JPS632342Y2 - - Google Patents
Info
- Publication number
- JPS632342Y2 JPS632342Y2 JP18696383U JP18696383U JPS632342Y2 JP S632342 Y2 JPS632342 Y2 JP S632342Y2 JP 18696383 U JP18696383 U JP 18696383U JP 18696383 U JP18696383 U JP 18696383U JP S632342 Y2 JPS632342 Y2 JP S632342Y2
- Authority
- JP
- Japan
- Prior art keywords
- loading platform
- frame
- support shaft
- rod
- lever
- 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
- 230000002265 prevention Effects 0.000 claims description 2
- 238000005086 pumping Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
Landscapes
- Body Structure For Vehicles (AREA)
Description
【考案の詳細な説明】
この考案はダンプ車の荷台の下降を防止する荷
台下降防止装置に関するものである。[Detailed Description of the Invention] This invention relates to a loading platform lowering prevention device that prevents the loading platform of a dump truck from lowering.
従来のこの種の装置は第１図及び第２図に示す
ように、車輪１によつて走行可能なフレーム２の
後部に、支軸３によつて荷台４が起伏可能に軸支
され、荷台４とフレーム２との間には、上端部が
支軸５によつて荷台４の下部に軸支され、かつ下
端部がフレーム２に前後方向に装着されたレール
６に摺動可能な曲面部７が形成される安全棒８が
架設される。また、レール６の後部寄りには断面
形の係合凹部９が形成され、この係合凹部９に
係合し得る係合凸部１０が形成される断面が台形
をしたストツパ１１が着脱可能に装着される。 As shown in FIGS. 1 and 2, in a conventional device of this kind, a loading platform 4 is rotatably supported by a support shaft 3 at the rear of a frame 2 that can be moved by wheels 1. 4 and the frame 2, there is a curved surface portion whose upper end is pivotally supported on the lower part of the loading platform 4 by a support shaft 5, and whose lower end is slidable on a rail 6 attached to the frame 2 in the front-rear direction. A safety bar 8 on which 7 is formed is installed. Further, an engagement recess 9 having a cross-sectional shape is formed near the rear of the rail 6, and a stopper 11 having a trapezoidal cross section and having an engagement protrusion 10 that can be engaged with the engagement recess 9 is removably attached. It will be installed.
しかし、従来の装置では、荷台４を起状態にす
る度に安全棒８の前方への摺動を阻止するためス
トツパ１１を係合凹部９に係合装着しなければな
らず、大変面倒であり、そして、うつかりストツ
パ１１を装着するのを忘れた場合には、安全棒８
が前方へ摺動されてしまい、その機能が発揮され
ず、荷台４が起状態として保持されず下降してし
まうため、大変危険であり人身事故にもつながる
という問題がある。 However, in the conventional device, the stopper 11 must be fitted into the engagement recess 9 to prevent the safety rod 8 from sliding forward every time the loading platform 4 is raised, which is very troublesome. , and if you forget to attach the hold-down stopper 11, use the safety bar 8.
This is a problem in that it is extremely dangerous and can even lead to personal injury, as the loading platform 4 is not held in the upright position and falls, causing the loading platform 4 to slide forward and not perform its function.
この考案は以上に述べた事情に鑑みなされたも
ので、その目的は、安全棒の下端が、フレームに
前後方向に形成されるレールに沿つて摺設される
そり体に軸支され、そり体に係合部が形成され、
荷台が起状態とされる際に、安全棒の揺動ととも
にそり体が摺動されて前記係合部が係止可能とさ
れ、荷台の起状態が保持される係合片がフレーム
に支軸によつて軸支され、この支軸に、荷台の起
状操作をするレバーに連動されて、係合部と係合
片の係止状態を解除し得るアームが固着されるよ
うにし、荷台が起状態とされた際には、必らず安
全棒の下端がそり体を介してフレームに係止さ
れ、その機能を確実に発揮するようにし、また、
荷台を伏状態にする際には、荷台の起伏操作レバ
ーの操作だけでそり体の係止が解除されて容易に
伏状態とされ、ダンプ車の荷台の起伏操作をより
安全にするところのダンプ車の荷台下降防止装置
を提供することにある。 This idea was devised in view of the above-mentioned circumstances, and its purpose is to have the lower end of the safety rod pivoted on a sled body that slides along a rail formed in the front and back direction of the frame. An engaging portion is formed in the
When the loading platform is placed in the upright position, the sled body is slid along with the swinging of the safety rod so that the engaging portion can be locked, and the engaging piece that maintains the upright position of the loading platform is attached to the frame as a support shaft. An arm that can release the locked state between the engaging portion and the engaging piece is fixed to this support shaft in conjunction with a lever that raises the loading platform. When the safety rod is in the upright position, the lower end of the safety rod must be locked to the frame via the sled body to ensure its function.
