JPS63143199A - Overload preventive device for winding machine - Google Patents
Overload preventive device for winding machineInfo
- Publication number
- JPS63143199A JPS63143199A JP28952486A JP28952486A JPS63143199A JP S63143199 A JPS63143199 A JP S63143199A JP 28952486 A JP28952486 A JP 28952486A JP 28952486 A JP28952486 A JP 28952486A JP S63143199 A JPS63143199 A JP S63143199A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- gear
- load
- transmission body
- transmission gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Transmission Devices (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は捲上機の過負荷防止装置、詳しくは、定格負荷
以上の荷重が作用した状態での捲1−げを防止する捲上
機の過負荷防止装置に関する。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to an overload prevention device for a hoisting machine, and more particularly, to a hoisting machine that prevents hoisting from overloading when a load exceeding the rated load is applied. This invention relates to an overload prevention device.
(従来の技術)
従来、この種過負荷防止袋Uは、例えば実開昭51−7
8380号公報に示される如<、捲上機における伝動軸
に、該伝動軸に遊嵌される伝動ギヤと前記伝動軸に軸方
向にのみ摺動可能に支持され、前記伝動ギヤと摩擦接触
する伝動体とこの伝動体を前記伝動ギヤに押圧する弾性
部材とを備えて成り、前記伝動ギヤが伝動体に対しスリ
ップするスリップ開始荷重を、前記伝動ギヤと伝動体と
の摩擦抵抗値により設定して、前記スリップ開姶荷重以
上の荷重が作用したときに、前記伝動ギヤと伝動体とを
スリップさせ、定格負荷以上の負荷の捲上げが行なえな
いように構成している。(Prior Art) Conventionally, this type of overload prevention bag U has been developed, for example, in U.S. Pat.
As shown in Japanese Patent No. 8380, a transmission gear loosely fitted onto a transmission shaft of a hoisting machine and a transmission gear supported slidably only in the axial direction by the transmission shaft and are in frictional contact with the transmission gear. It comprises a transmission body and an elastic member that presses the transmission body against the transmission gear, and a slip start load at which the transmission gear slips with respect to the transmission body is set by a frictional resistance value between the transmission gear and the transmission body. When a load equal to or higher than the slip opening load is applied, the transmission gear and the transmission body are caused to slip, so that a load higher than the rated load cannot be hoisted.
(発明が解決しようとする問題点)
ところが、前記した従来の過負荷防止装置のように、前
記伝動ギヤが伝動体に対しスリップするスリップ開始荷
重を、前記伝動ギヤと伝動体との摩擦抵抗値のみにより
設定する構成のものにあっては、前記スリップ開始荷重
をや\越えた程度の負荷が作用する状態のもとて荷物を
捲上げる際、つまり地切りを行なう際、前記スリップ開
始荷重と負荷との差が僅かであるため、前記伝動ギヤと
伝動体との滑りがごく僅かしか現われないのである。こ
のため、荷物の地切り時に過負荷を検出できす、過負荷
状態であるにも拘わらず、気づかずに捲上げを行なって
いるのが現状である。この結果、荷物を捲上げて宙吊り
状態を維持するような場合に、前記伝動ギヤと伝動体と
が徐々に滑り出し、その滑りがある程度行なわれて、摩
擦面が熱をもつと前記摩擦抵抗値が急景に低下し、前記
伝動ギヤと伝動体とが一気にスリップして荷物が落下す
る問題を有していた。(Problem to be Solved by the Invention) However, in the conventional overload prevention device described above, the slip starting load at which the transmission gear slips with respect to the transmission body is determined by the frictional resistance value between the transmission gear and the transmission body. If the load is set by only the above-mentioned slip start load, when hoisting the load under a condition where a load slightly exceeding the above-mentioned slip start load is applied, that is, when cutting off the ground, the above-mentioned slip start load and Since the difference between the load and the load is small, there is only a slight slippage between the transmission gear and the transmission body. For this reason, it is not possible to detect an overload when the load is being lifted off the ground, and the current situation is that the load is being hoisted up without being noticed even though the load is overloaded. As a result, when the load is hoisted up and suspended in the air, the transmission gear and the transmission body gradually start to slip, and when the sliding occurs to a certain extent and the friction surfaces become heated, the frictional resistance value increases. This has caused the problem that the transmission gear and the transmission body suddenly slip, causing the cargo to fall.
本発明の目的は、スリップ開始荷重量」二の負荷が作用
する状態での持上時、前記スIJ ノブ開始荷重と負荷
との差が僅かであっても、伝動ギヤと伝動体とを直ちに
、かつ−挙にスリップさせ、捲上げが行なえないように
して前記した従来の問題を解決しようとするものである
。An object of the present invention is to immediately prevent the transmission gear and the transmission body from slipping even if the difference between the slip start load and the load is small when the IJ knob is lifted under a load with a slip start load. This is an attempt to solve the above-mentioned conventional problems by causing the paper to slip all at once and preventing it from being rolled up.
(問題点を解決するための手段)
本発明は、駆動軸(60)の回転動力をロードシープ(
5)に伝達する捲上機における伝動軸(86)に、該伝
動軸(86)に遊嵌される伝動ギヤ(87)と前記伝動
軸(86)に軸方向のみ摺動可能に支持され、前記伝動
ギヤ(87)と摩擦接触する伝動体(22)とこの伝動
体(22)を前記伝動ギヤ(87)に押圧する弾性部材
(24)とを備えた過負荷防止装置において、前記伝動
ギヤ(87)と伝動体(22)との対向面の一方に係合
凹部(22c)を設け、他方に、前記係合凹部(22c
)に係合する係合体(27)と該係合体(27)を前記
保合四部(22c)の方向に付勢するばね(28)とを
設け、前記伝動ギヤ(87)が伝動体(22)に対しス
リップするスリップ開始荷重を、前記伝動ギヤ(87)
と伝動体(22)との摩擦抵抗値と、前記係合体(27
)の係合凹部(22c)との保合抵抗値とのトータルで
設定する如(したものである。(Means for Solving the Problems) The present invention provides rotational power of the drive shaft (60) using a load sheep (
5) is supported slidably only in the axial direction by a transmission gear (87) loosely fitted on the transmission shaft (86) and the transmission shaft (86); In an overload prevention device comprising a transmission body (22) that makes frictional contact with the transmission gear (87) and an elastic member (24) that presses the transmission body (22) against the transmission gear (87), the transmission gear (87) and the transmission body (22), an engagement recess (22c) is provided on one side, and the engagement recess (22c) is provided on the other side.
) and a spring (28) that biases the engaging body (27) in the direction of the four retaining parts (22c), and the transmission gear (87) is connected to the transmission body (22). ) to the transmission gear (87).
and the frictional resistance value between the transmission body (22) and the engagement body (27).
) and the engagement recess (22c) in total.
(作用)
上記構成により、前記スリップ開始荷重よりも大きな負
荷が作用する状態で捲上げを行なうと、前記係合体(2
7)かばね(28)に抗し、前記伝動ギヤ(87)又は
伝動体(22)の係合凹部(22c)から外れて該伝動
ギヤ(87)又は伝動体(22)の対向面に乗り上げる
如(移動し、この移動により前記係合体(27)と伝動
ギヤ(87)又は伝動体(22)との保合抵抗がなくな
り、つまり1r1記係合体(27)の前記対向面への当
接抵抗と、該係合体(27)の前記対向面への乗り−に
げに伴って誠少する前記伝動ギヤ(87)と伝動体(2
2)とによる摩擦抵抗とが作用することになり、このた
め、これら当接抵抗と摩擦抵抗とのトータルによるスリ
ップ阻止荷重が前記スリップ開始荷重に較べて低下し、
この結果、前記スリップ開始荷重と負荷との差が僅かで
あっても直ちに、かつ−挙に大きなスリップが発生して
捲上げが行なえなくなるのである。(Function) With the above configuration, when the engaging body (2
7) Resist the cover spring (28), come off the engagement recess (22c) of the transmission gear (87) or the transmission body (22), and ride on the opposing surface of the transmission gear (87) or the transmission body (22). (This movement eliminates the retention resistance between the engaging body (27) and the transmission gear (87) or the transmission body (22), that is, the contact resistance of the engaging body (27) of 1r1 to the opposing surface. The transmission gear (87) and the transmission body (2) decrease as the engaging body (27) rides on the opposing surface.
2), the frictional resistance due to the above-mentioned frictional resistance acts, and therefore, the slip prevention load resulting from the total of these contact resistance and frictional resistance is lower than the slip start load,
As a result, even if the difference between the slip start load and the load is small, a large slip occurs immediately and it becomes impossible to roll up the roll.
(実施例)
第4図に示すものは、本発明過負荷防止装置を装置した
電動式捲上機であって、該捲上機は所定間隔を置いて相
対向する一対の第1.第2サイドプレー) (1)(2
)の中心部に軸受(3)(4)を介してロードシープ(
5)を回転自由に支持すると共に、’+7if記各サイ
ドプレート(1)(2)のうち、第1サイドプレート(
1)の外側にモータ(6)を設け、該モータ(6)の駆
動軸(60)の一端を1】;I2第1サイドプレート(
1)に設ける軸受(7)により支持する一方、第2サイ
ドプレート(2)の外側に、減速歯車機構(8)とギヤ
ケース(80)及びブレーキ装置(9)を設け、かつ、
前記ギヤケース(80)と第2サイドプレート(2)と
の間に軸受(11)(12)を介して前記減速歯車機構
(8)の第1軸(81)を回転自由に支持し、この第1
軸(81)と前記駆動軸(60)との一端部を対向させ
て、これら対向部間に動力伝達機構(13)を設け、前
記駆動軸(60)の回転を、前記動力伝達機構(13)
から前記減速歯車機構(8)を介して前記ロードシープ
(5)に伝達すべく成している。(Embodiment) Fig. 4 shows an electric hoisting machine equipped with an overload prevention device of the present invention. 2nd side play) (1) (2
) through bearings (3) and (4) to the center of the load sheep (
5) is rotatably supported, and the first side plate (1) and (2) of the side plates (1) and (2) in '+7if
A motor (6) is provided outside of the motor (6), and one end of the drive shaft (60) of the motor (6) is connected to the first side plate (1);
1), while a reduction gear mechanism (8), a gear case (80), and a brake device (9) are provided on the outside of the second side plate (2), and
A first shaft (81) of the reduction gear mechanism (8) is rotatably supported between the gear case (80) and the second side plate (2) via bearings (11) and (12). 1
One end of the shaft (81) and the drive shaft (60) are opposed to each other, and a power transmission mechanism (13) is provided between these opposing parts, and the rotation of the drive shaft (60) is controlled by the power transmission mechanism (13). )
and is transmitted to the load sheep (5) via the reduction gear mechanism (8).
前記減速歯車機構(8)はギヤケース(80)を備え、
このケース(8)と前記第2サイドプレート(2)との
間には、前記した如く第1ギヤ(82)をもつ第1軸(
81)の他、第2.第3ギヤ(84)(85)をもった
第2軸(83)と、第4.第5ギヤ(87)(8B)を
もった第3軸(86)とが回転自由に支持され、前記第
5ギヤ(88)を前記ロードシープ軸(51)に固定の
第6ギヤ(89)に噛合わせて構成されている。The reduction gear mechanism (8) includes a gear case (80),
Between this case (8) and the second side plate (2), there is a first shaft (
81), as well as 2nd. a second shaft (83) with third gears (84) (85); A third shaft (86) having a fifth gear (87) (8B) is rotatably supported, and a sixth gear (89) is fixed to the load sheep shaft (51). It is constructed by interlocking with.
しかして、前記減速歯車機構(8)のり;j2第3軸(
86)には次の如き過負荷防止装置が配設されている。Therefore, the reduction gear mechanism (8); j2 third axis (
86) is equipped with the following overload prevention device.
即ち、第1図に示す如く、前記減速歯車機構(8)の前
記第3軸(86)の第5ギヤ(88)固定側とは反対側
に、スプライン部(86a)とねじ部(8E3 b)と
を形成して、前記スプライン部(88a)に前記第4ギ
ヤ(87)を遊嵌支持する支持部(21a)(22a)
と前記第4ギヤ(87)と摩擦接触する鍔部(21b)
(22b)とをもつ受止体(21)と伝動体(22)と
を軸方向に摺動可能で回転不能にスプライン嵌合し、か
つ、前記両鍔部(21b)(22b)で挟持する如く前
記第4ギヤ(87)を前記両支持部(21a)(22a
)に遊・嵌支持する一方、前記ねじ部(86b)に調整
ナラ) (23)を螺合すると共に、該ナツト(23)
と前記伝動体(22)との間に主として皿ばねから成る
弾性部材(24)を介装し、前記調整ナラ!−(23)
の締付は具合で、つまり、皿ばね(24)による前記伝
動体(22)への押圧力で前記伝動体(22)と第4ギ
ヤ(87)との摩擦抵抗値を設定すべく成している。こ
の場合、前記受止体(21)は第5ギヤ(88)の−側
面に当接して、該受止体(21)の第5ギヤ(88)側
への移動が阻止されている。That is, as shown in FIG. 1, a spline portion (86a) and a threaded portion (8E3 b ), and support parts (21a) (22a) that loosely fit and support the fourth gear (87) on the spline part (88a).
and a flange (21b) that makes frictional contact with the fourth gear (87).
(22b) and a transmission body (22) are spline-fitted to be slidable in the axial direction but not rotatable, and are sandwiched between the two flanges (21b) and (22b). As shown in FIG.
) while loosely fitting and supporting the nut (23), while screwing the adjusting nut (23) into the threaded portion (86b).
An elastic member (24) mainly made of a disc spring is interposed between the transmission body (22) and the adjustment nut! -(23)
In other words, the frictional resistance value between the transmission body (22) and the fourth gear (87) is set by the pressing force of the disc spring (24) on the transmission body (22). ing. In this case, the receiving body (21) comes into contact with the negative side surface of the fifth gear (88), thereby preventing the receiving body (21) from moving toward the fifth gear (88).
又、前記第4ギヤ(87)の両側面には、環状の凹入部
(87a) (87a)が形成され、これら凹入部(
87a) (87a)に摩擦板(25)(26)をそ
れぞれ装管し、これら各摩擦板(25)(28)を介し
て前記第4ギヤ(87)の−個と伝動体(22)とが、
また、第4ギヤ(87)の他側と受止体(21)とがそ
れぞれ摩擦接触すべく成している。Furthermore, annular recesses (87a) (87a) are formed on both side surfaces of the fourth gear (87), and these recesses (
87a) (87a) is equipped with friction plates (25) and (26), and the fourth gear (87) and the transmission body (22) are connected to each other via these friction plates (25) and (28), respectively. but,
Further, the other side of the fourth gear (87) and the receiving body (21) are configured to come into frictional contact with each other.
そして、前記伝動体(22)には、例えば複数の円錐形
状を呈する係合凹部(22c)を形成すると共に、該伝
動体(22)と対向するW−振板(25)と第4ギヤ(
87)とに複数の貫通孔(25a)及び(87b)を形
成して、これら各貫通孔(25a)(87b)内に前記
係合凹部(22c)に係合する主としてボールなどの係
合体(27)と該係合体(27)を前記係合四部(22
c)の方向に付勢するばね(28)とを設けて、前記係
合体(27)の係合凹部(22c)への保合により前記
伝動体(22)と第4ギヤ(87)とに保合抵抗を与え
るようにしている。The transmission body (22) is formed with, for example, a plurality of conical engagement recesses (22c), and a W-diaphragm (25) facing the transmission body (22) and a fourth gear (
A plurality of through holes (25a) and (87b) are formed in each of the through holes (25a) and (87b), and an engaging body (mainly a ball) that engages with the engaging recess (22c) is inserted into each of these through holes (25a) and (87b). 27) and the engaging body (27) are connected to the four engaging parts (22
A spring (28) biasing in the direction c) is provided so that the transmission body (22) and the fourth gear (87) are engaged by the engagement body (27) in the engagement recess (22c). It is designed to provide binding resistance.
しかして、前記皿ばね(24)の伝動体(22)への押
圧力による前記第4ギヤ(87)と伝動体(22)との
摩擦抵抗値と、前記ばね(28)をした係合体(27)
の係合凹部(22c)への係合による保合抵抗値とのト
ータルで、前記第4ギヤ(87)が伝動体(22)に対
しスリップするスリップ開始荷重を設定すべく成してい
る。Therefore, the frictional resistance value between the fourth gear (87) and the transmission body (22) due to the pressing force of the disc spring (24) on the transmission body (22), and the engagement body ( 27)
The slip starting load at which the fourth gear (87) slips relative to the transmission body (22) is set by the total of the retention resistance value due to engagement with the engagement recess (22c).
又、第1図及び第2図において、(29)は前記調整ナ
ツト(23)の弛みを阻止するのこ歯状係合部(29a
)をもつ阻止板であって、該阻止板(29)の基部を前
記伝動体(22)の外周部側面にポル) (30)(3
0)により芒脱可能とし、前記調整ナラ) (23)の
締付後、この阻止板(29)を前記伝動体(22)に取
付けて、前記調整ナラ) (23)の角部にのこ歯状係
合部(29a)に係止させ、前記調整ナラ) (23)
の弛みを阻止するようにしている。また前記阻止板(2
9)の中間部には立上り段部が形成され、該阻止板(2
9)と前記器ばね(24)との干渉をなくすようにし、
また、前記保合部(29a)は、前記調整ナツト(23
)の角部の少なくとも一つが必らず係止できるよう前記
調整ナツト(23)の直径をもとに描いた円弧線上に沿
って、は\90′の範囲に亘って形成されている。In FIGS. 1 and 2, (29) is a serrated engagement portion (29a) that prevents the adjustment nut (23) from loosening.
), the base of the blocking plate (29) being attached to the outer peripheral side of the transmission body (22) (30)
After tightening the adjusting nut (23), attach this blocking plate (29) to the transmission body (22) and insert a saw into the corner of the adjusting nut (23). (23)
I try to prevent the slack of the. In addition, the blocking plate (2
A rising step is formed in the middle of the blocking plate (2).
9) and the device spring (24),
Further, the retaining portion (29a) is connected to the adjusting nut (23).
) is formed over a range of \90' along an arc line drawn based on the diameter of the adjustment nut (23) so that at least one corner of the adjustment nut (23) can be locked.
本発明は以上の如く構成するもので、定格負荷の荷物を
捲上げるときには、前記第4ギヤ(87)を挟持スルI
!1eFfA板(25)(26) と伝動体(22)と
の摩擦抵抗値と前記係合体(27)の係合凹部(22c
)への保合による保合抵抗値とのトータルにより設定す
るスリップ開始荷重が負荷よりも大きいために、前記荷
物の捲上げが行なえる。The present invention is constructed as described above, and when hoisting a load with a rated load, the fourth gear (87) is
! The frictional resistance value between the 1eFfA plates (25) (26) and the transmission body (22) and the engagement recess (22c) of the engagement body (27)
) The load can be hoisted up because the slip start load set by the total of the locking resistance value due to locking to ) is larger than the load.
また、定格負荷以上の荷物を捲上げるときには、前記ス
リップ開始荷重よりも負荷が大きいため、前記係合体(
27)かばね(28)に抗して第4ギヤ(87)側に移
動しながら第3図に示す如く、伝動体(22)の係合凹
部(22c)から伝動体(22)の対向面に乗り上げる
ことになる。このように係合体(27)が伝動体(22
)の対向面に乗り上げると、該保合体(27)と伝動体
(22)とは点接触することになってこれら係合体(2
7)と伝動体(22)の係合凹部(22c)との保合抵
抗がなくなることになる。この結果、前記第4ギヤ(8
7)と伝動体(22)との間には、前記係合体(27)
の前記伝動体(22)における対向面への当接抵抗と、
皿ばね(24)による前記第4ギヤ(87)と伝動体(
22)との摩擦対抗とが作用することになって、前記係
合体(27)の前記対向面への乗り上げ時における前記
第4ギヤ(87)と伝動体(22)との伝達トルクが前
記スリップ開始荷重の設定時における伝達トルク、換言
すれば負荷トルクに較べて低下することになり、これに
より、前記係合体(27)が伝動体(22)の前記対向
面に乗り上げた時には、直ちに、かつ−挙に大きなスリ
ップが発生し、捲上げが行なえなくなるのである。In addition, when hoisting a load that exceeds the rated load, the load is greater than the slip start load, so the engaging body (
27) While moving toward the fourth gear (87) against the cover spring (28), as shown in FIG. It will run over. In this way, the engaging body (27) is connected to the transmission body (22).
), the holding body (27) and the transmission body (22) come into point contact and these engaging bodies (2
7) and the engagement recess (22c) of the transmission body (22) is eliminated. As a result, the fourth gear (8
7) and the transmission body (22), the engagement body (27)
contact resistance to the opposing surface of the transmission body (22);
The fourth gear (87) and the transmission body (
22), the torque transmitted between the fourth gear (87) and the transmission body (22) when the engaging body (27) rides on the opposing surface is reduced by the slip. The transmitted torque at the time of setting the starting load, in other words, will be lower than the load torque, and as a result, when the engaging body (27) rides on the opposing surface of the transmission body (22), the transmission torque will be reduced immediately and -Suddenly, a large slip occurs, making it impossible to hoist the paper.
尚、前記係合体(27)が対向面に乗り上げたとき、前
記ばね(28)の反発力が大きくなるため、前記器ばね
(24)ねの押圧力が小さくなり、このため、前記第4
ギヤ(87)と伝動体(22)との摩擦抵抗は減少する
のである。Note that when the engaging body (27) rides on the opposing surface, the repulsive force of the spring (28) increases, so the pressing force of the device spring (24) decreases, and therefore, the fourth
The frictional resistance between the gear (87) and the transmission body (22) is reduced.
又、前記係合体(27)の前記対向面への乗り上げ時に
おける伝達トルク減少値の設定は、前記器ばね(24)
による前記伝動ギヤ(87)と伝動体(22)との摩擦
抵抗値と、ばね(28)による前記係合体(27)の係
合凹m(22c)との保合抵抗値との割合を選択するこ
とにより行なえるのであって、前記係合抵抗値の前記摩
捺対抗値に対する割合を大きくするほど前記伝達トルク
を減少することができる。この場合、前記係合体(27
)の前記対向面への乗り上げに伴なう前記ばね(28)
の反発力が前記器ばね(24)の抑圧力よりも大きくな
るように設定して前記係合体(27)の前記対向面への
乗り上げ時における前記第4ギヤ(87)と伝動体(2
2)とのWI!捺抵抗抵抗値となるようにしてもよい。Further, the transmission torque reduction value when the engaging body (27) rides on the opposing surface is set by the device spring (24).
Select the ratio between the frictional resistance value between the transmission gear (87) and the transmission body (22) due to The transmission torque can be reduced as the ratio of the engagement resistance value to the abrasion resistance value increases. In this case, the engaging body (27
) as the spring (28) rides on the opposing surface.
The repulsive force of the gear spring (24) is set to be larger than the suppressing force of the gear spring (24), so that the fourth gear (87) and the transmission body (2
2) WI with! It may be made to be the printing resistance resistance value.
以上の実施例では、過負荷調整ナツト(23)をギヤケ
ース(80)に内蔵する構成としたけれども、この他、
ギヤケース(80)の外部に前記調整ナラ) (23)
を配置して、ギヤケース(80)を取外すことなく摩擦
抵抗のyA整が簡素容易に行なえるようにしてもよい。In the above embodiment, the overload adjustment nut (23) is built into the gear case (80), but in addition to this,
The adjustment screw (23) is attached to the outside of the gear case (80).
may be arranged so that the yA adjustment of the frictional resistance can be performed simply and easily without removing the gear case (80).
この場合、例えば第5図に示す如く前記第3軸(86)
のスプライン部(86a)外側に、先端にねじ部(88
b)をもつ小径m(86c)を形成して、該小径部(8
8c)に皿ばね(24)の押え体(31)を挿嵌支持す
ると共に、核部え体(31)の外周を軸受(32)を介
してギヤケース(80)に支持させる一方、前記押え体
(31)の外方端部を前記軸受(32)、つまりギヤケ
ース(80)よりも外方に延出し、かつ、前記小径部(
86c)の先端ねじ部(8E3 b)に過負荷調整ナラ
) (23)を螺合することにより、前記ギヤケース(
80)外部からの前記調整ナラ) (23)の締付は調
整により前記押え体(31)、皿ばね(24)を介して
伝動体(29)を第4ギヤ(87)側へ押付け、前記伝
動体(22)と第4ギヤ(87)との摩擦抵抗値を設定
できるのである。In this case, for example, as shown in FIG.
On the outside of the spline part (86a), there is a threaded part (88
forming a small diameter m (86c) having a diameter m (86c);
8c), the presser body (31) of the disc spring (24) is inserted and supported, and the outer periphery of the core portion supporter (31) is supported by the gear case (80) via a bearing (32), while the presser body (31) extends outward beyond the bearing (32), that is, the gear case (80), and the small diameter portion (
By screwing the overload adjustment nut (23) onto the threaded end (8E3 b) of the gear case (86c),
80) Adjustment knob (23) from the outside is tightened by pressing the transmission body (29) toward the fourth gear (87) via the presser body (31) and disc spring (24). The frictional resistance value between the transmission body (22) and the fourth gear (87) can be set.
尚、以上の実施例では、第4ギヤ(87)側に係合体(
27)及びばね(28)を内装し、伝動体(22)に係
合凹部(22c)を形成したけれども、第4ギヤ(87
)側に係合凹部(22C)を形成し、伝動体(22)に
係合体(27)及びばね(28)を内装するようにして
もよいし、又、前記受止体(21)は実質的に伝動体を
構成するものであるから、該受止体(伝動体)(21)
と第4ギヤ(87)との間に前記係合体(27)と係合
凹部(22c)とから成る係合抵抗手段を設けてもよい
。さらに、前記過負荷防止装置の取付位置についても何
ら第3軸(86)の第4ギヤ(87)に限定されるもの
でなく、他の伝動軸の伝動ギヤに取付けてもよいことは
勿論である。In addition, in the above embodiment, the engaging body (
27) and a spring (28), and an engagement recess (22c) is formed in the transmission body (22).
) side may be formed with an engaging recess (22C), and the engaging body (27) and spring (28) may be housed inside the transmission body (22), and the receiving body (21) may be substantially Since it constitutes a transmission body, the receiving body (transmission body) (21)
An engagement resistance means consisting of the engagement body (27) and the engagement recess (22c) may be provided between the fourth gear (87) and the fourth gear (87). Further, the mounting position of the overload prevention device is not limited to the fourth gear (87) of the third shaft (86), and it goes without saying that it may be mounted to the transmission gear of another transmission shaft. be.
(発明の効果)
以上の如く本発明は、伝動ギヤ(87)に伝動体(22
)を弾性部材により押圧して前記伝動ギヤ(87)と伝
動体(22)とに摩擦抵抗を与えるようにした過負荷防
止v2置において、前記伝動ギヤ(87)と伝動体(2
2)との対向面の一方に係合凹部(22c)を設け、他
方に、前記係合凹部(22c)に係合する係合体(27
)と該保合体(27)を前記係合凹部(22c)の方向
に付勢するばね(28)とを設け、前記伝動ギヤ(87
)が伝動体(22)に対しスリップするスリップ開始荷
重を、前記伝動ギヤ(87)と伝動体(22)との摩擦
抵抗値と、前記係合体(27)の係合凹部(22c)と
の保合抵抗値とのトータルで設定する如くしたものであ
るから、荷物の持上時、つまり荷物の地切り動作時に、
前記摩擦抵抗値と保合抵抗値とのトータルで設定したス
リップ荷重に対し僅かでも大きな負荷がか\ると、前記
係合体(27)かばね(28)に抗し伝動ギヤ(87)
又は伝動体(22)の係合凹部(22c)から外れて、
前記伝動ギヤ(87)又は伝動体(22)の対向面に乗
り上げる如く移動し、この移動により1′r1記係合体
(27)の係合口部(22c)との係合抵抗がなくなり
、つまり、前記係合体(27)の前記対向面への当接抵
抗と、該係合体(27)の前記対向面への乗り上げに伴
って絨少する前記伝動ギヤ(87)と伝動体(22)と
による摩擦抵抗とが作用することになり、このため、こ
れら当接抵抗とrgl擦抵抗抵抗トータルによるスリッ
プ阻止荷重が前記スリップ開始荷重に較べて低下するこ
とになり、この結果、前記スリップ開始荷重と負荷との
差が僅かであっても直ちに、かつ−挙に大きなスリップ
が発生して捲上げが行なえなくなり、これにより、従来
のように過負荷の状態であるにも拘わらず、捲上げが行
なわれ、宙吊り状態から荷物が落下する。(Effects of the Invention) As described above, the present invention provides the transmission gear (87) with the transmission body (22).
) is pressed by an elastic member to provide frictional resistance between the transmission gear (87) and the transmission body (22).
2), an engaging recess (22c) is provided on one side, and an engaging body (27) that engages with the engaging recess (22c) is provided on the other side.
) and a spring (28) that urges the holding body (27) in the direction of the engagement recess (22c), and the transmission gear (87
) slips against the transmission body (22), the slip start load is determined by the frictional resistance value between the transmission gear (87) and the transmission body (22), and the engagement recess (22c) of the engagement body (27). Since it is set in total with the retention resistance value, when lifting the load, that is, when lifting the load,
If a load that is even slightly larger than the slip load set by the total of the frictional resistance value and the locking resistance value is applied, the transmission gear (87) will resist the engaging body (27) and the spring (28).
or comes off from the engagement recess (22c) of the transmission body (22),
It moves as if riding on the opposing surface of the transmission gear (87) or the transmission body (22), and this movement eliminates the engagement resistance with the engagement opening portion (22c) of the engagement body (27) 1'r1, that is, This is due to the contact resistance of the engaging body (27) to the opposing surface, and the transmission gear (87) and the transmitting body (22) becoming thinner as the engaging body (27) rides on the opposing surface. Therefore, the slip prevention load due to the total contact resistance and rgl friction resistance will be lower than the slip start load, and as a result, the slip start load and load will be reduced. Even if there is a small difference between the , a load falls from a suspended position.
といったことを確実になくし得るのである。This can definitely be eliminated.
第1図は本発明に係る過負荷防止装置の実施例を示す要
部の縦断面図、第2図は調整ナツトの弛み阻止板の正面
図、第3図は係合体の伝動体の対向面への乗り上げ状態
を示す説明図、第4図は本発明過負荷防止装置を適用し
た電動チェンブロノクの縦断面図、第5図は過負荷防止
装置の他の実施例を示す要部の断面図である。
(5)・・・・・・ロードシープ
(22)・・・・・・伝動体
(22c)・・・・・・係合凹部
(24)・・・・・・皿ばね(弾性部材)(27)・・
・・・・係合体
(60)・・・・・・駆動軸
(86)・・・・・・伝動軸
(87)・・・・・・伝動ギヤFig. 1 is a vertical cross-sectional view of the main parts showing an embodiment of the overload prevention device according to the present invention, Fig. 2 is a front view of the loosening prevention plate of the adjustment nut, and Fig. 3 is the opposing surface of the transmission body of the engaging body. FIG. 4 is a longitudinal sectional view of an electric chain blower to which the overload prevention device of the present invention is applied, and FIG. 5 is a sectional view of the main parts showing another embodiment of the overload prevention device. be. (5) Load sheep (22) Transmission body (22c) Engagement recess (24) Disc spring (elastic member) ( 27)...
...Engagement body (60) ...Drive shaft (86) ...Transmission shaft (87) ...Transmission gear
Claims (1)
伝動軸(86)に遊嵌される伝動ギヤ(87)と前記伝
動軸(86)に軸方向のみ摺動可能に支持され、前記伝
動ギヤ(87)と摩擦接触する伝動体(22)とこの伝
動体(22)を前記伝動ギヤ(87)に押圧する弾性部
材(24)とを備えた過負荷防止装置において、前記伝
動ギヤ(87)と伝動体(22)との対向面の一方に係
合凹部(22_c)を設け、他方に、前記係合凹部(2
2_c)に係合する係合体(27)と該係合体(27)
を前記係合凹部(22_c)の方向に付勢するばね(2
8)とを設け、前記伝動ギヤ(87)が伝動体(22)
に対しスリップするスリップ開始荷重を、前記伝動ギヤ
(87)と伝動体(22)との摩擦抵抗値と、前記係合
体(27)の係合凹部(22_c)との係合抵抗値との
トータルで設定する如くしたことを特徴とする捲上機の
過負荷防止装置。[Scope of Claims] A transmission gear (87) loosely fitted to a transmission shaft (86) in a hoisting machine that transmits rotational power of a drive shaft (60) to a load sheep (5). and a transmission body (22) that is slidably supported on the transmission shaft (86) only in the axial direction and makes frictional contact with the transmission gear (87), and presses the transmission body (22) against the transmission gear (87). In the overload prevention device including an elastic member (24), an engagement recess (22_c) is provided on one side of opposing surfaces of the transmission gear (87) and the transmission body (22), and the engagement recess (22_c) is provided on the other side. (2
2_c) and the engaging body (27) that engages with
a spring (2_c) that urges the
8), and the transmission gear (87) is the transmission body (22).
The slip starting load at which the transmission gear (87) and the transmission body (22) slip is calculated as the total of the frictional resistance value between the transmission gear (87) and the transmission body (22), and the engagement resistance value between the engagement body (27) and the engagement recess (22_c). An overload prevention device for a hoisting machine, characterized in that it is set as follows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28952486A JPH0712912B2 (en) | 1986-12-04 | 1986-12-04 | Overload prevention device for hoisting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28952486A JPH0712912B2 (en) | 1986-12-04 | 1986-12-04 | Overload prevention device for hoisting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63143199A true JPS63143199A (en) | 1988-06-15 |
| JPH0712912B2 JPH0712912B2 (en) | 1995-02-15 |
Family
ID=17744368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28952486A Expired - Fee Related JPH0712912B2 (en) | 1986-12-04 | 1986-12-04 | Overload prevention device for hoisting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0712912B2 (en) |
-
1986
- 1986-12-04 JP JP28952486A patent/JPH0712912B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0712912B2 (en) | 1995-02-15 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |