JP2018037228A - Detection sensor and structure including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal body detection sensor capable of detecting whether a movable metal body is in a predetermined position without contacting the metal body and capable of suppressing the time and effort of position adjustment.SOLUTION: A detection sensor 1 includes: a magnetic sensor 12 capable of detecting a magnetic flux; a magnet 13 disposed on a side of the magnetic sensor; a determination unit 14 capable of determining that the metal body approached the magnetic sensor on the basis of the detected value of the magnetic flux amount of the magnetic sensor.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a detection sensor and a structure including the detection sensor.

  Conventionally, a structure in which opening / closing of a door can be confirmed has been adopted. For example, as shown in FIGS. 33 and 34, it is known that the approach of the door 920 is detected by a limit switch 930. Such a structure is also described in Patent Document 1. Further, as shown in FIGS. 35 and 36, a structure is known in which a magnet 950 is provided on the door 920 side, a magnetic sensor 940 is provided on a box body 910 to which the door 920 is attached, and opening / closing of the door 920 is detected. A similar structure is also described in Patent Document 2. In such a structure, the opening / closing of the door 920 is detected by detecting the amount of magnetic flux or the like.

JP 2010-88280 A JP 2007-198053 A

  By the way, in the structure using the limit switch, when the door is closed, the switch is pushed in as shown in FIG. In such a structure, since the limit switch 930 and the door 920 hit each time the door 920 is closed, the surface of the door 920 is damaged. Further, when the position of the limit switch 930 is shifted due to vibration during transportation, the amount of pressing of the switch when the door 920 is closed becomes insufficient, and it may not be detected that the door 920 has closed the opening. Furthermore, when this occurs, there is a problem that it takes time to adjust the position of the limit switch 930.

  In the structure using the magnet 950 and the magnetic sensor 940 for each of the door 920 and the box body 910, as shown in FIG. 36, the magnet 950 and the magnetic sensor 940 need to be adjacent to each other when the door 920 is closed. . If the positions of the magnet 950 and the magnetic sensor 940 are shifted for some reason, the magnetic field may not be detected. Further, when such a situation occurs, it is necessary to adjust the positions of the magnet 950 and the magnetic sensor 940. However, when the door 920 is closed, the magnet 950 and the magnetic sensor 940 are accommodated inside the housing. . Accordingly, it is difficult to adjust the positions of the magnet 950 and the magnetic sensor 940 while visually observing the positional relationship between the magnet 950 and the magnetic sensor 940, and there is a problem that it takes time to adjust the position. Furthermore, although the magnet 950 is provided in a part different from the part provided with the magnetic sensor 940, the part provided with the magnet 950 has a problem that unevenness due to the magnet 950 is generated and the appearance is not good. .

  The inventor of the present case tried to solve the problem by diligently examining this point. An object of the present invention is to provide a metal body detection sensor and a detection sensor that can detect whether or not a movable metal body is in a predetermined position without contact with the metal body, and can suppress the labor of position adjustment. Is to provide a body.

  In order to solve the above problems, the following means are adopted. The first means determines that a metal body has approached the magnetic sensor based on the magnetic sensor capable of detecting the magnetic flux, the magnet arranged on the side of the magnetic sensor, and the detected value of the magnetic flux amount of the magnetic sensor. It is a detection sensor provided with a possible determination part.

  In the first means, a second means having a setting unit capable of setting a threshold value for determining the approach of the metal body with respect to the detected value of the magnetic flux amount of the magnetic sensor is preferable.

  In the first or second means, a third means having a configuration including an adjustment unit capable of adjusting the position of the magnetic sensor or the magnet is preferable.

  4. The detection sensor according to claim 1, wherein at least one side of the main body and the structure including the movable part installed on the main body is a metal body, and the other side is provided with the detection sensor according to claim 1. By providing, the 4th means made into the structure which can determine that the movable part approached the predetermined position of the main-body part is preferable.

  According to a fourth aspect, the structure in which the main body portion stores electrical and electronic equipment and the movable portion is a door has a plurality of doors, and each of the detection sensors corresponds to a closed position of each door. The 5th means set as the structure by which each magnet is provided is preferable.

  In the present invention, it is possible to detect whether or not a movable metal body is at a predetermined position without contact with the metal body, and a metal body detection sensor capable of suppressing labor for position adjustment and a structure including the detection sensor Can be provided.

It is the figure which showed the state which the detection sensor and the door of the metal body are located away. It is the figure which showed the state in which the detection sensor and the door of a metal body are located adjacent. It is the perspective view which showed the state which attached the detection sensor to the box main body of the box for electrical and electronic equipment accommodation. It is sectional drawing which showed the magnetic sensor periphery in the state which closed the door of the electrical-electronic equipment storage box shown in FIG. It is sectional drawing which showed the magnetic sensor periphery in the state which opened the door of the electrical / electronic equipment storage box. It is the figure which showed the relationship between the magnetic flux amount in the state of FIG. 5, and time. It is sectional drawing which showed the magnetic sensor periphery in the state before closing the door of the box for electrical and electronic equipment storage. It is the figure which showed the relationship between the magnetic flux amount in the state of FIG. 7, and time. It is sectional drawing which showed the magnetic sensor periphery in the state which closed the door of the box for electrical and electronic equipment accommodation. It is the figure which showed the relationship between the magnetic flux amount in the state of FIG. 9, and time. It is sectional drawing which showed the magnetic sensor periphery in the state which closed the door of the box for electrical and electronic equipment accommodation. It is the figure which showed the state which the detection sensor and the door of the metal body adjoin, and the magnet and the door are separated. It is the figure which showed the state which the detection sensor and the door of the metal body adjoined, and the magnet and the door adjoined. It is the figure which showed the state which the detection sensor which has arrange | positioned the magnet on both sides of the magnetic sensor, and the door of the metal body are located away. It is the figure which showed the amount of magnetic flux in the state of FIG. 14, and the relationship of time. It is the figure which showed the state which the detection sensor which has arrange | positioned the magnet on both sides of a magnetic sensor, and the door of a metal body are located in the magnetic sensor side a little rather than FIG. It is the figure which showed the relationship between the magnetic flux amount in the state of FIG. 16, and time. It is the figure which showed the state which the detection sensor which has arrange | positioned the magnet to the both sides of a magnetic sensor, and the door of a metal body are adjoining. It is the figure which showed the amount of magnetic flux in the state of FIG. 18, and the relationship of time. It is the perspective view which showed the box for electrical and electronic equipment storage provided with the door which can be opened. It is the figure which showed distribution of the magnetic flux in the state which opened both the doors which can be opened. It is the figure which showed distribution of the magnetic flux at the time of opening one side of the door which can be opened. It is the figure which showed the state which pulled out the slide part of the wiring storage unit. It is the figure which showed the state which accommodated the slide part of the wiring storage unit. It is a perspective view of a charging device. It is the perspective view which showed the state which inserted the charging gun in the gun holder. It is the figure which showed the state which removed the charging gun from the gun holder. It is the figure which showed the relationship between the magnetic flux amount in the state of FIG. 27, and time. It is the figure which showed the state which accommodated the charging gun in the gun holder. FIG. 30 is a diagram showing the relationship between the amount of magnetic flux and time in the state of FIG. 29. It is the figure which showed the state in which the charging gun is not fully stored in the gun holder. FIG. 32 is a diagram showing the relationship between the amount of magnetic flux and time in the state of FIG. 31. It is the perspective view which showed arrangement | positioning of the detection sensor (limit switch) in a prior art. It is the figure which showed the positional relationship of a detection sensor and a door at the time of closing the door shown in FIG. It is the perspective view which showed arrangement | positioning of the detection sensor (magnetic sensor) in a prior art. It is the figure which showed the positional relationship of a detection sensor and a magnet at the time of closing the door shown in FIG.

  The form for implementing this invention is shown below. In each figure, a broken line drawn adjacent to the magnet 13 represents a line of magnetic force. The detection sensor 1 according to the present embodiment includes a magnetic sensor 12 capable of detecting magnetic flux, and a magnet 13 is disposed on the side of the magnetic sensor 12. In addition, the detection sensor 1 includes a determination unit 14 that can determine that a metal body has approached the magnetic sensor based on the detected value of the magnetic flux amount of the magnetic sensor 12. The modularized detection sensor 1 is arranged so that the magnetic sensor 12 and the magnet 13 are adjacent to each other. As shown in FIG. 1, when the metal body is not adjacent to the magnet 13, a predetermined magnetic flux amount is obtained. Detected. On the other hand, as shown in FIG. 2, when the metal body is adjacent to the magnet 13, the distribution of magnetic flux changes, and the amount of magnetic flux that can be detected by the magnetic sensor 12 changes. In the example shown in FIG. 2, when the metal body approaches the magnet 13, the amount of magnetic flux detected by the magnetic sensor 12 decreases. By detecting such a change in the amount of magnetic flux, it is possible to detect that the metal body is approaching or away from the magnetic sensor 12 and the magnet 13. In addition, this detection can be performed without contacting the metal body, and it is not necessary to attach the magnet 13 or the like to the moving metal body, so that it is possible to reduce the trouble of adjusting the position of the member attached to the metal body. It becomes.

