Safety door interlocking device

Abstract

The utility model discloses a safety door interlocking device, and belongs to the technical field of industrial safety. Comprising a safety door rotationally arranged on one side of a lifting machine box, and a protruding block is fixedly arranged on the outer side of the safety door and used for triggering the lifting machine box to be powered on when the safety door is closed; the isolation plate is fixedly arranged in the lifting machine box; the lock rod is driven by the safety door to be arranged at the top of the isolation plate in a sliding mode, and a lock block is arranged at the end, away from the safety door, of the lock rod; the safety door locking device effectively solves the problems that in the prior art, a safety door can only be locked in the elevator running process, and when the elevator stops running (such as before lifting and after lifting), due to the fact that the safety door cannot be locked, the safety door has the risk of being opened through misoperation before and after the elevator starts running, and the safety door cannot be locked. And particularly, when the elevator stops working at a high position, larger potential safety hazards exist.

Description

Technical Field

[0001] This application relates to the field of industrial safety technology, and more specifically, to a safety door interlocking device. Background Technology

[0002] Safety door interlocks are safety devices used to prevent personnel from entering hazardous areas while equipment is running. They work through an interlocking mechanism: when the safety door is opened, the equipment automatically stops operating, thus protecting the operator's safety; if the interlock fails, it may lead to equipment overload, shutdown, or even a production accident.

[0003] In related technologies, in order to solve the safety hazard problem that passengers may accidentally touch the door lock and open the safety door when the elevator is in operation, for example, the prior art patent with publication number CN218841423U provides an automatic interlocking device for the safety door of an elevator. This device controls the locking component to operate by setting a drive component, so that the safety door is normally closed and cannot be opened when the elevator is in operation, thus avoiding the safety door from suddenly opening and posing a life threat to passengers.

[0004] The existing technical solutions described above, although they can achieve the effect of the safety door suddenly opening during the operation of the elevator and posing a life-threatening threat to passengers by setting a drive component to control the action of the locking component, can only be locked during the operation of the elevator. When the elevator stops running (such as before and after the elevator starts running), the safety door cannot be locked, which leads to the risk of the safety door being opened by accident before and after the elevator starts running. In particular, when the elevator stops running at a high place and starts working, there is a greater safety hazard.

[0005] In view of this, we propose a safety door interlocking device. Utility Model Content

[0006] The purpose of this application is to provide a safety door interlocking device that can effectively solve the problem in the prior art that the safety door can only be locked during the operation of the elevator. When the elevator stops running (such as before and after the elevator starts running), the safety door cannot be locked, which leads to the risk of the safety door being opened by accident before and after the elevator starts running. This is especially true when the elevator is stopped at a high place and is being used for work, which poses a greater safety hazard.

[0007] This application provides a safety door interlocking device, comprising:

[0008] The safety door is rotatably mounted on one side of the elevator car, and a protrusion is fixedly installed on the outside of the safety door to trigger the power supply of the elevator car when the safety door is closed;

[0009] The isolation panel is fixedly installed inside the elevator box;

[0010] The locking rod is slidably mounted on the top of the isolation plate by the drive of the safety door, and a locking block is provided at the end of the locking rod away from the safety door;

[0011] A locking plate is fixedly installed on the top of the isolation plate. A counterweight is provided on the side of the locking plate away from the safety door. An insertion hole is opened on the inner side of the locking plate corresponding to the locking rod. The counterweight slides upward under the attraction force when the electromagnetic chuck is energized.

[0012] The locking block is slidably disposed inside the locking rod and automatically engages with the socket under the action of elastic force. The counterweight relies on its own weight to push the locking block to slide into the interior of the locking rod.

[0013] As an optional solution to the technical solution of this application, a sliding groove A is fixedly provided on the inner side of the isolation plate, a slider A is slidably provided on the inner side of the sliding groove A, a channel steel is fixedly provided on the inner side of the safety door, a sliding sleeve C is rotatably provided on the inner side of the channel steel, a sliding sleeve B is provided inside the sliding groove A, a rotating rod is fixedly provided between the sliding sleeve B and the sliding sleeve C, a sliding sleeve A is rotatably provided on the top of the sliding sleeve B, a push rod is fixedly provided on the outer side of the sliding sleeve A, the push rod is fixedly provided on the outer side of the slider A, and the slider A is fixedly connected to the locking rod.