When the loading platform is placed in the down position, the sled body is unlocked and placed in the down position simply by operating the lifting control lever on the loading platform, making it safer to operate the loading platform of the dump truck. An object of the present invention is to provide a device for preventing the lowering of a vehicle cargo platform.
以下添付図面に基づいてこの考案を詳細に説明
する。 This invention will be explained in detail below based on the accompanying drawings.
第３図から第６図はこの考案による装置を施こ
して成るダンプ車の概略側面図、ａ部詳細図、Ａ
−Ａ断面図及びＢ−Ｂ断面図で、図面中、２０は
車輪２１によつて走行可能なフレームで、フレー
ム２０の後部には荷台２２が支軸２３によつて起
伏可能に軸支される。なお、荷台２２の起伏動作
は図示を省略するシリンダによつて成される。荷
台２２の下方両側寄りには棒体である一対の安全
棒２４の上端部がそれぞれ支軸２５によつて前後
方向に揺動可能に軸支される。安全棒２４のそれ
ぞれ下端部は一対のそり体２６に支軸２７によつ
て前後方向に揺動可能に軸支される。一対のそり
体２６はフレーム２０の両側面に前後方向に長く
形成される断面字形の一対のレール２８の凹部
内に沿つて前後方向に摺動可能にそれぞれ配設さ
れる。また、一対のそり体２６の後端部に係合部
である凸部２９がそれぞれ形成され、凸部２９
は、フレーム２０に左右方向に貫通される支軸３
０によつて前後方向に揺動可能にそれぞれ軸支さ
れる一対の係合片３１と係止可能とされ、両凸部
２９がそれぞれ係合片３１に係止されると（第４
図に実線で示す）、両そり体２６の前方への摺動
が阻止される。支軸３０の両端部には両係合片３
１を揺動してそれぞれ凸部２９との係止状態を解
除し得る一対のアーム３２が固着される。 Figures 3 to 6 are schematic side views of a dump truck equipped with the device according to this invention, a detailed view of part a, and
- In the A cross-sectional view and the B-B cross-sectional view, 20 in the drawings is a frame that can run on wheels 21, and a loading platform 22 is rotatably supported at the rear of the frame 20 by a support shaft 23. . Incidentally, the raising and lowering movement of the loading platform 22 is performed by a cylinder, which is not shown. Upper end portions of a pair of safety rods 24, which are rod bodies, are respectively supported by support shafts 25 on both sides of the lower side of the loading platform 22 so as to be swingable in the front-rear direction. The lower end portions of each of the safety rods 24 are pivotally supported by a pair of sled bodies 26 by a support shaft 27 so as to be swingable in the front and rear direction. The pair of sled bodies 26 are disposed so as to be slidable in the front-rear direction along the recesses of a pair of cross-sectional rails 28 formed on both sides of the frame 20 to extend in the front-rear direction. Further, a protrusion 29 serving as an engaging portion is formed at the rear end portion of the pair of sled bodies 26, and the protrusion 29
is a support shaft 3 that passes through the frame 20 in the left and right direction.
0, and can be locked with a pair of engagement pieces 31 which are respectively pivotally supported so as to be swingable in the front-rear direction, and when both convex portions 29 are respectively locked with the engagement pieces 31 (fourth
(shown by solid lines in the figure), forward sliding of both sled bodies 26 is prevented. Both engaging pieces 3 are provided at both ends of the support shaft 30.
A pair of arms 32 are fixed to each other, each of which can be swung to release the locked state from the convex portion 29.
