JP2021134544A - Electrically driven shielding device - Google Patents

Abstract

To provide an electrically driven shielding device that carries out setting control of a lower limit position so as to efficiently set a stable lower limit position of a shielding material.SOLUTION: An electrically driven shielding device of the present invention comprises: winding-up drums 51U, 51L to move up or down one or a plurality of shielding materials 6U, 6L; motors 9U, 9L to rotate the winding-up drums; encoders 8U, 8L to detect rotation amount of the winding-up drums; and a controller 10 to control the driving of the motors based on output of the encoders by responding to operation signals from operation devices 21, 22, 23, etc. The controller 10 carries out moving down control of the shielding material in a state where load of an intermediate rail 7U is added to a bottom rail 7L in response to an operation signal to determine a lower limit position from the operation device, and stops the moving down operation of the plurality of shielding materials in response to an operation signal to stop the moving down operation or arrival on a physical lower limit position, and sets the position of the stopped bottom rail 7L and the intermediate rail 7U as the setting lower limit position.SELECTED DRAWING: Figure 1

Description

The present invention relates to an electric shielding device that raises and lowers a shielding material by a driving force of a motor.

The electric shielding device can raise and lower the shielding material by rotating the drive shaft with the driving force of the motor and winding or rewinding the elevating cord (including the string-shaped cord or the tape-shaped elevating tape) with the winding drum. It has become.

In such an electric shielding device, a motor is arranged in the head box, the 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.

Further, an encoder for detecting the rotation speed and the amount of rotation of the drive shaft is arranged in the head box of the electric shielding device, and the speed and the number of pulses of the encoder pulse are counted based on the pulse signal output from the encoder. The value is controlled, and the rotation speed and the amount of rotation of the motor are controlled by a control device arranged in the head box. By such an operation, the speed of raising and lowering the shielding material is appropriately adjusted, and the stop position of the raised and lowered shielding material is controlled.

By the way, as a kind of electric shielding device, it is known that an electric pleated screen can be constructed by suspending a screen that can be folded vertically from the head box in a zigzag shape as a shielding material and allowing the screen to be electrically raised and lowered. (See, for example, Patent Document 1).

In particular, the electric pleated screen disclosed in Patent Document 1 is composed of a plurality of stages (plural types) in which shielding materials are arranged in the vertical direction so that the screen can be raised and lowered electrically. That is, in this electric pleated screen, the screen is composed of an upper shielding material (upper screen) and a lower shielding material (lower screen) of different fabrics in the upper and lower stages, and the upper end edge of the upper screen is attached to the head box and suspended. Then, the lower end edge is attached to the intermediate rail, the upper end edge of the lower screen is attached to the intermediate rail, and the lower end edge is attached to the bottom rail. Then, the intermediate rail and the bottom rail are suspended and supported from the head box by independent lifting cords, and the upper screen and the lower screen can be independently lifted and lowered by electric power.

Conventionally, in such an electric shielding device, a physical detection switch for detecting a physical upper limit position and a lower limit position when raising and lowering the screen is provided.

For example, as disclosed in Patent Document 1, an upper limit switch for mechanically detecting the presence or absence of contact of a folded screen is provided, and an upper limit switch indicating the presence or absence of contact of a folded screen is provided. The position when it is turned on is the physical upper limit position. In addition, a slack detection switch that mechanically determines the presence or absence of slack in the elevating cord for raising and lowering the screen is provided, and the position when the slack detection switch indicating the presence or absence of slack in the elevating cord is turned on is the physical lower limit position. Often.

It should be noted that such a slack detection switch is also used to detect an obstacle when the screen is lowered, and an obstacle detection stop device is configured. The obstacle detection / stopping device stops the operation of the motor when the rail provided at the lower edge of the shielding material comes into contact with the obstacle and cannot be lowered during the lowering operation of the shielding material, so that the lifting cord is useless. It has a function to automatically stop rewinding. For example, an obstacle detection / stopping device using a slack detection switch has a detector that causes slack in the elevating cord when there is an obstacle that hinders the descent of the screen, and the slack causes the detector to slide in the headbox. The operation of the detector activates the micro switch. Then, the control device provided in the head box detects the operation of the micro switch to perform "obstacle detection", and the control device "stops" the motor.

Then, in a general electric shielding device, an upper limit switch that mechanically detects the presence or absence of contact of a part of the shielding material when the shielding material is raised or lowered is provided to hit a part of the shielding material. The physical upper limit position when the upper limit switch indicating the presence of contact is turned on is set as the upper limit position of the current position data (height data) indicating the open / closed state of the shielding material, and the presence or absence of slack in the lifting cord is mechanically determined. A slack detection switch to be performed is provided, and the physical lower limit position when the slack detection switch indicating the presence or absence of slack in the elevating cord is turned on is set as the lower limit position of the current position data (height data).

Japanese Unexamined Patent Publication No. 2011-111763

As described above, in the conventional electric shielding device such as an electric pleated screen, a physical detection switch for detecting a physical upper limit position and a lower limit position when raising and lowering a shielding material (screen or the like) is provided. The range in which the shielding material can be raised and lowered is determined by the physical upper limit position and the physical lower limit position. However, if the physical lower limit position is set as the lower limit of the movable range of the shielding material, the bottom rail provided at the lower end of the shielding material collides with the floor surface, which is not preferable from the viewpoint of quality maintenance. Therefore, usually, a setting mode is provided so that the bottom rail does not collide with the floor surface and the lower limit position is set by the operator at a desired position where the gap from the floor surface is as small as possible.

On the other hand, in an electric shielding device in which a plurality of shielding materials are provided in a row on the upper and lower sides so that each shielding material can be raised and lowered, the cord elongation varies depending on the raising and lowering state of each shielding material. Occurs. For this reason, the lower limit setting that determines the movable range of each shielding material is likely to differ from one electric shielding device to another and cannot be uniquely determined. Therefore, the bottom rail may violently collide with the floor surface, or may be large from the floor surface. It may take time and effort to repeatedly set the lower limit of the desired position several times because the lower limit position where a gap is generated may be reached. Further, conventionally, the lower limit position is set for each shielding material, but this point also requires a setting time and labor. Therefore, regarding the setting of the lower limit, a technique capable of efficiently setting the stable lower limit position of the shielding material in consideration of the cord elongation of the elevating cord is desired.

An object of the present invention is to provide an electric shielding device that controls the setting of the lower limit position so as to efficiently set the stable lower limit position of the shielding material in view of the above-mentioned problems.

The electric shielding device according to the present invention has a plurality of shielding materials having an upper shielding material suspended from a head box and a lower shielding material suspended from an intermediate rail provided at the lower end of the upper shielding material and having a bottom rail at the lower end. An electric shielding device that allows each of the materials to be electrically lifted and lowered, and a first winding that winds up or rewinds a first lifting cord for raising and lowering the upper shielding material by raising and lowering the intermediate rail. To rotate the second winding drum for winding or rewinding the drum and the second lifting cord for raising and lowering the lower shielding material by raising and lowering the bottom rail, and the first winding drum. A first motor, a second motor for rotating the second take-up drum, a first encoder for detecting the amount of rotation of the first take-up drum, and the second winding. Controlling the drive of the first and second motors based on the output values of the second encoder for detecting the rotation amount of the take drum and the output values of the first and second encoders according to the operation signal. A control device for individually raising and lowering each of the plurality of shielding materials is provided, and the control device is provided with an intermediate rail on the bottom rail in response to an operation signal for determining a lower limit position of the plurality of shielding materials. By controlling the lowering of the plurality of shielding materials in a state where the load of the above is applied and responding to an operation signal for stopping the lowering operation, or by reaching a physical lower limit position where the lowering operation is physically restricted It is characterized by having a setting means for stopping the lowering operation of the shielding material and setting the positions of the stopped bottom rail and the intermediate rail as the setting lower limit position.

Further, in the electric shielding device according to the present invention, the control device detects the physical lower limit position based on the detection of one or more of the detection of an abnormal value related to the driving of the motor and the monitoring of the output of the encoder. It is characterized by having means.

Further, in the electric shielding device according to the present invention, the control device detects an abnormality of one or more of the overcurrent, the abnormal waveform current, and the abnormal waveform voltage of the motor as an abnormal value related to the driving of the motor. It is characterized by having a means for detecting the physical lower limit position.

Further, in the electric shielding device according to the present invention, obstacles that hinder the lowering operation of the shielding material are detected, and the rotations of the first and second motors are transmitted to the first and second winding drums, respectively. It is further provided with an obstacle detection / stopping device that operates to mechanically lock the rotation of each drive shaft.

According to the present invention, as an electric shielding device, it becomes possible to efficiently set a stable lower limit position of the shielding material.

(A) to (c) are a plan view, a front view, and a side view showing the schematic configuration of the electric shielding device of one embodiment according to the present invention, respectively. (A) is a cross-sectional view showing a schematic configuration of a clutch-type obstacle detection / stopping device provided in the electric shielding device of one embodiment according to the present invention, and (b) to (e) are the respective ones according to the present invention. It is a perspective view which shows the operation of the clutch type obstacle detection stop device provided in the electric shielding device of embodiment. It is a block diagram which shows the schematic structure of the control device in the electric shielding device of one Embodiment by this invention. It is a figure which shows the schematic structure of the infrared remote control typical as the operation device of one Example in the electric shielding device of one Embodiment by this invention. It is a flowchart which shows the setting control of the upper and lower limit positions of one Example by the control device in the electric shielding device of one Embodiment by this invention. (A) is a side view schematically showing the operation by setting control of the lower limit position in the electric shielding device of the comparative example, and (b) is the lower limit position of one embodiment in the electric shielding device of one embodiment according to the present invention. It is a side view which shows operation by setting control of. (A) to (c) are schematic side views showing an example in which the control device according to the present invention is applied to the electric shielding device of another typical embodiment according to the present invention, respectively.

Hereinafter, an electric shielding device according to an embodiment of the present invention will be described 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 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. Further, in the example described below, with respect to the front view of the electric shielding device shown in FIG. 1 (b), the side to be visually recognized is the front side (or the indoor side), and the opposite side is the rear side (or the outdoor side). ..

(overall structure)
1 (a) to 1 (c) are a plan view (downward view), a front view, and a side view showing a schematic configuration of an electric shielding device according to an embodiment of the present invention, respectively. As a typical example of the electric shielding device shown in FIG. 1, an electric pleated screen in which a plurality of shielding materials are arranged one above the other and can be raised and lowered is shown. However, if each of the plurality of shielding materials arranged vertically can be electrically lifted and lowered by the rotation of the drive shaft, or if a single shielding material can be electrically lifted and lowered. It is not necessary to be limited to this, for example, a pleated screen, a honeycomb screen which is also a kind thereof, a horizontal blind, a raised curtain, a roll screen, etc., or a hybrid configuration in which these different types of shielding materials are arranged in a continuous arrangement. It may be used as an electric shielding device.

Further, in the electric pleated screen of one embodiment shown in FIGS. 1A to 1C, the upper screen 6U as the upper shielding material and the lower shielding material as the upper shielding material that can be individually raised and lowered by a plurality of types of raising and lowering cords 3U and 3L. Although an example in which two types of shielding materials of the lower screen 6L are arranged in a row in the upper and lower directions is shown, an electric pleated screen in which three or more types of shielding materials are arranged in the front-rear direction may be used.

In the electric pleated screen of one embodiment shown in FIGS. 1 (a) to 1 (c), an upper screen 6U that can be bent in a zigzag shape is suspended and supported from the lower surface of the head box 1, and the lower end of the upper screen 6U is supported. It is attached to the upper surface of the intermediate rail 7U that functions as a weight member. The head box 1 is fixed to a mounting surface such as a ceiling surface via a bracket 15.

As shown in FIG. 1 (c), the upper screen 6U of this example is provided with a protruding piece 60 at the position of a crease on the outdoor side of the fabric to be bent in a zigzag shape, and the protruding piece 60 has a round hole or a length. Insertion holes formed of holes or the like are provided, and elevating cords 3U and 3L hanging from the head box 1 are inserted into the insertion holes. Therefore, the elevating cords 3U and 3L are hung on the back side of the upper screen 6U so that they cannot be visually recognized from the front as shown in FIG. 1B to enhance the aesthetic appearance. However, according to the present invention, an insertion hole may be provided in a substantially central portion in the front-rear direction of the upper screen 6U so that the elevating cords 3U and 3L inserted through the insertion hole can be visually recognized from the front. Further, as shown in FIG. 1 (c), a pitch holding cord 4U is hung from the head box 1 behind the elevating cords 3U and 3L, and the lower end thereof is attached to the intermediate rail 7U. A large number of annular support cords 40 are provided at equal intervals in the pitch holding cord 4U, and elevating cords 3U and 3L are inserted through the support cords 40. Then, when the intermediate rail 7U is lowered to extend the upper screen 6U, the projecting pieces 60 are supported by the support cords 40 of the pitch holding cords 4U so that the folds of the upper screen 6U are held at substantially equal intervals. It has become.

Further, a lower screen 6L that can be bent in a zigzag shape is suspended from the lower surface of the intermediate rail 7U, and the lower end of the screen 6L is attached to the upper surface of the bottom rail 7L that functions as a weight member.

Similar to the upper screen 6U, the lower screen 6L of this example is also provided with a projecting piece 60 at the position of the outdoor crease of the fabric to be bent in a zigzag shape, as shown in FIG. 1C, and the projecting piece 60 is provided. The 60 is provided with an insertion hole formed of a round hole, an elongated hole, or the like, and an elevating cord 3L hanging from the head box 1 and penetrating the intermediate rail 7U is inserted into the insertion hole. Therefore, the elevating cord 3L hangs down on the back side of the lower screen 6L so that it cannot be visually recognized from the front as shown in FIG. 1B to enhance the aesthetic appearance. However, according to the present invention, an insertion hole may be provided in a substantially central portion of the lower screen 6L in the front-rear direction so that the elevating cord 3L inserted through the insertion hole can be visually recognized from the front. Further, as shown in FIG. 1 (c), a pitch holding cord 4L is hung from the head box 1 behind the elevating cord 3L, and the lower end thereof is attached to the bottom rail 7L. A large number of annular support cords 40 are provided at equal intervals in the pitch holding cord 4L, and an elevating cord 3L is inserted through the support cord 40. Then, when the bottom rail 7L is lowered to extend the lower screen 6L, the protruding pieces 60 are supported by the support cords 40 of the pitch holding cords 4L so that the folds of the lower screen 6L are held at substantially equal intervals. It has become.

Winding drums 51U and 51L are arranged side by side in front of and behind each of the support members 5 arranged at appropriate positions (two locations on the left and right in this example) in the head box 1 and are rotatably supported. Cam clutches 52U and 52L are provided at one end in the axial direction of the winding drums 51U and 51L, respectively. Each take-up drum 51U and cam clutch 52U, and each take-up drum 51L and cam clutch 52L are configured to have the same shape.

The upper end of the elevating cord 3U (which is a string-shaped cord in this example, but may be a tape-shaped elevating tape) is attached to each winding drum 51U so that it can be wound or rewound. The lower end penetrates an insertion hole formed in each protruding piece 60 provided on the outdoor side of the upper screen 6U and is attached to the intermediate rail 7U. The take-up drum 51U is formed so that the diameter gradually decreases in one direction in the axial direction. In this example, the string-shaped elevating cord 3U is spirally wound around the take-up drum 51U. There is.

Further, the upper end of the elevating cord 3L (which is a string-shaped cord in this example, but may be a tape-shaped elevating tape) is attached to each winding drum 51L so that it can be wound or rewound, and the elevating cord is attached. The lower end of the 3L penetrates an insertion hole formed in each protruding piece 60 provided on the outdoor side of the upper screen 6U, further penetrates the intermediate rail 7U, and is provided on the outdoor side of the lower screen 6L. It penetrates the insertion hole formed in the projecting piece 60 and is attached to the bottom rail 7L. The take-up drum 51L is formed so that the diameter gradually decreases in one direction in the axial direction. In this example, the string-shaped elevating cord 3L is spirally wound around the take-up drum 51L. There is.

A drive shaft 2U is inserted through the central shafts of the take-up drum 51U, the cam clutch 52U, and the rotary drum 53, and the rotary drum 53 transmits the rotation of the drive shaft 2U to the take-up drum 51U and of the take-up drum 51U. The driving force is transmitted to the driving shaft 2U.

Similarly, a drive shaft 2L is inserted through the central shafts of the take-up drum 51L, the cam clutch 52L, and the rotary drum 53, and the rotary drum 53 transmits the rotation of the drive shaft 2L to the take-up drum 51L and takes up. The driving force of the drum 51L is transmitted to the driving shaft 2L.

One end of the drive shaft 2U is connected to the output shaft of the motor 9U via the drive shaft coupler 20U, and the rotation of the output shaft of the motor 9U is transmitted to the drive shaft 2U. Therefore, the drive shaft 2U is rotated by the driving force of the motor 9U, and the elevating cord 3U is wound or rewound by the take-up drum 51U based on the rotation of the drive shaft 2U, so that the intermediate rail 7U can be raised and lowered. As a result, the upper screen 6U can be raised and lowered. Since the take-up drum 51U uses the tension related to the elevating cord 3U (the own weight of the upper screen 6U and the intermediate rail 7U) when the upper screen 6U is lowered, its driving force is taken up via the rotating drum 53. It is transmitted from the drum 51U to the drive shaft 2U, and the driving force related to the drive shaft 2U is adjusted to control the descent.

Further, one end of the drive shaft 2L is connected to the output shaft of the motor 9L via the drive shaft coupler 20L, and the rotation of the output shaft of the motor 9L is transmitted to the drive shaft 2L. Therefore, the bottom rail 7L can be raised and lowered by rotating the drive shaft 2L with the driving force of the motor 9L and winding or rewinding the elevating cord 3L with the take-up drum 51L based on the rotation of the drive shaft 2L. As a result, the lower screen 6L can be raised and lowered. Since the take-up drum 51L uses the tension related to the elevating cord 3L (the own weight of the lower screen 6L and the bottom rail 7L) when the lower screen 6L is lowered, its driving force is taken up via the rotating drum 53. It is transmitted from the drum 51L to the drive shaft 2L, and the driving force related to the drive shaft 2L is adjusted to control the descent.

The drive control of each of the motors 9U and 9L is performed by the control device 10 arranged in the head box 1. A DC power supply 11 for supplying electric power to the motors 9U and 9L and the control device 10 is arranged in the head box 1. When the control device 10 receives an operation signal (not shown) from an external device (not shown) such as a wired switch 21, an infrared remote controller 22, a wireless remote controller 23, or a personal computer (PC), the control device 10 executes various commands included in the operation signal. Performs various controls for the corresponding electric shielding device. For example, by configuring the motors 9U and 9L with DC motors, respectively, by controlling the duty ratio of the pulse signal supplied from the control device 10 to the motors 9U and 9L, the control device 10 controls the rotation speeds of the motors 9U and 9L. Can be controlled. Further, encoders 8U and 8L for detecting the rotation speeds and rotation amounts of the drive shafts 2U and 2L are arranged in the head box 1, and the control device 10 uses the pulse signals output from the encoders 8U and 8L. Based on this, the speed of the encoder pulse and the count value of the number of pulses are managed to control the rotation speed and the amount of rotation of the motors 9U and 9L. By such an operation, the control device 10 appropriately adjusts the ascending / descending speed of the upper screen 6U or the lower screen 6L in response to various commands included in the operation signal, and also adjusts the ascending / descending speed of the upper screen 6U or the lower screen 6U or the lower part. The ascending / descending stop position of the screen 6L is controlled.

In the electric pleated screen of the present embodiment configured in this way, the intermediate rail 7U is pulled up to just below the head box 1, and the upper screen 6U is folded between the head box 1 and the intermediate rail 7U, and the bottom rail is folded. When the 7L is lowered, the lower screen 6L from the head box 1 is shielded to a desired position.

Further, when the intermediate rail 7U is lowered to the top of the bottom rail 7L with the bottom rail 7L lowered to the lower limit, the lower screen 6L is folded between the intermediate rail 7U and the bottom rail 7L, and is intermediate between the head box 1 and the head box 1. The upper screen 6U is shielded from the rail 7U. Therefore, for example, if the upper screen 6U is used as a daylighting material and the lower screen 6L is used as a light-shielding material, the degree of freedom in adjusting the amount of daylighting can be increased.

Then, if the bottom rail 7L is lowered to the lower limit and the intermediate rail 7U is positioned between the head box 1 and the bottom rail 7, the soft light transmitted through the upper screen 6U made of the daylighting material can be collected. can.

When the bottom rail 7L is pulled up to the upper limit and opened, the bottom rail 7L is pulled up together with the intermediate rail 7U, and the upper screen 6U and the lower screen 6L are folded between the head box 1 and the bottom rail 7L. can do.

(Clutch type obstacle detection and stopping device)
By the way, when the intermediate rail 7U or the bottom rail 7L comes into contact with an obstacle and its lowering is hindered, the clutch-type obstacle detection / stopping device is activated to lock the drive shaft 2U or 2L. That is, when the intermediate rail 7U or the bottom rail 7L comes into contact with an obstacle, the take-up drum 51U and the cam clutch 52U supported by the support member 5, and the take-up drum 51L and the cam clutch 52L are the intermediate rail 7U and the bottom, respectively. It functions as a clutch-type obstacle detection / stopping device that mechanically "detects obstacles" for the rail 7L and "stops" each drive shaft. That is, the take-up drum 51U and the cam clutch 52U supported by the support member 5, and the take-up drum 51L and the cam clutch 52L are configured as a clutch-type obstacle detection / stopping device as shown in FIG.
Hereinafter, the clutch-type obstacle detection / stopping device will be briefly described.

Since the take-up drum 51U and the cam clutch 52U have the same structures as the take-up drum 51L and the cam clutch 52L, respectively, they are typically supported by the support member 5 in FIG. 2A. A cross-sectional view of the configuration of the take-up drum 51L and the cam clutch 52L that function as a clutch-type obstacle detection / stopping device is shown.

As shown in FIG. 2A, in the clutch-type obstacle detection / stopping device, the take-up drum 51L and the cam clutch 52L are supported by the support portion 50 in the support member 5, and the cam clutch 52L uses the rotating drum 53. It is connected to the take-up drum 51L via.

The support member 5 is fixed by fitting a snap fit 501 projecting on the bottom surface of the support member 5 to the head box 1. The cam clutch 52L, the rotary drum 53, and the take-up drum 51L are rotatably supported between the through holes 502 and 503 formed at both the left and right ends of the support portion 50. More specifically, the tubular portion 521 of the cam clutch 52L is rotatably supported with respect to the through hole 502, and the pulley cap 54 fitted to the right end of the take-up drum 51L with respect to the through hole 503 becomes rotatable. It is pivotally supported.

The rotary drum 53 is housed inside the cam clutch 52L in the radial direction, and the rotary drum 53 has a substantially cylindrical shape, has a predetermined rotational play with respect to the take-up drum 51L, cannot rotate relative to the winding drum 51L, and does not move relative to the axial direction. It is installed like this. Further, although the drive shaft 2L penetrates into the tubular portion 521 so as to be relatively rotatable, the rotating drum 53 rotates integrally with the drive shaft 2L.

The snap-fit 501 is formed with a take-out port for winding or rewinding the elevating cord 3L from a predetermined position. Further, a braking convex portion 504 is formed on the bottom surface of the left side of the support portion 50 in the drawing.

The take-up drum 51L is formed in a substantially cylindrical shape, and includes an engaging portion 511 and a take-up portion 512.

The winding portion 512 of the winding drum 51L is set so that its diameter gradually decreases from the cam clutch 52L side toward the right end side in the drawing. The drive shaft 2L is rotatably penetrated through the center of the pulley cap 54 fitted to the right end of the take-up drum 51L in the drawing.

A cam clutch 52L is housed inside the engaging portion 511 of the take-up drum 51L in the radial direction. The cam clutch 52L includes a tubular portion 521 formed in a substantially cylindrical shape and a braking portion 522 formed having a diameter larger than that of the tubular portion 521.

The diameter of the outer peripheral surface of the braking portion 522 is set to a size that allows it to slide with the inner peripheral surface of the engaging portion 511 of the take-up drum 51L. One or a plurality of braking claws 523 are formed so as to project in a sawtooth shape at the end of the braking portion 522 on the tubular portion 521 side, and can be engaged with the braking convex portion 504 of the support portion 50.

When the braking claw 523 is prevented from rotating in the circumferential direction by engaging with the braking convex portion 504, the cam clutch 52L is made unable to rotate relative to the support portion 50.

The cam clutch 52L is assembled so that the side wall of the braking portion 522 has a predetermined rotational play with the take-up drum 51L via the rotary drum 53 and cannot rotate relative to the winding drum 51L. It has a cam structure that allows relative movement (sliding) along the direction.

That is, a sliding hole 524 as a cam structure is formed on the side wall of the braking portion 522 in the cam clutch 52L, and the sliding hole 524 is formed so as to be inclined by approximately 45 ° with respect to the axis of the braking portion 522. ing. Further, the length of the sliding hole 524 is set so as to be arranged over an angle range of approximately 45 ° in the circumferential direction of the braking portion 522.

The rotating drum 53 is formed with a sliding convex portion 531 that projects outward in the radial direction. The rotating drum 53 is assembled to the cam clutch 52L so that the sliding convex portion 531 is located inside the sliding hole 524 of the cam clutch 52L. Relative movement is possible only within the range of relative movement inside.

Specifically, when the sliding convex portion 531 is located at one end of the sliding hole 524, the cam clutch 52L is most axially accommodated with respect to the take-up drum 51L (right side in FIG. 2A). Since it is located at, the engagement state between the braking claw 523 and the braking convex portion 504 is released. On the other hand, when the sliding convex portion 531 is located at the other end of the sliding hole 524, the cam clutch 52L slides in the axial direction and protrudes most axially with respect to the take-up drum 51L (FIG. Since it is located on the left side in 2 (a), the braking claw 523 and the braking convex portion 504 are in an engaged state.

When the braking claw 523 and the braking convex portion 504 are engaged with each other, the rotation of the cam clutch 52L is blocked, and the moving range of the cam clutch 52L is restricted by the engaging range of the rotating drum 53 and the take-up drum 51L. The rotation of the rotary drum 53 is stopped in a state where the sliding convex portion 531 is moved to the other end of the sliding hole 524, and the rotation of the drive shaft 2L which is connected to the rotary drum 53 so as to be relatively non-rotatable is also stopped.

Therefore, when the cam clutch 52L moves relative to the take-up drum 51L in the axial direction and the braking claw 523 is engaged with the braking convex portion 504, the cam clutch 52L is locked so as not to rotate relative to the support portion 50. NS. Further, when the engagement state between the braking claw 523 and the braking convex portion 504 is released, the cam clutch 52L can rotate relative to the support portion 50.

In this way, when the drive shaft 2L is rotated in the pulling direction of the shielding material (lower screen 6L), the rotation is transmitted to the rotating drum 53. At this time, the rotating drum 53 is rotated relative to the take-up drum 51L and the cam clutch 52L during the predetermined rotation play.

In this case, the engagement state between the braking claw 523 of the cam clutch 52L and the braking convex portion 504 of the support portion 50 is released, and the cam clutch 52L can rotate relative to the support portion 50. Then, the rotary drum 53 cannot rotate relative to the cam clutch 52L and the take-up drum 51L when the rotation drum 53 rotates more than the predetermined rotation play.

Therefore, when the drive shaft 2L is further rotated in the pulling direction, the rotating drum 53 is integrally rotated in the pulling direction together with the cam clutch 52L and the take-up drum 51L, and the shielding material (lower screen 6L) is pulled up. It is said.

On the other hand, when the drive shaft 2L pulls down the shielding material (lower screen 6L), the weight of the lower screen 6L and the bottom rail 7L is used for pulling down, so that the driving force at the time of pulling down is from the take-up drum 51L to the drive shaft 2L. It is transmitted toward.

When the take-up drum 51L and the cam clutch 52L are rotated in the pulling direction, the engagement state between the braking claw 523 of the cam clutch 52L and the braking convex portion 504 of the support portion 50 is released, so that the rotating drum 53 And the drive shaft 2L is immediately transmitted to rotate in the pulling direction.

Here, FIGS. 2B to 2E show FIG. 2A when the bottom rail 7L collides with an obstacle while the shielding material (lower screen 6L) is being pulled down. ), The operation of the take-up drum 51L and the cam clutch 52L that function as a clutch-type obstacle detection / stopping device is shown in a schematic diagram. Although a simplified diagram is shown as one braking claw 523 in FIGS. 2D and 2E, a plurality of braking claws 523 can be used.

First, as shown in FIG. 2B, when the shielding material (lower screen 6L) is being pulled down, the elevating cord 3L is wound from the take-up drum 51L before the bottom rail 7L collides with an obstacle. It is returned and the lower screen 6L is lowered. Tension in the pull-out direction is applied to the elevating cord 3L wound around the take-up drum 51L due to the weight of the bottom rail 7L, etc., and the take-up drum 51L rotates by its own weight as the cam clutch 52L rotates, and the drive shaft 2L The rotation control controls the rotation of its own weight. At this time, the sliding convex portion 531 is located at one end of the sliding hole 524, and the cam clutch 52L is located on the side (right side in FIG. 2A) that is most accommodated in the axial direction with respect to the take-up drum 51L. Therefore, the engagement state between the braking claw 523 and the braking convex portion 504 is released.

Then, as shown in FIG. 2C, when the bottom rail 7L collides with an obstacle, the tension in the pull-out direction of the elevating cord 3L is lost, and the rotation of the take-up drum 51L and the cam clutch 52L is stopped, but the rotating drum 53 , And the drive shaft 2L maintains rotation, so that a rotation difference occurs. However, the rotating drum 53 is rotated relative to the take-up drum 51L only during the predetermined rotation play.

Then, the sliding convex portion 531 is guided to the sliding hole 524, and as shown in FIG. 2D, during the course of the predetermined rotational play of the rotating drum 53 as the winding drum 51L stops rotating, the sliding convex portion 531 is guided to the sliding hole 524. The cam clutch 52L starts relative movement (slide) in the axial direction.

Then, as shown in FIG. 2E, the braking claw 523 in the cam clutch 52L engages with the braking convex portion 504 during the lapse of the predetermined rotational play of the rotating drum 53 as the rotation of the winding drum 51L is stopped. By doing so, rotation in the circumferential direction is prevented, and the cam clutch 52L cannot rotate relative to the support portion 50. The rotation of the cam clutch 52L is blocked, and at this time, the moving range of the cam clutch 52L is restricted by the engaging range of the rotating drum 53 and the take-up drum 51L. The rotation of the rotary drum 53 is stopped while the 531 is moved, and the rotation of the drive shaft 2L which is connected to the rotary drum 53 so as to be relatively non-rotatable is also stopped. In this way, the cam clutch 52L is made unable to rotate 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 2L is locked.

In the example shown in FIG. 2, in the cam clutch 52L, the side wall of the braking portion 522 is assembled to the take-up drum 51L via the rotating drum 53 so as to be unable to rotate relative to the winding drum 51L, and the predetermined rotation. Within the range of play, the sliding hole 524 formed in the cam clutch 52L guides the sliding convex portion 531 formed in the rotating drum 53, so that the cam structure can be relatively moved (sliding) along the axial direction. However, the cam structure that mechanically locks the drive shaft 2L is not limited to this example, and the rotation of the drive shaft 2L is mechanically rotated when the rotation of the take-up drum 51L is stopped due to a physical obstacle. Various forms are conceivable, as long as the cam clutch structure is used to stop the vehicle.

For example, instead of the rotating drum 53 and the cam clutch 52L, a cam clutch having a braking claw 523 that can engage with the braking convex portion 504 and a sliding convex portion 531 is formed, and the cam clutch is included in the take-up drum 51L. It can be configured to be supported by a peripheral wall. In this case, the cam clutch has a structure that cannot rotate relative to the drive shaft 2L but allows relative movement (slide movement) within a predetermined range with respect to the take-up drum 51L in the axial direction, and the sliding convex In order to operate the rotation of the portion 531 in the same manner as the operation illustrated in FIG. 2, a cam clutch structure in which a sliding groove corresponding to the sliding hole 524 is formed on the inner peripheral wall of the take-up drum 51L can be formed.

(Control device configuration)
FIG. 3 is a block diagram showing a schematic configuration of a control device 10 in the electric shielding device of the 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, an infrared remote controller 22, a wireless remote controller 23, or a personal computer (PC) 24, the control device 10 is electrically operated corresponding to various commands included in the operation signal. Performs various controls on the shielding device. For example, the control device 10 manages the speed and the count value of the number of encoder pulses from the encoders 8U and 8L to control the rotation speed and the rotation amount of the motors 9U and 9L, and each shielding material (each screen and each bottom rail). ) Is adjusted as appropriate, and the ascending / descending stop position of each shielding material is controlled.

The wired switch 21 is an operation switch having a function of transmitting an operation signal to the control device 10 by making a wired connection to the control device 10.

The infrared remote controller 22 is a remote controller having a function of transmitting an operation signal to the control device 10 by wirelessly connecting to the control device 10 by infrared rays.

The wireless remote controller 23 is a remote controller having a function of transmitting an operation signal to the control device 10 by wirelessly connecting to the control device 10 by a wireless LAN (including short-range wireless communication).

The personal computer (PC) 24 has a function of transmitting an operation signal to the control device 10 by making a wired connection to the control device 10 (or by making a wireless connection by a wireless LAN).

Here, the operation signal includes an ascending command instructing an ascending operation of each shielding material (each screen and each bottom rail), a descending command instructing a descending operation of each shielding material, and an instruction to stop the ascending / descending operation of each shielding material. It includes at least a stop command and a command to set the upper and lower limit positions of each shielding material. Further, the various commands for instructing the raising and lowering of each of these shielding materials can be associated with the "% instruction operation" indicating the opening ratio of each shielding material.

Further, when the operator performs an ascending operation of each shielding material (each screen and each bottom rail) with the wired switch 21, the infrared remote controller 22, or the wireless remote controller 23, as illustrated in FIG. 1 and FIG. 4 described later. An ascending command can be sent by pressing the "open button (OPEN, Δ, etc.)", and when performing a descending operation, a "close button (CLOSE, ▽, etc.)" as illustrated in FIG. 1 and FIG. 4 described later will be performed. The descending command can be transmitted by pressing, and when the ascending / descending operation is stopped, the stop command can be transmitted by pressing the "stop button (STOP, □, etc.)" as illustrated in FIG. 1 and FIG. 4 described later. ..

Then, as shown in FIG. 3, the control device 10 includes a microcomputer unit 101, a storage unit 102, a radio signal receiving unit 103, an infrared signal transmitting / receiving unit 104, a wired signal transmitting / receiving unit 105, and an external device interface (IF) unit 106. , Motor drive units 107U, 107L, abnormality detection units 108U, 108L, and pulse detection units 109U, 109L.

The wireless signal receiving unit 103 is a functional unit that receives an operation signal from the wireless remote controller 23 and outputs it to the microcomputer unit 101, enables mutual communication between the microcomputer unit 101 and the wireless remote controller 23, and details the operation. Enables the exchange of various commands.

The infrared signal transmission / reception unit 104 is a functional unit that receives an operation signal from the infrared remote controller 22 and outputs the operation signal to the microcomputer unit 101.

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

The external device interface (IF) unit 106 is a functional unit that receives an operation signal from an external device such as a personal computer (PC) 24 and outputs the operation signal to the microcomputer unit 101, and is a functional unit that outputs the operation signal to the microcomputer unit 101 and the external device interface (IF). ) Mutual communication is possible with the unit 106, and detailed commands related to the operation can be exchanged.

The motor drive units 107U and 107L are motor drivers that drive the motors 9U and 9L, respectively.

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

The pulse detection units 109U and 109L are functional units that receive pulse signals from the encoders 8U and 8L, respectively, and notify the microcomputer unit 101.

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

Then, for the function of the control device 10 realized by the execution of the program by the microcomputer unit 101, the operation signal is received, various commands included in the operation signal are discriminated, and various controls of the corresponding electric shielding device are performed. Function, The presence / absence of an encoder pulse and the number of encoder pulses are counted via the pulse detection units 109U and 109L that receive pulse signals from the encoders 8U and 8L, respectively, and the count value is appropriately stored in the storage unit 102. 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, drive the motors 9U and 9L The function of controlling the drive of the motors 9U and 9L via the motor drive units 107U and 107L, respectively, and one or more of the abnormal values (overcurrent / abnormal waveform current / abnormal waveform voltage) in the motor drive units 107U and 107L. ) Are detected and notified to the microcomputer unit 101, respectively, and the function of monitoring the abnormal value is included via the abnormality detecting units 108U and 108L.

(Operating device)
FIG. 4 is a diagram showing a schematic configuration of an infrared remote controller 22 typical as an operating device of an embodiment in the electric shielding device of the embodiment according to the present invention. The infrared remote controller 22 of this embodiment has only one set of open / close buttons (open button 221 and close button 222) and a stop button 223, and the same applies to the wired switch 21 and the wireless remote controller 23 shown in FIG.

The infrared remote controller 22 shown in FIG. 4 is divided into groups according to device IDs up to a maximum of 4 groups when a plurality of electric shielding devices are installed as operation targets, and a plurality of electric remote controllers having the same device ID are used. Regarding the shielding device, a group designation button (circle button of "1" to "4" in the figure) 224 for group designation and simultaneous operation, and a batch designation button for simultaneous operation of all groups (shown in the figure). It has an "ALL" button) 225. Device IDs corresponding to the group designation button 224 and the batch designation button 225 can be set for each of the plurality of electric shielding devices installed as operation targets by a DIP switch or the like. Therefore, normally, when the infrared remote controller 22 shown in FIG. 4 is used, the control device 10 in the electric shielding device to be operated is an open / close button (open button 221) transmitted after pressing the group designation button 224 or the batch designation button 225. And the operation signal by pressing the close button 222) and the stop button 223 are recognized and controlled to perform the corresponding operation. However, the set value of the device ID in each electric shielding device does not require pressing the group designation button 224 or the batch designation button 225, and the open / close button (open button 221 and close button 222) and the stop button 223 are directly pressed. It is possible to provide a mode for recognizing the operation signal due to pressing and controlling so as to perform the corresponding operation.

Then, as described above, the infrared remote controller 22 shown in FIG. 4 has a function of transmitting an operation signal by infrared rays to the control device 10 in the electric shielding device to be operated, and opens the button when performing the ascending operation. The ascending command can be transmitted by pressing 221, the descending command can be transmitted by pressing the close button 222 when performing the descending operation, and the stop command can be transmitted by pressing the stop button 223 when performing the stopping operation of the ascending / descending operation.

Further, when the operation device such as the infrared remote controller 22 sets the upper and lower limit positions of the shielding materials, the stop button 223 is pressed and held for a predetermined time, or the open button 221 and the stop button 223 are simultaneously held and held for a predetermined time. , The setting command for shifting to the setting mode can be transmitted to the control device 10 in the electric shielding device to be set. After shifting to the setting mode based on the reception of the setting command, the control device 10 in the electric shielding device to be set automatically raises one of the predetermined shielding materials among the plurality of shielding materials possessed by the electric shielding device to be set. Then, the upper limit position is set by pressing and holding the stop button 223 for a predetermined time and stored in the storage unit 102, and then the other shielding material is automatically raised, and the upper limit position is determined by pressing and holding the stop button 223 for a predetermined time. Is determined and stored in the storage unit 102, then each shielding material is automatically lowered, and the lower limit position setting of each shielding material is determined by pressing and holding the stop button 223 for a predetermined time and stored in the storage unit 102. The setting control of the upper and lower limit positions of a plurality of shielding materials is performed.

(Detection of physical upper limit position and physical lower limit position)
In the electric shielding device of the present embodiment, each of the motors 9L and 9U and the control device 10 are connected by a motor harness, but the physical upper limit position and the physical lower limit position when raising and lowering the screen like a conventional electric pleated screen. There is no physical detection switch to detect. Even in this case, the control device 10 determines the absolute upper and lower limit positions based on the count value of the encoder pulse obtained from the encoders 8L and 8U, or the abnormality detection unit 108L and 108U causes an abnormality in the motor drive units 107L and 107U. By detecting each value (1 or more of overcurrent / abnormal waveform current / abnormal waveform voltage), or detecting that the input of the encoder pulse for a predetermined time disappears during operation control, etc. , The physical upper limit position and the physical lower limit position that define the physical elevating operation range can be detected for each of the upper screen 6U and the lower screen 6L.

That is, in the electric pleated screen according to the present embodiment, the physical upper limit position and the physical lower limit position are detected for each of the upper screen 6U and the lower screen 6L without using the conventional detection switch to reduce the cost. However, if the physical lower limit position is set as the lower limit of the movable range of the shielding material, the bottom rail 7L will collide with the floor surface. Therefore, normally, the bottom rail 7L should not collide with the floor surface and the floor as much as possible. A setting mode is provided for the operator to set the lower limit position at a desired position where the gap is small from the surface. On the other hand, the lower limit setting that determines the movable range of each shielding material is likely to differ for each electric shielding device and cannot be uniquely determined. Therefore, the bottom rail 7L provided at the lower end of the shielding material violently collides with the floor surface. It may take time and effort to repeatedly set the lower limit of the desired position several times because the lower limit position is set so that a large gap is generated from the floor surface. Therefore, it is preferable that the time and effort for setting the lower limit can be reduced, and the stable lower limit position of the shielding material can be efficiently set in consideration of the cord elongation of the elevating cord.

Therefore, in the electric pleated screen according to the present embodiment, the control device 10 controls the setting of the lower limit position of the shielding material in a stable and efficient manner. In the specification of the present application, the upper limit position set by the control of the control device 10 of one embodiment described below is referred to as a "set upper limit position" and is distinguished from the above-mentioned "physical upper limit position". Further, in this embodiment, the lower limit position can be set at a desired position by the operator as in the conventional case, but it is controlled so that the stable lower limit position of the shielding material can be set in consideration of the cord elongation of the elevating cord. The set lower limit position is referred to as a "set lower limit position" and is distinguished from the above "physical lower limit position".

(Setting control of upper and lower limit positions)
FIG. 5 is a flowchart showing setting control of upper and lower limit positions of an embodiment by a control device in the electric shielding device of the embodiment according to the present invention.

First, the control device 10 issues a setting command (upper / lower limit position setting command) for shifting from the operating device such as the infrared remote controller 22 shown in FIG. 4 described above to a setting mode for setting the upper / lower limit position of each shielding material. Upon reception (step S1), the upper and lower shielding materials (in this example, the upper screen 6U having the intermediate rail 7U at the lower end and the lower screen 6L having the bottom rail 7L at the lower end) start the ascending operation individually or simultaneously. (Step S2).

In the example of the present embodiment, as in the infrared remote controller 22 shown in FIG. 4, only one set of open / close buttons (open button 221 and close button 222) and stop button 223 is provided, and the above-described predetermined operation is performed. An upper / lower limit position setting command is transmitted to the control device 10, but for this control, an operation device having only one set of open / close buttons (open button 221 and close button 222) and stop button 223. It is not limited to, and can be any operating device. Further, in the present embodiment, the "upper / lower limit position setting" of the plurality of shielding materials will be described as an example, but in the present invention, the control may be such that only the "lower limit position setting" of the plurality of shielding materials is performed.

Then, in the present embodiment in which the upper and lower limit positions are set, the control device 10 has a physical upper limit position for each shielding material in both the case where each shielding material is raised individually and the case where each shielding material is raised at the same time. When the individual or simultaneous ascending operation of all the shielding materials is continued (step S3: N) and the physical upper limit position is detected for the ascending shielding material (step S3: Y), the physical upper limit position is detected. The ascending operation of the shielding material is stopped, and the count value of the encoder pulse (pulse signal) output from each of the encoders 8U and 8L when the ascending operation of all the shielding materials is stopped is temporarily stored in the storage unit 102 (step). S4).

Further, in the present embodiment in which the upper and lower limit positions are set, in step S4, once the control of the ascending operation of each shielding material is stopped, the control device 10 is a position in which a predetermined amount is lowered from the physical upper limit position for each shielding material. Is set as the upper limit position, and the count value of the encoder pulse of each encoder 8U, 8L at that time is stored in the storage unit 102.

It should be noted that this set upper limit position is a position where at least the uppermost portion of each of the folded shielding materials is not compressed. At the set upper limit position automatically determined in this way, each of the folded shielding materials does not become highly compressed, and material fatigue of the shielding material and the elevating cord can be prevented to maintain high quality. However, the subject of the present invention is "control of setting the lower limit position", and the "physical upper limit position" may be set as the "setting upper limit position".

Hereinafter, "control of setting the lower limit position" according to the present invention will be described.

That is, the control device 10 automatically determines the upper and lower shielding materials in a state where the load of the intermediate rail 7U of the upper shielding material is applied to the bottom rail 7L of the lower shielding material after the setting upper limit position of each shielding material is determined. The lowering control of the shielding material is started (step S5), and the descending operation of each shielding material is continued until the physical lower limit position is reached or the stop command is received for each shielding material (step S6).

Then, when the control device 10 reaches the physical lower limit position with the load of the intermediate rail 7U of the upper shielding material applied to the bottom rail 7L of the lower shielding material, or when the stop command is received, the upper and lower parts 10 With respect to the shielding material, each descending operation is stopped, the stop position of each shielding material is set as the set lower limit position, the count value of the encoder pulse of each encoder 8U, 8L at that time is stored in the storage unit 102, and this control is terminated. (Step S7).

The control device 10 is controlled by monitoring whether the physical lower limit position has been reached or whether a stop command has been received and performing downward control. However, the lower limit position of the desired position of the bottom rail 7L is set. Therefore, the operator presses the stop button 223 of the operating device before the bottom rail 7L reaches the physical lower limit position, sends a stop command from the operating device to the control device 10, and sets the "setting lower limit position". And the physical lower limit position (that is, physical) of the bottom rail 7L with the load of the intermediate rail 7U of the upper shielding material applied by placing a spacer of the desired height on the floor surface in advance. It is possible to take one of the methods of setting the "setting lower limit position" by detecting (the position where the descending operation is restricted).

Here, with respect to the "lower limit position setting control" according to the present invention shown in FIG. 5, the setting of the lower limit positions of the upper and lower shielding materials is stable and efficient, with reference to FIG. I will explain.

FIG. 6A is a side view schematically showing an operation by setting and controlling the lower limit position in the electric cloaking device of the comparative example, and FIG. 6B is an embodiment in the electric cloaking device of the embodiment according to the present invention. It is a side view which shows operation by setting control of the lower limit position of an example.

In the comparative example shown in FIG. 6A, as in the conventional case, the upper shielding material (upper screen 6U having the intermediate rail 7U at the lower end) and the lower shielding material (lower screen 6L having the bottom rail 7L at the lower end) are individually provided. The operation when setting the lower limit position is shown.

First, as shown in FIG. 6A-1, the upper shielding material (upper screen 6U having the intermediate rail 7U at the lower end) and the lower shielding material (lower screen 6L having the bottom rail 7L at the lower end) are folded. It is assumed that they are at the set upper limit positions.

Next, in this comparative example, as shown in FIG. 6 (a-2), only the lower shielding material (lower screen 6L having the bottom rail 7L at the lower end) is lowered from the state shown in FIG. 6 (a-1). , The setting of the lower limit position of the lower shielding material by pressing the stop button 223 of the operating device is completed.

Next, in this comparative example, as shown in FIG. 6 (a-3), the upper shielding material (upper screen 6U having the intermediate rail 7U at the lower end) is lowered from the state shown in FIG. 6 (a-2). , The lower limit position of the upper shielding material is set by pressing the stop button 223 of the operating device.

Then, in this comparative example, as shown in FIG. 6 (a-4), the load of the intermediate rail 7U of the upper shielding material is applied to the bottom rail 7L, and the lifting cord 3L is stretched, so that FIG. 6 (a-). The bottom rail 7L is positioned below the already set lower limit position of the lower shielding material shown in 2), and the actual lower limit position of the lower shielding material is deviated (“Δh” in the figure). For this reason, the bottom rail 7F may violently collide with the floor surface, or the lower limit position where a large gap is generated from the floor surface may be reached, and it may take time and effort to repeat the lower limit setting of the desired position several times. .. Further, conventionally, the lower limit position is set for each shielding material, which requires a long time and labor.

On the other hand, the operation by setting and controlling the lower limit position of the embodiment according to the present invention shown in FIG. 6B is the upper shielding material (upper screen 6U having the intermediate rail 7U at the lower end) and the lower shielding material (bottom rail 7L at the lower end). The operation when the lower limit position is set collectively for the lower screen 6L) held in the above is shown.

First, as shown in FIG. 6 (b-1), the upper shielding material (upper screen 6U having the intermediate rail 7U at the lower end) and the lower shielding material (lower screen 6L having the bottom rail 7L at the lower end) are folded. It is assumed that they are at the set upper limit positions.

Next, in this embodiment, as shown in FIG. 6 (b-2), from the state shown in FIG. 6 (b-1) to the bottom rail 7L of the lower shielding material (lower screen 6L), the upper shielding material ( With the load of the intermediate rail 7U of the upper screen 6U) applied, the lower limit setting of the upper and lower shielding materials is started.

Then, in this embodiment, the load of the intermediate rail 7U of the upper shielding material is already applied to the bottom rail 7L, and the elevating cord 3L descends with the cord stretched. Not only can it be set, but there is no risk that the lower limit position of the setting will shift later.

Therefore, in the setting control of the lower limit position of one embodiment according to the present invention, it becomes possible to efficiently set the stable lower limit position of the shielding material.

Although the present invention has been described above with reference to examples of specific embodiments, the present invention is not limited to the examples of the above-described embodiments, and various modifications can be made without departing from the technical idea.

For example, the electric shielding device is not limited to the electric pleated screen described above, but is also a kind of honeycomb screen, horizontal blinds, tucked-up curtains, roll screens, etc., or a combination of these different types of shielding materials arranged one above the other. It can also be applied to other types of electric shielding devices such as a hybrid configuration (for example, the upper shielding material is a raised curtain type shielding material and the lower shielding material is a pleated screen type shielding material). ..

Typical examples of other electric shielding devices having a shielding material connected vertically are shown in FIGS. 7A to 7C, respectively. 7 (a) to 7 (c) are schematic side views showing an example in which the control device according to the present invention is applied to the electric shielding device of another typical embodiment according to the present invention, respectively. The same reference numbers are assigned to the same components as those in the above-described embodiment.

First, the electric shielding device shown in FIG. 7A is suspended from the upper shielding material (honeycomb-shaped upper screen 6U having an intermediate rail 7U at the lower end) and the intermediate rail 7U suspended from the head box 1. This is an electric honeycomb screen capable of raising and lowering the lower shielding material (the honeycomb-shaped lower screen 6L having a bottom rail 7L at the lower end). The take-up drums 51U and 51L shown in FIG. 7A wind up or rewind the upper ends of the elevating cords 3U and 3L to wind the upper screen 6U and the lower screen 6L in the same manner as in the embodiment shown in FIG. Raise and lower. An insertion hole is provided in each honeycomb-shaped joint piece 60'on the upper screen 6U, and the elevating cords 3U and 3L are inserted into the insertion hole, and the lower end of the elevating cord 3U is attached to the intermediate rail 7U. NS. Further, the elevating cord 3L penetrates the intermediate rail 7U, is inserted into an insertion hole provided in the joint piece 60'forming each honeycomb shape in the lower screen 6L, and is attached to the bottom rail 7L. Encoders 8U and 8L and motors 9U and 9L are arranged in the head box 1, respectively (not shown). Then, a DC power supply 11 (not shown) and a control device 10 similar to that shown in FIG. 3 are arranged in the head box 1. Therefore, also for the electric honeycomb screen shown in FIG. 7A, the stable lower limit position of the shielding material can be efficiently set by the lower limit setting control of the control device 10 according to the present invention.

Further, the electric shielding device shown in FIG. 7B is an upper shielding material supported by a ladder cord 12U suspended from the head box 1 (for example, a fabric slat group 6U ′ made of a daylighting fabric having an intermediate rail 7U at the lower end. ) And the lower shielding material (for example, a light-shielding aluminum slat group 6L'with a bottom rail 7L at the lower end) suspended from the head box 1 and supported by a ladder cord 12L penetrating the intermediate rail 7U. It is a horizontal blind. The take-up drums 51U and 51L shown in FIG. 7B wind up or rewind the upper ends of the elevating cords 3U and 3L in the same manner as in the embodiment shown in FIG. Raise and lower group 6L'. An insertion hole is provided in the substantially central portion of the fabric slat group 6U'in the front-rear direction, and the elevating cords 3U and 3L are inserted into the insertion holes, and the lower end of the elevating cord 3U is attached to the intermediate rail 7U. Further, the elevating cord 3L penetrates the intermediate rail 7U, is inserted into an insertion hole provided at a substantially central portion in the front-rear direction in the aluminum slat group 6L', and is attached to the bottom rail 7L. Then, the fabric slat group 6U'and the aluminum slat group 6L'can be rotated by the relative movement of the warp threads of the ladder cords 12U and 12L, respectively, but the description of the mechanism will be omitted. Encoders 8U and 8L and motors 9U and 9L are arranged in the head box 1, respectively (not shown). Then, a DC power supply 11 (not shown) and a control device 10 similar to that shown in FIG. 3 are arranged in the head box 1. Therefore, even for the electric horizontal blind shown in FIG. 7B, the stable lower limit position of the shielding material can be efficiently set by the lower limit setting control of the control device 10 according to the present invention.

Further, as shown in FIG. 7C, the upper shielding material is a fabric slat group 6U'of, for example, a daylighting fabric having an intermediate rail 7U at the lower end, and the lower shielding material is a side view having a bottom rail 7L at the lower end. A control device 10 similar to that shown in FIG. 3 may be arranged in an electric shielding device having a hybrid configuration having a zigzag (may be honeycomb-shaped) lower screen 6L. As an electric shielding device having another hybrid configuration, although not shown, for example, the upper shielding material is a raised curtain type shielding material, and the lower shielding material is a pleated screen type shielding material. A control device 10 similar to that shown in FIG. 3 may be arranged in the electric shielding device having the configuration. Also in these hybrid-structured electric shielding devices, the stable lower limit position of the shielding material can be efficiently set by the lower limit setting control of the control device 10 according to the present invention.

Therefore, the electric shielding device according to the present invention is not limited to the example of the above-described embodiment, but is limited only by the description of the claims.

According to the present invention, as an electric shielding device, it becomes possible to efficiently set a stable lower limit position of a shielding material, which is useful for applications of an electric shielding device.

1 Headbox 2U, 2L Drive shaft 3U Lifting cord for upper screen 3L Lifting cord for lower screen 5 Support member 6U Upper shielding material 6L Lower shielding material 7U Intermediate rail 7L Bottom rail 8U, 8L Encoder 9U, 9L Motor 10 Control device 11 DC power supply 20U, 20L Drive shaft coupler 21 Wired switch 22 Infrared remote control 23 Wireless remote control 24 Personal computer (PC)
101 Microcomputer unit 102 Storage unit 103 Radio signal reception unit 104 Infrared signal transmission / reception unit 105 Wired signal transmission / reception unit 106 External device interface (IF) unit 107U, 107L Motor drive unit 108U, 108L Abnormality detection unit 109U, 109L Pulse detection unit

Claims (4)

Each of a plurality of shielding materials having an upper shielding material suspended from the head box and a lower shielding material suspended from an intermediate rail provided at the lower end of the upper shielding material and having a bottom rail at the lower end is electrically raised and lowered. It is an electric shielding device that enables
A first winding drum for winding or rewinding a first lifting cord for raising and lowering the upper shielding material by raising and lowering the intermediate rail, and
A second winding drum for winding or rewinding a second lifting cord for raising and lowering the lower shielding material by raising and lowering the bottom rail.
A first motor for rotating the first take-up drum and
A second motor for rotating the second take-up drum and
A first encoder for detecting the amount of rotation of the first take-up drum, and
A second encoder for detecting the amount of rotation of the second take-up drum, and
A control device that individually raises and lowers each of the plurality of shielding materials by controlling the drive of the first and second motors based on the output values of the first and second encoders according to the operation signal. And with
The control device performs lowering control of the plurality of shielding materials in a state where the load of the intermediate rail is applied to the bottom rail in response to an operation signal for determining the lower limit position of the plurality of shielding materials, and performs a lowering operation. The lowering operation of the plurality of shielding materials is stopped according to the operation signal to be stopped, or when the physical lower limit position where the lowering operation is physically restricted is reached, and the stopped bottom rail and the intermediate rail are stopped. An electric shielding device having a setting means for setting a position as a setting lower limit position. The control device includes means for detecting the physical lower limit position based on the detection of an abnormal value related to the driving of the motor and the detection of one or more of the monitoring of the output of the encoder. Item 1. The electric shielding device according to item 1. The control device provides means for detecting the physical lower limit position based on the detection of one or more of the overcurrent, the abnormal waveform current, and the abnormal waveform voltage of the motor as an abnormal value related to the driving of the motor. The electric shielding device according to claim 2, wherein the electric shielding device is provided. Detects obstacles that hinder the lowering operation of the shielding material, and mechanically locks the rotation of each drive shaft that transmits the rotation of the first and second motors to the first and second take-up drums, respectively. The electric shielding device according to any one of claims 1 to 3, further comprising an obstacle detection / stopping device that operates in such a manner.

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