JP2020029671A - Automatic refueling system for electric shutter device - Google Patents

Abstract

To realize a system capable of appropriately refueling an electric shutter device while reducing the labor required for refueling the electric shutter device.SOLUTION: An automatic refueling system 10 includes: an oil extending part 40 attached to a shutter 12 of an electric shutter device 1 and facing inner surfaces of guide rails 30 and 31 on both right and left sides for being in contact therewith; a refueling device 50 for supplying oil to a contact part between the inner surface of the guide rail 30 and the oil extending part 40; and a control device 70. The control device 70 controls the refueling by the refueling device 50 in such a manner that when the number of measurement times of shutter elevation/descent reaches a predetermined number of times or when the measurement time from an initial time point reaches a predetermined time, whichever comes earlier, the refueling device 50 is caused to refuel, thereby causing the oil extending part 40, during operation of the shutter, to extend the oil in the vertical direction of the inner surface of the guide rail 30.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an automatic lubrication system for an electric shutter device, and more particularly to a system for appropriately refueling an electric shutter device while reducing the labor required for refueling the electric shutter device.

  Conventionally, as disclosed in Patent Document 1, a shutter that moves up and down by opening and closing an opening by driving a switch (electric switch) according to a user's operation, and a pair of guides that guide left and right side edges of the shutter. An electric shutter device including a rail is known. In such an electric shutter device, a worker performing maintenance and inspection performs an operation of supplying lubricating oil to a contact portion between both side edges of the shutter and the guide rail at a predetermined timing.

  Further, in Patent Document 1, an operation switch and a remote operation unit are provided as operating tools for instructing opening and closing of a shutter, and a counting device counts the number of times the shutter is opened and closed based on an operation signal input from each operating tool. are doing. Then, when the count number of the shutter exceeds a predetermined number, the display unit is blinked to notify the user. Therefore, by checking the blinking of the worker, it can be determined that refueling is necessary, and the refueling operation can be performed.

JP 2008-231815 A

  In the electric shutter device, if the number of times of opening and closing of the shutter from the time of refueling increases, the oil becomes insufficient, the contact resistance between the left and right side edges of the shutter and the guide rail increases, the noise increases, and the opening and closing operation becomes unstable. become. In addition, when the contact resistance is increased, the load on the electric switch becomes excessive, and the life of the electric switch is shortened. For this reason, when the number of times of opening and closing of the shutter increases, it is desired to advance the timing of refueling.

  On the other hand, in the case of the configuration described in Patent Literature 1, the operator can check the flickering of the display means to determine the required time for refueling according to the number of times the shutter is opened and closed. However, even in such a case, it is troublesome for the operator to check the display means of the shutter and to refuel when confirming the blinking. Further, even if the number of times of opening and closing of the shutter is small, the contact resistance between the shutter and the guide rail increases due to deterioration of the oil over a long period of time, so that oil supply may be required.

  An object of the present disclosure is to realize a system that can appropriately lubricate the electric shutter device while eliminating the labor required for refueling the electric shutter device.

  The automatic refueling system of the electric shutter device according to the present invention includes a shutter that moves up and down by opening and closing an opening by driving an electric switch in accordance with a user's operation, and is disposed to face both side edges in the left-right direction of the shutter. An automatic lubrication system for an electric shutter device, comprising: two guide rails for guiding up and down movement of the shutter. An automatic lubrication system is attached to the shutter, an oil stretcher that is opposed to and contacts the inner surface of the guide rail, and a lubricating device that lubricates a contact portion between the inner surface of the guide rail and the oil stretcher, A control device for controlling refueling by the refueling device. The control device has a count measuring unit that measures the number of times the shutter is moved up and down, and a timer that measures an elapsed time from an initial time, when the number of measurements of the number counting unit reaches a predetermined number, or When the measurement time of the timer reaches a predetermined time, whichever is earlier, the refueling is performed by the refueling device, and at the time of the operation of the shutter, by the oil extending unit, the inner surface of the guide rail is vertically moved. Spread the oil.

  According to the automatic refueling system of the electric shutter device according to the present invention, at an appropriate time from the number of times of elevating and lowering the shutter and the elapsed time from the initial point, the refueling by the refueling device and the elevating operation of the shutter automatically control the shutter and the guide. A wide part between the rails can be refueled. Increasing the number of times of elevating and descending and the elapsed time lead to a shortage of oil between the shutter and the guide rail or deterioration of the oil. Therefore, oil can be appropriately supplied by refueling according to these. This makes it possible to appropriately refuel the electric shutter device while eliminating the labor required for refueling the electric shutter device.

  In the automatic refueling system for the electric shutter device according to the present invention, preferably, the electric switch is disposed above the opening, and includes a winding unit that opens the opening by winding the shutter. The oil stretcher is attached to a lower end of the shutter.

  According to the above preferred configuration, the oil spreading portion is provided at the lower end portion of the shutter. Therefore, during operation of the shutter, the oil spreading portion moves while facing a wide range in the vertical direction on the inner side surface of the guide rail, so that the vertical direction of the electric shutter device is increased. Oil can be supplied in all directions.

  In the automatic refueling system of the electric shutter device according to the present invention, preferably, the guide rail includes two wall portions facing both side surfaces of the edge portion of the shutter in the front and back directions, and an end wall connecting the two wall portions. And the oil stretcher has three brush portions facing the two wall portions and the end wall portion, respectively, and the oil supply device is provided with the two wall portions and the end wall portion. Oil is supplied to a contact portion between the side surface and the tips of the three brush portions.

  According to the above preferred configuration, oil can be supplied to the three wall portions of the guide rail, so that the contact resistance between the shutter and the guide rail can be further reduced.

  In the automatic refueling system of the electric shutter device according to the present invention, preferably, the automatic shutter system includes a speed detection unit that detects the vertical speed of the shutter, the control device, when the detected value of the vertical speed is less than a predetermined speed Then, refueling is performed by the refueling device.

  According to the above-described preferred configuration, it can be determined that the amount of oil between the shutter and the guide rail is insufficient and the contact resistance is increased when the elevating speed of the shutter is equal to or lower than the predetermined speed. Thereby, refueling can be performed at a more appropriate time by performing refueling.

  ADVANTAGE OF THE INVENTION According to the automatic lubrication system of the electric shutter apparatus which concerns on this invention, lubrication to an electric shutter apparatus can be carried out appropriately, eliminating the labor of an operator required for lubrication to an electric shutter apparatus.

1 is a perspective view of an electric shutter device including an automatic refueling system according to an embodiment of the present invention. FIG. 2 is an enlarged perspective view of a portion A in FIG. 1. It is BB sectional drawing of FIG. FIG. 4 is a perspective view showing the lowermost end of the shutter, a guide rail, and an oil discharge nozzle in a state where the shutter is raised most. FIG. 4B is a diagram showing a state in which oil is supplied to a contact portion between the inner surface of the end wall portion of the guide rail and the oil extending portion in FIG. 4A. It is a lineblock diagram of a control device of an automatic refueling system. It is a flowchart which shows the method of controlling refueling of a refueling apparatus. FIG. 4B shows a state in which oil is supplied from an oil discharge nozzle connected to an oil supply device of an automatic oil supply system in another example of the embodiment according to the present invention to a contact portion between an inner surface of a guide rail and an oil extending portion. It is a corresponding figure.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The shapes, materials, numbers, and the like described below are examples for explanation, and can be appropriately changed according to the specifications of the electric shutter device 1 including the automatic refueling system 10. Hereinafter, the same elements will be denoted by the same reference numerals in all drawings. Further, in the description in the text, the symbols described earlier are used as necessary.

  FIG. 1 is a perspective view of an electric shutter device 1 including an automatic refueling system 10 according to the embodiment. FIG. 2 is an enlarged perspective view of a portion A in FIG. FIG. 3 is a sectional view taken along line BB of FIG. FIG. 4A is a perspective view showing the lowermost end of the shutter 12, the guide rail 30, and the oil discharge nozzle 56 in a state where the shutter 12 is raised most.

  The electric shutter device 1 opens and closes the opening 2 by moving up and down the shutter 12 by driving the electric switch 18 according to the operation of the operation unit 80 by the user. The electric switch 18 includes a winding unit 19 described below and a motor 21 connected to the winding unit 19. The opening 2 is, for example, an entrance through which a person passes. FIG. 1 illustrates a state where the shutter 12 is viewed from the back side to the front side when viewed from the inside to the outside of the building. 1 to 4A and FIGS. 4B and 6 described later, the horizontal direction when the shutter 12 is viewed from the back side is indicated by X, the front and back direction is indicated by Y, and the vertical direction orthogonal to X and Y is indicated by Z. Is shown.

  In the shutter 12, a plurality of slats 14 and 15 made of a metal plate such as a steel plate are connected to each other at ends in a vertical direction so as to be bendable. Specifically, as shown in FIG. 2, locking portions 16 are formed at both ends or one end in the vertical direction Z of each slat 14, 15, and two adjacent slats 14, 15 are The respective locking portions 16 are connected to each other so as to be bent.

  A rectangular parallelepiped case 17 is fixed to a building structure (not shown) above the opening 2 so as to extend in the left-right direction X. Inside the case 17, a column-shaped winding portion 19 is rotatably supported about an axis extending in the left-right direction X, and is provided at one end in the axial direction of the winding portion 19 (the right end in FIG. 1). Is connected to the motor 21. As a result, when the motor 21 is driven, the winding unit 19 rotates.

  In the shutter 12, the lowermost slat 15 has a smaller X length in the left-right direction than the other slats 14, and oil spreading portions 40, 41 described later are fixed to both side edges of the slat 15 in the left-right direction X. In FIG. 1, the oil spreading portions 40 and 41 are shown by oblique lattice portions. Each oil spreading part 40, 41 has three brush parts 43, 44, 45 (FIG. 2), and the tip (the left end in FIG. 2) of the brush part 43 is located at the same position as the X edge of the slat 14 in the left-right direction. Or protrudes slightly outward from the X-edge in the left-right direction of the slat 14.

  The operation unit 80 is fixed near the shutter 12 on a wall surface of a building (not shown). Buttons B1, B2, and B3 for instructing ascending, stopping, and descending, respectively, are arranged on the operation unit 80. When the user operates any of the buttons B1, B2, and B3, a command signal based on the operation is transmitted from the operation unit 80 to the control device 70 as a wired signal. The control device 70 controls the motor 21 according to the command signal. The operation unit may be a remote control device that can be carried by the user.

  The upper end of the shutter 12 is fixed to the winding unit 19. When the shutter 12 is wound by rotation of the winding unit 19 in one direction, the shutter 12 is raised, and the opening 2 is opened.

  On the other hand, when the shutter 12 is rewound by the rotation of the winding unit 19 in the other direction, the shutter 12 is lowered and the opening 2 is closed.

  The electric shutter device 1 is provided with a limit switch 82 that detects that the shutter 12 has been wound up to a position where the opening 2 is fully opened (fully opened position). When the full opening by the limit switch 82 is detected, the control device 70 stops the motor 21 and updates the stored number of times of lifting by the number counting unit 72 (FIG. 5) described later.

  Two guide rails 30 and 31 are arranged to face both side edges of the shutter 12 in the left-right direction X. As shown by the left guide rail 30 in FIG. 2, each of the guide rails 30 and 31 includes two wall portions 32 and 33 facing two sides of the front and back direction Y of the left and right direction X edge portion of the shutter 12 and two And an end wall portion 35 for connecting the wall portions 32 and 33 to each other. Each of the wall portions 32 and 33 has a substantially U-shaped cross section on a horizontal plane that opens toward the shutter 12. Side edges of the shutter 12 in the left-right direction X are disposed on the inner sides of the two guide rails 30 and 31, respectively, and guide the ascending and descending movement of the shutter 12 in the up-down direction Z. Each guide rail 30, 31 is made of a metal plate such as a stainless alloy.

  The automatic refueling system 10 is used for automatically refueling each of the two guide rails 30 and 31. To this end, the automatic refueling system 10 includes two oil spreading units 40 and 41, a refueling device 50, a speed detecting unit 84, and a control device 70 for controlling refueling by the refueling device 50.

  The two oil spreading portions 40 and 41 fixed to the left and right side edges of the slat 15 at the lowermost end of the shutter 12 have the same structure except that only the mounting position and the direction are different. The oil stretcher 40 on the left side will be described with reference to FIG. The oil spreading portion 40 includes a rectangular parallelepiped block-shaped base portion 42, a front end surface F1 (FIG. 3) of the base portion 42, and two parallel side surfaces F2 and F3 (FIG. 3) adjacent to the front end surface F1. Each has three brush portions 43, 44, and 45 protruding in a rectangular parallelepiped shape.

  The base portion 42 is formed of, for example, a resin. The brush portions 43, 44, and 45 are formed by, for example, a plurality of resin hairs such as silicone resin extending in parallel and densely packed in a rectangular parallelepiped shape. The oil stretcher 40 may be detachably attached to the X edge of the slat 15 in the left-right direction by fastening means including a bolt and a nut.

  The tip of the brush part 43 faces and contacts the inner surface of the end wall part 35 of the guide rail 30. The tips of the two brushes 44 and 45 are opposed to and contact the inner surfaces of the two walls 32 and 33 of the guide rail 30, respectively. When the shutter 12 moves up and down, the brushes 43, 44, and 45 move while contacting the end wall 35 and the inner surfaces of the walls 32, 33. As a result, the brush portions 43, 44, 45 extend the oil supplied to the contact portions between the brush portions 43, 44, 45 and the guide rails 30 to a wide area over the entire area in the vertical direction Z, as described later. Can be.

  The oil supply device 50 supplies oil to contact portions between the inner side surfaces of the guide rails 30 and 31 and the oil extending portions 40 and 41. Specifically, the oil supply device 50 includes an oil tank 51 and a pump 52 fixed to the upper surface of the case 17, respectively, and an oil discharge nozzle 56.

  The suction port of the pump 52 is connected to the oil tank 51, and when the pump 52 is driven, the oil from the oil tank 51 is sucked and discharged from the discharge port. An oil discharge nozzle 56 on the left side is connected to this discharge port via a solenoid valve 55. A connection pipe 58 communicating with an upstream end of a right oil discharge nozzle (not shown) is connected to an intermediate portion of the left oil discharge nozzle 56. The left oil discharge nozzle 56 supplies oil to the upper inside of the left guide rail 30, and the right oil discharge nozzle supplies oil to the upper inside of the right guide rail 31. The pump 52 and the solenoid valve 55 are driven by a command signal from the control device 70. FIG. 1 shows the oil discharge nozzle 56 in a simplified manner.

  As shown in FIG. 4A, the oil discharge nozzle 56 branches three branch-shaped nozzle elements 57a, 57b, and 57c at the lower end. The three nozzle elements 57a, 57b, and 57c have their respective tip openings directed toward the inner surfaces of the walls 32, 33 and the end wall 35 inside the upper end of the guide rail 30. Each of the nozzles is moved toward a contact portion between each brush portion 43, 44, 45 of the oil extending portion 40 attached to the lowermost end portion of the shutter 12 and the inner surface of the guide rail 30 with the shutter 12 raised most. Oil can be discharged from the tip openings of the elements 57c, 57a, 57b. For example, as shown in FIG. 4B, in a state where the shutter 12 is at the highest position, a contact portion G between the brush portion 43 protruding from the front end face F <b> 1 of the oil extending portion 40 and the inner surface of the end wall portion 35 of the guide rail 30. The oil is discharged from the nozzle element 57c toward the upper end of the nozzle element. As a result, the oil permeates into the tip of the brush portion 43 located at the contact portion G, so that when the shutter 12 subsequently moves down, the oil is extended downward. In particular, since the oil stretcher 40 is provided at the lower end of the shutter 12, the oil stretcher 40 moves while opposing a wide range in the vertical direction Z on the inner surface of the guide rail 30 when the shutter 12 operates. Thereby, it is possible to refuel the wide area over the entire vertical Z direction of the electric shutter device 1.

  The speed detecting unit 84 shown in FIG. 5 detects the elevating speed of the shutter 12 by detecting the rotation speed of the motor 21 or the like. The speed detection unit 84 includes, for example, a resolver that detects the rotation angle of the rotation shaft of the motor 21. The detection signal of the speed detection unit 84 is transmitted to a refueling control unit 75 (FIG. 5) included in the control device 70 described below. As will be described later, the detection value of the elevating speed of the shutter 12 is such that the contact resistance between the oil extending portions 40 and 41 attached to the shutter 12 and the guide rails 30 and 31 becomes insufficient due to insufficient oil. It is used to determine whether it has become larger. The speed detector 84 may include a resolver and a speed calculator that receives a detection signal from the resolver and calculates the rotation speed of the motor from the detection signal. At this time, the speed calculation unit is realized by a part of the function of the control device.

  The speed detection unit is not limited to the above example, and may use a sensor facing the shutter 12 to magnetically or optically detect the elevating speed of the shutter 12. For example, the speed detecting unit may be configured by a magnetic sensor that alternates the magnetic characteristics at equal intervals in the vertical direction at the left and right edges of the shutter and that faces the left and right edges of the shutter. At this time, the speed detection unit detects the change speed of the magnetic characteristics of the left and right edges of the shutter from the detection value of the magnetic sensor, and calculates the vertical movement speed of the shutter 12 from the detection result.

  In addition, a hole penetrating in the front and back direction is formed at equal intervals in the vertical direction of the left and right edges of the shutter 12, and a light emitting unit and a light receiving unit facing the position where the hole passes constitute a speed detecting unit. Is also good. At this time, the speed detecting unit measures a time interval when the light receiving unit receives the light from the light emitting unit, and calculates the elevating speed of the shutter 12 from the measurement result.

  The control device 70 drives the pump 52 and the electromagnetic valve 55 of the oil supply device 50 at an appropriate time to discharge oil from the tip openings of the oil discharge nozzles 56 on both the left and right sides. FIG. 5 is a configuration diagram of the control device 70. The control device 70 includes a motor control unit 71, a frequency counting unit 72, a timer 73, and a refueling control unit 75.

  The motor control unit 71 outputs a command signal for driving or stopping the motor 21 according to a command signal from the operation unit 80. When it is determined from the detection signal of the limit switch 82 that the shutter 12 has risen to the fully open position, the number-of-times measuring section 72 counts the number of times the shutter 12 has moved up and down and updates the number. The measured number of times of ascending and descending is output to the refueling control unit 75. The number of times of ascending and descending is measured from the start of the control device 70. The refueling device 50 is controlled by the refueling control unit 75 described later so that refueling is performed between the shutter 12 and the guide rails 30 and 31 when the number of times of ascending and descending reaches a predetermined number. An increase in the number of times of raising and lowering leads to a shortage of oil between the shutter 12 and the guide rails 30 and 31, and accordingly, by performing oiling accordingly, oiling can be performed appropriately. Control device 70 may reset the number of times of ascending and descending when refueling is performed, and start re-measurement of the number of times of ascending and descending from that point. Then, when the number of times of ascending and descending further reaches a predetermined number, refueling may be executed.

  The timer 73 measures an elapsed time from an initial time, specifically, a time when the control device 70 is activated, and outputs the measured time to the refueling control unit 75. Then, when the measurement time reaches a predetermined time earlier than the number of times of ascending and descending reaches the predetermined number, the refueling control unit 75 described later performs refueling between the shutter 12 and the guide rails 30 and 31. The refueling device 50 is controlled. Increasing the elapsed time leads to deterioration of the oil between the shutter 12 and the guide rails 30 and 31 and shortage of the oil. We can refuel properly. Control device 70 may reset the measurement time when refueling is executed, and start re-measurement of the elapsed time from that point. Then, when the measurement time further reaches the predetermined time, refueling may be executed. In the present embodiment, the elapsed time from the initial time when the electric shutter starts operating is used as the measurement time. However, considering the actual frequency of use of the shutter, this measurement time is determined by the opening and closing of the shutter. It is also possible to add up only the period during which the service is available.

  Refueling control unit 75, when the number of times of the number measurement unit 72 has reached a predetermined number, or when the time measured by the timer 73 has reached a predetermined time, whichever is earlier, at the time of the next operation of the shutter 12, The pump 52 and the solenoid valve 55 are controlled so that the oiling by the oiling device 50 is performed. The next operation of the shutter may be either ascending or descending. Whether the operation at the time of refueling is to be increased or decreased is set in advance by the control device 70. The oil supply control unit 75 causes a predetermined amount of oil to be discharged from the oil discharge nozzle 56 of the oil supply device 50 to the contact portions between the guide rails 30 and 31 and the brush portions of the oil extension units 40 and 41. The oil is, for example, a liquid lubricating oil or a semi-solid grease.

  The control device 70 allows the oil extending portions 40 and 41 to move in the vertical direction when the shutter 12 is operated after the refueling, whereby the oil is vertically moved on the inner side surfaces of the guide rails 30 and 31. Stretch. As a result, as described later, it is possible to appropriately refuel the electric shutter device 1 while eliminating the labor required for refueling the electric shutter device 1.

  Further, when the detected value of the vertical movement speed of the shutter 12 becomes equal to or less than the predetermined speed, the refueling control unit 75 causes the refueling device 50 to refuel at the next operation of the shutter 12. Thereby, as described later, the electric shutter device 1 can be refueled at a more appropriate time.

  FIG. 6 is a flowchart illustrating a method of controlling refueling of the refueling device 50. The process shown in FIG. 6 is executed by the refueling control unit 75 (FIG. 5). First, in step S11, it is determined whether or not the number of times of measurement of the elevating operation of the number-of-times measuring unit 72 (FIG. 5) has reached a predetermined number. The elevating operation is performed once when, for example, the shutter 12 descends and then rises. The order of descent and ascent in one elevating operation may be reversed. If the determination in step S11 is affirmative (YES), that is, if the number of measurements has reached the predetermined number, the process proceeds to step S14.

  On the other hand, if the determination in step S11 is negative (NO), the process proceeds to step S12. In step S12, it is determined whether the time measured by the timer 73 (FIG. 5) has reached a predetermined time. If the determination in step S12 is affirmative (YES), that is, if the measurement time has reached the predetermined time, the process proceeds to step S14.

  On the other hand, if the determination in step S12 is negative (NO), the process proceeds to step S13. In step S13, it is determined whether or not the detected value of the elevation speed of the speed detection unit 74 (FIG. 5) is equal to or lower than a predetermined speed. If the determination in step S13 is affirmative (YES), that is, if the elevating speed is equal to or lower than the predetermined speed, the process proceeds to step S14. On the other hand, if the determination in step S13 is negative (NO), the process ends, so the process returns to step S11 and the process is repeated.

  In step S14, it is determined that refueling is necessary. Therefore, when the shutter 12 is operated next time, for example, when the shutter 12 is next raised, the lubricating device is connected to the contact portions between the guide rails 30, 31 and the oil stretchers 40, 41. Refueling is performed by 50, and the processing in the refueling control unit 75 ends.

  Since oil is supplied to the contact portion in step S14, when the shutter 12 is operated, for example, when the shutter 12 is lowered, the oil is extended in the vertical direction on the inner side surfaces of the guide rails 30 and 31 by the oil extending portions 40 and 41.

  According to the automatic refueling system 10 of the electric shutter device 1, the refueling by the refueling device 50 and the raising and lowering operation of the shutter 12 are automatically performed at an appropriate time from the number of times the shutter 12 is raised and lowered and the elapsed time from the initial time. Oil can be supplied to a wide portion in the vertical direction between the shutter 12 and the guide rails 30 and 31. Increasing the number of times of elevating and lowering and the elapsed time leads to a shortage of oil or deterioration of oil between the shutter 12 and the guide rails 30 and 31, and accordingly, oil can be appropriately supplied by refueling. Thereby, it is possible to appropriately refuel the electric shutter device 1 while eliminating the labor and labor required for refueling the electric shutter device 1. For this reason, noise generated when the guide rail of the electric shutter device 1 and the shutter rub against each other due to insufficient refueling can be suppressed. Furthermore, it is possible to suppress the one-sided movement of the shutter 12 due to the difference in resistance between the contact portions between the right and left edges of the shutter 12 and the guide rails, and to prevent a failure due to an overload of the motor.

  Further, the oil spreading portions 40 and 41 have three brush portions 43, 44 and 45 facing the two wall portions 32 and 33 and the end wall portion 35, respectively. The oil supply device 50 supplies oil to contact portions between the inner surfaces of the two walls 32 and 33 and the end wall 35 and the tips of the three brushes 43, 44 and 45. Thereby, oil can be supplied to the two wall portions 32 and 33 and the end wall portion 35 of the guide rail, so that the contact resistance between the shutter 12 and the guide rail can be further reduced. The oil spreader has only a part of the three brushes 43, 44, and 45, and the lubricating device has a wall or an end wall that faces the part of the brushes. Oil may be supplied to a contact portion between the side surface and the tip of the brush portion.

  Further, the automatic refueling system 10 has a speed detecting unit 84 for detecting the vertical speed of the shutter 12, and the control device 70 controls the next shutter 12 when the detected value of the vertical speed of the shutter 12 becomes equal to or less than the predetermined speed. During the operation of, the refueling by the refueling device 50 is performed. As a result, it is possible to determine that the amount of oil between the oil stretchers 40 and 41 and the guide rails 30 and 31 is insufficient, and the contact resistance is increased, because the elevating speed of the shutter 12 is equal to or lower than the predetermined speed. For this reason, by performing refueling at the next operation of the shutter 12, refueling can be performed at a more appropriate time. Note that the speed detection unit may be omitted, and the control device may determine the timing of refueling the contact portion between the guide rail and the oil spreading unit based only on the number of times measured by the number counting unit and the time measured by the timer.

  Although the case where the oil supply device 50 includes the electromagnetic valve 55 has been described above, the electromagnetic valve is omitted when the oil is semi-solid such as grease, and the oil discharge nozzle is rotated by a predetermined number of rotations of the pump 52. A predetermined amount of oil may be discharged from 56.

  FIG. 7 shows a state in which oil is supplied from an oil discharge nozzle 56 connected to an oil supply device 50 (FIG. 1) of an automatic oil supply system according to another example of the embodiment to a contact portion between the inner side surface of the guide rail 30 and the oil stretcher 40. 4B is a diagram corresponding to FIG. 4B.

  In the case of the configuration of the present example, unlike the configuration shown in FIG. 4B, the shutter 12 of the inner surface of the end wall portion 35 of the guide rail 30 has been completely raised immediately before the shutter 12 is raised most. Sometimes, the oil is discharged from the nozzle element 57c of the oil discharge nozzle 56 toward the position where the brush portion 43 is to come into contact. At this time, the brush part 43 is at the position indicated by the solid line in FIG. Then, as shown by the two-dot chain line in FIG. 7, the shutter 12 is raised most as shown by the arrow α in FIG. 7, so that the brush portion 43 comes into contact with the portion of the end wall portion 35 where the oil is discharged. . Thereby, oil is supplied to the contact portion between the inner side surface of the end wall portion 35 and the brush portion 43. Thereafter, when the shutter 12 descends as shown by the arrow β in FIG. 7, the supplied oil is extended downward. FIG. 7 shows a case where oil is supplied to a contact portion between the brush portion 43 fixed to the front end surface F1 of the oil spreading portion 40 and the end wall portion 35. However, the side surfaces F2 and F3 of the oil spreading portion 40 shown in FIG. The same applies to the case of lubricating the contact portions between the brush portions 44 and 45 fixed to and the wall portions 32 and 33.

  In such a configuration, the oil is in a semi-solid state such as grease or the like, and the brush parts 43, 44 are merely discharged by discharging the oil above the contact part between the tip of the brush parts 43, 44, 45 and the guide rail 30. , 45, oil can be satisfactorily supplied to the contact portion between the brush portion and the guide rail. In this example, the other configurations and operations are the same as those in the configurations in FIGS.

  Although illustration is omitted, in each of the above examples, oil is supplied to a contact portion between the inner surface of the guide rail and the oil extending portion when the shutter 12 is lowered, and the oil is extended by moving the oil extending portion when the shutter 12 is raised. The oil may be spread over a wide range in the vertical direction on the inner surface of the rail.

  Further, in each of the above examples, in order to determine the oil supply timing according to the insufficient amount of oil at the contact portions between the guide rails 30 and 31 and the oil extending portions 40 and 41, the oil at the contact portions is determined. May be electrically detected. For example, the brush portion and the base portion of the oil spreading portion are formed of a conductive material, and an electric circuit is formed so that the guide rails 30, 31 and the brush portion and the base portion are electrically connected in series to a DC power supply. At this time, a current flowing in the electric circuit is detected by a current sensor. When an electrically insulating oil or an oil having a high degree of electrical insulation is supplied to a contact portion between the inner surfaces of the guide rails 30 and 31 and the oil extension portion, the electric resistance at the contact portion increases, so that the current sensor The detection value decreases. Thereafter, when the detection value of the current sensor decreases, it can be determined that the oil in the contact portion has decreased. Therefore, when the detection value of the current sensor becomes equal to or less than the predetermined value, the refueling by the refueling device 50 may be performed at the next operation of the shutter 12.

  In each of the above examples, the oil spreading portions 40 and 41 are attached to the lower ends of both side edges of the shutter 12 in the left-right direction. On the other hand, an oil stretcher can be attached to a portion other than the lower end of the shutter 12. In addition, it is also possible to attach an oil extending portion to only one of both side edges in the left-right direction of the shutter 12 and supply oil only to a contact portion between one of the guide rails and the oil extending portion.

  1 electric shutter device, 2 opening, 10 automatic refueling system, 12 shutter, 14, 15 slat, 17 case, 18 electric switch, 19 winding unit, 21 motor, 30, 31 guide rail, 32, 33 wall, 35 end wall portion, 40, 41 oil spreading portion, 42 base portion, 43, 44, 45 brush portion, 50 oil supply device, 51 oil tank, 52 pump, 55 solenoid valve, 56 oil discharge nozzle, 57a, 57b, 57c nozzle Elements, 58 connection piping, 70 control device, 71 motor control unit, 72 count measurement unit, 73 timer, 74 speed detection unit, 75 refueling control unit, 80 operation unit, 82 limit switch, 84 speed detection unit.

Claims (4)

A shutter that moves up and down by opening and closing an opening by driving an electric switch in accordance with a user operation;
An automatic refueling system for an electric shutter device, comprising: two guide rails that are arranged to face left and right side edges of the shutter and that guide the ascending and descending of the shutter.
An oil stretcher attached to the shutter and in contact with and facing the inner surface of the guide rail;
An oil supply device for supplying oil to a contact portion between the inner surface of the guide rail and the oil extending portion,
A control device for controlling refueling by the refueling device;
With
The control device has a number measuring unit that measures the number of times the shutter is moved up and down, and a timer that measures an elapsed time from an initial time.
When the number of times of counting by the number counting unit reaches a predetermined number, or when the measurement time of the timer reaches a predetermined time, whichever is earlier, let the refueling device perform refueling, and at the time of the operation of the shutter An automatic oil supply system for an electric shutter device, wherein oil is extended vertically in the inner surface of the guide rail by the oil extending unit. The automatic lubrication system for the electric shutter device according to claim 1,
The electric switch is disposed above the opening, and includes a winding unit that opens the opening by winding the shutter.
The automatic oil supply system of the electric shutter device, wherein the oil spreading unit is attached to a lower end of the shutter. The automatic lubrication system for the electric shutter device according to claim 1 or 2,
The guide rail includes two wall portions facing the front and back sides of the edge of the shutter, and an end wall portion connecting the two wall portions,
The oil stretcher has three brush portions facing the two wall portions and the end wall portion, respectively.
The automatic refueling system of the electric shutter device, wherein the refueling device refuels a contact portion between inner surfaces of the two wall portions and the end wall portion and a tip portion of the three brush portions. The automatic lubrication system for the electric shutter device according to any one of claims 1 to 3,
A speed detection unit that detects a vertical speed of the shutter,
The automatic refueling system for an electric shutter device, wherein the control device causes the refueling device to perform refueling when the detected value of the elevating speed becomes equal to or less than a predetermined speed.

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