CN200975208Y

CN200975208Y - Herringbone telescopic ladder

Info

Publication number: CN200975208Y
Application number: CN 200620066847
Authority: CN
Inventors: 苏正平
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-31
Filing date: 2006-10-31
Publication date: 2007-11-14
Anticipated expiration: 2016-10-31

Abstract

The utility model discloses a herringbone telescopic ladder, comprising two telescopic single-section ladders. The upper part of the master ladder and the top of the auxiliary ladder are connected by pin joint, and the hinged part can be dismantled; a locating board connected to the other single-section ladder is hinged on the master ladder or the auxiliary ladder. The utility model can fully take use of the adjustable strength and height of the telescopic single-section ladder to achieve a herringbone telescopic ladder meeting the requirements of various heights.

Description

A kind of herringbone extension ladder

Technical field:

The utility model relates to the herringbone extension ladder of a kind of engineering or storage use.

Background technology:

Ladder is divided into single ladder and double ladder, all is building operations and freight house instrument commonly used, and during by the sidewall operation, single ladder is easy to use, and when no sidewall can lean on, double ladder was easy to use.People usually need to buy simultaneously two kinds of ladders could satisfy instructions for use.Recently the someone has developed single ladder has been folded the dual-purpose ladder that uses as double ladder, but for the consideration to single terraced rigidity, the length of this ladder can not be oversize, and height was just more restricted when it used as double ladder.In addition, also has a kind of extension ladder on the market, its ladder is the sleeve of socket layer by layer, horizontal step hollow also is fixed on each layer sleeve, step end fixing spring pin, spring catch inserts on vertical ladder in the pin-and-hole of corresponding this layer sleeve and inner layer sleeve, spring catch is pulled out pin-and-hole, inner layer sleeve can move up and down, and the trip spring pin continues mobile inner layer sleeve, when the pin-and-hole of inner layer sleeve upper end or lower end is come the spring catch place, spring catch ejects, and snaps in the pin-and-hole on the inner layer sleeve, and this grade step promptly is stretched or compressed.The extension ladder adjustable height is widely used in the occasion of various requirement for height, but does not also have height adjustable double ladder to sell on the market.

The utility model content:

The purpose of this utility model provides a kind of double ladder, can make full use of the intensity and the adjustable for height advantage of telescopic type list ladder, obtains being applicable to the herringbone extension ladder of various requirement for height.

Double ladder described in the utility model comprises two telescopic type list ladders, and main terraced top is hinged with auxilliary terraced top, and hinge point is detachable, below hinge point, is hinged with the location-plate that can be connected with another single ladder on main ladder or the auxilliary ladder.

Because two telescopic type list ladders of the present utility model are hinged, adjust location-plate, the single ladder of itself and another is connected, then two single ladders form a firm triangular structure with location-plate, and two single ladders are fixed to a firm double ladder; Because the hinge point of two telescopic type list ladders of the present utility model is detachable, when needs used single ladder, double ladder taken apart became two single ladders, promptly can be used as single ladder and uses.Described location-plate can have with another single ladder on the corresponding locating slot of alignment pin, or other general location structures.The utility model can make full use of the intensity and the adjustable for height advantage of telescopic type list ladder, is applicable to various requirement for height workplace.

Description of drawings:

Fig. 1 is a schematic diagram of the present utility model;

Fig. 2 is the user mode schematic diagram of existing double ladder;

Fig. 3 is the sectional view of step of the present utility model.

The specific embodiment:

As shown in Figure 1, main terraced 1 top is hinged with auxilliary terraced 2 tops, and hinge point 3 is detachable, below hinge point 3, is hinged with the location-plate 4 that can be connected with another single ladder on main ladder or the auxilliary ladder.Detachably hinged mode is a prior art, can be on main body and auxilliary body corresponding axis hole to be set, and mobilizable independent bearing pin inserts in the axis hole; Also can adopt piecing devices easy and simple to handle on sale on the market.

Existing double ladder master ladder, auxilliary terraced equal in length, as shown in Figure 2, in order to guarantee safety of workers, the workman can only trample in the position of distance ladder top 3-4 level, and health is rested on the step of top, keeps one's balance, if continue to climb to a higher point, then lean on insufficiently, safety does not have and ensures.This structure has also been wasted top step length.As shown in Figure 1, in order to make full use of the step of extension ladder, hinge point of the present utility model is positioned at main terraced top, and more than hinge point, main ladder also has 1-3 level step.The workman can trample in the position of distance hinge point 1-2 level, and health is rested on main terraced top and the extension, leans on more abundant, more can guarantee safety, and the length of auxilliary ladder can be fully used, and compared with prior art, the double ladder of identical working depth can be saved the length of 1-2 level.

In order to increase the contact area on foot of ladder and ground, improve the safety of double ladder, at the foot of ladder articulated stand of double ladder.Support can be fixed by spring, and its fixation principle and bike rack are similar; Support also can be fixed or fix with the mode of fixed head mentioned above by pin.

Described fixed head can be the rod-like element that is overlapped on vertical ladder of main body and auxilliary body; Also be overlapped on the plate-like piece on two main ladders and the auxilliary body step, the workman can trample on this plate-like piece, tramples more comfortable.

As shown in Figure 3, flexible single ladder 8 is sleeves 5 of socket layer by layer, horizontal step 6 hollows also are fixed on each layer sleeve 5, step 6 end fixing spring pins 7, in the pin-and-hole 9 of corresponding this layer sleeve 5 and inner layer sleeve 51, the spring catch 7 in the step 6 is connected with the knob 10 on the step 6 on the spring catch 7 insertion ladders 8.Turning knob 10, spring catch 7 is drawn out pin-and-hole 9, inner layer sleeve 51 can move up and down, and unclamps knob 10, spring catch 7 corresponding unclamping, but because the inner layer sleeve relevant position does not have pin-and-hole, inner layer sleeve can continue to move, and when other pin-and-holes of inner layer sleeve were come the spring catch place, spring catch ejected, snap in the pin-and-hole on the inner layer sleeve 51, this grade step promptly is fixed on and stretches or compression position.The knob 10 that the utility model is provided with control spring pin 7 makes the more convenient operation of extension ladder.

Fixing torsion spring 12 on knob 10, torsion spring 12 is to the direction application of force of holddown spring pin.Because increased the torsion spring to the holddown spring pin direction application of force, under the situation of no enough external force effects, knob can not deviate from outside the pin-and-hole because of unintentional rotation makes spring catch, increased this practical safety.

For the length difference of free adjustment main body, make that double ladder can be on uneven ground, as placing on the step, at the interfix pin-and-hole that has on corresponding two inner layer sleeves of one or more steps of main ladder or auxilliary ladder more than a pair of with auxilliary ladder.Described interfix pin-and-hole is meant and is positioned at the sleeve middle part, rather than the pin-and-hole at two ends.In the time of in the spring catch in the step snaps in the interfix pin-and-hole, can in the altitude range of a step, regulate main body and auxilliary terraced difference in height, so that adapt to various ground conditions better.

Claims

1. herringbone extension ladder, it is characterized in that: comprise two telescopic type list ladders, main ladder (1) top is hinged with auxilliary ladder (2) top, and hinge point (3) is detachable, below hinge point, be hinged with the location-plate (4) that can be connected on main ladder or the auxilliary ladder with another single ladder.

2. herringbone extension ladder according to claim 1 is characterized in that: hinge point is positioned at main terraced top, and more than hinge point, main ladder also has 1-3 level step.

3. herringbone extension ladder according to claim 1 is characterized in that: at the foot of ladder articulated stand of double ladder.

4. herringbone extension ladder according to claim 1, it is characterized in that: the ladder of main ladder and auxilliary ladder is the sleeve of socket layer by layer, horizontal step hollow also is fixed on each layer sleeve, step end fixing spring pin, spring catch inserts in the pin-and-hole of corresponding inner layer sleeve on vertical ladder, and the spring catch in its step is connected with the knob on the step.

5. herringbone extension ladder according to claim 3 is characterized in that: fixing torsion spring on knob, torsion spring is to the direction application of force of holddown spring pin.

6. according to claim 4 or 5 described herringbone extension ladders, it is characterized in that: at the interfix pin-and-hole that has on corresponding two inner layer sleeves of the step of main ladder or auxilliary ladder more than a pair of.

7. herringbone extension ladder according to claim 1 is characterized in that: described fixed head is the rod-like element that is overlapped on vertical ladder of main body and auxilliary body; Or being overlapped on two main ladders reaches the plate-like piece of assisting on the body step.