JPH105485A - Drum type rotary processing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rise a drum on an intended vibration level by rotating the drum at balanced rotating speed at low speed rotation time by a control means, and rising the drum to high speed rotation when output of an unbalance detecting means is not more than a prescribed level. SOLUTION: A drum type washing machine has an acceleration sensor 20 as a vibration sensor to detect vibration of a water tub 2, and the acceleration sensor 20 is installed in an upper part of the water tub 2 so as to detect vibration of the water tub 2 which is orthogonal to the rotational center axis direction of a drum 3 and is in the horizontal direction to an installing surface of the washing machine. Therefore, the drum 3 rotates, and when unbalance is caused, since it swings every time when it rotates once, when this is seized as a vibration waveform, a deviation degree of a washing substance can be known. It is rotated at balanced rotating speed being rotating speed just before a washing substance sticks to an inner peripheral wall of the drum 3 at low speed rotation time of the drum 3, and is risen to high rotating speed when output of a speed sensor 20 is not more than a prescribed level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type rotary processing apparatus, and more particularly, to washing of cloth products such as clothes.
The present invention relates to a drum-type rotary processing apparatus applicable to a drum-type washing machine that performs dehydration (and may even perform drying), a drum-type dryer that performs only drying, and the like.

[0002]

2. Description of the Related Art According to a conventional drum type washing machine, during washing, the drum is rotated at a low speed at a speed at which the article can move inside the drum, and at the time of spin-drying, the article adheres to the inner surface of the peripheral wall of the drum. The drum was rotating at high speed. In such a control, there is a problem that abnormal vibration occurs when the processing object is unevenly distributed in the drum at the time of high-speed rotation, and various proposals have been made to solve this problem.

For example, Japanese Patent Publication No. 50-16099 has a detecting device for detecting the horizontal amplitude of a drum. At low speed rotation, the detecting device detects the amplitude of a water tank including the drum, and detects the amplitude. There is disclosed a drum type washing machine in which the drum is shifted to the high speed rotation only when the size of the drum is equal to or less than a predetermined value and continues for at least one cycle (one rotation) of the drum.

[0004] Also, Japanese Patent Application Laid-Open No. 3-86197 discloses that
The drum is preliminarily spin-dried at a rotation speed between the low-speed rotation during washing and the high-speed rotation during spinning, and the amount of change in the detection value output from the rotation speed detection means for detecting the rotation speed of the drum is preset. There is disclosed a drum type washing machine in which the drum is shifted to high speed rotation only when the value is equal to or less than the value.

[0005]

However, in the above-mentioned conventional invention, although the occurrence of abnormal vibrations can be greatly reduced, the abnormal vibrations cannot always be surely prevented. That is, in the former, the object to be processed is constantly rolling in the drum at the time of low-speed rotation, and the amplitude of the drum is not stable and constantly changes even during one rotation. Even if the drum is started to rotate at a high speed when the value is equal to or less than a predetermined value, it is unknown whether or not the drum shifts to the high speed rotation as it is. However, although there was a certain effect to prevent only the large abnormal vibration, it was not enough to further reduce the vibration.

Further, in the latter, during the pre-dehydration rotation, the object is rolled while adhering to or peeling off from the inner peripheral wall of the drum, so that the object almost adheres to the inner peripheral wall of the drum. Since the change in unbalance is detected at about one rotation at this rotation speed, the rotation is delayed by about one rotation at the time of startup to high-speed rotation, during which time the rotation of the workpiece is stopped. Movements occurred, and the drums did not always shift to high-speed rotation in good condition.

As described above, in the conventional apparatus, since the vibration of the drum is detected by the number of revolutions at which the object to be processed in the drum constantly rolls, even if the low vibration is detected, the drum is moved at high speed. It was unknown whether it could be turned to rotation. That is, there is a delay between the timing of determining whether the drum can be started up to high speed rotation and the timing of starting up the drum to high speed rotation. This delay changes the state of the object to be processed. There was a problem that it was not possible to shift to high-speed rotation at the vibration level.

