Adjustable hinge structure for bidirectional ladder

Abstract

The utility model relates to the technical field of ladders, in particular to an adjustable hinge structure for a two-way ladder, which comprises a first ladder leg, the first ladder leg is fixedly connected with a hinge piece, the hinge piece is provided with a plurality of positioning holes, the hinge piece is rotatably connected with a second ladder leg, the second ladder leg is provided with a locking hole, and the locking hole is connected with the first ladder leg. One side of the second ladder leg is provided with a locking assembly, the locking assembly is sequentially inserted into the locking hole and the positioning hole, the peripheral wall of the locking assembly abuts against the hole wall of the positioning hole, and the locking assembly abuts against the second ladder leg. The bidirectional ladder has the effect of improving the use convenience of the bidirectional ladder.

Description

Technical Field

[0001] The present application relates to the technical field of ladders, and in particular to an adjustable hinge structure for a bidirectional ladder. Background Art

[0002] As a daily necessity, two-way ladders are widely used in the field of high-altitude operations. They effectively ensure space utilization in both directions and can meet the needs of high-altitude operations through telescopic and folding methods.

[0003] In order to improve the safety during use, the existing two-way ladder has a tight hinge structure of the two ladder legs to reduce the possibility of safety accidents caused by the looseness of the two ladder legs. However, when the two ladder legs are unfolded, some people with weak physical strength need to expend a lot of strength to unfold the two ladder legs, which is time-consuming and labor-intensive to use. Utility Model Content

[0004] In order to improve the convenience of using a two-way ladder, the present application provides an adjustable hinge structure for a two-way ladder.

[0005] The present application provides an adjustable hinge structure for a two-way ladder, which adopts the following technical solution:

[0006] An adjustable hinge structure for a bidirectional ladder comprises a first ladder leg, the first ladder leg is fixedly connected to a hinge, the hinge is provided with a plurality of positioning holes, the hinge is rotatably connected to a second ladder leg, the second ladder leg is provided with a locking hole, a locking assembly is provided on one side of the second ladder leg, the locking assembly is sequentially inserted into the locking hole and the positioning hole, the peripheral wall of the locking assembly abuts against the hole wall of the positioning hole, and the locking assembly abuts against the second ladder leg.

[0007] By adopting the above technical solution, when the two-way ladder needs to be used, the second ladder leg is pulled to make the second ladder leg rotate with the hinge as the rotation center and the first ladder leg as the rotation starting point, the angle between the first ladder leg and the second ladder leg is adjusted to an appropriate angle, and the locking assembly is inserted into the locking hole and the positioning hole in turn to fix the angle between the first ladder leg and the second ladder leg, so that the use and installation of the two-way ladder can be achieved. There is no need to tighten the hinge structure of the first ladder leg and the second ladder leg, so that the first ladder leg and the second ladder leg can be easily unfolded. At the same time, the locking assembly is inserted into the locking hole and the positioning hole to fix the first ladder leg and the second ladder leg. The operation is simple, which improves the convenience of using the two-way ladder.

[0008] Optionally, an elastic member is connected to one end of the locking assembly away from the positioning hole, and one end of the elastic member away from the locking assembly is fixed to the second ladder leg, and the elastic member is in a stretched state.

[0009] By adopting the above technical solution, the elastic member connects the locking assembly to the second ladder leg. When fixing the two-way ladder, there is no need to search for the locking assembly, which reduces time waste and improves the convenience of using the two-way ladder. At the same time, the elastic member is in a stretched state, so that the elastic member has a contraction elastic force, so that the locking assembly and the second ladder leg are offset, the connection structure between the locking assembly and the second ladder leg is strengthened, the possibility of the locking assembly falling off from the locking hole and the positioning hole to cause a safety hazard is reduced, and the safety of using the two-way ladder is improved.

[0010] Optionally, the locking assembly includes a locking rod and a locking head, the locking rod is connected to the locking head, the locking rod is inserted into the positioning hole, and the surrounding wall of the locking rod is abutted against the hole wall of the positioning hole, the locking head is fixed to the elastic member, and the locking head is abutted against the second ladder leg.

