JP2007245751A - Heavy load carrying device - Google Patents

Heavy load carrying device Download PDF

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JP2007245751A
JP2007245751A JP2006067685A JP2006067685A JP2007245751A JP 2007245751 A JP2007245751 A JP 2007245751A JP 2006067685 A JP2006067685 A JP 2006067685A JP 2006067685 A JP2006067685 A JP 2006067685A JP 2007245751 A JP2007245751 A JP 2007245751A
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auxiliary wheel
road surface
traveling
transport
traveling road
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JP4714604B2 (en
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Mamoru Kamoshita
守 鴨志田
Kiyoshi Fujimoto
清志 藤本
Hitoshi Shimizu
清水  仁
Tadahiro Hoshikawa
忠洋 星川
Takashi Sato
隆 佐藤
Masatsugu Yamane
正嗣 山根
Takeshi Mannen
毅 萬年
Koji Busujima
康二 毒島
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Hitachi Ltd
Tokyo Electric Power Company Holdings Inc
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Tokyo Electric Power Co Inc
Hitachi Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To suppress meandering or displacement in a lateral direction by generating a friction between a part of a carrying base and a traveling road surface. <P>SOLUTION: A plurality of airbags 12 are disposed at the bottom part side of a carrying base 10 connected to a driving device 14. Air is supplied to respective airbags 12 to inflate them, and the air is exhausted from the airbag 12 to form a thin air film between the airbag 12 and the floor 20. In the process where the carrying base 10 travels straight by a driving force of a driving wheel 22 in such a state that the carrying base is lifted with a storage stand 16 and a metal cask 18, when a torque is generated on the carrying base 10 around the driving wheel 22, straight travelability of an air pallet can be improved by negating the torque with an auxiliary wheel 24. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、重量物搬送装置に係り、特に、放射性物質を収納した容器などの重量物を搬送するに好適な重量物搬送装置に関する。   The present invention relates to a heavy material transport device, and more particularly to a heavy material transport device suitable for transporting a heavy material such as a container containing a radioactive substance.

原子力発電プラントにおいては、原子炉から取り出された使用済燃料集合体を再処理するまでの間、使用済燃料集合体を一時的に貯蔵する中間貯蔵構想が本格化しつつある。代表的な中間貯蔵方式の1つには、金属キャスク方式が挙げられる。金属キャスクは、円筒状の鋼製容器で、使用済燃料集合体を70体程度収納可能に構成されており、1基の重量が100トンを超える重量物である。このような重量物を貯蔵建屋内に搬送するに際しては、従来、貯蔵建屋内のハンドリング方法として、天井クレーン方式が採用されており、また、近年では、エアパレットによる搬送方法も検討されている。   In a nuclear power plant, an intermediate storage concept for temporarily storing a spent fuel assembly until the spent fuel assembly taken out from the nuclear reactor is reprocessed is in full swing. One typical intermediate storage method is a metal cask method. The metal cask is a cylindrical steel container configured to be able to store about 70 spent fuel assemblies, and one unit is a heavy object having a weight exceeding 100 tons. When transporting such heavy objects into the storage building, conventionally, an overhead crane system has been adopted as a method for handling the storage building, and recently, a transport method using an air pallet has also been studied.

エアパレットによる搬送方法においては、貯蔵架台上に金属キャスクを取り付け、駆動装置の前側に連結された一対の搬送台を貯蔵架台の底面側に挿入し、各搬送台の下面に設けられたエアバックに圧縮空気を供給して膨らませ、各搬送台とともに金属キャスクと貯蔵架台を浮上させる構成が採用されている。圧縮空気の供給を受けて膨らんだエアバックからは床面(走行路面)に向けて空気が吹き出すようになっており、この吹き出された空気によって、エアバックと床面との間に薄い空気層が生成され、この空気層によって各搬送台と床面との間の摩擦を小さくするようなっている。このため、100トンを超えるような重量物でも、比較的小さな駆動力で容易に移動させることができる。   In the transport method using an air pallet, a metal cask is attached on the storage platform, a pair of transport platforms connected to the front side of the drive unit are inserted into the bottom surface side of the storage platform, and an air bag provided on the lower surface of each transport platform A configuration is adopted in which compressed air is supplied to the swell to inflate, and the metal cask and the storage stand are levitated together with each carrier. Air is blown from the air bag inflated by the supply of compressed air toward the floor (traveling road surface), and a thin air layer is formed between the air bag and the floor by the blown air. This air layer reduces the friction between each carrier and the floor surface. For this reason, even a heavy object exceeding 100 tons can be easily moved with a relatively small driving force.

中間貯蔵施設内で金属キャスクを貯蔵架台とともにエアパレットで搬送する場合には、駆動装置の動作モードあるいは搬送モードとしては直進と旋回の2つが考えられる。例えば、施設の中央通路を進むときには、直進の搬送モードにしたがって重量物を搬送する必要がある。この場合、ある程度の直進走行性が要求される。一方、中央通路から側部の貯蔵位置に入る際には、旋回の搬送モードとして、中央通路上で旋回して向きを変える必要がある。このときにはスムーズな旋回特性が要求される。   When a metal cask is transported with an air pallet together with a storage stand in an intermediate storage facility, there are two possible modes of operation or transport mode of the drive device: straight travel and turning. For example, when traveling through the central passage of a facility, it is necessary to transport heavy objects according to the straight traveling mode. In this case, a certain degree of straight running performance is required. On the other hand, when entering the storage position of the side portion from the central passage, it is necessary to turn around the central passage and change the direction as a turning conveyance mode. At this time, a smooth turning characteristic is required.

貯蔵施設の床面は完全に平坦ではなく、局所的に凹凸があり、また全体としては、例えば、5/1000乃至10/1000程度の水切り勾配が設けられている場合もある。このような床面におけるエアパレット搬送システムの走行特性を発明者自ら試験を行って評価した結果、以下の知見が得られた。   The floor of the storage facility is not completely flat but locally uneven, and as a whole, for example, a water drainage gradient of about 5/1000 to 10/1000 may be provided. As a result of evaluating the running characteristics of such an air pallet transport system on the floor surface by conducting tests by the inventors themselves, the following knowledge was obtained.

床面に局所的な凹凸がある場合、キャスクの重心が凹凸の上を通過する際に、金属キャスクの重心が床面の低い方(凹部)に向かって移動する。すなわち、搬送システム全体に占める金属キャスクの重量割合が高いために、キャスクの重心の移動に伴って搬送システム全体が凹部に移動することになる。そのため、床面に凹凸がある場合には、エアパレット搬送システムは蛇行するような走行軌跡を描くことになる。   When there is local unevenness on the floor surface, the center of gravity of the metal cask moves toward the lower side (concave portion) of the floor when the center of gravity of the cask passes over the unevenness. That is, since the weight ratio of the metal cask in the entire transport system is high, the entire transport system moves to the recess as the center of gravity of the cask moves. Therefore, when the floor surface is uneven, the air pallet transport system draws a traveling locus that meanders.

また水切り勾配などの全体的な床面の傾斜に対しても、同様にキャスクの重心が傾斜面を降りるように移動する。そのため、エアパレットの進行方向に対して直交する傾斜面があると、搬送台および駆動装置を含むエアパレットは横方向に変位することになる。   Similarly, the cask's center of gravity moves so that the center of gravity of the cask descends the inclined surface even when the entire floor surface is inclined, such as a draining gradient. Therefore, if there is an inclined surface orthogonal to the traveling direction of the air pallet, the air pallet including the carriage and the drive device is displaced in the lateral direction.

エアパレットによる蛇行や横方向への変位は、操作者が左右駆動輪のトルクを調整することで是正することができる。しかし、エアパレットの蛇行や横方向への変位を是正するには、操作者が左右駆動輪のうち一方の駆動輪のトルクを高くし、他方の駆動輪のトルクを小さくする操作を頻繁に行うことが余儀なくされ、操作者の搬送作業時における負担が大きくなるのに加えて、搬送時間が長くなることによる作業被ばくを考慮する必要がある。   The meandering and lateral displacement caused by the air pallet can be corrected by the operator adjusting the torque of the left and right drive wheels. However, in order to correct the meandering and lateral displacement of the air pallet, the operator frequently increases the torque of one of the left and right drive wheels and decreases the torque of the other drive wheel. In addition to increasing the burden on the operator during the transportation work, it is necessary to consider the work exposure due to the long transportation time.

本発明の課題は、搬送台の一部と走行路面との間に摩擦を生じさせ、蛇行や横方向への変位を抑制することにある。   An object of the present invention is to cause friction between a part of a transport table and a traveling road surface, and to suppress meandering and lateral displacement.

前記課題を解決するために、本発明は、エアバックと走行路面との間に空気膜が形成され、複数の駆動輪の駆動にしたがって搬送台が搬送される過程で、複数の駆動輪が傾斜のある走行路面あるいは局所的に凹凸がある走行路面を走行するときに、いずれかの駆動輪を基準に搬送台に回転モーメントが生じたときには、この回転モーメントを打ち消すための回転モーメント打消し機構を搬送台に設けたものである。この回転モーメント打消し機構は、搬送機構の直進進行方向における摩擦よりも直進進行方向に対して直交する方向の摩擦が大きく、いずれかの駆動輪を基準に搬送台に回転モーメントが生じたときに、この回転モーメント打ち消すことで、エアパレット搬送システムが蛇行したり、横方向へ変位したりするのを防止することができる。   In order to solve the above-mentioned problems, the present invention provides a method in which an air film is formed between an air bag and a traveling road surface, and a plurality of driving wheels are inclined in a process in which a conveying table is conveyed according to driving of the plurality of driving wheels. When a rotational moment is generated on the carriage with reference to one of the drive wheels when traveling on a traveling road surface with local or unevenness, a rotational moment cancellation mechanism is provided to cancel this rotational moment. It is provided on the transfer table. This rotational moment canceling mechanism has a larger friction in the direction perpendicular to the straight traveling direction than the friction in the straight traveling direction of the transport mechanism, and when a rotational moment is generated on the transport base with any drive wheel as a reference. By canceling this rotational moment, it is possible to prevent the air pallet conveying system from meandering or being displaced laterally.

本発明によれば、傾斜面や凹凸のある走行路面を走行するときの直進性が向上するので、作業者の操作負荷を軽減することができる。   According to the present invention, since the straight traveling performance when traveling on an inclined surface or an uneven traveling road surface is improved, the operation load on the operator can be reduced.

以下、本発明の一実施形態を図面に基づいて説明する。図1は本発明の一実施形態を示す重量物搬送装置をエアパレット搬送システムに適用したときのブロック構成図である。重量物搬送装置(エアパレット)は、一対の搬送台10と、6個のエアバック(ダイヤフラグ)12、駆動装置14などを備えて構成されている。一対の搬送台10はその後端側が駆動装置14の前部側に一定の間隔を保って連結されており、各搬送台10はそれぞれ、図2に示すように、貯蔵架台16の底部側に挿入されて貯蔵架台16をその底部側から支持するようになっている。貯蔵架台16上には貯蔵対象物として、例えば、使用済燃料集合体が複数本収納された容器としての金属キャスク18が搭載されている。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram when a heavy-duty conveying apparatus showing an embodiment of the present invention is applied to an air pallet conveying system. The heavy article conveyance device (air pallet) includes a pair of conveyance tables 10, six airbags (diaphragm flags) 12, a drive device 14, and the like. The rear ends of the pair of transport tables 10 are connected to the front side of the driving device 14 at a constant interval, and each of the transport tables 10 is inserted into the bottom side of the storage stand 16 as shown in FIG. Thus, the storage stand 16 is supported from the bottom side. For example, a metal cask 18 as a container in which a plurality of spent fuel assemblies are stored is mounted on the storage frame 16 as a storage object.

6個のエアバック12はそれぞれ搬送台10の底部側に配置されており、各エアバック12にはエア供給源に接続された配管またはホースを介して圧縮空気が供給されるようになっており、圧縮空気の供給によって各エアバック12が膨らむと、各エアバック12の一部から圧縮空気が吹き出し、エアバック12と床20の表面である床面との間に100ミクロン程度の薄い空気膜(エアフィルム)が形成され、各搬送台10が貯蔵架台16、金属キャスク16とともに浮上するようになっている。   Each of the six airbags 12 is disposed on the bottom side of the carriage 10, and compressed air is supplied to each airbag 12 via a pipe or hose connected to an air supply source. When each airbag 12 is inflated by supplying compressed air, the compressed air is blown out from a part of each airbag 12, and a thin air film of about 100 microns is formed between the airbag 12 and the floor surface of the floor 20. (Air film) is formed, and each conveyance stand 10 is levitated together with the storage stand 16 and the metal cask 16.

駆動装置14は、エアを駆動源として、左右一対の駆動輪22を独立に駆動し、左右の駆動輪22の駆動力にしたがって、搬送台10を搬送する搬送機構として構成されている。すなわち、各エアバック12から吹き出す空気によって搬送台12と貯蔵架台16および金属キャスク18が浮上した状態にあるときには、各エアバック12と床面(走行路面)との間の摩擦が小さくなるので、駆動装置14による駆動力が小さくても金属キャスク18のような重量物を搬送することができる。   The drive device 14 is configured as a transport mechanism that independently drives a pair of left and right drive wheels 22 using air as a drive source, and transports the transport base 10 according to the drive force of the left and right drive wheels 22. That is, when the carrier 12, the storage stand 16, and the metal cask 18 are lifted by the air blown from each air bag 12, the friction between each air bag 12 and the floor (traveling road surface) is reduced. Even if the driving force by the driving device 14 is small, a heavy object such as the metal cask 18 can be conveyed.

ここで、例えば、水切り勾配のように、傾斜が設けられている床面での走行を考える。図3に、走行路面に直交するように傾斜がある床面において、金属キャスク18に作用する力と搬送台10に作用する力の関係を示すとともに、床面の傾きを変化させたときの走行距離と変移量との関係を示す。図3に示す特性は、発明者自らが試験を行った結果得られたものであり、傾斜10/1000程度であれば、図3に示す単純なモデルによる走行軌跡を十分な精度で記述できることが明らかになった。すなわち、走行方向に直交する向きに傾斜がある床面を走行する場合には、重量物搬送装置としてのエアパレットは横方向に変位し、直線から離脱し続けることになる。そのため、限られた幅の通路を走行する場合には、操作者がエアパレットの進行方向を適宜是正する必要がある。すなわち、横方向の変位を抑制する機構がエアパレットに設置されていれば進行方向を是正する頻度を低減できることになる。   Here, for example, let us consider traveling on a floor surface provided with an inclination such as a draining slope. FIG. 3 shows the relationship between the force acting on the metal cask 18 and the force acting on the carrier 10 on a floor surface that is inclined so as to be orthogonal to the traveling road surface, and traveling when the inclination of the floor surface is changed. The relationship between distance and displacement is shown. The characteristics shown in FIG. 3 are obtained as a result of the inventor's own tests. If the slope is about 10/1000, the traveling locus based on the simple model shown in FIG. 3 can be described with sufficient accuracy. It was revealed. That is, when traveling on a floor surface that is inclined in a direction orthogonal to the traveling direction, the air pallet as the heavy article transport device is displaced laterally and continues to be detached from the straight line. Therefore, when traveling along a passage having a limited width, it is necessary for an operator to appropriately correct the traveling direction of the air pallet. That is, if a mechanism for suppressing lateral displacement is installed on the air pallet, the frequency of correcting the traveling direction can be reduced.

そこで、本実施形態においては、金属キャスク18の重心位置が傾斜面や凹凸を有する床面を通過する際に、エアパレットの横方向への変位や蛇行を抑制するために、各搬送台10先端側の底部に補助輪24が設けられている。補助輪24は、直進走行時に床面に沿って走行し、床面との間の摩擦として、進行方向(直進)に対する摩擦よりも進行方向に対して直交する方向の摩擦が大きくなるように構成されており、左右一対の駆動輪22のうちいずれかの駆動輪を基準に搬送台10に回転モーメントが生じたときに、この回転モーメントを打ち消すための回転モーメント打消し機構、あるいはこの回転モーメントを抑制するための回転モーメント抑制機構の一要素を構成するようになっている。   Therefore, in the present embodiment, when the center of gravity of the metal cask 18 passes through the inclined surface or the uneven surface, the front end of each conveyance base 10 is used to suppress the lateral displacement and meandering of the air pallet. An auxiliary wheel 24 is provided at the bottom on the side. The auxiliary wheel 24 travels along the floor surface when traveling straight, and the friction between the auxiliary wheel 24 and the floor surface is greater in the direction perpendicular to the traveling direction than in the traveling direction (straight travel). The rotational moment canceling mechanism for canceling the rotational moment when the rotational moment is generated in the carrier 10 with reference to any one of the pair of left and right drive wheels 22, or the rotational moment is It constitutes one element of the rotational moment suppressing mechanism for suppressing.

具体的には、補助輪24は、図4に示すように、動作モードに応じて補助輪24を昇降駆動する昇降駆動機構26を介して搬送台10の底部側に固定されている。昇降駆動機構26は、エアシリンダ28、ばね30、エア配管32、三方弁34を備えて構成されており、エア配管32はエア供給源に接続され、三方弁34はエア配管32の管路途中に設置されている。エアシリンダ28内にはばね30とともにピストン36が挿入されており、ピストン36はピストンロッド38を介して補助輪24に連結されている。補助輪24はピストンロッド38に走行自在に支持されている。ピストン36には、ばね30による弾性力が作用しており、ピストン36は、常時、ばね30によって搬送台10側に引っ張られている。   Specifically, as shown in FIG. 4, the auxiliary wheel 24 is fixed to the bottom side of the transport table 10 through an elevating drive mechanism 26 that elevates and drives the auxiliary wheel 24 according to the operation mode. The elevating drive mechanism 26 includes an air cylinder 28, a spring 30, an air pipe 32, and a three-way valve 34. The air pipe 32 is connected to an air supply source, and the three-way valve 34 is in the middle of the pipe of the air pipe 32. Is installed. A piston 36 is inserted into the air cylinder 28 together with the spring 30, and the piston 36 is connected to the auxiliary wheel 24 via a piston rod 38. The auxiliary wheel 24 is supported by the piston rod 38 so as to be able to run. An elastic force by the spring 30 acts on the piston 36, and the piston 36 is always pulled toward the carrier 10 by the spring 30.

三方弁34はエア配管32を介して空気供給系に接続されており、上昇駆動時あるいは直進時の動作モードとして、エア源からの圧縮空気が三方弁34を介してエアシリンダ28内に導入されると、ピストン36がばね30の弾性力に抗して補助輪24側に押圧され、補助輪24が床面に接触し、補助輪24が床面に沿って走行することになる。すなわち、補助輪24は圧縮空気による圧力が作用した状態で床面上を走行することになる。   The three-way valve 34 is connected to an air supply system via an air pipe 32, and compressed air from an air source is introduced into the air cylinder 28 via the three-way valve 34 as an operation mode during ascending drive or straight travel. Then, the piston 36 is pressed against the auxiliary wheel 24 against the elastic force of the spring 30, the auxiliary wheel 24 comes into contact with the floor surface, and the auxiliary wheel 24 travels along the floor surface. That is, the auxiliary wheel 24 travels on the floor surface in a state where the pressure by the compressed air is applied.

補助輪24が床面に接触した状態で直進走行している過程で、金属キャスク18の重心位置が傾斜面や凹凸がある床面を通過すると、いずれかの駆動輪22を基準に搬送台10には回転モーメントを生じる。しかし、補助輪24は、床面に対する摩擦が直進方向よりも直進に対し直交する方向に対して大きいため、補助輪24の床面に対する摩擦によって回転モーメントを打ち消すことができ、パレットが横方向へ変位したり、蛇行したりするのを防止することができ、直進性を向上させることができ、作業者の操作負荷を軽減することができる。   If the center of gravity of the metal cask 18 passes through a floor surface with an inclined surface or unevenness while the auxiliary wheel 24 is traveling straight with the floor surface in contact with the floor surface, the transport platform 10 is based on one of the drive wheels 22. Produces a rotational moment. However, since the friction with respect to the floor surface of the auxiliary wheel 24 is greater in the direction perpendicular to the straight direction than in the straight direction, the rotational moment can be canceled out by the friction with respect to the floor surface of the auxiliary wheel 24, and the pallet moves in the lateral direction. Displacement or meandering can be prevented, straightness can be improved, and the operator's operation load can be reduced.

一方、動作モードが旋回時または下降駆動時に切り替えられ、三方弁34が排気側に切り替えられると、図4(b)に示すように、エアシリンダ28内の圧縮空気が三方弁34を介して大気中に排出され、ばね30の弾性力によって補助輪24が床面から離脱する。補助輪24が床面から離れた状態で操作者が旋回操作を行うと、補助輪24と床面との間には摩擦が生じないため、エアパレットの右旋回動作あるいは左旋回動作を円滑に行うことができる。   On the other hand, when the operation mode is switched at the time of turning or descending driving and the three-way valve 34 is switched to the exhaust side, the compressed air in the air cylinder 28 passes through the three-way valve 34 to the atmosphere as shown in FIG. The auxiliary wheel 24 is detached from the floor surface by the elastic force of the spring 30. When the operator performs a turning operation with the auxiliary wheel 24 away from the floor surface, no friction is generated between the auxiliary wheel 24 and the floor surface, so that the air pallet can be smoothly turned right or left. Can be done.

エアパレットの旋回動作が終了し、エアパレットの向きが変更されたあとは、三方弁34を切り替え、空気供給系からの圧縮空気をエアシリンダ28に供給し、補助輪24を床面に接触させ、エアパレットを直進走行させる。   After the turning operation of the air pallet is completed and the direction of the air pallet is changed, the three-way valve 34 is switched, compressed air from the air supply system is supplied to the air cylinder 28, and the auxiliary wheel 24 is brought into contact with the floor surface. , Run the air pallet straight.

本実施形態によれば、傾斜面あるいは凹凸のある床面を走行するときにも直進性を向上させることができ、作業者の操作負荷を軽減することができる。またエアパレットの蛇行量から建屋内の通路幅を決める場合には、通路幅の余裕を小さくして合理化したり、床面の平坦度合いを緩やかにしたりすることができる。   According to the present embodiment, straight traveling performance can be improved even when traveling on an inclined surface or an uneven floor surface, and the operator's operation load can be reduced. Further, when the passage width in the building is determined from the meandering amount of the air pallet, the passage width can be reduced and rationalized, or the flatness of the floor surface can be moderated.

次に、凹凸のある床面を走行するときの直進走行性をさらに高めるときの実施形態について説明する。床面に凹凸がある場合、金属キャスク18の重心が床面の低い方へ移動することによって、エアパレット全体が蛇行することが考えられる。エアパレットの直進性を高めるためには、金属キャスク18の重心が凹部に沿って横方向に移動するのを抑制する必要がある。そのためには、エアパレットの進行方向に対して直交する方向の摩擦力を生じるようにすればよいことになる。すなわち、前記実施形態のように、補助輪24を設けることは、傾斜面のみならず、凹凸面を走行するときでも有効であり、補助輪24の接触力(接地力)を高める程、蛇行を抑制することが期待できる。   Next, an embodiment for further improving the straight traveling performance when traveling on an uneven floor surface will be described. When the floor surface is uneven, it is conceivable that the entire air pallet meanders as the center of gravity of the metal cask 18 moves to the lower side of the floor surface. In order to improve the straightness of the air pallet, it is necessary to prevent the center of gravity of the metal cask 18 from moving laterally along the recess. For that purpose, a frictional force in a direction orthogonal to the traveling direction of the air pallet may be generated. That is, as in the above-described embodiment, providing the auxiliary wheel 24 is effective not only when traveling on an uneven surface but also on an uneven surface, and as the contact force (grounding force) of the auxiliary wheel 24 is increased, meandering is performed. It can be expected to suppress.

ただし、補助輪24の接触力が大きいと、直進走行に対してもある程度抵抗になることを考慮すると、床面の凹凸が小さい所を走行する際には、補助輪24の接触力は小さい方がよいことになる。そこで、本実施形態では、床面の凹凸の状態に応じて補助輪24の接触力を調整することとしている。   However, when the contact force of the auxiliary wheel 24 is large, the resistance of the auxiliary wheel 24 is small when traveling in a place where the unevenness of the floor surface is small, considering that it is somewhat resistant to straight traveling. Will be good. Therefore, in the present embodiment, the contact force of the auxiliary wheel 24 is adjusted in accordance with the uneven state of the floor surface.

具体的には、搬送台10に対して駆動輪22の直進走行方向と交差する方向(直交する方向)に作用する加速度を検出する加速度センサ、あるいは搬送台10の変位のうち駆動輪22の直進方向と交差する方向(直交する方向)への変位を検出する変位センサを設け、直進時または上昇駆動時の動作モードにおいては、床面に対する補助輪24の接触力(接地力)を加速度センサの検出出力または変位センサの検出出力に応じて調整できる昇降駆動機構を構成することができる。   Specifically, an acceleration sensor that detects acceleration acting in a direction (orthogonal direction) that intersects the straight traveling direction of the drive wheels 22 with respect to the transport table 10 or straight travel of the drive wheels 22 out of the displacement of the transport table 10. A displacement sensor that detects displacement in a direction that intersects the direction (orthogonal direction) is provided, and in the operation mode during straight traveling or ascending drive, the contact force (grounding force) of the auxiliary wheel 24 with respect to the floor surface is determined by the acceleration sensor. An elevating drive mechanism that can be adjusted according to the detection output or the detection output of the displacement sensor can be configured.

加速度センサまたは変位センサの検出出力に応じてシリンダ28に供給するエアの供給空気圧を調整することで、床面の凹凸が小さい所を走行するときには補助輪24の接触力を小さくし、逆に床面の凹凸が大きい所を走行するときには補助輪24の接触力を大きくすることで、床面の凹凸の状態に応じて直進走行性を高めることができる。   By adjusting the supply air pressure of the air supplied to the cylinder 28 according to the detection output of the acceleration sensor or the displacement sensor, the contact force of the auxiliary wheel 24 is reduced when traveling on a place where the unevenness of the floor surface is small. When traveling on a surface with large unevenness, increasing the contact force of the auxiliary wheel 24 can improve the straight traveling performance according to the unevenness of the floor surface.

なお、前記実施形態においては、エアシリンダ28内にばね30を収納したものについて述べたが、ばね30の他に、エアシリンダ28の外部にばねを設け、このばねによってピストン36を支持する構成を採用することができる。   In the above embodiment, the spring 30 is housed in the air cylinder 28. However, in addition to the spring 30, a spring is provided outside the air cylinder 28, and the piston 36 is supported by the spring. Can be adopted.

本発明の一実施形態を示す重量物搬送装置のブロック構成図である。It is a block block diagram of the heavy article conveyance apparatus which shows one Embodiment of this invention. 本発明に係る重量物搬送装置を用いて金属キャスクを搬送するときの搬送状態を示す側面図である。It is a side view which shows a conveyance state when conveying a metal cask using the heavy article conveyance apparatus which concerns on this invention. 床面の傾きを変化させたときの走行距離と変位量との関係を説明するための特性図である。It is a characteristic view for demonstrating the relationship between the travel distance and displacement amount when changing the inclination of a floor surface. (a)は、搬送台挿入・直進時における補助輪と昇降駆動機構との関係を説明するための側面図、(b)は、旋回時における補助輪と昇降駆動機構との関係を説明するための側面図である。(A) is a side view for explaining the relationship between the auxiliary wheel and the raising / lowering drive mechanism when the carriage is inserted and going straight, and (b) is for explaining the relationship between the auxiliary wheel and the raising / lowering drive mechanism when turning. FIG.

符号の説明Explanation of symbols

10 搬送台
12 エアバック
14 駆動装置
16 貯蔵架台
18 金属キャスク
20 床
22 駆動輪
24 補助輪
26 昇降駆動機構
28 エアシリンダ
34 三方弁
36 ピストン
DESCRIPTION OF SYMBOLS 10 Transfer stand 12 Air bag 14 Drive device 16 Storage stand 18 Metal cask 20 Floor 22 Drive wheel 24 Auxiliary wheel 26 Lift drive mechanism 28 Air cylinder 34 Three-way valve 36 Piston

Claims (6)

貯蔵対象物を収納する容器が搭載された貯蔵架台をその底部側で支持する搬送台と、前記搬送台の底部側に配置されて走行路面に対する圧縮空気の吹出しによって前記走行路面との間に空気膜を形成するエアバックと、前記走行路面上を走行する複数の駆動輪の駆動力に従って前記搬送台を搬送する搬送機構と、前記走行路面のうち傾斜のある走行路面を前記複数の駆動輪が走行するときに前記いずれかの駆動輪を基準に前記搬送台に生じる回転モーメントを打ち消すための回転モーメント打消し機構とを備えてなる重量物搬送装置。 Air is provided between a transport stand that supports a storage stand on which the container for storing the storage object is mounted on the bottom side thereof, and the traveling road surface that is disposed on the bottom side of the transport stand and blows out compressed air to the travel road surface. An air bag that forms a film, a transport mechanism that transports the transport base in accordance with driving forces of a plurality of drive wheels that travel on the travel road surface, and the plurality of drive wheels that travel on an inclined travel road surface among the travel road surfaces. A heavy article transport device comprising a rotational moment canceling mechanism for canceling a rotational moment generated in the transport base with reference to any one of the drive wheels when traveling. 請求項1に記載の重量物搬送装置において、前記回転モーメント打消し機構は、前記搬送台に走行自在に連結されて前記走行路面上を走行する補助輪を備えてなることを特徴とする重量物搬送装置。 2. The heavy article conveying device according to claim 1, wherein the rotational moment canceling mechanism includes an auxiliary wheel that is movably connected to the conveying table and runs on the running road surface. Conveying device. 請求項1に記載の重量物搬送装置において、前記回転モーメント打消し機構は、前記走行路面上を走行する補助輪と、前記搬送台に固定されて前記補助輪を走行自在に支持するとともに、動作モードに応じて前記補助輪を昇降駆動する昇降駆動機構とを備え、前記昇降駆動機構は、上昇駆動時に前記補助輪を前記走行路面から離脱させ、下降駆動時には前記補助輪を前記走行路面に接触させてなることを特徴とする重量物搬送装置。 2. The heavy load transport device according to claim 1, wherein the rotational moment canceling mechanism includes an auxiliary wheel that travels on the traveling road surface, and is fixed to the transport base to support the auxiliary wheel so as to travel freely. An elevating drive mechanism for elevating and driving the auxiliary wheel according to a mode, and the elevating drive mechanism disengages the auxiliary wheel from the traveling road surface during the ascending drive and contacts the auxiliary wheel with the traveling road surface during the descending drive. A heavy article conveying device characterized by being made to do. 請求項1に記載の重量物搬送装置において、前記回転モーメント打消し機構は、前記走行路面上を走行する補助輪と、前記搬送台に固定されて前記補助輪を走行自在に支持するとともに、動作モードに応じて前記補助輪を昇降駆動する昇降駆動機構とを備え、前記昇降駆動機構は、旋回時に前記補助輪を前記走行路面から離脱させ、直進時には前記補助輪を前記走行路面に接触させてなることを特徴とする重量物搬送装置。 2. The heavy load transport device according to claim 1, wherein the rotational moment canceling mechanism includes an auxiliary wheel that travels on the traveling road surface, and is fixed to the transport base to support the auxiliary wheel so as to travel freely. A lifting drive mechanism that drives the auxiliary wheel to move up and down according to a mode, and the lifting drive mechanism causes the auxiliary wheel to separate from the traveling road surface when turning, and causes the auxiliary wheel to contact the traveling road surface when traveling straight. A heavy article conveyance device characterized by comprising: 請求項1に記載の重量物搬送装置において、前記回転モーメント打消し機構は、前記走行路面上を走行する補助輪と、前記搬送台に固定されて前記補助輪を走行自在に支持するとともに、動作モードに応じて前記補助輪を昇降駆動する昇降駆動機構と、前記搬送台に対して前記複数の駆動輪の直進走行方向と交差する方向に作用する加速度を検出する加速度センサとを備え、前記昇降駆動機構は、旋回時に前記補助輪を前記走行路面から離脱させ、直進時には前記補助輪を前記走行路面に接触させするとともに、前記走行路面に対する前記補助輪の接触圧を前記加速度センサの検出出力に応じて調整してなることを特徴とする重量物搬送装置。 2. The heavy load transport device according to claim 1, wherein the rotational moment canceling mechanism includes an auxiliary wheel that travels on the traveling road surface, and is fixed to the transport base to support the auxiliary wheel so as to travel freely. An elevating drive mechanism that elevates and lowers the auxiliary wheel according to a mode; and an acceleration sensor that detects acceleration acting in a direction intersecting a straight traveling direction of the plurality of drive wheels with respect to the transport table. The drive mechanism disengages the auxiliary wheel from the traveling road surface during turning, contacts the auxiliary wheel with the traveling road surface during straight travel, and uses the contact pressure of the auxiliary wheel with respect to the traveling road surface as a detection output of the acceleration sensor. A heavy-duty conveying apparatus characterized by being adjusted accordingly. 請求項1に記載の重量物搬送装置において、前記回転モーメント打消し機構は、前記走行路面上を走行する補助輪と、前記搬送台に固定されて前記補助輪を走行自在に支持するとともに、動作モードに応じて前記補助輪を昇降駆動する昇降駆動機構と、前記搬送台の変位のうち前記複数の駆動輪の直進走行方向と交差する方向への変位を検出する変位センサとを備え、前記昇降駆動機構は、旋回時に前記補助輪を前記走行路面から離脱させ、直進時には前記補助輪を前記走行路面に接触させするとともに、前記走行路面に対する前記補助輪の接触圧を前記変位センサの検出出力に応じて調整してなることを特徴とする重量物搬送装置。 2. The heavy load transport device according to claim 1, wherein the rotational moment canceling mechanism includes an auxiliary wheel that travels on the traveling road surface, and is fixed to the transport base to support the auxiliary wheel so as to travel freely. An elevating drive mechanism that elevates and lowers the auxiliary wheel according to a mode; and a displacement sensor that detects a displacement in a direction intersecting a straight traveling direction of the plurality of drive wheels among the displacement of the transport table, The drive mechanism disengages the auxiliary wheel from the traveling road surface during turning, contacts the auxiliary wheel with the traveling road surface when traveling straight, and uses the contact pressure of the auxiliary wheel against the traveling road surface as a detection output of the displacement sensor. A heavy-duty conveying apparatus characterized by being adjusted accordingly.
JP2006067685A 2006-03-13 2006-03-13 Heavy goods conveyor Expired - Fee Related JP4714604B2 (en)

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CN108146331A (en) * 2017-12-29 2018-06-12 重庆宏雷机械制造有限公司 A kind of vehicle transport support device
JP2020128921A (en) * 2019-02-08 2020-08-27 日立Geニュークリア・エナジー株式会社 Method for carrying used fuel storage container
CN114728747A (en) * 2020-10-30 2022-07-08 东芝三菱电机产业***株式会社 Conveying device

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CN108146331A (en) * 2017-12-29 2018-06-12 重庆宏雷机械制造有限公司 A kind of vehicle transport support device
JP2020128921A (en) * 2019-02-08 2020-08-27 日立Geニュークリア・エナジー株式会社 Method for carrying used fuel storage container
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CN114728747A (en) * 2020-10-30 2022-07-08 东芝三菱电机产业***株式会社 Conveying device

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