CN2474711Y

CN2474711Y - Multifunction safety ladder

Info

Publication number: CN2474711Y
Application number: CN 01235053
Authority: CN
Inventors: 戴中华
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-09
Filing date: 2001-05-09
Publication date: 2002-01-30
Anticipated expiration: 2011-05-09

Abstract

The utility model discloses a multiple function safety ladder which can be widely applicable to every walk of life. The main technical character of the utility model is that when the utility model is used as an extension ladder, the ladder top is arranged with a holding device which can be nipped between a bar or two intersecting walls without side-to-side slide and declination and is safe, and does not need support with hand, when the utility model is used as a herringbone ladder, the ladder top has a pulley block which can suspend heavy up and down, thereby specially being applicable to the uses of architecture and fruit farm, and the lower portion of the female ladder has an adjustable feet which can stably arrange the ladder on the different height ground.

Description

Multifunction safety ladder

The utility model relates to a kind of ladder of the usefulness of ascending a height, and particularly relates to a kind of emergency staircase of anti-shake.

In the use field of current ladder, there are some shortcomings, lean against electric pole, in the time of on bar class such as trunk or two metopes that intersect, easily produce and roll the phenomenon of inclination as common ladder; Ground relief can make ladder produce equally; Remove big heavier thing ladder inconvenience etc. up and down.

Patent 96237633.7 (the publication number CN2261504Y of country origin People's Republic of China (PRC) date of declaration on September 3rd, 1997) proposes to adapt to telescopic auxiliary pin the uneven situation (its auxiliary leg structure is seen Figure 11) on ground, but its auxiliary pin is not good enough with the securing member effect that female ladder connects, only banking can make telescopic leg with a latch, with an iron plate sealing of mother's cleat stanchion can be addressed this problem, but can bring difficulty selection and processing.

The purpose of the utility model is to overcome the above-mentioned shortcoming of common ladder, and a kind of a kind of Multifunction safety ladder that can use safely in multiple scope is provided.

The utility model employing one son ladder 2 moves in the groove of female ladder 1 and forms extension ladder.Extension ladder adopt be individually fixed in female ladder 1 topmost crosspiece 5 and son ladder 2 bottom two of crosspiece 4 stretch and fall pulley 8 and rope 10 (removable) is stretched to sub-ladder the height that needs, automatically be stuck in by movable chuck 7 on the crosspiece of female ladder 1, thereby the position of fixing female ladder and son ladder (this part can with reference to existing extension ladder on the market).The son ladder topmost side of crosspiece 6 has a clamping device, and crosspiece 6 adopts bolt 12 to connect with the hinge 15 of clamping device; Each is associated with a live splint 16 with common pin 17 on each hinge.Female terraced top and sub terraced bottom connect with lock pin nail 9 when making double ladder; Have between female ladder and the ladder and can be used to the fixedly height and the angle pull bar 11 that scatters of double ladder; Ladder pushes up to have and can be used for hanging thing pulley yoke 13 and hanging thing pulley 14 of lift heavy thing; There are two independently telescopic leg 3 that are used to adapt to the Different Ground situation of activity the lower end of female ladder 1.

Characteristics of the present utility model are on the crosspiece on the terraced top of son when making extension ladder a clamping device that is used for fixing on the metopes that bar class or two intersects to be arranged, and there is a pair of telescopic leg female terraced lower end; Female terraced top has one to be used for lift heavy thing pulley up and down when doing the double ladder use, and a telescopic pull bar is arranged between sub-ladder and female ladder.

The utlity model has following advantage:

1. there is clamping device on the ladder top, and ladder is not rolled, and does not tilt.

2, the pull bar adjustable length of double ladder, thereby can change double ladder angle and the height.

3, the thing pulley is hung in the double ladder upper end, makes things convenient for about the lift heavy thing.

4, female ladder adopts the lock pin nail to be connected with telescopic leg, and is stable, convenient.

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is the whole front view when doing the extension ladder use;

Fig. 2 is the vertical view of clamping device;

Fig. 3 is the front view and the left view of female ladder and telescopic leg connection status;

Fig. 4 is the movable chuck working state figure;

Fig. 5 is the phantom of female ladder and the connecting structure of son ladder when making double ladder and using;

Fig. 6 is for hanging thing pulley structure figure;

Fig. 7 reaches up and down at injustice ground user mode figure for double ladder lift heavy thing;

Fig. 8 is at vertical ladder level land user mode figure not;

Fig. 9 is the pull bar working state figure;

Vertical view when Figure 10 leans against on bar or the corner for clamping device;

Figure 11 is the auxiliary pin of patent 96237633 and the connection status figure of female ladder.

The each several part title is as follows:

1, female ladder 2, son ladder 3, telescopic leg 4, sub-ladder be crosspiece 5 female ladder the top crosspieces 6 bottom, and the son ladder is crosspiece 7 topmost, movable chuck 8, lifting pulley 9, lock pin nail 10, rope 11, pull bar 12, bolt 13, hang thing pulley yoke 14, hang thing pulley 15, hinge 16, live splint 17, common pin

The utility model employing one son ladder 2 moves in the groove of female ladder 1 and forms extension ladder.Extension ladder length is adjustable, employing be individually fixed in female ladder 1 topmost crosspiece 5 and son ladder 2 bottom two of crosspiece 4 stretch and fall pulley 8 and rope 10 (removable) is stretched to sub-ladder the height that needs, automatically be stuck in by movable chuck 7 on the crosspiece of female ladder 1, thus the position (see figure 1) of fixing female ladder and son ladder (this part can with reference to existing extension ladder on the market).

There is a clamping device side of the top crosspiece 6 of son ladder 2 of the present utility model, and crosspiece 6 connects with the hinge 15 usefulness bolts 12 of clamping device.When ladder needed on bar such as electric pole, tree or two metopes that intersect operation, clamping device can rely on bar or wall that the reaction force of ladder is clamped bar or wall automatically, thereby reaches stable, the purpose (see figure 10) of anti-shake.Fix two hinges 15 in crosspiece 6 sides with bolt 12, respectively be associated with a live splint 16 with common pin 17 on each hinge.Hinge 15 requires to connect closelyr, should be pulled by the people, again can be not loosening easily voluntarily, need the time spent, the moving part of hinge is pulled vertical substantially with gripped object, the time spent is not pulled plane parallel with the ladder place with the moving part of hinge, does not take up space; Live splint 16 is a circular arc, and its diameter is according to a certain ratio design (d is that minimum is born radius) of the smallest shaft of the pressure that can bear ladder and people in the practical application, and scope that can clamping is (d ,+∞) (see figure 2).

The utility model also can be done double ladder and use, and on the basis of extension ladder, it is contour with female ladder upper end to move son ladder 2 to its lower end, scatter and insert lock pin follow closely double ladder.Female terraced top and sub terraced bottom connect (see figure 5) with lock pin nail 9, fix the height of double ladder and the angle of scattering with pull bar 11.Lock pin nail 9 is formed by two sections, wherein one section relatively another section rotate, when two sections on same straight line the time,, pull down a section of stretching out then and can pin (see figure 5) its insertion pin-and-hole.Pull bar 11 is formed by two sections, and the A section is fixed on female terraced 1 cleat stanchion side by common pin, is drilled with a series of hole on it; Respectively there is a hole at B section two ends, can connect the cleat stanchion (see figure 9) of A section pull bar and son ladder 2 respectively with lock pin nail 9.Bucket or basket Left on/Left off can be specially adapted to fruit picking, (see figure 7)s such as building decoration by hanging thing pulley 14 (see figure 6)s and rope.Also can on pull bar, put a plate, instruments such as bucket or basket are put thereon, solve weight ladder and the inconvenient problem of instrument placement up and down of removing.

There are two independently telescopic leg 3 of activity the lower end of female ladder 1 of the present utility model, regulates its length and can make ladder stand on step, slope, broken terrain (see figure 8).At the problem in No. 96237633.7 patents, adopt lock pin nail 9 to connect between telescopic leg 3 of the present utility model and the female ladder 1, being drilled with N radius on telescopic leg 3 is that R is at a distance of being the hole of D, also respectively boring two sizes on two cleat stanchion sides of female ladder 1 is R, at a distance of the hole of nd (1≤n≤N-1), with the hole alignment on female ladder 1 and the telescopic leg 3, the insertion lock pin is followed closely 9 and is also pinned the relative position that can fix mother terraced 1 and telescopic leg 3, has solved the problem (see figure 3) that the telescopic leg of mentioning in the background technology will produce inclination.

Claims

1. Multifunction safety ladder, comprise female ladder, the son ladder, it is characterized in that there is the clamping device that can lean against on bar or the wall on sub terraced top, female terraced bottom is connected with the telescopic leg 3 that can regulate two terraced leg relative altitudes with lock pin nail 9, on the crosspiece 5 on female ladder ladder top, be provided with and hang thing pulley 14 than the Left on/Left off of weight body, between female ladder and sub-cleat stanchion, be provided with telescopic pull bar 11.

2. Multifunction safety ladder according to claim 1 is characterized in that clamping device comprises two live splints 16.

3. Multifunction safety ladder according to claim 1 is characterized in that having between female ladder and the telescopic leg lock pin nail 9 to be connected.

4. Multifunction safety ladder according to claim 1 is characterized in that pull bar 11 forms by two sections.