A reset self-locking lightweight safe intelligent movable ladder
By designing the articulated structure and self-locking mechanism on the movable ladder, the automatic locking of the movable ladder after being closed is achieved, the problem of staff forgetting to lock is solved, and safety is improved, and the control room is notified to ensure the tank truck. Safe operation.
Patent Information
- Application Number
- CN202010677295.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-07-14
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2040-07-14
AI Technical Summary
Staff are prone to forget to lock it after closing it when using the movable ladder, which leads to safety hazards.
A reset self-locking lightweight, safe and intelligent movable ladder is designed, adopting a hinged structure and a self-locking mechanism. The movable ladder is realized by hinged on the upper and lower arms of the mounting seat and the pedals arranged at intervals, combined with the reset spring and lock hook. The automatic locking mechanism automatically locks when the movable ladder is closed to prevent accidental expansion.
It effectively prevents the movable ladder from unfolding unexpectedly after use, improves safety, and sends a signal to the control room through the reset detection sensor to ensure that the tank truck drives safely away from the scene.
Smart Images
Figure CN111734296B_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a movable ladder, and in particular to a reset self-locking lightweight safe intelligent movable ladder. Background Art
[0002] As we all know, currently, whether it is tank truck loading and unloading operations or equipment maintenance, workers need to go to the top of the tank truck to work. In order to facilitate workers to go to the top of the tank truck, a movable ladder is usually installed on the edge of the trestle; when the workers need to go to the top of the tank truck to work, they will put the movable ladder on the top of the tank truck, and then climb to the top of the tank truck with the movable ladder; when the workers finish the work and return to the trestle from the top of the tank truck, they need to fold the movable ladder and manually lock it.
[0003] With respect to the above-mentioned related technologies, the inventor believes that there is a situation where the staff forgets to lock the movable ladder after the movable ladder is folded. Summary of the invention
[0004] In order to automatically lock the movable ladder after it is folded, the present application provides a reset self-locking lightweight safe intelligent movable ladder.
[0005] The present application provides a reset self-locking lightweight safe intelligent movable ladder adopts the following technical solutions:
[0006] A reset self-locking lightweight safe intelligent movable ladder comprises a mounting seat, two upper arms hinged on the mounting seat, two lower arms hinged on the mounting seat and a plurality of pedals spaced between the two upper arms, wherein the pedals are hinged to the two upper arms and the two lower arms; and further comprises a self-locking mechanism hinged on the mounting seat, wherein the upper arms or the lower arms are provided with a mating piece which is engaged with the self-locking mechanism.
[0007] By adopting the above technical solution, when in use, the mounting base is fixed on the trestle; the staff can manually release the clamping relationship between the self-locking mechanism and the matching piece, and then push the upper arm and the lower arm to rotate around the hinged end, so that the movable ladder is unfolded and overlapped on the top of the tank car; then the staff can climb to the top of the tank car through the pedal; after use, the staff can pull the upper arm and the lower arm on the trestle to rotate around the hinged end to fold the movable ladder, and when the movable ladder is folded, the self-locking mechanism and the matching piece are automatically engaged, thereby locking the movable ladder to prevent the movable ladder from accidentally unfolding and causing a safety accident.
[0008] Preferably, the mating piece is provided with a slot with an opening facing upward; the self-locking mechanism includes a lock hook, a reset spring and a hinge shaft, the lock hook includes a hook portion and a counterweight portion connected to one end of the hook portion, there is a certain angle between the hook portion and the counterweight portion, and the end of the hook portion away from the counterweight portion is provided with a barb adapted to the slot, the hinge shaft transversely passes through the connection between the hook portion and the counterweight portion and hinges the lock hook to the mounting seat; the reset spring is connected between the counterweight portion and the mounting seat and uses its elastic force to prevent the hook portion from rotating downward around the hinge shaft.
[0009] By adopting the above technical solution, the staff can press the counterweight downward to rotate the lock hook around the hinge shaft, so that the barb and the matching piece are disengaged, and then the movable ladder can be unfolded by gently pushing the upper arm. When the movable ladder is folded, the matching piece first contacts the outer side of the barb, and as the movable ladder is folded, the matching piece pushes the lock hook to rotate around the hinge shaft; when the matching piece moves to the bottom of the barb, the lock hook rotates around the hinge shaft to the initial position under the action of the reset spring, and the barb is inserted into the groove on the matching piece, and the lock hook is engaged with the matching piece.
[0010] Preferably, the mounting seat comprises a base plate and a column fixedly connected to the base plate, the hinge shaft is connected to one side of the column; and the return spring is connected between the counterweight part and the base plate.
[0011] By adopting the above technical solution, the manufacturing is facilitated.
[0012] Preferably, one end of the counterweight portion away from the hook portion is fixedly connected to a foot pedal.
