Herringbone ladder with auxiliary handrail

Abstract

The herringbone ladder with the auxiliary handrail comprises a front ladder frame, a rear ladder frame, a switching lug and the auxiliary handrail, the front ladder frame and the rear ladder frame are connected through the switching lug, the front ladder frame and the rear ladder frame are mutually unfolded or folded, the front ladder frame comprises a front left ladder pipe and a front right ladder pipe, and the front left ladder pipe and the front right ladder pipe are connected through the switching lug. A left inserting opening is formed in the top end of the front left ladder pipe, and a right inserting opening is formed in the top end of the front right ladder pipe; the auxiliary handrail comprises a left rod body and a right rod body, the left rod body is movably arranged in the front left ladder pipe, the left rod body can extend out of the front left ladder pipe or retract into the front left ladder pipe along the left inserting opening, and the left rod body extends out of the front left ladder pipe to form a left handrail part; the design of the auxiliary handrail conforms to human engineering, the height and the position of the handrail can be adjusted according to the needs of a user, and comfortable holding experience can be provided during operation at different heights.

Description

Technical Field

[0001] The utility model relates to a herringbone ladder with auxiliary handrails. Background Art

[0002] The ladder products currently on the market are usually designed to meet the minimum height requirements of existing standards. For example, the top guardrail of a platform ladder and the top handrail of a stepladder generally only meet the minimum height requirements of existing standards.

[0003] In actual use, these designs often ignore the comfort needs of users. Especially when working at height, users usually need to hold the handrails for an extra sense of security. Although the existing designs can provide basic safety guarantees, there is still much room for improvement in terms of improving user comfort. Utility Model Content

[0004] The utility model aims to provide a stepladder with auxiliary handrails which improves the comfort and safety of use.

[0005] The purpose of the utility model is achieved in this way:

[0006] A herringbone ladder with auxiliary handrails, comprising a front ladder frame, a rear ladder frame, a transfer ear and an auxiliary handrail, wherein the front ladder frame and the rear ladder frame are connected via the transfer ear, and the front ladder frame and the rear ladder frame are mutually expanded or folded, wherein the front ladder frame comprises a front left ladder tube and a front right ladder tube, wherein the top end of the front left ladder tube is provided with a left socket, and the top end of the front right ladder tube is provided with a right socket;

[0007] The auxiliary handrail comprises a left rod body and a right rod body, wherein the left rod body is movably placed in the front left ladder tube, the left rod body can extend out of or retract into the front left ladder tube along the left socket, and the left rod body extends out of the front left ladder tube to form a left handrail portion;

[0008] The right rod body is movably placed in the front right ladder tube, and the right rod body can be extended along the right insertion opening or retracted into the front right ladder tube, and the right rod body extends out of the front right ladder tube to form a right handrail.

[0009] By adding a retractable auxiliary handrail to the front ladder frame, users can hold the handrail more firmly when working at height, thereby improving overall safety and reducing the risk of slipping or losing balance.

[0010] The auxiliary armrest is ergonomically designed, and the height and position of the armrest can be adjusted according to the needs of the user, providing a comfortable holding experience when working at different heights.

[0011] The auxiliary handrail can be retracted and stored, and the ladder can become more compact when not in use, taking up less storage space. At the same time, it is more convenient during packaging and transportation, reducing the volume and transportation costs.

[0012] This design is not only suitable for home use, but also for the needs of aerial work in various professional fields and has broad application prospects.

[0013] The telescopic design of the auxiliary armrest is simple and easy to use. The user can easily extend and retract the armrest without the need for complicated adjustment processes, thereby improving the convenience of use.

[0014] The purpose of the utility model can also be solved by the following technical measures:

[0015] Furthermore, the auxiliary handrail further comprises a left connecting block, a transverse tube and a right connecting block, the left connecting block is provided with a left inserting portion, the left inserting portion passes through a left port of the transverse tube and is inserted into the transverse tube, the left inserting portion and the transverse tube are movably connected, and the left rod body and the left connecting block are fixedly connected;

[0016] The right connecting block is provided with a right inserting portion, the right inserting portion passes through the right port of the cross tube and is inserted into the cross tube, the right inserting portion and the cross tube are movably connected, and the right rod body and the right connecting block are fixedly connected;

[0017] The auxiliary handrail is formed by connecting the left rod body, the left connecting block, the cross pipe, the right connecting block and the right rod body.

