Monitoring device

Abstract

This provides superior monitoring equipment, such as a system that provides excellent power supply to the camera unit. [Solution] The monitoring device 1 includes a guide rail 2 that extends vertically, a monitoring camera unit 5 that moves up and down along the guide rail 2 and is equipped with a wireless communication device, a winch unit 3 that moves the camera unit 5 up and down by winding and unwinding a wire 4 attached to the camera unit 5, and a charging unit 6 provided on the guide rail 2 that charges the camera unit 5 when the camera unit 5 reaches a predetermined height along the guide rail 2.

Description

Technical Field

[0001] The present invention relates to a monitoring device including a camera unit and the like.

Background Art

[0002] At construction sites in urban areas, etc., there is often not enough space to set up a construction office within the site, and the construction office may be set up at a location away from the construction site. In this case, the construction staff needs to travel back and forth between the construction office and the construction site several times a day to grasp the on-site situation. Also, in urban areas, etc., buildings tend to be taller, and vertical movement within the construction site increases. During the construction period, the use of the personnel and cargo elevator is also limited, so it is often necessary to move up and down the stairs, which is a great burden both in terms of time and labor.

[0003] Under such circumstances, there is a movement to promote remote monitoring of construction sites using surveillance cameras in order to reduce the number of personnel and reform work styles. This makes it possible to grasp the progress of the construction in real time and is also effective in terms of safety management. For example, Patent Document 1 discloses using a camera unit that moves up and down along a vertical passage by winding and unwinding a wire rope with a winch to monitor a construction site.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] A power source is necessary to operate a surveillance camera. However, if the surveillance camera is battery-powered, the battery needs to be replaced every time the power runs low. In Patent Document 1, power is supplied to the camera unit via a power cord, but the power cord must be routed in a way that does not interfere with the wire rope used to raise and lower the camera unit, which requires complex consideration. In addition, measures are needed to prevent people from getting caught on the power cord and to prevent workers from tripping over the power cord.

[0006] This invention has been made in view of the above-mentioned problems, and aims to provide a superior monitoring device, etc., in terms of power supply to the camera unit. [Means for solving the problem]

[0007] The present invention, which solves the above problems, is a monitoring device characterized by comprising: a guide rail extending vertically; a monitoring camera unit that moves up and down along the guide rail and is equipped with a wireless communication device; a winch unit that moves the camera unit up and down by winding and unwinding a wire attached to the camera unit; and a charging unit provided on the guide rail that charges the camera unit when the camera unit reaches a predetermined height along the guide rail.

[0008] The monitoring device of the present invention achieves the aforementioned labor savings and work style reforms by remotely monitoring construction sites and other locations. By raising and lowering the camera unit by winding and unwinding a wire, a single camera can monitor at different heights. Therefore, there is no need to install cameras on each floor of a building, reducing installation effort, and there is no need to move or remove cameras according to the progress of construction on each floor. Moreover, the camera unit is charged by a charging unit at a predetermined height along a guide rail, so the effort of replacing the camera unit's battery is greatly reduced. Furthermore, the camera unit does not require power cords or other cables, so there is no interference between cables and wires, and no need for measures to prevent cables from getting caught or tripped over. In addition, the video captured by the camera unit can be transmitted to a remote construction office, etc. via a wireless communication device, so there is no need to lay LAN cables.

[0009] The charging unit is suspended and supported from above by a suspension member and is installed above the camera unit without fixing its height. This reduces the impact when the camera unit and charging unit come into contact, preventing damage to the charging unit.

[0010] The charging unit is provided above the camera unit, and a recess is provided at the end of the flat surface of the charging unit on the guide rail side, through which the wire passes. This allows a wire to be passed through a recess in the charging unit, and the camera unit below the charging unit to be raised and lowered by this wire. Furthermore, it becomes possible to set the camera unit with the wire attached onto the guide rail before installing the charging unit.