[0013] By adopting the above technical solution, the staff can separate the lock hook from the matching part by stepping down on the pedal, making unlocking more convenient.
[0014] Preferably, a fixing sleeve is fixedly connected to the lower side of the foot pedal; one end of the return spring is inserted into the fixing sleeve, and the other end is abutted against the upper side of the bottom plate; the return spring is made of stainless steel.
[0015] By adopting the above technical solution, the installation and removal of the reset spring are convenient. The reset spring made of stainless steel has a long service life and is corrosion-resistant.
[0016] Preferably, a spring cylinder is hinged between the mounting seat and the upper arm or between the mounting seat and the lower arm.
[0017] By adopting the technical solution, it is convenient for workers to fold up the movable ladder.
[0018] Preferably, it further comprises two guardrails, which are respectively fixedly connected to the two ends of the pedal farthest from the mounting seat, and a railing is hinged between the guardrail and the mounting seat; the guardrail and the railing are both made of aluminum alloy material.
[0019] By adopting the above technical solution, the guardrail and handrail can protect people who climb the stepladder and reduce the possibility of workers falling from both sides of the stepladder. The guardrail and handrail made of aluminum alloy material are light in weight and have good corrosion resistance.
[0020] Preferably, the lower arm is fixedly connected with a support leg on the side facing away from the upper arm away from the mounting seat, one end of the support leg away from the lower arm is fixedly connected with a rubber pad, and a support rod is connected between the support legs on the two lower arms.
[0021] By adopting the above technical solution, when the movable ladder is unfolded, the supporting legs support the top of the tank truck; the provision of the rubber pad can reduce the possibility of the tank truck roof being scratched by the movable ladder, and the rubber pad will not generate sparks when in contact with the tank truck, thereby reducing safety hazards in loading and unloading occasions such as oil products that require explosion-proof properties.
[0022] Preferably, the mounting seat, upper arm, lower arm, pedal, self-locking mechanism and matching parts are all made of aluminum alloy.
[0023] By adopting the technical solution, the weight of the movable ladder is reduced, making it easier for workers to unfold and fold the movable ladder.
[0024] Preferably, a reset detection sensor is installed on the mounting seat.
[0025] By adopting the above technical solution, after the movable ladder is reset, the reset detection sensor can send a reset signal to the control room, and the control room can notify the tank truck to safely leave the scene. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the overall structure of the movable ladder of an embodiment of the present application;
[0027] Figure 2 is a schematic diagram of a movable ladder according to an embodiment of the present application in an unfolded state;
[0028] Figure 3 is a schematic structural diagram of a movable ladder according to an embodiment of the present application;
[0029] Figure 4 yes Figure 3 Enlarged view of point A in the middle.
[0030] Explanation of the reference numerals in the accompanying drawings: 1. mounting seat; 11. base plate; 12. double-ear plate; 13. column; 2. upper arm; 3. lower arm; 31. supporting leg; 32. rubber pad; 33. supporting rod; 4. pedal; 5. reset detection sensor; 61. guardrail; 62. handrail; 7. spring cylinder; 71. hinge seat; 72. connecting block; 73. hook; 74. pin shaft; 8. self-locking mechanism; 811. hooking part; 812. counterweight part; 813. barb; 82. foot pedal; 821. fixing sleeve; 83. reset spring; 84. hinge shaft; 9. matching part; 91. slot. DETAILED DESCRIPTION
[0031] The following is combined with Figure 1-4 This application is described in further detail.
[0032] The present application discloses a reset self-locking lightweight safe intelligent movable ladder. Figure 1 The movable ladder comprises a mounting base 1, two upper arms 2 hinged on the mounting base 1, two lower arms 3 hinged on the mounting base 1, and a plurality of pedals 4 spaced between the two upper arms 2, and the pedals 4 are hinged to the two upper arms 2 and the two lower arms 3. Specifically, the mounting base 1 comprises a bottom plate 11, two double-ear plates 12 fixedly connected to the upper side of the bottom plate 11 and perpendicular to the bottom plate 11, and two columns 13 fixedly connected to the upper side of the bottom plate 11; the two upper arms 2 are respectively hinged to the upper parts of the two double-ear plates 12, and the two lower arms 3 are respectively hinged to the lower parts of the double-ear plates 12. A reset detection sensor 5 is installed at the upper end of the column 13, and the reset detection sensor 5 can be a photoelectric sensor or a travel switch.
[0033] Reference Figure 1 and Figure 2 When the movable ladder is in a folded state, the upper arm 2 and the lower arm 3 are both in a vertical state; the staff can push the upper arm 2 to rotate the upper arm 2 and the lower arm 3 around the hinge end to unfold the movable ladder; after using the movable ladder, the staff can pull the upper arm 2 to rotate the upper arm 2 and the lower arm 3 around the hinge end to fold the movable ladder. After the movable ladder is folded, the reset detection sensor 5 can send a reset signal to the control room, and the control room can notify the tank truck to safely leave the scene.
