JP3833675B2 - Maximum lift positioning device for load receiving platform in load receiving platform lifting device - Google Patents

Maximum lift positioning device for load receiving platform in load receiving platform lifting device Download PDF

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JP3833675B2
JP3833675B2 JP2004179730A JP2004179730A JP3833675B2 JP 3833675 B2 JP3833675 B2 JP 3833675B2 JP 2004179730 A JP2004179730 A JP 2004179730A JP 2004179730 A JP2004179730 A JP 2004179730A JP 3833675 B2 JP3833675 B2 JP 3833675B2
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slider
load receiving
receiving platform
highest
positioning device
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JP2006001407A (en
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郁男 米田
真也 鈴木
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Shinmaywa Industries Ltd
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Description

本発明は、荷受台昇降装置において、荷受台を最上昇位置で位置決めするための最上昇位置決め装置に関するものである。   The present invention relates to a highest ascending positioning device for positioning a cargo receiving base at a highest ascent position in a cargo receiving base lifting device.

従来、車輌の荷箱に立設された左右一対の支柱内にスライダが設けられるとともに、スライダに連結されたワイヤを、伸縮シリンダの伸縮動作により支柱内に繰り出しもしくは支柱内から引き込むことによりスライダを支柱に沿って昇降作動させ、これにより当該スライダに支持された荷受台が上記支柱に沿って昇降自在に設けられた荷受台昇降装置が提供されている。   Conventionally, a slider is provided in a pair of left and right columns that are erected on a cargo box of a vehicle, and a wire connected to the slider is extended into the column or retracted from the column by an expansion / contraction operation of the expansion / contraction cylinder. There is provided a load receiving table elevating device in which a load receiving table supported by the slider is moved up and down along the column so that the load receiving table can be moved up and down along the column.

そして、このような支柱に沿って荷受台を昇降させる荷受台昇降装置では、荷受台が荷台と略面一となる最上昇位置で当該荷受台の上昇を強制的に停止させる最上昇位置決め装置が設けられている。   And in the load receiving platform lifting device that lifts and lowers the load receiving table along such a support column, the highest lift positioning device that forcibly stops the lifting of the load receiving table at the highest lift position where the load receiving table is substantially flush with the load receiving platform. Is provided.

この最上昇位置決め装置としては、例えば支柱の上部にストッパブラケットを設けるとともに、スライダの上端部にストッパボルトを設けており、スライダが最上昇位置まで上昇した際にこのスライダのストッパボルトがストッパブラケットに当接することにより、当該スライダを介して荷受台を最上昇位置で停止させるようにしている（例えば、特許文献１参照。）。   As this highest rise positioning device, for example, a stopper bracket is provided at the upper part of the column and a stopper bolt is provided at the upper end of the slider. When the slider is raised to the highest position, the stopper bolt of the slider is attached to the stopper bracket. By contacting, the load receiving platform is stopped at the highest position via the slider (see, for example, Patent Document 1).

また、図８に示すようにスライダａが最上昇位置まで上昇した際において、当該スライダａから支柱ｂの後面に形成された溝ｂ１を挿通して後方に突出したブラケットｃに当該支柱ｂに設けたストッパｄを当接させることによって、このブラケットｃに設けた荷受台ｅを最上昇位置で停止させるようにしたものもある。   Further, as shown in FIG. 8, when the slider a is raised to the highest position, the bracket b is provided in the bracket b that protrudes rearward from the slider a through the groove b1 formed on the rear surface of the pillar b. In some cases, the stopper d provided in the bracket c is stopped at the highest position by contacting the stopper d.

そして、支柱ｂの上部には、スライダａに連結したワイヤｆを当該支柱ｂ内において導くシーブｇが設けられており、当該シーブｇは支柱ｂの上部側面に脱着自在に設けられた取付プレートｈに回転自在に支持されている。
特開２００２−１１４０８０号公報 A sheave g for guiding the wire f connected to the slider a into the support column b is provided at the upper portion of the support column b. The sheave g is attached to the upper side surface of the support column b so as to be detachable. Is supported rotatably.
JP 2002-1114080 A

しかしながら、上記従来のように、シーブｇを支持する取付ブラケットｈと、ストッパｄとを支柱ｂに別個に設けているものでは、最上昇位置でスライダａがストッパｄに当接して当該スライダａが停止する際において、ワイヤｆの引張力をＦとした場合に、取付プレートｈにはシーブｇを挟んだワイヤｆによって下方に２Ｆの力が作用する構造になっていた。   However, in the case where the mounting bracket h for supporting the sheave g and the stopper d are separately provided on the support b as in the conventional case, the slider a comes into contact with the stopper d at the highest position so that the slider a When stopping, assuming that the tensile force of the wire f is F, the attachment plate h has a structure in which a force of 2F is applied downward by the wire f sandwiching the sheave g.

本発明は、最上昇位置でスライダがストッパに当接して当該スライダが停止した際にシーブを備えた取付プレートに作用する負荷の低減を図り、これによる各部材の耐久性の向上や、構造の簡略化等を図ることができる荷受台昇降装置における荷受台の最上昇位置決め装置を提供することを目的とするものである。   The present invention aims to reduce the load acting on the mounting plate provided with the sheave when the slider comes into contact with the stopper at the highest position and stops, thereby improving the durability of each member and the structure. It is an object of the present invention to provide a maximum receiving position positioning device for a load receiving platform in a load receiving table lifting / lowering device that can be simplified.

上記の目的を達成するため、請求項１に係る発明の荷受台昇降装置における荷受台の最上昇位置決め装置は、車輌の荷箱に立設された左右一対の支柱内にスライダが設けられるとともに、スライダに連結されたワイヤを、伸縮シリンダの伸縮動作により支柱内に繰り出しもしくは支柱内から引き込むことによりスライダを支柱に沿って昇降作動させ、これにより当該スライダに支持された荷受台が上記支柱に沿って昇降自在に設けられる一方、最上昇位置決め装置によるスライダとの当接により当該スライダの上昇を阻止することによって荷受台が最上昇位置で位置決め可能になされた荷受台昇降装置において、
前記支柱の上部には、前記ワイヤを導くシーブを回転自在に支持する取付プレートが設けられるとともに、該取付プレートには前記最上昇位置決め装置が設けられたものである。 In order to achieve the above object, the highest rise positioning device for the load receiving platform in the load receiving platform lifting device of the invention according to claim 1 is provided with a slider in a pair of left and right support columns erected on the cargo box of the vehicle, The wire connected to the slider is moved up and down along the column by extending or retracting the wire connected to the slider by the expansion / contraction operation of the expansion / contraction cylinder, whereby the load receiving table supported by the slider moves along the column. In the load receiving platform lifting device in which the load receiving platform can be positioned at the highest lifted position by preventing the slider from rising by contact with the slider by the highest lift positioning device.
A mounting plate that rotatably supports a sheave for guiding the wire is provided on the upper portion of the support column, and the highest-positioning device is provided on the mounting plate.

請求項２に係る発明の荷受台昇降装置における荷受台の最上昇位置決め装置は、前記最上昇位置決め装置は、取付プレートに設けられた保持部材と、この保持部材に設けられ、前記スライダの上端部と当接する当接部材とを備えてなるものである。   According to a second aspect of the present invention, there is provided the highest lift positioning device for the load receiving platform, wherein the highest lift positioning device includes a holding member provided on a mounting plate and an upper end portion of the slider. And an abutting member that abuts.

本発明によれば、最上昇位置でスライダが当接部材に当接して当該スライダを停止させる際において、シーブを備えた取付プレートに作用する負荷を低減させることができ、これによって最上昇位置でのスライダの当接停止に伴う衝撃による各部材の損傷などを抑制することができ耐久性の向上を図ることができるとともに、騒音の発生も小さくすることができる。   According to the present invention, when the slider comes into contact with the contact member at the highest position to stop the slider, the load acting on the mounting plate provided with the sheave can be reduced. It is possible to suppress the damage of each member due to the impact accompanying the stop of the contact of the slider, to improve the durability, and to reduce the generation of noise.

以下、本発明の実施の形態について図面を参照して説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、荷受台昇降装置を示している。   FIG. 1 shows a load receiving table lifting device.

荷受台昇降装置１は、車輌の荷箱２の後端に立設された左右一対の支柱３と、該支柱３内に昇降自在にそれぞれ挿入されたスライダ４（図２参照）と、左右のスライダ４の下端部に支持された荷受台５と、各スライダ４にそれぞれワイヤ６を介して連結された昇降シリンダ７とから構成されている。   The load receiving platform lifting / lowering device 1 includes a pair of left and right support columns 3 erected at the rear end of a cargo box 2 of a vehicle, sliders 4 (see FIG. 2) inserted into the support columns 3 so as to be movable up and down, and left and right It is comprised from the load receiving stand 5 supported by the lower end part of the slider 4, and the raising / lowering cylinder 7 connected with each slider 4 via the wire 6, respectively.

具体的には、支柱３は、横断面が矩形状で中空の長尺体からなり、この内部にスライダ４が配置されている。スライダ４は、図２に示すようにその上端部及び途中部に昇降ローラ４１がそれぞれ設けられ、これら昇降ローラ４１によってスライダ４の昇降移動を円滑に行なうようにしている。   Specifically, the support column 3 is formed of a hollow long body having a rectangular cross section, and the slider 4 is disposed therein. As shown in FIG. 2, the slider 4 is provided with elevating rollers 41 at the upper end portion and the middle portion thereof, and the elevating and lowering movement of the slider 4 is smoothly performed by these elevating rollers 41.

そして、これら左右のスライダ４の上端部には各ワイヤ６の一端部がそれぞれ止着されている。ワイヤ６は、スライダ４から上方に導かれ、支柱３の上部に設けられたシーブ３１によって下方に折り返されて前部側を下方に導かれた後、前記支柱３の下部からシーブ（図示省略）を経て昇降シリンダ７に導かれ、他端が適宜に止着されている。   One end of each wire 6 is fixed to the upper end of the left and right sliders 4. The wire 6 is guided upward from the slider 4, folded downward by a sheave 31 provided on the upper portion of the support column 3, guided downward on the front side, and then sheaveed from the lower portion of the support column 3 (not shown). And the other end is appropriately fixed.

昇降シリンダ７は、図１に示すように支柱３間に配設されたクロスメンバー８内の前部に配置されており、この昇降シリンダ７の伸縮作動により上述のように配置されたワイヤ６を支柱３内に繰り出し、もしくは支柱３内から引き込むことによりスライダ４を昇降作動させるようにしている。   As shown in FIG. 1, the elevating cylinder 7 is disposed at the front portion in the cross member 8 disposed between the support columns 3, and the wire 6 disposed as described above is extended and retracted by the elevating cylinder 7. The slider 4 is moved up and down by being drawn into the column 3 or pulled in from the column 3.

荷受台５は、各スライダ４の下端部から後方に突出した左右のブラケット４２にその基端部両端が水平軸５１に支持され、支柱３に沿って起立する起立位置（格納状態）と、略水平な水平位置（作業状態）とに配置することができる。前記支柱３の後壁３２には上下方向に切欠溝３３（図１参照）が形成されており、左右のブラケット４２はこの切欠溝３３を挿通して支柱３から後方に突出配置されている。   The load receiving platform 5 is supported by a horizontal shaft 51 on the left and right brackets 42 projecting rearward from the lower end of each slider 4, and has an upright position (stored state) standing up along the column 3. It can be placed in a horizontal position (working state). A notch groove 33 (see FIG. 1) is formed in the rear wall 32 of the support column 3 in the vertical direction, and the left and right brackets 42 are disposed so as to protrude rearward from the support column 3 through the notch groove 33.

従って、前述したように昇降シリンダ７によりスライダ４を昇降作動させることで、当該スライダ４に連結された荷受台５を水平状態を保持して地上と荷箱２の床面との間で昇降作動させることができる。   Therefore, as described above, when the slider 4 is moved up and down by the lifting cylinder 7, the load receiving platform 5 connected to the slider 4 is kept in a horizontal state and moved up and down between the ground and the floor surface of the packing box 2. Can be made.

ところで、このように構成された荷受台昇降装置１には、図２に示すように荷受台５が最上昇位置に達した際に当該荷受台５の上昇を強制的に停止させるための最上昇位置決め装置１０が設けられている。   By the way, in the load receiving platform lifting / lowering device 1 configured as described above, as shown in FIG. 2, when the load receiving platform 5 reaches the highest lift position, the highest lift for forcibly stopping the lifting of the load receiving platform 5 is performed. A positioning device 10 is provided.

この最上昇位置決め装置１０は、図３乃至図５に示すように、支柱３の上部に着脱自在に取付けられる取付プレート１１と、この取付プレート１１に設けられた保持部材１２と、保持部材１２に上下方向の突出量が調整可能なようにねじ込んで設けられた当接部材としての当接ボルト１５（図２参照）とを備えている。   As shown in FIGS. 3 to 5, the most elevated positioning device 10 includes an attachment plate 11 that is detachably attached to the upper portion of the column 3, a holding member 12 provided on the attachment plate 11, and a holding member 12. A contact bolt 15 (see FIG. 2) is provided as a contact member that is screwed so that the amount of protrusion in the vertical direction can be adjusted.

取付プレート１１は、図２に示すように支柱３の前後幅に対応した長方形状に形成された平板であり、当該支柱３の上部外側面に形成された開口部３ａを閉じるようにしてその四隅をネジ締め１１ａによって着脱自在に取付けられている。   As shown in FIG. 2, the mounting plate 11 is a flat plate formed in a rectangular shape corresponding to the front-rear width of the support column 3, and has four corners so as to close the opening 3a formed on the upper outer surface of the support column 3. Are detachably attached by screw tightening 11a.

上記保持部材１２は、上述したように取付プレート１１を支柱３に取付けた際に支柱３内に面する当該取付プレート１１の内側面に連結部材１４を介して配設されている。そして、保持部材１２は、ネジ孔が貫通形成されたナット部材で構成されている。   As described above, the holding member 12 is disposed on the inner surface of the mounting plate 11 facing the support 3 when the mounting plate 11 is mounted on the support 3 via the connecting member 14. And the holding member 12 is comprised with the nut member by which the screw hole was penetrated and formed.

上記当接ボルト１５は、図６に示すようボルト部材１６の頭部１６ａに当接部１７が設けられてなるもので、ボルト部材１６のネジ棒部１６ｂが前記保持部材１２のネジ孔にねじ込み可能になされている。従って、保持部材１２に、当接部１７を下方にしてネジ棒部１６ｂを下方から所定量ねじ込んでナット１５ａで固定することで、当接部１７を保持部材１２から下方に突出した状態で配置させることができる（図２参照）。   As shown in FIG. 6, the contact bolt 15 is provided with a contact portion 17 on the head 16 a of the bolt member 16, and the screw rod portion 16 b of the bolt member 16 is screwed into the screw hole of the holding member 12. It has been made possible. Accordingly, the abutting portion 17 is disposed on the holding member 12 in a state where the abutting portion 17 protrudes downward from the holding member 12 by screwing a predetermined amount of the screw rod portion 16b from below and fixing with the nut 15a. (See FIG. 2).

このように当接ボルト１５を保持部材１２にネジ込んで配置するので、そのネジ込み量を調整することで当接部１７が保持部材１２から突出する長さを可変にすることができる。   Since the contact bolt 15 is screwed into the holding member 12 in this way, the length of the contact portion 17 protruding from the holding member 12 can be made variable by adjusting the screwing amount.

当接部１７は、取付プレート１１を支柱３に取付けた際にスライダ４の上端部と当接する部位であり、緩衝部材としてのゴムなどの弾性部材１７ａが支持部材１７ｂを介して上記頭部１６ａにネジ止めされてなる。   The abutting portion 17 is a portion that abuts against the upper end portion of the slider 4 when the mounting plate 11 is attached to the support column 3, and an elastic member 17a such as a rubber as a buffer member is interposed between the head 16a via the support member 17b. It is screwed to.

また、前記取付プレート１１の連結部材１４は、前記保持部材１２を取付ける他、前記シーブ３１を回転自在に支持する部位にもなされている。具体的には、連結部材１４には、図５に示すように取付プレート１１と平行な２枚のプレート部１４ａ、１４ｂを有し、これらプレート部１４ａ、１４ｂの間に前記シーブ３１を配置し、プレート部１４ａ、１４ｂ及び取付プレート１１に一直線上にそれぞれ形成された通孔１４ｃ、１１ｂに挿入された支持ピン３１ａ（図２参照）によりシーブ３１を回転自在に支持している。   Further, the connecting member 14 of the mounting plate 11 is provided at a portion for rotatably supporting the sheave 31 in addition to attaching the holding member 12. Specifically, the connecting member 14 has two plate portions 14a and 14b parallel to the mounting plate 11 as shown in FIG. 5, and the sheave 31 is disposed between the plate portions 14a and 14b. The sheave 31 is rotatably supported by support pins 31a (see FIG. 2) inserted into through holes 14c and 11b formed in a straight line on the plate portions 14a and 14b and the mounting plate 11, respectively.

なお、以上説明した最上昇位置決め装置１０は、図１における左側の支柱３に設けられたもので、右側の支柱３には上記最上昇位置決め装置１０と基本的に同様で左右対称に構成された最上昇位置決め装置（図示省略）が設けられている。   The most elevated positioning device 10 described above is provided on the left support column 3 in FIG. 1, and the right support column 3 is basically similar to the most elevated positioning device 10 and is configured symmetrically. A most elevated positioning device (not shown) is provided.

次に、このように構成された最上昇位置決め装置１０による荷受台５の最上昇位置での位置決めについて説明する。   Next, the positioning of the load receiving platform 5 at the most elevated position by the most elevated positioning device 10 configured as described above will be described.

まず、スライダ４の上昇により荷受台５が所定の高さまで上昇すると、スライダ４の上端部が当接ボルト１５の当接部１７に当接し、この位置でスライダ４を介して荷受台５を強制的に上昇停止させることで荷受台５の最上昇位置が決定される。   First, when the load receiving platform 5 rises to a predetermined height due to the rise of the slider 4, the upper end portion of the slider 4 comes into contact with the contact portion 17 of the contact bolt 15, and the load receiving platform 5 is forced through the slider 4 at this position. Thus, the highest lift position of the load receiving platform 5 is determined by stopping the lift.

また、保持部材１２に対する当接ボルト１５のねじ込み量、つまり保持部材１２から下方に突出する当接ボルト１５の当接部１７の上下位置を調整することで、その範囲内でスライダ４が当接する高さ位置を調整することができ、これにより荷受台５の最上昇位置を調整することができる。   Further, by adjusting the screwing amount of the contact bolt 15 with respect to the holding member 12, that is, the vertical position of the contact portion 17 of the contact bolt 15 protruding downward from the holding member 12, the slider 4 contacts within the range. The height position can be adjusted, whereby the highest lift position of the load receiving platform 5 can be adjusted.

ところで、上述のようにスライダ４の上端部が当接することによって荷受台５を最上昇位置で位置決めする当接ボルト１５は、保持部材１２と連結部材１４を介して取付プレート１１に一体的に設けられるとともに、この取付プレート１１にはワイヤ６が巻回されたシーブ３１も設けられている。   By the way, as described above, the contact bolt 15 for positioning the load receiving platform 5 at the highest position by contacting the upper end of the slider 4 is provided integrally with the mounting plate 11 via the holding member 12 and the connecting member 14. In addition, the mounting plate 11 is also provided with a sheave 31 around which the wire 6 is wound.

このため、最上昇位置でスライダ４が当接ボルト１５の当接部１７に当接して当該スライダ４を停止させる際には、図７に示すようにワイヤ６の引張力をＦとした場合に、シーブ３１からスライダ４側に垂下して当該スライダ４に連結された後側のワイヤ６ａでは、スライダ４が当接ボルト１５に当接した時に生じる力Ｆと打ち消し合うように作用し、これにより取付プレート１１にはワイヤ６の引張力に相当する１Ｆの力だけが作用することになる。   For this reason, when the slider 4 comes into contact with the contact portion 17 of the contact bolt 15 and stops the slider 4 at the highest position, when the tensile force of the wire 6 is F as shown in FIG. The rear wire 6a that hangs down from the sheave 31 toward the slider 4 and is connected to the slider 4 acts so as to counteract the force F generated when the slider 4 comes into contact with the contact bolt 15. Only a force of 1F corresponding to the tensile force of the wire 6 acts on the mounting plate 11.

つまり、前述した従来の構造のものと比べて取付プレート１１に作用する負荷が半減することになり、これによって最上昇位置でのスライダ４の当接停止に伴う衝撃による各部材の損傷などを抑制することができ耐久性の向上を図ることができるとともに、騒音の発生も小さくすることができる。また取付プレート１１にシーブ３１と最上昇位置決め装置とを一緒に設けることで、シーブ３１と最上昇位置決め装置とを別々に設けるものに比べて構造を簡略化することができる。   That is, the load acting on the mounting plate 11 is halved compared to the conventional structure described above, thereby suppressing damage to each member due to the impact caused by the stoppage of the slider 4 at the highest position. Thus, the durability can be improved and the generation of noise can be reduced. Further, by providing the mounting plate 11 with the sheave 31 and the highest ascending positioning device, the structure can be simplified as compared with the case where the sheave 31 and the highest ascending positioning device are provided separately.

荷受台昇降装置の全体の概略構成を示す斜視図である。It is a perspective view which shows the schematic structure of the whole cargo receiving stand raising / lowering apparatus. 支柱に取付けた最上昇位置決め装置を示す側面図である。It is a side view which shows the highest rise positioning apparatus attached to the support | pillar. 取付プレート及び保持部材を示す正面図である。It is a front view which shows an attachment plate and a holding member. 図３におけるＡ矢視図である。It is A arrow directional view in FIG. 図３におけるＢ−Ｂ断面図である。It is BB sectional drawing in FIG. 当接ボルトを示す側面図である。It is a side view showing a contact bolt. ストッパとの当接によってスライダを最上昇位置で停止させたときの取付プレートに作用する負荷を説明するための概略図である。It is the schematic for demonstrating the load which acts on a mounting plate when a slider is stopped in the highest position by contact | abutting with a stopper. 従来の最上昇位置決め装置を示す側面図である。It is a side view which shows the conventional highest rise positioning apparatus. 従来におけるストッパとの当接によってスライダを最上昇位置で停止させたときの取付プレートに作用する負荷を説明するための概略図である。It is the schematic for demonstrating the load which acts on a mounting plate when a slider is stopped in the highest position by contact | abutting with the stopper in the past.

符号の説明Explanation of symbols

１ 荷受台昇降装置
２ 荷箱
３ 支柱
３１ シーブ
４ スライダ
５ 荷受台
６ ワイヤ
１０ 最上昇位置決め装置
１１ 取付プレート
１２ 保持部材
１５ 当接ボルト（当接部材）
DESCRIPTION OF SYMBOLS 1 Cargo stand raising / lowering device 2 Cargo box 3 Support | pillar 31 Sheave 4 Slider 5 Cargo cradle 6 Wire 10 Uppermost positioning device 11 Mounting plate 12 Holding member 15 Contact bolt (contact member)

Claims (2)

車輌の荷箱に立設された左右一対の支柱内にスライダが設けられるとともに、スライダに連結されたワイヤを、伸縮シリンダの伸縮動作により支柱内に繰り出しもしくは支柱内から引き込むことによりスライダを支柱に沿って昇降作動させ、これにより当該スライダに支持された荷受台が上記支柱に沿って昇降自在に設けられる一方、最上昇位置決め装置によるスライダとの当接により当該スライダの上昇を阻止することによって荷受台が最上昇位置で位置決め可能になされた荷受台昇降装置において、
前記支柱の上部には、前記ワイヤを導くシーブを回転自在に支持する取付プレートが設けられるとともに、該取付プレートには前記最上昇位置決め装置が設けられたことを特徴とする荷受台昇降装置における荷受台の最上昇位置決め装置。 A slider is provided in a pair of left and right columns that are erected on the cargo box of the vehicle, and a wire connected to the slider is extended into the column by the expansion and contraction operation of the expansion cylinder or pulled into the column by the expansion and contraction of the slider. As a result, the load receiving table supported by the slider is provided so as to be able to move up and down along the support column. In the load receiving table lifting device in which the table can be positioned at the highest position,
A mounting plate for rotatably supporting the sheave for guiding the wire is provided at an upper portion of the support column, and the highest lift positioning device is provided on the mounting plate. The highest lift positioning device. 前記最上昇位置決め装置は、取付プレートに設けられた保持部材と、この保持部材に設けられ、前記スライダの上端部と当接する当接部材とを備えてなることを特徴とする請求項１記載の荷受台昇降装置における荷受台の最上昇位置決め装置。
The said highest raising positioning apparatus is provided with the holding member provided in the attachment plate, and the contact member which is provided in this holding member and contact | abuts the upper end part of the said slider. The highest lift positioning device for the load receiving platform in the load receiving platform lifting device.
JP2004179730A 2004-06-17 2004-06-17 Maximum lift positioning device for load receiving platform in load receiving platform lifting device Expired - Lifetime JP3833675B2 (en)

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JP2009040205A (en) * 2007-08-08 2009-02-26 Murata Unso:Kk Cargo receiving platform lifter and loading/unloading method of cargo using the same
JP5490484B2 (en) * 2009-10-09 2014-05-14 新明和工業株式会社 Loading platform lifting device
JP5490483B2 (en) * 2009-10-09 2014-05-14 新明和工業株式会社 Loading platform lifting device

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