[0008] The above problem is not limited to the drum type washing machine, but there is a similar problem in a drum type drying machine which performs only drying and other drum type rotary processing devices.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a drum type rotation processing apparatus which can start a drum at a high speed at an intended vibration level. To provide.

[0010]

According to a first aspect of the present invention, there is provided a drum rotatably supported in an outer frame and accommodating an object to be processed, rotation driving means for driving the drum to rotate, Control means for controlling the rotation driving means so that the drum is rotated at a low speed at a rotation speed at which the workpiece moves and then to high speed rotation; and an unbalance detection for detecting a deviation of the workpiece in the drum. Means, and the control means rotates the drum at a balance rotation number that is the number of rotations immediately before the entire workpiece is attached to the inner peripheral wall of the drum during low-speed rotation, Further, the drum type rotation processing device is characterized in that when the output of the unbalance detection means is equal to or lower than a predetermined level, the drum is started to rotate at a high speed.

According to a second aspect of the present invention, in the first aspect, there is further provided a support which is supported in the outer frame so as to be capable of vibrating and includes the drum.
A vibration detecting unit is provided on the support and detects vibration of the support in a direction orthogonal to the rotation center axis direction of the drum.The control unit rotates the drum at the balance rotation speed. The state in which the absolute value of the output of the vibration detecting means has become equal to or less than the reference value is a predetermined time A
A drum-type rotation processing device characterized in that the drum is started to rotate at a high speed when the rotation is continued.

A third aspect of the present invention is the drum type rotary processing apparatus according to the second aspect, wherein the control means changes the balance rotation number according to the amount of the object to be processed.

According to a fourth aspect of the present invention, in the second aspect, the output of the vibration detecting means is subjected to waveform processing by a low-pass filter of about 3 Hz.

According to a fifth aspect of the present invention, there is provided the drum type rotary processing apparatus according to the second aspect, wherein the predetermined time A is set to be equal to or longer than a half rotation of the drum and equal to or shorter than one rotation of the drum. .

A sixth aspect of the present invention is the drum type rotary processing apparatus according to the third aspect, wherein the control means changes the predetermined time A in accordance with the balance rotation speed.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a drum type rotary processing apparatus of the present invention is applied to a drum type washing machine will be described below in detail with reference to the drawings. FIG. 1 is a side view longitudinal sectional view showing a schematic structure of a drum type washing machine according to the present invention. The drum type washing machine includes a box-shaped outer frame 1 and a water tank 2 disposed in the outer frame 1 for storing washing liquid, rinsing water and the like.
And a drum 3 rotatably supported in the water tub 2 and containing laundry.

The drum 3 has a cylindrical shape with a diameter of about 46 cm, has a large number of small holes 3a all around its peripheral wall, and is provided in the water tank 2 via a horizontal shaft 6 projecting inward from the back wall. The bearing 7 is rotatably supported by the bearing 7. 8 is drum 3
And a pulley 9 is fixed to a rotating shaft of the drum motor. The pulley 9 is a drum drive pulley 1 fixed to a horizontal shaft via a drive belt 10.
Connected to 1.

Reference numeral 12 denotes a door provided on the front surface of the outer frame 1 and opens and closes for taking in and out laundry, and 17 denotes a drum 3
This is a rotation sensor for detecting the number of rotations. The rotation sensor 17 includes a reed switch 18 fixed to the outer rear surface of the water tank 2 and a magnet 1 fixed to the drum driving pulley 11 so as to face the reed switch 18.
9

The water tank 2 has a water supply pipe 4 for supplying water.
1, a circulation pipe 42 for circulating washing liquid and rinsing water,
It has a water storage tank 43 for circulating and storing the washing liquid and rinsing water, and a discharge port 44 for discharging the washing liquid and rinsing water. Further, an operation panel 45 provided with a power switch, a start switch, and the like is attached to a front surface of the outer frame 1.