[0011] By adopting the above technical solution, the locking head is pulled to adjust the angle between the first ladder leg and the second ladder leg to an appropriate size, the locking head is loosened, the elastic member contracts, and the locking rod is inserted into the locking hole and the positioning hole in sequence, so that the angle position of the first ladder leg and the second ladder leg is fixed, and the elastic member continues to contract so that the locking head is tightly against the second ladder leg, further reducing the possibility of the locking rod detaching from the locking hole and the positioning hole.

[0012] Optionally, a pulling groove is provided on the side wall of the locking head.

[0013] By adopting the above technical solution, when the locking head is lifted, the lifting groove can be used as a lifting point for lifting, thereby improving the convenience of lifting the locking head.

[0014] Optionally, the locking assembly is connected to a limiting member, the limiting member is slidably connected to the second ladder leg, and a sliding direction of the limiting member is consistent with an insertion direction of the locking assembly into the positioning hole.

[0015] By adopting the above technical solution, the limit member guides the insertion direction of the locking assembly, so that the locking rod moves in a certain direction, reducing the possibility of deviation when the locking assembly is inserted into the positioning hole, resulting in difficulty in fixing and wasting time, and improving the insertion speed of the locking assembly.

[0016] Optionally, the hinge is in a disc shape, a peripheral wall of the hinge is provided with a plurality of teeth, the limiting member is inserted between adjacent teeth, and the limiting member abuts against the teeth.

[0017] By adopting the above technical solution, when fixing the angle between the first ladder leg and the second ladder leg, it is necessary to insert the locking assembly into the positioning hole, and the locking assembly and the positioning hole are abutted. While strengthening the fixing structure of the first ladder leg and the second ladder leg, it also makes it more difficult to insert the locking assembly into the positioning hole. Teeth are set on the junction piece. When the positions of the first ladder leg and the second ladder leg are preliminarily determined, the limiting piece is inserted between the adjacent teeth, and the second ladder leg is rotated so that the teeth and the limiting piece are abutted. At this time, the positioning hole and the locking hole are connected, and the locking assembly can be directly inserted into the locking hole and the positioning hole, which shortens the time for inserting the locking assembly into the positioning hole and improves the convenience of using the two-way ladder.

[0018] Optionally, one end of the locking assembly inserted into the positioning hole is in a retracted shape.

[0019] By adopting the above technical solution, the convenience of inserting the locking assembly into the positioning hole is further improved.

[0020] Optionally, the positioning holes are equidistantly arranged in the circumferential direction.

[0021] By adopting the above technical solution, the equidistant circumferentially arranged positioning holes can ensure uniform force distribution of the hinge during rotation, reduce local stress concentration, and thus improve the stability and durability of the structure. At the same time, when the ladder is unfolded or folded, each positioning hole can accurately match the locking hole. The user can easily select the most suitable positioning hole for locking as needed, thereby simplifying the operating steps and improving efficiency and convenience of use.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. When the two-way ladder is needed, pull the second ladder leg to rotate the second ladder leg with the hinge as the rotation center and the first ladder leg as the rotation starting point, adjust the angle between the first ladder leg and the second ladder leg to a suitable angle, insert the locking assembly into the locking hole and the positioning hole in turn, fix the angle between the first ladder leg and the second ladder leg, and realize the use and installation of the two-way ladder. It is not necessary to tighten the hinge structure of the first ladder leg and the second ladder leg, so that the first ladder leg and the second ladder leg can be easily unfolded. At the same time, insert the locking assembly into the locking hole and the positioning hole to fix the first ladder leg and the second ladder leg. The operation is simple, which improves the convenience of using the two-way ladder.

[0024] 2. Pull the locking head, adjust the angle between the first ladder leg and the second ladder leg to an appropriate size, loosen the locking head, the elastic part contracts, and the locking rod is inserted into the locking hole and the positioning hole in turn to fix the angle position between the first ladder leg and the second ladder leg. The elastic part continues to contract so that the locking head is tightly against the second ladder leg, further reducing the possibility of the locking rod being separated from the locking hole and the positioning hole.

[0025] Optionally, a lifting groove is provided on the side wall of the locking head;

[0026] 3. The equidistant circumferentially arranged positioning holes can ensure uniform force distribution of the hinge during rotation, reduce local stress concentration, and thus improve the stability and durability of the structure. At the same time, when the ladder is unfolded or folded, each positioning hole can accurately match the locking hole. Users can easily select the most suitable positioning hole for locking as needed, simplifying the operation steps and improving efficiency and convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application.

[0028] Figure 2 It is an exploded view of the connection structure between the first ladder leg and the second ladder leg in the embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of the position of the socket slot in the embodiment of the present application.

[0030] Description of reference numerals:

[0031] 1. First ladder leg; 2. Articulated rod; 21. Articulated member; 211. Positioning hole; 3. Second ladder leg; 31. Locking hole; 32. Socket slot; 4. Locking assembly; 41. Locking rod; 42. Locking head; 421. Pulling slot; 43. Elastic member; 44. Limiting member. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-3 This application is described in further detail.

[0033] The embodiment of the present application discloses an adjustable hinge structure for a bidirectional ladder.

[0034] Reference Figure 1 and Figure 2 , an adjustable hinge structure for a two-way ladder, comprising a first ladder leg 1, one end of the first ladder leg 1 is fixedly connected to a hinge rod 2, an end of the hinge rod 2 away from the first ladder leg 1 is fixedly connected to a hinge 21, a side of the hinge 21 close to the first ladder leg 1 is penetrated with a plurality of positioning holes 211, an end of the hinge rod 2 away from the first ladder leg 1 and is rotatably connected to a second ladder leg 3, a side of the second ladder leg 3 close to the hinge 21 is penetrated with a locking hole 31, a side of the second ladder leg 3 away from the first ladder leg 1 is provided with a locking assembly 4, the locking assembly 4 is sequentially inserted into the locking hole 31 and the positioning hole 211, the peripheral wall of the locking assembly 4 abuts against the hole wall of the positioning hole 211, and the locking assembly 4 abuts against the second ladder leg 3.

[0035] When using a two-way ladder, fix the position of the first ladder leg 1, take the hinged rod 2 as the rotation center and the first ladder leg 1 as the rotation starting point, pull the second ladder leg 3, and the second ladder leg 3 will be unfolded with the first ladder leg 1 with the hinged rod 2 as the rotation center, so that the angle between the first ladder leg 1 and the second ladder leg 3 is increased, and the angle between the first ladder leg 1 and the second ladder leg 3 is adjusted to an appropriate angle as needed, and then, the locking assembly 4 is inserted into the locking hole 31 and the positioning hole 211 in turn to fix the angle between the first ladder leg 1 and the second ladder leg 3, so as to realize the use and installation of the two-way ladder, without tightening the hinged structure of the first ladder leg 1 and the second ladder leg 3, so as to improve the unfolding smoothness of the first ladder leg 1 and the second ladder leg 3, and at the same time, insert the locking assembly 4 into the locking hole 31 and the positioning hole 211 to realize the fixation between the first ladder leg 1 and the second ladder leg 3, which is simple to operate and improves the convenience of using the two-way ladder.

[0036] Reference Figure 2 and Figure 3 The locking assembly 4 includes a locking rod 41 and a locking head 42. The locking rod 41 is fixed to the locking head 42. The end of the locking rod 41 away from the locking head 42 is inserted into the locking port and the positioning hole 211 in sequence, and the peripheral wall of the locking member abuts against the hole wall of the positioning hole 211. An elastic member 43 is provided at the end of the locking rod 41 away from the positioning hole 211. The elastic member 43 is fixedly connected to a side of the locking head 42 close to the locking rod 41. The end of the elastic member 43 away from the locking head 42 is fixed to the second ladder leg 3, and the side of the locking head 42 close to the locking rod 41 is fixed to the second ladder leg 3. The leg 3 is abutted against the side away from the first ladder leg 1, and a socket groove 32 is opened on the side of the second ladder leg 3 away from the first ladder leg 1. The socket groove 32 is connected with the locking hole 31, and the slot size of the socket groove 32 is larger than the hole size of the locking hole 31. The elastic member 43 is located in the socket groove 32, and the locking head 42 is located outside the socket groove 32. The hole size of the positioning hole 211 is equal to the hole size of the locking hole 31. The surrounding wall of the locking rod 41 is abutted against the hole wall of the locking hole 31, and the elastic member 43 is in a stretched state. In this embodiment, the elastic member 43 adopts a spring.

