JP3331234B2 - Method for preventing entanglement of long laundry in tumble dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for discharging long laundry such as sheets from a rotary dryer having an inner body which rotates in one direction or reciprocates around a horizontal axis. Things.

[0002]

2. Description of the Related Art Conventional methods for drying (conditioning) and discharging laundry by a tumble dryer are shown in FIGS. 6 and 7. FIG. First, put the laundry into the inner body of the tumble dryer,
The inner body is rotated in one direction while sending dry air with a blower, or is reciprocated (shaked) to dry the laundry until a predetermined moisture content is obtained. The time of the drying step is set by a timer, and the rotation of the inner body is stopped by the time-up, and the blower for the dry air is also stopped. Next, enter the discharge process, first wait for a predetermined time after giving the rear door open command, and then wait for a predetermined time after giving the inner body tilt command, and the laundry in the inner body is transferred from the rear door onto the conveyor belt. The inner trunk is slightly tilted to be discharged. Next, the laundry is reciprocated in the same operation as that for shaking, that is, in one-way rotation or in a cycle of stopping normal rotation and stopping reverse rotation by the timer T, so that the laundry is rolled (twisted) off the inner body. And discharge. The time of one-way rotation or reciprocating rotation of the inner body in a state where the inner body is tilted is also timer-controlled, and the rotation or rotation of the inner body is stopped by a time-up signal, and the inner body is leveled. Return, close the rear door, open the front door, and complete preparations for receiving the next laundry.

[0003]

Long laundry, such as sheets, is washed, dehydrated, and generally dried by the above-described rotary dryer until a desired moisture content is obtained, and then planarized by an ironer. Finish. In a normal operation, a plurality of sheets are simultaneously put into a rotary dryer and dried. In an ironer, the sheets are processed one by one. Therefore, it is necessary to put the laundry coming out of the tumble dryer into the ironer in a state where the laundry is separated and spread by hand, but when the laundry is discharged from the tumble dryer in a state of being entangled, In addition, there is a problem that a small amount of moisture remains, and it is difficult to separate long laundry such as sheets one by one, which greatly reduces work efficiency.

In particular, in recent years, a machine has been used in which sheets are spread and put into an ironer simply by holding both ends of the sheets to clamps by hand, so that it is very difficult to discharge long laundry from a rotary dryer in a straightforward manner. Has become an important issue. Accordingly, it is an object of the present invention to provide an operation control method that discharges long laundry such as sheets from a tumble dryer without entanglement.

[0005]

According to the present invention, there is provided a method for preventing a long laundry from being entangled in a rotary dryer, comprising an inner body 2 reciprocally rotatable around a horizontal axis, and an inner body 2 after a drying process is completed.
In a rotary dryer that discharges laundry while reciprocatingly rotating the inner body 2 in a state where the inner body 2 is inclined in the discharge direction, after the inner body 2 is inclined as described above, the inner body 2 is rotated by the first angle θa. Then, reciprocating rotation of the second angle θb with the rotation in the opposite direction as the first rotation direction is performed while the inner body 2 is suddenly stopped after each rotation operation. Is about 2 of the first angle
The angle is doubled. The first
The angle θa and the second angle θb are different for each rotation operation.
The rotation angle of the inner body 2 is controlled by detecting the rotation angle of the inner cylinder 2 and comparing it with a set value preset in a controller.

[0006]

As a result of analyzing the laundry entanglement in the conventional operation method, it is found that almost no laundry entanglement or twisting occurs during shaking, and the motor is stopped when the inner body stops after the shaking process. It was found that when the power was turned off, the rotation of the inner body gradually stopped due to inertia and uneven distribution of the laundry, and when the rotation returned to the opposite direction, the laundry was entangled. Based on this finding, the present invention uses a motor with a brake to quickly stop the rotation of the inner drum, and to keep the stopped state of the inner drum even if the laundry is unevenly distributed in the inner drum, and further discharges the laundry. The effectiveness was confirmed by quantitatively investigating the occurrence of enemies by changing the inclination angle and rotation of the inner trunk at various times.

[0007] With the above configuration, the occurrence of tangling of the long laundry discharged from the tumble dryer is 20 times that of the conventional method.
It was reduced to about one-third, and it is considered that the reason is roughly as follows. That is, in the conventional method of reciprocating the inner body at the time of discharging the laundry, as shown in FIG. 6, the inner body meanders or swings back when each rotation operation is stopped. The rotation angle of the inner body at each rotation greatly changes, which increases the entanglement of the laundry at the time of discharge. In the case where the inner body is rotated in one direction at the time of discharging, when one end of the laundry abuts on, for example, a conveyor belt during the discharging, the other end still remains on the inner body, so that the laundry is moved in one direction. It is believed that this further increases the entanglement that occurs at the end of the shaking process.

On the other hand, according to the method of the present invention, when the shaking process is completed and when the laundry is discharged, the rotation of each of the rotation operations is suddenly stopped, and the stopped state is held by the brake, and the rotation is returned. Does not occur, the occurrence of entanglement when the rotation is stopped is small, and the inner trunk is rotated by an angle equal to both sides of the angle at the end of the shaking process (position of angle 0 in FIG. 1). Since the laundry is discharged, it is considered that the twist is not added to the laundry being discharged, and that the entanglement of the discharged laundry is significantly reduced due to a synergistic action of these.

[0009]

Next, an embodiment shown in the drawings will be described. FIG. 4 is a front view schematically showing the structure of the rotary dryer, in which an inner shell 2 is rotatable about a horizontal axis by a driving roller 3 and a support roller 4 disposed below an inner shell 2 in an outer shell 1. Supported. The drive roller 3 has a motor 5 that can be driven forward and reverse.
Are connected by a belt transmission 6. The body of the inner body 2 is formed of a mesh plate having a large number of punched holes, and the air heated by the steam heater 8
And discharged by the blower 7. The dry air flows in the inner body 2 in the axial direction, and flows so that the laundry put in the inner body 2 floats in the inner body 2.

As shown in FIG. 5, roller guides 11, 11 are provided on the outer peripheral surface of the inner drum 2, and the drive roller 3 and the support roller 4 support the inner drum 2 at the roller guide 11 portion. I have. The rotation of the motor 5 causes the rotational force to be transmitted to the inner body 2 via the drive roller 3 by friction driving. Several ridges 12 with different heights are provided
13 is formed, and the laundry in a floating state is inverted by the ridges 12 and 13 by the dry air floating in the inner body 2 so that the dry air passes through the laundry uniformly.

FIG. 2A shows the inside of the inner body 2 of the rotary dryer.
As shown in (1), the laundry conveyed by the belt conveyor 14 is thrown in by opening the front door 15, and is dried by one-way rotation or reciprocating rotation of the motor 5 (FIG. 2B). When the drying step is completed, the inner trunk 2 is inclined together with the outer trunk as shown in FIG.
Release 6. At this time, the inclination angle of the inner body 2 is preferably about 6 degrees to 10 degrees. And the inner trunk 2 in the mode shown in FIG.
Is reciprocated and the contents are discharged onto the discharge side conveyor 17 (FIG. 2 (e)). Then, the inner trunk 2 is returned to the horizontal position, the rear door 16 is closed, and the discharging process is completed (FIG. 6F).

The above operation is shown in the flowchart of FIG. The process from the loading of laundry to shaking is the same as the conventional method, and the operation of the inner body 2 in shaking may be either one-way rotation or reciprocating rotation. This shaking operation ends when the timer expires. At this time, a brake motor is used as the motor 5, and when the motor stops rotating, the brake operates to quickly stop the inner body. Next, after tilting the inner trunk and waiting for a certain time, the rear door is opened. In the past, the inner door was inclined after opening the rear door, but doing so caused a part of the laundry to spill partially from the door opening, and this spilled part led to the entanglement, to prevent this After tilting the inner trunk, the rear door is opened.
After waiting for a certain time, the inner trunk 2 is reciprocated in the manner shown in FIG. That is, from the stop position, the inner trunk 2 is rotated by the first angle θa to quickly stop, and then is rotated by θb in the opposite direction to quickly stop. It repeats several times. When the laundry is discharged by performing a series of the rotating operations, the inner body is returned to a horizontal position, the door is closed, and the discharging process is completed.

According to an experiment conducted by the applicant, one of the most preferable examples of the turning operation of the inner body 2 at the time of discharging the laundry is as follows.

[0014] The inner body is rotated 141 degrees from the stop position and rapidly stopped. After maintaining the stop state for 3 seconds, the inner body is rotated 290 degrees to quickly stop. Is repeated 3 to 5 times. At this time, the inclination angle of the inner trunk is 6 degrees. The rotation angle is fixed to a disk 19 provided with a number of cuts 18... Around the output shaft of the motor 5, and the cuts 18.
The control is performed by controlling the motor 5 based on the count value. When the inclination angle of the inner trunk is 10 degrees,
Entanglement was further reduced. On the other hand, when the inclination angle of the inner trunk was increased to 20 degrees, the best result was obtained when the angle θb in FIG. 1 was set to about 160 degrees.

FIG. 1 is a time chart showing the rotation and tilting of the inner body 2 and the opening and closing of the rear door from the end of the shaking operation to the end of the discharging step in the method of the present invention. As is clear from FIG. 1, the inner body 2 is rapidly stopped at the end of the shaking operation and at the end of each rotation in the discharging step, and the stopped state is held by the brake. The moving angle is maintained at an exactly constant angle. On the other hand, in the control by the conventional timer shown in FIG. 6, meandering due to inertia at the time when the rotation of the inner body is stopped, backlash due to uneven distribution of the laundry in the inner body, and slight hunting immediately before the stop occur. Also, when the laundry is discharged from the inner body during the reciprocating rotation of the inner body in the discharging step, the rotation speed of the inner body increases, and the rotation angle of the inner body increases with repetition of the reciprocating rotation. ing.

[0016]

According to the present invention described above, the twist of the laundry discharged from the rotary dryer can be reduced only by changing the operation control method without greatly changing the structure of the conventional rotary dryer. It can greatly reduce entanglement, greatly reduce the time and effort required to load long laundry such as sheets discharged from the tumble dryer into the ironer, and reduce the amount of laundry to the ironer. There is an effect that it is very convenient for automation.

[Brief description of the drawings]

FIG. 1 is a time chart showing the operation of an inner trunk of the present invention.

FIG. 2 is a side view schematically showing the operation of the inner trunk.

FIG. 3 is a flowchart showing an operation procedure.

FIG. 4 is a front view schematically showing a rotary dryer.

FIG. 5 is a bottom view showing the outer peripheral surface of the inner trunk;

FIG. 6 is a time chart showing the operation of a conventional inner trunk.

FIG. 7 is a flowchart showing a conventional procedure.

[Explanation of symbols]

 2 Inner body θa First angle θb Second angle

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D06F 58/02 D06F 58/06

Claims (2)

(57) [Claims] An inner trunk (2) reciprocally rotatable about a horizontal axis.
In a rotary dryer that discharges laundry while reciprocatingly rotating the inner body (2) in a state where the inner body (2) is inclined in the discharge direction after the drying step, the inner body (2) is After tilting, the inner body (2) is turned by the first angle (θa) to stop suddenly, and then reciprocated at the second angle (θb) with the rotation in the reverse direction as the first rotation direction. Rotation is performed while the inner body (2) is suddenly stopped after each rotation operation, and the second angle is set to approximately the first angle of approximately 2
A method for preventing long laundry from entanglement in a tumble dryer, characterized in that the angle is doubled. 2. An inner body in which a rotation operation at the first angle (θa) and a second angle (θb) is detected for each rotation operation.
2. The method according to claim 1, wherein the control is performed by comparing the rotation angle of (2) with a preset value set in a controller.