CN2183438Y - Two-purpose telescopic ladder - Google Patents

Abstract

The utility model discloses a two-purpose telescopic ladder, which can be used as a wall leaning ladder, and can also be erected in virtue of a building roof or an iron wire or a rope which is transversely drawn to replace V-shaped ladders. The two-purpose telescopic ladder has convenient and safe use, few manufacture materials and simple structure. The two-purpose telescopic ladder has only one telescopic vertical rod; the front side of the vertical rod is assembled with a fixed transverse rod member and a dismountable transverse rod member; the upper end has a supporting cross arm for leaning wall and an upper supporting device which can recur to the building roof to erect the ladder; the lower part has ladder feet which can change the expanded span.

Description

Two-purpose telescopic ladder

The utility model relates to a kind of flexible ladder of erectting rod member that has.

Ladder at present commonly used is broadly divided into by wall ladder and double ladder two classes, and they are respectively applied for different occasions, uses the former during reliable thing (as wall etc.), otherwise uses the latter.Because ceiling fan, ceiling light etc. are installed on popularizing of the top electrical equipment room in, and the interior decoration heat of rising in recent years, make that the use of and double ladder terraced by wall is all increased, especially the latter is more obvious.So satisfy the needs of use, this two classes ladder all must be equipped with.Obviously do both uneconomically like this, a certain size parking space is provided again for this reason, the best approach that addresses this problem is that this two classes ladder is integrated, and makes it to have concurrently two kinds of functions.In the prior art of this technical field, patent document (CN 85 2 03550 U) discloses a kind of many with single longitudinal member wire ladder, and it both can be used as by the wall ladder and has used, and can be used as double ladder again.But double ladder is by component such as special hinge, bolts, and two wall ladder assemblings of leaning on that shed by wall supporting cross-arm are formed, and it is convenient inadequately to use.In addition, above-mentioned double ladder is not because the upper end has the strong point, and ground has injustice just can rock slightly during use.And these ladders when using four strong point spacings bigger, need occupy bigger ground, be subject in the use hinder.

Problem in view of above-mentioned prior art existence, the purpose of this utility model provides a kind of having concurrently by wall ladder and double ladder function, easy to use, safe, in light weight, material-saving, and neither can rock and need not occupy a kind of telescopic ladder of face significantly when using as double ladder.

The utility model be achieved in that one by on assemble the transverse bar member of some on the telescopic upright rod member that constitutes of vertical rod and following vertical rod, wherein descend the transverse bar member on the vertical rod to fix, the transverse bar member on the last vertical rod is dismountable.In addition, pulley, the stay cord that is used for the flexible operation of ladder also is housed erectting on the rod member, and can makes the last vertical rod of rising be fixed in the rising positioner at a certain height place.Also has a supporting cross-arm that is used for by wall on last vertical rod top.The ladder of Gou Chenging can only be done to use by the wall ladder like this, in order to make it to replace double ladder indoor, in last vertical rod front upper support arrangement on has been installed, it is connected together strut and bracer, bracer and needling by two orthogonal rotating shafts and constitutes, strut tilts to be fixed on the vertical rod front, when ladder does not have wall or other and erects thing and can rely on, can go up vertical rod by raising and make support arrangement tightly support the roof.At this moment vertical face is shaped as the bracer of rectangular (or square) shape perpendicular to the roof, under pressure and when the little direction in angle of slope begins to topple at ladder, its meeting run-off the straight is in the rotation on roof, make the length that it occupies in vertical, increase to diagonal angle length by original rectangular long edge lengths, but because the restriction on roof, make the growth of this length not reach diagonal angle length and just be forced to end, thereby make ladder obtain a component opposite and unlikely fall down with toppling direction.At supporting cross-arm two ends a hook is arranged respectively, erect thing again can not be the time, can on iron wire that draws in advance or rope, ladder be erected these two hook hooks by means of the roof when erecting of ladder can not rely on.

Ladder with above-mentioned technical characterictic can also be installed a foot of ladder by rotating shaft in the bottom of following vertical rod, it mainly is made up of foot of ladder bar and a pull bar of the foot of ladder palm two lower ends, whole foot of ladder can be done the opening and closing campaign with respect to following vertical rod, can support in the ladder back side when opening.Also have two collapsible pull bars in addition, its two ends are respectively with the foot of ladder bar with can link to each other along the collar that vertical rod down moves, thus mobile change foot of ladder that can be by the collar open span.When indoor nothing setting thing can rely on, can allow foot of ladder be in maximum earlier opens span and makes ladder erect (at this moment can't go up the people), utilize as stated above and go up the upright firm ladder of support arrangement, the span of opening of dwindling foot of ladder then by the mobile collar makes foot of ladder can tightly support ground.At this moment if ladder to little direction topple over towards the inclination angle, then last support arrangement stop this topple in, foot of ladder equally also can play the effect that prevention is toppled over.Because by design of the present utility model, after ladder stands well, the upper support point that last support arrangement constitutes on roof upright projection earthward, necessarily drop between two the lower support points and other two lower support points of foot of ladder formation, therefore when the ladder direction little (promptly increasing the direction of foot of ladder pressure) when toppling over towards the inclination angle, the supporting role meeting of foot of ladder makes support arrangement produce a bigger upwards displacement component thereupon, obviously, this displacement will be subjected to the restriction on roof, thereby toppling over of ladder stoped.This shows, load onto this foot of ladder after, make above-mentioned ladder when erecting by means of the roof, increase one deck safety guarantee again.For four lower support points making ladder on ground also face in intimate contact at ordinary times not, can also make in two foot of ladder bars telescopic.The ladder decapacitation that has foot of ladder replaces outside the double ladder, also can be used as by the wall ladder to use, at this moment as long as foot of ladder is closed.In addition, can support bigger weight, can also be fixed on the same end of all these transverse bar member on the same reinforcing rib in order to make down the transverse bar member on the vertical rod.

From the above mentioned as seen, the utility model has concurrently by wall ladder and two kinds of functions of double ladder, therefore can save material greatly, dwindle parking space, be convenient to carrying, and the mutual conversion of two kinds of functions is extremely easy, and structure is also simple.In addition, when the replacement double ladder uses,, therefore can not rock, and upward vertical rod also can supply hand steered or be hanging safety belt, thereby make it more safer than general double ladder because the upper end also has fulcrum.

Below in conjunction with the embodiment shown in the accompanying drawing 1 to 7 the utility model is described in detail.

Fig. 1, the dual-purpose telescopic ladder that erects by means of the roof

Fig. 2 erects stretching and the positioner sectional view of rod member

Fig. 3, detachable transverse bar member

Fig. 4, last support arrangement sectional view

Fig. 5, the using method of supporting cross-arm two ends hook

Fig. 6, the connected mode of collapsible pull bar and the foot of ladder bar and the collar

Fig. 7, scalable foot of ladder bar

Fig. 1 is a kind of ladder in the utility model, mainly make by aluminium alloy extrusions, wherein go up vertical rod ［ 14 ］ and following vertical rod ［ 19 ］ and make by the tubulose section bar, the former has protruding straight flange in positive both sides, and it inserts the latter and promptly constitutes telescopic upright rod member of the present utility model in managing.Be fixed with several transverse bar member ［ 23 ］ in following vertical rod front, wherein nethermost one at the following not end place of vertical rod down, respectively there are two the lower support points of a hard rubber ［ 24 ］ as ladder at its place, soffit two ends.The same end of these transverse bar member all is fixed on the same aluminium alloys reinforcing rib ［ 20 ］.Two pulleys ［ 17 ］ also are equipped with at positive place at following vertical rod, the rope ［ 18 ］ of one root system in last vertical rod lower end rides over and constitutes a closed becket bridle (as shown in Figure 2) on these two pulleys, spur one section that this root rope is exposed down, vertical rod is raise.A rising positioner is arranged, be subjected to the backstay ［ 5 ］ of torsion spring ［ 28 ］ pressure effect and backstay pull handle ［ 16 ］ to constitute (as shown in Figure 2) by one on location sawtooth ［ 15 ］ on the last vertical rod projection straight flange and the following vertical rod.Because the crown of location sawtooth is down, so backstay can not stop vertical rod to rise, but can stop it to descend, make vertical rod be fixed on need the height place.When needing vertical rod to descend, as long as pulling backstay pull handle makes backstay pull out from the positions saw between cog and gets final product.At the top end of last vertical rod, be equipped with one and be used for one hook ［ 9 ］ also respectively being arranged by its two ends of supporting cross-arm ［ 8 ］ of wall.Last vertical rod is furnished with several detachable transverse bar member (as shown in Figure 3), and it is on a cross bar, and above vertical rod frontal width is a spacing, fixes two blocks ［ 31 ］ of being furnished with latch ［ 29 ］ and pin hole ［ 30 ］ symmetrically and constitutes.In addition, onesize pin hole ［ 6 ］ is arranged on last vertical rod two sides.Transverse bar member under being fixed on the vertical rod can not satisfy when climbing desired height, and this detachable transverse bar member can be installed on the vertical rod on having raise.Method is extremely easy, only needs two blocks are stuck in the vertical rod both sides, and both pin hole is alignd insert latch again and get final product, and only need take out latch during dismounting.On last vertical rod top support arrangement on has been installed also, it constitutes (referring to Fig. 4, Fig. 5) by strut ［ 13 ］, pulling-on piece ［ 7 ］, bracer ［ 11 ］, hinge ［ 34 ］, catch ［ 32 ］, sheet spring ［ 35 ］, bolt ［ 33 ］, needling ［ 12 ］ and soft rubber piece ［ 10 ］.Bracer wherein is because of being subjected to the effect of sheet spring ［ 35 ］, and it is parallel with strut to do its outside of time spent in no external force.Needling can be swung around bolt; when utilizing last support arrangement to erect ladder; the soft rubber at needling two ends contacts with the roof and constitutes two upper support points of ladder; the effect of soft rubber is to increase frictional force; protect simultaneously the roof to avoid damage again, whole needling can stop ladder to rotate around erectting rod member.A foot of ladder is arranged at the bottom of following vertical rod, and it is made of two foot of ladder bars ［ 26 ］, a pull bar ［ 4 ］ and two foot of ladder palms.The foot of ladder palm is made up of connector ［ 3 ］, commutation piece ［ 2 ］ and hard rubber ［ 1 ］, and it is connected in foot of ladder bar lower end by connector.The upper end of two foot of ladder bars is installed in down on the vertical rod by a bolt ［ 21 ］, and whole foot of ladder can be done the opening and closing campaign around this bolt.The collar ［ 22 ］ (referring to Fig. 6) that can move along vertical rod is down arranged in the below of bolt ［ 21 ］, and it is made by enough thick iron wire and aluminium sheet.Other has two also to be to be linked to each other with the foot of ladder bar by collapsible pull bar ［ 25 ］ one ends that the crude iron silk is made, and the other end links to each other with the collar.Therefore can change the span of opening of foot of ladder by the mobile collar.At the following vertical rod back side one curved tabs spring ［ 27 ］ (as shown in Figure 2) is arranged, it can stop the collar to glide, and makes foot of ladder be in the maximum span of opening.The collar is being mentioned it movably in the highest point, foot of ladder can be closed (promptly folded lean against next root transverse bar member on).This moment, the two foot of ladders palms stretched out from next root transverse bar member below, and when ladder need lean on wall to use, they just constituted two lower supports and hold a support on the ground, will lean against on the wall by means of the supporting cross-arm on last vertical rod top in addition.When ladder need utilize the roof to erect, at first foot of ladder will be flared to maximum span (collar at this moment drops on the curved tabs spring) stands on the ground ladder, again last vertical rod is raise, soft rubber on needling is touching the roof, promote vertical rod lower end down towards increasing the vertical rod inclination direction then, motionless until pushing away.Step on the collar downwards with pin at last, make it to cross the curved tabs spring,, consequently cause foot of ladder to open span and reduce and foot of ladder is slapped tightly to support in ground until not moving down again.The collar of this moment can not move up voluntarily because of the effect of frictional force, and this just makes the foot of ladder palm can tightly support ground all the time in the whole process that ladder uses.For needling, because it can be swung, so whether parallel with ground regardless of the roof, the soft rubber that is positioned at its two ends all can closely contact the roof.Bracer is because of pressurized, and must be folded to the supporting cross-arm this moment.When ladder is toppled over because of the direction little towards the inclination angle under pressure, the effect of frictional force between soft rubber and the roof and sheet spring, the line that makes bracer around two fulcrums of two soft rubbers formation is rotated, thereby cause the seamed edge relative (promptly being equipped with the seamed edge of hinge) to apply a component opposite and make ladder can avoid toppling over toppling direction to strut with this line.In addition, the supporting role of foot of ladder at this moment also can cause whole ladder to rotate around the rotating shaft of two foot of ladder palms, makes needling produce bigger upwards displacement component, but because the restriction on roof, this displacement can not take place, thereby also can stop ladder to be toppled over.When the setting of ladder can not rely on the setting thing, in the time of again can not be, can earlier foot of ladder be closed by means of the roof, the hook that will support the cross-arm two ends again on iron wire that draws in advance or rope ［ 36 ］, can make ladder erect by method hook shown in Figure 5 equally.

Another kind of ladder in the utility model is on the basis of above-mentioned ladder structure, makes scalable foot of ladder bar with one in the foot of ladder bar, and its structure as shown in Figure 7.［ 41 ］ for last foot of ladder bar, ［ 40 ］ are that fastening bolt, ［ 39 ］ are that rail is stitched for fastening bolt moves in fastening nut, ［ 38 ］, ［ 37 ］ are the descending stair foot lever, the lower end of descending stair foot lever is equipped with a foot of ladder palm.When foot of ladder opens when standing on uneven ground, can all can touch landing ground by flexible four the lower support points of ladder that make of descending stair foot lever, tighten fastening nut then, in the whole process that ladder uses, all tightly support ground to guarantee four lower support points all the time.

Claims (4)

1, a kind of dual-purpose telescopic ladder has the rod member of setting, transverse bar member and pulley, stay cord, rising positioner, it is characterized in that:

(1.1) has only a scalable vertical setting rod member that constitutes by last vertical rod and following vertical rod;

(1.2) go up vertical rod

(1.2.1) top has one to lean on wall supporting cross-arm, and respectively there is a hook at its two ends,

(1.2.2) there is one to go up support arrangement, strut is linked to each other with needling with bracer, bracer and constitutes by two orthogonal rotating shafts,

(1.2.3) several pin holes that are used to install detachable transverse bar member are arranged on the two sides, corresponding detachable transverse bar member is on a cross bar, and above vertical rod frontal width is a spacing, fix two symmetrically and be furnished with the block of latch and pin hole and constitute,

(1.3) have only on the following vertical rod fixing transverse bar member arranged,

(1.4) the rising positioner is made of the backstay and the backstay pull handle of a spring-loaded on location sawtooth on the last vertical rod and the following vertical rod.

2,, it is characterized in that vertical rod down by the described ladder of claim 1

(2.1) by rotating shaft foot of ladder is housed, it is equipped with the foot of ladder palm by two lower ends foot of ladder bar constitutes by a pull bar is continuous,

(2.2) a removable collar is arranged, it links to each other with two foot of ladder bars by two collapsible pull bars.

3, by the described ladder of claim 2, it is characterized in that in the said foot of ladder bar is the scalable foot of ladder bar that is made of last foot of ladder bar and descending stair foot lever.

4, by any described ladder in the claim 1 to 3, the same end of all transverse bar member under it is characterized in that on the vertical rod all is fixed on the same strengthening rib strip.

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