JPH07100105B2 - 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 is provided with an opening as a loading / unloading opening for laundry on its peripheral wall, and slidable on the drum peripheral wall for opening / closing this opening. It has a drum door provided.

FIG. 12 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.

An opening 5 is provided on the upper surface of the casing 1,
Further, an outer lid 6 for opening and closing the opening 5 is pivotally attached.

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

[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,
Or if you forget to close it, rotating the drum will cause the contents to pop out and damage the contents, damage the device,
It may damage other components.

Also, a method has been proposed in which the door opening / closing position of the rotating drum 2 is automatically detected and the drum door 3 is stopped at the laundry exit position. However, this method manually opens / closes the drum door 3. Therefore, when the rotary drum 2 is stopped at the door open / close position, the laundry or the dried product in the rotary drum 2 is moved by shock so that the drum door is rotated clockwise or counterclockwise to some extent. Although this does not hinder the opening / closing operation of the drum door, if the drum door is automatically opened / closed, the door open position must be set accurately.

The present invention has been made in view of the above points, and can accurately set the opening / closing position of the rotating drum door even when the laundry or the dry item is shockedly moved, and automatically opens / closes the drum door. An object of the present invention is to provide a rotary drum door opening / closing device that can be operated.

[Means for Solving the Problems] An opening / closing device for a rotary drum according to the present invention includes a rotary drum that is rotated by a drum drive motor in a casing, and the rotary drum is controlled by controlling the drum drive motor so that the rotary drum opens and closes the door. Motor control means rotated to a completion position, a drum door slidably attached to the outer periphery of the rotating drum that opens and closes a drum opening provided on the peripheral wall of the rotating drum, and the drum door, A door stopper that locks or unlocks the drum door with respect to the rotating drum, a drum position detection 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. A door that, when moved to the open / close position, unlocks the drum door by the door stopper and holds the drum door in an immovable state with respect to the casing. Lock means, door lock control means for controlling the door lock means according to opening and closing of the drum door, a drum brake for locking the rotary drum at a door open / close position and a door open completion position of the rotary drum, When the rotary drum is stopped at the door opening / closing position or the door opening completion position by stopping the drum driving motor and operating the drum brake, the position of the brake control means for controlling the drum brake is detected by the drum position detecting means. It is provided with a judgment processing means for judging whether or not it is correct, and when it is not correct, correcting the rotary drum to the correct door opening / closing position or door opening completion position by the motor control means or the brake control means.

[Operation] In the present invention, when the drum door is automatically opened,
First, a start command is given to the drum drive motor from the motor control means, thereby rotating the rotating drum counterclockwise. When the drum position detecting means detects the door opening / closing position, the judgment processing means judges this and gives a stop command to the motor control means to stop the drum drive motor, and at the same time gives an operation command to the brake control means to apply the drum brake. Close it and brake the rotating drum. After that, the output state from the drum position detection means is taken into the determination processing means, and it is determined whether or not the rotary drum is accurately stopped at the door opening / closing position. If it is determined by this determination that the rotating drum is stopped at the door opening / closing position, an operation command is given to the door lock control means to operate the door lock means, and the lock pin is moved forward to move one end of the door stopper. It presses and releases the lock on the rotating drum, and holds the drum door in a non-operating state. Then, the motor control means starts the motor to rotate the rotary drum clockwise, thereby opening the opening of the rotary drum. At this time, the output signal from the drum position detection means is taken into the determination processing means to determine whether the rotating drum has reached the door open completion position. When the door open completion position is reached, the drum drive motor is stopped and the brake is applied. . This means that the drum door of the rotary drum is fully opened.

On the other hand, in the case of automatically closing the fully opened drum door, the rotary drum is rotated clockwise with the drum brake released, and the door open / close position at that time is detected by the drum position detection means, and the determination processing means is used. When it is determined that the door is in the open / closed position, the drum drive motor stops and the drum brake operates. Then, the door lock control means operates the door lock means to retract the lock pin, lock the door stopper to the rotary drum, and lock the drum door to the rotary drum. This causes the drum door to close the drum opening of the rotary drum.