[0014] As an optional solution to the technical solution of this application, one end of the locking rod has a cavity for accommodating the locking block. A baffle is fixedly installed on the side of the cavity away from the locking block. Two sliding pillars are installed inside the cavity, and both sliding pillars are slidably installed on the inner side of the baffle. Springs are installed on the outer side of each sliding pillar inside the cavity. A locking block is fixedly installed on the end of the sliding pillar away from the baffle. An inclined surface A is opened on the outer side of the locking block corresponding to the insertion hole, which is used to cooperate with the insertion hole to press the locking block into the cavity. A nut is threaded to the other end of the sliding pillar.

[0015] As an optional solution to the technical solution of this application, it also includes an electric push rod, which is fixedly installed on the top of the elevator car. An electromagnetic chuck is fixedly installed on the driving end of the electric push rod. A slider B is fixedly installed on the outside of the counterweight. The slider B is slidably installed on the inside of the slide groove B. The slide groove B is located on the outside of the power distribution box. The power distribution box is fixedly installed inside the elevator car.

[0016] The top of the locking block has an inclined surface B, which is used to cooperate with the counterweight to push the locking block to slide into the cavity.

[0017] As an optional solution to the technical solution of this application, a rotating door is rotatably provided inside the isolation plate, a fixing sleeve is fixedly provided on the outside of the rotating door, the fixing sleeve is fixedly provided on the outside of the rotating shaft, the rotating shaft is rotatably provided inside the isolation plate, a motor is provided at one end of the rotating shaft, a support plate is provided on the outside of the motor, and the support plate is fixedly provided on the top of the isolation plate.

[0018] As an optional solution to the technical solution of this application, the power distribution box is fixedly equipped with a storage battery and a microcontroller module, the inside of the lifting platform is fixedly equipped with a normally open switch corresponding to the protrusion, the inside of the lifting platform is also equipped with a normally closed switch, the outside of the normally closed switch is equipped with a protective cover, and the storage battery, normally open switch, normally closed switch, electromagnetic chuck and electric push rod are connected in series.

[0019] As an optional solution to the technical solution of this application, a right-angled cover plate is detachably provided on the outer side of the cavity. The vertical side of the right-angled cover plate is located between the nut and the baffle and is slidably disposed with the sliding column. A locking block is fixedly provided at the bottom of the horizontal side of the right-angled cover plate and is vertically inserted into the side wall of the cavity.

[0020] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0021] (1) This application uses a locking block and a socket to engage with each other. When the safety door is closed, the convex block triggers the energization of the elevator car and the electromagnetic chuck. The electromagnetic chuck lifts the counterweight upward, making room for the space outside the locking block. This causes the locking block to be spring-loaded and engage with the socket, so that the safety door remains locked after it is closed. Therefore, this effectively solves the problem in the prior art that the safety door can only be locked during the operation of the elevator. When the elevator stops running (such as before and after the elevator starts running), the safety door cannot be locked, which leads to the risk of the safety door being opened by accident before and after the elevator starts running. This is especially true when the elevator is stopped at a high place and is being used for work, which poses a greater safety hazard.

[0022] (2) This application installs a storage battery inside the distribution box, so that the storage battery, normally open switch, normally closed switch, electromagnetic chuck and electric push rod are connected in series and powered by the storage battery. If the elevator box suddenly loses power during use, the storage battery can power the normally open switch, preventing the safety door from losing its interlocking effect after the elevator box fails. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the safety door interlocking device disclosed in a preferred embodiment of this application;

[0024] Figure 2This is a schematic diagram of the internal overall structure of the safety door interlocking device disclosed in a preferred embodiment of this application;