[0018] The left connecting block and the right connecting block are respectively inserted into the cross tube through the left inserting part and the right inserting part, and are movably connected with the cross tube, so that the whole auxiliary handrail structure is more stable, the possibility of shaking of the handrail during use is reduced, and the safety is further improved.

[0019] The movable connection design between the left and right inserts and the horizontal tube allows the handrails to be flexibly adjusted to meet the needs of operations at different heights, thereby improving the adaptability of the stepladder in different working environments.

[0020] The fixed connection between the left rod and the left connecting block, and the right rod and the right connecting block ensures the stability and reliability of the armrest. During use, the armrest will not fall off or shift due to external forces, providing more reliable support.

[0021] The left rod body, the left connecting block, the cross tube, the right connecting block and the right rod body are connected to form an integral auxiliary handrail, so that the handrail is dispersed to the entire structure when subjected to force, avoiding excessive pressure on a single component, thereby enhancing the bearing capacity and durability of the handrail.

[0022] The overall structural design of the auxiliary handrail provides strong support, making the stepladder more stable when in use. Especially when working at height, users can operate with greater peace of mind, thus improving work efficiency and safety.

[0023] Through the movable connection design, the height of the auxiliary armrest can be adjusted according to the needs of the user, providing a more ergonomic holding experience and reducing fatigue caused by long-term work.

[0024] Furthermore, it also includes a rivet, the left inserting portion is provided with a transverse limiting hole, the rivet passes through the transverse limiting hole of the left inserting portion to lock the transverse tube, so that the left connecting block and the transverse tube are movably connected, and the transverse limiting hole limits the movement range of the rivet, thereby limiting the movement range of the left connecting block;

[0025] The right inserting part is provided with a transverse limiting hole, and the rivet passes through the transverse limiting hole of the right inserting part to lock the transverse tube so that the right connecting block and the transverse tube are movably connected, and the transverse limiting hole limits the moving range of the rivet, thereby limiting the moving range of the right connecting block.

[0026] The rivets pass through the transverse limiting holes of the left and right inserting parts and lock the transverse tube, so that the left and right connecting blocks and the transverse tube form a stable connection structure. This can prevent the connecting parts from loosening or falling off during use, and improve the overall stability and safety of the auxiliary handrail.

[0027] The design of the transverse limiting hole limits the movement range of the rivet, thereby limiting the movement range of the left and right connecting blocks. This limiting mechanism ensures that the handrail remains in the preset position during use, avoids unintentional movement or deviation of the handrail, and improves the safety of use. Moreover, when the auxiliary handrail is extended outward, when the rivet moves to the extreme position of the transverse limiting hole (the shortest distance between the left and right connecting blocks is formed), it limits the left and right rods, preventing the left rod from detaching from the front left ladder tube and the right rod from detaching from the front right ladder tube.

[0028] Although the rivets lock the connection between the left and right inserts and the transverse tube, the existence of the transverse limit hole still allows this connection to have a certain range of motion. This movable connection design not only ensures the stability of the structure, but also provides the necessary flexibility, allowing the auxiliary handrail to be fine-tuned according to usage requirements.

[0029] The use of rivets enhances the durability of the connection points. Rivets have high tensile and shear strength, allowing the connection parts to withstand greater use pressure and frequent operations, thereby increasing the service life of the auxiliary handrail.

[0030] The rivet locking connection structure is more reliable than other connection methods, which can effectively prevent the connection parts from loosening and ensure safety and stability during use. This reliability is particularly important when working at heights.

[0031] Since the upper width of the ladder is smaller than the lower width, the upper width of the auxiliary handrail will change at different heights. Through the movable connection of the left and right connecting blocks with the cross pipe, the auxiliary handrail can automatically adjust the upper width according to the characteristics of the ladder to ensure its adaptability.

[0032] By setting transverse limiting holes on the left and right inserting parts and using rivets to pass through the transverse limiting holes to lock the transverse tube, the movement range of the left and right connecting blocks can be limited within a certain range, thereby ensuring the stability and reliability of the connection between the transverse tube and the ladder.

[0033] The width of the auxiliary handrail can be automatically adjusted according to the height, ensuring that the handrail can always provide effective support when used at different heights, improving the safety and operating comfort of the ladder during high-altitude operations.

