CN2849111Y

CN2849111Y - Portable telescopic A-ladder

Info

Publication number: CN2849111Y
Application number: CN 200520066427
Authority: CN
Inventors: 许伟钊
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-02
Filing date: 2005-11-02
Publication date: 2006-12-20
Anticipated expiration: 2015-11-02

Abstract

The utility model is composed of a plurality of sections of telescopic vertical rods, a plurality of sections of transverse rods and a concave-convex cylindrical surface hinging rod and is characterized in that the upper end of each section of vertical rod is provided with a lining sheath which is matched with a connecting sheath and is connected with the transverse rods. Both ends in penultimate section of transverse rods are provided with a pair of wire rope stretching devices for controlling the drop of a previous section of vertical rods. Both ends in an antepenultimate section of transverse rods are provided with a pair of pressure handle stretching devices for controlling the drop of the previous section of vertical rods. A rod supporting device is arranged between two transverse rods of the antepenultimate section for fixing and locking an angle after a standing ladder is opened. A circular ring of a wire rope is pulled and a pressure handle is oppressed for downwards contracting the vertical rods and the transverse rods of the previous section. The utility model has the advantages of simple structure, convenient carryover and operation, easy collection, firm structure, etc., and is an ideal tool for photographic journalists, photographic lovers and homes.

Description

The portable stretchable double ladder

Technical field

The utility model relates to a kind of double ladder, particularly a kind of portable stretchable double ladder.

Background technology

Normally used double ladder is to be linked by four long vertical rods and many hyphen bars, long vertical rod can not be shunk, though this double ladder use occasion is more, particularly interior decoration, family is standby etc., but its distinct issues are collections the time take up space big, carrying trouble during use, especially can not carry easily, this highly carries out work and brings great inconvenience for increasing as needs such as press photographer or shutterbugs and households.

Summary of the invention

The purpose of this utility model provides a kind of easy to carry, simple in structure, easy to operate, the portable stretchable double ladder that the scope of application is wide.

The utility model is to realize by following mode: by the similar pipe of number joint sectional area is vertical rod, and the square tube identical with number joint sectional area is the main body that cross bar is formed double ladder.All there are a lining and adapter sleeve in the upper end of each pitch circle pipe vertical rod, each bar cross bar is connected with adapter sleeve in the vertical rod with an angle of 90 degrees, each joint upper pright stanchion all can be enclosed within next joint vertical rod and slide, the adapter sleeve on double ladder top also is connected with the hinge bar on a pair of concavo-convex face of cylinder except that being connected the pipe vertical rod, becomes the fulcrum that double ladder opens and closes up.The circular fixing hole that two correspondences are all arranged in every vertical rod.There is a pair of wire rope stretching device at two ends in the joint cross bar second from the bottom, bearing pin one end in this stretching device links to each other with wire rope, the other end inserts in the fixedly circular hole of vertical rod, the ring that exposes by the pulling wire rope, bearing pin is moved inward, break away from the fixing hole in the vertical rod, a last joint vertical rod on both sides is glided immediately, makes the cross bar of a joint move down contraction.There is a pair of pressure handle stretching device at two ends in the joint cross bar third from the bottom, when cross bar and vertical rod drop to pressure handle and contact with joint cross bar second from the bottom, because adding, the weight of the 3rd joint cross bar and top cross bar and vertical rod is pressed on the pressure handle, pressure handle moves up, the bearing pin that drives in the device moves in axis pin base, make bearing pin break away from the interior fixing hole of vertical rod, the vertical rod of a last joint then moves down, and drives top cross bar and shrinks downwards.(Fig. 2) also has a brace apparatus between the joint cross bar third from the bottom, when opening double ladder, fix its certain angle when double ladder being opened and ladder is locked, during gathering by strut in installing and locating button, the lock pin of locating button in the pulling brace apparatus, then the both sides of double ladder fold automatically.

The utility model in use, as long as slam two cross bars of next joint of double ladder with a pin, with portable each cross bar, then the interior bearing pin of each cross bar enters the fixing hole of vertical rod automatically under spring action, reaches the purpose of extension double ladder height.

The utlity model has simple in structure, carry, easily collection wide with easy to operate, the scope of application, make the small-sized ladder of 3-4 joint, provide a kind of convenient and practical instrument to press photographer or shutterbugs and house decoration etc.Same principle also can be made the more double ladder of joint number as required.Below in conjunction with accompanying drawing enforcement of the present utility model is described in further detail:

Description of drawings

Fig. 1 is that the master of the utility model when opening looks schematic diagram;

Fig. 2 is that schematic diagram is looked on the right side of the utility model when opening;

Fig. 3 is the wire rope stretching device structural representation in the utility model cross bar;

Fig. 4 is the pressure handle stretching device structural representation in the utility model cross bar;

Fig. 5 is the structural representation of the utility model brace apparatus;

Master when Fig. 6 is the utility model gathering looks schematic diagram;

Schematic diagram is looked on right side when Fig. 7 is the utility model gathering;

Fig. 8 is the schematic diagram that the concavo-convex face of cylinder of the present utility model hinge bar cooperates.

