【０００１】
【発明の属する技術分野】
本発明は側溝等の溝蓋を取外したり、取付けたりする場合に使用される溝蓋の吊上装置に関し、更にはコンクリートブロックや歩道敷板その他類似の重量物を吊り上げて荷役移動する場合にも活用できる溝蓋等の荷役材吊上機に関するものである。
【０００２】
【従来の技術】
溝蓋を、側溝等に取付けたり、取外す作業は、一般的には人手によって行われており、軽いものは良いが、人手では持ち運びできない重量のあるものは、手作業では非常に困難である。そこでこれを簡単にするために、例えば特開平８―２２５１２３号公報に側溝具の開閉具が提案され、或いは特開平９―４０３７号公報にコンクリート製側溝蓋の挟持装置が提案されている。
【０００３】
【発明が解決しようとする課題】
本発明は、人手では簡単に持ち運びすることのできない重量のある溝蓋を、簡便に吊上げ、移動させることのできる吊上機を提供することを目的とすると共に、上記従来技術に提示した提案例のものより溝蓋の挟持力を強くし、溝蓋の昇降もより抵抗少なくして更に使い勝手を良くした溝蓋等の荷役材吊上機を提供することを解決課題とする。
【０００４】
【課題を解決するための手段】
上記課題を解決するために、本発明は第一に、後端部に取手部が設けられ、先端部に溝蓋等の荷役材吊上げ部を設けたフレームの先端部寄り下部に遊転自在なキャスターを設けて、該フレームをキャスター近傍の支点回りに側面視でシーソー揺動可能に構成した吊上機において、前記吊上げ部を構成するのに、フレームの先端部に横方向の吊アームを配設し、該吊アームの両端下部に吊リンクを介して上下方向に伸縮可能なＸ字状の挟持リンクを設け、該挟持リンクの下部両端に荷役材の両側面を挟持する挟持面をもつ挟持部材を各々装着すると共に、各挟持リンクの挟持部材近傍部を横方向の連結アームにて枢着可能に連結し、前記Ｘ字状の挟持リンクが伸長／縮小する吊アームの上昇／下降位置に応じて左右の挟持部材の対向距離を接近／離間自在に構成したことを特徴とするものである。
【０００５】
第二に、フレームの先端部に前後方向回動可能に吊部材を垂設し、該吊部材に水平面内で回動可能に吊アームを配設し、フレームに対して吊りアームを回傾動可能にフレームに枢着したことを特徴とし、第三に、挟持リンクの下部両端に設けられる挟持部材の装着位置を変更可能に構成したことを特徴とする。そして第四に、上部の吊アーム若しくは下部の連結リンクにフック部材を回動可能に枢着し、該吊アーム若しくは連結リンクにフック止め部材を配設し、前記フック部材をフック止め部材にロックする方向に弾持する弾性部材を設ける共に該フック部材をフック止め部材から解除する遠隔操作部を取手部若しくは取手部近傍に設けたことを特徴とする溝蓋等の荷役材吊上機を提供することにより上記課題を解決したものである。
【０００６】
【発明の実施の形態】
本発明の溝蓋等の荷役材吊上機を図面に示す一実施形態により説明する。図１に示すように、角鋼管部材よりなるフレーム１の後端部に角ハンドル状の取手部２が設けられ、フレーム１の先端部に溝蓋２２等の荷役材吊上げ部Ｌが吊設されている。該フレーム１の先端部寄り下部に車軸２１ａ回りに遊転自在なキャスター２１が設けてあり、該フレーム１は前記車軸２１ａを支点として側面視でシーソー揺動可能に構成されている。従って、作業者がフレーム１の取手部２を把持して後端部を下降させフレーム１の先端部を地面より離間上昇させた状態で、キャスター２１により任意箇所への移動が容易にできるように構成される。
前記溝蓋２２等の荷役材吊上げ部Ｌの構成を説明する。フレーム１の先端部に前後方向回動可能にＵ字形状の吊金具からなる吊部材１１をボルト１４、ナット１５で垂設し、該吊部材１１にボルト１２、ナット１３で枢支して水平面内で回動可能に横方向の吊アーム９を配設し、フレーム１に対して吊りアーム９を回傾動可能に枢着させてある。
【０００７】
