JP3508583B2 - Elevating clothesline - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting and lowering apparatus.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 19 and 20, a pair of left and right pantograph-type telescopic arms for suspending a clothesline 9 in a storage box 2 which is attached to an opening 85 in the ceiling and which opens downward. The upper end of 80 is attached, the wire 11 is wound up and down by the DC motor 4, and the pantograph-type telescopic arm 80 is stored in the storage box 2 or is extended below the storage box 2 to pull out the clothesline 9. There is known a lifting and lowering device 1'which is vertically movable in a room. Reference numeral 82 in FIG. 30 is a mounting frame for the clothesline 9.

Here, a child hangs on the clothes-drying rod when the clothes-drying rod 9 is moved up or down, or when the clothes-drying rod is stored up (when stored in the storage box), the clothes-drying rod is pulled to an opening edge of the ceiling or a makeup cover. If it is applied, the DC motor 4 will be overloaded, causing a failure of the lifting and lowering device.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to stop a motor output when a motor is overloaded to cause a failure. The purpose of this is to provide a lifting / drying device that can prevent such a situation.Another purpose is to be able to stop the motor instantaneously, and to cope with abnormal situations such as a power outage or a clothesline being caught by something. To provide a lifting and lowering device.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention proposes a wire for suspending a clothesline 9 in a storage box 2 which is attached to an opening of a ceiling and which opens downward.
A motor 4 for winding up and lowering of Ya, together with the housing and a control unit for controlling the motor <br/> coater 4, the operation switch to move up and down the clothes drying place <br/> and rod up and down a lifting clothes device provided comprises an overload detection means for stopping the predetermined time the motor output by detecting that load on the clothespole 9 is overloaded, at intervals of a predetermined time, the
An overload was detected a predetermined number of times by the overload detection means.
Time, or the elevating operation by the motor is for a predetermined time
When frequently input at an interval within
It is characterized by disabling the raising and lowering operation by the switch, and by configuring in this way, for example, when the clothesline 9 is raised and lowered, a child hangs on the clothesline 9 or when the clothesline 9 is stored and raised (a storage box). Even when the clothes drying pole 9 is caught in the opening edge of the ceiling or the cosmetic cover etc. when the motor 4 is overloaded when it is stored in 2), the failure of the motor 4 is prevented by stopping the motor output. Can be prevented.

Further, the overload detecting means detects the magnitude of the current supplied to the motor 4, the magnitude of the rotation speed of the motor 4, or the drop of the power supply voltage of the motor 4. preferable.

Further, according to the present invention, a motor 4 is installed in a storage box 2 which is attached to an opening portion of the ceiling and which is opened downward.
And a control unit for controlling the motor 4, and
A wire lifting device for suspending a clothes-drying rod 9 is wound up by a motor 4, and the clothes-drying rod 9 can be lifted up and down by the motor 4, and a first lifting switch is provided between a power supply side and a ground side. The element 41 and the second lowering switch element 44 are connected in series, and the first lowering switch element 43 and the second rising switch element 42 are connected in series, so that the first rising switch element 41 is connected. The motor 4 is connected between a connection point between the first lowering switch element 43 and the second lowering switch element 44 and a connection point between the first lowering switch element 43 and the second lowering switch element 42, and at least the first lifting switch element 44 is connected. Switch element 41 and first descending switch element 43
And diodes 45 and 46 respectively connected in parallel to the first and second switching elements 4 for raising when the clothesline 9 is raised.
A motor drive circuit 40 that turns on only 2 to rotate the motor 4 in the forward direction and turns on only the first and second descending switch elements 44 when the clothesline 9 descends to rotate the motor 4 in the reverse direction. This motor drive circuit 40 is provided with a motor 4 which turns on the first lowering switch element 43 after a short circuit prevention period in which the second raising switch element 42 is turned off when the motor 4 stops rising.
Is configured to brake the motor 4 by power generation by rotation of the first rising switch element 41 after a short-circuit prevention period in which the second lowering switch element 44 is turned off when the lowering of the motor 4 is stopped. It is characterized in that the motor 4 is turned on and the motor 4 is braked by the electric power generated by the rotation of the motor 4. With such a structure, during the braking period, the first rising switch element 41 and Since both the first lowering switch element 43 are turned on, the regenerative current of the motor 4 flows in the loop circuit composed of the motor 4, the first rising switch element 41, and the diode 45 or 46 to cause the motor 4 to move. A magnetic flux is generated in a direction that cancels the rotation of the motor, which causes the motor 4 to be braked. As described above, since the rotation of the motor 4 can be braked by the power generation by the rotation of the motor 4, the motor 4 can be stopped instantaneously.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the embodiments of the present invention will be described. As shown in FIGS. 1 and 2, this lifting and lowering apparatus 1 is a storage box 2 which is attached to an opening of a ceiling and which is opened downward. A drive unit 5 having a DC motor 4 as a drive source, a control unit for controlling the drive unit 5, and a DC motor 4
And a transformer 10 for supplying a direct current to each of them are housed therein, and a wire 11 for suspending a clothesline 9 is wound up by a drive unit 5 and can be wound down and moved up and down.