[0034] Reference Figure 1 A support leg 31 is fixedly connected to the lower arm 3 at the side away from the upper arm 2 and away from the mounting seat 1. The support leg 31 is located between the pedal 4 farthest from the mounting seat 1 and the pedal 4 second farthest from the mounting seat 1, and the support leg 31 is perpendicular to the lower arm 3; a support rod 33 is connected between the two support legs 31. A rubber pad 32 is fixedly connected to the end of the support leg 31 away from the lower arm 3. The rubber pad 32 and the support leg 31 can be connected by bolt connection, bonding, welding, etc. In this embodiment, the rubber pad 32 is bonded to the support leg 31.
[0035] Reference Figure 1 Guardrails 61 are bolted to both ends of the pedal 4 farthest from the mounting seat 1, and at least one handrail 62 (two handrails are used as an example in this embodiment) is hinged between the guardrail 61 and the column 13 on the same side of the pedal 4, wherein one handrail 62 is hinged between the upper end of the guardrail 61 and the upper end of the column 13, and the other handrail 62 is hinged between the middle of the guardrail 61 and the middle of the column 13. The guardrail 61 and handrail 62 can protect people who climb the stepladder and reduce the possibility of workers falling from both sides of the stepladder.
[0036] The provision of the guardrail 61 and the handrail 62 can protect people walking on the stepladder, making it difficult for people to fall from both sides of the stepladder.
[0037] Reference Figure 3 A spring cylinder 7 is hinged between the mounting seat 1 and the upper arm 2 or between the spring cylinder 7 and the lower arm 3. In this embodiment, the spring cylinder 7 is hinged between the mounting seat 1 and the lower arm 3 as an example. A hinge seat 71 is fixedly connected to the side of the lower part of the column 13 facing away from the pedal 4, and a connecting block 72 is fixedly connected to the side of the lower arm 3 facing away from the pedal 4. Two hooks 73 are fixedly connected to one side of the connecting block 72; one end of the spring cylinder 7 is hinged to the hinge seat 71, and the other end is between the two hooks 73, and a pivot is fixedly connected to the outside of the spring cylinder 7, and the pivot is hooked in the hook 73. When the movable ladder is in the folded state, the spring cylinder 7 is in the retracted state; when the movable ladder is gradually unfolded, the spring cylinder 7 will also be gradually stretched and stored; when the movable ladder changes from the unfolded state to the folded state, the spring cylinder 7 gradually shortens and releases its continued elastic potential energy, so that it is convenient for the staff to fold the movable ladder.
[0038] Reference Figure 3 and Figure 4 A self-locking mechanism 8 is installed on the mounting seat 1, and a matching piece 9 that is engaged with the self-locking mechanism 8 is provided on the upper arm 2 or the lower arm 3. In this embodiment, the matching piece 9 is fixed to the lower part of the upper arm 2 facing the pedal 4 as an example.
[0039] A slot 91 tilted upward is provided on the fitting 9. The self-locking mechanism 8 includes a hook lock, a foot pedal 82, a return spring 83 and a hinge shaft 84, wherein the return spring 83 is made of 304 stainless steel. The hook lock includes a hook portion 811 and a counterweight portion 812 integrally formed at one end of the hook portion 811, wherein there is a certain angle between the hook portion 811 and the counterweight portion 812, and a barb 813 adapted to the slot 91 is provided at one end of the hook portion 811 away from the counterweight portion 812. It is worth noting that the barb 813 and the counterweight portion 812 are respectively located on both sides of the hook portion 811. The hinge shaft 84 transversely penetrates the connection between the hook portion 811 and the counterweight portion 812 and hinges the lock hook to a column 13. The foot pedal 82 is welded to one side of the counterweight portion 812, and a fixing sleeve 821 is fixedly connected to the lower side of the foot pedal 82. One end of the return spring 83 is inserted into the fixing sleeve 821 , and the other end thereof is in contact with the upper side of the bottom plate 11 .
[0040] When the movable ladder is in the folded state, the barb 813 is hooked in the slot 91 of the fitting 9. When releasing the connection between the self-mechanism and the fitting 9, the staff can step on the foot pedal 82 downward to rotate the hook lock around the hinge shaft 84, so that the barb 813 is separated from the fitting 9. When the movable ladder is gradually folded from the unfolded state, the fitting 9 first contacts the outer side of the barb 813. As the movable ladder is folded, the fitting 9 pushes the lock hook to rotate around the hinge shaft 84; when the fitting 9 moves to the bottom of the barb 813, the lock hook rotates around the hinge shaft 84 to the initial position under the action of the reset spring 83, and the barb 813 is inserted into the groove on the fitting 9. The lock hook is engaged with the fitting 9, thereby locking the movable ladder to prevent the movable ladder from accidentally unfolding and causing safety accidents.
