CN200975207Y

CN200975207Y - Single ladder and herringbone double-duty stairs

Info

Publication number: CN200975207Y
Application number: CNU2006200666193U
Authority: CN
Inventors: 苏正平
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-26
Filing date: 2006-10-26
Publication date: 2007-11-14
Anticipated expiration: 2016-10-26
Also published as: WO2008049337A1

Abstract

The utility mode discloses a single-section ladder and herringbone ladder composite, comprising two folding plates connecting two sections of single ladder beds. Seeing from the side, one side of either folding plate is connected by a hinge, the other side is provided with a through hole, and the two through holes overlap with each other when the folding plate is folded; a location hole is also provided on one of the folding plates; and the center of the location hole, the hinge axis and the center of the through hole on the same folding plate form an obtuse triangle, and an obtuse angle forms at the hinge axis. The utility model also comprises a locating plate provided with two locating pins. The interval between the two locating pins is equal to the interval between the locating hole and the through hole on the same folding plate. Through different matching manners of the locating plate and the two folding plates, a stable triangle structure is formed to fix the utility model at herringbone-ladder working position; through the stable structure achieved by two-point fixation of the two folding plates, the utility model is fixed at the single-ladder working position. The utility model is simple in structure and easy to operate.

Description

A kind of single ladder, the dual-purpose ladder of herringbone

Technical field:

The utility model relates to a kind of single ladder, the dual-purpose ladder of herringbone.

Background technology:

Existing single ladder, the dual-purpose ladder of herringbone are to utilize the fold mechanism that is arranged on long terraced middle part will grow ladder two parts folding and the feasible long ladder in location to have certain angle, can be used as double ladder and use.Existing single ladder, the dual-purpose ladder of herringbone its rigidity when open mode have directionality difference, as shown in Figure 1, when dual-purpose ladder uses as long ladder, against on the supporter time, if lean on direction and to grow terraced folding direction consistent, then the people climbs up by holding on on it, long ladder is imposed downward active force, supporter imposes the reaction force that deviates from the supporter direction to long ladder, and this reaction force will be grown terraced tensioning, makes that long ladder can be unexpected not folding; If the long ladder of upset, as shown in Figure 2: this moment, the feasible long ladder of reaction force of supporter had the trend that is folded, and existing foldable structure often can only satisfy the user demand in one direction of long ladder, makes that the reverse rigidity of existing long ladder is not enough, the people steps on thereon, has an accident unavoidably.If dual-purpose ladder uses existing duplex to make the position foldable structure, must especially note the dependence direction of long ladder, careless slightly, just may damage accident.

The utility model content:

When the purpose of this utility model provides a kind of single ladder, the dual-purpose ladder of herringbone as long ladder or double ladder use, all has higher steadiness.

Single ladder described in the utility model, the dual-purpose ladder of herringbone comprise two folded sheets that are connected with two sections list ladders, see that from the side two folded sheets, one side hinge connects, and opposite side respectively has a through hole, and when folded sheet closed up, two through hole overlapped; Also have a locating hole on a folded sheet therein, the center of circle of the through hole on the center of circle of this locating hole and hinge axis and the same folded sheet constitutes an obtuse triangle, and wherein the hinge axis place is the obtuse angle; Also have a location-plate, two alignment pins are arranged on the location-plate, the distance of two alignment pins equals the distance of the through hole on described locating hole and the same folded sheet.

As shown in Figure 3: when two sections single ladders 10 need be fixed on certain angle, a pin 7 on the location-plate 6 is inserted in the locating hole 5, in another pin 8 through holes 3 that are inserted on another folded sheet, at this moment, two folded

sheets

1,2 and location-plate 6 form a stable triangle ABC structure, guarantee the stability of two single terraced positions, adjust the position of locating hole 5 and the distance of

alignment pin

7,8, can adjust the open angle of single ladder; As shown in Figure 4: when two sections single ladders 10 are opened, two folded

sheets

1,2 close up, its through

hole

3,4 overlaps, a pin 7 on the location-plate is inserted in the locating hole 5, another pin 8 is inserted in the two through

