JP7003013B2 - Automatic refueling system for electric shutter devices - Google Patents

Description

The present invention relates to an automatic refueling system for an electric shutter device, particularly a system for appropriately refueling an electric shutter device while eliminating the labor required for a worker to refuel the electric shutter device.

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

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

Japanese Unexamined Patent Publication No. 2008-23815

In the electric shutter device, if the number of times the shutter is opened and closed from the time of refueling increases, the oil is insufficient and the contact resistance between the left and right edges of the shutter and the guide rail increases, noise increases, and the opening and closing operation becomes unstable. become. Further, when the contact resistance becomes large, the load of the electric switch becomes excessive, and there is a problem that the life of the electric switch is shortened. Therefore, it is desirable to advance the timing of refueling when the number of times the shutter is opened and closed increases.

On the other hand, in the case of the configuration described in Patent Document 1, the operator can determine the necessary time for refueling according to the number of times the shutter is opened and closed by confirming the blinking of the display means. However, even in that case, it is troublesome for the operator to confirm the display means of the shutter and refuel when the blinking is confirmed. Further, even if the number of times the shutter is opened and closed 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 refueling may be required.

An object of the present disclosure is to realize a system capable of appropriately refueling an electric shutter device while eliminating the labor required for a worker to refuel the electric shutter device.

The automatic refueling system of the electric shutter device according to the present invention is arranged so as to face a shutter that moves up and down to open and close an opening by driving an electric switch according to a user's operation and facing both left and right edges of the shutter. It is an automatic refueling system of an electric shutter device including two guide rails for guiding the raising and lowering of the shutter. The automatic refueling system includes an oil spreading portion that is attached to the shutter and is in contact with the inner surface of the guide rail facing the inner surface, and a refueling device that refuels the contact portion between the inner surface of the guide rail and the oil stretching portion. A control device for controlling refueling by the refueling device is provided. The control device has a number-of-times measuring unit for measuring the number of times the shutter is raised and lowered, and a timer for measuring the elapsed time from the initial time point, and when the number of times measured by the number-of-times measuring unit reaches a predetermined number of times, or When the measurement time of the timer reaches a predetermined time, whichever is earlier, refueling is performed by the refueling device, and when the shutter is operated, the oil extension portion moves the inner surface of the guide rail in the vertical direction. Spread the oil.

According to the automatic refueling system of the electric shutter device according to the present invention, the shutter and the guide are automatically performed by refueling by the refueling device and the shutter raising / lowering operation at an appropriate time from the number of times the shutter is raised and lowered and the elapsed time from the initial time point. You can refuel a wide area between the rails. Increasing the number of ascents and descents and the elapsed time leads to a shortage of oil between the shutter and the guide rail and deterioration of the oil. Therefore, it is possible to appropriately refuel by refueling according to these. As a result, it is possible to appropriately refuel the electric shutter device while eliminating the labor required for the operator to refuel the electric shutter device.

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

According to the above preferable configuration, since the oil stretching portion is provided at the lower end portion of the shutter, the electric shutter device moves up and down while facing a wide range in the vertical direction on the inner surface of the guide rail when the shutter is operated. You can refuel in all directions.

In the automatic refueling system of the electric shutter device according to the present invention, preferably, the guide rail has two wall portions facing both front and back surfaces of the edge portion of the shutter and an end wall connecting the two wall portions. The oil stretching portion includes the two wall portions and three brush portions facing the end wall portions, respectively, and the refueling device is included in the two wall portions and the end wall portions. Lubricate the contact portion between the side surface and the tip portions of the three brush portions.

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

The automatic refueling system of the electric shutter device according to the present invention preferably includes a speed detection unit for detecting the elevating speed of the shutter, and the control device is used when the detected value of the elevating speed is equal to or less than a predetermined speed. , Refueling by the refueling device.

According to the above preferable configuration, it can be determined that when the ascending / descending speed of the shutter becomes a predetermined speed or less, the amount of oil between the shutter and the guide rail is insufficient and the contact resistance is increased. As a result, refueling can be performed at a more appropriate time.

According to the automatic refueling system of the electric shutter device according to the present invention, it is possible to appropriately refuel the electric shutter device while eliminating the labor required for the operator to refuel the electric shutter device.

It is a perspective perspective view of the electric shutter device including the automatic refueling system of the embodiment which concerns on this invention. It is an enlarged perspective perspective view of the part A of FIG. FIG. 2 is a cross-sectional view taken along the line BB of FIG. It is a perspective perspective view which shows the lowermost part of a shutter, a guide rail, and an oil discharge nozzle in the state where the shutter is raised most. FIG. 4A is a diagram showing a state in which oil is supplied to a contact portion between an inner side surface of an end wall portion of a guide rail and an oil stretched portion. It is a block diagram of the control device of an automatic refueling system. It is a flowchart which shows the method of controlling the refueling of a refueling device. 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 according to another embodiment of the present invention to a contact portion between an inner surface of a guide rail and an oil extension 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 depending on the specifications of the electric shutter device 1 including the automatic refueling system 10. In the following, the equivalent elements will be described with the same reference numerals in all the drawings. In addition, in the explanation in the text, the reference numerals described earlier shall be used as necessary.

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

The electric shutter device 1 raises and lowers the shutter 12 and opens and closes the opening 2 by driving the electric switch 18 in response to the operation of the operation unit 80 by the user. The electric switch 18 includes a winding unit 19 described later and a motor 21 connected to the winding unit 19. The opening 2 is, for example, an entrance / exit through which a person passes. FIG. 1 shows a state in which the shutter 12 is viewed from the inside to the outside of the building, and the shutter 12 is viewed from the back side to the front side. In FIGS. 1 to 4A and later in FIGS. 4B and 6, the left-right direction when the shutter 12 is viewed from the back side is indicated by X, the front-back direction is indicated by Y, and the vertical direction orthogonal to X and Y is indicated by Z. Shows.

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

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 columnar winding portion 19 is rotatably supported around an axis extending in the left-right direction X, and is located at one axial end (right end in FIG. 1) of the winding portion 19. Is connected to the motor 21. As a result, the winding unit 19 is rotated by driving the motor 21.

In the shutter 12, the slat 15 at the lowermost end has a smaller lateral X length than the other slat 14, and oil stretching portions 40 and 41, which will be described later, are fixed to the lateral X both side edges of the slat 15. In FIG. 1, the oil stretched portions 40 and 41 are shown by diagonal grid portions. Each oil stretching portion 40, 41 has three brush portions 43, 44, 45 (FIG. 2), and the tip of the brush portion 43 (the left end in FIG. 2) is at the same position as the left-right X end edge of the slats 14. Or slightly protrudes outward from the left-right X-edge of the slat 14.

The operation unit 80 is fixed near the shutter 12 on the wall surface of the building (not shown). Buttons B1, B2, and B3 for instructing ascending, stopping, and descending 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 in response 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 take-up portion 19. When the shutter 12 is wound by rotating the winding portion 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 portion 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 for detecting that the shutter 12 has been wound up to a position where the opening 2 is fully opened (fully opened position). When the limit switch 82 detects that the motor is fully open, the control device 70 stops the motor 21 and the number-of-times measuring unit 72 (FIG. 5), which will be described later, updates the stored number of ascending / descending times.

Two guide rails 30 and 31 are arranged so as to face the left-right direction X both side edges of the shutter 12. As shown by the guide rail 30 on the left side shown in FIG. 2, each of the guide rails 30 and 31 includes two wall portions 32 and 33 facing both sides of the front and back directions Y of the left and right direction X edges of the shutter 12. It includes an end wall portion 35 that connects the wall portions 32 and 33. Each of the wall portions 32 and 33 has a substantially U-shape having a cross-sectional shape with respect to a horizontal plane opening to the shutter 12 side. The left-right direction X both side edges of the shutter 12 are arranged inside the two guide rails 30 and 31, respectively, and guide the up and down movement of the shutter 12 in the vertical direction Z. The guide rails 30 and 31 are made of a metal plate such as a stainless alloy.

The automatic refueling system 10 is used to automatically refuel each of the two guide rails 30 and 31. For this purpose, the automatic refueling system 10 includes two oil stretching units 40 and 41, a refueling device 50, a speed detection unit 84, and a control device 70 for controlling refueling by the refueling device 50.

The two oil stretching 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 the mounting position and orientation are different. The oil stretching portion 40 on the left side will be described with reference to. The oil stretching portion 40 is formed from a rectangular parallelepiped block-shaped base portion 42, a tip surface F1 (FIG. 3) of the base portion 42, and two parallel side surfaces F2 and F3 (FIG. 3) adjacent to the tip surface F1. Each has three brush portions 43, 44, 45 protruding in a rectangular parallelepiped shape.

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

The tip of the brush portion 43 faces and contacts the inner surface of the end wall portion 35 of the guide rail 30. The tips of the two brush portions 44 and 45 come into contact with the inner surfaces of the two wall portions 32 and 33 of the guide rail 30 so as to face each other. When the shutter 12 moves up and down, the brush portions 43, 44, and 45 move while contacting the end wall portions 35 and the inner surfaces of the wall portions 32, 33. As a result, the brush portions 43, 44, 45 spread the oil supplied to the contact portion between the brush portions 43, 44, 45 and the guide rail 30 over a wide area in the entire vertical direction Z as described later. Can be done.

The refueling device 50 refuels the contact portion between the inner side surface of each of the guide rails 30 and 31 and the oil stretching portions 40 and 41. Specifically, the oil supply device 50 has 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 in 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 connecting pipe 58 leading to the upstream end of the oil discharge nozzle (not shown) on the right side is connected to the middle portion of the oil discharge nozzle 56 on the left side. The oil discharge nozzle 56 on the left side supplies oil to the inside of the upper part of the guide rail 30 on the left side, and the oil discharge nozzle on the right side supplies oil to the inside of the upper part of the guide rail 31 on the right side. The pump 52 and the solenoid valve 55 are driven by a command signal from the control device 70. In FIG. 1, the oil discharge nozzle 56 is shown in a simplified manner.

As shown in FIG. 4A, the oil discharge nozzle 56 has three branch-shaped nozzle elements 57a, 57b, and 57c branched at the lower end portion. The three nozzle elements 57a, 57b, 57c have their respective tip openings directed to the inner side surfaces of the wall portions 32, 33 and the end wall portions 35 inside the upper end portion of the guide rail 30. Each nozzle toward the contact portion between the brush portions 43, 44, 45 of the oil spreading portion 40 attached to the lowermost end portion of the shutter 12 with the shutter 12 raised to the innermost surface of the guide rail 30. Oil can be discharged from the tip openings of the elements 57c, 57a and 57b. For example, as shown in FIG. 4B, the contact portion G between the brush portion 43 protruding from the tip surface F1 of the oil stretching portion 40 and the inner surface of the end wall portion 35 of the guide rail 30 in a state where the shutter 12 is most raised. Oil is discharged from the nozzle element 57c toward the upper end of the. As a result, this oil permeates the tip of the brush portion 43 located at the contact portion G, so that when the shutter 12 is subsequently lowered, the oil is spread downward. In particular, since the oil stretching portion 40 is provided at the lower end portion of the shutter 12, the oil stretching portion 40 moves while facing a wide range in the vertical direction Z on the inner surface of the guide rail 30 when the shutter 12 is operated. As a result, it is possible to refuel a wide area of the electric shutter device 1 over the entire area Z in the vertical direction.

The speed detection unit 84 shown in FIG. 5 detects the ascending / descending 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 axis of the motor 21. The detection signal of the speed detection unit 84 is transmitted to the refueling control unit 75 (FIG. 5) of the control device 70 described later. As will be described later, the detected value of the ascending / descending speed of the shutter 12 has a contact resistance due to insufficient oil at the contact portion between the oil spreading portions 40 and 41 attached to the shutter 12 and the guide rails 30 and 31. It is used to determine whether or not it has grown. The speed detection unit 84 may be composed of a resolver and a speed calculation unit in which a detection signal from the resolver is input and the rotation speed of the motor is calculated from the detection signal. At this time, the speed calculation unit is realized by some functions of the control device.

The speed detection unit is not limited to the above example, and may detect the ascending / descending speed of the shutter 12 magnetically or optically by using a sensor facing the shutter 12. For example, in the left-right edge portion of the shutter, the magnetic characteristics may be alternately different at equal intervals in the vertical direction, and the speed detection unit may be configured by a magnetic sensor facing the left-right edge portion of the shutter. At this time, the speed detection unit detects the change speed of the magnetic characteristics of the left-right edge portion of the shutter from the detection value of the magnetic sensor, and calculates the ascending / descending speed of the shutter 12 from the detection result.

Further, a hole penetrating in the front and back directions is formed at an equidistant position in the vertical direction of the left-right edge portion of the shutter 12, and a speed detection unit is configured by a light emitting unit and a light receiving unit facing the position through which the hole passes. May be good. At this time, the speed detection unit measures the time interval when the light receiving unit receives the light from the light emitting unit, and calculates the ascending / descending speed of the shutter 12 from the measurement result.

The control device 70 drives the pump 52 and the solenoid valve 55 of the refueling 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 block diagram of the control device 70. The control device 70 includes a motor control unit 71, a frequency measurement 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 in response to a command signal from the operation unit 80. When the number-of-times measuring unit 72 determines 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 unit 72 measures and updates the number of times of raising and lowering the shutter 12. The measured number of ascents and descents is output to the refueling control unit 75. The number of ascents and descents is measured from the time when the control device 70 is started. Then, when the number of ascending / descending times reaches a predetermined number of times, the refueling device 50 is controlled so that refueling between the shutter 12 and the guide rails 30 and 31 is executed by the refueling control unit 75 described later. Increasing the number of ascents and descents leads to a shortage of oil between the shutter 12 and the guide rails 30 and 31, and refueling can be performed appropriately. The control device 70 may reset the number of ascending / descending times when refueling is executed, and may start remeasurement of the number of ascending / descending times from that point. Then, when the number of ascending / descending times reaches a predetermined number of times, refueling may be executed.

The timer 73 measures the elapsed time from the initial time point, specifically, the start time time of the control device 70, 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 ascending / descending times reaches the predetermined number, the refueling control unit 75 described later executes 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 oil between the shutter 12 and the guide rails 30 and 31, and shortage of oil. Therefore, it is better to refuel according to the measurement time as well as the number of ascents and descents. Can be refueled properly. The control device 70 may reset the measurement time when refueling is executed, and may start re-measurement of the elapsed time from that point. Then, when the measurement time further reaches a predetermined time, refueling may be executed. In this embodiment, the elapsed time from the initial time when the electric shutter starts operating is used as the measurement time, but considering the actual frequency of use of the shutter, the shutter opens and closes during this measurement time. You may add up only the period you are in.

When the number of times measured by the number-of-times measuring unit 72 reaches a predetermined number of times, or when the measured time of the timer 73 reaches a predetermined time, whichever is earlier, the refueling control unit 75 operates the shutter 12 next time. The pump 52 and the solenoid valve 55 are controlled so that the refueling device 50 refuels. The next shutter operation may be ascending or descending. Whether the operation for refueling is to be raised or lowered is set in advance by the control device 70. The oil supply control unit 75 discharges a predetermined amount of oil from the oil discharge nozzle 56 of the oil supply device 50 to the contact portions of the guide rails 30 and 31 and the brush portions of the oil extension portions 40 and 41. The oil is, for example, a liquid lubricating oil or a semi-solid grease.

By such refueling, the control device 70 moves the oil stretching portions 40 and 41 in the vertical direction during the operation of the shutter 12 after the refueling, so that the control device 70 moves the oil in the vertical direction on the inner surface of the guide rails 30 and 31. Stretch out. As a result, as will be described later, the electric shutter device 1 can be appropriately refueled while eliminating the labor required for the operator to refuel the electric shutter device 1.

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

FIG. 6 is a flowchart showing 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 ascending / descending operation of the number of times measuring unit 72 (FIG. 5) has reached a predetermined number of times. The ascending / descending operation is performed once, for example, when the shutter 12 is lowered and then raised. The order of descending and ascending in one ascending / descending operation may be reversed. When the determination in step S11 is affirmative (YES), that is, when the number of measurements reaches a predetermined number of times, 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 or not the measurement time of the timer 73 (FIG. 5) has reached a predetermined time. If the determination in step S12 is affirmative (YES), that is, when the measurement time reaches a 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 ascending / descending speed of the speed detection unit 74 (FIG. 5) is equal to or less than the predetermined speed. If the determination in step S13 is affirmative (YES), that is, if the ascending / descending speed is equal to or less 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 is terminated, so the process returns to step S11 and the process is repeated.

In step S14, since it is determined that refueling is necessary, the refueling device is applied to the contact portion between the guide rails 30 and 31 and the oil spreading portions 40 and 41 when the shutter 12 is operated next time, for example, when the shutter 12 is raised next time. The oil is refueled by 50, and the processing by the refueling control unit 75 is completed.

Since the contact portion is refueled in step S14, the oil is stretched in the vertical direction on the inner surface of the guide rails 30 and 31 by the oil stretching portions 40 and 41 when the shutter 12 is operated, for example, when the shutter 12 is lowered.

According to the automatic refueling system 10 of the electric shutter device 1 described above, the refueling device 50 automatically refuels the shutter 12 at an appropriate time based on the number of times the shutter 12 is raised and lowered and the elapsed time from the initial time point, and the shutter 12 is automatically raised and lowered. Refueling can be performed on a wide portion in the vertical direction between the shutter 12 and the guide rails 30 and 31. Increasing the number of ascending / descending times and the elapsed time leads to a shortage of oil between the shutter 12 and the guide rails 30 and 31, and deterioration of the oil. Therefore, it is possible to appropriately refuel by refueling according to these. As a result, it is possible to appropriately refuel the electric shutter device 1 while eliminating the labor required for the operator to refuel the electric shutter device 1. Therefore, it is possible to suppress noise generated when the guide rail of the electric shutter device 1 and the shutter rub against each other due to insufficient refueling. Further, it is possible to suppress the one-sided rise of the shutter 12 due to the difference in resistance between the left and right edge portions of the shutter 12 and the contact portion between the guide rails, and the failure due to the overload of the motor.

Further, the oil stretching portions 40, 41 have three brush portions 43, 44, 45 facing the two wall portions 32, 33 and the end wall portions 35, respectively. The refueling device 50 refuels the contact portion between the inner side surface of the two wall portions 32, 33 and the end wall portion 35 and the tip portions of the three brush portions 43, 44, 45. As a result, the two wall portions 32, 33 and the end wall portion 35 of the guide rail can be refueled, so that the contact resistance between the shutter 12 and the guide rail can be further reduced. The oil stretching portion has only a part of the three brush portions 43, 44, 45, and the refueling device is inside the wall portion or the end wall portion facing the part of the brush portion. You may lubricate the contact portion between the side surface and the tip portion of a part of the brush portion.

Further, the automatic refueling system 10 has a speed detection unit 84 that detects the ascending / descending speed of the shutter 12, and the control device 70 determines the next shutter 12 when the detected value of the ascending / descending speed of the shutter 12 becomes equal to or less than a predetermined speed. At the time of operation, refueling is performed by the refueling device 50. As a result, when the ascending / descending speed of the shutter 12 becomes equal to or lower than the predetermined speed, it can be determined that the amount of oil between the oil spreading portions 40 and 41 and the guide rails 30 and 31 is insufficient and the contact resistance is increased. Therefore, by refueling when the shutter 12 is operated next time, refueling can be performed at a more appropriate time. The speed detection unit may be omitted, and the control device may determine the refueling time to the contact portion between the guide rail and the oil extension portion only from the number of measurements by the number measurement unit and the measurement time by the timer.

In the above, the case where the oil supply device 50 includes the solenoid valve 55 has been described. However, when the oil is semi-solid such as grease, the solenoid valve is omitted 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 the oil discharge nozzle 56 connected to the oil supply device 50 (FIG. 1) of the automatic oil supply system in another example of the embodiment to the contact portion between the inner surface of the guide rail 30 and the oil extension portion 40. It is a figure corresponding to FIG. 4B which shows.

In the case of the configuration of this example, unlike the configuration shown in FIG. 4B, the shutter 12 is completely raised from the inner surface of the end wall portion 35 of the guide rail 30 in the state immediately before the shutter 12 is raised most. Oil is sometimes discharged from the nozzle element 57c of the oil discharge nozzle 56 toward a position where the brush portion 43 is scheduled to come into contact. At this time, the brush portion 43 is at the solid line position in FIG. 7. After that, as shown by the alternate long and short dash 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. .. As a result, oil is supplied to the contact portion between the inner side surface of the end wall portion 35 and the brush portion 43. After that, the shutter 12 is lowered as shown by the arrow β in FIG. 7, so that the refueled oil is extended downward. FIG. 7 shows a case where oil is supplied to the contact portion between the brush portion 43 fixed to the tip surface F1 of the oil stretching portion 40 and the end wall portion 35, but the side surfaces F2 and F3 of the oil stretching portion 40 shown in FIG. 3 are shown. The same applies to the case of refueling the contact portion between the brush portions 44 and 45 fixed to the wall portion 32 and 33 and the wall portions 32 and 33.

In such a configuration, the oil is semi-solid such as grease, and the brush portions 43, 44 are simply discharged above the contact portion between the tips of the brush portions 43, 44, 45 and the guide rail 30. Even when it is difficult for oil to permeate into, 45, oil can be satisfactorily supplied to the contact portion between the brush portion and the guide rail. In this example, other configurations and operations are the same as those of FIGS. 1 to 6.

Although not shown, in each of the above examples, oil is supplied to the contact portion between the inner surface of the guide rail and the oil stretching portion when the shutter 12 is lowered, and the guide is guided by the movement of the oil stretching 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 refueling timing according to the insufficient amount of oil in the contact portion between the guide rails 30 and 31 and the oil extension portions 40 and 41, the oil in the contact portion is determined. The presence or absence of the above may be electrically detected. For example, the brush portion and the base portion of the oil stretching 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 with a DC power source. At this time, the current flowing in the electric circuit is detected by the current sensor. When electrically insulating oil or oil having a high degree of electrical insulation is supplied to the contact portion between the inner surface of the guide rails 30 and 31 and the oil stretched portion, the electrical resistance at this contact portion increases, so that the current sensor has a current sensor. The detected value becomes smaller. After that, when the detection value of the current sensor becomes low, 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 a predetermined value, the refueling device 50 may refuel at the next operation of the shutter 12.

In each of the above examples, the oil stretching portions 40 and 41 are attached to the lower ends of the left and right edge portions of the shutter 12. On the other hand, the oil stretching portion can be attached to a portion other than the lower end portion of the shutter 12. Further, it is also possible to attach the oil stretching portion to only one of the left and right edge portions of the shutter 12 in the left-right direction, and to supply oil only to the contact portion between the one guide rail and the oil stretching portion.

1 electric shutter device, 2 openings, 10 automatic refueling system, 12 shutters, 14,15 slats, 17 cases, 18 electric switches, 19 take-up parts, 21 motors, 30, 31 guide rails, 32, 33 walls, 35 end wall part, 40, 41 oil stretching part, 42 base part, 43, 44, 45 brush part, 50 refueling device, 51 oil tank, 52 pump, 55 solenoid valve, 56 oil discharge nozzle, 57a, 57b, 57c nozzle Elements, 58 connecting pipes, 70 control devices, 71 motor control units, 72 frequency measurement units, 73 timers, 74 speed detection units, 75 refueling control units, 80 operation units, 82 limit switches, 84 speed detection units.

Claims (4)

A shutter that moves up and down to open and close the opening by driving an electric switch according to the user's operation,
An automatic refueling system for an electric shutter device, comprising two guide rails arranged facing both left and right edges of the shutter to guide the raising and lowering of the shutter.
An oil spreading portion attached to the shutter and in contact with the inner side surface of the guide rail,
An oil supply device that supplies oil to the contact portion between the inner surface of the guide rail and the oil extension portion,
A control device that controls refueling by the refueling device, and
Equipped with
The control device has a number-of-times measuring unit for measuring the number of times the shutter is raised and lowered, and a timer for measuring the elapsed time from the initial time point.
When the number of measurements of the number-of-times measuring unit reaches a predetermined number of times, or when the measurement time of the timer reaches a predetermined time, whichever is earlier, refueling by the refueling device is performed, and when the shutter is operated. An automatic refueling system for an electric shutter device that uses the oil stretcher to stretch oil in the vertical direction on the inner surface of the guide rail. In the automatic refueling system of the electric shutter device according to claim 1,
The electric switch is arranged above the opening and includes a winding portion that opens the opening by winding the shutter.
The oil spreading portion is an automatic refueling system for an electric shutter device attached to the lower end portion of the shutter. In the automatic refueling system of the electric shutter device according to claim 1 or 2.
The guide rail includes two wall portions facing each other on both front and back surfaces of the edge portion of the shutter, and an end wall portion connecting the two wall portions.
The oil stretching portion has three brush portions facing the two wall portions and the end wall portions, respectively.
The refueling device is an automatic refueling system for an electric shutter device that refuels a contact portion between the inner surfaces of the two wall portions and the end wall portion and the tip portions of the three brush portions. In the automatic refueling system of the electric shutter device according to any one of claims 1 to 3.
A speed detection unit for detecting the ascending / descending speed of the shutter is provided.
The control device is an automatic refueling system for an electric shutter device that refuels with the refueling device when the detected value of the ascending / descending speed becomes a predetermined speed or less.

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