Elevator protection structure

Abstract

The utility model discloses an elevator protection structure, which belongs to the technical field of elevator protection equipment and comprises a circle of annular guardrail mounted at the top of a floor hole through which an elevator penetrates, a guardrail door is arranged on the front side of the annular guardrail, and the right side of the guardrail door is hinged to a right upright post at the front end of the annular guardrail. An electromagnetic lock for locking the guardrail door is mounted at the top of the left side of the guardrail door. The safety protective fences are additionally arranged on the peripheries of the tops of the floor holes of the first floor and the second floor of the elevator, so that the risk of falling and the risk of being hit by falling objects can be avoided.

Description

Technical Field

[0001] The utility model relates to a hoist protection structure and belongs to the technical field of hoist protection equipment. Background Art

[0002] The elevator between production floors is mainly used for the lifting and transportation of medicines. There is no safety guardrail on the first floor of this elevator, and the entire lifting system lacks a safety interlock function. The lack of a safety guardrail on the first floor will result in no restrictions on the bottom of the elevator during operation. Personnel can enter directly under the consigned items at will, and there is a risk of being hit by objects dropped from the consigned items. The lack of a safety interlock function will result in the second-floor guardrail door being able to open freely when the elevator is placed on the first floor and not started, and the second-floor guardrail door being able to open freely when the elevator does not reach the second-floor lifting platform during operation, thus forming a "pit" without a guardrail, and there is a risk of falling into the "pit" from a high place. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a hoist protection structure to reduce the risk of falling and the risk of being hit by falling objects.

[0004] The technical solution adopted by the utility model is: a hoist protection structure, including a circular guardrail installed on the top of the floor hole through which the hoist passes, a guardrail door is arranged on the front side of the circular guardrail, the right side of the guardrail door is hinged on the right column at the front end of the circular guardrail, and an electromagnetic lock is installed on the top of the left side of the guardrail door to lock it.

[0005] Furthermore, the electromagnetic lock is connected to a controller of the hoist, and the controller is connected to a hoisting drive motor of the hoist.

[0006] Furthermore, the above-mentioned electromagnetic lock has an outer shell and an electromagnetic lock push rod. The outer shell is fixedly connected to a mounting plate, and the mounting plate is fixedly connected to the annular guardrail and is located on the front side near the guardrail door. The top of the guardrail door is hinged with an inverted U-shaped cross-section slot plate. After the left end of the slot plate is closed downward, it can be inserted into the front end of the annular guardrail. A fixed platform is connected to the upper height of the left end of the slot plate. A push rod socket is provided on the fixed platform opposite to the electromagnetic lock push rod. The electromagnetic lock push rod can be inserted into the push rod socket after being extended.

[0007] Furthermore, a limit switch is installed on the annular guardrail directly opposite to the lower side of the left end of the above-mentioned slot plate, and the limit switch generates a limit trigger signal after the slot plate is covered.

[0008] Furthermore, the above limit switch is connected to a controller.

[0009] Furthermore, the guardrail door is provided with a universal wheel near the bottom of the left end.

[0010] Beneficial effects of the utility model: Compared with the prior art, the utility model installs safety guardrails around the top of the floor holes on the first and second floors of the elevator, which can avoid the risk of falling and the risk of being hit by falling objects;

[0011] Through the driving motor of the Liandong hoist, when the electromagnetic lock is locked, the driving motor will start, realizing the safety interlocking function, greatly improving safety;

[0012] A hinged movable slot plate is installed above one end of the guardrail door lock. When the slot plate falls, it is fixed on the fixed circular guardrail on the left, so that the personnel must lift the slot plate before opening the fence. An electromagnetic lock and a mechanical limit are installed at the slot plate to interlock it with the operating status of the elevator. When the elevator has not reached that floor, the slot plate is locked by the electromagnetic lock and cannot be lifted, restricting personnel from opening the fence door. When the elevator reaches that floor, the electromagnetic lock is reset and the slot plate can be opened freely. After opening, the mechanical limit is activated and interlocked with the elevator operation, so that the elevator cannot run. The elevator can only leave that floor by closing the fence and locking the slot plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the hoist protection structure;

[0014] Figure 2 It is a schematic diagram of the overhead structure of the hoist protection structure;

[0015] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0016] Figure 4 This is the schematic diagram of the main control circuit structure;

[0017] Figure 5 It is the schematic diagram of the control loop structure;

[0018] Figure 6 This is a schematic diagram of the interlocking principle of the first and second floors. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] Example 1: Figure 1-6 As shown, a hoist protection structure includes a circular guardrail 3 installed around the top of the floor hole 2 through which the hoist 1 passes, a guardrail door 4 is arranged on the front side of the circular guardrail 3, the right side of the guardrail door 4 is hinged to the right column 5 at the front end of the circular guardrail 3 through a hinge 6, and an electromagnetic lock 7 is installed on the top of the left side of the guardrail door 4 to lock it.

[0021] Among them, the electromagnetic lock 7 has a shell 8 and an electromagnetic lock push rod 9, the shell 8 is fixedly connected to the mounting plate 10, the mounting plate 10 is fixedly connected to the annular guardrail 3 and is located at the front side near the guardrail door 4, the top of the guardrail door 4 is hinged with an inverted U-shaped cross-section slot plate 11, the left end of the slot plate 11 can be inserted into the front end of the annular guardrail 3 after it is covered downward, and the upper left end of the slot plate 11 is highly connected to a fixed platform 12, and the fixed platform 12 is provided with a push rod socket 13 opposite to the electromagnetic lock push rod 9, and the electromagnetic lock push rod 9 can be inserted into the push rod socket 13 after it is extended; a limit switch 14 is installed on the annular guardrail 3 opposite to the lower side of the left end of the slot plate 11, and the limit switch 14 generates a limit trigger signal after the slot plate 11 is covered, and a touch rod is provided on the limit switch 14, The touch rod is fixedly connected to the touch roller, and the slot plate 11 will be pressed on the touch roller after it falls, so as to realize the signal feedback of the touch switch; a hinged movable slot plate is installed above the locking end of the guardrail door. When the slot plate falls, it is fixedly stuck on the fixed annular guardrail on the left, so that the personnel must lift the slot plate before opening the fence. At the slot plate, an electromagnetic lock and a mechanical limit are installed to interlock it with the operating status of the elevator. When the elevator has not reached this floor, the slot plate is locked by the electromagnetic lock and cannot be lifted, restricting the personnel from opening the fence door. When the elevator reaches this floor, the electromagnetic lock is reset, and the slot plate can be opened freely. After opening, the mechanical limit is actuated and interlocked with the operation of the elevator, so that the elevator cannot run. Only when the fence is closed and the slot plate is locked can the elevator leave this floor.

[0022] In order to realize the linkage interlocking function, the electromagnetic lock 7 is connected to the controller of the elevator, the limit switch 14 is connected to the controller, and the controller is connected to the lifting drive motor of the elevator. Through the driving motor of the Liandong elevator, when the electromagnetic lock is locked, the drive motor is started to realize the safety interlocking function, which greatly improves safety.

[0023] like Figure 4-5 Middle: M1 lifting motor;

[0024] K1 hoist up contactor;

[0025] K2 hoist lowering contactor;

[0026] SA1 first floor protective door lock limit 14;

[0027] SA2 Second floor protection door lock limit 14;

[0028] S1 is the elevator up button on the first floor;

[0029] S2 is the elevator up button on the second floor;

[0030] S3 elevator down button on the first floor;

[0031] S4 is the elevator down button on the second floor;

[0032] SA3 elevator second floor in-place limit;

[0033] SA4 elevator one layer in place limit;

[0034] K3 electromagnetic lock 7 coils for the second floor protection door;

[0035] K4 first floor protection door electromagnetic lock 7 coils;

[0036] Control principle: The elevator works by ascending and descending from the first and second floors, and there are protective doors on the first and second floors.

[0037] The elevator is in shutdown state and on standby at the first floor. The first and second floor protective doors are closed, SA1 and SA2 are closed and connected, SA4 normally closed point is disconnected, SA4 normally open point is closed, SA3 normally open point is not connected, SA3 normally closed point is connected, K4 is connected, K3 is disconnected. At this time, the first floor protective door can be opened, but the second floor protective door cannot be opened. At this time, press S1 or S2, the elevator rises to the second floor, SA4 normally closed point is connected, SA4 normally open point is disconnected, SA3 normally closed point is disconnected, SA3 normally open point is connected, K3 is connected, K4 is disconnected, the second floor protective door can be opened, but the first floor protective door cannot be opened.

[0038] When any protective door is not closed and SA1 and SA2 are not connected, the elevator cannot rise or fall. The elevator can only rise or fall when the two protective doors are closed at the same time.

[0039] In order to reduce the supporting load at the hinge of the guardrail door during rotation, the guardrail door 4 is installed with a universal wheel 15 near the bottom of the left end. The universal wheel 15 assists in support and makes rotation more labor-saving; it also reduces the load at the hinge and increases the service life.

[0040] The above description is only a specific implementation method of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present utility model, which should be included in the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims

1. A hoist protection structure, characterized in that: The invention comprises an annular guardrail (3) installed around the top of a floor hole (2) through which a hoist (1) passes, a guardrail door (4) being arranged at the front side of the annular guardrail (3), the right side of the guardrail door (4) being hinged to a right upright post (5) at the front end of the annular guardrail (3), and an electromagnetic lock (7) being installed at the top of the left side of the guardrail door (4) for locking the guardrail door (4); the electromagnetic lock (7) comprising a housing (8) and an electromagnetic lock push rod (9), the housing (8) being fixedly connected to a mounting plate (10), and the mounting plate (10) being fixedly connected to a A slot plate (11) with an inverted U-shaped cross-section is hingedly connected to the top of the guardrail door (4) on the annular guardrail (3) and located at the front side thereof near the guardrail door (4). The left end of the slot plate (11) can be inserted into the front end of the annular guardrail (3) after being covered downwardly. A fixing platform (12) is connected to the upper portion of the left end of the slot plate (11). A push rod insertion hole (13) is provided on the fixing platform (12) opposite to the electromagnetic lock push rod (9). The electromagnetic lock push rod (9) can be inserted into the push rod insertion hole (13) after being extended.

2. The hoist protection structure according to claim 1, characterized in that: The electromagnetic lock (7) is connected to the controller of the hoist, and the controller is connected to the hoist drive motor of the hoist.

3. The hoist protection structure according to claim 2, characterized in that: A limit switch (14) is installed on the annular guardrail (3) directly opposite to the lower side of the left end of the slot plate (11), and the limit switch (14) generates a limit trigger signal after the slot plate (11) is covered.

4. The hoist protection structure according to claim 1, characterized in that: The limit switch (14) is connected to the controller.

5. A hoist protection structure according to claim 1 or 2, characterized in that: A universal wheel (15) is installed near the bottom of the left end of the guardrail door (4).

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