JP5421031B2 - Heavy goods cart - Google Patents

Heavy goods cart Download PDF

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JP5421031B2
JP5421031B2 JP2009198088A JP2009198088A JP5421031B2 JP 5421031 B2 JP5421031 B2 JP 5421031B2 JP 2009198088 A JP2009198088 A JP 2009198088A JP 2009198088 A JP2009198088 A JP 2009198088A JP 5421031 B2 JP5421031 B2 JP 5421031B2
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loading platform
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JP2011046336A (en
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雅靖 宮脇
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ユニキャリア株式会社
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Description

本発明は、移動及び換向可能な重量物搬送台車に関する。   The present invention relates to a heavy-duty conveyance cart that can be moved and turned.

従来から、重量物を載置可能な荷台にキャスタと駆動換向輪とが装着され、それらにより移動及び換向可能とされた重量物搬送台車が知られている(例えば、特許文献1参照)。この重量物搬送台車において、キャスタは荷台を支持し、荷台の高さを重量物の重さに拘らず略一定とし、殆どの荷重を受けている。駆動換向輪は、荷台から下方に延出した支持部材にリンク機構を介して昇降自在に支持されており、バネによりリンク機構を介して路面に押し付けられ、輪荷重が掛けられている。   2. Description of the Related Art Conventionally, there is known a heavy-duty conveyance carriage in which a caster and a driving turn wheel are mounted on a loading platform on which a heavy object can be placed, and can be moved and turned by the caster (see, for example, Patent Document 1). . In this heavy goods transport cart, the caster supports the cargo bed, makes the height of the cargo bed substantially constant regardless of the weight of the heavy material, and receives most of the load. The drive diverting wheel is supported by a support member extending downward from the loading platform via a link mechanism so as to be lifted and lowered, and is pressed against the road surface by a spring via the link mechanism, and a wheel load is applied.

重量物は荷台上に設けたリフタ装置により支持される。このリフタ装置が受ける荷重は上記とは別のリンク構造により荷台と駆動換向輪とに分散して掛けられ、重量物の有無及びその重さに応じて駆動換向輪の輪荷重が適宜調整される。これにより、重量物の有無又はその重さに関係なく、駆動換向輪の空転又は横滑りを防ぐことができ、荷台を確実に移動又は換向させることができる。   The heavy object is supported by a lifter device provided on the loading platform. The load received by this lifter device is distributed and applied to the loading platform and the driving diverting wheel by a link structure different from the above, and the wheel load of the driving diverting wheel is adjusted appropriately according to the presence or absence of heavy objects and their weight. Is done. Thereby, regardless of the presence or absence of a heavy object or its weight, idling or skidding of the drive diverting wheel can be prevented, and the loading platform can be reliably moved or diverted.

しかしながら、上記の重量物搬送台車においては、荷台を平荷台又はコンベア台とした場合、重量物を載せ、又は降ろす際にリフタ装置が邪魔になり、作業し難いことがあった。   However, in the heavy-duty conveyance cart described above, when the loading platform is a flat loading platform or a conveyor platform, the lifter device becomes an obstacle when loading or unloading heavy loads, and it may be difficult to work.

特開2006−103514号公報JP 2006-103514 A

本発明は、上記の従来の問題を解決するためになされたものであり、重量物の有無又はその重さに拘らず、荷台の移動又は換向を確実に行うことができ、重量物を荷台に載せ又は降ろし易い重量物搬送台車を提供することを目的とする。   The present invention has been made in order to solve the above-described conventional problems, and it is possible to reliably move or turn the loading platform regardless of the presence or absence of a heavy load, and to load the heavy load. An object of the present invention is to provide a heavy-duty conveying cart that can be easily put on or taken down.

上記目的を達成するために請求項1に記載の発明は、重量物を載置可能な荷台がキャスタと駆動換向輪とにより荷重を分散して支持され、それらキャスタと駆動換向輪とにより移動及び換向可能とされた重量物搬送台車において、前記荷台上の重量物の有無又はその重さを検知する検知手段と、前記検知手段による検知結果に応じて前記駆動換向輪の輪荷重を調整する調整機構と、を備えており、前記調整機構は前記荷台の下方に設けられており、前記荷台から下方に延出した支持部材にシーソ回動自在に支持され、前記駆動換向輪を一端部に支持するリンクアームと、無負荷時に必要な前記駆動換向輪の輪荷重を発生させるために、前記支持部材に取り付けられた台座と前記リンクアームの他端部との間に設けられ、前記他端部を上昇付勢するスプリング又はバネと、前記台座と前記他端部との間に設けられ、前記検知手段による検知結果に応じて前記リンクアームの他端部を昇降作動させ、前記駆動換向輪の輪荷重を調整するシリンダとを備え、該シリンダのロッドには前記他端部を上昇付勢する弾性体が設けられていることを特徴とする。 In order to achieve the above object, according to the first aspect of the present invention, a load carrier on which a heavy object can be placed is supported by a caster and a drive diverting wheel in such a manner that the load is distributed. In a heavy-duty transport carriage that can be moved and turned, a detecting means for detecting the presence or weight of a heavy article on the loading platform, and a wheel load of the drive turning wheel according to a detection result by the detecting means equipped with an adjustment mechanism for adjusting, the adjusting mechanism, the loading platform of the provided below, seesaw rotatably supported by a supporting member extending downwardly from said loading platform, said drive換向A link arm that supports the wheel at one end, and a pedestal attached to the support member and the other end of the link arm in order to generate a wheel load of the drive diverting wheel that is required when there is no load. Provided with the other end raised Is provided between the spring or the spring and the pedestal and the other end, and the other end of the link arm is moved up and down according to the detection result of the detection means, and the wheel load of the driving diverting wheel is increased. And a cylinder to be adjusted, and a rod of the cylinder is provided with an elastic body that lifts and biases the other end.

