CN206273998U - Extension ladder - Google Patents

Abstract

The utility model discloses a kind of extension ladder, section of ladder including multiple sockets, the section of ladder includes two parallel poles, crosspiece is fixedly connected between the pole, the pole upper end sets adapter sleeve, and the adapter sleeve includes being fixedly connected on the contiguous block of the crosspiece end；Slided in the contiguous block and horizontal extension is set in the latch of the adjacent pole side wall of higher level, the latch connects controlling switch；Hypomere side-walls set the first jack passed through for latch described in adjacent subordinate in the pole；The pole bottom side of the wall sets amortisseur bar, and the outer peripheral face of the amortisseur bar is inconsistent with the inwall of pole described in adjacent subordinate.The utility model is provided with amortisseur bar in the pole side wall of extension ladder, and the decrease speed of pole is slow down significantly, provides the sufficient reaction time to operator to hide, decrease the shock dynamics of adjacent pole, the service life of extension ladder, and simple structure are extended, maintenance cost is low.

Description

Extension ladder

Technical field

The utility model is related to ascending tool technical field, and specifically, the utility model is related to extension ladder.

Background technology

There is a kind of extension ladder on the market at present, can be stretched and be shortened as fishing bar, be convenient for carrying and deposit, can put In the closet of family, in study, under bed or in the boot of automobile.

The U of patent No. CN 202866628 disclose a kind of extension ladder, including more piece is socketed telescopic pole and passes through Adapter sleeve is connected to the crosspiece between parallel pole, is fixed by latch between neighbouring two poles, and latch level is slided It is arranged on adapter sleeve, solution lock-switch is connected with latch, solution lock-switch is located at adapter sleeve lower section, and adapter sleeve lower section sets sheath The side wrap of lock-switch will be solved, so as to prevent people's maloperation from causing danger, and the utility model can realize that tactile supporting unlocks, and make Extension ladder shrinks convenient.

But in contraction process when the locking of the adjacent pole of lock-switch control latch releasing is solved, higher level's pole is due to certainly Body Action of Gravity Field makes its decrease speed quickly, easily injures human body by a crashing object, or neighbouring crosspiece fast approaching and operator does not have More time responses, it is easy to crush human body, although the two adjacent sections on the extension ladder protected in above-mentioned patent document Finger gap is formed between crosspiece, however it remains very big potential safety hazard.Therefore, some extension ladders are provided with pole bottom Hermetic seal buffer structure reduces the decrease speed of section of ladder, but this mode needs good sealing structure, service life It is relatively low, the decrease speed of section of ladder cannot be slowed down if not being fully sealed, and also this air-tight structure is starting rank Still quickly, only speed can just start to slow down section section of ladder decrease speed after higher level's section of ladder declines certain distance, and security is not Height, complex structure, maintenance cost is higher.

Utility model content

Technical problem underlying to be solved in the utility model is to provide a kind of extension ladder, and the utility model is in extension ladder Pole side wall is provided with amortisseur bar, and the decrease speed of pole is slow down significantly, and it is next to provide the sufficient reaction time to operator Hide, decrease the shock dynamics of adjacent pole, extend the service life of extension ladder, and simple structure, maintenance cost It is low.

The utility model solve the technical scheme that is used of above-mentioned technical problem for：Extension ladder, including multiple ladders being socketed Section, the section of ladder includes two parallel poles, and crosspiece is fixedly connected between the pole, and the pole upper end sets adapter sleeve, The adapter sleeve includes being fixedly connected on the contiguous block of the crosspiece end；Slided in the contiguous block and horizontal extension is set in upper The latch of the adjacent pole side wall of level, the latch connects controlling switch；Hypomere side-walls are set for adjacent in the pole The first jack that latch described in subordinate is passed through；The pole bottom side of the wall sets amortisseur bar, outer peripheral face and the phase of the amortisseur bar The inwall of pole is inconsistent described in adjacent subordinate.

