであれば、サイドゲート８の開閉装置に適用してもよい。 In the above embodiment, the opening / closing device for the tailgate 9 has been described as an example. However, the opening / closing device for the side gate 8 may be applied as long as the loading platform is raised and lowered in the vehicle width direction.
　なお、以上の実施形態は、本質的に好ましい例示であって、本発明、その適用物や用途の範囲を制限することを意図するものではない。 In addition, the above embodiment is an essentially preferable example, and is not intended to limit the scope of the present invention, its application, and use.
　以上説明したように、本発明は、ダンプカーなどの車両のゲートを開閉させるゲート開閉装置について有用である。 As described above, the present invention is useful for a gate opening and closing device that opens and closes a gate of a vehicle such as a dump truck.
　　１　　　車両のゲート開閉装置
　　２　　　ダンプカー
　　５　　　荷台
　　９　　　テールゲート（ゲート）
　１０　　　回動軸
　１２　　　係止ピン（係止部）
　１３　　　フック
　２２　　　側方係合部
　２３　　　下方係合部
　２３ａ　　傾斜面 DESCRIPTION OF SYMBOLS 1 Vehicle gate opening and closing device 2 Dump truck 5 Loading platform 9 Tail gate (gate)
10 Rotating shaft 12 Locking pin (Locking part)
13 Hook 22 Side engagement portion 23 Lower engagement portion 23a Inclined surface

Claims (4)

  1. 　荷台に設けた回動軸を中心に下方から上方へ回動されて下開きするゲートと、
    　上記ゲートの下端部に設けられた係止部と、
    　上記荷台の傾動動作に合わせて回動し、上記係止部に下方から係合するフックとを備えた、車両のゲート開閉装置であって、
    　上記フックは、
    　　上記係止部に側方から接触する平坦な側方係合部と、
    　　上記係止部に下方から当接し、断面が係止部に向かって徐々に小さくなる下方係合部とを有している
    ことを特徴とする車両のゲート開閉装置。     A gate that pivots downward from above about a pivot shaft provided on the loading platform and opens downward;
    A locking portion provided at the lower end of the gate;
    A gate opening and closing device for a vehicle, comprising a hook that rotates in accordance with the tilting operation of the loading platform and engages the locking portion from below,
    The hook is
    A flat side engaging part that contacts the locking part from the side;
    A gate opening and closing device for a vehicle, comprising: a lower engaging portion that comes into contact with the locking portion from below and whose cross section gradually decreases toward the locking portion.
  2. 　請求項１に記載の車両のゲート開閉装置において、
    　下方係合部は、山形の傾斜面を有する
    ことを特徴とする車両のゲート開閉装置。     The gate opening and closing device for a vehicle according to claim 1,
    A gate opening and closing device for a vehicle, wherein the lower engaging portion has a mountain-shaped inclined surface.
  3. 　請求項１に記載の車両のゲート開閉装置において、
    　下方係合部は、外周面が断面円弧状である
    ことを特徴とする車両のゲート開閉装置。     The gate opening and closing device for a vehicle according to claim 1,
    A gate opening and closing device for a vehicle, wherein the lower engaging portion has an outer peripheral surface having a circular arc shape in cross section.
  4. 　請求項１乃至３のいずれか１つに記載の車両のゲート開閉装置において、
    　上記ゲートは、ダンプカーの後方に設けられたテールゲートである
    ことを特徴とする車両のゲート開閉装置。     The gate opening / closing device for a vehicle according to any one of claims 1 to 3,
    The gate opening and closing device for a vehicle, wherein the gate is a tailgate provided at the rear of the dump truck.
PCT/JP2010/005641 2009-09-17 2010-09-15 Opening/closing device for vehicle tailgate WO2011033771A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009216116 2009-09-17
JP2009-216116 2009-09-17

Publications (1)

Publication Number Publication Date
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ID=43758385

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Application Number Title Priority Date Filing Date
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102900288A (en) * 2012-10-31 2013-01-30 常熟华东汽车有限公司 Side door manual locking mechanism of wing-open type car
CN114212015A (en) * 2022-01-04 2022-03-22 桂林航天工业学院 Locking and opening mechanism for rear baffle of dump truck carriage body and using method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02262435A (en) * 1989-03-31 1990-10-25 Kyokuto Kaihatsu Kogyo Co Ltd Freight-train/dump car
JP2002144950A (en) * 2000-11-07 2002-05-22 Aizemu:Kk Binding hook

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02262435A (en) * 1989-03-31 1990-10-25 Kyokuto Kaihatsu Kogyo Co Ltd Freight-train/dump car
JP2002144950A (en) * 2000-11-07 2002-05-22 Aizemu:Kk Binding hook

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102900288A (en) * 2012-10-31 2013-01-30 常熟华东汽车有限公司 Side door manual locking mechanism of wing-open type car
CN114212015A (en) * 2022-01-04 2022-03-22 桂林航天工业学院 Locking and opening mechanism for rear baffle of dump truck carriage body and using method thereof

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