JPH0930653A - Continuous unloader - Google Patents

Continuous unloader

Info

Publication number
JPH0930653A
JPH0930653A JP18146595A JP18146595A JPH0930653A JP H0930653 A JPH0930653 A JP H0930653A JP 18146595 A JP18146595 A JP 18146595A JP 18146595 A JP18146595 A JP 18146595A JP H0930653 A JPH0930653 A JP H0930653A
Authority
JP
Japan
Prior art keywords
hydraulic
hydraulic motors
load
bucket conveyor
continuous unloader
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.)
Granted
Application number
JP18146595A
Other languages
Japanese (ja)
Other versions
JP3680364B2 (en
Inventor
Isao Miyazawa
勲 宮澤
Yoichi Seki
洋一 関
Seizaburo Suda
清三郎 須田
Yoshinori Yamada
義則 山田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Original Assignee
IHI Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IHI Corp filed Critical IHI Corp
Priority to JP18146595A priority Critical patent/JP3680364B2/en
Priority to EP95118709A priority patent/EP0748750B1/en
Priority to DE69508570T priority patent/DE69508570T2/en
Priority to TW084112724A priority patent/TW450934B/en
Priority to AU39175/95A priority patent/AU700375B2/en
Priority to KR1019950048543A priority patent/KR100341034B1/en
Priority to US08/572,216 priority patent/US5769206A/en
Priority to CN96103455A priority patent/CN1059173C/en
Publication of JPH0930653A publication Critical patent/JPH0930653A/en
Application granted granted Critical
Publication of JP3680364B2 publication Critical patent/JP3680364B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Ship Loading And Unloading (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a continuous unloader which can enhance the operating efficiency through operations in accordance with the heaviness of the load applied. SOLUTION: A continuous unloader concerned 1 is composed of a bucket conveyor which is circulatively driven at least in two drive positions, hydraulic motors 7a, 8a, 7b, 8b furnished at least one unit in each drive position, an oil pressure supplying means 21 to supply oil pressure as applicable to these hydraulic motors 7a... via oil path 24, and changeover means 27a, 28a which change over the oil path 24 in accordance with the heaviness of the load transported by the conveyor and decrease the number of hydraulic motors in service.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、特に、バケットコ
ンベヤを二箇所で駆動する所謂タンデム駆動方式を採用
した連続アンローダに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to a continuous unloader adopting a so-called tandem drive system for driving a bucket conveyor at two points.

【0002】[0002]

【従来の技術】本出願人は既にこの種の連続アンローダ
を提案しているが(特願平3-84120 号)、これによれば
バケットコンベヤを、エレベータ部の上部と掻取部との
二つの駆動位置で循環駆動するため、バケットコンベヤ
のチェーンにかかる張力を減小でき、チェーンの小型
化、装置の軽量化等を達成することができる。
2. Description of the Related Art The applicant of the present invention has already proposed a continuous unloader of this type (Japanese Patent Application No. 3-84120). According to this, a bucket conveyor has two parts, an upper part of an elevator part and a scraping part. Since the drive is circulated in one drive position, the tension applied to the chain of the bucket conveyor can be reduced, and the size of the chain and the weight of the device can be reduced.

【0003】[0003]

【発明が解決しようとする課題】このタンデム駆動式連
続アンローダにおいては、各駆動位置に油圧モータがそ
れぞれ設けられ、これら油圧モータに油圧ポンプから油
圧を供給し、油圧モータを同期回転させてバケットコン
ベヤを循環駆動するようになっている。
In this tandem drive type continuous unloader, hydraulic motors are respectively provided at respective drive positions, and hydraulic pressures are supplied from the hydraulic pumps to these hydraulic motors, and the hydraulic motors are synchronously rotated to drive the bucket conveyor. It is designed to be circulated.

【0004】しかし、従来の構成においては、油圧モー
タの回転速度が荷の種類によらず一定で、即ち比較的重
い鉄鋼石等の場合と、比較的軽い石炭等の場合とで同速
であったため、特に軽量な荷を搬送(荷役)する場合、
重い荷を運べるだけのトルクが余力として余ってしま
い、アンローダの能力が荷の比重差となってしまうため
軽量な荷の場合に不合理であり、最大効率での運転を行
うことができなかった。
However, in the conventional construction, the rotational speed of the hydraulic motor is constant regardless of the type of load, that is, the speed is relatively the same for relatively heavy iron ore and relatively light coal. Therefore, when transporting (loading) a particularly light load,
It was unreasonable for a light load because the torque that can carry a heavy load was left as surplus power, and the capacity of the unloader became the specific gravity difference of the load, and it was not possible to operate at maximum efficiency. .

【0005】そこで、本発明は上記課題を解決すべく創
案されたものであり、その目的は、荷の重・軽量に応じ
た運転を行なって、運転効率の向上を図り得る連続アン
ローダを提供することにある。
Therefore, the present invention was devised to solve the above-mentioned problems, and an object thereof is to provide a continuous unloader capable of improving operation efficiency by performing operation depending on the weight and weight of a load. Especially.

