Monitoring system for a two-level parking system and operation signal branching method for the monitoring system for a two-level parking system

Abstract

To provide a two-multistage parking device monitoring system and an operation signal branching method for the two-multistage parking device monitoring system, which can be introduced at low cost.SOLUTION: A two-multistage parking device monitoring system for raising and lowering a plurality of pallets on which a vehicle can be mounted, includes: a lifting motor which lifts the pallets; a printed circuit board which controls the lifting motor using a signal line; a branching connector which branches the signal line into branch wiring; a PLC (Programmable Logic Controller) which is connected to the branch wiring and acquires an operation signal of the signal line via the branch wiring; and a monitoring center to which the operation signal obtained by the PLC is transmitted and which monitors the two-multistage parking device based on the operation signal.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a monitoring system for a two-level parking system capable of loading a plurality of vehicles, such as automobiles, on each of the upper and lower levels, and an operation signal branching method for the monitoring system for a two-level parking system. [Background technology]

[0002] Generally, in response to the demand for space saving in parking lots in apartment buildings and high-rise buildings, multi-layered and multi-story mechanical parking systems are known. The main types of mechanical parking systems include large-scale vertical circulation and elevator-type parking systems, and relatively small two-level parking systems installed in apartment buildings, etc.

[0003] Conventionally, a multi-row, multi-level parking device with multiple rows of pallets arranged vertically and horizontally has been disclosed (see Patent Document 1). Each pallet can be raised and lowered by a lifting chain driven by a lifting drive unit, and the lifting drive unit is controlled by a computing device on an operation panel. The computing device has a CPU, RAM, and ROM mounted on a printed circuit board, for example.

[0004] In addition, a remote monitoring system has been proposed for elevator-type parking equipment, which monitors the operating status of the parking equipment, outputs the monitored information to a management center, and if the management center determines that maintenance is necessary, instructs a service engineer on the operating status of the parking equipment and the maintenance details (see Patent Document 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-159008 A [Patent Document 2] JP 2004-157828 A Summary of the Invention [Problem to be solved by the invention]

[0006] In recent years, there has been a demand for the introduction of a remote monitoring system as described in Patent Document 2 to the multi-level parking device described in Patent Document 1. However, the drive control program of an existing parking device is often not analyzable, and in such cases, it is costly to renew the control program and lifting device of the existing parking device to one that can be remotely monitored.

[0007] SUMMARY OF THE PRESENT EMBODIMENTS An object of the present invention is to provide a monitoring system for a two-level parking system that can be introduced at low cost, and an operation signal branching method for a monitoring system for a two-level parking system. [Means for solving the problem]

[0008] The present invention is characterized in that it provides a monitoring system for a two-level parking device that raises and lowers a number of pallets on which vehicles can be loaded, comprising a lifting motor that raises and lowers the pallets, a printed circuit board that controls the lifting motor using a signal line, a branch connector that branches the signal line into a branch wiring, a PLC (Programmable Logic Controller) that is connected to the branch wiring and acquires an operation signal of the signal line via the branch wiring, and a monitoring center to which the operation signal acquired by the PLC is transmitted and which monitors the two-level parking device based on the operation signal.

[0009] The present invention is also characterized in that it provides a monitoring system for a two-level parking device that raises and lowers a number of pallets on which vehicles can be loaded, comprising: a lifting motor that raises and lowers the pallets; a detection unit that outputs an operation signal based on the operation of the pallets; a printed circuit board; a signal line that transmits the operation signal from the detection unit to the printed circuit board; a branch connector that branches the signal line into a branch wiring; a PLC (Programmable Logic Controller) that is connected to the branch wiring and acquires the operation signal of the signal line via the branch wiring; and a monitoring center to which the operation signal acquired by the PLC is transmitted and which monitors the two-level parking device based on the operation signal.

[0010] The present invention also provides an operation signal branching method for a monitoring system of a two-level parking device in which a printed circuit board uses signal lines to control the raising and lowering of multiple pallets on which vehicles can be loaded, comprising: a branching step of branching the signal line into a branch wiring by a branch connector; a first connection step of connecting the branch wiring to a PLC (Programmable Logic Controller); and a second connection step of connecting the PLC to a router so that the PLC can transmit the operation signal of the signal line acquired via the branch wiring to a monitoring center.

[0011] The present invention also provides an operation signal branching method for a monitoring system of a two-level parking device, which includes a detection unit that outputs an operation signal based on the operation of a plurality of pallets on which vehicles can be loaded, and a signal line that transmits the operation signal from the detection unit to a printed circuit board, the method comprising: a branching step of branching the signal line into a branch wiring by a branch connector; a third connection step of connecting the branch wiring to a PLC (Programmable Logic Controller); and a fourth connection step of connecting the PLC to a router so that the PLC can transmit the operation signal of the signal line acquired via the branch wiring to a monitoring center. Effect of the Invention

[0012] According to the present invention, it is possible to provide a monitoring system for a two-level parking system and an operation signal branching method for a monitoring system for a two-level parking system that can be introduced at low cost. [Brief description of the drawings]

[0013] [Figure 1] 1 is an overall front view showing a two-stage multi-story parking system according to an embodiment of the present invention; [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5]FIG. 2 is a control block diagram showing the monitoring system according to the embodiment. [Figure 6] FIG. [Figure 7] FIG. 2 is a wiring diagram of the multi-story parking system according to the embodiment. [Figure 8] FIG. 4 is a wiring diagram of a multi-story parking system according to a comparative example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] [Overall configuration] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in Fig. 1 and Fig. 2, the multi-story parking device 1 is a ground-type, lift-and-transverse (puzzle) type, two-level, mechanical parking device. The multi-story parking device 1 as a two-level parking device has a four-column structure with four levels on the ground, specifically, a ground level 2 located on the ground surface G, a top level 3 at the top position, and intermediate levels 4, 5 located between the ground level 2 and the top level 3.

[0015] The multi-story parking device 1 can park four vehicles V side by side on the top level 3, and three vehicles V side by side on each of the ground level 2 and the intermediate levels 4 and 5, making it possible to park a total of 13 vehicles V. A gate GT that can be opened and closed is provided on the ground level 2, and the gate GT opens when a vehicle V enters or leaves the parking facility.

[0016] The multi-story parking device 1 includes a frame body 6 erected on ground surface G, a number of pallets 7 supported by the frame body 6 and capable of carrying vehicles V, a slide mechanism (not shown) that slides the pallets 7 in the left-right direction (the direction in which the vehicles V are lined up side by side) relative to the frame body 6, and a lifting device 9 (see FIG. 3) (described later) that raises and lowers the pallets 7 in the up-down direction (height direction) relative to the frame body 6. Note that the direction in which the vehicles V enter and exit the parking lot is defined as the front-rear direction, and the entrance side of the pallets 7 is defined as the front side, and the opposite side is defined as the rear side.

[0017] In the multi-story parking system 1 of this embodiment, the three pallets 7 located on the ground level 2 do not have a lifting device and only slide by a slide mechanism. The four pallets 7 located on the top level 3 do not have a slide mechanism and only move up and down by a lifting device. The six pallets located on the middle levels 4 and 5 move up and down and slide by a lifting device and a slide mechanism. The surrounding configuration will be explained below using the pallet located on the leftmost level of the middle level 5 as an example.

[0018] The pallet 7 is formed in a generally rectangular shape in a plan view, and has upwardly protruding protrusions 7a, 7a formed along both left and right end edges, with the vehicle V accommodated on a floor portion 7b between these protrusions 7a, 7a. The slide mechanism (not shown) is configured such that, for example, the pallet 7 is supported by rollers on the horizontal frame body 6a extending in the left and right direction, and the rollers are rotated by motor drive to slide on the horizontal frame body 6a.

