JPH0120092B2 - - Google Patents
Info
- Publication number
- JPH0120092B2 JPH0120092B2 JP1079285A JP1079285A JPH0120092B2 JP H0120092 B2 JPH0120092 B2 JP H0120092B2 JP 1079285 A JP1079285 A JP 1079285A JP 1079285 A JP1079285 A JP 1079285A JP H0120092 B2 JPH0120092 B2 JP H0120092B2
- Authority
- JP
- Japan
- Prior art keywords
- rear door
- support arm
- arm
- cargo
- dump truck
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- 230000003014 reinforcing effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Vehicle Step Arrangements And Article Storage (AREA)
Description
【発明の詳細な説明】
(1) 発明の目的
本発明は簡便にして確実に開閉し且つ経済的な
しかも極めて能率的なダンプカーのリアドア開閉
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (1) Object of the Invention The present invention relates to a rear door opening/closing device for a dump truck that is simple, reliable, economical, and extremely efficient.
通常ダンプカーのリアドアは、荷台の左右両縁
端部において回転自在に枢着されており、積荷ダ
ンプの際の荷台の上昇による開閉装置の作動によ
つてケヤツチが解除し、且つ積荷の押圧力によつ
てリアドアが開くようになつている。このため積
荷が砂利や砂等であれば荷降し作業には特別の支
障はないが、積荷が大石、大木根、廃材等積荷の
高さがリアドアの高さより大きいものである場合
やこれらの積荷のように重量大なるものである場
合は積荷はリアドアの頂部につかえてダンプ作業
が困難となるばかりでなく、積荷がリアドアに激
突してこれを損傷し時には、リアドアにつかえた
積荷の重さによつて車体前部が逆立ち状態となり
転倒の危険さえ生ずる。特にダンプ場所が高い道
路側である場合車体が道路下に転落することも稀
ではなくこの種の事故の絶えないのが現状であ
る。また砂利や砂のようなダンプしやすい積荷で
も地上に降りた荷がリアドアにつかえるので積荷
を完全にダンプする迄には、２回乃至３回ダンプ
カーを少しずつ前進させて作業を進めなければな
らないという不便さがある。このようなリアドア
の損傷や事故を防止するため、或はダンプ場所が
狭小でダンプカーを移動しながらでなければダン
プできないところでは、予めリアドアを取り外し
てからダンプ作業を行うことも暫々であつてダン
プ作業の能率低下という結果を来たしている。 Normally, the rear door of a dump truck is rotatably attached to both the left and right edges of the loading platform, and when the loading platform is raised during cargo dumping, the opening/closing device is activated, and the key is released. The rear door can now be opened. For this reason, if the cargo is gravel or sand, there is no particular problem in unloading, but if the cargo is larger than the height of the rear door, such as large stones, large tree roots, or waste materials, If the cargo is heavy, it will not only get stuck on the top of the rear door, making dumping operations difficult, but also cause the cargo to crash into the rear door and damage it, causing the weight of the cargo stuck on the rear door to be damaged. This may cause the front of the vehicle to stand on its head, creating the risk of it falling over. Especially when the dump site is on a high road side, it is not uncommon for the vehicle to fall onto the road, and this type of accident is a constant occurrence. In addition, even if the load is easy to dump, such as gravel or sand, the load on the ground can get caught in the rear door, so it is necessary to move the dump truck forward two or three times little by little until the load is completely dumped. This is an inconvenience. In order to prevent damage to the rear door and accidents like this, or where the dumping area is so small that dumping cannot be done without moving the dump truck, it may be advisable to remove the rear door before starting the dumping operation. This results in a decrease in the efficiency of dumping operations.
出願人は前記のような危険を防止すると共に車
体の損傷をなくし、且つダンプ作業の能率向上が
期待できる簡便にして経済的なダンプカーのリア
ドア開閉装置を提供せんとするものである。 The applicant aims to provide a simple and economical rear door opening/closing device for a dump truck that prevents the above-mentioned dangers, eliminates damage to the vehicle body, and can be expected to improve the efficiency of dumping operations.
以下本発明の実施例である図面に従つて説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.
(2) 発明の構成について
本発明は上記のような目的を達成するため次の
ような構成を有している。以下実施例である図面
に従つて説明する。(2) Regarding the structure of the invention The present invention has the following structure in order to achieve the above object. Embodiments will be described below with reference to the drawings.
