CN2369703Y

CN2369703Y - Anti-fall device

Info

Publication number: CN2369703Y
Application number: CN 99231550
Authority: CN
Inventors: 余汉祥
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-05-06
Filing date: 1999-05-06
Publication date: 2000-03-22
Anticipated expiration: 2009-05-06

Abstract

The utility model relates to an anti-fall device, which is provided with a machine base, a constraint body and a spring. Clamping pieces are arranged in the transversal through holes of the constraint body. The utility model is characterized in that the clamping pieces are respectively sheathed on wedge blocks in each transversal through hole, and the outer end surface of each wedge block is a slope which is matched with the shrinkage slope of the inner cavity of the machine base. A protrusion is arranged on the center of the lower end of the machine base, the upper part of the protrusion is convexly arranged in the opening of the lower end of the vertical hollow cavity of the constraint body to be contacted with the lower part of the inner end surface of the wedge block; slopes which are mutually matched are arranged on the outer wall of the upper part of the protrusion and on the lower part of the inner end surface of the wedge block, and the rate of grade of each slope is equal to the rate of grade of the shrinkage slope of the inner cavity of the machine base.

Description

Anti-fall device

The utility model relates to a kind of safety device.

China's utility application discloses a kind of falling-proof safety device No. 962469991.2, this device is by support, moving body, spring and holder constitute, inner chamber upper chambers wall at support is provided with up-narrow and down-wide contraction inclined-plane, 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, on having on the moving body, the vertical cavity of lower ending opening, contraction section at moving body also offers the cross through hole that ecto-entad leads to vertical cavity, holder is arranged in this cross through hole, moving body also can be described as the obligatory point that this holder is imposed constraint, and set spring is for imposing the upwards spring of elastic force to moving body.When stating device in the use, fall in case meet accident, the moving body in the device can move upward, under the extruding on the contraction inclined-plane on support inner chamber top, inwardly motion and safety rope or the bumper bar of setting up clamped of holder, by force to the blocking-up process of falling, thus the casualties of avoiding.In said apparatus, holder adopts steel ball.Contact owing to be point-like between the holder of this steel ball form and the caught object, contact stress is bigger, and the contact site can produce moderate finite deformation in the use, and the morphology of destruction steel ball and caught object influences service life of caught object.Particularly when gripped object is the object of flexible class (as steel wire rope), its secondary face rings then bigger, and then anti-fall performance is weakened, and the scope of application of device also is restricted.

The purpose of this utility model is the defective that overcomes above-mentioned existing anti-fall device, and a kind of anti-fall device that prolongs holder and caught object service life is provided.

The purpose of this utility model realizes in the following manner: change holder into voussoir by steel ball, meeting accident when falling, allow the end face of voussoir contact with caught object, that is contact the face contact that changes voussoir into the point of caught object by steel ball, thereby alleviate destruction, prolong its service life holder and caught object.Specifically, anti-fall device of the present utility model has support, obligatory point and spring, described support has inner chamber, the top and bottom of this inner chamber have opening respectively, the upper chambers wall of described inner chamber has up-narrow and down-wide contraction inclined-plane, described obligatory point is placed in the support inner chamber, described obligatory point has the elongated end that extends to outside the support, on having on the obligatory point, the vertical cavity of lower ending opening, on obligatory point, offer at least two ecto-entads and lead to the cross through hole of described vertical cavity, this cross through hole is relative with the contraction inclined-plane of described support inner chamber, in each cross through hole, be provided with holder, described spring is for imposing the upwards spring of elastic force to obligatory point, it is characterized in that described holder is for being placed on the voussoir in each cross through hole respectively, described voussoir and cross through hole are slidingly matched, in the voussoir, the outer face contraction inclined-plane with the vertical cavity of obligatory point and support inner chamber respectively is relative, the inclined-plane of the outer face of voussoir for matching with the contraction inclined-plane of described support inner chamber, central authorities have projection in the lower end of support, this projection has and the relative vertical through holes of the vertical cavity of obligatory point, this protruding top protrude into advance under the vertical cavity of obligatory point end opening and contact with the inner face bottom of described voussoir, the inner face bottom of wall and voussoir has the inclined-plane that cooperatively interacts outside this protruding top, and the slope on described inclined-plane equates with the slope on the contraction inclined-plane of support inner chamber.Similar with aforementioned existing product, the contraction inclined-plane on the inner chamber top in the utility model device can be various ways, as interior truncated cone-shaped and the interior bucket shape that upwards shrinks.Set spring can be top spring, extension spring, ring spring etc., as long as can impose upwards elastic force to obligatory point.The cross through hole of offering on obligatory point can be two or three, four etc., considers from the angle of being convenient to process, especially to offer two for good.In addition, for when blocking-up is fallen, allow voussoir inner face can and caught object between produce bigger frictional force, the inner face of voussoir can be made into the shape that the profile with caught object adapts usually.The operation principle of the utility model device is also similar with aforementioned existing apparatus, promptly is this device to be fixed in desire on the protector, and utilizes the desire protector that the elongated end of the obligatory point of this device is applied downward pressure.When causing accidental falling when the traction piece generation fracture of desiring protector, desire the pressure disappearance of protector to the obligatory point elongated end, this obligatory point moves upward under the effect of spring force, the corresponding inside transverse movement of voussoir and clamp gripped object (as safety rope or bumper bar) stops and desires protector and further drop.

Anti-fall device of the present utility model is compared with aforementioned existing same device, because being face between voussoir and the caught object contacts, thereby reduced contact stress, reduced the distortion between contact-making surface greatly, not only help prolonging the service life of holder and caught object, and can shorten braking distance, the range of application of expansion instrument.

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 anti-fall device among the embodiment.

Fig. 2 is the A-A profile of Fig. 1.

As shown in Figure 1, 2, the anti-fall device in the present embodiment has support 1, obligatory point 2 and spring 3.Support 1 has inner chamber 4, and the top and bottom of this inner chamber 4 have opening respectively.The upper chambers wall of inner chamber 4 has up-narrow and down-wide contraction inclined-plane 5.Obligatory point 2 is placed in the support inner chamber 4, and this obligatory point 2 has the elongated end 6 that extends to outside the support.The vertical cavity 7 that on obligatory point, has the upper and lower end opening.Offer the cross through hole that ecto-entad leads to vertical cavity 7 in this example on obligatory point, this cross through hole is relative with the contraction inclined-plane 5 of support inner chamber.In each cross through hole, be provided with holder 8.Set spring 3 is for imposing the upwards spring of elastic force to obligatory point.In the present embodiment, above-mentioned holder 8 is especially for being placed on the voussoir in each cross through hole respectively, described voussoir 8 is slidingly matched with cross through hole, in the voussoir 8,

outer face

9,10 the contraction inclined-plane 5 with the vertical cavity 7 of obligatory point and support inner chamber is relative respectively, the inclined-plane of outer face 10 for matching of voussoir with the contraction inclined-plane 5 of described support inner chamber, has projection 11 in the lower end of support 1 central authorities, this projection 11 has the vertical through holes 12 relative with the vertical cavity of obligatory point 7, the top of this projection 11 protrudes under the vertical cavity 7 of described obligatory point end opening and contacts with the bottom of described voussoir inner face 9, the bottom of wall and voussoir inner face 9 has the inclined-plane 13 that cooperatively interacts outside this protruding top, 14, this inclined-