[0025] Figure 3 This is a partial structural diagram of the internal structure of the isolation plate of the safety door interlocking device disclosed in a preferred embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the push rod structure in a preferred embodiment of the safety door interlocking device disclosed in this application;

[0027] Figure 5 This is a schematic diagram of the internal structure of the locking rod in a preferred embodiment of the safety door interlocking device disclosed in this application;

[0028] Figure 6 This is a schematic diagram of the electromagnetic chuck in a preferred embodiment of the safety door interlocking device disclosed in this application;

[0029] Explanation of the labels in the diagram: 100, elevator box;

[0030] 1. Security door; 11. Protrusion; 12. Channel steel;

[0031] 2. Isolation plate; 21. Slide groove A; 22. Slider A; 23. Push rod; 24. Rotating rod; 25. Sliding sleeve A; 26. Sliding sleeve B; 27. Sliding sleeve C;

[0032] 3. Locking rod; 31. Locking block; 311. Inclined surface A; 312. Inclined surface B; 32. Sliding column; 33. Right-angle cover plate; 34. Nut; 35. Baffle; 36. Locking block;

[0033] 4. Locking plate; 41. Counterweight; 42. Electromagnetic chuck; 43. Electric push rod; 44. Slider B; 45. Socket;

[0034] 5. Revolving door; 51. Motor; 52. Support plate; 53. Shaft; 54. Fixing sleeve;

[0035] 6. Distribution box; 61. Battery; 62. Slide rail B; 63. Normally open switch; 64. Protective cover; 65. Normally closed switch. Detailed Implementation

[0036] The present application will be further described in detail below with reference to the accompanying drawings.

[0037] Reference Figures 1-6This application discloses a safety door interlocking device, including a safety door 1, which is rotatably mounted on one side of an elevator car 100. A protrusion 11 is fixedly mounted on the outer side of the safety door 1 to trigger the elevator car 100 to be energized when the safety door 1 is closed. An isolation plate 2 is provided inside the elevator car 100. The safety door 1 drives a locking rod 3 to slide on the top of the isolation plate 2. A locking block 31 is provided at the end of the locking rod 3 away from the safety door 1. A locking plate 4 is fixedly mounted on the top of the isolation plate 2. A counterweight 41 is provided on the side of the locking plate 4 away from the safety door 1. An insertion hole 45 is provided on the inner side of the locking plate 4 corresponding to the locking rod 3. When the electromagnetic chuck 42 is energized, the counterweight 41 slides upward under the attraction force. The locking block 31 is slidably mounted inside the locking rod 3 and automatically engages with the insertion hole 45 under the action of elastic force. The counterweight 41 pushes the locking block 31 to slide into the interior of the locking rod 3 by its own weight. The system includes an electric push rod 43, which is fixedly mounted on the top of the elevator box 100. An electromagnetic chuck 42 is fixedly mounted on the drive end of the electric push rod 43. A slider B44 is fixedly mounted on the outside of the counterweight 41. The slider B44 is slidably mounted on the inside of the slide groove B62, which is located on the outside of the distribution box 6. The distribution box 6 is fixedly mounted inside the elevator box 100. A sloping surface B312 is provided on the top of the locking block 31 to cooperate with the counterweight 41 to push the locking block 31 to slide into the cavity. A battery 61 and a microcontroller module are fixedly mounted inside the distribution box 6. A normally open switch 63 is fixedly mounted on the inside of the elevator box 100 corresponding to the protrusion 11. A normally closed switch 65 is also provided inside the elevator box 100. A protective cover 64 is provided on the outside of the normally closed switch 65. The battery 61, normally open switch 63, normally closed switch 65, electromagnetic chuck 42 and electric push rod 43 are connected in series.

[0038] As safety door 1 closes, safety door 1 causes locking rod 3 to slide on top of isolation plate 2. The end of locking rod 3 away from safety door 1 slides to the side of socket 45. At this time, locking rod 3 is blocked by counterweight 41 and will not pop out.