また、第７図及び第８図はこの考案による装置
を施こして成る前記ダンプ車の一部平面図及びＺ
矢視図で、前記一対のアーム３２はそれぞれロツ
ド３３及びベルクランク３４によつて、フレーム
２０の左右方向に配設され、かつ同方向に移動可
能なロツド３５に連絡され、ロツド３５の一端部
には、荷台２２の起伏操作をし得るダンプレバー
３６が連結される。また、ロツド３５はベルクラ
ンク３７によつて連結ロツド３８に連結され、連
結ロツド３８の端部は前記シリンダに油圧を圧送
するポンプの切換弁に連結される。なお、ベルク
ランク３４，３４及び３７にはそれぞれ一方のロ
ツドとの連結部分にあそびS1及びS2が設けられて
いる。また、一対のロツド３３はそれぞれスプリ
ング４０によつてアーム３２方向に押圧されてい
る。 Further, FIGS. 7 and 8 are a partial plan view and a Z
In the arrow view, the pair of arms 32 are connected by rods 33 and bell cranks 34 to a rod 35 that is disposed in the left-right direction of the frame 20 and movable in the same direction, and one end of the rod 35 A dump lever 36 that can raise and lower the loading platform 22 is connected to the dump lever 36 . The rod 35 is also connected to a connecting rod 38 by a bell crank 37, and the end of the connecting rod 38 is connected to a switching valve of a pump for pumping hydraulic pressure to the cylinder. Note that the bell cranks 34, 34, and 37 are provided with plays S1 and S2 at the connection portions with one of the rods, respectively. Further, the pair of rods 33 are each pressed in the direction of the arm 32 by a spring 40.
この考案による装置は以上述べたようであるか
ら、ダンプレバー３６を上○位置へ操作すると、ロ
ツド３５が矢印４１方向へ動き、両ベルクランク
３４がそれぞれ時計回りに回転するが、この際の
回転は両あそびS2のために空回転となるととも
に、両あそびS2によつてそれぞれスプリング４０
が機能し、両係合片３１の先端がそれぞれレール
２８に接するように押圧される。また、ロツド３
５の矢印４１方向の動きによつてベルクランク３
７が時計回りに回転され、連結ロツド３８を介し
て切換弁が操作されポンプにより油圧がシリンダ
に送られて荷台２２が徐々に起状態とされる。す
ると、第９図に示すように、両そり体２６が安全
棒２４に牽引されてそれぞれレール２８上を矢印
に示すように後方に向つて摺動されて行き、そり
体２６の後端部が係合片３１の先端部に当接する
と、両係合片３１をスプリング４０の押圧力に抗
して反時計回りに回転しつつ、更に後方に摺動さ
れ、第１０図に示すように、荷台２２が最大上昇
角附近において係合片３１の先端部が凸部２９を
乗り越えて、そり体２６上に当接され、スプリン
グ４０によつてそり体２６方向に押圧される。そ
して、荷台２２が同位置に起状態とされたらダン
プレバー３６を○中位置に戻し、ポンプによる油圧
の圧送が停止されると、荷台２２が少し下がると
ともに、そり体２６も第１１図に矢印で示すよう
に、少し前方に摺動され、係合片３１の先端部が
凸部２９に当接係止され、そり体２６の前方への
摺動が確実に阻止され、安全棒２４もそれ以上揺
動されないためにその機能を十分に発揮すること
が可能で、荷台２２は起状態で確実に保持され
る。 Since the device according to this invention is as described above, when the dump lever 36 is operated to the upper position, the rod 35 moves in the direction of the arrow 41, and both bell cranks 34 rotate clockwise. is idle due to both play S 2 , and the spring 40 is activated by both play S 2 .
functions, and the tips of both engaging pieces 31 are pressed so as to come into contact with the rails 28, respectively. Also, Rod 3
Bell crank 3 by movement in the direction of arrow 41 of 5.
7 is rotated clockwise, the switching valve is operated via the connecting rod 38, hydraulic pressure is sent to the cylinder by the pump, and the loading platform 22 is gradually raised to the raised state. Then, as shown in FIG. 9, both sled bodies 26 are pulled by the safety rod 24 and slid backward on the rails 28 as shown by the arrows, and the rear end of the sled body 26 is pulled by the safety rod 24. When it comes into contact with the tip of the engagement piece 31, both engagement pieces 31 are rotated counterclockwise against the pressing force of the spring 40 and further slid backward, as shown in FIG. When the loading platform 22 approaches its maximum upward angle, the tip of the engaging piece 31 passes over the convex portion 29 and comes into contact with the sled body 26, and is pressed toward the sled body 26 by the spring 40. When the loading platform 22 is raised to the same position, the dump lever 36 is returned to the middle position, and when the pump stops pumping the hydraulic pressure, the loading platform 22 is lowered a little and the sled body 26 is also moved as indicated by the arrow in FIG. As shown in , the engagement piece 31 is slid slightly forward, and the tip of the engagement piece 31 abuts and locks on the convex portion 29, and the forward sliding of the sled body 26 is reliably prevented, and the safety rod 24 is also prevented from sliding forward. Since it is not swung any further, it is possible to fully demonstrate its function, and the loading platform 22 is reliably held in the upright position.