As shown in FIG. 1, the top plate 3 of the storage box 2 is formed in a rectangular shape in plan view, and the drive unit 5 is stored in the lower surface of the top plate 3 along the longitudinal direction A thereof. The drive unit case 6, the transformer 10 and the control unit case 8 are attached respectively.

As shown in FIG. 5, the drive unit case 6 is integrally formed with a motor chamber 23 for accommodating the DC motor 4 and a gear chamber 24 for accommodating the reduction gear 25. A worm gear 27 is attached to the rotary shaft 26 of the DC motor 4.
Is pressed into the worm gear 27.
It is rotatably supported by the drive unit case 6 by 8.
In this example, the reduction gear 25 includes a worm wheel 29 that meshes with the worm gear 27, an intermediate gear 31 that meshes with the worm wheel 29, and a final gear 30 that meshes with the intermediate gear 31. Rotating drum 3 for winding up and down the wire 11 shown
2 are connected, and the rotational force of the DC motor 4 is reduced by the reduction gear 25 and transmitted to the rotary drum 32. In FIG. 2, reference numeral 21 is a remote control light receiving portion, and 22 is a light receiving substrate.

To the rotary drum 32, one ends of two right and left wires 11 for suspending the clothesline 9 are attached. The other ends of the wires 11 are hung downward via pulleys 33 attached to both ends in the longitudinal direction of the storage box 2, and the ends of the clothesline 9 are suspended and supported by the lower ends of the wires 11. . In this example, the vertical load applied to the wire 11 (indicated by the arrow a in FIG. 4) acts on the rotating drum 32 in the counterclockwise direction b,
Therefore, the worm wheel 29 also acts in the same direction as in (b), so that the worm gear 27 is pressed in the direction c in which the worm gear 27 is press-fitted into the rotating shaft 26 of the DC motor 4. At this time, the direction (c) of the load applied to the worm gear 27 coincides with the direction in which the worm gear 27 is press-fitted into the rotary shaft 26 of the DC motor 4, so that the worm gear 27 is simply press-fitted into the rotary shaft 26. Two
7 has a structure in which it does not come off the rotating shaft 26.

Further, in this example, as shown in FIG. 5B, the worm gear 27 has a larger inner diameter a on both sides than a middle inner diameter b and an outer diameter on both sides than a middle outer diameter c. d
Is formed in a substantially tubular shape with a reduced size. in this way,
Since the relations of a> b and c> d are satisfied, the tip of the rotary shaft 26 can be easily press-fitted in the middle of the worm gear 27. Figure 5
D in (b) indicates the press-fitting range of the worm gear 27. Further, the outer peripheral end of the worm gear 27 has a bearing portion 28.
The receiving portion 34 is supported by the receiving portion 34.
This prevents eccentric rotation of the worm gear 27. Further, by providing the receiving portions 34 having the same length at both ends of the worm gear 27, the worm gear 27 can be used in either the left or right direction.

On the other hand, the control unit case 8 for accommodating the control unit is formed in a flat shape as shown in FIGS. 1 and 2, and has a plurality of end surface portions which are upper sides when the control unit case 8 is vertically arranged. Further, a screw hole portion 35 fixed to the top plate 3 is provided. In the control unit case 8, the flat control unit case 8 is oriented vertically so that the surface on which the screw hole portion 35 is provided faces upward, and the side surface of the control unit case 8 is the longitudinal direction of the top plate 3. It is attached to the top plate 3 so as to be located on a straight line connecting the drive unit case 6 and the transformer 10 in the state facing the direction A. At this time, the engaging portion 12 is provided on the upper surface of the control unit case 8 so as to project laterally, and when the control unit case 8 is attached to the top plate 3, the engaging portion 12 is mounted on the drive unit case 6. The flat control part case 8 can be stably attached to the drive part case 6 by hooking on the end face. Reference numeral 35a in FIG. 2 denotes a screw mounting portion provided on the top surface of the drive unit case 6 to the top plate 3.

Further, in the embodiment shown in FIGS. 1 to 3, the drive unit 5 detects the upper limit position P1, the lower limit position P2, and the drying position P3 of the clothes rod 9 shown in FIGS. 13 are provided. The upper limit position P1 is a position where the clothesline 9 is stored, the lower limit position P2 is a position where the laundry is hooked on the clothesline 9 and is hung, and the drying position P3 is the laundry hooked at the lower limit position P2. Is a position at which it is dried up to near the upper limit position P1. The position at which the laundry is dried is not limited to the drying position P3, but can be arbitrarily set by the stop switch of the remote controller.

In this example, the drying position P3 of the clothesline 9 is
Volume resistance 5 whose resistance changes electrically by rotation
4, and the upper limit position P1 and the lower limit position P2 are detected by the photo interrupter 43 and the detection disk 15 with the light shielding plate 39. The detection board 37 to which the photo interrupter 43 is attached is, as shown in FIG.
Is attached to a plurality of mounting bosses 36 projecting from the outer surface of the detection board 15, and the detection disk 15 is rotatably arranged between the detection board 37 and the drive unit case 6. 38 in FIG.
Is a substrate pressing member. On the surface of the detection disk 15, a light shielding plate 39 having a substantially circular arc shape concentric with the rotation center of the detection disk 15 is projected, and a gear portion 40 formed on the outer peripheral surface of the detection disk 15 is provided. The pinion 42 fitted in the motor output shaft 41 protruding to the outside of the drive unit case 6 meshes.

Here, in the case where the clothes-drying rod 9 is moved up and down by the raising switch, the descending switch, and the stop switch provided on the remote controller, the clothes-drying rod 9 is moved from the lower limit position P2 shown in FIG. 7 to the drying position P3. When raising, the wire 11 is taken up by pushing the raising switch once, and the clothesline 9 starts to rise. At this time, the motor output shaft 41 starts to rotate the detection disk 15 via the pinion 42, and the volume resistance is increased. 4, the predetermined rotation amount of the detection disk 15 (the clothesline 9 is at the drying position P3
The rotation angle at the time of arrival is detected, and the control unit stops the driving of the DC motor 4 based on this, and the clothesline 9 automatically stops at the clothesline position P3. Therefore, even if the user forgets to press the stop switch at the drying position P3 while operating the remote controller or leaves the place for business, the clothesline 9 will automatically move at the predetermined drying position P3. It will stop. After that, by continuing to push the raising switch, it is possible to raise from the drying position P3 to the upper limit position P1.
It is possible to prevent the end of the clothes-drying rod 9 from being caught or hit by, for example, the opening edge of the ceiling, the decorative cover, or the like when storing up to 1. That is, since the user can confirm the clothes-drying rod 9 when the clothes-drying rod 9 moves up to the upper limit position P1, it is possible to prevent a mistake in storing the clothes-drying rod 9 such as soiling the laundry.

It is to be noted that the clothesline 9 has a lower limit position P shown in FIG.
2 and the upper limit position P1, the light shield plate 39 provided on the detection disk 15 does not pass between the photo interrupters 43, while the clothesline 9 is located at the upper limit position P.
When it reaches 1, one end in the length direction of the light shield plate 39 enters between the photo interrupters 43, and when the clothesline 9 descends to the lower limit position P2, the other end in the length direction of the light shield plate 39 is reached. The positional relationship between the light shielding plate 39 and the photo interrupter 43 shown in FIG. 3 is set so as to enter the space between the photo interrupters 43. In this example, the photo interrupter 4
Reference numeral 3 denotes a normally open type, which allows the DC motor 4 to be driven when the light shield plate 39 does not pass between the photo interrupters 43, and drives the DC motor 4 when the light shield plate 39 enters between the photo interrupters 43. Is supposed to stop.

Thus, the positions of the upper limit position P1 and the lower limit position P2 of the clothesline 9 are detected by the photo interrupter 43 and the detection disk 15, and the upper limit position P1 and the lower limit position P are detected.
By allowing the clothes-drying rod 9 to move up and down between the two, the position detection means 13 can prevent the clothes-drying rod 9 from being lowered or raised too much, which can enhance the safety of use and the detection disk 15 Since the clothes rod 9 rotates according to the amount of elevation, the upper limit position P1 and the lower limit position P2 of the clothes rod 9 can be accurately detected based on the rotation amount of the detection disk 15, and high reliability can be obtained. Further, since the photo interrupter 43 is configured so that the drive of the DC motor 4 is stopped when the light shield plate 39 enters between the photo interrupters 43, foreign matter other than the light shield plate 39 enters between the photo interrupters 43. Even at this time, since the drive of the DC motor 4 is stopped, malfunction can be prevented and safety can be ensured.

FIG. 6 shows a transition diagram of operating states of the control unit. In the figure, is the end of initial setting, is normal continuous operation, overload continuous operation, 'is time over,',
′, Indicates up switch input, ′, ′ indicates stop switch input, overload detection, time over, etc. ,, indicates down switch input, ′ indicates no up switch input, upper limit input ,, indicates power failure detection, and ′ indicates power failure detection cancellation ing. In this example, a standby mode, a mischievous evacuation mode, and a momentary stop mode are provided in addition to the storage raising mode (when the clothes rod is raised to the upper limit position and stored in the storage box), the raising mode and the lowering mode. ing. The mischievous withdrawal mode is a mode in which the output of the DC motor 4 is entered when the operation is repeated many times in a short time, and the operation is invalid while the operation is in this mode. For example, the rising input, the falling input, the stopping input, and the overload detection input are ignored. The states of the clothesline position detection input, power failure detection input, wire slackness detection input, etc. are stored in memory.

Here, as a condition for entering the mischievous evacuation mode, when the operation switch is frequently input at a certain interval within a predetermined time and the elevating operation by the motor is repeated, the mode is entered. For example, motor output ON, OF
This is the case where the operation is repeated 30 times or more at an interval of 1 minute or less. At this time, for example, a 1-minute timer is started when the motor output is turned off, and when the motor output is turned on again before the 1-minute timer times up, the counter is incremented by 1 and the 1-minute timer is stopped.
After that, when the motor output is turned off, the 1-minute timer starts again. After that, the 1-minute timer will increase the time
Each time the motor output is turned on, the count is repeated. Then, when the count number reaches 30, for example, the mischievous escape mode is entered. At this time, the operation of the up and down switches is invalidated and the motor output is kept off. That is, during the input processing in the mischievous retreat mode, the input of the ascending switch, the descending switch, and the stop switch is not accepted, and the motor output is not made. The counter is cleared when the time of the 1-minute timer is up. Then, after 5 minutes elapse in the mischievous escape mode, the mode shifts to the standby mode.

When an overload is continuously detected, the mischievous escape mode is entered. For example, this mode is entered when the overload is repeated 5 times at intervals of 30 seconds or less.
At this time, a 30 second timer is started. If the overload is detected again before the 30 second timer times up, the counter is incremented by 1 and the 30 second timer is reset to start the cat. Then, when the count number reaches 5, for example,
It shifts from the mischievous escape mode to the standby mode. Then, when the 30-second timer times up (when there is no overload detection before the 30-second timer times up), the counter is cleared at the time UP. In this way, by setting the mischievous withdrawal mode in which the mischief or overload is detected and the motor output is stopped, it is possible to prevent the failure of the lifting and lowering apparatus 1 from occurring.

Next, the overload detecting means will be described. This overload detection means detects that the load on the clothesline 9 is overloaded and stops the motor output for a certain period of time. As a method of detecting the overload, in the present invention, the motor 4 is supplied. One of the method for detecting the magnitude of the generated electric current, the method for detecting the magnitude of the rotation speed of the motor 4, and the method for detecting the drop in the power supply voltage is adopted.

Here, FIG. 9 shows the torque-current value characteristic, the torque-rotation speed characteristic of the motor 4, and the efficiency (EFF) and motor output (P) characteristics of the motor 4. In this example, the characteristic of the current value of the motor 4 in FIG. 9 is stored in memory, and the current value of the motor 4 during the actual lifting and lowering of the clothesline 9 is detected and compared, and the difference in the current value above a certain level is detected. When an "L" signal is input to the control unit, or the characteristics of the rotation speed of the motor 4 in FIG. 9 are stored in memory, and this and the rotation of the motor 4 when the clothesline 9 is actually lifted and lowered. The number of revolutions is detected by a revolution number detection sensor or the like and compared, and when the number of revolutions decreases more than a certain value, an "L" signal is input to the control unit.

On the other hand, FIGS. 10 to 13 show a case where a drop in the power supply voltage is detected. FIGS. 10 to 13 show schematic waveforms of the DC power supply voltage and the comparator voltage. When the clothes pole 9 is overloaded and the DC power supply voltage value falls below a certain level, the interrupts shown in FIGS. Signal (b)
Is input to the control unit. The waveform of the interrupt signal varies depending on the overload state, but when the pulse width of the interrupt signal is smaller than a certain period (for example, 16.6 ms or 20 ms), overload detection is performed. As shown in FIG. 13, the pulse width is a certain period or more (for example, 33.3 ms or 40 m).
In the case of s), overload detection is not reached and the motor output is continued.

Immediately after the overload is detected as described above, the motor output is stopped and the mode is shifted to the standby mode. At this time, the overload is detected only while the motor is being output, and even if it is detected in the standby mode, it is ignored. Further, in order to prevent erroneous detection due to the inrush current at the time of starting the motor 4, the 150 ms interrupt input and “L” input after the motor output is ignored. For example, when the input of the control unit becomes “L” after 150 ms, an overload confirmation timer (for example, 2
5 ms) to start. When the motor 4 is not activated, wait for the falling edge of the interrupt signal. When the falling edge of the interrupt signal is input, the 25 ms timer is started if not started, and if the 25 ms timer is started, the timer is stopped and overload detection is performed. After that, when the 25 ms timer is over and the input of the control unit is "H", the timer is cleared and the normal operation is resumed. Further, even when the input of the control unit is "L", if the power is out, the timer is cleared and returns to normal. If the power is not out, overload detection is performed.

FIG. 14 shows an example of the motor drive circuit 40, FIG. 15 shows an example of the motor stopping operation at the time of rising, and FIG. 16 shows an example of the motor stopping operation at the time of descending. In the motor drive circuit 40, as shown in FIG. 14, a first raising switch element 41 and a second lowering switch element 44 are connected in series between a power source side and a ground side, and The first descending switch element 43 and the second elevating switch element 42 are connected in series, and the first elevating switch element 41 and the second descending switch element 4 are connected.
The motor 4 between the connection point of the motor 4 and the connection point of the first lowering switch element 43 and the second lowering switch element 42.
And the diodes 45 and 46 are connected to the first raising switch element 41 and the first lowering switch element 43, and when the clothes rod 9 is raised, the first and second raising switch elements 41 and 42 are connected. When the clothes rod 9 is lowered, only the first and second lowering switch elements 43 and 44 are turned on to turn the motor 4 on.
To rotate in the opposite direction. And motor 4
Of the second rising switch element 42 when the rising of the
The first lowering switch element 43 is turned on after a short-circuit prevention period of F, and the motor 4 is braked by the power generation by the rotation of the motor 4. When the lowering of the motor 4 is stopped, the second switching element 43 is turned on. Switch element for lowering 44
The first rising switch element 41 is turned on after a short circuit prevention period in which the motor 4 is turned off, and the motor 4 is braked by the power generation by the rotation of the motor 4.

That is, when the motor 4 is stopped rising, the second rising switch element 42 is turned off to prevent a short circuit in the circuit, and as shown in FIG. 15, after the short circuit prevention period (for example, 5 ms) elapses, The lowering switch element 43 of 1 is turned on. At this time, the motor 4 tries to continue to rotate due to its inertia, but the regenerative current of the motor 4 flows in the loop circuit composed of the motor 4, the first lowering switch element 43, and the diode 45, and A magnetic flux is generated in the direction of canceling the rotation, which causes the motor 4 to be braked. This braking period (eg 10
0 ms), the first rising switch element 41 and the first lowering switch element 43 are turned off at the same time to prevent a short circuit of the circuit, and as shown in FIG. 16, a short circuit prevention period (for example, 5 ms). After the lapse of, the stop operation ends.
On the other hand, when the lowering of the motor 4 is stopped, the second lowering switch element 44 is turned off to prevent a short circuit in the circuit, and after the short circuit prevention period (for example, 5 ms), the first raising switch element 41 is turned on. To Also at this time, the motor 4, the first raising switch element 41, and the diode 46
The regenerative current of the motor 4 flows in the loop circuit constituted by and the motor 4 is braked, and after this braking period (for example, 100 ms) elapses, the first ascending switch element 41 and the first descending switch element. 43 and OFF are simultaneously turned off to prevent a short circuit in the circuit, and the stop operation is terminated after the short circuit prevention period (for example, 5 ms) has elapsed.

As described above, when the motor 4 is stopped, the rotation of the motor 4 is generated to brake the rotation of the motor 4, so that the motor 4 can be stopped earlier. Therefore, the motor 4 can be stopped first before the microcomputer of the control unit runs out of control in the event of a power failure, for example, and the safety of the lifting operation of the clothesline 9 can be ensured. Further, since a special motor lock device is unnecessary, the motor drive circuit 40 can be simplified.

Further, by using the above-mentioned motor drive circuit 40, when the clothes-drying rod 9 hits an object and is caught during the lifting operation of the clothes-drying rod 9, this motor 4
When the lock is detected, the motor 4 is reversely rotated for a predetermined time to invalidate the input operation. In other words, if it is rising
Both the first and second raising switch elements 41 and 42 are turned off.
FF, the first and second descending switch elements 43,
Both 44 are turned ON, while if descending, the first
And the second lowering switch elements 43 and 44 are both turned off
Then, the first and second rising switch elements 41, 42
Are both turned ON and the motor 4 is rotated in the reverse direction. For example, when the clothesline 9 is caught on the opening edge of the ceiling while the clothesline 9 is rising, the clothesline 9 is slightly moved downward, It is possible to prevent deformation.

When a power failure occurs, this is detected and a momentary stop mode is entered to stop the motor output. In this example,
In order to distinguish from motor output stop due to overload, Fig. 1
Reference numeral 7 indicates a half-wave input and a zero-cross input of the DC power supply voltage, and if there is a falling interrupt input at t1 in FIG. 17, the power failure timer is started. The count value of the timer is, for example, 15 ms. At time t3 in FIG. 17,
In other words, before the power failure timer times out (for example, 1
If there is a rising interrupt input at 6.6 ms or 20 ms, clear the power failure timer and restart the power failure timer. Then, when the power failure timer times out (point t2 in FIG. 17), the power failure is detected. When a power failure is detected, the motor 4 is immediately stopped while the motor is being output, and the mode is changed to the instantaneous stop mode. Set the memory to "power failure" except during motor output. If there is a falling interrupt input during the instantaneous stop mode, the power failure timer is cleared, the power failure timer is restarted, and the "power failure" in the memory is released. Then, if there is a power failure during the operation, it returns to the same operation mode. In other words, the instantaneous stop mode is to stop the motor output and wait for the recovery from the power failure.After the power failure is recovered, the ascending instantaneous stop mode (starts the ascending operation after recovery) and the descending instantaneous stop mode (the descending operation after recovery is performed. Start), and the storage rise instantaneous stop mode (starts the storage rise operation after returning). Further, when the condition for shifting to the standby mode is reached during the instantaneous stop mode, the standby mode is shifted. For example, if there is an input such as "stop", "wire 11 slack detection", "overload detection" in the instantaneous stop mode, it shifts to the standby mode, and in the instantaneous stop mode when the storage is raised, the input of the "lift switch" can be eliminated. For example, it shifts to the standby mode.

FIG. 16 shows the circuit structure of the switch of the remote controller. The stop switch SW1, the rising switch SW2, and the first resistance d1 are connected in series between the power supply and the ground, and the connection point between the stop switch SW1 and the rising switch SW2, the first resistance d1, and the ground are connected. The down switch SW3 and the second resistor are connected in parallel between the connection point and the connection point. All of the switches SW1 to SW3 are NC contacts, and are turned off when pressed. A power supply line L1 is connected between the power supply and the stop switch SW1,
One input line L2 is connected between the rising switch SW2 and the first resistance d1, and the other input line L3 is connected between the falling switch SW3 and the second resistance d2. Here, Table 1 shows a case in which each input of the switch ascending, descending, and stopping is judged in the 2-bit input state. In Table 1,
In case of simultaneous pressing, the input becomes L-L and it is judged as "stop". Further, all OFF in Table 1 means a state in which all the switches are not pressed. The confirmation of the above switch is performed, for example, by scanning every 25 ms and at the time of coincidence twice.

[0032]

[0033]

[Table 1] By the way, when the raising switch SW2, the lowering switch SW3, and the stopping switch SW1 are connected in parallel, three input lines are required, and a total of four wiring lines including the power source line are required. Then, as shown in FIG. 16, by connecting the stop switch SW1 and the raising switch SW2 in series and connecting the lowering switch SW3 in parallel with the raising switch SW2, the two input lines L2 and L3 and the power supply line L1 are connected. Since only 3 wires are required and the number of wires can be reduced, the wiring of the remote controller on the wall is also 3 wires.
This is possible with the main line, and the circuit structure can be simplified.

[0034]

As described above, according to the invention of claim 1 of the present invention, a wire for suspending a clothesline is wound in a storage box which is attached to an opening of a ceiling and which opens downward .
A motor for performing a raising and lowering can, together with the housing and a control unit for controlling the motor, up and down the laundry pole
A lifting / descending clothes-drying device having an operation switch for freely moving up and down, comprising overload detection means for detecting that the load applied to the clothes-drying rod is overloaded and stopping the motor output for a predetermined time, within a predetermined time. At the interval of
When the overload is detected a predetermined number of times by the
Is the interval during which the motor raises and lowers within a predetermined time.
When frequently input with,
Since the descending operation is disabled, a child hangs on the clothesline when raising or lowering the clothesline, or when the clothesline is stored up (when stored in the storage box), the clothesline is placed on the opening edge of the ceiling or on the makeup cover. Stops the motor output even when the motor is overloaded due to being caught . In addition, the operation switch may be
It is frequently input at certain intervals within a fixed time, and the motor
Stops motor output even when repeated lifting and lowering operations are performed.
By doing so, the occurrence of failure can be prevented in advance.

According to the invention of claim 2, in addition to the effect of claim 1, the overload detecting means detects the magnitude of the electric current supplied to the motor, so that the motor when the clothes rod is actually moved up and down. Is detected and compared with the torque-current value characteristic of the reference motor, the overload can be detected with a simple circuit configuration.

According to the invention of claim 3, in addition to the effect of claim 1, since the overload detecting means detects the magnitude of the rotation speed of the motor, the rotation of the motor during the actual lifting and lowering of the clothes rod. The overload can be detected with a simple circuit configuration by detecting the number and comparing it with the reference torque-rotation speed characteristic of the motor.

According to the invention of claim 4, in addition to the effect of claim 1, since the overload detecting means detects a drop in the power supply voltage of the motor, for example, the DC power supply voltage when the clothes rod is raised or lowered is detected. By comparing with the comparison voltage, overload can be detected with a simple circuit configuration.

According to a fifth aspect of the present invention, a wire is provided in which a motor and a control unit for controlling the motor are housed in a storage box which is attached to an opening in the ceiling and which opens downward, and which suspends a clothesline. A hoisting and lowering device which winds up and lowers a motor by a motor to lower and elevate a clothesline up and down. A first drying device is provided between a power supply side and a ground side.
And the second descending switch element are connected in series, and the first descending switch element and the second descending switch element are connected in series to form the first ascending switch element. A motor is connected between a connection point with the second descending switch element and a connection point with the first descending switch element and the second ascending switch element, and at least the first ascending switch element and the 1. A diode is connected in parallel to each of the lowering switch elements, when the clothes rod is raised, only the first and second raising switch elements are turned on to rotate the motor in the forward direction, and when the clothes rod is lowered, the first switch element is turned on. And a motor drive circuit that turns on only the second lowering switch element to rotate the motor in the opposite direction. This motor drive circuit is used for stopping the second raising switch when the motor is stopped. The first lowering switch element is turned on after a short circuit prevention period in which the switch element is turned off, and the motor is braked by the power generation by the rotation of the motor. Since the first rising switch element is turned on after the short circuit prevention period in which the lowering switch element is turned off and the motor is braked by the power generation by the rotation of the motor, the first Since both the ascending switch element and the first descending switch element are turned on, the motor, the diode connected in parallel with the first descending switch element, and the first ascending switch element are configured. The regenerative current of the motor flows through the loop circuit that is generated, and magnetic flux is generated in the direction that cancels the rotation of the motor. . In this way, the rotation of the motor can be braked by the power generated by the rotation of the motor, so that the motor can be stopped momentarily, and therefore the motor of the control unit can be stopped before it runs out of control, for example, during a power failure. It can be stopped first, and even when there is no power outage, it will be possible to deal with abnormal situations such as clothes hanging on something. Moreover, since a special motor lock device is unnecessary, the motor drive circuit structure is simplified.

[Brief description of drawings]

1A is a side view showing an example of an embodiment of the present invention, and FIG. 1B is a plan view.

FIG. 2 is a plan view of the drive unit case and the control unit case of the above.

FIG. 3 is an explanatory diagram of a position detection unit of the above.

FIG. 4 is a cross-sectional view illustrating a drive unit of the above.

FIG. 5A is a sectional view of the inside of a drive unit case, and FIG.
FIG. 4 is a sectional view of a worm gear.

FIG. 6 is an explanatory diagram of each of the lifting modes of the above-mentioned clothes-drying rod.

7A to 7C are explanatory views of an upper limit position, a drying position, and a lower limit position.

FIG. 8 is an explanatory diagram of an upper limit position, a drying position, and a lower limit position of the above.

FIG. 9 is a graph for explaining the torque-current value characteristic of the motor, the rotation speed characteristic of the motor, the efficiency of the motor and the output thereof in the same as above.

FIG. 10 is a waveform diagram showing a case where overload is detected from the power supply voltage and the comparator voltage of the above.

FIG. 11 is a waveform diagram showing a case where an overload is detected from the power supply voltage and the comparator voltage of the above.

FIG. 12 is a waveform diagram showing a case where an overload is detected from the power supply voltage and the comparator voltage of the above.

FIG. 13 is a waveform diagram showing a case where the above-mentioned overload is not reached.

FIG. 14 is a circuit diagram of a motor drive circuit of the above.

FIG. 15 is an explanatory diagram of a stopping operation at the time of rising in the above.

FIG. 16 is an explanatory diagram of a stop operation at the time of descending in the above.

FIG. 17 is an input waveform diagram in the case of the above power failure detection.

FIG. 18 is a circuit diagram of a switch of the above remote controller.

FIG. 19 is a front view of a conventional lifting and lowering apparatus.

20 (a) and 20 (b) are operation explanatory views of the lifting and lowering apparatus.

[Explanation of symbols]

1 Lifting and drying equipment 2 storage boxes 4 motor 9 clothesline 11 wires 40 motor drive circuit 41 First rising switch element 42 Second rising switch element 43 First descending switch element 44 Second descending switch element 45,46 diode

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noriyuki Kitachi, 1048, Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Works, Ltd. (72) Kenji Adachi, 1048, Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Works, Ltd. (72) ) Inventor Takasaku Inoue 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd. (56) Reference JP-A-10-179991 (JP, A) JP-A-10-77774 (JP, A) JP-A-10 -236783 (JP, A) JP 5-66838 (JP, A) JP 59-152435 (JP, A) JP 3-145984 (JP, A) (58) Fields investigated (Int.Cl) . ⁷ , DB name) D06F 57/12 B66D 1/58 H02P 3/08

Claims (5)

(57) [Claims] 1. A wire for suspending a clothesline in a storage box which is attached to an opening of a ceiling and which opens downward.
A motor that performs winding and lowering of, the housing and a control unit for controlling the motor, the laundry pole
An elevating and lowering device having an operation switch that can be vertically moved up and down , comprising overload detection means for detecting that the load on the clothesline is an overload and stopping the motor output for a predetermined time, and for a predetermined time. Within the interval, the overload detection
When the overload is detected a predetermined number of times by intelligent means,
Preferably, the raising / lowering operation by the motor is within a predetermined time.
When frequently input at intervals, the operation switch
An elevating and lowering device for drying up and down which invalidates the elevating and lowering operation . 2. The lifting and lowering apparatus according to claim 1, wherein the overload detection means detects the magnitude of the current supplied to the motor. 3. The lifting and lowering apparatus according to claim 1, wherein the overload detecting means detects the magnitude of the rotation speed of the motor. 4. The lifting and lowering apparatus according to claim 1, wherein the overload detection means detects a drop in the power supply voltage. 5. A motor and a control unit for controlling the motor are housed in a storage box which is attached to the opening of the ceiling and opened downward, and a wire for hanging the clothesline is wound up and down by the motor. A lifting and lowering device for lifting and lowering a hanging clothes rod up and down, wherein a first raising switch element and a second lowering switch element are connected in series between a power supply side and a ground side, The first descending switch element and the second ascending switch element are connected in series, and the connection point between the first ascending switch element and the second descending switch element and the first descending switch element and the first descending switch element are connected. A motor is connected between the connecting point and the second ascending switch element, and at least the first ascending switch element and the first descending switch element are each connected in parallel with a diode to dry clothes. When the pole is raised, only the first and second raising switch elements are turned on to rotate the motor in the forward direction, and when the clothesline is lowered, only the first and second lowering switch elements are turned on and the motor is reversed. The motor drive circuit rotates the first descending switch element after a short-circuit prevention period in which the second ascending switch element is turned off when the motor is stopped rising. , The motor is braked by the power generated by the rotation of the motor, and the second lowering switch element is OF when the lowering of the motor is stopped.
An elevating and lowering device according to claim 1, wherein the first lifting switch element is turned on after a short circuit prevention period of F, and the motor is braked by electric power generated by rotation of the motor.