The bottom surface of the water tank 2 is, as shown in FIG.
Supported by a shock absorber 4 that buffers vibrations,
Further, the water tank 2 is suspended by a spring 5 mounted on the upper side inside the outer frame 1 to buffer vibration. Therefore, the water tank 2 is supported in the outer frame 1 so as to be able to vibrate by the shock absorber 4 and the spring 5.

The drum type washing machine of the present embodiment has a vibration sensor for detecting vibration of the water tub 2. Specific examples of the vibration sensor include a displacement sensor that directly detects the amplitude of the water tank 2 and an acceleration sensor that uses a piezoelectric effect of a piezoelectric element such as quartz or ceramic that outputs an electric signal proportional to the acceleration applied to the water tank 2. Is mentioned. In the present embodiment, an acceleration sensor is employed.

As apparent from FIG. 2, the acceleration sensor 2
0 is attached to the upper part of the water tank 2 so as to detect vibration (amplitude horizontal component) of the water tank 2 in a direction perpendicular to the rotation center axis direction of the drum 3 and horizontal to the installation surface of the washing machine. I have. The amplitude horizontal component of the water tank 2 is indicated by an arrow in the figure.

The principle of the acceleration sensor 20 is as follows. A weight in the housing constituting the acceleration sensor 20 applies a force to the piezoelectric element by external vibration, and the stress of the piezoelectric element breaks the balance between positive ions and negative ions to generate electric charges. Charge is accumulated by the electrodes,
Finally, it is output as a vibration waveform through the vibration detection circuit. The amount of charge stored is proportional to the applied force, which is proportional to the acceleration.

FIG. 3 is a block diagram of a vibration detection circuit when an acceleration sensor is used as a vibration sensor. In FIG. 1, a signal output from an acceleration sensor 20 is amplified by an amplifier circuit 21, converted by a low-pass filter (hereinafter, a low-pass filter) 22, then amplified by an amplifier circuit 23, and output as a vibration waveform. You. FIG. 4 is a basic circuit diagram showing the low-pass filter of FIG. In the figure, 24 and 25 are input terminals to which the output of the acceleration sensor 20 is given, 26 is an operational amplifier, R1 is a resistor,
C1 is a capacitor, C2 is a feedback capacitor, and 27 is an output terminal.

The low-pass filter used in this embodiment is preferably about 3 Hz. That is, due to differences in the vibration characteristics of the vibrating body, for example, differences in the spring constant, the number of revolutions, and the rapid movement of the object to be processed, the vibration waveforms are significantly different, and it is necessary to perform the waveform processing so as to be applicable to any vibration system. Because there is.

Next, an electronic control circuit which is a control means of the drum type washing machine of the present embodiment will be described. As shown in FIG. 5, the electronic control circuit includes a CPU 100 including a control unit and a calculation unit, a data bus 101, a ROM and a RAM memory 102, an I / O interface 103, a rotation sensor 17, and an output of the rotation sensor 17. A rotation number detection circuit 104 for detecting the rotation number from the acceleration sensor 20, an acceleration sensor 20, a vibration detection circuit 105 for outputting a signal output from the acceleration sensor 20 as a vibration waveform, and setting and execution instructions for various processes such as washing and rinsing. And a drive circuit 107 for driving the drum motor 8.

Here, the drum 3 shown in FIGS.
Considering the case where the drum is rotating at a low speed, the vertical vibration is strongly affected by gravity, so that even if the amount of unbalance in the drum 3 is the same, the downward vibration is large and the upward vibration is small. Become. On the other hand, horizontal vibrations receive equal gravity in both the left and right directions, so that vibrations caused by imbalance in the drum 3 are much larger than the effects of gravity. Therefore, by detecting vibration in the horizontal direction orthogonal to the rotation center axis direction of the drum 3,
You can know how much the laundry is lean.

That is, as shown in FIG.
When the is rotated, the unbalanced portion moves left and right, causing a right and left swing. Therefore, if there is an unbalanced portion, the drum 3 swings once to the left and right during one rotation, and if this is captured as a vibration waveform, it is possible to know how much the laundry is offset. be able to.

FIG. 7A shows the output waveform of the acceleration sensor 20.
The horizontal axis represents time (seconds), and the vertical axis represents signal magnitude. . This indicates that applying one impact in one direction was repeated three times without rotating the drum 3, and a large number of amplitudes (a large number of amplitudes overlap in the figure) appeared instantaneously. ing. The output of the acceleration sensor 20 is applied to a 3 Hz low-pass filter (in the figure,
FIG. 7 (b) shows a waveform processed by LPF. It can be seen that the signal has converged in about 0.4 seconds.

Next, the case where the drum 3 is rotated at, for example, 83 rpm will be described. The time required for the drum 3 to make one rotation is 0.72 seconds. Therefore, when the waveform is processed by the low-pass filter of 3 Hz, one impact can be made to be affected by a signal generated by the impact for about 0.4 seconds, that is, while the drum 3 rotates about half a turn. In this manner, left and right vibrations based on imbalance during one rotation can be reliably detected.

FIG. 8 (a) shows an output waveform of the acceleration sensor 20 when an impact is applied in one direction at intervals of one time without rotating the drum 3 in the same manner as described above. FIG. 8B shows the acceleration sensor 20.
Is subjected to waveform processing by a low-pass filter of 3 Hz. FIG.
(A) shows an output waveform of the acceleration sensor 20 when applying one impact in one direction is repeated three times without rotating the drum 3 in the same manner as described above. FIG. 9B shows that the output of the acceleration sensor 20 is 1
The waveform is processed by a low-pass filter of Hz. As is clear from FIG. 9 (b), the vibration continues for about 1.2 seconds with one impact in one direction, and this time is
Was longer than the time required for one rotation, which was not preferable. Actually, the acceleration sensor 2 is a 3 Hz low-pass filter.
When the output of 0 was subjected to waveform processing, the output was synchronized with the actual amplitude of the water tank 2 including the drum 3.

Next, the operation of the drum type washing machine according to the present embodiment during the spin-drying process will be described with reference to the flowchart of FIG. First, in step 1 (S1), the drum 3
To rotate the drum 3 at low speed. Subsequently, in step 2 (S2), as shown in FIGS. 11A and 11B, the absolute value of the output of the acceleration sensor 20 waveform-processed by the 3 Hz low-pass filter is equal to or less than the reference value (P). It is determined whether or not the state continues for a predetermined period of time A if: And
If these conditions are satisfied (Y), step 3
Proceeding to (S3), the rotation of the drum 3 is accelerated, the drum 3 is rotated at a high speed, and the operation shifts to the dehydration operation.

On the other hand, if the above condition is not satisfied in step 2 (S2) (N), the process proceeds to step 4 (S4), and it is determined whether or not a predetermined time B (for example, 10 seconds) has elapsed since the start of drum rotation. If the time has elapsed (Y), the process proceeds to step 5 (S5), where the drum 3 is stopped.
Returning to (S1), the above operation is repeated. On the other hand, if the predetermined time B has not elapsed in step 4 (S4) (N), the process proceeds to step 6 (S6), and it is determined whether or not the drum rotation speed has reached the predetermined rotation speed (balance rotation speed). If the rotation speed of the drum has reached the predetermined rotation speed (Y), the rotation speed is maintained (S7) and step 1 (S7).
Returning to 1), the above operation is repeated. Step 6
If the drum rotation speed has not reached the predetermined rotation speed in (S6) (N), the process proceeds to step 8 (S8) to accelerate the rotation of the drum 3 to reach the predetermined rotation speed.
Returning to (S1), the above operation is repeated.

These steps described in the flowchart of FIG. 10 will be described with reference to the start-up charts of FIGS. These charts show the basic procedure of controlling the number of rotations of the drum based on the relationship between the number of rotations of the drum on the vertical axis and time on the horizontal axis. In particular, FIG. 13 shows the case of restart. Here, the balance rotation speed will be described. Now, 46c inside diameter
In a case where the object (cloth) is put into the drum 3 of m and rotated, for example, the acceleration of the mass point on the inner wall of the drum 3 is required to attach the object to the inner wall of the drum 3. The drum 3 must be rotated so that a is at least equal to the gravitational acceleration. The relationship between the rotation speed n, the peripheral speed v, and the acceleration a of the drum 3 is as follows when the radius of the drum 3 is represented by r. v = 2πrn (I) a = v ² / r (II) Here, if r = 0.23 m and a = 9.8 m / s ² , the rotation speed n becomes 63 rpm. However, this corresponds to the case where the object to be processed does not have a thickness, and is not realistic.

Therefore, description will be made in consideration of the thickness of the object to be processed. When the drum 3 starts rotating, the workpiece is pressed against the inner peripheral wall of the drum 3 by centrifugal force as shown in FIG.
A hollow is formed in the center of the drum 3. Therefore, when the acceleration of the mass point having the average inner diameter of the cavity is equal to or higher than the gravitational acceleration, if there is no imbalance, the entire workpiece is
Will be stuck to the inner peripheral wall. If there is an unbalanced portion, the acceleration of the mass of the convex portion shown in FIG. 6 becomes equal to or less than the gravitational acceleration, and the object can move (fall). Therefore, a part of the object to be processed at this mass point moves little by little without sticking to the inner peripheral wall of the drum 3, whereby the balance state changes. Therefore, the rotation speed of the drum 3 may be set so that the acceleration of the mass point having the average inner diameter is substantially equal to the gravitational acceleration, and the balance rotation speed is obtained.

For example, in order to make the acceleration of a mass having an average inner diameter of a cavity of 24 cm equal to the gravitational acceleration, from the above equations (I) and (II), the rotational speed n becomes 86 rpm, and
Similarly, when the inner diameter is 26 cm, the number of rotations n is 83
rpm. Actually, when the optimum balance rotation speed was obtained by an experiment, the result shown in FIG. 15 was obtained. That is, the balance rotation speed changes depending on the cloth amount (the amount of the object to be processed), and the balance rotation speed increases as the cloth amount increases. The drum 3 used in this experiment had a capacity of 6 kg.
(Inner diameter 46 cm).

Next, the predetermined time A will be described. If the predetermined time A is too short, there is a risk that the vibration signal may be determined to be small even when the vibration does not sufficiently converge, and large vibration may be generated even when the rotation speed is increased. Further, if the predetermined time A is too long, the timing of transition to high-speed rotation may be missed. As shown in FIG. 6, if the distribution of the cloth in the drum 3 is unbalanced, the water tank 2 containing the drum 3 swings right and left (horizontally) once during one rotation of the drum 3. , It is possible to judge whether the balance is unbalanced every half rotation. Therefore, the predetermined time A is at least
Takes half a turn. From the experimental results, it was found that half rotation to around one rotation is optimal. FIG. 16 shows the relationship between the cloth amount (the amount of the object to be processed) and the predetermined time A.

In FIG. 16, when the amount of cloth is 5 kg or 6 kg, the predetermined time A is shorter than the time required for the drum 3 to make a half turn, but a sufficiently low unbalance can be detected.
This is because, as the amount of cloth increases, the cavity formed in the center of the drum 3 becomes smaller due to the relationship with the capacity of the drum 3.
Even with the same amount of imbalance, the effect is reduced, and as a result, the allowable amount of imbalance increases. Therefore, the reference value (± P) can be increased. Actually, when processing is performed with the reference value (± P) fixed as in the case of the other cloth amounts, the adjustment is performed in the predetermined time A, so that the processing can be performed for a time equal to or less than a half rotation.

Subsequently, the case where the balance rotation speed and the predetermined time A are changed according to the amount of the object to be processed (the amount of cloth) will be described.
This will be described with reference to the flowchart of FIG. FIG.
In 7, the amount of cloth is first detected in step 21 (S21). The following two representative methods are used to detect the amount of cloth. One is to judge from the amount of water absorbed by the laundry. That is, the laundry is put into the rotatable drum, and the washing is started. At that time, when the water intake valve is opened, water is supplied from the upper part of the water tank, and the water level sensor detects a certain water level, the drum rotates. When the laundry absorbs water and the water level is lowered, the water level sensor detects this and opens the water absorption valve to supply water again. The amount of laundry is determined from the amount of water supplied at this time.

Another one is to put laundry in a rotating drum. Start the motor without water before washing and rotate the drum. While controlling the rotation, the drum is shifted to a high-speed rotation so that the laundry is uniformly attached to the inner peripheral wall of the drum by centrifugal force. After the drum rotation is continued for a predetermined time, the power supply to the motor is stopped. The time from the stop of energization to the stop of the drum is long when the amount of cloth is large,
Short when the amount of cloth is small. The cloth amount is detected by utilizing the fact that the difference in the stop time is proportional to the cloth amount. In the present embodiment, the latter method is adopted.

As described above, step 21 (S21)
After the cloth amount is detected in step 22, the optimum balance rotation speed is calculated from FIG. 15 and the optimum predetermined time A is calculated from FIG. 16 based on the cloth amount detected in step 22 (S22). Rewrite the data at time A. Then, under the condition of the rewritten balance rotation speed and the predetermined time A, the process proceeds to the dehydration process, and the operation is performed according to the flowchart of FIG.

In this embodiment, a drum type washing machine for performing washing and dehydration has been described.
It is needless to say that the present invention can be applied to a drum-type washer for drying, a drum-type dryer for drying only, or a drum-type rotary processing apparatus of another type. Further, in the present embodiment, the case of a single-axis support, front-loading type drum type rotary processing apparatus has been described, but the present invention can be applied to a two-axis support type and a top-loading type. it can.

[0043]

According to the first aspect of the present invention, since the low unbalance state is determined while correcting the imbalance in the drum based on the number of rotations of the balance, the correlation with the high speed rotation becomes high, and the vibration with low vibration is reduced. It can start up at high speed. It is possible to reduce imbalance due to the offset of the object to be processed, and as a result, vibration is reduced, and the weight of the apparatus can be reduced.

According to the second aspect of the present invention, as the unbalance detecting means, the vibration detecting means for detecting the vibration in the direction orthogonal to the direction of the rotation center axis of the drum among the vibrations of the support supporting the drum is used. When the detected vibration is converged and becomes equal to or less than the reference value for a predetermined time A, it is determined that the imbalance is low imbalance, so that a high-speed rotation with less vibration can be started.

According to the third aspect of the present invention, the balance rotation speed is changed to an optimum value according to the amount of the object to be processed.
Finer control is possible, and a better start-up to high-speed rotation is possible.

According to the fourth aspect of the present invention, the output of the vibration detecting means is subjected to waveform processing by the low-pass filter, thereby removing noise and facilitating signal processing. further,
By using a low-pass filter of about 3 Hz, a similar startup determination can be performed for different vibration systems, and an appropriate startup determination can be performed.

According to the fifth aspect of the present invention, it is possible to quickly start up without overlooking the timing of starting up to high-speed rotation.

According to the sixth aspect of the present invention, the predetermined time A is changed to an optimum value in accordance with the balance rotation speed, so that finer control can be performed, and a more favorable high-speed start-up can be achieved. it can.

[Brief description of the drawings]

FIG. 1 is a side sectional vertical view of a drum type washing machine according to an embodiment of a drum type rotation processing apparatus of the present invention.

FIG. 2 is a schematic longitudinal sectional view of the drum type washing machine of FIG. 1 as viewed from the front.

FIG. 3 is a block diagram of a vibration detection circuit.

