JPH01317488A - Door opening and closing device for revolving drum - Google Patents

Abstract

PURPOSE:To automatically execute the positioning of an aperture part and the opening and closing of a door by providing a control means to control a drum driving means so as to give revolving operation up to a door opening and closing position, where the opening and closing of the drum door is executed to a revolving drum, and opening and closing revolving operation at a prescribed angle from the door opening and closing position in a regular or reverse direction and to control a drum lock means. CONSTITUTION:The revolution drive of the revolving drum is executed by a driving motor 8 and a revolving speed and a revolving direction are controlled by a control circuit 9. The prescribed position of a revolving drum 2 in the revolving direction is detected by a drum position detector 10. A door lock means 11 is arranged near the outer circumference of the drum in a casing 1. When the revolving drum 2 is in the door opening and closing position, first operation is executed to obtain the lock canceling condition of a door stopper 7 and to cause a drum door 3 to be a not-movable condition. Further, when the opening operation of the drum door 3 is executed, second operation is executed to cause the revolving drum 2 to be the not- movable condition. The drum door 3 is fit with being slidable so that an aperture part 2b can be opened and closed on the outer circumference of the revolving drum 2.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a door opening/closing device for a rotating drum, and in particular to a door opening/closing device for a rotating drum used in a drum type washing machine or a drum type dryer. This invention relates to a door opening/closing device that automatically opens and closes the drum door of this opening.

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

FIG. 16 is a schematic perspective view of a conventional drum-type washer/dryer, in which a rotary drum 2 is rotatably supported within a casing 1 for carrying out washing and drying processes. The peripheral wall 2a of the rotating drum 20 is provided with a drum 27113 that opens and closes an opening for loading and unloading the laundry, and the drum door 3 has a latch for locking it to the rotating drum 2 in the closed state. Tool 4 is attached.

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

Therefore, in such a drum-type washing/drying machine, when loading laundry or drying items in the rotating drum, first open the outer lid 6, then manually rotate the rotating drum 2 to adjust the position of the drum door 3. After facing the opening 5, the latch 4 of the drum 2 is released, the drum door 3 is slid to open the laundry opening of the drum, and the work of loading and unloading laundry or drying items is performed. ing.

[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 and closes the drum door 3. Therefore, there is a problem that the operation is complicated and the workability is poor.

Also, the drum door may not close properly,
Or, if you forget to close it, rotating the drum may cause the contents to spill out, damaging the contents or damaging the equipment.
Other components may be damaged.

Furthermore, in a rotating drum used in a drum-type washer/dryer as shown in FIG. 16, after releasing the outer M6, the rotating drum 2 is manually rotated until the drum door 3 is in the upper position. Not only is it necessary to open and close the drum door by releasing the latch 4, which is a cumbersome task, but also the drum surface is hot at the end of the drying process, making it difficult to open and close the door manually. There was a problem that there was a risk of burns during the work.

This invention was made in order to solve the above-mentioned problems, and an object thereof is to provide a door opening/closing device for a rotating drum that can automatically position the opening of the rotating drum and open/close the drum door. shall be.

[Means for Solving the Problem] A rotating drum opening/closing device according to the present invention has a drum door slidably attached to the outer periphery of the rotating drum, and the drum door is locked or unlocked with respect to the rotating drum. a door stopper for controlling the drum door; a drum position detecting means for detecting the rotational direction position of the rotating drum; and a drum position detecting means for detecting the rotational direction position of the rotating drum; door locking means for holding the rotating drum in an immovable state with respect to the casing at the same time as the drum door is released; means for locking the rotating drum in a position where the opening of the rotating drum is fully opened; and controlling the door locking means when opening and closing the drum door. At the same time, controlling the drum driving means to give the rotary drum a rotational movement to a door opening/closing position for opening and closing the drum door, and an opening/closing rotational movement of a predetermined angle in the forward or reverse direction from the door opening/closing position, and control means for controlling the drum locking means.