[0034] The movable connection design allows the left connecting block, the right connecting block and the cross pipe to be flexibly moved within a certain range, making it convenient for users to quickly adjust the width of the auxiliary armrest according to actual needs, simplifying the operation process and improving ease of use.

[0035] The left connecting block and the right connecting block are movably connected to the cross pipe, so that the auxiliary handrail can adapt to the width changes of the ladder at different heights, expand the application scope of the ladder, and meet diverse usage needs.

[0036] Users do not need to worry about the mismatch of armrest width when adjusting the height of the auxiliary armrest, which provides a more comfortable and smooth use experience and enhances the user-friendliness of the product.

[0037] Further, the front left ladder tube is spaced apart with retaining holes, the left rod body is provided with retaining columns, the retaining columns are movably connected to the left rod body, when the retaining columns are moved away from the corresponding retaining holes, the left rod body is in a free state, and the left rod body can slide along the length direction of the front left ladder tube, when the retaining columns are moved and inserted into the corresponding retaining holes, the left rod body is in a locked state, thereby locking the position of the left handrail;

[0038] The front right ladder tube is spaced apart with locking holes, and the right rod body is provided with a locking column, which is movably connected to the right rod body. When the locking column is moved to leave the corresponding locking hole, the right rod body is in a free state, and the right rod body can slide along the length direction of the front right ladder tube. When the locking column is moved to insert into the corresponding locking hole, the right rod body is in a locked state, thereby locking the position of the right handrail.

[0039] By setting the clamping holes on the front left ladder tube and the front right ladder tube, and cooperating with the clamping posts on the left and right rod bodies, the user can easily adjust the height of the auxiliary handrail. The handrail position can be locked or unlocked by simply moving the clamping post to insert or leave the clamping hole. The operation is simple and quick.

[0040] When the locking column is inserted into the locking hole, the left rod body and the right rod body are in a locked state, ensuring that the armrest will not slide at will during use, providing solid support and effectively improving safety of use.

[0041] The locking holes are arranged at intervals, allowing users to select different heights for locking according to actual needs. This design provides flexibility in height adjustment, meets the needs of different working heights and different users, and improves the adaptability of the ladder.

[0042] The movable connection design of the locking column provides clear locking feedback when inserted into the locking hole, reducing the risk of misoperation. The user can intuitively judge whether the armrest is in a locked state, thus avoiding safety hazards caused by the armrest not being locked.

[0043] By adjusting the height of the left and right armrests, users can adjust the armrests to the height that best suits their grip, providing a more ergonomic operating experience and reducing fatigue caused by long-term work.

[0044] The structural design of the locking hole and the locking column is relatively simple, but provides a reliable locking function, reduces the failure rate, and improves the durability and reliability of the ladder.

[0045] Furthermore, the left connecting block is provided with a left switch, and the left switch is connected to the clamping column of the left rod body. The action of the left switch drives the clamping column to move, so that the clamping column of the left rod body is inserted into the clamping hole corresponding to the front left ladder tube or leaves the clamping hole corresponding to the front left ladder tube;

[0046] The right connecting block is provided with a right switch, and the right switch is connected to the clamping column of the right rod body. The action of the right switch drives the clamping column to move, so that the clamping column is inserted into the clamping hole corresponding to the front right ladder tube or leaves the clamping hole corresponding to the front right ladder tube.

[0047] By setting switches on the left and right connecting blocks, users can more conveniently control the movement of the clamping column. The design of the left and right switches makes it easier to adjust the height of the auxiliary armrest without directly manually operating the clamping column, further improving the convenience of use.

[0048] The switch design makes the adjustment process smoother. Users can quickly adjust the armrest height without complicated operating steps. It is especially suitable for work scenarios where the armrest height needs to be adjusted frequently, which improves work efficiency.

[0049] Using a switch to adjust the clamping column not only makes the operation more labor-saving, but also reduces hand fatigue caused by frequent manual operation and improves the overall comfort of use.

[0050] In an emergency, the user can quickly release the locking column through the switch, so that the handrail is quickly in a free state, which is convenient for the rapid storage or adjustment of the ladder and improves the operational flexibility in an emergency.

[0051] Furthermore, it also includes a toolbox, which is provided with a storage cavity for storing the cross tube. The toolbox is arranged on the top of the front ladder frame. When the auxiliary handrail is folded, the cross tube is placed in the storage cavity, and the surface of the cross tube is flush with the surface of the toolbox.

[0052] The combination of the tool box and the top of the front ladder frame makes the cross tube flush with the surface of the tool box after folding and storage. The overall appearance of the ladder is more concise and beautiful, which improves the overall design sense and market competitiveness of the product.

[0053] When the left and right rods of the auxiliary handrail are retracted into the front ladder frame and the horizontal tube of the auxiliary handrail is stored in the tool box, the ladder becomes more compact, which reduces the space occupied during carrying and transportation, facilitates users to move and store, and reduces transportation costs.

[0054] The tool box not only provides the function of storing horizontal pipes, but can also be used to store other tools and items, thereby improving the versatility and practicality of the ladder and meeting the diverse needs of users during work.

[0055] When the auxiliary armrest is not in use, the horizontal tube of the auxiliary armrest is stored in the tool box, avoiding safety hazards such as accidental bumps or trips caused by the exposed horizontal tube, and improving the safety of the use environment.

[0056] By storing the horizontal tube of the auxiliary handrail in the tool box, the space on the top of the ladder is effectively utilized, the space utilization rate is optimized, and the ladder is more compact and tidy when not in use.

[0057] The auxiliary armrest has a small volume after being folded, which is convenient for packaging and transportation, reducing storage and transportation costs.

[0058] The beneficial effects of the utility model are as follows:

[0059] The utility model adds a retractable auxiliary handrail to the front ladder frame, so that the user can hold the handrail more firmly when working at height, thereby improving the overall safety and reducing the risk of slipping or losing balance.

[0060] The utility model has an auxiliary armrest designed in accordance with ergonomics, and the height and position of the armrest can be adjusted according to the needs of the user, so that a comfortable holding experience can be provided in operations at different heights.

[0061] The utility model can retract the auxiliary handrails to make the ladder more compact when not in use, taking up less storage space. At the same time, it is more convenient to pack and transport, reduces the volume and reduces the transportation cost.

[0062] In the utility model, by arranging switches on the left connecting block and the right connecting block, the user can more conveniently control the movement of the clamping column. The design of the left switch and the right switch makes it easier to adjust the height of the auxiliary armrest without directly manually operating the clamping column, further improving the convenience of use.

[0063] The utility model combines the tool box with the top of the front ladder frame so that the horizontal tube is flush with the surface of the tool box after being folded and stored, and the overall appearance of the ladder is more concise and beautiful, thereby improving the overall design sense and market competitiveness of the product.

[0064] The utility model provides that when the left rod body and the right rod body of the auxiliary handrail are retracted into the front ladder frame and the horizontal pipe of the auxiliary handrail is stored in the tool box, the appearance of the ladder is more compact, the space occupied during carrying and transportation is reduced, the user is convenient to move and store, and the transportation cost is reduced.

[0065] In the utility model, since the upper width of the ladder is smaller than the lower width, the upper width of the auxiliary handrail will change accordingly at different heights. The auxiliary handrail can automatically adjust the upper width according to the characteristics of the ladder through the movable connection between the left and right connecting blocks and the horizontal pipe, ensuring its adaptability and ensuring that the auxiliary handrail can always provide effective support when used at different heights, thereby improving the safety and operating comfort of the ladder during high-altitude operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 This is a schematic diagram of an auxiliary handrail.

[0067] Figure 2 Assembly drawing of the left connecting block and cross pipe of the auxiliary handrail.

[0068] Figure 3 This is a schematic diagram of a herringbone ladder with auxiliary handrails (the auxiliary handrails are in the unfolded state).

[0069] Figure 4 for Figure 3 A magnified view of part A.

[0070] Figure 5 for Figure 4 Schematic diagram from another angle.

[0071] Figure 6 This is a schematic diagram of a stepladder with auxiliary handrails (the auxiliary handrails are in the retracted state).

[0072] Figure 7 for Figure 6 Enlarged view of part B.

[0073] Figure 8 This is a schematic diagram of a herringbone ladder (excluding the auxiliary handrail). DETAILED DESCRIPTION

[0074] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0075] Example, combined with Figures 1 to 8 As shown, a herringbone ladder with auxiliary handrails comprises a front ladder frame 1, a rear ladder frame 2, a transfer ear 3 and an auxiliary handrail 4, wherein the front ladder frame 1 and the rear ladder frame 2 are connected via the transfer ear 3, and the front ladder frame 1 and the rear ladder frame 2 are mutually expanded or folded, and the front ladder frame 1 comprises a front left ladder pipe 11 and a front right ladder pipe 12, wherein the top end of the front left ladder pipe 11 is provided with a left socket 111, and the top end of the front right ladder pipe 12 is provided with a right socket 121;

[0076] The auxiliary handrail 4 includes a left rod body 5 and a right rod body 6. The left rod body 5 is movably placed in the front left ladder tube 11. The left rod body 5 can be extended or retracted into the front left ladder tube 11 along the left socket 111. The left rod body 5 extends out of the front left ladder tube 11 to form a left handrail portion.

[0077] The right rod body 6 is movably placed in the front right ladder tube 12 , and the right rod body 6 can extend out of or retract into the front right ladder tube 12 along the right insertion opening 121 . The right rod body 6 extends out of the front right ladder tube 12 to form a right handrail.

[0078] Furthermore, the auxiliary handrail 4 further comprises a left connecting block 7, a transverse tube 8 and a right connecting block 9, the left connecting block 7 is provided with a left inserting portion 71, the left inserting portion 71 passes through the left port of the transverse tube 8 and is inserted into the transverse tube 8, the left inserting portion 71 and the transverse tube 8 are movably connected, and the left rod body 5 and the left connecting block 7 are fixedly connected;

[0079] The right connecting block 9 is provided with a right inserting portion, the right inserting portion passes through the right port of the transverse tube 8 and is inserted into the transverse tube 8, the right inserting portion and the transverse tube 8 are movably connected, and the right rod body 6 and the right connecting block 9 are fixedly connected;

[0080] The auxiliary handrail 4 is formed by connecting the left rod body 5, the left connecting block 7, the cross pipe 8, the right connecting block 9 and the right rod body 6.

[0081] Furthermore, it also includes a rivet 10, and the left inserting portion 71 is provided with a transverse limiting hole 711. The rivet 10 passes through the transverse limiting hole 711 of the left inserting portion 71 to lock the transverse tube 8, so that the left connecting block 7 and the transverse tube 8 are movably connected, and the transverse limiting hole 711 limits the movement range of the rivet 10, thereby limiting the movement range of the left connecting block 7;

[0082] The right inserting portion is provided with a transverse limiting hole 711, and the rivet 10 passes through the transverse limiting hole 711 of the right inserting portion to lock the transverse tube 8, so that the right connecting block 9 and the transverse tube 8 are movably connected, and the transverse limiting hole 711 limits the moving range of the rivet 10, thereby limiting the moving range of the right connecting block 9.

[0083] Further, the front left ladder tube 11 is spaced apart with retaining holes 100, the left rod body 5 is provided with retaining columns 200, the retaining columns 200 are movably connected to the left rod body 5, when the retaining columns 200 are moved away from the corresponding retaining holes 100, the left rod body 5 is in a free state, and the left rod body 5 can slide along the length direction of the front left ladder tube 11, when the retaining columns 200 are moved and inserted into the corresponding retaining holes 100, the left rod body 5 is in a locked state, thereby locking the position of the left handrail;

[0084] The front right ladder tube 12 is spaced apart with retaining holes 100, and the right rod body 6 is provided with a retaining column 200, and the retaining column 200 is movably connected to the right rod body 6. When the retaining column 200 is moved to leave the corresponding retaining hole 100, the right rod body 6 is in a free state, and the right rod body 6 can slide along the length direction of the front right ladder tube 12. When the retaining column 200 is moved to insert into the corresponding retaining hole 100, the right rod body 6 is in a locked state, thereby locking the position of the right armrest.

[0085] Furthermore, the left connecting block 7 is provided with a left switch 72, and the left switch 72 is connected to the clamping column 200 of the left rod body 5. The left switch 72 is actuated to drive the clamping column 200 to move, so that the clamping column 200 of the left rod body 5 is inserted into the clamping hole 100 corresponding to the front left ladder tube 11 or leaves the clamping hole 100 corresponding to the front left ladder tube 11;

[0086] The right connecting block 9 is provided with a right switch 91, and the right switch 91 is connected to the clamping column 200 of the right rod body 6. The action of the right switch 91 drives the clamping column 200 to move, so that the clamping column 200 is inserted into the clamping hole 100 corresponding to the front right ladder tube 12 or leaves the clamping hole 100 corresponding to the front right ladder tube 12.

