Safety protection device for floor door of construction hoist

Abstract

The utility model relates to the technical field of elevators, in particular to a safety protection device for a floor door of a construction elevator, which comprises a guide rail bracket, a cage and a landing door, a travel limit switch is arranged on a door frame of the landing door, and the travel limit switch is electrically connected with a controller of a driving device through a circuit; a door blocking mechanism and a landing door mechanical lock are further arranged on the door frame of the landing door; only when the cage runs to the height of the floor where the cage is located, the mechanical lock of the landing door of the floor is opened, the stop door mechanism of the floor can be opened, and after the stop door mechanism is opened, the landing door can be opened; meanwhile, in the opening process of the door blocking mechanism, the stroke limiting switch is triggered to act, and after a controller of the driving device receives a signal, the driving device is controlled to be powered off and stop running, so that accidents caused by cage starting in the opening state of the landing door are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to a safety protection device for a floor door of a construction elevator. Background Art

[0002] At present, in the construction field, construction elevator floor door safety protection devices (i.e., installing a travel limit switch on the floor door to contact the flat iron welded on the aisle frame, so that the travel limit switches of adjacent floors are connected in series to form a loop) are widely used in the field of construction, but the protection cost, protection effect and construction difficulty are uneven. Moreover, this safety protection device is just a formality. During the use of the construction elevator, the floor door is often not closed properly or blown open by the wind, and the construction elevator operator or other personnel must close the floor door. In addition, due to human factors, the floor door often fails to close properly, is blown open by the wind or other situations, and the floor door is often in an open state, which can easily cause people or objects to fall, posing a great safety hazard. Utility Model Content

[0003] The utility model aims to solve the above problems, thereby providing a construction elevator floor door safety protection device.

[0004] The utility model solves the above problems and adopts the following technical solutions:

[0005] A construction elevator floor door safety protection device comprises an elevator guide rail frame and a cage mounted on the guide rail frame, the cage can be moved on the guide rail frame by being driven by a driving device, each floor passage is also provided with a floor door at a port on one side of the cage, and also comprises a door-blocking mechanism, which is arranged on a door frame of the floor door; a travel limit switch is also arranged on the door frame, the triggering of the travel limit switch is controlled by the opening and closing of the door-blocking mechanism, and the travel limit switch is electrically connected to the controller of the driving device through a circuit; a floor door mechanical lock capable of limiting the door-blocking mechanism is also arranged on the door frame.

[0006] Compared with the prior art, the utility model adopting the above technical solution has the following outstanding features:

[0007] The utility model is provided with a mechanical lock for the floor door. Only when the cage runs to the height of the floor where it is located, the mechanical lock of the floor door on that floor is opened and the door-blocking mechanism on that floor can be opened. After the door-blocking mechanism is opened, the floor door can be opened. At the same time, during the opening process of the door-blocking mechanism, the travel limit switch is triggered. After the controller of the driving device receives the signal, it controls the driving device to cut off the power and stop running, so as to prevent accidents when the cage is started when the floor door is open.

[0008] As a preferred embodiment, a further technical solution of the utility model is:

[0009] The door-blocking mechanism includes a first ear plate and a second ear plate arranged on the door frame, a same rotating rod is hinged between the first ear plate and the second ear plate, the rotating rod is horizontally located on the floor door opening side of the door frame, and the height thereof is higher than the floor door height, a door-blocking plate is arranged on the rotating rod, and the bottom end of the driving rod of the travel limit switch is located within the flipping path of the door-blocking plate.

[0010] The mechanical lock of the floor door includes a door-shaped frame fixed on the rotating rod, a locking arm is hinged on the door-shaped frame, the end of the locking arm extends obliquely upward to the rotating rod and is provided with a roller; a clamping plate is provided on the second ear plate, and a clamping block used in conjunction with the clamping plate is integrally formed below the locking arm; during the operation of the cage, the clamping block cooperates with the clamping plate to prevent the rotating rod from rotating, and the door blocking plate droops under the action of its own weight to block the door, so that the floor door cannot be opened.

[0011] A protrusion is integrally formed at the lower end of the locking arm near the door frame; when the floor door is closed and the cage runs away from the height of the floor, the door stop plate sags under the action of its own weight, driving the rotating rod to rotate, and then retracting the locking arm. During the retraction of the locking arm, the protrusion is located above the rotating rod and contacts the rotating rod, ensuring that the height of the card block is higher than the height of the card plate during the retraction of the locking arm. After the protrusion is separated from the rotating rod, the locking arm falls under the action of its own weight, and the card block is stuck on the side of the card plate near the opening of the floor door.

