CN1029465C

CN1029465C - Double crossed frame type man-carrying elevator

Info

Publication number: CN1029465C
Application number: CN 86100436
Authority: CN
Inventors: 仲建元
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-01-26
Filing date: 1986-01-26
Publication date: 1995-08-09
Anticipated expiration: 2001-01-26
Also published as: CN86100436A

Abstract

The present invention discloses a double crossed frame type man-carrying elevator for building construction, and a hanging type safety device and a mechanical speed limiting hoister contained in the double crossed frame type man-carrying elevator. The double crossed frame type man-carrying elevator uses a double crossed frame type elevator which is assembled by short rod members and is generally adopted in the Yangtze delta as a prototype, and the double crossed frame type elevator is improved. The hanging type safety device which can softly brake a hanging box when the hanging box falls due to the fracture of a lifting rope or when the falling speed of the hanging box is too high is used for substituting for the original safety device with two transverse rods which outwards extend from a hanging cage and are placed on an abdomen rod of a tower body when the lifting rope is fractured. The mechanical speed limiting hoister which can softly brake a rope cylinder when the rotary speed of the rope cylinder for discharging a steel rope is too high is used for substituting for the common hoister.

Description

Double crossed frame type man-carrying elevator

The present invention relates to the falling proof device of a kind of gig, elevator.

The elevator fall arrest generally adopts the mechanical device that drives safe clamp track with velocity limiter now, reliability has obtained admitting, but there is certain limitation the use aspect, be not easy on the working stand of external application construction elevator and little tonnage, use, other has some falling proof devices, as launch rod-type, hook-type etc., their reliability is still not enough.

The object of the present invention is to provide a kind of practicality good, the high falling proof device of reliability, the cage that can when hoisting rope is disrumpent feelings, hover at once, when the cage descending speed surpassed specified value, cage hovered.

Invention is finished by following method.

Be raised the steel rope one standby steel cable that is connected with sufficient intensity on the thing (hanging dragon), make the pouring weight of hanging certain mass behind its race of walking around one group of pulley, when cage was raised, this pouring weight service direction was opposite with the cage direction, steel strip by around pulley rotate.On the wheel rim of described pulley, do ratchet (or ratchet and pulley fuse), be equipped with required braking ratchet for every ratchet.After ratchet and ratchet engagement braking, cage then must overcome the friction force of standby steel rope in pulley groove if will descend.From Euler's formula: F=F ₁* e ^AfAs can be known, when the ratio of the quality of cage and pouring weight less than formula in " e ^AfDuring part, cage is just hovered by standby steel cable and can not descend and (fallen).The generation of described ratchet and ratchet engagement is the control that is being subjected to two kinds of mechanisms: a kind of is the gravity reaction mechanism, when the winch bird cage, tension force on the hoisting rope makes gravity reaction spring energy-storage, when the generation hoisting rope was disrumpent feelings, spring returned original position, makes ratchet and ratchet engagement by drive link; Another kind is to use centrifugal speed limiter, make the rotating speed of velocity limiter corresponding with the rotating speed of pulley consistent with gear transmission, when cage descending speed overshoot value, velocity limiter reaches responsiveness, promptly move,, make ratchet and ratchet engagement by drive link, after pulley is braked, the standby steel cable cage that promptly hovers.

The present invention is the robust techniques combination of several liftings, as the click braking, and the Euler's formula principle, simple in structure, can realize in a variety of forms.

Below in conjunction with accompanying drawing invention is further described:

Accompanying drawing 1 has been described a kind of anti-fall device of the cage that hovers when hoisting cable is disrumpent feelings.There is the pulley 1 of ratchet to be contained in the tool casing on three wheel rims, be furnished with ratchet 2 and click spring 3, the transmission device of forming with lever 8,11 and connecting rod 10 and pin is not held with pawl bar 12 and is contacted, the afterbody of lever 8 hangs in the extension spring 9, the pulling force of extension spring makes transmission device not hold cw deflection, allows sour jujube spring 3 push away ratchet 2 and ratchet engagement.

Standby steel rope 5 on the cage 4 is walked around hanging pouring weight 6 behind the race of three pulleys 1, and one of the hoisting cable 7 of winch is connected on the lever 8.When the winch bird cage, cage gravity tie-bar bar right-hand member forwards bottom dead point to, and extension spring 9 is simultaneously stretched, and the not end ramp effect pawl bar 12 of transmission device makes ratchet break away from ratchet, and pulley 1 is being with by standby steel rope 5 freely to rotate.When hoisting rope is disconnected, lose the effect of cage gravity on the lever 8, extension spring 9 draws the one head upwards, not end inclined-plane and the pawl bar of transmission device disengage, ratchet under sour jujube spring 3 acts on, with ratchet engagement, the friction force of standby steel rope in the pulley groove cage that hovers.

Hover when having described the super specified value of cage descending speed a kind of anti-fall device (not marking hoisting rope) of cage of accompanying drawing 2.Casing one side is adorned a tool centrifugal speed limiter 13, and gear 14 and the gear on the pulley 1 15 on its spindle nose mesh, and have constituted the speed (cage rising or falling speed) of standby steel cable during operation, and the pulley rotating speed is corresponding with the rotating speed of centrifugal speed limiter consistent.When the cage descending speed overflows, the centnifugal force of the interior ratchet of velocity limiter is greater than the entad pulling force of spring, ratchet 16 and interior ratchet engagement in making, rotate with the cam 17 of interior ratchet one,, make one of lever 19 upwards to lift through steamboat 18 transmissions, drive link 10 arm-ties 11 clockwise rotate, plate 11 does not hold inclined-plane and pawl bar 12 to break away from, and click spring 3 pushes away ratchet 2 and ratchet engagement, the friction force of standby steel rope in the race that the is braked cage that hovers.

Accompanying drawing 3 has been described the gear on the pulley and the situation of the gear mesh on the velocity limiter spindle nose, gear 15 on pulley 1, the two coaxial line, gear 14 on the velocity limiter spindle nose and 15 engagements have constituted the pulley rotating speed, the fixed proportion relation of velocity limiter axle rotating speed and rope speed.

Above-mentioned accompanying drawing 1 and accompanying drawing 2 described two kinds of falling proof devices can the described casing of a shared tool and described one group of pulleys 1.Described in the accompanying drawing 1 when hoisting rope is disrumpent feelings, the gravity response control mechanism that the generation of described ratchet and ratchet is braked is contained in a side of casing, the centrifugal speed limiter of braking takes place in make when the cage hypervelocity descends described ratchet and ratchet described in the accompanying drawing 2, and the Control for Speed Limitation mechanism that lever 19, spring, drive link are formed is contained in the opposite side of same tool casing.

Claims

1, a kind of standby steel rope floating type falling proof device, it prevents that by standby steel rope is set cage from falling on cage, it is characterized in that: it is by the pulley (1) that has ratchet on three wheel rims that are arranged in the casing, ratchet (2), sour jujube spring (3), lever (8), drive link (10) and energy storage spring (9) are formed, described ratchet, the sour jujube spring is contained in the wheel rim outside of every pulley (1), one end of lever (8) is by drive link (10), plate (11) contacts with three ratchets respectively, the other end links to each other with hoisting rope (7) with energy storage spring (9), gravity pull lever (8) when cage is promoted, by drive link (10), plate (11) makes ratchet (2) separate with ratchet, make energy storage spring distortion energy storage simultaneously, when hoisting rope is disrumpent feelings, lever loses cage gravity on (8), energy storage spring (9) makes lever return original position, sour jujube spring (3) is pressed ratchet and ratchet engagement, brake sheave.

2,, it is characterized in that the control drive mechanism of brake sheave when hoisting cable is disrumpent feelings that described drive link (10), plate (11), lever (8) and energy storage spring (9) are formed is a side that is contained in described casing according to the described standby steel rope floating type falling proof device of claim 1.

3, a kind of standby steel rope floating type falling proof device, it prevents that by standby steel rope is set cage from falling on cage, it is characterized in that: it is by the pulley (1) that has ratchet on three wheel rims that are arranged in the casing, ratchet (2), sour jujube spring (3), lever (19), drive link (10) and centrifugal speed limiter are formed, described ratchet (2) is contained in the outside of every pulley (1) wheel rim, one end of lever (19) is by drive link (10), plate (11) contacts with ratchet (2) respectively, the other end of spring tie-bar bar (19) makes ratchet separate with ratchet, gear (15) engagement on gear (14) on described centrifugal speed limit (13) axle and the described pulley (1), when descending speed overflows, after the interior ratchet (16) of centrifugal speed limiter (13) and the interior ratchet engagement, promote lever (19) and drive link (10), plate (11) is retracted original position, sour jujube spring (3) is pressed ratchet (2) and ratchet engagement, brake sheave.

4,, it is characterized in that the Control for Speed Limitation transmission device of brake sheave when the cage hypervelocity descends that described lever (19), spring, drive link (10), plate (11) and centrifugal speed limiter form is the opposite side that is contained in described casing according to the described standby steel rope floating type anti-drop device of claim 3.