【0006】[0006]

【課題を解決するための手段】上記目的を達成するた
め、本発明に係る連続アンローダは、少なくとも二つの
駆動位置で循環駆動されるバケットコンベヤと、それぞ
れの上記駆動位置に1台以上設けられる油圧モータと、
これら油圧モータに油圧経路を介して適宜油圧を供給す
る油圧供給手段と、上記バケットコンベヤにより搬送さ
れる荷の重・軽量に応じて上記油圧経路を切り換えて、
油圧を供給する上記油圧モータの台数を削減する切換手
段とを備えたものである。
In order to achieve the above object, a continuous unloader according to the present invention is provided with a bucket conveyor which is cyclically driven at at least two drive positions, and at least one hydraulic pressure is provided at each of the drive positions. A motor,
Switching the hydraulic path according to the weight and light weight of the load carried by the bucket conveyor, and a hydraulic pressure supply means for appropriately supplying hydraulic pressure to these hydraulic motors via a hydraulic path,
And a switching means for reducing the number of hydraulic motors for supplying hydraulic pressure.

【0007】上記構成においては、切換手段によって油
圧モータの台数が削減されると、油圧を供給する油圧モ
ータへの送油流量を増加でき、それら油圧モータの回転
速度を高めることができる。
In the above structure, when the number of hydraulic motors is reduced by the switching means, the oil supply flow rate to the hydraulic motors for supplying hydraulic pressure can be increased and the rotational speeds of these hydraulic motors can be increased.

【0008】[0008]

【発明の実施の形態】以下本発明の好適な実施の形態を
添付図面に基づいて詳述する。
Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

【0009】図2は、本発明に係る連続アンローダの全
体を示している。連続アンローダ1は、埠頭(図示せ
ず)に設けられたブーム(図示せず)の先端部に取り付
けられ、下端部に位置する掻取部2を船倉(図示せず)
内に突入させて、バケットコンベヤ3のバケット4にて
船倉内の荷、特にバラ物としての鉄鋼石や石炭等を掻き
取るようになっている。バケット4内に掻き取られた荷
は、バケットコンベヤ3の矢示方向の循環移動によりエ
レベータ部5を上昇して、図示しないテーブルフィーダ
及びコンベヤ等を介して地上に搬送される。
FIG. 2 shows the entire continuous unloader according to the present invention. The continuous unloader 1 is attached to the tip of a boom (not shown) provided on a wharf (not shown), and has a scraping section 2 located at the lower end of the boom (not shown).
It is adapted to be rushed into the interior and scraped by the bucket 4 of the bucket conveyor 3 a load in the hold, particularly iron ore or coal as loose material. The load scraped into the bucket 4 rises in the elevator section 5 by the circulating movement of the bucket conveyor 3 in the direction of the arrow, and is conveyed to the ground via a table feeder, a conveyor, and the like (not shown).

【0010】バケットコンベヤ3は、互いに離間された
一対のエンドレスなチェーン6と、これらチェーン6同
士をチェーン長手方向等間隔で連結する複数のバケット
4(一つのみ図示)とから構成される。掻取部2は、上
下方向に延出するエレベータ部5の下端部に水平方向に
延出して形成される。エレベータ部5の上端位置と下端
位置とはそれぞれ、バケットコンベヤ3を駆動するため
の上部駆動位置a及び下部駆動位置bとされ、これら駆
動位置a,bにそれぞれ、バケットコンベヤ3を実質的
に駆動する油圧モータ7a,8a,7b,8bが設けら
れる。
The bucket conveyor 3 comprises a pair of endless chains 6 separated from each other, and a plurality of buckets 4 (only one is shown) connecting the chains 6 at equal intervals in the chain longitudinal direction. The scraping unit 2 is formed by horizontally extending at the lower end of the elevator unit 5 extending vertically. The upper end position and the lower end position of the elevator unit 5 are respectively an upper drive position a and a lower drive position b for driving the bucket conveyor 3, and the bucket conveyor 3 is substantially driven at these drive positions a and b, respectively. Hydraulic motors 7a, 8a, 7b, 8b are provided.

【0011】上部駆動位置aにおいては、2台の上部油
圧モータ7a,8aが対向配置されており、それらの駆
動軸17a,17bに,ドラム部材9が一体的且つ同軸
に結合されている。これによって各油圧モータ7a,8
aは、一軸的に連結されて等速で運転される。ドラム部
材9の両端には上部スプロケット10a,11aが一体
的に設けられ、これらスプロケット10a,11aに各
チェーン6の上端が巻回されて、バケットコンベヤ3は
上部油圧モータ7a,8aによって駆動されるようにな
る。
At the upper drive position a, two upper hydraulic motors 7a and 8a are arranged opposite to each other, and a drum member 9 is integrally and coaxially coupled to their drive shafts 17a and 17b. As a result, each hydraulic motor 7a, 8
A is uniaxially connected and is operated at a constant speed. Upper sprockets 10a and 11a are integrally provided at both ends of the drum member 9. The upper ends of the chains 6 are wound around the sprockets 10a and 11a, and the bucket conveyor 3 is driven by the upper hydraulic motors 7a and 8a. Like

