JP2014080043A - Grille shutter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grille shutter device capable of securing high reliability by suppressing excessive operation of a shutter mechanism.SOLUTION: A grille shutter device includes a shutter mechanism capable of controlling the flow rate of air flowing into an engine room by opening and closing the grille opening in the front of a vehicle body and an ECU controlling the operation of the shutter mechanism. The ECU measures the total number N of operations of the shutter mechanism and the period number n of operations, and, when the measured total number N of operations exceeds the accumulation upper limit N0 or when the period number n of operations exceeds the period upper limit value n0, restricts the operation of the shutter mechanism.

Description

  The present invention relates to a grill shutter device.

  2. Description of the Related Art Conventionally, there is a grill shutter device capable of controlling the flow rate of air flowing into an engine room from the grill opening based on the opening / closing operation of a shutter mechanism provided at the grill opening at the front of the vehicle body (for example, Patent Document 1). reference).

  That is, for example, during high speed running, the aerodynamic performance (for example, “Cd value”) can be improved by closing the shutter mechanism and restricting the inflow of air into the engine room. Further, when the engine is started, the warm-up time can be shortened by suppressing the flow rate introduced into the radiator. When the engine temperature tends to increase, the engine temperature can be appropriately managed by increasing the flow rate of the shutter mechanism opened to flow into the engine room.

JP 2010-260440 A

  However, increasing the opening / closing operation of the shutter mechanism tends to shorten its useful life. This also increases the possibility of failure, so that there is still room for improvement in this respect.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a grille shutter device capable of ensuring high reliability by suppressing excessive operation of the shutter mechanism. .

  In order to solve the above problems, the invention according to claim 1 is a shutter mechanism capable of controlling a flow rate of air flowing into the vehicle body by opening and closing a grille opening at the front of the vehicle body, and an operation of the shutter mechanism. A control unit that controls the shutter mechanism, wherein the control unit measures the number of operations of the shutter mechanism, and the shutter mechanism when the number of operations exceeds an upper limit value. The gist of the present invention is to provide an operation restricting means for restricting the operation.

  According to the above configuration, excessive operation of the shutter mechanism can be suppressed. And thereby, high reliability can be ensured by suppressing the occurrence of a failure due to the durability of the shutter mechanism (each component constituting the shutter mechanism and its drive source).

The gist of the invention described in claim 2 is that the operation limiting means limits the operation of the shutter mechanism when the total number of operations exceeds the cumulative upper limit value.
According to the above configuration, it is possible to effectively suppress the occurrence of a failure due to the durability of the shutter mechanism.

  According to a third aspect of the present invention, when the operation count measured within a unit period exceeds a period upper limit value, the operation restriction unit operates the shutter mechanism until the unit period elapses. The gist is to restrict.

  That is, an increase in the number of operations per unit period may cause an excessive load on the shutter mechanism. Therefore, according to the said structure, generation | occurrence | production of the failure resulting from the durability can be suppressed effectively. When combined with the operation restriction based on the total number of operations (total number of operations), the period until the total number of operations reaches the cumulative upper limit value can be delayed.

The gist of the invention described in claim 4 is that when the operation of the shutter mechanism is limited, the shutter mechanism is in an open state.
The gist of the invention described in claim 5 is that the operation restriction of the shutter mechanism prohibits the closing operation of the shutter mechanism.

According to each configuration described above, even when the operation of the shutter mechanism is limited, it is possible to avoid a situation where the amount of air flowing into the vehicle body is insufficient and to ensure sufficient cooling performance.
According to a sixth aspect of the present invention, the control means includes end point confirmation means capable of confirming that the shutter mechanism has been operated to the end point at which the shutter mechanism is fully opened or fully closed, and after the operation control of the shutter mechanism, the end point If it is not confirmed that the operation has been performed, the operation control is executed again, and the operation restriction of the shutter mechanism prohibits the operation control again.

According to the above configuration, it is possible to effectively suppress the excessive operation of the shutter mechanism.
The gist of the invention described in claim 7 is that it comprises an informing means for informing the operation restriction of the shutter mechanism.

  According to the above configuration, early inspection can be promoted, and the uncomfortable feeling caused by the execution of the operation restriction can be alleviated.

  According to the present invention, it is possible to suppress the excessive operation and ensure high reliability of the shutter mechanism.

The schematic diagram which shows schematic structure of the vehicle by which the grille shutter apparatus concerning this invention is mounted. The control block diagram of a grill shutter apparatus. The flowchart which shows the process sequence of the operation frequency measurement of a shutter mechanism, and the operation | movement restriction | limiting determination based on the said operation frequency. The flowchart which shows the process sequence of the operation | movement restriction | limiting based on the frequency | count of an operation | movement. The flowchart which shows an example of the operation | movement restriction | limiting by prohibition of retry operation | movement.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
In the vehicle 1 shown in FIG. 1, a radiator 5 for cooling the engine 4 is accommodated in an engine room 3 formed inside the vehicle body 2. In addition, a grill opening 7 is formed in the front portion of the vehicle body 2 (the left end portion in the figure) to communicate the external space in front of the vehicle and the internal space of the vehicle body 2. The radiator 5 is arranged in front of the engine 4 so that air flowing from the grill opening 7 into the engine room 3 is hit.

  A fan 6 is provided behind the radiator 5 (on the right side in the figure). As the fan 6 rotates, air flows efficiently through the radiator 5.

  In the present embodiment, the grill opening 7 is formed below the bumper 8. A front grille 9 constituting a design surface (lower grille) is attached to the opening end 7 a of the grill opening 7. The vehicle 1 according to this embodiment includes a grill shutter device 10 that can control the flow rate of air flowing into the engine room 3 from the grill opening 7.

  More specifically, the grill shutter device 10 includes a shutter mechanism 11 that can control the flow rate of air based on the opening / closing operation, and an actuator 12 that opens / closes the shutter mechanism 11.

  The shutter mechanism 11 of the present embodiment is formed by arranging a plurality of movable fins 14 in a frame 13 formed in a substantially square frame shape. Specifically, the upper end of the frame 13 is fixed to the bumper reinforcement 15 so as to be disposed in the grill opening 7. Each of the movable fins 14 is rotatably supported by a rotation shaft 16 that extends over the width direction of the frame 13 (a direction orthogonal to the paper surface in the figure). Each movable fin 14 is provided with a fin portion 17 capable of closing the inside of the frame 13 by rotating about the rotation shaft 16.

  That is, in the shutter mechanism 11, each movable fin 14 rotates in a direction (see FIG. 1, clockwise direction) in which the fin portion 17 is parallel to the inflow direction of the air flowing from the grill opening 7. Open state. Further, the movable fins 14 are closed by rotating in a direction (see FIG. 1, counterclockwise direction) where the fin portions 17 intersect with the air inflow direction. And when each movable fin 14 exists in the rotation position corresponding to a fully closed state, the front-end | tip (fin tip of the fin part 17) of each adjacent movable fin 14 overlaps, and the inside of the flame | frame 13 is carried out. It can be blocked.

  On the other hand, as shown in FIG. 2, the actuator 12 of the present embodiment drives the shutter mechanism 11 to open and close by converting the rotation of the motor 18 into the rotation of each movable fin 14. In the present embodiment, the motor 18 serving as the drive source rotates based on the drive power supplied by the ECU 20. The ECU 20 serving as a control unit controls the operation of the shutter mechanism 11 through the supply of driving power to the motor 18.

  More specifically, in the present embodiment, various vehicle state quantities such as the vehicle speed V and the coolant temperature Tw of the engine 4 are input to the ECU 20. Then, the ECU 20 performs operation control of the shutter mechanism 11 based on these vehicle state quantities.

  Specifically, the ECU 20 starts communication of each vehicle state quantity via an in-vehicle network (not shown), so that the ignition switch of the vehicle 1 is turned on (IG on), that is, the vehicle 1 travels. Recognize that the vehicle is in a state of preparation or running preparation. Then, until the cooling water temperature Tw rises, well-known operation control such as closing the shutter mechanism 11 or closing the shutter mechanism 11 by increasing the vehicle speed V is executed.

  Note that the ECU 20 of the present embodiment causes the ignition switch of the vehicle 1 to be turned off (IG off), that is, the vehicle 1 is in a running end state due to the interruption of communication of each vehicle state quantity via the in-vehicle network. Recognize that.

  In the present embodiment, the ECU 20 is connected to a pulse sensor 22 provided in the actuator 12, and the ECU 20 is based on a pulse signal Sp synchronized with the rotation of the motor 18 input from the pulse sensor 22. The operating amount of the shutter mechanism 11 is detected. Further, the ECU 20 is connected to a limit switch 23 capable of confirming the fully open or fully closed position of the shutter mechanism 11, that is, its end point operation. And ECU20 becomes a structure which performs the completion | finish determination of the operation | movement control based on the operation amount of the shutter mechanism 11 detected based on the said pulse signal Sp, and the output signal (on / off signal) Ssw of the limit switch 23. FIG. ing.

(Measurement of the number of operations and operation restriction based on the number of operations)
Next, measurement of the number of operations performed by the ECU 20 of the present embodiment and operation limitation based on the number of operations will be described.

  In the present embodiment, the ECU 20 measures the number of operations of the shutter mechanism 11. Specifically, the ECU 20 counts the total number of operations accumulated from the shipping state (total number of operations N) and the number of operations per unit period (period operation number n) with one day (24 hours) as a unit period. Measure. In the present embodiment, an upper limit value (cumulative upper limit value N0 and period upper limit value n0) is set for each of the total operation number N and the period operation number n. In the present embodiment, the period upper limit value n0 is set based on the assumed usage period, the unit period, and the cumulative upper limit value N0 of the shutter mechanism 11. Then, the ECU 20 of the present embodiment restricts the operation of the shutter mechanism 11 when the total number of operations N to be measured exceeds the cumulative upper limit value N0 and when the number of operation times n exceeds the period upper limit value n0. It is the composition to do.

  More specifically, as shown in the flowchart of FIG. 3, when the opening operation control of the shutter mechanism 11 is completed (step 101: YES), the ECU 20 subsequently increments the total operation number N and the period operation number n to be measured. (N = N + 1, step 102, and n = n + 1, step 103). Next, the ECU 20 determines whether or not the total number of operations N has exceeded the cumulative upper limit value N0 (step 104), and whether or not the number of operation times n has exceeded the period upper limit value n0 (step 105). If the total number of operations N exceeds the cumulative upper limit N0 (N> N0, step 104: YES), an operation restriction flag is set (step 106), and the period operation number n is set to the period upper limit value. If n0 is exceeded (n> n0, step 105: YES), a period operation restriction flag is set (step 107).

  If it is determined in step 101 that the shutter mechanism 11 has not been opened (step 101: NO), the ECU 20 does not execute the processing from step 102 onward. When the total number of operations N is equal to or less than the cumulative upper limit value N0 (N ≦ N0, step 104: NO), and the number of operation times n is equal to or less than the period upper limit value n0 (n ≦ n0, step 105: NO). ) Does not execute the processing of step 106 and step 107.

  Further, as shown in the flowchart of FIG. 4, when the ECU 20 acquires various state quantities related to the operation control in the operation control start process (step 201), whether or not the unit period has elapsed has passed. Is determined (step 202). When the unit period has elapsed (step 202: YES), the number of period operation times n to be measured is reset (n = 0, step 203), and the period operation restriction flag is cleared (step 204).

  Note that the ECU 20 of this embodiment determines that the unit period has elapsed with the update of the date confirmed by the timepiece function of the vehicle. In step 202, when the unit period has not elapsed (step 202: NO), the processing of step 203 and step 204 is not executed.

  Next, the ECU 20 performs an open operation condition determination (step 205) and a close operation condition determination (step 206). When the opening operation condition is satisfied (step 207: YES), the opening operation control of the shutter mechanism 11 is executed (step 208).

  On the other hand, if the closing operation condition is satisfied (step 209: YES), then whether or not the operation restriction flag is set (step 210) and whether or not the period operation restriction flag is set. Is determined (step 211). Then, only when the operation restriction flag and the period operation restriction flag are not set (step 210: NO, and step 211), the closing operation control of the shutter mechanism 11 is executed (step 212).

  When at least one of the operation restriction flag and the period operation restriction flag is set in step 210 or step 211 (step 210: YES or step 211: YES), the ECU 20 determines that the closing operation condition is As in the case where it is not established (step 209: NO), the closing operation control of the shutter mechanism 11 is not executed.

Next, the operation of the grill shutter device 10 according to the present embodiment configured as described above will be described.
In the grill shutter device 10 of the present embodiment, when the total number of operations N of the shutter mechanism 11 exceeds the cumulative upper limit N0 (N> N0) and when the period operation number n exceeds the period upper limit n0 ( When n> n0), the closing operation control is not executed. Thereby, an excessive operation of the shutter mechanism 11 is suppressed.

  Even when the operation is restricted, the opening operation of the shutter mechanism 11 is not prohibited. That is, when the operation of the shutter mechanism 11 is limited, the shutter mechanism 11 is in an open state. Thus, the shutter mechanism 11 is prevented from remaining in the closed state, and the sufficient cooling performance is ensured.

  Further, as shown in FIG. 2, in this embodiment, the ECU 20 notifies the execution of the operation restriction via an output device (for example, a meter, a display, or a speaker) 25 installed in a vehicle interior (not shown). . Specifically, in addition to performing the closing operation restriction, the ECU 20 as the notification means that the number of operations of the shutter mechanism 11 has exceeded the upper limit value and that the shutter mechanism 11 needs to be inspected ( (When the total number of operations N exceeds the cumulative upper limit N0). As a result, early inspection is promoted, and the uncomfortable feeling caused by the execution of the operation restriction is reduced.

As described above, according to the present embodiment, the following effects can be obtained.
(1) The grill shutter device 10 includes a shutter mechanism 11 that can control the flow rate of air flowing into the engine room 3 by opening and closing the grill opening 7 at the front of the vehicle body, and an ECU 20 that controls the operation of the shutter mechanism 11. With. Further, the ECU 20 as a measuring unit measures the total number of operations N and the number of period operations n of the shutter mechanism 11. Then, the ECU 20 as the operation limiting means operates the shutter mechanism 11 when the total number of operations N to be measured exceeds the cumulative upper limit value N0 and when the period operation number n exceeds the period upper limit value n0. Limit.

  That is, as described above, by restricting the operation of the shutter mechanism 11 based on the total number of operations N, a failure due to the durability of the shutter mechanism 11 (the components constituting the shutter mechanism 11 and the motor 18 serving as a driving source thereof). Can be suppressed.

  (2) Further, an increase in the number of operations per unit period may cause an excessive load on the shutter mechanism 11. Therefore, by restricting the operation of the shutter mechanism 11 based on the number of operation times n as described above, it is possible to effectively suppress the occurrence of a failure due to its durability. Further, it is possible to delay the period until the total number of operations N reaches the cumulative upper limit N0.

  (3) When the number of operations (N, n) of the shutter mechanism 11 exceeds the upper limit value (N0, n0), the closing operation of the shutter mechanism 11 is prohibited as the operation restriction. Even when the operation is restricted, the opening operation of the shutter mechanism 11 is not prohibited.

  According to the above configuration, the shutter mechanism 11 can be opened even when the operation of the shutter mechanism 11 is limited. As a result, it is possible to avoid a situation where the amount of air flowing into the vehicle body is insufficient, and to ensure sufficient cooling performance.

  (4) The ECU 20 as notification means notifies the execution of the operation restriction via the output device 25. As a result, early inspection can be promoted, and the uncomfortable feeling caused by the execution of the operation restriction can be alleviated.

In addition, you may change the said embodiment as follows.
In the above embodiment, the air flowing from the grill opening 7 is taken into the engine room 3 formed in the vehicle body 2. However, the present invention is not limited to this, and the air intake destination may not be the engine room 3 as long as it is an internal space of the vehicle body 2 that can control the flow rate of the air flowing in based on the opening / closing operation of the shutter mechanism 11. That is, for example, a space in which air flowing in from the grill opening 7 is introduced, such as a heat exchanger accommodating chamber such as the radiator 5, or a vehicle in which an engine is arranged at the rear or center of the vehicle body or an electric vehicle. For example, the present invention may be applied to a vehicle in which an engine is not mounted in a vehicle interior space ahead of the passenger compartment.

  In the above embodiment, the grill opening 7 is formed below the bumper 8. However, the present invention is not limited to this, and the present invention may also be applied to the grill opening 7 provided above the bumper 8. That is, the front grill 9 may be an upper grill.

  In the above embodiment, the shutter mechanism 11 opens and closes based on the rotation of each movable fin 14. However, the present invention is not limited to this, and the form of the shutter mechanism may be, for example, a so-called slide type or a type in which the movable body swings in addition to the so-called rotation type.

  In the above embodiment, the shutter mechanism 11 is driven to open and close by the actuator 12 using the motor 18 as a drive source. However, an actuator unit corresponding to the actuator 12 may be built in the shutter mechanism.

  In the above embodiment, the ECU 20 measures the total number of operations N and the number of operation times n as the number of operations of the shutter mechanism 11. Then, when the total number of actuations N to be measured exceeds the cumulative upper limit N0, and when the period actuations n exceeds the period upper limit n0, the operation of the shutter mechanism 11 is limited. However, the present invention is not limited to this, and the configuration may be such that only the total number of operations N is measured as the number of operations, and the operation of the shutter mechanism 11 is limited when the total number of operations N exceeds the cumulative upper limit value N0. . Then, only the period operation count n is measured as the operation count, and this is not excluded even when the operation limit of the shutter mechanism 11 is limited when the period operation count n exceeds the period upper limit value n0.

  In the above embodiment, a unit period is one day (24 hours). Then, the number of operations per unit period is measured as the number of operation times n. However, the present invention is not limited to this, and the unit period may be arbitrarily changed. For example, measurement may be performed in units of weeks, months, or years. Further, the number of operation times n does not necessarily have to be the number of operations per unit time. For example, the number of operations per so-called “one trip”, that is, per vehicle travel may be set as the number of operation times n.

  In the above embodiment, when the number of operations (N, n) of the shutter mechanism 11 exceeds the upper limit value (N0, n0), the closing operation of the shutter mechanism 11 is prohibited as the operation restriction. Even when the operation is restricted, the opening operation of the shutter mechanism 11 is not prohibited. However, the form of the operation restriction is not necessarily limited to this.

  For example, all operations including the opening operation may be prohibited. Further, not all the operations are prohibited, but at least one of the operation controls may be “thinned out and executed”. And it is good also as a structure from which the form differs by the operation | movement restriction | limiting based on the total operation frequency N, and the operation | movement restriction | limiting based on the period operation | movement number n.

  In the above embodiment, the shutter mechanism 11 is in the open state when the operation is restricted. However, this is also excluded from the configuration in which the operation is restricted when the shutter mechanism 11 is in the closed state. do not do.

  Furthermore, when it is not confirmed that the shutter mechanism 11 has moved to the end point (fully opened position or fully closed position) corresponding to the fully open or fully closed state, the same operation control is executed again, that is, a so-called retry operation is performed. As for the thing, such a retry operation may be prohibited as the operation restriction.

  For example, as shown in the flowchart of FIG. 5, the operation control execution process (see FIG. 4, “step 208 and step 212”), more specifically, in the end determination process, the pulse count (edge count of the pulse signal Sp) Is greater than or equal to a predetermined value set corresponding to the end point of the shutter mechanism 11 (step 301) Next, when the pulse count is greater than or equal to the predetermined value (step 301: YES). Subsequently, it is determined whether or not a limit switch 23 (see FIG. 1, fully open SW or fully closed SW) as end point confirmation means provided at the end point of the shutter mechanism 11 is “ON” (step 302). ). If the limit switch 23 is “ON” (step 302: YES), it is determined that the operation control has been completed normally (step 303).

  On the other hand, if the limit switch 23 is not “ON” in step 302 (step 302: NO), it is determined that the operation control has ended abnormally (step 304). Furthermore, it is preferable to set a time over rule by measuring the execution time t1 of the operation control. That is, when the pulse count is less than the predetermined value in step 301 (step 301: NO), it is subsequently determined whether or not the execution time t1 exceeds a predetermined threshold value t_th (step 305). ). Even when the execution time t1 exceeds the predetermined threshold t_th (step 305: YES), it is determined in step 304 that the operation control has ended abnormally.

  Here, when it is determined that the operation control has ended abnormally in this way, subsequently, whether or not the operation limit flag is set (step 306) and whether or not the period operation limit flag is set. It is determined whether or not (step 307). Then, only when the operation limit flag and the period operation limit flag are not set (step 306: NO and step 307), the retry flag may be set to execute the retry operation.

  That is, when at least one of the operation restriction flag and the period operation restriction flag is set (step 306: YES or step 307: YES), the retry flag is not set. In such a case, for example, by preventing the opening operation condition regarding the retry operation from being satisfied (see FIG. 4, step 205 and step 207), the operation of the shutter mechanism 11 is restricted by prohibiting the retry operation. It can be performed.

Even with such a configuration, excessive operation of the shutter mechanism 11 can be suppressed. And thereby, the occurrence of a failure due to the durability can be suppressed.
Note that the confirmation direction of the end point is not limited to the one shown in the above example, but only the combination of the pulse count and the time over regulation (when the execution time t1 exceeds the predetermined threshold value t_th, the pulse count is less than the predetermined value). In some cases, NG) or only the limit switch 23 may be used.

  In addition, such a “prohibition of retry operation” may be performed only in one of the operation restriction based on the total operation number N or the operation restriction based on the period operation number n. The basic shutter mechanism 11 opening / closing control is not changed, and only the “prohibition of retry operation” is used to limit the operation based on the number of operations (N, n). This is not excluded.

  In the above embodiment, the total operation number N and the period operation number n are measured at the end of the opening operation control (see FIG. 3, step 101 to step 103). The timing may be arbitrarily changed. That is, in the above-described embodiment, it is defined that the number of operations is incremented when the shutter mechanism 11 is changed from the open state to the closed state and then opened again. However, the present invention is not limited to this, and the number of operations may be incremented after each of the opening operation and the closing operation. In this case as well, it is needless to say that the shutter mechanism 11 is desirably open when the operation is limited.

  In the above embodiment, the operation restriction (period operation restriction flag) based on the period operation number n is released with the lapse of the unit period (see FIG. 4, step 202 to step 204), but the total operation number N Regarding the operation restriction based on the above, it may be configured to be released by inspection or replacement of parts. The release means in this case may be configured such that the operation restriction flag is cleared automatically by parts replacement or by a specific input operation.

Next, technical ideas that can be grasped from the above embodiments will be described together with effects.
(B) The period upper limit value is set based on an assumed use period of the shutter mechanism, the unit period, and the cumulative upper limit value.

(B) The period upper limit value is an upper limit value related to the number of operations per unit time.
(C) The grill shutter device, wherein the period upper limit value is an upper limit value related to the number of actuations per vehicle travel.

According to each of the above configurations, it is possible to suppress the operation of the excessive shutter mechanism more preferably.
(D) A grill shutter device comprising release means capable of releasing the operation restriction of the shutter mechanism. Thereby, a user's convenience can be improved.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Vehicle body, 3 ... Engine room, 7 ... Grill opening part, 10 ... Grill shutter apparatus, 11 ... Shutter mechanism, 12 ... Actuator, 18 ... Motor, 20 ... ECU (control means, measuring means, operation restriction) Means, notification means, end point confirmation means), 23 ... limit switch (end point confirmation means), 25 ... output device (notification means), N ... total number of operations, N0 ... cumulative upper limit value, n ... period operation count, n0 ... period upper limit.

Claims (7)

A grille shutter device comprising: a shutter mechanism capable of controlling a flow rate of air flowing into the vehicle body by opening and closing a grille opening at the front of the vehicle body; and a control means for controlling the operation of the shutter mechanism,
The control means includes
Measuring means for measuring the number of actuations of the shutter mechanism;
A grill shutter device, comprising: an operation limiting means for limiting the operation of the shutter mechanism when the number of operations exceeds an upper limit value. The grill shutter device according to claim 1,
The grille shutter device, wherein the actuating limiting unit limits the operation of the shutter mechanism when the total number of actuations exceeds a cumulative upper limit value. In the grill shutter device according to claim 1 or 2,
The operation limiting means limits the operation of the shutter mechanism until the unit period elapses when the number of operations measured within the unit period exceeds a period upper limit value.
A grill shutter device characterized by the above. In the grill shutter device according to any one of claims 1 to 3,
The shutter mechanism is open when the operation of the shutter mechanism is limited;
A grill shutter device characterized by the above. In the grill shutter device according to any one of claims 1 to 4,
The operation restriction of the shutter mechanism is to prohibit the closing operation of the shutter mechanism,
A grill shutter device characterized by the above. In the grill shutter device according to any one of claims 1 to 5,
The control means includes end point confirmation means capable of confirming that the shutter mechanism has been operated to an end point at which the shutter mechanism is fully opened or fully closed, and it is not confirmed that the shutter mechanism has been operated to the end point after controlling the operation of the shutter mechanism. Is to execute the operation control again,
The operation restriction of the shutter mechanism is to prohibit the re-operation control.
A grill shutter device characterized by the above. In the grill shutter device according to any one of claims 1 to 6,
Providing an informing means for informing operation restriction of the shutter mechanism;
A grill shutter device characterized by the above.