hole

3,4 of coincidence, and two folded sheets and location-plate form a stable triangle ABC ' structure, guarantees the stability of two single terraced positions, no matter external force is from any direction at this moment, all folding danger of zero accident.As shown in Figure 5: when two single ladders 10 need fully folding so that when storing, for reducing volume, can two single ladders are folding, an alignment pin 7 on the location-plate 6 is inserted in the locating hole 5, another alignment pin 8 is inserted in the through hole 4 on the same folded sheet and gets final product.The utility model is simple in structure, owing to adopted triangular structure spacing, its reliable operation can adapt to high-stability requirement under the different operating state.

Description of drawings:

Fig. 1 is single ladder, the force analysis figure of the dual-purpose ladder of double ladder under single terraced user mode;

Fig. 2 is that the user mode after the dual-purpose ladder upset of existing monomer, herringbone is accepted analysis chart;

Fig. 3-Fig. 5 is the operating position schematic diagram of the diverse location of the utility model list ladder, the dual-purpose ladder of herringbone.

Fig. 6-Fig. 7 is A-A of the present utility model and B-B sectional view

The specific embodiment:

As shown in Figure 3, the utlity model has and two sections single ladder 10 folded sheets that are connected 1,2, see that from the side two folded sheets, 1,2 one side hinges connect, opposite side has through

hole

3,4, and through

hole

3,4 overlaps (as shown in Figure 4) when folded sheet closes up; On a folded sheet 2 locating hole 5 is set therein, the center of circle of the through hole 4 on the center of circle of this locating hole 5 and hinge axis and the same folded sheet 2 constitutes an obtuse triangle ABC, and wherein the hinge axis place is the obtuse angle; Also have a location-plate 6, have distance between two alignment pins, 7,8, two alignment pins to equal the distance of through hole 2 and locating hole 4 on the location-plate 6.

Cannelure 7 is arranged in the locating hole 5, on the relevant position of alignment pin 7 correspondingly spring catch 9 is arranged, when alignment pin 7 inserts in the locating hole 5, spring catch 12 ejects, and is stuck in the cannelure 11, can limit the freely-movable of folded sheet, make folded sheet be difficult for deviating from, improve safety.

Two folded sheets have and the vertical joint face 9 of single terraced 10 bearing of trends, when folded sheet closes up, and the contact of two joint faces, when further improving the utility model and closing up, the steadiness when promptly two sections single ladders launch to become long ladder.

Comfortable in order to use, also can folded sheet or with the corresponding step of folded sheet on hinged pedal, be used as when using for double ladder, pedal can cover the double ladder top, makes the top smooth, tramples comfortable.

Claims

1. a single ladder, the dual-purpose ladder of herringbone, comprise two folded sheets (1), (2) that are connected with two sections single ladders (10), it is characterized in that: see from the side, two folded sheets (1), (2) one side hinges connect, opposite side respectively has a through hole (3), (4), when folded sheet (1), (2) when closing up, two through hole (3), (4) overlap; A folded sheet (2) is gone up and is also had a locating hole (5) therein, and the center of circle of the through hole (4) on the center of circle of this locating hole (5) and hinge axis and the same folded sheet constitutes an obtuse triangle, and wherein the hinge axis place is the obtuse angle; Also have a location-plate (6), two alignment pins (7), (8) are arranged on the location-plate (6), the distance of two alignment pins (7), (8) equals the distance of the through hole (4) on described locating hole (5) and the same folded sheet.

2. single ladder according to claim 1, the dual-purpose ladder of herringbone is characterized in that: cannelure (11) is arranged in the locating hole (5), spring catch (12) is arranged on the relevant position of alignment pin correspondingly (7).

3. single ladder according to claim 1, the dual-purpose ladder of herringbone is characterized in that: two folded sheets have and the vertical joint face (9) of single ladder (10) bearing of trend.

4. single ladder according to claim 1, the dual-purpose ladder of herringbone is characterized in that: on the folded sheet or with the corresponding step of folded sheet on hinged pedal.