[0011] Preferably, the winch unit is provided above the guide rail, and a wire position adjustment mechanism is provided between the winch unit and the guide rail to adjust the planar position of the wire extending from the winch unit to match the planar position of the guide rail. The wire position adjustment mechanism includes, for example, a gripping part for gripping a single pipe of temporary scaffolding or a single pipe supported on a structure, a first rail extending outward from the gripping part, a second rail arranged in a direction perpendicular to the first rail in a plan view and movable along the first rail, and a plurality of pulleys for hanging the wire, movable along the second rail. The wire position adjustment mechanism described above allows the position of the wire unwound from the winch unit to be adjusted to match the guide rail (camera unit), improving the flexibility of the winch unit's installation position. Furthermore, by constructing the wire position adjustment mechanism using the gripping part, rail, and pulley described above, the wire position adjustment mechanism becomes simpler, and the wire position can be easily adjusted.

[0012] The aforementioned guide rail is constructed by attaching multiple rail members, one above the other, to a single pipe of the temporary scaffolding or a single pipe supported by the building structure. This allows for the easy installation of guide rails at any desired height using temporary scaffolding or the building structure.

[0013] The camera unit comprises a shooting device that can rotate to change the shooting direction in a plane within a predetermined angular range, and an arm member that rotates in a plane around one end and has the shooting device mounted on the other end. When changing the shooting direction of the shooting device in a plane beyond the predetermined angular range, it is desirable to rotate the arm member after detecting by a sensor that the shooting direction of the shooting device in a plane is at the end of the predetermined angular range. In this way, by using sensors to combine the rotation of the imaging device with the rotation of the arm member, the imaging device can capture images over a wide area, enabling wide-area surveillance.

[0014] It is desirable for the winch unit to be equipped with a wireless communication device for remote operation. Thereby, the camera unit can be remotely operated to move up and down. Such a camera unit contributes to work style reform and the like, and also contributes to the continuation of business at the site because even when disasters such as earthquakes and typhoons occur at night or during business hours, the damage situation of the building can be known without personnel, and the damage situation of the building can be grasped.

[0015] It is desirable for the camera unit to give an alarm by at least either hearing or vision when moving up and down. By giving an alarm when the camera unit moves up and down, it is possible to prompt the operator to give a warning and prevent contact with the camera unit, and it is also expected to improve the safety awareness of the operator.

Effect of the Invention

[0016] According to the present invention, it is possible to provide a monitoring device or the like excellent in terms of power supply to the camera unit.

Brief Description of the Drawings

[0017] [Figure 1] A diagram showing the monitoring device 1. [Figure 2] A diagram showing the rail member 20. [Figure 3] A diagram showing the winch unit 3. [Figure 4] A diagram showing the anti-tangle mechanism 312. [Figure 5] A diagram showing the camera unit 5 and the charging unit 6. [Figure 6] A diagram showing the positional relationship between the photographing device 51 and the arm member 53 in a plane. [Figure 7] A diagram showing the lower surface of the charging unit 6. [Figure 8] A diagram showing a state where the camera unit 5 and the charging unit 6 are in contact. [Figure 9] A diagram showing the wire position adjustment mechanism 7.

Mode for Carrying Out the Invention

[0018] Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

[0019] Figure 1 shows a monitoring device 1 according to an embodiment of the present invention. As shown in Figure 1, the monitoring device 1 is installed on a temporary scaffolding 200 arranged along the building frame 100, and includes a guide rail 2, a winch unit 3, a camera unit 5, a charging unit 6, a wire position adjustment mechanism 7, etc. The monitoring device 1 is used to monitor a construction site, and one or more units can be installed depending on the planar shape and size of the construction site.

[0020] Guide rail 2 is a rail arranged in the vertical direction. Guide rail 2 is constructed by connecting multiple rail members of a predetermined length in vertical rows, and can be set to any height. Figure 2(a) shows rail member 20. Rail member 20 has a substantially square cross-section, with a hole 21 in the center and grooves 22 on each of the four sides of the cross-section. The hole 21 and grooves 22 are provided along the longitudinal direction of rail member 20.

[0021] When connecting the rail members 20, a metal core rod 23 having an outer diameter corresponding to the hole 21 is inserted into the hole 21 of the lower rail member 20 as shown by arrow a. At the middle of the longitudinal direction of the core rod 23, a ring-shaped projection 231 is provided on the outer circumference of the core rod 23 by a rubber band or the like, and as shown in Figure 2(b), the projection 231 is locked to the upper surface of the lower rail member 20.

