JP6576278B2 - Damper device and joinery - Google Patents

Description

  The present invention relates to a damper device that controls the moving speed of a moving body.

  2. Description of the Related Art Conventionally, a damper device technique that attenuates the moving speed of a moving body such as a door is known. For example, Patent Literature 1 and Patent Literature 2 disclose this type of technology.

  In Patent Document 1, when a door is in a specific half-open position, a half-open position restriction single protrusion is located in the middle of the half-open position restriction pair protrusion, and the door is half-opened regardless of whether the door is rotated in the opening or closing direction. A door check device is described that is formed so that the radial distance between the position restriction pair protrusion and the half-open position restriction single protrusion is reduced.

  Patent Document 2 has the following description regarding a technique related to a hinge (a hinge in Patent Document 2). That is, the plurality of magnets of the cylindrical member are alternately arranged with the N poles and the S poles along the circumferential direction of the inner surface of the cylindrical body at an equal angle around the central axis. The shaft member is inserted into the cylindrical member so as to be rotatable relative to the cylindrical member about the central axis. N poles or S poles are alternately arranged at an equal angle around the central axis along the rotational direction of the outer surface of the shaft body so that the plurality of magnets of the shaft member are opposed to the magnets of the cylindrical member. . When the door is closed, the polar arrangement of the magnets of the shaft member deviates from the polar arrangement of the magnets of the cylindrical member by a predetermined angle about the central axis.

JP 2005-264616 A JP 2008-1111291 A

  In any of the techniques disclosed in Patent Document 1 and Patent Document 2, the rotation of the door as a moving body is attenuated at a specific position, and the moving speed of the moving body is attenuated at a place outside the specific position. I could not. Further, since the damping force that is desired to act on the moving body such as the door differs depending on the position and moving direction, there is room for improvement in that the damping force is adjusted according to the movement of the moving body.

  An object of this invention is to provide the damper apparatus and fitting which can adjust appropriately the damping force made to act according to the moving direction and moving position of a moving body.

  The present invention is a damper device (for example, door closers 5, 5a to 5c, which will be described later, hinges 610) which controls the moving speed of a moving body (for example, door 1 which will be described later), in conjunction with the movement of the moving body. Rotating rotating shafts (for example, rotating shafts 15 and 625 described later) and the rotating shafts are linked to the rotating shafts, and their positions are changed from one side to the other side or from the other side to the one side according to the rotation direction of the rotating shaft. A moving magnet (for example, magnets 37 and 682 described later), a power generation coil (for example, power generation coils 38, 430, and 671 described later) that generates power by electromagnetic induction in accordance with the movement of the magnet, and a magnetic field A magnetic fluid (for example, magnetorheological fluids 51 and 664 which will be described later) having a property of changing viscosity and imparting a resistance corresponding to the viscosity with respect to rotation of the rotating shaft, and a magnetic field is applied to the magnetic fluid by energization. Drag coil for drag ( For example, an after-mentioned drag coil 53, 550, 670) and an output adjustment unit that adjusts a current sent from the power generation coil to the drag coil based on the moving direction of the magnet (for example, an output adjustment circuit described later) 252, 352, 452, 553, and output adjustment unit 690). Note that moving the position from one side of the magnet to the other side or from the other side to the one side includes rotational movement that changes the direction of the magnet.

  Preferably, the moving direction of the magnet is determined based on the polarity of the voltage generated by the power generating coil, and the current output sent to the drag coil is adjusted based on the moving direction.

  The damper device further includes a magnetic detection unit (for example, a GMR sensor 350 to be described later) that detects magnetism, and the moving direction of the magnet is determined based on the detected magnetism of the magnetic detection unit, and based on the moving direction. It is preferable to adjust a current sent from the power generating coil to the drag coil.

  It is preferable that the moving speed of the magnet is acquired from the detected magnetism of the magnetic detection unit, and the output of the current flowing through the drag coil is adjusted based on the moving speed.

  The damper device further includes a temperature detection unit (for example, a temperature sensor 250 described later) for detecting a temperature, and adjusts an output of a current sent to the drag coil based on a temperature detected by the temperature detection unit. preferable.

  It is preferable that the number of turns of the coil for drag or the part of the coil for power generation is larger than the number of turns of the other part.

  The present invention includes a door body (for example, a door 1 described later) attached to an opening of a building and a damper device (for example, door closers 5, 5 a to c described later, and a hinge 610) for controlling the moving speed of the door body. It is a joinery (for example, a joiner 4 described later), and the damper device rotates in conjunction with the movement of the door body (for example, rotate shafts 15 and 625 described later) and the rotation shaft. A magnet (for example, magnets 37 and 682 described later) that moves its position from one side to the other side according to the rotation direction of the rotating shaft, and electromagnetic that accompanies the movement of the magnet. A power generation coil that generates power by induction (for example, power generation coils 38, 430, and 671, which will be described later) and a property that the viscosity changes according to the magnetic field, and a resistance corresponding to the viscosity with respect to the rotation of the rotating shaft. Magnetic fluid to be applied (for example, The magnetorheological fluid 51, 664) described above, a drag coil (for example, a drag coil 53, 550, 670 described later) that applies a magnetic field to the magnetic fluid by energization, and the power generation based on the moving direction of the magnet. The present invention relates to a fitting including an output adjustment unit (for example, output adjustment circuits 252, 352, 452, and 553 described later, and an output adjustment unit 690) that adjusts a current that is sent from the coil to the drag coil.

  ADVANTAGE OF THE INVENTION According to this invention, the damper apparatus and fitting which can adjust appropriately the damping force made to act according to the moving direction and moving position of a moving body can be provided.

It is a front view of the fitting with which the door closer concerning the embodiment of the present invention is used. It is a figure which shows typically the structure of the door closer of 1st Embodiment. It is a figure which shows typically the structure of the door closer of 2nd Embodiment. It is a figure which shows typically the structure of the door closer of 3rd Embodiment. It is a figure which shows typically the structure of the door closer of 4th Embodiment. It is a figure which shows typically the structure of the hinge of 5th Embodiment. It is a disassembled perspective view of the electric power generation part of 5th Embodiment. It is a top view of the electric power generation part of 5th Embodiment.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
FIG. 1 is a front view of a fitting 4 in which a door closer 5 according to an embodiment of the present invention is used. The joinery 4 includes a frame 2 fixed to an opening of a building, a door 1 as a door, a plurality of hinges 11 that rotatably support the door 1, and a door closer 5 that controls the moving speed of the door 1. . The door 1 is a hinged door that is rotatably supported by the frame body 2 via a plurality of hinges 11.

  As shown in FIG. 1, the door closer 5 used in the fitting 4 includes a main body 6 that rotatably supports a rotary shaft 15, an arm portion 16 that is connected to the main body 6 via the rotary shaft 15, and an arm portion 16. And a link mechanism 17 that connects the frame body 2 (or the building side). The rotating shaft 15 is interlocked with the rotation of the door 1 by the arm portion 16 and the link mechanism 17. The door closer 5 controls the rotational speed of the door 1 as a moving body by attenuating the rotational force of the rotary shaft 15.

  Drawing 2 is a figure showing typically composition of main part 6 of door closer 5 of a 1st embodiment. 2, illustration of the arm part 16 and the link mechanism 17 is abbreviate | omitted. As shown in FIG. 2, inside the main body 6, a power generation unit 455 that generates power using the rotational force of the rotary shaft 15, a drag unit 50 that applies a drag to the rotary shaft 15, and an output polarity determination circuit 451 , An output adjustment circuit (output adjustment unit) 452 is provided.

  The power generation unit 455 includes a pinion 35 that is fixed to the peripheral surface of the rotary shaft 15, a rack 36 that meshes with the pinion 35, a magnet 37 that is disposed at one end in the longitudinal direction of the rack 36, and the movement of the magnet 37 And a return spring 39 disposed at the other end in the longitudinal direction of the rack 36.

  The rack 36 is supported inside the main body 6 so as to be slidable in the horizontal direction. When the pinion 35 that rotates integrally with the rotary shaft 15 rotates, the rack 36 that meshes with the pinion 35 moves horizontally according to the rotation direction.

  The magnet 37 is a permanent magnet fixed to one end of the rack 36. The magnetic field of the magnet 37 that moves as the rack 36 moves acts on the power generation coil 430.

  The power generation coil 430 is disposed so as to surround one end of the rack 36. A magnet 37 fixed to the rack 36 moves inside the power generation coil 430 and moves toward and away from the power generation coil 430, so that a current flows through the power generation coil 430 by electromagnetic induction.

