CN2343275Y

CN2343275Y - Wedge pliers braking type fall-prevention safety lock

Info

Publication number: CN2343275Y
Application number: CN 98227750
Authority: CN
Inventors: 李明
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-03
Filing date: 1998-09-03
Publication date: 1999-10-13
Anticipated expiration: 2008-09-03

Abstract

The utility model provides a wedge pliers braking type drop prevention safety lock which has the advantages of simple structure and easy use, and the braking to drop objects is quick and effective. The utility model is composed of a hanging beam, a spring, a spring seat, a pair of wedge pliers, a tilted block, a thrust ring, a lever, a pin shaft and a safety lever. The utility model is characterized in that the wedge pliers 2 are arranged on a tilted plate 1; the elasticity of the spring 3 can downwards push the wedge pliers 2 by the spring seat 5; the end part of the lever 12 can upwards push the wedge pliers 2 by the thrust ring 11; the safety lever 10 passes through a pliers mouth of the wedge pliers 2; both ends of the safety lever are connected with a large member 20.

Description

Wedge pliers braking type fall arrest safety lock

The utility model relates to and is used to prevent the wedge pliers braking type mechanical device that the object that hangs falls in a kind of hoisting operation, belongs to hoisting operation security protection technology field.

When existing large-scale component lifts in the high-altitude, a common small sized electric block group of planes moves in the same way synchronously and carries out, as the long 150-200m that uses in the high-building construction, the attached lift scaffold of heavy 50-70t, promptly adopting the 20-30 platform to be installed in 5t electric block on the building carries out promoting in the same way synchronously and descends, but carry because of each extension set in the group of planes is uneven, synchronism is not enough, as not noting, scaffold can produce distortion, even fracture is fallen; And such scaffold length is big, a little less than the relative rigidity, in the lifting as be obstructed and the end is in time got rid of, scaffold is produced be out of shape, rupture, fall, and therefore, when using electric block group of planes hoisting large-size member in the high-altitude, should be equipped with the fall arrest safety lock.Existing fall arrest safety lock has centrifugal brake block formula, spacing fixture block formula etc.Centrifugal brake block formula safety lock makes that rotational parts obtains certain rotating speed in the lock after object falls 0.5-1.0m, could trigger centrifugal action and pin object.The clamp of spacing fixture block formula safety lock is installed in by on the hoisting object, and limiting plate is a stair type, and when object fell, clamp stretched into nearest limiting plate top, treat that the two collides after, limiting plate blocks clamp, stops object to continue to fall.More than two kinds of safety locks be a grade brake type technically, common feature is just can be braked after the big distance of one section of object free-falling.But because of the object quality bigger, big linear velocity and inertia force have been obtained this moment, safety lock should be made very powerfully, otherwise be difficult to bear the impact of huge inertia force, otherwise under the inertia force effect, new distortion and fracture also may take place in the more weak relatively disconnected scaffold support body of rigidity, so such safety lock result of use is undesirable.

The purpose of this utility model then is the problem that exists at above-mentioned prior art, and a kind of simple structure, easy to use, the rapidly effective wedge pliers braking type fall arrest safety lock of braking bob thing are provided.

The purpose of this utility model can reach by following measure:

A kind of be installed in the affixed steel bracket of building on wedge pliers braking type fall arrest safety lock, form by hanging beam, spring, spring base, wedge pincers, skewback, throw-out collar, lever, bearing pin, bumper bar, it is characterized in that wedge pincers 2 are installed on the swash plate 1, the elastic force of spring 3 pushes away wedge pincers 2 for 5 times by spring base, lever 12 ends are by pushing away wedge pincers 2 on the throw-out collar 11, bumper bar 10 clamps 2 jaws from wedge and passes, and its two ends are connected with large-scale component 20.

The purpose of this utility model can also reach by following measure:

The inclined-plane that wedge clamps 2 lower ends is identical with the bevel angle of throw-out collar 11 upper ends, and the jaw of wedge pincers 2 can manufacture flat mouth, V-shaped part, circular arc mouth, and the pincers tooth can manufacture rake tooth, sawtooth.

Swash plate 1 is welded on the steel bracket 6 by the locking angle of wedge pincers 2.

Spacing pressing plate 9 usefulness screws 8 are installed on the swash plate 1, and stop screw 1.6 passes the screw on the spacing pressing plate 9, insert in the skewed slot of wedge pincers 2.

The utility model compared with prior art has following advantage:

1, trigger sensitive: the mode that the gravity of suffered large-scale component 20 is compared on the elastic force that adopts spring 3 and the lever 12 is controlled the closure or openness that intrinsic safety full lock wedge clamps 2 jaws, need not rely on external force triggering block actions such as electricity, magnetic.

2, brake force is big: according to the principle of load self-retention, the wedge pincers adopt flat shape sawtooth jaw interlock rectangle or circular cross-section rigidity bumper bar, or with circular arc, V-arrangement rake tooth, the flexible bumper bar of sawtooth jaw interlock circular cross-section, brake rapidly reliably, downslide amount is little.

3, simple structure: utilize the housing of steel bracket 6 as safety lock, swash plate 1 is welded on the housing by the angle of wedge of wedge pincers 2, the opening and closing dependence wedge pincers 2 of wedge pincers 2 and the locking angle of swash plate 1 and push rod 11 upper ends and wedge clamp the two secondary inclined-planes, inclined-plane of 2 lower ends and finish, and part is few, and function is compound.

The intrinsic safety full lock can be widely used in the hoisting and hanging operation of various lifting appliancies, especially carry out that size is huge, in the upper air installing operation of the large-scale component of Heavy Weight, its function and superiority are comparatively remarkable.

Fig. 1 is the structure of the present utility model and the working state figure of dehiscing.

Fig. 2 is the utility model locking working state figure.

Fig. 3 is mounting means figure of the present utility model.

The utility model will be further described below in conjunction with accompanying drawing:

As shown in Figure 1, swash plate 1 in the utility model is welded on the steel bracket 6 by the locking angle of wedge pincers 2, wedge pincers 2 are installed on the swash plate 1, spring 3 is installed between spring housing 4 and the spring base 5, spring base 5 lower ends contact on the upper surface of wedge pincers 2, lever 12 usefulness bearing pins 14 are installed on the suspension plate 13, lever 12 right-hand members can rest on the suspension ring 15, lever 12 left ends contact the lower surface at throw-out collar 11, the inclined-plane that the inclined-plane of throw-out collar 11 tops and wedge clamp 2 belows fits, and spacing pressing plate 9 usefulness screws 8 are installed on the swash plate 1, and stop screw 16 is installed on the spacing pressing plate 9, and stretch in the elongated slot of wedge pincers 2, bumper bar 10 passes from two wedge pincers 2 of intrinsic safety full lock.The utility model mounting method such as Fig. 3 in hoisting operation, steel bracket 6 roots are installed on the building 22 with bolt pair 18, arm-tie 7 usefulness pull bars of steel bracket 6 ends secondary 17 and bolt pair 18 are hung and are pulled on the building 22, and the electric block of hanging on lever 12 19 hangs large-scale component 20.Bumper bar 10 two ends are connected with large-scale component 20 with wire rope 21, and the middle part is passed from the intrinsic safety full lock.As Fig. 1, when the electric block 19 on being hung in lever 12 normally lifted by crane large-scale component 20, lever 12 suffered pulling force P triggered pulling force P greater than locking _o, i.e. P＞P _oThe time, lever 12 is done swing clockwise, left end upwards promotes throw-out collar 11, make the back of wedge pincers 2 be fitted in its upwards slip of swash plate 1 upper edge, and by spring base 5 compression springs 3, this motion is till lever 12 right-hand members rest on the suspension ring 15, and this moment, two wedges pincers 2 dehisced to be maximum, and the bumper bar 10 that is connected with large-scale component 20 and does elevating movement thereupon can successfully be walked between wedge pincers 2.As Fig. 2, when large-scale component meets accident when falling, be hung in electric block 19 stressed the die-offing on the lever 12, make lever 12 stressed P＜P _oThis moment, spring 3 clamped 2 jaw interlock bumper bar 10 until wedge to lower slider along swash plate 1 by spring base 5 promotion wedge pincers 2, the pincers tooth of jaw is once after stinging embedding bumper bar 10, the gravity of the large-scale component 20 that falls downwards drives wedge pincers 2 by bumper bar 10 to be continued to glide along swash plate T, and make the pincers tooth bumper bar 10 of further nipping, pin bumper bar 10 and large-scale component 20 until wedge pincers 2, prevent large-scale component 20 to fall, lever 12 is made counter-clockwise swing in this process.Spacing pressing plate 9 can limit wedge pincers 2 with stop screw 16 and drop out.The bevel angle that the inclined-plane of throw-out collar 11 tops and wedge clamp 2 belows coincide, and all can be adjacent to swash plate 1 when no matter wedge pincers 2 are slided up or down, keeps doing translation with locking angle.

Wedge pincers 2 can be used Fine Steel Casting iron, low-alloy steel, spring steel manufacturing, and the pincers tooth is through cure process, and bumper bar 10 can be used the carbon constructional quality steel or the wire rope manufacturing of circle or square-section.

Claims

1. the wedge pliers braking type fall arrest safety lock on the steel bracket that is installed in the building Joint, form by steel bracket, spring, spring base, wedge pincers, throw-out collar, lever, bearing pin, bumper bar, it is characterized in that wedge pincers (2) are installed on the swash plate (1), the elastic force of spring (3) is by pushing away wedge pincers (2) under the spring base (5), lever (12) end is by pushing away wedge pincers (2) on the throw-out collar (11), (10 pass from the jaw of wedge pincers (2) bumper bar, and its two ends are connected with large-scale component (20).

2. wedge pliers braking type safety lock according to claim 1 is characterized in that the inclined-plane of wedge pincers (2) lower end is identical with the bevel angle of throw-out collar (11) upper end; The jaw of wedge pincers (2) can manufacture flat mouthful V-shaped part, circular arc mouth, and the pincers tooth can manufacture rake tooth, sawtooth.

3. wedge pliers braking type safety lock according to claim 1 is characterized in that swash plate (1) is welded on the steel bracket (6) by the locking angle of wedge pincers (2).

4. wedge pliers braking type safety lock according to claim 1 is characterized in that spacing pressing plate (9) is installed on the swash plate (1) with screw (8), and stop screw (16) passes the screw on the spacing pressing plate (9), inserts in the skewed slot of wedge pincers (2).