By above-mentioned technical proposal, the outer peripheral face of amortisseur bar is inconsistent with the inwall of adjacent subordinate's pole, declines in pole During, upward frictional force is generated between the inwall of amortisseur bar and subordinate's pole, the part gravity for declining pole is counteracted, So that the decrease speed of pole slows down significantly, the reaction time for providing abundance to user is hidden, and is substantially increased and is stretched Contract the safety in utilization of ladder, while reduce the impact dynamics of adjacent pole, improves the service life of pole, and amortisseur bar can be with It is silica gel strip or rubber strip, wear-resisting, service life is high；Compared with hermetic seal slow descending device, the setting of amortisseur bar, structure letter Single, easily manufactured, maintenance cost is low, and service life is high；Adapter sleeve is set between crosspiece and pole, crosspiece is improve with pole Connective stability, it is easy to maintenance；Set in contiguous block and stretched in the latch of adjacent segments bar side wall, latch connects controlling switch, when When controlling switch control latch passes through the side wall of higher level's adjacent pole, adjacent pole is fixed as elongation state by latch, is stretched Ladder can be used normally；When controlling switch control latch withdraw contiguous block in, the adjacent pole of higher level decline under gravity from And extension ladder is shunk, it is simple to operate.

Further it is optimized for, the pole lower end is fixedly connected with end cap, and the end cap sidewalls set annular groove, described The amortisseur bar is set on annular groove, the outer wall of the pole where the outer peripheral face protrusion of the amortisseur bar.

By above-mentioned technical proposal, amortisseur bar is arranged in annular groove, when amortisseur bar moves up and down, annular groove Madial wall serves position-limiting action to amortisseur bar so that amortisseur bar is not susceptible to movement under the frictional force with pole, improves Amortisseur bar and the connective stability and service life of pole, so as to improve the slow drop effect of section of ladder, further increase and stretch Contract terraced retractable safety；The outer wall of the extension bar where the outer peripheral face protrusion of amortisseur bar, in amortisseur bar and subordinate's pole When wall is contradicted, the outer wall of pole where amortisseur bar is contactless with the inwall of subordinate's pole, reduces the friction between adjacent pole Loss, also reduces extension ladder adjacent pole friction and noise for producing in contraction process.

Further it is optimized for, the amortisseur bar is the annular ring of non-closed, the length of the amortisseur bar is less than the annular The girth of groove and more than 3/4ths of the annular groove girth.

By above-mentioned technical proposal, amortisseur bar is the annular ring of non-closed, during dismounting amortisseur bar, can be supportted annular ring Open, in then snapping in annular groove, or taken out from annular groove, convenient disassembly is conveniently replaceable maintenance；The length of amortisseur bar is less than ring The girth of connected in star and more than 3/4ths of annular groove girth, ensure while easy disassembly amortisseur bar amortisseur bar with The contact area of pole inwall, so as to ensure the good slow drop effect of pole.

Further it is optimized for, the lower end surface edge of the end cap sets projection, the projection and pole side wall The surface transition of connection is inclined-plane.

Exist by above-mentioned technical proposal, the setting of projection so that after extension ladder shrinks, between adjacent pole bottom certain Space, contact area is few, it is not easy to block, or when there is adhesivity material between adjacent pole bottom, being difficult will be adjacent Two pole conglutinates, during using extension ladder, easily can extend extension ladder, easy to use；Projection is connected with pole side wall Surface transition be inclined-plane, when pole decline during, bottom is that the latch for shrinking back contiguous block pushes back company by the inclined-plane of projection Block is connect so that pole smoothly declines, so that convenient shrink extension ladder.

Further it is optimized for, elastic component is set between the latch and the contiguous block；Under nature, the elastic component Contradicting the latch makes the latch be in overhanging trend.

