CN214576692U

CN214576692U - Telescopic ladder

Info

Publication number: CN214576692U
Application number: CN202023084042.8U
Authority: CN
Inventors: 谢小燕; 杨贵军
Original assignee: Suzhou Pica Aluminum Industry Co Ltd
Current assignee: Suzhou Pica Aluminum Industry Co Ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-11-02
Anticipated expiration: 2030-12-18

Abstract

A telescopic straight ladder comprises a first ladder section and a second ladder section; the first ladder section and the second ladder section are attached to each other front and back and are connected in a vertical sliding mode, and in the sliding process, the first ladder section and the second ladder section are in a relatively contracted state and a relatively expanded state; a first limiting plate and a second limiting plate are arranged on the first ladder section; the first limiting plate is fixedly arranged at the upper end of the left ladder leg of the first ladder section and hooks the left ladder leg of the second ladder section, and the second limiting plate is fixedly arranged at the upper end of the right ladder leg of the first ladder section and hooks the right ladder leg of the second ladder section, so that the first ladder section and the second ladder section are mutually attached and mutually slide; the upper end and the lower end of the second ladder section are provided with limiting structures corresponding to the first limiting plate and the second limiting plate, and the limiting structures are matched with the first limiting plate and the second limiting plate to limit the relative sliding range of the first ladder section and the second ladder section; the first ladder section and the second ladder section are maintained in a relatively contracted state or a relatively expanded state through a locking structure pair.

Description

Telescopic ladder

Technical Field

The utility model relates to an apparatus of ascending a height, concretely relates to telescopic word ladder.

Background

The I-shaped ladder is used as a climbing tool, and people can climb up and down when the I-shaped ladder is used; in order to adapt to different climbing heights, the one-line ladder is usually designed to be longer, but the overlong one-line ladder is inconvenient to store and poor in convenience.

Therefore, how to solve the above-mentioned deficiencies of the prior art is a problem to be solved by the present invention.

Disclosure of Invention

The utility model aims at providing a flexible line ladder, in order to reach above-mentioned purpose, the utility model discloses a technical scheme be:

a telescopic straight ladder comprises a first ladder section and a second ladder section; the first ladder section and the second ladder section respectively comprise a left ladder leg, a right ladder leg and a plurality of pedals connected between the ladder legs at two sides;

the first ladder section and the second ladder section are attached to each other front and back and are connected in a vertical sliding mode, and in the sliding process, the first ladder section and the second ladder section are in a relatively contracted state and a relatively expanded state;

a first limiting plate and a second limiting plate are arranged on the first ladder section;

the first limiting plate and the second limiting plate are both of L-shaped claw-shaped structures;

the first limiting plate is fixedly arranged at the upper end of the left ladder leg of the first ladder section on one hand, and hooks the left ladder leg of the second ladder section on the other hand, so that the left ladder leg of the first ladder section and the left ladder leg of the second ladder section are attached to each other;

the second limiting plate is fixedly arranged at the upper end of the right ladder leg of the first ladder section on one hand, and hooks the right ladder leg of the second ladder section on the other hand, so that the right ladder leg of the first ladder section and the right ladder leg of the second ladder section are attached to each other;

the upper end and the lower end of the second ladder section are provided with limiting structures corresponding to the first limiting plate and the second limiting plate;

in the relative contraction state, the first limiting plate and the second limiting plate are limited at the upper end of the second ladder section by the limiting structure;

in the relative unfolding state, the first limiting plate and the second limiting plate are limited at the lower end of the second ladder section by the limiting structure;

the first ladder section is provided with a lock pin assembly, and the second ladder section is provided with a lock hole matched with the lock pin assembly, so that the first ladder section and the second ladder section are kept in a relatively contracted state or a relatively expanded state.

