JPH10263261A - Drum type rotary processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress even large vibration in a short time by raising the number of rotations of a drum, capturing the output signals of a front and back unbalance detection means when an object to be processed is about to be stuck to the drum and accelerating the rotation of the drum to a target rotation number in the case that the value is less than a prescribed value. SOLUTION: At the time of the dehydrating process of a drum type washing machine, the drum 3 is rotated with a first number of rotation as a target first and whether or not prescribed time elapses after rotation start is judged. Then, in the case that the prescribed time elapses, from the output waveform of a vibration detection means 20, whether or not the size is less than the prescribed value and whether or not the state is continued for the prescribed time are judged, and in the case of YES, acceleration is performed with a second number of rotations as the target. Then, whether or not the prescribed time elapses after acceleration start is judged, whether or not the size is less than the prescribed value is judged from the output of the vibration detection means 20 in the case that the prescribed time elapses and the acceleration is performed with a third number of rotations as the target in the case of YES, Then, in the case that the size is less than the prescribed value from the output of the vibration detection means 20, the acceleration is performed with a forth number of rotations as the target.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type washing machine for washing and dehydrating (and sometimes drying) cloth products such as clothes, and a drum type drying machine for merely drying. The present invention relates to a drum-type rotation processing apparatus that rotates laundry.

[0002]

2. Description of the Related Art As is well known, in a drum type rotary processing apparatus of this type, for example, a drum type washing machine, the drum is rotated at a low speed at the speed at which the object moves during washing, and the drum is rotated at the speed of spinning during dehydration. Control is performed to rotate the drum at a high speed at a speed that does not fall down by sticking to the inner surface of the surrounding wall.However, if the workpiece in the drum is unevenly distributed during high-speed rotation, abnormal vibration occurs, and this problem is solved. There have been many proposals to do so.

[0003] For example, Japanese Patent Publication No. 50-16099 has a detecting device for detecting the horizontal amplitude of a drum. The detecting device detects the amplitude of a water tank including a drum at a low speed rotation, 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 is equal to or less than a predetermined value and continues for at least one cycle (one rotation) of the drum.

In Japanese Patent Publication No. 49-9506,
The number of rotations at which the laundry rolls, the horizontal vibration amplitude of the drum is less than a predetermined value, and when the position where the laundry is unevenly distributed comes to a predetermined position, that is, the vertical vibration amplitude is more than a predetermined value. A drum type washing machine in which a drum is sometimes shifted to a high speed rotation is disclosed.

Japanese Unexamined Patent Publication (Kokai) No. 51-144077 discloses that the unbalance of a water tank is detected by measuring the characteristics of a motor and is set to be higher than the rotation speed at the time of measurement. 75 to 9 which is larger than the minimum number of revolutions at which the toner adheres to the surface of the drum during rotation of the drum.
It is disclosed to be 5 rpm.

[0006]

In the drum type washing machine as described above, the one described in Japanese Patent Publication No. Sho 50-16099 discloses that the object to be processed is constantly rolling in the drum during low speed rotation. However, since the amplitude of the drum is not stable and constantly changes during one rotation, even if the drum is started at a high speed when the amplitude becomes less than a predetermined value,
In some cases, the object moves before the object sticks to the drum, and the state of imbalance changes. In addition, although there was a certain effect to prevent only a large abnormal vibration, it could not be applied to lower the vibration.

[0007] Further, the apparatus described in Japanese Patent Publication No. 49-9506 has the same problem as described above because the startup is determined by the number of revolutions at which the laundry rolls. In addition, when the determination is made only on the positive side output, a large output may be output on the negative side even if the output on the positive side is small, and an erroneous determination may be made. Further, when the judgment is made based on some average values of the positive side output as in another embodiment, the output is not stabilized because it is detected based on the number of rolling revolutions, and a state that satisfies a predetermined condition is not satisfied. There were times when it was difficult to obtain.

The motor disclosed in Japanese Patent Application Laid-Open No. 51-144077 measures motor characteristics due to unbalance after a predetermined time after a predetermined number of revolutions is reached, and judges from the measured value. There is a certain rotation speed of 7
Even if the rotation speed is 5 to 95 rpm, if the number of revolutions is too low compared to the laundry, the laundry moves, so that the measured value is not stable, and the same as in the above example. On the other hand, if the predetermined number of revolutions is set to a high value in the range of 75 to 95 rpm, and the measurement is performed after the laundry is attached to the drum, the laundry does not move. It is a waste of time to make the determination.

[0009] The above problem is not limited to the drum type washing machine, but the same problem occurs 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 problems, and has as its object to provide a drum such as a drum type washing machine which can start up the drum at a high speed rotation at an intended vibration level. An object of the present invention is to provide a rotary processing apparatus. In short, since the imbalance state is fixed at the moment when the laundry sticks to the drum, the imbalance state at this time is detected, and it is determined whether or not to accelerate the rotation of the drum.

[0011]

SUMMARY OF THE INVENTION A drum type rotary processing apparatus according to the present invention has been made in order to achieve the above object.
Invention according to claim 1, go increasing the rotation speed of the drum to target a predetermined low-speed rotation speed N _1, just the output signals before and after the imbalance detection means when the object to be processed is going Haritsuko the drum And the rotation of the drum is accelerated to a second target rotation speed when the value is equal to or less than a predetermined value α ₁ and the state continues for a predetermined time t ₁₀ .

[0012] According to a second aspect of the invention, relates to do if imbalance is large, and stops in the invention of claim 1, wherein, when it exceeds a predetermined value alpha _1, immediately the rotation of the drum, the treated rotates in the opposite direction at a rotational speed N ₀ of the low-speed capable tumbling, after balance correction, is obtained so as to determine as claimed in claim 1, wherein in forward rotation again.

[0013] The third aspect of the present invention provides the first aspect.
In the invention described, it is obtained so as to determine whether to increase the rotational speed than the resonance point at the resonance point below the drum rotational speed N _2. And also, an invention according to claim 4, wherein, in the invention according to the first aspect, the magnitude of the vibration in the rotational speed N ₃ of the above resonance point of the drum, in which so as to determine whether to continue accelerating anyway .

Further, the invention according to claim 5 is for excluding a case where the number of rotations is not sufficient. In the invention according to claim ₁ , the range of the predetermined time t1 from the start of rotation of the drum is unbalance detection. captures the signal means, the value is obtained so as not to accelerate the rotation of the drum be less than or equal to the predetermined value alpha ₁ to the second target rotation number. Further, the invention according to claim 6 is the invention according to claim 1, wherein a liquid balancer for reducing vibration during high-speed rotation of the drum is provided.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a drum type rotary processing apparatus according to the present invention is applied to a drum type washing machine will be described below with reference to the drawings.

FIG. 1 is a side sectional view showing a schematic structure of a drum-type washing machine according to the present invention. The drum-type washing machine is provided with a box-shaped outer frame 1 and a washing machine disposed in the outer frame 1. A water tank 2 for storing liquid for use, rinsing water, and the like, and a drum 3 rotatably supported in the water tank 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 rotatable by a bearing 7 provided in the water tank 2 via a horizontal shaft 6 protruding from the back wall. Supported.

Reference numeral 8 denotes a drum motor as a rotation driving means for rotating the drum 3, and a pulley 9
Is fixed. The pulley 9 is connected via a drive belt 10 to a drum drive pulley 11 fixed to the horizontal shaft 6. Reference numeral 12 denotes a door provided on the front surface of the outer frame 1 and opened and closed to take in and out laundry.

Reference numeral 17 denotes a rotation sensor for detecting the number of rotations of the drum 3. A reed switch 18 fixed to the outer surface of the water tank and a magnet 19 fixed to the drum driving pulley 11 to face the reed switch 18 are provided. Consists of This rotation sensor is a known one, and a detailed description is omitted.

The water tank 2 has a water supply pipe 41 for supplying water,
It has a circulation pipe 42 for circulating the washing liquid and rinsing water, a water storage tank 43 for circulating and storing the washing liquid and rinsing water, and an outlet 44 for discharging the washing liquid and rinsing water. An operation panel 45 such as a power switch and a start switch is provided on the front surface of the outer frame 1.

The drum type washing machine is provided with vibration detecting means having a vibration sensor for detecting vibration of the water tub 2. The vibration detecting means is an example of the unbalance detecting means. The vibration caused by the imbalance occurs due to uneven distribution of the object to be processed.