By above-mentioned technical proposal, elastic component can be spring, and under nature, elastic component conflict latch is at outer The trend stretched, when people use extension ladder, pole is extended, and when pole is elongated to certain altitude, latch is in elastic component Through the side wall of adjacent pole under effect, so as to the position of pole be fixed, latch is controlled by controlling switch without people It is overhanging, the operating procedure of people is saved, it is user-friendly.

Further it is optimized for, the controlling switch includes slide switch and the solution lock-switch in the contiguous block；Institute Slide switch is stated located at the crosspiece wall outer surface and the latch can be promoted to reciprocatingly slide in the horizontal direction；The unblock is opened The second buckle, rotating shaft and the press section for including being wholely set, second buckle and the latch phase clamping are closed, the rotating shaft connects It is connected on the contiguous block and can be around own axis；The upper surface of the contiguous block sets and can extend into adjacent higher level's connection Block inside simultaneously contradicts the shake-up block that the corresponding press section rotates.

By above-mentioned technical proposal, slide switch is arranged on crosspiece wall outer surface and latch horizontal direction can be promoted reciprocal Motion, when people do not use extension ladder, promotes slide switch that latch is recovered in contiguous block, releases the lock of adjacent pole It is fixed, extension ladder is stretched；Solution lock-switch includes the second buckle, rotating shaft and press section, when adjacent rungs are moved closer to until touching Block contradicts press section makes solution lock-switch axis of rotation around the shaft, so that the second buckle drives latch to be recovered in contiguous block, solves Except the locking of adjacent pole, higher level's pole declines automatically under gravity, and the function that realization is unlocked step by step simplifies extension ladder Operating procedure during contraction, provides a great convenience to user.

Further it is optimized for, in section of ladder described in the first order, the solution lock-switch is located at the second level to the slide switch And in the section of ladder more than second level.

By above-mentioned technical proposal, slide switch is arranged in first order section of ladder, solution lock-switch be arranged on the second level and In the section of ladder more than second level, the locking between the slide switch unblock first order and second level section of ladder is promoted, make second level section of ladder Slowly decline, until the solution lock-switch for touching block conflict second level section of ladder of first order section of ladder, so that second level section of ladder is slotting Pin is recovered in contiguous block, the locking of the unblock second level and third level section of ladder, the like, can unlock step by step automatically, make to stretch Terraced automatic contraction, simple structure is easy to operate.

Further it is optimized for, positioning sleeve is set in the contiguous block, the positioning sleeve inside sets mounting groove, the elasticity Part and described latch one end are placed in the mounting groove.

By above-mentioned technical proposal, elastic component is preferably spring, and one end of latch is together placed in mounting groove, in latch In reciprocatory movement, positioning action is served to elastic component and latch, improve the connective stability of elastic component and latch.

Further it is optimized for, draw-in groove is set in the contiguous block, the positioning sleeve outside is set and the draw-in groove clamping Locating clamp plate.

By above-mentioned technical proposal, locating clamp plate, so as to positioning sleeve is fixed in contiguous block, is dismounted with the clamping of draw-in groove phase It is convenient, after positioning sleeve is damaged, positioning sleeve only need to be changed, maintenance cost is low.

Further it is optimized for, is fixedly connected instruction block on the latch, described two kinds of colors of instruction block surface horizontally set, Respectively locking color sets indicator hole with color, the crosspiece upper side wall is unlocked.

By above-mentioned technical proposal, when latch passes through adjacent higher level's pole side wall, locking color is just to indicator hole；When slotting When pin does not pass through adjacent higher level's pole side wall, color is unlocked just to indicator hole, so that people can be apparent that whether extension ladder is locked Fixed and unblock, improves the safety in utilization of extension ladder.

In sum, the beneficial effects of the utility model are：

(1), the side wall in pole sets amortisseur bar, and amortisseur bar is inconsistent with the inwall of adjacent subordinate's pole, realizes section The effect of the whole slow drop of bar, compared with air-tight structure, simple structure is easy to maintenance, safe.

(2), amortisseur bar is arranged in the annular groove of end cap, and non-closed, stable connection, is easy to maintenance to change.

(3), end cap bottom sets projection, and the setting of projection ramp is easy to that latch is pushed back into company during the slow drop of pole Block is connect, so that regular descent.

(4), solution lock-switch and shake-up block mating reaction, realize that the automatic unlocking of extension ladder shrinks, and are convenient for people to operation.

(5) setting of block, is indicated, is convenient for people to judge whether extension ladder is in the lock state, so as to be grasped accordingly Make, improve the safety in utilization of extension ladder.

Brief description of the drawings

Fig. 1 is the structural representation of extension ladder in embodiment；

Fig. 2 is the partial exploded view of first order section of ladder in embodiment；

Fig. 3 is the structural representation of first switch in embodiment；

Fig. 4 is the structural representation of adapter sleeve in embodiment；

Fig. 5 is the explosive view of pole bottom in embodiment；

Fig. 6 is the structural representation of second switch in embodiment；

Fig. 7 is the explosive view of instruction block and latch in embodiment；

Fig. 8 is the structural representation of positioning sleeve in embodiment.

In figure, the corresponding component names of each reference are：1st, section of ladder；2nd, pole；21st, the first jack；22nd, second insert Hole；3rd, crosspiece；31st, indicator hole；4th, adapter sleeve；41st, annular sleeve；411st, the 3rd jack；42nd, contiguous block；421st, chute；422nd, block Groove；43rd, block is touched；44th, slot；5th, positioning sleeve；51st, locating clamp plate；52nd, mounting groove；6th, latch；61st, the first breach；62nd, Two breach；7th, first switch；71st, the first buckle；72nd, operating portion；8th, second switch；81st, the second buckle；82nd, press section；83、 Rotating shaft；9th, block is indicated；91st, the 3rd buckle；92nd, index plane；921st, color is locked；922nd, color is unlocked；10th, end cap；101st, ring Connected in star；102nd, projection；103rd, inclined-plane；104th, amortisseur bar.

Specific embodiment

In order to more fully understand content of the present utility model, it is described further with reference to specific embodiments and the drawings. It should be understood that these embodiments are only used for further illustrating the utility model, rather than limit scope of the present utility model.This Outer to should be understood that after content described in the utility model has been read, person skilled in art makes to the utility model Nonessential change or adjustment, still fall within protection domain of the present utility model.

Embodiment

Extension ladder, referring to Fig. 1, including some sockets section of ladder 1, section of ladder 1 includes two parallel poles 2, the end of pole 2 Adapter sleeve 4 is fixed with, referring to Fig. 2 and Fig. 4, adapter sleeve 4 includes annular sleeve 41 and contiguous block 42, and annular sleeve 41 is set in pole 2 End, is fixed by screw through the side wall of pole 2 and annular sleeve 41；Referring to Fig. 5, hypomere side-walls open up in pole 2 One jack 21；The lower end of pole 2 is connected with end cap 10, and connected mode is the removablies, easy disassembly, end cap 10 such as mode connects for screw Side wall sets and amortisseur bar 104 is set in annular groove 101, annular groove 101, is chosen as silica gel strip or rubber strip, wear-resisting, uses Life-span is high；The outer peripheral face of amortisseur bar 104 is inconsistent with the inwall of adjacent subordinate's pole 2, and projection is set at the lower edge of end cap 10 102, projection 102 is inclined-plane 103 with the joint face transition of the side wall of pole 2；Horizontally set crosspiece 3 between pole 2, contiguous block 42 connects The end of crosspiece 3 is connect, connected mode is mode connects for screw.

Referring to Fig. 2 and Fig. 4, the inner transverse of contiguous block 42 sets in chute 421, chute 421 and is provided with latch 6, annular sleeve Side wall on 41 with respect to contiguous block 42 sets the 3rd jack 411, and second is set on the side wall on pole 2 with respect to the 3rd jack 411 Jack 22, the end of latch 6 also cross the first jack 21, the second jack 22 and the 3rd jack 411, so as to by neighbouring section Bar 2 is fixed as elongation state；Opposing sidewalls on chute 421 away from the one end of annular sleeve 41 set card in draw-in groove 422, draw-in groove 422 Be connected to positioning sleeve 5, referring to Fig. 7 and Fig. 8, on positioning sleeve 5 set locating clamp plate 51, locating clamp plate 51 insertion draw-in groove 422 in so as to Positioning sleeve 5 is fastened in chute 421；Mounting groove 52, the one end of latch 6 insertion mounting groove 52, mounting groove 52 are opened up on positioning sleeve 5 Elastic component (being not drawn into figure), preferably spring are set between bottom and the end of latch 6, and positioning sleeve 5 is played to spring and latch 6 Position-limiting action, improves the connective stability and job stability of spring and latch 6, and elastic component contradicts latch 6 produces it Overhanging trend；Under nature, when extension ladder is in elongation state, elastic component contradicts latch 6 makes it pass the first jack 21st, the second jack 22 and the 3rd jack 411 fix neighbouring pole 2.

Referring to Fig. 7, the circumferentially disposed breach 62 of first breach 61 and second of the upper side wall of latch 6, the first breach 61 sets unblock Switch, solution lock-switch includes being arranged at the first switch 7 of first order latch 6 and is arranged at the latch 6 of the second level and its above Second switch 8；Referring to Fig. 3, first switch 7 is preferably and pushes away torsion, pushes away the first buckle 71 for being set on turning round and being connected to the first breach 61 With the operating portion 72 for being slidably arranged in the lateral wall of crosspiece 3, it is set to drive latch 6 sliding in chute 421 with hand propelled operating portion 72 It is dynamic, the end of latch 6 is recovered in adapter sleeve 4 from the side wall of pole 2, realize unblock；Referring to Fig. 6, second switch 8 includes being connected to Second buckle 81 of the first breach 61 and press section 82, set rotating shaft 83,83 turns of rotating shaft between the second buckle 81 and press section 82 It is dynamic to be connected on adapter sleeve 4；Referring to Fig. 2 and Fig. 4, the upper surface of adapter sleeve 4 is set touches block 43, and lower surface relevant position sets and opens Groove 44, the positive cross-notching 44 in press section 82, when adjacent rungs 3 are contacted, subordinate touches block 43 and stretches into the inside conflict of higher level's fluting 44 Higher level's second switch 8 83 is rotated around the shaft, drives the corresponding end of higher level's latch 6 to shrink in adapter sleeve 4, realizes unblock.

Set referring to Fig. 7, on the second breach 62 and indicate block 9, indicate block 9 to include the buckle 91 of index plane 92 and the 3rd, the 3rd Buckle 91 is connected on the second breach 62；Referring to Fig. 1, the side wall of crosspiece 3 sets indicator hole 31, the horizontally set of index plane 92 locking face Color 921 and unblock color 922, locking color 921 are preferably green, and unblock color 922 is preferably red, and unblock color 922 is leaned on Nearly pole 2；When neighbouring pole 2 is fixed as stretching by latch 6 through the first jack 21, the second jack 22 and the 3rd jack 411 Long status, when extension ladder can be used normally, green is just to indicator hole 31；When latch 6 does not pass through the first jack of higher level's pole 2 When 21, i.e., neighbouring pole 2 is not fixed, just to indicator hole 31, extension ladder can not be used red, so that people can be correct Judge whether extension ladder can use, and then carry out corresponding operating, improve the safety in utilization of extension ladder.

When not using extension ladder, the operating portion 72 of torsion is pushed away with the inside horizontal cross of hand, latch 6 is recovered to adapter sleeve 4 In, due to Action of Gravity Field, the section of ladder 1 of the second level slowly declines in the presence of amortisseur bar 104, until the shake-up block 43 of the first order The press section 82 of conflict second switch 8 in the fluting 44 of the second level is stretched into, the latch 6 of the second level is recovered in adapter sleeve 4, solved The elongation stationary state of the pole pole 2 of second level pole 2 and the 3rd is locked, third level section of ladder 1 slowly declines, by that analogy, you can real The slow drop function of touching to automatic unlocking and safety of existing extension ladder, it is easy to use, it is safe, while also extending extension ladder Service life.

As described above, just can preferably realize the utility model.

Claims (10)

1. the section of ladder (1) of extension ladder, including multiple sockets, the section of ladder (1) includes two parallel poles (2), the pole (2) Between be fixedly connected crosspiece (3), it is characterised in that pole (2) upper end sets adapter sleeve (4), and the adapter sleeve (4) includes It is fixedly connected on the contiguous block (42) of the crosspiece (3) end；Slided in the contiguous block (42) and horizontal extension is set in higher level The latch (6) of the adjacent pole (2) side wall, the latch (6) connects controlling switch；Hypomere side-walls in the pole (2) The first jack (21) passed through for latch (6) described in adjacent subordinate is set；Pole (2) bottom side of the wall sets amortisseur bar (104), the outer peripheral face of the amortisseur bar (104) is inconsistent with the inwall of pole (2) described in adjacent subordinate.

2. extension ladder according to claim 1, it is characterised in that pole (2) lower end is fixedly connected with end cap (10), End cap (10) side wall sets annular groove (101), and the amortisseur bar (104) is set on the annular groove (101), described The outer wall of the pole (2) where the outer peripheral face protrusion of amortisseur bar (104).

3. extension ladder according to claim 2, it is characterised in that the amortisseur bar (104) is the annular ring of non-closed, institute The length for stating amortisseur bar (104) is less than the girth of the annular groove (101) and more than the four of the annular groove (101) girth / tri-.

4. extension ladder according to claim 2, it is characterised in that the lower end surface edge of the end cap (10) sets convex Block (102), the surface transition that the projection (102) is connected with the pole (2) side wall is inclined-plane (103).

5. extension ladder according to claim 1, it is characterised in that set between the latch (6) and the contiguous block (42) Put elastic component；Under nature, the elastic component contradicts the latch (6) makes the latch (6) in overhanging trend.

6. extension ladder according to claim 5, it is characterised in that the controlling switch includes slide switch (7) and is located at Solution lock-switch (8) in the contiguous block (42)；The slide switch (7) is located at the crosspiece (3) wall outer surface and can push away The latch (6) is moved to reciprocatingly slide in the horizontal direction；It is described solution lock-switch (8) including be wholely set the second buckle (81), turn Axle (83) and press section (82), second buckle (81) and the latch (6) phase clamping, the rotating shaft (83) are connected to described On contiguous block (42) and can be around own axis；The upper surface of the contiguous block (42) sets and can extend into adjacent higher level's connection Block (42) is internal and contradicts the shake-up block (43) that the corresponding press section (82) rotates.

7. extension ladder according to claim 6, it is characterised in that the slide switch (7) is located at section of ladder described in the first order (1) in, in the section of ladder (1) of solution lock-switch (8) more than the second level and the second level.

8. extension ladder according to claim 5, it is characterised in that positioning sleeve (5) is set in the contiguous block (42), it is described Mounting groove (52) is set inside positioning sleeve (5), and the elastic component and the latch (6) one end are placed in the mounting groove (52).

9. extension ladder according to claim 8, it is characterised in that draw-in groove (422) is set in the contiguous block (42), it is described Positioning sleeve (5) outside sets the locating clamp plate (51) with the draw-in groove (422) clamping.

10. extension ladder according to claim 1, it is characterised in that instruction block (9), institute are fixedly connected on the latch (6) Instruction block (9) surface two kinds of colors of horizontally set are stated, color (921) and unblock color (922), the crosspiece is respectively locked (3) upper side wall sets indicator hole (31).