JP6172968B2 - Electric screen device - Google Patents

Description

  The present invention relates to an electric screen device, and more particularly to an electric screen device configured to wind a screen around a winding shaft that can be moved up and down.

  A general electric screen device is provided with a rotary drive body for winding up the screen inside a casing attached to a predetermined position (usually a ceiling or the like), and the rotary drive body is rotated to drive the screen. It was a configuration to take. Further, in this type of screen device, in order to flatten the screen surface in use, a bar functioning as a weight is provided along the lower end edge at the lower end edge (see Patent Document 1).

  However, since the apparatus having the above configuration supports the entire weight including the screen winding drum and the screen by only two bearings at both ends, the weight is increased by increasing the size of the screen and the length of the screen winding drum. If it increases, the amount of deflection of the screen winding drum increases, resulting in the problem that wrinkles occur on the screen surface. Therefore, for a relatively small (small area) screen, the overall weight is relatively light, so the above weight will not be a problem, but when making the screen large (large screen) It has become difficult to support the weight of the bearings by the bearings at both ends, which causes problems such as strength and installation conditions. In addition, even if the motor for driving is individually supported, the large screen itself is heavy, and the weight for flattening the surface must be large. There wasn't. Moreover, in order to make it large (large area), since the length in the horizontal direction is long, the rotational drive body must also be long, and the rotational drive body (bar-shaped member or cylindrical member) It was necessary to maintain the strength (particularly to eliminate the occurrence of bending). In other words, if the rotary drive cannot withstand the weight and bends, the bend causes wrinkles on the screen surface, and when used for projection, the projected image is distorted. Could result in

  On the other hand, the upper end of the screen is fixed, and a long pipe connected along the width direction is rotated in the lower part of the screen (including the vicinity of the center), and the pipe is raised while winding the screen. A screen device has also been developed (see Patent Document 2 for winding around the center of the screen). In this apparatus, since the upper end of the screen is supported by a support shelf (ceiling or the like), it is possible to support a necessary and sufficient portion. That is, it was possible to support a plurality of locations that can be dispersed and supported according to the weight of the screen.

JP 2003-228132 A Japanese Patent Laid-Open No. 10-3123

  Since the technique disclosed in Patent Document 2 shown above is configured to wind up the screen by rotating the pipe provided near the center of the screen as described above, the rotation of the pipe is assumed as the premise thereof. The force needed to be applied evenly throughout. The reason is that if the rotational speeds near the both ends of the long pipe are different, the wound screen becomes spiral and cannot be wound at a predetermined position. Therefore, in the above technique, a wire driven by a single winding device (motor) is connected to both ends of the pipe so that both ends of the pipe can be rotated simultaneously.

  However, according to the configuration of the above technique, the same rotational force can be simultaneously applied to the pipe by winding the wire by a single winding device. However, a roller for changing the extending direction of the wire ( In order to make the roller (pulley) inconspicuous from the outside, it is installed above a support shelf (generally a ceiling or the like).

  As a result, a drive device and a roller (pulley) are generally installed behind the ceiling, and the installation work is not easy. In addition, depending on the state of the ceiling, there are obstacles (for example, the presence of beams) in the direction in which the wire should be extended, and in order to avoid these obstacles, the extension direction of the wire is further increased. It was expected that a roller (pulley) to be changed had to be provided.

  Furthermore, since the wire is raised while winding the pipe, sufficient strength is required. For this reason, the diameter of the wire must be increased as necessary, and the large-diameter wire is wound. At the time of winding or rewinding, the position of the wire in the wire winding portion changes in the axial direction, and therefore, between the wire winding portion on the winch side and the wire winding portion on the screen winding side. The tension direction of the wire is not maintained vertical, and an angle is generated. For this reason, adjacent wires rub against each other in the wire winding part, or the wire and the roller (pulley) rub against each other to generate an annoying squeaking sound, and the wire winding (winding) in the wire winding part. There is a problem of causing a phenomenon such as a state in which the wire is wound around a finished wire.

  The present invention has been made in view of the above-described points, and the object of the present invention is to maintain a large screen, smoothly with a simple device, and in a state where the screen is almost even from the lower end. An electric screen device that can be wound is provided.

  Accordingly, the present invention provides a screen support portion for fixing the upper edge of the screen, a long winding body portion having a circular cross section that is fixed while the longitudinal direction is horizontal along the lower edge of the screen, and winds up the screen. A winding region having a predetermined length capable of winding a wire at both ends of the winding drum portion, and two wire winding portions formed integrally with the winding drum portion; and the wire Each of the winding parts is provided with two wires individually wound in a direction opposite to the direction in which the winding body winds up the screen, and is provided in the vicinity of the upper edge of the screen. Two winches for individually winding and unwinding the wire, and a control unit for controlling the winding operation of the two winches, and when the winch winds the wire, the winch is wound around the wire winding unit. Winding wire When the winch rewinds the wire, the wire winding part winds the wire, so that the winding body part rotates while moving up and down, enabling the screen to be wound and unwound. It is characterized by.

  According to the above configuration, when the screen is rewound, the wires wound on the two winches are rewound in the same state in the individually controlled winches so that both ends of the winding drum portion are simultaneously and Similarly, it can be lowered and lowered while keeping the longitudinal direction of the winding drum portion horizontal, whereby the screen can be gradually rewound. Since the winding drum rotates as the screen is rewound, the wire winding unit provided integrally with the winding drum rotates to wind the wire around the winding region. Can do. At this time, due to the dead weight of the winding drum (and the wound screen), a downward force is always acting on the winding drum, the wire is unwound from the winch, and the wire winding is lowered. As a result, the screen is rewound from the winding drum portion that descends at the same time, and the wire is wound around the wire winding portion by the rotation of the winding drum portion at that time.

  On the other hand, at the time of winding the screen, the wire wound around the wire winding part at both ends of the winding body part is wound around the wire winding part by simultaneously and similarly winding up the wire wound by the individually controlled winch. The wound wire is rewound, and accordingly, the winding drum portion rotates, and the screen can be wound around the winding drum portion by the rotational force.

  By the way, as described above, the upper end edge of the screen is fixed, and the winding drum part and the wire winding part move up and down while rotating integrally, and when moving up and down, the length from the upper edge of the screen to the winding drum part, Since the length from the winch to the wire winding portion changes in the same manner, the winding body portion and the wire winding portion function as an integral kind of moving pulley. In other words, when the screen is rewound, the wire that is rewound from the winch is wound around the wire winding portion, but the screen is rewound within a range corresponding to the winding length. In, the wire wound around the wire winding portion is rewound, but the screen is wound up in a range corresponding to the length. Therefore, the length of the wire that is unwound or wound by the winch is the sum of the amount of change in the length from the winch to the wire winding portion and the amount of change in the length of the screen being rewound, When the diameters of the winding drum and wire winding are the same, if the screen thickness (change in diameter of the winding drum) is ignored, it is equivalent to twice the moving distance of the winding drum and wire winding. The winch rewinds or winds up the length of the wire.

  When the winding of the screen is completed or when the rewinding is completed, the winding drum portion is supported by the screen, and the wire winding portions at both ends thereof are supported by the wire. In any state, a part of the screen is wound around the winding drum part, and a part of the wire is also wound around the wire winding part, so that the circular cross section of the winding drum part can be obtained. It will be supported tangentially upward. Further, since the upper end portion of the screen is fixed, the support state of the screen itself is stable.

  In the above invention, the two winches are provided with a winding drum having a winding area of a predetermined length, and the winding area of the winding drum and the winding area of the wire winding portion are opposed to each other in the vertical direction. The wire connected between the winding region of the winding drum and the winding region of the wire winding unit is installed so as to be wound up without being overlapped at a position opposed to the winding region and the winding region. Configure to be.

  According to the said structure, since the winding area | region formed in the winding drum of a winch and the winding area | region of a wire winding part are provided in the position which opposes, the wire connected between both is close to a perpendicular direction Can be placed in a state. Further, since the wires wound in both the winding region and the winding region are not overlapped at the mutually opposed positions, the portion where the wire is wound on one side and the wire is wound on the other side. Is the opposite side across the wire portion suspended between them, and the wire that is unwound from one side is on the other side of the wire that has been wound up (winding across the wound wire) State).

  In each of the above inventions, the wire winding part may be configured to have a smaller diameter than the outer diameter of the winding body part.

  In this case, out of the length of the wire that fluctuates due to winding or unwinding by the winch (the variation in the length from the winch to the wire winding portion), the proportion of the portion used for the rotation of the wire winding portion is reduced. can do. Therefore, the fluctuation amount of the length of the wire can be reduced, the total length of the wire can be shortened, and the amount of winding or unwinding by the winch can be reduced.

  Further, in each of the above inventions, each of the two winches includes a motor and a pulse encoder that detects a rotation angle of the motor, and the control unit acquires motor information acquisition means for acquiring a count value of the pulse encoder. And drive output value calculation means for calculating a motor output value so that the rotation angles of the motors of the two winches coincide with each other based on the output information of the pulse encoder.

  According to the said structure, it becomes possible to control similarly the state of the winch at the time of winding up or rewinding a wire independently in two places. In other words, each winch is provided with a motor, and by detecting the rotation angle of the motor with a pulse encoder, the output can be adjusted so that the rotation angles of the motors coincide with each other. Thus, it is possible to make the amount of winding or unwinding of the wire by both winches the same. In this way, by making the winding amount or unwinding amount of the wire by both winches the same state, it is possible to raise and lower both ends of the winding drum portion at the same time and maintain the longitudinal direction of the winding drum portion horizontal. In this state, the screen can be lifted and lowered while making the winding state of the screen uniform.

  In the invention having the above-described configuration, a limit switch is provided near the upper limit of the range in which the winding drum part can be raised and lowered, and the control unit outputs a reset signal that resets the count value of the pulse encoder by a signal of the limit switch It can be set as the structure provided with a means.

  In the case of the above configuration, when the winding drum portion is lowered and the screen is rewound, and then the winding drum portion is raised and wound up, the limit switch operates near the upper limit of the winding drum portion, and the winch motor The operation can be stopped. At this time, the motors of both winches are operated until the limit switch signal is received even when the rotation angles of the two are different, so that both ends of the winding drum section reach the upper limit value (limit switch). Can be raised. Furthermore, in this state, the reference value (0 value) of the winding state of the wire by both winches can be corrected by resetting the count value of the pulse encoder. The correction of the reference value is also for adjusting the plastic deformation of the two wires. That is, even if the wire provided individually is assumed to be physically stretched (plastically deformed) by the load, and the degree of plastic deformation (elongation rate) differs between the two wires, the winding drum portion By using this position as a reference for the operating position of the limit switch, it is possible to suppress the unwinding or unwinding state of both of them.

  Furthermore, in the above invention, a motor controller for managing the output information of the pulse encoder and the motor output information is provided in the vicinity of the motor, and the motor controller and the control unit transmit and receive signals to and from each other wirelessly. You may comprise so that it may become.

  According to the above configuration, it is possible to remotely control the deployment and storage of the screen, and since no connection is required between the winches provided individually, wiring is performed on the back side of the ceiling where the screen is installed. It is no longer necessary.

  According to the present invention, since the upper end edge of the screen itself is fixed, the weight of the large screen is sufficiently supported. Since the winding drum provided along the lower edge of the screen rotates at the same time in both ends at the same time, the entire body rotates at the same timing in the longitudinal direction, and the entire screen is in a substantially uniform state. Can be wound up. Furthermore, since the wire fixed to the winch is wound around the wire winding part provided to rotate the winding body part, the weight of the winding body part is distributed and supported by the screen and the wire. As a result, when the screen is unfolded (rewinded), the weight of the winding drum portion is not concentrated and supported only on the screen, and the wear of the screen can be reduced. Furthermore, as described above, since the winding drum portion is dispersedly supported by the screen and the wire, the winding drum portion can be designed to be relatively heavy, and at the lower end edge when the screen is unfolded (when unwinding). The effect as a weight can be sufficiently obtained. In particular, in the case of a large screen, it is necessary to increase the downward pulling force by the lower end edge in order to remove surface wrinkles, so that such an effect can be obtained. When the screen is stored (winding), the weight of the screen wound around the winding drum is added to increase the overall weight of the winding drum. Since a part (a part near the upper edge) and the wire can be dispersedly supported, the load acting on a part of the screen can be reduced. As a result, it is possible to protect the upper edge of the screen and the vicinity thereof that are easily damaged due to concentration of load.

  Furthermore, since the winding and unwinding of the screen around the stable winding body as described above can be performed only by the operation of the winch installed in the vicinity of the upper edge of the screen, an electric screen device having a relatively simple configuration can be obtained. Can be provided. That is, the installation work is facilitated without suspending the wire on the information (generally the ceiling) where the upper edge of the screen is fixed. Moreover, since it is not necessary to change the extending direction of a wire, the pulley for that can be made unnecessary.

It is explanatory drawing which shows embodiment of this invention. It is explanatory drawing which shows the relationship between a wire winding part and a winding drum, and a wire. It is explanatory drawing which shows the raising / lowering state of a screen. It is explanatory drawing which shows the state of control by a control part. It is the schematic which shows the structure of a control part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an outline of an embodiment of the present invention. As shown in this figure, the upper end edge 11 of the screen 1 is supported at a plurality of locations by the suspension support member 2. The suspension support member 2 is constituted by a long anchor bolt 21 and is generally fixed by burying the upper end in the ceiling. Further, the upper end edge 11 of the screen 1 is sewn so as to cover a small-diameter bar-like member, and the suspension support member 2 has an annular member 22 connecting the bar-like member as a lower end of the anchor bolt 21. It is the structure provided integrally.

  A lower end edge 12 of the screen 1 is fixed to the winding drum section 3. The winding drum part 3 is provided in a long cylindrical shape made of carbon or aluminum, and the terminal part of the lower end edge of the screen 1 is fixed along the generatrix of the cylindrical surface. A state where a part of the lower end edge 12 of the screen 1 is wound around the winding body 3 is a limit state of rewinding. Accordingly, not all of the screen 1 wound around the winding drum portion 3 is rewound, and both are connected (fixed) in a state where the outer periphery of the winding drum portion 3 is wound at least once. Thus, by setting the state where a part of the screen 1 is wound to the limit state, the weight of the winding drum portion 3 is supported by the frictional resistance between the surfaces of the screen 1 without depending on the fixing force (adhesive force, etc.). Moreover, it is for suppressing the bending of the winding drum part 3.

  By the way, since the surface of the general screen 1 is rectangular, the lower end edge 12 is also in a horizontal state by installing the upper end edge 11 in a horizontal state. Therefore, by aligning the lower end edge of the screen 1 installed in this way (with the upper end edge 11 horizontally) and the bus bar of the winding drum portion 3, the winding drum portion 3 is set in a screen with the axial direction in a horizontal state. 1 is attached.

  Wire winding portions 4 and 5 are provided at both ends of the winding drum portion 3, and on the both sides of the screen 1 near the upper edge of the screen 1 so as to face the wire winding portions 4 and 5. Each one winch 6, 7 is provided individually. Wires 8 and 9 are connected between the winches 6 and 7 and the wire winding portions 4 and 5. The winches 5 and 6 are provided with winding drums 61 and 71 for winding the wires 8 and 9, and motors 62 and 72 for rotating the winding drums 61 and 71, respectively. The winding drums 61 and 71 are provided with flanges on both sides, and are formed with winding regions 60 and 70 around which the wires 8 and 9 can be wound in a predetermined range. On the other hand, the wire winding portions 4, 5 are provided so as to protrude in the axial direction from both ends of the winding drum portion 3, and are formed in a cylindrical shape like the winding drum portion 3. And the wire winding parts 4 and 5 have a flange in an outer side edge part, and almost the whole functions as the winding area | regions 40 and 50. As shown in FIG.

  Here, as shown in FIG. 2, the wire winding portions 4 and 5 and the winding drums 61 and 71 of the winches 6 and 7 are disposed so as to face each other in the vertical direction. The winding regions 40 and 50 and the winding regions 60 and 70 have the same positional relationship while being divided into upper and lower portions, and are provided facing each other. The wires 8 and 9 connected between them are in a state where at least both end portions 81, 82, 91 and 92 are wound around the wire winding portions 4 and 5 and the winding drums 6 and 7, respectively. Yes. Moreover, the winding portions 81, 82, 91, 92 of the wires 8, 9 are wound on the opposite side in the axial direction (horizontal direction) across the portions 80, 90 suspended between them, and are opposed to each other. The winding portions (81 and 82, 91 and 92) in FIG.

  By winding the wires 8 and 9 around the wire winding portions 4 and 5 and the winding drums 6 and 7 in the state as described above, the lower ends of the wires 8 and 9 rewound from the winding drums 6 and 7 are the wire winding portions. 4 and 5, even if the wires 8 and 9 move in the axial direction of the winding drums 6 and 7, the wire winding portions 4 and 5 are wound at the moved positions. The wire portions 80 and 90 suspended on the wire can move while maintaining a substantially vertical state. Further, since the wires 8 and 9 wound in the wire winding portions 4 and 5 at this time do not have other wire portions that have already been wound, they do not cause the phenomenon of the wires 8 and 9 getting on. Become.

  Similarly, when the wires 8 and 9 are wound up by the winches 6 and 7, the wires 8 and 9 wound up by the winding drums 61 and 71 are wound at the positions where they are moved when they are unwound from the wire winding portions 4 and 5. Therefore, even in the winding drums 6 and 7, it is possible to prevent the wires 8 and 9 from climbing up.

  By the way, although details will be described later, since the upper edge 11 of the screen 1 is fixed (FIG. 1), when the winding body 3 and the winding parts 4 and 5 integral therewith are moved up and down, the wires 8, The lengths of the nine suspended portions 80 and 90 and the length of the unrolled (unfolded) portion of the screen 1 change simultaneously. That is, the winding drum section 3 and the wire winding sections 4 and 5 in the entire apparatus function as a kind of moving pulley. Therefore, when the diameters of the winding drum portion 3 and the wire winding portions 4 and 5 are the same, if the wall thickness of the screen 1 (change in the diameter of the winding drum portion 3) is ignored, the suspended portion 80 of the wires 8 and 9 is used. , 90 is twice as long as the height change of the winding drum section 3 and the wire winding sections 4 and 5 (the length in which the screen 1 is developed).

  Therefore, the positions of the wires 8 and 9 from the winding drums 61 and 71 toward the wire winding portions 4 and 5 (this is referred to as the output position) and the output positions of the wires 8 and 9 in the wire winding portions 4 and 5 are set up and down ( In order to coincide with the (vertical) direction, the diameters of the winding drums 61 and 71 are set to be twice the diameter of the wire winding portions 4 and 5. That is, since the amount of change of the wires 81 and 91 wound around the winding drums 61 and 71 is twice the amount of change of the wires 82 and 92 wound around the wire winding portions 4 and 5, the amount of change coincides with both. It can be made. And by making both the protruding positions coincide in this way, the suspended portions 80 and 90 of the wires 8 and 9 can always be maintained in the same direction (for example, the vertical direction).

  However, in the present embodiment, the diameters of the winding drum section 3, the wire winding sections 4 and 5, and the winding drums 6 and 7 are the same. This is to make the winding pitch by the winding drum sections 3 and 4 twice the winding pitch by the winding drums 6 and 7. In other words, the wires 82 and 92 wound around the wire winding portions 4 and 5 are roughened with respect to each other between adjacent wires. This is because the screen 1 is shaken not a little by vibrations when moving up and down or by wind from the indoor air conditioner or the like.

Accordingly, when the wire winding portions 4 and 5 and the winding drums 61 and 71 are intended to precisely match the protruding positions of the wires 8 and 9, the winding wires 81, 82, 91, and 92 are in a dense state. In the case where the adjustment is made with the purpose, the ratio of the respective diameters is set to be different .

  First, the state of unwinding (developing) the screen 1 will be described. When the winding drums 61 and 71 of the winches 6 and 7 are rotated in the direction (reverse rotation direction) opposite to the winding direction (forward rotation direction), the wires 8 and 9 wound up by the winding drums 61 and 71 are rewound. Can do. Even in the state where the wires 8 and 9 are rewound, the pulling force F1 due to the wires 8 and 9 and the pulling force F2 due to the main body portion of the screen 1 act upward, and the downward force due to the weight of the winding drum portion 3 is applied. There is no change in the structure that supports W. Therefore, the wire portions 80 and 90 suspended between the winding drums 61 and 71 and the wire winding portions 4 and 5 are lengthened by rewinding by the operation of the winches 6 and 7 as described above, whereby the winding is performed. The lowering of the trunk portion 3 due to its own weight W is permitted.

  By the way, the wire winding portions 4 and 5 and the winding drum portion 3 integrated therewith can be lowered within a range in which the wire portions 80 and 90 are lengthened. Is wound, the winding body portion 3 must be rotated in order to descend, and the wire winding portions 4 and 5 are also rotated by this rotation. And since these wire winding parts 4 and 5 will wind the wire parts 80 and 90 suspended according to the rotation, they are substantially wire winding parts 4 and 5 (and winding drum). The range in which the portion 3) can be lowered is the remaining length obtained by subtracting the amount of change that is shortened by being wound by the wire winding portions 4 and 5 from the amount of change in which the suspended wire portions 80 and 90 are lengthened. . Therefore, the length of the wires 8 and 9 wound by the wire winding portions 4 and 5 is shorter than the length of the wires 8 and 9 rewound by the winding drums 61 and 71. And the wire winding parts 4 and 5 and the winding drum part 3 are lowered by the length corresponding to the difference. The state of such movement includes the screen 1 with the upper end fixed, the winding drum portion 3 around which the lower end is wound, the wire winding portions 4 and 5 integral therewith, and the wires 8 and 9 that change the length. Thus, the winding drum portion 3 and the wire winding portions 4 and 5 are configured to function as a kind of moving pulley.

  Then, by continuing the rewinding of the wires 8 and 9 by the winding drums 6 and 7 as described above, the winding drum portion 3 rotates while descending, and the screen 1 is rewound. 5 shows that the screen 1 can be unfolded by continuously lowering the wire 8 and 9 together with the winding drum portion 3 and lowering it to a desired position while winding the wires 8 and 9 gradually by the rotation of the winding drum portion 3.

  Next, the state of winding (storage) of the screen 1 will be described. In the state in which the screen 1 is rewound (deployed), the winding drum portion 3 is located near the lower edge of the screen 1, and the wires 8, 9 are appropriately wound around the wire winding portions 4, 5. It is in the state. Therefore, by rotating the winding drums 61 and 71 in the normal rotation direction by the winches 6 and 7, the wires 8 and 9 are pulled upward to act to rotate the wire winding portions 4 and 5. As the wire winding portions 4 and 5 rotate, the winding drum portion 3 also rotates in the same manner. However, a part of the screen 1 (near the lower end) is wound around the winding drum portion 3. In this case, the screen 1 cannot be rotated at a fixed position, and the screen 1 is lifted while rotating so as to wind up the screen 1. The wire winding portions 4 and 5 are also lifted by the rise of the winding drum portion 3, but since the winding of the wires 8 and 9 by the winches 6 and 7 is continuous, the surplus is caused by the rise of the wire winding portions 4 and 5. The power wires 8 and 9 are wound up by the winches 6 and 7. Accordingly, the winding body 3 and the wire winding portions 4 and 5 function as a kind of moving pulley, and the lengths of the wires 8 and 9 unwound from the wire winding portions 4 and 5 are determined by the winches 6 and 7. It becomes a state shorter than the length of the wires 8 and 9 wound up. A portion corresponding to the difference corresponds to a range in which the winding drum portion 3 and the wire winding portions 4 and 5 can be raised.

  Note that when the screen 1 is wound (stored), a downward force W acts on the screen 1 from the position wound on the winding drum portion 3 due to the weight of the winding drum portion 3. Therefore, the surface of the screen 1 is wound while maintaining the stretched state.

  As described above, the electric screen device of the present embodiment enables the screen 1 to be wound (stored) and rewound (deployed) only by operating the two winches 6 and 7. By the way, in order to enable the winding drum section 3 to wind or unwind the screen 1 almost uniformly as a whole, the winches 6 and 7 individually disposed at different positions are simultaneously wound and unwound. Is required to do.

  Therefore, in the present embodiment, as shown in FIG. 4, motors (DC brushless motors) 62 and 72 are provided to drive the winding drums 61 and 71 of both winches 6 and 7. Pulse encoders 63 and 73 are provided. The pulse encoders 63 and 73 can detect the rotation angle of the shafts of the motors 62 and 72 as a pulse signal, and can calculate a substantial rotation angle of the motor from the detected information. . A control unit 100 is provided for calculating the rotation angle. The control unit 100 calculates control data necessary for controlling the rotation angles of the motors 62 and 72. In order to make the rotation angles of the two motors 62 and 72 coincide with each other, Control data to be supplied to the motors 62 and 72 is calculated while comparing the rotation angles. A controller 200 is connected between the motors 62 and 72 and the encoders 63 and 73 and the control unit 100, and signals output from the encoders 63 and 73 are transmitted to the control unit 100. Control data corresponding to the signal output from 100 is output to the motors 62 and 72.

  That is, as shown in FIG. 5, the control unit 100 obtains the motor information acquisition unit 101 that acquires the count values of the pulse encoders 63 and 73, and the rotation angles of both the motors 62 and 72 based on the count values. And a calculation unit 102 for calculation. The calculation unit 102 is configured to match the rotation angles of the rotation angle calculation unit 121 that calculates the rotation angles of the motors 62 and 72, the comparison unit 122 that compares the calculated rotation angles of the motors 62 and 72, and the rotation angle. It functions as the necessary control data calculation unit 123, and various data are stored in the storage unit 103 and processed while reading data in the storage unit 103. Information of control data for the motors 62 and 72 to be finally controlled is output from the output unit 104. This output signal is output to the controller 200, and the controller 200 controls the actual motor rotation angle.

  The motor information output means 101 of the control unit 100 includes the reception antenna 105, the output unit 104 includes the transmission antenna 106, and the controller 200 includes an antenna that can transmit and receive the transmission antenna 106. Signals can be transmitted and received wirelessly.

  Since the embodiment of the present invention is as described above, the winding drum portion 3 is controlled by controlling the state of rotation of the wire winding portions 4 and 5 supported by the wires 8 and 9 at both ends of the winding drum portion 3. Can be moved up and down while rotating as a whole. As a device for that purpose, it is only necessary to operate a winch capable of individually winding and rewinding the wires 8 and 9 wound around the wire winding portions 4 and 5 in a synchronous manner. A large-sized electric screen device can be configured by a simple method.

  In addition, embodiment shown above shows an example of this invention and is not intending that this invention is limited to the said embodiment. That is, it is possible to modify the above embodiment. For example, as shown in FIG. 4, a configuration in which a limit switch 300 is provided in the vicinity of the upper limit of a range in which the winding drum portion 3 can be moved up and down, and the winding drum portion 3 is raised to a position where the limit switch 300 is operated. At this time, the winding of the wires 8 and 9 by the winches 6 and 7 can be stopped. In the case of such a configuration, even when the winding state of the wires 8 and 9 by the winches 6 and 7 is different, the positions of both ends when the winding drum portion 3 stops at the upper limit position are always constant. Can do. Further, when the limit switch 300 is operated, the count values of the pulse encoders 63 and 73 may be reset with the signal of the limit switch 300 as a trigger. A reset signal output means for resetting the count values of the pulse encoders 63 and 73 can be provided in the control unit 100.

  Moreover, in each figure for demonstrating the said embodiment, although the outer diameter of the wire winding parts 4 and 5 is illustrated as substantially the same diameter as the winding drum part 3 for convenience, this wire winding part 4 is shown. , 5 can be formed smaller than the outer diameter of the winding drum section 3. In this case, the ratio of the portion used for the rotation of the wire winding portions 4 and 5 is reduced out of the variation in the length of the wires 8 and 9 that varies due to the winding or unwinding by the winches 6 and 7. be able to.

  Furthermore, as described above, the outer diameters of the winding drums 61 and 71 of the winches 6 and 7 may be larger (for example, twice) than the outer diameters of the wire winding portions 4 and 5. In this case, by adjusting the ratio of the diameters, the amount of movement in the axial direction when wound on one side and simultaneously rewound on the other can be made the same.

DESCRIPTION OF SYMBOLS 1 Screen 2 Suspension support member 3 Winding drum part 4, 5 Winding part 6, 7 Winch 8, 9 Wire 11 Screen upper edge 12 Screen lower edge 21 Anchor bolt 22 Ring member 40, 50 Winding area 60, 70 Winding areas 61, 71 Winding drums 62, 72 Motors 63, 73 Pulse encoders 80, 90 Wire suspension parts 81, 82, 91, 92 Wire winding parts 100 Control unit 101 Motor information acquisition means 102 Calculation unit 103 Storage unit 104 Output Units 105 and 106 Antenna 121 Rotation angle calculation unit 122 Comparison unit 123 Control data calculation unit 200 Controller 300 Limit switch F1, F2 Tensile force W Weight

Claims (4)

A screen support portion for fixing the upper edge of the screen, a long winding body portion having a circular cross section that is fixed along the lower edge of the screen with the longitudinal direction being horizontal, and winds up the screen; and A winding region of a predetermined length where a wire can be wound at both ends is formed, and two wire winding portions formed integrally with the winding body portion, and each of the wire winding portions Two windings individually wound in a direction opposite to the direction in which the winding body winds up the screen, and provided near the upper edge of the screen, and the two wires are individually wound up and and two winches for rewinding, provided in each of the two winches for winding the wire, the predetermined drum hoist has a length of hoisting area, hoist of the two of the winch And a control unit for controlling,
A winding region of the wire winding part and a winding region of the winding drum are provided facing each other in the vertical direction,
Each of the two wires is wound around the winding drum and the wire winding portion, and the portion wound around the winding drum and the wire winding portion is suspended between both. Are placed on the opposite sides of the wire, and wound so as not to overlap at a position opposite to the winding region and the winding region,
When the winch winds up the wire, the wire wound around the wire winding portion is unwound, and when the winch rewinds the wire, the wire winding portion winds the wire, so that the winding is performed. An electric screen device characterized in that a body portion rotates while moving up and down to enable winding and rewinding of the screen. The electric screen device according to claim 1 , wherein a diameter of the winding drum is twice or the same as a diameter of the wire winding portion . Each of the two winches includes a motor and a pulse encoder that detects the rotation angle of the motor,
The control unit sets the motor output value to match the rotation angle of the motors of the two winches based on the output information of the pulse encoder and the motor information acquisition means for acquiring the count value of the pulse encoder. The motorized screen device according to claim 1, further comprising a drive output value calculating means for calculating.   Further, a limit switch is provided near an upper limit of a range in which the winding drum part can be moved up and down, and the control unit includes a reset signal output unit that resets a count value of the pulse encoder by a signal of the limit switch. 3. The electric screen device according to 3.

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