  Next, an example in which the modularized detection sensor 1 is attached to an electric / electronic device storage box 6 in which electric / electronic devices are stored will be described. Note that the detection sensor 1 of the present embodiment has a magnetic sensor 12 and a magnet 13 incorporated in a resin casing. The electric / electronic device storage box 6 shown in FIG. 3 is a form in which only one door 62 serving as a movable part is provided on a box body 61 serving as a main body, and is generally referred to as a single opening. The door 62 is rotatably connected to the box body 61. The door 62 is made of metal and is a metal body detected by the detection sensor 1. Although the detection sensor 1 is attached to the box body 61, as shown in FIG. 4, when the door 62 is closed, the door 62 and the detection sensor 1 are disposed adjacent to each other. In the present embodiment, a permanent magnet 13 is used as the magnet 13. In addition, when the detection sensor 1 is applied to the electrical and electronic equipment storage box 6 made of a metal body, the detection sensor 1 can detect whether the door 62 is open and / or closed in either the box body 61 or the door 62. If the position is fixed, the opening / closing of the door 62 can be detected.

  Next, a change in the amount of magnetic flux detected by the detection sensor 1 while the door 62 changes from a state in which it is largely open to a state in which it is closed will be described. First, as shown in FIG. 5, when the door 62 is largely opened, the magnetic flux produced by the magnet 13 is not affected by the metal plate. For this reason, as shown in FIG. 6, the magnetic sensor 12 detects the amount of magnetic flux as initially set.

  Next, when the door 62 is moved slightly in the closing direction from the state shown in FIG. 5 and the door 62 is positioned as shown in FIG. 7, as shown in FIG. A slightly different value is detected from the amount of magnetic flux. More specifically, the magnetic flux amount smaller than the initial setting indicated by the broken line in FIG. 8 is detected. This is because the magnetic flux distribution has changed due to the magnetic flux concentrating on the door 62 made of metal.

  As shown in FIG. 9, when the door 62 is closed, the door 62 made of a metal plate is closest to the magnet 13. The magnetic sensor 12 detects a value different from the initial magnetic flux amount. More specifically, the magnetic flux amount smaller than the initial setting indicated by the broken line in FIG. 10 is detected. In this case, as shown in FIG. 10, a magnetic flux amount smaller than the value shown in FIG. 8 is detected. The value shown in FIG. 10 is determined by the determination unit 14 described later to be smaller than a threshold value (setting value) set by the setting unit 15 described later, and the door 62 is detected to be closed.

  When it is attempted to detect that the metal body is present in the predetermined range, the detection sensor 1 needs to detect that the metal body has changed the distribution of the magnetic flux of the magnet 13. For example, as shown in FIG. 11, when the detection sensor 1 is fixed to a box body 61 made of a metal body, with the door 62 closed, the distance B between the magnet 13 and the box body 61 is greater than It is preferable to arrange so that the distance A between the magnet 13 and the door 62 can be shortened. With such an arrangement, the amount of magnetic flux is changed by the operation of the door 62, and it is possible to reliably confirm that the door 62 is closed.

  The detection sensor 1 attached to the door 62 is configured as shown in FIG. 1, and can set a threshold value (setting value) for determining whether the magnet 13 and the metal body are close to each other and / or separated from each other. A setting unit 15 is provided. In the present embodiment, the threshold value will be described as a value for determining that the metal body has approached the detected value of the magnetic flux amount of the magnetic sensor 12. The determination unit 14 is configured to be able to determine the position of the metal with the threshold value (set value) shown in FIGS. 6, 8, and 10 set by the setting unit 15 as the detected amount of magnetic flux. . Thus, by providing the threshold value, it is possible to more accurately determine that the metal body is approaching the detection sensor 1. Therefore, for example, when the amount of magnetic flux is smaller than the initial position where the door 62 is not approaching and the door 62 is approached but the amount of magnetic flux is greater than the threshold, it is possible to detect that the door 62 is half open. Further, the determination contents can be set in detail by setting the threshold value.

  The detection sensor 1 of the present embodiment is configured to include an output unit 16 that can receive a determination result and transmit information to the outside. The output unit 16 of the present embodiment notifies a sound alarm, but may transmit information to an external device by wire or wireless.

  By the way, in many cases, it is possible to detect the opening and closing of the door 62 without adjusting the detection sensor 1, but the distance between the magnet 13 of the detection sensor 1 and the door 62 is large when the door 62 is closed. In such a case, the change in the magnetic flux amount may be small and cannot be determined. In that case, the detection sensor 1 can be adjusted. More specifically, a configuration including an adjustment unit 17 that can adjust the position of the magnetic sensor 12 or the magnet 13 may be adopted. For example, if the operation part 18 used for operating the position of the magnet 13 is attached to the magnet 13 and the operation part 18 is moved, the magnet 13 is moved from the position shown in FIG. 12 to the position shown in FIG. It becomes possible. When the adjustment unit 17 is provided, the positional relationship between the magnet 13 and the magnetic sensor 12 can be changed, and the magnetic field detected by the magnetic sensor 12 can be changed. Therefore, it is possible to set the setting more suitable for the environment.

  The number of magnets 13 provided in the detection sensor 1 is not limited to one, and the detection sensor 1 may include a plurality of magnets 13. The detection sensor 1 provided with a plurality of magnets 13 on both sides is arranged so that the magnetic flux of each magnet 13 can be detected. By adopting such a configuration, it is possible to detect not only the case where the metal body approaches from the direction facing the magnetic pole but also the approach of the metal body from a direction orthogonal to the direction.

  The detection sensor 1 of the present embodiment includes two magnets 13, and the magnetic sensor 12 is disposed so as to be sandwiched between the magnets 13. As shown in FIG. 14, when the metal door 62 is arranged at a position far from both magnets 13, the magnetic sensor 12 can detect both magnetic fluxes. In addition, the magnet 13 of the detection sensor 1 of this embodiment is arrange | positioned in parallel so that the direction of a magnetic pole may become the same. In the present embodiment, such a detection sensor 1 is used for detecting the sliding door 62. As shown in FIG. 14, in a state where the metal door 62 is sufficiently separated from the magnet 13, the amount of magnetic flux detected by the magnetic sensor 12 is as shown in FIG.

  FIG. 16 shows a state in which the door 62 is slid from the state shown in FIG. 14 and the door 62 is disposed slightly on the magnet 13 side. In the state shown in FIG. 16, the magnetic flux distribution of the magnet 13 closer to the door 62 is largely changed by the metal door 62. Of the magnetic flux caused by the magnet 13, the magnetic flux that can be detected by the magnetic sensor 12 is reduced. On the other hand, the magnetic flux distribution of the magnet 13 far from the door 62 is not significantly affected by the door 62. As a result, as shown in FIG. 17, the detected magnetic flux amount is lower than that in FIG.

  FIG. 18 shows a state where the door 62 is further slid from the state shown in FIG. 16 and the door 62 is positioned in front of both the magnets 13. In the state where the door 62 is in this position, the distribution of the magnetic flux caused by both the magnets 13 is greatly changed compared to the state shown in FIG. As a result, as shown in FIG. 19, the magnetic flux detectable by the magnetic sensor 12 is greatly reduced.

  The detection sensor 1 of this type detects the two doors 62 used in the box body 61 of the electric / electronic equipment storage box 6 having a plurality of double doors 62 as shown in FIGS. Can be applied to. As understood from FIGS. 20 to 22, in the present embodiment, when the detection sensor 1 is arranged at a position where the two doors 62 are adjacent to each other when the doors 62 are closed, It is possible to determine whether or not it is in a closed state.

  FIG. 22 shows a state in which one door 62 is opened. By disposing each magnet 13 at a position where it can face each door 62, it is possible to determine the state in which the door 62 is opened or closed.

  As described above, the detection sensor 1 can be used to know whether the door 62 is opened or closed, but can also be used to know other information. For example, it can be used to detect the storage of the wiring storage unit 8. As shown in FIG. 23, when the wiring storage unit 8 includes a slidable slide portion 72 that is a movable portion with respect to the case portion 71 that is a main body portion, the slide portion 72 is retracted to the back of the case portion 71. In order to know whether or not the slide portion 72 has been pulled out by a predetermined amount or more, the detection sensor 1 can be used. In the example shown in FIG. 23, the detection sensor 1 is attached to the rear part of the slide part 72. As shown in FIG. 24, in the state where the slide portion 72 is sufficiently housed in the case portion 71, the metal on the case portion 71 side affects the magnetic flux distribution of the magnet 13 provided in the detection sensor 1. By detecting the value of the amount, it is possible to determine whether or not the state is in this state.

  Further, it is not always necessary for the metal body to slide or rotate. For example, it can be used to determine whether or not it has been returned to a predetermined position. When applied to the automobile charging device 9 as shown in FIG. 25, it becomes possible to know that the charging gun 81 connected to the automobile has been properly returned to the charging device 9.

  The charging device 9 is provided with a gun holder 82 as shown in FIGS. 26 and 27, and the charging gun 81 is required to be returned to the gun holder 82 after the charging operation is completed. In the present embodiment, as shown in FIG. 27, the detection sensor 1 is fixed to a gun holder 82 serving as a main body. The charging gun 81 serving as a movable part partially includes a metal body. As shown in FIG. 27, when the gun holder 82 and the charging gun 81 are sufficiently separated, a magnetic flux amount as shown in FIG. 28 is obtained. On the other hand, as shown in FIG. 29, when the charging gun 81 is securely stored in the gun holder 82, the amount of magnetic flux is greatly reduced as shown in FIG.

  The charging gun 81 is not always returned so as to be firmly received, and may be in an insufficient insertion state as shown in FIG. In this case, the amount of magnetic flux is as shown in FIG. That is, the amount of magnetic flux is detected differently from the state in which the charging gun 81 is firmly fitted in the gun holder 82 and the state in which the charging gun 81 and the gun holder 82 are separated. Accordingly, a threshold is set for such a magnetic flux amount, and when a magnetic flux amount corresponding to the threshold value is detected, a message indicating that the charging gun 81 is not fully fitted is displayed, or a voice is displayed. You can tell the situation to the user.

  Although several embodiments have been described above, the present invention is not limited to the above-described embodiments, and various aspects can be made. For example, the arrangement of the detection sensors may be selected within a range that satisfies the desired performance.

  It is also possible to make the magnetic sensor movable by providing an operation portion protruding from the magnetic sensor.

  The determination unit only needs to be determined based on increase / decrease in the amount of magnetic flux detected by the magnetic sensor, and it is also possible to perform some determination when the amount of magnetic flux reaches a predetermined value increased from the initial state. .

  It is also possible to arrange a plurality of magnets around the permanent magnet. Thereby, since the increase / decrease in the amount of magnetic flux increases, it becomes possible to accurately determine that the door is closed or opened. Such a structure can also be applied to a sliding door or a double door type door.

  The detection sensor can also be used to detect that a predetermined unit is mounted on the electrical / electronic equipment storage box.

  The positional relationship between the magnet and the magnetic sensor may be adjustable by adopting not only a movable type that moves the entire single magnet but also a retractable type that allows a part of the magnet to fall.

  Even when the object to be measured is a magnetic object such as a resin, the position of the object to be measured can be detected by attaching a metal plate or the like to the object to be measured.

  As for the structure, it is sufficient that at least one side of the structure composed of the main body and the movable portion installed in the main body is a metal body, and that the movable portion has approached a predetermined position by providing a detection sensor on the other side. What is necessary is just to enable determination.

  An electrical / electronic equipment storage box configured as a structure in which electrical / electronic equipment is housed in the main body and the movable part is a door has a plurality of doors. The magnets of the detection sensors may be provided.

DESCRIPTION OF SYMBOLS 1 Detection sensor 12 Magnetic sensor 13 Magnet 14 Determination part 15 Setting part 17 Adjustment part 61 Box main body 62 Door

Claims (5)

  A magnetic sensor capable of detecting magnetic flux, a magnet arranged on the side of the magnetic sensor, and a determination unit capable of determining that a metal body has approached the magnetic sensor based on the detected value of the magnetic flux amount of the magnetic sensor. Detection sensor.   The detection sensor of Claim 1 provided with the setting part which can set the threshold value which determines the approach of a metal body with respect to the detected value of the magnetic flux amount of a magnetic sensor.   The detection sensor according to claim 1, further comprising an adjustment unit capable of adjusting the position of the magnetic sensor or the magnet.   At least one side of the structure composed of the main body and the movable portion installed in the main body is a metal body, and the movable portion approaches a predetermined position by including the detection sensor according to claim 1 on the other side. A structure that can be used to determine what has been done.   The main body contains electrical and electronic equipment, and the structure in which the movable part is a door has a plurality of doors, and a magnet for a detection sensor is provided corresponding to the closed position of each door. The structure according to claim 4.