[0041] Reference Figure 1 The mounting base 1, the upper arm 2, the lower arm 3, the pedal 4, the railing 62, the guardrail 61, the hook lock, the foot pedal 82 and the matching part 9 are all made of aluminum alloy material to make the movable ladder lighter and convenient for the staff to unfold and fold the movable ladder.
[0042] The implementation principle of the reset self-locking lightweight safe intelligent movable ladder of the embodiment of the present application is as follows: in the use state, the bottom plate 11 is fixed to the trestle by expansion bolts. When the staff wants to use the movable ladder to board the tank car, the staff can step on the foot pedal 82 downward to release the connection between the self-locking mechanism 8 and the matching piece 9; then push the upper arm 2 to make the upper arm 2 and the lower arm 3 rotate around the hinge end to unfold the movable ladder, and finally make the support leg 31 support the tank car; then the staff can board the tank car through the movable ladder.
[0043] After use, the staff can pull the upper arm 2 and the lower arm 3 on the trestle to rotate around the hinged end to fold the movable ladder. When the movable ladder is folded, the self-locking mechanism 8 and the matching part 9 are automatically engaged, thereby locking the movable ladder; at the same time, the reset detection sensor 5 sends a reset signal to the control room, and the control room can notify the tank truck to safely leave the scene.
[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A reset self-locking light-weight safe intelligent movable ladder, comprising a mounting base (1), two upper arms (2) hinged on the mounting base (1), two lower arms (3) hinged on the mounting base (1), and a plurality of pedals (4) arranged between the two upper arms (2) at intervals, wherein the pedals (4) are hinged to the two upper arms (2) and the two lower arms (3); wherein: It also includes a self-locking mechanism (8) hinged on the mounting seat (1), and a matching piece (9) that is engaged with the self-locking mechanism (8) is provided on the upper arm (2) or the lower arm (3); The mating piece (9) is provided with a slot (91) with an opening facing upward; the self-locking mechanism (8) comprises a lock hook, a return spring (83) and a hinge shaft (84); the lock hook comprises a hook portion (811) and a counterweight portion (812) connected to one end of the hook portion (811); a certain angle is formed between the hook portion (811) and the counterweight portion (812); and a barb (813) adapted to the slot (91) is provided at one end of the hook portion (811) away from the counterweight portion (812); the hinge shaft (84) transversely penetrates the connection between the hook portion (811) and the counterweight portion (812) and hinges the lock hook to the mounting seat (1); the return spring (83) is connected between the counterweight portion (812) and the mounting seat (1) and prevents the hook portion (811) from rotating downward around the hinge shaft (84) by its elastic force; A spring cylinder (7) is hingedly connected between the mounting seat (1) and the upper arm (2) or between the mounting seat (1) and the lower arm (3); The mounting seat (1) comprises a base plate (11) and a column (13) fixedly connected to the base plate (11); the hinge shaft (84) is connected to one side of the column (13); the return spring (83) is connected between the counterweight (812) and the base plate (11); One end of the counterweight portion (812) away from the hook portion (811) is fixedly connected to a foot pedal (82); A fixing sleeve (821) is fixedly connected to the lower side of the foot pedal (82); one end of the return spring (83) is inserted into the fixing sleeve (821), and the other end is in contact with the upper side of the bottom plate (11); the return spring (83) is made of stainless steel.
2. A reset self-locking light-weight safe intelligent movable ladder according to claim 1, characterized in that: It also comprises two guardrails (61), the two guardrails (61) are respectively fixedly connected to the two ends of the pedal (4) farthest from the mounting seat (1), and a railing (62) is hinged between the guardrail (61) and the mounting seat (1); the guardrail (61) and the railing (62) are both made of aluminum alloy material.
3. The reset self-locking light-weight safe intelligent movable ladder according to claim 1 is characterized by: The lower arm (3) is fixedly connected to a support leg (31) on the side away from the upper arm (2) and away from the mounting seat (1); one end of the support leg (31) away from the lower arm (3) is fixedly connected to a rubber pad (32); and a support rod (33) is connected between the support legs (31) on the two lower arms (3).
4. The reset self-locking light-weight safe intelligent movable ladder according to claim 1 is characterized by: The mounting seat (1), the upper arm (2), the lower arm (3), the pedal (4), the self-locking mechanism (8) and the matching part (9) are all made of aluminum alloy material.
5. The reset self-locking light-weight safe intelligent movable ladder according to claim 1 is characterized by: A reset detection sensor (5) is mounted on the mounting seat (1).