また、請求項2に記載の発明は、重量物を載置可能な荷台がキャスタと駆動換向輪とにより荷重を分散して支持され、それらキャスタと駆動換向輪とにより移動及び換向可能とされた重量物搬送台車において、前記荷台上の重量物の有無又はその重さを検知する検知手段と、前記検知手段による検知結果に応じて前記駆動換向輪の輪荷重を調整する調整機構と、を備えており、前記調整機構は、前記荷台の下方に設けられており、前記荷台から下方に延出した支持部材にシーソ回動自在に支持され、前記駆動換向輪を一端部に支持するリンクアームと、無負荷時に必要な前記駆動換向輪の輪荷重を発生させるために、前記支持部材に取り付けられた台座と前記リンクアームの他端部との間に設けられ、前記他端部を上昇付勢するスプリング又はバネと、前記他端部の上面に一端が起倒自在に連結され、他端が前記他端部に引き寄せる弾性体に繋がっているリンク部材と、前記台座と前記リンク部材の前記一端及び他端の間の位置との間に設けられ、前記検知手段による検知結果に応じて前記リンクアームの他端部を昇降作動させることにより前記駆動換向輪の輪荷重を調整するシリンダとを備えており、前記シリンダのロッドは昇降に伴って前記リンク部材を摺動するように構成されていることを特徴とする。 In the invention described in claim 2, a load bed on which a heavy object can be placed is supported by a caster and a drive diverting wheel in such a manner that the load is distributed, and can be moved and diverted by the caster and the drive diverting wheel. In the heavy-duty carriage, the detection means for detecting the presence or the weight of the heavy load on the cargo bed, and the adjustment mechanism for adjusting the wheel load of the driving diverting wheel according to the detection result by the detection means The adjustment mechanism is provided below the loading platform, is supported by a support member extending downward from the loading platform so that the seesaw can freely rotate, and the drive diverting wheel is at one end. In order to generate a wheel load of the link arm to be supported and the drive diverting wheel necessary when there is no load , the link arm is provided between a base attached to the support member and the other end of the link arm, and the other A spring or an upward biasing end A spring, one end on the upper surface of the other end is connected freely raised or lowered, and the link member and the other end is connected to the elastic body to draw the other end, the one end and the other end of the link member and the pedestal It is provided between the position between, and a cylinder for adjusting the wheel load of the driven換向wheels by lifting actuating the other end of the link arm in accordance with the detection result by said detecting means The cylinder rod is configured to slide on the link member as it moves up and down.

本発明によれば、重量物の有無又はその重さに応じて駆動換向輪の輪荷重が調整されるので、重量物の有無又はその重さに拘らず、駆動換向輪の空転又は横滑りを防止することができ、荷台の移動又は換向を確実に行うことができる。また、輪荷重を調整する調整機構が荷台の下方に在るので、重量物を荷台に載せ又は降ろす作業がし易い。 According to the present invention , since the wheel load of the drive diverting wheel is adjusted in accordance with the presence or absence of a heavy load, or the weight thereof, the drive diverting wheel slips or skids regardless of the presence or absence of a heavy load. Can be prevented, and the loading platform can be reliably moved or turned. In addition, since an adjustment mechanism for adjusting the wheel load is located below the loading platform, it is easy to load or unload heavy objects on the loading platform.

また、弾性体により駆動換向輪の輪荷重を発生、調整することができるので、駆動換向輪の空転又は横滑り防止効果が高まる。 Further, since the wheel load of the driving diverting wheel can be generated and adjusted by the elastic body , the effect of preventing the idling or skidding of the driving diverting wheel is enhanced.

本発明の一実施形態に係る重量物搬送台車の積載状態の側面図。The side view of the loading state of the heavy-duty conveyance trolley | bogie which concerns on one Embodiment of this invention. 上記重量物搬送台車の駆動換向輪装置及びキャリア装置部分の拡大側面図。FIG. 3 is an enlarged side view of a drive turning wheel device and a carrier device portion of the heavy goods transport carriage. 上記駆動換向輪装置の正面方向からの斜視図。The perspective view from the front direction of the said drive diversion wheel apparatus. 上記駆動換向輪装置の背面方向からの斜視図。The perspective view from the back direction of the above-mentioned drive turning wheel device. 上記駆動換向輪装置の動作を説明するための側面図。The side view for demonstrating operation | movement of the said drive turning wheel apparatus. 上記台車の電気的ブロック図。The electric block diagram of the said trolley | bogie. 上記実施形態の一変形例に係る重量物搬送台車の駆動換向輪装置部分の側面図。The side view of the drive turning wheel apparatus part of the heavy-duty conveyance trolley | bogie which concerns on the modification of the said embodiment. 上記駆動換向輪装置の動作を説明するための側面図。The side view for demonstrating operation | movement of the said drive turning wheel apparatus.

以下、本発明の一実施形態に係る重量物搬送台車(以下、台車という)について図1〜図6を参照して説明する。図1は、本実施形態の台車の構成を示す。この台車1は、重量物2を載置可能な荷台3と、荷台3を支持し、荷台3の荷重を受けるキャスタ装置4と、荷台3に装着される駆動換向輪装置5とを備え、これらキャスタ装置4と駆動換向輪装置5とにより移動及び換向可能とされている。   Hereinafter, a heavy-duty conveyance cart (hereinafter referred to as a cart) according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the configuration of the carriage of this embodiment. The cart 1 includes a loading platform 3 on which a heavy object 2 can be placed, a caster device 4 that supports the loading platform 3 and receives a load on the loading platform 3, and a drive turning wheel device 5 that is mounted on the loading platform 3. The caster device 4 and the drive turning wheel device 5 can be moved and turned.

荷台3は例えば平面視で略矩形の平荷台とするが、コンベア台等であってもよい。キャスタ装置4は遊輪であるキャスタ40を有し、荷台3を略水平に保って支持することできるように4台、配置されている(2台は図示せず)。これらのキャスタ装置4は荷台3の高さを重量物2の重さに拘らず略一定とする。駆動換向輪装置5は回転駆動する換向自在な駆動換向輪50を有し、図中左右端部に1台ずつ配置されている。キャスタ装置40及び駆動換向輪装置5の台数は上記に限定されない。   The loading platform 3 is, for example, a flat rectangular loading platform in plan view, but may be a conveyor platform or the like. The caster device 4 includes a caster 40 that is a free wheel, and four units are arranged so that the loading platform 3 can be supported substantially horizontally (two are not shown). These caster devices 4 make the height of the loading platform 3 substantially constant regardless of the weight of the heavy load 2. The drive turning wheel device 5 includes a turnable drive turning wheel 50 that is rotationally driven, and one drive turning wheel device is disposed at each of the left and right ends in the figure. The number of caster devices 40 and drive turning wheel devices 5 is not limited to the above.

また、台車1は、荷台3の上の重量物2の有無及びその重さを検知する検知センサ6(検知手段)と、駆動換向輪50に輪荷重を発生させると共に、検知センサ6による検知結果に応じてその輪荷重をキャスタ40との間で調整する調整機構7とを備える。この調整機構7は荷台3の下方に設けられる。   In addition, the cart 1 generates a wheel load on the detection sensor 6 (detection means) that detects the presence and weight of the heavy object 2 on the loading platform 3 and its weight, and the detection by the detection sensor 6. An adjustment mechanism 7 that adjusts the wheel load with the caster 40 according to the result is provided. The adjustment mechanism 7 is provided below the loading platform 3.

検知センサ6はロードセルにより構成することができ、荷台3上面に設けられた重量物載置板30の下に配置されている。調整機構7は駆動換向輪50の輪荷重の発生により荷台3の荷重をキャスタ40と駆動換向輪50とに分散して掛け、これにより、荷台3がキャスタ40と駆動換向輪50とにより支持されるようにする。また、調整機構7は駆動換向輪50の輪荷重の調整により駆動換向輪50の接地荷重を調整し、その空転を防ぐ。   The detection sensor 6 can be constituted by a load cell, and is disposed under the heavy article placement plate 30 provided on the upper surface of the loading platform 3. The adjustment mechanism 7 applies the load of the loading platform 3 to the caster 40 and the driving switching wheel 50 by generating the wheel load of the driving switching wheel 50, whereby the loading platform 3 is connected to the caster 40 and the driving switching wheel 50. To be supported by. Further, the adjusting mechanism 7 adjusts the ground load of the driving diverting wheel 50 by adjusting the wheel load of the driving diverting wheel 50, and prevents the idling thereof.

