Electromagnetic rod device of transporting means having plurality of unit steps

Abstract

The present invention relates to an electromagnetic rod device of a transporting means having a plurality of unit steps. Disclosed, according to the present invention, are an electromagnetic rod device and a braking system incorporating same, the electromagnetic rod device comprising: a solenoid unit that has a moving rod thereinside and a coil installed to wrap around the moving rod; and a rod position sensing and power supply unit that includes a printed circuit board having a through hole of a predetermined radius in the center thereof, the through hole being disposed perpendicularly to the direction of movement of the moving rod. The electromagnetic rod device of a transporting means having a plurality of unit steps, according to the present invention, may detect the engagement of a retainer block and a stop pin by using a non-contact switch, thereby preventing failure due to wear even with prolonged use.

Description

Electromagnetic loading device for a moving vehicle having multiple unit steps

[0001] The present invention relates to an electromagnetic load device for a moving means having a plurality of unit steps, and more particularly, to an electromagnetic load device for a moving means having a plurality of unit steps having a switch for checking whether a stopper connected to a retainer block formed on a brake disc is engaged or disengaged.

[0002] Many buildings are equipped with various means of transportation to facilitate the movement of people. These include elevators, escalators, and moving walkers. Elevators are machines that move passengers vertically between multiple floors, while escalators replace stairs by moving passengers one floor at a time using multiple step units. Moving walkers are devices that move passengers horizontally using multiple step units.

[0003] Escalators and moving walkers are powered by electricity, which consumes significant power. To conserve energy, they are operated by stopping them when there are no passengers for a set period of time and then restarting them when a passenger enters. To provide this function, escalators and moving walkers are equipped with an electromagnetic load device, a component of the braking system.

[0004] However, in the past, there was an inconvenience in that the electromagnetic load device had to be replaced periodically because it wore out and broke down due to repeated stopping and starting in escalators or moving walkers.

[0005] The purpose of the present invention is to provide an electromagnetic load device for a moving means having a plurality of unit steps that does not cause breakdown due to wear even when used for a long period of time.

[0006] The above object of the present invention can be achieved by an electromagnetic loading device having a braking system including a brake drum and a brake lining that performs braking by friction with the brake drum, and which loosely adjusts the brake lining when stopping and then restarting the plurality of unit steps in a moving means that moves a plurality of unit steps, the electromagnetic loading device including a solenoid unit having a moving rod inside and a coil installed to surround the moving rod, and a load position sensing and power supply unit including a printed circuit board having a through hole having a predetermined radius in the center and vertically arranged while facing the direction in which the moving rod moves, wherein the load position sensing and power supply unit is mounted on an upper portion of the through hole area of ​​the printed circuit board having the through hole or an edge area around the through hole, and characterized in that it includes a non-contact position detection sensor that detects the final position of the moving rod.

[0007] Here, the upper portion of the through hole area means any one area extending in the direction of movement of the moving load the area occupied by the through hole in the printed circuit board having the through hole, and the edge area around the through hole means an area adjacent to the edge of the through hole among the upper surface of the printed circuit board having the through hole.

[0008] The electromagnetic load device of a moving means having a plurality of unit steps according to the present invention can detect that the retainer block and the stop are engaged using a non-contact switch, so that no failure due to wear occurs even when used for a long time.

[0009] For example, the conventional safety catch detection device used in Schindler escalators used switches that wore out over time, necessitating periodic replacement of the electromagnetic load mechanism. Because the manufacturer didn't sell the worn switches separately, the entire safety catch detection device, which cost up to 1 million won, had to be replaced, resulting in significant labor costs.

[0010] The electromagnetic load device of a moving means having a plurality of unit steps according to the present invention can reduce the power applied to the electromagnet by using a non-contact switch, thereby preventing switch failure due to wear and tear, thereby saving the cost of purchasing parts that would otherwise require periodic replacement, and further saving the maintenance cost accordingly.

[0011] Figure 1 is a side view of an escalator and a schematic diagram of a braking system applied thereto.

[0012] Figure 2 is a right side view of a part of Figure 1.

[0013] Figure 3 is a configuration diagram of an electromagnetic loading device according to the present invention.

[0014] Figure 4 is an explanatory diagram explaining the operation of a limit switch provided in a load position sensing and power supply unit constituting a conventional electromagnetic load device.

[0015] Figure 5 is a detailed configuration diagram of a conventional limit switch.

[0016] Figures 6 to 8 are exploded perspective photographs of a conventional electromagnetic loading device.

[0017] Figure 9 is a configuration diagram of a load position sensing and power supply unit constituting an electromagnetic load device according to one embodiment of the present invention.

[0018] Figure 10 is a circuit block diagram provided on a printed circuit board having a through hole constituting an electromagnetic load device according to the present invention.

[0019] Figure 11 is an example of a partial circuit diagram of a magnetic sensor and a coil power supply unit provided on a printed circuit board having a through hole constituting an electromagnetic load device according to the present invention.

[0020] Figure 12 is a configuration diagram of a load position sensing and power supply unit constituting an electromagnetic load device according to one embodiment of the present invention.

[0021] 1: Main shaft 10: Solenoid unit

[0022] 11: Movement load 20: Load position sensing and power supply unit

[0023] 30: Terminal part 40: Wrinkle part

[0024] 50: Limit switch 51: Gulim font

[0025] 52: Switch support 53: Top plate

[0026] 55: Lower plate 57: Switch contacts

[0027] 61: Printed circuit board

[0028] 63: Through-hole printed circuit board, through-hole printed circuit board

[0029] 71: PCB support 73: Magnetic

[0030] 75: Magnetic sensor 81: AC / DC converter

[0031] 83: Coil power supply unit

[0032] 85: Switching signal generation unit

[0033] 85-1: Switch rectifier

[0034] 85-2: Relay switch section

[0035] 100: Electromagnetic load device 200: Support shelf

[0036] 210: 1st screw rod 220: 2nd screw rod

[0037] 230: First connecting flight 240: First fixed flight

[0038] 250: Spring 260: First Transmission

[0039] 270a: Lining first holder part 270b: Lining second holder part

[0040] 280: Support member

[0041] 301: Brake drum 303: Brake disc

[0042] b1: first bolt b2: second bolt

[0043] b3: third bolt b4: fourth bolt

[0044] b5: 5th volt b6: 6th volt

[0045] SW1: First switch

[0046] The terminology used in the present invention is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this specification, it should be understood that the terms "comprise" or "have" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0047] Additionally, in this specification, "on or above" means located above or below the target portion, and does not necessarily mean located on the upper side with respect to the direction of gravity. Furthermore, when a portion such as an area, plate, etc. is said to be "on or above" another portion, this includes not only cases where it is in contact with or spaced apart from the other portion "directly on or above" the other portion, but also cases where there is another portion in between.

[0048] Additionally, in this specification, when a component is referred to as being “connected” or “connected” to another component, it should be understood that the component may be directly connected or connected to the other component, but may also be connected or connected via another component in between, unless there is a specific description to the contrary.

[0049] Additionally, in this specification, terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

[0050]

[0051] Escalators and moving walkways differ only in whether their multiple metal unit steps move in an inclined or horizontal direction, but their overall structure, operating method, and braking method are very similar. While the present invention will primarily be described with reference to escalators, the description of the present invention is also applicable to moving walkways. Therefore, the present invention should be understood to apply to any transportation means having multiple unit steps, including escalators and moving walkways.

[0052]

[0053] Hereinafter, in order to enable those skilled in the art to easily practice the present invention, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0054] Fig. 1 is a side view of an escalator and a schematic diagram of a braking system applied thereto, and Fig. 2 is a portion of the right side view of Fig. 1. The upper drawing of Fig. 1 is a side view of a typical escalator and a perspective drawing of some of its driving parts, and the lower drawing is a separate drawing of the braking system portion of the upper drawing. The braking system according to the present invention will be described using Figs. 1 and 2.

[0055] An escalator braking system is composed of a support rack (200), a main shaft (1), a brake disc (303), a brake drum (301), a brake lining (305), and a lining drive unit that drives the brake lining (305). The main shaft (1), the brake disc (303), and the brake drum (301) are components that rotate together with the main shaft (1), which rotates along a drive shaft that drives the escalator. The brake lining (305) brakes the escalator by friction with the brake drum (301).