  The power generation coil 430 of this embodiment includes a first power generation coil 431 and a second power generation coil 432. The first power generation coil 431 is an inner coil positioned on the inner side, and the second power generation coil 432 is an outer coil positioned on the outer side of the first power generation coil 431. The second power generation coil 432 is configured to increase the number of turns at the end portion on the side away from the rack 36.

  The current of the first power generation coil 431 is input to the output polarity determination circuit 451 through the first cable 435, and the current of the second power generation coil 432 is input to the output polarity determination circuit 451 through the second cable 436.

  One end of the return spring 39 is fixed to the end opposite to the side to which the magnet 37 of the rack 36 is fixed, and the other end is fixed to the inside of the main body 6. When the rack 36 moves in a direction approaching the power generating coil 38, a force for returning the rack 36 to the original position is applied by the return spring 39.

  The drag unit 50 includes a magnetic fluid tank 52 and a drag coil 53 disposed on the peripheral surface of the magnetic fluid tank 52.

  The magnetic fluid tank 52 is a container filled with a magnetorheological fluid 51 whose viscosity is changed by a magnetic field. In the magnetic fluid tank 52, an end portion on the opposite side to the side to which the arm portion 16 of the rotating shaft 15 is connected is inserted. A stirring fin 19 is provided at the end of the rotating shaft 15 on the side inserted into the magnetic fluid tank 52. Accordingly, the stirring fin 19 receives a resistance corresponding to the viscosity of the magnetorheological fluid 51 as the rotating shaft 15 rotates.

  The drag coil 53 is wound around the outer peripheral surface or inside of the magnetic fluid tank 52 so as to surround the magnetorheological fluid 51. The drag coil 53 is electrically connected to the power generation coil 430 via an output polarity determination circuit 451 and an output adjustment circuit 452.

  The output polarity determination circuit 451 acquires the polarity of the voltage flowing through the first power generation coil 431 and the second power generation coil 432. The polarity of the voltage flowing through the first power generation coil 431 and the second power generation coil 432 by electromagnetic induction is determined by the moving direction of the magnet 37. Since the moving direction of the magnet 37 is determined by the rotating direction of the rotating shaft 15, the rotating direction of the rotating shaft 15, that is, the rotating direction of the door 1 can be determined by the polarity of the voltage.

  The output adjustment circuit 452 adjusts the output of the current sent to the drag coil 53 based on the rotation direction of the door 1 based on the polarity information input from the output polarity determination circuit 451.

  In the present embodiment, the output of current is adjusted using the difference in the number of turns of the first power generation coil 431 and the second power generation coil 432. For example, when the door 1 is opened, the current of the first power generation coil 431 having a small number of turns is supplied to the drag coil 53 so that the drag applied by the stirring fin 19 by the magnetorheological fluid 51 is reduced. Switch the current path. When the door 1 is closed, for example, when it is desired to increase the drag applied to the rotary shaft 15, the current path is switched so that the current of the second power generation coil 432 is sent to the drag coil 53.

  In the present embodiment, more current flows when the magnet 37 is positioned in a portion with a large number of turns while the current path is switched to the second power generation coil 432. In other words, by strongly applying a magnetic field at a specific position, the viscosity of the magnetorheological fluid 51 can be increased to exert a strong drag on the rotating shaft 15.

According to the door closer 5 as the damper device of the present embodiment described above, the following effects are obtained.
That is, the door closer 5 has a rotating shaft 15 that rotates in conjunction with the movement of the door 1 as a moving body, and is linked to the rotating shaft 15 from one side to the other side or the other side depending on the direction of rotation of the rotating shaft 15. A magnet 37 that moves from one side to the other, a power generation coil 430 that generates power by electromagnetic induction as the magnet 37 moves, and a property that the viscosity changes according to the magnetic field. Magnetorheological fluid 51 that imparts resistance according to viscosity against rotation, drag coil 53 that causes a magnetic field to act on magnetorheological fluid 51 by energization, and power generating coil 430 for drag based on the moving direction of magnet 37 And an output adjustment circuit 452 for adjusting a current sent to the coil 53.

Thereby, since the current sent to the drag coil 53 is automatically adjusted according to the moving direction and position of the door 1, the change in the viscosity of the magnetorheological fluid 51 is used to respond to the moving direction of the door 1. A damping force can be applied. For example, when the door 1 is opened, the drag applied to the stirring fin 19 of the rotary shaft 15 is reduced, and when the door 1 is closed, the drag can be automatically increased.

  Further, the output adjustment circuit 452 of the above embodiment determines the moving direction of the magnet 37 based on the polarity of the voltage generated by the power generating coil 430, and outputs the current output sent to the drag coil 53 based on the moving direction. adjust.

  Thereby, since the movement direction of the magnet 37 with respect to the power generation coil 430 can be known without providing a sensor for detecting the movement direction of the magnet 37, a circuit for energizing the drag coil 53 in accordance with the movement direction of the door 1 is provided. It can be designed simply.

  In addition, the power generation coil 430 of the above embodiment includes a first power generation coil 431 and a second power generation coil 432 having a larger number of turns than the first power generation coil, and the output adjustment circuit 452 includes the power generation coil 430. When the resistance applied to the rotating shaft 15 is relatively weak based on the voltage polarity of the current, the current generated by the first power generation coil 431 is sent to the drag coil 53, and when the resistance is relatively strong, the second power generation is performed. The path for sending the current is switched so that the current generated by the coil 432 is sent to the drag coil 53.

  Thus, by using the first power generation coil 431 and the second power generation coil 432 having different power generation amounts, an appropriate resistance corresponding to the moving direction of the door 1 is applied to the magnetorheological fluid 51 only by switching the current path. A configuration that can be applied to the rotating shaft 15 can be realized without adding complicated control.

  In addition, the second power generation coil 432 of the power generation coil 430 of the above-described embodiment is configured such that the number of turns of some coils is larger than the number of turns of other parts.

  Thereby, a drag can be made to act strongly in the predetermined position of the rotation range of the door 1. The number of turns of the drag coil 53 may be greater than the number of turns of the other parts.

  Further, by applying the door closer 5 as the damper device of the present embodiment to the fitting 4, even when the unintentional rotation of the door 1 occurs such as a wind storm, the damping force depends on the rotation direction of the door 1. It can work properly.

  Next, similarly to the first embodiment, second to fourth embodiments in which the present invention is applied to a door closer will be sequentially described. In the following description of each embodiment, the same reference numerals may be given to the same configurations already described, and the description thereof may be omitted.

Second Embodiment
FIG. 3 is a diagram schematically showing the configuration of the door closer 5a of the second embodiment. As shown in FIG. 3, the door closer 5 a of the second embodiment is different from the door closer of the above embodiment in the configuration of the power generation unit 55 and the drag unit 530.

  The power generation coil 38 included in the power generation unit 55 of the second embodiment is disposed so as to surround one end of the rack 36. The magnet 37 fixed to the rack 36 moves inside the power generation coil 38 and moves toward and away from the power generation coil 38, so that a current flows through the power generation coil 38. The first embodiment differs from the first embodiment in that the power generation coil 38 has one system.

  The drag coil 550 of the second embodiment includes a first drag coil 551 and a second drag coil 552. The first drag coil 551 has a smaller number of turns than the second drag coil 552, and the second drag coil 552 is disposed inside the first drag coil 551.

  Further, the door closer 5a of the second embodiment includes an output adjustment circuit 553 having a polarity determination function and a path switching function. The output adjustment circuit 553 determines the rotation direction of the door 1 according to the voltage characteristics of the power generation coil 38 input via the cable 554.

  The output adjustment circuit 553 is connected to the first drag coil 551 through the cable 556 and is also connected to the second drag coil 552 through the cable 555. The output adjustment circuit 553 switches the path so that a current flows through either the first drag coil 551 or the second drag coil 552 based on the rotation direction of the door 1.

  The drag coil 550 of the second embodiment includes a first drag coil 551 and a second drag coil 552 having a larger number of turns than the first drag coil 551, and the output adjustment circuit 553 includes the power generation coil 38. When the resistance applied to the rotary shaft 15 is relatively weak based on the voltage polarity (the rotation direction of the door 1), the current generated by the power generation coil 38 is sent to the first drag coil 551, In the case of increasing the strength, the path for sending the current is switched so that the current generated by the power generation coil 38 is sent to the second drag coil 552.

  Thus, by using the first drag coil 551 and the second drag coil 552 having different magnetic field amounts to be applied to the magnetorheological fluid 51, the direction of movement of the door 1 to the magnetorheological fluid 51 can be simply switched. And the appropriate resistance according to a position can be provided to the rotating shaft 15.

  In the second embodiment, of the first drag coil 551 and the second drag coil 552 constituting the drag coil 550, the number of turns of the second drag coil 552 (part) is the first drag coil 551 (others). The number of turns is configured more than the number of turns. Thereby, when it can be determined that the door 1 moves in the closing direction, a current is passed through the second drag coil 552 having a large number of turns so that the drag is increased, the magnetic field is increased to increase the viscosity, and the door 1 is opened. When moving to, current can be passed through the first drag coil 551 so that the drag becomes relatively small.

<Third Embodiment>
FIG. 4 is a diagram schematically showing the configuration of the door closer 5b of the third embodiment. As shown in FIG. 4, the door closer 5 b includes a GMR sensor 350, a GMR determination circuit 351, and an output adjustment circuit 352. In addition, the structure of the electric power generation part 55 is the same structure as 2nd Embodiment, and the structure of the drag part 50 is the same structure as 1st Embodiment.

  The GMR sensor 350 is a magnetic detection unit that is disposed inside the main body 6 and detects the magnetism of the magnet 37 fixed to the rack 36. A detection signal of the GMR sensor 350 is transmitted to the GMR determination circuit 351. In addition to the GMR sensor 350, a Hall element can be used as the magnetic detection unit.

  The GMR determination circuit 351 acquires the moving direction, moving speed, and position of the magnet 37 by acquiring detected magnetism that changes according to the distance between the magnet 37 and the GMR sensor 350.

  By detecting the moving direction of the magnet 37, the opening / closing direction of the door 1 can be determined. Depending on the moving speed of the magnet 37, the rotating speed of the rotating shaft 15, that is, the rotating speed of the door 1 can be reflected in the output current. Further, the position of the door 1 can be acquired based on the position of the magnet 37, and by combining with the moving direction, it can also be acquired whether the door 1 is in the position at the beginning of opening or the position at the beginning of closing. Moreover, it also has a function of detecting deterioration of the mechanism of the power generation unit 55 such as the magnet 37, the rack 36, and the pinion 35.

  The output adjustment circuit 352 performs output adjustment based on the movement speed (the rotation speed of the door 1), the movement direction, and the position detected by the GMR determination circuit 351. In the present embodiment, the drag is adjusted according to the rotation speed of the rotation shaft 15. Further, the output of the door 1 is corrected according to the position.

According to the door closer 5b of this embodiment described above, the following effects are obtained.
The door closer 5b acquires a moving speed based on the GMR sensor 350 that detects magnetism and the detected magnetism of the GMR sensor 350, determines the moving direction, and drags based on the moving information (moving speed, moving direction, position, etc.). And an output adjustment circuit 352 for adjusting the output of the current flowing through the coil 53.

  As a result, a drag force caused by the magnetorheological fluid 51 is applied to the rotating shaft 15 according to the rotational speed of the door 1. Further, an appropriate drag force can be adjusted according to the position of the door 1. For example, the current output is set according to the rotation speed of the door 1, the current output is increased so that the drag acts relatively strongly when the door 1 is closed, and the drag works relatively weak when the door 1 is opened. You can also adjust the output. In addition, even when the temperature change affects the viscosity of the magnetorheological fluid 51, the drag is adjusted according to the rotation speed, so that the fluctuation of the drag due to the temperature environment can be effectively suppressed. Furthermore, in order to detect the deterioration of the mechanism of the power generation unit 55 such as the magnet 37, the rack 36, and the pinion 35, and to reflect the influence of the deterioration on the output adjustment, the damping force is reduced due to various disturbance factors such as the deterioration of the power generation unit 55. Supplementary programs can also be incorporated.

<Fourth embodiment>
FIG. 5 is a diagram schematically showing the configuration of the door closer 5c of the fourth embodiment. As shown in FIG. 5, the door closer 5 c of the fourth embodiment includes a temperature sensor 250, a temperature correction circuit 251, and an output adjustment circuit 252.

  The temperature sensor 250 is disposed inside the main body 6 and is a temperature detection unit that detects the temperature inside the main body 6. A detection signal of the temperature sensor 250 is transmitted to the temperature correction circuit 251.

  The temperature correction circuit 251 sets a correction value for performing output adjustment based on the temperature detected by the temperature sensor 250. For example, the temperature correction circuit 251 stores the relationship between the temperature and the temperature based on the viscosity-temperature characteristics of the magnetorheological fluid 51 in a table format, and the temperature correction circuit 251 is based on the detection signal of the temperature sensor 250. The correction value is set, and a correction signal based on the correction value is transmitted to the output adjustment circuit 252.

  The output adjustment circuit 252 is arranged in an electrical path connecting the power generation coil 38 and the drag coil 53, adjusts the output of the current sent from the power generation coil 38, and sends it to the drag coil 53. The output adjustment circuit 252 reflects the correction signal set by the temperature correction circuit 251 based on the detection signal of the temperature sensor 250 and adjusts the output of current. The output adjustment circuit 252 of the present embodiment has a function of determining the polarity based on the voltage polarity of the power generation coil 38, and can adjust the output of current based on this polarity. This output is corrected by the detected temperature.

According to the door closer 5c of the present embodiment described above, the following effects can be obtained.
The door closer 5c further includes a temperature sensor 250 that detects the temperature, and an output adjustment circuit 252 that adjusts the output of the current flowing in the drag coil 53 based on the temperature characteristics of the temperature detected by the temperature sensor 250 and the viscosity of the magnetic fluid. Prepare.

  Thereby, the environmental temperature is detected by the temperature sensor 250, and a decrease in the damping force due to the environmental temperature of the viscosity of the magnetorheological fluid 51 can be compensated by a program that takes into account the influence of the environmental temperature. The damper function can be stably exhibited even in a place where the temperature change is large.

  In addition, in 4th Embodiment, although it was set as the structure which utilizes the temperature sensor 250 as a temperature detection part, it is not limited to this structure. For example, it can also be set as the structure which utilizes a Seebeck element as a temperature detection part.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and can be modified as appropriate.

  In the above-described embodiment, the example in which the present invention is applied to the door closer has been described. However, the door closer 11 may be incorporated into the door closer.

  Next, a fifth embodiment in which the present invention is applied to a hinge will be described. FIG. 6 is a diagram schematically illustrating the configuration of the hinge 610 of the fifth embodiment. As shown in FIG. 6, the hinge 610 of the fifth embodiment includes an upper hinge 620, a lower hinge 640, and a receiving ring 30 disposed between the upper hinge 620 and the lower hinge 640. .

  The upper hinge 620 includes an upper plate 21 and an upper shaft body 622. The upper shaft body 622 is provided with a power generation unit 645 and a drag unit 660 described later.

  The lower hinge 40 includes a lower plate 41 and a lower shaft body 642. A rotating shaft 625 is fixed to the upper part of the lower shaft body 642 of the lower hinge 640, and the tip of the rotating shaft 625 is inserted into the magnetic fluid tank 665. A stirring fin 626 as a resistance portion is formed at the tip of the rotating shaft 625. When the rotating shaft 625 rotates, the stirring fin 626 receives a resistance corresponding to the viscosity of the magnetorheological fluid 664, and this resistance force becomes a drag force that controls the rotation speed of the door 1.

  The drag unit 660 includes a magnetic fluid tank 665 filled with the magnetorheological fluid 664 and a drag coil 670 wound around the outer periphery of the magnetic fluid tank 665.

  The power generation unit 645 includes a case 681, a magnet 682 fixed to the peripheral surface of the rotation shaft 625, and a power generation coil 671 disposed around the magnet 682 as main components.

  The receiving ring 30 is disposed between the lower end surface of the upper shaft body 622 and the upper end surface of the lower shaft body 642. The rotating shaft 625 is connected to the drag portion 660 through the through hole 31 at the center of the receiving ring 30. Since the lower hinge 640 receives the weight of the upper hinge 620 through the receiving ring 30, the rotation shaft 625 is hardly affected by the weight of the upper hinge 20.

  A detailed configuration of the power generation unit 645 will be described. FIG. 7 is an exploded perspective view of the power generation unit 645 of the fifth embodiment. As shown in FIG. 7, the case 681 includes an upper case 685 and a lower case 695. The upper case 685 has a through hole at its center, and four upper claw portions 686 are formed at equal intervals in the circumferential direction around the through hole. The lower case 695 has a through hole at the center thereof, and a lower claw portion 696 corresponding to the upper claw portion 686 is provided around the through hole.

  The power generation coil 671 is housed inside the case 681 while being wound around the bobbin 684. Therefore, the power generation coil 671 is sandwiched between the upper case 685 and the lower case 695 together with the bobbin 684.

  FIG. 8 is a plan view of the power generation unit 645 of the fifth embodiment. As shown in FIG. 8, the magnet 682 is composed of permanent magnets that are alternately arranged in the order of the N pole, the S pole, and the N pole in the circumferential direction. The magnet 682 is held inside the case 681 so that the power generation coil 671 is positioned around the magnet 682.

  The magnet 682 rotates integrally with the rotating shaft 625, and a current due to a change in the magnetic field is generated in the power generation coil 671. The current generated in the power generation coil 671 is sent to the drag coil 670 disposed on the outer periphery of the magnetic fluid tank 665 through the cable 675.

  The cable 675 is provided with an output adjustment unit 690 serving as an output adjustment unit that performs output adjustment.

  The output adjustment unit 690 is an electronic component that acquires the rotation direction of the magnet 682 and adjusts the output of the current sent to the drag coil 670 based on the rotation direction. Note that the rotation direction of the magnet 682 may be acquired using, for example, the voltage (polarity) of the power generation coil 671, or may be acquired from the detection signal by arranging a Hall element as a magnetic detection unit. It is good.

  When the drag coil 670 is energized, a magnetic field is generated, the viscosity of the magnetorheological fluid 664 increases, and the resistance force that the stirring fin 626 receives in the magnetic fluid tank 665 changes. Also in the configuration of the fifth embodiment, the rotation speed of the door 1 can be appropriately controlled by the viscosity according to the rotation speed and the rotation direction of the door 1.

  In the above-described embodiment, the door is described as an example of the moving body. However, various dampers that control the moving speed of the moving body, such as a hinge of a window that rotates within a predetermined range and a rotation mechanism of a bar for preventing entry. The present invention can be applied to an apparatus.

1 Door (moving body, door)
4 Joinery 5,5a-c Door closer (damper device)
15,625 Rotating shaft 37,682 Magnet 38,430,671 Power generation coil 51,664 Magnetorheological fluid (magnetic fluid)
53,550,670 Coil for drag 250 Temperature sensor (temperature detector)
252, 352, 452, 553 Output adjustment circuit (output adjustment unit)
350 GMR sensor (magnetic detector)
610 Hinge (damper device)
690 Output adjustment unit (output adjustment unit)

Claims (7)

A damper device for controlling the moving speed of a moving body,
A rotating shaft that rotates in conjunction with the movement of the moving body;
In conjunction with the rotating shaft, a magnet that moves its position from one side to the other side or from the other side according to the direction of rotation of the rotating shaft;
A power generating coil that generates power by electromagnetic induction as the magnet moves;
A magnetic fluid having a property of changing viscosity according to a magnetic field, and providing a resistance corresponding to the viscosity with respect to rotation of the rotating shaft;
A drag coil for applying a magnetic field to the magnetic fluid by energization;
An output adjusting unit for adjusting a current sent from the power generating coil to the drag coil based on a moving direction of the magnet;
A damper device comprising:   The damper device according to claim 1, wherein a moving direction of the magnet is determined based on a polarity of a voltage generated by the power generating coil, and a current output sent to the drag coil is adjusted based on the moving direction. A magnetic detection unit for detecting magnetism;
2. The damper device according to claim 1, wherein a moving direction of the magnet is determined based on magnetism detected by the magnetic detection unit, and a current sent from the power generating coil to the drag coil is adjusted based on the moving direction.   4. The damper device according to claim 3, wherein a moving speed of the magnet is acquired from magnetism detected by the magnetic detection unit, and an output of a current flowing through the drag coil is adjusted based on the moving speed. A temperature detection unit for detecting the temperature;
The damper device according to claim 1 or 2 , wherein an output of a current sent to the drag coil is adjusted based on a temperature detected by the temperature detection unit.   6. The damper device according to claim 1, wherein the number of turns of a part of the drag coil or the part of the power generation coil is larger than the number of turns of the other part. A door provided with a door attached to an opening of a building and a damper device for controlling a moving speed of the door,
The damper device is
A rotating shaft that rotates in conjunction with the movement of the door;
In conjunction with the rotating shaft, a magnet that moves its position from one side to the other side or from the other side according to the direction of rotation of the rotating shaft;
A power generating coil that generates power by electromagnetic induction as the magnet moves;
A magnetic fluid having a property of changing viscosity according to a magnetic field, and providing a resistance corresponding to the viscosity with respect to rotation of the rotating shaft;
A drag coil for applying a magnetic field to the magnetic fluid by energization;
An output adjusting unit for adjusting a current sent from the power generating coil to the drag coil based on a moving direction of the magnet;
Joinery with.

Images