Goods elevator lifting safety device

Abstract

The utility model relates to the technical field of lifting elevators, and provides a goods elevator lifting safety device which comprises a goods elevator support, a lifting platform, a floor number key panel, an MCU, a safety warning assembly and a door fence. The lifting table is slidably connected with the goods elevator support and provided with a first shading plate. The goods elevator support is provided with an entrance, and the door fence is hinged to the entrance and provided with a second shading plate. The safety warning assembly comprises a normally-open control switch, a normally-closed control switch, a first photoelectric position sensor, a second photoelectric position sensor and an alarm. The safety warning device has the advantages that the safety warning assemblies are arranged at the entrances and exits of the goods elevator supports, and when the lifting platform leaves the entrances and exits of the goods elevator supports and the door fence is not closed normally, the alarm gives out an alarm signal to remind workers, so that the safety is improved; however, when the lifting platform stops on the specified floor and the goods elevator door fence of the specified floor is opened, the alarm of the specified floor does not send out an alarm signal.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting elevators, and in particular to a lifting safety device for a freight elevator. Background Art

[0002] An elevator is a vertical lift powered by an electric motor, used to carry passengers or goods in multi-story buildings. Elevators, especially freight elevators for carrying goods, have been widely used in factories. Traditional factory freight elevators, in order to save costs, limit the space occupied by the freight elevator, and are mainly used for carrying goods, the door rails at the entrance and exit of the freight elevator are opened or closed by manually operating the lock bolt.

[0003] When the lift platform of the freight elevator reaches the first floor, the staff will open the gate on the first floor, move the goods to the lift platform through the entrance and exit of the freight elevator bracket, and then close the gate. The lift platform will transport the goods to the designated floor. When the lift platform reaches the designated floor, the gate of the freight elevator on the designated floor is closed. The gate prevents the goods in the lift platform from falling out of the lift platform due to external vibrations and other factors. In this case, the staff needs to manually open the gate of the freight elevator on the designated floor, take the goods out of the lift platform, and then close the gate.

[0004] When the staff is careless and fails to close the door rail normally, the lifting platform leaves the entrance and exit of the freight elevator support, and it is easy for the staff to not notice that the door rail is open and fall into the freight elevator and get injured; it is also easy for the staff to accidentally touch items in the corridor, such as carts, and the items move from the open door rail into the freight elevator, causing damage to the items; the safety is low.

[0005] Therefore, how to ensure that when the lift platform leaves the entrance and exit of the freight elevator support and the door gate is not closed normally, the alarm sends out an alarm signal to remind the staff, but when the lift platform stops at a designated floor and the freight elevator door gate on the designated floor is opened, the alarm on the designated floor does not send out an alarm signal. This is a technical problem that needs to be urgently solved in this field. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a freight elevator lifting safety device. When the lifting platform leaves the entrance and exit of the freight elevator support and the door railing is not closed normally, the alarm sends out an alarm signal to remind the staff. However, when the lifting platform stops at a designated floor and the freight elevator door railing of the designated floor is opened, the alarm on the designated floor does not send out an alarm signal.

[0007] The utility model is implemented as follows: a cargo elevator lifting safety device, comprising:

[0008] Cargo elevator bracket, lifting platform, floor key panel, MCU, safety warning components and door rails;

[0009] The lifting platform is slidably connected to the cargo elevator bracket, and the lifting platform has a first shading plate;

[0010] The freight elevator bracket is provided with an entrance and exit, the door rail is hinged to the entrance and exit, and the door rail has a second sunshade;

[0011] The safety warning assembly includes a normally open control switch, a normally closed control switch, a first photoelectric position sensor, a second photoelectric position sensor and an alarm;

[0012] The first photoelectric position sensor is fixedly arranged at the entrance and exit, the detection end of the first photoelectric position sensor is used to detect the first shading plate, the feedback end of the first photoelectric position sensor is connected to the input end of the normally open control switch through a first wire, the output end of the normally open control switch is connected to the control end of the normally closed control switch through a second wire, the second photoelectric position sensor is fixedly arranged at the entrance and exit, the detection end of the second photoelectric position sensor is used to detect the second shading plate, the feedback end of the second photoelectric position sensor is connected to the input end of the normally closed control switch through a third wire, and the output end of the normally closed control switch is connected to the alarm through a fourth wire;

[0013] The MCU is connected to the control end of the normally open control switch through a fifth wire, the number of floors key panel is connected to the MCU through a sixth wire, and the number of floors key panel is fixedly arranged on the freight elevator bracket;

[0014] The plurality of entrances and exits are arranged at intervals along the height direction of the freight elevator support, and the number of the entrances and exits is consistent with the number of the safety warning components, the number of the door bars, and the number of the floor button panels.

[0015] Furthermore, the normally open control switch is an NPN transistor, and the normally closed control switch is a PNP transistor.

[0016] Furthermore, the normally open control switch is a normally open relay, and the normally closed control switch is a normally closed relay.

[0017] Furthermore, it also includes a lock bolt, and the door fence and the entrance and exit are also connected through the lock bolt.

[0018] Furthermore, the detection end of the first photoelectric position sensor is divided into a light emitting end and a light receiving end, and the first light shielding plate can pass between the light emitting end and the light receiving end.

[0019] Furthermore, the number of the entrances and exits is four.

[0020] Compared with the background technology, the advantages of the utility model are as follows: a safety warning component is set at the entrance and exit of each freight elevator support, and the floor number button panel sends the designated floor signal of the lift to the MCU, and the MCU changes the normally open control switch located on the designated floor to a closed state; when the lift leaves the entrance and exit of the freight elevator support, the first photoelectric position sensor of the safety warning component of all floors does not detect the lift. At this time, if the second photoelectric position sensor detects that the door fence is not closed normally, it will feedback a signal to the alarm, and the alarm will send an alarm signal to remind the staff, and the staff will manually close the freight elevator door fence to improve safety; but when the lift stops at the entrance and exit of the freight elevator on the designated floor, the first photoelectric position sensor on the designated floor detects the lift and feeds back a signal to the control end of the normally closed control switch, and the normally closed control switch is changed to a disconnected state. At this time, when the staff opens the freight elevator door fence on the designated floor, the feedback signal of the second photoelectric position sensor on the designated floor is disconnected, and the alarm on the designated floor does not send an alarm signal. The staff takes the goods out of the lift or moves the goods into the lift, which requires the door fence to be in an open state, thereby avoiding the alarm signal interfering with the normal logistics operations of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0022] Figure 1 It is a structural schematic diagram of the cargo elevator lifting safety device of the present utility model.

[0023] Figure 2 It is a connection diagram of the safety warning component, MCU and layer number button panel in the embodiment of the utility model.

[0024] Figure 3 It is a schematic diagram of the positions of the lifting platform and the first photoelectric position sensor in the embodiment of the utility model.

[0025] Figure 4 It is a schematic diagram of the positions of the freight elevator bracket, door railing and lock bolt in the embodiment of the utility model.

[0026] Figure 5 It is a schematic diagram of the second photoelectric position sensor detecting that the door barrier is not closed normally in the embodiment of the utility model.

[0027] Figure numerals: freight elevator bracket 1; entrance and exit 11; lifting platform 2; first sunshade 21; cart 22; floor number button panel 3; MCU4; safety warning component 5; normally open control switch 51; normally closed control switch 52; first photoelectric position sensor 53; light emitting end 531; light receiving end 532; second photoelectric position sensor 54; alarm 55; door rail 6; second sunshade 61; bolt 7; first floor 81; second floor 82; third floor 83; fourth floor 84. DETAILED DESCRIPTION

[0028] The embodiment of the utility model provides a freight elevator lifting safety device, which overcomes the shortcomings of the background technology that the door railing of the freight elevator is not closed normally, which makes it easy for workers to fall into the freight elevator and get injured, and for objects to fall into the freight elevator and get damaged, thereby reducing safety. The device achieves the technical effect that when the lifting platform leaves the entrance and exit of the freight elevator support and the door railing is not closed normally, the alarm sends out an alarm signal to remind the staff, thereby improving safety. However, when the lifting platform stops at a designated floor and the freight elevator door railing of the designated floor is opened, the alarm of the designated floor does not send out an alarm signal, thereby avoiding the technical effect that the alarm signal interferes with the normal logistics operations of the staff.

[0029] The overall idea of ​​the technical solution of the embodiment of the utility model is as follows:

[0030] A freight elevator support, a lifting platform, a floor number key panel, an MCU, a safety warning component and a door rail are provided; the safety warning component includes a normally open control switch, a normally closed control switch, a first photoelectric position sensor, a second photoelectric position sensor and an alarm. The staff sends the signal of the designated floor to the lifting control system of the freight elevator through the floor number key panel, and the lifting control system drives the lifting platform to move in the direction of the designated floor, and the lifting platform stays on the designated floor. The floor number key panel also sends the signal of the designated floor where the lifting platform stops to the MCU, and the MCU changes the normally open control switch located on the designated floor into a closed state. At this time, when the first photoelectric position sensor located at the entrance and exit of the freight elevator on the designated floor detects that the lifting platform is in place, the feedback signal of the first photoelectric position sensor can smoothly reach the control end of the normally closed control switch, so that the normally closed control switch becomes disconnected, so that the staff on the designated floor opens the door rail and takes the goods out of the lifting platform or moves the goods into the lifting platform; when the second photoelectric position sensor detects that the door rail is opened, the feedback signal will not be transmitted to the alarm on the designated floor because it is disconnected, thereby avoiding the alarm signal interfering with the normal logistics operation of the staff. The normally open control switches on other floors are still in the open state, and the normally closed control switches are still in the closed state. Therefore, when the freight elevator door barriers on other floors are not closed normally, the feedback signals of the second photoelectric position sensors on other floors will be sent to the alarm, and the alarm will send out an alarm signal to notify the staff on other floors.

[0031] When the lift platform leaves the entrance and exit of the freight elevator support, the first photoelectric position sensors of the safety warning components on all floors do not detect the lift platform, and accordingly, the normally closed control switches of the safety warning components on all floors are in a closed state. At this time, the freight elevator door railing on a certain floor is not closed normally and is detected by the second photoelectric position sensor on this floor. The feedback signal of the second photoelectric position sensor on this floor reaches the alarm on this floor, and the alarm sends out an alarm signal to notify the staff on this floor.

[0032] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] See also Figures 1 to 5 , a preferred embodiment of the utility model.

[0034] A cargo elevator lifting safety device, comprising:

[0035] Cargo elevator bracket 1, lifting platform 2, floor number button panel 3, MCU 4, safety warning component 5 and door rail 6;

[0036] The lifting platform 2 is slidably connected to the cargo elevator support 1, and the lifting platform 2 has a first shading plate 21;

[0037] The cargo elevator support 1 is provided with an entrance and exit 11, the door fence 6 is hinged to the entrance and exit 11, and the door fence 6 has a second sunshade 61;

[0038] The safety warning component 5 includes a normally open control switch 51, a normally closed control switch 52, a first photoelectric position sensor 53, a second photoelectric position sensor 54 and an alarm 55;

[0039] The first photoelectric position sensor 53 is fixedly arranged at the entrance and exit 11, the detection end of the first photoelectric position sensor 53 is used to detect the first shading plate 21, the feedback end of the first photoelectric position sensor 53 is connected to the input end of the normally open control switch 51 through a first wire, the output end of the normally open control switch 51 is connected to the control end of the normally closed control switch 52 through a second wire, the second photoelectric position sensor 54 is fixedly arranged at the entrance and exit 11, the detection end of the second photoelectric position sensor 54 is used to detect the second shading plate 61, the feedback end of the second photoelectric position sensor 54 is connected to the input end of the normally closed control switch 52 through a third wire, and the output end of the normally closed control switch 52 is connected to the alarm 55 through a fourth wire;

[0040] The MCU4 is connected to the control end of the normally open control switch 51 through a fifth wire, the number of floors key panel 3 is connected to the MCU4 through a sixth wire, and the number of floors key panel 3 is fixedly arranged on the cargo elevator bracket 1;

[0041] The plurality of entrances and exits 11 are arranged at intervals along the height direction of the freight elevator support 1 , and the number of the entrances and exits 11 is consistent with the number of the safety warning components 5 , the number of the door bars 6 , and the number of the floor button panels 3 .

[0042] The utility model is provided with a safety warning component 5 at the entrance and exit 11 of each freight elevator support 1, and the floor number key panel 3 sends a signal of the designated floor where the lifting platform 2 stops to the MCU4, and the MCU4 changes the normally open control switch 51 located at the designated floor into a closed state; when the lifting platform 2 leaves the entrance and exit 11 of the freight elevator support 1, the first photoelectric position sensor 53 of the safety warning component 5 of all floors does not detect the lifting platform 2. At this time, if the second photoelectric position sensor 54 detects that the door fence 6 is not closed normally, a feedback signal is sent to the alarm 55, and the alarm 55 sends an alarm signal to remind the staff, and the staff manually closes the freight elevator door fence 6, and the staff manually closes the freight elevator door fence 6. High security; however, when the lift 2 stops at the freight elevator entrance 11 of the designated floor, the first photoelectric position sensor 53 of the designated floor detects the lift 2 and feeds back the signal to the control end of the normally closed control switch 52, turning the normally closed control switch 52 into an open state. At this time, when the staff opens the freight elevator door 6 of the designated floor, the feedback signal of the second photoelectric position sensor 54 of the designated floor is disconnected, and the alarm 55 of the designated floor does not send out an alarm signal. The staff takes the goods out of the lift 2 or moves the goods into the lift 2, which requires the door 6 to be in an open state, thereby avoiding the alarm signal interfering with the normal logistics operations of the staff.

[0043] The normally open control switch 51 is an NPN transistor, and the normally closed control switch 52 is a PNP transistor. The input end of the normally open control switch 51 corresponds to the collector of the NPN transistor, the output end of the normally open control switch 51 corresponds to the emitter of the NPN transistor, and the control end of the normally open control switch 51 corresponds to the base of the NPN transistor. When MCU4 sends a low-level signal to the base of the NPN transistor, the NPN transistor is cut off (i.e., disconnected); when MCU5 sends a high-level signal to the base of the NPN transistor, the NPN transistor is turned on (i.e., closed). The input end of the normally closed control switch 52 corresponds to the collector of the PNP transistor, the output end of the normally closed control switch 52 corresponds to the emitter of the PNP transistor, and the control end of the normally closed control switch 52 corresponds to the base of the PNP transistor; when the normally open control switch 51, i.e., the NPN transistor, is in the cut-off state, the base of the PNP transistor is at a low level, and the PNP transistor is turned on (i.e., closed); when the NPN transistor is in the on state, if the first photoelectric position sensor detects the first shading plate, the first photoelectric position sensor sends a high level signal to the base of the PNP transistor, and the PNP transistor is cut off (i.e., disconnected); if the first photoelectric position sensor does not detect the first shading plate, the first photoelectric position sensor sends a low level signal, and the PNP transistor is turned on (i.e., closed).

[0044] Or the normally open control switch 51 is a normally open relay, and the normally closed control switch 52 is a normally closed relay. A normally open relay is one in which the two contacts of the relay remain in an open state when the coil is not energized; when the coil is energized, the two contacts of the relay are closed. A normally closed relay is one in which the two contacts of the relay remain in a closed state when the coil is not energized; when the coil is energized, the two contacts of the relay are open.

[0045] The door 6 and the entrance 11 are also connected by the lock bolt 7. The staff can lock or unlock the door 6 by operating the lock bolt 7. Figure 4 Two left and right door bars 6 are set at an entrance and exit 11, and the two door bars 6 are connected by a lock bolt 7; two second photoelectric position sensors 54 are set at an entrance and exit 11, and the two second photoelectric position sensors 54 on the same floor respectively detect the switch status of the two door bars 6 on the same floor.

[0046] The detection end of the first photoelectric position sensor 53 is divided into a light emitting end 531 and a light receiving end 532, and the first light shielding plate 21 can pass between the light emitting end 531 and the light receiving end 532. When the first light shielding plate 21 is located between the light emitting end 531 and the light receiving end 532 of the first photoelectric position sensor 53, since the light is blocked, the first photoelectric position sensor 53 detects the first light shielding plate 21, that is, detects that the lifting platform 2 has reached the corresponding position of the freight elevator entrance and exit, and the first photoelectric position sensor 53 feeds back a signal. When the first light shielding plate 21 leaves between the light emitting end 531 and the light receiving end 532 of the first photoelectric position sensor 53, since the light is not blocked, the first photoelectric position sensor 53 does not feed back a signal.

[0047] The detection end of the second photoelectric position sensor 54 is also divided into a light emitting end and a light receiving end.

[0048] The number of the entrances and exits is four. There are four floors, namely the first floor 81, the second floor 82, the third floor 83 and the fourth floor 84. There are four safety warning components 5, four door bars 6, and four floor number key panels 3. There is one MCU4. MCU4 can also be the lifting control system of the prior art freight elevator.

[0049] Working mode of the utility model:

[0050] (1) Initially, the door rails 6 of the four floors are in a closed state, and the MCU4 sends a signal to close the normally open control switch 51 of the first floor 81, while the normally open control switches of the other three floors are in an open state. The lift 2 stops at the first floor 81, and the first photoelectric position sensor 53 of the first floor 81 detects that the lift 2 is in place. The feedback signal passes through the normally open control switch 51 to the control end of the normally closed control switch 52, causing the normally closed control switch 52 to become an open state. The normally closed control switches of the other three floors are in a closed state.

[0051] (2) The staff on the first floor 81 opens the gate 6 and uses the cart 22 to transport the goods to the lift 2. Since the normally closed control switch 52 on the first floor 81 is in the disconnected state, when the second photoelectric position sensor 54 detects that the gate 6 is opened, the feedback signal of the second photoelectric position sensor 54 does not reach the alarm 55, and the alarm 55 on the first floor 81 does not send out an alarm signal, thereby preventing the alarm signal from interfering with the normal logistics operations of the staff. After placing the goods on the lift 2, the staff closes the gate 6.

[0052] At this time, if the staff on the second floor 82 opens the door gate 6, the second photoelectric position sensor on the second floor 82 detects that the door gate is opened, and the signal fed back by the second photoelectric position sensor reaches the alarm through the normally closed control switch. The alarm sends an alarm signal to remind the staff on the second floor 82 that the door gate is not closed normally.

[0053] (3) The staff member on the first floor 81 operates the floor number button panel 3 and selects the button representing the third floor 83. The floor number button panel 3 sends the selection signal to MCU4, and MCU4 changes the normally open control switch of the third floor 83 to a closed state, and keeps the normally open control switches of other floors in an open state.

[0054] The floor number key panel 3 also sends the selected signal to the lifting control system of the freight elevator, and the lifting control system drives the lifting platform 2 to move toward the third floor 83. At this time, the normally closed control switch 52 of the first floor 81 becomes closed. If the door fence 6 of the first floor 81 is not closed normally, the feedback signal of the second photoelectric position sensor 54 of the first floor 81 reaches the alarm 55 through the normally closed control switch 52, and the alarm 55 sends an alarm signal to remind the staff of the first floor 81.

[0055] (4) When the lift 2 reaches the freight elevator entrance and exit of the third floor 83, the first photoelectric position sensor of the third floor 83 detects the first sunshade 21 of the lift 2. The feedback signal of the first photoelectric position sensor of the third floor 83 passes through the normally open control switch to the control end of the normally closed control switch, causing the normally closed control switch to be disconnected. At this time, the staff on the third floor 83 opens the gate 6 and uses the cart 22 to transport the goods out of the lift 2. Since the normally closed control switch of the third floor 83 is in the disconnected state, when the second photoelectric position sensor detects that the gate is opened, the feedback signal of the second photoelectric position sensor does not reach the alarm, and the alarm of the third floor 83 does not send out an alarm signal, thereby preventing the alarm signal from interfering with the normal logistics operations of the staff.

[0056] At this time, if the door rail of the fourth floor 84 is opened, the second photoelectric position sensor of the fourth floor 84 will feed back a signal to the alarm, and the alarm of the fourth floor 84 will send out an alarm signal. This reminds the staff of the fourth floor 84 to manually close the door rail, thereby improving safety. The same principle applies to other floors. This effectively prevents the staff from falling into the freight elevator without noticing that the door rail is open and causing injuries, and prevents the staff from accidentally touching items in the corridor and falling into the freight elevator from the open door rail, causing damage to the items.

[0057] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A cargo elevator safety device, characterized in that: include: Cargo elevator bracket, lifting platform, floor key panel, MCU, safety warning components and door rails; The lifting platform is slidably connected to the cargo elevator bracket, and the lifting platform has a first shading plate; The freight elevator bracket is provided with an entrance and exit, the door rail is hinged to the entrance and exit, and the door rail has a second sunshade; The safety warning assembly includes a normally open control switch, a normally closed control switch, a first photoelectric position sensor, a second photoelectric position sensor and an alarm; The first photoelectric position sensor is fixedly arranged at the entrance and exit, the detection end of the first photoelectric position sensor is used to detect the first shading plate, the feedback end of the first photoelectric position sensor is connected to the input end of the normally open control switch through a first wire, the output end of the normally open control switch is connected to the control end of the normally closed control switch through a second wire, the second photoelectric position sensor is fixedly arranged at the entrance and exit, the detection end of the second photoelectric position sensor is used to detect the second shading plate, the feedback end of the second photoelectric position sensor is connected to the input end of the normally closed control switch through a third wire, and the output end of the normally closed control switch is connected to the alarm through a fourth wire; The MCU is connected to the control end of the normally open control switch through a fifth wire, the number of floors key panel is connected to the MCU through a sixth wire, and the number of floors key panel is fixedly arranged on the freight elevator bracket; The plurality of entrances and exits are arranged at intervals along the height direction of the freight elevator support, and the number of the entrances and exits is consistent with the number of the safety warning components, the number of the door bars, and the number of the floor button panels.

2. A cargo elevator safety device according to claim 1, characterized in that: The normally open control switch is an NPN transistor, and the normally closed control switch is a PNP transistor.

3. A cargo elevator safety device according to claim 1, characterized in that: The normally open control switch is a normally open relay, and the normally closed control switch is a normally closed relay.

4. A cargo elevator safety device according to claim 1, characterized in that: It also includes a lock bolt, and the door fence is connected to the entrance and exit through the lock bolt.

5. A cargo elevator safety device according to claim 1, characterized in that: The detection end of the first photoelectric position sensor is divided into a light emitting end and a light receiving end, and the first light shielding plate can pass between the light emitting end and the light receiving end.

6. A cargo elevator safety device according to claim 1, characterized in that: The number of the entrances and exits is four.

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