CN211314074U

CN211314074U - Transversely extendable ladder

Info

Publication number: CN211314074U
Application number: CN201921248011.6U
Authority: CN
Inventors: 孙守义
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-08-21
Anticipated expiration: 2029-08-02

Abstract

The utility model provides a ladder capable of extending transversely, which is characterized in that at least three straight bars are transversely arranged, a plurality of pedals are arranged between two adjacent straight bars at equal intervals and are horizontally arranged from top to bottom to form at least two ladder frames, wherein, a first pivot is arranged at the transverse two ends of each pedal and is respectively pivoted on the corresponding positions of the straight bars, so that each pedal can be synchronously pivoted between the two adjacent straight bars to be folded or transversely unfolded, thereby improving the service efficiency of the ladder; when each pedal forms a first folding and folding state, the two adjacent straight rods can approach to the middle to reduce the transverse width and range of each ladder frame, so that the limitation or over-narrowing of the width of the pedal between the two adjacent straight rods can be avoided.

Description

Transversely extendable ladder

Technical Field

The present invention relates to a ladder, and more particularly to a transversely extendable ladder that includes at least two ladder frames and has pedals that pivot between two adjacent vertical bars in synchronization to fold or unfold the ladder.

Background

The ladder is a common auxiliary tool in daily life, has a wide application range, and is mainly used for users to carry out various operations, such as roof decoration, painting, lighting equipment replacement, article storage and the like, at a high place exceeding the height of the users. The present ladder is not only a general ladder (leaning ladder) or an a-shaped ladder (the top of the front and rear ladders are connected and the bottoms of the two ladders can be opened and supported), but also a ladder with folding function or upward extension function is designed.

However, the existing ladder only has a single ladder frame (i.e. the width of the pedal), and only one person can climb, so that the operation range (or width) of a user after climbing the ladder each time is relatively limited, when the operation range (such as the transverse distance) of a high place is large, the user needs to arrange the ground supporting position of the ladder and then climb up to one local range of the operation each time, so that the whole operation range is often divided into multiple operations to be completed, namely the user needs to continuously climb down to move the ladder and then climb up to perform the operation, thus not only increasing the operation time, but also consuming physical strength because the user needs to climb up and down the ladder; in addition, the existing ladder can only be used for one person to climb, when two or more persons need to climb the ladder to the same high place for operation (if two persons lift an article synchronously), the two persons need to use the ladder respectively and arrange in parallel; the above situation not only causes the trouble and trouble of the user, but also affects the use efficiency of the ladder; furthermore, the width of the step between two adjacent straight bars of the ladder must be a proper width (e.g. 45-50cm but not limited as usual), because if the width of the step is not wide enough due to the structural design, the area of the user stepping on the step is relatively limited, which easily causes the problem that the user is unstable in standing and cannot easily climb up and down between the upper and lower steps (typically, the height between the upper and lower steps is about 30cm but not limited).

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a ladder that can transversely extend, it is for utilizing three at least straight-bars transverse arrangement and be equipped with many footboards between two adjacent straight-bars from top to bottom equidistant horizontal arrangement in order to constitute two at least ladder frames, wherein the horizontal both ends of each footboard more establish a first pivot and respectively the pivot establish a corresponding position on each straight-bar, make each footboard can synchronous pivot receive or transversely expand in order to fold between two adjacent straight-bars, can only supply alone to scramble and the relatively limited problem of its horizontal operation scope with effectively solving current ladder when using, and promote the availability factor of ladder, and avoid the footboard width between two adjacent straight-bars limited or too narrow.

To achieve the above objects, the present invention provides a ladder capable of extending transversely, which comprises at least two ladder frames, wherein the at least two ladder frames have at least three straight bars, the at least three straight bars include two outer straight bars and at least one middle straight bar arranged between the two outer straight bars, wherein a plurality of pedals are arranged between the two adjacent straight bars at equal intervals and horizontally arranged from top to bottom, so that the two adjacent straight bars and a plurality of pedals arranged therebetween form a ladder frame, wherein a first pivot and a tilt pivot seat are respectively arranged at both transverse ends of each pedal, and each first pivot and each tilt pivot seat are fixedly arranged at a corresponding position on each straight bar at an angle, so that each pedal can be synchronously pivoted by connecting each pivot seat between the two adjacent straight bars; each pedal of each ladder frame can be pivoted and folded between the two adjacent straight rods by virtue of the first pivot shafts at the two transverse ends of each ladder frame so as to be folded to form a first folding and folding state; when the pedals of each ladder frame form the first folding and folding state, the two adjacent straight rods can approach to the middle to reduce the transverse width and range of each ladder frame; when two adjacent straight rods are transversely unfolded from the first folding and folding state, each pedal of each ladder frame can be pivoted and unfolded between the two adjacent straight rods by virtue of the first pivot shafts at the transverse two ends of each ladder frame and unfolded to form an unfolded use state; wherein the at least two ladder frames are selectively deployable in unison to form a deployed use condition having a laterally extending width and extent of the at least two ladder frames, or wherein each ladder frame is selectively deployable individually to form a deployed use condition having a lateral width and extent of a single ladder frame; each pedal arranged on each ladder frame forms an inclination pedal by virtue of each first pivot and each inclination pivot seat, and the inclination pedal is an inclined plane with a forward inclination angle and serves as a pedal surface; when the straight rods of the ladder frames are vertically erected on the ground, the inclined surfaces of the inclined pedals form an inclined state of a forward inclined angle with the ground, and when the straight rods of the ladder frames are obliquely erected on the ground for use, the inclined surfaces of the inclined pedals form a horizontal state with the ground for the convenience of pedaling.

