CN2081835U - Automatic unhooking apparatus for wire rope - Google Patents

Abstract

The utility model belongs to the technical field of hanging devices of crane, which is composed of a lever, a drive rod, an explorator curved groove, a movable block, a reset torsion spring, etc. When the crane lifts cargoes, the head part of the lever closes with the movable block to form a movable hook and prevents the pulling out of a wire cable; when the lifted cargoes fall on a specified position and the wire cable loosens, the reset torsion spring makes the head part of the lever generate displacement; when the crane uplifts again, the head part of the lever is separated with the movable block, the wire cable automatically unhooks, and the reset torsion spring enables the head part of the lever to reset, thereby, the automatic unhooking of the wire cable and the automatic resetting of the movable hook are achieved.

Description

Automatic unhooking apparatus for wire rope

The utility model belongs to hoisting crane erecting by overhang technical field.

Be generally used for the suspension hook of handling goods, the steel rope that needs manually yarn to be lived goods before lifting hangs on the suspension hook.The goods handling unload fall behind, again by manually winning steel rope from suspension hook.Operating personal operation under load hook, labor condition is poor, and labour intensity is big, and dangerous, inefficiency.When particularly lifting round log, steel, weight such as packed, very easily cause casualty accident.

At the shortcoming of above-mentioned suspension hook,, report is arranged all both at home and abroad to the research of automatic decoupling device.As the disclosed patent No. of China Patent Office is " automatic hanging hook " utilization inclined-plane mechanics principle of CN87213206, realizes suspension hook and swivel hook auto lock by gravity when lifting.After the unloading, the upset realization is automatically-unhooked automatically under the deadweight effect for suspension hook.Because this device does not have the automatic control reset attachment, the readiness before lifting need manually be engaged in and buttress suspension hook, depresses dead-man's handle, swivel hook is rotated counterclockwise fasten the suspension hook shank, in time will hang pin and insert loaded down with trivial details manual reset work such as side plate; And for example CN8821700.9 disclosed " band takes off the suspender of rope formula suspension hook automatically " not only needs manual reset before lifting, and this kind suspender needs to use in pairs; CN8920226.2 disclosed " suspension hook that can be automatically-unhooked " needs manual reset equally before lifting for another example.All there are the weak points such as manual reset operation before the lifting in above-mentioned automatic decoupling device, gives and uses operation to make troubles, and makes to apply and is limited to.

The utility model provides a kind of steel rope automatic decoupling device that has improved, and has automatically-unhooked, auto lock and automatically reset function.Thereby easy and simple to handle, the purpose that reach the assurance safety in production, reduces labour intensity and increase productivity.

Structural principle of the present utility model is shown in accompanying drawing 1,2.By hole for hoist (1), fixedly suspension hook (2), base plate (15), cover plate (16) and lever (3), bolster (4) pivot pin (7), reduction torsion spring (10), drive link (11), rest pin (12), pattern (13), active block stop (17), pivot pin (18), extension spring (19), pattern crank slot (22) and trimming screw (23) etc. are formed movable hook and transmission device.

Movable hook is made up of with the head of lever (3) the active block stop (17) that is loaded on by pivot pin (18) and bolster (4) correspondence between base plate (15) and the cover plate (16).Control lever (3) head realize I '-II '-III '-transmission device that IV ' standard stops moving, by the head of lever (3) is that the center of circle is passed through bolster (4) and is loaded between base plate (15) and the cover plate (16) with the fulcrum, the other end of lever (3) is hinged by pivot pin (7) and drive link (11), the not end of drive link is equipped with rest pin (12), rest pin (12) places in the pattern crank slot (22) of the pattern that non-return reed (14) are housed (13) that links with base plate (15), forms together with the reduction torsion spring (10) that is loaded on the base plate (15).

Lever (3) head, top be curved surface, head stretches in the notch of active block stop (17), stage casing curved surface and the reduction torsion spring (10) that is loaded on the base plate (15) are adjacent to.Under the effect of gravity or reduction torsion spring (10), the head of lever (3) can around bolster (4) do I '-close in advance (resetting), II '-close (locking), III ' open in advance, IV '-the accurate off-position of Kai puts motion.Active block stop (17) passes through the head of pivot pin (18) corresponding to lever (3) with eccentric orfice, be contained between base plate (15) and the cover plate (16), be shaped on the notch that holds lever (3) head on it, the back is for facing directly, there are lug boss and the extension spring (19) that is contained on the base plate (15) to link above, face the below directly and be close to the head that is loaded on the trimming screw (23) of base plate (15) side.Active block stop (17) can be convenient to dress and hang steel rope around pivot pin (18) anticlockwise motion.The relative position of trimming screw (23) adjustable block (17) and lever (3) head is to adapt to the steel rope of different size.

Pattern (13) links with base plate (15) or makes one, according to the action request of lever (3) head, makes the shape of falling peach pattern crank slot (22), and the non-return reed (14) that prevents rest pin (12) inverse motion is equipped with in the bottom.Under the effect of gravity or reduction torsion spring (10), lever (3) drives drive link (11) makes rest pin (12) do the slip that the accurate off-position of I-II-III-IV is put order in pattern crank slot (22).Can not reverse.With the head that drives lever (3) do along the center of bolster (4) I '-II '-III '-motion that IV ' accurate off-position is put, thereby realize four kinds of mode of operations that close (resetting) in advance, close (locking), open in advance, open of movable hook.

Fig. 1 is the front view of steel rope automatic decoupling device when throwing off cover plate.

Fig. 2 is the cutaway view of steel rope automatic decoupling device along the A-A tangent plane.

The contrast accompanying drawing is described further the principle of work of this steel rope automatic decoupling device in conjunction with embodiment of the present utility model below.Rated load weight is 5t among the embodiment, and wirerope diameter is 10-20mm.

During crane lifting service, U type ring (or directly) is hung on the crane hook by hole for hoist (1), and steel rope one end hangs over fixedly on the suspension hook (2), and the other end backs down the head that active block stop (17) hangs over lever (3), active block stop resets and blocks steel rope, prevents that steel rope from deviating from.At this moment rest pin (12) is in the position of pattern crank slot I, and the head of lever (3) is in I ' position.When slinging weight, gravity makes lever (3) drive drive link (11) promotion lever (3) make its head correspondingly move to II ' position, and active block stop (17) still blocks steel rope (being self-locking).When hoisting crane with the goods handling behind assigned address, steel rope loosens, reduction torsion spring (10) makes rest pin (12) slide into the position of pattern crank slot (22) III by lever (3), drive link (11), the head of lever (3) correspondingly move to III ' the position, relend the action of gravity that helps crane lifting and lever (3) head to bear, make rest pin (12) slide to the position of pattern crank slot (22) IV.This moment lever (3) head anticlockwise motion and separating gradually with active block stop (17), when rest pin slided into the position of IV, steel rope was deviate from from lever head.Meanwhile owing to the effect of reduction torsion spring (10), two rest pins (12) that make are returned to the position of I, and the head of lever (3) goes to I ' position (resetting), can proceed operation next time like this.

In sum, the utlity model has and do not come off after steel rope hangs up; After finishing the lifting process and unloading goods, do not need the external force can be automatically-unhooked, and can automatically reset; After the lifting cargo operating personal need only hang up steel rope, can withdraw from the dangerous area, lift by crane and unload goods then, therefore realize safety in production, improve working conditions, reduce the labour intensity and the purpose of enhancing productivity.Thereby, be specially adapted to places such as station, harbour, warehouse, mine and forest farm and make the steel rope automatically-unhooked hanger.

Claims (4)

1, a kind of steel rope automatic decoupling device is made up of fixedly suspension hook (2), base plate (15), cover plate (16) and movable hook and transmission device etc., it is characterized in that movable hook is made up of with the head of lever (3) the active block stop (17) that is loaded on by pivot pin (18) and bolster (4) correspondence between base plate (15) and the cover plate (16); Transmission device by lever (3) and lever (3) tail end with pivot pin (7) pivotally attached drive link (11), be loaded on rest pin (12) on the drive link (11), hold the pattern crank slot (22) on the pattern (13) that rest pin rotates and the reduction torsion spring (10) that is loaded on the base plate (15) is formed.

2, steel rope automatic decoupling device according to claim 1, it is characterized in that lever (3) is that the center of circle is passed through bolster (4) and is loaded between base plate (15) and the cover plate (16) with the fulcrum, lever (3) head, top one-tenth curved surface shape, its head stretches in the notch of active block stop (17), and the stage casing curved surface of lever (3) is close to the reduction torsion spring (10) on the base plate (15) of packing into.

3, steel rope automatic decoupling device according to claim 1, it is characterized in that active block stop (17) has eccentric orfice to pass through pivot pin (18) and is loaded between base plate (15) and the cover plate (16), and have notch and can hold lever (3) head and stretch into, the back is for facing directly, the top has lug boss and the extension spring (19) that is loaded on the base plate (15) to link, and the below is close to the head that is loaded on the trimming screw (23) of base plate (15) side.

4, steel rope automatic decoupling device according to claim 1, it is characterized in that pattern (13) and base plate (15) link or make one and be shaped on and hold rest pin (12) and make the shape of falling the peach pattern crank slot (22) that I-II-III-IV is slided in proper order, bottom land is equipped with non-return reed (14).

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