The specific embodiment

As Fig. 1-shown in Figure 7, the vertical rod 1 that is formed by the similar pipe suit of number joint diameter is the portable stretchable double ladder of being made up of a pair of concavo-convex face of cylinder hinge bar on cross bar 2 and the top cross bar with the identical square tube of number joint sectional area, it is characterized in that in joint second from the bottom and the 3rd vertical rod that saves two circular locating holes being arranged all, all there are a lining 3 and adapter sleeve 4 in the upper end of every joint vertical rod, cross bar 2 is connected with adapter sleeve with an angle of 90 degrees, there is a pair of wire rope stretching device (Fig. 3) at two ends in the joint cross bar second from the bottom, an axis pin base 5 and bearing pin 6 are arranged in this device, drawing-pressing spring 7, the afterbody of bearing pin 6 connects a wire rope 8, the afterbody exposed parts of wire rope is a ring-type, the head of bearing pin 6 passes the circular locating hole in adapter sleeve 4 and two vertical rods of lining 3 insertions, the pulling wire line thimble, by sliding pin 9 bearing pin 6 is drawn in the axis pin base 5, the vertical rod that makes a joint is to lower slider (double ladder contraction).There is a pair of pressure handle stretching device (Fig. 4) at two ends in the joint cross bar third from the bottom, an axis pin base 10 and bearing pin 11 are arranged in this device, a movable pressure handle 12 is arranged in the bearing pin 11, the afterbody of bearing pin 11 has a compression spring 13, bearing pin 11 passes adapter sleeve and lining inserts in the circular locating hole of vertical rod up and down, and gently pressure handle 12, and bearing pin 11 moves in axis pin base 10, bearing pin breaks away from the circular locating hole in two vertical rods, and the vertical rod and the cross bar of a last joint move down (contraction) simultaneously.A brace apparatus is arranged between the joint cross bar third from the bottom, combine by hinge bar 14, rivet 15, strut 16, locating button 17, spring 18, lock pin 19, when opening double ladder, strut and locating button in the device open certain angle to double ladder, and it is fixed, during gathering, the lock pin 19 on the pulling locating button can fold double ladder.For safety there is one to seal protective sleeve 20 on the concavo-convex face of cylinder hinge bar in the cross bar of top, a pair of anti-slip rubber heelpiece 21 is arranged in the joint vertical rod last.

Claims

1, a kind of portable stretchable double ladder, comprise vertical rod (1), cross bar (2), the concavo-convex face of cylinder, top hinge bar, all there are a lining (3) and adapter sleeve (4) in the upper end that it is characterized in that each joint vertical rod (1), two circular locating holes are all arranged in the vertical rod of joint second from the bottom and joint third from the bottom, cross bar (2) is connected with adapter sleeve (4) in the vertical rod (1) with an angle of 90 degrees, there is a pair of wire rope stretching device at two ends in the cross bar of joint second from the bottom, there is a pair of pressure handle stretching device at two ends in the cross bar of joint third from the bottom, and a brace apparatus is arranged between the joint cross bar third from the bottom.

2, portable stretchable double ladder according to claim 1, it is characterized in that having in the wire rope stretching device axis pin base (5) and bearing pin (6), drawing-pressing spring (7), the head of bearing pin (6) passes adapter sleeve (4) and lining (3) inserts in the circular locating hole of joint second from the bottom and joint vertical rod third from the bottom, the afterbody of bearing pin (6) connects a wire rope (8), and the afterbody of wire rope (8) exposes to cross bar (2) bottom with ring-type.

3, portable stretchable double ladder according to claim 1, it is characterized in that having in the pressure handle stretching device axis pin base (10) and bearing pin (11), compression spring (13), a movable pressure handle (12) is arranged in the bearing pin (11), the head of bearing pin (11) passes adapter sleeve (4) and lining (3) inserts in the circular locating hole of vertical rod up and down, and the afterbody of bearing pin connects a compression spring (13).

4, portable stretchable double ladder according to claim 1, it is characterized in that having on the brace apparatus the movable mutually riveted joint of two hinge bars (14) and rivet (15), and there are two struts (16) and rivet (15) to flexibly connect, a locating button (17) of being made up of spring (18) and lock pin (19) and shell is arranged on two struts.