Further, the limiting structure comprises a third limiting plate, a fourth limiting plate and a limiting rivet;

the third limiting plate and the fourth limiting plate are both of L-shaped claw-shaped structures;

the third limiting plate is fixedly arranged at the lower end of the left ladder leg of the second ladder section on one hand, and hooks the left ladder leg of the first ladder section on the other hand, so that the upper end limit of the first limiting plate is formed;

the fourth limiting plate is fixedly arranged at the lower end of the right ladder leg of the second ladder section on one hand, and hooks the right ladder leg of the first ladder section on the other hand, so that the upper end limit of the second limiting plate is formed, and then the third limiting plate and the fourth limiting plate are matched to form the upper end limit of the second ladder section;

the upper ends of the left ladder legs of the second ladder section and the right ladder legs of the second ladder section are respectively fixed with the limiting rivet, so that the lower end of the second ladder section is limited.

Furthermore, the pedals, the left ladder leg and the right ladder leg are all of hollow structures, and two end parts of the pedals are connected with the left ladder leg or the right ladder leg through reinforcing structures;

the reinforcing structure comprises a connecting block, a fixing rivet and a connecting rivet; the connecting blocks are columnar, and the fixing rivets penetrate through the connecting blocks along the left and right directions to be fixedly connected with the ladder legs; two fixing rivets are arranged in each connecting block in a penetrating way, and the two rivets are arranged in tandem; the footboard both ends are all established on the connecting block, and the footboard both ends are passed through connect rivet and connecting block fixed connection to this constitutes footboard fixed connection between left side ladder leg or right side ladder leg.

Furthermore, the lock pin assembly of the first ladder section comprises a lock pin and a spring, the lock pin is provided with a rod body, the rod body penetrates through the ladder legs in the front-back direction, the front end of the rod body is fixedly provided with a rod cap, the rod cap is positioned outside the front side of the ladder legs, the rear end of the rod body is provided with a step, the step is positioned outside the rear side of the ladder legs, the diameter of the step is larger than that of the rod body, one end of the spring acts on the step, and the other end of the spring acts on the inner walls of the ladder legs, so that a force in the front-back direction is applied to the lock pin;

an upper locking hole and a lower locking hole are arranged on the ladder leg of the second ladder section, and the diameter of the upper locking hole and the diameter of the lower locking hole are equal to the diameter of the ladder on the bar body.

Further, the upper ends and the lower ends of the left ladder leg of the first ladder section, the right ladder leg of the first ladder section, the left ladder leg of the second ladder section and the right ladder leg of the second ladder section are respectively provided with an anti-skidding rubber mat.

The relevant content in the above technical solution is explained as follows:

1. in the above scheme, the lock pin assembly is matched with the locking hole, so that the first ladder section and the second ladder section can be kept in the unfolding state or the folding state.

2. In the above scheme, the first limiting plate and the second limiting plate are arranged on the first ladder section and used for holding the second ladder section; the third limiting plate and the fourth limiting plate are arranged on the second ladder section and used for holding the first ladder section, so that the first ladder section and the second ladder section are held mutually and slide mutually.

3. In the scheme, the first limiting plate and the third limiting plate can limit each other, the second limiting plate and the fourth limiting plate can limit each other, and the limiting rivet limits the first limiting plate and the second limiting plate, so that the first ladder section and the second ladder section can slide relatively within a certain range;

also can use spacing rivet to replace third limiting plate and fourth limiting plate on the second ladder section for first limiting plate and the second limiting plate on the first ladder section slide in the ascending certain limit in upper and lower direction.

4. In the scheme, the left ladder leg and the right ladder leg of the first ladder section and the second ladder section are connected with the pedal through the reinforcing structure;

the reinforcing structure can improve the connection strength of the pedal and the ladder legs, so that the straight ladder can still have certain strength under the condition that the thickness of the pedal and the ladder legs is reduced for reducing the weight, and the portability of the straight ladder is improved.

The working principle of the utility model is as follows:

The utility model has the advantages as follows:

first ladder section and second ladder section can stretch out and draw back from top to bottom, make a word ladder provide different length in order to satisfy the user demand, and the storage of being convenient for under the contraction state, convenient to use.

