CN2258153Y - Anti-falling safety gear - Google Patents

Abstract

The utility model relates to an anti-falling safety gear whose motion clamping mechanism comprises a spring, a movable body and a steel ball. The machine base of the utility model is provided with an inner cavity with openings respectively arranged at the upper end and the lower end, and the upper part of the inner cavity is provided with a contracting slope which has a narrow upper part and a wide lower part. The moveable body is positioned in the inner cavity of the machine base, a contracting section matched with the contracting slope at the upper part of the inner cavity of the machine base is arranged on the movable body, and the moveable body is provided with an extending end which is extended to the outside of the machine base. The spring provides the upward elastic force for the movable body, and the movable body is provided with a hollow cavity whose upper end and lower end are both provided with an opening. A through hole is transversally arranged at the contracting section of the movable body, and the steel ball is arranged in the through hole.

Description

Falling-proof safety device

The utility model relates to a kind of safety device.

In building engineering, exterior wall raising legs commonly used is constructed.But,, often cause casualties or property damage because of chain rupture accident owing to lack necessary safety method.In addition, in being written into devices such as elevator, gate-type frame, derrick, also might cause the accident because of the hauling rope fracture.In order to address the above problem, China's utility application discloses a kind of miniature falling protector for No. 93204982.6, this falling protector has quiet fixture block, moving fixture block, upper connective plate, lower linking plate, anti-fall plate and housing, when accident is fallen, anti-fall plate is by drop-down, make quiet fixture block and moving fixture block relative motion hold safety rope tightly by upper and lower yoke plate, thereby prevent tenesmus.With regard to above-mentioned existing product, the motion clamping mechanism structure that is made of upper and lower yoke plate and quiet fixture block, moving fixture block is comparatively complicated, and make to be difficult for, and utilize dynamic and static fixture block not too reliable the clamping of safety rope, thus the defective of existing.

The purpose of this utility model is that the clamping structure to falling protector improves, and a kind of simple in structure, safe and reliable falling-proof safety device is provided.

Falling-proof safety device of the present utility model has support and motion clamping mechanism.In the utility model, the motion clamping mechanism has spring, moving body and steel ball.Described support has inner chamber, and the top and bottom of this inner chamber have opening respectively, has up-narrow and down-wide contraction inclined-plane on the top of inner chamber.Described moving body is placed in the support inner chamber, has the up-narrow and down-wide contraction section that the contraction inclined-plane with support inner chamber top adapts on moving body, and the contraction section on this moving body is positioned at the below of the contraction front of described support inner chamber.Moving body has the elongated end that extends to outside the support.Described spring is for imposing the upwards spring of elastic force to moving body.Described moving body has the cavity that upper and lower end all has opening.Laterally offer at the contraction section of moving body the through hole that connects inside and outside the moving body cavity, described steel ball are arranged in this through hole, the outside face of the outstanding moving body contraction section of the sphere of steel ball.In the utility model, the contraction inclined-plane on above-mentioned inner chamber top can be various ways, as interior truncated cone-shaped and interior bucket shape.Corresponding with it, the contraction section on the moving body also can be various ways, as outer truncated cone-shaped and outer bucket shape.In addition, set spring can be top spring, extension spring, ring spring etc., as long as can impose upwards elastic force to moving body.When using falling-proof safety device of the present utility model, fall in case meet accident, the moving body in the device will upward movement.Under the squeese pressure and friction force effect on the contraction inclined-plane on support inner chamber top, steel ball can be with safety rope or the safety lever chucking of setting up, thus the personal casualty of avoiding and property damage.

Falling-proof safety device of the present utility model compared with the aforementioned existing similar products, the motion clamping mechanism structure that is made of spring, moving body and steel ball is comparatively simple, is convenient to make.In addition, when accident was fallen, this device utilized contraction inclined-plane and the squeese pressure between safety rope or the safety lever and the friction force generation self-locking of steel ball and support inner chamber, allows steel ball with safety rope or safety lever chucking, thereby prevents tenesmus safely and reliably.

Content of the present utility model further illustrates with the following Examples, but content of the present utility model is not limited only to content related among the embodiment.

Fig. 1 is the structural representation of falling-proof safety device among the embodiment.

Fig. 2 is the A-A section-drawing.

Shown in Fig. 1～2, the falling-proof safety device in the present embodiment has support 1 and motion clamping mechanism.Described motion clamping mechanism has spring 2, moving body 3 and steel ball 5.Support 1 has inner chamber, and the top and bottom of this inner chamber have opening respectively, has up-narrow and down-wide contraction inclined-plane 6 on the top of inner chamber.Moving body 3 is placed within the inner chamber of support 1, has the up-narrow and down-wide contraction section 7 that the contraction inclined-plane 6 with support inner chamber top adapts on moving body 3, and the contraction section 7 on this moving body is positioned at the below of the contraction front 6 of above-mentioned support inner chamber.Moving body 3 has the elongated end 8 that extends to outside the support.Spring 2 is for imposing the upwards spring of elastic force to moving body 3.Moving body 3 has the cavity that upper and lower end all has opening.Laterally offer at the contraction section 7 of moving body the through hole 9 that connects inside and outside the moving body cavity, steel ball 5 are arranged in this through hole 9, the outside face of the outstanding moving body contraction section 7 of the sphere of steel ball 5.During falling-proof safety device in using present embodiment, can be earlier the support 1 of this device being fixed on aforementioned raising legs etc. desires on the movable parts (as hanging basket) of protective device, and safety rope or safety lever vertically are set, and make safety rope or safety lever pass the cavity of the moving body 3 of this device on the next door of desiring protective device.In the present embodiment hypothesis pass moving body 3 cavity for safety lever 10.In addition, can desire to set up the link gear that links to each other with its hauling rope or tow chain on the protective device, when hauling rope or tow chain did not rupture, this link gear can impose downward pressure to the moving body elongated end 8 in this device, moving body 3 corresponding moving down.At this moment, though the sphere that is positioned at the steel ball 5 of moving body contraction section cross through hole 9 is given prominence to the contraction section outside face of moving body, but owing to moving down of moving body 3, the steel ball sphere does not contact with the contraction inclined-plane 6 on support inner chamber top, steel ball 5 can not push safety lever 10, and the movable parts of desiring protective device can normally upper and lower operation.When hauling rope on desiring protective device or tow chain fracture, link gear disappears to moving body elongated end 8 applied pressures in this device, under the effect of this device medi-spring 2, moving body 3 is up, the part of steel ball 5 outstanding moving body outside faces contacts with the contraction inclined-plane 6 on support inner chamber top, force steel ball 5 to make cross motion to the direction of safety lever 10 in cross through hole 9, steel ball surface contacts with a certain section of safety lever 10.Steel ball surface is with after a certain section of safety lever 10 contacts, the friction force between steel ball and the safety lever will stop steel ball and and the moving body 3 of steel ball one and safety lever 10 between do relative motion, i.e. moving body 3 transfixion on this section of safety lever.At this moment, because of hauling rope or the traction chain break of desiring protective device, desire the movable parts of protective device and the support 1 that is fixed on this movable parts and all desire to fall downwards.Relative motions take place in support 1 and the relative actionless moving body 3 desiring to fall downwards, are equivalent to moving body 3 upward movement by force in the inner chamber of support 1, and then make the part of steel ball 5 outstanding moving body outside faces arrive the more narrow region on contraction inclined-plane 6.Therefore steel ball is squeezed, form self-locking producing powerful friction force simultaneously between steel ball and the safety lever 10 and between the inner chamber of steel ball and support 1, stop relative motion between support and the safety lever, that is relative motion between the safety lever under the movable parts of the desire protective device that is fixed together of prevention and support, thereby prevent the movable parts accidental falling of desiring protective device, guarantee safety of life and property.In addition, the use occasion that is having, the movable parts of desiring protective device upward movement only when normal operation, then can not desire to set up the above-mentioned link gear that links to each other with its hauling rope or tow chain on the protective device this moment, promptly do not need in advance the elongated end 8 of the moving body in this device is imposed downward pressure, allow moving body be in shifting state down.This be because, when support 1 along with the movable parts of desiring protective device is normal when up, the relative motion trend between support 1 and the moving body 3 makes steel ball 5 be tending towards moving downward, and promptly shifts to the wide region on contraction inclined-plane 6, therefore steel ball 6 can not be squeezed, and can not produce above-mentioned locking phenomenon.And when falling when meeting accident, support 1 is descending, just can produce above-mentioned locking phenomenon.In the present embodiment, for the ease of the elastic force of processing and fabricating and regulating spring 2, the lower openings place in chamber has offered negative thread within support 1, and is provided with swivel nut 11 at this opening part, has the outside thread that matches with the negative thread of inner chamber bottom on the swivel nut 11.Above-mentioned spring 2 is the top spring between the bottom of the upper surface that is arranged at swivel nut 11 and moving body 3.The contraction inclined-plane 6 on support inner chamber top is interior round table surface in this example, and the contraction section 7 on the moving body is outer round table surface.Present embodiment is provided with three cross through hole altogether at the contraction section 7 of moving body, and is corresponding, and the quantity of steel ball 5 also is three.Certainly, also can suitably increase and decrease the quantity of cross through hole and steel ball as required.In addition, also set up holding screw 12, the setting of this screw 12 both can be played auxiliary directional tagging to the motion of moving body 3, helped again where necessary to moving body 3 location (as when this device is installed).For ease of link gear the moving body elongated end 8 in this device is imposed downward pressure, this is on this elongated end 8 has set up assembly cap 4.

Claims (3)

1, a kind of falling-proof safety device, have support and motion clamping mechanism, it is characterized in that described motion clamping mechanism has spring, moving body and steel ball, described support has inner chamber, the top and bottom of this inner chamber have opening respectively, has up-narrow and down-wide contraction inclined-plane on the top of inner chamber, described moving body is placed in the support inner chamber, on moving body, has the up-narrow and down-wide contraction section that the contraction inclined-plane with support inner chamber top adapts, contraction section on this moving body is positioned at the below of the contraction front of described support inner chamber, described moving body has the elongated end that extends to outside the support, described spring is for imposing the upwards spring of elastic force to moving body, on described moving body has, the lower end all has the cavity of opening, laterally offer at the contraction section of moving body and to make the through hole that connects inside and outside the moving body cavity, described steel ball is arranged in this through hole, the outside face of the outstanding moving body contraction section of the sphere of steel ball.

2, safety device as claimed in claim 1, it is characterized in that having negative thread at the lower openings place of described inner chamber, be provided with swivel nut at this opening part, have the outside thread that matches with the negative thread of inner chamber bottom on the swivel nut, described spring is the top spring that is arranged between swivel nut upper surface and the moving body bottom.

3, safety device as claimed in claim 1, the contraction inclined-plane that it is characterized in that described inner chamber top is interior round table surface, the contraction section on the described moving body is outer round table surface.

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