JPH07981B2 - Elevator unit for electric blinds - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electric blind installed on a window surface of a structure such as a house or a building, and more particularly, to an electric blind incorporating a lifting mechanism for a wind and an angle adjusting mechanism. Related to the lifting unit.

[Prior Art and Problems to be Solved by the Invention] In a conventional electric blind, a sequential control circuit including switches and relays is adopted. For this reason,
It is not possible to confirm the current raising / lowering position of the blind and the opening / closing angle of the blade (hereinafter referred to as slat).
Specifically, in the conventional electric blind, in order to return the blind to the original position after raising the blind once, the operator must confirm the original position and the frind has dropped to the original position. It is necessary to visually check and operate the stop switch. Also, when adjusting the slat angle, after the blinds have been raised and lowered, they are all closed, and after the blinds have been stopped at the desired position, the slat angle must be adjusted again to the desired angle. I won't.

In addition, a cord called a ladder cord for opening and closing the slats is provided at a distance of 2 corresponding to the width of the slats.
It is provided as a set. The amount of movement of this ladder cord corresponds to the diameter of the ladder drum, but since the ladder drum and the winding drum are conventionally integrally formed, the ladder cord is moved up and down according to the slat width of each type. It is necessary to prepare a device, the number of parts is increased, the assembly process and management thereof are complicated, and the cost is increased.

Therefore, the main object of the present invention is to recognize the raising / lowering position of the blind and the opening / closing angle of the slat, simplify the assembling work, reduce the number of each component, and reduce the cost. The purpose of the present invention is to provide a lifting unit for an electric blind that can be used.

[Means for Solving the Problem] An elevator unit for an electric blind according to the present invention is rotatable in a drum case for winding or unwinding a drum case and a first belt-shaped member used for raising and lowering a blade. A first drum that is held and has a rotary shaft inserted from the outside into its center, a rotary member that is rotatably held in the drum case and that rotates with the rotary shaft that is inserted from the outside, and an angle adjustment of the blades. A second drum, which is disposed in the drum case for winding or unwinding the second belt-shaped member used for the second drum, and which is detachably mounted on the rotating member, and which is disposed in the drum case, and in which the blade is moved up and down. First detection means for detecting the rotation amount of the first drum to detect the
It is arranged in the drum case, and is provided with a second detection means for detecting the rotation amount of the second drum for detecting the angle of the blade.

[Operation] Since the second drum for adjusting the angle of the blade according to the present invention is detachably attached to the rotating member that rotates together with the rotating shaft inserted from the outside, by combining the components, An elevating device corresponding to the width of the slat can be easily supplied, and the rotation amount of the first and second drums used for elevating and lowering is detected by the first and second detecting means. It is possible to detect the angle and the vertical position.

[Embodiment of the Invention] FIG. 4 is a diagram showing an outline of the overall configuration of an electric blind to which an embodiment of the present invention is applied. First, the schematic configuration of the electric blind will be described with reference to FIG.
The power cord 1 and the controller 2 are connected to the control unit 3. The controller 2 includes a raising switch 21 for instructing the raising of the blind, a stop switch 22 for instructing a stop, a lowering switch 23 for instructing the lowering,
Open switch 24 to command to open slats 13
And a closing switch 25 for instructing to close the slat 13. The control unit 3 includes a microcomputer, a power supply unit, and the like, and is connected to a geared motor 4 including an electric motor and a reduction gear.

The rotation shaft of the geared motor 4 is connected to the lifting shaft 12 via the coupling 5. As will be described later in detail with reference to FIGS. 1 to 3, the elevating shaft 12 is connected with elevating units 6, 7 and 8. The sensors, the obstacle switch 36, and the upper limit switch 60 built in these lifting units 6 and 8 are controlled by the wiring member 9 to the control unit 3.
It is connected to the. The wiring member 9 includes wiring to the geared motor 4 and wiring to the controller 2. The lifting units 6 and 8 include a winding drum 37 and a ladder drum 39.
And the lifting unit 7 includes only the ladder drum 39. One end of a lifting tape (which may be a string-shaped one) 10 is fixed to the winding drum 37.

The other end of the lifting tape 10 penetrates a plurality of slats 13 and is fixed to a bottom rail 14. Then, the winding drum 37 winds or unwinds the lifting tape 10 in accordance with the rotation of the lifting shaft 12, and raises and lowers the slats 13 and the bottom rail 14. Further, one end of the ladder cord 11 is fixed to the ladder drum 39, and the ladder cord 11
The other end of is fixed to the bottom rail 14. The ladder drum 39 rotates with the rotation of the elevating shaft 12,
Controls the opening degree of slats. In addition, the bottom rail 14
Acts as a weight when descending the blinds and as a weight that prevents the blinds from swaying due to wind or the like after the descent.

The control unit 3, the geared motor 4, and the lifting units 6, 7 and 8 are covered by a head box 15 forming an outer box. At the bottom of this head box 15, a lifting unit
The lever 16 of the upper limit switch 60 provided at 6, 8 is protruding. When the blind is wound up, the upper limit switch 60 is pressed by the slats 13 and operates to detect the upper limit position.

1 to 3 are views showing the configuration of the lifting unit 6 shown in FIG. 4, in particular, FIG. 1 is a sectional view of the lifting unit, FIG. 2 is a plan view thereof, and FIG. The drawing is a plan view showing a part of the internal configuration. Next, FIGS. 1 to 3
The configuration of an embodiment of the present invention will be described in detail with reference to the drawings.

A take-up drum 37 is arranged substantially at the center of a drum case 50 that constitutes the lifting unit 6. The winding drum 37 is formed integrally with a drum shaft 40 that is a rotating shaft of the winding drum. The drum shaft 40 extends to one end of the drum case 50, and a hole 374 for inserting the elevating shaft 12 is provided in the center thereof. The ladder drum 39 is fitted on the drum shaft 40 via the metal bush 56 and the clutch spring 57 in a state having a frictional force. Ladder drum
A guide 391 provided with, for example, a slit 392 for detecting an angle is fixed to the 39 at a substantially semicircular portion. The guide 391 can rotate integrally with the ladder drum 39. Further, a cross-shaped groove 373 is formed on the outer surface of the drum shaft 40, and the guide holder 55 is fitted in the groove 373.
Further, a guide 371 having a slit 372 formed on the entire circumference is fixed to the guide holder 55. guide
371 can rotate integrally with the winding drum 37.

The photo interrupters 38 and 41 each include a light emitting portion and a light receiving portion, and are provided on the sensor substrate 58. The sensor substrate 58 is placed on a support base 53 provided on the bottom of the drum case 50, and the claws formed on the drum case 50.
Fixed by 54. The assembly parts of the take-up drum 37 on which the ladder drum 39, guide 391, guide holder 55, guide 371, etc. are mounted are inserted into the space between the light-receiving and light-receiving parts of the photointerrupters 38 and 41 corresponding to the guides 371 and 391. As described above, the bearing 59 of the drum case 50 is fitted from above. Further, in the drum case 50, a through hole 51 through which the lifting tape 10 passes is provided in a portion facing the winding drum 37, and a through hole 51 through which the ladder cord 11 passes is provided in a portion facing the ladder drum 39. Hole 52
Is provided. In addition, a stopper 62 for limiting the rotation of the ladder drum to approximately half the circumference is provided in the portion of the drum case 50 close to the ladder drum 39. As described above, the lifting unit of this embodiment has the winding drum 37.
Since the necessary parts such as the ladder drum 39 are mounted on the drum shaft 40 of the drum case 50 as an integrated component that can be handled integrally, by changing the combination, a plurality of types of blinds with different slat widths can be installed. Can be applied to both. Further, parts other than the ladder drum 39 can be used in common, and it is not necessary to prepare different lifting devices for different types of blinds as in the conventional case, so the number of parts can be reduced.

The upper limit switch 60, as shown in FIG.
It is provided on the central axis of 50. The lever 16, which is the operating end of the upper limit switch 60, has its tip protruding through the drum case 50 and the other end receiving a compressive force from a spring 61 and receiving the drum case.
Held on the bottom of the 50's. The obstacle switch 36 (not shown in FIG. 1) is provided between the winding drum 37 and the upper limit switch 60. The obstacle sensing lever 71 has a fulcrum 72 on the center axis of the drum case 50, one end is the operating end of the obstacle switch 36, and the other end is provided with a roller 75 that rotates in contact with the lifting tape 10. ing. The roller 75 is located below the winding drum 37. When the blind is normally wound up or rewound, the lifting tape 10 has a predetermined tension, so the roller 75 is pressed by the lifting tape 10 in the A direction.
Although the obstacle switch 36 is in the ON state, when the lifting tape 10 is loosened due to an abnormality in the blind, the roller 75 turns in the B direction by the action of the spring 73, and as a result, the obstacle switch 36 is turned on. It is turned off.

In the lifting units 6 and 8, the respective components are arranged symmetrically with respect to the winding drum 37. That is, the guide 371, the guide 391, the ladder drum 39, the winding drum 37, the obstacle switch 36, and the upper limit switch 60 are arranged in this order from the left end to the right end of the drum case 50. In this case,
Since the obstacle switch 36 must be arranged as shown in FIG. 3A, the drum case 50 is provided with a mounting pin so that the obstacle switch 36 can be attached at a position symmetrical with respect to the drum shaft 40. There is. Here, in the lifting unit 8, the obstacle switch 36 is attached as shown in FIG. 3A.
Lifting tape 10 with which roller 75 in FIG. 3 abuts
This is for the roller 75a to contact the surface on the same side as the surface.

FIG. 5 is a schematic block diagram of an embodiment of the present invention. Next, with reference to FIG. 5, an electrical configuration of an embodiment of the present invention will be described. AC power is input to the power transformer 31 via the power cord 1. Power transformer
Reference numeral 31 lowers the input AC power source and applies a low voltage to the stabilized power source unit 32 to generate a power source required for the control unit 3 and the geared motor 4. Microprocessor (hereinafter,
The motor drive circuit 33 is connected to the (referred to as MPU) 34,
The motor drive circuit 33 controls the geared motor 4 in the forward rotation, the reverse rotation, or the brake mode according to a command from the MPU 34.

Here, the brake mode is to short-circuit the input terminals of the geared motor 4 via the motor drive circuit 33. By short-circuiting the input terminals of the geared motor 4 in this way, the geared motor 4 is braked. Can be applied. That is, for example, the inertia caused by the descent of the blind or the case where the blind is strongly pulled in the direction of artificial descent mechanically causes the geared motor 4 to mechanically move.
When a rotational force is applied to the geared motor 4, the geared motor 4 generates a counter electromotive force which is the principle of the DC generator. Therefore, by short-circuiting between the input terminals, a current for causing this rotation to be blocked, that is, a reverse rotation, flows, and the geared motor 4 is stopped. A voltage detection circuit 35 is connected to the MPU 34. This voltage detection circuit 35 is a power supply Vcc supplied to the control unit 3.
It detects the voltage of. That is, the voltage detection circuit
Reference numeral 35 monitors the voltage supplied from the power cord 1 via the transformer 31 on the low voltage side.

The obstacle switch 36 is incorporated in the lifting units 6 and 8 as described above. When the operation of descending is stopped by hitting an obstacle or the like while the blind is descending, if the geared motor 4 continues to rotate in the descending direction, the lifting tape 10 becomes loose, and if this continues, the take-up drum 37 Even if the lifting tape 10 deviates from the above and the blind is then tried to be raised, the lifting tape 10 cannot be wound up, resulting in a serious failure.

In order to prevent this, the looseness of the lifting tape 10 is detected by the obstacle switch 36, the detection output is input to the MPU 34, and the geared motor 4 is stopped via the motor drive circuit 33. That is, the motor drive circuit
Set 33 to brake mode. Further, the MPU 34 reverses the geared motor 4 for an arbitrary time and winds up the blind to loosen the lifting tape 10, and then stops the geared motor 4.

The winding drum 37 winds or unwinds the lifting tape 10 in accordance with the rotation of the geared motor 4, and raises and lowers the blind. The fore interrupter 38 is provided corresponding to the guide 371 fixed to the drum shaft 40 of the winding drum 37. This photo interrupter 38 is a guide
The lift shaft 1 that detects the intermittent slit of 371 optically
The rotation of 2 is converted into an electric signal and input to the MPU34. That is, the MPU 34 can know the amount of lifting or lowering of the lifting tape 10 by the rotation of the winding drum 37 by an electric signal. As described above, one end of the ladder cord 11 is fixed to the ladder drum 39.By rotating the ladder drum 39, the angle of the slats 13 is changed, the incident amount of outside light is changed, and the room is appropriately brightened. Or block outside light.

The ladder drum 39 and the clutch spring 57 rotate integrally (synchronously), but when the ladder drum 39 rotates about half a rotation, the rotation is stopped by the stopper 62 provided on the drum case 50 and slips on the drum shaft 40. Spin idle. When the lifting shaft 12 is reversed, the ladder drum 39
Although it is also reversed, it hits the stopper 62 on the opposite side of the drum case 50 and spins in the same manner as described above. The slat 13 rotates in the clockwise direction and the angle of the slat 13 changes as the ladder drum 39 makes a half rotation. That is, the slat 13 changes from a state in which it is slanted and closed on the indoor side to a horizontal state and is opened, and a state in which it is slanted and closed to the outdoor side. When the elevating shaft 12 rotates in the direction opposite to that described above, the angle of the slats 13 changes counterclockwise. That is, the state in which the outdoor side is tilted and closed is changed to the horizontal state and the state is opened, and the indoor side is tilted and closed.

A guide 391 having a slit 392 for detecting the rotation of the ladder drum 39 is fixed to the circumferential portion of the ladder drum 39 as described above. The slit 392 is formed at an angle corresponding to almost half rotation of the ladder drum 39, and a photo interrupter 41 is provided to detect the position of the slit 392. The photo interrupter 41 detects the position of the slit 392, converts it into an electric signal, and gives it to the MPU 34. The MPU34 responds to this electrical signal by
The angle of the ladder drum 39, that is, the angle of the slats 13 can be known. The lower limit setting switch 42 is for setting the lowering position when the blind is lowered.
It consists of two switches. It should be noted that the lower limit setting switch 42 is not limited to this number and may be any number, and is determined by how finely the setting range of the lower limit position is set.

The switches 21 to 25, the clock generation circuit 43 and the reset circuit 44 of the controller 2 are connected to the MPU 34. In the above-mentioned embodiment, the position of the blind and the angle of the slat are detected by detecting the interruption of the slit with the photo interrupter, but the invention is not limited to this, and the change of the reflectance of light and the change of the pattern. Alternatively, it may be detected by utilizing changes in magnetic properties.

Further, in the above-described embodiment, the drum shaft 40 and the winding drum 37 are integrally formed, but the present invention is not limited to this, and they may be separately formed and housed in the drum case 50. Good.

[Effects of the Invention] As described above, according to the present invention, the second drum for adjusting the angle of the blades can be detachably attached to the elevating unit, so that various slats can be simply assembled by combining the components. A lifting unit corresponding to the width can be easily supplied, and the rotation amount of the first drum used for lifting by the first and second detection means and the rotation amount of the second drum used for angle adjustment. Since the position is detected, it is possible to easily detect the vertical position and angle of the slat.

[Brief description of drawings]

FIG. 1 is a sectional view showing the structure of an elevating unit for an electric blind according to an embodiment of the present invention. FIG. 2 is a plan view of FIG. FIG. 3 and FIG. 3A are views showing the internal structure of a part of the lifting unit. FIG. 4 is a diagram showing an outline of the overall configuration of an electric blind to which an embodiment of the present invention is applied. FIG. 5 is a schematic block diagram showing an electric configuration of an electric blind to which an embodiment of the present invention is applied. In the figure, 37 is a take-up drum, 38 and 41 are photointerrupters, 39 is a ladder drum, 40 is a drum shaft, 50 is a drum case, 51 and 52 are through holes, 53 is a support base, 54 is a claw,
55 is a guide holder, 56 is a metal bush, 57 is a clutch spring, 58 is a sensor substrate, 59 is a bearing, 371 and 391 are guides, and 374 is a hole.

Claims (1)

[Claims] 1. An elevator unit provided on an electric blind for raising and lowering a blade of a blind and adjusting an angle of the blade, comprising a drum case and a first belt-shaped member used for raising and lowering the blade. A first drum rotatably held in the drum case for winding or rewinding, and a rotary shaft inserted into the center of the drum from the outside; and a first drum rotatably held in the drum case from the outside. A rotating member that rotates together with the rotating shaft that is inserted, and a second belt-shaped member that is used to adjust the angle of the blades are arranged in the drum case for winding or rewinding,
A second drum removably mounted on the rotating member; and a first detection arranged in the drum case for detecting a rotation amount of the first drum for detecting an ascending / descending position of the blade. And a second detection unit that is disposed in the drum case and that detects a rotation amount of the second drum to detect the angle of the blades.