[0039] When safety door 1 is fully closed, protrusion 11 opens normally open switch 63, enabling the elevator car 100 to connect to the working power supply and perform lifting actions. It also energizes electromagnetic chuck 42 to attract counterweight 41. With the sliding cooperation of slider B44 and slide groove B62, electric push rod 43 drives electromagnetic chuck 42 and counterweight 41 to slide upward, releasing the restriction on locking block 31. Locking block 31 is automatically engaged with socket 45 by spring force, locking safety door 1. Therefore, safety door 1 enters the locked state after closing and will not be accidentally opened before or after lifting, improving the safety of elevator car 100 during use.

[0040] After the lifting platform 100 has completed lifting or the work has ended, when it is necessary to open the safety door 1, first open the protective cover 64, press the normally closed switch 65 to de-energize the lifting platform 100 and the electromagnetic chuck 42. At this time, the counterweight 41 descends under its own weight, so that the counterweight 41 cooperates with the inclined plane B312 to press the locking block 31 to slide to the inside of the locking rod 3, so that the safety door 1 can be opened.

[0041] The battery 61, normally open switch 63, normally closed switch 65, electromagnetic chuck 42 and electric push rod 43 are connected in series and powered by the battery 61. If the elevator box 100 suddenly loses power during use, the battery 61 can power the normally open switch 63 to prevent the safety door 1 from losing its interlocking effect.

[0042] Reference Figure 2 , Figure 3 and Figure 4 A slide groove A21 is fixedly installed on the inner side of the isolation plate 2. A slider A22 is slidably installed on the inner side of the slide groove A21. A channel steel 12 is fixedly installed on the inner side of the safety door 1. A sliding sleeve C27 is rotatably installed on the inner side of the channel steel 12. A sliding sleeve B26 is installed inside the slide groove A21. A rotating rod 24 is fixedly installed between the sliding sleeve B26 and the sliding sleeve C27. A sliding sleeve A25 is rotatably installed on the top of the sliding sleeve B26. A push rod 23 is fixedly installed on the outer side of the sliding sleeve A25. The push rod 23 is fixedly installed on the outer side of the slider A22. The slider A22 is fixedly connected to the locking rod 3. A cavity for accommodating the locking block 31 is opened at one end of the locking rod 3. A baffle 35 is fixedly installed on the side of the cavity away from the locking block 31. The cavity is provided with two sliding pillars 32, both of which are slidably disposed inside the baffle 35. Springs are provided on the outer side of each sliding pillar 32 inside the cavity. A locking block 31 is fixedly disposed at the end of the sliding pillar 32 away from the baffle 35. An inclined surface A311 is provided on the outer side of the locking block 31 corresponding to the insertion hole 45, which is used to cooperate with the insertion hole 45 to press the locking block 31 into the cavity. A nut 34 is threadedly connected to the other end of the sliding pillar 32. A right-angle cover plate 33 is detachably disposed on the outer side of the cavity. The vertical side of the right-angle cover plate 33 is located between the nut 34 and the baffle 35 and is slidably disposed with the sliding pillar 32. A locking block 36 is fixedly disposed at the bottom of the horizontal side of the right-angle cover plate 33 and is vertically inserted into the side wall of the cavity.

[0043] During the closing process of safety door 1, the rotating rod 24 is driven to rotate, which in turn drives the sliding sleeve A25 to rotate, thereby driving the push rod 23 to push the slider A22, causing the slider A22 to slide inside the sliding groove A21, and pushing the locking rod 3, causing the end of the locking rod 3 away from safety door 1 to move to the side of the insertion hole 45; at this time, the inclined surface A311 on the outside of the locking block 31 can cooperate with the insertion hole 45, causing the locking block 31 to be squeezed and slide into the cavity. Subsequently, when the counterweight 41 releases the restriction on the locking block 31, the locking block 31... The slide bar 32 pops out under the elastic effect of the spring, and the nut 34 prevents the slide bar 32 from disengaging from the cavity. At the same time, it can limit the right-angle cover plate 33 to the outside of the slide bar 32. The locking block 31 engages with the insertion hole 45 to lock the safety door 1. When the safety door 1 needs to be opened, the counterweight block 41 falls and quickly squeezes the locking block 31, so that the safety door 1 can be opened. The slide bar 32, spring and right-angle cover plate 33 can be disassembled through the nut 34, which is convenient for replacing the spring and prevents the spring from deteriorating in performance during long-term use.

[0044] Reference Figure 2 , Figure 3 and Figure 4 The isolation plate 2 has a rotating door 5 inside, and a fixing sleeve 54 is fixedly installed on the outside of the rotating door 5. The fixing sleeve 54 is fixedly installed on the outside of the rotating shaft 53. The rotating shaft 53 is rotatably installed inside the isolation plate 2. A motor 51 is installed at one end of the rotating shaft 53. A support plate 52 is installed on the outside of the motor 51. The support plate 52 is fixedly installed on the top of the isolation plate 2.

[0045] The motor 51 drives the rotating shaft 53 to rotate, which in turn drives the fixed sleeve 54 to rotate, opening the rotating door 5 and facilitating the maintenance of the device on the top of the isolation plate 2.

[0046] In summary, when the safety door interlocking device disclosed in this application is in use, after the staff enters the elevator box 100, they need to close the safety door 1. At the same time as the safety door 1 is closed, the rotating rod 24 is rotated, which in turn drives the sliding sleeve A25 to rotate, further driving the push rod 23 to push the slider A22, so that the slider A22 slides inside the sliding groove A21, and pushes the locking rod 3, so that the end away from the safety door 1 moves to the side of the insertion hole 45. At this time, the locking block 31 on the side of the locking rod 3 is blocked by the counterweight block 41 and will not pop out.

[0047] When safety door 1 is fully closed, protrusion 11 opens normally open switch 63, energizing the elevator car 100 to perform lifting and lowering actions, and energizing electromagnetic chuck 42 to attract counterweight 41 to rise and make room. With the sliding cooperation of slider B44 and slide groove B62, electric push rod 43 drives electromagnetic chuck 42 and counterweight 41 to slide upward, releasing the restriction on locking block 31. Locking block 31 is automatically engaged with socket 45 by spring force, locking safety door 1. Therefore, safety door 1 enters the locked state after closing, and will not be accidentally opened before or after lifting and lowering, improving the safety of elevator car 100 during use.

[0048] After the lifting platform 100 has completed lifting or work, when it is necessary to open the safety door 1, first open the protective cover 64, press the normally closed switch 65 to de-energize the lifting platform 100. At this time, the electromagnetic chuck 42 is de-energized, and the counterweight 41 slides down under its own weight. By squeezing the inclined plane B312, the counterweight 41 squeezes the locking block 31 to slide to the inside of the locking rod 3, so that the locking block 31 is retracted into the cavity, and the safety door 1 can be fully opened.

[0049] The battery 61, normally open switch 63, normally closed switch 65, electromagnetic chuck 42 and electric push rod 43 are connected in series and powered by the battery 61. If the elevator box 100 suddenly loses power during use, the battery 61 can power the normally open switch 63 to prevent the safety door 1 from losing its interlocking effect. The normally open switch 63 and normally closed switch 65 are electrically connected to the working power supply of the elevator box 100. This electrical connection method is existing technology and will not be described in detail here.

Claims

1. A safety door interlocking device, characterized in that: Include: Safety door (1) is rotatably mounted on one side of elevator car (100). A protrusion (11) is fixedly mounted on the outside of the safety door (1) to trigger the power-on action of elevator car (100) when the safety door (1) is closed. The isolation plate (2) is fixedly installed inside the elevator box (100); The locking rod (3) is slidably mounted on the top of the isolation plate (2) by the drive of the safety door (1), and a locking block (31) is provided at the end of the locking rod (3) away from the safety door (1); The lock plate (4) is fixedly installed on the top of the isolation plate (2). A counterweight (41) is provided on the side of the lock plate (4) away from the safety door (1). An insertion hole (45) is opened on the inner side of the lock plate (4) corresponding to the lock rod (3). The counterweight (41) slides upward under the attraction force when the electromagnetic chuck (42) is energized. The locking block (31) is slidably disposed inside the locking rod (3) and automatically engages with the insertion hole (45) under the action of elastic force. The counterweight (41) relies on its own weight to squeeze the locking block (31) to slide into the inside of the locking rod (3).

2. The safety door interlocking device according to claim 1, characterized in that: The inner side of the isolation plate (2) is fixedly provided with a sliding groove A (21), and the inner side of the sliding groove A (21) is slidably provided with a slider A (22). The inner side of the safety door (1) is fixedly provided with a channel steel (12), and the inner side of the channel steel (12) is rotatably provided with a sliding sleeve C (27). The inside of the sliding groove A (21) is provided with a sliding sleeve B (26). A rotating rod (24) is fixedly provided between the sliding sleeve B (26) and the sliding sleeve C (27). The top of the sliding sleeve B (26) is rotatably provided with a sliding sleeve A (25). The outside of the sliding sleeve A (25) is fixedly provided with a push rod (23). The push rod (23) is fixedly provided outside the slider A (22). The slider A (22) is fixedly connected to the locking rod (3).

3. The safety door interlocking device according to claim 1, characterized in that: One end of the locking rod (3) has a cavity for accommodating the locking block (31). A baffle (35) is fixedly installed on the side of the cavity away from the locking block (31). Two sliding pillars (32) are installed inside the cavity. Both sliding pillars (32) are slidably installed on the inner side of the baffle (35). Springs are installed on the outer side of the sliding pillars (32) inside the cavity. The locking block (31) is fixedly installed on the end of the sliding pillar (32) away from the baffle (35). An inclined surface A (311) is opened on the outer side of the locking block (31) corresponding to the insertion hole (45) for cooperating with the insertion hole (45) to squeeze the locking block (31) into the cavity. A nut (34) is threadedly connected to the other end of the sliding pillar (32).

4. The safety door interlocking device according to claim 3, characterized in that: It also includes an electric push rod (43), which is fixedly installed on the top of the elevator car (100). An electromagnetic chuck (42) is fixedly installed on the driving end of the electric push rod (43). A slider B (44) is fixedly installed on the outside of the counterweight (41). The slider B (44) is slidably installed inside the slide groove B (62). The slide groove B (62) is located on the outside of the power distribution box (6). The power distribution box (6) is fixedly installed inside the elevator car (100). The top of the locking block (31) is provided with an inclined surface B (312), which is used to cooperate with the counterweight (41) to squeeze the locking block (31) to slide into the cavity.

5. The safety door interlocking device according to claim 2, characterized in that: The isolation plate (2) is rotatably equipped with a rotating door (5), and a fixing sleeve (54) is fixedly installed on the outside of the rotating door (5). The fixing sleeve (54) is fixedly installed on the outside of the rotating shaft (53). The rotating shaft (53) is rotatably installed inside the isolation plate (2). A motor (51) is installed at one end of the rotating shaft (53). A support plate (52) is installed on the outside of the motor (51). The support plate (52) is fixedly installed on the top of the isolation plate (2).

6. The safety door interlocking device according to claim 4, characterized in that: The power distribution box (6) is fixedly equipped with a storage battery (61) and a microcontroller module. The elevator box (100) is fixedly equipped with a normally open switch (63) corresponding to the protrusion (11) on the inner side. The elevator box (100) is also equipped with a normally closed switch (65). The normally closed switch (65) is equipped with a protective cover (64) on the outside. The storage battery (61), normally open switch (63), normally closed switch (65), electromagnetic chuck (42) and electric push rod (43) are connected in series.

7. The safety door interlocking device according to claim 3, characterized in that: A right-angle cover plate (33) is detachably provided on the outside of the cavity. The vertical side of the right-angle cover plate (33) is located between the nut (34) and the baffle (35) and is slidably provided with the sliding column (32). A locking block (36) is fixedly provided at the bottom of the horizontal side of the right-angle cover plate (33). The locking block (36) is vertically inserted into the side wall of the cavity.

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