JPH0714762B2 - Device for measuring dust amount in the hopper of cleaning vehicles - Google Patents
Device for measuring dust amount in the hopper of cleaning vehiclesInfo
- Publication number
- JPH0714762B2 JPH0714762B2 JP61001313A JP131386A JPH0714762B2 JP H0714762 B2 JPH0714762 B2 JP H0714762B2 JP 61001313 A JP61001313 A JP 61001313A JP 131386 A JP131386 A JP 131386A JP H0714762 B2 JPH0714762 B2 JP H0714762B2
- Authority
- JP
- Japan
- Prior art keywords
- hopper
- dust
- ultrasonic
- amount
- air
- 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 - Fee Related
Links
Landscapes
- Refuse-Collection Vehicles (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は清掃車のホッパ内塵量測定装置に関するもの
である。TECHNICAL FIELD The present invention relates to a dust amount measuring device in a hopper of a cleaning vehicle.
塵芥を吸込んで車体上のホッパ内に集塵する吸引式の清
掃車は、ホッパ内の堆積塵量が許容高さを越えると塵芥
の吸込み能力が著しく低下するため、ホッパ内に許容高
さ近くまで塵芥が堆積したところで清掃を中止して廃棄
場に向かわなければならないが、そのためにはホッパ内
の堆積塵量を測定して許容量までの余裕集塵量を把握す
ることが必要である。A suction-type cleaning vehicle that sucks dust and collects it in the hopper on the vehicle body has a significantly reduced dust suction capability when the accumulated dust amount in the hopper exceeds the allowable height. When dust is accumulated, it is necessary to stop cleaning and head to the waste site, but for that purpose, it is necessary to measure the accumulated dust amount in the hopper and grasp the marginal dust collection amount up to the allowable amount.
そこで従来は、ホッパの重量をホッパ内の堆積塵量を把
握している。Therefore, conventionally, the weight of the hopper is used to grasp the amount of accumulated dust in the hopper.
しかしながら、上記のようにホッパの重量を測定してホ
ッパの堆積塵量を把握するのでは、ホッパ内に堆積する
塵芥の重量によって把握堆積量が左右されるために、ホ
ッパ内に泥土等の重量のある塵芥が多く堆積したとき
は、ホッパ内の堆積塵量が許容量高さ近くなる前に把握
堆積量が集塵限界を越えてしまうことになるし、またホ
ッパ内に軽い塵芥が多く堆積したときには、ホッパ内の
堆積塵量が許容高さを越えても把握堆積量は集塵限界を
越えないことがあるという問題をもっていた。また、上
記従来のホッパ内堆積塵量の把握方法では、走行中の車
体の振動がホッパ重量の測定値に影響するために、測定
値が常にふらつくことになり、そのためにホッパ内堆積
塵量の把握が難しいという問題もあった。However, if the weight of the hopper is measured and the amount of accumulated dust in the hopper is grasped as described above, the amount of dust accumulated in the hopper affects the grasped accumulation amount, and therefore the weight of mud or the like in the hopper If a large amount of dust is accumulated, the amount of accumulated dust will exceed the dust collection limit before the amount of dust accumulated in the hopper is close to the allowable height, and a large amount of light dust will accumulate in the hopper. In doing so, there was a problem that the grasped accumulated amount may not exceed the dust collection limit even if the accumulated dust amount in the hopper exceeds the allowable height. Further, in the above-mentioned conventional method for grasping the amount of accumulated dust in the hopper, the vibration of the vehicle body during traveling affects the measured value of the hopper, and the measured value always fluctuates. There was also the problem that it was difficult to grasp.
この発明は、ホッパ内に堆積する塵芥の重量や車体振動
等の影響を受けることなくホッパ内の堆積塵量をほぼ正
確に測定することができる清掃車のホッパ内塵量測定装
置を提供することを目的としたものである。The present invention provides a hopper dust amount measuring device for a cleaning vehicle, which is capable of almost accurately measuring the amount of dust accumulated in the hopper without being affected by the weight of dust accumulated in the hopper, vibration of the vehicle body, and the like. It is intended for.
この発明は、下部にゴムカーテンを有する隔壁により前
部室と後部室とに仕切られたホッパ内の少なくとも前部
室の上部に、ホッパ内の堆積塵芥に向けて超音波を発射
するとともにその反射波を受信してホッパ内の堆積塵量
を検出する超音波送受信器を設け、かつ、前記前部室の
上部に、ホッパ前壁部の塵芥吹出口から前部室上面に向
けて吹出される空気流の向きを前記超音波送受信器に直
接当らない方向に変えるガード板を設けるとともに、前
記超音波送受信器の近傍に、この送受信器の前面部に空
気を吹出す空気吹出部を設けたことを特徴とするもので
ある。This invention emits an ultrasonic wave toward the accumulated dust in the hopper and emits a reflected wave of the ultrasonic wave toward at least the upper part of the front chamber in the hopper divided into the front chamber and the rear chamber by the partition having the rubber curtain at the bottom. An ultrasonic transmitter / receiver for receiving and detecting the amount of accumulated dust in the hopper is provided, and the direction of the air flow blown from the dust outlet of the front wall of the hopper toward the upper surface of the front chamber at the upper part of the front chamber. Is provided with a guard plate for changing the direction so that it does not directly contact the ultrasonic transmitter / receiver, and in the vicinity of the ultrasonic transmitter / receiver, an air blowing portion for blowing air to the front surface of the transmitter / receiver is provided. It is a thing.
すなわち、この発明は、ホッパ内の少なくとも前部室の
上部に超音波送受信器を設けて、ホッパ内の堆積塵量を
超音波により検出するものであり、このようにホッパ内
の堆積塵量を超音波によって検出すれば、ホッパ内に堆
積する塵芥の重量や車体振動等の影響を受けることなく
ホッパ内の堆積塵量をほぼ正確に測定することができ
る。That is, the present invention provides an ultrasonic transmitter / receiver at least in the upper part of the front chamber in the hopper to detect the amount of accumulated dust in the hopper by ultrasonic waves. If detected by sound waves, the amount of dust accumulated in the hopper can be measured almost accurately without being affected by the weight of dust accumulated in the hopper, vibration of the vehicle body, and the like.