[0022] Subsequently, as shown by arrow b in Figure 2(c), the upper rail member 20 is lowered, the upper part of the core rod 23 is inserted into the hole 21 of the rail member 20, and the upper rail member 20 is positioned on top of the lower rail member 20. This positions the upper and lower rail members 20 in a plane. The upper and lower rail members 20 can be fixed together by fastening fixing brackets (not shown) to the upper and lower rail members 20 with bolts or the like.

[0023] As shown in Figure 1, each rail member 20 is attached to the vertical single pipes 201 of the temporary scaffolding 200 by mounting fixtures 26 and positioned in the gap between the building structure 100 and the temporary scaffolding 200. However, this is not the only option, and the rail members 20 can also be attached to single pipes supported by the building structure 100, such as beams or auxiliary steel frames. Note that the single pipes 201 of the temporary scaffolding 200 include not only the single pipes that make up the temporary scaffolding 200, but also other single pipes attached to the temporary scaffolding 200.

[0024] The winch unit 3 is installed on the temporary scaffolding 200 above the guide rail 2. The winch unit 3 winds up and unwinds the wire 4 in order to raise and lower the camera unit 5 along the guide rail 2.

[0025] Figure 3 shows a winch unit 3. The winch unit 3 includes a winch 31, a wireless communication device 32, an operation panel 33, etc. Power is supplied to the winch unit 3 from the distribution panel on the nearest floor via a power cable 34. Two cables 35 extend from the winch unit 3 to the charging unit 6, one for power supply and the other for communication.

[0026] The winch 31 raises and lowers the camera unit 5 by winding and unwinding the wire 4. The winch 31 is equipped with a drum 311 around which the wire 4 is wound, and also with a mechanism 312 to prevent the wire 4 from becoming tangled around the drum 311.

[0027] Figure 4 shows the wire winding prevention mechanism 312. In this embodiment, a movement mechanism using a ball screw 3122 is used to prevent the wire 4 from being wound unevenly. Specifically, a positioning part 3121 that determines the planar position of the wire 4 wound on the drum 311 is provided on the ball screw 3122. During the winding of the wire 4, the motor 3123 rotates the ball screw 3122 around its axis, moving the positioning part 3121 in the axial direction of the ball screw 3122 (corresponding to the left-right direction in Figure 4). This ensures that the wire 4 is wound evenly on the drum 311.

[0028] Although not specifically shown in the diagram, the winch 31 is also equipped with rollers for applying tension to the wire 4 unwound from the drum 311, and an encoder for measuring the unwinding length of the wire 4 and controlling the winding and unwinding of the wire 4 by the winch control unit (not shown). Furthermore, the winding and unwinding of the wire 4 is controlled such that if an overload is detected on the wire 4, no further winding of the wire 4 is performed, and if no load is detected on the wire 4, no further unwinding of the wire 4 is performed.

[0029] The wireless communication device 32 is for remotely controlling the winding and unwinding of the wire 4 by the winch 31. In other words, the winch unit 3 is connected to a computer in the construction office or the like via the wireless communication device 32, and the winding and unwinding of the wire 4 by the winch 31 can be performed in response to instructions from the computer in the construction office or the like to the winch control unit. This makes it possible to raise and lower the camera unit 5 by remote control.

[0030] The control panel 33 is equipped with dials and switches for manual operation, and a keyhole for inserting a key to switch between manual and remote operation. Manual operation can be performed by inserting the key into the keyhole and rotating it to a predetermined angle. When using remote operation, the key is removed from the keyhole, preventing manual operation.

[0031] Figure 5 shows the camera unit 5 and the charging unit 6. The camera unit 5 is for monitoring construction sites and moves up and down along the guide rail 2 by winding and unwinding a wire 4 using the winch unit 3. The charging unit 6 charges the battery 54 of the camera unit 5. The charging unit 6 is installed above the camera unit 5 at the upper end of the guide rail 2.

[0032] As shown in Figure 5, the camera unit 5 includes a shooting device 51, a base 52, an arm member 53, a battery 54, a wireless communication device 55, rollers 56 and 57, a hook 58, an alarm device 59, and the like.

[0033] The camera 51 is a camera that captures video footage of the construction site and is rotatable within a predetermined angular range in a plane. In addition, the camera 51 can also be rotated (tilted) in a vertical plane.

[0034] The base 52 is a support part that supports the imaging device 51, arm member 53, battery 54, wireless communication device 55, alarm device 59, etc., and moves up and down along the guide rail 2. Reference numeral 521 in Figure 5 indicates a heat dissipation mechanism provided on the base 52, which has a fan and a dust filter on its lower surface.

[0035] One end of the arm member 53 is attached to the base 52. A camera 51 is provided at the other end of the arm member 53. The arm member 53 is rotatable in a plane about the aforementioned one end.

[0036] The battery 54 is located on top of the camera unit 5 and supplies power to the shooting device 51, wireless communication device 55, alarm device 59, etc. The battery 54 is charged by the charging unit 6. In this way, the camera unit 5 is battery-powered, so no power cable is required.

[0037] The wireless communication device 55 is connected to a computer in the construction office or the like, and transmits the video captured by the camera 51 to the computer. This eliminates the need to lay LAN cables or the like when remotely monitoring the construction site. In this embodiment, the winch unit 3 can also be remotely operated from a computer in the construction office or the like while viewing the video captured by the camera 51 on a monitor in the construction office or the like. It is also possible to send instructions from the computer in the construction office or the like to the control unit (not shown) of the camera unit 5, and remotely operate the camera unit 5 to adjust the shooting range of the camera 51.

[0038] The roller 56 is used to move the base 52 along the guide rail 2. The roller 56 is positioned in grooves 22 on three sides of the rail member 20, excluding the side opposite the camera unit 5, and moves within these grooves 22. This allows the camera unit 5 to be raised and lowered vertically while maintaining the planar position of the base 52 (camera unit 5).

[0039] The roller 57 is in contact with the surface of the guide rail 2 and rotates in accordance with the raising and lowering of the camera unit 5. The rotation of the roller 57 is detected by a sensor (not shown), such as a magnetic sensor, and when the control unit (not shown) of the camera unit 5 detects the rotation of the roller 57 during the raising and lowering of the camera unit 5, an alarm is issued from the alarm device 59.

[0040] The hook 58 is a hanging bracket to which the lower end of the wire 4 is attached, and is provided on the top of the camera unit 5.

[0041] The alarm device 59 emits a visual, auditory, or both alarm when the camera unit 5 is raised or lowered, informing workers at the construction site of the presence of the camera unit 5 and its movement. The alarm device 59 is equipped with a speaker for emitting auditory alarms such as predetermined melodies, and a flashlight or display for emitting visual alarms. In addition to emitting alarms when the camera unit 5 is raised or lowered, the alarm device 59 can also emit alarms in response to instructions from a computer at the construction office or elsewhere when an abnormality is detected through remote monitoring. Furthermore, it is possible to perform image processing on the video captured by the camera unit 5 using a computer at the construction office or elsewhere, and automatically emit alarms or other signals based on the results.

[0042] In this embodiment, wide-area video capture is achieved by rotating (panning) the camera 51 in the plane and rotating the arm member 53 in the plane. Figure 6(a) shows the positional relationship between the camera 51 and the arm member 53 in the plane, and arrow c indicates the direction of the center of the shooting range by the camera 51 (referred to as the shooting direction). By rotating the camera 51 around the pivot axis 513 from this state, the shooting direction c of the camera 51 can be changed within a predetermined angular range.

[0043] In this embodiment, when the shooting direction c of the shooting device 51 reaches the end of the aforementioned angular range, a metal marker 511, such as stainless steel, provided on the shooting device 51 is detected by the sensor 512, as shown in Figure 6(b). Then, the control unit (not shown) of the camera unit 5 rotates the arm member 53 around the pivot axis 531 at the end on the base 52 side in the same direction d as the rotation direction d of the shooting device 51 (see Figure 6(b)), as shown in Figure 6(c). A pair of sensors 512 are provided on either side of the arm member 53, and the rotation direction d of the shooting device 51 can be determined by which sensor 512 detected the marker 511.

[0044] This allows the shooting direction c of the shooting device 51 to be changed beyond the aforementioned angular range, enabling wide-area monitoring. It also allows the shooting range behind the camera unit 5 (towards the guide rail 2 from the perspective of the camera unit 5) to be captured while avoiding the base 52 and guide rail 2 behind the shooting device 51.

[0045] Figure 7 shows the underside of the charging unit 6. As shown in Figure 7, the charging unit 6 consists of a roughly plate-shaped body equipped with a wireless charger 61, recesses 62, rollers 63, pins 64, etc. The charging unit 6 is suspended from above at two points by suspension members 25 such as wires, and is positioned without fixing its height. The upper end of the suspension member 25 is attached to the suspension part 24 at the upper end of the guide rail 2.

[0046] The wireless charger 61 charges the battery 54 of the camera unit 5.

[0047] The recess 62 is provided at the end of the main body surface of the charging unit 6 on the guide rail 2 side, and the wire 4 is passed through the recess 62. This makes it possible to set the camera unit 5 with the wire 4 attached onto the guide rail 2, and then install the charging unit 6 onto the guide rail 2 so as to cover the wire 4 from the outside.

[0048] The roller 63 is used to move the charging unit 6 up and down along the guide rail 2. The roller 63 is positioned in grooves 22 on two sides of the rail member 20, excluding the side facing the charging unit 6 and the opposite side, and travels within these grooves 22. This allows the charging unit 6 to be moved up and down while maintaining its planar position.

[0049] Pin 64 is provided so as to protrude downward from the bottom surface of the charging unit 6 and is movable in the vertical direction. Pin 64 is for detecting contact with the camera unit 5.

[0050] Specifically, as shown in Figure 8, when the camera unit 5 reaches a predetermined height along the guide rail 2, the upper surface of the camera unit 5 contacts the lower surface of the charging unit 6, pushing the pin 64 upward. When the control unit (not shown) of the charging unit 6 detects that the pin 64 has been pushed in, i.e., that the camera unit 5 and the charging unit 6 have come into contact, it transmits a message to the winch control unit via the cable 35 indicating that the camera unit 5 and the charging unit 6 have come into contact. This stops the winding of the wire 4. However, since the camera unit 5 cannot stop abruptly while rising, when it comes into contact with the charging unit 6, the camera unit 5 pushes the charging unit 6 upward as indicated by arrow e, and the suspension member 25 slackens slightly.

[0051] If the height of the charging unit 6 were fixed, there would be a risk of damage to the charging unit 6 due to the impact when it comes into contact with the camera unit 5. However, in this embodiment, the charging unit 6 is suspended and supported without a fixed height, and is pushed up when it comes into contact with the camera unit 5, thereby mitigating the impact and preventing damage.

[0052] Furthermore, when the winch control unit of the winch unit 3 receives notification that the camera unit 5 and the charging unit 6 have come into contact, it stops winding the wire 4 as described above, and also transmits to a computer in the construction office or elsewhere that the camera unit 5 is in the charging position. In addition, charging of the camera unit 5's battery 54 via the wireless charger 61 of the charging unit 6 starts automatically when the charging unit 6 and the camera unit 5 come into close proximity. The camera unit 5 may also be configured to turn off the power to the camera device 51 and the wireless communication device 55 when charging starts (voltage change). This prevents discharge during charging. The heat dissipation mechanism 521 dissipates the heat generated during charging by the charging unit 6.

[0053] The wire position adjustment mechanism 7 adjusts the planar position of the wire 4 extending from the winch unit 3 to match the planar position of the guide rail 2 when the planar positions of the winch unit 3 and the guide rail 2 (camera unit 5) are different. The wire position adjustment mechanism 7 is used attached to the single pipe 201 of the temporary scaffolding 200, but is not limited to this. It can also be attached to a single pipe supported by the structure 100.

[0054] Figure 9 shows the wire position adjustment mechanism 7. The wire position adjustment mechanism 7 includes a gripping part 71, a first rail 72, a slider 73, a second rail 74, a pulley 75, etc.

[0055] The gripping section 71 grips the single pipe 201 and attaches the wire position adjustment mechanism 7 to the single pipe 201.

[0056] The first rail 72 is arranged in two stages, upper and lower, so as to extend outward from the gripping portion 71. The second rail 74 is positioned above the first rail 72. The second rail 74 is a rail that is perpendicular to the first rail 72 in a plan view, and a pair of them are arranged with a gap between them in the direction of extension of the first rail 72, and are connected to each other.

[0057] The first rail 72 and the second rail 74 use rail members similar to the rail member 20 (see Figure 2) described above. The slider 73 is inserted into the groove 721 of the first rail 72 and can move along the first rail 72. The slider 73 is fixed to each side of the pair of second rails 74, and as the slider 73 moves along the first rail 72, the second rail 74 moves along the first rail 72.

[0058] The pulleys 75 are for attaching the wire 4 and are positioned on the second rail 74. A pair of pulleys 75 are positioned spaced apart along the longitudinal direction of the second rail 74, and each is movable along the second rail 74. The wire 4 hanging from the winch unit 3 is attached to one pulley 75, and the wire 4 hanging from the other pulley 75 is attached to the camera unit 5.

[0059] By adjusting the orientation of the gripping portion 71, the extension direction of the first rail 72 can be changed, and by adjusting the position of the second rail 74 in the longitudinal direction of the first rail 72 and the position of each pulley 75 in the longitudinal direction of the second rail 74, the planar position of the wire 4 extending from the winch unit 3 can be adjusted to match the planar position of the guide rail 2.

[0060] As described above, the monitoring device 1 of this embodiment allows monitoring at different heights with a single camera by raising and lowering the camera unit 5 by winding and unwinding the wire 4. Therefore, there is no need to install cameras on each floor of the building, reducing installation effort, and there is no need to move or remove cameras according to the progress of construction on each floor. Moreover, since the camera unit 5 is charged by the charging unit 6 at a predetermined height along the guide rail 2, the effort required for battery replacement of the camera unit 5 is greatly reduced. Furthermore, the camera unit 5 does not require power cords or other cables, so there is no interference between cables and the wire 4, and measures to prevent snagging or tripping on cables are unnecessary. In addition, the video captured by the camera unit 5 can be transmitted to a remote construction office etc. via the wireless communication device 55, so there is no need to lay LAN cables.

[0061] The monitoring device 1 of this embodiment enables real-time and immediate monitoring of construction progress and safety management by remotely monitoring the construction site, thereby realizing the aforementioned reduction in manpower and work style reform. In addition, the retractable camera unit 5 is easily recognizable by workers, which helps maintain their sense of vigilance.

[0062] Furthermore, in this embodiment, the charging unit 6 is suspended and supported from above by a suspension member 25 and is installed above the camera unit 5 without fixing its height. As explained in Figure 8, the impact when the camera unit 5 and the charging unit 6 come into contact can be mitigated, and damage to the charging unit 6 can be prevented.

[0063] In this embodiment, a wire 4 is passed through a recess 62 in the charging unit 6, and the camera unit 5 located below the charging unit 6 can be raised and lowered by the wire 4. Furthermore, since the wire 4 passes through a recess 62 rather than a hole, it becomes possible to set the camera unit 5 with the wire 4 attached onto the guide rail 2 before installing the charging unit 6.

[0064] Furthermore, in this embodiment, the wire position adjustment mechanism 7 allows the position of the wire 4 unwound from the winch unit 3 to be adjusted to match the guide rail 2 (camera unit 5), thereby improving the degree of freedom in the installation position of the winch unit 3. In addition, by constructing the wire position adjustment mechanism 7 with the aforementioned gripping part 71, rails 72 and 74, and pulley 75, the wire position adjustment mechanism 7 becomes simpler, and the position of the wire 4 can be easily adjusted.

[0065] Furthermore, since the guide rail 2 is constructed by attaching multiple upper and lower rail members 20 to single pipes 201 of the temporary scaffolding 200 or single pipes supported by the main structure 100, the guide rail 2 of any height can be easily installed at the optimal location using the temporary scaffolding 200 or the main structure 100.

[0066] Furthermore, in the camera unit 5 of this embodiment, as explained in Figure 6, etc., by combining the rotation of the shooting device 51 and the rotation of the arm member 53 using the sensor 512, the shooting device 51 can capture images over a wide area, enabling wide-area surveillance. It is also possible to avoid the base 52 and guide rail 2 behind the shooting device 51 and capture the area behind the camera unit 5.

[0067] Furthermore, the winch unit 3 of this embodiment is equipped with a wireless communication device 32 for remote operation, allowing the camera unit 5 to be raised and lowered remotely. Such a camera unit 5 contributes to the aforementioned work style reforms, and also contributes to business continuity on site, as it allows for the assessment of building damage unattended even if disasters such as earthquakes or typhoons occur at night or during business hours.

[0068] Furthermore, in this embodiment, the alarm device 59 provides an alarm when the camera unit 5 is raised or lowered, which alerts the worker and prevents contact with the camera unit 5. It is also expected to improve the worker's safety awareness.

[0069] However, the present invention is not limited to the above embodiments. For example, in the above embodiments, the monitoring device 1 was installed between the temporary scaffolding 200 and the building structure 100 using the temporary scaffolding 200 provided along the building structure 100. However, the monitoring device 1 can also be installed in places other than between the temporary scaffolding 200 and the building structure 100, such as openings for elevators or openings used as atriums within the building structure 100.

[0070] In this embodiment, the winch unit 3 is installed above the guide rail 2, but by providing pulleys or the like (not shown) to guide the wire 4, it is also possible to install the winch unit 3 in other locations, such as the floor surface below the guide rail 2. For example, by installing the winch unit 3 on the floor surface below the guide rail 2, it becomes unnecessary to place heavy objects at a high place. Also, since access to the winch unit 3 becomes easier, it is suitable for manual operation.

[0071] Furthermore, the camera unit 5 is not limited to the configuration described above. For example, in this embodiment, the camera unit 5 is equipped with an alarm device 59, but by mounting audio input / output devices such as microphones and speakers on the camera unit 5, voice communication can be conducted between supervisors at construction offices and workers on site. In addition, it is possible to expand the range that can be monitored by the camera unit 5 by making the arm member 5 extendable or making the entire camera unit 5 horizontally movable.

[0072] In this embodiment, the charging unit 6 is installed above the camera unit 5 at the upper end of the guide rail 2, but the charging unit 6 may also be installed below the camera unit 5 at the lower end of the guide rail 2. This makes it easier to access the charging unit 6 and simplifies maintenance of the charging unit 6. In this case, the wireless charger 61 may be installed on the top surface of the charging unit 6. However, if the winch unit 3 is installed above the guide rail 2 and the charging unit 6 is installed at the lower end of the guide rail 2, a separate power supply (not from the winch unit 3) will be required for the charging unit 6.

[0073] Furthermore, while the monitoring device 1 of this embodiment is used at construction sites, it can also be used at construction sites during demolition. In addition to construction sites, it can also be used in buildings in use, such as factories, warehouses, music venues, and sports facilities.

[0074] Preferred embodiments of the present invention have been described above with reference to the attached drawings, but the present invention is not limited to these examples. It will be obvious to those skilled in the art that various modifications or alterations can be conceived within the scope of the technical idea disclosed herein, and these will naturally also fall within the technical scope of the present invention. [Explanation of Symbols]

[0075] 1: Monitoring device 2: Guide rail 3: Winch Unit 4: Wire 5: Camera Unit 6: Charging Unit 7: Wire position adjustment mechanism 20: Rail component 31: Winch 32, 55: Wireless communication devices 51: Imaging device 53: Arm component 54: Battery 59:Alarm device 61: Wireless charger 62: Recess 71: Grip part 72: The first rail 74: The second rail 75: Pulley 100:Structure 200: Temporary scaffolding 201: Single pipe 512: Sensor

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