CN2231679Y - Alarm force fetching mechanism for use in case of excessive load of elevator - Google Patents

Abstract

The utility model relates to an alarm force fetching mechanism for use in case of excessive load of an elevator, which is composed of two groups clamping plates 3 and a force sensor 5, two groups of parallel wire cables 1, 2 used for hanging the box body of the elevator are fixed on two ends by the clamping plates 3, the vertical length between the two ends is 21; the force sensor 5 is connected with two wire cables at the middle point A of the vertical length, the distance of the two wire cables at the point A is adjusted, so that each wire cable has an angle theta with the plumb position, and the force sensor can take out a component force of the load of the elevator; when the component force is bigger than a set vale, the force sensor 5 can send out the excessive load signal.

Description

Elevator overload warning take-off

The utility model is a kind of take-off that belongs to elevator overload warning signal.

The elevator overload warning is the important device that ensures elevator safety operation, the overload warning of at present general elevator all adopts direct power taking mode, promptly between the double walled floor of elevator box, support with spring assembly and micro-switch, during the elevator overload, the upper strata base plate is compressed to the position of touching micro-switch with spring assembly, thereby makes annunciator send alerting signal.This power taking mode simple, intuitive, but false alarm occurs being easy to generate when unbalanced when casing stand under load point, particularly to the transformation of alarm free device elevator in using, gigantic project, the expense costliness, holding time is many, is difficult for implementing.

The purpose of this utility model is that the transformation for alarm free device elevator provides simply, quick, failure-free novel overloading warning take-off.

The technical solution of the utility model: elevator overload warning signal take-off is made up of two groups of clamping plate and a force gauge, distance between every group of clamping plate is regulated with attachment bolt thereon, remains unchanged so that hang the original distance of steel rope of elevator box; Force gauge is contained on two steel ropes that are positioned at upper and lower two groups of clamping plate stage casings, and makes steel rope produce a micro displacement in the horizontal direction, obtains the sharing part of the load on the steel rope with this.Its principle is: from hanging a stressed component of the shaft-like or tabular sensor steel rope of steel rope 1,2 usefulness of elevator box.The way that component can be used in the original distance that changes two parallel steel wire ropes in certain a bit of scope produces.

The utility model has the advantages that: can not change the elevator original structure or increase under the situation of great engineerings such as box bottom, realize the overload warning purpose.

Below to description of drawings:

The structural representation of Fig. 1-take-off;

The power analysis chart of Fig. 2-take-off;

Below in conjunction with accompanying drawing the utility model embodiment is described.

At C, B place, to suspend two groups of parallel steel wire ropes, 1,2 clampings of elevator box respectively in midair with two groups of clamping plate 3, regulate the bolt 4 that connects clamping plate, can make two groups of steel ropes keep original distance constant, at the A place of C, B mid point, be a length dimension that the two ends of the shaft-like force gauge 5 of b are installed in respectively on two groups of steel ropes, when b＞a (pressurized) or b＜a (tension), steel rope on the A point departs from the θ angle in its upright position, and tg θ=[(b-a)/2]/1 is arranged this moment.Because the deadweight of casing and load capacity W acts on steel rope and steel rope departs from the coefficient result of upright position will be accepted two horizontal component of force F that steel rope applies at the two ends of force gauge 5 _A=(W/2) tg θ (see figure 2), at this moment, force gauge 5 just provides total force F=2F _AValue, if this value surpasses predefined alarming value, then annunciator will send alerting signal.

Because force gauge has higher sensing sensitivity and quite wide amount limit, thereby does not require F _ABigger value is arranged, promptly the θ angle can regulate try one's best little, come mechanical injuries with the exempt from customs examination rope belt.For example for the elevator of 1 ton of carrying capacity, when getting $\mathrm{tg\θ}=\frac{1}{10}$ The time, F=100kg F _A=50kg $\mathrm{tg\θ}=\frac{1}{20}$ The time, F=50kg F _A=25kg $\mathrm{tg\θ}=\frac{1}{40}$ The time, F=25kg F _A=12.5kg $\mathrm{tg\θ}=\frac{1}{80}$ The time, F=12.5kg F _A=6.25kg

Embodiment of the present utility model is not limited to above-mentioned shaft-like sensor, on the steel rope at Figure 1A place, attach a tabular force gauge (not drawing among former Fig. 1), locating to support with a length dimension b between two groups of parallel steel wire ropes at this is adjustable supporting member, replace the force gauge among former Fig. 1, so that C, extrapolated (b＞a) or the inwards draw in (b＜of two groups of steel ropes between B a) to the angle theta desired position, at this moment under the effect of box weight, tabular force gauge just produces cooresponding pressure or tension force, when this power value is equal to or greater than the setting alarming value, promptly send the overload warning signal.

Claims (3)

1. elevator overload warning signal take-off, comprise two groups of clamping plate 3 and a force gauge 5, it is characterized in that: the distance between every group of clamping plate is regulated with attachment bolt 4 thereon, so that make the original distance of steel rope (1,2) that hangs elevator box be maintained fixed constant; Force gauge 5 is contained on two steel ropes that are positioned at stage casing between upper and lower two groups of clamping plate, and makes steel rope produce a micro displacement in the horizontal direction, obtains the component of load on the steel rope with this.

2. elevator overload warning signal take-off according to claim 1, it is characterized in that: described force gauge 5 is shaft-like force gauge, its two ends are clamped between two steel ropes in upper and lower two groups of clamping plate stage casings, its natural length of mat, make steel rope produce in the horizontal direction one small relatively or displacement in opposite directions, obtain the component of load on the steel rope by shaft-like force gauge 5.

3. elevator overload warning signal take-off according to claim 1, it is characterized in that: this force gauge 5 is tabular sensor, tabular sensor is attached on the steel rope between upper and lower two groups of clamping plate, and between two groups of steel ropes 1,2 of position A, supported with the adjustable support part, make b＞a or b＜a, can obtain the component of load on the steel rope.

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