CN200971751Y - Locking device for telescopic lalder - Google Patents
Locking device for telescopic lalder Download PDFInfo
- Publication number
- CN200971751Y CN200971751Y CN 200620126632 CN200620126632U CN200971751Y CN 200971751 Y CN200971751 Y CN 200971751Y CN 200620126632 CN200620126632 CN 200620126632 CN 200620126632 U CN200620126632 U CN 200620126632U CN 200971751 Y CN200971751 Y CN 200971751Y
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- ladder
- plane
- shank
- location
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
- E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
- E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
- E06C1/125—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic with tubular longitudinal members nested within each other
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Abstract
The utility model discloses a locking device of retractable ladder, including a lock-pin mechanism. The lock-pin mechanism includes a pin body, a locating hole and a spring. The locking device is characterized in that an unlocking bevel and a locating bevel are fixed alternately on the pin body; on cross piece of adjacent sections, an embedding cooperation part is mounted in correspondence with the unlocking bevel and the locating bevel; the unlocking bevel faces head of the pin body and inclines to adjacent section side with corresponding embedding cooperation part; facing direction of the locating bevel is just the opposite of the unlocking bevel; when the upper one section or lower one section retracts on current section, embedding cooperation part of this section props against the unlocking bevel and pushes the pin body to shrink inside and get away from the locating hole; at the same time, the other embedding cooperation part contacts with the locating bevel for locating. While the utility model is in use, as long as other ordinary retracting and positioning device is fixed on the lowest or highest section of the retractable ladder, the whole retractable ladder can be positioned at a retraction state. Thus the utility model further facilitates carrying of the retractable ladder.
Description
Technical field
The utility model relates to a kind of ladder, is specifically related to the locking device on the extension ladder that a kind of many section of ladder constitutes.This locking device not only can be locked in deployed condition with two adjacent section of ladders of extension ladder, also can locate the rounding state of two adjacent section of ladders.
Background technology
The ladder that is used for ascend operation is widely used in production, various fields in life such as building, installation, family.And original ladder all is fixed, and is very long, volume is big, can not fold, and exists carrying, moves inconvenient and the collection big defective that takes up room.
Therefore, extension ladder had appearred afterwards, announced on February 6th, 2002 disclosed as Chinese patent, the patent No. is 95117319.7 patents of invention that are called " telescopic ladder ", the ladder that a kind of integral body is in the longitudinal direction drawn in, shortened is disclosed in this patent scheme, it comprises the section of ladder of n section " Jiong " type, and every section section of ladder has a pair of column parallel to each other and that be provided with at interval and a crossbeam that is connected with the column upper end; The column of each section section of ladder injects and is close to it and hangs down socket connection in column through hole of one section than it; And between each section section of ladder, being provided with gripping mechanism and back-off assembly, its gripping mechanism and back-off assembly structure are: gripping mechanism is the bayonet lock device that pin, locating hole and slide block constitute, and pin comprises the convex camber at neck and rear portion; Slide block is installed in the crossbeam of section of ladder and can slides up and down, and has first shoe surface on this slide block, and the neck side contacts of the convex camber of it and pin withdraws from pin from the locating hole of the lap of two sections section of ladder columns; Also have second shoe surface on the slide block, it contacts with the neck opposite end with another of pin convex camber, promotes pin and embeds in the hole of two sections section of ladder column laps; Also act on the slide block its dipper crowding gear that moves down of promotion is arranged; Back-off assembly is a boss, and the relative slide block of boss is located on the upper surface of adjacent next section section of ladder, and when adjacent two sections section of ladders drew in, the slide block that the boss on next section section of ladder upwards withstands this section of ladder forced on it and moves.
To above-mentioned patent scheme, as seen we analyze the back, its gripping mechanism and back-off assembly just play the effect of locking and release under deployed condition, when ladder is inoperative fully under rounding state, though be that each section of ladder can draw in, mention when moving but draw back one in, each section of ladder can launch again voluntarily because of gravity, and this just fails to reach fully and is convenient to the effect of moving, collecting after extension ladder draws in.For this reason, we need a kind of can be dexterously with section of ladder at deployed condition and rounding state lockable location locking device of living all.
Summary of the invention
The utility model is located the technical problem that deployed condition between section of ladder can not be located the rounding state between section of ladder only for the locking device that solves prior art, and a kind of locking device of new-type extension ladder is provided.
For achieving the above object, the technical solution adopted in the utility model is: a kind of locking device of extension ladder, comprise latch gear, described latch gear comprises shank, locating hole and acts on spring on the shank that described shank is located in the crosspiece of section of ladder towards vertical column expanding with its head; The column of adjacent section of ladder is offered above-mentioned locating hole corresponding to the shank head under deployed condition with on the lap of this section of ladder column, described acting force of the spring forces the shank head to embed with locating hole to cooperate; It is characterized in that: be interval with a release inclined-plane and inclined-plane, a location on the described shank; Respectively be provided with an embedding auxiliary section corresponding to release inclined-plane and inclined-plane, location on an adjacent last section of ladder or the crosspiece of next section of ladder; Described release inclined-plane and inclined-plane, location all tilt forward and back on the flexible direction of shank, and the release inclined-plane is towards shank head side and oblique to being provided with the corresponding adjacent section of ladder inclination that embeds the auxiliary section, and inclined-plane, location and release inclined-plane are towards antithesis; When an adjacent last section of ladder or next section of ladder drew on this section of ladder, one on it embedded the auxiliary section and offsets with the release inclined-plane and cooperates, promotes the disengaging locating hole that contracts in the shank, and another on it embeds auxiliary section and locate the inclined-plane and contact cooperation and locate simultaneously.
Technique scheme comprises following further scheme:
1, in the such scheme, further preferred version is: described release inclined-plane and inclined-plane, location are provided with on the shank stage casing face-to-face, form one with this on shank and embed the room; Corresponding to embedding the room, convex with an insert on adjacent a last section of ladder or next the section of ladder crosspiece, on this insert, be provided with described two and embed auxiliary sections, this two embeds auxiliary section and is the contact inclined-plane, they with corresponding release inclined-plane with locate the inclined-plane complementation.
2, in the such scheme, the reliability of locking when launching in order further to improve, can adopt following scheme: described shank comprises a housing, accommodate a swing component on the housing back segment, the front end face of this swing component is described release inclined-plane, the left and right sides of swing component front end is provided with projection, and the rear portion of swing component is located at through pivotable frame between the left and right sides sidewall of housing, and an extension is extended in bending on the rearward end of swing component; Described spring is a stage clip, and it is pressed on the extension from the rear end, and the promotion shank protracts and makes the swing of swing component front end; Corresponding to offering a dead slot mouth on the crosspiece surface, position after the swing of swing component front end, corresponding described projection is provided with locating slot on the dead slot mouth edge; Swing component is under swing state, and its front end embeds in the dead slot mouth, and the front end upper protruding block embeds with locating slot and cooperates.This has just increased by a shank anticreep safeguard measure; before the shank head, stretch in the locating hole section of ladder and become to launch locking shape following time; because of swing component can be at the spring action lower swing; its upper protruding block cooperates card mutually with locating slot; shank is positioned at the state of protracting; at this moment touching the shank head with external force does not have anti-yet; shank does not contract in not understanding yet; have only after a last section of ladder or the gathering of next section of ladder; when the embedding auxiliary section on it and the release inclined-plane of swing component front end offset; swing component is pressed down, make projection break away from locating slot, this positioning action just automatically terminates.
3, in the such scheme, when each section of ladder stretched, the shank head slided because of spring force can be against on the column internal face, in order to reduce friction, avoid wearing and tearing, can on the shank head, be provided with a roller, by roller sliding friction is become rolling friction, reduce the wearing and tearing on shank head and the column inner face.
4, in the such scheme, the crosspiece that described " expansion " is meant two section of ladders is each other at a distance of the state of certain (predefined) spacing; " gathering " is meant the state the when crosspiece of two section of ladders contacts with each other.
5, in the such scheme, described release inclined-plane can be parallel to each other with the inclined-plane, location, also can be not parallel, and the best is that both parallel, and gradients are about 45 °, and another person is about 135 °.
Installation site and operating principle during of the present utility model the use are as follows: decide according to extension ladder overall structure situation installation site of the present utility model during use, in general, for the nested from top to bottom extension ladder that forms of the section of ladder of " Jiong " type, be that latch gear is arranged in the end of crosspiece during installation, and the release inclined-plane on the shank and the location inclined-plane all should expose on the soffit of crosspiece; And relative insert should be convexly set on the crosspiece upper surface of adjacent next section of ladder.And for the nested from top to bottom extension ladder that forms of the section of ladder of " ㄩ " type, be that latch gear is arranged in the end of crosspiece during installation, and the release inclined-plane on the shank and the location inclined-plane all should expose on the upper surface of crosspiece; And relative insert should be convexly set on the soffit of crosspiece of an adjacent last section of ladder.
When drawing in like this, as the extension ladder of " Jiong " type section of ladder be the bottom section of ladder a section move gathering on relatively, and the extension ladder of " ㄩ " type section of ladder be the top section of ladder a section move down gathering relatively, no matter be which kind of extension ladder, adjacent last section of ladder draws its crosspiece of back in and relies on this section of ladder crosspiece, insert on it all can cooperate with release inclined-plane on the shank of this section of ladder, make in the shank and contract, the locking of deployed condition is unlocked, this section of ladder also moves with last section of ladder, in release, location Embedded Division on the insert also embeds in the shank and cooperates with the inclined-plane, location, and moving its shank head of back because of the release of this section of ladder staggers mutually with the locating hole of adjacent section of ladder, the shank head just is against on the column inner face of adjacent section of ladder, shank can't be protruding again, make the location Embedded Division on the insert remain on mated condition with the inclined-plane, location, because of the inclined-plane, location is barb-like inclined-plane, insert is similar to and is hooked on the inclined-plane, location, make this section of ladder and last section of ladder be positioned at rounding state, have only when back one section of ladder launches again again, locating hole is heavy to align with the shank head, in the overhanging again again embedding locating hole of shank, the location Embedded Division of locating simultaneously on inclined-plane and the insert also breaks away from automatically, and this section of ladder removes with the gathering positioning solution of last section of ladder.
Through above-mentioned analysis, visible the utility model compared with prior art has following advantage:
1, the utility model not only can lock the deployed condition of two section of ladders reliably, also but relative positioning is lived the rounding state of two section of ladders, during use as long as on bottommost one section of ladder of extension ladder or topmost one section of ladder, other general gathering positioners are set, whole extension ladder can be positioned at rounding state, be more convenient for like this moving, this also makes extension ladder also can draw under suspension status on the other hand, and making extension ladder hang to use as the loft ladder that can draw in becomes possibility.
2, the utility model is easy to operate, when the utility model need launch, as long as untie the gathering positioner of bottommost one section of ladder or topmost one section of ladder, the gathering positioning instant meeting one on other each section of ladders is untied successively in linkage automatically, and whole ladder has launched successively one by one with regard to one.
3, the utility model function by force, cost simple in structure is low cheap again, the utility model is the lock in place function that has reached two states with a locking device, simpler on its structure, its cost of manufacture is compared with the locking device of existing simple function, remains basically stable even also slightly decline.
Description of drawings
Accompanying drawing 4 is an A place operating state schematic diagram one in the accompanying drawing 3, locating hole among the figure on the section of ladder column of expression bottom and the shank head misalignment on the section of ladder of middle part, and the section of ladder at middle part becomes to draw in the state of location;
Accompanying drawing 5 is an A place operating state schematic diagram two in the accompanying drawing 3, and the locating hole among the figure on the section of ladder column of expression bottom is aimed at the shank head on the section of ladder of middle part, and the section of ladder at middle part can be removed the state that launch the location at once;
Accompanying drawing 8 is the local enlarged diagram in B place in the accompanying drawing 7;
Accompanying drawing 10 is the decomposing schematic representation of shank in the present embodiment;
Accompanying drawing 11 is two sections section of ladders of the top structural representation partly that utilizes the extension ladder of present embodiment;
In the above accompanying drawing: 1, section of ladder; 2, column; 3, crosspiece; 4, filler rod; 5, guide groove; 6, latch gear; 7, shank; 8, locating hole; 9, spring; 10, release inclined-plane; 11, inclined-plane, location; 12, embed the auxiliary section; 13, embed the auxiliary section; 14, embed the room; 15, insert; 16, housing; 17, swing component; 18, projection; 19, pivot; 20, extension; 21, dead slot mouth; 22, locating slot; 23, roller; 24, elasticity spacer; 25, projection; 26, standing block hole; 27, installing rack; 28, auxiliary extension spring; 29, extension ladder; 30, stopper; 31, adjustment hole; 32, limited block; 33, tabs.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment: shown in accompanying drawing 1, accompanying drawing 2, one has utilized the extension ladder 29 that the loft ladder uses that can be used as of this locking device, its concrete aluminium extruded sections that adopts is made, and can be used as flexible loft ladder and use, its stretching structure is spliced to form by n section section of ladder 1, n is 〉=3 positive integer, is provided with locking device between adjacent two sections section of ladders 1, and every section section of ladder 1 constitutes " " shape structure by two columns that be arranged in parallel 2 and a crosspiece 3 that is connected between two root posts, 2 lower ends; A described 2n column 2 adopts the cross section identical profiles, before and after its outside, cross section along on establish a pair of chute 5, and the front and back of inboard, cross section along on establish a pair of sliding muscle 4 (seeing the column cross section shown in the accompanying drawing 12 for details); Two root posts 2 of same section section of ladder 1 are symmetrically arranged, the chute 5 in two columns, 2 outsides of each section of ladder 1 is slidingly connected along column 2 length directions with the sliding muscle 4 of two columns, 2 inboards of next section section of ladder 1, with this n section section of ladder 1 nested formation stretching structure that slides from top to bottom.(seeing for details shown in the accompanying drawing 3,6,7).And a pair of chute 5 cooperates with a pair of sliding muscle 4, makes 2 on column column 2 and adjacent next section section of ladder 1 of each section section of ladder 1 only exist one to go up the degree of freedom (seeing the column cross section shown in the accompanying drawing 12 for details) of sliding along its length.
Shown in accompanying drawing 3,4,5,7, the locking device of this enforcement is set between each section of ladder in extension ladder 29, and the concrete structure of this locking device is as follows: it is arranged on latch gear 6 in the section of ladder crosspiece 3 and a correspondence by one and is convexly equipped with on adjacent insert 15 on a section of ladder crosspiece 3 soffits and cooperates and constitute; Described latch gear 6 comprises shank 7, locating hole 8 and acts on spring 9 on the shank 7, described shank 7 heads are towards column 2 flexible being located in the crosspiece 3 of section of ladder 1, the column 2 of adjacent section of ladder 1 is offered above-mentioned locating hole 8 corresponding to shank 7 heads under deployed condition with on the lap of this section of ladder 1 column 2, described spring 9 active forces force shank 7 heads to embed with locating hole 8 to cooperate; And shank 7 one sides are provided with tabs 33, are stuck in 2 pairs of shanks of column, 7 overhanging states by this tabs 33 and carry out spacing (seeing shown in the accompanying drawing 10).
Shown in accompanying drawing 9 and accompanying drawing 10, described shank 7 is made of the roller 23, stopper 30 and the swing component 17 that hold backward in a housing 16 and the housing 16 in the past; In the described shank head roller is set, is against on column 2 inner faces with roller and rolls, reduce friction; Stopper 30 fixedly is embedded in housing 16, and the rear portion of swing component 17 is erected at through pivot 19 between the left and right sides sidewall of housing 16, and an extension 20 is extended in bending downwards on the rearward end of swing component 17; Swing component 17 heads and stopper 30 leave one and insert room 14; The front end of swing component 17 is provided with separates pin inclined-plane 10, and the rear end of stopper 30 is provided with inclined-plane 11, location, release inclined-plane 10 is towards front end shank 7 head side and tilt upward, and inclined-plane 11, location and release inclined-plane 10 be towards antithesis, and it is towards the afterbody of rear end shank 7 and tilt downwards; Release inclined-plane 10 parallels with inclined-plane 11, location, and its gradient is 40 ° and 135 °.And corresponding shank 7 upper surfaces are provided with dead slot mouth 21 on the crosspiece 3, and swing component 17 and stopper 30 all are exposed on the upper surface of crosspiece 3.At this stopper 30 is a separate piece, employing be soft aluminium, certainly without stopper, and directly extend oblique sheet from housing 16, set an inclined-plane 11, position thereon and also can.
See shown in Figure 3, with above-mentioned latch gear 6 corresponding inserts 15 be with shank 7 on insertion room 14 be complementary, also corresponding release inclined-plane 10 is provided with inclined-plane 11, location and embeds auxiliary section 12 and 13 on the insert 15, and this embedding auxiliary section 12 and 13 is and the inclined-plane of release inclined-plane 10 with inclined-plane, location 11 corresponding complementary; When an adjacent last section of ladder 1 draws on this section of ladder 1, insert 15 embeds and inserts in the room 14, embedding auxiliary section 12 on it offsets with release inclined-plane 10 and cooperates, and promotes to contract in the shank 7 to break away from locating hole 8, and another on it embeds auxiliary section 13 and contact cooperation with inclined-plane 11, location simultaneously.At this, be to have adopted an insert 15, on insert 15, not only establish embedding auxiliary section 12 but also establish embedding auxiliary section 13, cooperate with release inclined-plane 10 and inclined-plane 11, location simultaneously with this, this is a preferred plan, still, and two inserts of also available employing in the reality, inclined- plane 11,10, one insert corresponding matching location, one insert corresponding matching release inclined-plane.
Shown in accompanying drawing 3, accompanying drawing 8, accompanying drawing 9, the left and right sides of described swing component 17 front ends is provided with projection 18, and described spring 9 is a stage clip, and it is pressed on the extension 20 from the rear end, and promotion shank 7 protracts and makes and puts on swing component 17 front ends; And corresponding projection 18 is provided with locating slot 22 on the bead of dead slot mouth 21, swing component 17 is under last pendulum state, its front end embeds in the dead slot mouth 21, front end upper protruding block 18 embeds with locating slot 22 and cooperates, with this shank 7 is located under the state of protracting, prevent that shank 7 heads are subjected to after the external force effect misoperation to take place, increased the reliability of deployed condition locking.
Shown in accompanying drawing 3,6,7,12, the column 2 of whole extension ladder 29 all is to adopt the rod member section bar of tabular to make, their thickness is all thinner, wherein, except that one section of ladder 1 of top, column 2 structures of other each section of ladder 1 are all identical, all are: filler rod 4 is established along upper edge column 2 length directions in the front and back of column 2 inside walls, and the front and back on the lateral wall are along being provided with guide groove 5; When two section of ladders 1 connect up and down, in the guide groove 5 of the filler rod 4 corresponding embedding epimere section of ladders 1 on hypomere section of ladder 1 inside wall, thereby constitute be slidingly connected (seeing the column cross section shown in the accompanying drawing 12 for details).
Shown in accompanying drawing 1 and accompanying drawing 2, more convenient in order to use, in the integral telescopic ladder 29, in the crosspiece 3 of the one section section of ladder 1 in top latch gear 6 is not set, and latch gear 6 and insert 15 are not set in the crosspiece 3 of two sections section of ladders 3 of bottommost yet, all be provided with latch gear 6 and insert 15 on other each section of ladders 1 of middle part.Like this under rounding state, the elastic positioning machine structure that other should be set on two sections section of ladders 1 of bottommost positions, for example: crosspieces 3 stretch out an elasticity spacer 24 to another person's crosspiece, this elasticity spacer 24 is provided with a projection 25, respective protrusions 25 is provided with a location hole clipping 2 on another person's the crosspiece relatively, when both were rounding state, the projection 25 on the elasticity spacer 24 embedded location in the standing block hole 26.
Shown in accompanying drawing 1 and accompanying drawing 2, this extension ladder rear portion each side be provided with an auxiliary extension spring 28, this auxiliary extension spring 28 is connected the section of ladder 1 at top and from the bottom between third from the bottom section the section of ladder 1.And the rotating shaft by the left and right directions setting on one section section of ladder 1 of top is hinged on the installing rack 27, when using with this, installing rack can be vertically mounted on the sidewall of loft mouth, and as shown in Figure 1 deployed condition during use directly extends ground from loft; Can upwards promote this extension ladder with push rod when not using, i.e. past next the interlock gathering successively of extension ladder from the top, till the elastic positioning machine structure between two sections section of ladders of bottommost is also locked, whole extension ladder was positioned at rounding state as shown in Figure 2 and can launch voluntarily this moment, turn over extension ladder on then can be again, extension ladder is ploughed under in the loft mouth, shut this extension ladder of loft door and promptly be hidden.
Shown in accompanying drawing 11, on the first section section of ladder 1 in top latch gear 6 is not set, tease and ridicule knothole 31 and on its column 2, offered one, be fixed with limited block 32 on the adjustment hole 31 therein, the column of second section section of ladder 1 is slidingly connected on first section section of ladder 1, and the extremity piece on column 2 tops of second section section of ladder 1 cooperates with limited block 32, passes through to regulate the position of limited block 32 on first section section of ladder 1 with this, can regulate the entire length after extension ladder 29 launches by the needs of use occasion floor height.
The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model spirit essence change or modify, and all should be encompassed within the protection domain of the present utility model.
Claims (4)
1, a kind of locking device of extension ladder, comprise latch gear [6], described latch gear [6] comprises shank [7], locating hole [8] and acts on spring [9] on the shank [7], described shank [7] is located in the crosspiece [3] of section of ladder towards vertical column expanding with its head, the column [2] of adjacent section of ladder [1] is offered above-mentioned locating hole [8] corresponding to shank [7] head under deployed condition with on the lap of this section of ladder [1] column [2], described spring [9] active force forces shank [7] head to embed with locating hole [8] to cooperate; It is characterized in that: be interval with a release inclined-plane [10] and inclined-plane [11], a location on the described shank [7]; The crosspiece [3] of an adjacent last section of ladder or next section of ladder is gone up corresponding to release inclined-plane [10] and inclined-plane, location [11] and respectively is provided with an embedding auxiliary section [12,13]; Described release inclined-plane [10] and inclined-plane, location [11] all tilt forward and back on the flexible direction of shank [7], release inclined-plane [10] is towards shank [7] head side and oblique to being provided with corresponding adjacent section of ladder [1] inclination that embeds auxiliary section [12], and inclined-plane, location [11] and release inclined-plane [10] are towards antithesis; When an adjacent last section of ladder [1] or next section of ladder [1] draw in when this section of ladder [1] is gone up, on it one embedding auxiliary section [12] offsets with release inclined-plane [10] and cooperates, promoting to contract in the shank [7] breaks away from locating hole [8], and another embedding auxiliary section [13] on it contacts with inclined-plane, location [11] and cooperates the location simultaneously.
2, the locking device of a kind of extension ladder according to claim 1 is characterized in that: described release inclined-plane [10] and inclined-plane, location [11] are provided with on shank [7] stage casing face-to-face, go up at shank [7] with this and form an embedding room [14]; Corresponding to embedding room [14], convex with an insert [15] on an adjacent last section of ladder or next the section of ladder crosspiece [3], on this insert [15], be provided with described two and embed auxiliary section [12,13], this two embeds auxiliary section [12,13] and is the contact inclined-plane, and they are with corresponding release inclined-plane [10] and locate inclined-plane [11] complementation.
3, the locking device of a kind of extension ladder according to claim 1, it is characterized in that: described shank [7] comprises a housing [16], accommodate a swing component [17] on housing [16] back segment, the front end face of this swing component [17] is described release inclined-plane [10], the left and right sides of swing component [17] front end is provided with projection [18], and the rear portion of swing component [17] is erected at through pivot [19] between the left and right sides sidewall of housing [16], and an extension [20] is extended in bending on the rearward end of swing component [17]; Described spring [9] is a stage clip, and it is pressed on the extension [20] from the rear end, and promotion shank [7] protracts and makes the swing of swing component [17] front end; Corresponding to offering a dead slot mouth [21] on position crosspiece [3] surface after the swing of swing component [17] front end, corresponding described projection [18] is provided with locating slot [22] on dead slot mouth [21] edge; Swing component [17] is under swing state, and its front end embeds in the dead slot mouth [21], and front end upper protruding block [18] embeds with locating slot [22] and cooperates.
4, the locking device of a kind of extension ladder according to claim 1 is characterized in that: described shank [7] head is provided with a roller [23].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620126632 CN200971751Y (en) | 2006-10-30 | 2006-10-30 | Locking device for telescopic lalder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620126632 CN200971751Y (en) | 2006-10-30 | 2006-10-30 | Locking device for telescopic lalder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200971751Y true CN200971751Y (en) | 2007-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620126632 Expired - Fee Related CN200971751Y (en) | 2006-10-30 | 2006-10-30 | Locking device for telescopic lalder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200971751Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010017684A1 (en) * | 2008-08-14 | 2010-02-18 | Wang Wanxing | Extending ladder |
| CN101434332B (en) * | 2008-11-13 | 2011-02-02 | 北京通旭机电设备有限公司 | Locating, self-locking and unlocking method and apparatus for storehouse storage and transportation platform |
| CN102003136A (en) * | 2010-10-28 | 2011-04-06 | 王万兴 | Locking structure for telescopic ladder |
| CN102536105A (en) * | 2011-12-31 | 2012-07-04 | 长沙中联消防机械有限公司 | Engineering vehicle and scarcement locking system thereof |
| WO2013035094A1 (en) | 2011-09-11 | 2013-03-14 | Omri Gilad | Telescopic ladder and locking mechanism thereof |
| WO2016079516A1 (en) * | 2014-11-18 | 2016-05-26 | Michael Beard | Extendable access device |
| CN112796650A (en) * | 2019-11-14 | 2021-05-14 | 开平创誉棚架设备有限公司 | Pedal with extension ladder device |
-
2006
- 2006-10-30 CN CN 200620126632 patent/CN200971751Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010017684A1 (en) * | 2008-08-14 | 2010-02-18 | Wang Wanxing | Extending ladder |
| CN101434332B (en) * | 2008-11-13 | 2011-02-02 | 北京通旭机电设备有限公司 | Locating, self-locking and unlocking method and apparatus for storehouse storage and transportation platform |
| CN102003136A (en) * | 2010-10-28 | 2011-04-06 | 王万兴 | Locking structure for telescopic ladder |
| WO2012055159A1 (en) * | 2010-10-28 | 2012-05-03 | 宁波兴富工具有限公司 | Locking structure for extensionableladder |
| CN102003136B (en) * | 2010-10-28 | 2012-09-12 | 王万兴 | Locking structure for telescopic ladder |
| WO2013035094A1 (en) | 2011-09-11 | 2013-03-14 | Omri Gilad | Telescopic ladder and locking mechanism thereof |
| US9151114B2 (en) | 2011-09-11 | 2015-10-06 | Gilad Omri | Telescopic ladder and locking mechanism thereof |
| CN102536105A (en) * | 2011-12-31 | 2012-07-04 | 长沙中联消防机械有限公司 | Engineering vehicle and scarcement locking system thereof |
| WO2016079516A1 (en) * | 2014-11-18 | 2016-05-26 | Michael Beard | Extendable access device |
| US10208539B2 (en) | 2014-11-18 | 2019-02-19 | Michael Beard | Extendable access device |
| CN112796650A (en) * | 2019-11-14 | 2021-05-14 | 开平创誉棚架设备有限公司 | Pedal with extension ladder device |
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