JPH07100104B2 - 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. 16 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 mounted on the shaft.

Therefore, in such a drum type washer / dryer, when the laundry or 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 move the position of 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 of the laundry or dried material 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,
Alternatively, if the user forgets to close the drum, rotating the drum may cause the contents to pop out, damaging the contents, and damaging the device and other components.

Further, in the rotary drum used in the drum type washer / dryer as shown in FIG. 16, after the outer lid 6 is opened, the rotary drum 2 is manually operated until the drum door 3 reaches the upper position.
Not only is the cumbersome door opening and closing work that is required to open the drum door 3 by rotating the hook to release the hooking tool 4, but the drum surface is hot at the end of the drying process, There is a problem that there is a risk of getting burned when opening and closing the door.

Therefore, the present invention has been made to solve the above problems, and provides a door opening / closing device for a rotary drum, which is capable of automatically positioning the opening of the rotary drum and opening / closing the drum door. With the goal.

[Means for Solving the Problem] An opening / closing device for a rotary drum according to the present invention opens / closes a rotary drum that is rotationally operated by a drum driving means in a casing, and a drum opening provided on a peripheral wall of the rotary drum. Therefore, a drum door slidably attached to the outer periphery of the rotary drum, a door stopper provided on the drum door for locking or unlocking the drum door with respect to the rotary drum, and the rotary drum Drum position detection means for detecting a predetermined position in the rotation direction, and a drum stopper provided near the outer periphery of the drum of the casing, and when the rotary drum is in the door open / close position, the door stopper is used to unlock the drum door. Door lock means for holding the drum door in an immovable state with respect to the casing, and rotating the rotating drum at a position where the opening of the rotating drum is fully opened. The drum lock means for locking and closing the drum door, and controlling the door lock means when opening and closing the drum door. Control means for controlling the drum drive means and for controlling the drum lock means so as to provide an opening / closing rotation operation of a predetermined angle in the direction or the reverse direction.

[Operation] According to this configuration, the control unit controls the drum driving unit to rotate the rotary drum to a predetermined position (door opening / closing position) for opening / closing the door, and the door provided on the drum door by the door locking unit. By operating the stopper, the door stopper is unlocked so that only the rotary drum is rotatable. In this state, the control means controls the drum drive means including the drive motor to rotate the rotary drum in the forward or reverse direction by a predetermined angle to open or close the drum opening provided on the peripheral wall of the rotary drum. That is, the drum door is fixed and only the rotary drum is rotated to open and close the drum opening. Further, after the opening operation of the drum door is performed by rotating the rotating drum in the forward direction or the reverse direction by a predetermined angle, the rotating drum can be made immovable with respect to the casing by the drum locking means. Therefore, the drum door can be automatically opened and closed without requiring human labor.

[Embodiment] Each embodiment in which the door opening / closing device for a rotary drum of the present invention is applied to a dryer will be described in detail below.

<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.

A rotary drum 2 is rotatably supported in a casing 1, and a drum door 3 capable of covering an opening 2b provided on the peripheral wall of the rotary drum 2 is provided slidably in the circumferential direction of the drum. Has been.

The drum door 3 is provided with a door stopper 7 for locking the drum door 3 to the rotating drum 2 in a closed state. A rotary drive of the rotary drum 2 is performed by a motor 8. The control circuit 9 controls the rotational speed and the rotational direction of the motor 8.

Further, 10 is a drum position detector for detecting a predetermined position in the rotating direction of the rotating drum 2, for example, an outer tank (not shown).
A magnetic sensor is installed in the rotary drum 2 and an iron piece is attached to the pulley portion of the rotary drum 2 to detect a predetermined value in the rotating direction of the rotary drum 2. 11 is a door locking means,
It is arranged in the casing 1 near the outer circumference of the drum. The door lock means 11 performs an operation of bringing the door stopper 7 into the unlocked state when the rotary drum 2 is in the door opening / closing position and a first operation of making the drum door 3 inoperative, and further, When the opening operation is performed, the rotary drum 2
The second operation is performed to make the non-movable state.

FIG. 2 is an explanatory view showing a mounting state of the drum door 3 of the door opening / closing device for the rotary drum according to the first embodiment of the present invention 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 of the rotary drum door opening / closing device according to the first embodiment of the present invention.

Sliding grooves 3a are provided on both sides of the drum door 3, and these sliding grooves 3a engage with ribs (not shown) formed at both ends of the peripheral wall of the rotary drum 2. As a result, the drum door 3 is held slidably along the peripheral surface of the rotary drum 2.

As shown in FIGS. 3 and 4, an intermediate portion of a door stopper 7 is rotatably attached to one end side of the drum door 3 by a shaft pin so as to be rotatable in the radial direction of the rotating drum 2, and is always rotated by a torsion spring 22. It is biased counterclockwise in FIG. 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 22 urges the claw portion 7a of the door stopper 7 in the direction in which the hook portion 2a of the rotary drum 2 is hooked. Further, the tail end of the door stopper 7 is a recess 7b with which a lock pin 12 of a door lock means 11 described later is engaged.
Is formed, and when the lock pin 12 is pushed down while the lock pin 12 is engaged with the recess 7b, the pawl portion 7a resists the biasing force of the spring and causes the pawl portion 7a to engage 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 as the drum door 3 is rotated in a direction away from 2c.

Further, a drum lock opening 3b is provided below the recess 7b of the door stopper 7 of the drum door 3. The drum lock opening 3b pushes the door stopper 7 further downward from the position where the door stopper 7 is in the unlocked state by the lock pin 12 of the door locking means 11, so that the tail end of the door stopper 7 is located below the drum door 3. It is possible to project it toward the rotary drum 2 side.

FIG. 4 is a main block diagram of the door lock means 11 of the door opening / closing device for the rotary drum according to the first embodiment of the present invention.

In the figure, the lock pin 12 includes a lower bearing 13 and an upper bearing.
It is supported by 14 so as to be slidable in the radial direction of the rotary drum 2.

A motor 15 is a drive source for moving the lock pin 12 in the front-rear direction (radial direction of the rotary drum 2), and a pulley 16 is attached to its rotary shaft 15a. This pulley 1
A wire 17 is wound around the outer periphery of the wire 6, and both ends of the wire 17 are fixed to predetermined positions above and below the lock pin 12.
Therefore, the lock pin 12 can be moved in the front-rear direction by the forward and reverse rotations of the pulley 16.

Further, in the longitudinal direction of the lock pin 12, a forward end detection switch 18, an intermediate detection switch 19 and a backward end detection switch 20 for detecting the front, rear end and intermediate position thereof are arranged. When the switch actuator 21 attached to the control circuit 9 opposes the detection switches 18 to 20, the control circuit 9 outputs a switch signal, for example, an ON signal, which is opposite to that when the actuator 21 is not opposed to the detection switches 18 to 20.
I am trying to output to. The position of the lock pin 12 shown by the broken line in the figure is the retracted end position X, and the position of the lock pin 12 shown by the solid line is the intermediate position Y. The door lock means 11 is
As a first operation, the lowering operation of the lock pin 12 from the backward end position X to the intermediate position Y is performed.

When the lock pin 12 moves toward the rotary drum and pushes down the recess 7b at the tail end of the door stopper 7 described above to the tip of the lock pin 12, the claw portion 7a of the door stopper 7 causes the hook 2c of the rotary drum 2 to engage. Move away from.

FIG. 5 further lowers the lock pin 12 of the door opening / closing device of the rotary drum according to the first embodiment of the present invention from the intermediate position Y,
The figure of the state moved to the forward end position Z is shown. The door lock means 11 performs the lowering operation from the intermediate position Y of the lock pin 12 to the forward end position Z as the second operation.

By this descending operation to the forward end position Z, the lock pin
Reference numeral 12 pushes down the concave portion 7b of the door stopper 7 so that the concave portion 7b which is the tail end portion of the door stopper 7 is projected from the drum lock opening 3b. The protruding recess 7b engages with a small hole 2d provided in the vicinity of the opening 2b of the rotary drum 2 located below the drum door 3. As a result, the rotary drum 2 is in a state in which it cannot rotate.

Further, when the lock pin 12 moves backward and moves toward the backward end position, the door stopper 7 is returned to the normal state position shown by the broken line in the figure by the urging force of the spring 22. In the case of the casing 1 or the drum type washing machine, the main components of the door lock means 11 are attached to the outer tub portion via packing or the like.

FIG. 6 is a block diagram showing an example of the internal configuration of the control circuit 9 of the door opening / closing device for a rotary drum according to the first embodiment of the present invention, which is composed of a microcomputer.

That is, the control circuit 9 controls the CPU 9a that controls and manages the memory and the input / output device as a whole and the opening 2b of the rotary drum 2 by the outer lid 6 (see FIG. 9) for taking out the laundry of the casing 1 or the casing 1. ROM 9b for storing a processing program for positioning in the opening of the outer tub formed opposite to the opening 5 and a processing program for automatically opening and closing the drum door 3
And RAM for storing calculation results and other data in CPU9a
9c, an input interface 9d and an output interface 9e, which are connected to the CPU 9a via a bus 9f.

A drum position detector 10 and detection switches 18, 19, 20 are connected to the input interface 9d, and a drum drive motor 8 and a lock pin drive motor 15 are connected to the output interface 9e.

Next, the operation of this embodiment configured as described above will be described based on the flowcharts of FIGS. 7 and 8 and the operation diagrams of FIGS. 9 and 10.

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 a drum in the rotary drum door opening / closing apparatus according to the first embodiment of the present invention. 9 is a flow chart showing the closing operation of the door, and FIGS. 9A, 9B, 9C and 9D are portions showing respective stages of the opening operation of the drum door in the door opening / closing device for the rotary drum according to the first embodiment of the present invention. It is a schematic diagram.

7 and 8 are flowcharts of the door opening / closing device for the rotary drum according to the first embodiment of the present invention, showing the automatic opening operation of the drum door 3, and FIG. 9A, FIG. 9B, and FIG. 9C and 9D are partial schematic views of the drum type washer / dryer showing the respective operation steps of the drum door opening operation of the rotary drum door opening / closing apparatus according to the first embodiment of the present invention.

First, when the washing and drying of the laundry is finished and the system of the washer / dryer is set to the automatic door opening mode, the program shown in FIG. 7 starts. Along with this, the control circuit 9
First, the CPU 9a gives a counterclockwise start command to the drum drive motor 8 through the output interface 9e, thereby starting the drum drive motor 8 to rotate the rotary drum 2 counterclockwise at a low speed (step S
1). Then, in the next step S2, the output state of the detection signal from the drum position detector 10 is loaded into the CPU 9a,
In step S3, it is determined whether the rotary drum 2 has been rotated to the door open / close position. If "NO", the process returns to step S1, and steps S1 to S3 are repeated until the drum 2 is rotated to the door opening / closing position.

If it is determined that the rotary drum 2 has reached the door open / close position, the process proceeds to step S4, and the rotation of the drum drive motor 8 is stopped. FIG. 9A shows a state in which the rotary drum 2 is stopped at this door opening / closing position.

When the drum drive motor 8 is stopped, the process proceeds to the next step S5, in which the CPU 9a issues a start command to the lock pin drive motor 15 to rotate the drive motor 15, and the lock pin 12 connected via the pulley 16 and the wire 17 is removed. Move forward. Then, in the next step S6, the output state of the detection signal from the intermediate detection switch 19 is fetched into the CPU 9a, and the lock pin 1
It is determined whether 2 has reached the intermediate position (step S7). Here, when it is determined that the lock pin 12 has been advanced to the intermediate position Y, the process proceeds to step S8, the pin drive motor 15 is stopped, and the advance of the lock pin 12 is stopped.

FIG. 9B shows a state in which the lock pin 12 has advanced to the intermediate position Y. At this time, the recess 7b at the tail end of the door stopper 7 is pushed down by the tip of the lock pin 12, and the claw 7a is lifted upward. This allows the drum door 3
Is unlocked with respect to the rotary drum 2, and is in a state capable of relative sliding movement with respect to the rotary drum 2.

When the pin drive motor 15 is stopped, the process proceeds to step S9, in which the drum drive motor 8 is again given a start command in the counterclockwise direction to start the motor 8, and the rotary drum 2 is slowly rotated in the counterclockwise direction. At this time, the lock pin 12 is attached to the door stopper 7.
Since the drum layer 3 is held in a fixed state with respect to the rotary drum 2 by the pressing engagement of the tip of the rotary drum 2, the opening 2b of the rotary drum 2 is rotated as the rotary drum 2 is rotated counterclockwise.
Will be released one after another. 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 as a drum position detector 10. By opposing each other, the output state of the detection signal from the position detector 10
It is taken into the CPU 9a (step S10), and in the next step S11, it is determined whether the drum 2 is at the door opening completion position. When it is determined that the door opening completion position is reached, the process proceeds to step S12, and the drum drive motor 8 is stopped.

FIG. 9C shows a state in which the opening 2b of the rotary drum 2 is rotated counterclockwise by a predetermined angle facing the opening of the casing 1. As is apparent from the figure, the opening 2b provided in the peripheral wall of the rotary drum 2 moves to the left in the figure from the position covered by the drum door 3 and is not covered by the drum door 3, and the opening 2b is opened. It is open. This series of operations completes the automatic opening operation of the rotary drum 2.

Next, the second operation for making the rotary drum 2 inoperative is started.

First, a start command is given to the pin drive motor 15, and this is started to further advance the lock pin 12 from the intermediate position Y (step S13). Then, in the next step S14, the output state of the detection signal from the forward end detection switch 18 is fetched into the CPU 9a, and it is determined whether or not the lock pin 12 has reached the forward end position Z (step S15). If it is determined that the lock pin 12 has reached the forward end, the process proceeds to step S16 to stop the forward movement of the lock pin 12.

FIG. 9D shows a state in which the lock pin 12 is at the forward end position Z, and at this time, the concave portion 7b which is the tail end portion of the door stopper 7 includes the drum lock opening 3b of the drum door 3 and the rotary drum. It is in a state of protruding from the small hole 2d of 2 to the inside of the rotary drum 2. By the engagement of the tail end portion with the small hole 2d of the rotary drum, the rotary drum 2 is held in a locked state in which it cannot rotate in either forward or reverse directions. This allows the laundry to be taken in and out of the rotary drum 2.

Next, the automatic closing operation of the drum door 3 will be described with reference to the flowchart of FIG. 8 to FIG.

FIGS. 10A, 10B and 10C are partial schematic views showing the operation of each stage of the closing operation of the drum door according to the door opening / closing device of the rotary drum of the first embodiment of the present invention.

When the laundry that has been washed and dried is taken out from the rotary drum 2, a new laundry is put into the rotary drum 2, and a washing command is given by the closing operation of the outer lid, the program shown in FIG. 8 starts. To do. Along with this, the control circuit 9
First, the CPU 9a gives a start command to the pin drive motor 15 through the output interface 9e, thereby starting the pin drive motor 15 and moving the lock pin 12 from the state of FIG. 9D in the backward direction (step S20). Then, in the next step S21, the output state of the detection signal from the intermediate detection switch 19 is fetched into the CPU 9a, and it is determined whether or not the lock pin 12 has retracted to the intermediate position (step S22). Here, when it is determined that the lock pin 12 has been retracted to the intermediate position Y, the routine proceeds to step 23, where the pin drive motor 15 is stopped and the retraction of the lock pin 12 is stopped.

When the lock pin 12 is retracted to the intermediate position Y, the lock of the rotary drum 2 by the door stopper 7 is released, and the program proceeds to step S24. In this step S24, CP
A start command in the clockwise direction is given to the drum drive motor 8 from the U9a through the output interface 9e. As a result, the drum drive motor 8 is activated to rotate the rotary drum 2 clockwise at a low speed. At this time, the drum door 3 is in a state in which the claw portion 7a of the door stopper 7 is lifted and the lock pin
It is fixed to the washing machine body by 12. Therefore, only the rotary drum 2 becomes rotatable, and this rotation is performed until the drum 2 reaches the door opening / closing position.

FIG. 10A shows that the rotating drum 2 starts to rotate clockwise at a low speed in a state in which the door stopper 7 is unlocked from the rotating drum 2 by the lock pin 12 and the drum door 3 is fixed. Shows the closed state.

When the rotary drum 2 is rotated clockwise, step S25
In step S26, the output state of the detection signal from the drum position detector 10 is fetched into the CPU 9a, and in the next step S26, the rotating drum 2
It is determined whether has been rotated to the door open / close position. If it is determined that the rotary drum 2 has been rotated to the door open / close position, the process proceeds to step S27, and the rotation of the drum drive motor 8 is stopped.

FIG. 10B shows a state in which the rotary drum 2 is rotated to the door open / close position, and in this state, the opening 2b of the rotary drum 2 is opened.
Is completely covered by the drum door 3.

When the opening 2b of the rotary drum 2 is completely closed by the drum door 3, the process proceeds to step S28, the backward drive command is given to the pin drive motor 15 again to activate the pin drive motor 15, and the lock pin 12 is further retracted. Let With this lock pin 12
Is operated by the backward end detection switch 20, the output state of the detection signal is fetched into the CPU 9a (step S29),
It is determined whether the lock pin 12 has reached the backward end position (step S30). Here, when it is determined that the lock pin 12 has reached the backward end position X, the process proceeds to step S31, the pin drive motor 15 is stopped, and the lock pin 12 is stopped.

FIG. 10C shows a state in which the lock pin 12 has been moved to the retracted end position X, the door stopper 7 returns to the normal position, and the claw portion 7a is locked to the hooking portion 2c of the rotary drum 2. ing.
As a result, the drum door 3 is brought into a locked state with respect to the rotary drum 2, and the rotary drum 2 is brought into a state in which the washing or drying process can be started by rotational driving.

According to the present embodiment, the drum door of the rotary drum in the drum type washer / dryer can be automatically opened and closed, and the operator can automatically open the drum door when the washing or drying process is completed. By opening the outer lid of the main body, you can immediately put in and take out laundry without opening the door of the rotating drum.

Further, since the rotary drum 2 can be locked by the operation of the lock pin 12 to the forward end position Z in the state where the drum door 3 is opened, the rotary drum 2 keeps the laundry in and out during the loading and unloading of the laundry. It is possible to reliably prevent the movement in the weight direction due to an offset or the like.

In addition, by closing the outer lid of the main body after loading or unloading the laundry, the door of the rotating drum can be automatically closed, and the operator can perform the troublesome opening / closing operation of the door of the rotating drum. There is no need to do it.

<Second Embodiment> FIG. 11 is a block diagram showing a door locking means relating to a door opening / closing device of a rotary drum according to a second embodiment of the present invention, and FIG. 12 is a rotation of the second embodiment of the present invention. It is a block diagram which shows the control circuit which concerns on the door opening / closing apparatus of a drum. That is, FIGS. 11 and 12 show a second embodiment of the door opening / closing device for the rotating drum of the washer / dryer according to the present invention, FIG. 11 is a block diagram of the door locking means, and FIG. It is a block diagram of a drum door opening and closing control unit. 11 and 12 are different from the embodiment shown in FIGS. 4 and 6 in that the lock pin is operated by a rack and pinion and the lock means is locked at the door opening completion position of the rotating drum. It is in the place where it was made to do by.

First, in FIG. 11, the lock pin 12 constituting the door lock means 11A is supported by the bearing 13 fixed to the outer peripheral surface of the outer tub 23 so as to be slidable in the radial direction of the rotary drum 2. A rack 24 is formed along the longitudinal direction of the lock pin 12 on the protruding end side of the outer tub 23, and a pinion 25 is meshed with the rack 24. The pinion 25 is fixed to an output shaft 26a of a lock pin drive motor 26 with a reduction gear. The lock pin drive motor 26 is supported by the support member 27 in the outer tub 23. Detecting switches 18 and 20 such as limit switches for detecting the forward end and the backward end of the lock pin 12 are attached to the support member 27. Each of the detection switches 18 and 20 is a switch actuator provided on the lock pin 12. It works by detecting 21.

At one end of the drum door 3 that covers the opening 2b of the rotary drum 2, a door stopper 7 for locking the drum door 3 in a closed state is movably attached to the drum door 3, and is rotated by a torsion spring (not shown) or the like. While being urged clockwise, the fishing hook 7a provided at the tip is locked by the hook 2c when the drum door 3 fully closes the opening 2b of the rotary drum 2,
The drum door 3 can be locked on the rotary drum 2. The lock pin 12 is engaged with and disengaged from the recess 7b provided at the tail end of the door stopper 7.

In FIG. 12, the control circuit 9 includes a CPU 9a that controls the whole as in FIG. 6, a ROM 9b that stores a program for controlling the opening and closing of the door, a RAM 9c that stores the calculation result of the CPU 9a and other data. , An input interface 9d and an output interface 9e, which are connected to the CP via the bus 9f.
It is connected to U9a.

The input interface 9d also includes a drum position detector.
The detection switches 18 and 20 for detecting the forward end and the backward end of the lock pin 12 and the lock pin 12 are connected, and the output interface 9e is connected to the drum drive motor 8, the lock pin drive motor 26, and the brake 28 for braking the rotary drum 2. Has been done.