該吊アーム９の両端下部に吊リンク１０、１０を介して上下方向に伸縮可能なＸ字状の挟持リンク３、３を設け、該挟持リンク３、３の下部両端に溝蓋２２等の荷役材の両側面を挟持する挟持面をもつ平板状の挟持部材４、４を各々装着すると共に、各挟持リンク３、３の挟持部材４、４近傍部３ａ、３ａを横方向の連結アーム５にてピンで枢着可能に連結する。そして、前記挟持板４を挟持リンク３の一端に、溝蓋２２等の荷役材の幅に応じて位置調整する様に、係合孔４ａまたは４ｂにピン６、平ワッシャー７および松葉ピン８で取着し、該挟持リンク３を対向させて連結アーム５に、挟持時の挟持支点となる係合孔３ａにピンで枢着し、作用点となる挟持板４までの腕長さと、力点となる係合孔３ｂまでの腕長さを変更可能にして、溝蓋２２等の荷役材を掴む時の梃子となし該係合孔３ｂを上方の吊アーム９にピンで吊リンク１０で枢着されている。
これにより、前記Ｘ字状の挟持リンク３、３が伸長する吊アーム９の上昇位置では左右の挟持部材４、４の対向距離を接近させて、該挟持部材４、４で溝蓋２２等の荷役材の両側面を挟持して吊り上げ可能とする。また、前記Ｘ字状の挟持リンク３、３が縮小する吊アーム９の下降位置では左右の挟持部材４、４の対向距離を離間させて溝蓋２２等の荷役材の両側面の幅より拡げるように構成されるものである。
【０００８】
尚、前述の通り、吊アーム９は吊金具１１にボルト１２とナット１３で水平面の方向に沿って回動自在に蝶着し、更にフレーム１にボルト１４、ナット１５で前後方向に傾動自在に蝶着して、フレーム１に対して回傾動可能に構成し吊上げ時の作用点となし、作用として、傾動構成は溝蓋２２の吊上げ時の水平維持に効果を発揮し、また回動構成は溝と直行または平行等の溝蓋２２の設置場所のスペースに対応した作業方向を容易にとるための効果を発揮するものである。
【０００９】
また、上下方向に伸縮可能なＸ字状の挟持リンク３、３を縮小した状態に維持できるロック装置が設けてある。即ち、上部の吊アーム９にフック部材１６をボルト１８で回動可能に枢着し、下部の連結アーム５にピン５ａ等のフック止め部材を配設し、該フック部材１６をフック止め部材５ａにロックする方向に弾持するねじりバネ１７等の弾性部材とフック部材１６のオーバーストロークを防止するストッパーピン１６ａを設けて、該フック部材１６を、挟持板４が溝蓋２２の幅より少し広めになる様に挟持リンク３を縮小した状態でフック止め部材５ａに引掛けるよう構成されている。そして、該フック部材１６には、フック部材１６をフック止め部材５ａから解除する遠隔操作手段としてのワイヤー１９が連結されており、該ワイヤー１９はフレーム１内を挿通して取手部２近傍若しくは取手部２まで張設して操作時に引く遠隔操作部としてのワイヤー環２０に連結されている。
【００１０】
なお、上記ロック装置のフック部材１６を連結アーム５に設け吊アーム９にピン等のフック止め部材を配設しても良い。また、上記ねじりバネ１７を、同等の作用をする引っ張りバネ、圧縮バネ等に替えても良い。また、遠隔操作部としてのワイヤー環２０は操作部材として汎用的に使用されている握りレバーや操作レバー等に替えても良く、更に、挟持部材４、４の挟持面に挟着固定をより確実にするゴム、皮、布等の滑り防止用の摩擦部材を貼着するようにしても良い。因みに本実施形態ではフレーム１をキャスター２１の車軸２１ａを支点として側面視でシーソー揺動可能に構成されているものを示したが、キャスター２１を前後複数輪の構成にした場合にはシーソー不能となるので車軸以外のキャスター２１近傍に支点を設けるようにしても良く、各部の構成要素を本発明の趣旨に添う技術思想で構成変更することは本発明の範疇と解されるものである。
【００１１】
以上総括して、吊上機全体を見ると図１に示すように、挟持板４の挟持部を作用点に、キャスター２１を支点とし、取手２を力点とした梃子式の荷役材吊上機としている。また荷役材吊上機全体の重心Ｇはキャスター２１より先端部側に位置するよう設定されているので、不使用時には先端の溝蓋２２等の荷役材吊上げ部Ｌが下降着地し取手部２を上昇位置とした前低後高状のフレーム１姿勢として安定状態で安置することができる。
【００１２】
次に、動作について説明すると、先ず、先端の溝蓋２２等の荷役材吊上げ部Ｌが下降着地した前低後高状のフレーム１の取手部２を把持して押し下げ、荷役材吊上げ部Ｌを地面より離間させて上昇位置とした状態でキャスター２１により機動性良く軽快・円滑に目的位置に移動させる。この時、上下方向に伸縮可能なＸ字状の挟持リンク３、３はロック装置で縮小した状態に維持されている。そして、例えば溝蓋２２の場合には溝蓋２２両側面に形成される凹陥部２２ａ、２２ａに挟持板４、４を上方より臨ませて差し込むと、重心位置Ｇの関係で自重により挟持板４、４基部のホルダ筒部の下縁が溝蓋２２の上縁に当接するまで下降する。
【００１３】
この状態で取手２近傍のワイヤー環２０を引いて挟持リンク３、３のロック装置を解除し、取手部２をゆっくりと下方に押し下げれば、挟持板４、４基部のホルダ筒部の下縁が溝蓋２２の上縁に当接したままの状態で吊アーム９が上昇しＸ字状の挟持リンク３、３が徐々に伸長して挟持板４、４の対向間隙が漸次巾狭になり、溝蓋２２両側面に形成される凹陥部２２ａ、２２ａを狭着する。そして更に取手部２を下方に押し下げれば吊アーム９が上昇して挟持板４、４の対向間隙を更に狭める方向の挟持力が増大されて溝蓋２２の挟着力を強固なものとして溝蓋２２を吊上げることができる。この場合吊アーム９がフレーム１先端に回傾動自在に吊設されているので、溝蓋２２を垂直方向に上昇させることが容易になり吊上げ作用を抵抗少なくして円滑に遂行できる。
【００１４】
そして溝蓋２２を狭着保持して吊上げた状態で荷役材吊上機をキャスター２１により機動性良く移動し、所望位置で取手２を上方にシーソー作動させ吊アーム９を自重で下降させれば、溝蓋２２が着地し更に吊アーム９が下降すると挟持板４、４の対向間隙が拡がり溝蓋２２の保持を解除しロック装置のフック１６が自動的に引掛り挟持リンク３、３が縮小状態で固定され溝蓋が外せる。爾後、この動作の繰返しとなる。
【００１５】
また、取外した溝蓋２２を側溝に取付ける場合にも上記作用に準じて作業をすることができ、側溝に溝蓋２２を嵌め戻す時にも吊アーム９がフレーム１先端に回傾動自在に吊設されているので、溝蓋２２を垂直方向に下降させることが容易になり嵌め戻し時の溝蓋２２の取付け作業も抵抗少なくして軽快に効率的に遂行できる。
【００１６】
上記はコンクリート製溝蓋の例で説明したが、方式の異なる格子状の溝蓋はもちろんサイズの異なる溝蓋でも挟持板位置をかえることにより適用可能となり、溝蓋以外のコンクリートブロックや歩道敷板その他類似の重量物を吊上げて荷役移動する場合にも同様に労力を少なくして便利に活用することができる。
【００１７】
【発明の効果】
以上のように、請求項記載の発明によれば、吊上機を溝蓋上に移動して、作業方向をきめリンク固定フックを外し、取手部を押し下げるだけで梃子の作用により小さな力で、また回傾動作用点により良好な姿勢で溝蓋を極めて簡単に吊上げ、移動或いは吊下ろすことができる。また、図１に示すように全体を単純に構成したことにより、装置をコンパクトにすることができ機動性も向上でき、また、持ち運びも簡単になった。
【図面の簡単な説明】
【図１】本発明の全体斜視図である。
【図２】本発明の要部斜視図である。
【図３】本発明の要部正面作用図である。
【図４】本発明の要部正面作用図である。
【図５】本発明の要部正面作用図である。
【符号の説明】
１ フレーム
２ 取手
３ 挟持リンク
４ 挟持板
５ 連結アーム
９ 吊アーム
１０ 吊リンク
１１ 吊部材
１６ フック部材
１７ ねじりバネ
１９ ワイヤー
２０ ワイヤー環
２１ キャスター
２２ 溝蓋[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a gutter cover lifting device used for removing or attaching a gutter such as a gutter, and is also used for lifting and moving concrete blocks, sidewalk slabs and other similar heavy objects. The present invention relates to a lifting material lifting machine such as a ditch cover.
[0002]
[Prior art]
The work of attaching and detaching the groove cover to and from the side groove is generally performed manually, and a light one is good, but a heavy one that cannot be carried by hand is very difficult by hand. Therefore, in order to simplify this, for example, a gutter opening / closing device is proposed in JP-A-8-225123, or a concrete gutter lid holding device is proposed in JP-A-9-4037.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide a lifting machine capable of easily lifting and moving a heavy groove cover which cannot be easily carried by hand, and a proposal example presented in the above prior art. It is an object of the present invention to provide a cargo handling material lifting machine such as a groove lid which has a stronger gripping force of the groove lid than the one described above, and has a lower resistance to raising and lowering of the groove lid, thereby further improving usability.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention firstly provides a handle portion at a rear end portion, a free end portion of a frame provided with a cargo handling material lifting portion such as a groove cover at a front end portion, which is freely rotatable below a front end portion. In a lifting machine in which a caster is provided and the frame is configured to be capable of swinging a seesaw around a fulcrum near the caster in a side view, a horizontal suspension arm is provided at a leading end of the frame to constitute the lifting section. An X-shaped pinch link that is vertically expandable and contractible via a link at the lower end of each end of the link arm, and has a pinch surface at both lower ends of the link to hold both sides of the cargo handling material. At the same time as mounting the members, the vicinity of the holding member of each holding link is pivotally connected by a lateral connecting arm, and the X-shaped holding link is extended / reduced to the lifting / lowering position of the suspension arm. Approach the distance between the left and right holding members Is characterized in that the spaced freely configured.
[0005]
Secondly, a suspending member is provided at the end of the frame so as to be rotatable in the front-rear direction, and a suspending arm is disposed on the suspending member so as to be rotatable in a horizontal plane. Thirdly, it is characterized in that the mounting positions of the holding members provided at both lower ends of the holding link can be changed. Fourth, a hook member is rotatably connected to the upper suspension arm or the lower connection link, and a hook stopper is disposed on the suspension arm or the connection link, and the hook member is locked to the hook stopper. Characterized in that an elastic member that elastically holds in the direction in which the hook member is released and a remote control unit that releases the hook member from the hook stopper member are provided in the handle portion or in the vicinity of the handle portion. By doing so, the above problem has been solved.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
A cargo handling material lifting machine such as a groove cover according to the present invention will be described with reference to an embodiment shown in the drawings. As shown in FIG. 1, a handle portion 2 having a square handle shape is provided at a rear end of a frame 1 made of a square steel pipe member, and a cargo handling material lifting portion L such as a groove lid 22 is hung at the front end of the frame 1. ing. A caster 21 that is freely rotatable around an axle 21a is provided at a lower portion near the leading end of the frame 1, and the frame 1 is configured to be able to swing a seesaw in a side view with the axle 21a as a fulcrum. Therefore, in a state where the operator grips the handle portion 2 of the frame 1 and lowers the rear end portion and raises the front end portion of the frame 1 away from the ground, the caster 21 can easily move to an arbitrary position. Be composed.
The structure of the cargo handling material lifting portion L such as the groove lid 22 will be described. A suspending member 11 made of a U-shaped suspending metal is rotatably mounted on a front end portion of the frame 1 by a bolt 14 and a nut 15 so as to be rotatable in the front-rear direction. A horizontal suspension arm 9 is disposed so as to be rotatable inside, and the suspension arm 9 is pivotally attached to the frame 1 so as to be tiltable.
[0007]
X-shaped sandwiching links 3, 3 which can be vertically extended and contracted via suspending links 10, are provided at the lower ends of both ends of the suspending arm 9. The plate-like holding members 4 and 4 having the holding surfaces for holding the both side surfaces of the material are respectively mounted, and the holding members 4 and the vicinity portions 3a and 3a of the holding links 3 and 3 are connected to the lateral connecting arms 5 respectively. And pivotally connect with pins. Then, the pin 6, the flat washer 7 and the pine needle pin 8 are inserted into the engaging holes 4 a or 4 b so that the position of the holding plate 4 is adjusted to one end of the holding link 3 according to the width of the cargo handling material such as the groove lid 22. It is attached, the holding link 3 is opposed to the connecting arm 5, and is pivotally attached to the engaging hole 3a serving as a holding fulcrum at the time of holding by a pin. The length of the arm up to the engaging hole 3b can be changed, and the lever can be used as a lever when grasping a cargo material such as the groove lid 22. The engaging hole 3b is pivotally connected to the upper hanging arm 9 with a hanging link 10 using a pin. Have been.
Thus, at the raised position of the suspension arm 9 where the X-shaped holding links 3 extend, the opposing distances of the left and right holding members 4, 4 are reduced, and the holding members 4, 4, such as the groove lid 22, are closed by the holding members 4, 4. Both sides of the cargo handling material can be held and lifted. In the lower position of the suspension arm 9 where the X-shaped holding links 3 are reduced, the opposing distances of the left and right holding members 4, 4 are spaced apart from each other to increase the width of the cargo handling material such as the groove lid 22 on both sides. It is configured as follows.
[0008]
As described above, the suspension arm 9 is rotatably hinged to the suspension fitting 11 with the bolts 12 and the nuts 13 along the direction of the horizontal plane, and is further tiltably movable in the front-rear direction with the bolts 14 and the nuts 15 on the frame 1. The hinged structure is configured to be pivotable with respect to the frame 1 so as to be capable of pivoting and tilting, and serves as an action point at the time of lifting. As a function, the tilting configuration exerts an effect of maintaining the level of the groove lid 22 at the time of lifting. The effect of easily taking the working direction corresponding to the space of the installation location of the groove lid 22 such as perpendicular or parallel to the groove is exhibited.
[0009]
Further, there is provided a lock device capable of maintaining the X-shaped sandwiching links 3, which can expand and contract in the vertical direction, in a reduced state. That is, a hook member 16 is pivotally attached to the upper suspension arm 9 by a bolt 18 and a hook stopper such as a pin 5a is disposed on the lower connecting arm 5, and the hook member 16 is connected to the hook stopper 5a. An elastic member such as a torsion spring 17 for holding in the locking direction and a stopper pin 16a for preventing the overstroke of the hook member 16 are provided, and the hook member 16 is slightly wider than the width of the groove lid 22 by the holding plate 4. It is configured to be hooked on the hook stopper 5a in a state where the holding link 3 is reduced so that A wire 19 is connected to the hook member 16 as a remote control means for releasing the hook member 16 from the hook stopper 5a. It is connected to a wire ring 20 as a remote control unit that is stretched to the unit 2 and pulled during operation.
[0010]
The hook member 16 of the lock device may be provided on the connection arm 5 and a hook stopper such as a pin may be provided on the suspension arm 9. Further, the torsion spring 17 may be replaced with a tension spring, a compression spring, or the like having the same function. In addition, the wire ring 20 as the remote operation unit may be replaced with a grip lever or an operation lever that is generally used as an operation member, and furthermore, it is possible to more securely fix and clamp the clamping surfaces of the clamping members 4 and 4. A friction member for preventing slippage, such as rubber, leather, cloth, or the like, may be attached. By the way, in this embodiment, the frame 1 is configured such that the seesaw can swing in the side view with the axle 21a of the caster 21 as a fulcrum. Therefore, a fulcrum may be provided in the vicinity of the casters 21 other than the axle, and it is understood that changing the configuration of each component based on the technical idea according to the gist of the present invention is within the scope of the present invention.
[0011]
In summary, as shown in FIG. 1, when the entire lifting machine is viewed, as shown in FIG. 1, a lever-type loading material lifting machine using the holding portion of the holding plate 4 as a point of action, the caster 21 as a fulcrum, and the handle 2 as a power point. And In addition, since the center of gravity G of the entire cargo handling material lifting machine is set to be located on the tip side from the casters 21, when not in use, the cargo handling material lifting portion L such as the groove cover 22 at the tip descends and lands, causing the handle portion 2 to land. The frame 1 can be placed in a stable state as the posture of the frame 1 having a front-to-back and rear-to-top height set to the ascending position.
[0012]
Next, a description will be given of the operation. First, the cargo handling material lifting portion L such as the groove cover 22 at the front end grips and pushes down the handle portion 2 of the frame 1 having a low front and rear height when the landing material L descends and lands. The caster 21 is moved to the target position lightly and smoothly with good mobility while being separated from the ground to be in the raised position. At this time, the X-shaped sandwiching links 3, which can expand and contract in the vertical direction, are maintained in a reduced state by the lock device. In the case of the groove cover 22, for example, when the holding plates 4, 4 are inserted into the concave portions 22a, 22a formed on both side surfaces of the groove cover 22 from above, the holding plates 4, 4 by their own weights in relation to the center of gravity position G. The lower portion of the four holder cylinders is lowered until the lower edge thereof contacts the upper edge of the groove cover 22.
[0013]
In this state, the wire ring 20 near the handle 2 is pulled to release the locking device of the holding links 3, 3, and the handle portion 2 is pushed down slowly, so that the holding plate 4, the lower edge of the holder tubular portion at the base 4, While the abutment remains in contact with the upper edge of the groove lid 22, the X-shaped holding links 3, 3 gradually extend, and the opposing gap between the holding plates 4, 4 becomes gradually narrower. Then, the concave portions 22a, 22a formed on both side surfaces of the groove cover 22 are tightly fitted. When the handle portion 2 is further pushed downward, the suspension arm 9 is raised, the clamping force in the direction of further narrowing the opposing gap between the clamping plates 4, 4 is increased, and the clamping force of the groove cover 22 is strengthened to make the groove cover 22 stronger. 22 can be lifted. In this case, since the suspension arm 9 is suspended from the end of the frame 1 so as to be pivotable, it is easy to raise the groove lid 22 in the vertical direction, and the lifting operation is performed with reduced resistance and can be performed smoothly.
[0014]
Then, the cargo handling material lifting machine is moved by the casters 21 with high mobility while the groove lid 22 is held tightly and lifted, and the handle 2 is moved upward at a desired position to lower the lifting arm 9 by its own weight. When the groove lid 22 lands and the suspension arm 9 is further lowered, the gap between the holding plates 4 and 4 expands, the holding of the groove cover 22 is released, the hook 16 of the locking device is automatically hooked, and the holding links 3 and 3 are reduced. It is fixed in the state and the groove lid can be removed. Thereafter, this operation is repeated.
[0015]
In addition, when the detached groove cover 22 is attached to the side groove, the operation can be performed in accordance with the above-described operation. Even when the groove cover 22 is fitted back into the side groove, the suspension arm 9 is suspended at the tip of the frame 1 so as to be pivotable. As a result, the groove lid 22 can be easily lowered in the vertical direction, and the work of mounting the groove lid 22 at the time of refitting can be performed lightly and efficiently with little resistance.
[0016]
Although the above description has been made using the example of a concrete groove cover, it can be applied to various types of groove covers of different sizes as well as lattice-shaped groove covers of different types by changing the position of the holding plate. Similarly, when a similar heavy object is lifted and moved for cargo handling, labor can be reduced and it can be used conveniently.
[0017]
【The invention's effect】
As described above, according to the invention as set forth in the claims, the lifting machine is moved onto the groove lid, the working direction is determined, the link fixing hook is removed, and only the handle portion is pressed down with a small force due to the action of the lever, Further, the groove cover can be lifted, moved, or suspended very easily in a good posture by the tilting operation point. In addition, as shown in FIG. 1, the whole structure is simple, so that the apparatus can be made compact, the mobility can be improved, and the portability is also simplified.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of the present invention.
FIG. 2 is a perspective view of a main part of the present invention.
FIG. 3 is a front view showing the operation of the main part of the present invention.
FIG. 4 is a front view showing a main part of the present invention.
FIG. 5 is a front view of a main part of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Frame 2 Handle 3 Holding link 4 Holding plate 5 Connecting arm 9 Hanging arm 10 Hanging link 11 Hanging member 16 Hook member 17 Torsion spring 19 Wire 20 Wire ring 21 Caster 22 Groove cover
