JPH0340196B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shutter control device, and its purpose is to forcibly stop the shutter when the shutter is opened or closed, so that the motor immediately stops and the shutter is opened or closed. It is an object of the present invention to provide a shutter control device that can stop the motor in the middle of the operation and prevent the motor from becoming overloaded.

Examples will be described below using figures. 1 to 5 show one embodiment of the present invention,
1 is a horizontally long strip-shaped shutter piece, and the window 1 opens inward.
The shutter 2 disposed outside of the shutter element 7 is formed by rotatably engaging the upper and lower ends of the plurality of shutter element pieces 1, respectively. This shutter piece 1 is constructed by filling a hollow portion of a flat cylinder 10 formed by sheet metal processing an aluminum plate with a synthetic resin foam 11 to obtain heat insulation and a cooling effect. An engagement protrusion 13 having a hook 12 at the tip is provided protrudingly on the upper end surface of the shutter element 1, and an engagement recess 14 that engages with the engagement protrusion 13 is recessed on the lower end surface of the shutter element 1. An engagement piece 15 is provided on the opening edge of the engagement recess 14 to catch and lock the hook 12, and each shutter element 1 engages with the engagement recess 14 as shown in FIG. The projecting piece 13 is engaged, and the hooking claw 12 is engaged with the locking piece 15, so that the hook 12 is rotatably engaged. The through holes 16 formed in the engaging projecting piece 13 are for ventilation or lighting, and when the lower end of the shutter 2 does not touch the lower stile of the window frame 18, each shutter element piece 1 Figure 3a
They are each suspended as shown in the figure, and ventilation or lighting is performed through the through holes 16. On the other hand, when the lower end of the shutter 2 comes into contact with the lower sill of the window frame 18, the engagement protrusion 13 of each shutter element 1 is completely accommodated in the engagement recess 14, and each shutter element 1
As shown in FIG. 3B, the holes 16 are overlapped with each other, and the through holes 16 are hidden, so that ventilation or lighting is not performed, and the outside is completely cut off. Reference numeral 3 denotes a winding shaft which is disposed above the window 17 and rotated by a motor 4. The upper end of the shutter 2 is wound around the winding shaft 3, and the shutter 2 is rotated by rotating the motor 4 in the forward and reverse directions. It can be rolled up and lowered freely. In the figure, 20 is a transmission gear that transmits the rotation of the motor 4 to the take-up shaft 3, 21 is a shutter storage section, 22 is a shutter guide, 23 is a shutter drive system storage section,
24 is an operation section.

A control device that controls opening and closing of the shutter 2 will be described below. FIG. 4 is a circuit diagram showing the overall configuration of the control device, and includes an open switch S ₀ consisting of a push button switch, a normal rotation relay Ry ₂ operated by closing the close switch S _C , and a normally open contact R of the reverse relay Ry ₃ . ₂ C,
R ₃ C is inserted into the power supply circuit of the motor 4 to switch the motor 4 between forward and reverse directions. In addition, both relays Ry ₂ and Ry ₃ are self-held by normally open contacts R ₂ a and R ₃ a, respectively, and normally closed contacts R ₂ b and R ₃ b are inserted into the other relay circuit. Therefore, both relays Ry ₂ and Ry ₃ do not operate at the same time, and the normally closed contact of stop relay Ry ₁
By opening R ₁ a, both relays Ry ₂ ,
The self-holding of Ry ₃ is released and the motor 4 is stopped. In the figure, AC is a commercial power supply, and _CM is a phase advance capacitor. FIG. 5 shows the intermediate stop circuit 9 of the shutter 2, and 6 is a reflective type that detects whether the light projected from the light projecting section 6a is reflected by an object and received by the light receiving section 6b. This is a mark detector consisting of a photoelectric switch, and this mark detector 6
is provided in the shutter housing 21 so as to face one side end of the shutter 2, and is adapted to detect the mark 5 corresponding to each shutter piece 1. As shown in FIG. 3, this mark 5 is formed by pasting a black sticker 5a (shaded area) to the end of each shutter piece 1 which has been painted white. Therefore, the output V _a of the mark detector 6
is as shown in Figure 6. 6c in the figure is an internal circuit,
Q ₁ is the output transistor and R ₁ is the collector resistor. 7 is a monostable multivibrator (formed by IC74121) whose pulse width is set by a capacitor C ₁ and a resistor R ₂ , and is triggered when the output V _a of the mark detector 6 changes (rise).
As shown in FIG. 6, a pulse corresponding to mark 5 is outputted V _n . 8 is monostable multivibrator 7
This is a motor stop circuit that stops the motor 4 when the output Vm is not obtained for a preset period of time ts or _more , and includes a stop relay Ry ₁ and a transistor Q ₂ .
Q ₄ , a capacitor C ₂ , resistors R ₃ to _{R 6} and a stop switch S _s consisting of a push button switch. The intermediate stop circuit 9 is composed of the monostable multivibrator 7 and the motor stop circuit 8, and when the mark 5 is not detected for a preset period of time _tS or more, that is, the shutter 2 is activated for a certain period of time _tS.
When the motor is in the stopped state, the motor 4 is stopped.

The operation of the embodiment will now be described. now,
When the shutter 2 is closed and the open switch S ₀ is pressed, the normal rotation relay Ry ₂ operates and the normally open contact R ₂ c is closed, the motor 4 rotates in the normal direction, and the shutter 2 rotates toward the take-up shaft. 3, and the shutter 2 gradually begins to open. At this time, if the open switch S ₀ is pressed for a certain period of time or more, the normally closed contact R ₁ a of the stop relay Ry ₁
When S 0 is closed, forward relay Ry ₂ is self-held, and from then on, even if you release open switch S ₀ , the normally closed contact remains.
The motor 4 is rotated forward until R ₁ a is opened, and the shutter 2 is hoisted. In this case, the stop relay
Ry ₁ is a capacitor charged via resistors R ₄ and R ₅
The voltage V _C2 across C ₂ is the drive transistor Q ₃ ,
It is designed to operate when the switching threshold voltage Vth, which is the sum of the base-emitter voltages of Q ₄ , becomes larger than the switching threshold voltage Vth, and by gradually winding up the shutter 2, the pulse output V from the monostable multivibrator 7 is generated. When _n is obtained continuously at a substantially constant period, the transistor Q ₂ turns on successively and discharges the charge in the capacitor C ₂ , so the voltage V _C2 across the capacitor C ₂ exceeds the threshold voltage Vth. Since the transistors Q ₃ and Q ₄ remain off, the stop relay Ry ₁ does not operate. On the other hand, when the shutter 2 is forcibly stopped, the output V _a of the mark detector 6 is fixed at either the "H" level or the "L" level, and the monostable multivibrator 7 Pulse output
Since V _n cannot be obtained, after a certain time t _S set by the time constants of resistors R ₄ and R ₅ and capacitor C ₂ , the voltage V _C2 across capacitor C ₂ exceeds the threshold voltage Vth and the transistor Q ₃ and _Q4 are turned on, the stop relay Ry ₁ is operated, the self-holding of the forward rotation relay Ry ₂ is released, and the motor 4 is stopped. Therefore, the time during which the motor 4 is operated with overload while the shutter 2 is forcibly stopped does not exceed the predetermined time _tS . Note that the time t ₀ for pressing the open switch S ₀ in order to self-hold the forward rotation relay Ry ₂ is such that the first mark 5 is detected by the mark detector 6 after the shutter 2 starts opening, and the monostable multivibrator 7 is detected. It is longer than the time from when the pulse output V _n is first obtained. That is, it is sufficient to press open switch _S0 until the charge in capacitor _C2 is discharged, transistors _Q3 and _Q4 are turned off, and normally closed contact _R1a of stop relay _Ry1 is turned on. Also,
Stop switch connected in parallel to transistor Q ₄
When S _S is closed, stop relay Ry ₁ is activated immediately, self-holding of normal rotation relay Ry ₂ is released, and motor 4 is stopped.

Similarly, by pressing the close switch S _C , the reversing relay Ry ₃ is activated, the motor 4 rotates in the reverse direction, and the shutter 2 is lowered and closed. In this case, if the shutter 2 is stopped by pressing the stop switch S _S or forcibly stopping the shutter 2 without the lower end of the shutter 2 contacting the lower sill of the window frame 18, each shutter of the shutter 2 A through hole 16 for ventilation and lighting is formed between the pieces 1 as shown in FIG. 3a. In addition,
In order to stop the motor 4 immediately when the shutter 2 is in the open or closed state, a mark is detected approximately a fixed time t _S before the shutter 2 is completely opened or closed. Mark 5 with instrument 6
is detected, and it is sufficient to prevent it from being detected in the future. In this way, when the shutter 2 is opened and closed, the time during which the motor 4 is overloaded can be minimized.

FIG. 7 shows another embodiment, in which a through hole 16 formed in the engaging protrusion 13 of the shutter element 1 is also used as the mark 5,
The mark detector 6 for detecting the mark 5 formed by the transparent hole 16 uses a transmission type photoelectric switch in which a light emitting part 6a and a light receiving part 6b are opposed to each other. 21
In this case, there is no need to take the trouble to provide the mark 5, so the cost is reduced.

As described above, the present invention forms a shutter by rotatably engaging the upper and lower ends of a large number of horizontally long strip-shaped shutter elements, and the upper end of the shutter is rotated by a motor for winding. In a shutter control device that can freely raise and lower a shutter by winding it around a shaft and rotating the motor in the forward and reverse directions, a mark corresponding to each shutter element is provided on one side end of the shutter, and the above mark is optically attached. A mark detector is installed opposite the above-mentioned side end of the shutter, and a monostable multivibrator is triggered when the output of the mark detector changes, and the monostable multivibrator output is activated for a preset period of time or more. This system is equipped with a motor stop circuit that stops the motor when the shutter cannot be opened or closed, and an intermediate stop circuit that stops the motor when the shutter is opened or closed. In this case, the motor is only overloaded and reversed for a certain period of time set by the motor stop circuit, and continuous overload is prevented. This has the advantage that failures such as burnout do not occur.

[Brief explanation of drawings]

Figure 1a is a front view of an embodiment of the present invention as seen from the indoor side, Figure 1b is a side sectional view of the same, Figure 2 is a perspective view of the main parts of the same, and Figures 3a and b are the same as the same. A front view of main parts showing the operation, FIGS. 4 and 5 are circuit diagrams of the same as above, and FIG. 6 is a time chart showing the operation of the above.
FIG. 7 is a sectional view of a main part of another embodiment. 1 is a shutter element, 2 is a shutter, 3 is a winding shaft, 4 is a motor, 5 is a mark, 6 is a mark detector, 7 is a monostable multivibrator, 8 is a motor stop circuit, and 9 is an intermediate stop circuit. .

Claims (1)

[Claims] 1 A shutter is formed by rotatably engaging the upper and lower ends of a large number of horizontally long strip-shaped shutter elements, and the upper end of the shutter is wound around a winding shaft that is rotationally driven by a motor. In a shutter control device that can freely wind up and lower a shutter by forward and reverse rotation, a mark corresponding to each shutter element is provided at one side end of the shutter, and a mark detector optically detects the mark. is installed opposite the side end of the shutter, and includes a monostable multivibrator that is triggered when the output of the mark detector changes, and a monostable multivibrator that activates the motor when the monostable multivibrator output is not obtained for a preset period of time. A shutter control device characterized by being provided with an intermediate stop circuit consisting of a motor stop circuit for stopping the motor.