CN107859473A

CN107859473A - Folding ladder

Info

Publication number: CN107859473A
Application number: CN201711301414.8A
Authority: CN
Inventors: 陈星宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-12-10
Filing date: 2017-12-10
Publication date: 2018-03-30

Abstract

The present invention relates to a kind of ladder, specifically a kind of folding ladder, including interspersed structure and some folding units；Interspersed structure is made up of some bars and some drawstrings, is connected with each other between bar by drawstring；Fold unit be made up of 2 standpipes and some cross bars, it is two neighboring folding unit be hinged in 2 riser ends, jointed shaft be located at standpipe outside and it is parallel with cross bar, riser end has the breach of depression in jointed shaft side；Interspersed structure is interspersed in the standpipe of some folding units being hinged.The folding ladder, which may act as vertical ladder, to be used as double ladder, simple in construction, reasonable stress, for ease of maintenaince.Present invention uses some identicals to fold unit and some identical bars, is easy to repacking to increase and reduce the joint number of folding ladder.

Description

Folding ladder

Technical field

The present invention relates to a kind of ladder, specifically a kind of folding ladder.

Background technology

Ladder is the common tool in people's production, life, but the natural length of ladder determines that its is inconvenient to carry, transport Inconvenience, leave unused and be also required to take larger space when depositing.

In order to solve the above problems, there are a variety of extension ladders in the market, such as：

A kind of extension ladder of the disclosure of the invention of application number 201610011668.5 is nested more successively along its length in extension ladder Individual structure is identical, the terraced unit of size gradation, and in any two neighboring terraced unit, the terraced leg of upper ladder is socketed in the ladder of lower ladder It is separably attached by structure identical locking system after in leg；Locking system includes lock pin, locking spring, lock pin Set, shift knob, switch spring and switch enclosure, the both ends of locking spring respectively with two locking pin connections, lock pin level according to The secondary pin-and-hole through on upper ladder and lower ladder side wall is stretched out, and switch enclosure is connected to built with switch spring, switch spring one end Lower ladder lateral wall is simultaneously enclosed on the extension of lock pin；

Although the extension ladder can be good at solving the above problems, but the transmission master of the vertical holding power of its two neighboring terraced unit Fall on the lock pin, therefore stress point is excessively concentrated, and lock pin institute stress is shearing, makes it in the stress of higher intensity Limitation be present in aspect.

The content of the invention

The defects of it is an object of the invention to overcome existing ladder or extension ladder to exist, and use can be folded by providing one kind A kind of ladder folding ladder in other words, the particularly folding ladder is simple in construction, reasonable stress, for ease of maintenaince.

The technical scheme adopted by the invention for realizing the object of the invention is：

A kind of folding ladder, including interspersed structure and some folding units, it is characterised in that：Interspersed structure is by some bars and some Drawstring is formed, and is connected with each other between bar by drawstring；Fold unit to be made up of 2 standpipes and some cross bars, two neighboring folding Unit is hinged in 2 riser ends, and jointed shaft is located at outside standpipe and parallel with cross bar, and riser end is in jointed shaft side There is the breach of depression；Interspersed structure is interspersed in the standpipe of some folding units being hinged.

When riser interiors of the bar positioned at corresponding folding unit, folding ladder can be folded, and during folding, drawstring enters In the breach for entering the depression of riser end；When bar under the pulling of drawstring through it is two neighboring folding unit hinged place, one When part is entered in the standpipe of next folding unit, bar support folding ladder is not folded over.

Preferably, the bar side is fluted, the tie point of the drawstring and upper one section bar is located in groove, and And groove certain distance is stretched into, bar groove is used to accommodate drawstring with the cavity that standpipe inwall is formed.It can make to wear using this structure Bar passes the part of corresponding standpipe and drawstring is separated without entering in next section of standpipe, so that some jointed shafts are by bar When support is not rotatable, other can not rotated within the specific limits by the jointed shaft that bar limits, i.e., this method makes the folding Folded ladder it is different fold between units it is not foldable can exist simultaneously with folding state, particularly make the folding ladder can Played an important role when being used as double ladder.

Preferably, the first segment bar of the interspersed structure is reducing bar, drawstring is connected to the smaller one end of diameter, directly The larger one end in footpath can not enter the standpipe for folding unit, spacing so as to be played to pulling scope of the interspersed structure in folding unit Effect.

It is easy to draw the handle held preferably, the drawstring of the last section bar end of the interspersed structure has.

Preferably, one end that the need of the interspersed structure penetrate the bar of adjacent cells is shunk, to reduce jam.

Preferably, the bar side of the interspersed structure is fluted；And if poling does not have a groove, bar and standpipe Cross section is the centrosymmetric image of non-circular, to limit rotation of the bar in standpipe, prevents the breach of groove and standpipe Do not correspond in position.

Preferably, the folding ladder is furnished with sleeve pipe, for preventing the support force of ladder from acting on the last section bar, together When as ladder support feet.

In summary, the advantage of the invention is that：

1. the present invention can fold, it is convenient for carrying, space-consuming when depositing of leaving unused is smaller；

2. the present invention, compared with background technology, structure more rationally, is realizing the condition of equal height and intensity in terms of stress Under, the material used is less, can save material, reduces production cost；

3. the present invention can fold at any hinge, double ladder can be used as, the different double ladder of particularly two side lengths can To be used on the ground for having the discrepancy in elevation；

4. the present invention is simple in construction, used some identicals to fold units and some identical bars, be easy to repacking increase and The joint number of folding ladder is reduced, is easy to repair, is conveniently replaceable damage part.

Brief description of the drawings

Fig. 1 is the structure chart of the folded state of the present invention.

Fig. 2 is structure chart of the present invention as double ladder state.

Fig. 3 is schematic diagram of the present invention as vertical ladder state.

Fig. 4 is detail view of the present invention as vertical ladder state.

Fig. 5 is the folding cellular construction figure of the present invention.

Fig. 6 is the interspersed structural representation of the present invention.

Fig. 7 is the detail view of the interspersed structure of the present invention.

In figure：11st, bar, 12, drawstring, 13, reducing bar, 14, handle, 15, groove, 21, breach, 22, jointed shaft, 23rd, standpipe, 24, cross bar, 31, sleeve pipe.

Embodiment

Below in conjunction with the accompanying drawings and the present invention is described in further detail by embodiment, and following examples are to this hair Bright explanation and the invention is not limited in following examples.

The present invention is by some folding units as shown in Figure 5 and two sets of interspersed structure compositions as shown in Figure 6, the folding Unit is made up of standpipe 23 and cross bar 24, is interfixed between cross bar and two standpipes, folds unit as shown in Figures 1 to 4, adjacent folding It is hinged between folded unit in its two riser end, wherein two groups of jointed shafts 22 are located at folding unit both sides respectively up and down, and Parallel with cross bar, there is the breach 21 that drawstring is accommodated during for folding at its neutral tube both ends respectively, and breach is respectively positioned at corresponding Jointed shaft side；

The interspersed structure is made up of some bars 11 and some drawstrings 12, wherein, first segment bar is reducing bar 13, its In, the end of the last section drawstring, which has, to be easy to draw the handle 14 held, as shown in Figures 6 and 7 the side of bar 12 fluted 15, groove For accommodating drawstring 12, and one end that bar is pulled is shunk, and is often connected with each other between section bar by drawstring, and drawstring and upper one The tie point of section bar is located in groove, and stretches into groove certain length；

Described two, which wear inserting structure, is respectively interposed in the both sides riser interiors for folding unit being hinged.

When the often section bar 11 is respectively positioned on 23 inside of standpipe of corresponding folding unit, every section of drawstring 12 is through respectively Between two sections standpipe, and two sections standpipe certain length is stretched into, as shown in figure 1, now, being hinged per two neighboring Folding unit can rotate and fold around its jointed shaft 22, during folding, drawstring 12 enters the breach of upper and lower two sections standpipe In 21, so as to prevent drawstring from hindering to fold.

, can be by pulling handle 14 interspersed structure is transported relative to each section of standpipe 23 when entirety of the invention is straightened Dynamic, when the less one end of the diameter of reducing bar 13 is completely into first segment riser interiors, interspersed structure is limited；Such as Fig. 4 It is shown, now, often save bar 11 and penetrate next section standpipe certain length, so that adjacent folding unit can not surround jointed shaft Rotate, i.e., ladder can not be folded under this state.

As shown in Fig. 2 when this folding ladder folds in the hinged places of certain two adjacent folding units, and other hinged places are not During folding, drawstring 12 corresponding to the hinged place stretches out being partially separated for standpipe 23 with bar 11, and now, this folding ladder can conduct Double ladder uses；And the bar end of the last section is cased with sleeve 31, sleeve avoids the last section from wearing as the support feet of ladder Bar stress.

When this folding ladder is only used as vertical ladder, and not as double ladder in use, a kind of structure of simplification can be used： To save the groove 15 of bar 11, each bar that saves is connected with drawstring in its end.

When this folding ladder need to regard double ladder simultaneously in use, being rotated to limit bar 11 in standpipe 23, make groove 15 is corresponding with breach 21 all the time, can use standpipe and bar of the cross section for the centrosymmetric image of non-circular, such as： Oval cross section.

Claims

1. a kind of folding ladder, including interspersed structure and some folding units, it is characterised in that：If interspersed structure by some bars and Dry drawing rope is formed, and is connected with each other between bar by drawstring；Fold unit to be made up of 2 standpipes and some cross bars, two neighboring folding Folded unit is hinged in 2 riser ends, and riser end has the breach of depression in jointed shaft side；If interspersed structure is interspersed in In the standpipe of the dry folding unit being hinged；When riser interiors of the bar positioned at corresponding folding unit, folding ladder can To be folded, during folding, drawstring enters in the breach of the depression of riser end；When bar passes through adjacent two under the pulling of drawstring The individual hinged place for folding unit, when being partly into the standpipe of next folding unit, bar support folding ladder is not folded over.

2. intert structure according to claim 1, it is characterised in that：The bar side is fluted, the drawstring and upper one The tie point of section bar is located in groove, and stretches into groove certain distance.

3. intert structure according to claim 1, it is characterised in that：First segment bar is reducing bar, and drawstring is connected to directly The smaller one end in footpath, the standpipe for folding unit can not be entered by being relatively large in diameter one end.

4. intert structure according to claim 1, it is characterised in that：The drawstring of the last section bar end, which has, to be easy to draw what is held Handle.

5. bar according to claim 1 or claim 2, it is characterised in that：One end that adjacent cells need to be penetrated is shunk, to reduce card Resistance.

6. bar and standpipe according to claim 1, it is characterised in that：Bar side is fluted；And if poling does not have groove, Then the cross section of bar and standpipe is the centrosymmetric image of non-circular.