Drawings

Fig. 1 is a perspective view of a linear ladder in a contracted state in an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a perspective view of the linear ladder in the embodiment of the present invention in an expanded state;

fig. 4 is a perspective view of the linear ladder in the embodiment of the present invention, after the pedals are removed;

FIG. 5 is an enlarged view of portion B of FIG. 4;

fig. 6 is a perspective view of a first ladder section in an embodiment of the present invention;

fig. 7 is a perspective view of a second ladder section in an embodiment of the present invention;

fig. 8 is a front view of a first ladder section in an embodiment of the present invention;

FIG. 9 is a cross-sectional view corresponding to section C-C in FIG. 6;

fig. 10 is a partially enlarged view of portion D of fig. 7.

In the above drawings: 1. a first ladder section; 2. a second ladder section; 3. a pedal; 4. a left ladder leg; 4a, a left ladder leg of the first ladder section; 4b, a left ladder leg of the second ladder section; 5. a right ladder leg; 5a, a right ladder leg of the first ladder section; 5b, a right ladder leg of the second ladder section; 6. a rod body; 7. a rod cap; 8. a step; 9. a locking hole; 9 a. upper locking hole; 9b, lower locking hole; 10. a lock pin; 11. a spring; 12. a limit rivet; 13. an anti-slip rubber pad; 14. a first limit plate; 15. a second limiting plate; 16. a third limiting plate; 17. a fourth limiting plate; 18. connecting blocks; 19. fixing the rivet; 20. and connecting rivets.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

example (b): the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure may be shown and described, and which, when modified and varied by the techniques taught herein, can be made by those skilled in the art without departing from the spirit and scope of the disclosure.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms "a", "an", "the" and "the", as used herein, also include the plural forms.

The terms "first," "second," and the like, as used herein, do not denote any order or importance, nor do they denote any order or importance, but rather are used to distinguish one element from another element or operation described in such technical terms.

As used herein, "connected" or "positioned" refers to two or more elements or devices being in direct physical contact with each other or in indirect physical contact with each other, and may also refer to two or more elements or devices being in operation or acting on each other.

As used herein, the terms "comprising," "including," "having," and the like are open-ended terms that mean including, but not limited to.

As used herein, the term (terms), unless otherwise indicated, shall generally have the ordinary meaning as commonly understood by one of ordinary skill in the art, in this written description and in the claims. Certain words used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the disclosure.

The terms "front", "rear", "upper", "lower", "left" and "right" used herein are directional terms, and are used only for describing the positional relationship between the structures, and are not intended to limit the specific direction of the protective reaction and the practical implementation of the present invention.

Example (b): referring to fig. 1 to 10, a portable hanging ladder comprises a first ladder section 1 and a second ladder section 2;

the first ladder section 1 and the second ladder section 2 are attached to each other in a front-back manner and are connected in a relative sliding manner, and in the sliding process, the first ladder section 1 and the second ladder section 2 are in a relatively contracted state and a relatively expanded state; the first ladder section 1 and the second ladder section 2 both comprise ladder legs arranged at two sides and a plurality of pedals 3 fixedly arranged between the ladder legs at the two sides;

the relative direction of definition both sides ladder leg is left right direction, and the slip direction of first ladder section 1 and second ladder section 2 is upper and lower direction, and first ladder section 1 is located the place ahead of second ladder section 2, and second ladder section 2 is located the rear of first ladder section 1.

The pedals 3, the left ladder leg 4 and the right ladder leg 5 are all of hollow structures, and two end parts of each pedal 3 are connected with the left ladder leg 4 or the right ladder leg 5 through reinforcing structures;

the reinforcing structure comprises a connecting block 18, a fixing rivet 19 and a connecting rivet 20; the connecting block 18 is columnar, and the fixing rivet 19 penetrates through the connecting block 18 along the left-right direction to be fixedly connected with the ladder leg; two fixing rivets 19 are arranged in each connecting block 18 in a penetrating way, and the two rivets are arranged in tandem; both ends of the pedal 3 are sleeved on the connecting block 18, and both ends of the pedal 3 are fixedly connected with the connecting block 18 through the connecting rivets 20, so that the pedal 3 is fixedly connected between the left ladder leg 4 and the right ladder leg 5.

A first limiting plate 14 is fixed at the upper end of the left ladder leg 4a of the first ladder section, and a second limiting plate 15 is fixed at the upper end of the right ladder leg 5a of the first ladder section;

a third limiting plate 16 is fixed at the lower end of the left ladder leg 4b of the second ladder section, a limiting rivet 12 is fixed at the upper end of the left ladder leg 4, a fourth limiting plate 17 is fixed at the lower end of the right ladder leg 5b of the second ladder section, and a limiting rivet 12 is fixed at the upper end of the right ladder leg 5; first limiting plate 14, second limiting plate 15, third limiting plate 16 and fourth limiting plate 17 are L-shaped structure, have two sides of mutually perpendicular, wherein:

one side surface of the first limiting plate 14 is attached to the left side surface of the upper end of the left ladder leg 4a of the first ladder section, the other side surface of the first limiting plate 14 is arranged at the rear side of the first limiting plate 14 and is arranged at a front-rear interval with the left ladder leg 4a of the first ladder section, and the left ladder leg 4b of the second ladder section is arranged in the interval in a sliding manner; one side surface of the second limiting plate 15 is attached to the right side surface of the upper end of the right ladder leg 5a of the first ladder section, the other side surface of the second limiting plate 15 is arranged at the rear side of the second limiting plate 15 and is arranged at a front-rear interval with the right ladder leg 5a of the first ladder section, and the right ladder leg 5b of the second ladder section is arranged in the interval in a sliding manner; one side surface of the third limiting plate 16 is attached to the left side surface of the lower end of the left ladder leg 4b of the second ladder section, the other side surface of the third limiting plate 16 is arranged on the front side of the third limiting plate 16 and is arranged at a front-back interval with the left ladder leg 4b of the second ladder section, and the left ladder leg 4a of the first ladder section is arranged in the interval in a sliding manner; one side surface of the fourth limiting plate 17 is attached to the right side surface of the lower end of the right ladder leg 5b of the second ladder section, the other side surface of the fourth limiting plate 17 is arranged on the front side of the fourth limiting plate 17 and is arranged at a front-back interval with the right ladder leg 5b of the second ladder section, and the right ladder leg 5a of the first ladder section is arranged in the interval in a sliding manner;

therefore, under the relative sliding state of the first ladder section 1 and the second ladder section 2, the first ladder section 1 is limited by the third limiting plate 16 and the fourth limiting plate 17 on the second ladder section 2 and cannot move left and right relative to the second ladder section 2; the second ladder section 2 is limited by a first limit plate 14 and a second limit plate 15 on the first ladder section 1 and cannot move left and right relative to the first ladder section 1; the first limiting plate 14 and the third limiting plate 16 are limited in the vertical direction, the second limiting plate 15 and the fourth limiting plate 17 are limited in the vertical direction, when the first ladder section 1 and the second ladder section 2 are far away from each other in the vertical direction and slide until the first limiting plate 14 and the third limiting plate 16 are contacted with each other, and when the second limiting plate 15 and the fourth limiting plate 17 are contacted with each other, the first ladder section 1 and the second ladder section 2 cannot continuously move away from each other in the vertical direction and slide; when first ladder section 1 and second ladder section 2 are close to each other from top to bottom and slide, until first limiting plate 14 upper end and the contact of spacing rivet 12 of second ladder section 2 left side ladder leg 4, when second limiting plate 15 upper end and the contact of spacing rivet 12 of second ladder section 2 right side ladder leg 5, first ladder section 1 just can't continue to be close to each other along upper and lower direction with second ladder section 2.

The upper ends of a left ladder leg 4a and a right ladder leg 5 of the first ladder section are respectively provided with a lock pin 10 assembly, each lock pin 10 assembly comprises a lock pin 10 and a spring 11, each lock pin 10 is provided with a rod body 6, each rod body 6 penetrates through the corresponding ladder leg in the front-back direction, the front end of each rod body 6 is fixedly provided with a rod cap 7, each rod cap 7 is positioned outside the front side of each ladder leg, the rear end of each rod body 6 is provided with a step 8, each step 8 is positioned outside the rear side of each ladder leg, the diameter of each step 8 is larger than that of each rod body 6, one end of each spring 11 acts on each step 8, the other end of each spring 11 acts on the inner wall of each ladder leg, force in the front-back direction is applied to each lock pin 10, and the rear end of each rod body 6 of each lock pin 10 is always exposed on the rear side face of the left ladder leg 4 or the right ladder leg 5 under the condition that the spring 11 is only applied;

