JPS626076Y2 - - Google Patents

Description

【考案の詳細な説明】 本考案は例えば電動チエンブロツク及び電動ト
ロリー及び電動サドルなどを備え、比較的重い物
を取扱う製作組立工場などにおいて、工場の支柱
などを介して略平行に一対の走行レールを架設さ
せ、各走行レールに支持させる前記サドルにビー
ムの両端を連結固定させ、適宜高さに横架させる
前記ビームに前記トロリーを支持させ、そのトロ
リーに前記チエンブロツクを懸吊させ、前記走行
レールに沿つてサドルを前後に走行させると共
に、前記ビームに沿つてトロリーを左右に移動さ
せ、チエンブロツクを前後左右に移動させて希望
する任意の位置で荷物の吊上げ及び吊下し作業を
行う荷役作業用の装置に関し、正逆転手動操作ス
イツチと正逆転リレーコイルとの間に組込む正逆
転操作リミツトスイツチを、前記正逆転リレーコ
イルによつて切換える正逆転スイツチと可逆モー
タの駆動電源との間に組込む正逆転リミツトスイ
ツチよりも若干早くオフ作動させるべく、正逆転
操作及び正逆転の各リミツトスイツチを第１及び
第２カムを介して連結させ、可逆モータの正逆転
動作限界で正逆転操作リミツトスイツチがオフ作
動後に遅延して正逆転リミツトスイツチがオフ作
動するように構成するもので、前記正逆転スイツ
チが正常に作動しているときは手動操作用の低電
圧低電流を制御する正逆転操作スイツチを介して
従来と同様に荷役作業を繰返し行い得、また前記
正逆転スイツチが溶着した場合などに可逆モータ
駆動用の高電圧高電流を制御する正逆転リミツト
スイツチを介して可逆モータをこの正逆転動作限
界で確実に停止させ得、前記可逆モータの作動状
況に応じて多段的に安全にこの停止を図れると共
に、前記正逆転操作リミツトスイツチがオフ作動
しないときの安全スイツチ部材として前記正逆転
リミツトスイツチを兼用し得、また前記第１及び
第２カムを用いた簡単な構成で正逆転操作及び正
逆転の各リミツトスイツチを連動させ得るように
した荷役作業機用駆動装置を提供しようとするも
のである。[Detailed description of the invention] This invention is designed to be used in manufacturing and assembly factories that handle relatively heavy objects, such as electric chain blocks, electric trolleys, electric saddles, etc. The two ends of the beam are connected and fixed to the saddles supported by each running rail, the trolley is supported by the beam that is horizontally suspended at an appropriate height, the chain block is suspended from the trolley, and the trolley is suspended from the trolley. Cargo handling involves moving a saddle back and forth along a rail, moving a trolley left and right along the beam, and moving a chain block back and forth and left and right to lift and lower cargo at any desired position. Regarding the work device, a forward and reverse operation limit switch is installed between a forward and reverse manual operation switch and a forward and reverse relay coil, and a forward and reverse operation limit switch is installed between the forward and reverse switch that is switched by the forward and reverse relay coil and the drive power source of the reversible motor. In order to turn off a little earlier than the forward/reverse limit switch, the forward/reverse operation and forward/reverse limit switches are connected via the first and second cams, and the forward/reverse operation limit switch is turned off at the forward/reverse operation limit of the reversible motor. The forward/reverse limit switch is configured to turn off with a delay, and when the forward/reverse switch is operating normally, the forward/reverse limit switch is operated normally via the forward/reverse operation switch that controls low voltage and low current for manual operation. Similarly, cargo handling work can be carried out repeatedly, and if the forward/reverse switch is welded, the reversible motor can be reliably stopped at the forward/reverse operation limit via the forward/reverse limit switch that controls the high voltage and high current for driving the reversible motor. The reversible motor can be safely stopped in multiple stages depending on the operating status of the reversible motor, and can also be used as a safety switch member when the forward/reverse operation limit switch is not turned off. It is an object of the present invention to provide a drive device for a cargo handling machine that is capable of interlocking forward/reverse operation and forward/reverse limit switches with a simple configuration using first and second cams.

以下本考案の実施例を図面に基づいて詳述す
る。第１図乃至第３図に示す如く、工場などの構
築用支柱１…に梁部材２を介して左右一対の走行
レール３，３を略平行に架設させると共に、Ｈ形
鋼製ビーム４の両端を連結固定させる電動サドル
５，５を各レール３，３に上載する。前記レール
３に嵌着させる車輪６…と、該車輪６を駆動する
可逆モータ７とを前記サドル５に備え、モータ７
を正逆転させてビーム４を前後に移動させるよう
に形成する。また適宜高さに横架させる前記ビー
ム４に電動トロリー８を支持させると共に、前記
ビーム４に嵌合させる車輪９…と該車輪９を駆動
する可逆モータ１０とを前記トロリー８に備え、
前記モータ１０を正逆転させてトロリー８を左右
に移動させるように形成する。さらに支軸１１及
び懸吊金具１２を介して前記トロリー８の本体フ
レーム１３，１３下端に電動チエンブロツク１４
を前後左右に揺動自在に吊下げると共に、荷物吊
下フツク１５を有するロードチエン１６と、該チ
エン１６を巻上げ巻下し操作する可逆モータ１７
と、前記モータ１７の制御用配電ボツクス１８
と、配線ケーブル１９を介して前記ボツクス１８
から吊下げる操作スイツチボツクス２０とを前記
チエンブロツク１４に備える。そして前記チエン
ブロツク１４の可逆モータ１７を正逆転させて前
記フツク１５を昇降させる正逆転手動操作スイツ
チ２１，２２と、前記トロリー８の可逆モータ１
０を正逆転させてトロリー８を左右に移動させる
正逆転手動操作スイツチ２３，２４と、前記サド
ル５の可逆モータ７を正逆転させてサドル５を前
後に移動させる正逆転手動操作スイツチ２５，２
６とを前記操作スイツチボツクス２０に備え、前
記チエンブロツク１４による荷物の吊上げ及び吊
下し作業並びに前記サドル５及びトロリー８によ
る荷物の前後左右移動作業などの荷役作業を行う
ように構成する。 Embodiments of the present invention will be described in detail below based on the drawings. As shown in FIGS. 1 to 3, a pair of left and right running rails 3, 3 are installed approximately parallel to construction supports 1 of a factory etc. via beam members 2, and both ends of an H-shaped steel beam 4 are installed. Electric saddles 5, 5 for connecting and fixing are placed on each rail 3, 3. The saddle 5 is equipped with wheels 6 to be fitted on the rails 3 and a reversible motor 7 for driving the wheels 6.
The beam 4 is formed so as to move forward and backward by rotating the beam forward and backward. Further, an electric trolley 8 is supported by the beam 4 horizontally suspended at an appropriate height, and the trolley 8 is provided with wheels 9 fitted to the beam 4 and a reversible motor 10 for driving the wheels 9.
The motor 10 is configured to move forward and backward to move the trolley 8 left and right. Furthermore, an electric chain block 14 is attached to the lower end of the main body frames 13, 13 of the trolley 8 via a support shaft 11 and a hanging metal fitting 12.
a load chain 16 which is capable of swinging back and forth and from side to side and has a load hanging hook 15; and a reversible motor 17 which operates the chain 16 to be hoisted and hoisted down.
and a power distribution box 18 for controlling the motor 17.
and the box 18 via the wiring cable 19.
The chain block 14 is provided with an operation switch box 20 suspended from the chain block 14. and forward/reverse manual operation switches 21 and 22 for moving the reversible motor 17 of the chain block 14 forward and reverse to raise and lower the hook 15; and reversible motor 1 of the trolley 8.
forward/reverse manual operation switches 23, 24 that rotate the trolley 8 in the forward and reverse directions to move the trolley 8 left and right, and forward/reverse manual operation switches 25, 2 that rotate the reversible motor 7 of the saddle 5 in the forward and reverse directions to move the saddle 5 back and forth.
6 is provided in the operation switch box 20, and is configured to carry out cargo handling operations such as lifting and lowering of cargo using the chain block 14 and moving the cargo back and forth and left and right using the saddle 5 and trolley 8.

第４図及び第５図に示す如く、上記チエンブロ
ツク１４の可逆モータ１０のドライブシヤフト２
７に小径の第１ギヤ２８を形成し、前記第１ギヤ
２８に大径の第２ギヤ２９を常時噛合させ、前記
第２ギヤ２９を支承させる回転軸３０に左ネジ３
１を形成し、その左ネジ３１に第２ギヤ２９を螺
合枢支させると共に、前記第２ギヤ２９の螺合対
向方向の回転軸３０にブレーキハブ３２を固定さ
せ、第２ギヤ２９とブレーキハブ３２の間に摩擦
板３３，３４を介在させて爪車３５を狭着状に設
け、前記爪車３５に係脱させる爪３６を取付け、
左ネジ３１が第２ギヤ２９に螺入する回転軸３０
の回転方向と同一方向の爪車３５の回転を阻止
し、ロードチエン１６先端のフツク１５に荷物を
吊下げた状態でロードチエン１６を固定維持可能
に形成する。また前記回転軸３０に小径の第３ギ
ヤ３７を形成し、前記ドライブシヤフト２７と同
一軸芯上に筒軸３８を支承させ、前記第３ギヤ３
７に噛合させる大径の第４ギヤ３９並びにロード
チエン１６を噛合させるチエンホイール４０を前
記筒軸３８に一体的に夫々形成すると共に、前記
チエンホイール４０下方の本体フレーム４１，４
２間にチエンガイド４３を設け、一方の本体フレ
ーム４１外側にリミツトスイツチボツクス４４を
取付ける。 As shown in FIGS. 4 and 5, the drive shaft 2 of the reversible motor 10 of the chain block 14
A small-diameter first gear 28 is formed at 7, a large-diameter second gear 29 is always meshed with the first gear 28, and a left-handed thread 3 is attached to a rotating shaft 30 that supports the second gear 29.
1, and a second gear 29 is screwed and pivotally supported on the left-hand thread 31, and a brake hub 32 is fixed to a rotating shaft 30 in the opposite direction to which the second gear 29 is screwed, so that the second gear 29 and the brake are connected. Friction plates 33 and 34 are interposed between the hub 32, and a ratchet wheel 35 is provided in a narrow manner, and a pawl 36 for engaging and disengaging the ratchet wheel 35 is attached.
A rotating shaft 30 with a left-hand screw 31 screwed into the second gear 29
The rotation of the ratchet wheel 35 in the same direction as the rotation direction of the load chain 16 is prevented, and the load chain 16 can be fixedly maintained in a state where the load is suspended from the hook 15 at the tip of the load chain 16. Further, a small-diameter third gear 37 is formed on the rotating shaft 30, and a cylindrical shaft 38 is supported on the same axis as the drive shaft 27.
A large-diameter fourth gear 39 that meshes with the chain wheel 7 and a chain wheel 40 that meshes with the road chain 16 are integrally formed on the cylindrical shaft 38, and the main body frames 41, 4 below the chain wheel 40 are formed integrally with the cylinder shaft 38.
A chain guide 43 is provided between the two, and a limit switch box 44 is attached to the outside of one main body frame 41.

第６図及び第７図に示す如く、四角枠フレーム
４５と、該フレーム４５に固定してボルト４６，
４６を用いてセンシングシヤフト４７を貫挿固定
させるボス４８と、前記フレーム４５の長孔４
９，５０にピン５１，５２を遊嵌挿入させて取付
ける上昇及び下降ガイド筒５３，５４とによつて
前記チエンガイド４３を構成すると共に、上記チ
エンホイール４０に中間を係合させるロードチエ
ン１６の両側を前記ガイド筒５３，５４の十字形
孔５５，５６に挿入させ、前記ロードチエン１６
両側端にストツパ５７，５８を取付け、且つ前記
チエン１６両側端部に緩衝バネ５９，６０を巻装
させ、前記ロードチエン１６の上下限作動時にバ
ネ５９，６０を介してストツパ５７，５８がガイ
ド筒５３，５４に当接するように形成する。また
前記センシングシヤフト４７を支承させるセンシ
ングブラケツト６１を上記本体フレーム４１外側
に固定させ、前記センシングシヤフト４７に固定
する揺動規制リンク６２を介して該シヤフト４７
に挟みバネ形水平維持バネ６３の支持力を附勢
し、前記チエンガイド４５を略水平に支持した状
態でロードチエン１６を昇降させるように形成す
ると共に、正逆転操作リミツトスイツチ６４，６
５を有する第１ロータリスイツチ６６と、正逆転
リミツトスイツチ６７，６８及び６９，７０を有
する第２及び第３ロータリスイツチ７１及び７２
とを前記センシングブラケツト６１に固設させ、
前記ブラケツト６１及び各ロータリスイツチ６
６，７１，７２を上記リミツトスイツチボツクス
４４に内蔵する。 As shown in FIGS. 6 and 7, a rectangular frame 45, bolts 46 fixed to the frame 45,
A boss 48 through which the sensing shaft 47 is inserted and fixed using the long hole 4 of the frame 45.
The chain guide 43 is constituted by the lifting and lowering guide tubes 53 and 54, which are attached by loosely inserting pins 51 and 52 into the chains 9 and 50. Both sides are inserted into the cross-shaped holes 55, 56 of the guide tubes 53, 54, and the load chain 16 is inserted into the guide tubes 53, 54.
Stoppers 57, 58 are attached to both ends, and buffer springs 59, 60 are wound around both ends of the chain 16, so that the stoppers 57, 58 are guided through the springs 59, 60 when the load chain 16 is operated at its upper and lower limits. It is formed so as to come into contact with the cylinders 53 and 54. Further, a sensing bracket 61 that supports the sensing shaft 47 is fixed to the outside of the main body frame 41, and the shaft 47 is fixed to the sensing shaft 47 via a swing regulating link 62 fixed to the sensing shaft 47.
The support force of the horizontal maintenance spring 63 of the sandwich spring type is energized to raise and lower the load chain 16 while supporting the chain guide 45 substantially horizontally, and the forward/reverse operation limit switches 64, 6
5, and second and third rotary switches 71 and 72, which have forward/reverse limit switches 67, 68 and 69, 70.
and fixed to the sensing bracket 61,
The bracket 61 and each rotary switch 6
6, 71, and 72 are built into the limit switch box 44.

第８図乃至第１０図に示す如く、固定接点７３
…及び可動接点７４…を上記の各リミツトスイツ
チ６４，６５，６７，６８，６９，７０に夫々備
え、固定接点７３に可動接点７４を圧着させるバ
ネ７５力を可動接点７４に附勢すると共に、第１
ロータリスイツチ６６に備える長尺カムフロアを
有する大幅扇形の第１カム７６と、第２及び第３
ロータリスイツチ７１，７２に備える短尺カムフ
ロアを有する小幅扇形の第２及び第３カム７７，
７８とを上記センシングシヤフト４７に係合軸支
させ、上記チエンガイド４３の揺動と連動して各
カム７６，７７，７８を回転させるように形成す
る。前記の逆転操作及び逆転リミツトスイツチ６
５及び６８，７０の可動接点７４…に摺動体７９
…を当接させ、前記の正転操作及び正転リミツト
スイツチ６４及び６７，６９の可動接点７４…を
角柱状の摺動シヤフト８０…の中間に固定させる
と共に、前記第１乃至第３カム７６，７７，７８
を圧接させるプレツシヤロール８１…を前記摺動
体７９…及び摺動シヤフト８０…の先端に取付
け、上記ロードチエン１６端部のストツパ５７，
５８がガイド筒５３，５４に当接してチエンガイ
ド４３が揺動したとき、センシングシヤフト４７
の回転によつて第１カム７６を介して正転操作或
いは逆転操作リミツトスイツチ６４或いは６５を
オフ作動させ、さらに前記チエンガイド４３が揺
動してセンシングシヤフト４７が回転したとき、
第２及び第３カム７７，７８を介して正転リミツ
トスイツチ６７，６９或いは逆転リミツトスイツ
チ６８，７０をオフ作動させ、チエンブロツク１
４の可逆モータ１７の正逆転動作限界で正逆転操
作リミツトスイツチ６４，６５がオフ作動後に遅
延して正逆転リミツトスイツチ６７，６９及び６
８，７０がオフ作動するように形成する。さらに
前記正転リミツトスイツチ６７，６９の可動接点
７４…を固定接点７３に対して離反維持して非導
電保持するロツクレバー８２，８３を設け、前記
ロツクレバー８２，８３の貫通孔８４…に上記摺
動シヤフト８０…を挿通させ、前記シヤフト８０
…のノツチ８５…に係入させる舌片８６…をロツ
クレバー８２，８３の貫通孔８４…口縁に形成す
ると共に、前記ノツチ８５…に舌片８６…を係合
保持するバネ８７…力をロツクレバー８２，８３
に附勢し、また前記ロツクレバー７２，８３を摺
動案内及び規制するためのガイド溝８８…に突条
８９…を嵌着させ、前記摺動シヤフト８０の後退
によつてノツチ８５に舌片８６が係合して正転リ
ミツトスイツチ６７，６８の可動接点７４…を固
定接点７３…に対して離反支持するように形成す
る。 As shown in FIGS. 8 to 10, the fixed contact 73
... and a movable contact 74... are respectively provided in each of the limit switches 64, 65, 67, 68, 69, 70, and a spring 75 force is applied to the movable contact 74 to press the movable contact 74 to the fixed contact 73. 1
The rotary switch 66 includes a first cam 76 having a long cam floor and a second and third cam 76 having a large fan shape.
Narrow fan-shaped second and third cams 77 having short cam floors provided for rotary switches 71 and 72;
78 is engaged and pivotally supported by the sensing shaft 47, and each cam 76, 77, 78 is formed to rotate in conjunction with the swinging of the chain guide 43. The aforementioned reverse operation and reverse limit switch 6
A sliding body 79 is attached to the movable contacts 74 of 5, 68, and 70.
... are brought into contact with each other, and the movable contacts 74 of the normal rotation operation and normal rotation limit switches 64, 67, 69 are fixed in the middle of the prismatic sliding shaft 80, and the first to third cams 76, 77, 78
Pressure rolls 81... are attached to the tips of the sliding bodies 79... and the sliding shafts 80..., and the stoppers 57 at the ends of the load chain 16,
58 comes into contact with the guide cylinders 53 and 54 and the chain guide 43 swings, the sensing shaft 47
When the forward rotation operation or reverse rotation operation limit switch 64 or 65 is turned off by the rotation of the first cam 76, and the chain guide 43 swings and the sensing shaft 47 rotates,
The forward rotation limit switches 67, 69 or the reverse rotation limit switches 68, 70 are turned off via the second and third cams 77, 78, and the chain block 1 is turned off.
At the forward and reverse operation limit of the reversible motor 17 of No. 4, the forward and reverse operation limit switches 64 and 65 are delayed after turning off, and the forward and reverse rotation limit switches 67, 69 and 6 are turned off.
8 and 70 are formed so that they are turned off. Furthermore, lock levers 82 and 83 are provided to keep the movable contacts 74 of the normal rotation limit switches 67 and 69 separated from the fixed contact 73 and non-conductive, and the sliding shafts are inserted into the through holes 84 of the lock levers 82 and 83. 80... is inserted into the shaft 80.
A tongue piece 86 that engages the notch 85 of... is formed on the mouth edge of the through hole 84 of the lock levers 82, 83, and a spring 87 that engages and holds the tongue piece 86 with the notch 85... applies the force to the lock lever. 82, 83
The protrusions 89 are fitted into the guide grooves 88 for energizing the lock levers 72 and 83 and for guiding and regulating the sliding movement of the lock levers 72 and 83, and as the sliding shaft 80 retreats, the tongue pieces 86 are attached to the notches 85. are engaged to support the movable contacts 74 of the normal rotation limit switches 67, 68 away from the fixed contacts 73.

第１１図に示す如く、上記チエンブロツク１４
の可逆モータ１７を正転させてロードチエン１６
を巻上げるための正転リレー９０と、前記可逆モ
ータ１７を逆転させてロードチエン１６を巻下す
ための逆転リレー９１とを備え、上記正逆転手動
操作スイツチ２１，２２及び正逆転操作リミツト
スイツチ６４．６５を介して前記正逆転リレー９
０，９１の正逆転リレーコイル９２，９３にこの
操作電源９４を接続させると共に、上記正転及び
逆転リミツトスイツチ６７，６９及び６８，７０
並びに前記正逆転リレー９０，９１の正逆転スイ
ツチ９５，９６を介して前記可逆モータ１７にこ
の駆動電源（R.S.T）を接続させ、上記ロツクレ
バー８２，８３を備えたオフ自己保持型の正転リ
ミツトスイツチ６７，６９のオフ作動によつて正
転スイツチ９５を非導電保持した状態で、前記逆
転スイツチ９６を介して可逆モータ１７を一方向
にのみ任意に逆転駆動可能に構成し、例えば荷物
を吊上げて正転リミツトスイツチ６７，６９が作
動したとき、逆転手動操作スイツチ２２のオン操
作によつて逆転スイツチ９６を介して前記モータ
１７を逆転させ、ロードチエン１６を巻下して荷
物を降下させる一方、前記逆転リミツトスイツチ
６８，７０を介して正転リミツトスイツチ６７，
６９を前記駆動電源（Ｓ，Ｔ）に接続させ、前記
正転リミツトスイツチ６７，６９作動時に正転ス
イツチ９５のみを、また逆転リミツトスイツチ６
８，７０作動時に正転及び逆転スイツチ９５，９
６を非導電状態に夫々保持するように形成するも
のである。 As shown in FIG. 11, the chain block 14
The reversible motor 17 is rotated forward and the load chain 16 is
and a reversing relay 91 for reversing the reversible motor 17 to lower the load chain 16. The forward/reverse relay 9 via 65
This operation power source 94 is connected to the forward and reverse rotation relay coils 92 and 93 of 0 and 91, and the forward and reverse rotation limit switches 67, 69 and 68, 70
Further, this drive power supply (RST) is connected to the reversible motor 17 via the forward/reverse switches 95, 96 of the forward/reverse relays 90, 91, and an OFF self-holding forward rotation limit switch 67 is provided with the lock levers 82, 83. , 69 are turned off to keep the forward rotation switch 95 non-conductive, the reversible motor 17 can be arbitrarily driven in reverse only in one direction via the reverse rotation switch 96. For example, when lifting a load, When the rotation limit switches 67, 69 are activated, the manual reverse operation switch 22 is turned on to reverse the motor 17 via the reverse switch 96, lowering the load chain 16 and lowering the load, while Normal rotation limit switch 67 via limit switches 68, 70,
69 are connected to the drive power sources (S, T), and when the forward rotation limit switches 67 and 69 are activated, only the forward rotation switch 95 is activated, and the reverse rotation limit switch 6 is activated.
Forward and reverse rotation switch 95,9 when 8,70 is activated
6 are formed so as to maintain each in a non-conductive state.

本考案は上記の如く構成しており、上記操作ス
イツチボツクス２０の正逆転手動操作スイツチ２
３，２４，２５，２６を押してサドル５及びトロ
リー８を前後及び左右に移動させ、チエンブロツ
ク１４を任意の場所に位置させてロードチエン１
６先端のフツク１５に吊る荷物を昇降させるもの
で、前記スイツチボツクス２０の正転手動操作ス
イツチ２１を押すと、正転リレー９０のリレーコ
イル９２の励磁によつて正転スイツチ９５がオン
作動し、可逆モータ１７を正転させてロードチエ
ン１６を巻上げ、フツク１５に吊下げた荷物を希
望する高さに上昇させる。このときにロードチエ
ン１６の巻上げ上限でフツク１５基端のストツパ
５７が緩衝バネ５９を介してガイド筒５３に当接
すると、センシングシヤフト４７の回転により正
転操作リミツトスイツチ６４の摺動シヤフト８０
を第１カム７６によつて変位させ、前記スイツチ
６４をオフにして可逆モータ１７を停止させるも
ので、前記正転スイツチ９５が焼損して溶着する
と、正転操作リミツトスイツチ６４のオフ作動時
に前記モータ１７が停止することなくロードチエ
ン１６を更に巻上げるが、前記ロードチエン１６
の巻上げに伴うセンシングシヤフト４７の回転に
より、正転リミツトスイツチ６７，６９の摺動シ
ヤフト８０，８０を第２及び第３カム７７，７８
によつて変位させ、ロツクレバー８２，８３が前
記シヤフト８０，８０に係合し、前記スイツチ６
７，６９をオフ保持して可逆モータ１７を停止さ
せる。前記のようにロツクレバー８２，８３によ
つて正転リミツトスイツチ６７，６９をオフ維持
して正転スイツチ９５を非導電状態とした場合、
逆転手動操作スイツチ２２を押して逆転リレー９
１の逆転リレーコイル９３を励磁させ、逆転スイ
ツチ９６をオン作動させて前記可逆モータ１７を
逆転させ、ロードチエン１６を巻下してフツク１
５の荷物を降下させると共に、溶着した前記正転
リレー９０を修理し、前記ロツクレバー８２，８
３を押してノツチ８５…及び舌片８６…の係合を
解除させ、正転リミツトスイツチ６７，６９をオ
ン復帰させて正転手動操作スイツチ２１による可
逆モータ１７の正転駆動を可能とする。前記のよ
うに正転スイツチ９５が溶着して正転リミツトス
イツチ６７，６９がオフ作動したとき、逆転リレ
ー９１による可逆モータ１７の逆転動作によつて
正転リミツトスイツチ６７，６９が自動的にオン
復帰することなく、溶着した正転スイツチ９５に
よる駆動電源（Ｒ，Ｓ，Ｔ）の短絡事故を阻止
し、可逆モータ１７の逆転駆動のみを任意に行え
るものである。 The present invention is constructed as described above, and the forward/reverse manual operation switch 2 of the operation switch box 20 is configured as described above.
3, 24, 25, and 26 to move the saddle 5 and trolley 8 back and forth and left and right, position the chain block 14 at an arbitrary position, and set the load chain 1.
When the forward rotation manual operation switch 21 of the switch box 20 is pressed, the forward rotation switch 95 is turned on by excitation of the relay coil 92 of the forward rotation relay 90. , the reversible motor 17 is rotated in the normal direction to wind up the load chain 16, and the load suspended from the hook 15 is raised to a desired height. At this time, when the stopper 57 at the base end of the hook 15 contacts the guide tube 53 via the buffer spring 59 at the upper limit of hoisting the load chain 16, the sliding shaft 80 of the normal rotation operation limit switch 64 is rotated by the rotation of the sensing shaft 47.
is displaced by the first cam 76, and the switch 64 is turned off to stop the reversible motor 17. If the forward rotation switch 95 is burnt out and welded, the motor will be turned off when the forward rotation operation limit switch 64 is turned off. 17 further winds up the load chain 16 without stopping, but the load chain 16
The rotation of the sensing shaft 47 accompanying the winding of the forward rotation limit switches 67, 69 causes the sliding shafts 80, 80 of the forward rotation limit switches 67, 69 to move into the second and third cams 77, 78.
The lock levers 82 and 83 engage the shafts 80 and 80, and the switch 6
7 and 69 are kept off to stop the reversible motor 17. When the forward rotation limit switches 67 and 69 are kept off by the lock levers 82 and 83 as described above, and the forward rotation switch 95 is brought into a non-conductive state,
Press reverse manual operation switch 22 to turn reverse relay 9 on.
The reversing relay coil 93 of No. 1 is energized, the reversing switch 96 is turned on, the reversible motor 17 is reversed, the load chain 16 is lowered, and the hook No. 1 is lowered.
At the same time, the welded normal rotation relay 90 is repaired, and the lock levers 82, 8 are lowered.
3 to release the engagement of the notches 85 and the tongues 86, turn the forward rotation limit switches 67 and 69 back on, and enable the forward rotation manual operation switch 21 to drive the reversible motor 17 in the forward rotation. As described above, when the forward rotation switch 95 is welded and the forward rotation limit switches 67, 69 are turned off, the forward rotation limit switches 67, 69 are automatically turned back on by the reverse operation of the reversible motor 17 by the reverse rotation relay 91. This prevents a short-circuit accident of the drive power sources (R, S, T) due to the welded forward rotation switch 95, and allows the reversible motor 17 to be driven only in the reverse direction as desired.

また、上記スイツチボツクス２０の逆転手動操
作スイツチ２２を押すと、逆転リレー９１のリレ
ーコイル９３の励磁によつて逆転スイツチ９６が
オン作動し、可逆モータ１７を逆転させてロード
チエン１６を巻下し、フツク１５に吊下げた荷物
を降下させる。このときに前記ロードチエン１６
の巻下し下限でチエン１６端部のストツパ５８が
緩衝バネ６０を介してガイド筒５４に当接する
と、センシングシヤフト４７の回転により逆転操
作リミツトスイツチ６５の摺動体７９を第１カム
７６によつて変位させ、前記スイツチ６５をオフ
作動して可逆モータ１７を停止させるもので、前
記逆転スイツチ９６が焼損して溶着すると、逆転
操作リミツトスイツチ６５のオフ作動時に前記モ
ータ１７が停止することなくロードチエン１６を
更に巻下すが、前記ロードチエン１６の巻下しに
伴うセンシングシヤフト４７の回転により、逆転
リミツトスイツチ６８，７０の摺動体７９，７９
を第２及び第３カム７７，７８によつて変位さ
せ、フツク１５を下限降下させた状態で前記モー
タ１７を停止させる。前記のように逆転操作リミ
ツトスイツチ６８，７０がオフ作動すると、逆転
スイツチ９６の非導電保持と同時に、前記スイツ
チ６８，７０に正転操作リミツトスイツチ６７，
６９を介して接続する正転スイツチ９５も非導電
保持するもので、逆転スイツチ９６の溶着時にロ
ードチエン１６のフツク１５を最大に降下させた
状態で正転及び逆転スイツチ９５，９６による可
逆モータ１７の正逆転駆動を阻止し、溶着した前
記逆転リレー９１を修理するものである。 Further, when the reverse manual operation switch 22 of the switch box 20 is pressed, the reverse switch 96 is turned on by the excitation of the relay coil 93 of the reverse relay 91, and the reversible motor 17 is reversed to lower the load chain 16. , the load suspended from the hook 15 is lowered. At this time, the road chain 16
When the stopper 58 at the end of the chain 16 contacts the guide cylinder 54 via the buffer spring 60 at the lower limit of lowering, the rotation of the sensing shaft 47 causes the sliding body 79 of the reverse operation limit switch 65 to be moved by the first cam 76. When the reversing switch 96 is burnt out and welded, the motor 17 will not stop when the reversing operation limit switch 65 is turned off, and the reversible motor 17 will be stopped. is further lowered, but due to the rotation of the sensing shaft 47 accompanying the lowering of the load chain 16, the sliding bodies 79, 79 of the reverse limit switches 68, 70
is displaced by the second and third cams 77, 78, and the motor 17 is stopped with the hook 15 lowered to its lower limit. When the reverse rotation operation limit switches 68 and 70 are turned off as described above, the reverse rotation operation limit switches 67 and 70 are turned off at the same time as the reverse rotation switch 96 is held non-conductive.
The forward rotation switch 95 connected through 69 is also kept non-conductive, and when the reverse rotation switch 96 is welded, the reversible motor 17 is operated by the forward rotation and reverse rotation switches 95 and 96 with the hook 15 of the load chain 16 lowered to the maximum. This is to prevent the forward/reverse drive of the reversing relay 91 and repair the welded reversing relay 91.

なお、上記実施例においてチエンブロツク１４
の可逆モータ１７を制御したが、走行レール３の
前後端にサドル５が移動時、正逆転操作及び正逆
転リミツトスイツチ６４，６５及び６７，６８，
６９，７０が上記実施例と同様に多段的に遅延し
て作動するように組込むことにより、サドル５の
可逆モータ７もチエンブロツク１４と同様に制御
することも行えると共に、ビーム４の左右端にト
ロリー８が移動時、前記の各リミツトスイツチ６
４，６５及び６７，６８，６９，７０を同様に作
動させるように組込むことにより、トロリー８の
可逆モータ１０も上記実施例と同様に制御するこ
とも容易に行えるものである。 In addition, in the above embodiment, the chain block 14
However, when the saddle 5 moves to the front and rear ends of the traveling rail 3, the forward/reverse operation and the forward/reverse limit switches 64, 65, 67, 68,
By incorporating the motors 69 and 70 so that they operate with multiple stages of delay in the same way as in the above embodiment, the reversible motor 7 of the saddle 5 can also be controlled in the same manner as the chain block 14. When the trolley 8 moves, each of the limit switches 6
By assembling motors 4, 65, 67, 68, 69, and 70 so as to operate in the same manner, the reversible motor 10 of the trolley 8 can also be easily controlled in the same manner as in the above embodiment.

以上実施例から明らかなように本考案は、正逆
転手動操作スイツチ２１，２２と正逆転リレーコ
イル９２，９３との間に組込む正逆転操作リミツ
トスイツチ６４，６５を、前記正逆転リレーコイ
ル９２，９３によつて切換える正逆転スイツチ９
５，９６と可逆モータ１７の駆動電源（R.S.T）
との間に組込む正逆転リミツトスイツチ６７，６
８，６９，７０よりも若干早くオフ作動させるべ
く、正逆転操作及び正逆転の各リミツトスイツチ
６４，６５及び６７，６８，６９，７０を第１及
び第２カム７６，７７を介して連結させ、可逆モ
ータ１７の正逆転動作限界で正逆転操作リミツト
スイツチ６４，６５がオフ作動後に遅延して正逆
転リミツトスイツチ６７，６８，６９，７０がオ
フ作動するように構成するもので、前記正逆転ス
イツチ９５，９６が正常に作動しているときは手
動操作用の低電圧低電流を制御する正逆転操作ス
イツチ２１，２２を介して従来と同様に荷役作業
を繰返し行うことができ、また前記正逆転スイツ
チ９５，９６が溶着した場合などに可逆モータ１
７駆動用の高電圧高電流を制御する正逆転リミツ
トスイツチ６７，６８，６９，７０を介して可逆
モータ１７をこの正逆転動作限界で確実に停止さ
せることができ、前記可逆モータ１７の作動状況
に応じて多段的に安全にこの停止を図ることがで
きると共に、前記正逆転操作リミツトスイツチ６
４，６５がオフ作動しないときの安全スイツチ部
材として前記正逆転リミツトスイツチ６７，６
８，６９，７０を兼用でき、また前記第１及び第
２カムを用いた簡単な構成で正逆転操作及び正逆
転の各リミツトスイツチを連動させることができ
て頗る実用的である等の顕著な効果を奏するもの
である。 As is clear from the above embodiments, the present invention provides forward and reverse operation limit switches 64 and 65 that are incorporated between the forward and reverse manual operation switches 21 and 22 and the forward and reverse relay coils 92 and 93. Forward/reverse switch 9
Drive power supply (RST) for 5, 96 and reversible motor 17
Forward/reverse limit switch 67, 6 installed between
8, 69, 70, the forward/reverse operation and forward/reverse limit switches 64, 65 and 67, 68, 69, 70 are connected via first and second cams 76, 77, It is configured such that at the forward/reverse operation limit of the reversible motor 17, the forward/reverse operation limit switches 64, 65 are turned off, and then the forward/reverse limit switches 67, 68, 69, 70 are turned off with a delay. When the forward/reverse switch 96 is operating normally, cargo handling operations can be performed repeatedly as in the past via the forward/reverse operation switches 21 and 22 that control low voltage and low current for manual operation, and the forward/reverse switch 95 , 96 are welded, the reversible motor 1
The reversible motor 17 can be reliably stopped at this forward and reverse operation limit through the forward and reverse limit switches 67, 68, 69, and 70 that control the high voltage and high current for driving the motor. Accordingly, this can be safely stopped in multiple stages, and the forward/reverse operation limit switch 6
The forward/reverse limit switches 67, 6 serve as safety switch members when the switches 4, 65 do not turn off.
8, 69, and 70, and a simple configuration using the first and second cams allows forward/reverse operation and forward/reverse limit switches to be interlocked, making it very practical. It is something that plays.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例を示す全体の正面
図、第２図は同平面図、第３図は同側面図、第４
図はチエンブロツク断面図、第５図はその分解説
明図、第６図は部分拡大平面図、第７図は作動説
明図、第８図は部分拡大分解図、第９図はその作
動説明図、第１０図は部分拡大断面図、第１１図
は電気回路図である。 １７……可逆モータ、２１……正転手動操作ス
イツチ、２２……逆転手動操作スイツチ、６４…
…正転操作リミツトスイツチ、６５……逆転操作
リミツトスイツチ、６７，６９……正転リミツト
スイツチ、６８，７０……逆転リミツトスイツ
チ、７６……第１カム、７７……第２カム、９２
……正転リレーコイル、９３……逆転リレーコイ
ル、９５……正転スイツチ、９６……逆転スイツ
チ、（R.S，Ｔ）……駆動電源。 Fig. 1 is an overall front view showing one embodiment of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a side view of the same, and Fig. 4 is a front view of the entire embodiment of the present invention.
The figure is a sectional view of the chain block, Fig. 5 is an exploded explanatory view thereof, Fig. 6 is a partially enlarged plan view, Fig. 7 is an explanatory diagram of operation, Fig. 8 is a partially enlarged exploded view, and Fig. 9 is an explanatory diagram of its operation. , FIG. 10 is a partially enlarged sectional view, and FIG. 11 is an electric circuit diagram. 17...Reversible motor, 21...Forward rotation manual operation switch, 22...Reverse rotation manual operation switch, 64...
...Forward rotation operation limit switch, 65...Reverse rotation operation limit switch, 67, 69...Forward rotation limit switch, 68, 70...Reverse rotation limit switch, 76...First cam, 77...Second cam, 92
...Forward rotation relay coil, 93...Reverse rotation relay coil, 95...Forward rotation switch, 96...Reverse rotation switch, (RS, T)...Drive power supply.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 三相交流電源Ｒ，Ｓ，Ｔをチエンブロツク１４
の可逆モータ１７に正逆転リレー９０，９１を介
して印加させると共に、前記リレー９０，９１の
正逆転リレーコイル９２，９３に正逆転操作リミ
ツトスイツチ６４，６５を介して正逆転手動操作
スイツチ２１，２２を接続させ、また前記正転リ
レー９０の正転スイツチ９５に正転及び逆転リミ
ツトスイツチ６７，６９及び６８，７０を介して
三相交流電源Ｓ，Ｔを接続させると共に、前記逆
転リレー９１の逆転スイツチ９６に逆転リミツト
スイツチ６８，７０を介して三相交流電源Ｓ，Ｔ
を接続させた荷役作業機において、前記チエンブ
ロツク１４のロードチエン１６に吊下げたフツク
１５の上昇及び下降限度位置で回転するセンシン
グシヤフト４７に、第１・第２・第３カム７６，
７７，７８を係合軸支し、長尺カムフロアを有す
る第１カム７６を取付けた前記シヤフト４７の外
周に前記正逆転操作リミツトスイツチ６４，６５
を対向状に配設させ、また短尺カムフロアを有す
る第２カム７７を取付けた前記シヤフト４７の外
周に前記正逆転リミツトスイツチ６７，６８を対
向状に配設させ、さらに短尺カムフロアを有する
第３カム７８を取付けた前記シヤフト４７の外周
に前記正逆転リミツトスイツチ６９，７０を対向
状に配設させ、前記正逆転操作リミツトスイツチ
６４，６５を前記正逆転リミツトスイツチ６７，
６９及び６８，７０よりも若干早くオフ作動させ
るべく、正逆転操作及び正逆転の各リミツトスイ
ツチ６４，６５及び６７，６８，６９，７０を第
１及び第２・第３カム７６及び７７，７８を介し
て連動させ、可逆モータ１７の正逆転動作限界で
正逆転操作リミツトスイツチ６４，６５がオフ作
動後に遅延して正逆転リミツトスイツチ６７，６
９，６８，７０がオフ作動するように構成したこ
とを特徴とする荷役作業機用駆動装置。 Connect the three-phase AC power supply R, S, and T to the chain block 14.
The power is applied to the reversible motor 17 via the forward/reverse relays 90, 91, and the forward/reverse manual operation switches 21, 22 are applied to the forward/reverse relay coils 92, 93 of the relays 90, 91 via the forward/reverse operation limit switches 64, 65. The forward rotation switch 95 of the forward rotation relay 90 is connected to the three-phase AC power supplies S and T via the forward rotation and reverse rotation limit switches 67, 69 and 68, 70, and the reverse rotation switch of the reversal relay 91 is connected. 96, three-phase AC power supply S, T via reverse limit switch 68, 70
In this cargo handling machine, first, second and third cams 76,
The forward/reverse operation limit switches 64, 65 are attached to the outer periphery of the shaft 47, on which the first cam 76 having a long cam floor is attached.
The forward/reverse limit switches 67 and 68 are arranged oppositely on the outer periphery of the shaft 47 to which a second cam 77 having a short cam floor is attached, and a third cam 78 having a short cam floor. The forward/reverse limit switches 69, 70 are arranged facing each other on the outer periphery of the shaft 47 to which the forward/reverse operation limit switches 64, 65 are connected.
In order to turn off the switch slightly earlier than 69, 68, and 70, each limit switch 64, 65 and 67, 68, 69, 70 for forward/reverse operation and forward/reverse rotation is set to the first, second, and third cams 76, 77, and 78. At the forward/reverse operation limit of the reversible motor 17, the forward/reverse operation limit switches 64, 65 are delayed after being turned off, and the forward/reverse limit switches 67, 6 are turned off.
1. A drive device for a cargo handling machine, characterized in that parts 9, 68, and 70 are configured to be turned off.