図2〜図4は、駆動換向輪装置5及び調整機構7の構成を示す。駆動換向輪装置5は、上述の駆動換向輪50と、駆動換向輪50の車輪軸(図示せず)を回転自在に支持する軸受部材51と、軸受部材51に取り付けられ、上記車輪軸を回転駆動する車輪軸回転装置52と、駆動換向輪50、軸受部材51及び車輪軸回転装置52を覆う本体53とを有する。   2 to 4 show the configuration of the drive turning wheel device 5 and the adjustment mechanism 7. The drive turning wheel device 5 is attached to the above-described drive turning wheel 50, a bearing member 51 that rotatably supports a wheel shaft (not shown) of the driving turning wheel 50, and the bearing member 51. A wheel shaft rotating device 52 that rotates the shaft, and a main body 53 that covers the drive diverting wheel 50, the bearing member 51, and the wheel shaft rotating device 52 are provided.

また、駆動換向輪装置5は、軸受部材51から上方に延伸し、本体53の上面を貫通した縦軸54と、縦軸54の上部に固定された従動歯車55と、従動歯車55に巻かれる無端のチェーン56と、チェーン56が掛け渡される駆動歯車57と、本体53に取り付けられ、駆動歯車57を回転させる歯車回転装置58と、チェーン56が掛け渡され、チェーン56のテンションを所定値に保つテンション歯車59とを有する。本体53は縦軸54に沿って上下に摺動しないように動きが規制されている。駆動歯車57の回転駆動力はチェーン56により従動歯車55に伝達し、これにより、縦軸54、そして軸受部材51が従動して回転し、結果として、駆動換向輪50が換向する。   The drive diverter device 5 extends upward from the bearing member 51 and passes through the upper surface of the main body 53, the driven gear 55 fixed to the upper portion of the vertical axis 54, and the driven gear 55. An endless chain 56, a drive gear 57 over which the chain 56 is stretched, a gear rotating device 58 attached to the main body 53 and rotating the drive gear 57, and a chain 56 are spanned, and the tension of the chain 56 is set to a predetermined value. And a tension gear 59 for maintaining the tension. The movement of the main body 53 is restricted so as not to slide up and down along the vertical axis 54. The rotational driving force of the drive gear 57 is transmitted to the driven gear 55 by the chain 56, whereby the vertical axis 54 and the bearing member 51 are driven and rotated, and as a result, the drive diverting wheel 50 is diverted.

ここで、調整機構7が取り付けられる荷台3部分の構成を説明する。この部分では、荷台3下面から略板状の支持部材31が下方に延出し、支持部材31の前面からは1対の突出片32が突出し、対面している。また、支持部材31の上部にはその前面から背面に貫通した開口33が形成され、支持部材31背面の開口33よりも下方の部位には台座34が突設されている。   Here, the structure of the loading platform 3 portion to which the adjusting mechanism 7 is attached will be described. In this portion, a substantially plate-like support member 31 extends downward from the lower surface of the loading platform 3, and a pair of protruding pieces 32 protrude from the front surface of the support member 31 and face each other. Further, an opening 33 penetrating from the front surface to the back surface is formed in the upper portion of the support member 31, and a pedestal 34 projects from a portion below the opening 33 on the back surface of the support member 31.

調整機構7は、突出片32にシーソ回動自在に支持され、駆動換向輪装置5の本体53を一端部に回動自在に支持するリンクアーム(以下、アームという)70と、駆動換向輪50の輪荷重を発生させるためにアーム70の他端部を上昇付勢するバネ71と、アーム70の他端部を昇降作動させ、駆動換向輪50の輪荷重を調整するシリンダ72とを有する。この輪荷重調整は検知センサ6による検知結果に応じてなされる。バネ71は、無負荷時、すなわち、重量物2の未積載時に必要な駆動換向輪50の輪荷重を発生させるものである。   The adjustment mechanism 7 is supported by the projecting piece 32 so as to freely rotate the seesaw, and a link arm (hereinafter referred to as an arm) 70 that rotatably supports the main body 53 of the drive diverting wheel device 5 at one end portion. A spring 71 that lifts and biases the other end of the arm 70 to generate a wheel load of the wheel 50; and a cylinder 72 that moves the other end of the arm 70 up and down to adjust the wheel load of the drive diverting wheel 50; Have This wheel load adjustment is performed according to the detection result by the detection sensor 6. The spring 71 generates a wheel load of the driving diverting wheel 50 that is necessary when there is no load, that is, when the heavy load 2 is not loaded.

アーム70の下方にはアーム70と略平行なアーム73が配設され、アーム73の一端部は本体53を回動自在に支持し、他端部は突出片32に回動自在に連結されている。アーム70、73は各突出片32に1組ずつ設けられ、アーム70もアーム73も相対向する位置に配置されており、これらは本体53を上下に昇降自在とする。   An arm 73 that is substantially parallel to the arm 70 is disposed below the arm 70, one end of the arm 73 rotatably supports the main body 53, and the other end is rotatably connected to the protruding piece 32. Yes. One set of arms 70 and 73 is provided for each projecting piece 32, and both the arm 70 and the arm 73 are disposed at opposing positions, and these allow the main body 53 to be moved up and down.

相対向するアーム70はシャフト74により連結され、シャフト74には可動片75(アーム70の他端部)が一体形成されている。シャフト74は支持部材3の開口33前方に位置し、可動片75は支持部材3の開口33から背面方向に突出している。可動片75は板状部材75aの上面に補強用のリブ75bを設けて成り、このリブ75bがシャフト74と一体形成されている。支持部材31の台座34は可動片75の略鉛直下方に在り、それらの間にバネ71及びシリンダ72が取り付けられている。バネ71は可動片75を上方に付勢する。シリンダ72のロッド72aは可動片75と連結し、可動片75の上下方向の位置を調整する。   Opposing arms 70 are connected by a shaft 74, and a movable piece 75 (the other end of the arm 70) is integrally formed on the shaft 74. The shaft 74 is positioned in front of the opening 33 of the support member 3, and the movable piece 75 protrudes from the opening 33 of the support member 3 in the back direction. The movable piece 75 is formed by providing a reinforcing rib 75 b on the upper surface of the plate-like member 75 a, and the rib 75 b is integrally formed with the shaft 74. The pedestal 34 of the support member 31 is substantially vertically below the movable piece 75, and a spring 71 and a cylinder 72 are attached between them. The spring 71 biases the movable piece 75 upward. The rod 72a of the cylinder 72 is connected to the movable piece 75 and adjusts the vertical position of the movable piece 75.

ロッド72aと可動片75との間には、駆動換向輪50の輪荷重を発生、調整するためのバネ76(弾性体)が設けられている。バネ76は、可動片75の下面が上方に凹み形成された収納庫75cに収納されており、可動片75を上昇付勢する。   Between the rod 72a and the movable piece 75, a spring 76 (elastic body) for generating and adjusting the wheel load of the drive diverting wheel 50 is provided. The spring 76 is housed in a storage 75 c in which the lower surface of the movable piece 75 is recessed upward and urges the movable piece 75 upward.

図に示すように、重量物2が荷台3に未積載の場合、可動片75はバネ71、76の付勢力により押し上げられ、アーム70はシーソ回動し、駆動換向輪装置5が路面に押し付けられ、駆動換向輪50に輪荷重が発生している。この輪荷重は、未積載の状態で荷台3が移動する際に駆動換向輪50の空転及び横滑りを防ぐことが可能な程度とし、この値に応じてバネ71、76の付勢力が予め決められている。未積載の場合、シリンダ72のロッド72aは自由状態とする。未積載状態で可動片75は例えば略水平とされる。   As shown in the figure, when the heavy object 2 is not loaded on the loading platform 3, the movable piece 75 is pushed up by the urging force of the springs 71 and 76, the arm 70 is rotated by the seesaw, and the drive turning wheel device 5 is placed on the road surface. The wheel load is generated in the driving diverting wheel 50 by being pressed. The wheel load is set to such an extent that the driving turn wheel 50 can be prevented from slipping and skidding when the loading platform 3 moves in an unloaded state, and the biasing force of the springs 71 and 76 is determined in advance according to this value. It has been. When not loaded, the rod 72a of the cylinder 72 is in a free state. The movable piece 75 is, for example, substantially horizontal in the unloaded state.

図5は、荷台3に重量物2が積載された状態を示す。この状態では、シリンダ72のロッド72aはその伸縮量が所定値に保持される駆動状態となる。ロッド72aは所定量だけ伸び、この伸びと伸びでバネ76を圧縮した反力とバネ71の付勢力とにより可動片75は上述の未積載の場合よりも上昇する。これにより、アーム70はシーソ回動し、未積載状態と比べ、駆動換向輪50の輪荷重がより多くなる。   FIG. 5 shows a state in which the heavy object 2 is loaded on the loading platform 3. In this state, the rod 72a of the cylinder 72 is in a driving state in which the expansion / contraction amount is held at a predetermined value. The rod 72a is extended by a predetermined amount, and the movable piece 75 is raised as compared with the above unloaded state by the reaction force obtained by compressing the spring 76 by this extension and extension and the urging force of the spring 71. As a result, the arm 70 rotates in a seesaw, and the wheel load of the drive diverting wheel 50 is increased compared to the unloaded state.

図6は、台車1の電気的構成を示す。台車1は、ユーザにより操作される操作部8と、操作部8から出力される操作信号に基づいて車輪軸回転装置52及び歯車回転装置58の動作制御を行う制御部9とを有する。操作部8はボタン、スイッチ、タッチパネル等により構成することができる。制御部9はマイクロプロセッサ等により構成され、車輪軸回転装置52の動作制御により駆動換向輪50の回転速度を制御し、歯車回転装置58の動作制御により駆動歯車57の回転数又は回転速度を制御し、これにより、駆動換向輪50の換向角度又は換向速度を制御する。   FIG. 6 shows the electrical configuration of the carriage 1. The carriage 1 includes an operation unit 8 operated by a user, and a control unit 9 that performs operation control of the wheel shaft rotation device 52 and the gear rotation device 58 based on an operation signal output from the operation unit 8. The operation unit 8 can be configured by buttons, switches, touch panels, and the like. The control unit 9 is constituted by a microprocessor or the like, and controls the rotation speed of the drive diverting wheel 50 by operation control of the wheel shaft rotation device 52, and controls the rotation speed or rotation speed of the drive gear 57 by operation control of the gear rotation device 58. Thus, the turning angle or turning speed of the drive turning wheel 50 is controlled.

また、制御部9は検知センサ6による検知値が所定値以上又は未満であるかを判別し、これにより、重量物2の積載の有無を検知し、未積載と検知した場合にはシリンダ72のロッド72aを自由状態とする。制御部9は重量物2が積載状態であると検知した場合にはシリンダ72を駆動状態とすると共に、重量物2の重量を検知し、その重量に応じた量だけロッド72aを伸縮し、その状態で保持する。   Further, the control unit 9 determines whether the detection value by the detection sensor 6 is greater than or less than a predetermined value, thereby detecting whether or not the heavy object 2 is loaded. The rod 72a is in a free state. When the control unit 9 detects that the heavy object 2 is in a loaded state, the control unit 9 sets the cylinder 72 in a driving state, detects the weight of the heavy object 2, and expands and contracts the rod 72a by an amount corresponding to the weight. Hold in state.

上記のような本実施形態の台車1においては、重量物2の有無又はその重さに応じて駆動換向輪50の輪荷重が調整されるので、重量物2の有無又はその重さに拘らず、駆動換向輪50の空転又は横滑りを防止することができ、荷台3の移動又は換向を確実に行うことができる。また、輪荷重を調整する調整機構7が荷台3の下方に在るので、重量物2を荷台3に載せ又は荷台3から降ろす作業がし易い。   In the cart 1 of the present embodiment as described above, the wheel load of the drive diverting wheel 50 is adjusted according to the presence or absence of the heavy object 2 or the weight thereof. Accordingly, it is possible to prevent the drive turning wheel 50 from slipping or slipping, and the loading platform 3 can be reliably moved or turned. Further, since the adjusting mechanism 7 for adjusting the wheel load is located below the loading platform 3, it is easy to put the heavy load 2 on the loading platform 3 or to drop it from the loading platform 3.

また、バネ76により駆動換向輪50の輪荷重を発生、調整することができるので、駆動換向輪50の空転又は横滑り防止効果が高まる。また、駆動換向輪50からシリンダ7に伝わる振動を、それらの間に設けられたバネ76により吸収することができるので、シリンダ7の故障を抑制することができる。   Further, since the wheel load of the driving diverting wheel 50 can be generated and adjusted by the spring 76, the effect of preventing the idling or skidding of the driving diverting wheel 50 is enhanced. Further, since vibration transmitted from the drive diverting wheel 50 to the cylinder 7 can be absorbed by the spring 76 provided therebetween, failure of the cylinder 7 can be suppressed.

次に、上記実施形態の一変形例に係る台車1について図7及び図8を参照して説明する。図7は、本変形例の台車1の調整機構7の構成を示す。図示の状態は重量物2を荷台3に未積載の状態である。本変形例の調整機構7は、可動片75の上面に起倒自在に連結されたリンク部材77を有し、リンク部材77の先端部にはリンク部材77を可動片75に引き寄せるバネ76が係止されており、リンク部材77は、可動片75から突き出たロッド72aにより下方から押し上げ支持される。   Next, a cart 1 according to a modification of the above embodiment will be described with reference to FIGS. 7 and 8. FIG. 7 shows a configuration of the adjusting mechanism 7 of the cart 1 according to this modification. The illustrated state is a state in which the heavy object 2 is not loaded on the loading platform 3. The adjustment mechanism 7 of this modification has a link member 77 connected to the upper surface of the movable piece 75 so that it can be tilted up and down, and a spring 76 that draws the link member 77 toward the movable piece 75 is engaged at the tip of the link member 77. The link member 77 is pushed up and supported from below by a rod 72a protruding from the movable piece 75.

バネ76は、引っ張り付勢力を有するものであり、可動片75の下側に形成された収納庫75cに収納され、係止されている。バネ76は、シリンダ72を挟んで、可動片75とリンク部材77の連結部位とは反対側に配置されている。ロッド72aは、可動片75に形成された孔75dから突き出てリンク部材77に連接している。ロッド72a先端のリンク部材77との連接部分はロッド72aの昇降に伴ってリンク部材77を摺動するように構成されており、ロッド72aが水平方向に曲がらないようにされている。   The spring 76 has a tensile biasing force, and is stored and locked in a storage 75 c formed on the lower side of the movable piece 75. The spring 76 is disposed on the opposite side of the connecting portion between the movable piece 75 and the link member 77 with the cylinder 72 interposed therebetween. The rod 72 a protrudes from a hole 75 d formed in the movable piece 75 and is connected to the link member 77. The connecting portion with the link member 77 at the tip of the rod 72a is configured to slide on the link member 77 as the rod 72a moves up and down so that the rod 72a does not bend in the horizontal direction.

図8は、荷台3に重量物2が積載された状態を示す。この状態では、ロッド72aは未積載時よりも所定量だけ伸び、リンク部材77が押し上げられ、可動片75がバネ76により吊り上げられている。これにより、アーム70はシーソ回動し、未積載状態と比べ、駆動換向輪50の輪荷重が多くされている。駆動換向輪50からアーム70、リンク部材77、そしてシリンダ72に伝わる振動はバネ76により吸収される。   FIG. 8 shows a state in which the heavy object 2 is loaded on the loading platform 3. In this state, the rod 72 a extends by a predetermined amount as compared with the unloaded state, the link member 77 is pushed up, and the movable piece 75 is lifted by the spring 76. As a result, the arm 70 rotates in a seesaw, and the wheel load of the drive diverting wheel 50 is increased compared to the unloaded state. The vibration transmitted from the drive turning wheel 50 to the arm 70, the link member 77, and the cylinder 72 is absorbed by the spring 76.

本変形例の台車1においては、バネ76とその収納庫75cが可動片75の下側に設けられているので、それらが可動片75の上側にある上記実施形態と比べ、可動片75とその上方に在る荷台3との間を狭くすることができ、車高を下げることができる。このため、車体の設計自由度が高まる。本変形例においても、上記実施形態と同等の効果を奏することができる。   In the cart 1 of this modification, the spring 76 and its storage 75c are provided on the lower side of the movable piece 75, so that the movable piece 75 and its movable piece 75 are compared with the embodiment in which they are above the movable piece 75. It is possible to narrow the space between the cargo bed 3 located above and the vehicle height. For this reason, the design freedom of a vehicle body increases. Also in this modification, the same effect as the above-mentioned embodiment can be produced.

なお、本発明は、上記の実施形態の構成に限定されるものでなく、使用目的に応じ、様々な変形が可能である。例えば、検知センサ6は、荷台3に設置され重量物2の有無を検知する在荷センサにより、又は、輪荷重調整前のキャスタ40若しくは駆動換向輪50の輪荷重を検知する輪荷重検知センサと、その検知結果から重量物2の重量を算出するマイクロプロセッサとにより構成することもできる。キャスタ40を回動自在に支持する支持部材に歪みゲージを取り付け、この歪みゲージにより、重量物2の重量に応じた支持部材の歪みを測定し、その測定結果を基に重量物2の重量を算出してもよい。   In addition, this invention is not limited to the structure of said embodiment, A various deformation | transformation is possible according to a use purpose. For example, the detection sensor 6 is a wheel load detection sensor that detects the wheel load of the caster 40 or the driving diverting wheel 50 before adjusting the wheel load by a load sensor that is installed on the loading platform 3 and detects the presence or absence of the heavy load 2. And a microprocessor that calculates the weight of the heavy object 2 from the detection result. A strain gauge is attached to a support member that rotatably supports the caster 40, and the strain of the support member corresponding to the weight of the heavy object 2 is measured by the strain gauge, and the weight of the heavy object 2 is calculated based on the measurement result. It may be calculated.

また、バネ71の替わりとしてスプリングが設けられていても、また、バネ76の替わりとしてスプリング又はウレタン製緩衝材等が用いられていてもよい。また、操作部8の替わりとして、路面上の誘導路を検出する誘導センサが設けられ、その検出結果に基づき、制御部9により荷台2の移動及び換向が自動制御されても構わない。   Further, a spring may be provided in place of the spring 71, or a spring or a cushioning material made of urethane may be used in place of the spring 76. Further, instead of the operation unit 8, a guidance sensor for detecting a guidance path on the road surface may be provided, and based on the detection result, movement and turning of the loading platform 2 may be automatically controlled.

1 重量物搬送台車
2 重量物
3 荷台
30 支持部材
4 キャスタ装置
40 キャスタ
5 駆動換向輪装置
50 駆動換向輪
6 検知センサ(検知手段)
7 調整機構
70 リンクアーム
71 バネ
72 シリンダ
76 バネ(弾性体)
DESCRIPTION OF SYMBOLS 1 Heavy goods conveyance trolley 2 Heavy goods 3 Loading platform 30 Support member 4 Caster apparatus 40 Caster 5 Drive diverting wheel apparatus 50 Driving diverting wheel 6 Detection sensor (detection means)
7 Adjustment mechanism 70 Link arm 71 Spring 72 Cylinder 76 Spring (elastic body)

Claims (2)

重量物を載置可能な荷台がキャスタと駆動換向輪とにより荷重を分散して支持され、それらキャスタと駆動換向輪とにより移動及び換向可能とされた重量物搬送台車において、前記荷台上の重量物の有無又はその重さを検知する検知手段と、前記検知手段による検知結果に応じて前記駆動換向輪の輪荷重を調整する調整機構と、を備えており
前記調整機構は前記荷台の下方に設けられており、前記荷台から下方に延出した支持部材にシーソ回動自在に支持され、前記駆動換向輪を一端部に支持するリンクアームと、無負荷時に必要な前記駆動換向輪の輪荷重を発生させるために、前記支持部材に取り付けられた台座と前記リンクアームの他端部との間に設けられ、前記他端部を上昇付勢するスプリング又はバネと、前記台座と前記他端部との間に設けられ、前記検知手段による検知結果に応じて前記リンクアームの他端部を昇降作動させ、前記駆動換向輪の輪荷重を調整するシリンダとを備え、該シリンダのロッドには前記他端部を上昇付勢する弾性体が設けられていることを特徴とする重量物搬送台車。
In the heavy-duty conveyance carriage in which a load platform on which a heavy object can be placed is supported by a caster and a drive diverting wheel in a distributed manner and can be moved and diverted by the caster and the drive diverting wheel. detection means for detecting the presence or weight of the heavy article above, and and an adjusting mechanism for adjusting the wheel load of the drive換向wheels according to the detection result by said detecting means,
The adjusting mechanism, the loading platform of the provided below, seesaw rotatably supported by a supporting member extending downwardly from said loading platform, and the link arm that supports the drive換向wheel at one end, no In order to generate the wheel load of the drive diverting wheel necessary for loading, it is provided between the pedestal attached to the support member and the other end portion of the link arm, and lifts and biases the other end portion. A spring or a spring is provided between the pedestal and the other end, and the other end of the link arm is moved up and down according to the detection result of the detection means to adjust the wheel load of the drive diverting wheel. A heavy-duty conveyance carriage , wherein the cylinder rod is provided with an elastic body that lifts and biases the other end .
重量物を載置可能な荷台がキャスタと駆動換向輪とにより荷重を分散して支持され、それらキャスタと駆動換向輪とにより移動及び換向可能とされた重量物搬送台車において、前記荷台上の重量物の有無又はその重さを検知する検知手段と、前記検知手段による検知結果に応じて前記駆動換向輪の輪荷重を調整する調整機構と、を備えており
前記調整機構は前記荷台の下方に設けられており、前記荷台から下方に延出した支持部材にシーソ回動自在に支持され、前記駆動換向輪を一端部に支持するリンクアームと、無負荷時に必要な前記駆動換向輪の輪荷重を発生させるために、前記支持部材に取り付けられた台座と前記リンクアームの他端部との間に設けられ、前記他端部を上昇付勢するスプリング又はバネと、前記他端部の上面に一端が起倒自在に連結され、他端が前記他端部に引き寄せる弾性体に繋がっているリンク部材と、前記台座と前記リンク部材の前記一端及び他端の間の位置との間に設けられ、前記検知手段による検知結果に応じて前記リンクアームの他端部を昇降作動させることにより前記駆動換向輪の輪荷重を調整するシリンダとを備えており、前記シリンダのロッドは昇降に伴って前記リンク部材を摺動するように構成されていることを特徴とする重量物搬送台車。
In the heavy-duty conveyance carriage in which a load platform on which a heavy object can be placed is supported by a caster and a drive diverting wheel in a distributed manner and can be moved and diverted by the caster and the drive diverting wheel. detection means for detecting the presence or weight of the heavy article above, and and an adjusting mechanism for adjusting the wheel load of the drive換向wheels according to the detection result by said detecting means,
The adjusting mechanism, the loading platform of the provided below, seesaw rotatably supported by a supporting member extending downwardly from said loading platform, and the link arm that supports the drive換向wheel at one end, no In order to generate the wheel load of the drive diverting wheel necessary for loading, it is provided between the pedestal attached to the support member and the other end portion of the link arm, and lifts and biases the other end portion. A spring or a spring, a link member having one end connected to the upper surface of the other end portion so as to be tiltable and the other end connected to an elastic body that draws to the other end portion, the pedestal and the one end of the link member; A cylinder that is provided between the other ends and adjusts the wheel load of the drive diverting wheel by moving the other end of the link arm up and down according to the detection result of the detection means. The cylinder Heavy transport carriage rod, characterized in that it is configured to slide the link member with the elevator.
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