JPH07100106B2 - Door opening / closing device for rotating drum - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door opening / closing device for a rotary drum, and more particularly to an opening formed in a drum peripheral wall like a rotary drum used in a drum type washing machine or a drum type dryer. And a door opening / closing device for a rotary drum that automatically opens and closes the drum door of the opening.

[Prior Art] Conventionally, for example, a rotary drum used in a drum-type washer / dryer or the like has an opening as a loading / unloading opening for laundry on its peripheral wall, and can slide on the drum peripheral wall to open / close this opening. Equipped with a drum door.

FIG. 9 is a schematic perspective view of a conventional drum type washer / dryer.

In the figure, a rotary drum 2 for rotatably performing a washing / drying process therein is rotatably supported in a casing 1. The peripheral wall 2a of the rotary drum 2 is provided with a drum door 3 that opens and closes an opening for taking in and out laundry, and the drum door 3 is locked to the rotary drum 2 in a closed state. The latch 4 is attached. Casing 1
An opening 5 is provided on the upper surface of the, and an outer lid 6 for opening and closing the opening 5 is further axially attached.

Therefore, in such a drum type washer / dryer, when the laundry or the dried product in and out of the rotary drum 2 is taken in and out, first, the outer lid 6 is opened, and the rotary drum 2 is manually rotated to rotate the drum door 3 After facing the position of the opening 5 to the opening 5, the hook 4 of the rotating drum 2 is released, the drum door 3 is slid to open the laundry loading / unloading opening of the drum, and the loading / unloading of the laundry or dried material is performed. Is going.

[Problems to be Solved by the Invention] In the conventional drum type washer / dryer as described above, the operator manually aligns the rotary drum 2 with the opening 5 and opens / closes the drum door 3. Therefore, there is a problem that the operation is complicated and the workability is poor.

Also, the closing operation of the drum door may not be performed reliably,
Alternatively, if the user forgets to close it, there is a risk that the contents will fly out by rotating the drum and damage the contents or damage the equipment and other components.

Therefore, the present applicants in Japanese Patent Application No. 63-50251
We are proposing a drum type washer / dryer that can automatically open and close the rotating drum door.

However, the problem with the above-mentioned drum type washer / dryer is that when the drum door of the rotating drum is closed, it is impossible to judge whether the drum door is completely locked to the rotating drum. Is.

That is, when clothes are put into the rotating drum when washing or drying the clothes, even if the drum door is closed while a part of the clothes is hooked on the opening edge of the rotating drum, and the door stopper operates, The hook part does not always lock the rotating drum to lock the drum door, but it is often put in the unlocked state, and the drum door opens and the clothes inside pop out while the rotating drum rotates. I was afraid.

Therefore, the present invention has been made to solve the above-described problems, and prevents incomplete engagement of the drum door with respect to the rotating drum when the door is closed, and can reliably close the door. An object is to provide a switchgear.

[Means for Solving the Problems] A door opening / closing device for a rotary drum according to the present invention controls a rotary drum that is rotated by a drum drive motor in a casing, and controls the drum drive motor to open and close the rotary drum. Position and a motor control means for rotating to a door opening completion position, a drum door provided on the peripheral wall of the rotary drum and slidably attached to the outer periphery of the rotary drum for opening and closing the drum opening of the rotary drum, It is installed on the drum door,
A door stopper that locks or unlocks the drum door with respect to the rotating drum, a drum position detecting unit that detects a door opening / closing position and a door opening completion position of the rotating drum, and the rotating drum is a door. When moved to the open / close position,
The door stopper holds the drum door in an unlocked state by the door stopper, holds the drum door in an immovable state with respect to the casing, and closes the drum door when the lock of the door stopper is confirmed. A door lock means for holding the door lock means so as not to turn in the opening direction; a door lock control means for controlling the door lock means in accordance with opening and closing of the drum door; A drum brake that locks the drum at a door opening / closing position or a door opening completion position, a brake control unit that controls the drum brake, and a door opening / closing position or a door opening completion position of the rotary drum based on a signal from the drum position detection unit. When the door lock state was confirmed, it was judged that the door stopper was completely locked, and the door lock state could not be confirmed. Can is for and a position confirmation means for a predetermined number of times the door open and the door closing operation of the rotary drum by controlling the motor control means and the brake control means until a confirmation of the door lock state repeatedly executed.

[Operation] In the present invention, when the drum door of the rotary drum is automatically closed, first, the motor control means gives a start command to the drum drive motor to rotate the rotary drum in the clockwise direction, and accordingly the position confirmation is performed. When the means confirms the door opening / closing position based on the signal from the drum position detecting means, the rotating drum is further rotated clockwise for a predetermined time, and then the rotating drum is stopped. After that, an operation command is given to the door lock control means to operate the door lock means to release the lock release with respect to the door stopper and shift to the lock confirmation posture of the door stopper. After rotating the rotary drum counterclockwise again for a predetermined time, the position confirmation means confirms whether the rotary drum is in the door open / closed position.When the door open / closed position can be confirmed, the door stopper is completely locked. If the door open / closed position cannot be confirmed because the rotating drum moves to the next operation and laundry is caught in the drum opening, it is determined that the door stopper is not completely locked, The lock means is operated to unlock the door stopper and the rotary drum is rotated in the door opening direction. At that time, the rotary drum is stopped when the position confirmation means confirms the door opening completion position, and the door is closed again. To execute. Then, until the lock of the door stopper with respect to the rotating drum can be confirmed, the lock of the door stopper is confirmed by repeating the door opening and closing operations a predetermined number of times. Therefore, when the door is closed, a method is used to check the locked state of the door stopper on the rotating drum, so the drum door is rotated for washing or drying with the door stopper incompletely locked. It is possible to prevent problems that occur.

Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a conceptual diagram showing the overall structure of a door opening / closing device for a rotary drum which is an embodiment of the present invention.

In the figure, a rotary drum 2 is rotatably supported in a casing 1, and an opening 2b provided in a peripheral wall of the rotary drum 2 is opened and closed by a drum door 3. It is provided slidably in the circumferential direction of the drum. The drum door 3 is provided with a door stopper 7 for locking the drum door 3 to the rotary drum 2 in a closed state.

A rotary drive of the rotary drum 2 during washing / drying and opening / closing of the door is performed by a motor 8. The motor 8 controls the rotational speed and the rotational direction of the motor 8. Reference numeral 10 denotes a drum position detecting means for detecting a door opening / closing position, a door opening completion position and a door closing / locking state of the rotating drum 2. For example, a magnetic sensor or an optical sensor installed in an outer tank (not shown) and a rotating drum. And a flag such as an iron piece attached to the pulley portion of No. 2 and the flag corresponds to the sensor, thereby opening and closing the door of the rotary drum 2,
The door open completion position and the door lock position are detected, and these output signals are input to the position confirmation means 11.

The position confirming means 11 confirms the door open / close position, the door open completion position, or the door lock state of the rotary drum 2 based on the signal from the drum position detecting means 10, and the lock state of the drum door 3 with respect to the rotary drum 2. When is not confirmed, the control command is output to repeat the door opening and closing operations a predetermined number of times until the door lock can be confirmed.

The door lock means 12 is disposed in the casing 1 near the outer periphery of the drum, and unlocks the door stopper 7 when the rotary drum 2 is indexed to the door open / close position when the door is opened to lock the drum door 3. The door lock control means for holding the drum door 3 closed at the time of confirming the lock of the door stopper so as not to rotate in the door opening direction and controlled by the signal output from the position confirming means 11. Controlled by 13.

The drum brake 14 locks the rotating drum 2 by braking the rotating drum 2 at the door opening / closing position and the door opening completion position, and the drum brake 14 locks the position confirming means 11.
Is controlled by a brake control means 15 controlled by a signal from the door lock control means 13 and a signal from the door lock control means 13.

FIG. 2 is an explanatory view showing how the drum door of the rotary drum door opening / closing device according to an embodiment of the present invention is attached to the rotary drum, and FIG. 3 is a rotary drum door according to an embodiment of the present invention. FIG. 4 is a perspective view of a drum door of the opening / closing device, and FIG. 4 is a main configuration diagram of door locking means of the door opening / closing device of the rotary drum according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a mounting state of the drum door 3 to the rotary drum. The drum door 3 opens and closes a drum opening 2b provided on the peripheral wall of the rotary drum 2, and is slidably mounted on the outer periphery of the rotary drum 2 so that the drum opening 2b can be opened and closed.

FIG. 3 is a perspective view of the drum door 3. Sliding grooves 3a are provided on both sides of the drum door 3, and these sliding grooves 3a are
It engages with ribs (not shown) formed at both ends of the peripheral wall of the rotary drum 2, whereby the drum door 3 is held slidably along the peripheral surface of the rotary drum 2. A drum lock opening 3b is formed in the drum door 3, and the door stopper 7 is movable by fitting the tail end of the door stopper 7 into the drum lock opening 3b.

As shown in FIGS. 3 and 4, an intermediate portion of a door stopper 7 is rotatably attached to one end of the drum door 3 by a shaft pin so as to be rotatable in the radial direction of the rotary drum 2, and is always rotated by a torsion spring 16 to a fourth position. It is biased counterclockwise in the figure. Further, the door stopper 7 has a claw portion 7a at the tip, and the claw portion 7a
When the drum door 3 fully closes the opening 2b of the rotary drum 2, it is locked by the hooking portion 2c formed on the peripheral wall of the rotary drum 2 so that the drum door 3 is not displaced to the rotary drum 2. Lock it. At this time, the spring 16 urges the claw portion 7a of the door stopper 7 in the direction in which the hook portion 2c of the rotary drum 2 is hooked. Further, a recess 7b with which the lock pin 12a of the door locking means 12 is engaged is formed at the tail end of the door stopper 7, and the lock pin 12a is pushed down while the lock pin 12a is engaged with this recess 7b. This causes the door stopper 7 to rotate in the direction in which the claw portion 7a is separated from the hooking portion 2c of the rotary drum 2 against the biasing force of the spring 16, and at the same time, the drum door 3 is engaged with the rotary drum 2. Hold in the unlocked state. Further, a receiving member 17 for confirming the lock of the door stopper is fixed to the drum door 3 so as to face each other in the rear direction of the recess 7b, and the receiving member 17 has the lock pin 12a of the door locking means 12 at an intermediate position. At this time, the lock pin 12a is locked.

In FIG. 4, a lock pin that constitutes the door lock means 12
The bearing 12a is fixed to the outer peripheral surface of the outer tub 18 so as to be slidable in the radial direction of the rotary drum 2. A rack 20 is formed along the longitudinal direction of the lock pin 12a on the projecting end side of the outer tub 18 and the pinion 21 is formed on the rack 20.
Are in mesh. The pinion 21 is fixed to an output shaft 22a of a lock pin drive motor 22 with a reduction gear. Also,
The lock pin drive motor 22 is supported on the outer tank 18 by a support member 23. The support member 23 is provided with detection switches 24, 25, 26 such as limit switches for detecting the forward end, the intermediate position and the backward end of the lock pin 12a, respectively. The ON operation is performed by detecting the switch actuator provided on the pin 12a.

In FIG. 4, the drum position detecting means 10 comprises a door opening / closing position sensor 10a fixed to the outer tub 18 and a door stopper position plug 10b attached to the drum pulley 2d. When the flag 10b faces the sensor 10a, A signal is output from the sensor 10a.

FIG. 5 is a configuration diagram showing a door opening / closing control section of a door opening / closing device for a rotary drum according to an embodiment of the present invention. That is, FIG. 5 shows the overall construction of the drum door opening / closing control section in this embodiment, which is composed of a microcomputer.

That is, the control unit 28 includes a CPU 28a that controls and manages the entire memory, input / output device, etc., and an outer tub 18 formed facing the rotary drum 2 (see FIG. 4) or the laundry inlet / outlet of the casing 1. A ROM 28b for storing a processing program for positioning in the opening and a processing program for automatically opening and closing the drum door 3, a RAM 28c for storing a calculation result in the CPU 28a and other data, an input interface 28d and an output interface 28e. These are provided and are connected to the CPU 28a via the bus 28f.

The input interface 28d includes a door opening / closing position sensor 10a,
Detection switches 24, 25, 26 for detecting the forward end, the intermediate position and the backward end of the lock pin 12a are connected, and the output interface 28e is a drum for controlling the drum drive motor 8, the lock pin drive motor 22, and the rotary drum 2. An alarm 29 for notifying that clothes are caught on the brake 14 and the drum opening 2b is connected.

In FIG. 5, the CPU 28a, the ROM 28b, the input interface 28d, and the output interface 28e constitute the motor control means 9, the position confirmation means 11, the door lock control means 13, and the brake control means 15 shown in FIG. is there.

Next, the operation of the embodiment configured as described above will be described based on the flowcharts of FIGS. 6 and 7.

FIG. 6 is a flowchart showing the procedure for opening the drum door in the rotary drum door opening / closing device according to an embodiment of the present invention, and FIGS. 7 (a) to 7 (c) are rotary drums according to the embodiment of the present invention. FIG. 8 is a flow chart showing the closing means of the drum door in the door opening / closing device of FIGS. 8A and 8B, and FIGS. 8A and 8B are explanatory views of the door closing operation in the rotary drum door opening / closing device according to an embodiment of the present invention. is there.

First, when the washing and drying of the laundry is completed and the control system of the washer / dryer is set to the automatic door opening mode, the sixth
The program for automatically opening the drum door shown in the figure starts. Along with this, the control unit 28 first gives a counterclockwise start command from the CPU 28a to the drum drive motor 8 through the output interface 28e to start the drum drive motor 8 and rotate the rotary drum 2 counterclockwise at a low speed. Let (Step S1). Then, in the next step S2, the sensor
The state of the detection signal from 10a is fetched into the CPU 28a, and it is determined in step S3 whether the rotary drum 2 has been rotated to the door open / close position, that is, the flag 10b has been rotated to a position facing the sensor 10b.
If "NO", the process returns to step S1 and steps S1 to S3 are repeated until the drum is rotated to the door opening / closing position.

If it is determined that the rotary drum 2 has reached the door opening / closing position, the process proceeds to step S4, the rotation of the drum drive motor 8 is stopped, and an operation command is issued to the drum brake 14 to brake the rotary drum 2. , The rotary drum 2 is locked (step S5). At this time, the recess 7b of the door stopper 7
Is placed at the door open / close position facing the lock pin 12a.

When the drum drive motor 8 stops, the process proceeds to step S6,
The CPU 28a issues a start command to the lock pin drive motor 22 to rotate the lock pin drive motor 22 and pinion the rack 20.
The lock pin 12a is moved forward by 21. Then, in the next step S7, the output state of the detection signal from the end detection switch 24 is fetched into the CPU 28a, and the lock pin 12a
Has reached the forward end position (step S8). Here, if it is determined that the lock pin 12a has reached the forward end position, the process proceeds to step S9 and the lock pin drive motor 22
To stop the forward movement of the lock pin 12a.

At this time, the tip of the lock pin 12a is recessed in the door stopper 7b.
, The concave portion 7b side is pushed down and the claw portion 7a side is raised so that the state shown by the solid line in FIG. 4 is obtained. As a result, the drum door 3 is unlocked from the rotary drum 2. The rotary drum 2 can be slid relative to the rotary drum 2. Then, the brake 14 for the rotary drum 2 is released (step S10).

When the brake applied to the rotating drum 2 is released, the process proceeds to step S11, the drive command is given to the drum driving motor 8 again to start the motor 8 counterclockwise, and the rotating drum 2 is slowly rotated counterclockwise. At this time, since the tip of the lock pin 12a is press-engaged with the door stopper 7, the drum door 3 is held in a fixed state. Therefore, as the rotary drum 2 is rotated counterclockwise, its opening
2b will be opened sequentially. As the rotary drum 2 is rotated counterclockwise, a door opening / closing position detection flag and another door opening completion position detection flag (not shown, the rotary drum 2
Of the detection signal from the door opening / closing position sensor 10a is fetched into the CPU 28a (step S12), and the rotary drum 2 is moved to the next step S13. Determine whether it is the door open completion position. When it is determined that the door opening completion position is reached, the process proceeds to step S14, the drum drive motor 8 is stopped, and the drum brake 14 is operated (step S15).
Lock the rotating drum in the door open position. As a result, it is possible to put the laundry or the dried product in and out of the rotary drum 2.

Next, the automatic closing operation of the drum door 3 will be described based on the flowchart of FIG. 7 and FIG.

When the washed and dried laundry is taken out from the rotary drum 2, a new laundry is put into the rotary drum 2, and a washing instruction is given by closing the outer lid or the like, the result is shown in FIG. The program starts. Accordingly, the control unit 28 firstly outputs the output interface 28e from the CPU 28a.
The release command is given to the drum brake 14 through
Release 14 (step S20). When the brake 14 is released, the process proceeds to step S21 and the CPU 28a gives a start command in the clockwise direction to the drum drive motor 8 through the output interface 28e. As a result, the drum drive motor 8 is activated to rotate the rotary drum 2 clockwise at a low speed.

When the rotary drum 2 is rotated clockwise, step S22
, The output state of the detection signal from the position sensor 10a is C
The data is taken into the PU 28a, and in the next step S23, it is determined whether the rotary drum 2 has been rotated until the door opening / closing position, that is, the flag 10b faces the sensor 10a. Here, if it is determined that the rotary drum 2 has been rotated to the door opening / closing position, step S2
In step 4, the drum drive motor 8 further rotates the rotary drum 2 for a predetermined time (about 1 second) in the clockwise direction to complete the closing of the opening 2b of the rotary drum 2 by the drum door 3. At that time, the flag 10b faces the left corner of the sensor 10a as shown in FIG. 8 (a).

Then, the process proceeds to step S25, the rotation of the drum drive motor 8 is stopped, and the drum brake 14 is operated to brake the rotating drum 2 (step S26). Then C
The PU 28a gives a start command to the lock pin drive motor 22 through the output interface 28e, and outputs the lock pin drive motor 22.
22 is driven to move the lock pin 12a in the backward direction from the state shown by the solid line in FIG. 8 (a). (Step S27).
Then, in the next step S28, the intermediate detection switch 2
The output state of the detection signal from 5 is taken into the CPU 28a, and it is determined whether the lock pin 12a has retracted to the intermediate position (step S29). Here, when it is determined that the lock pin 12a is fixed to the intermediate position, the process proceeds to step S30, the lock pin drive motor 22 is stopped, and the backward movement of the lock pin 12a is stopped.

When the lock pin 12a is retracted to the intermediate position, the pressing force on the door stopper 7 disappears, so that the door stopper 7 is brought into the state shown by the solid line in FIG. here,
If clothes are not sandwiched between the opening edge of the rotating drum 2 and the closed drum door 3, the claw portion 7a of the door stopper 7
Is completely locked to the hooking portion 2c of the rotary drum 2, but if clothes are caught, the claw portion 7a may be displaced from the hooking portion 2c or may be in an incompletely locked state. Become. The following operation is executed to confirm this.

That is, when it is detected that the lock pin 12a has retracted to the intermediate position, a release command is given to the drum brake 14,
The drum brake 14 is released (step S31). After that, a counterclockwise start command is given to the drum drive motor 8 to start the motor 8 and rotate the rotary drum 2 for a predetermined time (1
Rotate counterclockwise (~ 2 seconds) (step S32). When the rotary drum 2 is rotated counterclockwise, the receiving member 17 provided on the drum door 3 engages with the lock pin 12a as shown in FIG. 8 (b). At this time, if the claw portion 7a of the door stopper 7 is completely locked to the hooking portion 2c of the rotary drum 2, the counter member 12 is locked by the lock pin 12 when the rotary drum 2 rotates counterclockwise.
Stop when it engages a. Further, if the pawl portion 7a is not completely locked to the hook portion 2c, the rotation of the rotary drum 2 in the counterclockwise direction after the receiving member 17 is engaged with the lock pin 12a does not pass for a predetermined time. Will be continued until.

Therefore, in order to confirm whether or not the door stopper 7 is completely locked, in step S34, the output state of the sensor 10a is taken into the CPU 28a, and the rotary drum 2 after the drum brake 14 is actuated to the door open / close position. Determine if there is. (Step S35). If the door stopper position flag 10b is in a position facing the left corner of the sensor 10a as shown in FIG. 8 (a), the claw portion 7a of the door stopper 7 is the hooking portion of the rotary drum 2.
When it is determined that it is completely locked by 2c, the process proceeds to step S36. In step S36, the backward drive command is given to the lock pin drive motor 22 again to start the lock drive motor 22,
The lock pin 12a is further retracted. At the same time, the output state of the backward end detection switch 26 of the lock pin 12a is fetched into the CPU 28a (step S37), and it is determined whether the lock pin 12a has reached the backward end position (step S38). Here, if it is determined that the lock pin 12a has reached the retracted end position, the process proceeds to step S39, the lock pin drive motor 22 is stopped, and the retract of the lock pin 12a is stopped. And
In the next step S40, the drum brake 14 is released.

On the other hand, the claw portion 7a of the door stopper 7 is the hooking portion 2c of the rotary drum 2.
On the other hand, in the incompletely locked state, the rotary drum 2 is rotated in the counterclockwise direction even after the receiving member 17 is engaged with the lock pin 12a, so that the claw portion 7a as shown in FIG. 8 (b). Is a hook
When the door stopper position flag 10b is completely disengaged from 2c, the door stopper position flag 10b is largely displaced to the left of the position sensor 10a. As a result, in step S35, it is determined that the rotary drum 2 is not in the door opening / closing position, and at the same time, it is determined that the door stopper 7 is incompletely locked to the rotary drum 2, and the subroutine shown in FIG. Move to.

FIG. 7B shows a processing procedure for removing the clothes caught on the opening edge of the rotary drum 2.

First, in step S41, a counter (not shown) built in by the CPU 28a as software is set, and the rotary drum 2
Counts the number of rotations at which the clothes are removed. Next steps
In S42, it is determined whether or not the number of times of removing the clothes has reached a predetermined number (for example, about 5 times). Here, when it is determined that the number of times is equal to or less than the predetermined number of times, the process proceeds to step S43, and the lock pin drive motor 22 is given a start command in the forward direction to move the lock pin 12a forward. Along with this, the output state of the forward end detection switch 24 for the lock pin 12a is fetched into the CPU 28a (step S45), and it is determined whether the lock pin 12a has reached the forward end position (step S46). Here, when it is determined that the lock pin 12a has reached the forward end, the door stopper 7 is in the unlocked state shown by the solid line in FIG. After that, a release command is given to the drum brake 14 to release the brake of the rotary drum 2 (step S47). Then, in the next step S48, a start command is given to the drum drive motor 8, the rotary drum 2 is slowly rotated counterclockwise, and the door operation is performed again. At this time, a door opening completion position flag (not shown) provided separately on the drum pulley 2d is a position sensor.
Detects the door open completion position by facing 10a,
(Step S49) In the next step S50, it is determined whether the rotary drum 2 is at the door opening completion position. Here, when it is determined that the door opening completion position is reached, the process proceeds to step S51, the drum drive motor 8 is stopped, and the drum brake 14 is operated to fix the rotary drum 2 to the door opening position in step S52. This state is maintained for a predetermined time (1 to 2 seconds) (step S53). That is, by opening the door of the rotary drum 2, it waits for the clothes caught on the opening edge of the rotary drum 2 to be automatically removed from the opening edge. Then, the process returns to step S20, and the door closing operation is performed again.

Therefore, if the clothes caught on the drum opening 2b are removed by the door opening operation in the subroutine, the door closing of the rotary drum 2 can be completed by the second door closing operation.

On the other hand, in step S42 shown in FIG. 7 (b), when it is determined that the clothing removing operation by the door opening / closing operation of the rotating drum 2 has reached the predetermined number of times, it is shown in FIG. 7 (c). The process shifts to the subroutine, and the alarm 29 is sounded (step S54) to notify that the clothes are caught in the drum opening 2b or the like and cannot be removed. The operator who receives this notification can completely lock the door stopper 7 by removing the clothes from the drum opening or the like.

Therefore, in the present embodiment as described above, after detecting the door stopper position flag 10b, the door stopper locking confirmation receiving member 17 is engaged with the lock pin 12a at the lock confirmation position, and the drum door 3 is detected. If the position sensor 10a can detect the flag 10b after the predetermined time has passed, the rotary drum 2 is rotated in the door closing direction for a predetermined time while holding the rotary drum 2 so that it cannot be rotated. 2c is determined to be locked, and if it cannot be detected, it can be determined that the locking of the door stopper 7 is incomplete.
It is possible to prevent the problem of incomplete locking of the door closing, that is, the problem that the rotating drum 2 is rotated without the claw portion 7a of the door stopper 7 being completely locked by the hooking portion 2c of the rotating drum 2.
When the locking is incomplete, the drum door is once opened and the door closing operation is performed again so that the door closing can be confirmed. Therefore, the drum door can be automatically opened and closed without malfunction.

The door opening / closing device for the rotary drum according to this embodiment includes a casing 1
A rotary drum 2 which is rotated by a drum drive motor 8 inside
And a motor control means 9 for controlling the drum driving motor 8 to rotate the rotary drum 2 to a door opening / closing position and a door opening completion position.
A drum door 3 provided on the peripheral wall of the rotary drum 2 and slidably attached to the outer periphery of the rotary drum 2 for opening and closing the drum opening 2b of the rotary drum 2, and a drum door 3 provided on the drum door 3. A door stopper 7 that locks or unlocks the rotary drum 2, and a drum position detector 10 that detects the rotary drum 2, the door open / close position, and the door open completion position.
When the rotary drum 2 is moved to the door open / close position, the door stopper 7 unlocks the drum door 3, holds the drum door 3 in an immovable state with respect to the casing 1, and holds the door stopper. 7, a door lock means 12 for holding the drum door 3 closed when it is confirmed to be locked so as not to rotate in the door opening direction, and the door lock means 12 is controlled according to opening and closing of the drum door 3 and a door stopper. A door lock control means 13 for controlling the locking confirmation position 7 and a drum brake 14 for locking the rotary drum 2 at a door opening / closing position or a door opening completion position;
Drum brake control means 15 for controlling the drum brake 14
And confirming the door open / close position or the door open completion position of the rotary drum 2 based on the signal from the drum position detection means 10,
When the door lock state is confirmed, it is determined that the lock of the door stopper 7 is complete, and when the door lock state cannot be confirmed, the motor control means 9 and the drum brake until the door lock state can be confirmed. Position control means 11 is provided for controlling the control means 15 to repeatedly perform the door opening and closing operations of the rotary drum 2 a predetermined number of times.

In this embodiment, when the drum door of the rotary drum 2 is automatically closed, first, a start command is given from the motor control means 9 to the drum drive motor 8 to rotate the rotary drum 2 in the clockwise direction, and the position is accordingly moved. When the confirmation means 11 confirms the door open / closed position based on the signal from the drum position detection means 10, the rotary drum 2 is further rotated clockwise for a predetermined time, and then the rotary drum 2 is stopped. After that, an operation command is given to the door lock control means 13 to operate the door lock means 12,
The unlocking of the door stopper 7 is released, and the door stopper 7 shifts to the locking confirmation posture. Then, after rotating the rotary drum 2 counterclockwise for a predetermined time again, the position confirming means 11 confirms whether the rotary drum 2 is in the door open / close position,
When the door opening / closing position can be confirmed, it is determined that the door stopper 7 is completely locked, and the rotary drum 2 is moved to the next operation.
When the door opening / closing position cannot be confirmed because the laundry is caught in the drum opening 2b, it is determined that the lock of the door stopper 7 is incomplete, and the door lock means 12 is operated to operate the door stopper 7. The lock is released and the rotary drum 2 is rotated in the door opening direction, and when the position confirmation means confirms the door opening completion position at that time, the rotary drum 2 is stopped and the door closing operation is executed again. Then, until the lock of the door stopper 7 with respect to the rotating drum 2 can be confirmed, the lock of the door stopper 7 is confirmed by repeating the door opening and closing operations a predetermined number of times. Therefore, when the door is closed, a method of confirming the locked state of the door stopper 7 with respect to the rotating drum 2 is adopted. Therefore, the rotating drum 2 is washed or dried while the door stopper 7 of the drum door 3 is incompletely locked. It is possible to prevent the problem of being rotated due to.

Needless to say, the door opening / closing device for the rotary drum 2 in this embodiment is not limited to the structure shown in the above embodiment.

[Effects of the Invention] As described above, according to the present invention, when the door is closed by the rotation of the rotary drum, the door lock means locks the door stopper with respect to the rotary drum, and the drum door is rotated by the door lock means. Since the rotating drum is rotated in the door opening direction while holding it so that it cannot rotate integrally with the drum, it is possible to check whether the door stopper is securely locked to the rotating drum. There is an effect that incomplete locking can be prevented and the closing operation of the drum door can be reliably performed.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an overall configuration of a door opening / closing device for a rotary drum according to an embodiment of the present invention, and FIG. 2 is a drum door rotation according to a door opening / closing device for a rotary drum according to an embodiment of the present invention. FIG. 3 is an explanatory view showing a state of attachment to a drum, FIG. 3 is a perspective view of a drum door of a rotary drum door opening / closing device according to an embodiment of the present invention, and FIG. 4 is a rotary drum according to an embodiment of the present invention. FIG. 5 is a main configuration diagram of a door locking means related to the door opening / closing device of FIG. 5, FIG. 5 is a configuration diagram illustrating a door opening / closing control unit related to the door opening / closing device of the rotary drum according to an embodiment of the present invention, and FIG. FIG. 7 (a) is a flowchart showing a procedure for opening the drum door in the door opening / closing device for the rotary drum according to the embodiment.
FIG. 8 (c) is a flow chart showing the procedure for closing the drum door in the rotary drum door opening / closing device according to the embodiment of the present invention, and FIGS. 8 (a) and 8 (b) are the rotary drum according to the embodiment of the present invention. 9 is a schematic perspective view of a drum type washer / dryer for explaining the configuration of a conventional rotary drum. In the figure, 1: casing, 2: rotating drum, 3: drum door, 7: door stopper, 8: drum drive motor, 9: motor control means, 10: drum position detection means, 11: position confirmation means, 12: door Locking means,
12a: lock pin, 13: door lock control means, 14: drum brake, 15: drum brake control means, 17: receiving member. In the drawings, the same reference numerals and symbols indicate the same or corresponding constituent parts.

Claims (1)

[Claims] 1. A rotary drum that is rotated by a drum drive motor in a casing; motor control means that controls the drum drive motor to rotate the rotary drum to a door opening / closing position and a door opening completion position; A drum door provided on the peripheral wall of the rotary drum and slidably attached to the outer periphery of the rotary drum for opening and closing the drum opening of the rotary drum; and a drum door provided on the drum door, the drum door being relative to the rotary drum. A door stopper that is in a locked state or a unlocked state, a drum position detection unit that detects a door opening / closing position and a door opening completion position of the rotating drum, and the door when the rotating drum is moved to the door opening / closing position. The stopper unlocks the drum door, holds the drum door immovable with respect to the casing, and locks the stopper of the door. A door lock means for holding the drum door, which is sometimes closed, so as not to rotate in the door opening direction; and a door lock means for controlling the door lock means in accordance with opening and closing of the drum door, and at a lock confirmation position of the door stopper. Door lock control means for controlling, a drum brake for locking the rotating drum at a door opening / closing position or a door opening completion position, a brake control means for controlling the drum brake, and the rotation based on a signal from the drum position detecting means. Check the door open / close position or door open completion position of the drum,
When the door lock state is confirmed, it is determined that the lock of the door stopper is complete, and when the door lock state cannot be confirmed, the motor control means and the brake control means until the door lock state can be confirmed. And a position confirmation means for repeatedly performing the door opening and closing operations of the rotating drum a predetermined number of times by controlling the door opening and closing device of the rotating drum.