JP7335993B2 - electric shielding device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shielding device that controls movement of a shielding material by driving force of a motor.

The electric shielding device rotates the drive shaft with the driving force of the motor, and the lifting cord (including string-like cord or tape-like lifting tape) is wound up or unwound by the winding drum, thereby moving the shielding material ( For example, it is possible to move up and down).

In such an electric shielding device, a motor is provided in the headbox, rotation of the output shaft of the motor is transmitted to the drive shaft, and the shielding material is raised and lowered based on the rotation of the drive shaft.

In addition, in the electric shielding device, when the rail provided at the lower edge of the shielding material comes into contact with an obstacle during the lowering operation of the shielding material and the lowering becomes impossible, the operation of the motor is stopped and the lifting cord is not used. A film having an obstacle detection stop device for automatically stopping rewinding is known (see, for example, Patent Document 1).

As disclosed in Patent Document 1, in the obstacle detection and stopping device provided in the conventional electric shielding device, the rail provided at the lower edge of the shielding material comes into contact with the obstacle, causing the lifting cord to become slack. It has a detector that slides in the headbox due to its slack, and the movement of the detector activates the microswitch. By detecting the operation of the microswitch, a control device provided in the head box performs "obstacle detection", and the control device "stops" the motor.

In this way, the obstacle detection stop device provided in the conventional electric shielding device is provided with a microswitch that operates according to the tension state of the lifting cord, and the control device monitors the operation of the microswitch to detect the obstacle. detection" and "motor stop". For this reason, the microswitch provided in the obstacle detection/stopping device and the control device are connected by wiring, and the motor and the control device are connected by a motor harness.

JP 2007-177584 A

As disclosed in the above-mentioned Patent Document 1, an obstacle detection stop device provided in a conventional electric shielding device is provided with a microswitch that operates according to the tension state of the lifting cord, and the microswitch is operated by the control device. By monitoring , "obstacle detection" and "stop" of the motor are performed. For this reason, the microswitch provided in the obstacle detection stop device and the control device are connected by a control cord, and the motor and the control device are connected by a motor harness.

By the way, it is also conceivable to adopt a configuration that does not use a microswitch. However, in a configuration that does not use a microswitch, it is necessary to mechanically stop the drive shaft. It will stop as it occurs. That is, if the drive of the motor is maintained in spite of the fact that the drive shaft is mechanically "stopped", there is a risk of waste of electric power, heat generation of the motor, damage, or the like.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an electric shielding device that enables cost reduction and quality improvement in view of the above problems.

An electric shielding device according to one aspect of the present invention is an electric shielding device in which a drive shaft is driven by a motor to rotate a shielding material to move the shielding material. A clutch type obstacle detection stop device that operates to mechanically lock the rotation of the shaft, an encoder that detects the rotation of the motor, and an output value of the encoder that is input and monitored to control the drive of the motor. and a control device, wherein the control device determines the presence or absence of an obstacle only by monitoring the input of the output value of the encoder, and stops driving the motor when it is determined that there is an obstacle from the result of the monitoring. The obstacle detection stop control means temporarily stops the driving of the motor after determining that there is an obstacle based on the result of the monitoring, and the clutch type obstacle The motor is controlled to stop after re-driving the motor in a direction to reversely rotate the drive shaft to a position where the lock of the detection stop device is released or to a predetermined position where the creep load of the drive shaft is released. and

An electric shielding device according to one aspect of the present invention is an electric shielding device in which a drive shaft is driven by a motor to rotate a shielding material to move the shielding material. A clutch type obstacle detection stop device that operates to mechanically lock the rotation of the shaft, an encoder that detects the rotation of the motor, and an output value of the encoder that is input and monitored to control the drive of the motor. and a control device, wherein the control device only monitors one or more abnormal values among overcurrent, abnormal waveform current, and abnormal waveform voltage associated with the driving of the motor that occur when the clutch type obstacle detection and stopping device is activated. and an obstacle detection stop control means for stopping the drive of the motor when it is judged that there is an obstacle from the result of the monitoring, and the obstacle detection stop control means After it is determined that there is an obstacle based on the monitoring results, the drive of the motor is temporarily stopped, and the creep load of the drive shaft is released to the position where the clutch-type obstacle detection stop device is unlocked. It is characterized in that the motor is controlled to stop after re-driving the motor in the direction of rotating the drive shaft in the reverse direction up to a predetermined position.

An electric shielding device according to one aspect of the present invention is an electric shielding device in which a drive shaft is driven by a motor to rotate a shielding material to move the shielding material. A clutch type obstacle detection stop device that operates to mechanically lock the rotation of the shaft, an encoder that detects the rotation of the motor, and an output value of the encoder that is input and monitored to control the drive of the motor. a control device, the control device monitoring the input of the output value of the encoder, and overcurrent, abnormal waveform current and abnormal waveform related to the driving of the motor that occur when the clutch type obstacle detection stop device is operated. One or more abnormal values of the voltage are monitored, and the presence or absence of an obstacle is determined based on whether or not the presence of an obstacle is detected as a result of any one of the monitoring, and the presence or absence of an obstacle is determined from the result of any one of the monitoring. an obstacle detection stop control means for stopping the driving of the motor when it is determined that there is an obstacle; The driving of the motor is temporarily stopped, and the drive shaft is reversely rotated to a position where the clutch-type obstacle detection stop device is unlocked, or to a predetermined position where the creep load of the drive shaft is released. It is characterized by performing control to stop after re-driving the motor.

An electric shielding device according to one aspect of the present invention is an electric shielding device in which a drive shaft is driven by a motor to rotate a shielding material to move the shielding material. A clutch type obstacle detection stop device that operates to mechanically lock the rotation of the shaft, an encoder that detects the rotation of the motor, and an output value of the encoder that is input and monitored to control the drive of the motor. a control device, the control device monitoring the input of the output value of the encoder, and overcurrent, abnormal waveform current and abnormal waveform related to the driving of the motor that occur when the clutch type obstacle detection stop device is operated. One or more abnormal values of the voltage are monitored, the presence or absence of an obstacle is determined based on whether or not the presence of an obstacle is detected in the results of both monitoring, and the presence of an obstacle is determined from the results of both monitoring. and an obstacle detection stop control means for stopping the driving of the motor when it is determined as above, and the obstacle detection stop control means drives the motor after determining that there is an obstacle based on the result of the monitoring. is temporarily stopped, and the motor is re-driven in the direction of reverse rotation of the drive shaft to a position where the clutch-type obstacle detection stop device is unlocked, or to a predetermined position where the creep load of the drive shaft is released. It is characterized by performing control to stop after that.

According to the present invention, it is possible to reduce the cost and improve the quality of the electric shielding device.

(a) and (b) are respectively a plan view and a front view showing a schematic configuration of an electric shielding device according to one embodiment of the present invention. 1(a) is a cross-sectional view showing a schematic configuration of a clutch-type obstacle detection/stopping device provided in an electric shielding device according to an embodiment of the present invention, and FIGS. It is a perspective view which shows operation|movement of the clutch-type obstacle detection stop apparatus provided in the electric shielding apparatus of embodiment. 1 is a block diagram showing a schematic configuration of a control device in an electric shielding device of one embodiment according to the present invention; FIG. 4 is a flow chart showing obstacle detection stop control of Example 1 of the control device in the electric shielding device of one embodiment according to the present invention. 9 is a flow chart showing obstacle detection stop control of Example 2 of the control device in the electric shielding device of one embodiment according to the present invention. 9 is a flow chart showing obstacle detection stop control of Example 3 of the control device in the electric shielding device of one embodiment according to the present invention. 10 is a flow chart showing obstacle detection stop control of Example 4 of the control device in the electric shielding device of one embodiment according to the present invention.

An electric shielding device according to an embodiment of the present invention will be described below with reference to the drawings. In the specification of the present application, with respect to the front view of the electric shielding device shown in FIG. ), the left direction in the drawing is defined as the left side of the electric shielding device, and the right direction in the drawing is defined as the right side of the electric shielding device. In addition, in the examples described below, with respect to the front view of the electric shielding device shown in FIG. 1, the side to be visually recognized is the front side (or indoor side), and the opposite side is the rear side (or outdoor side).

(overall structure)
1(a) and 1(b) are respectively a plan view and a front view showing a schematic configuration of an electric shielding device according to one embodiment of the present invention. As a representative example of the electric shielding device shown in FIG. 1, an electric pleated screen for raising and lowering a shielding material is shown. However, if the shielding material is moved by the rotation of the drive shaft, it is not necessary to be limited to this. For example, an electric horizontal blind, an electric vertical blind, or an electric curtain may be used.

In the electric pleated screen of one embodiment shown in FIGS. 1(a) and 1(b), an upper screen 6U as an upper shielding material and a lower shielding material that can be individually lifted and lowered by a plurality of types of lifting cords 3U and 3L. Although it is configured to include the lower screen 6L, it may be an electric pleated screen in which a kind of shielding material can be raised and lowered by a kind of lifting cord.

In the electric pleated screen of one embodiment shown in FIGS. 1(a) and 1(b), an upper screen 6U that can be bent in a zigzag shape is suspended from a head box 1, and the lower end of the screen 6U is connected to an intermediate rail 4. Attached to the top surface. The headbox 1 is fixed via a bracket 15 to a mounting surface such as a ceiling surface.

The lower surface of the intermediate rail 4 is attached with the upper end of a lower screen 6L which can also be bent in a zigzag shape, and the lower end of the lower screen 6L is attached with the bottom rail 7.

Winding drums 51A and 51B are rotatably supported in parallel in the front-rear direction with respect to respective support members 5 disposed at appropriate positions (two positions on the left and right in this example) within the head box 1 . Cam clutches 52A and 52B are provided at one axial ends of the winding drums 51A and 51B, respectively. Each winding drum 51A and cam clutch 52A, and each winding drum 51B and cam clutch 52B are configured in the same shape.

Each winding drum 51A has an upper end of the lifting cord 3L (in this example, it is a cord-like cord, but a tape-like lifting tape may also be used) which is wound or rewound and attached to the lifting cord 3L. The lower end passes through the upper screen 6U, the intermediate rail 4, and the lower screen 6L in this example and is attached to the bottom rail 7. As shown in FIG. The winding drum 51A is formed so that the diameter gradually becomes smaller toward one side in the axial direction, and in this example, the string-like lifting cord 3L is spirally wound sequentially around the winding drum 51A. there is

Each winding drum 51B has an upper end of a lifting cord 3U (a cord-like cord in this example, but may be a tape-like lifting tape) attached so that it can be wound or rewound. The lower end of 3U passes through the upper screen 6U in this example and is attached to the intermediate rail 4 . The winding drum 51B is formed such that its diameter gradually decreases toward one side in the axial direction, and in this example, the string-like lifting cord 3U is spirally wound sequentially around the winding drum 51B. there is

A drive shaft 2A is inserted through the center shafts of the winding drum 51A and the cam clutch 52A, and the cam clutch 52A transmits the rotation of the drive shaft 2A to the winding drum 51A and drives the driving force of the winding drum 51A. It is adapted to be transmitted to the shaft 2A.

Similarly, the drive shaft 2B is inserted through the central shafts of the winding drum 51B and the cam clutch 52B, and the cam clutch 52B transmits the rotation of the drive shaft 2B to the winding drum 51B and drives the winding drum 51B. It is adapted to transmit force to the drive shaft 2B.

One end of the drive shaft 2A is connected to the output shaft of the motor 9A via the drive shaft coupler 20A, and the rotation of the output shaft of the motor 9A is transmitted to the drive shaft 2A. Therefore, the drive shaft 2A is rotated by the driving force of the motor 9A, and the lifting cord 3L is wound up or unwound by the winding drum 51A based on the rotation of the drive shaft 2A, whereby the bottom rail 7 can be moved up and down. As a result, the lower screen 6L can be raised and lowered, and the upper screen 6U and the intermediate rails 4 can be raised and lowered. Incidentally, since the winding drum 51A utilizes the tension (the weight of each screen and each rail) associated with the lifting cord 3L when the lower screen 6L is lowered, the driving force is applied to the winding drum 51A via the cam clutch 52A. is transmitted to the drive shaft 2A, and the descent is controlled by adjusting the driving force associated with the drive shaft 2A.

One end of the drive shaft 2B is connected to the output shaft of the motor 9B via the drive shaft coupler 20B, and the rotation of the output shaft of the motor 9B is transmitted to the drive shaft 2B. Therefore, the drive shaft 2B is rotated by the driving force of the motor 9B, and the lifting cord 3U is wound up or unwound by the winding drum 51B based on the rotation of the drive shaft 2B. Thereby, the upper screen 6U can be raised and lowered. In addition, since the winding drum 51B utilizes the tension (the weight of the upper screen 6U and the intermediate rail 4) associated with the lifting cord 3U when the upper screen 6U is lowered, the driving force of the winding drum 51B is transmitted through the cam clutch 52B. It is transmitted from the drum 51B to the drive shaft 2A, and is controlled to descend by adjusting the driving force associated with the drive shaft 2B.

Drive control of each of the motors 9A and 9B is performed by a control device 10 arranged in the headbox 1. FIG. A DC power supply 11 for supplying power to the motors 9A and 9B and the control device 10 is arranged in the headbox 1 . When receiving an operation signal from an external device (not shown) such as a wired switch 21, a wireless remote controller 22, an infrared remote controller 23, or a personal computer (PC), the control device 10 responds to various commands included in the operation signal. Performs various controls for the corresponding electric shielding device. For example, by configuring the motors 9A and 9B as DC motors respectively, by controlling the duty ratio of the pulse signal supplied from the control device 10 to the motors 9A and 9B, the control device 10 controls the rotational speeds of the motors 9A and 9B. can be controlled. Encoders 8A and 8B for detecting the rotational speed and amount of rotation of the drive shafts 2A and 2B are provided in the head box 1, and the controller 10 responds to the pulse signals output from the encoders 8A and 8B. Based on this, the rotation speed and rotation amount of the motors 9A and 9B are controlled by managing the speed of the encoder pulses and the count value of the number of pulses. With such an operation, the control device 10 appropriately adjusts the lifting speed of the upper screen 6U or the lower screen 6L, corresponding to various commands included in the operation signal, and It controls the elevation stop position of the screen 6L.

In the electric pleated screen of this embodiment configured in this way, the intermediate rail 4 is pulled up to directly below the headbox 1, and the bottom rail is folded in a state where the upper screen 6U is folded between the headbox 1 and the intermediate rail 4. 7 is lowered, the lower screen 6L is suspended from the headbox 1. As shown in FIG.

Further, when the intermediate rail 4 is lowered above the bottom rail 7 while the bottom rail 7 is lowered to the lower limit, the lower screen 6L is folded between the intermediate rail 4 and the bottom rail 7, and the head box 1 and the intermediate rail 7 are folded. The upper screen 6U is suspended and supported between the rails 4.例文帳に追加Therefore, for example, if the upper screen 6U is made of a light-receiving material and the lower screen 6L is made of a light-shielding material, it is possible to increase the degree of freedom in adjusting the amount of light.

By lowering the bottom rail 7 to the lower limit and positioning the intermediate rail 4 between the head box 1 and the bottom rail 7, it is possible to receive soft light transmitted through the upper screen 6U made of light-receiving fabric. can.

When the bottom rail 7 is pulled up to the upper limit and opened, the bottom rail 7 is pulled up without pulling up the intermediate rail 4, and the upper screen 6U and the lower screen 6L are folded between the head box 1 and the bottom rail 7. state.

(Clutch-type obstacle detection and stopping device)
By the way, when the intermediate rail 4 or the bottom rail 7 comes into contact with an obstacle and its descent is prevented, a clutch-type obstacle detecting and stopping device is actuated to lock the drive shaft 2A or 2B. That is, when the intermediate rail 4 or the bottom rail 7 comes into contact with an obstacle, the winding drum 51A and cam clutch 52A, and the winding drum 51B and cam clutch 52B, which are supported by the support member 5, act as "obstacles" against each rail. It functions as a clutch-type obstacle detection stop device that mechanically performs "object detection" and "stop" of each drive shaft. That is, the winding drum 51A and the cam clutch 52A supported by the supporting member 5, and the winding drum 51B and the cam clutch 52B are configured as a clutch-type obstacle detecting/stopping device as shown in FIG.
A clutch-type obstacle detecting and stopping device will be briefly described below.

The winding drum 51B and the cam clutch 52B have the same structures as the winding drum 51A and the cam clutch 52A, respectively. 4 shows a cross-sectional view of the configuration of the winding drum 51A and the cam clutch 52A functioning as a clutch-type obstacle detecting and stopping device.

As shown in FIG. 2(a), in the clutch type obstacle detection and stopping device, a winding drum 51A and a cam clutch 52A are supported by a support portion 50 of a support member 5, and the cam clutch 52A rotates a rotating drum 53. It is connected to the winding drum 51A via.

The support member 5 is fixed by fitting a snap fit 501 projecting from the bottom surface of the support member 5 to the head box 1 . The cam clutch 52A, the rotating drum 53, and the winding drum 51A are rotatably supported between through holes 502 and 503 formed at both left and right ends of the support portion 50. As shown in FIG. More specifically, the cylindrical portion 521 of the cam clutch 52A is rotatably supported in the through hole 502, and the pulley cap 54 fitted to the right end of the winding drum 51A in the drawing is rotatable in the through hole 503. pivoted.

The snap fit 501 is formed with an outlet through which the lifting cord 3L is wound up or unwound from a predetermined position. A damping projection 504 is formed on the bottom surface of the left side of the support portion 50 in the drawing.

The winding drum 51</b>A is formed in a substantially cylindrical shape and includes an engaging portion 511 and a winding portion 512 .

The winding portion 512 of the winding drum 51A is set so that its diameter gradually decreases from the cam clutch 52A side toward the right end side in the drawing. A drive shaft 2A passes through the center of a pulley cap 54 fitted to the right end of the winding drum 51A so as to be relatively rotatable.

A cam clutch 52A is accommodated radially inside the engaging portion 511 of the winding drum 51A. The cam clutch 52A has a substantially cylindrical cylindrical portion 521 and a braking portion 522 having a diameter larger than that of the cylindrical portion 521 .

The diameter of the outer peripheral surface of the braking portion 522 is set to be large enough to slide on the inner peripheral surface of the engaging portion 511 of the winding drum 51A. One or a plurality of braking claws 523 are protruded in a sawtooth shape at the end of the braking portion 522 on the cylindrical portion 521 side, and are engageable with the braking projections 504 of the support portion 50 .

When the braking pawl 523 is prevented from rotating in the circumferential direction by being engaged with the braking projection 504, the cam clutch 52A is rendered non-rotatable relative to the support portion 50. As shown in FIG.

The side wall of the braking portion 522 of the cam clutch 52A has a predetermined rotational play with the winding drum 51A through the rotating drum 53, and is assembled so as not to rotate relative to the winding drum 51A. It has a cam structure that makes it relatively movable (slidable) along the direction.

That is, a sliding hole 524 as a cam structure is formed in the side wall of the braking portion 522 of the cam clutch 52A. ing. Further, the length of the sliding hole 524 is set so that the sliding hole 524 is arranged over an angular range of approximately 45° in the circumferential direction of the braking portion 522 .

The rotating drum 53 is formed with a sliding projection 531 projecting radially outward. The rotating drum 53 is assembled to the cam clutch 52A so that the sliding protrusions 531 are positioned inside the sliding holes 524 of the cam clutch 52A. Relative movement is possible only within the range of relative movement inside the .

Specifically, when the sliding protrusion 531 is positioned at one end of the sliding hole 524, the cam clutch 52A is positioned closest to the take-up pulley 9 (right side in FIG. 2(a)). The engagement state between 523 and braking projection 504 is released. On the other hand, when the sliding convex portion 531 is positioned at the other end of the sliding hole 524, the cam clutch 52A slides in the axial direction to the side closest to the take-up pulley 9 (left side in FIG. 2(a)). As a result, the braking pawl 523 and the braking protrusion 504 are engaged.

When the braking claws 523 and the braking projections 504 are engaged with each other, the rotation of the cam clutch 52A is prevented, and the sliding projections 531 moved to the other end of the sliding hole 524 are prevented from rotating further. rotation of the rotary drum 53 is stopped, and the rotation of the drive shaft 2A connected to the rotary drum 53 so as not to rotate relative thereto is also stopped.

Therefore, when the cam clutch 52A relatively moves in the axial direction of the winding drum 51A and the braking pawl 523 is engaged with the braking convex portion 504, the cam clutch 52A is locked to the support portion 50 so as not to rotate relative to it. be. Further, when the engagement state between the braking claw 523 and the braking projection 504 is released, the cam clutch 52A becomes rotatable relative to the support portion 50. As shown in FIG.

A rotating drum 53 is accommodated radially inside the cam clutch 52A. The rotating drum 53 has a substantially cylindrical shape, has a predetermined rotational play with respect to the winding drum 51A, and cannot rotate relative to the winding drum 51A. It is worn as Further, the drive shaft 2A penetrates through the cylindrical portion 515 so as to be relatively rotatable, and the rotating drum 53 rotates integrally with the drive shaft 2A.

Thus, when the drive shaft 2A is rotated in the direction of pulling up the shielding material (lower screen 6L), the rotation is transmitted to the rotating drum 53. As shown in FIG. At this time, the rotating drum 53 is rotated relative to the winding drum 51A and the cam clutch 52A during the predetermined rotational play.

In this case, the engagement state between the braking claws 523 of the cam clutch 52A and the braking projections 504 of the support portion 50 is released, and the cam clutch 52A can rotate relative to the support portion 50. FIG. Then, the rotating drum 53 becomes unable to rotate relative to the cam clutch 52A and the winding drum 51A when the rotating drum 53 rotates beyond the predetermined rotational play.

Therefore, when the drive shaft 2A is further rotated in the lifting direction, the rotating drum 53 is rotated in the lifting direction integrally with the cam clutch 52A and the winding drum 51A, and the shielding material (lower screen 6L) is driven to be lifted. will be

On the other hand, when the drive shaft 2A pulls down the shielding material (lower screen 6L), the weight of the lower screen 6L and the bottom rail 7 is used to pull down the drive shaft 2A. transmitted towards.

When the winding drum 51A and the cam clutch 52A are rotated in the pull-down direction, the engagement state between the braking claws 523 of the cam clutch 52A and the braking projections 504 of the support parts 50 is released. And the drive shaft 2A is immediately rotated in the pull-down direction.

Here, FIGS. 2(b) to 2(e) show the state shown in FIG. ), the operation of the winding drum 51A and the cam clutch 52A functioning as a clutch-type obstacle detection and stopping device are schematically illustrated. 2(d) and 2(e), one braking pawl 523 is simply illustrated, but a plurality of braking pawl 523 may be provided.

First, when the shielding material (lower screen 6L) is being pulled down as shown in FIG. It is returned and the lower screen 6L descends. The lifting cord 3L wound around the winding drum 51A is under tension in the pull-out direction due to the weight of the bottom rail 7 and the like. Rotation control controls its own weight rotation. At this time, the sliding projection 531 is positioned at one end of the sliding hole 524, and the cam clutch 52A is positioned closest to the take-up pulley 9 (right side in FIG. 2(a)). The engagement state with the braking protrusion 504 is released.

As shown in FIG. 2(c), when the bottom rail 7 collides with an obstacle, tension in the pull-out direction of the lifting cord 3L is lost, and the winding drum 51A stops rotating. And the drive shaft 2A maintains its rotation, so a rotation difference occurs. However, the rotating drum 53 is rotated relative to the winding drum 51A only during the predetermined rotational play.

Then, the sliding projection 531 is guided by the sliding hole 524, and as shown in FIG. The cam clutch 52A starts relative movement (sliding) in the axial direction while rotating.

Then, as shown in FIG. 2(e), the braking pawl 523 of the cam clutch 52A is engaged with the braking convex portion 504 during the passage of the predetermined rotational play of the rotating drum 53 as the winding drum 51A stops rotating. As a result, rotation in the circumferential direction is prevented, and the cam clutch 52A is made non-rotatable relative to the support portion 50. As shown in FIG. Rotation of the cam clutch 52A is blocked, and the sliding protrusion 531, which has been moved to the other end of the sliding hole 524, cannot rotate any more. The rotation of the drive shaft 2A, which is non-rotatably connected to , also stops. In this manner, the cam clutch 52A is rendered non-rotatable relative to the support portion 50, and when the predetermined rotational play of the rotating drum 53 elapses, the rotation of the rotating drum 53 also stops, and the rotation of the drive shaft 2A is locked.

In the example shown in FIG. 2, the cam clutch 52A is assembled so that the side wall of the braking portion 522 has a predetermined rotational play with the winding drum 51A through the rotating drum 53 so as not to rotate relative to the winding drum 51A. A cam structure that allows relative movement (sliding) along the axial direction by guiding the sliding protrusions 531 formed on the rotating drum 53 through the sliding holes 524 formed in the cam clutch 52A within the range of play. However, the cam structure for mechanically locking the drive shaft 2A is not limited to this example. Various forms are conceivable as long as it is a cam clutch structure that stops immediately.

For example, instead of the rotating drum 53 and the cam clutch 52A, a cam clutch formed with a braking claw 523 that can be engaged with the braking projection 504 and a sliding projection 531 may be configured, and the cam clutch may be installed inside the winding drum 51A. It can be configured to be supported by a peripheral wall. In this case, the cam clutch is configured to be non-rotatable relative to the drive shaft 2A but to allow relative movement (sliding movement) relative to the winding drum 51A in the axial direction within a predetermined range. In order to rotate the portion 531 in the same manner as the operation illustrated in FIG. 2, a cam clutch structure may be employed in which sliding grooves corresponding to the sliding holes 524 are formed in the inner peripheral wall of the winding drum 51A.

However, when the drive shaft 2A is mechanically locked in this way, the rotation control of the drive shaft 2A is continued, so a load is applied to the drive shaft 2A, and the motor stops with the load applied. That is, if the drive of the motor 9A is maintained even though the drive shaft 2A is mechanically "stopped", there is a risk of waste of electric power, heat generation of the motor 9A, or damage to the motor 9A. occur.

In summary, the drive shaft 2A is inserted through the center shafts of the winding drum 51A and the cam clutch 52A, and whenever the drive shaft 2A rotates (when an obstacle is not detected), most of the cam clutch 52A is taken up. The cam clutch 52A, which is housed radially inside the drum 51A and engages with the drive shaft 2A, rotates in the same direction, and utilizes the tension (the weight of each screen and each rail) associated with the lifting cord 3L. Meanwhile, the winding drum 51A engaged with the cam clutch 52A rotates in the same direction. As a result, the lifting cord 3L can be wound or rewound by the winding drum 51A, and the bottom rail 7 can be moved up and down.

However, if there is an obstacle on the descending bottom rail 7, a rotation difference occurs between the rotation of the drive shaft 2A and the rotation of the winding drum 51A, and relative rotation between the rotation of the winding drum 51A and the drive shaft 2A is blocked. , part of the cam clutch 52A, which had been mostly accommodated radially inside the winding drum 51A, slides so as to protrude from the winding drum 51A in the axial direction of the drive shaft 2A. The braking claws 523 of the cam clutch 52A, which slides and protrudes from the winding drum 51A, engage with the braking projections 504 formed on the support member 5 that rotatably supports the winding drum 51A. It mechanically prevents (locks) the rotation of the drive shaft 2A. Considering the time when the obstacle disappears, the control device 10 accommodates most of the cam clutch 52A inside the winding drum 51A in the radial direction to mechanically prevent the rotation of the drive shaft 2A. Control is performed so that the drive shaft 2A is reversely rotated in the upward direction of the bottom rail 7 to the extent that the blocking state is released, and then stopped.

Similarly, the drive shaft 2B is inserted through the central shafts of the winding drum 51B and the cam clutch 52B, and whenever the drive shaft 2B rotates (when an obstacle is not detected), most of the cam clutch 52B is engaged with the winding drum. 51B, the cam clutch 52B engaged with the drive shaft 2B rotates in the same direction, and furthermore, the tension on the lifting cord 3U (the weight of the upper screen 6U and the intermediate rail 4) is released. The winding drum 51B engaged with the cam clutch 52B rotates in the same direction while being utilized. As a result, the lifting cord 3U can be wound up or unwound by the winding drum 51B, and the intermediate rail 4 can be moved up and down.

However, if there is an obstacle on the descending intermediate rail 4, the lifting cord 3U is slackened, and if the lifting cord 3U is slackened, a difference in rotation occurs between the rotation of the drive shaft 2B and the rotation of the winding drum 51B, resulting in rotation. Due to the relative rotation between the winding drum 51B and the drive shaft 2B, the cam clutch 52B, which was mostly accommodated radially inward of the winding drum 51B, is partially moved to the winding drum. It slides so as to protrude from 51B in the axial direction of the drive shaft 2B. The braking claws 523 of the cam clutch 52B, which slides and protrudes from the winding drum 51B, engage with the braking protrusions 504 formed on the support member 5 that rotatably supports the winding drum 51B. It mechanically prevents (locks) the rotation of the drive shaft 2B. Considering the time when the obstacle disappears, the control device 10 accommodates most of the cam clutch 52B inside the winding drum 51B in the radial direction to mechanically prevent the rotation of the drive shaft 2B. Control is performed such that the drive shaft 2B is reversely rotated in the ascending direction of the intermediate rail 4 to the extent that the blocked state is released, and then stopped.

Therefore, the electric pleated screen configured as the electric shielding device of the present embodiment is provided with a clutch-type obstacle detection/stop device that mechanically "detects an obstacle" for each rail and "stops" each drive shaft. be done.

By the way, in the electric shielding device of the present embodiment, each of the motors 9A and 9B and the control device 10 are connected by motor harnesses, but the respective winding drums 51A and cam clutches 52A supported by the respective support members 5, In addition, since each winding drum 51B and cam clutch 52B are configured as a clutch-type obstacle detection/stop device, the microswitch disclosed in Patent Document 1 is not required.

However, in a configuration that does not require the microswitch, the control device 10 needs to detect the mechanical "stop" by the clutch-type obstacle detection stop device and stop driving the motors 9A and 9B. . That is, if the driving of the motors 9A and 9B is maintained in spite of the fact that the mechanical "stop" of the drive shafts 2A and 2B is in operation, power is wasted, heat is generated in the motors 9A and 9B, or In order to avoid these problems, the control device 10 according to the present embodiment solves this problem by the following configuration and the obstacle detection stop control of each example.

(Configuration of control device)
FIG. 3 is a block diagram showing a schematic configuration of the control device 10 in the electric shielding device of one embodiment according to the present invention.

When the control device 10 receives an operation signal from an external device such as a wired switch 21, a wireless remote controller 22, an infrared remote controller 23, or a personal computer (PC) 24, the controller 10 operates an electric motor corresponding to various commands included in the operation signal. Performs various controls for the shielding device. For example, the control device 10 manages the speed of the encoder pulse from the encoder 12 and the count value of the number of pulses, controls the rotation speed and rotation amount of the motors 9A and 9B, and raises and lowers each shielding material (each screen and each rail). It adjusts the speed as appropriate and controls the vertical stop position of each shielding material.

The wired switch 21 is an operation switch that outputs an operation signal to the control device 10 by being wired to the control device 10 .

The infrared remote controller 23 is a remote controller that outputs an operation signal to the control device 10 by wirelessly connecting to the control device 10 using infrared rays.

The wireless remote controller 22 is a remote controller that outputs an operation signal to the control device 10 by wirelessly connecting to the control device 10 via a wireless LAN (including short-range wireless communication).

A personal computer (PC) 24 outputs an operation signal to the control device 10 by connecting to the control device 10 by wire (or by connecting wirelessly via a wireless LAN).

Here, the operation signals include a rise command that instructs the upward operation of each shielding material (each screen and each rail), a descending command that instructs the downward operation of each shielding material, and a stop that instructs the lifting operation of each shielding material to stop. command, and a command for setting the upper and lower limit positions of each shielding material. In addition, various commands for instructing the elevation of each shielding material can be associated with a "% instruction operation" indicating the degree of opening ratio of each shielding material.

3, the control device 10 includes a microcomputer section 101, a storage section 102, an infrared signal receiving section 103, a radio signal transmitting/receiving section 104, a wired signal transmitting/receiving section 105, an external equipment interface (IF) section 106, It includes motor drive units 107a and 107b, abnormality detection units 108a and 108b, and pulse detection units 109a and 109b.

The infrared signal receiving section 103 is a functional section that receives an operation signal from the infrared remote controller 23 and outputs it to the microcomputer section 101 .

The radio signal transmission/reception unit 104 is a functional unit that receives an operation signal from the radio remote controller 22 and outputs it to the microcomputer unit 101. The microcomputer unit 101 and the radio remote controller 22 can communicate with each other, and the details of the operation are transmitted. commands can be exchanged.

The wired signal transmission/reception unit 105 is a functional unit that receives an operation signal from the wired switch 21 and outputs it to the microcomputer unit 101 .

An external device interface (IF) unit 106 is a functional unit that receives an operation signal from an external device such as the PC 24 and outputs it to the microcomputer unit 101. It enables mutual communication between them, enabling the exchange of detailed commands related to operations.

The motor drive units 107a and 107b are motor drivers that drive the motors 9A and 9B, respectively.

Abnormality detection units 108a and 108b are functional units that detect abnormal values (one or more of overcurrent/abnormal waveform current/abnormal waveform voltage) in motor drive units 107a and 107b, respectively, and notify microcomputer unit 101 of the abnormal values. .

The pulse detection units 109a and 109b are functional units that receive pulse signals from the encoders 8A and 8B, respectively, and notify the microcomputer unit 101 of them.

The microcomputer unit 101 reads out and executes a program stored in advance in the storage unit 102 , thereby receiving operation signals from the infrared remote controller 23 via the infrared signal receiving unit 103 and wireless signal transmitting/receiving unit 104 . an operation signal from the wireless remote controller 22, an operation signal from the wired switch 21 received via the wired signal transmission/reception unit 105, or an operation signal from an external device such as the PC 24 received via the external device IF unit 106. , processes various commands contained in the operation signal. Thereby, the control device 10 that performs various controls of the electric shielding device can be configured as a computer.

The functions of the control device 10 realized by executing the program by the microcomputer unit 101 include receiving an operation signal, discriminating various commands contained in the operation signal, and performing various controls of the corresponding electric shielding device. While counting the presence or absence of encoder pulses and the number of encoder pulses through pulse detection units 109a and 109b that respectively receive pulse signals from encoders 8A and 8B, the count value is stored in storage unit 102 as appropriate. a function to store and manage various settings related to the upper limit setting position and lower limit setting position of each shielding material that can be set according to the count value of the number of encoder pulses in the storage unit 102; driving the motors 9A and 9B function to drive and control the motors 9A and 9B via the motor drive units 107a and 107b, respectively, and abnormal values in the motor drive units 107a and 107b (one or more of overcurrent/abnormal waveform current/abnormal waveform voltage ) are detected and notified to the microcomputer unit 101, the abnormal values are monitored through the abnormality detection units 108a and 108b.

Hereinafter, the obstacle detection stop control of each embodiment performed by the microcomputer section 101 in the control device 10 will be described in order. Further, in the description of each embodiment, representatively, the output of the encoder 8A is monitored, the drive shaft 2A is rotated by the driving force of the motor 9A, and the lifting cord 3L is moved to the winding drum based on the rotation of the drive shaft 2A. Obstacle detection stop control when the lower screen 6U and the bottom rail 7 are lowered by winding or rewinding at 51A will be described. The same is true when performing detection stop control.

(Obstacle detection stop control of embodiment 1)
FIG. 4 is a flow chart showing obstacle detection stop control of Example 1 of the control device in the electric shielding device of one embodiment according to the present invention. In the obstacle detection stop control of the first embodiment, the obstacle detection stop control is performed by the microcomputer section 101 of the control device 10 based on the presence or absence of the encoder pulse output from the encoder 8A via the pulse detection section 109a. Yes, in this embodiment, the control device 10 does not have to include the abnormality detection units 108a and 108b.

First, the control device 10 causes the microcomputer section 101 to start drive control of the motor 9A in response to the reception of the lowering command, thereby starting the lowering operation of the shielding material (the lower screen 6U and the bottom rail 7 in this example). (Step S1).

With the start of the lowering operation of the shielding material, the control device 10 causes the microcomputer section 101 to start counting encoder pulses output from the encoder 8A via the pulse detection section 109a (step S2).

Subsequently, the control device 10 uses the microcomputer section 101 to monitor whether or not there is an encoder pulse input from the encoder 8A via the pulse detection section 109a (step S3). (Step S3: No), the process proceeds to step S4, and when there is no encoder pulse input (step S3: Yes), the process proceeds to step S6.

When there is an encoder pulse input (step S3: No), it is assumed that the clutch type obstacle detection stop device related to the drive shaft 2A is not mechanically "stopped", and the control device 10 The microcomputer unit 101 monitors whether or not the lower limit set position has been reached without receiving a stop command (step S4). When the lower limit position has not been reached without a stop command (step S4: No) , the process proceeds to step S3, and when a stop command is received or when the lower limit setting position is reached (step S4: Yes), the drive control of the motor 9A is stopped, and the lowering operation of the shielding material is stopped. (Step S5).

On the other hand, when there is no encoder pulse input (step S3: Yes), it is assumed that the drive shaft 2A is mechanically "stopped" by the clutch-type obstacle detection stop device, and the control device 10 , the microcomputer unit 101 stops driving control of the motor 9A and stops the lowering operation of the shielding material (step S6). By incorporating the control of steps S2 and S3, it is possible to grasp the mechanical "stop" by the clutch-type obstacle detection stop device related to the drive shaft 2A and stop the drive of the motor 9A. 1, it is possible to reduce costs and improve quality under the configuration that does not require the microswitches disclosed in 1.

After that, the control device 10 causes the microcomputer unit 101 to automatically raise the shielding material at least to a position for unlocking the obstacle detection/stopping device (step S7). The drive control of 9A is stopped, and the upward movement of the shielding material is stopped (step S8). By incorporating the control of steps S7 and S8, the creep load of the drive shaft 2A (the load due to the sustained stress applied to the drive shaft 2A) can be alleviated, thereby also improving the quality.

As described above, under the configuration in which the microswitch disclosed in Patent Document 1 is not required by the obstacle detection stop control of the first embodiment, the control device 10 can perform the clutch-type obstacle detection related to the drive shaft 2A. A mechanical "stop" by the stop device can be grasped and the driving of the motor 9A can be stopped. It can be grasped, the drive of the motor 9B can be stopped, and the creep load can be alleviated. As a result, in the electric shielding device according to the present embodiment, a microswitch as disclosed in Patent Document 1 is not required, and wiring from the microswitch to the control device 10 and It also eliminates the need for a detection circuit that detects the operation of the microswitch, enabling quality improvement. In other words, the obstacle detection/stop control of the first embodiment reduces the load on the drive shaft even when the drive shaft is mechanically locked only by the function of the clutch-type obstacle detection/stop device. Waste, heat generation of the motor, damage, etc. can be avoided.

In addition, in an obstacle detection stop device that functions via a microswitch in the conventional technique, compared to an obstacle detection stop device in a shielding device such as a manually operated blind, the microswitch parts, from the microswitch to the control device wiring, and a detection circuit for detecting the operation of the microswitch in the control device are required, and there is also a problem that the cost of parts and production increases. Furthermore, when a dedicated switch or sensor is provided to detect the upper limit position or the lower limit position of the shielding material, a detection circuit is also required to detect the operation, which increases the cost of parts and production. There is also In the electric shielding device according to this embodiment, these problems can also be solved.

(Obstacle detection stop control of Example 2)
FIG. 5 is a flow chart showing obstacle detection stop control of Example 2 of the control device in the electric shielding device of one embodiment according to the present invention. In the obstacle detection stop control of the second embodiment, the microcomputer unit 101 in the control device 10 detects an abnormal value (at least one of overcurrent/abnormal waveform current/abnormal waveform voltage) in the motor driving unit 107a via the abnormality detection unit 108a. ) is detected to perform obstacle detection stop control, and is the same as the first embodiment shown in FIG. 4 except that steps S2 and S3 are replaced with steps S2a and S3a, respectively. .

First, the control device 10 causes the microcomputer section 101 to start drive control of the motor 9A in response to the reception of the lowering command, thereby starting the lowering operation of the shielding material (the lower screen 6U and the bottom rail 7 in this example). (Step S1). Also in this example, when the shielding material starts to descend, the control device 10 starts counting the encoder pulses output from the encoder 8A via the pulse detection section 109a by the microcomputer section 101. Illustration is omitted because it is not used to grasp the mechanical "stop" by the clutch-type obstacle detection stop device.

With the start of the lowering operation of the shielding material, the control device 10 causes the microcomputer unit 101 to detect whether or not there is an abnormality in the current or voltage related to the motor drive or the drive waveform, that is, the motor drive unit 107a via the abnormality detection unit 108a. (at least one of overcurrent/abnormal waveform current/abnormal waveform voltage) is monitored (step S2a).

Then, if there is no abnormal value (one or more of overcurrent/abnormal waveform current/abnormal waveform voltage) in the motor drive unit 107a via the abnormality detection unit 108a, the control device 10 detects (step S3a : No), the process proceeds to step S4, and when there is the abnormal value (step S3a: Yes), the process proceeds to step S6.

When there is no abnormal value (step S3a: No), it is assumed that the mechanical "stop" by the clutch-type obstacle detection stop device relating to the drive shaft 2A is not performed, and the control device 10 The computer unit 101 monitors whether or not the lower limit set position has been reached without receiving a stop command (step S4). When the lower limit position has not been reached without a stop command (step S4: No), Moving to step S3a, when the stop command is received or when the lower limit setting position is reached (step S4: Yes), the drive control of the motor 9A is stopped, and the lowering operation of the shielding material is stopped ( step S5).

On the other hand, when there is the abnormal value (step S3a: Yes), it is considered that the mechanical "stop" by the clutch type obstacle detection stop device related to the drive shaft 2A is being performed, and the control device 10 , the microcomputer unit 101 stops driving control of the motor 9A and stops the lowering operation of the shielding material (step S6). By incorporating the control of steps S2a and S3a, it is possible to grasp the mechanical "stop" of the clutch-type obstacle detection stop device related to the drive shaft 2A and stop the driving of the motor 9A. 1, it is possible to reduce costs and improve quality under the configuration that does not require the microswitches disclosed in 1.

After that, the control device 10 causes the microcomputer unit 101 to automatically raise the shielding material at least to a position for unlocking the obstacle detection/stopping device (step S7). The drive control of 9A is stopped, and the upward movement of the shielding material is stopped (step S8). By incorporating the control of steps S7 and S8, the creep load of the drive shaft 2A (the load due to the sustained stress applied to the drive shaft 2A) can be alleviated, thereby also improving the quality.

As described above, under the configuration in which the microswitch disclosed in Patent Document 1 is not required by the obstacle detection stop control of the second embodiment, the control device 10 can detect the clutch-type obstacle related to the drive shaft 2A. A mechanical "stop" by the stop device can be grasped and the driving of the motor 9A can be stopped. It can be grasped, the drive of the motor 9B can be stopped, and the creep load can be alleviated. This makes it possible to improve the quality, eliminate the need for a microswitch as disclosed in Patent Document 1, and wire from the microswitch to the control device 10 and connect the microswitch to the control device 10. It is possible to configure an electric shielding device and its control device 10 which eliminates the need for a detection circuit for detecting the operation and reduces the costs associated with parts and production.

(Obstacle detection stop control of Example 3)
FIG. 6 is a flow chart showing obstacle detection stop control of Example 3 of the control device in the electric shielding device of one embodiment according to the present invention. In the obstacle detection stop control of the third embodiment, the microcomputer unit 101 in the control device 10 detects the presence or absence of the encoder pulse output from the encoder 8A via the pulse detection unit 109a, and the motor drive unit via the abnormality detection unit 108a. 107a (one or more of overcurrent/abnormal waveform current/abnormal waveform voltage) are respectively detected to perform obstacle detection stop control. Compared with the second embodiment shown in FIG. It is the same except that S2a and S3a are replaced with steps S2b and S3b, respectively.

First, the control device 10 causes the microcomputer section 101 to start drive control of the motor 9A in response to the reception of the lowering command, thereby starting the lowering operation of the shielding material (the lower screen 6U and the bottom rail 7 in this example). (Step S1).

With the start of the lowering operation of the shielding material, the control device 10 causes the microcomputer section 101 to start counting the encoder pulses output from the encoder 8A via the pulse detection section 109a. The presence or absence of an abnormality in the current or voltage or drive waveform, that is, the abnormal value (one or more of overcurrent/abnormal waveform current/abnormal waveform voltage) in the motor driving unit 107a is monitored via the abnormality detection unit 108a (step S2b). .

Then, when the microcomputer unit 101 detects neither "no encoder pulse input" from the encoder 8A nor "abnormal value present" in the motor drive unit 107a via the abnormality detection unit 108a, (Step S3b: No), move to step S4, and when either "no encoder pulse input" or "abnormal value present" is detected (step S3b: Yes), move to step S6 .

When neither the "no encoder pulse input" nor the "abnormal value" is detected (step S3b: No), the mechanical "stop" by the clutch type obstacle detection stop device related to the drive shaft 2A is performed. is not performed, the control device 10 monitors whether or not the lower limit setting position has been reached without receiving a stop command by the microcomputer unit 101 (step S4). When the position has not been reached (step S4: No), the process proceeds to step S3b, and when a stop command has been received or when the lower limit setting position has been reached (step S4: Yes), the motor 9A is driven. The control is stopped, and the lowering operation of the shielding material is stopped (step S5).

On the other hand, when either "no encoder pulse input" or "abnormal value present" is detected (step S3b: Yes), the clutch type obstacle detection stop device related to the drive shaft 2A stops the machine. Assuming that the "stop" is being performed, the control device 10 causes the microcomputer section 101 to stop the drive control of the motor 9A and stop the lowering operation of the shielding material (step S6). By incorporating the control of steps S2b and S3b, it is possible to grasp the mechanical "stop" of the clutch-type obstacle detection stop device related to the drive shaft 2A and stop the driving of the motor 9A. 1, it is possible to reduce costs and improve quality under the configuration that does not require the microswitches disclosed in 1.

After that, the control device 10 causes the microcomputer unit 101 to automatically raise the shielding material at least to a position for unlocking the obstacle detection/stopping device (step S7). The drive control of 9A is stopped, and the upward movement of the shielding material is stopped (step S8). By incorporating the control of steps S7 and S8, the creep load of the drive shaft 2A (the load due to the sustained stress applied to the drive shaft 2A) can be alleviated, thereby also improving the quality.

As described above, under the configuration in which the microswitch disclosed in Patent Document 1 is not required by the obstacle detection stop control of the third embodiment, the control device 10 can perform the clutch-type obstacle detection related to the drive shaft 2A. A mechanical "stop" by the stop device can be grasped and the driving of the motor 9A can be stopped. It can be grasped, the drive of the motor 9B can be stopped, and the creep load can be alleviated. This makes it possible to improve the quality, eliminate the need for a microswitch as disclosed in Patent Document 1, and wire from the microswitch to the control device 10 and connect the microswitch to the control device 10. It is possible to configure an electric shielding device and its control device 10 which eliminates the need for a detection circuit for detecting the operation and reduces the costs associated with parts and production.

Further, according to the obstacle detection stop control of the third embodiment, both the "no encoder pulse input" and the "abnormal value present" are monitored, and the motor 9A (or Since the driving of 9B) can be stopped, responsiveness is excellent.

(Obstacle detection stop control of Example 4)
FIG. 7 is a flow chart showing obstacle detection stop control of Example 4 of the control device in the electric shielding device of one embodiment according to the present invention. In the obstacle detection stop control of the fourth embodiment, the presence or absence of encoder pulses output from the encoder 8A via the pulse detection section 109a is detected by the microcomputer section 101 of the control device 10, and the motor driving section is detected via the abnormality detection section 108a. 107a (one or more of overcurrent/abnormal waveform current/abnormal waveform voltage) are respectively detected to perform obstacle detection stop control. It is the same except that step S3b is replaced with step S3c.

First, the control device 10 causes the microcomputer section 101 to start drive control of the motor 9A in response to the reception of the lowering command, thereby starting the lowering operation of the shielding material (the lower screen 6U and the bottom rail 7 in this example). (Step S1).

With the start of the lowering operation of the shielding material, the control device 10 causes the microcomputer section 101 to start counting the encoder pulses output from the encoder 8A via the pulse detection section 109a. The presence or absence of an abnormality in the current or voltage or drive waveform, that is, the abnormal value (one or more of overcurrent/abnormal waveform current/abnormal waveform voltage) in the motor driving unit 107a is monitored via the abnormality detection unit 108a (step S2b). .

Then, when the microcomputer unit 101 detects neither "no encoder pulse input" from the encoder 8A nor "abnormal value present" in the motor drive unit 107a via the abnormality detection unit 108a, (Step S3c: No), the process proceeds to step S4, and when both the "no encoder pulse input" and the "abnormal value present" are detected (step S3c: Yes), the process proceeds to step S6.

When neither the "no encoder pulse input" nor the "abnormal value" is detected (step S3c: No), the mechanical "stop" by the clutch type obstacle detection stop device related to the drive shaft 2A is performed. is not performed, the control device 10 monitors whether or not the lower limit setting position has been reached without receiving a stop command by the microcomputer unit 101 (step S4). When the position has not been reached (step S4: No), the process proceeds to step S3c, and when a stop command has been received or when the lower limit setting position has been reached (step S4: Yes), the motor 9A is driven. The control is stopped, and the lowering operation of the shielding material is stopped (step S5).

On the other hand, when both "no encoder pulse input" and "abnormal value present" are detected (step S3c: Yes), mechanical Assuming that "stopping" is being performed, the control device 10 causes the microcomputer section 101 to stop driving control of the motor 9A and stop the lowering operation of the shielding material (step S6). By incorporating the control of steps S2b and S3c, it is possible to grasp the mechanical "stop" by the clutch-type obstacle detection stop device related to the drive shaft 2A and stop the driving of the motor 9A. 1, it is possible to reduce costs and improve quality under the configuration that does not require the microswitches disclosed in 1.

After that, the control device 10 causes the microcomputer unit 101 to automatically raise the shielding material at least to a position for unlocking the obstacle detection/stopping device (step S7), and when it reaches the unlocking position, the motor The drive control of 9A is stopped, and the upward movement of the shielding material is stopped (step S8). By incorporating the control of steps S7 and S8, the creep load of the drive shaft 2A (the load due to the sustained stress applied to the drive shaft 2A) can be alleviated, thereby also improving the quality.

As described above, under the configuration in which the microswitch disclosed in Patent Document 1 is not required by the obstacle detection stop control of the fourth embodiment, the control device 10 can detect the clutch-type obstacle related to the drive shaft 2A. A mechanical "stop" by the stop device can be grasped and the driving of the motor 9A can be stopped. It can be grasped, the drive of the motor 9B can be stopped, and the creep load can be alleviated. This makes it possible to improve the quality, eliminate the need for a microswitch as disclosed in Patent Document 1, and wire from the microswitch to the control device 10 and connect the microswitch to the control device 10. It is possible to configure an electric shielding device and its control device 10 which eliminates the need for a detection circuit for detecting the operation and reduces the costs associated with parts and production.

Further, according to the obstacle detection stop control of the fourth embodiment, both the "no encoder pulse input" and the "abnormal value present" are monitored, and when both are detected, the motor 9A (or 9B) is turned off. Since the drive can be stopped, the malfunction resistance is excellent.

Although the present invention has been described with reference to specific embodiments, the present invention is not limited to the above-described embodiments, and can be modified in various ways without departing from the technical idea thereof. For example, the elevating cord in this specification includes a cord-like cord or a tape-like elevating tape. In addition, the electric shielding device is not limited to the electric pleated screen described above, and if a clutch type obstacle detection stop device can be applied, such as an electric horizontal blind, the obstacle detection stop by the controller 10 control can be achieved.

Further, in the control device 10 described above, detection of "no encoder pulse input" from the encoder 8A, detection of "abnormal value present" in the motor drive unit 107a via the abnormality detection unit 108a, and detection of "abnormal value" from the encoder 8B The function of stopping the driving of the motors 9A and 9B corresponding to the detection of "no encoder pulse input" or the detection of "abnormal value" in the motor drive unit 107b via the abnormality detection unit 108b is performed by the obstacle. Not limited to detection, it can also function as upper limit detection means for detecting the upper limit position of each shielding material and lower limit detection means for detecting the lower limit position of each shielding material.

Accordingly, the electric shielding device and its control device 10 according to the present invention are not limited to the above-described embodiment examples, but only by the description of the claims.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to reduce the cost and improve the quality of an electric shielding device equipped with an obstacle detection/stop device.

1 Headbox 2A, 2B Drive shaft 3U Lifting cord for upper screen 3L Lifting cord for lower screen 4 Intermediate rail 5 Support member 6U Shielding material (upper screen)
6L shielding material (bottom screen)
7 bottom rail 8A, 8B encoder 9A, 9B motor 10 control device 11 DC power supply 15 bracket 20A, 20B drive shaft coupler 21 wired switch 22 wireless remote control 23 infrared remote control 24 personal computer (PC)
101 microcomputer section 102 storage section 103 infrared signal receiving section 104 wireless signal transmitting/receiving section 105 wired signal transmitting/receiving section 106 external device interface (IF) section 107a, 107b motor drive section 108a, 108b abnormality detection section 109a, 109b pulse detection section

Claims (4)

An electric shielding device that rotates a drive shaft by driving a motor to move a shielding material,
a clutch-type obstacle detection and stopping device that detects an obstacle that hinders the unidirectional movement of the shielding material and operates to mechanically lock the rotation of the drive shaft;
an encoder for detecting rotation of the motor;
A control device that inputs and monitors the output value of the encoder and controls the drive of the motor,
The control device determines the presence or absence of an obstacle only by monitoring the input of the output value of the encoder, and when it is determined that there is an obstacle from the result of the monitoring, the obstacle detection stop control that stops driving the motor. have the means
After determining that there is an obstacle based on the result of the monitoring, the obstacle detection stop control means temporarily stops driving the motor, until the clutch type obstacle detection stop device is unlocked. Alternatively, the electric shielding device is characterized in that the motor is controlled to stop after re-driving the motor in a direction to reversely rotate the drive shaft to a predetermined position where the creep load of the drive shaft is released. An electric shielding device that rotates a drive shaft by driving a motor to move a shielding material,
a clutch-type obstacle detection and stopping device that detects an obstacle that hinders the unidirectional movement of the shielding material and operates to mechanically lock the rotation of the drive shaft;
an encoder for detecting rotation of the motor;
A control device that inputs and monitors the output value of the encoder and controls the drive of the motor,
The control device detects the presence or absence of an obstacle only by monitoring one or more abnormal values out of overcurrent, abnormal waveform current, and abnormal waveform voltage associated with the driving of the motor that occur when the clutch-type obstacle detection and stopping device is activated. an obstacle detection stop control means for stopping the driving of the motor when it is determined that there is an obstacle from the result of the monitoring;
After determining that there is an obstacle based on the result of the monitoring, the obstacle detection stop control means temporarily stops driving the motor, until the clutch type obstacle detection stop device is unlocked. Alternatively, the electric shielding device is characterized in that the motor is controlled to stop after re-driving the motor in a direction to reversely rotate the drive shaft to a predetermined position where the creep load of the drive shaft is released. An electric shielding device that rotates a drive shaft by driving a motor to move a shielding material,
a clutch-type obstacle detection and stopping device that detects an obstacle that hinders the unidirectional movement of the shielding material and operates to mechanically lock the rotation of the drive shaft;
an encoder for detecting rotation of the motor;
A control device that inputs and monitors the output value of the encoder and controls the drive of the motor,
The control device monitors the input of the output value of the encoder, and controls one or more of overcurrent, abnormal waveform current, and abnormal waveform voltage associated with the driving of the motor generated when the clutch type obstacle detection and stopping device is operated. Abnormal values are monitored, and the presence or absence of an obstacle is determined based on whether or not the presence of an obstacle is detected by one of the monitoring results. an obstacle detection stop control means for stopping the driving of the motor when the
After determining that there is an obstacle based on the result of the monitoring, the obstacle detection stop control means temporarily stops driving the motor, until the clutch type obstacle detection stop device is unlocked. Alternatively, the electric shielding device is characterized in that the motor is controlled to stop after re-driving the motor in a direction to reversely rotate the drive shaft to a predetermined position where the creep load of the drive shaft is released. An electric shielding device that rotates a drive shaft by driving a motor to move a shielding material,
a clutch-type obstacle detection and stopping device that detects an obstacle that hinders the unidirectional movement of the shielding material and operates to mechanically lock the rotation of the drive shaft;
an encoder for detecting rotation of the motor;
A control device that inputs and monitors the output value of the encoder and controls the drive of the motor,
The control device monitors the input of the output value of the encoder, and controls one or more of overcurrent, abnormal waveform current, and abnormal waveform voltage associated with the driving of the motor generated when the clutch type obstacle detection and stopping device is operated. Abnormal values are monitored, and the presence or absence of an obstacle is determined based on whether or not the presence of an obstacle is detected by the results of both monitoring. Having an obstacle detection stop control means for stopping the drive of the motor,
After determining that there is an obstacle based on the result of the monitoring, the obstacle detection stop control means temporarily stops driving the motor, until the clutch type obstacle detection stop device is unlocked. Alternatively, the electric shielding device is characterized in that the motor is controlled to stop after re-driving the motor in a direction to reversely rotate the drive shaft to a predetermined position where the creep load of the drive shaft is released.