In an embodiment of the present invention, a second pivot is further disposed at a middle portion of each step of each ladder frame, so that each step can be pivoted and folded between the two adjacent straight bars by the pivoting of the first pivot and the second pivot to form a second folded and folded state.

Rely on above-mentioned structure, the utility model discloses a ladder has following advantage:

1. the utility model discloses a ladder has two at least ladder frames, can select along with user's needs two at least ladder frames expand in step or only select wherein arbitrary or above ladder frame to expand, are enough to promote user's operating efficiency.

2. The utility model discloses a ladder has two at least ladder frames, can supply two or above user to scramble simultaneously or in step, is enough to promote the availability factor of ladder.

3. When the utility model discloses an each footboard of each ladder frame forms during the first folding state of receiving, two adjacent straight-bars can be close to the horizontal width and the scope in order to reduce each ladder frame to the centre, can avoid the limited or too narrow of footboard width between two adjacent straight-bars.

Drawings

Fig. 1 is a perspective view of another embodiment of the present invention, which is used by leaning against a wall surface.

Fig. 2 is a partial schematic front view of fig. 1.

Fig. 3 is a schematic front view of fig. 2 in a half-folded state.

Fig. 4 is a schematic front view of fig. 3 in a fully collapsed state.

Fig. 5 is a side view of fig. 4.

Fig. 6 is a side partially enlarged schematic view of fig. 5.

Fig. 7 is a side sectional partially enlarged schematic view of the step of fig. 1-6.

Fig. 8 is a schematic view of the straight rod in fig. 7 becoming an oblique ground.

Fig. 9 is a perspective view of another embodiment of the present invention used by leaning against a wall surface.

Fig. 10 is a partially enlarged front view of fig. 9.

Fig. 11 is a front view of fig. 10 in a semi-collapsed state.

Fig. 12 is a schematic front view of fig. 11 in a fully collapsed state.

Fig. 13 is a side view of fig. 12.

Fig. 14 is a side partially enlarged schematic view of fig. 13.

Description of reference numerals: 1, a ladder; 10 a ladder frame; 20 straight rods; 21 an outer straight rod; 22 a middle straight rod; 30 pedals; 30a slope pedal; end 31; 32 inclined planes; 33 a pedal surface; 40 a first pivot; 50 a second pivot; 60 pitch pivot mount.

Detailed Description

The cooperation icon will the utility model discloses a structure and technical feature details are as the back, and wherein each figure shows only to be used for explaining the utility model discloses a structure is closed and is related function, therefore the size of each subassembly is not according to actual ratio setting and non-for the restriction the utility model discloses.

Conventional ladders include general ladders (for leaning against), a-shaped ladders, etc., but the types of ladders are not the main appeal of the present invention, and therefore, the present invention will be described only with respect to technical features of ladders that can be extended laterally.

Referring to fig. 1 to 14, the present invention relates to a ladder 1 which is extendable laterally, said ladder 1 comprising at least two ladder legs 10, the at least two ladder frames 10 are provided with at least three straight bars 20, the at least three straight bars 20 comprise two outer straight bars 21 and at least one middle straight bar 22 arranged between the two outer straight bars 21, wherein a plurality of pedals 30 are arranged between two adjacent straight bars 20 and are horizontally arranged from top to bottom at equal intervals, so that the two adjacent straight bars 20 and the plurality of pedals 30 arranged between the two adjacent straight bars form a ladder frame 10, wherein, the two lateral ends 31 of each pedal 30 are respectively provided with a first pivot 40 and a tilt pivot base 60, each first pivot 40 and each tilt pivot base 60 are fixed on a corresponding position of each straight rod 20 for inclining at an angle (such as designed to be about 15 degrees different from the horizontal but not limited), so that each pedal 30 can be synchronously pivoted by connecting each tilt pivot base 60 between the two adjacent straight rods 20. Each step 30 of each ladder frame 10 can be folded and folded between the two adjacent vertical bars 20 by the first pivot 40 at the two transverse ends 31 thereof to form a first folded and folded state as shown in fig. 4 to 6 and 12 to 14, wherein when each step 30 is folded and folded, the step extends and protrudes obliquely to the front of each vertical bar 20 due to the inclined structure of each first pivot 40 and each inclined pivot seat 60, and the adjacent steps 30 are formed to be arranged in a vertically staggered manner as shown in fig. 5 to 6 and 13 to 14.

