Safety interlocking device for bridge type travelling crane
By designing an opening and closing door with the cooperation of magnetic blocks and electromagnets and an inductive power limiting mechanism on the bridge crane, the safety hazards of the traditional bridge crane boarding ladder are solved, and the crane is stationary when the operator boards, thus ensuring the safety of the operator.
Patent Information
- Application Number
- CN202520711636.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-16
AI Technical Summary
Traditional overhead cranes lack safety doors at their boarding ramps, posing safety hazards to operators who may fall or to the crane that may suddenly move, especially when boarding.
A safety interlock device was designed, including an opening and closing door with the cooperation of a magnetic block and an electromagnet, a sensing mechanism, and a power limiting part, to ensure that the crane remains stationary when the operator boards the crane, and to disconnect the power supply to the crane motor through the sensing mechanism and the power limiting part to prevent the crane from moving.
This effectively prevents operators from falling or being crushed during the vehicle's movement, ensuring the safety of the operators.
Smart Images
Figure CN223950625U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a safety interlocking device, in particular to a safety device capable of limiting the movement of the bridge crane when the operator gets on or leaves the bridge crane, and belongs to the technical field of bridge crane safety equipment. BACKGROUND
[0002] The core function of the crane as a kind of hoisting machinery lies in the material handling; it can move in the horizontal direction and the vertical direction, and in the steel, metal processing and other industries, the crane can easily and stably and accurately transport heavy objects from one position to another position, and this efficient handling mode has been widely applied; the crane is high in position and belongs to high-altitude operation, and the cockpit is suspended at the bottom of the bridge, so the operator needs to get on the crane through the ladder opening; and the ladder opening is arranged at the end of the corridor extending out of the stand column, and the operator enters the crane cockpit through the ladder opening; however, in the actual operation process, the following risks exist: 1. the traditional ladder opening is not provided with a safety door, and the operator standing at the opening has the risk of falling due to stumbling or losing balance; 2. when getting on the crane, the crane may suddenly start or move, which may cause the operator to fall and be squeezed; therefore, a safety interlocking device is needed to ensure that the crane does not move during the operator's getting on process, and thus the personal safety of the operator is ensured. SUMMARY
[0003] The utility model aims at overcoming the defects of the prior art, and provides a safety interlocking device for a bridge crane, which can ensure that the crane is in a stationary state when the operator gets on the crane, and thus falling accidents are avoided.
[0004] The problem is solved by the following technical scheme:
[0005] A safety interlocking device for a bridge crane, comprising a first stand column, a second stand column, a swing door, a vertical baffle, a magnetic block, an electromagnet, a positioning part, a sensing mechanism and a power limiting part; the first stand column and the second stand column are respectively arranged at the two ends of the ladder opening; the vertical baffle is arranged on the end face of the first stand column away from the ladder opening, and the bottom end of the vertical baffle is provided with the electromagnet; the side wall of the swing door is hingedly arranged on the second stand column, and the bottom of the end of the side wall away from the second stand column is provided with the magnetic block, and the magnetic block and the electromagnet are located at the same vertical height; the positioning part is arranged on the vertical side wall at the outermost side of the ladder opening; the sensing mechanism is arranged on the end face of the first stand column away from the second stand column; the power limiting part is arranged on the outer wall of the bridge crane; and the signal input end of the electromagnet is connected with the signal output end of the CPU.
[0006] The aforementioned safety interlock device for bridge cranes includes a sensing mechanism comprising a rotating shaft, a connecting plate, a push rod, and a hammer column. One end of the rotating shaft is axially connected to the end face of the first column away from the second column, and the other end of the rotating shaft is axially connected to the side wall of the connecting plate. The distance between the top end of the connecting plate and the rotating shaft is greater than the distance between the bottom end of the connecting plate and the rotating shaft. The push rod is located at the bottom of the end face of the connecting plate near the second column. An arc-shaped hole is provided on the first column and the baffle assembly, and the axis of the arc-shaped hole coincides with the axis of the rotating shaft. The distance between the rotating shaft and the push rod is equal to the distance between the rotating shaft and the arc-shaped hole. The outer diameter of the push rod is smaller than the notch gap of the arc-shaped hole on the first column and the baffle assembly. The hammer column is located at the top end of the end face of the connecting plate away from the second column.
[0007] The aforementioned safety interlock device for bridge cranes includes a power limiting component comprising a pressure plate, a pressure switch, and a square base. The square base is mounted on the outer wall of the bridge crane's cab, located on one side of the cab door. A square groove is provided in the center of the square base, and the pressure plate is positioned within the square groove. A spring connects the pressure plate to the inner wall of the square groove in the square base. A pressure switch is located at the center of the inner wall of the square base. A hammer presses against the pressure plate. The signal output terminal of the pressure switch is connected to the signal input terminal of the CPU. The signal input terminals of both the main trolley motor and the auxiliary trolley motor of the bridge crane are connected to the signal output terminal of the CPU.
[0008] The aforementioned safety interlock device for bridge cranes includes a positioning component comprising a guide cylinder, a sliding column, a circular block, a pressure sensor, and an isosceles trapezoidal block. The isosceles trapezoidal block is mounted on the outer wall of the bridge crane's cab, directly below the cab door, with its long side wall connected to the outer wall of the cab. The guide cylinder is mounted on the outermost vertical side wall of the boarding ladder, and the sliding column is inserted into a hole at the end of the guide cylinder. The circular block is mounted on the end face of the sliding column away from the guide cylinder, pressing against the isosceles trapezoidal block. The pressure sensor is mounted on the inner wall of the guide cylinder. A spring connects the sliding column side wall to the inner wall of the guide cylinder. The signal output terminal of the pressure sensor is connected to the signal input terminal of the CPU.
[0009] This invention blocks the end of the boarding ladder by using an opening and closing door; through the cooperation of a magnetic block and an electromagnet, the opening and closing door can be closed tightly, and cannot be opened until the positioning part senses that the vehicle has arrived; through the cooperation of a sensing mechanism and a power limiting part, the power to the main motor and trolley motor of the bridge crane is cut off when the driver opens the opening and closing door, preventing the vehicle from moving during the driver's boarding process and ensuring the driver's personal safety. Attached Figure Description
[0010] Figure 1The utility model discloses a three -dimensional structure schematic drawing.
[0011] The list of reference numerals in the figure is: 1. first stand, 2. second stand, 3. open-close door, 4. vertical baffle, 5. magnetic block, 6. connecting plate, 7. push rod, 8. hammer column, 9. touch pressure plate, 10. square seat, 11. circular block, 12. isosceles trapezoidal block. DETAILED DESCRIPTION
[0012] Referring to Figure 1 The utility model discloses a first stand 1, second stand 2, open-close door 3, vertical baffle 4, magnetic block 5, electromagnet, positioning part, induction mechanism and limit electricity part, open open-close door 3 only can enter into the driving cabin of travelling crane, the cooperation of magnetic block 5 and electromagnet makes open-close door 3 only can open when the driving cabin door of travelling crane is aligned with the access of stairway, when the driving cabin door of travelling crane is aligned with the access of stairway, positioning part triggers signal, induction mechanism is used for sensing the open-close state of open-close door, the effect of limit electricity part is when open-close door is opened, breaks off the power supply of motor of large car and car of travelling crane, avoids the sudden movement of travelling crane when boarding.
[0013] The first stand 1 and second stand 2 are arranged at the both ends of the access of stairway respectively, the vertical baffle 4 is arranged on the end face of first stand 1 away from the access of stairway, and the bottom end is provided with electromagnet, the side wall of open-close door 3 is hingedly arranged on second stand 2, and the bottom of the end of the side wall away from second stand 2 is provided with magnetic block 5, and magnetic block 5 and electromagnet are located at the same vertical height, when open-close door 3 is closed, it is touched and pressed on the side wall of vertical baffle 4, and magnetic block 5 and electromagnet are mutually adsorbed, and then the position of open-close door 3 is fixed, so that it can not be opened, the positioning part is arranged on the vertical side wall of the outermost side of the access of stairway, the induction mechanism is arranged on the end face of first stand 1 away from second stand 2, the limit electricity part is arranged on the outer wall of bridge type travelling crane, the signal input end of electromagnet is connected with the signal output end of CPU.
[0014] The induction mechanism comprises a rotating shaft, a connecting plate 6, a push rod 7 and a hammer column 8; one end of the rotating shaft is rotatably arranged on the end surface of the first stand column 1 away from the second stand column 2, the other end of the rotating shaft is rotatably connected with the side wall of the connecting plate 6, the distance between the top end of the connecting plate 6 and the rotating shaft is greater than the distance between the bottom end of the connecting plate 6 and the rotating shaft; the connecting plate 6 can rotate around the axis of the rotating shaft; when the door is closed, it pushes the push rod 7 to rotate around the rotating shaft into the arc-shaped hole of the combination of the first stand column 1 and the vertical stop plate 4, at this time, the hammer column 8 does not contact the touch plate 9; the push rod 7 is arranged at the bottom of the end surface of the connecting plate 6 close to the second stand column 2; the combination of the first stand column 1 and the vertical stop plate 4 is provided with an arc-shaped hole, and the axis of the arc-shaped hole coincides with the axis of the rotating shaft; the distance between the rotating shaft and the push rod 7 is equal to the distance between the rotating shaft and the arc-shaped hole; the outer diameter of the push rod 7 is smaller than the gap of the arc-shaped hole on the combination of the first stand column 1 and the vertical stop plate 4; when the door is closed, it will touch the push rod 7 during the closing process and drive the push rod 7 to move synchronously, after the door is closed in place, the push rod 7 is located in the arc-shaped hole on the combination of the first stand column 1 and the vertical stop plate 4, and the hammer column is located above the rotating shaft; when the door is opened, the push rod 7 is not limited by the door, the connecting plate 6 naturally flips over under the gravity of the hammer column 8 above, so that the hammer column 8 approaches the direction of the travelling car, and the push rod 7 is lifted upward; the hammer column 8 is arranged at the top end of the end surface of the connecting plate 6 away from the second stand column 2.
[0015] The power limiting part comprises a touch plate 9, a touch switch and a square seat 10; the square seat 10 is arranged on the outer wall of the bridge travelling car cockpit, and is located on one side of the cockpit door; the center of the square seat 10 is provided with a square groove, and the touch plate 9 is arranged in the square groove of the square seat 10; the touch plate 9 and the inner wall of the square groove of the square seat 10 are connected with a spring; the center of the inner wall of the square seat 10 is provided with a touch switch; the hammer column 8 touches the touch plate 9; when the door is opened, the push rod is not limited, at this time, the connecting plate flips over, the hammer column 8 naturally flips over and presses on the touch plate 9, the gravity of the hammer column overcomes the force from the spring behind the touch plate 9, so that the touch plate 9 moves to trigger the signal of the touch switch, after the touch switch receives the trigger signal, the power supply of the main motor and the trolley motor of the travelling car is disconnected; the main car of the bridge travelling car moves longitudinally on the track on both sides of the factory building, and is dragged by the main motor; the trolley moves transversely on the guide rail on the bridge, and is dragged by the trolley motor; the signal output end of the touch switch is connected with the signal input end of the CPU; the signal input end of the main motor and the trolley motor of the bridge travelling car is connected with the signal output end of the CPU.
[0016] The positioning part comprises a guide cylinder, a slide column, a circular block 11, a pressure sensor and an isosceles trapezoidal block 12; the isosceles trapezoidal block 12 is arranged on the outer wall of the driver's cabin of the bridge crane and is located directly below the door of the driver's cabin, the long side wall of the isosceles trapezoidal block 12 is connected with the outer wall of the driver's cabin of the bridge crane, and the long side wall is the side wall of the side with a longer length except the two waist parts; the guide cylinder is arranged on the vertical side wall at the outermost side of the stairway entrance, and the slide column is inserted into the hole at the end of the guide cylinder; the circular block 11 is arranged on the end surface of the slide column away from the guide cylinder; the circular block 11 is in contact with the isosceles trapezoidal block 12; the pressure sensor is arranged on the inner wall of the guide cylinder; the spring is connected between the side wall of the slide column and the deep part of the inner wall of the guide cylinder; the signal output end of the pressure sensor is connected with the signal input end of the CPU; when the driver's cabin of the bridge crane passes through the stairway entrance, the circular block 11 first touches the isosceles trapezoidal block 12, and because the side walls on the two sides of the isosceles trapezoidal block 12 are inclined surfaces, when the driver's cabin moves synchronously with the isosceles trapezoidal block, the circular block 11 moves towards the guide cylinder under the pushing of the inclined side wall of the advancing isosceles trapezoidal block 12, and when the circular block 11 contacts the short side wall of the isosceles trapezoidal block 12, at this moment, the slide column triggers the signal of the pressure sensor, and after the pressure sensor is triggered by the signal, it is indicated that the door of the driver's cabin has been aligned with the stairway entrance; the model of the CPU module in the utility model is 87C196KC.
[0017] Principle of use: in the initial state, the opening and closing door 3 is closed, the electromagnet is powered on to adsorb the magnetic block 5 so that the opening and closing door 3 cannot be opened; at this time, the push rod 7 is located in the arc-shaped hole on the combination of the first vertical column 1 and the vertical stop plate 4; the hammer column is located above the pivot;
[0018] When the driver needs to leave the driver's cabin, the bridge crane is operated to move to the front of the stairway entrance, at this time, the isosceles trapezoidal block 12 triggers the signal of the pressure sensor, indicating that the door of the driver's cabin is aligned with the stairway entrance at this time, the electromagnet is powered off, the staff stands at the door of the driver's cabin and pushes open the opening and closing door 3, at this time, the connecting plate 6 is turned over under the gravity of the hammer column 8, the hammer column 8 is in contact with the pressure plate 9, and the pressure switch behind the pressure plate 9 triggers the signal, so that the power supply of the main motor and the trolley motor of the bridge crane is turned off, so that the bridge crane cannot move, at this time, the driver walks up the stairway entrance and safely leaves;
[0019] When the driver needs to get on the driver's cabin, the position of the traveling cabin is fine-tuned to align the cabin door with the landing stairway, at this time the isosceles trapezoidal block 12 triggers the signal of the pressure sensor, indicating that the cabin door of the driver's cabin is aligned with the landing stairway, at this time the electromagnet is powered off; the driver pulls open the door 3, at this time the connecting plate 6 is flipped under the gravity of the hammer column 8, the hammer column 8 presses on the touch plate 9, after the touch switch behind the touch plate 9 triggers the signal, the power supply of the main motor and the trolley motor of the traveling is turned off, so that the traveling cannot move, at this time the driver gets on the traveling driver's cabin, then closes the door, the door drives the push rod to move, and then drives the hammer column at the other end of the connecting plate to move away from the touch plate 9, the power supply of the main motor and the trolley motor is restored, and the traveling is normally operated.
Claims
1. A safety interlocking device for a bridge-type travelling crane, characterized by: The utility model relates to a kind of bridge crane door opening and closing device, including first column (1), second column (2), open-close door (3), vertical baffle (4), magnetic block (5), electromagnet, positioning part, sensing mechanism and limit electricity part;The first column (1) and second column (2) are respectively arranged at the both ends of the boarding ladder mouth;Vertical baffle (4) is arranged on the end face of first column (1) away from the boarding ladder mouth, and the bottom end thereof is provided with electromagnet;The side wall of open-close door (3) is hingedly arranged on second column (2), and the bottom of the end of the side wall away from second column (2) is provided with magnetic block (5), and magnetic block (5) and electromagnet are located at the same vertical height;The positioning part is arranged on the vertical side wall of the outermost side of the boarding ladder mouth;The sensing mechanism is arranged on the end face of first column (1) away from second column (2);The limit electricity part is arranged on the outer wall of bridge crane;The signal input end of electromagnet is connected with the signal output end of CPU.
2. The safety interlock for a bridge-type travelling crane according to claim 1, characterized in that: The sensing mechanism includes a rotating shaft, a connecting plate (6), a push rod (7) and a hammer column (8);One end of the rotating shaft is shaft-connected to the end face of the first column (1) away from the second column (2), the other end of the rotating shaft is shaft-connected to the side wall of the connecting plate (6), and the distance between the top end of the connecting plate (6) and the rotating shaft is greater than the distance between the bottom end of the connecting plate (6) and the rotating shaft;The push rod (7) is arranged at the end face bottom of the connecting plate (6) close to the second column (2);The first column (1) and the vertical baffle (4) combination body are provided with a circular arc hole, and the axis of the circular arc hole coincides with the axis of the rotating shaft;The distance between the rotating shaft and the push rod (7) is equal to the distance between the rotating shaft and the circular arc hole;The outer diameter of the push rod (7) is smaller than the gap of the circular arc hole on the first column (1) and the vertical baffle (4) combination body;The hammer column (8) is arranged at the top end of the end face of the connecting plate (6) away from the second column (2).
3. A safety interlock for a bridge crane as defined in claim 2 wherein: The limit electricity part includes a touch plate (9), a touch switch and a square seat (10);The square seat (10) is arranged on the outer wall of the bridge crane cab, and is located on one side of the cab door;The center of the square seat (10) is provided with a square groove, and the touch plate (9) is arranged in the square groove of the square seat (10);The touch plate (9) and the inner wall of the square groove of the square seat (10) are connected by a spring;The touch switch is arranged in the center of the inner wall of the square seat (10);The hammer column (8) touches the touch plate (9);The signal output end of the touch switch is connected with the signal input end of CPU;The signal input end of the crab motor and the trolley motor of the bridge crane is connected with the signal output end of CPU.
4. The safety interlock for a bridge crane as set forth in claim 3, wherein: The positioning part comprises a guide cylinder, a slide column, a circular block (11), a pressure sensor and an isosceles trapezoidal block (12); the isosceles trapezoidal block (12) is arranged on the outer wall of the driver's cabin of the bridge-type vehicle and is located directly below the driver's cabin door, and the long side wall of the isosceles trapezoidal block (12) is connected with the outer wall of the driver's cabin of the bridge-type vehicle; the guide cylinder is arranged on the vertical side wall at the outermost side of the boarding ladder opening, and the slide column is inserted into the hole at the end of the guide cylinder; the circular block (11) is arranged on the end surface of the slide column away from the guide cylinder; the circular block (11) is in contact pressure with the isosceles trapezoidal block (12); the pressure sensor is arranged on the inner wall of the guide cylinder; a spring is connected between the side wall of the slide column and the deep part of the inner wall of the guide cylinder; and the signal output end of the pressure sensor is connected with the signal input end of the CPU.