第１図に示すように本発明は、取付孔７を有す
る底板３に回転アーム４を上下回動自在に〓着し
ている。８はその回転軸で、回転アーム４の先端
には支持アーム案内兼支持枠６が一体として構成
されている。９は補強側板で、支持アーム案内兼
支持枠６と回転アーム４とを一体的に構成してあ
る。なお支持アーム案内兼支持枠６を回転アーム
４の先端部に構成する際溶接などによつて強固に
固定すれば格別に補強側板９を設けなくともよい
が、これを設けることにより装置内への土砂の侵
入防止と回転アーム４の湾曲化を防止するという
作用効果も有するので、補強側板９を設けた方が
装置全体としてはより効果的である。１０は回転
軸８の軸受で底板３に一体として設けてある。次
に、支持アーム２は底板３の適宜位置に上下回動
自在なるよう〓着されており、１１はその回転軸
で、１２は軸受であつて底板３に一体として設け
てある。 As shown in FIG. 1, in the present invention, a rotary arm 4 is attached to a bottom plate 3 having a mounting hole 7 so as to be movable up and down. Reference numeral 8 denotes the rotation axis, and a support arm guide/support frame 6 is integrally formed at the tip of the rotation arm 4. Reference numeral 9 denotes a reinforcing side plate, which integrally constitutes the support arm guide/support frame 6 and the rotating arm 4. Note that when constructing the support arm guide/support frame 6 at the tip of the rotary arm 4, if it is firmly fixed by welding or the like, there is no need to provide the reinforcing side plate 9; Since it also has the effect of preventing the intrusion of earth and sand and preventing the rotating arm 4 from curving, the provision of the reinforcing side plate 9 is more effective for the device as a whole. Reference numeral 10 denotes a bearing for the rotating shaft 8, which is integrally provided on the bottom plate 3. Next, the support arm 2 is mounted at an appropriate position on the bottom plate 3 so as to be able to move up and down, and 11 is a rotating shaft thereof, and 12 is a bearing, which is integrally provided on the bottom plate 3.
なお、本実施例のように、支持アーム２と回転
アーム４の長さを同一とし回転アーム４の先端
（支持アーム案内兼支持枠６）位置がリアドア１
の閉扉時において支持アーム２の中間位置となる
ように構成した場合、リアドア１の最大開扉位置
（荷台側板上縁にたいして支持アーム２が垂直の
位置）で支持アーム案内兼支持枠６の位置がドア
回転軸受１４の位置となるから支持アーム２は90
℃以上回動しないし支持２に対する回転アーム４
の支持力及び横揺防止力が最大となる。 Note that, as in this embodiment, the length of the support arm 2 and the rotary arm 4 are the same, and the tip of the rotary arm 4 (the support arm guide/support frame 6) is located at the rear door 1.
If the support arm 2 is configured to be in an intermediate position when the door is closed, the position of the support arm guide/support frame 6 will be at the maximum open position of the rear door 1 (the position where the support arm 2 is perpendicular to the upper edge of the cargo bed side plate). Since it is the position of the door rotation bearing 14, the support arm 2 is 90
Rotating arm 4 relative to support 2 does not rotate more than ℃
The supporting force and anti-rolling force are maximized.
次に支持アーム２の先端上部にはドア回転軸１
３の軸受１４が一体として設けてあり、ドア回転
軸１３が〓着されている。なお１５はリアドア取
り付け金具でドア回転軸１３と一体に形成（第１
図Ｇ）又は別体として構成（第１図Ｈ）され組み
付けられている。リアドア１はこのリアドア取付
金具１５に取付け固定される。 Next, the door rotation shaft 1 is attached to the top of the support arm 2.
Three bearings 14 are integrally provided, and the door rotation shaft 13 is attached thereto. Note that 15 is a rear door mounting bracket formed integrally with the door rotation shaft 13 (the first
(Fig. G) or constructed as a separate body (Fig. 1 H) and assembled. The rear door 1 is attached and fixed to this rear door mounting bracket 15.
なお、支持アーム２は回転アーム４の支持アー
ム案内兼支持枠６に摺動自在なるよう内嵌挿して
回転軸１１に〓着してある。 The support arm 2 is slidably inserted into the support arm guide/support frame 6 of the rotation arm 4 and attached to the rotation shaft 11.
(3) 発明の作用について
本発明は以上のような構成を有するが、次にそ
の作用について述べる。(3) Regarding the operation of the invention The present invention has the above configuration, and its operation will be described next.
第２図に示すように本装置の底板３を荷台側板
上縁５にその先端と支持アーム２の先端とを一致
せしめて載置しビス１６等で取付け固定する。 As shown in FIG. 2, the bottom plate 3 of this device is placed on the upper edge 5 of the side plate of the loading platform with its tip aligned with the tip of the support arm 2, and fixed by screws 16 or the like.
次にリアドア１をリアドア取付金具１５に取付
ける。１７はその取付けビスである。積荷１８を
ダンプするため荷台２３が上昇し初めるとキヤツ
チ１９が解除され積荷１８が下降してリアドア１
に当るとリアドア１はドア回転軸１３を軸として
開扉（矢印２０）の方向へ回動し且つ積荷１８の
降下する力が大なればなるほど支持アーム２が支
持アーム回転軸１１を軸として上方（矢印２１）
へ回動運動する。然るときは支持アーム２が支持
アーム案内兼支持枠６内において回転アーム４の
先端部に前記回動運動を衝撃として伝えるから回
転アーム４も回転軸８を軸として上方回動運動
（矢印２２）する。 Next, the rear door 1 is attached to the rear door mounting bracket 15. 17 is its mounting screw. When the cargo platform 23 begins to rise to dump the cargo 18, the catch 19 is released and the cargo 18 descends to the rear door 1.
, the rear door 1 rotates in the direction of opening (arrow 20) about the door rotation axis 13, and the greater the force of the load 18 to fall, the more the support arm 2 moves upward about the support arm rotation axis 11. (arrow 21)
make a rotational movement. In this case, the support arm 2 transmits the rotational movement as an impact to the tip of the rotational arm 4 within the support arm guide and support frame 6, so that the rotational arm 4 also rotates upward about the rotational shaft 8 (arrow 22). )do.
これら支持アーム２及び回転アーム４の上方回
動による最大積荷開口巾は支持アーム２が荷台側
板上縁５に対して垂直に位置した場合といえる。 The maximum load opening width due to the upward rotation of the support arm 2 and the rotary arm 4 can be said to be when the support arm 2 is positioned perpendicularly to the upper edge 5 of the cargo platform side plate.
いずれにしても積荷降下の衝撃力によつてリア
ドア１が回動すると共に支持アーム２及び回転ア
ーム４が上昇回動して衝撃力を吸収すると共に積
荷の降下口を大きく開くことになる。 In any case, the rear door 1 rotates due to the impact force of lowering the load, and the support arm 2 and rotating arm 4 rotate upward to absorb the impact force and widen the opening for the load to drop.
(4) 発明の効果について
本発明は以上のような構成及び作用を有するか
ら積荷１８が勢いよくリアドア１に撃突してもリ
アドア１及び支持アーム２並びに回転アーム４が
それぞれ回転軸１３，１１，８を軸として上昇回
動してリアドア１の積荷の衝撃力を吸収してリア
ドア１の損傷を防止し、更に積荷の降下口を大き
く開口するので大塊の積荷１８でも容易に地上へ
とダンプされると共にリアドア１が積荷の降下を
邪魔しないから従来より荷台が遠く離れた位置に
荷降しが可能であり、従つて荷降しのためダンプ
カーを前方に移動する必要もないから作業の能率
も一層向上する。次に、支持アーム２はその先端
に重量大なるリアドア１を吊下げているからその
上昇回転のさい横揺れするのが常であるが、本発
明においては、回転アーム４を設けたことにより
支持アーム２を一層強固に支持しその横揺れを防
止する効果を有する。また従来のように積荷がリ
アドア１に支えて荷重が荷台の尾部に集中するこ
とも回避できるのでダンプカーの転倒などの事故
も防止可能である等多くの効果を有する。(4) Effects of the Invention Since the present invention has the above-described structure and operation, even if the cargo 18 hits the rear door 1 with force, the rear door 1, the support arm 2, and the rotating arm 4 will not move around the rotating shafts 13, 11, respectively. , 8, and absorbs the impact force of the cargo on the rear door 1 to prevent damage to the rear door 1.Furthermore, since the cargo drop port is wide open, even large cargoes 18 can easily reach the ground. Since the rear door 1 does not interfere with the lowering of the load as it is being dumped, it is possible to unload the load at a position further away from the loading platform than before, and there is no need to move the dump truck forward for unloading, making the work easier. Efficiency will also be further improved. Next, since the support arm 2 suspends the heavy rear door 1 from its tip, it normally sways when it rotates upward, but in the present invention, the rotation arm 4 is provided to support the rear door 1. This has the effect of supporting the arm 2 more firmly and preventing it from rolling. Furthermore, it is possible to avoid the conventional case where the load is supported by the rear door 1 and the load is concentrated on the tail of the loading platform, so accidents such as tipping over of the dump truck can be prevented, and many other effects are achieved.
図面は実施例を示すもので第１図Ａは右側面
図、Ｂは左側面図、Ｃは平面図、Ｄは拡大正面
図、ＥはＣ図におけるＡ−Ａ断面図、Ｆは支持ア
ームを上方に回動した状態を示す説明側面図であ
る。なお補強板は荷台内側面に位置するよう構成
してある。Ｇは取付金具とリアドア回転軸とを一
体に形成した実施例の拡大説明側面図、Ｈは取付
金具とリアドア回転軸を別体として設けこれを回
転自由に組合せ構成した実施例の拡大説明側面図
である。第２図は本発明装置をダンプカーの荷台
に装着したその作用図で、点線で示すリアドア及
び支持アーム並びに回転アームの位置は積荷落下
口の最大開扉位置を示すものである。
１……リアドア、２……支持アーム、３……底
板、４……回転アーム、５……荷台側板上縁、６
……支持アーム案内兼支持枠。
The drawings show the embodiment. Figure 1A is a right side view, B is a left side view, C is a plan view, D is an enlarged front view, E is a sectional view taken along line A-A in Figure C, and F is a support arm. It is an explanatory side view showing the state where it rotated upwards. The reinforcing plate is configured to be located on the inside surface of the loading platform. G is an enlarged explanatory side view of an embodiment in which the mounting bracket and the rear door rotation shaft are integrally formed, and H is an enlarged explanatory side view of an embodiment in which the mounting bracket and the rear door rotation shaft are provided separately and are freely rotatably combined. It is. FIG. 2 is an operational diagram of the device of the present invention installed on the loading platform of a dump truck, and the positions of the rear door, support arm, and rotating arm shown by dotted lines indicate the maximum opening position of the load drop port. 1... Rear door, 2... Support arm, 3... Bottom plate, 4... Rotating arm, 5... Upper edge of loading platform side plate, 6
...Support arm guide and support frame.
Claims (1)
るよう構成した底板３に、先端部に支持アーム２
の案内兼支持枠６を構成してなる回転アーム４を
上下回動自在なるよう〓着し、他方先端部にリア
ドア１を回転自在に取り付け可能に構成した支持
アーム２を前記支持枠６に摺動自在なる如く内嵌
挿し且つ底板３上に上下回動可能に〓着してなる
ことを特徴とするダンプカーのリアドア開閉装
置。1 A support arm 2 is attached to the tip of the bottom plate 3, which is configured so that it can be attached to the upper edge 5 of the side plate of the dump truck.
A rotary arm 4, which constitutes a guide and support frame 6, is mounted so as to be able to move up and down, and a support arm 2, which has a rear door 1 rotatably attached to its tip, is slid onto the support frame 6. A rear door opening/closing device for a dump truck, characterized in that the rear door opening/closing device for a dump truck is fitted into the interior so as to be movable and mounted on a bottom plate 3 so as to be movable up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1079285A JPS61171633A (en) | 1985-01-25 | 1985-01-25 | Rear door opening and closing device of dump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1079285A JPS61171633A (en) | 1985-01-25 | 1985-01-25 | Rear door opening and closing device of dump truck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61171633A JPS61171633A (en) | 1986-08-02 |
| JPH0120092B2 true JPH0120092B2 (en) | 1989-04-14 |
Family
ID=11760191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1079285A Granted JPS61171633A (en) | 1985-01-25 | 1985-01-25 | Rear door opening and closing device of dump truck |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61171633A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5174632A (en) * | 1985-07-25 | 1992-12-29 | Philippi-Hagenbuch, Inc. | No-bounce tailgate assembly |
| US5249843A (en) * | 1985-07-25 | 1993-10-05 | Hagenbuch Roy George Le | No-bounce tailgate assembly |
| US5080442A (en) * | 1989-02-21 | 1992-01-14 | Brinly-Hardy Co., Inc. | Collector cart |
-
1985
- 1985-01-25 JP JP1079285A patent/JPS61171633A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61171633A (en) | 1986-08-02 |
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