plane

13,14 slope equates with the slope on the contraction inclined-plane 5 of support inner chamber.The using method of anti-fall device is identical with aforementioned existing product in the present embodiment, promptly earlier the support 1 of this device being fixed on hoisting frame etc. desires on the moving component (as hanging basket) of protector, and safety rope or bumper bar vertically are set, and make safety rope or bumper bar pass the cavity of the obligatory point 2 of this device on the next door of desiring protector.In the present embodiment hypothesis pass obligatory point 2 cavity for bumper bar 15.In addition, can desire to set up the link gear that links to each other with its pull rope or haulage chain on the protector, when pull rope or haulage chain did not rupture, this link gear can impose downward pressure to the elongated end 6 of the obligatory point in this device, obligatory point 2 corresponding moving down.When obligatory point moves down, because the guide effect of the lower bevel 14 of 13 pairs of voussoir inner faces of upper inclined surface of support lower lobes, two voussoirs 8 all in cross through hole separately to the motion of the lateral direction of support, can not push bumper bar 15, the moving component of desiring protector can normally upper and lower operation.When pull rope on desiring protector or haulage chain fracture, link gear disappears to obligatory point elongated end 6 applied pressures in this device, under the effect of this device medi-spring 3, obligatory point 2 is up, the 5 corresponding outer faces 10 of pushing voussoir, contraction inclined-plane on support inner chamber top, force voussoir 8 to do transverse movement to the direction of bumper bar 15 in cross through hole, voussoir inner face 9 contacts with a certain section of bumper bar 15.Voussoir inner face 9 is with after a certain section of bumper bar 15 contacts, the frictional force between voussoir and the bumper bar will stop voussoir and and the obligatory point 8 of voussoir one and bumper bar 15 between do relative motion, i.e. obligatory point 2 transfixion on this section of bumper bar.At this moment, because of pull rope or the traction chain break of desiring protector, desire the moving component of protector and the support 1 that is fixed on this moving component and all desire to fall downwards.Relative motion takes place with relative actionless obligatory point 2 in the support of desiring to fall downwards 1, is equivalent to obligatory point 2 and moves upward by force in the inner chamber of support 1, and then make obligatory point 2 arrive the more narrow region that the support inner chamber shrinks inclined-plane 6.Therefore voussoir 8 is subjected to bigger inside pushing force, form self-locking producing powerful frictional force simultaneously between voussoir 8 and the bumper bar 15 and between the inner chamber of voussoir 8 and support 1, stop relative motion between support 1 and the bumper bar 15, that is the moving component of the desire protector that is fixed together of prevention and support and the relative motion between the bumper bar, thereby prevent the moving component accidental falling of desiring protector, guarantee safety of life and property.In addition, the use occasion that is having, the moving component of desiring protector only moves upward when normal operation, then can not desire to set up the above-mentioned link gear that links to each other with its pull rope or haulage chain on the protector this moment, promptly do not need in advance the elongated end 6 of the obligatory point in this device is imposed downward pressure, allow obligatory point be in shifting state down.This be because, when support 1 along with the moving component of desiring protector is normal when up, the relative motion trend between support 1 and the obligatory point 2 makes voussoir 8 be tending towards moving downward, and promptly shifts to the wide region on contraction inclined-plane 5, therefore voussoir 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.The contraction inclined-plane 5 on support inner chamber top is interior round table surface in this example.Present embodiment is provided with two cross through hole altogether on obligatory point 2, corresponding, and the quantity of voussoir 8 also is two.Certainly, also can suitably increase the quantity of cross through hole and voussoir as required.In the present embodiment, elastic force for the ease of processing and fabricating and regulating spring 3, lower openings place at the support inner chamber is provided with internal thread, 11 of the projectioies of above-mentioned support lower end central authorities are served as by the swivel nut that is arranged at this opening part, and the external screw thread on the described swivel nut 11 matches with the internal thread of support inner chamber bottom.In addition, above-mentioned spring 3 is the top spring on the projection that is placed on swivel nut 11, and the bottom connection of the upper end of this top spring 3 and obligatory point 2 touches.By turn swivel nut 11, i.e. the jacking force of adjustable springs 3.The elongated end 6 of the obligatory point in the present embodiment is protruding by the top of support 1.Certainly, if allow above-mentioned elongated end 6 stretch out (this moment, the sidewall of support should correspondingly be offered the vertical chute that allows it stretch out) by the sidewall of support 1, the link gear of peripheral hardware can impose downward pressure and make it descending equally it.On this elongated end, also be equipped with adjusting nut 16 herein.The link gear that the adjusting nut of setting up 16 is convenient to peripheral hardware imposes downward pressure to this elongated end 6, simultaneously, and by regulating this adjusting nut 16, the downstream position of also adjustable joint obligatory point in support, that is the distance of two voussoirs when inwardly not clamping.Also set up obligatory point holding screw 17 in this example, the setting of this screw 17 both can be played auxiliary guide effect to the motion of obligatory point 3, helped again where necessary to obligatory point 3 location (as when this device is installed).

Claims

1, a kind of anti-fall device, has support, obligatory point and spring, described support has inner chamber, the top and bottom of this inner chamber have opening respectively, the upper chambers wall of described inner chamber has up-narrow and down-wide contraction inclined-plane, described obligatory point is placed in the support inner chamber, this obligatory point has the elongated end that extends to outside the support, on having on the obligatory point, the vertical cavity of lower ending opening, on obligatory point, offer at least two ecto-entads and lead to the cross through hole of described vertical cavity, this cross through hole is relative with the contraction inclined-plane of described support inner chamber, in each cross through hole, be provided with holder, described spring is for imposing the upwards spring of elastic force to obligatory point, it is characterized in that described holder is for being placed on the voussoir in each cross through hole respectively, described voussoir and cross through hole are slidingly matched, in the voussoir, the outer face contraction inclined-plane with the vertical cavity of obligatory point and support inner chamber respectively is relative, the inclined-plane of the outer face of voussoir for matching with the contraction inclined-plane of described support inner chamber, central authorities have projection in the lower end of support, this projection has and the relative vertical through holes of the vertical cavity of obligatory point, this protruding top protrudes under the vertical cavity of described obligatory point end opening and contacts with the inner face bottom of described voussoir, the inner face bottom of wall and voussoir has the inclined-plane that cooperatively interacts outside this protruding top, and the slope on described inclined-plane equates with the slope on the contraction inclined-plane of support inner chamber.

2, anti-fall device as claimed in claim 1, it is characterized in that having internal thread at the lower openings place of support inner chamber, the projection of described support lower end central authorities is served as by the swivel nut that is arranged at this opening part, and the external screw thread on the described swivel nut matches with the internal thread of support inner chamber bottom.

3, anti-fall device as claimed in claim 1 is characterized in that described spring is the top spring that is placed on the projection of support lower end, and the upper end of this top spring and the bottom connection of obligatory point touch.

4, anti-fall device as claimed in claim 2 is characterized in that described spring is the top spring that is placed on the projection of described swivel nut, and the upper end of this top spring and the bottom connection of obligatory point touch.

5, as claim 1 or 2 or 3 or 4 described anti-fall devices, it is characterized in that the elongated end of described obligatory point is protruding by the support top, on this elongated end, be equipped with adjusting nut.