[0087] Furthermore, it also includes a toolbox 300, which is provided with a storage cavity 301 for storing the cross tube 8. The toolbox 300 is arranged on the top of the front ladder frame 1. When the auxiliary handrail 4 is folded, the cross tube 8 is placed in the storage cavity 301, and the surface of the cross tube 8 is flush with the surface of the toolbox 300.

[0088] The auxiliary handrail cannot be disassembled after installation:

[0089] The left rod 5 of the auxiliary handrail 4 can extend along the left socket 111 or retract into the front left ladder tube 11, and the right rod 6 of the auxiliary handrail 4 can extend along the right socket 121 or retract into the front right ladder tube 12, so as to realize the sliding connection between the auxiliary handrail and the ladder.

[0090] When the auxiliary handrail 4 is extended or retracted, the design of the transverse limiting hole 711 limits the movement range of the rivet 10, thereby limiting the movement range of the left connecting block 7 and the right connecting block 9. This limiting mechanism ensures that the auxiliary handrail 4 remains in the preset position during use, avoids unintentional movement or deviation of the handrail, and improves the safety of use. Moreover, when the auxiliary handrail 4 is extended outward, when the rivet 10 moves to the extreme position of the transverse limiting hole 711 (forming the shortest distance between the left connecting block 7 and the right connecting block 9), it limits the left rod 5 and the right rod 6, preventing the left rod 5 from detaching from the front left ladder tube 11 and the right rod 6 from detaching from the front right ladder tube 12, preventing the auxiliary handrail 4 from detaching. Therefore, when the auxiliary handrail 4 is extended to the extreme position, the auxiliary handrail 4 will not separate from the stepladder, thereby improving safety.

[0091] Method for adjusting the height of auxiliary armrest 4:

[0092] Preparation:

[0093] Make sure the stepladder is unfolded and placed firmly on the ground.

[0094] Confirm that the left rod body 5 and the right rod body 6 of the auxiliary armrest 4 are both in a locked state.

[0095] Unlocking the auxiliary armrest 4:

[0096] Find the left switch 72 on the left connecting block 7, find the right switch 91 on the right connecting block 9, and press the left switch 72 and the right switch 91 at the same time.

[0097] The left switch 72 drives the clamping column 200 of the left rod body 5 to move, so that it leaves the clamping hole 100 of the front left ladder tube 11. At this time, the left rod body 5 is in a free state and can slide in the front left ladder tube 11.

[0098] The right switch 91 drives the clamping post 200 of the right rod body 6 to move, so that it leaves the clamping hole 100 of the front right ladder tube 12. At this time, the right rod body 6 is in a free state and can slide in the front right ladder tube 12.

[0099] Adjust the armrest height:

[0100] When the left rod body 5 and the right rod body 6 are in a free state, the left handrail portion and the right handrail portion are slid along the length direction of the front left ladder tube 11 and the front right ladder tube 12 to a desired height according to usage requirements.

[0101] During the adjustment process, the required height can be determined by observing the positions of the clamping holes 100 on the front left ladder tube 11 and the front right ladder tube 12 .

[0102] Locking auxiliary armrest 4:

[0103] After adjusting to the desired height, release the left switch 72 to align the clamping column 200 of the left rod body 5 with and insert it into the corresponding clamping hole 100 on the front left ladder tube 11 to ensure that the left rod body 5 is locked at the new height position.

[0104] Release the right switch 91 to align the clamping column 200 of the right rod body 6 with and insert it into the corresponding clamping hole 100 on the front right ladder tube 12 to ensure that the right rod body 6 is locked at a new height position.

[0105] Confirm lock:

[0106] Confirm that the left and right armrests are locked at the desired height. The armrests can be shaken slightly to ensure that the locking column 200 is inserted into the locking hole 100 and is firmly fixed.

[0107] Storage auxiliary armrest 4:

[0108] If the auxiliary armrest 4 is not needed, it can be stored in the tool box 300 .

[0109] By pressing the left switch 72 and the right switch 91 at the same time, the left rod body 5 and the right rod body 6 are retracted into the front left ladder tube 11 and the front right ladder tube 12, and the cross tube 8 enters the storage cavity 301 at the top of the tool box 300, so that the surface of the cross tube 8 is flush with the surface of the tool box 300.