Therefore, the drum door can be automatically opened and closed, the position of the door stopper with respect to the door locking means can be accurately positioned, and it is possible to prevent the door opening operation at an incorrect position due to movement of laundry in the drum. .

[Embodiment] Each embodiment in the case where the door opening / closing device for a rotary drum of the present invention is applied to a drum type washer / dryer will be described in detail with reference to the drawings.

<First Embodiment> FIG. 1 is a conceptual diagram showing the overall configuration of a door opening / closing device for a rotary drum according to a first 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 is opened and closed by a drum door 3, and the drum door 3 is a drum. It is provided slidably in the circumferential direction.

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 control circuit 9 controls the rotational speed and rotational direction of the motor 8.

Further, 10 is a drum position detecting means for detecting a predetermined position in the rotating direction of the rotating drum 2, and is attached to, for example, a magnetic sensor or an optical sensor installed in an outer tank (not shown) and a pulley portion of the rotating drum. It is composed of a flag such as an iron piece, and the flag faces a sensor to detect a predetermined position in the rotating direction of the rotary drum 2 (a door opening / closing position and a door opening completion position), and an output signal thereof is input to the determination processing means 11. It is supposed to be done.

The determination processing means 11 determines whether or not the rotating drum 2 is at the door opening / closing position or the door opening completion position, and when the rotating drum 2 is stopped at the door opening / closing position, the position is determined by the drum position detecting means 10 Is detected again to determine whether the opening / closing position of the rotary drum door is correct, and when it is not correct, a position correction command for the rotary drum is output to the drum drive motor 8 and the drum brake 12.

The drum brake 12 serves to brake and lock the rotary drum 2 at the door open / close position and the door open completion position of the rotary drum 2, and the drum brake 12 is controlled by a signal from the determination processing means 11. It is controlled by an output signal from the brake control means 13.

Reference numeral 14 denotes a door locking means, which is arranged in the casing 1 near the outer periphery of the drum. The door lock means 14 unlocks the door stopper 7 when the rotary drum 2 is indexed to the door open / close position, holds the drum door 3 in a locked state, and releases these states. And is configured to be controlled by the door lock control means 15.

FIG. 2 is an explanatory view showing a state in which a drum door of a door opening / closing device for a rotary drum according to a first embodiment of the present invention is attached to the rotary drum, and FIG. 3 is a first embodiment of the present invention. The perspective view of the drum door which concerns on the door opening / closing apparatus of a certain rotary drum, 4th
FIG. 1 is a main configuration diagram of a door lock means relating to a door opening / closing device for a rotary drum according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a mounting state of the drum door 3 to the rotary drum 2. 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 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, and these sliding grooves 3a engage with ribs (not shown) formed at both ends of the peripheral wall of the rotary drum 2. The drum door 3 is held slidably along the peripheral surface of the rotary drum.

As shown in FIGS. 3 and 4, an intermediate portion of the door stopper 7 is rotatably attached to one end side of the drum door by a shaft pin so as to be rotatable in the radial direction of the rotary drum 2. Is urged counterclockwise. Also,
The door stopper 7 has a claw portion 7a at its tip, and this claw portion is locked to a hooking portion 2c formed on the peripheral wall of the rotary drum 2 when the drum door 3 fully closes the opening 2b of the rotary drum 2. Accordingly, the drum door 3 is locked to the rotary drum 2 so as not to be displaced. At this time, the spring 16 is the claw portion of the door stopper 7.
7a is urged in the direction in which it is hooked on the hook 2c of the rotary drum 2. Further, at the tail end of the door stopper 7, there is a door locking means.
A recess 7b with which the lock pin 14a of 14 is engaged is formed. By pushing down the lock pin 14a while the lock pin 14a is engaged with the recess 7b, the door stopper 7 is resisted against the urging force of the spring 16. And the claw 7a is the hook 2c of the rotary drum 2.
The drum door 3 is held in the unlocked state with respect to the rotary drum 2 at the same time when the drum door 3 is rotated in the direction of moving away from.