Next, the operation of the embodiment configured as described above will be described based on the flowcharts of FIGS. 13 and 14.

FIG. 13 is a flowchart showing a door opening operation in the door opening / closing device for the rotary drum of the second embodiment of the present invention,
FIG. 14 is a flow chart showing the door closing operation of the door opening / closing device for the rotary drum according to the second embodiment of the present invention.

First, when the washing and drying of the laundry is completed and the washer / dryer system is set to the automatic door opening mode, the automatic drum door opening program shown in FIG. 13 starts. Accordingly, the control circuit 9 first gives a counterclockwise start command to the drum drive motor 8 from the CPU 9a through the output interface 9e, thereby starting the drum drive motor 8 and rotating the rotary drum 2 counterclockwise. Rotate at low speed (step S40). Then, in the next step S41, the state of the detection signal from the drum position detector 10 is changed to the CPU 9a.
In step S42, it is determined whether the rotary drum 2 has been rotated to the door open / close position.

If it is determined that the rotary drum 2 has reached the door opening / closing position, the process proceeds to step S43, where the rotation of the drum drive motor 8 is stopped and at the same time an operation command is issued to the brake 28 to brake the rotary drum 2. , Lock drum 2.
At this time, the recess 7b of the door stopper 7 is placed at the door opening / closing position facing the lock pin 12.

When the drum drive motor 8 stops, the process proceeds to the next step S45, the CPU 9a issues a start command to the lock pin drive motor 26 to rotate the drive motor 26, and the rack 24 and the pinion 25
Causes the lock pin 12 to move forward. Then, in the next step S46, the output state of the detection signal from the forward end detection switch 18 is fetched into the CPU 9a, and it is determined whether or not the lock pin 12 has reached the forward end position (step DS47). Here, when it is determined that the lock pin 12 has reached the forward end position, the process proceeds to step S48, the pin drive motor 26 is stopped, and the brake 28 of the drum 2 is released (step S48).
S49).

When the brake applied to the rotary drum 2 is released, the process proceeds to step S50, the start command is given to the drum drive motor 8 again to start the motor 8 counterclockwise, and the rotary drum 2 is slowly rotated counterclockwise. At this time, since the tip of the lock pin 12 is pressed and engaged with the door stopper 7,
Since the drum door 3 is held in a fixed state with respect to the rotary drum 2, the opening 2b of the rotary door 2 is sequentially opened as the rotary drum 2 is rotated counterclockwise. 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. By facing the position detector 10, the output state of the detection signal from the position detector 10 is fetched into the CPU 9a (step S5
1) In the next step S52, it is determined whether the drum 2 is at the door opening completion position. When it is determined that the door opening completion position is reached, the process proceeds to step S53, the drum drive motor 8 is stopped, and the drum brake 28 is operated (step S54).
The rotary drum 2 is locked. This allows the laundry to be taken 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.

FIG. 15 is a constitutional view showing a door locking means for a door opening / closing device for a rotary drum according to a third embodiment of the present invention.

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 command is given by closing the outer lid or the like, the program shown in FIG. 14 starts. To do. Along with this, the control circuit 9
First, the CPU 9a gives a release command to the drum brake 28 through the output interface 9e to release the brake 28 (step S60). When the brake 28 is released, the process proceeds to step S61, and the CPU 9a issues a clockwise start command to the drum drive motor 8 through the output interface 9e. 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 S62
In step S9, the output state of the detection signal from the drum position detector 10 is fetched into the CPU 9a, and in the next step S63, the rotating drum 2
It is determined whether has been rotated to the door open / close position. Here, when it is determined that the rotary drum 2 has been rotated to the door open / close position, the process proceeds to step S64, and the rotary drum 2 of the drum drive motor 8 is further rotated clockwise for a predetermined time, whereby the drum door 3 is operated. Completely close the opening 2b of the rotating drum 2. Then, it progresses to step S65 and rotation of the drum drive motor 8 is stopped. Then, the drum brake 28 is operated to hold the rotary drum 2 in the locked state (step
S66).

When the opening 2b of the rotary drum 2 is completely closed by the drum door 3, the process proceeds to step S67, in which a backward drive command is given to the pin drive motor 26 to activate the pin drive motor 26 and retract the lock pin 12. . At the same time, it is determined whether the lock pin 12 has been operated by the backward end detection switch 20 by taking the output state of the detection signal into the CPU 9a (step S68), and determining whether the lock pin 12 has reached the backward end position (step S6).
9). Here, if it is determined that the lock pin 12 has reached the backward end position, the process proceeds to step S70, the pin drive motor 26 is stopped to stop the lock pin 12, and the drum brake 28 is released (step S70). S71). As a result, the door stopper 7 is brought into the state shown by the broken line in FIG. 11 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 the present embodiment as described above, the same effect as that of the first embodiment is obtained, and since the rotary drum 2 is locked by the brake 28, the locked state becomes reliable, and the rack 24 and Since the pinion 25 is used to move the lock pin 12 forward and backward, its position accuracy is improved, and the lock pin 12 does not move even if vibration occurs during dehydration, ensuring reliability and safety. Can be improved.

<Third Embodiment> FIG. 15 is a block diagram showing a third embodiment of the door locking means according to the present invention.

In the figure, the point different from FIG. 11 is that the lock pin is moved back and forth using a ball screw.

That is, the lock pin 12 is supported by the bearing 13 attached to the outer peripheral surface of the drum outer tank 23 so as to be slidable in the radial direction of the outer tank 23,
A male screw 29 is formed on the protruding side of the lock pin 12 from the outer tub, and a nut member 30 is screwed into the male screw 29 via a ball (not shown). The nut member 30 is rotatably supported by a support member 27 via a bearing 13 and also has a large gear.
32 is integrally fixed, and the large gear 32 meshes with the pinion 33. The pinion 33 is fixed to a rotation shaft 34a of a lock pin drive motor 34 attached to the support member 27. Further, similarly to FIG. 11, the support member 27 is provided with detection switches 18 and 20 for detecting the forward end and the backward end of the lock pin 12, and the detection switches 18 and 20 are attached to the lock pin 12. It operates by detecting the provided switch actuator 21.

Ball screw type door locking means configured as described above
In 11B, since a feed screw with zero backlash can be obtained for the lock pin 12, the position accuracy of the door stopper opening / closing operation is further improved, and along with this, the drum is clocked for the predetermined time shown in step S64 in FIG. The step of rotating in the direction is not necessary, and even when the power is off, the lock pin 12 does not move backward and forward due to vibration etc., further improving the reliability and safety of the operation of the door locking means. it can.

In this way, the door opening / closing device for the rotary drum of the above-described embodiment is
The rotary drum 2 is rotatably operated by a drum driving means composed of a drive motor 8 in the casing 1, and the drum opening 3b provided on the peripheral wall of the rotary drum 2 is opened and closed so as to be slidably attached to the outer periphery of the rotary drum 2. A drum door 3, and a door stopper 7 provided on the drum door 3 for locking or unlocking the drum door 3 with respect to the rotary drum 2.
The drum position detecting means 10 for detecting a predetermined position in the rotating direction of the rotary drum 2 and the drum door 3 provided by the door stopper 7 are disposed near the outer periphery of the rotary drum 2 of the casing 1, and when the rotary drum 2 is at the door opening / closing position. While releasing the lock of
Door locking means 11A, 11B for holding the drum door 3 in an immovable state with respect to the casing 1, drum locking means for locking the rotating drum 2 at a position where the opening of the rotating drum 2 is fully opened, and opening / closing of the drum door 3. At this time, the door locking means is controlled, and the rotary drum 2 is rotated to a door opening / closing position for opening / closing the drum door 3 and is opened / closed at a predetermined angle in the forward or reverse direction from the door opening / closing position. Control means for controlling the drum driving means including the drive motor 8 and for controlling the drum locking means.

According to this configuration, the control means including the control circuit 9 controls the drum driving means including the drive motor 8 to rotate the rotary drum 2 to a predetermined position (door opening / closing position) for opening and closing the door, and first, the door. The door stopper 7 provided on the drum door 3 is operated by the locking means 11A and 11B, and the door stopper 7 is unlocked so that only the rotary drum 2 is rotatable. In this state, the drum driving means constituted by the driving motor 8 is controlled by the control means constituted by the control circuit 9 to rotate the rotary drum 2 in the forward or reverse direction by a predetermined angle, whereby the drum opening provided in the peripheral wall of the rotary drum 2. Open and close part 3b. That is, the drum door 3 is kept fixed and only the rotary drum 2 is rotated to open and close the drum opening 3b. Further, the drum door 3 is rotated by rotating the rotating drum 2 in the forward or reverse direction by a predetermined angle.
After the opening operation is performed, the rotary drum 2 can be made immovable with respect to the casing 1 by the drum lock means. Therefore, the drum door 3 can be automatically opened and closed without requiring human labor.

[Effects of the Invention] As described above, according to the door opening / closing device for a rotary drum of the present invention, the automatic opening / closing operation of the drum door for opening / closing the rotary drum opening, and the rotary drum during the opening of the drum door. Can be automatically fixed, and the operator can be freed from bothersome door opening and closing operations and drum opening position adjustment work, thus improving workability. Also, since the door closing operation is automatically performed, forgetting to close the door, or effectively preventing the contents from popping out while the rotating drum is rotating due to insufficient closing or damage to the equipment due to the popped-out contents. be able to. Further, when the surface of the drum is hot, it is not necessary to directly touch the drum to open and close the drum surface, thus improving the safety of the operator.

[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. FIG. 3 is a perspective view showing a mounting state of the rotary drum on a rotary drum, FIG. 3 is a perspective view showing a drum door of a rotary drum door opening / closing device according to a first embodiment of the present invention, and FIGS. 4 and 5 show the present invention. FIG. 6 is a schematic view showing the main components of the door locking means of the door opening / closing device for a rotating drum according to the first embodiment of the present invention and its operating state. FIG. 6 is a door opening / closing device for a rotating drum according to the first embodiment of the present invention. FIG. 7 is a configuration diagram showing a control circuit according to the present invention, FIG. 7 is a flow chart showing an open state of a drum door in a rotary drum door opening / closing device according to a first embodiment of the present invention, and FIG. 8 is a first embodiment of the present invention. Drum door closure in a rotating drum door opener Flowchart illustrating, FIG. 9 A,
B, C and D are partial schematic views showing respective stages of the opening operation of the drum door according to the door opening / closing device of the rotary drum which is the first embodiment of the present invention, and FIGS. 10A, 10B and 10C show the first embodiment of the present invention. Partial schematic view showing the operation of each stage of the closing operation of the drum door of the rotary drum door opening / closing apparatus according to one embodiment, and FIG. 11 relates to the rotary drum door opening / closing apparatus according to the second embodiment of the present invention. FIG. 12 is a block diagram showing a door locking means, FIG. 12 is a block diagram showing a control circuit relating to a door opening / closing device for a rotary drum which is a second embodiment of the present invention, and FIG. 13 is a rotation which is a second embodiment of the present invention. FIG. 14 is a flowchart showing a door opening operation in the door opening / closing device for the drum, FIG. 14 is a flowchart showing a door closing operation in the door opening / closing device for the rotating drum according to the second embodiment of the present invention,
FIG. 15 is a configuration diagram showing a door locking means relating to a door opening / closing device for a rotating drum according to a third embodiment of the present invention, and FIG. 16 is a schematic perspective view of a drum type washing machine for explaining the configuration of a conventional rotating drum. It is a figure. In the figure, 2: rotating drum, 2d: small hole, 3: drum door, 3b: drum opening, 7: door stopper, 9: control circuit, 10: drum position detector, 11, 11A, 11B: door locking means, 12: Lock pin, 28: Brake. In the drawings, the same reference numerals and symbols indicate the same or corresponding constituent parts.

Claims (1)

[Claims] 1. A rotary drum which is rotatably operated by a drum driving means in a casing, and a drum door which is slidably mounted on the outer periphery of the rotary drum to open and close a drum opening provided on a peripheral wall of the rotary drum. A door stopper provided on the drum door for locking or unlocking the drum door with respect to the rotary drum, and drum position detection detection for detecting a predetermined position in the rotation direction of the rotary drum, The casing is arranged in the vicinity of the outer circumference of the rotating drum,
Door lock means for unlocking the drum door by the door stopper and holding the drum door in an immovable state with respect to the casing when the rotating drum is at the door opening / closing position; and an opening portion of the rotating drum. A drum lock means for locking the rotary drum at a fully opened position, and a door opening / closing position for controlling the door lock means when opening / closing the drum door and for opening / closing the drum door with respect to the rotary drum. Control means for controlling the drum drive means and for controlling the drum lock means so as to give a rotation operation and an opening / closing rotation operation at a predetermined angle from the door opening / closing position in the forward direction or the reverse direction. Door opening / closing device for rotating drum.