CN105863489A - Grooved string type ladder - Google Patents

Abstract

The invention discloses a grooved string type ladder and belongs to the field of furniture and appliances. The grooved string type ladder comprises two ladder strings and two transverse braces, and each ladder string has an I-shaped cross section, in other words, vertical groove openings are formed in the front and back wall surfaces of the ladder strings. Transverse ripples are formed on the outer groove walls of the groove openings, and the two transverse braces are fixedly arranged between the two ladder strings and nearby the upper ends and the lower ends of the ladder strings respectively. Two foot boards in bilateral symmetry are arranged on the two ladder strings respectively through the groove openings, each foot board comprises a clamping board and a foot opening under the clamping board, a clamping claw is arranged at one end of each clamping board, an o-shaped elastic ring is embedded and clamped into each clamping claw through a vertical opening therein and is in elastic tightening contact with the inner and outer wall surfaces of the groove opening on the corresponding ladder string, and each clamping claw fits the groove opening of the corresponding ladder string. The grooved string type ladder has the advantage that a user is prevented from tumbling easily due to instability by putting two feet into the foot openings in the foot boards when ascending and descending the ladder, and is applicable to a ladder without a folding function.

Description

Ledge ladder

Technical field

The present invention is relevant with furniture apparatus, specifically refers to a kind of ledge ladder for climbing to a higher point.

Background technology

Ladder is that one uses apparatus of climbing to a higher point widely, the stull that a direct rod shape thing being commonly called as ladder side typically respectively erect by better simply a kind of ladder by both sides and Duo Gen is horizontally placed between side forms, during use, both feet are pedaled to climb step by step in the stull of low high distribution and are ascended a height or lower low, and sole when contacting stull it sometimes appear that astasia skids the dangerous situation fallen, particularly when being in the higher part position of ladder, such danger is the most fearful, needs to eliminate and improves.

Summary of the invention

The purpose of the present invention is to provide the new technical scheme ledge ladder of a kind of ladder, and it can solve aforesaid problem.

The content of technical solution of the present invention is as follows: it comprises two ladder sides, two stulls, its cross section of described ladder side is all to be machined with vertical notch on wall before and after I-shaped i.e. ladder side, being machined with horizontal ripple on the cell wall being in outside on notch, between two ladder sides, fixing device near ladder side upper end, office and each stull of ladder side lower end；Two ladder sides of office left and right sides all pass through notch is symmetrical installs a pedal, pedal comprises a pin mouth under its outer end arranges the clamp of claw and clamp, pedal passes through claw together with the notch arrangement in ladder side, claw matches with the notch in ladder side and the upper-lower height of claw is not less than 2 times of notch left and right width dimensions, claw an o shape bullet circle also by vertical openings inlay card thereon, and o shape bullet circle contacts with the stretching of the notch inside and outside wall surface elastic in ladder side.

The invention has the beneficial effects as follows: in the pin mouth that both feet can be packed on pedal, carry out upper and lower ladder, the dangerous situation that ascending stair shakiness is easily fallen will not occur again.

Accompanying drawing illustrates:

Fig. 1 is front view and the partial enlarged view of the design ladder.

Fig. 2 is the front view of pedal.

Fig. 3 is that pedal is combined with the inlay card of ladder side and decomposes details enlarged drawing (under vertical view state, i.e. cross-sectional state).

In each figure, 1 is ladder side, and 2 is clamp, and 3 is pin mouth, and 4 is stull, and 5 is notch, and 6 is claw, and 7 is ripple, and 8 is bullet circle, and 9 is pedal.

Detailed description of the invention:

Explanation for example to the design below in conjunction with the accompanying drawings.

As shown in Figure 1, Figure 2, Figure 3 shows, the ladder of the design comprises 1, two stulls 4 of two ladder sides of straight rod-shaped, described its cross section of ladder side 1 is all to be machined with vertical notch 5 on wall before and after I-shaped i.e. ladder side, being machined with horizontal ripple 7 on the cell wall being in outside on notch 5, between two ladder sides 1, fixing device near ladder side upper end, office and each stull 4 of ladder side lower end；nullTwo ladder sides of office left and right sides all pass through the claw 6 phase inlay card on notch 5 and pedal is symmetrical installs a pedal 9，Pedal 9 comprises a pin mouth 3 under its one end arranges the clamp 2 of claw 6 and clamp，Claw 6 matches with the notch 5 in ladder side and the upper-lower height of claw is not less than 2 times of notch left and right width dimensions，Thereby can make to obtain between notch with both claws good inlay card to be combined effect thus relatively reliable bear gravity，Claw an o shape bullet circle also by the vertical openings inlay card of processing on it，O shape bullet circle is the conglobate flexible steel ring of a kind of closing，It can be a few ring around forming can also be the structure of an of completely closed circle sample，It is such as Fig. 2、The vertical device of shape shown in Fig. 3 contacts in vertical openings and with the stretching of the notch inside and outside wall surface elastic in ladder side on claw，Thereby stretching effect of bullet circle，Pedal will not be able to not moved by stretching card in the case of not by external force in ladder side，As shown in left side zoomed-in view in Fig. 1.nullWhen concrete climbing uses，Both feet put in the pin mouth 3 on pedal 9，Hand steered both sides ladder side and deliberately by tape move pedal upwards inwardly on lift interior force of receiving and follow and move in notch 5 parallel sliding of ladder side，Pin has the power of upwards inwardly both direction in the process，Yes overcomes gravity for the effect purpose of power upwards、Pedal is moved on resistance，Inward force is then in order to avoid being prevented from upper shifting by touching the outside wall surface (wavy surface) of notch outside claw during upper shifting，It is seen that this drive of pin can overcome the gravity falling pedal itself zoomed-in view on the left of Fig. 1、Stretching frictional force between bullet circle and notch wall、Also card will be stoped with on pin pedal not to be moved smoothly by the ripple outside wall surface of notch，Arrive after top dead center sole to stopped and continue up、Inside force and transfer to and be only downwardly applied to pedal force (i.e. scaler's self gravitation)，As Fig. 1 can find under gravity in the zoomed-in view of right side，The claw of clamp 2 outer end can be stuck inside and outside the notch of ladder side 1 on wall because of the imbalance of pedal force，The ripple 7 with surface relief feature arranged in outside wall surface can make it stop will not to glide by reliable bracketing firmly pedal 9，So both feet are alternately climbed and are risen mobile just can arrival at desired height；When needing to move down, then move pedal by tape inwardly to receive in pressure down downwards and apply also to be that the power of both direction is followed notch 5 parallel sliding of ladder side and moved down, identical with front described principle due to the force of pin be the most inwardly both direction rather than simple downwards, this balances sliding force the most to a great extent, the wavy surface making ladder side notch is difficult to it is produced interception, the movement such that it is able to glide smoothly, i.e. stop inside force to sole after bottom dead center and only retain the pedal force (i.e. scaler's self gravitation) that is downwardly applied to, now equally stop moving down of pedal because there will be the other effect of card between wall inside and outside the effect claw of this out-of-balance force and notch, so both feet of shape alternately move down by pin i.e. can complete to decline and move.Owing to carrying out upper and lower ladder in both feet can be packed into the pin mouth on pedal, the dangerous situation that ascending stair shakiness is easily fallen will not occur again.

Claims (1)

1. a ledge ladder, it comprises two ladder sides, two stulls, it is characterized in that its cross section of described ladder side is all to be machined with vertical notch on wall before and after I-shaped i.e. ladder side, being machined with horizontal ripple on the cell wall being in outside on notch, between two ladder sides, fixing device near ladder side upper end, office and each stull of ladder side lower end；Two ladder sides of office left and right sides all pass through notch is symmetrical installs a pedal, pedal comprises a pin mouth under its outer end arranges the clamp of claw and clamp, pedal passes through claw together with the notch arrangement in ladder side, claw matches with the notch in ladder side and the upper-lower height of claw is not less than 2 times of notch left and right width dimensions, claw an o shape bullet circle also by vertical openings inlay card thereon, and o shape bullet circle contacts with the stretching of the notch inside and outside wall surface elastic in ladder side.