Further, in FIG. 4, the lock pin 14a constituting the door locking means 14 is supported by a bearing 18 fixed to the outer peripheral surface of the outer tub 17 so as to be slidable in the radial direction of the rotary drum 2. A rack 19 is formed along the longitudinal direction of the lock pin 41a at the protruding end side of the outer tub 17, and a pinion 20 is engaged with the rack 19. The pinion 20 is fixed to an output shaft 21a of a lock pin drive motor 21 with a reduction gear. Further, the lock pin drive motor 21 is mounted on the outer tank 17 by a supporting member.
Backed by 22. The support member 22 is provided with detection switches 23, 24 such as limit switches for detecting the forward end and the backward end of the lock pin 14a. Each detection switch 23, 24 is a switch actuator 25 provided on the lock pin 14a. It operates by detecting.

FIG. 5 is an explanatory view of a position sensor section relating to a door opening / closing device for a rotary drum which is a first embodiment of the present invention, and FIG. 6 is a door relating to a door opening / closing device for a rotary drum which is a first embodiment of the present invention. It is a block diagram which shows an opening / closing control part.

In FIG. 5, the positional relationship between the door opening / closing position detection (door stopper position detection) flag 10a, the position sensor 10b, the door stopper 7, and the lock pin 14a is shown.
The width b of the flag 4a for detecting the door stopper position is set to b ≦ a between the allowable width a for allowing the 4a to enter the recess of the door stopper 7, and the drum pulley 2d is set to the fixed position sensor 10b. When the fixed flags 10a face each other within the width b, the lock pin 14a is securely engaged in the recess 7b of the door stopper 7 and is in the correct position where the door can be opened.

Next, FIG. 6 shows the overall construction of the drum door opening / closing control section in this embodiment, which is constituted by a microcomputer.

That is, the control unit 26 controls the CPU 26a that controls and manages the memory and the input / output device as a whole, and the opening 2b of the rotary drum 2 to the outer lid 6 (see FIG. 4) for taking out the laundry of the casing 1 or the casing. ROM 26b for storing a processing program for positioning at the opening of the outer tank formed facing the opening 5 of No. 1 and a processing program for automatically opening and closing the drum door 3
And store the calculation result and other data in CPU26a
The RAM 26c is provided with an input interface 26d and an output interface 26e, which are connected to the CPU 26a via a bus 26f.

The input interface 26d has a drum position detecting means 10
And detection switches 23 and 24 for detecting the forward end and the backward end of the lock pin 14a are connected, and the output interface 26e is connected to the drum drive motor 8, the lock pin drive motor 21, and the drum brake 12 that brakes the rotary drum 2. Has been done.

In FIG. 6, the CPU 26a, the ROM 26b, the input interface 26d, and the output interface 26e constitute the motor control means 9, the judgment processing means 11, the brake control means 13, and the door lock 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. 7 and 8.

FIG. 7 is a flow chart showing an open state of the drum door in the rotary drum door opening / closing apparatus according to the first embodiment of the present invention, and FIG. 8 is also a rotary drum door opening / closing apparatus according to the first embodiment of the present invention. 6 is a flowchart showing a closing operation of the drum door in FIG.

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 automatic opening program for the drum door shown in the figure starts.
Along with this, the control unit 26 first gives a release command to the drum brake 12 from the CPU 26a through the output interface 26e to release the drum brake 12 (step S1). When the brake is released, the process proceeds to the next step S2, the counter command is given to the drum drive motor 8 to start the drum drive motor 8, and the rotary drum 2 is rotated counterclockwise at a low speed. Then, in the next step S3, the state of the detection signal from the drum position detecting means 10 is fetched into the CPU 26a, and it is determined in step S4 whether the rotary drum 2 has been rotated to the door opening / closing position. If "NO", return to step S2,
Repeat steps S2 to S4 until the drum is rotated to the door open / close position.

If it is determined that the rotary drum 2 has come to the door open / close position, the process proceeds to step S5, the rotation of the drum drive motor 8 is stopped, and an operation command is issued to the drum brake 12 to brake the rotary drum 2. , The rotary drum 2 is locked (step S6). After that, the process proceeds to step S7, the output state of the drum position detecting means 10 after the drum lock is taken into the CPU 26a through the input interface 26d, and it is determined again whether the rotary drum 2 is correctly stopped at the door open position (step S8). Here, after the drum driving motor 8 is stopped, the rotary drum 2 is shockedly moved in the rotary drum 2 during a short time (for example, 30 ms) in which the brake is completely applied to the rotary drum 2. Is rotated slightly clockwise or counterclockwise and the position of the flag 10a shown in FIG. 5 is displaced from the position sensor 10b to the left or right, it is determined that the rotary drum 2 is not at the door open / close position. Then, the process returns to step S1 and steps S1 to S8 are executed again.

By repeating the above steps S1 to S8, the drum is in the door opening / closing position, that is, the flag 10a faces the position sensor 10b within the width b as shown in FIG. 5, and the drum stops at the correct door opening / closing position. If it is determined that the lock pin drive motor 21 is rotated, the CPU 26a issues a drive command to the lock pin drive motor 21 to rotate the lock pin drive motor 21, and the rack 19 and the pinion 20 move the lock pin 14a forward. Then, in the next step S10, the output state of the detection signal from the forward end detection switch 23 is fetched into the CPU 26a, and it is determined whether or not the lock pin 14a has reached the forward end position (step S11). Here, when it is determined that the lock pin 14a has reached the forward end position, the process proceeds to step S12, the lock pin drive motor 21 is stopped, and the forward movement of the lock pin 14a is stopped.

At this time, the tip of the lock pin 14a is recessed in the door stopper 7.
By engaging with b, 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 brought into the unlocked state with respect to the rotary drum 2, and is in a state capable of relative sliding with respect to the rotary drum 2. Then, the drum brake 12 for the rotary drum 2 is released (step S13).

When the brake applied to the rotating drum 2 is released, the process proceeds to step S14, the start command is given to the drum driving motor 8 again to start the motor 8 in the counterclockwise direction, and the rotating drum 2 is slowly rotated in the counterclockwise direction. At this time, since the tip of the lock pin 14a is press-engaged with the door stopper 7, the drum door 3 is held in a fixed state with respect to the rotating drum 2, so that the rotating drum 2 is rotated counterclockwise. Accordingly, the openings 2b are sequentially opened. As the rotary drum 2 is rotated counterclockwise, a door opening / closing position detection piece and another door opening completion position detection piece (not shown, provided on the pulley of the rotary drum 2) are provided. The CPU 26a fetches the output state of the detection signal from the drum position detection means 10 by facing (step S15), and in the next step S16, it is determined whether the rotary drum 2 is at the door opening completion position. When it is determined that the door open position is reached, the process proceeds to step S17, the drum drive motor 8 is stopped, the drum brake 12 is operated (step S18), and the rotary drum is locked at 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.

When the laundry that has been washed and dried is taken out from the rotating drum 2, a new laundry is put into the rotating drum 2, and a washing command is given by closing the outer lid, the program shown in FIG. 8 starts. To do. Accordingly, the control unit 26
First, the CPU 26a gives a release command to the drum brake 12 through the output interface 26e, and the drum brake 12 is released.
Release 12 (step S20). When the drum brake 12 is released, the process proceeds to step S21, and the CPU 26a gives a clockwise start command to the drum drive motor 8 through the output interface 26e. 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
At, the output state of the detection signal from the drum position detecting means 10 is fetched into the CPU 26a, and it is determined in the next step S23 whether the rotary drum 2 has been rotated to the door opening / closing position. If it is determined that the rotary drum 2 has been rotated to the door open / close position, the process proceeds to step S24, and the drum drive motor 8
Causes the rotary drum 2 to rotate further clockwise for a predetermined time, whereby the opening of the rotary drum 2 by the drum door 3
Complete the closure of 2b. Then, proceed to step S25,
The rotation of the drum drive motor 8 is stopped. Then, the drum brake 12 is operated to hold the rotary drum 2 in the locked state (step S26).

When the opening 2b of the rotary drum 2 is completely closed by the drum door 3, the process proceeds to step S27 and the lock pin drive motor 2
A reverse start command is given to 1 to start the lock pin drive motor 21 and retract the lock pin 14a. At the same time, it is determined whether the lock pin 14a is operated by the backward end detection switch 24, the output state of the detection signal is fetched into the CPU 26a (step S28), and it is determined whether the lock pin 14a reaches the backward end position (step S29). . Here, if it is determined that the lock pin 14a has reached the backward end position, step S30
To stop the lock pin drive motor 21 and
14a is stopped and the drum brake 12 is released (step S31). As a result, the door stopper 7 is brought into the state shown by the broken line in FIG. 4 and is locked to the hooking portion 2c of the rotary drum 2, so that the rotary drum 2 can be rotationally driven to start the washing or drying process.

In this embodiment as described above, since the drum door of the rotary drum can be automatically opened and closed, the operator only has to open the outer lid of the main body at the stage when the washing or drying process is completed. You can load and unload laundry immediately without opening the door. Along with this, the workability is improved, and the risk of burns can be eliminated.

Also, when the door of the rotating drum is opened, the rotating drum is indexed to the door opening / closing position once and the door opening / closing position of the rotating drum is detected again after the braking operation. You can
It is possible to prevent the door opening operation at the wrong position.

<Second Embodiment> FIGS. 9 to 11 show a second embodiment of the door opening / closing device for the washing / drying rotary drum according to the present invention. The difference from the first embodiment is the door opening / closing position. It has become possible to correct excessive movement or excessive movement of the rotating drum with respect to the door opening / closing position due to movement of laundry or dry matter at the time of detection, by correspondingly rotating the rotating drum clockwise or counterclockwise. Where it is.

FIG. 9 is an explanatory view of a position sensor section relating to a door opening / closing device for a rotary drum which is a second embodiment of the present invention, and FIG. 10 is a door relating to a door opening / closing device for a rotary drum which is a second embodiment of the present invention. FIG. 11 (a) to FIG. 11 (c) are configuration diagrams of the opening / closing controller, and are flowcharts showing the door opening operation in the door opening / closing device for the rotary drum according to the second embodiment of the present invention.

For this reason, in this embodiment, as shown in FIG. 9, the door stopper 7 for the lock pin 14a of the door locking means 14 is provided.
Is located at a correct position, and the first and second position sensors 10b1 and 10b2 for detecting whether the position is too far or too far are separated from each other by a distance slightly smaller than the width 10b of the position detection flag 10a and arranged at a predetermined position. The other door opening / closing mechanisms are the same as in the case of FIG.

In FIG. 10, the control unit 30 is a CPU 30a that controls the whole.
And a processing program for positioning the opening 2b of the rotating drum 2 at the laundry inlet / outlet of the casing 1 and a processing program for automatically opening / closing the drum door 3 are stored.
The ROM 30b, the RAM 30c for storing the calculation result in the CPU 30a and other data, the input interface 30d and the output interface 30e, which are CP via the bus 30f.
It is connected to U30a.

The input interface 30d includes a drum position sensor 10b1,
10b2 and the detection switches 23 and 24 for detecting the forward end and the backward end of the lock pin 14a are connected, and the output interface 3
A drum drive motor 8, a lock pin drive motor 21, and a drum brake 12 that controls the rotary drum 2 are connected to 0e.

In FIG. 10, the CPU 30a, the ROM 30b, the input interface 30d, and the output interface 30e constitute the motor control means 9, the judgment processing means 11, the brake control means 13, and the door lock control means 15 shown in FIG. is there.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG.

When the control system of the washer / dryer is set to the automatic door opening mode, the drum door automatic opening program shown in FIG. 11 (a) starts. As a result, first, the CPU 30a gives a release command to the drum brake 12 through the output interface 30e to release the drum brake 12 (step S40). When the brake is released, the process proceeds to the next step S41, the counter command is given to the drum drive motor 8 to start the drum drive motor 8, and the rotary drum 2 is slowly rotated in the counterclockwise direction at a low speed. . And CPU30a
When wanting to see the output state of the position sensor 10b1, the door open / close position is detected (step S42). In the next step S43,
Determine if the rotating drum is in the door open / close position. here,
When the flag 10a faces the first position sensor 10b1, an ON signal is sent from the position sensor 10b1.
It is determined that the rotary drum 2 is at the door opening / closing position by recognizing the above. Then, in step S44, the rotation of the drum drive motor 8 is stopped and the drum brake 12
To the rotary drum 2 to lock the rotary drum 2 (step S45). Next, in step S46, the first position sensor 1 after the drum is locked.
The output state of 0b1 is taken into the CPU 30a, the door open / close position is detected again, and based on this, in the next step S47,
It is again determined whether the rotary drum 2 is properly stopped at the door opening / closing position.

Here, while the drum driving motor 8 is stopped and the brake is applied to the rotating drum 2, the rotating drum 2 is rotated clockwise or counterclockwise due to the shocking movement of the laundry or dried product in the rotating drum 2. And this causes flag 10a
If is out of the position sensor 10b1, it is determined that the rotary drum 2 is not at the door open / close position, and the process proceeds to the processing routine shown in FIG. 11 (b). When the CPU 30a recognizes that the ON signal is sent from the position sensor 10b1 because the flag 10a faces the position sensor 10b1, the rotary drum 2 is at the door opening / closing position and the door stopper is in position. 7 recess 7b
Is determined to be in the correct position facing the lock pin 14a as shown in FIG. 9, and the process proceeds to step S48.

In step S48, the lock pin 14a is moved forward as in the case of the first embodiment, the forward position of the lock pin 14a is detected (step S49), and the lock pin 14 is further moved in step S50.
Determine whether a has reached the forward end position. When it is determined that the lock pin 14a has reached the forward end, the forward movement of the lock pin is stopped (step S51). At this time,
The tip of the lock pin 14a engages with the recess 7b of the door stopper 7 and pushes down on the recess 7b side, and the entire door stopper 7 is rotated clockwise in FIG. It is disengaged from the hook portion 2c, and the rotary drum 2 of the drum door 3 is unlocked. Then, in step S52, the brake of the drum is released, the start command is given again to the drum drive motor 8 to start the motor 8 counterclockwise, and the rotary drum 2 is slowly rotated counterclockwise (step S5).
3). When the rotary drum 2 is rotated counterclockwise, the opening 2b of the rotary drum 2 is sequentially opened because the drum door 3 is locked by the lock pin 14a. As the rotating drum 2 rotates counterclockwise, the drum pulley
The position flag 31 (see FIG. 9) separately provided in 2d faces the position sensor 10b1 to detect the door opening completion position (step S54). Then, in the next step S35,
It is determined whether the rotary drum 2 is at the door open completion position. That is, it is determined whether the ON signal of the position sensor 10b1 caused by the position flag 31 facing the position sensor 10b1 is recognized by the CPU 30a. If it is determined that the door opening completion position is reached, the process proceeds to step S56, the drum drive motor 8 is stopped, and the drum brake 12 is operated in step S57 to fix the rotary drum 2 to the door opening position. As a result, it is possible to put the laundry or the dry matter in and out of the rotary drum 2.

On the other hand, when it is determined in step S47 that the rotary drum 2 is not in the door open / close position, the process proceeds to the processing routine shown in FIG. 11 (b). In this processing routine, first, CP
The U30a is set to the detection mode capable of detecting the output state of the position sensor 10b2 (step S59). Then, in the next step S60, it is determined whether the rotary drum 2 has returned too much due to the shocking movement of the laundry or the dried product, that is, whether the flag 10a faces the second position sensor 10b2 and the ON signal is output. To do. Here, when it is determined that the rotary drum 2 has returned too much, the process proceeds to step S61, and the drum brake 12
Is released, and in the next step S62, a start command is given to the drum drive motor 8, which is started in the counterclockwise direction to slowly rotate the rotary drum 2 in the counterclockwise direction. Then, in the next step S63, the mode in which the output state of the position sensor 10b1 can be detected is set, and the output state is taken into the CPU 30a to determine whether or not the rotary drum 2 has reached the door opening / closing position, depending on the presence or absence of the ON signal of the position sensor 10b1. Judge (step S64),
Correct the excessive return of the rotary drum 2 to the correct position. If it is determined that the rotary drum 2 is at the door opening / closing position, the process returns to step S44.

In step S60, the rotary drum 2 is not returned too much, that is, the signal from the second position sensor 10b2 is OF.
When it is F (the first position sensor 10b1 is also OFF), it is determined that the rotary drum 2 has passed due to the shocking movement of the laundry or the dried material, and the processing routine shown in FIG. 11 (c) is entered. In this processing routine, first, the drum brake 12 is released in step S65, and in the next step S66, a start command is given to the drum drive motor 8, which is started in the clockwise direction to slowly rotate the rotary drum 2 in the clockwise direction. Let Then, in the next step S67, the door open / close position is detected by the position sensor 10b1, the output state thereof is taken into the CPU 30a, and it is determined whether the rotary drum 2 has reached the door open / close position by the ON signal of the position sensor 10b1 ( In step S68), overshoot of the rotary drum 2 is corrected to a correct position. here,
When it is determined that the rotating drum 2 is at the door opening / closing position,
Returning to step S44, the processing of step S44 and subsequent steps is executed.

Since the door closing operation in the second embodiment is the same as that in the first embodiment, its description is omitted.

Therefore, in the present embodiment as described above, by providing the position sensors 10b1 and 10b2, it is possible to prevent an excessive return or overshoot from the door opening / closing position of the rotary drum 2 due to a shocking movement of the laundry or the dry matter. The position can be immediately corrected to the correct position, and the correction time can be shortened as compared with the method of positioning again from the beginning as in the first embodiment.

The door opening / closing device for a rotary drum according to this embodiment is configured so that the drum driving motor 8 rotates the rotary drum 2 in the casing 1, and the drum driving motor 8 is controlled to move the rotary drum 2 to a door opening / closing position and a door opening completion position. Motor control means 9 for rotating the rotating drum 2 to a drum opening portion provided on the peripheral wall of the rotating drum 2.
A drum door 3 slidably attached to the outer circumference of the rotary drum 2 for opening and closing 2b, and a door stopper provided on the drum door 3 for locking or unlocking the drum door 3 with respect to the rotary drum 2. 7, a drum position detecting means 10 for detecting a door opening / closing position and a door completion position of the rotary drum 2, and the rotary drum 2
Is moved to the door open / close position, the door stopper 7 unlocks the drum door 3 and holds the drum door 3 in an immovable state with respect to the casing 1.
A door lock control means 15 for controlling the door lock means 14 in accordance with opening / closing of the drum door 3, a drum brake 12 for locking the rotary drum 2 at the door open / close position and the door open completion position of the rotary drum 2, and a drum When the rotating drum 2 is stopped at the door open / close position or the door open completion position by stopping the drum drive motor 8 and the operation of the drum brake 12, the position of the drum control means 13 for controlling the brake 12 is detected. It is determined whether or not it is correct, and when it is not correct, the motor control means 9 or the brake control means 13 corrects the rotary drum 2 to the correct door open / close position or door open completion position.

In this embodiment, when the drum door 3 is automatically opened, first, the motor control means 9 gives a start command to the drum drive motor 8 to rotate the rotary drum 2 counterclockwise. When the drum position detecting means 10 detects the door opening / closing position, the judgment processing means 11 judges this and gives a stop command to the motor control means 9 to stop the drum drive motor 8 and an operation command to the brake control means 13. Then, the drum brake 12 is closed and the rotating drum 2 is braked. After that, the output state from the drum position detection means 10 is addressed to the determination processing means 11 to determine whether or not the rotary drum 2 has been accurately stopped at the door opening / closing position. When it is determined by this determination that the rotary drum 2 is stopped at the door opening / closing position, an operation command is given to the door lock control means 15 to operate the door lock means 14, and the lock pin 14a is advanced to move the door. One end of the stopper 7 is pressed to unlock the rotary drum 2 and hold the drum layer 3 in a non-operating state. After that, the motor control means 9 starts the motor to rotate the rotary drum 2 clockwise, thereby opening the opening of the rotary drum 2. At this time, the output signal from the drum position detection means is taken into the determination processing means to determine whether the rotary drum 2 has reached the door open completion position. When the door open completion position is reached, the drum drive motor 8 is stopped and the brake is applied. multiply. As a result, the drum door 3 of the rotary drum 2 is fully opened.

On the other hand, when automatically closing the fully opened drum door 3,
When the rotary drum 2 is rotated clockwise with the drum brake 12 released, the door open / close position at that time is detected by the drum position detection means 10, and the determination processing means 11 determines that the door open / close position is set. The drum drive motor 8 stops and the drum brake 12 operates. Then, the door lock control means 15 operates the door lock means 14 to operate the lock pin 14
a is retracted, the door stopper 7 is locked to the rotary drum 2, and the drum door 3 is locked to the rotary drum 2. As a result, the drum door 3 closes the drum opening 2b of the rotary drum 2.

Therefore, the drum door 3 can be automatically opened and closed, the position of the door stopper 7 with respect to the door locking means 14 can be accurately positioned, and the door opening operation can be performed at an incorrect position due to movement of laundry in the drum. Can be prevented.

As described above, according to the door opening / closing device for a rotary drum of the present invention, when the rotary drum is positioned at the door open / close position when the drum door is opened / closed, the door of the rotary drum once positioned is positioned. The open / closed position is detected again to determine whether the rotary drum is correctly positioned at the door open / closed position, and when it is not correctly positioned, the position is automatically corrected. Even if the object or dried product is moved by shock and the rotating drum is displaced from the door opening / closing position, this can be automatically corrected, and the position of the door stopper with respect to the door locking means will be accurate, and It is possible to prevent the door opening operation at the open position, and to open and close the drum door automatically.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing the overall construction of a rotary drum door opening / closing device according to a first embodiment of the present invention, and FIG. 2 is a drum door relating to a rotary drum door opening / closing device according to a first embodiment of the present invention. Is a perspective view of the drum door of the rotary drum door opening / closing device according to the first embodiment of the present invention, and FIG. 4 is a first embodiment of the present invention. FIG. 5 is a main configuration diagram of a door locking means relating to the door opening / closing device of the rotating drum, FIG. 5 is an explanatory view of a position sensor section relating to the door opening / closing device of the rotating drum which is the first embodiment of the present invention, and FIG. The block diagram which shows the door opening / closing control part which concerns on the door opening / closing apparatus of the rotating drum which is 1st Example of this invention, FIG. 7 is the opening of the drum door in the door opening / closing apparatus of the rotating drum which is 1st Example of this invention. FIG. 8 is a flowchart showing the state, and FIG. 8 is also the first embodiment of the present invention. FIG. 9 is a flow chart showing a closing operation of a drum door in a door opening / closing device for a rotary drum, FIG. 9 is an explanatory view of a position sensor section of a door opening / closing device for a rotary drum according to a second embodiment of the present invention, and FIG. 11 is a block diagram of a door opening / closing control unit relating to a door opening / closing device for a rotary drum according to a second embodiment of the invention, and FIGS. 11A to 11C are door opening / closing devices for a rotary drum according to a second embodiment of the present invention. FIG. 12 is a flowchart showing the door opening operation in FIG. 12, and FIG. 12 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, 10a: flag, 10b, 10b1, 10b2 : Position sensor, 11: determination processing means, 12: drum brake, 13: brake control means, 14: door lock means, 14a: lock pin, 15: door lock control means, 26, 30: door opening / closing control section. In the drawings, the same reference numerals and symbols as those used in the drawings indicate the same or corresponding components.

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, and the rotary drum. A drum door slidably mounted on the outer periphery of the rotary drum for opening and closing a drum opening provided on the peripheral wall of the drum; and a state in which the drum door is provided in a locked state or engaged with the rotary drum. A door stopper that is in a stop release state, a drum position detection unit that detects a door opening / closing position and a door opening completion position of the rotating drum, and a drum door that is moved by the door stopper when the rotating drum is moved to the door opening / closing position. While releasing the lock,
Door lock means for holding the drum door in an immovable state with respect to the casing, door lock control means for controlling the door lock means according to opening / closing of the drum door, door opening / closing position of the rotating drum, and door opening. At the completion position, a drum brake that locks the rotating drum, a brake control unit that controls the drum brake, and the rotating drum causes the rotating drum to open or close the door or complete the door opening position by stopping the drum drive motor and operating the drum brake. When it is stopped, it is judged by the drum position detection means whether or not the position is correct, and when it is not correct, the motor control means or the brake control means corrects the rotary drum to the correct door opening / closing position or door opening completion position. A door opening / closing device for a rotary drum, comprising: