JP2525922Y2 - Safety device for dump truck with crane - Google Patents
Safety device for dump truck with craneInfo
- Publication number
- JP2525922Y2 JP2525922Y2 JP1990074728U JP7472890U JP2525922Y2 JP 2525922 Y2 JP2525922 Y2 JP 2525922Y2 JP 1990074728 U JP1990074728 U JP 1990074728U JP 7472890 U JP7472890 U JP 7472890U JP 2525922 Y2 JP2525922 Y2 JP 2525922Y2
- Authority
- JP
- Japan
- Prior art keywords
- crane
- packing box
- boom
- hydraulic
- switching valve
- 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 - Lifetime
Links
Landscapes
- Jib Cranes (AREA)
Description
【考案の詳細な説明】 （ａ）産業上の利用分野 本考案はクレーン付ダンプ車において、クレーンの格
納時に誤って荷箱を上昇させた時の安全装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a safety device for a dump truck with a crane when the packing box is erroneously raised when the crane is stored.
（ｂ）従来の技術 従来のクレーン付ダンプ車は、車体上に荷箱を傾動可
能に搭載し、この荷箱の前方の車体上にはブームを後方
の荷箱上に格納するクレーンを搭載している。(B) Conventional technology A conventional dump truck with a crane has a packing box mounted on a vehicle body in a tiltable manner, and a crane for storing a boom on a rear packing box is mounted on a vehicle body in front of the packing box. ing.
（Ｃ）考案が解決しようとする課題 前記構造のため、クレーンの格納時に誤って荷箱を上
昇させると荷箱の前壁がクレーンのブームに当たって前
壁やクレーンのブームが損傷するという問題があった。(C) Problems to be Solved by the Invention Due to the above structure, there is a problem that the front wall of the packing box hits the crane's boom and the front wall and the crane's boom are damaged if the packing box is accidentally raised when the crane is stored. Was.
そこで、この考案の目的は、クレーンの格納時に誤って
荷箱を上昇させても荷箱の前壁がクレーンのブームに当
たらないようにすることにある。Therefore, an object of the present invention is to prevent the front wall of the packing box from hitting the crane's boom even if the packing box is accidentally raised when the crane is stored.
（ｄ）課題を解決するための手段 上記目的を達成するためこの考案は、油圧ポンプから
の作動油を油圧回路中の油圧シリンダ内に流入させこの
油圧シリンダの伸長作動により傾動する荷箱を車体上に
搭載し、前記荷箱の前方の車体上にはブームを後方の荷
箱上に格納するクレーンを搭載してなるクレーン付ダン
プ車において、前記油圧回路中に油圧ポンプからの作動
油をオイルタンクにバイパスさせるバイパス切換弁を設
け、荷箱の前壁に対応するクレーンのブームの下面に
は、荷箱が傾動して荷箱の前壁が前記クレーンのブーム
に当接したことを感知し、前記バイパス切換弁を切換え
る感知装置を設けたことである。(D) Means for Solving the Problems In order to achieve the above object, the present invention relates to a method in which hydraulic oil from a hydraulic pump is caused to flow into a hydraulic cylinder in a hydraulic circuit, and a packing box which is tilted by extension operation of the hydraulic cylinder is mounted on a vehicle body. A dump truck with a crane mounted on a vehicle body in front of the packing box and storing a boom in a packing box behind the packing box, hydraulic oil from a hydraulic pump is supplied to the hydraulic circuit in the hydraulic circuit. A bypass switching valve for bypassing the tank is provided, and on the lower surface of the crane boom corresponding to the front wall of the packing box, it is sensed that the packing box tilts and the front wall of the packing box comes into contact with the crane boom. And a sensing device for switching the bypass switching valve.
（ｅ）作用 クレーンの格納時に誤って荷箱を傾動させると、クレ
ーンのブームの下面に設けた感知装置が感知して、油圧
回路中のバイパス切換弁が切換わる。すると、油圧ポン
プからの作動油はオイルタンクにバイパスし、荷箱の傾
動は停止し、荷箱の前壁とクレーンのブームとの当たり
は防止される。(E) Operation If the crane is tilted by mistake during storage of the crane, the sensing device provided on the lower surface of the crane boom senses and switches the bypass switching valve in the hydraulic circuit. Then, the hydraulic oil from the hydraulic pump is bypassed to the oil tank, the tilting of the packing box is stopped, and the collision between the front wall of the packing box and the crane boom is prevented.
（ｆ）実施例 以下、本考案の一実施例を図面に基づいて説明する。(F) Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
（１）は車体（２）上に後方傾動可能に搭載した荷箱
で、この荷箱（１）の前方の車体（２）上には操作レバ
ー（３）……により操作されるクレーン（４）が搭載さ
れ、こ のクレーン（４）はブーム（５）を後方の荷箱
（１）上に格納するようになっている。(1) is a packing box mounted on the vehicle body (2) so as to be tiltable rearward. A crane (4) operated by an operation lever (3) on the vehicle body (2) in front of the packing box (1). ), And the crane (4) stores the boom (5) on the rear packing box (1).