しかも、この発明においては、前記超音波送受信器の近
傍に、この送受信器の前面部に空気を吹出す空気吹出部
を設けて、超音波送受信器の前面に浮遊してくる埃を空
気によって吹払うようにしているため、超音波送受信器
の前面に埃が付着して超音波による堆積塵量検出能力が
低下するようなことはない。Moreover, in the present invention, an air blowing section for blowing air is provided on the front surface of the ultrasonic transmitter / receiver in the vicinity of the ultrasonic transmitter / receiver so that dust floating on the front surface of the ultrasonic transmitter / receiver is blown by the air. Since the cleaning is performed, dust does not adhere to the front surface of the ultrasonic transmitter / receiver and the capability of detecting the amount of accumulated dust by ultrasonic waves does not deteriorate.
さらに、この発明では、前記前部室の上部に、ホッパ前
壁部の塵芥吹出口から前部室上面に向けて吹出される空
気流の向きを前記超音波送受信器に直接当らない方向に
変えるガード板を設けているため、前記塵芥吹出口から
ホッパ内に吹出される空気流中の塵芥が超音波送受信器
にぶつかってこの超音波送受信器を損傷することがない
だけでなく、前記空気吹出部から超音波送受信器の前面
部に吹出される空気が、塵芥吹出口から吹出される空気
流の影響を受けることがほとんどないから、前記空気吹
出部からの吹出し空気があまり圧力が高くない空気であ
っても、超音波送受信器の前面に浮遊してくる埃を良好
に吹払って、超音波送受信器の前面に埃が付着するのを
防ぐことができる。Further, in the present invention, a guard plate is provided on the upper portion of the front chamber for changing the direction of the air flow blown from the dust outlet of the front wall of the hopper toward the upper surface of the front chamber so as not to directly hit the ultrasonic transceiver. Since it is provided, not only does the dust in the air flow blown into the hopper from the dust outlet not hit the ultrasonic transceiver to damage the ultrasonic transceiver, but also from the air outlet. The air blown to the front of the ultrasonic transceiver is hardly affected by the air flow blown from the dust outlet, so the air blown from the air blower is not so high in pressure. Even if the dust floating on the front surface of the ultrasonic transmitter / receiver is satisfactorily blown off, it is possible to prevent the dust from adhering to the front surface of the ultrasonic transmitter / receiver.
以下、この発明の一実施例を図面を参照して説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図〜第３図において、１は清掃車の車体、２は運転
席であり、車体１上には、車体後端部を中心として上方
にはね上げ回動されるダンプユニット３が設けられてお
り、このダンプユニット３内の後部側に、集塵塵芥を収
容するホッパ４が設けられている。1 to 3, 1 is a vehicle body of a cleaning vehicle, 2 is a driver's seat, and a dump unit 3 is provided on the vehicle body 1 so as to be flipped up and rotated around a rear end portion of the vehicle body. A hopper 4 for accommodating the collected dust is provided on the rear side of the dump unit 3.
このホッパ４は、その中央部において、ホッパ上面から
垂下された下部にゴムカーテン６を有する隔壁５によ
り、前部室4aと後部室4bとに仕切られており、さらに、
このホッパ４の底面は、後端側（塵芥排出口側）に向か
って低くなるように傾斜されている。The hopper 4 is divided into a front chamber 4a and a rear chamber 4b by a partition wall 5 having a rubber curtain 6 at a lower portion thereof hanging down from the upper surface of the hopper at the center thereof.
The bottom surface of the hopper 4 is inclined so as to decrease toward the rear end side (the dust discharge port side).
７は前記ホッパ４の上に設けられた風路であり、この風
路７の後端はホッパ４の後部室4bに連通され、その先端
側はホッパ４の前方に延長されている。８はホッパ４の
後部室4bと風路７との間に設けられた網フィルタであ
る。Reference numeral 7 denotes an air passage provided on the hopper 4. The rear end of the air passage 7 communicates with the rear chamber 4b of the hopper 4, and the front end side thereof extends in front of the hopper 4. Reference numeral 8 is a mesh filter provided between the rear chamber 4b of the hopper 4 and the air passage 7.
一方、９は前記ホッパ４の前側に位置させて車体１上に
搭載されたブロワであり、このブロワ９の吸気口9aは前
記風路７の先端部に切離し可能に連通接続され、排気口
9bはカバー３上に設けた拝風路10に切離し可能に連通接
続されている。On the other hand, 9 is a blower mounted on the vehicle body 1 by being positioned in front of the hopper 4, and an intake port 9a of the blower 9 is communicably connected to the tip of the air passage 7 so as to be separable from the exhaust port.
9b is communicatively connected to the air passage 10 provided on the cover 3 in a separable manner.
また、11は車体１下の側部に設けられた塵芥吸込部であ
る。この塵芥吸込部11は、路面Ａ上の土砂やごみ等の塵
芥ａを掃寄せるための掃寄ブラシ（図示せず）と、塵芥
吸込口12に塵芥ａを吸込ませる吸込ブラシ13とを備えた
もので、この塵芥吸込部11の塵芥吸込口12は、前記ホッ
パ４の前壁部に前部室4aの上面に向けて斜めに設けられ
ている塵芥吹出口13に塵芥吸込管14を介して接続されて
いる。Reference numeral 11 is a dust suction portion provided on the side portion below the vehicle body 1. The dust suction unit 11 includes a sweeping brush (not shown) for sweeping dust a such as dirt and dust on the road surface A, and a suction brush 13 for sucking the dust a into the dust suction port 12. The dust suction port 12 of the dust suction portion 11 is connected to a dust blow port 13 obliquely provided on the front wall of the hopper 4 toward the upper surface of the front chamber 4a through a dust suction pipe 14. Has been done.
なお、この実施例の清掃車は、前記塵芥吸込部11を車体
１の両側部に設けたものであり、したがって前記塵芥吹
出口13は第２図に示すようにホッパ前壁部の両側に設け
られている。In the cleaning vehicle of this embodiment, the dust suction portions 11 are provided on both sides of the vehicle body 1. Therefore, the dust outlets 13 are provided on both sides of the hopper front wall portion as shown in FIG. Has been.
また、ホッパ４の前部室4aの上部には、塵芥吹出口13か
ら前部室4a内に吹出される空気流中の塵芥がホッパ上面
に当ってホッパ上面を損傷するのを防ぐとともに、前記
塵芥吹出口13からの吹出し空気流を後述する超音波送受
信器17,18に直接当らない方向に変えてやるためのガー
ド板15が設けられている。このガード板15は、両側の塵
芥吹出口13,13に対向させて前部室4aの上部両側に設け
られている。The upper part of the front chamber 4a of the hopper 4 prevents dust in the air flow blown from the dust outlet 13 into the front chamber 4a from hitting the upper surface of the hopper and damaging the upper surface of the hopper. A guard plate 15 is provided for changing the air flow blown out from the outlet 13 in a direction in which it does not directly hit the ultrasonic transmitters / receivers 17, 18 described later. The guard plates 15 are provided on both upper sides of the front chamber 4a so as to face the dust outlets 13 on both sides.