[0012] A collision plate is installed on the cage for use with the mechanical lock of the floor door. The upper and lower ends of the collision plate are inclined surfaces. When the cage rises or descends to the height of the floor, the collision plate squeezes the roller to lift the lock arm upward to unlock it.

[0013] The roller and the locking arm are connected by a connecting piece, and the connecting piece and the locking arm can be telescopically matched; the length can be easily adjusted so that the floor door mechanical lock can adapt to the different distances between the floor door and the cage for use.

[0014] The connecting piece includes clamping plates arranged on both sides of the locking arm, a sliding groove matching the width of the clamping plate is opened on the locking arm, a threaded hole is opened in the sliding groove of the locking arm, and a long hole is opened along the length direction of the clamping plate. The clamping plate is fixed to the locking arm by bolts, and the bolts pass through the long holes and are screwed into the threaded holes. The roller is hinged between the ends of the two clamping plates; the clamping plate can slide in the sliding groove, and the side wall of the sliding groove plays a limiting role on the clamping plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of an embodiment of the utility model;

[0016] Figure 2 For the utility model embodiment Figure 1 A local enlarged structural diagram of part A;

[0017] Figure 3 For the utility model embodiment Figure 1A schematic diagram of the local enlarged structure of part B in FIG.

[0018] Figure 4 This is a schematic diagram of the structure of the landing door in the open state of an embodiment of the utility model;

[0019] Figure 5 For the utility model embodiment Figure 4 A schematic diagram of the local enlarged structure of part C in FIG.

[0020] Marked in the figure are: floor door 1, door frame 2, first ear plate 3, second ear plate 4, rotating rod 5, door stop plate 6, travel limit switch 7, floor door mechanical lock 8, collision plate 9, driving rod 7-1, door frame 8-1, locking arm 8-2, roller 8-3, card plate 8-4, card block 8-5, protrusion 8-6, connecting piece 8-7. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0022] See also Figure 1-Figure 3 A construction elevator floor door safety protection device comprises an elevator guide rail frame and a cage installed on the guide rail frame, the cage can be moved on the guide rail frame by being driven by a driving device, and each floor passage is also provided with a floor door 1 at the port on one side of the cage, and also comprises a door-blocking mechanism, which is arranged on a door frame 2 of the floor door 1; a travel limit switch 7 is also arranged on the door frame 2, and the triggering of the travel limit switch 7 is controlled by the opening and closing of the door-blocking mechanism, and the travel limit switch 7 is electrically connected to the controller of the driving device through a circuit; a floor door mechanical lock 8 capable of limiting the door-blocking mechanism is also arranged on the door frame 2.

[0023] The door-blocking mechanism includes a first ear plate 3 and a second ear plate 4 arranged on the door frame 2, and a same rotating rod 5 is hinged between the first ear plate 3 and the second ear plate 4. The rotating rod 5 is horizontally located on the opening side of the floor door 1 of the door frame 2, and its height is higher than the height of the floor door 1. A door-blocking plate 6 is arranged on the rotating rod 5, and the bottom end of the driving rod 7-1 of the travel limit switch 7 is located within the flipping path of the door-blocking plate 6.

[0024] The mechanical lock 8 for the floor door includes a door frame 8-1 fixed on the rotating rod 5, a locking arm 8-2 is hinged on the door frame 8-1, the end of the locking arm 8-2 extends obliquely upward from the rotating rod 5, and is provided with a roller 8-3; a clamping plate 8-4 is provided on the second ear plate 4, and a clamping block 8-5 used in conjunction with the clamping plate 8-4 is integrally formed below the locking arm 8-2; during the operation of the cage, the clamping block 8-5 cooperates with the clamping plate 8-4 to prevent the rotating rod 5 from rotating, and the door blocking plate 6 droops under the action of its own weight to block the door, so that the floor door 1 cannot be opened.

[0025] A protrusion 8-6 is integrally formed below one end of the locking arm 8-2 near the door frame 2; when the floor door 1 is closed and the cage runs away from the height of the floor, the door baffle 6 droops under the action of its own weight, driving the rotating rod 5 to rotate, and then retrieving the locking arm 8-2. During the retrieving process of the locking arm 8-2, the protrusion 8-6 is located above the rotating rod 5 and in contact with the rotating rod 5, ensuring that the height of the block 8-5 is higher than the height of the card plate 8-4 during the retrieving process of the locking arm 8-2. After the protrusion 8-6 is separated from the rotating rod 5, the locking arm 8-2 falls under the action of its own weight, and the block 8-5 is stuck on the side of the card plate 8-4 near the opening of the floor door 1.

[0026] A collision plate 9 is installed on the cage for use with the mechanical lock 8 of the floor door. The upper and lower ends of the collision plate 9 are inclined surfaces. When the cage rises or descends to the height of the floor, the collision plate 9 squeezes the roller 8-3, so that the locking arm 8-2 is lifted upward to unlock.

[0027] The roller 8-3 and the locking arm 8-2 are connected by a connecting piece 8-7, and the connecting piece 8-7 and the locking arm 8-2 are telescopically matched, so that the length can be adjusted so that the floor door mechanical lock 8 can adapt to the different distances between the floor door 1 and the cage for use.

[0028] The connecting member 8-7 includes splints arranged on both sides of the locking arm 8-2, a sliding groove adapted to the width of the splint is opened on the locking arm 8-2, a threaded hole is opened in the sliding groove of the locking arm 8-2, and a long hole is opened on the splint along the length direction. The splint is fixed to the locking arm 8-2 by bolts, and the bolts pass through the long holes and are screwed into the threaded holes. The roller 8-3 is hinged between the ends of the two splints; the splint can slide in the sliding groove, and the side walls of the sliding groove limit the splint.

[0029] The utility model is provided with a mechanical lock for the floor door. Only when the cage runs to the height of the floor where it is located, the mechanical lock of the floor door on that floor is opened and the door-blocking mechanism on that floor can be opened. After the door-blocking mechanism is opened, the floor door can be opened. At the same time, during the opening process of the door-blocking mechanism, the travel limit switch is triggered. After the controller of the driving device receives the signal, it controls the driving device to cut off the power and stop running, so as to prevent accidents when the cage is started when the floor door is open.

[0030] The above description is only a preferred feasible embodiment of the present utility model, and does not limit the scope of rights of the present utility model. All equivalent changes made using the contents of the present utility model specification and its drawings are included in the scope of rights of the present utility model.

Claims

1. A construction elevator floor door safety protection device, comprising a guide rail frame of the elevator and a cage installed on the guide rail frame, the cage can be moved on the guide rail frame by the drive of a driving device, and each floor passage is also provided with a floor door at a port on one side of the cage, characterized in that: It also includes a door-blocking mechanism, which is arranged on the door frame of the floor door; a travel limit switch is also arranged on the door frame, and the triggering of the travel limit switch is controlled by the opening and closing of the door-blocking mechanism. The travel limit switch is electrically connected to the controller of the driving device through a circuit; a floor door mechanical lock capable of limiting the door-blocking mechanism is also arranged on the door frame.

2. A construction elevator floor door safety protection device according to claim 1, characterized in that: The door-blocking mechanism includes a first ear plate and a second ear plate arranged on the door frame, a same rotating rod is hinged between the first ear plate and the second ear plate, the rotating rod is horizontally located on the floor door opening side of the door frame, and the height thereof is higher than the floor door height, a door-blocking plate is arranged on the rotating rod, and the bottom end of the driving rod of the travel limit switch is located within the flipping path of the door-blocking plate.

3. A construction elevator floor door safety protection device according to claim 2, characterized in that: The mechanical lock of the landing door includes a door-shaped frame fixed on the rotating rod, a locking arm is hinged on the door-shaped frame, the end of the locking arm extends obliquely upward of the rotating rod and is provided with a roller; a clamping plate is provided on the second ear plate, and a clamping block used in conjunction with the clamping plate is integrally formed below the locking arm.

4. A construction elevator floor door safety protection device according to claim 3, characterized in that: A protrusion is integrally formed below one end of the locking arm close to the door-shaped frame.

5. A construction elevator floor door safety protection device according to claim 3, characterized in that: A collision plate is installed on the cage for use with the mechanical lock of the floor door, and the upper and lower ends of the collision plate are inclined surfaces.

6. A construction elevator floor door safety protection device according to claim 3, characterized in that: The roller and the locking arm are connected via a connecting piece, and the connecting piece and the locking arm can be telescopically matched.

7. A construction elevator floor door safety protection device according to claim 6, characterized in that: The connecting part includes clamping plates arranged on both sides of the locking arm, a sliding groove adapted to the width of the clamping plates is opened on the locking arm, a threaded hole is opened in the sliding groove of the locking arm, and a long hole is opened on the clamping plate along the length direction. The clamping plate is fixed to the locking arm by bolts, and the bolts pass through the long holes and are screwed into the threaded holes. The roller is hinged between the ends of the two clamping plates.

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