[0056] The lining drive unit is composed of an electromagnet load device (100), a first screw rod (210), a second screw rod (220), a first connecting piece (230), a first fixing piece (240), a spring (250), a first transmission piece (260), a first lining holder part (270a), a second lining holder part (270b), and a support member (280). As shown in Fig. 2, the braking system is also composed of components without reference symbols, but since these components are unrelated to the present invention, they will not be described.

[0057] The support shelf (200) is formed with a certain depth cut inward so that the first connecting piece (230) can move by a distance d1.

[0058] An electromagnet load device (100) is attached to the lower part of the support shelf, a screw groove is formed on the inner side of the end face of the moving rod (11), and a first screw rod (210) is fastened to the screw groove by a first bolt (b1). A lower area of ​​a first connecting piece (230) is fastened to the first screw rod (210) by using a second bolt (b2) and a third bolt (b3). When the moving rod (11) moves in the direction of the arrow, the first connecting piece (230) can be moved by a distance d1 in the cut-out area of ​​the support shelf (200).

[0059] The second screw rod (220) is fastened to the upper region of the first connecting piece (230) by the fifth bolt (b5) and the sixth bolt (b6). The first fixing piece (240) is fixedly installed on the upper portion of the support shelf. One end of the second screw rod (220) is fixed through a screw through hole formed in the first fixing piece (240), and the other end is pivotally connected using the first transmission piece (260) and the first pivot (p1). The second screw rod (220) is fastened through the through hole formed in the upper region of the first connecting piece (230) and the fifth bolt (b5) and the sixth bolt (b6). A fourth bolt (b4) is installed between the first fixing piece (240) and the fifth bolt (b5) on the second screw rod (220), and a spring (250) is installed so as to fit around the second screw rod (220) between the first fixing piece (240) and the fourth bolt (b4). One end of the spring (250) is fixed to the first fixing piece (240), and the other end is fixedly installed to the fourth bolt (b4) by welding or other means.

[0060] One end of the first transmission member (260) is pivotally connected by the second screw rod (220) and the first pivot (p1) as described above, and the other end is pivotally fixed to the upper part of the support shelf (200) by the second pivot (p2) so as to be able to pivot. On the upper part of the support shelf (200) ' ' A support (280) of the shape is installed. The support (280) is ' ' It is a configuration that supports the first transmission piece (260) to move with minimal friction in the central region of the shape. One end of the brake lining (305) is connected to the second lining holder part (270b) that is installed to be fixed to the support shelf (200), and the other end is pivotally connected to the first transmission piece (p3) by the third pivot (p3).

[0061] When power is applied to the electromagnet load device (100), the moving rod (11) moves in the direction of the arrow, and as a result, the first connecting piece (230) moves in the direction of the arrow and moves the second screw rod (220). At this time, the spring (250) connected to the second screw rod (220) is compressed. The second screw rod (220) moves linearly, and the first transmission piece (260) fixed thereto pivotally moves downward in the drawing with the second pivot (p2) as the rotation axis. When the first transmission piece (260) pivotally moves, the first lining holder part (270a) pivotally connected to the first transmission piece (260) through the third pivot (p3) loosens the brake lining (305), thereby releasing the braking and allowing the escalator to operate again.

[0062] When there is no user for a certain period of time, the power applied to the electromagnetic load device (100) is cut off, the compressed spring (250) is tensioned to its original state, and the first connecting piece (230) moves to its original state, and the second screw rod (220) is also returned to its original position. The second screw rod (220) moves linearly, and the first transfer piece (260) fixed thereto also returns to its original position with the second pivot (p2) as its pivot axis. As the first transfer piece (260) returns to its original state, the first lining holder (270a) pivotally connected to the third pivot (p3) pulls the brake lining (305), causing friction with the brake drum (301) to brake, thereby stopping the escalator.

[0063]

[0064] Fig. 3 is a configuration diagram of an electromagnetic load device according to the present invention. The electromagnetic load device (100) is composed of a solenoid portion (10), a load position sensing and power supply portion (20), a terminal portion (30), and a fold portion (40), and a movement rod (11) is provided at an internal horizontal center. The solenoid portion (10) is configured to include a coil wound around the movement rod (11), and when electricity is applied to the coil, an electromagnetic force is generated to move the movement rod (11) in the direction of the arrow shown in Fig. 3(a) to reach the state shown in Fig. 3(b). At this time, the volume of the fold portion (40) formed of an elastic material is reduced.

[0065] Fig. 4 is a drawing explaining the operation of a limit switch provided in a load position sensing and power supply unit constituting a conventional electromagnetic load device, and Fig. 5 is a detailed configuration diagram of a conventional limit switch. As illustrated in Fig. 4, a limit switch (50) and a printed circuit board (61) are provided in the load position sensing and power supply unit (20).

[0066] As illustrated in Fig. 5, the limit switch (50) is composed of an upper plate (53) and a lower plate (55) that are elastically joined at the edges that contact each other. A roller (51) that is fixed in rotation and provides slewing properties is provided on the front upper surface of the upper plate (53), and a switch contact (57) is provided on the front upper surface of the lower plate (55).

[0067] When electricity is applied to the solenoid part (10) as shown in Fig. 4(a), the moving rod (16) moves to the right in the drawing and touches the roller (51) provided in the limit switch (50), and the roller (51) rotates and rotates the upper plate (53) of the limit switch (50) toward the lower plate (55) with little friction, and ultimately the lower surface of the upper plate (53) comes into contact with the switch contact (57).

[0068] When the switch contact (57) comes into contact, a switching signal indicating that the brake has been released is generated on the printed circuit board (61) and transmitted to the outside through the terminal portion (30). In the switching operation illustrated in Fig. 4, it can be confirmed that the tip portion of the moving rod (11) that comes into contact with the roller of the limit switch (50) is formed to be gently inclined.

[0069] However, as explained in "Background Technology of the Invention," the escalator frequently stops and starts repeatedly, causing the electromagnetic load device to malfunction and require replacement periodically. Escalator manufacturers do not sell some of the components of the electromagnetic load device separately, so it must be replaced in its entirety. The purchase price of the electromagnetic load device alone reaches 1 million won, and including the replacement service fee, the total cost becomes a significant sum.

[0070] The inventor of the present invention disassembled the electromagnetic load device to determine the cause of the failure and found that the failure was caused by problems such as wear of the switch contact (57) of the limit switch or the roller not rolling.

[0071] FIGS. 6 to 8 are exploded perspective photographs of a conventional electromagnetic load device. FIG. 6 is an exploded perspective photograph of the entire conventional electromagnetic load device, FIG. 7 is an enlarged photograph of the load position sensing and power supply unit in FIG. 6, and FIG. 8 is a perspective photograph of a moving load constituting the conventional electromagnetic load device. As shown in FIGS. 6 and 7, it can be seen that a limit switch (50), a switch supporter (52) supporting the limit switch (50), and two printed circuit boards (61) are mounted within the load position sensing and power supply unit (20). It can be seen that the switch supporter (52) and the two printed circuit boards (61) are arranged vertically because the space of the load position sensing and power supply unit (20) is narrow. A plurality of circuit elements are mounted on two printed circuit boards (61), and a signal sensed by the positioning switch (50) is processed by these circuit elements and then transmitted to the terminal portion (30).

[0072] In Fig. 6, it can be confirmed that a part of the movement rod (11) is protruding from the left end of the solenoid section (10), and the movement rod (11) comes into contact with the roller of the limit switch (50) as it enters to the left based on the shooting direction of Fig. 6.

[0073] As can be seen from the photograph of the moving rod constituting the conventional electromagnetic loading device shown in Fig. 8, it can be seen that the end of the moving rod, indicated by the red circle, is formed to have a gentle slope so as to make smooth contact with the rolling body.

[0074] The inventor of the present invention has found that a malfunction occurs in which the switching operation is not properly recognized due to the wear of the limit switch (50) caused by frequent contact between the gently sloping end of the moving rod (11) and the roller of the limit switch (50).

[0075]

[0076] FIG. 9 is a configuration diagram of a load position sensing and power supply unit constituting an electromagnetic load device according to one embodiment of the present invention. The load position sensing and power supply unit (20) is configured to include a PCB support (71) installed to have a first length from the solenoid unit (10), a printed circuit board (63) provided with a through hole positioned perpendicular to the direction in which the moving load moves, and a circuit unit mounted on the printed circuit board (63) provided with the through hole. Hereinafter, the term "printed circuit board provided with a through hole" is abbreviated as "through hole printed circuit board."

[0077] The electromagnetic load device proposed in the present invention can be implemented by largely retaining the configuration of a conventional electromagnetic load device while modifying or replacing only some of its components. First, the end of the moving rod (11), which is positioned toward the load position sensing and power supply unit (20), is ground to form a flat surface of a certain area or greater. A magnet (73) is attached to the flat surface thus formed.

[0078] Next, the limit switch, switch support, and printed circuit board installed in the load position sensing and power supply unit (20) of the conventional electromagnetic load device are removed.

[0079] A plurality of PCB supports (71) having a first length are installed in a direction parallel to the direction in which the moving rod (11) enters the surface where the solenoid unit (10) and the load position sensing and power supply unit (20) come into contact. The PCB supports (71) are installed in an outer area where the movement of the moving rod (11) is not obstructed. It is preferable that the first length be formed shorter than the total distance that the moving rod (11) moves so that the moving rod (11) can stop beyond the through-hole printed circuit board (63) when it reaches the final position. Here, the direction in which the moving rod (11) enters refers to the direction in which the moving rod moves when electricity is applied to the solenoid unit (10), and the direction in which the moving rod (11) exits refers to the direction opposite to the entering direction.

[0080] A through-hole printed circuit board (63) is installed on the other end of the PCB support (71). The through-hole printed circuit board (63) is vertically arranged while facing the direction in which the moving rod (11) moves. At this time, the through-hole printed circuit board (63) is arranged so that the center of the through-hole (h) formed in the printed circuit board (63) is aligned with the horizontal axis of the entering moving rod (11). The through-hole printed circuit board (63) refers to a printed circuit board (63) in which a through-hole of a certain diameter is formed in the center. The certain diameter of the through-hole (h) must be provided to be larger than a size that the entering moving rod (11) can sufficiently pass through.

[0081] A magnetic sensor (75) is mounted on the through-hole printed circuit board (63). As illustrated in Fig. 9, the magnetic sensor (75) is mounted on the upper surface of the through-hole printed circuit board (63) so as to be positioned above the through-hole (h) region. Here, the upper portion of the through-hole region means at least one region among the regions extended in the direction of movement of the moving rod, which is the region occupied by the through-hole formed in the printed circuit board (63). The through-hole printed circuit board (63) is placed upright so as to be perpendicular to the direction in which the moving rod moves.

[0082] Circuit elements not shown in the drawing are mounted on the through-hole printed circuit board (63), and when the sensing value of the magnetic sensor (75) is input using the circuit elements and it is determined that the braking has been released (the moving load has reached the final position), the electromagnetic force applied to the solenoid unit (10) is reduced by 50%, and a switching signal indicating that the braking has been released is generated and transmitted to the terminal unit.

[0083] The operation of the electromagnetic load device shown in Fig. 9 will be briefly described. When electricity is applied to the solenoid unit (10), the moving rod (11) begins to move in the direction of the arrow by the electromagnetic force, and when the end of the moving rod (11) reaches the area passing through the through hole (h) formed in the through hole printed circuit board (63), a magnetic force exceeding a threshold value is detected by the magnetic sensor (75, also called a hall sensor) and the corresponding sensing value is transmitted to the through hole printed circuit board (63).

[0084] Figure 10 is a circuit block diagram provided on a through-hole printed circuit board constituting an electromagnetic load device according to the present invention. The through-hole printed circuit board (63) is provided with circuits such as an AC / DC converter (81), a magnetic sensor (75), a coil power supply unit (83), and a switching signal generator (85).

[0085] The AC / DC converter (81) is a circuit that converts the input commercial power into DC power. The converted DC power is used as the operating power of the semiconductor chip that constitutes the magnetic sensor (75), the coil power supply unit (83), and the switching signal generation unit (85). The magnetic sensor (75) is a sensor that outputs a sensing signal to switch the first switch described later when the sensed magnetic force exceeds a threshold value. For example, the magnetic sensor (75) maintains a Low state, and outputs a sensing signal that switches to a High state when a magnetic force exceeding the threshold value is detected.

[0086] The coil power supply unit (83) is a circuit unit that supplies the applied commercial power to the coil of the solenoid unit (10) and, when the magnetic force sensor (75) senses a magnetic force exceeding the threshold value and switches to a high state, reduces the power supplied to the coil by 50% and supplies it. If the commercial power that has been rectified by full-wave is supplied to the coil as it is even after the movement load unit (11) has completed, the solenoid unit (10) will deteriorate, so to prevent this, the power is supplied by reducing it by 50% after the movement load unit (11) has completed.

[0087] The switching signal generation unit (85) is a circuit unit that generates a switching state requested in advance by the escalator manufacturer and provides it to the terminal unit (30) when a magnetic force greater than a threshold value is sensed and the magnetic force sensor (75) switches to a high state. The switching state requested in advance by the escalator manufacturer means the same state as the switching state output through the terminal unit of the conventional electromagnetic load unit. Since the transfer load unit according to the present invention is a component that replaces the conventional electromagnetic load unit, the switching state provided to an external device through the terminal unit of the conventional electromagnetic load unit must be provided as is, and thus this is implemented.

[0088]

[0089] Fig. 11 is an example of a partial circuit diagram of a magnetic sensor and a coil power supply unit provided on a through-hole printed circuit board constituting an electromagnetic load device according to the present invention. The coil power supply unit is configured with a switch rectifier unit (85-1) having a first switch (SW1) and rectifying the input commercial power and supplying it to the solenoid unit (10), and a relay switch unit (85-2) that controls the first switch (SW1) on / off according to the output of the magnetic sensor (75). In the example presented in Fig. 11, the switch rectifier unit (85-1) is implemented with a bridge diode, and the first switch (SW1) is added to the circuit unit (circuit unit composed of D3 and D4) that rectifies the power. It goes without saying that various types of rectifier circuits can be used in addition to the bridge diode presented in Fig. 11.

[0090] In order to restart the escalator after it has been stopped, commercial power (AC) is supplied from the outside. At this time, since the first switch (SW1) is in the on state, full-wave rectified power is supplied to the solenoid unit (10). As the full-wave rectified power is supplied to the solenoid unit (10), the moving load moves. Until this time, the magnetic sensor (75) has a value below the threshold and thus outputs a 'Low' value. Thereafter, when the moving load reaches the final state, the output of the magnetic sensor (75) switches from the 'Low' to the 'High' state, which switches the first transistor (Tr1) of the relay switch unit (85-2) from the off state to the on state, thereby operating the first relay (Rey1). As the first relay (Rey1) is operated, the first switch (SW1) switches from the on state to the off state, and the full-wave rectified power is supplied to the solenoid unit (10), and then the power is reduced to the half-wave rectified power. Accordingly, a 50% reduced power is supplied to the solenoid unit (10), enabling stable operation without generating heat.

[0091]

[0092] Fig. 12 is a configuration diagram of a load position sensing and power supply unit constituting an electromagnetic load device according to one embodiment of the present invention. Instead of the load position sensing and power supply unit using a magnetic and magnetic force sensor presented in Fig. 9, the load position sensing and power supply unit is configured using an infrared sensor. An infrared generator (77a) and an infrared receiver (77b) are mounted at opposing positions of the through hole (h) on the upper surface of the through hole printed circuit board (63). The infrared sensor composed of the infrared generator (77a) and the infrared receiver (77b) is mounted in the peripheral edge area of ​​the through hole. Here, the peripheral edge area of ​​the through hole means an area adjacent along the edge of the through hole on the upper surface of the through hole printed circuit board.

[0093] As shown in Fig. 12(a), when the moving load (11) does not enter the through hole (h), the infrared ray irradiated from the infrared generator (77a) is received by the infrared receiver (77b), but as shown in Fig. 12(b), when the moving load (11) reaches the final state, the infrared ray irradiated from the infrared generator (77a) is blocked by the moving load (11) and is not received by the infrared receiver (77b). Instead of the magnetic sensor of Fig. 9, the load position sensing and power supply unit can be implemented using an infrared sensor composed of an infrared generator (77a) and an infrared receiver (77b).

[0094] Of course, instead of the infrared generator (77a) and infrared receiver (77b) constituting the infrared sensor being positioned facing each other with a through hole (h) in between as shown in Fig. 12, an infrared sensor that is horizontally placed adjacent to the same position or vertically stacked may also be used. In the state of Fig. 12(a), the infrared light irradiated from the infrared generator (77a) is not received by the infrared receiver (77b), but when the state of Fig. 12(b) is reached, the infrared light irradiated from the infrared generator (77a) is reflected by the moving rod (11) and incident on the infrared receiver (77b).

[0095] The load position sensing and power supply unit may be implemented using an ultrasonic sensor in addition to an infrared sensor. The magnetic sensor, infrared sensor, and ultrasonic sensor provided in the load position sensing and power supply unit may be collectively referred to as a non-contact position detection sensor.

[0096]

[0097] Although the present invention has been described with reference to the drawings exemplified above, it is to be understood that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications may be made by those skilled in the art within the scope of the technical idea of ​​the present invention. Furthermore, even if the operational effects according to the configuration of the present invention have not been explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be acknowledged.

Claims

1. In a moving means having a braking system including a brake drum and a brake lining that performs braking by friction with the brake drum and moves a plurality of unit steps, an electromagnetic loading device that loosely adjusts the brake lining when stopping and then re-driving the plurality of unit steps, A solenoid part having a moving load inside and a coil installed to wrap around the moving load; and A load position sensing and power supply unit including a printed circuit board having a through hole with a certain radius in the center and having a through hole arranged vertically while facing the direction in which the moving load moves. Including, The above load position sensing and power supply unit A non-contact position detection sensor is mounted on the upper part of the through-hole area of ​​the printed circuit board having the through-hole or on the edge area surrounding the through-hole, and includes a final position detection sensor for detecting the moving load. - The upper part of the above through-hole area means an area that extends in the direction of movement of the moving load in the area occupied by the through-hole in a printed circuit board equipped with a through-hole. - Refers to any one area selected from the areas extending in the direction of movement of the moving load in which the above through hole is formed. - The boundary area surrounding the above through hole means the area adjacent to the boundary of the through hole among the upper surface of the printed circuit board equipped with the above through hole. An electromagnetic loading device characterized by:

2. In paragraph 1, The above non-contact position detection sensor is formed as a magnetic sensor mounted on the upper part of the through-hole area of ​​a printed circuit board having a through-hole. An electromagnetic loading device characterized in that it further comprises a magnet attached to one end of the above moving load.

3. In paragraph 1, An electromagnetic loading device characterized in that the above non-contact position detection sensor is formed by an infrared sensor or an ultrasonic sensor mounted in a border area around a through hole.

4. In paragraph 1, The printed circuit board having the above through hole A switch rectifier that supplies commercial power to the coil by rectifying it by full-wave or half-wave according to the operation of the first switch and the first switch. An electromagnetic loading device further comprising a relay switch section that controls the first switch according to the sensing value of the non-contact position detection sensor.

5. In paragraph 1, One end is installed to be fixed to the surface where the solenoid part and the load position sensing and power supply part come into contact, and the other end includes a plurality of PCB supports having a first length installed to be fixed to the printed circuit board having the through hole. - The above multiple PCB supports are installed in the upper outer area of ​​the through hole area in the direction of the load position sensing and power supply section from the solenoid section - - The above first length is a length shorter than the total distance the moving load moves when electricity is applied to the coil - An electromagnetic loading device characterized by:

6. A braking system comprising an electromagnetic loading device selected from any one of claims 1 to 5.

7. A means of transport having a plurality of unit steps including any one of the electromagnetic loading devices selected from claims 1 to 5.

8. In paragraph 7, A means of transportation having multiple unit steps, characterized in that the means of transportation having the multiple unit steps is an escalator or a moving walker.

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