【0012】下部駆動位置bにおいても、2台の下部油
圧モータ7b,8bが対向配置されており、これら油圧
モータ7b,8bの駆動軸17b,18bに、下部スプ
ロケット10b,11bがそれぞれ取り付けられてい
る。これら下部スプロケット10b,11bは、上部ス
プロケット10a,11aのエレベータ部延出方向真下
に配置される。下部スプロケット10b,11bには各
チェーン6が巻回され、バケットコンベヤ3は下部油圧
モータ7b,8bによっても駆動される。特にここで
は、各油圧モータ7b,8bの駆動軸17b,18bが
連結されず、各油圧モータ7b,8bは単独且つ等速
で、上部油圧モータ7a,8aと同期して運転される。
Also in the lower drive position b, the two lower hydraulic motors 7b and 8b are opposed to each other, and the lower sprockets 10b and 11b are attached to the drive shafts 17b and 18b of the hydraulic motors 7b and 8b, respectively. There is. The lower sprockets 10b and 11b are arranged directly below the elevator parts extending direction of the upper sprockets 10a and 11a. Each chain 6 is wound around the lower sprockets 10b and 11b, and the bucket conveyor 3 is also driven by the lower hydraulic motors 7b and 8b. In particular, here, the drive shafts 17b and 18b of the hydraulic motors 7b and 8b are not connected, and the hydraulic motors 7b and 8b are operated independently and at a constant speed in synchronization with the upper hydraulic motors 7a and 8a.

【0013】バケットコンベヤ3の各チェーン6は上記
各スプロケット10a…の他、エレベータ部5の上端側
に設けられた上部アイドルスプロケット12、エレベー
タ部5と掻取部2との境に設けられた中間アイドルスプ
ロケット13、及び掻取部2の先端に設けられた下部ア
イドルスプロケット14にも巻回されて案内される。こ
れらアイドルスプロケット12…は、チェーン6の循環
移動に伴い従動回転するようになっている。特に、下部
アイドルスプロケット14と下部スプロケット10b,
11bとを結ぶバケットコンベヤ3の下辺部15は、実
質的な荷の掻き取り部分を形成すると共に、エレベータ
部5に位置するバケットコンベヤ3の上昇部16に対し
直角方向に延出される。こうしてバケットコンベヤ3
は、以上述べた各スプロケット間を矢示方向に循環移動
する。
Each chain 6 of the bucket conveyor 3 has, in addition to the above-mentioned sprockets 10a ..., an upper idle sprocket 12 provided on the upper end side of the elevator section 5, and an intermediate section provided at the boundary between the elevator section 5 and the scraping section 2. The idle sprocket 13 and the lower idle sprocket 14 provided at the tip of the scraping unit 2 are also wound and guided. These idle sprockets 12 are driven to rotate as the chain 6 circulates. In particular, the lower idle sprocket 14 and the lower sprocket 10b,
A lower side portion 15 of the bucket conveyor 3 connecting with 11b forms a substantial scraping portion of a load and extends in a direction perpendicular to a rising portion 16 of the bucket conveyor 3 located in the elevator portion 5. Thus bucket conveyor 3
Circulates between the sprockets described above in the direction of the arrow.

【0014】また、図示省略するが、かかる連続アンロ
ーダ1には、下部アイドルスプロケット14を下部スプ
ロケット10b,11bに対し近接離間移動させる伸縮
ジャッキや、これに伴ってチェーン6長を吸収すべく中
間アイドルスプロケット13を移動するジャッキ、さら
には下辺部15を上昇部16に対し傾動動作させる傾動
ジャッキが備えられていて、掻取部2或いは下辺部15
の姿勢(位置、大きさ等)を、実際の掻取状況に応じて
適宜変更できるようになっている。
Although not shown in the drawings, the continuous unloader 1 has a telescopic jack for moving the lower idle sprocket 14 toward and away from the lower sprockets 10b, 11b, and an intermediate idle for absorbing the chain 6 length. A jack for moving the sprocket 13 and a tilting jack for tilting the lower side part 15 with respect to the rising part 16 are provided, and the scraping part 2 or the lower side part 15 is provided.
The posture (position, size, etc.) can be appropriately changed according to the actual scraping situation.

【0015】加えて、上部駆動位置aにおいて、一方の
上部油圧モータ7aの駆動軸17aには、アンローダ1
の運転停止時にバケットコンベヤ3を制動或いは停止す
るためのブレーキ機構18が設けられている。ブレーキ
機構18は本形態ではディスクブレーキ機構であり、具
体的には駆動軸17aに取り付けられるディスク19
と、図示しないフレームに固定されるキャリパ機構20
とから主に構成される。キャリパ機構20にはブレーキ
パッドが内蔵されており、このブレーキパッドは、アン
ローダ1の停止と同時に機械的に作動されてディスク1
9を自動的に把持し、これによってドラム部材9を制動
して、バケットコンベヤ3の移動を規制するようになっ
ている。従って、アンローダ1が停止すれば、バケット
コンベヤ3はバケット4に荷を積んだままそのときの位
置に保持される。
In addition, at the upper drive position a, the unloader 1 is attached to the drive shaft 17a of one upper hydraulic motor 7a.
A brake mechanism 18 is provided for braking or stopping the bucket conveyor 3 when the operation is stopped. The brake mechanism 18 is a disc brake mechanism in this embodiment, and specifically, a disc 19 attached to the drive shaft 17a.
And a caliper mechanism 20 fixed to a frame (not shown)
Mainly consists of and. The caliper mechanism 20 has a built-in brake pad, and this brake pad is mechanically operated at the same time when the unloader 1 is stopped, so that the disc 1
9 is automatically gripped, the drum member 9 is braked by this, and the movement of the bucket conveyor 3 is regulated. Therefore, when the unloader 1 is stopped, the bucket conveyor 3 is held at the current position with the bucket 4 loaded.

【0016】さて、このアンローダ1においては、各油
圧モータ7a…に適宜油圧を供給するための油圧供給部
(油圧供給手段)21が設けられている。そして油圧供
給部21と各油圧モータ7a…とは油圧経路24で接続
されている。以下、これらの詳細を説明する。
The unloader 1 is provided with a hydraulic pressure supply section (hydraulic pressure supply means) 21 for appropriately supplying hydraulic pressure to the hydraulic motors 7a. The hydraulic pressure supply unit 21 and each hydraulic motor 7a ... Are connected by a hydraulic pressure path 24. Hereinafter, these details will be described.

【0017】図1は、かかるアンローダ1の油圧回路図
で、これには油圧供給部21、油圧経路24及び油圧モ
ータ7a…が含まれている。図中、上方には上部油圧モ
ータ7a,8aが、下方には下部油圧モータ7b,8b
がそれぞれ示され、また本図は、鉄鋼石等の比較的重い
荷を扱うときの状態を示している。また両方の上部油圧
モータ7a,8aは、略示したドラム部材9によって一
軸的に連結されている。
FIG. 1 is a hydraulic circuit diagram of such an unloader 1, which includes a hydraulic pressure supply unit 21, a hydraulic pressure path 24, and a hydraulic motor 7a. In the figure, upper hydraulic motors 7a and 8a are shown in the upper part, and lower hydraulic motors 7b and 8b are shown in the lower part.
Are shown respectively, and this figure shows the state when handling a relatively heavy load such as steel or stone. Both upper hydraulic motors 7a and 8a are uniaxially connected by a drum member 9 which is schematically shown.

【0018】油圧供給部21は、電気モータ22と、電
気モータ22に直結される油圧ポンプ23とを有する。
電気モータ22は、荷或いは負荷状態によらず一定速度
で運転され、油圧ポンプ23の軸を一定速度で回転させ
る。一方、油圧ポンプ23は可変吐出形のもの、特にこ
こでは斜板式のものが採用され、即ちこれは、電気モー
タ22と直結する前記軸に板を傾斜して取り付け、この
板の回転によりピストンを往復動させて作動油を圧送す
る仕組みとなっている。この油圧ポンプ23は、図示し
ないコントローラにより板の傾斜角制御が行われ、これ
により圧送油流量を変化することができる。
The hydraulic pressure supply unit 21 has an electric motor 22 and a hydraulic pump 23 directly connected to the electric motor 22.
The electric motor 22 is operated at a constant speed regardless of the load or load state, and rotates the shaft of the hydraulic pump 23 at a constant speed. On the other hand, the hydraulic pump 23 is of a variable discharge type, particularly a swash plate type is adopted here, that is, the plate is inclinedly attached to the shaft directly connected to the electric motor 22, and the piston is rotated by the rotation of the plate. It has a mechanism to reciprocate to pump hydraulic oil. In this hydraulic pump 23, the inclination angle of the plate is controlled by a controller (not shown), so that the pressure-feed oil flow rate can be changed.

【0019】油圧ポンプ23にて高圧とされた作動油
は、その吐出側に接続された高圧経路25へと送出さ
れ、高圧経路25の途中に設けられた分岐26を分岐し
て、それぞれの下部油圧モータ7b,8bには経路25
aを通じて直接に供給される。一方、分岐26の上部油
圧モータ7a,8a側にはさらに分岐26aが設けら
れ、この分岐26aと上部油圧モータ7a,8aとの間
に、油圧経路24の切換えにより各上部油圧モータ7
a,8aへの油圧供給を選択的に中止するための切換部
(切換手段)27a,28aが設けられる。これら切換
部27a,28aは、それぞれの上部油圧モータ7a,
8aに対し設けられ、且つ同様の構成がなされているた
め、ここでは一方(切換部27a)のみについて説明
し、他方については同一符号を付して説明を省略する。
The hydraulic oil having a high pressure by the hydraulic pump 23 is delivered to a high pressure path 25 connected to the discharge side of the hydraulic pump 23, and a branch 26 provided in the middle of the high pressure path 25 is branched to a lower portion of each. The path 25 is connected to the hydraulic motors 7b and 8b.
directly through a. On the other hand, a branch 26a is further provided on the side of the upper hydraulic motor 7a, 8a of the branch 26, and by switching the hydraulic path 24 between the branch 26a and the upper hydraulic motor 7a, 8a, each upper hydraulic motor 7
Switching parts (switching means) 27a, 28a for selectively stopping the hydraulic pressure supply to a, 8a are provided. These switching portions 27a and 28a are respectively connected to the upper hydraulic motors 7a and 7a.
Since it is provided for 8a and has the same configuration, only one (switching unit 27a) will be described here, and the other will be denoted by the same reference numerals and description thereof will be omitted.

【0020】分岐26aと上部油圧モータ7aとは分岐
経路29にて接続され、この分岐経路29には第1切換
弁30が介設される。第1切換弁30の後流側にはさら
に分岐31が設けられ、この分岐31と、他方の上部油
圧モータ8aの出口側低圧経路32とは循環用低圧経路
33にて接続される。そしてこの循環用低圧経路33の
途中に第2切換弁34が設けられる。
The branch 26a and the upper hydraulic motor 7a are connected by a branch path 29, and a first switching valve 30 is provided in the branch path 29. A branch 31 is further provided on the downstream side of the first switching valve 30, and the branch 31 and the outlet side low pressure path 32 of the other upper hydraulic motor 8a are connected by a circulation low pressure path 33. A second switching valve 34 is provided in the middle of the low pressure circulation path 33.

【0021】これら第1及び第2切換弁30,34はい
わゆるロジック弁で、即ちこれらは、各制御用高圧経路
35,36から選択的に高圧が導入されて開閉するよう
になっている。分岐26及び26a間の高圧経路25か
ら導入用経路37に導入された高圧は、弁38を通過し
て制御用切換弁39に送られる。制御用切換弁39から
はその高圧が、第1切換弁30或いは第2切換弁34の
いずれか一方に導入され、その高圧が導入された方の弁
は閉となり、されない方の弁は開となる。図示の状態に
あっては、第1切換弁30が開、第2切換弁34が閉と
なっていて、結局、上部油圧モータ7aには高圧が供給
されてそのモータ7aは回転駆動されている。
The first and second switching valves 30 and 34 are so-called logic valves, that is, they are opened and closed by selectively introducing high pressure from the high pressure paths 35 and 36 for control. The high pressure introduced from the high pressure passage 25 between the branches 26 and 26a into the introduction passage 37 passes through the valve 38 and is sent to the control switching valve 39. The high pressure is introduced from the control switching valve 39 to either the first switching valve 30 or the second switching valve 34, the valve to which the high pressure is introduced is closed, and the valve to which the high pressure is not opened is opened. Become. In the illustrated state, the first switching valve 30 is open and the second switching valve 34 is closed, so that high pressure is supplied to the upper hydraulic motor 7a and the motor 7a is rotationally driven. .

【0022】なお、これら第1及び第2切換弁30,3
4は、理解を容易化するため図示の記号を用いたが、こ
れらは図5に示す切換弁と等価で、この記号によっても
表すことができる。
Incidentally, these first and second switching valves 30, 3
Although symbols 4 are used for facilitating understanding, they are equivalent to the switching valve shown in FIG. 5 and can be represented by these symbols.

【0023】同様に、他方の切換部28aにおいても、
第1切換弁30が開、第2切換弁34が閉となってお
り、他方の上部油圧モータ8aにも高圧が供給されて、
結局両方の上部油圧モータ7a,8aは回転駆動されて
いる。そして、下部油圧モータ7b,8bも駆動されて
いることから、鉄鋼石等の比較的重い荷を扱う場合は、
四台全ての油圧モータ7a…を用いて運転を行ってい
る。
Similarly, in the other switching section 28a as well,
Since the first switching valve 30 is open and the second switching valve 34 is closed, high pressure is supplied to the other upper hydraulic motor 8a,
After all, both upper hydraulic motors 7a and 8a are rotationally driven. Since the lower hydraulic motors 7b and 8b are also driven, when handling a relatively heavy load such as steel stone,
The operation is performed using all the four hydraulic motors 7a.

【0024】また、各油圧モータ7a…の駆動に供され
て低圧となった作動油は、下部油圧モータ7b,8bに
ついては経路25b、低圧経路40を通じて油圧ポンプ
23に戻される。一方、上部油圧モータ7a,8aにつ
いても、前述の出口側低圧経路32及び低圧経路40を
通じて油圧ポンプ23に戻されるが、ここで出口側低圧
経路32の低圧油は、循環用低圧経路33に侵入するも
のの第2切換弁34で遮断される。また、その低圧油
は、制御用低圧経路41にも侵入するが弁38で遮断さ
れる。なお、第1及び第2切換弁30,34が開となる
ときにリークする作動油は、リーク経路42を通じてタ
ンク43に戻される。
Further, the hydraulic oil that has been driven to drive the respective hydraulic motors 7a ... And has a low pressure is returned to the hydraulic pump 23 through the path 25b and the low pressure path 40 for the lower hydraulic motors 7b and 8b. On the other hand, the upper hydraulic motors 7a and 8a are also returned to the hydraulic pump 23 through the outlet side low pressure passage 32 and the low pressure passage 40 described above, but the low pressure oil in the outlet side low pressure passage 32 enters the circulation low pressure passage 33 here. However, it is shut off by the second switching valve 34. The low-pressure oil also enters the control low-pressure passage 41, but is shut off by the valve 38. The hydraulic oil that leaks when the first and second switching valves 30 and 34 are opened is returned to the tank 43 through the leak path 42.

【0025】加えて、油圧供給部21には、油圧ポンプ
23や油圧モータ7a…等からリークする作動油を補給
すべく、或いは油温を所定範囲に保つべく補給用油圧ポ
ンプ44が設けられる。この補給用油圧ポンプ44は定
吐出形のもので、前記同様に電気モータ45により駆動
される。補給用油圧ポンプ44はタンク43から作動油
を吸い上げ、補給用経路46を通じて低圧経路40へと
作動油を供給する。なお47は逆止弁で、メインの油圧
ポンプ23の停止時には高圧経路25への補給も可能で
ある。また48はリリーフ弁で、これにより補給油圧は
所定値以内に保たれる。そして49は、メンテナンス等
のためのバイパス弁、及び長期停止時等のための遮断弁
等を有する補助機能部を示す。
In addition, the hydraulic pressure supply unit 21 is provided with a hydraulic pump 44 for replenishment in order to replenish the hydraulic oil leaking from the hydraulic pump 23, the hydraulic motors 7a, etc., or to keep the oil temperature within a predetermined range. The replenishing hydraulic pump 44 is of a constant discharge type and is driven by the electric motor 45 as described above. The replenishment hydraulic pump 44 sucks hydraulic oil from the tank 43 and supplies the hydraulic oil to the low-pressure passage 40 through the replenishment passage 46. Reference numeral 47 is a check valve, which can replenish the high-pressure path 25 when the main hydraulic pump 23 is stopped. Reference numeral 48 is a relief valve, which keeps the supply hydraulic pressure within a predetermined value. Reference numeral 49 denotes an auxiliary function unit having a bypass valve for maintenance and the like, and a shutoff valve for long-term stop and the like.

【0026】この構成にあっては、油圧ポンプ23から
の吐出量乃至吐出流量を変化させることで、油圧モータ
7a…の運転乃至回転速度を変え、荷の搬送速度を変え
ることができる。また鉄鋼石等の比較的重い荷を扱う場
合、四台全ての油圧モータ7a…を駆動して最大の駆動
力乃至運転トルクを得られるようにしている。そして通
常は、油圧ポンプ23が最大吐出量付近で最大効率とな
ること、搬送効率が搬送速度に比例すること等から、最
大速度にて、且つ最大トルクを発生させて運転を行うこ
とが多い。
In this configuration, by changing the discharge amount or discharge flow rate from the hydraulic pump 23, the operation or rotation speed of the hydraulic motors 7a ... Can be changed and the load carrying speed can be changed. Further, when handling a relatively heavy load such as iron and steel, all four hydraulic motors 7a ... Are driven to obtain the maximum driving force or operating torque. Usually, the hydraulic pump 23 has the maximum efficiency in the vicinity of the maximum discharge amount, and the transfer efficiency is proportional to the transfer speed. Therefore, the hydraulic pump 23 is often operated at the maximum speed and with the maximum torque.

【0027】ところが、この速度、トルクともに最大の
運転状態で、例えば石炭等の比較的軽い荷(石炭の比重
は鉄鋼石に比べ1/3 程度)を扱うと、同じ搬送速度で容
積的には同一な搬送を行っていても、荷が軽量なためト
ルクには余力が残っており、運転能力を最大に発揮しき
れていない。従って、かかるアンローダ1には、その余
力分を有効活用して運転効率を高める工夫がなされてい
る。
However, when a relatively light load such as coal (the specific gravity of coal is about 1/3 that of iron ore) is handled under the maximum operating conditions of both speed and torque, the volume is the same at the same conveying speed. Even if they are transported in the same way, the load is light, so there is still a surplus of torque remaining, and the operating capacity has not been maximized. Therefore, the unloader 1 is devised so as to effectively utilize the remaining capacity to improve the operation efficiency.