この清掃車は、ブロワ９によりホッパ４内の空気を吸引
することにより路面の塵芥ａをホッパ４内に吸込み集塵
するもので、塵芥吸込部11から塵芥ａとともに吸込まれ
た空気流は、第１図および第２図に矢印で示すように塵
芥吹出口13からホッパ前部室4a内に吹出されてその上部
のガード板15に当り、ここで流速を減じて重量のある塵
芥ａを落下させるとともに、塵芥ａを落下させながらゴ
ムカーテン６の下を通ってホッパ後部室4bに入り、ここ
でほとんどの塵芥ａを落下させた後、網フィルタ８を通
って風路７内に入る。この風路７に入った空気流は、ブ
ロワ９により排風路10から排出される。This cleaning vehicle sucks the air in the hopper 4 by the blower 9 to suck the dust a on the road surface into the hopper 4 and collect the dust. The air flow sucked from the dust suction portion 11 together with the dust a is As shown by the arrows in FIGS. 1 and 2, the dust is discharged from the dust outlet 13 into the front chamber 4a of the hopper and hits the guard plate 15 at the upper part thereof, where the flow velocity is reduced to drop the heavy dust a. While dropping the dust a, it passes under the rubber curtain 6 and enters the hopper rear chamber 4b. After dropping most dust a here, it passes through the net filter 8 and enters the air passage 7. The airflow entering the air passage 7 is exhausted from the exhaust air passage 10 by the blower 9.
一方、第１図〜第３図において、16aはホッパ前部室4a
内の堆積塵量を検出する堆積塵量検出部、16bはホッパ
後部室4b内の堆積塵量を検出する堆積塵量検出部であ
り、この堆積塵量検出部16a,16bはいずれも超音波によ
ってホッパ内堆積塵量を検出する構成となっている。On the other hand, in FIGS. 1 to 3, 16a is a hopper front chamber 4a.
The accumulated dust amount detecting section for detecting the accumulated dust amount inside, 16b is the accumulated dust amount detecting section for detecting the accumulated dust amount inside the hopper rear chamber 4b, and both of these accumulated dust amount detecting sections 16a, 16b are ultrasonic waves. Is configured to detect the amount of dust accumulated in the hopper.
すなわち、この堆積塵量検出部16a,16bは、ホッパ４内
の底部に堆積する塵芥ａに向けて超音波を発射する超音
波送信器17と、堆積塵芥層によって反射された反射波を
受信する超音波受信器18とを備えたもので、この超音波
送受信器17,18は、ホッパ４の上部にその上面より風路
７側に凹入させて次のように設けられている。That is, the accumulated dust amount detection units 16a and 16b receive an ultrasonic transmitter 17 that emits an ultrasonic wave toward the dust a accumulated on the bottom of the hopper 4, and a reflected wave reflected by the accumulated dust layer. An ultrasonic receiver 18 is provided, and the ultrasonic transmitters / receivers 17, 18 are provided in the upper part of the hopper 4 so as to be recessed from the upper surface to the air passage 7 side as follows.
まずホッパ前部室4aに設けられる超音波送受信器17、18
の設置構造を説明すると、このホッパ前部室4a側の超音
波送信器17と超音波受信器18は、第１図および第２図に
示すように、ホッパ前部室4aの上部両側に設けられてい
る左右のガード板15,15間の間隔部分に対向させて、ホ
ッパ前部室4aの上部中央部分にホッパ長さ方向に並べて
配置されている。First, the ultrasonic transceivers 17, 18 provided in the hopper front chamber 4a
The ultrasonic transmitter 17 and the ultrasonic receiver 18 on the side of the hopper front chamber 4a are provided on both upper sides of the hopper front chamber 4a as shown in FIGS. 1 and 2. They are arranged side by side in the hopper length direction in the central portion of the upper part of the hopper front chamber 4a so as to face the space between the left and right guard plates 15, 15.
このようにホッパ前部室4a側の超音波送受信器17,18を
左右のガード板15,15間の間隔部分に対向させてホッパ
長さ方向に並べて配置しているのは、塵芥吹出口13から
吹出される空気流が超音波送受信器17,18に直接当らな
いようにするためであり、左右のガード板15,15間の部
分つまりホッパ上部の巾方向中央部分は、塵芥吹出口13
から吹出されてガード板15に当って方向を変えられる空
気流が直接当らない流れのよどみ部になっているため、
この部分に超音波送受信器17,18を配置しておけば、塵
芥吹出口13から吹出される空気流中の塵芥が超音波送受
信器17,18にぶつかって、この超音波送受信器17,18が損
傷することはない。In this way, the ultrasonic transmitters / receivers 17, 18 on the hopper front chamber 4a side are arranged side by side in the hopper length direction so as to face the interval between the left and right guard plates 15, 15 from the dust outlet 13. This is to prevent the blown air flow from directly hitting the ultrasonic transceivers 17 and 18, and the portion between the left and right guard plates 15 and 15, that is, the central portion in the width direction of the upper part of the hopper, is the dust outlet 13.
Because it is a stagnation part of the flow that does not directly hit the air flow that is blown from and hits the guard plate 15 and can change direction
If the ultrasonic transmitters / receivers 17, 18 are arranged in this portion, the dust in the air flow blown out from the dust outlet 13 hits the ultrasonic transmitters / receivers 17, 18 and the ultrasonic transmitters / receivers 17, 18 Will not be damaged.
また、このホッパ前部室4a側の超音波送信器17と超音波
受信器18は、それぞれ、ホッパ４上の風路７に垂直に貫
通された下端がホッパ前部室4a内に開放する筒体19,19
内に設けられている。Further, the ultrasonic transmitter 17 and the ultrasonic receiver 18 on the hopper front chamber 4a side respectively have a cylindrical body 19 whose lower ends vertically penetrated by the air passage 7 on the hopper 4 are open to the inside of the hopper front chamber 4a. , 19
It is provided inside.