an upper locking hole 9 and a lower locking hole 9 are uniformly formed in the left ladder leg 4b and the right ladder leg 5 of the second ladder section, and the diameter of each locking hole 9 is equal to that of the corresponding ladder 8;

when the first ladder section 1 and the second ladder section 2 are in a relatively contracted state, the lock pin 10 on the left ladder leg 4a of the first ladder section is inserted into the lower locking hole 9 of the left ladder leg 4b of the second ladder section under the action of the spring 11 of the lock pin, the lock pin 10 on the right ladder leg 5a of the first ladder section is inserted into the lower locking hole 9 of the right ladder leg 5b of the second ladder section under the action of the spring 11 of the lock pin, and the first ladder section 1 and the second ladder section 2 are in a relatively positioned state; during unlocking, an operator applies force in the front-back direction to the lock pins 10 on the first ladder section 1, so that the two lock pins 10 overcome the elastic force of the spring 11 and are separated from the lower locking holes 9 of the second ladder section 2, and unlocking is realized so as to be unfolded;

when the first ladder section 1 and the second ladder section 2 are in a relatively unfolded state, the lock pin 10 on the left ladder leg 4a of the first ladder section is inserted into the upper lock hole 9 of the left ladder leg 4b of the second ladder section under the action of the spring 11 of the lock pin, the lock pin 10 on the right ladder leg 5a of the first ladder section is inserted into the upper lock hole 9 of the right ladder leg 5b of the second ladder section under the action of the spring 11 of the lock pin, and the first ladder section 1 and the second ladder section 2 are in a relatively positioned state; when unlocking, an operator applies force in the front-back direction to the two lock pins 10 on the first ladder section 1, so that the two lock pins 10 overcome the elastic force of the spring 11 and are separated from the upper locking hole 9 of the second ladder section 2, and unlocking is realized so as to be contracted.

Preferably, the upper and lower ends of the first ladder section 1 and the second ladder section 2 are both provided with anti-skid rubber pads 13.

Other embodiments and structural changes of the present invention are described below as follows:

1. in the above embodiments, the second ladder section 2 limits the first limit plate 14 on the first ladder section 1 through the third limit plate 16 and the limit rivet 12, the second ladder section 2 limits the second limit plate 15 on the first ladder section 1 through the fourth limit plate 17 and the limit rivet 12, the limit rivets 12 can be used on the second ladder section 2 to limit the first limit plate 14 and the second limit plate 15, the third limit plate 16 and the fourth limit plate 17 can be arranged on the second ladder section 2, the second ladder section 2 is attached to the first ladder section 1, and carry on spacingly to third limiting plate 16 and fourth limiting plate 17 through spacing rivet 12 on first ladder section 1, as long as with second ladder section 2 and the laminating of first ladder section 1 and carry out the spacing structure of slip, all should be contained the utility model discloses in, this is that technical person in the art can understand and accept.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A telescopic straight ladder is characterized in that:

comprises a first ladder section (1) and a second ladder section (2); the first ladder section (1) and the second ladder section (2) respectively comprise a left ladder leg (4), a right ladder leg (5) and a plurality of pedals (3) connected between the ladder legs at two sides;

the first ladder section (1) and the second ladder section (2) are attached to each other in a front-back mode and are connected in a vertical sliding mode, and in the sliding process, the first ladder section (1) and the second ladder section (2) are in a relatively contracted state and a relatively expanded state;

a first limiting plate (14) and a second limiting plate (15) are arranged on the first ladder section (1);

the first limiting plate (14) and the second limiting plate (15) are both L-shaped claw-shaped structures;

the first limiting plate (14) is fixedly arranged at the upper end of the left ladder leg (4 a) of the first ladder section on one hand, and hooks the left ladder leg (4 b) of the second ladder section on the other hand, so that the left ladder leg (4 a) of the first ladder section and the left ladder leg (4 b) of the second ladder section are attached to each other;

the second limiting plate (15) is fixedly arranged at the upper end of the right ladder leg (5 a) of the first ladder section on one hand, and hooks the right ladder leg (5 b) of the second ladder section on the other hand, so that the right ladder leg (5 a) of the first ladder section and the right ladder leg (5 b) of the second ladder section are attached to each other;

the upper end and the lower end of the second ladder section (2) are provided with limiting structures corresponding to the first limiting plate (14) and the second limiting plate (15);

in the relative contraction state, the first limiting plate (14) and the second limiting plate (15) are limited at the upper end of the second ladder section (2) by the limiting structure;

in the relative unfolding state, the first limiting plate (14) and the second limiting plate (15) are limited at the lower end of the second ladder section (2) by the limiting structures;

the first ladder section (1) is provided with a lock pin assembly, and the second ladder section (2) is provided with a lock hole (9) matched with the lock pin assembly, so that the first ladder section (1) and the second ladder section (2) are kept in a relatively contracted state or a relatively expanded state.

2. The telescopic ladder of claim 1, wherein: the limiting structure comprises a third limiting plate (16), a fourth limiting plate (17) and a limiting rivet (12);

the third limiting plate (16) and the fourth limiting plate (17) are both L-shaped claw-shaped structures;

the third limiting plate (16) is fixedly arranged at the lower end of the left ladder leg (4 b) of the second ladder section on one hand, and hooks the left ladder leg (4 a) of the first ladder section on the other hand, so that the upper end limit of the first limiting plate (14) is formed;

the fourth limiting plate (17) is fixedly arranged at the lower end of the right ladder leg (5 b) of the second ladder section on one hand, and hooks the right ladder leg (5 a) of the first ladder section on the other hand, so that the upper end limit of the second limiting plate (15) is formed, and then the third limiting plate (16) and the fourth limiting plate (17) are matched to form the upper end limit of the second ladder section (2);

the upper ends of the left ladder leg (4 b) and the right ladder leg (5 b) of the second ladder section are respectively fixed with the limiting rivet (12), so that the lower end of the second ladder section (2) is limited.

3. The telescopic ladder of claim 1, wherein: the pedals (3), the left ladder leg (4) and the right ladder leg (5) are all of hollow structures, and two ends of each pedal (3) are connected with the left ladder leg (4) or the right ladder leg (5) through reinforcing structures;

the reinforcing structure comprises a connecting block (18), a fixing rivet (19) and a connecting rivet (20); the connecting blocks (18) are columnar, and the fixing rivets (19) penetrate through the connecting blocks (18) along the left and right directions to be fixedly connected with the ladder legs; two fixing rivets (19) are arranged in each connecting block (18) in a penetrating way, and the two rivets are arranged in tandem; footboard (3) both ends are all established on connecting block (18), and footboard (3) both ends are passed through connect rivet (20) and connecting block (18) fixed connection to this constitutes footboard (3) fixed connection between left side ladder leg (4) or right side ladder leg (5).

4. The telescopic ladder of claim 1, wherein: the lock pin assembly of the first ladder section (1) comprises a lock pin (10) and a spring (11), the lock pin (10) is provided with a rod body (6), the rod body (6) penetrates through ladder legs along the front-back direction, a rod cap (7) is fixedly arranged at the front end of the rod body (6), the rod cap (7) is positioned outside the front side of the ladder legs, a step (8) is arranged at the rear end of the rod body (6), the step (8) is positioned outside the rear side of the ladder legs, the diameter of the step (8) is larger than that of the rod body (6), one end of the spring (11) acts on the step (8), and the other end of the spring acts on the inner wall of the ladder legs, so that a force along the front-back direction is applied to the lock pin (10);

an upper locking hole (9 a) and a lower locking hole (9 b) are arranged on the ladder leg of the second ladder section, and the diameters of the upper locking hole (9 a) and the lower locking hole (9 b) are equal to the diameter of the ladder (8) on the rod body (6).

5. The telescopic ladder of claim 1, wherein: the upper end and the lower extreme of left side ladder leg (4 a) of first ladder section, right side ladder leg (5 a) of first ladder section, left side ladder leg (4 b) of second ladder section and right side ladder leg (5 b) of second ladder section all are equipped with anti-skidding cushion (13).