Claims

1. A herringbone ladder with auxiliary handrails, comprising a front ladder frame, a rear ladder frame, a transfer ear and an auxiliary handrail, wherein the front ladder frame and the rear ladder frame are connected by the transfer ear, and the front ladder frame and the rear ladder frame are mutually unfolded or folded, characterized in that: The front ladder frame includes a front left ladder tube and a front right ladder tube, the top of the front left ladder tube is provided with a left socket, and the top of the front right ladder tube is provided with a right socket; The auxiliary handrail comprises a left rod body and a right rod body, wherein the left rod body is movably placed in the front left ladder tube, the left rod body can extend out of or retract into the front left ladder tube along the left socket, and the left rod body extends out of the front left ladder tube to form a left handrail portion; The right rod body is movably placed in the front right ladder tube, and the right rod body can extend out of or retract into the front right ladder tube along the right insertion opening, and the right rod body extends out of the front right ladder tube to form a right handrail.

2. The stepladder with auxiliary handrails according to claim 1, characterized in that: The auxiliary handrail further comprises a left connecting block, a transverse tube and a right connecting block, wherein the left connecting block is provided with a left inserting portion, the left inserting portion passes through a left port of the transverse tube and is inserted into the transverse tube, the left inserting portion and the transverse tube are movably connected, and the left rod body and the left connecting block are fixedly connected; The right connecting block is provided with a right inserting portion, the right inserting portion passes through the right port of the cross tube and is inserted into the cross tube, the right inserting portion and the cross tube are movably connected, and the right rod body and the right connecting block are fixedly connected; The auxiliary handrail is formed by connecting the left rod body, the left connecting block, the cross pipe, the right connecting block and the right rod body.

3. The stepladder with auxiliary handrails according to claim 2, characterized in that: It also includes a rivet, the left inserting part is provided with a transverse limiting hole, the rivet passes through the transverse limiting hole of the left inserting part to lock the transverse tube, so that the left connecting block and the transverse tube are movably connected, and the transverse limiting hole limits the movement range of the rivet, thereby limiting the movement range of the left connecting block; The right inserting part is provided with a transverse limiting hole, and the rivet passes through the transverse limiting hole of the right inserting part to lock the transverse tube so that the right connecting block and the transverse tube are movably connected, and the transverse limiting hole limits the moving range of the rivet, thereby limiting the moving range of the right connecting block.

4. The stepladder with auxiliary handrails according to claim 2, characterized in that: The front left ladder tube is spaced apart with retaining holes, the left rod body is provided with retaining posts, the retaining posts are movably connected to the left rod body, when the retaining posts are moved away from the corresponding retaining holes, the left rod body is in a free state, and the left rod body can slide along the length direction of the front left ladder tube, when the retaining posts are moved and inserted into the corresponding retaining holes, the left rod body is in a locked state, thereby locking the position of the left handrail; The front right ladder tube is spaced apart with locking holes, and the right rod body is provided with a locking column, which is movably connected to the right rod body. When the locking column is moved to leave the corresponding locking hole, the right rod body is in a free state, and the right rod body can slide along the length direction of the front right ladder tube. When the locking column is moved to insert into the corresponding locking hole, the right rod body is in a locked state, thereby locking the position of the right handrail.

5. The stepladder with auxiliary handrails according to claim 4, characterized in that: The left connecting block is provided with a left switch, and the left switch is connected to the clamping column of the left rod body. The action of the left switch drives the clamping column to move, so that the clamping column of the left rod body is inserted into the clamping hole corresponding to the front left ladder tube or leaves the clamping hole corresponding to the front left ladder tube; The right connecting block is provided with a right switch, and the right switch is connected to the clamping column of the right rod body. The action of the right switch drives the clamping column to move, so that the clamping column is inserted into the clamping hole corresponding to the front right ladder tube or leaves the clamping hole corresponding to the front right ladder tube.

6. The stepladder with auxiliary handrails according to claim 2, characterized in that: It also includes a tool box, which is provided with a storage cavity for storing the cross tube. The tool box is arranged on the top of the front ladder frame. When the auxiliary handrail is folded, the cross tube is placed in the storage cavity, and the surface of the cross tube is flush with the surface of the tool box.

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