Since the unevenly-disposed workpiece rotates with the rotation of the drum 3, the horizontal movement of the water tank 2 causes the water tank 2 to swing to the left when moving to the left and to swing to the right when moving to the right. . That is, if there is an imbalance, the drum 3 swings right and left once during one rotation, so that it can be grasped as a vibration waveform.

FIG. 2 is a structural view showing a mounting position of the vibration detecting means, and shows that the vibration detecting means 20 is mounted so as to detect a horizontal component of the vibration of the water tank 2 which is parallel to the rotation direction of the drum 3. ing. In addition, a shock absorber 4 that buffers vibration, which cannot be represented in FIG. 1 in FIG. 2, supports the bottom surface of the water tank 2, and a spring 5 that buffers vibration is provided so as to suspend the water tank 2. I have. 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.

Examples of the vibration sensor 20 include a displacement sensor that directly detects the amplitude of the water tank 2 and a piezoelectric effect of a quartz or ceramic piezoelectric element that outputs an electric signal proportional to the acceleration applied to the water tank 2. Acceleration sensors. In the present embodiment, an acceleration sensor is employed.

The principle of the acceleration sensor is as follows. The weight in the housing constituting the vibration sensor 20 applies a force to the piezoelectric element by external vibration, and the piezoelectric element loses the balance between positive ions and negative ions due to the stress, and generates electric charges. The charges are stored in the electrodes and finally output through the 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 detecting circuit when the vibration sensor is an acceleration sensor.
The signal output from the acceleration sensor 20
After being amplified by the low pass filter 22, the signal is further amplified by the amplifier circuit 23 and output as a vibration waveform.

FIG. 4 shows a basic circuit of a low-pass filter. In the figure, 24 and 25 are input terminals to which the output of the sensor 20 is given, 26 is an operational amplifier, R1
Is a resistor, C1 is a capacitor, C2 is a feedback capacitor, 2
7 is an output terminal. The low-pass filter is, for example, a filter of about 10 Hz. That is, since the vibration waveform is greatly different due to a difference in vibration characteristics of the vibrating body, for example, a difference in a spring constant, a rotation speed, and a fast movement of the object to be processed, the waveform processing should be performed so as to be applicable to any vibration system. I just need.

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 outputs from the rotation sensor 17. A rotation speed detection circuit 104 for detecting a rotation speed, a vibration detection means 20 including a vibration detection circuit, an A / D converter 105 for converting an output of the vibration detection means 20 into a digital amount, setting of various processes such as washing and rinsing, and the like. It has a key input unit 106 for giving an execution instruction, a drum motor 8, a drive circuit 107 for driving the drum motor 8, and the like.

Here, the rotation speed N ₁ will be described.
Now, taking as an example a case where an object to be processed (cloth) is put in a drum having an inner diameter of 46 cm and rotated, in order to stick the object to be processed to the inner peripheral wall of the drum, the material on the inner surface of the peripheral wall of the drum 3 is required. Must be rotated so that the acceleration α of the drum 3 is at least equal to or higher than the gravitational acceleration. The relationship among the rotation speed n, the peripheral speed v, and the acceleration α of the drum 3 is as follows: when the radius of the drum 3 is represented by r, v = 2πrn / 60 and α = v ² / r. Now, assuming that r = 0.23 m and α = 9.8 m / s ² , the rotational speed n is 63 rpm. This is equivalent to the case where the object to be processed has no thickness and is not realistic.

Next, description will be made in consideration of the thickness of the object to be processed. When the drum 3 starts rotating, the object is pressed against the peripheral wall of the drum 3 by centrifugal force, and a cavity is formed in the center of the drum 3. Therefore, if the acceleration of the mass point of the inner diameter of the cavity is equal to or higher than the gravitational acceleration, the entire object to be processed will stick to the peripheral wall of the drum 3. If the acceleration of the mass point is lower than the acceleration of gravity, the mass point moves (falls).

Therefore, it is sufficient to set the rotational speed of the drum according to the position where the mass point is set. For example, in order to make the acceleration of the mass point having an inner diameter of 24 cm in the drum 3 equal to the acceleration of gravity, the rotation speed n is set to 86 rpm from the above equation, and the rotation speed n is set to 90 rpm for the same 22 cm. Similarly, in the case of 20 cm, the rotational speed n becomes 95 rpm, and in the case of 18 cm, the rotational speed n becomes 100 rpm.

In this embodiment, the inner diameter of the drum 3 is set to 4
As 6 cm, the rotational speed N ₁ was 95 rpm. As shown in FIG. 8, the rotation speed of the drum 3 at the start of rotation is not immediately stabilized at the target rotation speed of 95 rpm, but is
It gradually shifts from 95 rpm to 95 rpm. Therefore, even if the set rotation speed is 95 rpm, the rotation speed in this range is actually covered.

Next, the rotation speed N ₂ will be described. Because it aims to detect the magnitude of the unbalance in a state in which the whole object to be treated was affixed to the inner wall of the drum 3 after the rotational speed N _1, of course revolution speed N ₂ is to be higher than N ₁ . On the other hand, when the rotation speed of the drum reaches a resonance point due to the vibration characteristics of the vibrating body, a resonance phenomenon occurs, and the vibration becomes particularly large. Thus, the rotational speed N ₂ is intended to be less than the rotational speed vibration co. In this embodiment, since the resonance point as shown in FIG. 3 in 250 rpm, the rotational speed N ₂ 220
rpm.

Next, the operation of the drum type washing machine in the spin-drying step will be described with reference to the flowchart of FIG.

[0034] First, the drum 3 rotates accelerate the rotational speed N ₁ to the target in step # 10. Step # 20 whether the predetermined time t ₁ has elapsed from the start of rotation with how to determine. The predetermined time t ₁ is a waiting time provided to eliminate a case where the rotation of the drum 3 is insufficient. For example, as shown in FIG. 8, the rotation speed of the drum 3 at the start of rotation takes less than 4 seconds to increase to near a predetermined rotation speed. Therefore, t ₁ is determined assuming this period.

The vibration waveform at this time will be described with reference to FIG. 7. The rotation starts after about 1 second, and the large output after about 2 seconds is due to the drop of the object. Then, it is almost dispersed in about 4 seconds while being dispersed on the peripheral wall of the drum 3, and has a periodic vibration waveform. Therefore, if the determination is made based on the waveform states before and after this time, the determination can be made at the beginning of the state of the sticking.

At step # 20, a predetermined time t from the start of rotation
_{If one} elapses, in step # 30, the vibration detecting means 20
Its size from the output waveform of the condition at the predetermined value alpha ₁ below, it is determined whether or not continued for a predetermined time t _10. Note that it is the predetermined time t _10, for example time the drum at least one revolution. For example, if the area surrounded by the rectangular frame as shown in FIG. 9, to accelerate the rotational speed N ₂ of the drum 3 to the target in step # 40.

[0037] Then, if the predetermined time t ₄ has elapsed from the start of acceleration if it is determined whether at step # 50, if passed,
Step # its size from the output of the vibration detecting means 20 to 60 determines whether a ₂ less than the predetermined value alpha. And
If it is equal to or smaller than the predetermined value α ₂ , the drum 3 is accelerated in step # 70 with the rotation speed N ₃ as a target.

Then, in step # 80, the vibration detecting means 2
Output from the magnitude of the 0 determines whether less than a predetermined value alpha _3. If it is equal to or smaller than the predetermined value α ₃ , the drum 3 is accelerated in step # 90 with the rotation speed N ₄ as a target. An outline of this process is shown in the startup basic chart of FIG.

In step # 30, the vibration detecting means 20
Has a predetermined value α ₁ as shown in FIG.
Is exceeded, it is determined whether or not a predetermined time t ₂ (for example, 6 seconds) has elapsed from the start of rotation in step # 100. If it has elapsed, the rotation of the drum 3 is stopped in step # 110. # rotate the rotational speed N ₀ in the target drum 3 in the opposite direction at 120.

The target rotation speed N ₀ is a rotation speed at which the object can be tumbled. For example, 60 rpm. Step # 130 to determine whether the predetermined time t ₃ has elapsed from start of the reversal. The predetermined time t ₃ is, for example, 5 seconds. The rotation of the drum is stopped at step # 140 if the predetermined time t ₃ has elapsed, and repeats the same operation as the process returns to step # 10 again. FIG. 11 is a start-up repetition chart schematically illustrating this process.

Further, if exceeded a predetermined value alpha ₂ in step # 60 to repeat the same operation as the process returns to step # 110. Furthermore, if exceeded a predetermined value alpha ₃ in step # 80 to repeat the same operation as the process returns to step # 110.

Next, as another embodiment, a case where a liquid balancer is attached to the drum type washing machine of the present invention will be described.

In FIG. 1, a hollow annular liquid balancer 50 is provided on the outer periphery of the drum 3. A liquid 51 such as salt water, glycerin or the like is injected into the liquid balancer 50 in a flowable amount, for example, 1 [l]. The liquid 51
Occupies a part of the internal space of the hollow annular liquid balancer 50, and can freely flow through a plurality of resistors provided inside the liquid balancer 50.

When the drum 3 is rotating at a high speed, the phase of the eccentric load in the drum 3 is delayed by 180 °, so that the eccentric load acts so as to cancel the eccentric load, thereby reducing the vibration during the high-speed rotation. However, when the liquid balancer is provided, such an effect cannot be expected at a low rotation speed below the resonance point, and the uneven load of the drum 3 may be increased.
As a result, it is difficult to completely determine the imbalance caused by the object at low speed rotation.

However, as in the above-described embodiment, after the rotation is always stopped, the drum 3 is rotated to make a primary determination.
In addition, by making the liquid in the liquid balancer substantially uniformly dispersed in the secondary determination and then determining whether or not to accelerate beyond the resonance point, the startup determination can be performed in the same manner as a drum type washing machine without a liquid balancer. It was done. That is, with the above-described start-up method, start-up determination was possible regardless of the presence or absence of the liquid balancer.

In the embodiment of the present invention, a case of a drum type washing machine for washing and dewatering has been described. However, the present invention relates to a drum type washing and drying machine for washing, dehydrating and drying, and a drum type washing and drying only drum type. The present invention can also be applied to a dryer or another type of drum type rotary processing device.

Also, in this embodiment, a one-axis support,
Although the case of the drum-type rotary processing apparatus of the front loading type has been described, the present invention can be applied to a two-axis support type or a top loading type.

[0048]

Since the drum type rotary processing apparatus of the present invention has the above-described configuration, the invention according to the first aspect is characterized in that the imbalance state is fixed at the moment when the laundry is stuck to the drum, so that the predetermined state can be obtained. of go slow rotational speed N ₁ at the target to increase the rotational speed of the drum, just by the object to be processed to detect the state of imbalance when trying Haritsuko the drum, determined promptly, the start-up it can. In addition, when the imbalance is large, the object to be processed is not stuck on the drum for a long time, so that a large vibration caused by the imbalance can be stopped in a short time.

Further, according to the invention of claim 2, the predetermined value α ₁
If exceeded, immediately stop the rotation of the drum, is rotated in the opposite direction at a rotational speed N ₀ of the low speed the treatment object can be tumbling, for performing balance correction, when imbalance is large, as it is long object to be processed Since there is no longer sticking to the drum, a large vibration caused by this imbalance can be stopped in a short time. In addition, the lump of the object to be processed is easily loosened by the reversal, which is effective in eliminating imbalance.

[0050] Then, an invention according to claim 3, wherein, by determining whether to increase the rotational speed than the resonance point at the resonance point below the drum rotational speed N _2, a high speed of more than the resonance point more reliably low vibration It is something that can be launched.

According to the fourth aspect of the present invention, the object to be processed is dehydrated by judging whether or not to continue accelerating from the magnitude of the vibration at the rotation speed N ₃ of the drum equal to or higher than the resonance point. Even if the imbalance changes in the process and the vibration increases, it is possible to take measures such as stopping the rotation of the drum.

Further, the invention according to claim 5 captures the signal of the unbalance detecting means in the range of the predetermined time t ₁ from the start of rotation of the drum, and rotates the drum even if the value is less than the predetermined value α _1. Is not accelerated to the second target number of revolutions, thereby eliminating the period during which the rotation of the drum is insufficient, so that the primary determination can be made before and after the object is about to stick to the drum. is there.

Further, in the invention according to claim 6, a liquid balancer is provided on the drum in order to further reduce the imbalance at the time of high-speed rotation, and the problem of the unbalance determination at low speed caused by the liquid balancer is achieved by the above means. As a result, the imbalance at the time of high-speed rotation is further reduced.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a schematic structure of a drum type washing machine showing an embodiment of a drum type rotation processing apparatus of the present invention.

FIG. 2 is a configuration diagram of an installation position of a vibration detection unit of the drum type washing machine, showing an embodiment of the drum type rotation processing apparatus of the present invention.

FIG. 3 is a block diagram of a vibration detection circuit in a case where the vibration detection means is an acceleration sensor in the drum type washing machine according to the embodiment of the drum type rotation processing apparatus of the present invention.

FIG. 4 is a basic circuit diagram of a low-pass filter of a drum type washing machine showing an embodiment of a drum type rotation processing device of the present invention.

FIG. 5 is a block diagram of an electronic control circuit of the drum type washing machine showing an embodiment of the drum type rotation processing apparatus of the present invention.

FIG. 6 is a schematic diagram of a start-up basic chart of a start-up step in a dehydration step of a drum-type washing machine showing an embodiment of a drum-type rotary processing apparatus of the present invention.

FIG. 7 is an explanatory diagram of an example of a vibration waveform at the time of a primary determination and an example of a start-up determination range in a drum-type washing machine according to an embodiment of the drum-type rotation processing apparatus of the present invention.

FIG. 8 is an explanatory diagram illustrating an example of a change in the number of rotations of the drum type washing machine according to the embodiment of the present invention at the start of rotation of the drum in the drum type washing machine.

FIG. 9 is an explanatory diagram of a case in which the primary determination can be started and an example of a vibration waveform thereof in the drum type washing machine showing the embodiment of the drum type rotation processing apparatus of the present invention.

FIG. 10 is an explanatory diagram of an example of a case in which the primary determination cannot be started and a vibration waveform thereof in the drum type washing machine showing the embodiment of the drum type rotation processing device of the present invention.

FIG. 11 is a schematic diagram of a basic chart of a repetition of a start-up process when a primary determination is impossible in a drum-type washing machine showing an embodiment of a drum-type rotation processing device of the present invention.

FIG. 12 is a flowchart showing an operation of the drum type washing machine according to the embodiment of the present invention at the time of a spin-drying process of the drum type washing machine.

FIG. 13 is an explanatory diagram showing a resonance point of the drum type washing machine showing the embodiment of the drum type rotation processing apparatus of the present invention and showing the relationship between the number of rotations and the vibration acceleration.

[Explanation of symbols]

 2 Water tank 3 Drum 8 Drum rotation motor 17 Rotation sensor 20 Vibration detection means 22 Low pass filter 50 Liquid balancer 51 Liquid

Claims (6)

[Claims] 1. A supporting member supported in a vibrating manner in an outer frame, a drum rotatably supported by the supporting member and accommodating an object to be processed, and a plurality of rotation speeds from a low speed rotation to a high speed rotation are set. In a drum type rotary processing apparatus including a controllable drum rotation speed variable means, a drum reversing means, and an unbalance detection means for detecting uneven distribution of an object to be processed in a drum, a predetermined low speed rotation speed N ₁ is set. go increasing the rotation speed of the drum, captures the output signal of the unbalance detecting means before and after when the object to be processed is going Haritsuko the drum, the rotation of the drum when the value is a predetermined value alpha ₁ below A drum type rotation processing device, wherein the rotation speed is accelerated to a second target rotation speed. 2. The drum-type rotary processing apparatus according to claim 1, wherein when the predetermined value α ₁ is exceeded, the rotation of the drum is immediately stopped, and the object is tumbled at a low rotational speed N ₀ at which the object can be tumbled. A drum-type rotation processing device, wherein the drum type rotation processing device is rotated in the forward direction after the balance is corrected. 3. The drum type rotation processing apparatus according to claim 1, wherein it is determined whether or not to increase the rotation speed above the resonance point at the drum rotation number N ₂ below the resonance point. apparatus. 4. A drum-type rotary processing apparatus according to claim 1, wherein it is determined whether or not to continue acceleration as it is from the magnitude of the vibration at a rotational speed N ₃ of the drum equal to or higher than the resonance point. Rotation processing device. 5. The drum type rotation processing apparatus according to claim 1, wherein a signal of the unbalance detecting means is captured in a range of a predetermined time t ₁ from the start of rotation of the drum, and a value thereof is not more than a predetermined value α _1. The rotation of the drum is not accelerated to the second target rotation speed. 6. The drum-type rotary processing apparatus according to claim 1, wherein a liquid balancer for reducing vibration is provided on the drum.