第４図はホッパ前部室4a側の超音波送信器17の設置構造
を拡大して示したもので、超音波送信器17は、前記筒体
19内に設けた下方に向かって大径となるラッパ管20の上
端部に取付けられている。なお、17aは超音波送信器17
に接続されたコードであり、このコード17aは、運転室
２内に設けられているホッパ内塵量測定演算部30に接続
されている。FIG. 4 is an enlarged view showing the installation structure of the ultrasonic transmitter 17 on the side of the hopper front chamber 4a.
It is attached to the upper end of a trumpet tube 20 provided inside 19 and having a large diameter toward the bottom. In addition, 17a is an ultrasonic transmitter 17
The cord 17a is connected to a hopper internal dust amount measurement calculation unit 30 provided in the operator's cab 2.
また、前記筒体19の上端には、ダンプユニット３の外部
と筒体19内とを連通する通気孔21が設けられており、さ
らにラッパ管20の上端部つまり超音波送信器17の近傍に
は、超音波送信器17の前面（下面）に沿って空気を吹出
す空気吹出部22が設けられている。この空気吹出部22
は、前記ラッパ管20に孔を穿設して形成されている。A ventilation hole 21 is provided at the upper end of the cylindrical body 19 to connect the outside of the dump unit 3 and the inside of the cylindrical body 19, and further near the upper end of the trumpet tube 20, that is, near the ultrasonic transmitter 17. Is provided with an air blowing portion 22 that blows air along the front surface (lower surface) of the ultrasonic transmitter 17. This air outlet 22
Are formed by forming holes in the trumpet tube 20.
この空気吹出部22は、ブロワ９による空気吸引により負
圧となっているホッパ内圧と外気圧との差により前記通
気孔21を介して外部から空気を吸引し、この空気を超音
波送信器17の前面部に吹出して超音波送信器17の前面に
浮遊してくるホッパ４内の埃を吹払うもので、これによ
り超音波送信器17の前面つまり超音波発射面は常に埃が
付着しない状態に保たれるようになっている。これは、
ホッパ前部室4a側の超音波受信器18の設置構造において
も同様である。The air blower 22 sucks air from the outside through the vent hole 21 due to the difference between the internal pressure of the hopper and the external pressure, which are negative due to the suction of air by the blower 9, and the ultrasonic transmitter 17 The dust in the hopper 4 that blows out to the front surface of the ultrasonic transmitter 17 and floats on the front surface of the ultrasonic transmitter 17 is blown away, so that the front surface of the ultrasonic transmitter 17, that is, the ultrasonic wave emitting surface is always free of dust. It is designed to be kept at. this is,
The same applies to the installation structure of the ultrasonic receiver 18 on the hopper front chamber 4a side.
次に、ホッパ後部室4bに設けられる超音波送受信器17,1
8の設置構造を説明すると、このホッパ後部室4b側の超
音波送信器17と超音波受信器18は、第１図および第３図
に示すように、ホッパ後部室4aの上部中央部分に任意の
方向例えばホッパ巾方向に並べて配置されている。Next, the ultrasonic transceivers 17, 1 provided in the hopper rear chamber 4b
Explaining the installation structure of 8, the ultrasonic transmitter 17 and the ultrasonic receiver 18 on the side of the hopper rear chamber 4b can be arbitrarily arranged in the upper central portion of the hopper rear chamber 4a as shown in FIGS. 1 and 3. Direction, for example, the width direction of the hopper.
また、このホッパ後部室4b側の超音波送信器17と超音波
受信器18は、それぞれ、網フィルタ８上の風路７に垂直
に貫通された下端がホッパ後部室4b内に解放する筒体1
9,19に、上記ホッパ前部室4a側の超音波送受信器17、18
と同様にラッパ管を介して設置されており、前記ラッパ
管にも、超音波送信器17および超音波受信器18の前面の
近傍に、ホッパ内圧と外気圧との差により筒体19,19の
上端の通気孔を介して外部から空気を吸引して超音波送
信器17および超音波受信器18の前面部に吹出す空気吹出
部（図示せず）が設けられている。Further, the ultrasonic transmitter 17 and the ultrasonic receiver 18 on the side of the hopper rear chamber 4b are cylindrical bodies in which the lower ends vertically penetrating the air passage 7 on the net filter 8 are released into the hopper rear chamber 4b. 1
9,19, ultrasonic transmitters / receivers 17, 18 on the hopper front chamber 4a side
It is installed via a trumpet tube in the same manner as above, and also in the trumpet tube, in the vicinity of the front surfaces of the ultrasonic transmitter 17 and the ultrasonic receiver 18, due to the difference between the internal pressure of the hopper and the external pressure, the tubular body 19,19. An air blow-out portion (not shown) for sucking air from the outside through a vent hole at the upper end of the air blower and blowing the air to the front surfaces of the ultrasonic transmitter 17 and the ultrasonic receiver 18 is provided.
第５図はホッパ内塵量の測定回路を示したもので、ホッ
パ前部室4a側の超音波送信器17と超音波受信器18および
ホッパ後部室4b側の超音波送信器17と超音波受信器18は
それぞれ運転室２内に設けられているホッパ内塵量測定
演算部30に接続されている。FIG. 5 shows a measurement circuit for measuring the amount of dust in the hopper. The ultrasonic transmitter 17 and the ultrasonic receiver 18 on the hopper front chamber 4a side and the ultrasonic transmitter 17 and the ultrasonic receiver 17 on the hopper rear chamber 4b side are shown. Each of the containers 18 is connected to a hopper dust amount measuring / calculating unit 30 provided in the cab 2.
この演算部30は、超音波送信器17から発射された超音波
の反射波が超音波受信器18に受信されるまでの時間をカ
ウントし、そのアウント値に基づいてホッパ内塵量つま
り塵芥ａの堆積高さを判定するもので、この演算部30に
おいて判定されたホッパ前部室4a側およびホッパ後部室
4b側の塵芥堆積高さは、運転室２内の表示部31（例えば
第１図に示すようにホッパ内塵量測定演算部30の上に設
けられている）に送られて、ホッパ前部室4a側およびホ
ッパ後部室4b側の塵芥堆積高さを示す２本のバー表示32
a,32bによって表示される。なお、図中33および34は、
表示部31の表示面に印刷されているホッパ内隔壁および
堆積塵芥を表わすイラストである。The calculation unit 30 counts the time until the reflected wave of the ultrasonic wave emitted from the ultrasonic transmitter 17 is received by the ultrasonic receiver 18, and based on the out value, the dust amount in the hopper, that is, the dust a. The hopper front chamber 4a side and the hopper rear chamber determined by the calculation unit 30 are determined.
The dust accumulation height on the 4b side is sent to a display unit 31 in the operator's cab 2 (for example, provided on the hopper internal dust amount measurement calculation unit 30 as shown in FIG. 1), and the hopper front chamber Two bar displays showing the height of dust accumulation on the 4a side and the hopper rear chamber 4b side 32
Displayed by a, 32b. 33 and 34 in the figure are
5 is an illustration showing a partition wall in the hopper and accumulated dust on the display surface of the display unit 31.
すなわち、このホッパ内塵量測定装置は、下部にゴムカ
ーテン６を有する隔壁５により前部室4aと後部室4bとに
仕切られたホッパ４内の前部室4aと後部室4bとにそれぞ
れ、ホッパ４内の堆積塵芥ａに向けて超音波を発射する
とともにその反射波を受信してホッパ４内の堆積塵量を
検出する超音波送受信器17,18を設けて、ホッパ４内の
堆積塵量を超音波によって検出するものであり、このよ
うにホッパ４内の堆積塵量を超音波によって検出すれ
ば、ホッパ４内に堆積する塵芥の重量や車体振動等の影
響を受けることなくホッパ４内の堆積塵量をほぼ正確に
測定することができる。That is, this hopper internal dust amount measuring apparatus has a front chamber 4a and a rear chamber 4b in the hopper 4, which are partitioned into a front chamber 4a and a rear chamber 4b by a partition wall 5 having a rubber curtain 6 at the bottom, respectively. The ultrasonic transmitters / receivers 17, 18 for emitting ultrasonic waves toward the accumulated dust in the inside and receiving the reflected waves to detect the amount of accumulated dust in the hopper 4 are provided to detect the amount of accumulated dust in the hopper 4. The amount of dust accumulated in the hopper 4 is detected by ultrasonic waves in this way. If the amount of dust accumulated in the hopper 4 is detected by ultrasonic waves in this way, the amount of dust accumulated in the hopper 4 is not affected by the weight of dust accumulated in the hopper 4, the vehicle body vibration, or the like. The amount of accumulated dust can be measured almost accurately.
しかも、このホッパ内塵量測定装置においては、上記超
音波送受信器17,18の近傍に、この超音波送受信器17,18
の前面部に空気を吹出す空気吹出部22を設けて、超音波
送受信器17,18の前面に浮遊している埃を空気によって
吹払うようにしているため、超音波送受信器17,18の前
面に埃が付着して超音波による堆積塵量検出能力が低下
するようなことはない。Moreover, in the hopper dust amount measuring apparatus, the ultrasonic transceivers 17, 18 are provided in the vicinity of the ultrasonic transceivers 17, 18.
The air blower 22 for blowing air is provided on the front surface of the ultrasonic wave transmitter / receiver 17, 18 so that the dust floating on the front surface of the ultrasonic wave transmitter / receiver 17, 18 is blown off by the air. There is no possibility that dust adheres to the front surface and the capability of detecting the amount of accumulated dust by ultrasonic waves deteriorates.
さらに、このホッパ内塵量測定装置では、ホッパ前部室
4aの上部にガード板15を設けて、このガード板15によ
り、ホッパ前壁部の塵芥吹出口13から前部室4aの上面に
向けて吹出される空気流の向きを、前部室4aの上部に設
けた超音波送受信器17,18に直接当らない方向に変えて
やるようにしているため、塵芥吹出口13からホッパ４内
に吹出される空気流中の塵芥が前部室4aの超音波送受信
器17,18にぶつかってこの超音波送受信器17,18を損傷す
ることがないだけでなく、前記空気吹出部22から超音波
送受信器17,18の前面部に吹出される空気が、塵芥吹出
口13から吹出される空気流の影響を受けることがほとん
どないから、前記空気吹出部22からの吹出し空気が、ホ
ッパ内圧と外気圧との差によって外部から吸引されたあ
まり圧力が高くない空気であっても、超音波送受信器1
7,18の前面に浮遊している埃を良好に吹払って、超音波
送受信器17,18の前面に埃が付着するのを防ぐことがで
きる。Furthermore, in this hopper dust amount measuring device, the hopper front chamber
A guard plate 15 is provided on the upper part of 4a, and by this guard plate 15, the direction of the air flow blown from the dust outlet 13 of the front wall of the hopper toward the upper surface of the front chamber 4a is directed to the upper part of the front chamber 4a. Since the ultrasonic wave transmitters / receivers 17 and 18 are provided so as not to directly touch the ultrasonic wave transmitter / receiver 17, the dust in the air flow blown from the dust outlet 13 into the hopper 4 is transmitted to the ultrasonic transmitter / receiver in the front chamber 4a. Not only this ultrasonic transceiver 17 or 18 is not damaged by hitting 17,18, but the air blown from the air outlet 22 to the front face of the ultrasonic transceiver 17 or 18 is a dust outlet. Since the air blown out from the air blower 13 is hardly affected, the air blown out from the air blower 22 is the air sucked from the outside due to the difference between the internal pressure of the hopper and the external air pressure and not so high. Even an ultrasonic transceiver 1
It is possible to favorably blow off the dust floating on the front surfaces of the 7, 18 to prevent the dust from adhering to the front surfaces of the ultrasonic transceivers 17, 18.
なお、この実施例では、ホッパ４の後部室4bには上記ガ
ード板15を設けていないが、塵芥吹出口13からホッパ前
部室4a内に吹出された空気流は、この前部室4aにおいて
ガード板15に当って流速を減じるとともに重量のある塵
芥ａを落下させ、さらに塵芥ａを落下させながらゴムカ
ーテン６の下を通ってホッパ後部室4b内に入るため、前
部室4aから後部室4bに流入する空気流は、塵芥量が少な
く、また流速も低くなった空気流であり、したがって、
後部室4bの超音波送受信器17,18が空気流中の塵芥によ
って損傷することはないし、またこの超音波送受信器1
7,18の前面部に空気吹出部22から吹出される空気が、前
部室4aから後部室4bに流入する空気流の影響を受けるこ
ともないから、ホッパ後部室4bの超音波送受信器17,18
の前面に浮遊してくる埃も良好に吹出払って、この超音
波送受信器17,18の前面に埃が付着するのを防ぐことが
できる。In addition, in this embodiment, the guard plate 15 is not provided in the rear chamber 4b of the hopper 4, but the air flow blown from the dust outlet 13 into the hopper front chamber 4a does not affect the guard plate in the front chamber 4a. The flow velocity is reduced at 15 and heavy dust a is dropped, and while dropping dust a, it passes under the rubber curtain 6 and enters the rear chamber 4b of the hopper, so that it flows from the front chamber 4a to the rear chamber 4b. The air flow to be generated is an air flow having a small amount of dust and a low flow velocity.
The ultrasonic transceivers 17 and 18 in the rear chamber 4b are not damaged by dust in the air flow, and the ultrasonic transceiver 1
The air blown from the air blower 22 to the front part of the 7,18 is not affected by the air flow flowing into the rear chamber 4b from the front chamber 4a, so the ultrasonic transmitter / receiver 17 of the hopper rear chamber 4b, 18
The dust floating on the front surface of the ultrasonic wave transmitter / receiver can also be blown off satisfactorily to prevent the dust from adhering to the front surface of the ultrasonic transceivers 17, 18.
ただし、上記空気吹出部22からの吹出し空気は、超音波
送受信器17,18の前面に浮遊してくる埃を吹払う程度の
ものであって、ホッパ４内を浮遊する埃までは吹払えな
いため、ホッパ４の前部室4aにおいても後部室4bにおい
ても、ホッパ４内を浮遊する埃が超音波送受信器17,18
による堆積塵量の検出精度にある程度影響するが、従来
の堆積塵量測定において問題とされている塵芥の重量や
車体振動等の影響に比べれば、浮遊埃による検出精度へ
の影響は小さいから、ホッパ内の堆積塵量をほぼ正確に
測定することができる。However, the air blown out from the air blower 22 only blows away dust floating on the front surfaces of the ultrasonic transceivers 17 and 18, and cannot blow up dust floating inside the hopper 4. Therefore, in both the front chamber 4a and the rear chamber 4b of the hopper 4, the dust floating in the hopper 4 is absorbed by the ultrasonic transceivers 17,18.
Although it affects the detection accuracy of the accumulated dust amount to some extent, compared to the effects of dust weight and vehicle body vibration, which are problems in the conventional accumulated dust amount measurement, the influence of the suspended dust on the detection accuracy is small. The amount of accumulated dust in the hopper can be measured almost accurately.
また、超音波送受信器17,18の前面に浮遊してくる埃の
量は、ホッパ４内の堆積塵量が増えるのにともなって多
くなるが、この浮遊埃量が堆積塵量の検出精度に影響を
及ぼす程度に多くなるのは、塵芥ａが許容高さを越えて
超音波送受信器17,18の近くまで堆積したときであり、
清掃車は、〔従来の技術〕の項でも説明したように、ホ
ッパ内の堆積塵量が許容高さ近くになったところで清掃
を中止して廃棄場に向かうため、ホッパ４内の堆積塵量
が許容高さを越えることは現実には考えられない。Further, the amount of dust floating on the front surfaces of the ultrasonic transmitters / receivers 17, 18 increases as the amount of accumulated dust in the hopper 4 increases, but this amount of suspended dust affects the detection accuracy of the accumulated dust amount. The influence is increased when the dust a exceeds the allowable height and accumulates near the ultrasonic transceivers 17 and 18,
As described in the section [Prior Art], the cleaning vehicle stops cleaning when the amount of accumulated dust in the hopper is close to the allowable height and goes to the waste site. Therefore, the amount of accumulated dust in the hopper 4 is increased. It is unthinkable that the man exceeds the allowable height.
そして、上記清掃車においては、塵芥吹出口13がホッパ
内の堆積塵芥ａで塞がれるようになると、塵芥ａの吸込
み能率が著しく低下するため、堆積塵量の許容高さは塵
芥吹出口13より低いレベルであり、したがって、堆積塵
量が許容高さ近くになったときでも超音波送受信器17,1
8は堆積塵量ａから十分に離れているから、超音波送受
信器17,18の前面に浮遊してくる埃の量が堆積塵量の検
出精度に影響を及ぼす程度に多くなることはない。Further, in the above cleaning vehicle, when the dust outlet 13 is blocked by the accumulated dust a in the hopper, the suction efficiency of the dust a is significantly reduced. Therefore, the allowable amount of accumulated dust is higher than the dust outlet 13 It is at a lower level, so the ultrasonic transceiver 17,1 can be used even when the amount of accumulated dust is close to the allowable height.
Since 8 is sufficiently distant from the accumulated dust amount a, the amount of dust floating on the front surfaces of the ultrasonic wave transmitters / receivers 17, 18 does not increase to such an extent that the accumulated dust amount detection accuracy is affected.
なお、上記実施例では、ホッパ前部室4a側の超音波送信
器17と超音波受信器18およびホッパ後部室4b側の超音波
送信器17と超音波受信器18をそれぞれホッパ上部の中央
部分に並べて設けているが、例えば第６図に示すように
ホッパ前部室4a側の超音波送信器17をホッパ上部の中央
部分に設け、この超音波送信器17から発射された超音波
の反射波をホッパ上部の両側端部に設けた２つの超音波
受信器18、18で受信するようにすれば、ホッパ４内の堆
積塵量が左右いずれかに偏った場合でもそれをほぼ正確
に把握することができる。これは、ホッパ後部室4b側に
おいても同様である。なお、このように超音波送信器17
から発射された超音波の反射波を２つの超音波受信器1
8、18で受信する場合は、表示部31に、２つの超音波受
信器18、18にそれぞれ対応する表示を行わせればよい。In the above embodiment, the ultrasonic transmitter 17 and the ultrasonic receiver 18 on the side of the hopper front chamber 4a and the ultrasonic transmitter 17 and the ultrasonic receiver 18 on the side of the hopper rear chamber 4b are located in the central portions of the upper parts of the hoppers. Although arranged side by side, for example, as shown in FIG. 6, the ultrasonic transmitter 17 on the hopper front chamber 4a side is provided in the central portion of the upper part of the hopper, and the reflected waves of the ultrasonic waves emitted from this ultrasonic transmitter 17 are provided. Even if the amount of dust accumulated in the hopper 4 is biased to the left or right, the two ultrasonic receivers 18, 18 provided at both ends of the upper part of the hopper can be used to detect it almost accurately. You can This also applies to the hopper rear chamber 4b side. In addition, the ultrasonic transmitter 17
Two ultrasonic receivers for reflected waves of ultrasonic waves emitted from 1
When receiving at 8 and 18, it suffices to cause the display unit 31 to perform displays corresponding to the two ultrasonic wave receivers 18 and 18, respectively.
また、上記実施例では、ホッパ前部室4aとホッパ後部室
4bとにそれぞれ超音波送信器17と超音波受信器18設けて
いるが、塵芥ａの吸込み能率に影響するのはホッパ前部
室4a内の堆積塵量であり、したがってこの前部室4a内の
堆積塵量が測定できれば十分であるから、前記超音波送
受信器17、18は、少なくともホッパ前部室4aに設ければ
よい。Further, in the above embodiment, the hopper front chamber 4a and the hopper rear chamber 4a
An ultrasonic transmitter 17 and an ultrasonic receiver 18 are provided in 4b and 4b, respectively, but it is the amount of accumulated dust in the front chamber 4a of the hopper that affects the suction efficiency of the dust a, and therefore the accumulation in the front chamber 4a. Since it is sufficient if the dust amount can be measured, the ultrasonic transceivers 17 and 18 may be provided at least in the hopper front chamber 4a.
さらに、上記実施例では、超音波送受信器17、18を風路
７を貫通する筒体19、19内にラッパ管20を介して設置
し、前記筒体19の上端に通気孔21を設けるとともに、ラ
ッパ管20に、超音波送受信器17、18の前面部に空気を吹
出す空気吹出部22を設けているが、前記超音波送受信器
17、18は第７図に示すように設置してもよい。すなわ
ち、第７図に示す実施例は、風路７の底面上に下端がホ
ッパ内に開放する送受信器収納室23を設け、この送受信
器収納室23内の上部に超音波送信器17（または超音波受
信器18）を取付けるとともに、送受信器収納室23内に空
気吹出管24を挿入し超音波送信器17（または超音波受信
器18）の前面部に空気を吹出す空気吹出部を構成したも
のであり、この空気吹出管24の他端側は、適当箇所にお
いて外部に閉口されている。なお、この実施例のように
空気吹出管24から超音波送信器17（または超音波受信器
18）前面部に空気を吹出すようにする場合は、ホッパ内
圧と、外気圧との差により外部から空気を吸引する代わ
りに、エアーポンプ等により強制的に超音波送受信器1
7、18の前面部に空気を吹出すようにしてもよい。Further, in the above embodiment, the ultrasonic transmitters / receivers 17, 18 are installed in the tubular bodies 19, 19 penetrating the air passage 7 via the trumpet tube 20, and the ventilation holes 21 are provided at the upper end of the tubular body 19. The trumpet tube 20 is provided with an air blowing portion 22 for blowing air on the front surface of the ultrasonic transceivers 17 and 18.
17 and 18 may be installed as shown in FIG. That is, in the embodiment shown in FIG. 7, a transmitter / receiver storage chamber 23 whose lower end opens into the hopper is provided on the bottom surface of the air passage 7, and an ultrasonic transmitter 17 (or an ultrasonic transmitter 17 (or In addition to mounting the ultrasonic receiver 18), an air blowing pipe 24 is inserted into the transmitter / receiver storage chamber 23 to form an air blowing portion for blowing air to the front surface of the ultrasonic transmitter 17 (or the ultrasonic receiver 18). The other end of the air outlet pipe 24 is closed to the outside at an appropriate place. In addition, as in this embodiment, the ultrasonic transmitter 17 (or the ultrasonic receiver) is supplied from the air outlet pipe 24.
18) When air is blown to the front part, instead of sucking air from the outside due to the difference between the internal pressure of the hopper and the external atmospheric pressure, the ultrasonic transmitter / receiver 1 is forced by an air pump or the like.
You may make it blow out air to the front part of 7,18.
なお、上記実施例では、車体１の両側に塵芥吸込部11を
備えている清掃車を示したが、この発明は、片側だけに
塵芥吸込部を備えた、ホッパ内に塵芥を吹出す塵芥吹出
口が片側だけにある清掃車にも適用できるし、また路面
清掃機能の他に側溝や集水桝等の泥土等の塵芥をホース
により吸込んでホッパ内に集塵する清掃機能も備えた清
掃車や、側溝や集水桝等の専用清掃車にも適用できるこ
とはもちろんである。In the above-described embodiment, the cleaning vehicle having the dust suction portions 11 on both sides of the vehicle body 1 is shown. However, the present invention has a dust suction portion provided on only one side and blows the dust into the hopper. It can be applied to a cleaning vehicle that has an outlet on only one side, and in addition to a road surface cleaning function, it also has a cleaning function that sucks dirt such as mud from the gutters and collecting basins with a hose and collects it in the hopper. Of course, it can also be applied to a dedicated cleaning vehicle such as a gutter or a water collecting basin.
この発明は、下部にゴムカーテンを有する隔壁により前
部室と後部室とに仕切られたホッパ内の少なくとも前部
室の上部に、ホッパ内の堆積塵芥に向けて超音波を発射
するとともにその反射波を受信してホッパ内の堆積塵量
を検出する超音波送受信器を設けて、ホッパ内の堆積塵
量を超音波により検出するものであるから、ホッパ内に
堆積する塵芥の重量や車体振動等の影響を受けることな
くホッパ内の堆積塵量をほぼ正確に測定することができ
る。This invention emits an ultrasonic wave toward the accumulated dust in the hopper and emits a reflected wave of the ultrasonic wave toward at least the upper part of the front chamber in the hopper divided into the front chamber and the rear chamber by the partition having the rubber curtain at the bottom. An ultrasonic transmitter / receiver that receives and detects the amount of accumulated dust in the hopper is provided, and the amount of accumulated dust in the hopper is detected by ultrasonic waves. The amount of accumulated dust in the hopper can be measured almost accurately without being affected.
しかも、この発明においては、前記超音波送受信器の近
傍に、この送受信器の前面部に空気を吹出す空気吹出部
を設けて、超音波送受信器の前面に浮遊してくる埃を空
気によって吹払うようにしているため、超音波送受信器
の前面に埃が付着して超音波による堆積塵量検出能力が
低下するようなことはない。Moreover, in the present invention, an air blowing section for blowing air is provided on the front surface of the ultrasonic transmitter / receiver in the vicinity of the ultrasonic transmitter / receiver so that dust floating on the front surface of the ultrasonic transmitter / receiver is blown by the air. Since the cleaning is performed, dust does not adhere to the front surface of the ultrasonic transmitter / receiver and the capability of detecting the amount of accumulated dust by ultrasonic waves does not deteriorate.
さらに、この発明では、前記前部室の上部に、ホッパ前
壁部の塵芥吹出口から前部室上面に向けて吹出される空
気流の向きを前記超音波送受信器に直接当らない方向に
変えるガード板を設けているため、前記塵芥吹出口から
ホッパ内に吹出される空気流中の塵芥が超音波送受信器
にぶつかってこの超音波送受信器を損傷することがない
だけでなく、前記空気吹出部から超音波送受信器の前面
部に吹出される空気が、塵芥吹出口から吹出される空気
流の影響を受けることがほとんどないから、前記空気吹
出部からの吹出し空気があまり圧力が高くない空気であ
っても、超音波送受信器の前面に浮遊してくる埃を良好
に吹払って、超音波送受信器の前面に埃が付着するのを
防ぐことができる。Further, in the present invention, a guard plate is provided on the upper portion of the front chamber for changing the direction of the air flow blown from the dust outlet of the front wall of the hopper toward the upper surface of the front chamber so as not to directly hit the ultrasonic transceiver. Since it is provided, not only does the dust in the air flow blown into the hopper from the dust outlet not hit the ultrasonic transceiver to damage the ultrasonic transceiver, but also from the air outlet. The air blown to the front of the ultrasonic transceiver is hardly affected by the air flow blown from the dust outlet, so the air blown from the air blower is not so high in pressure. Even if the dust floating on the front surface of the ultrasonic transmitter / receiver is satisfactorily blown off, it is possible to prevent the dust from adhering to the front surface of the ultrasonic transmitter / receiver.
第１図〜第５図はこの発明の一実施例を示したもので、
第１図は清掃車の縦断側面図、第２図および第３図は第
１図のＡ−Ａ線およびＢ−Ｂ線に沿う断面図、第４図は
第１図のＣ部分の拡大図、第５図はホッパ内塵量の測定
回路を示すブロック図である。第６図および第７図はそ
れぞれこの発明の他の実施例を示したもので、第６図は
清掃車のホッパ部の断面図、第７図は超音波送受信器の
設置構造を示す拡大断面図である。 １……車体、４……ホッパ、4a……前部室、4b……後部
室、５……隔壁、６……ゴムカーテン、15……ガード
板、17……超音波送信器、18……超音波受信器、22……
空気吹出部、24……空気吹出管、ａ……塵芥。1 to 5 show an embodiment of the present invention.
FIG. 1 is a vertical side view of a cleaning vehicle, FIGS. 2 and 3 are sectional views taken along the lines AA and BB of FIG. 1, and FIG. 4 is an enlarged view of a portion C of FIG. 5 is a block diagram showing a measuring circuit for measuring the amount of dust in the hopper. 6 and 7 show other embodiments of the present invention respectively. FIG. 6 is a sectional view of a hopper portion of a cleaning vehicle, and FIG. 7 is an enlarged sectional view showing an ultrasonic transmitter / receiver installation structure. It is a figure. 1 ... vehicle body, 4 ... hopper, 4a ... front chamber, 4b ... rear chamber, 5 ... bulkhead, 6 ... rubber curtain, 15 ... guard plate, 17 ... ultrasonic transmitter, 18 ... Ultrasonic receiver, 22 ……
Air outlet, 24 ... Air outlet pipe, a ... Dust.
Claims (1)
る清掃車のホッパ内堆積塵量を測定する装置であって、 下部にゴムカーテンを有する隔壁により前部室と後部室
とに仕切られたホッパ内の少なくとも前部室の上部に、
ホッパ内の堆積塵芥に向けて超音波を発射するとともに
その反射波を受信してホッパ内の堆積塵量を検出する超
音波送受信器を設け、かつ、前記前部室の上部に、ホッ
パ前壁部の塵芥吹出口から前部室上面に向けて吹出され
る空気流の向きを前記超音波送受信器に直接当らない方
向に変えるガード板を設けるとともに、前記超音波送受
信器の近傍に、この送受信器の前面部に空気を吹出す空
気吹出部を設けたことを特徴とする清掃車のホッパ内塵
量測定装置。1. A device for measuring an amount of accumulated dust in a hopper of a cleaning vehicle that sucks dust and collects it in a hopper on a vehicle body, which is divided into a front chamber and a rear chamber by a partition wall having a rubber curtain at a lower portion. At least in the upper part of the front chamber in the hopper
An ultrasonic transmitter / receiver is provided which emits an ultrasonic wave toward the accumulated dust in the hopper and receives the reflected wave to detect the amount of accumulated dust in the hopper, and at the top of the front chamber, a front wall of the hopper is provided. While providing a guard plate that changes the direction of the air flow blown from the dust outlet toward the upper surface of the front chamber to a direction that does not directly hit the ultrasonic transceiver, in the vicinity of the ultrasonic transceiver, An apparatus for measuring the amount of dust in a hopper of a cleaning vehicle, characterized in that an air blowing portion for blowing air is provided on a front surface portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61001313A JPH0714762B2 (en) | 1986-01-09 | 1986-01-09 | Device for measuring dust amount in the hopper of cleaning vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61001313A JPH0714762B2 (en) | 1986-01-09 | 1986-01-09 | Device for measuring dust amount in the hopper of cleaning vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62161602A JPS62161602A (en) | 1987-07-17 |
| JPH0714762B2 true JPH0714762B2 (en) | 1995-02-22 |
Family
ID=11498009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61001313A Expired - Fee Related JPH0714762B2 (en) | 1986-01-09 | 1986-01-09 | Device for measuring dust amount in the hopper of cleaning vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0714762B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5634961B2 (en) * | 2011-08-25 | 2014-12-03 | 有限会社広和金属工業 | Sludge treatment method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5540164A (en) * | 1978-09-14 | 1980-03-21 | Shin Meiwa Ind Co Ltd | Method of and apparatus for recovering cans |
| JPS55100108U (en) * | 1978-12-29 | 1980-07-12 | ||
| JPS5640101U (en) * | 1979-04-17 | 1981-04-14 | ||
| JPS56138217A (en) * | 1980-03-31 | 1981-10-28 | Minolta Camera Co Ltd | Surface position detecting method |
| JPS5917825U (en) * | 1982-07-23 | 1984-02-03 | 株式会社松島機械研究所 | Powder level detection device |
-
1986
- 1986-01-09 JP JP61001313A patent/JPH0714762B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62161602A (en) | 1987-07-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |