JP2020037854A - Electric shading device - Google Patents

Abstract

To provide an electric shading device capable of variably setting an upper limit position and a lower limit position at a desired position for each shading member when each of a plurality of stages of shading members connected in a vertical direction can be electrically raised/lowered, and an electric shading device for electrically controlling the raising/lowering of the shielding member by preventing a creep load.SOLUTION: An electric shading device according to an aspect of the present invention includes a control device 10 which makes it possible to electrically raise/lower each of a plurality of levels of shading members connected in the vertical direction, the plurality of levels of shielding materials including an upper shading member (upper screen 6U) and a lower shading member (lower screen 6L), and makes it possible to individually set respective upper limit positions or respective lower limit positions of the upper shading member and the lower shading member, or respective directions thereof within respective raising and lowering ranges. An electric shading device according to another aspect of the present invention includes a motor 9A capable of raising/lowering a shading member, and a control device 10 for controlling the drive of the motor 9A while monitoring an abnormal value related to the drive of the motor 9A.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to an electric shielding device that controls raising and lowering of a shielding material by a driving force of a motor.

  The electric shielding device rotates the drive shaft by the driving force of a motor, and winds up or down a lifting cord (including a cord-like cord or a tape-like lifting tape) with a winding drum or rewinds, thereby raising and lowering the shielding material. It is possible.

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

  Further, an encoder for detecting the rotation speed and the rotation amount of the drive shaft is provided in the head box of the electric shielding device, and based on the pulse signal output from the encoder, the speed of the encoder pulse and the counting of the number of pulses are counted. By controlling the values, the control device provided in the head box controls the rotation speed and the rotation amount of the motor. By such an operation, the speed of lifting and lowering the shielding material is appropriately adjusted, and the stop position of the raised and lowered shielding material is controlled.

  By the way, it is known that an electric pleated screen can be configured as a kind of an electric shielding device, in which a screen that can be folded in a zigzag manner in a vertical direction from a head box is hung as a shielding material, and the screen can be electrically operated to move up and down. (For example, see Patent Document 1).

  In particular, in the electric pleated screen disclosed in Patent Literature 1, the shielding material is configured in a plurality of stages (a plurality of types) connected in a vertical direction, and can be moved up and down 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 edge of the upper screen is attached to the head box and suspended. Then, the lower edge is attached to the intermediate rail, the upper edge of the lower screen is attached to the intermediate rail, suspended, and the lower 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 / lowering cords, and the upper screen and the lower screen can be individually raised / lowered by electric power.

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

  For example, as disclosed in Patent Document 1, an upper limit switch that mechanically detects the presence or absence of contact of a folded screen is provided, and the upper limit switch of the upper limit switch that indicates the presence of contact of the folded screen is provided. The position at which the switch is turned ON is defined as a physical upper limit position (hereinafter, referred to as a “physical upper limit position”). In addition, a slack detection switch for mechanically determining whether or not the lifting code for lifting the screen is loosened is provided, and the position at which the looseness detection switch indicating presence of looseness of the lifting code is turned ON is a physical lower limit position. (Hereinafter, referred to as “physical lower limit position”).

  It should be noted that such a looseness detection switch is also used for detecting an obstacle when the screen is lowered, thereby constituting an obstacle detection stop device. The obstacle detection stop device stops the operation of the motor when the rail provided on the lower edge of the shielding material comes into contact with an obstacle during the lowering operation of the shielding material and becomes unable to descend, and the use of the lifting cord is useless. It has a function to stop rewinding automatically. For example, an obstacle detection stop device using a slack detection switch has a detector that causes slack in a lifting code when there is an obstacle that prevents the screen from descending, and the detector slides in the head box due to the slack, The microswitch is operated by the operation of the detector. Then, the control device provided in the head box detects the operation of the microswitch to perform “obstacle detection”, and the control device stops the motor.

  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 moved up and down is provided, and a part of the shielding material is moved. 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 / absence of slack of the lifting code is mechanically determined. A looseness detection switch is provided, and a physical lower limit position when the looseness detection switch indicating the presence / absence of the lifting code is turned ON is set as a lower limit position of the current position data (height data).

  Further, in a general electric shielding device, an encoder for detecting a rotation speed and a rotation amount of a drive shaft for elevating and lowering the shielding material is provided, and based on a pulse signal output from the encoder, an encoder pulse is generated. By controlling the count values of the speed and the number of pulses, the control device provided in the head box controls the rotation speed and the rotation amount of the motor. By such an operation, the lifting / lowering speed of the shielding member is appropriately adjusted, and the lifting / lowering stop position of the shielding member is controlled.

  However, when the elevating cord (including the cord-like cord or the tape-like elevating tape) elongates due to a change in temperature environment or aging, an error occurs in the current position data (height data) in the management of the number of encoder pulses, As a result, a displacement occurs.

  Therefore, in the electric blind, the upper limit switch is used to mechanically detect that the shielding material is at the upper limit position, and the height data at the time of the detection is set as the initial value. Therefore, even when the current height data becomes equal to the initial value and the upper limit position signal is not output from the upper limit switch, the current height data is maintained at the initial value, and the position where the upper limit switch is always turned on is maintained. Is known so as to set an upper limit position (for example, see Patent Document 2).

JP 2011-111763 A Patent No. 4097631

  As described above, in a conventional electric shielding device such as an electric pleated screen, a physical detection switch for detecting a physical upper limit position and a physical lower limit position when a shielding material (a screen or the like) is moved up and down is provided. The range in which the shielding material can be moved up and down is determined based on the physical upper limit position and the physical lower limit position.

  According to the technique disclosed in Patent Document 2, in the electric blind, even when the elevating cord is extended due to aging, the position where the upper limit switch is turned ON is always set to the upper limit position. The positional deviation of the current position data (height data) shown can be corrected.

  However, in the technique of Patent Literature 2, although the lower limit position is configured to be variably set, the upper limit position is not variably set at a desired position below the upper limit switch. Since the upper limit cannot be set according to the user's preference, there is room for improvement. In particular, in an electric shielding device in which the shielding members are configured in a plurality of stages (a plurality of types) connected in the vertical direction, and each of the plurality of stages of the shielding members can be electrically moved up and down, a desired position is set for each shielding member. Therefore, a technique that enables the upper limit position and the lower limit position to be variably set is desired.

Furthermore, in the electric shielding device, a creep load (a load due to a continuous stress applied to the drive shaft) may occur during driving, and the creep load may cause waste of electric power, heat generation of the motor, or damage. Therefore, measures to avoid these are demanded.

  In view of the above-described problems, an object of the present invention is to make each of a plurality of vertically shielding members (upper screen, lower screen, etc.) electrically movable up and down, and for each shielding material, It is an object of the present invention to provide an electric shielding device capable of variably setting an upper limit position and a lower limit position at a desired position.

  Further, another object of the present invention is to provide an electric shielding device that prevents a creep load and electrically controls a vertical movement of a shielding member in view of the above-mentioned problem.

  An electric shielding device according to one embodiment of the present invention is an electric shielding device that enables each of a plurality of shielding members vertically connected to each other to be able to move up and down electrically, wherein the plurality of shielding members are an upper shielding member and a lower shielding member. It is characterized by comprising an upper limit setting means having a shielding material, wherein the upper limit position of the upper shielding material and the upper limit position of the lower shielding material can be individually and variably set within the range of each elevating area.

  An electric shield device according to another aspect of the present invention is an electric shield device in which each of a plurality of vertically-arranged shielding members can be vertically lifted and operated so that the plurality of shielding members are upper shielding members. And a lower shielding member, wherein a lower limit position of the upper shielding member and a lower limit position of the lower shielding member can be individually and variably set within a range of each of the ascending and descending areas, and a lower limit setting means is provided. I do.

  According to still another aspect of the present invention, there is provided an electric shielding apparatus, wherein each of a plurality of vertically arranged shielding members is capable of electrically ascending / descending operation, wherein the plurality of shielding members includes an upper shielding member. Material and a lower shielding material, the upper and lower positions of the upper shielding material and the upper and lower positions of the lower shielding material can be variably set by a series of operations individually within the range of each elevating area. It is characterized by comprising setting means.

  Further, in the electric shielding device according to the present invention, the upper limit setting means, or the lower limit setting means, or the upper and lower limit setting means, respectively, each upper limit position in the upper shielding material and the lower shielding material, or each lower limit position, Alternatively, regarding the setting of each upper and lower limit position, after receiving the first setting command, three types of buttons corresponding to the three types of buttons included in the operation signal from the external device having the three types of buttons of ascending, descending, and stopping It is characterized by including a control means for receiving a command and controlling the manual setting.

  Further, in the electric shielding device according to the present invention, the control unit includes an upper limit detection unit configured to detect a physical upper limit position of each of the upper shielding member and the lower shielding member. At the time of variably setting the upper limit position for each of the lower shielding members, control is performed such that the upper limit is set to a position lowered at a desired position of the operator by the manual setting from the physical upper limit position indicating the physical upper limit position. I do.

  Further, in the electric shielding device according to the present invention, when the desired position of the operator is set within a predetermined range from the physical upper limit position by the manual setting, the control unit may set the predetermined range from the physical upper limit position. The control is such that the position lowered to the position is set as the upper limit setting position.

  Further, in the electric shielding device according to the present invention, the control unit includes an upper limit detection unit configured to detect a physical upper limit position of each of the upper shielding member and the lower shielding member. At the time of variably setting the lower limit position for each of the lower shielding members, the lower limit is controlled from the physical upper limit position indicating the physical upper limit position to a position lowered at a desired position of the operator by the manual setting. I do.

  Further, in the electric shielding apparatus according to the present invention, the control unit includes a lower limit detection unit that detects a physical lower limit position of each of the upper shielding member and the lower shielding member. When the desired position is set within a predetermined range from the physical lower limit position indicating the physical lower limit position, control is performed such that a position raised from the physical lower limit position to a position within the predetermined range is set as a lower limit setting position. It is characterized by.

  Further, in the electric shielding device according to the present invention, the upper limit setting means, or the lower limit setting means, or the upper and lower limit setting means, respectively, each upper limit position in the upper shielding material and the lower shielding material, or each lower limit position, Alternatively, a control means is provided for controlling the automatic setting after receiving the first setting command for setting the upper and lower limit positions.

  Further, in the electric shielding device according to the present invention, the control unit includes an upper limit detection unit configured to detect a physical upper limit position of each of the upper shielding member and the lower shielding member. When the upper limit position is variably set for each of the lower shielding members, control is performed such that the upper limit is set from the physical upper limit position indicating the physical upper limit position to a position lowered at a predetermined position by the automatic setting.

  Further, in the electric shielding device according to the present invention, the control unit includes an upper limit detection unit configured to detect a physical upper limit position of each of the upper shielding member and the lower shielding member. When the lower limit position is variably set for each of the lower shielding members, control is performed such that the lower limit is set from the physical upper limit position indicating the physical upper limit position to a position lowered at a predetermined position by the automatic setting.

  Further, in the electric shielding apparatus according to the present invention, the control unit includes a lower limit detection unit configured to detect a physical lower limit position of each of the upper shielding material and the lower shielding material, and the physical lower limit position. The control is performed such that a position raised from a physical lower limit position indicating a predetermined range to a position within a predetermined range is set as a lower limit setting position.

  Further, in the electric shielding device according to the present invention, each of the upper shielding member and the lower shielding member is configured to rotate a drive shaft by driving a motor to move up and down, and the control unit serves as the upper limit detection unit. Overcurrent, abnormal waveform current, and abnormal waveform voltage of one or more abnormal waveform voltages related to driving of the motor, and detection of absence of output from an encoder that detects a rotation amount of the motor or the drive shaft. At least one of the upper and lower shielding members is configured to detect a physical upper limit position of each of the upper and lower shielding members.

  Further, in the electric shielding device according to the present invention, each of the upper shielding member and the lower shielding member is configured to rotate a drive shaft by driving a motor to move up and down, and the control unit serves as the lower limit detection unit. For each of the upper shielding material and the lower shielding material, an overcurrent related to driving the motor, an abnormal waveform current, and an abnormality detection of one or more abnormal waveform voltages, and a rotation amount of the motor or the drive shaft are determined. It is characterized in that the physical lower limit position of each of the upper shielding material and the lower shielding material is detected by at least one of the detection of no output from the encoder to be detected.

  Further, in the electric shielding device according to the present invention, an obstacle that detects the obstacle that hinders the lowering operation with respect to each of the upper shielding material and the lower shielding material, and operates to mechanically lock the rotation of the drive shaft. An object detection device is provided.

  Further, in the electric shielding device according to the present invention, the control means may include means for controlling each lower limit position of the upper shielding material and the lower shielding material so as to enable a fine adjustment operation within a range of an elevating area. Features.

  Further, the electric shielding device according to the present invention is an electric shielding device that enables the shielding material to be moved up and down electrically, and the motor that enables the shielding material to be moved up and down, and monitors an abnormal value related to driving of the motor. Control means for controlling the driving of the motor, the control means suspends the ascending operation or descending operation of the shielding material when the abnormal value is detected, and after the suspension, reversely rotates by a predetermined amount. It is characterized by having means for driving and stopping the motor.

  Further, in the electric shield device according to the present invention, the shielding member includes a multi-stage slat, and further includes a second motor that can rotate the multi-stage slat, and the control unit includes the second motor. The driving of the second motor is controlled while monitoring an abnormal value related to the driving of the motor, and when the abnormal value is detected, the rotation operation of the multi-stage slats is temporarily stopped. The apparatus further comprises means for driving and stopping the second motor so as to rotate.

  Further, in the electric shield device according to the present invention, the abnormal value includes one or more of a predetermined overcurrent, an abnormal waveform current, and an abnormal waveform voltage.

  Further, the electric shielding device according to the present invention is characterized in that the electric shielding device includes an obstacle detecting device that detects an obstacle that hinders the lowering operation of the shielding member and that operates to mechanically lock the rotation of the drive shaft.

  According to the present invention, when each of a plurality of shielding members (an upper screen, a lower screen, and the like) connected in a vertical direction can be electrically moved up and down, an upper limit position at a desired position for each shielding material, and Can set the lower limit position variably. This makes it possible to arbitrarily set the range in which the shielding material can be raised and lowered in accordance with suitability for various installation locations and user's preference, thereby improving convenience.

1A and 1B are a plan view and a front view, respectively, showing a schematic configuration of an electric shielding device according to an embodiment of the present invention. 1A is a cross-sectional view illustrating a schematic configuration of a clutch-type obstacle detection and stop device provided in an electric shield device according to an embodiment of the present invention, and FIGS. It is a perspective view showing operation of a clutch type obstacle detection stop device provided in an electric shielding device of an embodiment. It is a block diagram showing the schematic structure of the control device in the electric shielding device of one embodiment by the present invention. (A) to (d) respectively explain a “physical upper limit position” and a “physical lower limit position”, and an “upper limit setting position” and an “upper limit setting position” according to the electric shielding apparatus of one embodiment of the present invention. FIG. 1 is a schematic front view of an electric shielding device for a vehicle. 4 is a flowchart illustrating an example of variable setting control of upper and lower limit positions as Example 1 by the control device in the electric shielding apparatus according to one embodiment of the present invention. It is a flowchart which shows the example of variable setting control of the upper and lower limit position as Example 2 by the control apparatus in the electric shielding device of one embodiment of the present invention. It is a flowchart which shows the variable setting control at the time of the lower limit fine adjustment as Example 3 by the control apparatus in the electric shielding device of one embodiment of the present invention. 5 is a flowchart illustrating an example of motor control at the time of an obstacle detection operation by a control device in the electric shielding device according to the embodiment of the present invention. (A), (b) is the top view and front view which respectively show the schematic structure of the electric horizontal blind as another embodiment by this invention. (A) is a side sectional view showing a schematic configuration of a slider type obstacle detection and stop device provided in the electric shielding device according to one embodiment of the present invention, and (b) is a side sectional view showing the operation thereof. is there.

  Hereinafter, an electric shield 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. 1, the upper side and the lower side in the drawing are upward (or upper) and lower (or lower), respectively, according to the hanging direction of the shielding member. ), 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. Further, in the example described below, the side to be viewed is the front side (or the indoor side) and the opposite side is the rear side (or the outdoor side) with respect to the front view of the electric shielding device shown in FIG.

(overall structure)
1 (a) and 1 (b) are a plan view and a front view, respectively, showing a schematic configuration of an electric shielding device according to an 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, the present invention is not limited to this as long as it allows a plurality of shielding members connected in the vertical direction to be lifted and lowered by the rotation of the drive shaft, and may be, for example, an electric horizontal blind, an electric lifting curtain, or the like.

  Further, in the electric pleated screen according to the embodiment shown in FIGS. 1A and 1B, the upper screen 6U as the upper shielding material and the lower shielding material that can be individually raised and lowered by a plurality of types of lifting cords 3U and 3L. Although an example in which two types of shielding materials of the lower screen 6L are vertically connected is shown, an electric pleated screen in which three or more types of shielding materials are vertically connected may be used.

  In the electric pleated screen according to the embodiment shown in FIGS. 1A and 1B, an upper screen 6 </ b> U that can be bent in a zigzag shape from a head box 1 is suspended and supported. Mounted on top. The head box 1 is fixed to a mounting surface such as a ceiling surface via a bracket 15.

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

  The take-up drums 51A and 51B are rotatably supported by being arranged in front and rear with respect to each of the support members 5 arranged at appropriate places (in this example, two places on the left and right) in the head box 1. Then, cam clutches 52A and 52B are provided at one axial end of each of the winding drums 51A and 51B. Each of the winding drum 51A and the cam clutch 52A and each of the winding drum 51B and the cam clutch 52B have the same shape.

  The upper end of an elevating cord 3L (in this example, a cord-like cord, but may be a tape-shaped elevating tape) is attached to each of the winding drums 51A so as to be wound up or rewindable. In this example, the lower end penetrates the upper screen 6U, the intermediate rail 4, and the lower screen 6L, and is attached to the bottom rail 7. The take-up drum 51A is formed so that the diameter gradually decreases toward one side in the axial direction. In this example, the cord-shaped elevating cord 3L is sequentially spirally wound around the take-up drum 51A. I have.

  Further, the upper end of an elevating cord 3U (in this example, a cord-like cord, but a tape-like elevating tape may be used) is attached to each winding drum 51B so as to be wound or rewindable. The lower end of 3U penetrates upper screen 6U in this example, and is attached to intermediate rail 4. The winding drum 51B is formed so that the diameter gradually decreases toward one side in the axial direction, and in this example, the cord-shaped elevating cord 3U is spirally wound around the winding drum 51B sequentially. I have.

  A drive shaft 2A is inserted through the center shaft of each 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. This is transmitted to the shaft 2A.

  Similarly, the drive shaft 2B is inserted through the center shaft of each 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. The force is transmitted to the drive shaft 2B.

  One end of the drive shaft 2A is connected to an output shaft of the motor 9A via a drive shaft coupler 20A, and rotation of the output shaft of the motor 9A is transmitted to the drive shaft 2A. Accordingly, the drive shaft 2A is rotated by the driving force of the motor 9A, and the lifting / lowering cord 3L is wound or unwound by the winding drum 51A based on the rotation of the drive shaft 2A, so that the bottom rail 7 can be moved up and down. Thus, the lower screen 6L can be moved up and down, and further, the upper screen 6U and the intermediate rail 4 can be moved up and down. Since the winding drum 51A uses the tension (self-weight of each screen and each rail) related to the lifting cord 3L when the lower screen 6L is lowered, the driving force is supplied to the winding drum 51A via the cam clutch 52A. To the drive shaft 2A, and the drive force of the drive shaft 2A is adjusted to control the lowering.

  In addition, one end of the drive shaft 2B is connected to an output shaft of the motor 9B via a drive shaft coupler 20B, and rotation of the output shaft of the motor 9B is transmitted to the drive shaft 2B. Accordingly, the drive shaft 2B is rotated by the driving force of the motor 9B, and the lifting / lowering cord 3U is wound or unwound by the winding drum 51B based on the rotation of the drive shaft 2B, so that the intermediate rail 4 can be moved up and down. Thus, the upper screen 6U can be moved up and down. Since the winding drum 51B uses the tension (the weight of the upper screen 6U and the intermediate rail 4) related to the lifting cord 3U when the upper screen 6U descends, the driving force is wound via the cam clutch 52B. The driving force is transmitted from the drum 51B to the driving shaft 2A, and the driving force of the driving shaft 2B is adjusted to perform the lowering control.

  The drive control of each of the motors 9A and 9B is performed by a control device 10 provided in the headbox 1. In the head box 1, a DC power supply 11 for supplying power to the motors 9A and 9B and the control device 10 is provided. 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 transmits various commands included in the operation signal. Various controls of the corresponding electric shielding device are performed. For example, by configuring the motors 9A and 9B with 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 rotation speed of the motors 9A and 9B. Can be controlled. Encoders 8A and 8B for detecting the rotation speed and rotation amount of each of the drive shafts 2A and 2B are provided in the head box 1, and the control device 10 controls the pulse signals output from the encoders 8A and 8B. On the basis of this, the speed of the encoder pulses and the count value of the number of pulses are managed, and the rotation speed and the rotation amount of the motors 9A and 9B are controlled. 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 controls the upper screen 6U or the lower screen 6U. The vertical stop position of the screen 6L is controlled.

  In the electric pleated screen of the present embodiment configured as described above, the intermediate rail 4 is pulled up to just below the head box 1, and the upper screen 6 </ b> U is folded between the head box 1 and the intermediate rail 4. By lowering 7, the lower screen 6L is suspended from the head box 1.

  Also, when the intermediate rail 4 is lowered above the bottom rail 7 with the bottom rail 7 lowered to the lower limit, the lower screen 6L is folded between the intermediate rail 4 and the bottom rail 7, and The upper screen 6 </ b> U is suspended from the rail 4. 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, the degree of freedom in adjusting the amount of light can be increased.

  Then, if the bottom rail 7 is lowered to the lower limit and the intermediate rail 4 is positioned between the head box 1 and the bottom rail 7, soft light transmitted through the upper screen 6 </ b> U, which is a daylighting cloth, can be collected. it can.

  When the bottom rail 7 is pulled up to the upper limit to be opened, the bottom rail 7 is pulled up together with 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. can do.

(Clutch type obstacle detection and stop device)
By the way, when the intermediate rail 4 or the bottom rail 7 comes into contact with an obstacle and the lowering thereof is hindered, a clutch-type obstacle detection and stop device is operated and the drive shaft 2A or 2B is locked. That is, when the intermediate rail 4 or the bottom rail 7 comes into contact with an obstacle, the take-up drum 51A and the cam clutch 52A, and the take-up drum 51B and the cam clutch 52B, which are supported by the support member 5, respectively, 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 support member 5, and the winding drum 51B and the cam clutch 52B are configured as a clutch-type obstacle detection and stop device as shown in FIG.
Hereinafter, the clutch type obstacle detection and stop device will be briefly described.

  In addition, since the winding drum 51B and the cam clutch 52B have the same structure as the winding drum 51A and the cam clutch 52A, respectively, in FIG. FIG. 3 is a cross-sectional view of a configuration of a winding drum 51A and a cam clutch 52A that function as a clutch-type obstacle detection and stop device.

  As shown in FIG. 2A, in the clutch-type obstacle detection and stop device, a take-up drum 51 </ b> A and a cam clutch 52 </ b> A are supported by a support portion 50 of a support member 5. It is connected to the winding drum 51A through the intermediary.

  The support member 5 is fixed by fitting a snap fit 501 protruding 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, 503 formed at both left and right ends of the support portion 50. 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. It is pivoted.

  The snap fit 501 is formed with a lead-out opening for leading up / down the winding cord 3L from a predetermined position. Further, a braking projection 504 is formed on the bottom surface on the left side of the support portion 50 in the figure.

  The winding drum 51A 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 in the figure. A drive shaft 2A is penetrated through the center of a pulley cap 54 fitted to the right end in the drawing of the winding drum 51A so as to be relatively rotatable.

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

  The diameter of the outer peripheral surface of the braking portion 522 is set to a size that can slide with the inner peripheral surface of the engaging portion 511 of the winding drum 51A. One or a plurality of brake claws 523 are formed at the end of the brake portion 522 on the side of the cylinder portion 521 so as to protrude in a saw-tooth shape, and can be engaged with the brake protrusion 504 of the support portion 50.

  When the rotation of the braking claw 523 in the circumferential direction is prevented by engaging with the braking protrusion 504, the cam clutch 52A cannot be rotated relative to the support portion 50.

  The cam clutch 52A is assembled so that the side wall of the braking portion 522 has a predetermined rotational play with the take-up drum 51A via the rotary drum 53 and cannot rotate relative to the take-up drum 51A. It has a cam structure that can be relatively moved (slidable) along the direction.

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

  The rotary drum 53 is formed with a sliding convex portion 531 protruding radially outward. The rotating drum 53 is assembled to the cam clutch 52A such that the sliding convex portion 531 is located inside the sliding hole 524 of the cam clutch 52A, and the rotating drum 53 has the sliding convex portion 531 having the sliding hole 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 located at one end of the sliding hole 524, the cam clutch 52A is located closest to the take-up pulley 9 (the right side in FIG. 2A). The engagement state between 523 and braking projection 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 52A slides in the axial direction and moves to the most anti-winding pulley 9 side (the left side in FIG. 2A). Therefore, the braking claw 523 and the braking protrusion 504 are engaged.

  When the braking claw 523 and the braking projection 504 are engaged, the rotation of the cam clutch 52A is blocked, and at this time, the sliding projection 531 moved to the other end of the sliding hole 524 further rotates. Therefore, the rotation of the rotary drum 53 is stopped, and the rotation of the drive shaft 2A that is connected to the rotary drum 53 so as not to rotate relatively is also stopped.

  Therefore, when the cam clutch 52A relatively moves in the axial direction of the winding drum 51A and the braking claw 523 is engaged with the braking projection 504, the cam clutch 52A is locked with respect to the support portion 50 so as not to rotate relatively. You. Further, when the engagement state between the braking claw 523 and the braking protrusion 504 is released, the cam clutch 52 </ b> A becomes rotatable relative to the support portion 50.

  A rotary drum 53 is housed inside the cam clutch 52A in the radial direction. The rotary drum 53 has a substantially cylindrical shape, has a predetermined rotational play with respect to the winding drum 51A, and cannot rotate relatively, and does not relatively move in the axial direction. Is mounted as follows. The drive shaft 2A penetrates through the cylindrical portion 515 so as to be relatively rotatable, but the rotary drum 53 rotates integrally with the drive shaft 2A.

  As described above, when the drive shaft 2A is rotated in the direction in which the shielding member (the lower screen 6L) is lifted, the rotation is transmitted to the rotating drum 53. At this time, the rotating drum 53 is rotated relative to the winding drum 51A and the cam clutch 52A during the predetermined rotation play.

  In this case, the engagement state between the braking claw 523 of the cam clutch 52A and the braking projection 504 of the support portion 50 is released, and the cam clutch 52A can rotate relative to the support portion 50. Then, the rotation drum 53 cannot rotate relative to the cam clutch 52A and the take-up drum 51A by rotation of the predetermined rotation play or more.

  Therefore, when the drive shaft 2A is further rotated in the pulling-up direction, the rotary drum 53 is rotated in the pulling-up direction integrally with the cam clutch 52A and the winding drum 51A, and the shielding member (the lower screen 6L) is pulled up. Will be

  On the other hand, when the drive shaft 2A lowers the shielding material (lower screen 6L), the lower shaft 6L and the bottom rail 7 are used to perform the lowering, so that the lowering drive force is applied from the winding drum 51A to the drive shaft 2A. It is transmitted toward.

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

  Here, FIGS. 2B to 2E show the state in which the bottom rail 7 collides with an obstacle while the shield (lower screen 6L) is being lowered. 4) schematically illustrates the operation of the winding drum 51A and the cam clutch 52A functioning as a clutch-type obstacle detection and stop device in ()). In FIG. 2D and FIG. 2E, a single brake claw 523 is shown in a simplified manner, but a plurality of brake claws 523 can be used.

  First, as shown in FIG. 2B, when the lowering operation of the shielding material (the lower screen 6L) is performed, before the bottom rail 7 collides with an obstacle, the lifting / lowering cord 3L is wound from the winding drum 51A. The lower screen 6L is returned. A tension in the pull-out direction is applied to the lifting cord 3L wound on the winding drum 51A by its own weight such as the bottom rail 7, and the rotation of the cam clutch 52A causes the winding drum 51A to rotate by its own weight, thereby causing the drive shaft 2A to rotate. The rotation of its own weight is controlled by the rotation control. At this time, the sliding protrusion 531 is located at one end of the sliding hole 524, and the cam clutch 52A is located closest to the take-up pulley 9 (the right side in FIG. 2A). The state of engagement with the braking projection 504 has been released.

  Then, as shown in FIG. 2C, when the bottom rail 7 collides with an obstacle, the tension of the lifting cord 3L in the pull-out direction is lost, and the rotation of the winding drum 51A stops, but the rotating drum 53 and the cam clutch 52A. In addition, a rotation difference occurs because the drive shaft 2A maintains the rotation. However, the rotating drum 53 is rotated relative to the winding drum 51A only during the predetermined rotation play.

  Then, the sliding convex portion 531 is guided by the sliding hole 524, and as shown in FIG. 2D, during the lapse of the predetermined rotation play of the rotating drum 53 along with the stop of the rotation of the winding drum 51A. The cam clutch 52A starts relative movement (slide) in the axial direction while rotating.

  Then, as shown in FIG. 2E, the brake claw 523 of the cam clutch 52A is engaged with the brake protrusion 504 during the lapse of the predetermined rotation play of the rotary drum 53 following the stop of the rotation of the winding drum 51A. By doing so, rotation in the circumferential direction is prevented, and the cam clutch 52A cannot be rotated relative to the support portion 50. The rotation of the cam clutch 52A is prevented. At this time, the sliding protrusion 531 moved to the other end of the sliding hole 524 cannot rotate any more, so that the rotation of the rotating drum 53 is stopped. The rotation of the drive shaft 2A, which is connected so as to be unable to rotate relatively, also stops. As described above, the cam clutch 52A cannot rotate relative to the support portion 50, and when the predetermined rotational play of the rotary drum 53 has elapsed, the rotation of the rotary drum 53 also stops, and the rotation of the drive shaft 2A is locked.

  In the example shown in FIG. 2, the cam clutch 52 </ b> A is assembled such that the side wall of the braking portion 522 has a predetermined rotational play with the take-up drum 51 </ b> A via the rotary drum 53 and cannot rotate relative to the winding drum 51 </ b> A. A cam structure in which a sliding hole 524 formed in the cam clutch 52A guides a sliding convex portion 531 formed in the rotary drum 53 within a play range, thereby enabling relative movement (sliding) in the axial direction. However, the cam structure for mechanically locking the drive shaft 2A is not limited to this example, and the rotation of the drive shaft 2A is mechanically stopped when the take-up drum 51A stops rotating due to a physical obstacle. Various forms are conceivable as long as the cam clutch structure is designed to stop the motor at a constant speed.

  For example, instead of the rotary drum 53 and the cam clutch 52A, a cam clutch having a braking claw 523 that can be engaged with the braking protrusion 504 and a sliding protrusion 531 is formed, and the cam clutch is formed inside the winding drum 51A. It is possible to adopt a configuration in which it is supported by a peripheral wall. In this case, the cam clutch cannot rotate relative to the drive shaft 2A, but has a structure that allows relative movement (slide movement) within a predetermined range with respect to the winding drum 51A in the axial direction. 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 in the inner peripheral wall of the winding drum 51A can be provided.

(Configuration of control device)
FIG. 3 is a block diagram illustrating a schematic configuration of the control device 10 in the electric shielding device according to the embodiment of 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 control 22, an infrared remote control 23, or a personal computer (PC) 24, the control device 10 responds to various commands included in the operation signal. Various controls of the shielding device are performed. For example, the control device 10 controls the speed and amount of rotation of the motors 9A and 9B by managing the speed of the encoder pulse from the encoder 12 and the count value of the number of pulses, and raises and lowers each shielding material (each screen and each rail). The speed is appropriately adjusted, and the position at which the shielding material stops moving up and down is controlled.

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

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

  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 by a wireless LAN (including short-range wireless communication).

  The personal computer (PC) 24 outputs an operation signal to the control device 10 by wired connection to the control device 10 (or by wireless connection via a wireless LAN).

  Here, the operation signal includes an ascending command instructing an ascending operation of each shielding material (each screen and each rail), a descending command instructing a descending operation of each shielding material, and a stop instructing to stop the elevating operation of each shielding material. And at least a command for setting the upper and lower limit positions of each shielding material. In addition, these various commands for instructing the raising and lowering of each shielding material can be associated with “% instruction operation” indicating the opening ratio of each shielding material.

  Further, when the operator performs the raising operation of each shielding material (each screen and each rail) with the wired switch 21, the wireless remote controller 22, or the infrared remote controller 23, the “△ button” as illustrated in FIG. 1 is pressed. Can be used to transmit an ascending command. When performing a descending operation, a descending command can be transmitted by pressing the "@ button" as illustrated in FIG. 1, and when performing a stopping operation of the ascending and descending operation, as illustrated in FIG. A stop command can be sent by pressing the “□ button”.

  Then, the operator may provide another button with the wired switch 21, the wireless remote controller 22, or the infrared remote controller 23 when it is desired to variably set the upper and lower limit positions of each shielding member. However, in the present embodiment, as will be described in an example which will be described later, another button related to the setting mode is not required, and for example, when the above-mentioned “□ button” + “△ button” is pressed simultaneously for a predetermined time, the upper limit position is set. The control device 10 operates to start and set the variable setting control by simultaneously pressing the “□ button” + “▽ button” for a predetermined time for the lower limit position. Then, even after the transition to the setting mode, the control device 10 can control the elevating operation of the shielding material to be set by the “△ button”, “▽ button”, and “□ button”. Whether the operation mode is the setting mode or the setting mode is made to be distinguished by the operator by turning on a red LED or a green LSD provided on the electric shield device or the wired switch 21, the wireless remote controller 22, or the infrared remote controller 23. (Not shown).

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

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

  The wireless signal transmission / reception unit 104 is a functional unit that receives an operation signal from the wireless remote controller 22 and outputs the operation signal to the microcomputer unit 101. The wireless signal transmission / reception unit 104 enables mutual communication between the microcomputer unit 101 and the wireless remote controller 22. Commands can be exchanged.

  The wired signal transmitting / receiving 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 the PC 24 and outputs the operation signal to the microcomputer unit 101. It is possible to communicate with each other and exchange detailed commands related to operations.

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

  The 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 the motor driving units 107a and 107b, respectively, and notify the microcomputer unit 101 of them. .

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

  The microcomputer unit 101 reads out and executes a program stored in the storage unit 102 in advance, thereby receiving an operation signal from the infrared remote controller 23 received via the infrared signal reception unit 103 and a reception signal via the wireless signal transmission / reception unit 104. From the wireless 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 the external device such as the PC 24 received via the external device IF unit 106. And processes various commands contained in the operation signal. Thus, 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, determining various commands included in the operation signal, and performing various controls of the corresponding electric shielding device. While counting the number of encoder pulses and the presence / absence of encoder pulses via pulse detectors 109a and 109b that receive pulse signals from the encoders 8A and 8B, the count value is stored in the storage unit 102 as appropriate. Function for storing and managing 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, and driving the motors 9A and 9B. Motor 9 via motor drive units 107a and 107b respectively performing , 9B, and an abnormal value (one or more of overcurrent / abnormal waveform current / abnormal waveform voltage) in the motor drive units 107a and 107b, and notifies the microcomputer unit 101 of the abnormal value. A function of monitoring the abnormal value via the units 108a and 108b is included.

(Detection of physical upper limit position and physical lower limit position)
In the electric shielding device of the present embodiment, each of the motors 9A and 9B and the control device 10 are connected by a motor harness. However, the physical upper limit position and the physical lower limit position when a screen such as a conventional electric pleated screen is raised and lowered. There is no physical detection switch for detecting Also in this case, the control device 10 detects an abnormal value (one or more of overcurrent / abnormal waveform current / abnormal waveform voltage) in the motor driving units 107a and 107b, respectively, or controls the encoder pulse for a predetermined time during operation control. Is detected, the physical upper limit position and the physical lower limit position that define the physical ascending and descending operable range of each of the upper screen 6U and the lower screen 6L can be detected.

  In particular, since the electric shielding apparatus of the present embodiment includes the clutch-type obstacle detection and stop device illustrated in FIG. 2, the lowering operation of each of the plurality of shielding members (upper screen 6U and lower screen 6L) is performed. If any one of the lower edges of the shields comes into contact with the obstacle during this time, the rotation of the drive shaft 2A (or 2B) for raising and lowering the shield in contact with the obstacle is mechanically locked. However, when the rotation control of the drive shaft 2A (or 2B) is continued by the control device 10, a creep load (a load due to a continuous stress applied to the drive shaft) is generated on the drive shaft 2A (or 2B). It stops with the occurrence. In other words, if the driving of the motor 9A (or 9B) is maintained despite the mechanical “stop” of the drive shaft 2A (or 2B) being activated, waste of electric power and the motor 9A (or It is necessary to avoid the risk of causing heat generation or damage in 9B).

  Therefore, in the electric shielding device of the present embodiment, under the configuration in which the micro switch is not required unlike the conventional technique, the control device 10 controls the abnormal values (overcurrent / abnormal waveform current / current) in the motor driving units 107a and 107b described above. At least one of the abnormal waveform voltages) or the detection of the absence of the input of the encoder pulse for a predetermined time during the operation control, the mechanical “stop” by the clutch type obstacle detection and stop device is grasped, and the motors 9A and 9B are detected. After temporarily stopping the driving of the motor, the creep load of the drive shaft 2A (or 2B), which locks the lowering of the shielding material in contact with the obstacle, is reduced, and the count value of the number of encoder pulses is set as a predetermined value. Control is performed so as to return the number of pulses.

  Therefore, in the present embodiment, as described above, the control device 10 detects an abnormal value (one or more of overcurrent / abnormal waveform current / abnormal waveform voltage) in the motor drive units 107a and 107b, respectively, or controls the encoder. By detecting that the input of the pulse disappears, the physical upper limit position and the physical lower limit position which define the physical operable range of the upper and lower screens 6U and 6L are detected.

  By the way, with respect to each of the upper screen 6U and the lower screen 6L, in a configuration such as a conventional electric pleated screen that determines an ascending / descending operation range based on the physical upper limit position and the physical lower limit position, compatibility with various installation locations and user It is not possible to set the upper limit or lower limit according to the user's preference, and a more convenient one has been desired.

  Therefore, in the electric pleated screen according to the present embodiment, as specifically described below, the upper and lower screens of the upper screen 6U and the lower screen 6L can be changed at desired positions by the control device 10 as desired. It is configured so that it can be set. Note that the variable setting control of the upper and lower limit positions at the desired position is not limited to the physical upper limit position and the physical lower limit position detection technique as in the present embodiment, and a physical detection switch such as a conventional electric pleated screen may be used. It can also be applied to a configuration for detecting the physical upper limit position and the physical lower limit position. In this case, when there is no advantage in controlling to return a predetermined number of pulses as the count value of the number of encoder pulses, this control is performed. Can be omitted.

(Upper limit setting position and lower limit setting position)
FIGS. 4A to 4D show the “physical upper limit position” and the “physical lower limit position”, and the “upper limit setting position” and “lower limit setting position” of the electric shielding apparatus according to an embodiment of the present invention, respectively. It is a schematic front view of the electric shielding device for description. First, in the specification of the present application, the upper limit position variably set at the desired position under the control of the control device 10 of each embodiment is referred to as “upper limit setting position”, and the lower limit position variably set at the desired position is referred to as “lower limit setting position”. This is distinguished from the “physical upper limit position” and the “physical lower limit position”.

  First, FIG. 4A shows the count value of the number of encoder pulses from the encoder 8B indicating the physical upper limit position of the upper screen 6U as the origin P0, and the encoder pulse from the encoder 8A indicating the physical upper limit position of the lower screen 6L. The count value of the number is shown as the origin P0 '. Also, the count value of the number of encoder pulses from the encoder 8B indicating the physical lower limit position of the upper screen 6U is indicated as Pmax, and the count value of the encoder pulse number from the encoder 8A indicating the physical lower limit position of the lower screen 6L is indicated as Pmax '. I have. Accordingly, the count value range of the encoder pulse number indicating the physical movable range of the upper screen 6U is Pmax−P0 = URmax, and the count value range of the encoder pulse number indicating the physical movable range of the lower screen 6L is Pmax′−. P0 '= LRmax.

  On the other hand, FIG. 4B shows a count value PUT of the number of encoder pulses from the encoder 8B indicating the variably set upper limit position of the upper screen 6U, and an encoder indicating the variably set upper limit position of the lower screen 6L. The count value PLT of the encoder pulse number from 8A is shown. In this embodiment, the count value a between P0 and PUT can be variably set, and the count value b between P0 'and PLT can be variably set. When only the upper limit setting position of each screen is variably set as described above, the count value range of the number of encoder pulses indicating the movable range during the operation of the upper screen 6U is Pmax-PUT = URmax-a, and the operation of the lower screen 6L is performed. The count value range of the number of encoder pulses indicating the movable range at the time is Pmax′−PLT = LRmax−b.

  Further, FIG. 4B shows a count value PLB of the number of encoder pulses from the encoder 8A indicating the lower limit setting position of the lower screen 6L further variably set from the state shown in FIG. 4B. In the present embodiment, the count value c between Pmax 'and PLB can be variably set. In this case, the count value range of the number of encoder pulses indicating the movable range during the operation of the lower screen 6L is LRmax−bc = LR.

  FIG. 4D shows the count value PUB of the number of encoder pulses from the encoder 8B indicating the lower limit setting position of the upper screen 6U which is further variably set from the state shown in FIG. 4C. In the present embodiment, the count value d between Pmax and PUB can be variably set. In this case, the count value range of the number of encoder pulses indicating the movable range during the operation of the upper screen 6U is URmax-ad = UR.

  Based on the above, a control example of the control device 10 of each embodiment when the upper limit position and the lower limit position are variably set at desired positions for each of the upper screen 6U and the lower screen 6L will be specifically described. .

(Embodiment 1: Variable setting control of upper and lower limit positions)
FIG. 5 is a flowchart illustrating an example of variable setting control of upper and lower limit positions as Example 1 by the control device 10 in the electric shielding apparatus according to one embodiment of the present invention. The present embodiment is an example in which the control device 10 receives a setting command related to upper and lower limit setting and performs setting control of an upper limit setting position and a lower limit setting position by an individual setting operation.

  First, the control device 10 shifts to the setting mode of the variable setting of the upper limit position by, for example, simultaneous pressing of the “□ button” + “△ button” for a predetermined time by the operator (in this example, first, the variable of the upper limit position is changed). When the setting command for the upper limit position is received (step S1), the upper shielding material (upper screen 6U) and the lower shielding material (lower screen 6L) are both set. The screen is moved up to the physical upper limit position and stopped when each screen reaches the physical upper limit position (step S2).

  At this stop position, the control device 10 sets the origins P0 and P0 ′, which are the physical upper limit positions, for both the upper shielding material (upper screen 6U) and the lower shielding material (lower screen 6L), for example, the origins P0 and P0 ′. Is set to zero (step S3). At this time, the electric shielding device is in a state shown in FIG.

  Subsequently, the control device 10 monitors whether a down command has been received under this setting operation (step S4), and waits until a down command is received (step S4: N). In this step S4, the control device 10 waits for a predetermined time until the descent command is received, and when the predetermined time has elapsed, forcibly terminates the setting operation and resets all the data related to the setting to the setting. The state before the operation may be returned.

  When receiving the lowering command in step S4 (step S4: Y), the controller 10 starts the lowering operation of the lower shielding member (lower screen 6L) and returns to the origin until receiving the stop command under this setting operation. The number of encoder pulses from P0 'is counted (steps S5, S6: N).

  When receiving the stop command in step S6 (step S6: Y), the control device 10 stops the lowering operation of the lower shielding member (the lower screen 6L). After receiving the stop command in step S6 and stopping the descending operation, when the descending command is received again, the process proceeds to step S5 to start the descending operation again, and the reception of the stop command is monitored in step S6. .

  After receiving the stop command in step S6 and stopping the descending operation, the control device 10 determines the number of encoder pulses from the origin P0 ′ by simultaneously pressing the “□ button” + “▽ button” for a predetermined time by the operator. The upper limit setting position PLT of the lower shielding material (the lower screen 6L) is set and stored in the storage unit 102 (Step S7).

  When the upper limit setting position PLT is equal to or smaller than a predetermined pulse number β (for example, β = 3 pulses) as the encoder pulse count value (“b” shown in FIG. 4B) from the origin P0 ′, It is preferable that the position of P0 ′ + β is automatically set as the upper limit setting position PLT. As a result, it is possible to reduce the pushing load on the mechanical components related to the support member 5 and the like.

  Subsequently, the control device 10 monitors whether a down command has been received under this setting operation (step S8), and waits until a down command is received (step S8: N). In step S8, the control device 10 waits for a predetermined time until a descent command is received, and when the predetermined time has elapsed, forcibly terminates the setting operation and resets all data related to the setting to the setting operation. The state before the operation may be returned.

  When receiving the lowering command in step S8 (step S8: Y), the controller 10 starts the lowering operation of the upper shielding material (upper screen 6U), and returns to the origin until receiving the stop command under this setting operation. The number of encoder pulses from P0 is counted (steps S9, S10: N).

  However, the process of step S8 is omitted, and after setting the upper limit setting position PLT of the lower shielding material (lower screen 6L) in step S7, the process proceeds to step S9 to perform variable setting control of the lower limit position of the upper screen 6U. The transition may be automatic.

  When receiving the stop command in step S10 (step S10: Y), the control device 10 stops the lowering operation of the upper shielding material (upper screen 6U). After receiving the stop command in step S10 and stopping the lowering operation, when the lowering command is received again, the process proceeds to step S9 so as to start the lowering operation again, and the reception of the stop command is monitored in step S10. .

  After receiving the stop command in step S10 and stopping the descending operation, the control device 10 increases the number of encoder pulses from the origin P0 by simultaneously pressing the “□ button” + “▽ button” for a predetermined time by the operator. The upper limit setting position PUT of the shielding material (upper screen 6U) is set and stored in the storage unit 102 (step S11).

  When the upper limit setting position PUT is equal to or less than a predetermined pulse number α (for example, α = 3 pulses) as the encoder pulse count value (“a” shown in FIG. 4B) from the origin P0, the origin P0 + α Is preferably set automatically as the upper limit setting position PUT. As a result, it is possible to reduce the pushing load on the mechanical components related to the support member 5 and the like.

  By the control so far, the variable setting control of the upper limit setting positions PLT and PUT of the upper screen 6U and the lower screen 6L is completed (see FIG. 4B). Here, in the present example, an example is described in which the process starts from the variable setting of the upper limit position and automatically shifts to the variable setting of the lower limit position. Alternatively, as shown in FIG. 5, the setting mode is continued, and after the step S11, the pressing of the "@ button" by the operator is monitored (step S12), and the process waits until a down command is received (step S12). : N), the setting control of the control device 10 may be configured to shift to the setting mode of variable setting of the lower limit position upon receiving a lowering command (Step S12: Y).

  In the present example, the control automatically shifts to the variable setting control of the lower limit position of each of the upper screen 6U and the lower screen 6L following the variable setting control of the upper limit position of the upper screen 6U and the lower screen 6L.

  That is, after setting the upper limit setting position PUT of the upper shielding material (upper screen 6U) in step S11, the control device 10 omits the process of step S12 and automatically controls the lower shielding material (lower screen 6L). Is started, and the number of encoder pulses from the origin P0 is counted until a stop command is received under the setting operation (steps S13 and S14: N).

  When receiving the stop command in Step S14 (Step S14: Y), the control device 10 stops the lowering operation of the lower shielding member (the lower screen 6L). After receiving the stop command in step S14 and stopping the descending operation, when the descending command is received again, the process proceeds to step S13 to start the descending operation again, and the reception of the stop command is monitored in step S14. .

  After receiving the stop command in step S14 and stopping the descending operation, the control device 10 determines the number of encoder pulses from the origin P0 ′ by simultaneously pressing the “□ button” + “▽ button” for a predetermined time by the operator. The lower limit setting position PLB of the lower shielding material (lower screen 6L) is set and stored in the storage unit 102 (step S15).

  When the lower limit setting position PLB is equal to or smaller than the predetermined pulse number γ (for example, γ = 3 pulses), the encoder pulse count value (“c” shown in FIG. 4C) as the difference from the physical lower limit position is smaller than the predetermined pulse number γ. Preferably, a position obtained by subtracting the predetermined pulse number γ from the encoder pulse count value Pmax ′ at the physical lower limit position (a position slightly raised from the physical lower limit position) is automatically set as the lower limit setting position PLB. As a result, it is possible to reduce the creep load of the drive shaft related to the obstacle stopping device and the like.

  After step S15, the control device 10 monitors pressing of the "@ button" by the operator (step S16), and waits until a down command is received (step S16: N). In this step S16, the control device 10 waits for a predetermined time until the descent command is received, and when the predetermined time has elapsed, forcibly terminates the setting operation and resets all data related to the setting to the setting. The state before the operation may be returned.

  When the controller 10 receives the lowering command in step S16 (step S16: Y), the controller 10 starts the lowering operation of the upper shielding material (upper screen 6U) and returns to the origin until receiving the stop command under this setting operation. The number of encoder pulses from P0 is counted (steps S17, S18: N).

  However, the process of step S16 is omitted, and after setting of the lower limit setting position PLB of the lower shielding material (lower screen 6L) in step S15, the process proceeds to step S17 to perform variable setting control of the lower limit position of the upper screen 6U. The transition may be automatic.

  When receiving the stop command in step S18 (step S18: Y), the control device 10 stops the lowering operation of the upper shielding material (upper screen 6U). After receiving the stop command in step S18 and stopping the descending operation, when the descending command is received again, the process proceeds to step S17 to start the descending operation again, and the reception of the stop command is monitored in step S18. .

  After receiving the stop command in step S18 and stopping the descending operation, the controller 10 increases the number of encoder pulses from the origin P0 by simultaneously pressing the “□ button” + “▽ button” for a predetermined time by the operator. The lower limit setting position PUB of the shielding material (upper screen 6U) is set and stored in the storage unit 102 (step S15).

  When the count value (“d” shown in FIG. 4D) of the encoder pulse as the difference between the lower limit setting position PUB and the physical lower limit position is equal to or smaller than a predetermined pulse number δ (for example, δ = 3 pulses). It is preferable that a position obtained by subtracting the predetermined pulse number δ from the encoder pulse count value Pmax at the physical lower limit position (a position slightly raised from the physical lower limit position) is automatically set as the lower limit setting position PUB. As a result, it is possible to reduce the creep load of the drive shaft related to the obstacle stopping device and the like.

  Thereby, the variable setting control of the lower limit setting positions PLB and PUB of the upper screen 6U and the lower screen 6L is completed (see FIGS. 4C and 4D).

  In this way, the upper limit position and the lower limit position can be variably set at desired positions by the control device 10 for each of the upper screen 6U and the lower screen 6L.

(Embodiment 2: Variable setting control of upper and lower limit positions)
FIG. 6 is a flowchart illustrating an example of the variable setting control of the upper and lower limit positions as Example 2 by the control device 10 in the electric shielding apparatus according to one embodiment of the present invention. The present embodiment is an example in which the control device 10 receives a setting command related to upper and lower limit settings and automatically sets and controls the upper limit setting position and the lower limit setting position.

  First, the control device 10 shifts to the setting mode of the variable setting of the upper limit position by, for example, simultaneous pressing of the “□ button” + “△ button” for a predetermined time by the operator (in this example, first, the variable of the upper limit position is changed). Starting from the setting, the process automatically shifts to the variable setting of the lower limit position. When the setting command of the upper limit position is received (step S21), only the upper shielding material (upper screen 6U) is raised to the physical upper limit position, and the upper part is moved upward. It stops when the shielding material (upper screen 6U) reaches the physical upper limit position (step S22).

  At this stop position, the control device 10 sets the origin P0 as the physical upper limit position of the upper shielding material (upper screen 6U), and sets, for example, the count value of the encoder pulse number indicating the origin P0 to zero (step S23).

  Subsequently, after setting the origin P0, the control device 10 automatically starts the lowering operation of the upper shielding material (upper screen 6U), and counts the encoder pulse count value from the origin P0 ("a" shown in FIG. 4B). ") Automatically stops at a position lowered by a predetermined number of pulses α (for example, α = 3 pulses), the position of the origin P0 + α is automatically set as the upper limit setting position PUT of the upper shielding material (upper screen 6U), and the storage unit It is stored in 102 (step S24). By setting the position of the origin P0 + α as the upper limit setting position PUT, it is possible to reduce the pushing load on the mechanical components related to the support member 5 and the like.

  Subsequently, after setting the upper limit setting position PUT of the upper shielding material (upper screen 6U), the control device 10 raises only the lower shielding material (lower screen 6L) to the physical upper limit position, and operates the lower shielding material (lower screen 6U). 6L) is stopped when it reaches the physical upper limit position (step S25).

  At this stop position, the control device 10 sets the origin P0 ', which is the physical upper limit position of the lower shielding member (the lower screen 6L), and sets, for example, the count value of the encoder pulse number indicating the origin P0' to zero (step S26). ).

  Subsequently, after setting the origin P0 ', the control device 10 automatically starts the lowering operation of the lower shielding material (the lower screen 6L), and counts the encoder pulse from the origin P0' (see FIG. 4B). (B)), automatically stops at a position lowered by a predetermined number of pulses β (for example, β = 3 pulses), and automatically sets the position of the origin P0 ′ + β as the upper limit setting position PLT of the lower shielding material (lower screen 6L). Then, it is stored in the storage unit 102 (step S27). By setting the position of the origin P0 '+ β as the upper limit setting position PLT, it is possible to reduce the pushing load on the mechanical components related to the support member 5 and the like.

  Subsequently, after setting the upper limit setting position PLT of the lower shielding material (lower screen 6L), the control device 10 automatically lowers only the lower shielding material (lower screen 6L) to the physical lower limit position and sets the lower shielding material (lower screen 6L). 6L) is stopped when it reaches the physical lower limit position (step S28).

  At the stop position at the physical lower limit position of the lower shielding member (the lower screen 6L), the control device 10 temporarily stores the count value of the number of encoder pulses from the origin P0 'at the stop position in the storage unit 102 (step S29). .

  Subsequently, the control device 10 automatically raises and stops the lower shielding material (the lower screen 6L) by a predetermined number of pulses γ (eg, γ = 3 pulses) as the number of encoder pulses from the temporarily stored stop position of the physical lower limit position. Then, the count value of the number of encoder pulses at the stop position is stored in the storage unit 102 as the lower limit setting position PLB of the lower shielding member (the lower screen 6L) (step S30). As a result, it is possible to reduce the creep load of the drive shaft related to the obstacle stopping device and the like.

  Subsequently, after setting the lower limit setting position PLB of the lower shielding material (lower screen 6L), the control device 10 automatically lowers only the upper shielding material (upper screen 6U) to the physical lower limit position and sets the upper shielding material (upper screen 6U). 6U) is stopped when it reaches the physical lower limit position (step S31).

  At the stop position at the physical lower limit position of the upper shielding material (upper screen 6U), the control device 10 temporarily stores the count value of the number of encoder pulses from the origin P0 at the stop position in the storage unit 102 (step S32).

  Subsequently, the control device 10 automatically raises and stops the upper shielding material (upper screen 6U) by a predetermined number of pulses δ (for example, δ = 3 pulses) as the number of encoder pulses from the temporarily stored stop position of the physical lower limit position. Then, the count value of the encoder pulse number at the stop position is stored in the storage unit 102 as the lower limit setting position PUB of the upper shielding material (upper screen 6U) (step S33). As a result, it is possible to reduce the creep load of the drive shaft related to the obstacle stopping device and the like.

  In this way, the upper limit position and the lower limit position can be variably set at desired positions by the control device 10 for each of the upper screen 6U and the lower screen 6L.

(Example 3: Variable setting control at the time of fine adjustment of lower limit)
FIG. 7 is a flowchart illustrating an example of variable setting control at the time of the lower limit fine adjustment as Example 3 by the control device 10 in the electric shielding apparatus according to the embodiment of the present invention. The present embodiment is an example in which the control device 10 receives a setting command related to the lower limit fine adjustment setting and controls the fine adjustment setting of the lower limit setting position. That is, when it is desired to adjust only the lower limit setting position for each of the upper screen 6U and the lower screen 6L, or after the setting control of the first and second embodiments, it is often desired to finely adjust only the lower limit setting position. Example 3 is a control example corresponding to this.

  First, the control device 10 variably sets the lower limit position (for example, the lower limit after the setting control of the first and second embodiments described above) by the operator simultaneously pressing the “□ button” + “▽ button” for a predetermined time. (Including fine adjustment of position). That is, when the control device 10 receives the setting command of the lower limit position (step S41), the operator operates the “△ button”, “▽ button”, and “□ button” to operate the upper shielding material (upper screen 6U). Is controlled, and the upper shielding member (upper screen 6U) can be positioned at a position desired by the operator.

  More specifically, after step S41, the control device 10 monitors whether or not an elevation command has been received under the setting operation (step S42), and waits until an elevation command is received (step S42: N). . In step S42, the control device 10 waits for a predetermined time until receiving the elevating command, and when the predetermined time has elapsed, forcibly terminates the setting operation and resets all the data related to the setting to the setting. The state before the operation may be returned.

  When the controller 10 receives the elevating command in step S42 (step S42: Y), the controller 10 starts the elevating operation of the upper shielding material (upper screen 6U) and returns to the origin until receiving the stop command under this setting operation. The number of encoder pulses from P0 is counted (steps S43, S44: N).

  When receiving the stop command in step S44 (step S44: Y), the control device 10 stops the raising / lowering operation of the upper shielding material (upper screen 6U). After stopping the elevating operation by receiving the stop command in step S44, when the elevating command is received again, the process proceeds to step S43 to start the elevating operation again, and the reception of the stop command is monitored in step S44. .

  After receiving the stop command in step S44 and stopping the descending operation, the control device 10 lowers the lower limit of the upper shielding material (upper screen 6U) by simultaneously pressing the “□ button” + “▽ button” for a predetermined time by the operator. The setting position PUB is set and stored (updated) in the storage unit 102 (step S45).

  Subsequently, after step S45, the control device 10 monitors whether an elevation command has been received under the setting operation (step S46), and waits until an elevation command is received (step S46: N). In step S46, the control device 10 waits for a predetermined time until receiving the elevating command, and when the predetermined time has elapsed, forcibly terminates the setting operation and resets all the data related to the setting to the setting. The state before the operation may be returned.

  When the controller 10 receives the elevating command in step S46 (step S46: Y), the controller 10 starts the elevating operation of the lower shielding material (the lower screen 6L) and returns to the origin until receiving the stop command under this setting operation. The number of encoder pulses from P0 is counted (step S47, S48: N).

  When receiving the stop command in step S48 (step S48: Y), the control device 10 stops the raising / lowering operation of the lower shielding member (the lower screen 6L). After stopping the elevating operation after receiving the stop command in step S48, when the elevating command is received again, the process proceeds to step S47 to start the elevating operation again, and the reception of the stop command is monitored in step S48. .

  After receiving the stop command in step S48 and stopping the descending operation, the control device 10 lowers the lower shielding material (lower screen 6L) by pressing the “□ button” + “▽ button” simultaneously for a predetermined time by the operator. The setting position PLB is set and stored (updated) in the storage unit 102 (step S49).

  In this way, when the controller 10 wants to adjust only the lower limit setting position for each of the upper screen 6U and the lower screen 6L, or finely adjusts only the lower limit setting position after the setting control of the first and second embodiments. can do.

  As described above, according to the electric shield device of the present embodiment, even in the case where a plurality of shield members are suspended, the range in which the shield member can be moved up and down in accordance with suitability for various installation locations and the user's preference. Arbitrary settings can be made, and convenience can be improved.

(Example of motor control during obstacle detection operation)
As described above, in the electric shielding device shown in FIG. 1, one end of the drive shaft 2A is connected to the output shaft of the motor 9A via the drive shaft coupler 20A, and rotation of the output shaft of the motor 9A is applied to the drive shaft 2A. Is transmitted. Accordingly, the drive shaft 2A is rotated by the driving force of the motor 9A, and the lifting / lowering cord 3L is wound or unwound by the winding drum 51A based on the rotation of the drive shaft 2A, so that the bottom rail 7 can be moved up and down. I have. 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. Accordingly, the driving shaft 2B is rotated by the driving force of the motor 9B, and the lifting / lowering cord 3U is wound up or rewinded by the winding drum 51B based on the rotation of the driving shaft 2B, so that the intermediate rail 4 can be moved up and down. I have.

  Then, as described with reference to FIG. 2, the winding drum 51A and the cam clutch 52A, and the winding drum 51B and the cam clutch 52B supported by the support member 5 perform the “obstacle detection” and It functions as a clutch-type obstacle detection and stop device that mechanically “stops” each drive shaft. This obstacle detection stop device operates when the intermediate rail 4 or the bottom rail 7 contacts an obstacle (including when it contacts a physical lower limit position such as a floor surface) and its lowering is prevented. , The drive shaft 2A or 2B is locked.

  In particular, since the electric shielding apparatus of the present embodiment includes the clutch-type obstacle detection and stop device illustrated in FIG. 2, the lowering operation of each of the plurality of shielding members (upper screen 6U and lower screen 6L) is performed. If any one of the lower edges of the shields comes into contact with the obstacle during this time, the rotation of the drive shaft 2A (or 2B) for raising and lowering the shield in contact with the obstacle is mechanically locked. However, when the rotation control of the drive shaft 2A (or 2B) is continued by the control device 10, a creep load (a load due to a continuous stress applied to the drive shaft) is generated on the drive shaft 2A (or 2B). It stops with the occurrence. In other words, if the driving of the motor 9A (or 9B) is maintained despite the mechanical “stop” of the drive shaft 2A (or 2B) being activated, waste of electric power and the motor 9A (or It is necessary to avoid the risk of causing heat generation or damage in 9B).

  Therefore, as described above, in the electric shield device of the present embodiment, under the configuration in which the micro switch is not required as in the conventional technique, the control device 10 controls the motor drive unit 107a by the abnormality detection units 108a and 108b described above. , 107b, or the detection of the absence of the input of the encoder pulse for a predetermined time during the operation control by the clutch type obstacle detection / stop device. After stopping the driving of the motors 9A and 9B, the creep load of the drive shaft 2A (or 2B), which locks the lowering of the shielding material in contact with the obstacle, is reduced, and the quality is improved. For this purpose, control is performed so that a predetermined pulse number is returned as the count value of the encoder pulse number.

  More specifically, referring to FIG. 8, representatively, the drive shaft 2A is rotated by the driving force of the motor 9A, and the lifting cord 3L is rewound by the winding drum 51A based on the rotation of the drive shaft 2A. During the lowering control of the bottom rail 7, the bottom rail 7 located at the lower end of the shielding material (the lower screen 6L) comes into contact with an obstacle (including when the bottom rail 7 comes into contact with a physical lower limit position such as a floor surface). An embodiment of control of the motor 9A by the control device 10 when the object detection stop device operates will be described. FIG. 8 is a flowchart showing an example of control of the motor 9A at the time of the obstacle detection operation by the control device 10 in the electric shielding device of the present embodiment shown in FIG.

  First, the control device 10 transmits an operation signal including a descending command for instructing the bottom rail 7 to descend 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). When receiving (Step S51), the lowering control of the shielding material (in this example, the bottom rail 7) is performed (Step S52).

  During this descending control, the control device 10 receives a notification from the abnormality detection unit 108a that detects an abnormal value (one or more of overcurrent / abnormal waveform current / abnormal waveform voltage) in the motor drive unit 107a that drives the motor 9A. The abnormality detection output related to the motor drive of the motor 9A is monitored (step S53), and the lowering control of the shielding material (in this example, the bottom rail 7) according to the lowering command is continued until the abnormal value is detected (step S54: N). ).

  In addition, the abnormality detection unit 108a sets an abnormal value in the motor drive unit 107a as an overcurrent that exceeds a predetermined threshold value of the motor current, and an abnormal current or abnormal waveform when the motor current or the voltage waveform exceeds a predetermined threshold value. It can be preset as a voltage. The same applies to the detection of an abnormal value in the motor drive unit 107b by the abnormality detection unit 108b. Therefore, the abnormal value related to the motor drive can be one or more of a predetermined overcurrent, an abnormal waveform current, and an abnormal waveform voltage.

  When detecting an abnormal value related to motor driving of the motor 9A (step S54: Y), the control device 10 determines that the rotation of the drive shaft 2A has been mechanically stopped by the obstacle detection and stop device, The motor drive related to the lowering control of the material (in this example, the bottom rail 7) is temporarily stopped (Step S55), and after the motor drive is temporarily stopped based on the detection of the abnormality of the motor drive, the shielding material (in this example, the bottom rail 7) is stopped. In the ascending direction of 7), the motor is driven to stop the drive shaft 2A in the reverse direction by a predetermined amount until the creep load on the drive shaft 2A (the load due to the continuous stress applied to the drive shaft) is eliminated (Step S56). .

  This prevents waste of power, heat generation or damage of the motor 9A, and keeps the creep load on the drive shaft 2A in a state where it disappears. And stable operation can be maintained. The same applies to the control of the motor 9B when the obstacle detection and stop device is operating while the intermediate rail 4 is moving down.

  Meanwhile, in FIG. 8, the motor 9A (9B) at the time of operation of the obstacle detection and stop device during the lowering control of the shielding material (contact of an obstacle includes contact with a physical lower limit position such as a floor surface). Although the control example of the control device 10 for ()) has been described, the same control can be performed during the raising control of the shielding material. That is, even when the control device 10 detects an abnormal value related to motor driving that occurs when the raising operation of the shielding member is abutted against the head box 1, the motor driving based on the motor driving abnormality detection is temporarily performed. After stopping, the motor may be controlled to stop by rotating the drive shaft 2A (or 2B) in the descending direction of the shielding member by a predetermined amount in the reverse direction. Therefore, the control device 10 has means for temporarily stopping the raising operation or the lowering operation of the shielding material when detecting an abnormal value related to the motor drive, and after performing the temporary stop, performing a motor drive so as to reversely rotate by a predetermined amount and stopping the motor. It is configured as follows.

  As described above, the present invention has been described with reference to the example of the specific embodiment. However, the present invention is not limited to the example of the above-described embodiment, and can be variously modified without departing from the technical idea thereof. For example, the lifting cord in the specification of the present application includes a cord-like cord or a tape-like lifting tape. Further, the electric shielding device is not limited to the above-described electric pleated screen, and can be applied to other electric blinds such as an electric horizontal blind.

  In particular, the motor control at the time of the obstacle detection operation shown in FIG. 8 is not limited to the electric shielding device capable of raising and lowering a plurality of vertically-arranged shielding materials, but is also an electric motor that enables one shielding material to be raised and lowered. The present invention is also applicable to a shielding device (for example, an electric horizontal blind or an electric lift curtain).

  For example, FIGS. 9A and 9B are a plan view and a front view, respectively, showing a schematic configuration of an electric horizontal blind as another embodiment according to the present invention. The same components as those shown in FIG. 1 are denoted by the same reference codes.

  In the electric horizontal blind shown in FIGS. 9 (a) and 9 (b), a multi-stage slat 6 is suspended via a ladder cord 12 which is hung from an appropriate place (for example, near the center and both right and left sides) of the headbox 1. The bottom rail 7 is suspended and supported at the lower end of the ladder cord 12. That is, the multi-stage slats 6 and the bottom rail 7 located at the lower end thereof constitute one shielding material.

  An elevating cord 3 is suspended from the head box 1 and a bottom rail 7 is attached to a lower end of the elevating cord 3.

  Therefore, the support members 5 of the present embodiment are disposed at appropriate places in the head box 1 (for example, near the center and the left and right sides), and the ladder cord 12 and the lifting cord 3 are suspended by the respective support members 5. It is configured to support below.

  More specifically, each support member 5 shown in FIGS. 9A and 9B has a winding drum 51A configured in the same manner as the embodiment shown in FIG. A tilt drum 55 that enables relative movement of the warp yarns before and after the ladder cord 12 is rotatably supported. As in the embodiment shown in FIG. 1, a cam clutch 52A is provided at one axial end of the winding drum 51A.

  The winding drum 51A is configured so that the upper end of the elevating cord 3 of the present embodiment (in this example, a cord is a cord, but a tape-shaped elevating tape may be attached), and the winding or rewinding is possible. In this example, the lower end of the elevating cord 3 penetrates through an insertion hole (not shown) provided in each slat 6 (it may be formed along the front edge or the rear edge of the slat 6; A notch for guiding the hanging of the cord 3 may be provided.), And is attached to the bottom rail 7.

  As in the embodiment shown in FIG. 1, also in this embodiment, the drive shaft 2A is inserted through the central axes of the winding drum 51A and the cam clutch 52A, and the cam clutch 52A rotates the drive shaft 2A. And the driving force of the winding drum 51A is transmitted to the drive shaft 2A. One end of the drive shaft 2A is connected to an output shaft of the motor 9A via a drive shaft coupler 20A, and rotation of the output shaft of the motor 9A is transmitted to the drive shaft 2A. Accordingly, the drive shaft 2A is rotated by the driving force of the motor 9A, and the lifting / lowering cord 3 is wound or unwound by the winding drum 51A based on the rotation of the drive shaft 2A, so that the bottom rail 7 can be moved up and down. Thereby, the multi-stage slats 6 can be raised and lowered. Since the winding drum 51A uses the tension (mainly the weight of the bottom rail 7) of the lifting cord 3 when the lower screen 6L is lowered, the driving force is transmitted from the winding drum 51A via the cam clutch 52A. The driving force is transmitted to the driving shaft 2A, and the driving force of the driving shaft 2A is adjusted to perform the lowering control.

  On the other hand, in each of the tilt drums 55, the drive shaft 2C is inserted through the center axis thereof so as not to rotate relatively. One end of the drive shaft 2C is connected to the output shaft of the motor 9C via the drive shaft coupler 20C. Is transmitted to the drive shaft 2C. Therefore, the drive shaft 2C is rotated by the drive force of the motor 9C, and the relative movement of the warp yarns before and after the ladder cord 12 is enabled based on the rotation of the drive shaft 2C. Can be tilted.

  The drive control of each of the motors 9A and 9C is performed by a control device 10 provided in the headbox 1. In the head box 1, a DC power supply 11 for supplying electric power to the motors 9A and 9C and the control device 10 is provided. 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 transmits various commands included in the operation signal. Various controls of the corresponding electric shielding device are performed. For example, by configuring the motor 9A as a DC motor and the motor 9C as a stepping motor, the control device 10 controls the duty ratio of the pulse signal supplied to the motors 9A and 9C. The rotation speed can be controlled. Encoders 8A and 8C for detecting the rotational speeds and amounts of the drive shafts 2A and 2C are provided in the headbox 1, and the control device 10 controls the pulse signals output from the encoders 8A and 8C. Based on this, the speed of the encoder pulses and the count value of the number of pulses are managed to control the rotation speed and rotation amount of the motors 9A and 9C. By such an operation, the control device 10 controls the vertical movement and the rotation of the slat 6 in response to various commands included in the operation signal.

  Therefore, also in the embodiment shown in FIGS. 9A and 9B, the control device 10 suspends the raising operation or the lowering operation of the shielding material when detecting an abnormal value related to the motor drive, and after the suspension, It is configured to have a means for performing a motor drive so as to reversely rotate by a predetermined amount and stopping the motor. In particular, also in the embodiment shown in FIGS. 9A and 9B, the motor control at the time of the obstacle detection operation shown in FIG. 8 can be applied, so as to waste electric power, generate heat of the motor 9A, or damage the motor 9A. , And the creep load on the drive shaft 2A is kept in a state where it is eliminated, so that an excessive load on the obstacle detection and stop device can be reduced, and quality and stable operation can be maintained.

  Note that the control device 10 uses the “motor 9C” instead of the “motor 9B” as the control target in the above-described block unit illustrated in FIG. 3, and the “encoder 8C” that functions similarly to the “encoder 8B”. The driving units 107a and 107b can be similarly configured by using motor drivers for driving the motors 9A and 9C, respectively. Also in the embodiment shown in FIG. 8, the abnormality detection unit 108a detects an abnormal value (one or more of overcurrent / abnormal waveform current / abnormal waveform voltage) in the motor driving unit 107a and notifies the microcomputer unit 101 of the abnormality. It is a functional unit that performs In the embodiment shown in FIGS. 9A and 9B, it is preferable to provide the abnormality detection unit 108b. That is, the control device 10 temporarily stops the turning operation of the shielding member (slat 6) when detecting an abnormal value related to the driving of the motor 9C of the turning operation of the shielding member (slat 6), and after the temporary stop, stops. It can be configured to have a means for performing a motor drive so as to perform a fixed reverse rotation and stopping the motor.

(Modification of Obstacle Detection Stop Device)
In the example of the above-described embodiment, the example in which the clutch type illustrated in FIG. 2 is used as the obstacle detection and stop device that operates so as to mechanically lock the rotation of the drive shaft 9A (or 9B or 9C) has been described. It is not necessary to limit to this. For example, a slider type can be used instead of the clutch type.

  FIG. 10A is a side sectional view showing a schematic configuration of a slider type obstacle detection and stop device provided in the electric shielding device according to one embodiment of the present invention, and FIG. 10B shows the operation thereof. It is a side sectional view. The same components as those described above are denoted by the same reference numerals. Here, a slider-type obstacle detection and stop device provided for the winding drum 51A shown in FIG. 9 will be described as a representative.

  As shown in FIG. 10A, the take-up drum 51A is rotatably supported by the support portion 50 of the support member 5, but in this example, a ratchet member 59 is provided at one end of the take-up drum 51A. Is fixed. A flange 591 is formed on the ratchet member 59, and a ratchet wheel 592 is formed around the entire circumference on the outside of the flange 591. A shaft portion 593 is formed on the central axis of the ratchet member 59, and a drive shaft 2A having a hexagonal cross section is inserted through the shaft portion 593 so as not to rotate relatively. Therefore, when the drive shaft 2A rotates, the ratchet member 59 and the winding drum 51A rotate integrally.

  A slider 52 is provided below the ratchet member 59. The slider 52 grasps a guide piece 50 a extending in the front-rear direction below the side surface of the support portion 50, and is formed on the bottom surface of the support portion 50. Is supported on a part of the upper surface.

  In addition, a stopper 52e protruding downward is provided on the lower surface on the tip end side of the slider 52, and the stopper 52e is engaged with an opening 56b formed in a part of the bottom plate 56. Accordingly, the slider 52 can slide in the front-rear direction within a predetermined range in the support portion 50 in a state where the backlash is suppressed.

  The slider 52 is formed with a through-hole (not shown) through which the lifting cord 3 (corresponding to the lifting cord 3U or 3L in the example shown in FIG. 1) is penetrated. A pulley 58 for guiding is pivotally supported. Note that the pulley 58 is not necessarily provided.

  Further, a claw 52a is protruded from the upper surface of the slider 52 on the base end side. The claw 52a has a concave portion 52b formed at one end of the ratchet member 59 and having a shape corresponding to the tooth shape of the ratchet wheel 25. Protrusions 52c and 52d are formed at the distal end and the proximal end of the concave portion 52b, respectively. .

  The slider 52 is provided on the bottom plate 56 so as to be slidable in a predetermined range in the front-rear direction with a guide piece 50a. The compression spring 57 is fitted into a through hole 56a provided in the bottom plate 56, and the compression is performed. By making the outer end of the spring 57 abut on the lower end on the base end side of the slider 52 as shown in the figure, the compression spring 57 always moves the slider 52 in one direction (left direction in the figure). It is energizing.

  When the load of the rail (in this example, the bottom rail 7) is applied to the lifting cord 3, the lifting cord 3 is in an extended state as shown in FIG. The slider 52 is biased in the other direction (rightward in the figure) via the pulley 58 to compress the compression spring 57, and the claw 52 a is separated from the ratchet wheel 25.

  Therefore, when the slider 52 is in a state where the claw 52a is separated from the ratchet wheel 25 with respect to the ratchet member 59 as shown in FIG. 10A, the ratchet member 59 and the winding The take-up drum 51A rotates integrally, and in particular, during the lowering control of the shielding material, the shielding material smoothly moves down unless the shielding material contacts an obstacle.

  On the other hand, if the shield contacts the obstacle during the lowering operation of the shield, as shown in FIG. 10B, the load applied to the lifting / lowering cord 3 disappears, and the slack occurs. Then, the slider 52 is pushed back by the urging force of the compression spring 57, and the stopper 52e on the lower surface of the slider 52 moves until it comes into contact with the side edge of the opening 56b. The rotation of 59 stops mechanically. When the rotation of the ratchet member 59 stops mechanically, the rotation of the drive shaft 2A also stops mechanically. However, the control device 10 controls the motor 9A to rotate the drive shaft 2A. Such an abnormal value can be detected.

  Therefore, as shown in FIG. 8 described above, the control device 10 suspends the raising operation or the lowering operation of the shielding member when detecting an abnormal value related to the motor drive, and after the suspension, rotates the shielding member by a predetermined amount in reverse. Control to stop by driving the motor. This prevents waste of power, heat generation or damage of the motor 9A, and keeps the creep load on the drive shaft 2A in a state where it disappears. And stable operation can be maintained.

  As described above, the control at the time of detecting the abnormal value related to the motor drive is performed by mechanically locking the rotation of the drive shaft 9A (or 9B or 9C) irrespective of the clutch type or the slider type. This is an effective control for the electric shielding device including the obstacle detection and stop device that operates as described above.

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

  ADVANTAGE OF THE INVENTION According to this invention, the adaptability to various installation places and the raising / lowering operable range of the shielding material according to the user's preference can be set arbitrarily, and the convenience is improved. Useful.

DESCRIPTION OF SYMBOLS 1 Head box 2A, 2B, 2C Drive shaft 3 Elevating cord 3U Elevating cord for upper screen 3L Elevating cord for lower screen 4 Intermediate rail 5 Support member 6 Shielding material (slat)
6U upper shielding material (upper screen)
6L Lower shielding material (lower screen)
7 Bottom rail 8A, 8B, 8C Encoder 9A, 9B, 9C Motor 10 Controller 11 DC power supply 12 Ladder code 15 Bracket 20A, 20B, 20C Drive shaft coupler 21 Wired switch 22 Wireless remote controller 23 Infrared remote controller 24 Personal computer (PC)
52 Slider 55 Tilt drum 56 Bottom plate 57 Compression spring 58 Pulley 59 Ratchet member 101 Microcomputer unit 102 Storage unit 103 Infrared signal receiving unit 104 Wireless signal transmitting / receiving unit 105 Wired signal transmitting / receiving unit 106 External device interface (IF) unit 107a, 107b Motor drive Units 108a, 108b Abnormality detection units 109a, 109b Pulse detection units

Claims (20)

An electric shielding device that enables each of a plurality of shielding members connected vertically to be vertically movable,
The multi-stage shielding material has an upper shielding material and a lower shielding material,
An electric shielding apparatus comprising: an upper limit setting unit that can individually and variably set an upper limit position of the upper shielding member and an upper limit position of the lower shielding member within a range of each elevating area. An electric shielding device that enables each of a plurality of shielding members connected vertically to be vertically movable,
The multi-stage shielding material has an upper shielding material and a lower shielding material,
An electric shielding apparatus comprising: lower limit setting means for individually and variably setting a lower limit position of the upper shielding member and a lower limit position of the lower shielding member within a range of each elevating area. An electric shielding device that enables each of a plurality of shielding members connected vertically to be vertically movable,
The multi-stage shielding material has an upper shielding material and a lower shielding material,
An upper / lower limit setting unit that can variably set the upper / lower limit position of the upper shielding material and the upper / lower limit position of the lower shielding material within a range of each ascending / descending area individually by a series of operations. Electric shielding device.   The upper limit setting unit according to claim 1, the lower limit setting unit according to claim 2, or the upper / lower limit setting unit according to claim 3, wherein each of the upper limit in the upper shielding material and the lower limit material in the lower shielding material. Regarding the setting of the position, or each lower limit position, or each upper and lower limit position, after receiving the first setting command, the three types included in the operation signal from the external device having three types of buttons of ascending, descending, and stopping 4. The electric shielding device according to claim 1, further comprising a control unit configured to receive three types of commands corresponding to the buttons and control the manual setting. 5.   The control means has upper limit detection means for detecting a physical upper limit position of each of the upper shielding material and the lower shielding material, and variably sets an upper limit position for each of the upper shielding material and the lower shielding material. 4. The method according to claim 1, wherein the physical upper limit position indicating the physical upper limit position is controlled such that the upper limit is set to a position lowered at a position desired by the operator by the manual setting. Item 5. The electric shielding device according to Item 4.   When the desired position of the operator is set within a predetermined range from the physical upper limit position by the manual setting, the control unit sets a position lowered from the physical upper limit position to a position within the predetermined range as an upper limit setting position. The electric shielding device according to claim 5, wherein the electric shielding device is controlled as follows.   The control means has upper limit detection means for detecting a physical upper limit position of each of the upper shielding material and the lower shielding material, and variably sets a lower limit position for each of the upper shielding material and the lower shielding material. 4. The method according to claim 2, wherein a lower limit is set from a physical upper limit position indicating the physical upper limit position to a position lowered at a position desired by the operator by the manual setting. Item 5. The electric shielding device according to Item 4.   The control means has a lower limit detection means for detecting a physical lower limit position of each of the upper shielding material and the lower shielding material, the desired position of the operator by the manual setting the physical lower limit position When set within a predetermined range from the physical lower limit position shown in the figure, control is performed such that a position raised from the physical lower limit position to a position within the predetermined range is set as a lower limit set position. Electric shielding device.   The upper limit setting unit according to claim 1, the lower limit setting unit according to claim 2, or the upper / lower limit setting unit according to claim 3, wherein each of the upper limit in the upper shielding material and the lower limit material in the lower shielding material. 4. The control device according to claim 1, further comprising a control unit configured to control the automatic setting after receiving the first setting command for setting the position, each lower limit position, or each upper and lower limit position. 5. The electric shielding device according to the item.   The control means has upper limit detection means for detecting a physical upper limit position of each of the upper shielding material and the lower shielding material, and variably sets an upper limit position for each of the upper shielding material and the lower shielding material. 10. The method according to claim 9, wherein the control is performed such that an upper limit is set to a position lowered at a predetermined position by the automatic setting from the physical upper limit position indicating the physical upper limit position. The electric shielding device according to the above.   The control means has upper limit detection means for detecting a physical upper limit position of each of the upper shielding material and the lower shielding material, and variably sets a lower limit position for each of the upper shielding material and the lower shielding material. 10. The method according to claim 9, wherein the control is performed such that the lower limit is set to a position lowered at a predetermined position by the automatic setting from the physical upper limit position indicating the physical upper limit position. The electric shielding device according to the above.   The control unit has a lower limit detection unit that detects a physical lower limit position of each of the upper shielding material and the lower shielding material, from a physical lower limit position indicating the physical lower limit position to a position within a predetermined range. The electric shielding device according to claim 9, wherein the raised position is controlled to be a lower limit setting position. Each of the upper shielding material and the lower shielding material is configured to rotate a drive shaft by driving a motor and move up and down,
The control means, as the upper limit detection means, detects at least one of an overcurrent, an abnormal waveform current, and an abnormal waveform voltage related to driving of the motor, and detects a rotation amount of the motor or the drive shaft. The detection of absence of an output from an encoder is configured to detect a physical upper limit position of each of the upper shielding material and the lower shielding material by any one or more of the above methods. The electric shielding device according to any one of 5, 7, 10, and 11. Each of the upper shielding material and the lower shielding material is configured to rotate a drive shaft by driving a motor and move up and down,
The control means, as the lower limit detection means, for each of the upper shielding material and the lower shielding material, an overcurrent related to driving the motor, an abnormal waveform current, and one or more abnormality detection of abnormal waveform voltage. Detecting the absence of output from an encoder that detects the rotation amount of the motor or the drive shaft, and detecting the physical lower limit position of each of the upper shielding material and the lower shielding material by one or more of the above. The electric shielding device according to claim 8, wherein the electric shielding device is configured as described above.   An obstacle detection device that detects an obstacle that hinders the lowering operation with respect to each of the upper shielding material and the lower shielding material, and that operates to mechanically lock the rotation of the drive shaft, The electric shield device according to claim 14.   The said control means has a means which controls each lower limit position of the said upper shielding material and the said lower shielding material so that a fine adjustment operation is possible within the range of a raising / lowering area, The characterized by the above-mentioned. Electric shielding device. An electric shielding device that electrically controls the lifting and lowering of the shielding material,
A motor capable of moving the shielding member up and down,
Control means for controlling the driving of the motor while monitoring an abnormal value related to the driving of the motor,
The control unit may include a unit that temporarily stops the raising operation or the lowering operation of the shielding material when the abnormal value is detected, and after stopping the driving, drives the motor so as to reversely rotate by a predetermined amount and then stops. Characterized electric shielding device. The shielding material includes a multi-stage slat,
A second motor for rotating the multi-stage slats,
The control means controls the driving of the second motor while monitoring an abnormal value related to the driving of the second motor, and temporarily stops the rotating operation of the multi-stage slat when the abnormal value is detected. 18. The electric shielding apparatus according to claim 17, further comprising: means for driving and stopping the second motor so as to reversely rotate by a predetermined amount after the temporary stop.   19. The electric shielding apparatus according to claim 17, wherein the abnormal value includes at least one of a predetermined overcurrent, an abnormal waveform current, and an abnormal waveform voltage.   20. An obstacle detection device according to any one of claims 17 to 19, further comprising an obstacle detection device that detects an obstacle that hinders the lowering operation of the shielding member and that operates to mechanically lock the rotation of the drive shaft. The electric shielding device according to item 1.