【0028】図3は、図1と同様の油圧回路図であっ
て、比較的軽い荷を扱うときの状態を示し、図示するよ
うに、これにあっては、図中右側の切換部28aにおい
て制御用切換弁39が切換えられ、これにより、第1切
換弁30が閉、第2切換弁34が開となっている。こう
なると、油圧モータ8aへは高圧供給がなされず、油圧
モータ8aは駆動されず実質上停止される。そして、反
対側の上部油圧モータ7aから吐出された低圧油は、循
環用低圧経路33、第2切換弁34、分岐31と油圧モ
ータ8aとを結ぶ分岐経路29、油圧モータ8aを経由
して出口側低圧経路32へと送られる。このように低圧
油は、それら経路によるループを循環して、油圧モータ
7aから逆駆動される油圧モータ8aの回転を許容す
る。
FIG. 3 is a hydraulic circuit diagram similar to that of FIG. 1, showing a state in which a relatively light load is handled, and as shown in the figure, in this case, in the switching portion 28a on the right side in the figure. The control switching valve 39 is switched, whereby the first switching valve 30 is closed and the second switching valve 34 is open. In this case, high pressure is not supplied to the hydraulic motor 8a, and the hydraulic motor 8a is not driven and is substantially stopped. The low-pressure oil discharged from the upper hydraulic motor 7a on the opposite side is discharged through the low-pressure passage 33 for circulation, the second switching valve 34, the branch passage 29 connecting the branch 31 and the hydraulic motor 8a, and the hydraulic motor 8a. It is sent to the side low-pressure path 32. In this way, the low-pressure oil circulates through the loop formed by these paths, and allows the hydraulic motor 8a that is reversely driven by the hydraulic motor 7a to rotate.

【0029】このような切換えがなされると、油圧ポン
プ23からの吐出量が、前述の四台の油圧モータ7a…
に対し三台の油圧モータ7a,7b,8bにしか分散さ
れないため、これら各油圧モータ7a,7b,8bへの
供給流量を増加して回転速度を高めることができる。こ
こで各油圧モータ7a…の発生トルクは同一であり、よ
って全体としての発生トルクは減小することとなるが、
こうなっても荷が軽いために問題はなく、十分な搬送乃
至荷役を実行することができる。従って、荷が軽い場合
は、油圧を供給する或いは運転する油圧モータの台数を
削減して、発生トルクを減小させた分、最大運転速度を
高めることができる。そしてこれにより、運転効率の向
上をも図ることができる。
When such switching is performed, the discharge amount from the hydraulic pump 23 is changed to the above-mentioned four hydraulic motors 7a ...
On the other hand, since it is distributed only to the three hydraulic motors 7a, 7b, 8b, the flow rate supplied to each of the hydraulic motors 7a, 7b, 8b can be increased to increase the rotation speed. Here, the generated torques of the respective hydraulic motors 7a ... Are the same, so that the generated torque as a whole is reduced.
Even in such a case, since the load is light, there is no problem, and it is possible to sufficiently carry or carry the cargo. Therefore, when the load is light, the maximum operating speed can be increased by reducing the generated torque by reducing the number of hydraulic motors that supply or operate hydraulic pressure. As a result, it is possible to improve the operation efficiency.

【0030】また図4は、軽い荷を扱うときの別の状態
を示し、これにおいては前記で停止されていた油圧モー
タ8aが運転され、その反対側の油圧モータ7aが実質
上停止されている。即ち、ここでは互いの切換部27
a,28aにおいて、制御用切換弁39、第1切換弁3
0及び第2切換弁34が全て逆に切り換えられている。
FIG. 4 shows another state when handling a light load, in which the hydraulic motor 8a which has been stopped in the above is operated and the hydraulic motor 7a on the opposite side is substantially stopped. . That is, here, the switching unit 27 of each other
a and 28a, the control switching valve 39 and the first switching valve 3
0 and the second switching valve 34 are all switched in reverse.

【0031】こうなった場合でも、一方の上部油圧モー
タ8aしか駆動されないため前記同様の効果を奏する。
そして、これら上部油圧モータ7a,8aを、所定の運
転時間或いは日数毎に交互に切り換えることで、一方の
みの使用による低寿命化を防止でき、耐久性も高められ
る。
Even in such a case, since only one upper hydraulic motor 8a is driven, the same effect as described above can be obtained.
By alternately switching the upper hydraulic motors 7a and 8a for every predetermined operating time or number of days, it is possible to prevent the shortening of the service life due to the use of only one of them and to enhance the durability.

【0032】このように、かかるアンローダは、複数の
油圧モータのうち幾つかを実質上停止させて運転速度の
向上を図るものであるから、上記形態の他にも様々な回
路構成、油圧モータの配置、切換弁の変更等が可能であ
り、上記形態は本発明を限定するものではない。
As described above, the unloader is intended to improve the operating speed by substantially stopping some of the plurality of hydraulic motors. Therefore, various circuit configurations and hydraulic motor Arrangement, change of the switching valve, etc. are possible, and the above embodiment does not limit the present invention.

【0033】[0033]

【発明の効果】本発明は次の如き優れた効果を発揮す
る。
The present invention exhibits the following excellent effects.

【0034】(1) 荷の重・軽量に応じて運転速度を
変化させ、運転効率の向上を図れる。
(1) It is possible to improve the operation efficiency by changing the operation speed according to the weight and lightness of the load.

【図面の簡単な説明】[Brief description of drawings]

【図1】形態に係る連続アンローダの油圧回路図で、比
較的重い荷を扱うときの状態を示す。
FIG. 1 is a hydraulic circuit diagram of a continuous unloader according to an embodiment, showing a state when handling a relatively heavy load.

【図2】形態に係る連続アンローダの全体斜視図であ
る。
FIG. 2 is an overall perspective view of the continuous unloader according to the embodiment.

【図3】形態に係る連続アンローダの油圧回路図で、比
較的軽い荷を扱うときの状態を示す。
FIG. 3 is a hydraulic circuit diagram of the continuous unloader according to the embodiment, showing a state when handling a relatively light load.

【図4】形態に係る連続アンローダの油圧回路図で、比
較的軽い荷を扱うときの別の状態を示す。
FIG. 4 is a hydraulic circuit diagram of the continuous unloader according to the embodiment, showing another state when handling a relatively light load.

【図5】第1及び第2切換弁を示す別の記号である。FIG. 5 is another symbol showing the first and second switching valves.

【符号の説明】[Explanation of symbols]

1 連続アンローダ 3 バケットコンベヤ 7a,8a 上部油圧モータ(油圧モータ) 7b,8b 下部油圧モータ(油圧モータ) 21 油圧供給部(油圧供給手段) 27a,28a 切換部(切換手段) a 上部駆動位置(駆動位置) b 下部駆動位置(駆動位置) 1 Continuous Unloader 3 Bucket Conveyor 7a, 8a Upper Hydraulic Motor (Hydraulic Motor) 7b, 8b Lower Hydraulic Motor (Hydraulic Motor) 21 Hydraulic Supply Unit (Hydraulic Supply Means) 27a, 28a Switching Unit (Switching Means) a Upper Driving Position (Drive) Position) b Lower drive position (drive position)

フロントページの続き (72)発明者 山田 義則 愛知県名古屋市港区昭和町13番地 石川島 播磨重工業株式会社名古屋工場内Front page continued (72) Inventor Yoshinori Yamada 13 Showa-cho, Minato-ku, Nagoya-shi, Aichi Ishikawajima Harima Heavy Industries Co., Ltd.Nagoya factory

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 少なくとも二つの駆動位置で循環駆動さ
れるバケットコンベヤと、それぞれの上記駆動位置に1
台以上設けられる油圧モータと、該油圧モータに油圧経
路を介して適宜油圧を供給する油圧供給手段と、上記バ
ケットコンベヤにより搬送される荷の重・軽量に応じて
上記油圧経路を切り換えて、油圧を供給する上記油圧モ
ータの台数を削減する切換手段とを備えたことを特徴と
する連続アンローダ。
1. A bucket conveyor circulatingly driven in at least two drive positions, and one in each of the drive positions.
A hydraulic motor provided on a table or more, a hydraulic supply means for supplying an appropriate hydraulic pressure to the hydraulic motor via a hydraulic path, and the hydraulic path is switched depending on the weight or weight of the load conveyed by the bucket conveyor. And a switching means for reducing the number of the hydraulic motors for supplying the continuous unloader.
JP18146595A 1995-06-16 1995-07-18 Continuous unloader Expired - Lifetime JP3680364B2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP18146595A JP3680364B2 (en) 1995-07-18 1995-07-18 Continuous unloader
EP95118709A EP0748750B1 (en) 1995-06-16 1995-11-28 Continuous unloader
DE69508570T DE69508570T2 (en) 1995-06-16 1995-11-28 Continuous discharge device
TW084112724A TW450934B (en) 1995-06-16 1995-11-29 Continuous unloader
AU39175/95A AU700375B2 (en) 1995-06-16 1995-11-30 Continuous unloader
KR1019950048543A KR100341034B1 (en) 1995-06-16 1995-12-12 Continuous Unloader
US08/572,216 US5769206A (en) 1995-06-16 1995-12-13 Continuous unloader
CN96103455A CN1059173C (en) 1995-06-16 1996-02-16 Continuous unloader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18146595A JP3680364B2 (en) 1995-07-18 1995-07-18 Continuous unloader

Publications (2)

Publication Number Publication Date
JPH0930653A true JPH0930653A (en) 1997-02-04
JP3680364B2 JP3680364B2 (en) 2005-08-10

Family

ID=16101234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18146595A Expired - Lifetime JP3680364B2 (en) 1995-06-16 1995-07-18 Continuous unloader

Country Status (1)

Country Link
JP (1) JP3680364B2 (en)

Also Published As

Publication number Publication date
JP3680364B2 (en) 2005-08-10

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