また、荷台２２を伏状態にするには、ダンプレ
バー３６を一旦○上位置にして荷台２２を最大上昇
角附近にし、その状態でダンプレバー３６を下1
の位置にすると、ロツド３５が矢印４２方向に動
き（第７図に示す）、両ベルクランク３４及び両
ロツド３３を介して両アーム３２が凸部２９に妨
げられずにスプリング４０に抗して反時計回りに
回転され（第１２図に示す）、係合片３１の先端
部と凸部２９との係止状態が解除される。これ
は、ベルクランク３７のあそびS1によつて連結ロ
ツド３８は移動されず、切換弁は切換えられない
ため、少しの間荷台２２が最大上昇角附近で維持
されるため容易に解除可能である。そして、ダン
プレバー３６を下2位置まで操作すると、ロツド
３５が更に矢印４２方向に移動され、ベルクラン
ク３７が反時計回りに回転されて、連結ロツド３
８を介して切換弁が切換えられ、荷台２２が伏状
態とされる。 In addition, in order to place the loading platform 22 in the down position, first move the dump lever 36 to the upper position so that the loading platform 22 is near the maximum upward angle, and in that state, lower the dump lever 36 to the lower position.
When the rod 35 is in the position shown in FIG. It is rotated counterclockwise (as shown in FIG. 12), and the engagement between the tip of the engagement piece 31 and the protrusion 29 is released. This can be easily canceled because the connecting rod 38 is not moved by the play S 1 of the bell crank 37 and the switching valve is not switched, so the loading platform 22 is maintained near the maximum angle of rise for a short time. . Then, when the dump lever 36 is operated to the lower 2 position, the rod 35 is further moved in the direction of the arrow 42, the bell crank 37 is rotated counterclockwise, and the connecting rod 3
The switching valve is switched via 8, and the loading platform 22 is placed in the down position.
この考案による装置は以上に述べたようである
から、ダンプ車に施こした際には、ダンプレバー
の操作によつて荷台を起状態にした際には、安全
棒の下端がフレームに確実に係止され、荷台を起
状態に確実に保持でき、また、荷台を伏状態にす
る際には、ダンプレバーの操作のみで前記安全棒
の係止状態を解除して、同時に切換弁を切換えて
荷台を伏状態にすることができ、より安全でかつ
より操作が容易なダンプ車とすることができるも
のである。 Since the device based on this invention is as described above, when it is applied to a dump truck, when the loading platform is raised by operating the dump lever, the lower end of the safety rod is securely attached to the frame. When the loading platform is locked, the loading platform can be reliably held in the upright position, and when the loading platform is placed in the down position, the locking state of the safety rod can be released by simply operating the dump lever, and the switching valve can be switched at the same time. The loading platform can be laid down, making the dump truck safer and easier to operate.
また、この考案による装置に使用された前記係
合片３１の替わりに、第１３図及び第１４図にこ
の考案による装置の別の実施例の要部側面図及び
Ｃ−Ｃ断面図を示すが、同図面中に示すように、
前記支軸３０によつてフレーム２０に軸支される
係合片本体３２′ａの基部に、当該係合片本体３
２′ａの時計方向回りの回転を係合片本体３２′ａ
がほぼ垂下された位置において阻止し得る突起部
３２′ｂが長手方向にほぼ直交する方向に突出さ
れて成る係合片３２′と、前記突起部３２′ｂが当
接係止されて、前記係合片本体３２′ａの回転を
阻止し、かつフレーム２０の両側部に突設される
受け部４３とを備えることによつても前記同様の
効果を有するものである。 Furthermore, in place of the engaging piece 31 used in the device according to this invention, FIGS. 13 and 14 show a side view and a cross-sectional view of main parts of another embodiment of the device according to this invention. , as shown in the same drawing,
The engagement piece body 3 is attached to the base of the engagement piece body 32'a that is pivotally supported on the frame 20 by the support shaft 30.
The clockwise rotation of engagement piece body 32'a
The projection 32'b is abutted and locked with the engagement piece 32', which is formed by a projection 32'b protruding in a direction substantially perpendicular to the longitudinal direction, which can prevent the projection 32'b from being in a substantially hanging position. The same effect as described above can also be obtained by providing receiving portions 43 which prevent the engagement piece main body 32'a from rotating and which protrude from both sides of the frame 20.
第１図及び第２図は従来の装置を施こして成る
ダンプ車を示す概略側面図及び一部断面図、第３
図から第６図はこの考案による装置を施こして成
るダンプ車の概略側面図、ａ部詳細図、Ａ−Ａ断
面図及びＢ−Ｂ断面図、第７図及び第８図は第６
図に示すダンプ車の一部平面図及びＺ矢視図、第
９図から第１２図はこの考案による装置の要部の
それぞれ動作説明図、第１３図及び第１４図はこ
の考案の他の実施例による装置の要部を示す側面
図及びＣ−Ｃ断面図である。
なお図面において、２０……フレーム、２１…
…車輪、２２……荷台、２４……棒体（安全棒）、
２６……そり体、２８……レール、２９……係合
部、３０……支軸、３１……係合片、３２……ア
ーム、３６……レバー（ダンプレバー）、である。
Figures 1 and 2 are a schematic side view and a partial cross-sectional view of a dump truck equipped with a conventional device;
6 to 6 are schematic side views, detailed views of part a, sectional views taken along A-A and sectional views taken along B-B, and FIGS.
A partial plan view and a Z arrow view of the dump truck shown in the figure, FIGS. 9 to 12 are operational explanatory diagrams of the main parts of the device according to this invention, and FIGS. FIG. 2 is a side view and a cross-sectional view taken along the line C-C of the apparatus according to the embodiment. In the drawings, 20...frame, 21...
...wheels, 22...carriage platform, 24...rod (safety rod),
26... Sled body, 28... Rail, 29... Engaging portion, 30... Support shaft, 31... Engaging piece, 32... Arm, 36... Lever (dump lever).
Claims (1)
可能に枢着されるダンプ車において、前記荷台の
下方に上端部が軸支され、かつ下端部が前記フレ
ームに前後方向に装着されるレール上を摺動する
そり体に軸支されて成る棒体が前記荷台とフレー
ム間に架設され、前記そり体に係合部が形成さ
れ、前記荷台が起状態とされる際に、前記棒体の
揺動とともにそり体が摺動されて前記係合部が係
止可能とされ、前記荷台の起状態を保持する係合
片が前記フレームに支軸によつて軸支され、この
支軸に、前記荷台の起伏操作をするレバーに連動
されて、前記係合部と係合片の係止状態を解除し
得るアームが固着されて成るダンプ車の荷台下降
防止装置。 In a dump truck in which a loading platform is pivotably mounted on a frame that can be moved by wheels, the upper end is pivotally supported below the loading platform, and the lower end is mounted on a rail attached to the frame in the front-rear direction. A rod body pivotally supported by a sliding sled body is installed between the loading platform and the frame, an engaging portion is formed on the sled body, and when the loading platform is raised, the rod body swings. The sled body is slid along with the movement so that the engaging portion can be locked, and an engaging piece that maintains the upright state of the loading platform is pivotally supported on the frame by a support shaft, and the support shaft is attached to the support shaft. A loading platform lowering prevention device for a dump truck, comprising an arm fixed to a lever that can release the engagement between the engaging portion and the engaging piece in conjunction with a lever for raising and lowering the loading platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18696383U JPS6093529U (en) | 1983-12-05 | 1983-12-05 | Dump truck platform lowering prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18696383U JPS6093529U (en) | 1983-12-05 | 1983-12-05 | Dump truck platform lowering prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6093529U JPS6093529U (en) | 1985-06-26 |
| JPS632342Y2 true JPS632342Y2 (en) | 1988-01-21 |
Family
ID=30403693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18696383U Granted JPS6093529U (en) | 1983-12-05 | 1983-12-05 | Dump truck platform lowering prevention device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6093529U (en) |
-
1983
- 1983-12-05 JP JP18696383U patent/JPS6093529U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6093529U (en) | 1985-06-26 |
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