FIG. 4 is a basic circuit diagram of a low-pass filter.

FIG. 5 is a block diagram of an electronic control circuit.

FIG. 6 is a schematic diagram showing a relationship between an unbalanced portion of a workpiece and vibration.

7A is an output waveform diagram of the acceleration sensor when an impact is applied without rotating the drum, and FIG. 7B is a vibration waveform diagram when the output of FIG. It is.

8A is an output waveform diagram of the acceleration sensor when an impact is applied without rotating the drum, and FIG. 8B is a vibration waveform diagram when the output of FIG. It is.

9A is an output waveform diagram of the acceleration sensor when an impact is applied without rotating the drum, and FIG. 9B is a vibration waveform diagram when the output of FIG. It is.

FIG. 10 is a flowchart showing an operation of the drum-type washing machine during a spin-drying process.

FIGS. 11A and 11B are explanatory diagrams showing how to obtain a reference value and a predetermined time A from a vibration waveform waveform-processed by a low-pass filter, and a timing of startup.

FIG. 12 is a chart showing a control pattern of a rotation speed of a drum.

FIG. 13 is a chart showing a control pattern of a rotation speed of a drum.

FIG. 14 is a schematic diagram showing a state of an object to be processed during rotation of a drum, particularly a hollow portion at a central portion.

FIG. 15 is a graph showing a relationship between a cloth amount and a balance rotation speed.

FIG. 16 is a graph showing a relationship between a cloth amount and a predetermined time A;

FIG. 17 is a flowchart showing an operation in a case where a balance rotation speed and a predetermined time A are changed in accordance with an amount of an object to be processed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer frame 2 Water tank 3 Drum 3a Small hole 6 Horizontal axis 7 Bearing 8 Drum motor 9 Pulley 10 Drive belt 11 Drum drive pulley 12 Door 17 Rotation sensor 18 Reed switch 19 Magnet 20 Acceleration sensor 41 Water supply pipe 42 Circulation pipe 43 Water storage tank 44 Drainage port 45 Operation panel

Claims (6)

[Claims] 1. A drum rotatably supported in an outer frame and containing an object to be processed, rotation driving means for driving the drum to rotate, and rotating the drum at a rotational speed at which the object moves in the drum. A drum-type rotation processing apparatus including a control unit that controls the rotation driving unit so as to shift to a high-speed rotation after a low-speed rotation, and an unbalance detection unit that detects a deviation of the workpiece in the drum. The control means rotates the drum at a balance rotation number, which is the rotation number immediately before the entire object to be processed is stuck to the inner peripheral wall of the drum at the time of low-speed rotation, and furthermore, the output of the unbalance detection means is a predetermined number. A drum type rotation processing apparatus wherein the drum is started at a high speed when the level is equal to or lower than the level. 2. The apparatus according to claim 1, further comprising: a support member that is supported in the outer frame so as to be capable of vibrating and includes the drum. The imbalance detecting unit is installed on the support member, and the rotation center axis of the drum. A vibration detecting means for detecting the vibration of the support in a direction perpendicular to the direction, the control means rotates the drum at the balance rotation speed,
2. The drum type rotation according to claim 1, wherein the drum is started to rotate at a high speed when a state in which the absolute value of the output of the vibration detection means becomes equal to or less than a reference value continues for a predetermined time A. Processing equipment. 3. The drum type rotary processing apparatus according to claim 2, wherein said control means changes said balance rotational speed according to the amount of the object to be processed. 4. The drum type rotary processing apparatus according to claim 2, wherein the output of said vibration detecting means is subjected to waveform processing by a low-pass filter of about 3 Hz. 5. The drum type rotation processing apparatus according to claim 2, wherein the predetermined time A is set to be equal to or longer than a half rotation of the drum and equal to or shorter than one rotation of the drum. 6. The drum type rotation processing apparatus according to claim 3, wherein the control unit changes the predetermined time A according to the balance rotation speed.