CN201902159U

CN201902159U - Ladder with telescopic backrest

Info

Publication number: CN201902159U
Application number: CN201020664633XU
Authority: CN
Inventors: 姚柏松; 黄伟; 顾云海
Original assignee: JIAXING TAIHAO TOUR PRODUCTS CO Ltd
Current assignee: JIAXING TAIHAO TOUR PRODUCTS CO Ltd
Priority date: 2010-12-09
Filing date: 2010-12-09
Publication date: 2011-07-20
Anticipated expiration: 2020-12-09

Abstract

The utility model relates to a ladder with a telescopic backrest, which comprises a pair of ladder legs and a plurality of pedals arranged on the ladder legs, wherein connecting elements are arranged at the upper parts of the ladder legs, installing parts extend from the connecting elements to the outside of the connecting elements, a tool table is pivoted with the installing parts through a pivoting shaft, the lower part of the backrest is arranged between the connecting elements and the pivoting shaft, a pad block with elasticity is arranged between the backrest and the pivoting shaft, and the tool table is provided with a cam part pressed on the pad block. The ladder has the advantages that the backrest can easily extend and retract to various proper heights, the use is more comfortable and safer, the backrest can be contracted to the minimum height when the ladder is not used, the space occupied by the ladder is reduced, and the transportation and the storage are more convenient.

Description

A kind of backrest telescopic ladder

Technical field

The utility model relates to a kind of ladder, relates in particular to a kind of backrest telescopic ladder.

Background technology

Ladder is widely used in the various aspects in the daily life as a kind of daily instrument commonly used of ascending a height, as pruning the eminence branches and leaves, ascending a height and get the thing storing, change the bulb, clean glass window etc.Present widely used ladder does not have backrest mostly, backrest described here refers to the user and steps on the part that can help or rely on after the ladder eminence, this class ladder is not owing to there is backrest, the user does not have other supports after stepping on the ladder eminence except the stair treads that pin is being stepped on, usually need health leaned against or hand steered on other objects, as if the object that does not have on every side to rely on or to help, just relatively more dangerous.So people have set up backrest on ladder, these backrests are installed on the terraced leg usually, in different use occasions, also inequality to the requirement for height of backrest, these are installed in the backrest on the terraced leg, not too high not too short, do not satisfy the various demands in using.Crossing short backrest can't provide by means of the power place for the user, and disequilibrium is relatively required great effort during use easily; And too high backrest has taken the space, has increased the volume of ladder, is not easy to the transportation and the storage of ladder.

Summary of the invention

The purpose of this utility model is, a kind of backrest telescopic ladder is provided, and stores convenience with comfort and the transportation that improves ladder.

To achieve these goals, the technical solution adopted in the utility model is: a kind of backrest telescopic ladder, comprise a pair of terraced leg, be installed in the some pedals on the terraced leg, wherein, the top of terraced leg is provided with connector, and installation portion extends to the outside of connector from connector, tool stand articulates by pivot and installation portion, the bottom of backrest is between connector and pivot, and the rubber-like cushion block is arranged between backrest and the pivot, and tool stand has the cam part that is pressed on the cushion block.

In such scheme, adjust elasticity between connector, backrest and the cushion block by the turning tool platform, when needs stretch backrest, tool stand turned to make between connector, backrest and the cushion block the position of pine, backrest like a cork can stretch, backrest adjust to be fit to the position after, can turn to tool stand and make position tighter between connector, backrest and the cushion block, backrest is locked at this position.The utility model can be retractable to various suitable height to backrest like a cork, uses comfortable and safely, can contract backrest to minimum constructive height when not using, and has reduced taking up room of ladder, and transportation stores convenient.

Description of drawings

Fig. 1 is the utility model backrest telescopic ladder stereogram;

Fig. 2 is the utility model backrest telescopic ladder STRUCTURE DECOMPOSITION figure;

Fig. 3 is the A portion structure enlarged drawing among Fig. 2;

Ladder part-structure sectional view when Fig. 4 is in Telescoping for backrest;

Ladder part-structure sectional view when Fig. 5 is in locking state for backrest;

Fig. 6 is the state diagram of ladder after folding.