When the steps 30 of each ladder frame 10 are in the first folded state, the two adjacent straight bars 20 can approach to the middle to reduce the transverse width and range of each ladder frame 10, and the steps 30 between the ladder frames can be displaced without affecting the folding of each ladder frame 10, as shown in fig. 5, 6, 13 and 14, and the width of each step 30 of each ladder frame 10 can be prevented from being limited.

When two adjacent straight rods 20 are unfolded transversely from the first folded and folded state, each step 30 of each ladder frame 10 can be unfolded and pivoted between the two adjacent straight rods 20 by the first pivot 40 at the transverse ends 31 thereof and unfolded to form an unfolded use state as shown in fig. 1, 2, 9 and 10.

In addition, the at least two ladders 10 can be selectively unfolded simultaneously to form an unfolded use state having the transverse extending width and range of the at least two ladders 10 as shown in fig. 1, 2, 9 and 10, but not limited thereto, i.e., an unfolded use state in which each ladder 10 is individually unfolded to form a single ladder 10 having the transverse width and range may also be selected.

Referring to fig. 7 and 8, each step 30 of each ladder 10 is formed into a slope step 30a by means of each first pivot 40 and each slope pivot seat 60, the slope step 30a being a slope 32 with a forward slope angle (about 15 degrees from horizontal without limitation) for the tread surface 33; when the respective linear rods 20 of the respective ladder frames 10 stand vertically on the ground, the inclined surfaces 32 of the respective slope steps 30a are inclined at a forward inclination angle with respect to the ground as shown in fig. 7; when the vertical rods 20 of the ladder frames 10 are obliquely erected on the ground for use (leaning against the wall as shown in fig. 1 or 9 without limitation), the inclined surface 32 of each inclined pedal 30a is formed to be horizontal with the ground for use of pedaling as shown in fig. 8.

Referring to fig. 1 to 8, a second pivot 50 is further disposed at a middle portion of each step 30 of each ladder frame 10, so that each step 30 can be pivoted and folded between the two adjacent straight bars 20 by the pivoting of the first pivot 40 and the second pivot 50, and further folded to form a second folded state as shown in fig. 4 to 6.

1. the ladder of the utility model is provided with at least two ladder frames 10, and can be selected according to the needs of users, the at least two ladder frames 10 are synchronously unfolded or only one or more ladder frames 10 are selected to be unfolded, which is enough to promote the operation efficiency of users.

2. The utility model discloses a ladder has two at least ladder frames 10, can supply two or above user to scramble simultaneously or in step, is enough to promote the availability factor of ladder.

3. When the utility model discloses an each footboard 30 of each ladder frame 10 forms during the first folding state of closing, two adjacent straight-bars 20 can be close to in the middle of in order to reduce the transverse width and the scope of each ladder frame 10, can avoid the footboard width between two adjacent straight-bars limited or too narrow.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A laterally extendable ladder, comprising:

at least two ladder frames, which are provided with at least three straight bars, wherein the at least three straight bars comprise two outer straight bars and at least one middle straight bar arranged between the two outer straight bars, a plurality of pedals which are horizontally arranged from top to bottom at equal intervals are arranged between the two adjacent straight bars, so that the two adjacent straight bars and the plurality of pedals arranged between the two adjacent straight bars form a ladder frame, wherein both transverse ends of each pedal are respectively provided with a first pivot shaft and an inclination pivot shaft seat, and each first pivot shaft and each inclination pivot shaft seat are fixedly arranged at a corresponding position on each straight bar in an inclined manner at an angle, so that each pedal can be synchronously pivoted by connecting each inclination pivot shaft seat between the two adjacent straight bars;

each pedal of each ladder frame can be pivoted and folded between the two adjacent straight rods by virtue of the first pivot shafts at the two transverse ends of each ladder frame so as to be folded to form a first folding and folding state;

when the pedals of each ladder frame form the first folding and folding state, the two adjacent straight rods can approach to the middle to reduce the transverse width and range of each ladder frame;

when two adjacent straight rods are transversely unfolded from the first folding and folding state, each pedal of each ladder frame can be pivoted and unfolded between the two adjacent straight rods by virtue of the first pivot shafts at the transverse two ends of each ladder frame and unfolded to form an unfolded use state;

wherein the at least two ladder frames are selectively deployable in unison to form a deployed use condition having a laterally extending width and extent of the at least two ladder frames, or wherein each ladder frame is selectively deployable individually to form a deployed use condition having a lateral width and extent of a single ladder frame;

wherein each pedal arranged on each ladder frame forms an inclination pedal by virtue of each first pivot and each inclination pivot seat, and the inclination pedal is an inclined plane with a forward inclination angle and serves as a pedal surface; when the straight rods of the ladder frames are vertically erected on the ground, the inclined surfaces of the slope pedals form an inclined state of a forward inclined angle with the ground, and when the straight rods of the ladder frames are obliquely erected on the ground for use, the inclined surfaces of the slope pedals form a horizontal state with the ground.

2. A ladder as claimed in claim 1, wherein a second pivot is provided at a central portion of each of the steps of each ladder frame, such that each step is pivotally folded between the adjacent two vertical bars by the pivoting of the first pivot and the second pivot and is also folded to form a second folded state.