JP2680682B2 - How to dehydrate laundry - Google Patents

Description

TECHNICAL FIELD The present invention relates to a laundry dehydration method that can be used when dehydrating laundry such as a rubber mat after washing by pressing.

(Prior Art) FIG. 6 shows a conventional dehydrator, and 36 is a gantry, which is installed on the work floor. Reference numeral 37 denotes a pillar which is a component of the gantry 36, and a plurality of pillars 37 are arranged. 38 is a deck as a lattice member fixed to the gantry 36, 39 is a deck plate which is a perforated plate fixed to the deck 38, 40 is a porous or mesh wide endless belt for transportation, 41 Is a roll that drives the conveyor belt 40, 42 is a basket whose lower half is formed of a perforated plate in a cylindrical shape, 43 is an input port which is an opening formed in the upper part of the basket 42, and 44 is fixed to the basket 42 The guide is engaged with the pillar 37.

46 is a lifting drive device that is fixed to the pedestal 36 and engages with the basket 42 by a chain or the like, 47 is a hydraulic cylinder fixed to the pedestal 36, 48 is a hydraulic device including an oil tank for the hydraulic cylinder 47 and a hydraulic circuit, 49 is a hydraulic pump for the hydraulic system 48,
Reference numeral 50 is a drive motor for the hydraulic pump 49, 51 is a piston rod of the cylinder 47, 52 is a bowl-shaped member fixed to the piston rod 51, and 53 is an elastic material that closely adheres the bowl-shaped member 52 and the opening to enclose water. A membrane which is a membrane, 54 is a water supply port mounted on the bowl-shaped member 52, 55 is an air vent port mounted on the bowl-shaped member 52, 56 is water enclosed between the bowl-shaped member 52 and the membrane 53, 57 Is a ring that holds the membrane 53 in close contact with the bowl-shaped member 52.
It is a fixture that is bolted to 52. Reference numeral 58 is a continuous water washing machine arranged before the dehydration step, 59 is a discharge conveyor arranged after the dehydration step and connected to a drying machine (not shown), and the like.
Is laundry, which is clothes or the like to be dehydrated.

FIG. 7 shows a drive control circuit diagram of the hydraulic cylinder 47, in which 61 is a proportional solenoid valve, a control valve, and a plurality of preset pressures set in advance by a controller to sequentially adjust the dehydration pressure by a timer (not shown), It is a hydraulic control device for achieving the set dehydration pressure-time relationship. A directional control valve 62 operates the pump 49 to supply the oil 66 to either the upper side or the lower side of the cylinder 47, thereby lowering and raising the piston rod 51. Here, when the upper side 62A of the directional control valve 62 is excited, the pressure oil from the pump 49 is supplied to the upper side of the piston of the cylinder 47, so the piston rod 51 descends, pressurizes the laundry 60, and spins it off. To do. When the lower side 62B is excited, the pressure oil from the pump 49 is supplied to the lower side of the piston of the cylinder 47, and the piston rod 51 moves up.

63 is the oil from the pump 49 due to the signal from the pressure control device 61.
Relieve 66, return to the oil tank 65 via the return pipe 64, a servo valve that adjusts the dehydration pressure rises above a certain pressure, if the pressure rises above the signal from the pressure control device 61, Oil from pump 49 is returned from servo valve 63 to return pipe
Return to the oil tank 65 via 64. 67 is a suction filter for removing foreign matter from the oil 66 sucked into the pump 49.

Next, the operation will be described. When the dehydrator is in the state shown in FIG. 6, that is, when the belt 40 is stopped, the basket 42 is in the lowered position, and the piston rod is in the raised position, the continuous washing machine 58 is almost constant. The laundry 60 is put into the basket 42. Next, when the hydraulic device 48 operates upon receiving a signal indicating the completion of the injection from the continuous water washing machine 58, the piston rod 51 is lowered and the membrane 53 pressurizes the laundry 60. At this time the 7th
The upper side 62A of the directional control valve 62 shown in the figure is excited, the oil 66 is sucked up from the suction filter 67 by the pump 49, and is supplied above the cylinder 476 via the directional control valve 62. The pressurization of the object 60 is started. After that, the laundry 60 is pressurized by the oil 66 supplied from the pump 49, and when the set maximum pressure is reached, the oil 66 from the pump 49 is relieved from the servo valve 63 by the signal of the pressure control device 61 and returned to the return pipe 64. After returning to the inside of the tank 65, the dehydration is continued while maintaining a constant pressure.

Further, it is said that pre-dewatering is effective at the time of starting the pressurization of the laundry 60 to prevent the laundry 60 from being damaged depending on its type. For example, at the start of dehydration of sheets,
As shown in FIG. 8, the first preliminary dewatering pressure acting on the laundry 60 is set to a low pressure, for example, 0.5 kg / cm ² or less for T ₄ hours, for example, 5 seconds or more, and then the dewatering pressure is gradually increased to the second The preliminary dehydration pressure is set to medium pressure, for example, 7.0 kg / cm ² or less, T ₅ hours, and the total time (T ₄ + T ₅ ) is set to 10 seconds or more.

When the dehydration is performed in this way and the timer times out after T ₀ time, the circuit of the hydraulic device 48 is switched, and the piston rod 51 is slightly raised to maintain the intermediate position or rise to the upper limit. Next, when the lifting device 46 is operated after the pressure applied by the membrane 53 is released, the basket 42 engaged with the chain or the like is raised. When the drive roll 41 is rotated in the direction of the arrow by a signal detected by the limit switch (not shown) of the ascent of the basket 42, the endless belt
As the 40 rotates, the laundry 60 moves toward the conveyor 59 and is discharged.

When the conveyor 59 conveys the dehydrated laundry 60 to a dryer (not shown) or the like, this is detected by a timer (not shown), a photoelectric tube or the like, and the drive roll 41 is detected by the detected signal.
Stop the rotation of. When the drive roll 41 stops rotating,
The stop signal causes the basket 42 to return as previously described.
Lower the belt 40 to the lowered position, and
To the raised position to restore the state shown in FIG. Next, the rise of the piston rod 51 is detected by a limit switch (not shown) or the like, and this signal causes the continuous washing machine 58 to load the laundry 60, and the dehydration is intermittently performed by repeating the above-described operations.

(Problems to be solved by the invention) In the conventional dehydrator, in the case of a woven fabric such as a sheet, by holding at a low pressure or a medium pressure for a certain period of time, the laundry is washed.
Water and air are discharged through 60, but water permeability and
Non-breathable laundry, such as rubber mats, does not permeate even if the pressure is held for a certain period of time, and if you continue to squeeze to the maximum pressure, the closed water and air pools created in the laundry will escape. , The rubber mat etc. will be ruptured and damaged,
Rubber mats cannot be used as products.

The present invention has been proposed to solve the above-mentioned conventional problems.

(Means for Solving the Problem) Therefore, in the present invention, in a device for dewatering laundry by squeezing water such as water permeability and air permeability after washing, the laundry is closed in a bag shape at the initial stage of dewatering. After squeezing to below the pressure at which the laundry due to the accumulated water or air bursts, the pressure is released, the water or air generated inside releases it from the pool, and then the maximum pressure is applied. In this way, this is a means for solving the problem.

In addition, the present invention provides a device for dehydrating water by washing, such as a rubber mat having water permeability and air permeability after washing, by squeezing.
After the laundry is closed in the initial stage of dehydration, it is squeezed into a bag-like shape by squeezing water or air, and after squeezing it, the pressure is released and the squeeze membrane is temporarily raised to wash rubber mats. This is a means for solving the problem, in which the closed state of water or air is removed by the repulsion of the object, the closed pool of water or air is removed, and then the pressure is increased to the maximum pressure.

(Operation) According to the present invention, it is possible to prevent breakage of laundry such as a rubber mat which is dehydrated under pressure by a dehydrator, and to improve the residual water ratio, thereby saving energy of a dryer in a post process. Also useful for. Further, a high dehydration rate can be achieved without the rubber mat and the like bursting, and the water blocked in the rubber mat can be drained by its own pressure.

(Embodiments) The present invention will be described below with reference to the embodiments in the drawings.
5 to 5 show an embodiment of the present invention. In FIG. 1, 40 is an endless belt, 42 is a basket, 47 is a hydraulic cylinder, 49 is a hydraulic pump, 50 is a drive motor, 51 is a piston rod, 52 is a bowl-shaped member, 53 is a membrane, 60 is laundry,
62 is a directional control valve, 62A and 62B are upper and lower sides of the directional control valve 62, 63 is a servo valve, 64 is a return pipe, 65 is an oil tank, 66 is oil, and 67 is a suction filter. Since they are the same as the conventional ones, detailed description thereof will be omitted here.

Explaining the difference from the prior art, the pressure controller 76 in FIG. 1 controls the servo valve 63 and the directional control valve 62. Also, in FIG.
Indicates a bag-like laundry, 69 indicates water and air closed inside, and 74 indicates internal pressure.

Next, the operation will be described. When a constant amount of laundry 60 is put into the basket 42 from the continuous water washing machine (not shown in FIG. 1) to enter the dehydration step, the dehydration pressure shown in FIG.
In the time diagram, after squeezing at a low pressure for T ₁ hour with a timer (not shown), the pressure is zero for T ₂ hours, or the upper side 62A of the direction control valve 62 is demagnetized for T ₂ hours to release the pressure. When controlled in such a pattern, the squeezing portion is squeezed in the direction of arrow 70 at a low pressure through the piston rod 51 as shown in FIG. 3, and a part of the laundry 60 becomes a bag-like laundry 68. like,
Internal pressure 74 is generated due to the presence of water or air 69 closed inside.

By removing the pressure for T ₂ hours as described above,
As shown in the figure, the piston rod 51 slightly returns in the direction of the dotted arrow 71, and water or air having an internal pressure 74 that is closed and escapes in the direction of the arrow 75 by its own pressure. At this time, when the lower side 62B of the directional control valve 62 is excited, the piston rod 51 rises in the direction of arrow 72 in FIG. 5, and the bowl-shaped member 52 and the inner membrane 53 separate from the laundry. By doing so, laundry having a high resilience, such as a rubber mat, repels greatly when trying to return to its original shape, and the bag-like laundry 68 becomes free, and water or air enclosed inside is closed. 69 is easier to pull out.

After the above steps are repeated once (T ₁ + T ₂ hours) or multiple times (T ₃ + T ₂ hours), if the product is dehydrated under the maximum pressure in the same pattern A as before, the laundry will not be damaged. Pressurized dehydration is possible. Further, at this time, after the water or air in the bag-shaped reservoir is drained once or multiple times at a low pressure, it is possible to pressurize to the maximum pressure all at once with the pattern B shown by the one-dot chain line in FIG. The residual water rate is obtained. In addition, the low pressure that has been described so far is a pressure below the bursting pressure (10 to 20 kg / cm ^{2 for a} rubber mat, etc.) when the laundry 60 to be squeezed is sealed (for example, in the shape of a water pillow). (3-10 for rubber mats etc.
Say kg / cm ² ).

(Effects of the Invention) Since the present invention is configured as described in detail above, it is possible to eliminate breakage that occurs in laundry such as a rubber mat which is dehydrated under pressure by a dehydrator, and to improve the residual water ratio. It is also possible to save energy of the dryer in the subsequent process. Further, a high dehydration rate can be achieved without the rubber mat and the like bursting, and the water blocked in the rubber mat can be drained by its own pressure.

[Brief description of the drawings]

FIG. 1 is a hydraulic circuit diagram in an apparatus for carrying out the method of the present invention, FIG. 2 is a dehydration pressure-time diagram in the present invention, and FIG.
FIG. 4, FIG. 5 and FIG. 5 are explanatory views of a squeezing section showing different operating states in the present invention, FIG. 6 is a side sectional view showing a conventional dehydrator, and FIG. 7 is a hydraulic circuit in a conventional dehydrator. FIG. 8 is a dehydration pressure-time diagram according to the conventional dehydration method. Description of main parts of the figure 42 …… Basket 47 …… Hydraulic cylinder 49 …… Hydraulic pump 51 …… Piston rod 52 …… Bowl-shaped member 53 …… Membrane 60 …… Washing 68 …… Bag-like washing 68 …… Closed water or air 74 …… Internal pressure 76 …… Pressure control device

Claims (2)

(57) [Claims] 1. A device for dewatering laundry such as a rubber mat having no water permeability and breathability after washing by squeezing, which is caused by a pool of water or air when the laundry is closed at the beginning of dewatering to form a bag shape. After squeezing to below the pressure at which the laundry bursts,
A method for dewatering laundry, characterized in that the pressure is released, the water and air generated inside the pool releases it from the pool, and then the pressure is increased to the maximum pressure. 2. A device for dehydrating laundry by squeezing after washing, such as a rubber mat having no water permeability and breathability, by the accumulation of water or air when the laundry is closed in a bag shape at the initial stage of dehydration. After squeezing to below the pressure at which the laundry bursts,
It is characterized by releasing the pressure and temporarily raising the squeezing membrane to make it free due to the resilience of laundry such as a rubber mat, removing the closed water and air pools, and then pressurizing to the maximum pressure. How to dehydrate laundry.