CN220487471U - Folding board-turning ladder - Google Patents

Abstract

A foldable flap ladder having an open state and a folded state; comprises a main ladder frame, a support frame and a pedal, wherein the pedal is in an open state and an upward folding state, and in the folding state, the pedal is positioned on an extension line at the upper end of the support frame; the folding type folding ladder further comprises a first locking structure which is arranged at the hinge position corresponding to the pedal and the main ladder frame and used for locking the pedal in an open state, and a second locking structure which is arranged at the same side part corresponding to the main ladder frame and the supporting frame and used for locking the folding state of the turnover ladder; the second locking structure is arranged on the side parts of the main ladder frame and the supporting frame, is low in height, has no requirement on the height of a user, and is more convenient for the actual operation of the user. Besides, the second locking structure enables the main ladder frame and the supporting frame to be attached more firmly and compactly, and collision noise and loosening phenomena between the main ladder frame and the supporting frame are avoided.

Description

Folding board-turning ladder

Technical Field

The utility model relates to a climbing appliance, in particular to a foldable turnover plate ladder.

Background

The turning plate ladder is a self-standing aluminum alloy herringbone ladder with single-side climbing, has a light structure, is a common household ladder, and is used for climbing up and placing articles at high positions or repairing lamps, ceiling fans and the like.

The prior turning plate ladder comprises a main ladder frame, a support frame, a top pedal and a locking structure, wherein the main ladder frame and the support frame are respectively hinged with the top pedal, and the locking structure is positioned below the top pedal relatively and used for adjusting and locking the open state or the folding state of the top pedal. The locking structure comprises a locking needle, a first locking hole and a second locking hole are formed in the hinged position of the top pedal and the main ladder frame, when the locking needle is inserted into the first locking hole, the locking needle corresponds to the open state of the top pedal, and when the locking needle is inserted into the second locking hole, the locking needle corresponds to the folding state of the top pedal. In long-term practical use it was found that:

1. when the turning plate ladder is in a folding state, the top pedal is turned upwards, and when the turning plate ladder is required to be adjusted to an opening state, the locking structure on the top pedal is required to be operated, so that the locking needle is inserted into the first locking hole, but when the pedal ladder is in the folding state, the locking structure on the top pedal is as high as 1.8 meters or more from the ground, so that an operator is required to have higher height or the ladder can be opened by means of tools of other stools, and the complexity of the operation process is increased.

2. Because the lock needle of the locking structure can be freely inserted into or retracted from the locking hole, the outer diameter of the lock needle is smaller than the aperture of the locking hole, and in the folded state, a gap is formed between the lock needle and the locking hole, and the gap causes that the main ladder frame and the support frame cannot be kept in a tightly attached state in the folded state, collision sound of bang between the main ladder frame and the support frame can occur, and the using feeling of a user is influenced.

Therefore, how to solve the above-mentioned drawbacks of the prior art is a subject to be studied and solved by the present utility model.

Disclosure of Invention

The utility model aims to provide a foldable turnover ladder.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a foldable flap ladder having an open state and a folded state; comprising

A main ladder frame in a straight ladder state;

the support frame is in a straight line state;

the pedal is combined with the tops of the main ladder frame and the support frame, is hinged with the main ladder frame and the support frame respectively, has a downward horizontal opening state and an upward folding state, and is positioned on an extension line of the upper end of the support frame when in the folding state;

the first locking structure is arranged at the hinge position of the corresponding pedal and the main ladder frame and comprises an elastic locking piece, a locking hole is formed at the hinge position of the pedal and the main ladder frame, and when the elastic locking piece is inserted into the locking hole, the pedal is locked in an open state;

the second locking structure is arranged corresponding to the same side parts of the main ladder frame and the supporting frame and used for locking the folding state of the turning plate ladder and comprises a locking piece, and two ends of the locking piece are respectively connected with the main ladder frame and the supporting frame.

In the scheme, when the flap ladder is used when being opened, the pedal rotates downwards to be in a horizontal state, and then the elastic locking piece of the first locking structure is inserted into the locking hole, so that the pedal is locked in an opened state; when the board ladder is folded, the elastic locking piece breaks away from the locking hole, the locking of the pedal opening state is released, then the pedal is turned upwards, the pedal is enabled to rotate to the extension line of the upper end of the support frame, the main ladder frame is close to and attached to the support frame in the process, and then the locking of the attaching state of the main ladder frame and the support frame is achieved through the second locking structure of the side part of the main ladder frame and the support frame, because the second locking structure is arranged on the side part of the main ladder frame and the support frame, the height is low, no requirement is made on the height of an operator, and the operation is more convenient and labor-saving. In addition, the second locking structure keeps the close fitting state of the first locking structure and the second locking structure, so that gaps are not easy to occur between the first locking structure and the second locking structure, and rattle cannot occur due to collision.

In the above scheme, the locking piece can be an elastic rubber ring, a connecting chain or a buckle structure.

According to a further technical scheme, the first end of the locking piece is hinged with the main ladder frame, and the second end of the locking piece is connected with the supporting frame in a buckling mode. The second locking structure further comprises a first positioning lug arranged on the side part of the support frame; the locking piece is a connecting piece, a notch is formed in the connecting piece, the connecting piece is rotated, the notch downwards clamps the first positioning protruding block, and then the main ladder frame is locked in a state of being attached to the supporting frame.

According to a further technical scheme, the second locking structure further comprises an elastic limiting piece, wherein the elastic limiting piece is connected to the outer side of the connecting piece, and a yielding space is formed outwards at the position corresponding to the notch; the elastic limiting piece is provided with a bulge, the bulge is positioned below the yielding space and faces the yielding space, and when the first positioning lug is positioned in the notch, the bulge is abutted upwards against the first positioning lug to form secondary locking on the first positioning lug; the elastic limiting piece is shifted outwards, and the protrusion releases the locking of the first positioning protruding block. The inner edge through the breach supports from the top down and leans on first positioning lug like this, and protruding upwards extrudees first top lug from the bottom, and double locking makes the second end of connection piece more fastening with the support frame connection, makes the laminating of main ladder frame and support frame more firm, turns over the board ladder under the transport folding condition, turns over the board ladder and can not scatter more can not send the sound of collision.

In the above technical solution, the elastic limiting piece may be a spring piece made of elastic material, or may be a combination of a sheet made of inelastic material and a spring, where one end of the spring abuts against the connecting piece, and the other end abuts against the sheet, so that the sheet maintains a movement trend of moving inwards, even if the bump maintains a trend of abutting against the positioning bump upwards.

According to a further technical scheme, the side part of the main ladder frame is also provided with a second positioning lug, so that when the turnover ladder is in an open state, the second positioning lug is clamped into a notch on the connecting sheet, and the connecting sheet is fixed. Therefore, when the turning plate ladder is in an open state, the connecting sheet is positioned on the ladder column of the main ladder frame, and swinging and shaking cannot occur.

According to a further technical scheme, the elastic locking piece comprises a positioning seat fixedly connected with the pedal, a locking needle and a spring, wherein the locking needle is arranged corresponding to the positioning seat; one end of the spring is in abutting fit with the lock needle, and the other end of the spring is in abutting fit with the positioning seat, so that the head of the lock needle keeps a movement trend of extending outwards into the locking hole; the lock needle is also provided with an operating handle, and the operating handle is operated to drive the lock needle to retract inwards so as to unlock the lock to the locking hole.

According to a further technical scheme, the main ladder frame comprises a left ladder column and a right ladder column and a pedal rod arranged between the two ladder columns; the support frame comprises a left support column and a right support column and a crosspiece arranged between the two support columns; the turning plate ladder also comprises a supporting piece which is arranged between the main ladder frame and the supporting frame and used for supporting the turning plate ladder in an open state, and two ends of the supporting piece are respectively connected with the pedal rod and the crosspiece; when the support piece is opened for use, one branch support is added, and one protection is added at the same time; under the folding state of the turning plate ladder, the supporting piece gives way to the main ladder frame and the supporting frame, so that the main ladder frame is completely attached to the supporting frame, the whole storage volume of the turning plate ladder is reduced to the greatest extent, the daily storage of a user is facilitated, the boxing rate of a manufacturer during shipment is improved, and the transportation cost is reduced.

In the above technical solution, the supporting member may be a chain, or may be a rod, or may be another connecting member having strength.

Further technical scheme, support piece includes head rod and second connecting rod, and the first end of head rod is articulated with the pedal rod, and the second end is fixed connection with the first end of second connecting rod, and the second end of second connecting rod is articulated with the crosspiece.

According to a further technical scheme, the supporting frame and the ground form an included angle alpha in the front-rear direction, and the included angle alpha is 80-85 degrees. Because the support frame generally needs to be close to the goods shelf, under the condition of guaranteeing the overall stability of the turning plate ladder, the larger the angle is, the closer the support frame is to the goods shelf, and the more convenient the goods can be loaded and unloaded.

According to a further technical scheme, an included angle beta is formed between the main ladder frame and the ground in the front-rear direction, and the included angle beta is 60-75 degrees. The larger the angle is, the smaller the capability of bearing the interference force from the outside left and right is, and the toppling is easy; the smaller the angle, the less weight the climber is born.

Due to the application of the technical scheme, compared with the prior art, the utility model has at least the following advantages:

1. after the turning plate ladder is folded, the main ladder frame is kept in a state of being attached to the support frame through the second locking structure arranged on the side parts of the main ladder frame and the support frame, and the turning plate ladder is arranged on the side parts of the main ladder frame and the support frame, so that the height is low, the requirement on the height of a user is avoided, and the actual operation of the user is facilitated.

2. The inner edge of the notch in the second locking structure is abutted against the first positioning lug from top to bottom, the first top lug is extruded from bottom to top by the bulge, and double locking is carried out, so that the second end of the connecting sheet is connected with the supporting frame more firmly, the joint of the main ladder frame and the supporting frame is firmer and more compact, the flap ladder in the carrying folding state can not scatter and can not generate collision sound.

Drawings

Fig. 1 is a schematic structural view of a turnover ladder in an opened state according to an embodiment of the present utility model;

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

fig. 3 is a schematic structural view of an opened state of the flap ladder in a side view of the embodiment of the utility model;

FIG. 4 is an enlarged view of FIG. 3 at B;

fig. 5 is a schematic structural view of the embodiment of the utility model in a folded state of the flap ladder;

FIG. 6 is an enlarged view at C of FIG. 5;

fig. 7 is a schematic structural diagram of a folding state of the flap ladder in a side view of the embodiment of the utility model;

fig. 8 is an enlarged view of fig. 7 at D.

In the above figures: 1. a main ladder frame; 2. a support frame; 3. a pedal; 4. a locking hole; 5. a first positioning bump; 6. a connecting sheet; 7. a notch; 8. an elastic limit piece; 9. a protrusion; 10. a second positioning bump; 11. a positioning seat; 12. locking the needle; 13. a spring; 14. an operation handle; 15. a ladder column; 16. a pedal rod; 17. a crosspiece; 18. a support column; 19. a first connecting rod; 20. a second connecting rod; 21. and a second hinge piece.

Description of the embodiments

The utility model is further described below with reference to the accompanying drawings and examples:

examples: the present utility model will be described in detail with reference to the drawings, wherein modifications and variations are possible in light of the teachings of the present utility model, without departing from the spirit and scope of the present utility model, as will be apparent to those of skill in the art upon understanding the embodiments of the present utility model.

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

The terms "first," "second," and the like, as used herein, do not denote a particular order or sequence, nor are they intended to be limiting, but rather are merely used to distinguish one element or operation from another in the same technical term.

As used herein, "connected" or "positioned" may refer to two or more components or devices in physical contact with each other, or indirectly, or in operation or action with each other.

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

The term (terms) as used herein generally has the ordinary meaning of each term as used in this field, in this disclosure, and in the special context, unless otherwise noted. Certain terms used to describe the present disclosure are discussed below, or elsewhere in this specification, to provide additional guidance to those skilled in the art in connection with the description herein.

The terms "front", "rear", "upper", "lower", "left", "right" and the like used herein are directional terms, and are merely used to describe positional relationships among the structures in the present application, and are not intended to limit the present protection scheme and the specific direction in actual implementation.

Referring to fig. 1-8, a foldable flap ladder having an open position and a folded position; comprises a main ladder frame 1 arranged on the front side, a supporting frame 2 arranged on the rear side and a pedal 3 combined with the upper ends of the main ladder frame 1 and the supporting frame 2; the main ladder frame 1 is in a ladder-shaped state and comprises a left ladder column 15, a right ladder column 15 and a pedal rod 16 arranged between the two ladder columns 15; the support frame 2 is in a straight line state and comprises a left support column 18 and a right support column 18, and a crosspiece 17 arranged between the two support columns 18; the pedal 3 is hinged with the support frame 2 through a first hinge piece, the pedal 3 is hinged with the main ladder frame 1 through a second hinge piece 21, the pedal 3 has a downward horizontal opening state and an upward folding state, and in the folding state, the pedal 3 is positioned on an extension line of the upper end of the support frame 2.

The turning plate ladder further comprises a first locking structure, the hinge part corresponding to the pedal 3 and the main ladder frame 1 comprises an elastic locking piece, a locking hole 4 is formed in the second hinge piece 21, and when the elastic locking piece is inserted into the locking hole 4, locking of the pedal 3 in an open state is achieved.

The elastic locking piece comprises a positioning seat 11 fixedly connected with the pedal 3, a locking needle 12 arranged corresponding to the positioning seat 11 and a spring 13; the positioning seat 11 is hidden on the lower surface of the pedal 3, two through holes for inserting the locking needle 12 are formed in the left-right direction, the locking needle 12 is slidably arranged on the positioning seat 11 through the two through holes, an inclined surface is further arranged on the positioning seat 11, an operating handle 14 is arranged on the locking needle 12 corresponding to the inclined surface 12, the operating handle 14 is extruded upwards, the operating handle 14 moves inwards along the inclined surface, and the locking needle 12 is driven to move inwards. The spring 13 is sleeved on the lock needle 12, one end of the spring 13 is in abutting fit with the lock needle 12 through a limiting ring, the other end of the spring 13 is in abutting fit with the positioning seat 11, the head of the lock needle 12 further keeps a movement trend of extending outwards into the locking hole 4, during unlocking, the operating handle 14 is pressed upwards, the operating handle 14 is enabled to displace inwards against the elastic force of the spring 13, the lock needle 12 is driven to retract inwards to displace, and the head of the lock needle 12 is formed to be separated from the limiting hole 4, so that unlocking of the lock needle 12 to the locking hole 4 is achieved.

The turning plate ladder further comprises a second locking structure, is arranged corresponding to the same side part of the main ladder frame 1 and the supporting frame 2 and is used for locking the folding state of the turning plate ladder, and comprises a locking piece, wherein two ends of the locking piece are respectively connected with the ladder column 15 of the main ladder frame 1 and the supporting column 18 of the supporting frame 2.

The first end of the locking piece is hinged with the main ladder frame 1, and the second end of the locking piece is connected with the support frame 2 in a buckling manner; the second locking structure further comprises a first positioning lug 5 arranged on the support column 18; the locking piece is a connecting piece 6, a notch 7 is formed in the connecting piece 6, and the connecting piece 6 is rotated, so that the notch 7 downwards clamps the first positioning protruding block 5, and further, the state locking of the main ladder frame 1 attached to the support frame 2 is realized.

In order to firmly connect the second end of the connecting piece 6 with the supporting column 18, the second locking structure further comprises an elastic limiting piece 8, wherein the elastic limiting piece 8 is connected to the outer side of the connecting piece 6, and a yielding space is formed outwards at the position corresponding to the notch 7; the elastic limiting piece 8 is provided with a bulge 9, the bulge 9 is positioned below the yielding space and faces the yielding space, and when the first positioning convex block 5 is positioned in the notch 7, the bulge 9 is propped against the first positioning convex block 5 upwards to form secondary locking of the first positioning convex block 5; the elastic limiting piece 8 is shifted outwards, and the protrusion 9 releases the locking of the first positioning protruding block 5.

The lateral part of main ladder frame 1 still is equipped with second positioning lug 10, constitutes when turning over the board ladder open mode, and second positioning lug 10 card is gone into in the breach 7 on the connection piece 6, realizes fixing to connection piece 6, avoids connection piece 6 rocking back and forth.

The turning plate ladder also comprises a supporting piece which is arranged between the main ladder frame 1 and the supporting frame 2 and used for supporting the turning plate ladder in an open state, and two ends of the supporting piece are respectively connected with the pedal rod 16 and the crosspiece 17; under the folding state of the turning plate ladder, the supporting piece gives way to the main ladder frame 1 and the supporting frame 2, so that the main ladder frame 1 is completely attached to the supporting frame 2. The support member comprises a first connecting rod 19 and a second connecting rod 20, wherein the first end of the first connecting rod 19 is hinged with the pedal rod 16, the second end of the first connecting rod is fixedly connected with the first end of the second connecting rod 20, and the second end of the second connecting rod 20 is hinged with the crosspiece 17. In order to make the opening state of the turnover ladder more stable, the two connecting rods form an obtuse angle at the joint of the two connecting rods, so that a downward component force can be formed on the two connecting rods.

The supporting frame 2 forms an included angle alpha with the ground in the front-rear direction, the included angle alpha is 80-85 degrees, and the larger the angle is, the closer the supporting frame 2 is to a goods shelf, the more convenient goods loading and unloading are.

An included angle beta is formed between the main ladder frame 1 and the ground in the front-rear direction, the included angle beta is 60-75 degrees, the larger the angle is, the smaller the capability of bearing the external left-right interference force is, and the main ladder frame is easy to topple; the smaller the angle, the less weight the climber is born.

According to the above structural composition, the specific working principle of the utility model is now described as follows:

when the turning plate ladder is opened, the elastic limiting piece 8 is firstly stirred outwards, the connecting piece 6 is rotated, the first positioning protruding block 10 is separated from the notch 7, unlocking of the attaching state of the main ladder frame 1 and the supporting frame 2 is achieved, then the main ladder frame 1 is pulled forwards and downwards, the pedal 3 is located in a horizontal state, when the pedal 3 is located in the horizontal state, two through holes in the positioning seat 11 and the locking hole 4 in the second hinge piece 21 are located in the same straight line, under the action of elastic force of the spring 13, the locking needle 12 is displaced outwards, and the head of the locking needle 12 stretches into and stretches out of the locking hole 4, so that locking of the opening state of the turning plate ladder is achieved.

When the turning plate ladder is folded, the operating handle 14 is extruded upwards, the operating handle 14 overcomes the elastic force of the spring 13 to displace inwards, the lock needle 12 is driven to retract inwards to displace, the head of the lock needle 12 is separated from the limit hole 4, unlocking of the lock needle 12 to the lock hole 4 is achieved, then the main ladder frame 1 is pushed upwards backwards, the pedal 3 is enabled to be overturned upwards to the extension line of the upper end of the support frame 2, the main ladder frame 1 is attached to the support frame 2, then the connecting sheet 6 is rotated, the elastic limit sheet 8 is shifted upwards, the first positioning protruding block 10 is positioned in the notch 7, and finally locking of the folding state is achieved.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (9)

1. A foldable flap ladder, characterized in that: has an open state and a folded state; comprising

A main ladder frame (1) in a ladder-like state;

a support (2) in a straight line state;

the pedal (3) is combined with the tops of the main ladder frame (1) and the support frame (2), is hinged with the main ladder frame (1) and the support frame (2) respectively, has a downward horizontal opening state and an upward folding state, and is positioned on an extension line at the upper end of the support frame (2) when in the folding state;

the first locking structure is arranged at the hinge position of the corresponding pedal (3) and the main ladder frame (1) and comprises an elastic locking piece, a locking hole (4) is formed at the hinge position of the pedal (3) and the main ladder frame (1), and when the elastic locking piece is inserted into the locking hole (4), the locking of the opening state of the pedal (3) is realized;

the second locking structure is arranged corresponding to the same side part of the main ladder frame (1) and the supporting frame (2) and is used for locking the folding state of the turning plate ladder, and comprises a locking piece, wherein two ends of the locking piece are respectively connected with the main ladder frame (1) and the supporting frame (2).

2. The foldable flap ladder of claim 1, wherein: the first end of the locking piece is hinged with the main ladder frame (1), and the second end of the locking piece is in buckling connection with the supporting frame (2);

the second locking structure also comprises a first positioning lug (5) arranged at the side part of the supporting frame (2);

the locking piece is a connecting piece (6), a notch (7) is formed in the connecting piece (6), the connecting piece (6) is rotated, the notch (7) is downwards clamped with the first positioning protruding block (5), and then the state locking of the main ladder frame (1) attached to the supporting frame (2) is achieved.

3. The foldable flap ladder of claim 2, wherein: the second locking structure further comprises an elastic limiting piece (8), wherein the elastic limiting piece (8) is connected to the outer side of the connecting piece (6), and a yielding space is formed outwards at the position corresponding to the notch (7);

the elastic limiting piece (8) is provided with a bulge (9), the bulge (9) is positioned below the yielding space and faces the yielding space, and when the first positioning lug (5) is positioned in the notch (7), the bulge (9) upwards abuts against the first positioning lug (5) to form secondary locking of the first positioning lug (5); the elastic limiting piece (8) is shifted outwards, and the protrusion (9) releases the locking of the first positioning protruding block (5).

4. A collapsible flap ladder according to claim 3, characterized in that: the side part of the main ladder frame (1) is also provided with a second positioning lug (10), so that when the turnover ladder is in an open state, the second positioning lug (10) is clamped into a notch (7) on the connecting sheet (6) to fix the connecting sheet (6).

5. The foldable flap ladder of claim 1, wherein: the elastic locking piece comprises a positioning seat (11) fixedly connected with the pedal (3), a locking needle (12) and a spring (13), wherein the locking needle (12) is arranged corresponding to the positioning seat (11); one end of the spring (13) is in abutting fit with the lock needle (12), and the other end of the spring is in abutting fit with the positioning seat (11), so that the head of the lock needle (12) keeps a movement trend of extending outwards into the locking hole (4);

the lock needle (12) is also provided with an operating handle (14), and the operating handle (14) is operated to drive the lock needle (12) to retract inwards so as to unlock the lock needle (12) from the locking hole (4).

6. The foldable flap ladder of claim 1, wherein: the main ladder frame (1) comprises a left ladder column (15) and a right ladder column (15) and a pedal rod (16) arranged between the two ladder columns (15);

the support frame (2) comprises a left support column (18) and a right support column (18), and a crosspiece (17) arranged between the two support columns (18);

the turning plate ladder also comprises a supporting piece which is arranged between the main ladder frame (1) and the supporting frame (2) and used for supporting the turning plate ladder in an open state, and two ends of the supporting piece are respectively connected with the pedal rod (16) and the crosspiece (17); under the folding state of the turning plate ladder, the supporting piece gives way to the main ladder frame (1) and the supporting frame (2), so that the main ladder frame (1) is completely attached to the supporting frame (2).

7. The foldable flap ladder of claim 6, wherein: the support piece comprises a first connecting rod (19) and a second connecting rod (20), wherein the first end of the first connecting rod (19) is hinged with the pedal rod (16), the second end of the first connecting rod (19) is fixedly connected with the first end of the second connecting rod (20), and the second end of the second connecting rod (20) is hinged with the crosspiece (17).

8. The foldable flap ladder of claim 1, wherein: the supporting frame (2) and the ground form an included angle alpha in the front-rear direction, and the included angle alpha is 80-85 degrees.

9. The foldable flap ladder of claim 1, wherein: the main ladder frame (1) forms an included angle beta with the ground in the front-rear direction, and the included angle beta is 60-75 degrees.