[Function] According to the above configuration, the drum driving section is controlled by the eight control circuits to rotate the rotating drum to a predetermined position for opening and closing the door (door opening/closing position), and first, the door locking means is installed on the drum door. The operator operates the door stopper that has been opened, and releases the stopper so that only the rotary drum can rotate.

In this state, the drum drive means is controlled by the control means to rotate the rotary drum by a predetermined angle in the forward or reverse direction, thereby opening and closing the drum opening provided in the peripheral wall of the rotary drum. That is, the drum opening is opened and closed by keeping the drum door fixed and rotating only the rotary drum.

Furthermore, after the drum door is opened by rotating the rotating drum by a predetermined angle in the forward or reverse direction,
The rotating drum can be immovable relative to the casing by the drum locking means.

Therefore, according to the present invention, the drum door can be opened and closed automatically without requiring any human effort.

[Examples] Examples of the present invention will be described in detail below. An example in which the present invention is applied to a dryer will be described.

Fig. 1 is a conceptual diagram showing the overall configuration of the present invention, in which a rotating drum 2 is rotatably supported in a casing l, and an opening 2b provided in the peripheral wall of the rotating drum is shown. A drum door 3 that can be covered is provided so as to be slidable 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 rotating drum 2 in a closed state.

The rotary drum is driven to rotate by a motor 8, and the rotation speed and direction of this motor 8 are controlled by a control circuit 9.

In addition, IO is a drum position detector that detects a predetermined position in the rotational direction of the rotating drum 2. For example, a magnetic sensor is installed in an outer tank (not shown), and an iron piece is attached to a pulley part of the rotating drum. This detects a predetermined position in the rotational direction of the drum.

Reference numeral 11 denotes a door locking means, which is disposed inside the casing 1 near the outer periphery of the drum. This door locking means 11 performs an operation of releasing the locking state of the door stopper 7 and a first operation of making the drum door 3 non-movable when the rotating drum 2 is in the door opening/closing position. A second device that makes the rotating drum 2 non-movable when the opening operation is performed.
perform an action.

FIG. 2 is an explanatory diagram showing how the drum door 3 is attached to the rotating drum. The drum door 3 opens and closes a drum opening 2b provided on the peripheral wall of the rotating drum 2, and is slidably attached to the outer periphery of the rotating drum 2 so as to open and close the opening 2b.

FIG. 3 is a perspective view of the drum door 3. Sliding grooves 3a are provided on both sides of the drum door 3.
The drum door engages with ribs (not shown) formed at both ends of the circumferential wall of the rotating drum 2, thereby holding the drum door 3 slidably along the circumferential surface of the rotating drum. On one end side, as shown in FIGS. 3 and 4, the middle part of the door stopper 7 is rotatably mounted in the radial direction of the rotary drum 3 by means of a shaft pin, and the torsion spring 22 keeps the door stopper 7 as shown in FIG. It is biased counterclockwise. Further, the door stopper 7 has a claw part 7a at the tip, and this claw part is used when the drum door 3 fully closes the opening 2a of the rotating drum 2.
It is latched to a latching portion 2C formed on the peripheral wall of the rotating drum 2,
This locks the drum door 3 to the rotating drum 2 to prevent it from shifting. At this time, the spring 22
The claw portion 7a of the rotary drum 2 is biased in a direction in which it is hooked onto the hook portion 2C of the rotating drum 2. In addition, at the tail end of the door stopper 7,
A recess 7b is formed in which a lock pin 12 of a door locking means 11 (to be described later) engages, and by pushing down the lock bin 12 while it is engaged with this recess 7b, the door stopper 7 is applied to the biasing force of the spring. Against the claw part 7a
is rotated in a direction away from the locking portion of the rotating drum 2, and at the same time, the drum door 3 is held in an unlocked state with respect to the rotating drum 2.

Furthermore, a drum lock opening 3b, which is one of the characteristic components of the present invention, is provided below the recess 7b of the door stopper of the drum door 3. This drum lock opening 3b is opened by pushing the door stopper 7 further downward from the unlocked position using the lock pin 12 of the door locking means 11, thereby moving the tail end of the door stopper 7 to the lower position of the drum door 3. This makes it possible to protrude toward the rotating drum 2 side located at.

FIG. 4 is a main configuration diagram of the door locking means 11.

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

A motor 15 is a driving source for moving the lock bin 12 in the longitudinal direction (radial direction of the rotating drum), and a pulley 16 is attached to the rotating shaft 15a. A wire 17 is wound around the outer periphery of the pulley 16, 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 and rear directions by rotating the pulley 16 in forward and reverse directions.

Further, in the longitudinal direction of the lock pin 12, the front thereof.

Forward end detection switch 1 to detect rear end and intermediate position
8. Intermediate detection switch 19 and backward end detection switch 20
is arranged, and when the switch actuator 21 attached to the lock pin 12 faces each of the detection switches 18 to 20, a switch signal opposite to that when the actuator 21 is not opposed is sent from each detection switch 18 to 20, for example. An on signal is output to the control circuit 9. The position of the lock pin 12 indicated by the broken line in the figure is the rearward end position X, and the position of the lock pin 12 indicated by the solid line is the intermediate position Y.
It is. As a first operation, the door locking means 11 performs a downward movement of the lock pin 12 from the rearward end position X to the intermediate position Y.

When the lock pin 12 moves toward the rotating drum and pushes down the four portions 7b of the tail end of the door stopper 7 mentioned above against the tip of the lock pin 12, the claw portion 7a of the door stopper is released from the hook portion 2c of the rotating drum. Leave.

FIG. 5 shows a state in which the lock pin 1212 is further lowered from the intermediate position Y and moved to the forward end position Z. The door locking means 11 performs a lowering operation of the lock pin 12 from the intermediate position Y to the forward end position Z as a second operation.

By this downward movement to the forward end position 2, the lock pin 12 pushes down the recess 7b of the door stopper 7 and causes the recess 7b, which is the tail end of the door stopper, to protrude from the drum lock opening 3b. This protruding recess 7b engages with a small hole 2d provided near the opening 2b of the rotary drum 2 located at the bottom of the drum door 3. As a result, the rotating drum 2 becomes unable to rotate.

Further, when the lock pin 12 retreats and moves toward the rearward end position, the door stopper 7 returns to the normal state position shown by the broken line in the figure due to the biasing force of the spring 22. Door lock means 11
The main components of the washing machine are attached to the casing l or, in the case of a drum-type washing machine, to the outer tub via packing or the like.

FIG. 6 shows an example of the internal configuration of the control circuit 9, which is composed of a microcomputer.

That is, the control circuit 9 includes a CPU 9a that controls and manages the entire memory, input/output devices, etc., and an opening 2b of the rotating drum 2 that connects the opening 2b of the rotating drum 2 to the laundry inlet/outlet 6 of the casing 1 (see FIG. 9).
Or a ROM 9b that stores a processing program for positioning at the opening of the outer tank formed opposite to the take-out port 6 of the casing l, a processing program for automatically opening and closing the drum door 3, etc., and calculation results of the CPU 9a and others. RAM 9C that stores data, and input interface 9
d and an output interface 9e, which are connected to the CPU 9a via a bus 9f.

The drum position detector 8 and the detection switches 1B, 19.20 are connected to the input interface 9d, and the drum drive motor 8 and the lock pin drive motor 15 are connected to the output interface 9e.

Next, the operation of this embodiment configured as described above will be explained based on the flowcharts of FIGS. 7 and 8 and the operation diagrams of FIGS. 9 and 1O.

The flowchart in FIG. 7 shows the automatic opening operation of the drum door 3, and shows the automatic opening operation of the drum door 3.
The figure shows a partial schematic diagram of a drum-type washer/dryer showing each stage of the drum door opening operation.

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 program shown in FIG. 7 starts.

Accordingly, the control circuit 9 first receives a counterclockwise start command from the CPU 9a to the drum drive motor 8 through the output interface 9e, and thereby starts the drum drive motor 8 to rotate the rotating drum 2 in the counterclockwise direction. (Step 31). Then, in the next step S2, the output state of the detection signal from the drum position detector 10 is input to the CPU 9a, and in step S3 it is determined whether the rotary drum 2 has been rotated to the door opening/closing position.

If “NO”, return to step S1 and step 5l-3
Repeat step 3 until the drum is rotated to the door open/close position.

Here, if it is determined that the rotating drum 2 has come to the door opening/closing 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 rotating drum 2 is stopped at this door opening/closing position.

When the drum drive motor 8 stops, the process proceeds to the next step S5, where the CPU 9a gives a start command to the lock pin drive motor 15, rotates the drive motor 15, and connects the lock pin 12 via the pulley 16 and wire 17. move forward. Then, in the next step S6, the output state of the detection signal from the intermediate detection switch 19 is determined by the CPU 9.
a, and it is determined whether the lock pin 12 has reached the intermediate position (step S7). Here, if it is determined that the lock pin 12 has been advanced to the intermediate position Y, the process proceeds to step S8, and the pin drive motor 15 is stopped to stop the lock pin 12 from moving forward.

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. As a result, the drum door 3 is released from the rotating drum 2,
It becomes possible to slide relative to the rotating drum 2.

When the pin drive motor 15 stops, the process proceeds to step S9, where a start command is given to the drum drive motor 8 again to start the motor 8.
A starting command is given in the counterclockwise direction to start the motor 8 in the counterclockwise direction, and the rotary drum 2 is slowly rotated in the counterclockwise direction. At this time, the end of the lock pin 12 presses and engages with the door stopper 7, so that the drum door 3 is opened to the rotating drum 2.
Since the rotating drum 2 is held in a fixed state relative to the rotating drum 2, the openings 2b are successively opened as the rotating drum 2 is rotated counterclockwise. As the rotating drum 2 is rotated counterclockwise, a door opening/closing position detection piece and another door opening completion position detection piece (not shown, but provided on the pulley of the rotating drum 2) are connected to the drum position detector 10. By facing each other, the output state of the detection signal from the position detector 10 is changed to C.
The information is taken into the PU 9a (step 5lo), 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 is at the complete opening position, step 31
2, 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 so as to face the opening 6 of the casing 1. As is clear from the figure, the opening 2b provided in the peripheral wall of the rotating drum 2 moves to the left in the figure from the position where it is covered by the drum door 3, and is no longer covered by the drum door 3, so that the opening 2b is closed. It's open. This series of operations completes the automatic opening operation of the rotating drum 2.

Next, a second operation for making the rotating drum 2 non-movable is started.

First, a start command is given to the pin drive motor 15, and by starting it, the lock pin 12 is further advanced from the intermediate position Y (step 513). And the next step S
In step 14, the output state of the detection signal from the forward end detection switch 18 is input to the CPU 9a, and it is determined whether the lock pin 12 has reached the forward end position Z (step 515). Here, if it is determined that the lock pin 12 has reached the advanced end, the process proceeds to step S16, and the forward movement of the lock pin 12 is stopped.

The ninth diagram shows a state in which the lock pin 12 is at the forward end position Z, and at this time, the tail end 7b of the door stopper is
Drum lock opening 3b of drum door 3 and rotating drum 2
It is in a state where it protrudes inside the rotating drum 2 from the small hole 2d. By fitting the tail end into the small hole 2d of the rotating drum, the rotating drum 2 is held in a locked state in which it cannot rotate in either the forward or reverse direction. This allows laundry to be taken in and out of the rotating drum 2.

Next, the automatic closing operation of the drum door 3 will be explained with reference to the flowchart of FIG. 8 and the closing operation diagram of FIG. 10.

When the washed and dried laundry is taken out from the rotating drum 2, new laundry is put into the rotating drum 2, and a washing command is given by closing the outer lid, etc., the program shown in FIG. 8 starts. do. Accordingly, the control circuit 9 first gives a start command to the pin drive motor 15 from the CPU 9a through the output interface 9e, thereby starting the pin drive motor 15 and moving the lock pin 12 to the ninth position.
Move from the aiming state to the backward direction (step 520)
. Then, in the next step S21, the output state of the detection signal from the intermediate detection switch 19 is input to the CPU 9a, and it is determined whether the lock pin 12 has retreated to the intermediate position (step 522).

If it is determined that the lock pin 12 has been retreated to the intermediate position Y, the process proceeds to step S23, where the pin drive motor 15 is stopped to stop the lock pin 12 from moving backward.

When the lock pin 12 is retracted to the intermediate position, the rotary drum 2 is unlocked by the door stopper 7, and the program moves to step S24.

In this step S24, a clockwise start command is given to the drum drive motor 8 from the CPU 9a through the output interface 9e. This starts the drum drive motor 8 and rotates the rotary drum 2 clockwise at low speed. At this time, the drum door 3 is moved by the claw portion 7a of the door stopper 7.
is in a lifted state and fixed to the main body of the washing machine by the lock pin 12. Therefore, only the rotary drum 2 becomes rotatable, and this rotation is continued until the drum 2 reaches the door opening/closing position.

FIG. 10A shows that the rotary drum 2 begins to rotate clockwise at a low speed with the door stopper 7 unlocked from the rotary drum 2 and the drum door 3 fixed by the lock pin 12. It shows the condition.

When the rotating drum 2 is rotated clockwise, step S2
5, the output state of the detection signal from the drum position detector 10 is input to the CPU 9a, and in the next step 326, it is determined whether the rotary drum 2 has been rotated to the door opening/closing position. Here, if it is determined that the rotating drum 2 has been rotated to the door opening/closing position, the process proceeds to step S27, and the rotation of the drum drive motor is stopped.

FIG. 10B shows a state in which the rotating drum 2 has been rotated to the door opening/closing position, and in this state, the opening 2 of the rotating drum
b is completely covered by the drum 3.

When the opening 2b of the rotating drum is completely closed by the drum door 3, the process proceeds to step 32B, where the pin drive motor 15
A backward start command is given again to start the pin drive motor 15, and the lock pin 12 is further moved backward. At the same time, the output state of the detection signal indicating whether the lock pin 12 has been operated by the rearward end detection switch 20 is imported into the CPU 9a (step 529), and it is determined whether the lock pin I2 has reached the rearward end position (step 530). ). If it is determined that the lock pin 12 has reached the rearward end position X, the process proceeds to step S31, where 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 rearward end X, the door stopper 7 has returned to its normal position, and the claw portion 7a is engaged with the latching portion of the rotating drum. As a result, the drum door 3 is locked to the rotary drum 2, and the rotary drum 2 is driven to rotate so that the washing or drying process can be started.

According to this embodiment, it is possible to automatically open and close the drum door of the rotating drum in a drum-type washer/dryer. When you open the outer lid of the main unit, you can immediately load and unload laundry without opening the rotating drum door.

Furthermore, when the drum door 3 is open, the rotating drum 2 can be locked by moving the lock pin 12 to the forward end position Z. It is possible to reliably prevent movement in the weight direction due to deviation or the like.

Furthermore, by closing the outer lid of the main unit after loading or unloading the laundry, the door of the rotating drum can be automatically closed, allowing the operator to avoid the troublesome operation of opening and closing the door of the rotating drum. There is no need to do so.

Figures 11 and 12 show a second embodiment of the door opening/closing device for a washing/drying rotating drum according to the present invention. Figure 11 is a block diagram of the door locking means, and Figure 12 is a block diagram of a drum door opening/closing control section. 11 and 12, the difference from the embodiment shown in FIGS. 4 and 6 is that the lock pin is operated by a rack pinion, and the locking of the rotary drum at the door opening position is performed by a brake means. This is how it is done.

First, in FIG. 11, the lock pin 12 constituting the door locking means 11A is supported by a bearing 13 fixed to the outer peripheral surface of the outer tank 23 so as to be slidable in the radial direction of the rotating drum 2. A rack 24 is formed along the longitudinal direction of the lock pin 12 on the side where the lock pin 12 projects outward from the outer tank 23, and a pinion 25 is engaged with the rack 24. pinion 2
5 is fixed to an output shaft 26a of a lock pin drive motor 26 with a reduction gear. Further, the lock pin drive motor 26 is supported by the outer tank 23 by a support member 27. The support member 27 includes a detection switch 18 such as a limit switch that detects the forward end and the backward end of the lock pin 12.
20 is installed, and each detection switch 18.2
0 operates by detecting the switch actuator 21 provided on the lock pin 12.

A door stopper 7 is pivotally attached to one end of the drum door 3 that covers the opening of the rotating drum 2 to lock it to the rotating drum 2 in a closed state, and is rotated by a torsion spring or the like (not shown). While being biased clockwise,
When the drum door 3 fully closes the opening of the rotating drum 2, the ladle-shaped claw portion 7a provided at the tip is latched to the latch portion 2e, so that the drum door 3 can be locked to the rotating drum 2. There is.

Further, a lock pin 12 is engaged with and disengaged from a recessed portion 7b provided in a continuous portion of the door stopper 7.

In FIG. 12, the control circuit 9 includes a CPU 9a that controls the entire system in the same way as in FIG. It includes a RAM 9c, a manual interface 9d, and an output interface 9e, which are connected to the CPU 9a via a bus 9f.

Further, the input interface 9d is connected to a drum position detector 10 and a detection switch 18.20 for detecting the forward end and backward end of the lock pin, and the output interface 9e is connected to the drum drive motor 8, the lock pin drive motor 26, and the like. And a brake 28 for braking the rotating drum 2 is connected.

Next, the operation of the embodiment configured as described above will be explained based on the flowcharts of FIGS. 13 and 4.

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 receives a counterclockwise start command from the CPU 9a to the drum drive motor 8 through the output interface 9e, and thereby starts the drum drive motor 8 to rotate the rotating drum 2 in the counterclockwise direction. (step 540). Then, in the next step 341, the state of the detection signal from the drum position detector 10 is taken into the CPU 9a, and in step S42 it is determined whether the rotary drum 2 has been rotated to the door opening/closing position.

Here, if it is determined that the rotating drum 2 has come to 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 2B to apply the brake to the rotating drum 2. , locks drum 2. At this time, the recess 7b of the door stopper 7 is inserted into the lock pin 12.
The door is placed in the opening/closing position facing the door.

When the drum drive motor 8 stops, the next step 345
Then, the CPU 9a gives a start command to the lock pin drive motor 26 to rotate the drive motor 26, and the rack 24 is rotated.
The lock pin 12 is moved forward by the pinion 25. Then, in the next step 7"S46, the output state of the detection signal from the forward end detection switch 18 is detected by the CPU 9a.
It is determined whether the lock pin 12 has reached the forward end position (step 547). Here, lock pin 12
When it is determined that has reached the forward end position, step 3
48, the pin drive motor 26 is stopped and the drum brake 28 is released (step 549).

When the brake on the rotary drum 2 is released, the process proceeds to step S50, where a start command is again given to the drum drive motor 8 to start the motor 8 counterclockwise, and the rotary drum 2 is slowly rotated counterclockwise. At this time, the drum door 3 is held in a fixed state with respect to the rotating drum 2 by the pressing engagement of the tip of the lock pin 12 with the door stopper 7, so as the rotating drum 2 is rotated counterclockwise. Accordingly, the openings 2b are sequentially opened.

As the rotating drum 2 is rotated counterclockwise,
A door opening/closing position detection piece and another door opening completion position detection piece (not shown, but provided on the pulley of the rotating drum 2) face the drum position detector 1o, thereby detecting the position detector 1o.
The output state of the detection signal is taken into the CPU9a (
In step S51) and 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 is at the complete opening position, the process proceeds to step S53, where the drum drive motor 8 is stopped and the drum brake 28 is operated (step 554), thereby locking the rotating drum.

This allows laundry to be taken in and out of the rotating drum 2.

Next, the automatic closing operation of the drum door 3 will be explained based on the flowchart of FIG. 8 and the closing operation diagram of FIG. 10.

When the washed and dried laundry is taken out from the rotating drum 2, new laundry is put into the rotating drum 2, and a washing command is given by closing the outer lid, etc., the program shown in FIG. 14 starts. do. Accordingly, the control circuit 9
First, the CPU 9a issues a release command to the drum brake 2 through the output interface 9e to release the brake 28 (step 560). When the brake 28 is released, the process proceeds to step S61, and a clockwise start command is given to the drum drive motor 8 from the CPU 9a through the output interface 9e.

This starts the drum drive motor 8 and rotates the rotating drum 2.
Rotate clockwise at low speed.

When the rotating drum 2 is rotated clockwise, step S6
2, the output state of the detection signal from the drum position detector 10 is taken into the CPU 9a, and in the next step S63 it is determined whether the rotary drum 2 has been rotated to the door opening/closing position. Here, if it is determined that the rotating drum 2 has been rotated to the door opening/closing position, the process proceeds to step 364, where the rotating drum 2 of the drum drive motor is further rotated clockwise for a predetermined time, thereby causing the drum door 3 to rotate. Completely close the opening 2b of the drum 2. Thereafter, the process proceeds to step S65, and the rotation of the drum door drive motor 8 is stopped. Then, the drum brake 28 is operated to hold the rotating drum 2 in a locked state (step 366).

When the opening 2b of the rotating drum 2 is completely closed by the drum door 3, the process advances to step S67, and the pin drive motor 2
6 is given a backward start command, the pin drive motor 26 is started, and the lock pin 12 is moved backward. At the same time, when the lock pin 12 is activated by the rearward end detection switch 20, the output state of the detection signal is imported into the CPU 9a (step 36B), and it is determined whether the lock pin 12 has reached the rearward end position (step 569). ). Here, if it is determined that the lock pin 12 has reached the rearward end position, the process proceeds to step S70, where the pin drive motor 26 is stopped to stop the lock pin 12, and the drum brake 28 is stopped.
is released (step S71). As a result, the door stopper 7 enters the state shown by the broken line in FIG. 11 and is engaged with the hook 2e of the rotating drum 2, and the rotating drum 2 becomes ready to start the washing or drying process by rotation.

In this embodiment as described above, in addition to obtaining the same effects as in the first embodiment, the rotary drum 2 is connected to the brake 2.
8, the locked state is ensured, and since the lock pin 12 is moved forward and backward by the rack and pinion, its positioning accuracy is improved and the lock can be maintained even if vibrations occur during dewatering. Since the pin 12 does not move, reliability and safety can be improved.

Implementation ±1 FIG. 15 is a block diagram showing a third embodiment of the door locking means according to the present invention.

The difference between the figure and Figure 11 is that the lock pin is moved forward and backward using a ball screw.

That is, the drum lock pin 12 is supported slidably in the radial direction of the outer drum 23 by a bearing 13 attached to the outer circumferential surface of the drum outer tank 23, and a male thread 29 is formed on the side of the lock pin 12 that projects outside the outer tank. A nut member 30 is screwed onto this male thread 29 via a ball (not shown). The nut member 30 is rotatably supported by the support member 27 via the bearing 13, and a large gear 32 is integrally fixed thereto.
The large gear 32 meshes with a pinion 33. pinion 3
3 is fixed to a rotating shaft 34a of a lock pin drive motor 34 attached to the support member 27. Furthermore, detection switches 18.20 for detecting the forward end and backward end of the lock pin 12 are attached to the support member 27, as in FIG. It operates by detecting the switch actuator 21 provided in the reverse direction.

In the ball-type door locking means 11B configured as described above, since a feed screw with zero backlash with respect to the lock pin 12 is obtained, the positional accuracy of the door stopper opening/closing operation is further improved. This eliminates the need for the step of rotating the drum clockwise for a desired period of time as shown in step 364 in FIG. 14, and prevents the lock pin from moving in the forward and backward directions due to vibration etc. even when the power is off. , the reliability and safety of the operation of the door locking means can be further improved.

[Effects of the Invention] As explained above, according to the rotating drum with an automatic door opening/closing device according to the present invention, the automatic opening/closing operation of the drum door for opening and closing the opening of the rotating drum, and the automatic opening/closing operation of the drum door while the drum door is being opened are The rotating drum can be automatically fixed, and the operator is freed from the troublesome operations of opening and closing the door and adjusting the position of the drum opening, thereby improving work efficiency. In addition, since the door closes automatically, it effectively prevents the contents from spilling out while the rotating drum is rotating due to forgetting to close the door or insufficiently closing the door, and damage to the equipment due to the spilled contents. be able to. Furthermore, since there is no need to directly touch the drum surface to open and close it with your hands, safety for the operator is improved.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram showing the overall configuration of an embodiment of the present invention;
FIG. 2 is an explanatory diagram showing how the drum door according to the present invention is attached to the rotating drum, FIG. 3 is a perspective view of the drum door according to the embodiment, and FIGS. 4 and 5 are main configurations of the door locking means. FIG. 6 is a configuration diagram of a control circuit according to the present invention, FIG. 7 is a flowchart showing the opening state of the drum door, and FIG. 8 is a flowchart showing the closing operation of the drum door. , Figures 9A, B, C and D are partial schematic diagrams showing each stage of the opening operation of the drum door, Figure 10A,
B and C are partial schematic diagrams showing each stage of the drum door closing operation, FIG. 11 is a configuration diagram showing a second embodiment of the door locking means according to the present invention, and FIG. 12 is a control diagram in the second embodiment. The configuration diagram of the circuit, FIG. 13 is a flow chart showing the door opening operation in the second embodiment, and 14th ffi is the same as the second
Flowchart showing the door opening operation in the embodiment, No. 15
The figure is a configuration diagram showing a third embodiment of the door locking means according to 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. 2... Rotating drum, 2d... Small hole, 3... Drum door, 3b... Drum lock opening, 7... Door stopper, 9... Control circuit, 10... Drum position detection Container, 11° 11A, IIB...Door locking means, 12.
...Kuchin, 28...Brake. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] A rotating drum rotatably operated by a driving means within a casing; and a drum door slidably attached to the outer circumference of the rotating drum for opening and closing a drum opening provided on a peripheral wall of the rotating drum. , a door stopper provided on the drum door that locks or unlocks the drum door with respect to the rotating drum; a drum position detection means that detects a predetermined position in the rotational direction of the rotating drum; and the rotating drum. a door locking means that operates the door stopper to unlock the drum door and at the same time holds it in an immovable state relative to the casing when the drum door is moved to the door opening/closing position; a means for locking the rotating drum with a rotational drum; and a means for controlling the door locking means when opening and closing the drum door, and a rotating operation to a door opening/closing position for opening and closing the drum door with respect to the rotating drum, and a correct rotation from the door opening/closing position. 1. A door opening/closing device for a rotating drum, comprising: a control means for controlling a drum driving means to provide an opening/closing rotation operation of a predetermined angle in the direction or the opposite direction, and a control means for controlling the drum locking means.