Below in conjunction with accompanying drawing the utility model is described in detail.

The specific embodiment

Referring to Fig. 1, the pedal that comprises big pedal 22 and two little pedals 21 is between the terraced leg 1 of pair of parallel, big pedal 22 and little pedal 21 are hinged at place, side and terraced leg 1, big pedal 22 is above little pedal 21, trample when big pedal 22 is used to climb to the work of ladder highest point, for safety and the comfort that improves ladder, the horizontal area of big pedal 22 is greater than little pedal 21, the quantity of little pedal 21 can be provided with according to the height situation of ladder, is not limited to two.

The top of ladder leg 1 is provided with connector 8, and connector 8 is roughly the cylindric of hollow.Referring to Fig. 3, installation portion 81 extends to the outside of connector from connector 8 on the top of connector 8, is tabular.Installation portion 81 is provided with through hole, also is provided with through hole on the tool stand 7, and pivot 91 passes from these through holes, and tool stand 7 is articulated on the installation portion 81.Referring to Fig. 4 and Fig. 5, connector 8 is provided with breach in pivot 91 relative positions, and cushion block 92 is arranged in this breach, and cushion block 92 when being subjected to the external force extruding elastic deformation can take place by making such as plastics, silica gel or rubber elastomeric material.Backrest 6 is a U-shaped frame, and the bottom of two expansion links 61 that it is parallel is stretched in the connector 8, and between connector 8 and cushion block 92, and cushion block 92 is between pivot 91 and expansion link 61.Friction plate 10 with anti-skidding effect is arranged between expansion link 61 and the cushion block 92, can strengthen the locking effect to expansion link 61.

Referring to Fig. 3 to Fig. 5, tool stand 7 has the cam part 71 that is positioned near connector 8 one sides, and cam part 71 is pressed on the cushion block 92, and cam part 71 is for being the eccentric structure of center of rotation with pivot 91, point on its curved surface profile is to the distance of pivot 91, reduced gradually to both sides by farthest position, pinnacle.Can contact with cushion block by the position that turning tool platform 7 makes on the cam part with pivot has a different distance like this, to adjust the elasticity between connector 8, expansion link 61 and the cushion block 92.Referring to Fig. 4, when needs stretched backrest, the turning tool platform 7 upward, contact with cushion block from the nearer position of pivot on the cam part, and cushion block 92 is stressed little, and expansion link 61 is unclamped, and can stretch expansion link 61 come out like a cork or shrink back this moment; Referring to Fig. 5, after backrest being adjusted to the position that is fit to height, rotate tool stand 7, contact with cushion block from pivot position far away on the cam part, cam part 71 is pressed to expansion link 61 to cushion block 92, and compresses gradually, and backrest is locked at this position.

Referring to Fig. 4 and Fig. 5, the top of connector 8 is provided with to its inner boss 1 that protrudes, and the bottom of expansion link 61 is provided with anticreep spare 94, and the bottom of anticreep spare 94 has boss 2 942, the diameter of boss 2 942 can prevent like this that greater than the diameter of boss 1 expansion link 61 is separated from connector 8.Referring to Fig. 3, also be provided with the baffle plate 82 that is positioned at installation portion 81 belows on the connector 8, baffle plate 82 is used to limit tool stand and rotates downwards, further strengthens the locking effect to expansion link 61.Referring to Fig. 1, the front of tool stand 7 (being the ladder face that tool stand makes progress when user mode) is provided with the groove 72 of indent, and instrument or finding etc. can be placed in the groove 72, easily.

The utility model can be retractable to various suitable height to backrest like a cork, uses comfortable and safely, can contract backrest to minimum constructive height (as shown in Figure 6) when not using, and has reduced taking up room of ladder, and transportation stores convenient.

The ladder of present embodiment not only backrest can stretch, and ladder can fold, and the ladder after folding is plate-like (as shown in Figure 6), compact conformation, and it is little to take up room, and is convenient to transportation more and stores.Referring to Fig. 1, a pair of connection leg 3 be arranged in parallel with terraced leg 1, and connection leg 3 also is hinged on the side of big pedal 22 and little pedal 21, and big pedal 22 is inequality with the articulated position of terraced leg 1 and connection leg 3 respectively with each little pedal 21.The top of hound 4 and terraced leg 1 are hinged, and the two ends of brace 5 are hinged with connection leg 3 and hound 4 respectively.Referring to Fig. 2, hound 4 has the support bar 42 on top therein, and the back side (the downward face of big pedal when ladder is in user mode) of big pedal 22 is provided with the draw-in groove 221 of circular arc.When ladder is in user mode (as shown in Figure 1), the support bar 42 on the hound 4 makes big pedal 22 low leaning against on the support bar 42, thereby makes hound 4 provide safer stable support for big pedal in the draw-in groove 221 at big pedal 22 back sides.

The foregoing description only is used for the understanding to the utility model design; it is not restriction to the utility model design; according to all right many structural variations of the utility model design; for example; backrest stretching structure of the present utility model can combine with other ladder structures; as combining with the one-piece ladder minor structure or combining with other folded ladder structures, these variations all belong to protection domain of the present utility model.

Claims

1. backrest telescopic ladder, comprise a pair of terraced leg (1), be installed in the some pedals (21 on the described terraced leg, 22), it is characterized in that, the top of described terraced leg (1) is provided with connector (8), installation portion (81) extends to the outside of connector (8) from connector (8), tool stand (7) articulates by pivot (91) and described installation portion (81), the bottom of backrest (6) is between described connector (8) and pivot (91), rubber-like cushion block (92) is arranged between backrest (6) and the pivot (91), and described tool stand (7) has the cam part (71) that is pressed on the cushion block (92).

2. backrest telescopic ladder according to claim 1 is characterized in that, described connector (8) is the tubular of hollow, and the bottom of described backrest is stretched in the described connector (8), and connector (8) has a breach, and cushion block (92) is arranged in the described breach.

3. backrest telescopic ladder according to claim 2 is characterized in that, described backrest (6) is a U-shaped frame, and the bottom of two expansion links (61) that it is parallel is stretched in the described connector (8).

4. backrest telescopic ladder according to claim 3 is characterized in that, is provided with friction plate (10) between described expansion link (61) and cushion block (92).

5. backrest telescopic ladder according to claim 4, it is characterized in that, the top of described connector (8) is provided with to its inner boss one (83) that protrudes, the bottom of described expansion link (61) is provided with the anticreep spare (94) with boss two (942), and the diameter of boss two (942) is greater than the diameter of boss one (83).

6. backrest telescopic ladder according to claim 5 is characterized in that, also is provided with the baffle plate (82) that is positioned at installation portion (81) below on described connector (8).

7. backrest telescopic ladder according to claim 6 is characterized in that, the front of described tool stand (6) is provided with the groove (72) of indent.

8. according to each described backrest telescopic ladder of claim 1-7, it is characterized in that, described pedal comprises little pedal (21) and the big pedal (22) above little pedal, a pair of connection leg (3) be arranged in parallel with described terraced leg (1), described big pedal (22) and little pedal (21) are all hinged with described terraced leg (1) and connection leg (3), the top of hound (4) and described terraced leg (1) are hinged, the two ends of brace (5) are hinged with described connection leg (3) and hound (4) respectively, hound (4) has support bar (42), when ladder was in user mode, big pedal (22) is low to be leaned against on the described support bar (42).

9. backrest Collapsible ladder according to claim 8 is characterized in that, the back side of described big pedal (22) is provided with draw-in groove (221), and when ladder was in user mode, support bar (42) was in described draw-in groove (221).