[0019] [Lifting device] 3, the lifting device 9 is disposed above the pallet 7 and has a fixed frame 10 having approximately the same front-to-back and left-to-right dimensions as the pallet 7, and a rotating shaft 12 extending in the left-to-right direction and rotated by the power of a lifting drive motor 11 is rotatably supported at the rear of the fixed frame 10. Two pairs of drive sprockets 13a, 13b and 15a, 15b are fixed to the left and right ends of the rotating shaft 12, and two pairs of roller chains 16a, 16b and 17a, 17b are wound around the two pairs of drive sprockets 13a, 13b and 15a, 15b, respectively.

[0020] The roller chains 16a, 16b, 17a, 17b are formed by alternately connecting pin links, each of which has two link plates connected at both ends by a pin, and roller links, each of which has two link plates connected at both ends by a bush and has a roller loosely fitted into the bush, by inserting pins into the bushes, and are freely bendable by the numerous pin links and roller links, and one end 19a, 19b, 20a, 20b of each chain hangs down via guide sprockets 21a, 21b, 22a, 22b and is connected to the front and rear sides (four corners) of both the left and right ends of the pallet 7. In other words, the roller chains 16a, 16b, 17a, 17b, each of which has one end 19a, 19b, 20a, 20b connected to the four corners of the pallet 7, are wound up or down by the same amount by the power of the lifting drive motor 11, and the pallet 7 can be lifted and lowered while maintaining a horizontal state.

[0021] Below the two pairs of drive sprockets 13a, 13b, 15a, 15b, there are disposed chain boxes 23, 25 for storing roller chains 16a, 16b, 17a, 17b that become surplus when the pallet 7 is elevated. Since the lifting device 9 is provided for each pallet 7, the roller chains 16a, 16b, 17a, 17b are also provided for each pallet 7.

[0022] [Control panel] As shown in FIG. 1, FIG. 2, and FIG. 4, a control panel 45 is disposed on the rear side of the multi-story parking device 1. As shown in FIG. 4, the control panel 45 has a printed circuit board 46, a router 47, a terminal block 48, an antenna 49, and a PLC (Programmable Logic Controller) 80. A plurality of wirings 98 of various motors and various sensors are connected to the printed circuit board 46 via the terminal block 48. A branch wiring 99 branched by a branch connector described later from the wiring 98 connected to the printed circuit board 46 is connected to the PLC 80. The router 47 is connected to the PLC 80, and the antenna 49 is connected to the router 47. For example, an M2M router is used as the router 47. The antenna 49 may be configured integrally with the router 47 or may be configured separately.

[0023] [Control block diagram] 5 is a control block diagram of a monitoring system 100 for a multi-story parking device 1 according to the present embodiment. The monitoring system 100 includes a multi-story parking device 1 including a printed circuit board 46 and a PLC 80, and a monitoring center 62. The printed circuit board 46 includes a CPU 51, a ROM 52, a RAM 53, an I / O interface 54, a counter 55, and a timer 56, and the CPU 51 executes various programs stored in the ROM 52. The RAM 53 can temporarily store data, and is used as a working area for the CPU 51. The CPU 51 exchanges data and signals with external components and the like via the I / O interface 54.

[0024] An inclination sensor 57, a temperature and humidity sensor 58, a water level sensor 59, a lift limit switch 73, a traverse limit switch 74, and a fall prevention device 75 are connected to the input side of the printed circuit board 46. The inclination sensor 57 can detect the inclination of the pallet 7 with respect to the horizontal plane. For example, if the inclination sensor 57 detects that the pallet 7 is greatly inclined due to a strong wind or the like while the pallet 7 is being lifted or lowered, the CPU 51 brings the pallet 7 to an emergency stop. The temperature and humidity sensor 58 detects the temperature and humidity of the surrounding environment of the multi-story parking device 1. The water level sensor 59 is provided as an option and can detect the water level according to the mounting position on the multi-story parking device 1. For example, if the water level sensor 59 detects that the water level of the multi-story parking device 1 has reached a dangerous level due to a typhoon, high tide, or the like, the CPU 51 stops the operation of the pallet 7.

[0025] The lifting / lowering limit switches 73 are switches for stopping the pallet 7 at positions corresponding to each vehicle compartment of the multi-story parking apparatus 1 when the pallet 7 is raised or lowered by the lifting device 9. For this reason, a plurality of lifting / lowering limit switches 73 are provided at predetermined positions of the multi-story parking apparatus 1. For example, when the pallet 7 is raised or lowered from a first vehicle compartment to a second vehicle compartment, the pallet 7 is stopped based on the lifting / lowering limit switch 73 corresponding to the second vehicle compartment turning from OFF to ON. The lifting / lowering limit switches 73 also include an upper limit switch and a lower limit switch that define the upper limit position or the lower limit position of the pallet 7.

[0026] The lateral travel limit switch 74 is a switch for stopping the pallet 7 at a position corresponding to each compartment of the multi-story parking device 1 when the pallet 7 slides left and right by the slide mechanism. For this reason, a plurality of lateral travel limit switches 74 are provided at predetermined positions of the multi-story parking device 1. For example, when the pallet 7 is slid from the third compartment to the fourth compartment, the pallet 7 is stopped based on the transition of the lateral travel limit switch 74 corresponding to the fourth compartment from OFF to ON.

[0027] The fall prevention device 75 is a device for receiving the pallet 7 and preventing the pallet 7 from falling when, for example, the roller chains 16a, 16b, 17a, 17b break. The fall prevention devices 75 are provided in a set of four at the four corners of the pallet 7, and a plurality of sets are provided at predetermined positions of the multi-story parking device 1. Each fall prevention device 75 has a stopper that can be moved to a receiving position for receiving the pallet 7 and a retreat position retreated from the ascending and descending trajectory of the pallet 7, an actuator such as a solenoid that moves the stopper between the receiving position and the retreat position, and a limit switch that is turned ON when pressed by the pallet 7. The actuator is driven based on the limit switch being turned ON from OFF.

[0028] The lift limit switch 73, the traverse limit switch 74, and the limit switch of the fall prevention device 75 each constitute a detection unit that outputs an operation signal based on the movement of the pallet 7.

[0029] An elevation drive motor 11 as an elevation motor for raising and lowering the pallet 7, a horizontal drive motor 60 for sliding the pallet 7, a gate drive motor 76, and the like are connected to the output side of the printed circuit board 46. The gate drive motor 76 opens and closes the gate GT. Furthermore, the wiring connected to the printed circuit board 46 is branched by branch connectors, and these branch wirings are connected to a PLC 80. Note that the terminal block 48 is omitted in FIG. 5.

[0030] Specifically, wiring 57a connecting the tilt sensor 57 and the printed circuit board 46 is branched into branch wiring 57b by a branch connector 81, and the branch wiring 57b is connected to the PLC 80. Similarly, wiring connecting the temperature and humidity sensor 58, the water level sensor 59, the lift drive motor 11, the horizontal drive motor 60, the lift limit switch 73, the traverse limit switch 74, the fall prevention device 75, and the gate drive motor 76 to the printed circuit board 46 is branched by branch connectors 82-85, 87-90, and connected to the PLC 80. In this embodiment, electrotaps are used for the branch connectors 81-85, 87-90.

[0031] The PLC 80 is connected to a monitoring device 63 in a monitoring center 62 located in a remote location by using, for example, a closed mobile network 86 via a router 47. It should be noted that other networks such as public telephone lines or the Internet may be used instead of the closed mobile network 86. The monitoring device 63 is composed of a personal computer, a workstation, or the like, and has a storage device 64 such as a hard disk.

[0032] The storage device 64 stores the operation data 65 transmitted from the PLC 80. The operation data 65 includes the number of operations of each pallet 7, the last operation time, and the detection results of various sensors, which the PLC 80 acquires from each branch wiring. The operation data 65 also includes durability data, replacement history data, and inspection history data of each part, the number of abnormality occurrences, and the history of abnormality occurrence causes. A monitor 66 such as a PC or a smartphone can be connected to the storage device 64 via a wired or wireless line, and the operation data 65 and a monitoring screen based on the operation data 65 can be viewed by the monitor 66. In addition, for example, a report on which pallet has been operated the most can be created using the operation data 65, and reported to the user of the multi-story parking device 1.

[0033] 6 is an example of a monitoring screen 70 displayed on the monitor 66. A pallet status 71 is displayed for each pallet on the monitoring screen 70. For example, the pallet status 71 for pallet No. 1 displays an operation status display area 72, which displays the time when the service technician last performed maintenance on this pallet and the time when pallet No. 1 was last operated.

[0034] [Wiring diagram] Fig. 7 is an example of a wiring diagram of the multi-story parking device 1. First, a power line (electric wire) L1 of, for example, AC 200V three-phase three-wire type is connected to the earth leakage breaker 91. Then, the three-wire power line L2 extending from the earth leakage breaker 91 is connected to various motors such as the lift drive motor 11 and the horizontal drive motor 60 (see Fig. 5) via electromagnetic contactors 92a and 92b as switches capable of cutting or connecting the current. Note that electromagnetic switches may be used instead of the electromagnetic contactors 92a and 92b.

[0035] Furthermore, of the three-wire power line L1 input to the earth leakage breaker 91, two electric wires L3 are connected to a power supply 93. The power supply 93 converts AC 200V to DC 24V and supplies it to the printed circuit board 46. The printed circuit board 46 and the electromagnetic contactor 92a are connected by a signal line L41, which supplies a DC current to the coil of the electromagnetic contactor 92a and can open or close the main contacts of the electromagnetic contactor 92a. The printed circuit board 46 and the electromagnetic contactor 92b are connected by a signal line L42, which supplies a DC current to the coil of the electromagnetic contactor 92b and can open or close the main contacts of the electromagnetic contactor 92b.

[0036] A signal line group L5 including various switch signal lines and sensor signal lines is connected to the printed circuit board 46 via a terminal block 48. The signal line group L5 includes signal lines connected to, for example, the tilt sensor 57, the temperature and humidity sensor 58, the water level sensor 59, the lift limit switch 73, the lateral travel limit switch 74, and the fall prevention device 75. For example, the signal line group L5 includes signal lines L47, L48, and L49 connected to the lift limit switch 73, the lateral travel limit switch 74, and the fall prevention device 75. When, for example, the tilt sensor 57 or the water level sensor 59 outputs a signal indicating an abnormal value, the printed circuit board 46 performs power control via the signal lines L41 and L42 so that the contacts of the electromagnetic contactors 92a and 92b are disconnected, and for example, the lift drive motor 11 and the horizontal drive motor 60 are stopped. The signal line group L5 may include signal lines of a key switch or emergency stop switch of the control panel 45, and other switches capable of acquiring the number of operations of the pallet 7.

[0037] Here, Fig. 8 shows a wiring diagram of a multi-story parking apparatus according to a comparative example that does not have a monitoring system. The multi-story parking apparatus shown in Fig. 8 has the same pallet control as the multi-story parking apparatus 1 according to the present embodiment in that the lift drive motor 11 and horizontal drive motor 60 are driven by a printed circuit board 46. Recently, there has been a demand to retrofit a monitoring system to a multi-story parking apparatus having the wiring diagram shown in Fig. 8.

[0038] However, the control program for the multi-story parking device using the printed circuit board 46 is difficult to analyze, and when adding a monitoring system later, it is usually necessary to replace the entire printed circuit board 46 with another one. The control program for the multi-story parking device requires the preparation of a power supply capacity, various motors, switches, wiring, etc. according to the program, and as a result, replacing the entire printed circuit board 46 with the monitoring system is extremely costly.

[0039] Therefore, in this embodiment, a monitoring system for a two-level parking system is provided that can be retrofitted with a monitoring system at low cost while making use of the control system of an existing multi-story parking system, as well as an operation signal branching method for the monitoring system for a two-level parking system.

[0040] Specifically, the wiring diagram shown in FIG. 7 has branched wiring (signal lines) by branch connectors 81-85 and 87-90, compared to the wiring diagram shown in FIG. 8. In FIG. 7, the branched wiring is indicated by a broken line. For example, as shown in FIG. 5 and FIG. 7, the branch connectors 81-85 and 87-90 branch the signal lines transmitting the operation signals (electrical signals) of the tilt sensor 57, the temperature and humidity sensor 58, the water level sensor 59, the lifting drive motor 11, the horizontal drive motor 60, the lifting limit switch 73, the traverse limit switch 74, the fall prevention device 75, and the gate drive motor 76 into branched wiring, and each branched wiring is connected to the PLC 80. The PLC 80 is connected to the router 47 by a LAN cable. Then, the PLC 80 transmits the operation signals of each signal line acquired by the PLC 80 through the branched wiring to the monitoring center 62 (see FIG. 5) via the router 47 (and the antenna 49 (see FIG. 4)).

[0041] In other words, the operation signal branching method for a monitoring system of a two-level parking device includes a branching step of branching the signal line L41, which transmits the operation signal of the lifting drive motor 11, into a branch wiring L84 by a branch connector 84, a first connection step of connecting the branch wiring L84 to the PLC 80, and a second connection step of connecting the PLC 80 to the router 47 so that the PLC 80 can transmit the operation signal of the signal line L41 acquired via the branch wiring L84 to the monitoring center 62.

[0042] In addition, the operation signal branching method for the monitoring system of the two-level parking device includes a branching step of branching the signal lines L47, L48, and L49 transmitting the operation signals output from the lift limit switch 73, the traverse limit switch 74, and the limit switch of the fall prevention device 75 into branch wirings L87, L88, and L89 by the branch connectors 87 to 89, a third connection step of connecting the branch wirings L87, L88, and L89 to the PLC 80, and a fourth connection step of connecting the PLC 80 to the router 47 so that the PLC 80 can transmit the operation signals of the signal lines L47, L48, and L49 acquired through the branch wirings L87, L88, and L89 to the monitoring center 62. Note that in the branching step, the third connection step, and the fourth connection step, it is only necessary to branch at least one of the signal lines L47, L48, and L49 into the branch wiring and transmit the operation signal to the monitoring center 62 through the branch wiring.

[0043] This allows the monitoring center 62 to remotely monitor operation information of the pallet 7 obtained from at least one of the lift drive motor 11, the horizontal drive motor 60, the lift limit switch 73, the traverse limit switch 74, and the limit switch of the fall prevention device 75, and allows efficient maintenance management of the multi-story parking device 1. For example, a serviceman can be sent to the multi-story parking device 1 at an appropriate time according to the operating rate of each pallet 7 to oil the roller chains 16a, 16b, 17a, 17b and perform other maintenance. This allows effective and preventive maintenance of the multi-story parking device 1, and reduces maintenance costs and labor.

[0044] In this embodiment, the signal lines of, for example, the tilt sensor 57 and the water level sensor 59 are also branched by the branch connectors 81, 83, so that if the pallet 7 is significantly tilted or the tolerable water level of the multi-story parking device 1 is exceeded, the monitoring center 62 can grasp this and issue an emergency instruction to dispatch a service technician to the multi-story parking device 1. Also, for example, when a user makes an inquiry about maintenance, the monitoring screen 70 can be transferred to the service technician, allowing the service technician to accurately grasp the status of the multi-story parking device 1 in real time.

[0045] In addition, in this embodiment, by branching signal lines of various motors and sensors / switches from the existing multi-level parking system 1 that controls the raising and lowering of the pallet 7 by the printed circuit board 46, a monitoring screen 70 can be created in the monitoring center 62. Therefore, the monitoring system can be retrofitted by utilizing existing equipment such as wiring, and a monitoring system for a two-level parking system can be introduced at low cost.

[0046] In addition, in a mechanical parking device with multiple rows, such as the multi-story parking device 1 of this embodiment, a printed circuit board that controls the lifting and lowering of the pallet 7 may be provided for each row. In this case, if the signal lines of the printed circuit board provided for each row are branched, the wiring becomes complicated. In such a case, the wiring may be simplified by using a signal aggregation device such as CC-LINK (registered trademark). For example, the wiring for each row may be connected to a CC-LINK (registered trademark) unit, and the signals of these CC-LINK (registered trademark) units may be aggregated into an Ethernet (registered trademark) cable and connected to the PLC 80.

[0047] In the present embodiment, electrotaps are used for the branch connectors 81 to 85, 87 to 90, but the method of branching the wiring is not limited to this. For example, crimp connection terminals, splice terminals, double bullet terminals, Y-type connection terminals, branch terminals, or soldering may be used for the branch connectors 81 to 85, 87 to 90. [Explanation of symbols]

[0048] 1. Multi-storey car parking system 7 Palette 11 Lift motor (lift drive motor) 46 Printed Circuit Board 47 Router 62 Surveillance Center 73, 74, 75 Detection unit (lift limit switch, traverse limit switch, fall prevention device) 80 PLC 84,87,88,89,90 Branch connector 92a Switch (electromagnetic contactor) 100 Surveillance System L41,L47,L48,L49 Signal line L84, L87, L88, L89 Branch wiring V Vehicle

Claims

1. A monitoring system for a two-level multi-level parking device that raises and lowers multiple pallets on which vehicles can be loaded, comprising: A lifting motor for lifting and lowering the pallet; A printed circuit board that controls the lift motor using a signal line; a branch connector for branching the signal line into a branch wiring; a programmable logic controller (PLC) connected to the branch wiring and configured to receive an operation signal of the signal line via the branch wiring; The operation signal acquired by the PLC is transmitted to a monitoring center that monitors the two-level multi-level parking device based on the operation signal. A monitoring system for a two-level parking system.

2. A switch capable of disconnecting or connecting a current to the lift motor is further provided, The signal line connects the printed circuit board and the switch.

2. The monitoring system for a two-level parking system according to claim 1.

3. A monitoring system for a two-level multi-level parking device that raises and lowers multiple pallets on which vehicles can be loaded, comprising: A lifting motor for lifting and lowering the pallet; A detection unit that outputs an operation signal based on the operation of the pallet; A printed circuit board; a signal line that transmits the operation signal from the detection unit to the printed circuit board; a branch connector for branching the signal line into a branch wiring; a programmable logic controller (PLC) connected to the branch wiring and configured to acquire the operation signal of the signal line via the branch wiring; The operation signal acquired by the PLC is transmitted to a monitoring center that monitors the two-level multi-level parking device based on the operation signal. A monitoring system for a two-level parking system.

4. The detection unit has a limit switch that outputs the operation signal based on the operation of the pallet.

4. The monitoring system for a two-level parking system according to claim 3.

5. The operation signal acquired by the PLC is transmitted to the monitoring center via a router.

5. The monitoring system for a two-level parking system according to claim 1.

6. The branch connector is an electrotap.

6. A monitoring system for a two-level parking system according to claim 1.

7. A method for branching an operation signal for a monitoring system of a two-level parking device in which a printed circuit board controls the raising and lowering of a plurality of pallets on which vehicles can be loaded using signal lines, comprising: a branching step of branching the signal line into a branch wiring by a branch connector; a first connection step of connecting the branch wiring to a PLC (Programmable Logic Controller); a second connection step of connecting the PLC to a router so that the PLC can transmit an operation signal of the signal line acquired through the branch wiring to a monitoring center.

2. A method for splitting an operating signal for a monitoring system for a two-level parking system, comprising:

8. An operation signal branching method for a monitoring system of a two-level multi-level parking device, comprising: a detection unit that outputs an operation signal based on the operation of a plurality of pallets on which vehicles can be loaded; and a signal line that transmits the operation signal from the detection unit to a printed circuit board, a branching step of branching the signal line into a branch wiring by a branch connector; a third connection step of connecting the branch wiring to a PLC (Programmable Logic Controller); and a fourth connection step of connecting the PLC to a router so that the PLC can transmit the operation signal of the signal line acquired through the branch wiring to a monitoring center.

2. A method for splitting an operating signal for a monitoring system for a two-level parking system, comprising:

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