次にクレーン（４）のブーム（５）の下面に設けた感
知装置（７）を説明すると、（８）はコードスイッチ
（加圧導電ゴム製感圧センサ）で、このコードスイッチ
（８）は、中間に加圧導電ゴム（９）を狭持した上下一
対の平編線（10）（10）を内装したシリコンゴム（11）
と、荷箱（１）の前壁（12）に対応するクレーン（４）
のブーム（５）の下面に固定され、前記シリコンゴム
（11）を支持する支持部材（13）と、リード線（14）と
より構成されている。Next, the sensing device (7) provided on the lower surface of the boom (5) of the crane (4) will be described. (8) is a code switch (pressure sensor made of a pressurized conductive rubber), and this code switch (8) Silicon rubber (11) with a pair of upper and lower flat braided wires (10) (10) sandwiching a pressurized conductive rubber (9) in the middle
And the crane (4) corresponding to the front wall (12) of the packing box (1)
A support member (13) fixed to the lower surface of the boom (5) and supporting the silicon rubber (11), and a lead wire (14).
前記コードスイッチ（８）は、クレーン（４）の格納
時に誤って荷箱（１）を上昇させた時、荷箱（１）の前
壁（12）の加圧により「接」となるようになっている。
次に第４図の油圧回路と電気回路とを説明すると、（1
7）は油圧ポンプ、（18）は荷箱（１）の昇降及び停止
を行なうとともに荷箱（１）の停止時にクレーン（４）
のコントロールバルブ（図示せず）へ作動油を送る制御
弁で、この制御弁（18）と油圧シリンダ（19）とは主配
管（20）にて連絡し、この主配管（20）の途中とオイル
タンク（21）との補助配管（22）にはバイパス切換弁
（23）を介装してある。The code switch (8) is designed to be brought into contact with the front wall (12) of the packing box (1) when the packing box (1) is erroneously raised when the crane (4) is stored. Has become.
Next, the hydraulic circuit and the electric circuit of FIG. 4 will be described.
7) is a hydraulic pump, (18) lifts and stops the packing box (1) and crane (4) when the packing box (1) is stopped.
This control valve sends hydraulic oil to a control valve (not shown). The control valve (18) and the hydraulic cylinder (19) communicate with each other via a main pipe (20). An auxiliary pipe (22) to the oil tank (21) is provided with a bypass switching valve (23).
前記バイパス切換弁（23）はソレノイド（24）とスプ
リング（25）とにより切換わる２位置切換弁で、前記ソ
レノイド（24）は主回路（26）に介装され、この主回路
（26）には前記コードスイッチ（８）が設けられてい
る。The bypass switching valve (23) is a two-position switching valve switched by a solenoid (24) and a spring (25). The solenoid (24) is interposed in a main circuit (26). Is provided with the code switch (8).
本考案は前記の如き構成で、次に作用について説明す
る。The present invention is configured as described above, and the operation will be described below.
荷箱（１）を後方傾動させる場合には、まず制御弁
（18）を中立位置にして油圧ポンプ（17）から作動油を
送るとともにクレーン（４）の操作レバー（３）……を
操作してブーム（５）を後方の格納位置より前方に移動
させる。When the packing box (1) is tilted backward, first, the control valve (18) is set to the neutral position, hydraulic oil is sent from the hydraulic pump (17), and the operating lever (3) of the crane (4) is operated. To move the boom (5) forward from the rear storage position.
その後、切換弁（18）を右位置に切換えると油圧ポン
プ（17）からの作動油は油圧シリンダ（19）に流入し、
荷箱（１）は後方傾動する。Then, when the switching valve (18) is switched to the right position, the hydraulic oil from the hydraulic pump (17) flows into the hydraulic cylinder (19),
The packing box (1) tilts backward.
次にクレーン（４）のブーム（５）が格納位置のまま
誤って制御弁（18）を右位置にして油圧ポンプ（17）か
らの作動油を油圧シリンダ（19）に流入させると荷箱
（１）は後方傾動し、荷箱（１）の前壁（12）がクレー
ン（４）のブーム（５）の下面に設けられたコードスイ
ッチ（８）に当接し、コードスイッチ（８）を加圧す
る。するとコードスイッチ（８）が「断」より「接」と
なり、ソレノイド（24）が励磁されてバイパス切換弁
（23）は左位置となり、油圧ポンプ（17）からの作動油
はバイパス切換弁（23）を通ってオイルタンク（21）に
バイパスされ、荷箱（１）の後方傾動は停止し、荷箱
（１）の前壁（６）とクレーン（４）のブーム（５）と
の当たりは防止される。Next, when the boom (5) of the crane (4) erroneously moves the control valve (18) to the right position in the retracted position and the hydraulic oil from the hydraulic pump (17) flows into the hydraulic cylinder (19), the cargo box ( 1) is tilted backward, the front wall (12) of the packing box (1) comes into contact with the cord switch (8) provided on the lower surface of the boom (5) of the crane (4), and the cord switch (8) is applied. Press. Then, the code switch (8) changes from "disconnect" to "contact", the solenoid (24) is excited, the bypass switching valve (23) is at the left position, and the hydraulic oil from the hydraulic pump (17) is supplied to the bypass switching valve (23). ) And is bypassed to the oil tank (21), the backward tilt of the packing box (1) stops, and the collision between the front wall (6) of the packing box (1) and the boom (5) of the crane (4) is established. Is prevented.
（ｇ）考案の効果 以上の如く本考案は、油圧回路中に油圧ポンプからの
作動油をオイルタンクにバイパスさせるバイパス切換弁
を設け、クレーンのブームの下面に荷箱が傾動して荷箱
の前壁がクレーンのブームに当接するのを感知し、バイ
パス切換弁を切換える感知装置を設けたので、クレーン
の格納時に誤って荷箱を傾動させても感知装置がバイパ
ス切換弁を切換え、荷箱の傾動が停止するので、荷箱の
前壁がクレーンのブームに当たることなく、前壁やブー
ムが損傷することはない。(G) Effects of the present invention As described above, the present invention provides a bypass switching valve for bypassing the hydraulic oil from the hydraulic pump to the oil tank in the hydraulic circuit, and the packing box tilts on the lower surface of the crane boom, and the A sensing device that detects when the front wall comes into contact with the crane boom and switches the bypass switching valve is provided, so even if the crane is accidentally tilted when the crane is retracted, the sensing device switches the bypass switching valve, , The front wall of the cargo box does not hit the boom of the crane, and the front wall and the boom are not damaged.
第１図は本考案の安全装置を装備したクレーン付ダンプ
車の側面図、第２図は第１図のＡ矢視図、第３図は第２
図のＢ−Ｂ断面図、第４図油圧回路図と電気回路図であ
る。 （１）は荷箱、（２）は車体、（４）はクレーン、
（５）はブーム、（７）は感知装置、（12）は前壁、
（17）は油圧ポンプ、（19）は油圧シリンダ、（23）は
バイパス切換弁である。FIG. 1 is a side view of a dump truck equipped with a crane equipped with the safety device of the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, and FIG.
FIG. 4 is a sectional view taken along the line BB of FIG. (1) packing box, (2) car body, (4) crane,
(5) is a boom, (7) is a sensing device, (12) is a front wall,
(17) is a hydraulic pump, (19) is a hydraulic cylinder, and (23) is a bypass switching valve.
Claims (1)
圧シリンダ内に流入させ、この油圧シリンダの伸長作動
により傾動する荷箱を車体上に搭載し、前記荷箱の前方
の車体上にはブームを後方の荷箱上に格納するクレーン
を搭載してなるクレーン付ダンプ車において、前記油圧
回路中に油圧ポンプからの作動油をオイルタンクにバイ
パスさせるバイパス切換弁を設け、荷箱の前壁に対応す
るクレーンのブームの下面には、荷箱が傾動して荷箱の
前壁が前記クレーンのブームに当接したことを感知し、
前記バイパス切換弁を切換える感知装置を設けてなるク
レーン付ダンプ車における安全装置。The hydraulic oil from a hydraulic pump is caused to flow into a hydraulic cylinder in a hydraulic circuit, and a packing box which is tilted by an extension operation of the hydraulic cylinder is mounted on a vehicle body, and is mounted on a vehicle body in front of the packing box. In a dump truck equipped with a crane for storing a boom on a rear packing box, a bypass switching valve for bypassing hydraulic oil from a hydraulic pump to an oil tank is provided in the hydraulic circuit, and a bypass switching valve is provided in front of the packing box. On the underside of the crane's boom corresponding to the wall, the packing box is tilted and senses that the front wall of the packing box has contacted the crane's boom,
A safety device for a dump truck with a crane provided with a sensing device for switching the bypass switching valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990074728U JP2525922Y2 (en) | 1990-07-12 | 1990-07-12 | Safety device for dump truck with crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990074728U JP2525922Y2 (en) | 1990-07-12 | 1990-07-12 | Safety device for dump truck with crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0431632U JPH0431632U (en) | 1992-03-13 |
| JP2525922Y2 true JP2525922Y2 (en) | 1997-02-12 |
Family
ID=31614675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990074728U Expired - Lifetime JP2525922Y2 (en) | 1990-07-12 | 1990-07-12 | Safety device for dump truck with crane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2525922Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5642479B2 (en) * | 2010-09-29 | 2014-12-17 | 新明和工業株式会社 | Loading platform lifting device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5952963B2 (en) * | 1979-08-09 | 1984-12-22 | 理化学研究所 | How to measure deformation |
| JPS5932335A (en) * | 1982-08-16 | 1984-02-21 | Toshiba Corp | Rotary electric machine |
-
1990
- 1990-07-12 JP JP1990074728U patent/JP2525922Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0431632U (en) | 1992-03-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |