Combined ladder

Abstract

The utility model relates to the technical field of combined ladders, and discloses a combined ladder, which comprises a main ladder and an auxiliary ladder assembled on the main ladder, each of the main ladder and the auxiliary ladder comprises two ladder columns and a plurality of pedals assembled between the two ladder columns, each pedal comprises a supporting flat plate, two ends of each supporting flat plate are respectively and fixedly connected with the two ladder columns, and the supporting flat plates are fixedly connected with the two ladder columns. Each ladder column comprises an inner side surface and an outer side surface, the supporting flat plate is inclined to the bottom of the ladder column from the inner side surface to the outer side surface, a supporting frame is arranged on the ladder column of the auxiliary ladder, and a safety buckle is rotationally mounted on the supporting frame; when the support frame is pressed on the pedal of the main ladder, the auxiliary ladder is supported by the main ladder; when the inner side surfaces of the main ladder and the auxiliary ladder are obliquely placed close to the wall surface, the safety catches automatically lock the pedals; when the main ladder and the auxiliary ladder are both vertically placed, the safety buckle automatically unlocks the pedal. The utility model can solve the problems that in the prior art, when feet step on the pedal, pain is caused, the comfort level is low, and the use experience is poor.

Description

Technical Field

[0001] The utility model relates to the technical field of combined ladders, in particular to a combined ladder. Background Art

[0002] At present, in order to facilitate the transportation and use of ladders, most straight ladders and herringbone ladders are designed as combination ladders. The combination ladder can be replaced with a straight ladder or a herringbone ladder according to the actual working environment requirements.

[0003] A multifunctional ladder disclosed in a Chinese patent [publication number: CN201486457U] comprises a main ladder, an auxiliary ladder and a secondary ladder, wherein the main ladder, the auxiliary ladder and the secondary ladder are all composed of two ladder columns and ladder steps connecting the two ladder columns and arranged at intervals, wherein the upper end portion of the main ladder is fixedly connected with a first connecting piece, through which the auxiliary ladder is slidably connected to the main ladder, the upper end portion of the auxiliary ladder is fixedly connected with a second connecting piece, through which the secondary ladder is slidably connected to the auxiliary ladder, and the lower ends of the auxiliary ladder and the secondary ladder are both installed with supporting buckle structures, that is, the multifunctional ladder can be used as both a straight ladder and a herringbone ladder.

[0004] However, when the multifunctional ladder is used, the contact area between the sole of the foot and the pedal is small, and the pressure on the contact position between the sole of the foot and the pedal is large. When the sole of the foot steps on the pedal, it will cause pain, the comfort level is low, and the user experience is poor. In addition, when the main ladder and the auxiliary ladder are used as a font, the safety buckle needs to be manually adjusted, which is more troublesome. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a combination ladder to solve the problems in the prior art that pain will be caused when the soles of the feet step on the pedals, the comfort level is low, the user experience is poor, and when the main ladder and the auxiliary ladder are used as a font, the safety buckle needs to be manually adjusted, which is rather troublesome.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] A combined ladder comprises a main ladder and an auxiliary ladder mounted on the main ladder, wherein the main ladder and the auxiliary ladder each comprise two ladder columns and a plurality of steps mounted between the two ladder columns, wherein the steps comprise a supporting plate, wherein both ends of the supporting plate are respectively fixedly connected to the two ladder columns, wherein the ladder columns comprise an inner side surface and an outer side surface, wherein the supporting plate is arranged inclined from the inner side surface to the outer side surface toward the bottom of the ladder columns, wherein a supporting frame is arranged on the ladder columns of the auxiliary ladder, and a safety buckle is rotatably mounted on the supporting frame;

[0008] When the support frame is pressed onto the pedal of the main ladder, the main ladder supports the auxiliary ladder;

[0009] When the main ladder and the auxiliary ladder are both placed with their inner sides close to the wall and tilted, the safety buckle automatically locks the pedal;

[0010] When the main ladder and the auxiliary ladder are both placed vertically, the safety buckle automatically unlocks the locking of the pedal.

[0011] Furthermore, the pedal also includes a support rod, the support rod is fixedly connected to the support plate, and both ends of the support rod are respectively fixedly connected to two ladder columns.

[0012] Furthermore, a through hole is opened at the position of the ladder column corresponding to the support rod, and both ends of the support rod are inserted into the through hole. Both ends of the support rod are provided with a limiting ring, and the limiting ring includes a limiting surface, and the limiting surface of the limiting ring is in contact with the outer side surface of the ladder column.

[0013] Furthermore, positioning pins are provided at both upper and lower ends of both sides of the support plate, and positioning holes are provided at positions of the ladder columns corresponding to the positioning pins, and the positioning pins are inserted into the positioning holes.

[0014] Furthermore, a plurality of anti-slip convex strips are arranged on the surface of the supporting plate.

[0015] Furthermore, the safety buckle includes a hinged end and a locking end, and the safety buckle is rotatably connected to the support frame through the hinged end. When the main ladder and the auxiliary ladder are both tilted, the locking end is engaged with the pedal.

[0016] Furthermore, a counterweight block is provided at the bottom of the locking end. When the main ladder and the auxiliary ladder are both placed vertically, the counterweight block causes the safety buckle to rotate and causes the locking end to be separated from the pedal.

[0017] Beneficial effects of the utility model:

[0018] 1. The utility model provides a support plate, and the support plate is inclined from the inner side to the outer side toward the bottom of the ladder column. When the user uses it, it can provide a wider support area for the user, reduce the pressure on the sole of the foot, and improve the user's comfort and use experience.

[0019] 2. The utility model can automatically lock the relative position between the main ladder and the auxiliary ladder by providing a support frame and a safety buckle. After use, it can be automatically unlocked, providing a more convenient use experience while ensuring the safety performance of the combined ladder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a combined ladder of the utility model;

[0021] Figure 2 yes Figure 1 A is a schematic diagram of the enlarged structure of the middle part;

[0022] Figure 3 It is a schematic diagram of the split structure of the step and the ladder column in a combination ladder of the utility model;

[0023] Figure 4 It is an enlarged structural schematic diagram of a step and a support frame in a combined ladder of the utility model;

[0024] in,

[0025] 1. Main ladder;

[0026] 2. Auxiliary ladder;

[0027] 3. Ladder column; 31. Inner side surface; 32. Outer side surface; 33. Through hole; 34. Positioning hole;

[0028] 4. pedal; 41. support plate; 411. anti-slip convex strip; 42. support rod; 421. limit ring; 422. limit surface; 423. guide surface; 43. positioning pin;

[0029] 5. Support frame;

[0030] 6. Safety buckle; 61. Articulated end; 62. Lock end; 63. Counterweight;

[0031] 7. Extend the ladder. DETAILED DESCRIPTION

[0032] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0033] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the figures, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] like Figure 1-Figure 4As shown, a combined ladder of the utility model comprises a main ladder 1 and a secondary ladder 2 mounted on the main ladder 1, both the main ladder 1 and the secondary ladder 2 comprise two ladder columns 3 and a plurality of pedals 4 mounted between the two ladder columns 3, the pedals 4 comprise a support plate 41, the two ends of the support plate 41 are respectively fixedly connected to the two ladder columns 3, the ladder columns 3 comprise an inner side surface 31 and an outer side surface 32, when in use, the inner side surface 31 is located on the side close to the wall, and the support plate 41 is inclined from the inner side surface 31 to the outer side surface 32 and arranged toward the bottom of the ladder column. When the user uses it, it can provide the user with a wider support area, reduce the pressure feeling of the soles of the feet, and improve the user's comfort and use experience.

[0035] In this embodiment, the pedal 4 also includes a support rod 42, which is fixedly connected to the support plate 41, and the two ends of the support rod 42 are respectively fixedly connected to the two ladder columns 3, thereby enhancing the strength of the pedal 4 and enabling the pedal 4 to provide a stronger supporting force.

[0036] In this embodiment, a through hole 33 is provided at the position of the ladder column 3 corresponding to the support rod 42, and both ends of the support rod 42 are inserted into the through hole 33. Both ends of the support rod 42 are provided with a limit ring 421, and the limit ring 421 includes a limit surface 422. The limit surface 422 of the limit ring 421 is in contact with the outer side surface 32 of the ladder column 3. By providing the limit ring 421, the axial movement of the support rod 42 is limited. In this embodiment, a guide surface 423 is provided at the outer end of the limit ring 421. During assembly, it is only necessary to force the limit ring 421 of the support rod 42 into the through hole 33 of the ladder column 3, and the installation is simple, convenient and quick. In some other embodiments, the fixed connection between the support rod 42 and the ladder column 3 can also be achieved by bolts, welding, etc.

[0037] In this embodiment, positioning pins 43 are provided at both ends of the upper and lower sides of the support plate 41, and positioning holes 34 are provided at the positions of the ladder column 3 corresponding to the positioning pins 43, and the positioning pins 43 are inserted into the positioning holes 34. The rotation of the support plate 41 is limited by the positioning pins 43, so that it can provide stable support. It should be noted that in this embodiment, the support plate 41, the support rod 42 and the positioning pins 43 are integrally formed, and during the processing, they are turned from a whole piece of profile, which is convenient for processing.

[0038] In this embodiment, a plurality of anti-skid ridges 411 are disposed on the surface of the support plate 41 . The anti-skid ridges 411 can provide greater friction to prevent the sole of the foot from slipping against the pedal 4 .

[0039] In this embodiment, a support frame 5 is provided on the ladder column 3 of the auxiliary ladder 2, and a safety buckle 6 is rotatably mounted on the support frame 5. When the support frame 5 is pressed on the pedal 4 of the main ladder 1, the main ladder 1 supports the auxiliary ladder 2, and the safety buckle 6 locks the pedal 4. By providing the support frame 5 and the safety buckle 6, when the combination ladder is used as a straight ladder, the auxiliary ladder 2 can be pressed on the main ladder 1 through the support frame 5 and locked by the safety buckle 6, thereby ensuring the stability of the combination ladder.

[0040] In this embodiment, the safety buckle 6 includes a hinged end 61 and a locking end 62. The safety buckle 6 is rotatably connected to the support frame 5 through the hinged end 61. When the main ladder 1 and the auxiliary ladder 2 are both placed at an angle, the locking end 62 is engaged with the pedal 4. The main ladder 1 and the auxiliary ladder 2 can be locked by simply rotating the locking end 62 of the safety buckle 6 to engage the locking end 62 with the pedal 4. In other embodiments, the main ladder 1 and the auxiliary ladder 2 can also be locked by a latch, a clamp, etc.

[0041] In this embodiment, a counterweight 63 is provided at the bottom of the lock end 62. When the main ladder 1 and the auxiliary ladder 2 are both placed with the inner side 31 close to the wall, the counterweight 63 rotates the safety buckle 6 and makes the lock end 62 engage with the pedal 4. No manual operation is required, and automatic locking is achieved. When the main ladder 1 and the auxiliary ladder 2 are both placed vertically, the counterweight 63 rotates the safety buckle 6 and makes the lock end 62 disengage from the pedal 4 engaged therewith. By providing the counterweight 63, automatic unlocking is achieved without manual operation.

[0042] In this embodiment, a herringbone ladder can be formed between the main ladder 1 and the auxiliary ladder 2, with the main ladder 1 serving as a support ladder and the auxiliary ladder 2 serving as a climbing ladder. Since the specific structure and implementation method thereof have been fully disclosed in the prior art, they will not be described in detail herein.

[0043] The auxiliary ladder 2 is equipped with an extension ladder 7, which also includes ladder columns 3 and pedals 4. The assembly method between the extension ladder 7 and the auxiliary ladder 2 is the same as the assembly method between the auxiliary ladder 2 and the main ladder 1, so it will not be described in detail.

[0044] The method of using the utility model is as follows:

[0045] When the combination ladder is used as a straight ladder, the auxiliary ladder 2 is pressed onto the pedal 4 of the main ladder 1 through the support frame 5, and then the main ladder 1 and the auxiliary ladder 2 are tilted, and the inner side 31 of the main ladder 1 and the auxiliary ladder 2 is located on the side close to the wall. When the main ladder 1 and the auxiliary ladder 2 are tilted, the counterweight block 63 rotates the safety buckle 6 and makes the locking end 62 engage with the pedal 4, so that the main ladder 1 and the auxiliary ladder 2 are locked.

[0046] After use, when the main ladder 1 and the auxiliary ladder 2 are both placed vertically, the counterweight 63 rotates the safety buckle 6 and disengages the locking end 62 from the pedal 4 engaged therewith, thereby automatically unlocking the main ladder 1 and the auxiliary ladder 2.

[0047] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. A combined ladder, comprising a main ladder (1) and an auxiliary ladder (2) mounted on the main ladder (1), wherein the main ladder (1) and the auxiliary ladder (2) each comprise two ladder posts (3) and a plurality of steps (4) mounted between the two ladder posts (3), characterized in that: The pedal (4) comprises a supporting plate (41), the two ends of the supporting plate (41) are respectively fixedly connected to two ladder columns (3), the ladder column (3) comprises an inner side surface (31) and an outer side surface (32), the supporting plate (41) is arranged to be inclined from the inner side surface (31) to the outer side surface (32) toward the bottom of the ladder column (3), and a supporting frame (5) is arranged on the ladder column (3) of the auxiliary ladder (2), and a safety buckle (6) is rotatably mounted on the supporting frame (5); When the support frame (5) is pressed onto the pedal (4) of the main ladder (1), the main ladder (1) supports the auxiliary ladder (2); When the main ladder (1) and the auxiliary ladder (2) are both placed with their inner sides (31) close to the wall and tilted, the safety buckle (6) automatically locks the pedal (4); When the main ladder (1) and the auxiliary ladder (2) are both placed vertically, the safety buckle (6) automatically unlocks the locked pedal (4).

2. A combination ladder according to claim 1, characterized in that: The pedal (4) further comprises a support rod (42), wherein the support rod (42) is fixedly connected to the support plate (41), and the two ends of the support rod (42) are respectively fixedly connected to the two ladder columns (3).

3. A combination ladder according to claim 2, characterized in that: A through hole (33) is provided at a position of the ladder column (3) corresponding to the support rod (42), and both ends of the support rod (42) are inserted into the through hole (33). Both ends of the support rod (42) are provided with a limiting ring (421), and the limiting ring (421) includes a limiting surface (422). The limiting surface (422) of the limiting ring (421) is in contact with the outer side surface (32) of the ladder column (3).

4. A combination ladder according to claim 1, characterized in that: Positioning pins (43) are provided at both upper and lower ends of both sides of the support plate (41), and positioning holes (34) are provided at positions of the ladder column (3) corresponding to the positioning pins (43), and the positioning pins (43) are inserted into the positioning holes (34).

5. A combination ladder according to claim 1, characterized in that: The surface of the supporting plate (41) is provided with a plurality of anti-slip convex strips (411).

6. A combination ladder according to claim 1, characterized in that: The safety buckle (6) comprises a hinged end (61) and a locking end (62). The safety buckle (6) is rotatably connected to the support frame (5) via the hinged end (61). When the main ladder (1) and the auxiliary ladder (2) are both tilted, the locking end (62) is engaged with the pedal (4).

7. A combination ladder according to claim 6, characterized in that: A counterweight (63) is provided at the bottom of the locking end (62). When the main ladder (1) and the auxiliary ladder (2) are both placed vertically, the counterweight (63) causes the safety buckle (6) to rotate and causes the locking end (62) to separate from the pedal (4).

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