[0037] When the two-way ladder is fixed, the elastic member 43 connects the locking head 42 to the second ladder leg 3, so that the locking rod 41 is indirectly connected to the second ladder leg 3. When the position of the second ladder leg 3 is fixed, there is no need to search for the locking rod 41, which reduces the waste of searching time and improves the convenience of using the two-way ladder. At the same time, the elastic member 43 is in a stretched state, so that the elastic member 43 has a contraction elastic force, which can directly pull the locking head 42 away from the second ladder leg 3. After adjusting the angle between the first ladder leg 1 and the second ladder leg 3, the locking head 42 is released, the elastic member 43 contracts, the locking rod 41 is inserted into the positioning hole 211, and the locking head 42 is abutted against the second ladder leg 3, thereby reducing the possibility of the locking rod 41 falling off from the locking hole 31 and the positioning hole 211 to cause a safety hazard, thereby improving the safety of using the two-way ladder.

[0038] The locking head 42 is cylindrical. To facilitate the lifting of the locking head 42 and improve the convenience of lifting the locking head 42, a lifting groove 421 is opened on the side wall of the locking head 42 adjacent to the locking rod 41. The lifting groove 421 is in a ring shape.

[0039] A side of the locking head 42 close to the second ladder leg 3 is fixedly connected to a limiting member 44 . The limiting member 44 is strip-shaped and slidably connected to the second ladder leg 3 . The sliding direction of the limiting member 44 is consistent with the insertion direction of the locking rod 41 into the positioning hole 211 .

[0040] When the locking rod 41 is inserted into the positioning hole 211, the limit member 44 guides the insertion direction of the locking rod 41, so that the locking rod 41 moves in a certain direction, thereby reducing the possibility of deviation when the locking rod 41 is inserted into the positioning hole 211, resulting in difficulty in fixing and wasting time, and improving the insertion speed of the locking rod 41.

[0041] The hinge 21 is disc-shaped, the axis line of the hinge rod 2 is collinear with the axis line of the hinge disc, the peripheral wall of the hinge 21 is equidistantly provided with a plurality of teeth, the limiter 44 is inserted between adjacent teeth, when the limiter 44 abuts against the teeth, the axis line of the positioning hole 211 is collinear with the axis line of the locking hole 31, the length direction of the limiter 44 is parallel to the length direction of the locking rod 41, with the side of the locking head 42 close to the second ladder leg 3 as the length starting point, the length of the limiter 44 is longer than the length of the locking rod 41.

[0042] After preliminarily determining the angle between the first ladder leg 1 and the second ladder leg 3, the locking head 42 is released, the elastic member 43 contracts, and the limiting member 44 is inserted between the adjacent teeth. The locking rod 41 abuts against the side of the hinge 21 close to the second ladder leg 3, and the second ladder leg 3 is slightly rotated to make the teeth abut against the limiting member 44. At this time, the axis line of the positioning hole 211 is colinear with the axis line of the locking hole 31, and the spring member continues to contract. Under the guidance of the limiting member 44, the locking rod 41 can be directly inserted into the locking hole 31 and the positioning hole 211, thereby shortening the time for the locking rod 41 to be inserted into the positioning hole 211 and improving the convenience of using the two-way ladder.

[0043] To further improve the convenience of inserting the locking rod 41 into the positioning hole 211, one end of the locking rod 41 inserted into the positioning hole 211 is provided with a rounded corner, so that the insertion end of the locking rod 41 is in a retracted shape, which facilitates the insertion of the locking rod 41 into the positioning hole 211 and shortens the time.

[0044] The positioning holes 211 are equidistantly arranged around the hinge rod 2 on one side of the hinge 21. The number of the positioning holes 211 is consistent with the number of the teeth, so that when the ladder is unfolded or folded, each positioning hole 211 can accurately match the locking hole 31, and the most suitable positioning hole 211 can be easily selected for locking, which simplifies the operation steps and improves the efficiency and convenience of use.

[0045] The implementation principle of an adjustable hinge structure for a two-way ladder in the embodiment of the present application is as follows: when the two-way ladder is used, the locking head 42 is pulled away from the second ladder leg 3, and after adjusting the angle between the first ladder leg 1 and the second ladder leg 3, the locking head 42 is released, the elastic member 43 contracts, and the limiting member 44 is inserted between the adjacent teeth. The locking rod 41 abuts against the side of the hinge 21 close to the second ladder leg 3, and the second ladder leg 3 is slightly rotated so that the limiting member 44 abuts against the teeth. At this time, the axis of the locking hole 31 is aligned with the positioning hole 31. The axial lines of 211 are collinear, the elastic member 43 continuously contracts, the locking rod 41 is inserted into the positioning hole 211, the locking head 42 abuts against the second ladder leg 3, and the use and installation of the two-way ladder is realized. There is no need to tighten the hinged structure of the first ladder leg 1 and the second ladder leg 3, which improves the smoothness of the deployment of the first ladder leg 1 and the second ladder leg 3. At the same time, the locking rod 41 is inserted into the locking hole 31 and the positioning hole 211 to realize the fixation between the first ladder leg 1 and the second ladder leg 3. The operation is simple, which improves the convenience of using the two-way ladder.

[0046] The above are all preferred embodiments of the present application. The embodiments are only explanations of the present application and do not limit the protection scope of the present application in turn. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An adjustable hinge structure for a two-way ladder, characterized in that: The invention comprises a first ladder leg (1), wherein the first ladder leg (1) is fixedly connected to a hinge (21), the hinge (21) is provided with a plurality of positioning holes (211), the hinge (21) is rotatably connected to a second ladder leg (3), the second ladder leg (3) is provided with a locking hole (31), a locking assembly (4) is provided on one side of the second ladder leg (3), the locking assembly (4) is inserted into the locking hole (31) and the positioning hole (211) in sequence, the peripheral wall of the locking assembly (4) abuts against the hole wall of the positioning hole (211), and the locking assembly (4) abuts against the second ladder leg (3).

2. The adjustable hinge structure for a two-way ladder according to claim 1, characterized in that: One end of the locking assembly (4) away from the positioning hole (211) is connected to an elastic member (43), and one end of the elastic member (43) away from the locking assembly (4) is fixed to the second ladder leg (3), and the elastic member (43) is in a stretched state.

3. The adjustable hinge structure for a two-way ladder according to claim 2, characterized in that: The locking assembly (4) comprises a locking rod (41) and a locking head (42), wherein the locking rod (41) is connected to the locking head (42), the locking rod (41) is inserted into the positioning hole (211), and the peripheral wall of the locking rod (41) abuts against the hole wall of the positioning hole (211), the locking head (42) is fixed to the elastic member (43), and the locking head (42) abuts against the second ladder leg (3).

4. The adjustable hinge structure for a two-way ladder according to claim 3, characterized in that: The side wall of the locking head (42) is provided with a lifting groove (421).

5. The adjustable hinge structure for a two-way ladder according to claim 1, characterized in that: The locking assembly (4) is connected to a limiting member (44), the limiting member (44) is slidably connected to the second ladder leg (3), and the sliding direction of the limiting member (44) is consistent with the insertion direction of the locking assembly (4) into the positioning hole (211).

6. The adjustable hinge structure for a two-way ladder according to claim 5, characterized in that: The hinge (21) is in the shape of a disk, and a peripheral wall of the hinge (21) is provided with a plurality of teeth. The limiting member (44) is inserted between adjacent teeth, and the limiting member (44) abuts against the teeth.

7. The adjustable hinge structure for a two-way ladder according to claim 1, characterized in that: One end of the locking assembly (4) inserted into the positioning hole (211) is in a retracted shape.

8. The adjustable hinge structure for a two-way ladder according to claim 1, characterized in that: The positioning holes (211) are arranged equidistantly in the circumferential direction.

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