JP2014023624A - Method for washing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for washing that, in a multi-tank type automatic washing machine, laundry including a diaper with massive crut can be washed and cleaned such that hygienic environment during washing is not impaired, burden for operator can be reduced and the dependability is high.SOLUTION: A method for washing a laundry with massive crut uses continuous washing system comprising one or more of preliminary washing tanks and main washing tanks. The method also comprises washing the laundry in the at least one preliminary washing tank while discharging a preliminary washing water of an upper layer within the tank including the massive crut as floated.

Description

  The present invention relates to a washing method, and more particularly, to a washing method of an object to be washed with lump soil using a continuous washing machine system.

  Along with the increase in the nursing care population that is progressing with the aging of the population, efforts are being made to reduce the cost of nursing care as well as the spread and quality of nursing care services. Washing dirty diapers is a burdensome task for caregivers. Conventionally, as shown in Patent Document 1, after lump-like dirt such as stool is first discharged to a toilet such as a toilet, it is washed and sterilized by an automatic washing machine, and then dried and used. However, this method involves a lot of troublesome work, is inefficient when processing a large amount of objects to be washed, has a large variation, and has a high rate of re-washing (rewashing rate), which is expensive and unsanitary. It was also accompanied by risks such as infections.

  As an example of a conventional method for washing a large amount of items to be washed out in a hospital or the like, there is a counter flow type continuous washing machine system as described in Patent Document 2. This is provided with a processing drum having a feeding port at one end and a carry-out port at the other end, and a transfer means for transferring the washing item in the tank to a plurality of tanks connected to the inside, and washing water. And a supply device and a discharge unit for supplying and discharging rinsing water, and washing and rinsing by sequentially transferring an object to be washed from an input port to a carry-out port in a direction opposite to the flow of washing water (FIG. 1). Even if a good result is obtained when washing general items to be washed such as sheets, this method is good even when washing items to be washed with lumpy soil such as diapers under the same washing conditions. Cannot be obtained.

  On the other hand, Patent Document 3 discloses a method for washing diapers using a continuous washing machine system. This method is a washing method characterized in that a cloth diaper containing a water-absorbing polymer is put into a continuous washing machine equipped with an enzymatic decomposition tank, and the water-absorbing polymer is enzymatically decomposed and washed. The main purpose is to increase the rate of decomposition and removal of the water-absorbing polymer from the fabric diaper and facilitate the reuse of the fabric. As a washing apparatus that enables such continuous operation, a batch flow system known from Patent Document 3 can be used in addition to the counter flow system disclosed in Patent Document 2.

  However, even if washing is carried out using any of the continuous washing methods, the lump dirt adhered to the diaper or the underwear is likely to remain even after rinsing the dirt dispersed in the small lump, resulting in the need for rewashing. In order to significantly reduce the efficiency of the system, a solution has been desired.

Japanese Patent Laid-Open No. 2003-24678 JP 2007-159660 A JP 2007-82646 A

  The present invention uses a continuous washing machine system to wash and remove lump dirt attached to an object to be washed with high reliability, and does not impair the sanitary environment during washing, and burdens on workers and care costs It is an object of the present invention to provide a method capable of reducing the above.

  The present inventors have made various studies on the reason why sufficient washing cannot be performed by the method described in Patent Document 2 and the like. As a result, even if lump such as stool is put into the washing tub and rotated together with the washing water, if it is sandwiched between the cloth and the cloth, sufficient turning force does not act on the lump, resulting in the cloth and cloth. It was thought that one of the reasons was that it was not possible to escape from between. It is estimated that it is effective to supply sufficient pre-wash water to make it easy for the bulk dirt to approach the drain hole at the bottom of the pre-wash tank in order to discharge the bulk dirt sandwiched between such cloths. It was done.

  However, lump dirt cannot be removed efficiently only by increasing only the pre-wash water supply amount. The reason for this is that the bulk soil contains a lot of organic fiber, so the specific gravity is relatively small.Furthermore, if bubbles of pre-washing detergent adhere, the buoyancy acts so that it tends to float, resulting in slow discharge from the drain hole at the bottom of the pre-washing tank. It was estimated that

  Therefore, the present inventors have further studied based on such knowledge, and when performing the pre-washing in the pre-washing tank, the object to be washed is removed while removing the pre-washing water of the upper layer in the tank containing floating lump dirt. It has been found that by washing, massive dirt can be efficiently removed and the re-washing rate can be significantly reduced. Furthermore, it has been found that it is particularly preferable to use both the drainage from the drainage hole at the bottom of the prewash tank and the drainage from the top and bottom of the prewash water in the upper layer of the tank, and the present invention has been achieved.

That is, the present invention
1. A method for laundering an item to be washed with a lump of dirt using a continuous washing machine system including at least one prewash tank and one or more main wash tanks, wherein lumpy dirt that floats in at least one prewash tank Washing while draining the pre-wash water of the upper layer in the tank containing
2. The method according to 1 above, wherein the draining of the pre-wash water of the upper layer in the tank is performed by overflow of the pre-wash water from the tank;
3. The method according to 1 or 2 above, wherein in the prewash tank for draining the prewash water in the upper layer in the tank, the prewash water in the lower layer in the tank is also drained;
4). 4. Laundry according to 3 above, wherein the ratio (p / q) of drainage amount (p) of prewash water in the upper layer in the tank to drainage amount (q) in the lower layer of the tank is 0.5 or more. Method;
5. The pre-wash tank and main wash tank consist of inner and outer trunks,
The inner and outer cylinders have an opening for keeping the water level at a predetermined position on the outer cylinder,
Among the prewash tanks, at least the tank that drains the prewash water of the upper layer in the tank has a drainage valve that controls drainage from the drainage hole and the drainage hole at the bottom,
The pre-wash water drainage of the upper layer in the tank containing floating lump dirt is performed by supplying pre-wash water in an excessive amount rather than maintaining the water level below the opening, and draining the pre-wash water from the opening by overflow. The method according to any one of the above 1 to 4, characterized by:
6). The washing method according to 5 above, wherein in the prewash tank for draining the prewash water of the upper layer in the tank, the drainage valve is opened to drain water through the drain hole at the bottom of the prewash tank;
7). In the pre-washing tank that drains the pre-wash water of the upper layer in the tank, one tact from the input of the washing object to the transfer to the next tank,
(1) Putting detergent and objects into the pre-wash tank, supplying pre-wash water into the pre-wash tank, and continuing to supply the pre-wash water, draining the pre-wash water from the opening by overflowing A first pre-washing step, including washing,
(2) The process of draining the prewash water by opening the drain valve of the prewash tank while the prewash water supply is continued or stopped.
(3) A second pre-washing process in which pre-wash water is supplied again and washed after the drain valve is closed.
(4) After the second pre-washing step, the step of transferring the article to be washed to the next tank,
The washing method according to 5 or 6 above, characterized by comprising:
8). The washing method according to any one of 5 to 7 above, wherein in the prewash tank that drains the prewash water of the upper layer in the tank, the swing angle of the inner body is 200 ° to 300 °;
9. The washing method according to 7 or 8 above, wherein drainage due to overflow of prewash water is performed only in the first prewash step;
10. The washing method according to 7 or 8 above, wherein drainage due to overflow of prewash water is performed in both the first prewash step and the second prewash step;
11. The ratio of the prewash water drainage amount (p) of the upper layer in the tank (p / q) to the prewash water drainage amount (q) of the tank lower layer is 0.5 or more, How to wash;
12 The washing method according to any one of 7 to 11 above, wherein in the step (2), the drainage valve is opened in a state where the supply of the pre-wash water is stopped;
13. The continuous washing machine system further includes one or more rinsing tanks downstream of the main washing tank, and drainage from any at least one of the rinsing tanks serves as prewash water, and drains prewash water of the upper layer in the tank. The washing method according to any one of 1 to 12 above, wherein the washing method is supplied to a prewash tank to be performed;
14 The continuous washing machine system further includes a dehydrator downstream of the main washing tank, and drainage from the dehydrator is supplied as prewash water to a prewash tank that drains prewash water in the upper layer of the tank. Any one of the washing methods 1 to 12 above;
15. The continuous washing machine system further includes one or more rinsing tubs and dehydrators downstream of the main tub, of which both drainage from at least one rinsing basin and drainage from the dehydrator are prewash water. The washing method according to any one of 1 to 12 above, wherein the washing method is supplied to a prewash tank that drains prewash water of the upper layer in the tank;
16. The washing method according to any one of the above 1 to 15, wherein a continuous washing machine system in which a washing object is conveyed by a counter flow method is used.
17. The washing method according to any one of 1 to 16 above, wherein the item to be washed is a diaper and a cleaning towel;
About.

  According to the washing method of the present invention, the object to be washed with lump-like dirt is put into the pre-washing tank, and the pre-wash water in the upper layer of the pre-washing tank containing lump-like dirt that is detached from the washing object is discharged from the pre-washing tank. By washing, floating bulky dirt can be discharged together with the prewash water. In addition, together with the drainage of the prewash tank in the upper layer of the prewash tank and the drainage of the prewash water in the lower layer of the prewash tank, massive dirt can be efficiently discharged from both the upper and lower directions. This effect makes it possible to reduce the amount of massive dirt brought into the main washing tank as much as possible. Furthermore, by using recycled water from the rinsing tank and dewatering machine squeezed water as pre-washing water, it is possible to rewash while saving washing water. The laundry which was preferable in terms of ecology with a low rate became possible.

FIG. 1 is a schematic view showing an example of an embodiment of a counter flow type continuous washing machine system in which washing water flows from the opposite direction to the movement of an object to be washed. FIG. 2A is a diagram illustrating the swinging motion of the inner trunk. FIG.2 (b) is a figure which shows the structure for transferring a to-be-washed object to the following tank. FIG. 3 is a schematic diagram of steps included in one tact of the pre-washing step.

  The continuous washing machine system used in the present invention includes at least one prewash tank and at least one main wash tank. The number of prewash tanks is preferably 1 to 3, in particular 1, and the number of main wash tanks is preferably 1 to 15, particularly preferably 4 to 10 and especially 6. In the present invention, in at least one of these prewash tanks, preferably in the prewash tank into which the article to be washed is first charged, the prewash water in the upper layer of the prewash tank containing the lump that has been detached and floated from the article to be washed is drained. , Do the laundry. In one embodiment, this prewash water can be drained by overflow of prewash water from the tank.

  Here, the upper layer in the upper layer of the prewash tank refers to the upper part from the approximate center in the height direction of the prewash tank, and does not limit the specified part. Similarly, the lower layer of the pre-washing tank is an expression that points from the center to the lower part.

  It is unclear why the method of the present invention was not known as a method for washing bulk soil. Conventionally, the role of flush water is thought to be to pre-wash with the water after the object to be washed is poured into the pre-wash tank, and there is a strong awareness that it is not preferable to overflow the water and detergent. The reason for this is that, as shown in Patent Document 3, efforts have been made mainly for the method of enhancing the cleaning power of the main washing process in order to remove massive dirt remaining in the pre-washing. Conceivable.

  In one of the preferred embodiments of the present invention, in the prewash tank that drains the prewash water, the prewash water in the lower layer in the tank is also drained. In one embodiment, the drainage of the pre-wash water in the lower layer in the tank can be performed using a drain hole provided in the lower part of the pre-wash tank, preferably the bottom, and a drain valve for controlling drainage from the drain hole. Thus, by performing both the drainage of the prewash water in the upper layer in the tank and the drainage of the prewash water in the lower layer in the tank, massive dirt can be efficiently discharged from both the upper and lower directions. With this effect, the amount of massive dirt brought into the main washing tank can be reduced as much as possible.

  In this case, in one of the advantageous forms, the ratio of the drainage amount p of the prewash water in the upper layer in the tank and the drainage amount q of the prewash water in the lower layer in the tank is preferably p / q = 0.5 or more. If it is less than or equal to this range, removal of massive dirt tends to be insufficient. Particularly preferred is p / q = 0.5 to 4.0, especially 1.0 to 3.0, especially 1.0 to 2.0. It is possible to exceed this range, and there is no effect on the removal effect of bulky dirt, but in this case, the consumption of prewash water increases, which is not preferable in terms of cost and water saving.

  In one aspect of the present invention, the prewash tank and / or the main wash tank includes an inner and outer cylinders configured of a fixed outer cylinder and a swinging inner cylinder. The water supplied for pre-washing and main washing is stored in the water tank of the outer body, and the inner body with many punching holes oscillated while immersed in the water. As shown in FIG. 2A, the swing is a motion that vibrates like a pendulum motion of a watch in the right direction and the left direction.

  In one aspect of the present invention, the inner and outer cylinders have an opening for keeping the water level at a predetermined position in the outer cylinder, as in a conventionally known continuous washing system. In the present invention, in one embodiment, drainage of the pre-wash water in the upper layer of the pre-wash tank including the floating lump can be performed by draining the pre-wash water by overflow through this opening. The overflow in this case can be performed by supplying an excessive amount of prewash water as compared with the prewash water amount supplied in order to keep the water level below the opening in the operation method of the continuous washing system according to the prior art. In this case, in the method of the present invention, the swing angle of the inner cylinder, that is, the angle at which the horizontal line passing through the center in a stationary state may swing as in the prior art, but particularly in a prewash tank that overflows, 180 ° to 320 °. If the angle is less than 180 °, there is a risk of poor washing due to a small force at the time of washing. If it exceeds 320 °, the prewash water is likely to overflow before sufficient washing is performed, and it is likely to be accompanied by poor washing as well. When the swing angle is in the range of 200 ° to 300 °, the overflow of the prewash water is particularly appropriately enhanced, which is particularly preferable.

In one aspect of the present invention, in the pre-washing tank that drains the pre-wash water of the upper layer in the tank containing floating lump dirt, one tact from the loading of the object to be washed to the next tank is preferably ( 1) Putting detergent and objects into the pre-washing tank, supplying pre-washing water into the pre-washing tank, and continuing to supply the pre-washing water, washing the washing object while draining the pre-washing water from the opening by overflow First pre-washing process, including
(2) The process of draining the prewash water by opening the drain valve at the bottom of the prewash tank while the prewash water supply is continued or stopped.
(3) A second pre-washing process in which pre-wash water is supplied again and washed after the drain valve is closed.
(4) After the second pre-washing step, the step of transferring the article to be washed to the next tank,
including. Drainage due to overflow of prewash water can be performed only in the first prewash process or in both the first prewash process and the second prewash process. The opening of the drain valve in the step (2) is preferably performed in a state where the supply of the prewash water is stopped.

  In the present invention, the first pre-washing step and the second pre-washing step are not separated, the pre-wash is performed, the drain valve is opened, the pre-wash water is drained, and the object to be washed is transferred to the next tank without the second pre-wash. It is also possible to do this. However, as in the preferred embodiment, by providing the second prewash, the waste water of the first prewash can be drained once, and the rinsing effect of the second prewash can reduce the amount of dirt brought into the next tank as much as possible. Is obtained.

  When the pre-wash water overflow is performed only in the first pre-wash process, the pre-wash water drainage amount p in the tank upper layer and the pre-wash water drain amount q in the tank lower layer are respectively the upper layer drainage amount and the lower layer drainage amount in the first prewash step. The amount of drainage is shown, and the ratio is preferably p / q = 0.5 or more. In the case of p / q <0.5, removal of massive dirt tends to be insufficient. Particularly preferred is p / q = 0.5 to 4.0, especially 1.0 to 3.0, especially 1.0 to 2.0. It is possible to exceed this range, and there is no effect on the removal effect of bulky dirt, but in this case, the consumption of prewash water increases, which is not preferable in terms of cost and water saving.

  When overflow of prewash water is performed in both the first prewash process and the second prewash process, the drainage amount p of the prewash water in the upper layer in the tank and the drainage amount q of the prewash water in the lower layer in the tank are respectively the first prewash process, The sum of the drainage amount of the upper layer and the sum of the drainage amount of the lower layer in the second prewash step is shown, and the ratio is preferably p / q = 0.5 or more. In the case of p / q <0.5, removal of massive dirt tends to be insufficient. Particularly preferred is p / q = 0.5 to 4.0, especially 1.0 to 3.0, especially 1.0 to 2.0. It is possible to exceed this range, and there is no effect on the removal effect of bulky dirt, but in this case, the consumption of prewash water increases, which is not preferable in terms of cost and water saving.

  In the method of the present invention, the washing temperature (the temperature of the prewash water in the prewash water and the temperature of the main wash water in the main wash) is not particularly limited, but is preferably 40 to 80 ° C. If the temperature is 40 ° C. or lower, cleaning is likely to be poor.

  Detergent liquid is supplied to the prewash tank and the main wash tank. The detergent solution can be put into any one of one or more prewash tanks and main wash tanks. In particular, it is effective to supply the cleaning liquid to a prewash tank that drains the prewash water in the upper layer in the tank.

  As a detergent component constituting the detergent solution to be supplied, a suitable detergent component is selected depending on the type and amount of the object to be washed, and is not particularly limited. Generally, a surfactant, a builder, etc. Consists of

  Pre-washing and main washing can be preferably carried out with water containing a detergent such as an alkaline detergent or a neutral detergent. Here, the concentration of the alkaline detergent is preferably 0.05 to 10% by mass, more preferably 0.2 to 5% by mass, and the concentration of the neutral detergent is preferably 0.01 to 1% by mass, more Preferably it is 0.03-0.3 mass%. The pH of these detergents is preferably 7.0 or more in an aqueous solution having a solid concentration of 0.1% by mass. Such alkaline detergent or neutral detergent is not particularly limited, and a conventional laundry detergent can be used. Moreover, an additive, for example, a recontamination inhibitor, an enzyme, an antifoaming agent, etc. can be included as needed.

  As the surfactant included in the detergent, an anionic surfactant and / or a nonionic surfactant can be used. Examples of the anionic surfactant include (1) soaps such as alkali metal salts (for example, sodium salts and potassium salts) of fatty acids having 10 to 20 carbon atoms, monoethanolamine salts, triethanolamine salts; (2) carbon Α-sulfo fatty acid esters such as sodium α-sulfo fatty acid esters of several 10 to 20; (3) alkyl benzene sulfonates such as sodium alkyl benzene sulfonate having alkyl having 10 to 14 carbon atoms; (4) sodium dodecyl sulfate, etc. Examples thereof include higher alcohol sulfates having 10 to 20 carbon atoms. Examples of the nonionic surfactant include (1) polyoxyethylene alkyl ether having an alkyl group having 6 to 14 carbon atoms; (2) polyoxyethylene alkylphenol ether having an alkyl group having 6 to 18 carbon atoms. Etc.

  Builders included in the above detergent are used to adjust the pH of the detergent. As the builder, an alkali builder is preferable. Examples of the alkali builder include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, alkali metal carbonates such as sodium carbonate, and alkali metal silicates such as sodium silicate. In addition, as other builders, for example, inorganic phosphates such as tripolyphosphate and pyrophosphate, hydrogen carbonate, and the like can be used.

  Furthermore, in one embodiment of the present invention, the disinfectant is supplied to one or more, preferably one main wash tank.

  As the disinfectant of the present invention, general laundry disinfectants such as hypochlorous acid aqueous solution and peracetic acid aqueous solution are used. Among them, a hypochlorous acid aqueous solution is most preferable in terms of sterilizing power, cost, and the like.

Pure hypochlorous acid is a kind of oxo acid of chlorine and has a odor of lime. For the sterilization of the present invention, hypochlorous acid is used as a low-concentration aqueous solution, but the concentration as a sterilizing agent is generally about 10 to 100 ppm, preferably about 20 to 50 ppm.
Hypochlorous acid has a function for bleaching as well as sterilization. In the present invention, when having a bleaching function, it is preferable to set the concentration higher than that for sterilization. Generally, the concentration is 100 to 500 ppm, particularly preferably 300 to 400 ppm. It can have both sterilization and bleaching functions.

  The disinfectant can be supplied to any one of one or more main wash tanks, especially when using an aqueous solution of hypochlorous acid as the disinfectant. However, when the alkaline detergent is used as a cleaning liquid for the main washing tank, the concentration of the detergent in the main washing tank is low and the pH is sufficiently lowered. For example, it is advantageous to supply a disinfectant to the last main washing tank, so that an effective disinfecting action can be exhibited.

  In one aspect of the invention, the continuous laundry system further comprises at least one rinsing tub, at least one finishing tub, and / or at least one dehydrator. The number of rinsing tanks is preferably 1-10, particularly preferably 2-6, in particular 3, the number of finishing tanks is preferably 1-3, in particular 1, and the number of dehydrators is usually 1. When both a rinsing tank and a finishing tank are included, the order is usually a rinsing tank and then a finishing tank, and when a dehydrator is further included, the dehydrator is usually arranged downstream of the finishing tank. The rinsing tank and the finishing tank can be composed of inner and outer cylinders as in the pre-washing tank and main washing tank, and the outer cylinders can also have openings in the outer cylinder for keeping the water level constant. .

  In one aspect of the present invention, the pre-wash water supplied to the pre-wash tank is a rinse tank, preferably drainage from the rinse tank in which the article to be washed is first introduced after the main wash, and / or Or the waste water from the dehydrator is recycled and used. By doing so, it is possible to perform washing that is preferable in terms of ecology with a low re-washing rate while saving washing water. The waste water from the rinsing tank and / or the dehydrator is preferably supplied to a pre-washing tank that drains the pre-wash water in the upper layer in the tank.

  An appropriate amount of finishing agent is added to the finishing tank, but in some cases, it is not necessary to add a finishing agent. As the finishing agent, a general softening agent that softens the article to be washed and a fragrance imparting fragrance are appropriately selected and used. In addition, an antibacterial agent or the like can be used as a finishing agent as necessary.

  In the present invention, any of a continuous washing method called a counter flow method, a batch flow method, and a co-flow method can be used, and among them, the amount of dirt brought into the main washing tub especially by a counter flow method washing machine. Is most preferable for the present invention in that the re-washing rate is low.

  The method of the present invention can be applied to any object to be washed having massive dirt such as stool and vomit, such as diapers and wiping towels.

  Hereinafter, the method of the present invention will be described in more detail with reference to the accompanying drawings. Here, the counter flow method will be described as an example.

  FIG. 1 is a schematic view showing an example of an embodiment of a counter flow type continuous washing machine system in which washing water flows from the opposite direction to the movement of an object to be washed. Such a continuous washing machine system itself is also called a Milner continuous washing machine, and its configuration itself is known (for example, Patent Documents 2 and 3).

  As shown in FIG. 1, the continuous washing machine system of the present embodiment includes an independent pre-washing section C (pre-washing tub 1) having a washing object inlet B, an inner and outer body (double drum), and a main washing section D (main Washing machine 2-7), rinsing part E (tank 8-10)], finishing part F (tank 11), and a continuous washing machine system A composed of a plurality of modules 1-11 and a dehydrator G connected thereto. A fresh water supply valve 31 for supplying fresh water to at least one tank of the rinsing part E (8 to 10) of the continuous washing machine system A, a prewash tank 1 of the continuous washing machine system A, and main wash tanks 2 to 7 A detergent supply line 34 for supplying detergent from the detergent stock tank 21, a disinfectant supply line 35 for supplying disinfectant from the disinfectant stock tank 22 to the main washing tank, and a finishing agent from the finisher stock tank 23 to the finishing tank 11. The finishing agent supply line 36 and the prewash tank 1 The pre-wash water drain valve 42 for discharging the pre-wash water provided in the section, the main wash drain pipe 43 for discharging the wash water from the main wash tank 2, and the recycled water discharged from the rinsing section E of the continuous washing machine system A are recycled. A line 44 that flows to the water distribution tank 25, a first recycled washing water supply line 37 that returns recycled water to the main washing tubs 5 and 7 of the continuous washing machine system A via the pump 52, and a pump from the recycled water distribution tank 25. A flush tank 24 to which recycled water is supplied via 53, a fresh water replenishment valve 32 for supplying fresh water to the flash tank 24, a pump 54, and a valve 41 to the prewash tank 1 of the continuous washing machine system A And a second flush water supply line 33 for supplying water.

  Moreover, in this embodiment, it connects with the line 35 which supplies the hypochlorous acid aqueous solution which is disinfectant to the main washing part D of the continuous washing machine system A, the line 36 which supplies finishing agent to the finishing tank 11, and the finishing part F A dewatering unit G for supplying the waste water from the rinsing tank 8 to the flash tank 24 via the recycle water distribution tank 25, and a waste water (recycled water) for the dehydrator G. A recovery water supply line 39 is provided that is recovered in the recovery tank 26 via the pipe 45 and supplied to the flash tank 24 via the pump 51. The washing object 71 is transported to the upper part of the charging port B of the continuous washing machine A and dropped into the charging port B by a method such as a belt conveyor.

  As shown in FIG. 2 (a), a plurality of modules 1 to 11 comprising an independent pre-washing section C having an inner and outer cylinder (double drum), a main washing section D, a rinsing section E, and a finishing section F 80 is swinging while synchronizing. Here, water such as prewash water is stored in a water tank as the outer drum of the double drum, and the inner drum having a large number of punched holes is swung in the water.

  The swinging is performed by the four large protrusions (crosspieces) 81 in the drum that struck the object to be washed, scraped and dropped repeatedly. During this time, the object to be washed is strongly stirred in the washing water. Alternatively, it has a function of enhancing the rinsing effect. In addition, a plurality of modules (tank 1 to 11) consisting of independent pre-washing part, main washing part, rinsing part and finishing part with inner and outer drums (double drum) are adjusted to each set temperature by heating mechanism in each tank can do.

  Moreover, between each module, as shown in FIG.2 (b), it scoops up with the scoop (spiral chute | shoot) 91 which has the hole 92 with which each module is equipped, and becomes a structure transferred to the following tank. Note that a slide transfer type may be used instead of the scoop.

  Flow knot valves 12, 13, and 14 are provided at the boundary between the pre-washing section C and the main washing section D, the main washing section D and the rinsing section E, and the rinsing section E and the finishing section F of the continuous washing machine system A, respectively. , Separating each border.

  A drainage valve 42 is provided under the prewash tank 1 to discharge sewage. Moreover, the opening part 61 is provided in the outer cylinder of the inner and outer cylinders of the prewash tank 1, and when the supply amount of prewash water becomes large, prewash water overflows and is discharged | emitted from the opening part. The height of the opening can be adjusted, and is appropriately adjusted depending on the degree of dirt on the object to be washed. This opening is also provided for tanks 2-11.

Below, the washing | cleaning method of this invention is demonstrated about the case where the counter-flow-type continuous washing machine system A of FIG. 1 is used.
The pre-cleaning tank 1 is provided with an input B for the object to be cleaned, and one batch of the object to be cleaned 71 transferred by a conveyor or the like is input. A flush water supply valve 41 is provided in the vicinity of the inlet, and recycled water from the dehydrator and the rinsing tank is supplied as prewash water from the flash tank 24, while pushing the thrown object into the prewash tank 1. Pour.

  To-be-washed tank 1 is supplied with objects to be washed and pre-washing water, and from detergent stock tank 21, one batch of alkaline detergent is charged. Alkaline detergent is charged by a method in which detergent water stored in a cylinder is pushed in by air pressure. As the detergent introduced here, a neutral detergent or a mixed detergent of an alkaline detergent and a neutral detergent can be used instead of the alkaline detergent. The article to be washed in the prewash tank 1 is prewashed while being swung. At this time, by supplying an excess of prewash water, the prewash water overflows from the opening 61 together with the lump dirt (first prewash process).

  The object to be washed is washed in a prewash tank 1 over a predetermined time while swinging and supplying prewash water. At this time, the supply amount of the prewash water, the time until the drain valve at the bottom of the tank is opened, and the height of the opening 61 are adjusted so that a sufficient amount of water overflows.

  In one embodiment, after the first pre-washing is completed, the drain valve 42 at the lower part of the pre-washing tank is opened for a predetermined time to discharge the sewage (drainage). By this valve operation, fine dirt removed by the detergent is discharged together with the contaminated water. After the valve is closed again, pre-wash water is introduced and the second pre-wash is started. The purpose of this second pre-washing step is to rinse off the lump-like soil remaining in the first pre-washing, and it is not necessary to add detergent. However, if the dirt is strong, detergent may be added. Further, in this second pre-washing, it is not necessary to overflow the pre-washing water, but it is also preferable to carry out the overflow in the second pre-washing when there is a sufficient tact time and the dirt is severe.

  A scoop 91 serving as a transfer means is provided in the prewash tank 1, and by rotating the prewash tank 1 in one direction, the transfer scoop can scoop up the object to be washed and transfer it to the next main washing tank. At this time, the second prewash water remaining in the prewash tank without adhering to the object to be washed is used for prewashing the next batch.

  Therefore, one advantageous embodiment of the method according to the invention is characterized in that the first prewash, the subsequent draining, and the second prewashing after draining are performed as a set. Due to the rinsing effect of the second pre-wash after the first pre-wash, massive dirt brought into the next main wash tank is rapidly reduced, and highly reliable washing is possible. In the method of the present invention, the number of prewashes is not limited to two. If necessary, drainage and third prewash can be added after the second prewash, and the tact time can be spared. If there is, a fourth prewash is possible.

  If the flush water in the flush tank 24 has a margin, it is possible to discharge the pre-wash water remaining when moving to the next batch after opening the washing object by opening the drain valve 42. Yes, and as a result, better washing results can be expected.

  In FIG. 1, tanks 2 to 7 are main washing tanks that perform sufficient washing of the objects transferred from the pre-washing tank and are sterilized by a bactericide supplied from the tank 7. As for the washing water, recycled water is supplied to the tank 5, and the detergent liquid is supplied to the tank 4, for example. The washing water is flowed in a cascade from the tank 5 toward the tank 2. The object to be cleaned moves across the cascade. When it passes through the tank 6 and enters the tank 7, the detergent concentration rapidly decreases, the bactericidal agent concentration increases, the sterilization is performed efficiently, and the main washing is completed.

  The objects to be washed that have been sequentially washed and sterilized by the pre-washing and the subsequent main washing as described above are then rinsed in the rinsing step. As rinsing water, for example, tap water is poured into the tub 10, and this water is flowed in a cascade toward the tub 8, the objects to be washed are transferred into the tub 10, and rinsing is carried out according to a conventional method, and washing is completed. To do. The laundry to be washed is then dehydrated and dried by a dryer or the like. A drying method is not specifically limited, A well-known method is employable.

  In order to increase the effect of the detergent and disinfectant, heating of the washing water is effective. For this purpose, a steam pipe is installed (not shown), and steam is blown directly into the main washing tanks 2 to 7 to adjust the temperature while measuring the temperature with a thermometer.

  The processing speed in each tank is evaluated by tact time. Since the tact time is directly reflected in productivity and cost, it is preferable that the tact time is as short as possible. However, if the tact time is too short, removal of dirt, sterilization, and the like may not be sufficient. In the present invention, the tact time is preferably 1.5 to 20 minutes, more preferably 2 to 10 minutes, and further preferably 2 to 5 minutes. Here, the takt time means a residence time in the tank from the time when the object to be cleaned moves to each tank to the time when the object to be cleaned is transferred from the tank to the next tank. Therefore, for example, when water is charged, washed, and drained in the same tank, the time including these totals is used.

Here, in order to achieve the object of the present invention, it is necessary to overflow and discharge the sewage produced by the pre-washing. By making it overflow, the lump dirt which is hard to sink with the buoyancy of detergent foam etc. can be efficiently excluded from a prewash tank. In that case, it is particularly preferable to include the next step in one tact from the introduction of the object to be washed to the transfer to the next tank in the pre-washing tank in which overflow occurs.
(1) Supplying prewashing water (flush water), supplying detergent, and putting the object to be washed 71 into the prewashing tank 1 whose inner body is swung is washed (first prewashing).
(2) While washing, continue to supply and shake the pre-wash water to overflow.
(3) Close the flush water supply valve 41.
(4) Continue swinging and pre-washing even after stopping the flush water supply if necessary.
(5) Open the drain valve 42 at the bottom of the pre-wash tank and drain the dirty pre-wash water.
(6) Close the drain valve 42.
(7) Open the flush water supply valve 41 and supply prewash water.
(8) After pre-washing for a predetermined time (second pre-washing), scoop up the object to be washed with the scoop 91 and transfer it to the next tank.

  This process is schematically shown in FIG. Here, the timing of swinging the pre-washing tank, charging the object to be washed, supplying the pre-washing water, and starting the supply of the detergent does not necessarily have to be performed at the same time. The timing can be appropriately shifted.

  Next, the present invention will be described with reference to examples, but the present invention is not limited to these examples.

Prior to the examples, evaluation methods are shown below.
[Method for evaluating detergency] An object to be washed (cloth diaper) taken out from a nursing home was divided into 50 kg pieces and washed, dehydrated and dried under different washing conditions.
Washing was performed using LCBW-11 (tank number 11) manufactured by Tokyo Dyeing Machinery Co., Ltd. having the same structure as the washing machine of FIG. Wash and dry under the conditions shown in Tables 1 and 2 below, and if there is a stain, if there is a stain, perform a visual inspection of all items comparing the size and darkness with standard samples as inspection items. The defective product rate (re-washing rate) was calculated from the number of defective products according to the following formula.

    Re-washing rate (%) = [(number of defective products) ÷ (number of non-defective products + number of defective products)] × 100

Table 1 shows the formulations of the washing liquid and the sterilizing liquid.
In the finishing tank 11, a general commercially available softener was used.

The standard operating conditions of the washing machine are shown in Table 2.

Example 1
The time of each process in the prewash in a prewash tank is demonstrated, referring FIG.

While swinging the pre-washing tank, the flush water supply valve 41 is opened to supply flush water to the workpiece inlet (time t = 0), and at the same time, a predetermined amount of alkaline detergent is supplied to the pre-washing tank 1 (time T2 is 2 seconds). At the same time, one batch of the article to be washed 71 was put into the inlet, the article to be washed was poured into the prewash tank, and prewash (first prewash) was started. The supply of flush water at the time of the first pre-washing was also started at the same time as the article to be washed, and the supply was performed for 40 seconds (= T1). Here, in the middle of the flush water supply performed in parallel with the oscillation, the pre-wash water level overflows beyond the opening, but the flush water supply and the overflow are continued until a predetermined time (T1 = 40 seconds) is reached. Will continue. Thereafter, the pre-washing was continued while swinging for 88 seconds while the pre-wash water supply was stopped. After the first pre-washing until time T ₄ (= 128 seconds), the drain valve 42 at the bottom of the pre-washing tank is opened for T ₅ = 10 seconds, the sewage is discharged, the valve is closed, and the flush water supply valve 41 is turned on again. The second prewash was performed for T ₇ (= T ₆ ) for 10 seconds while opening and supplying flush water for T ₆ = 10 seconds. The object to be washed was then scooped up by scoop and transferred to tank 2 (main wash) for T ₈ = 20 seconds. From flash water supply started during the washing was put, tact T _O to transfer the end of the tank 2 was constant.

  Here, overflow was performed together with washing in the first pre-washing, the overflow water amount p was 270 liters, and the drainage amount q from the drain valve 42 was 245 liters. Here, the overflow water amount p and the drainage amount q from the drain valve were poured into the measuring tank from the respective pipes, and the amount of water was measured. Further, no overflow was performed in the second prewashing step. When washed in this manner, the re-washing rate was 5%.

Examples 2-4, Comparative Examples 1-3
A first pre-wash water feed time T ₁ in the first embodiment, except for changing the various changes are allowed by p / q, perform continuous washing experiments under the same conditions as in Example 1, they Examples 2-5, Comparative The results are shown in Table 3 as Examples 1 to 3.
Here, a re-washing rate of 5% or less was evaluated as a reference level for process quality.

Here, ○: Good, △: Pass level, ×: Bad

  From this result, it was found that when the value of p / q was 0.5 or more, the re-washing rate decreased rapidly and almost good results were obtained. Although it is possible to make the value of p / q higher, the decrease in the re-washing rate is reduced, but the replenishing amount of the pre-wash water is increased.

A Continuous washing machine system B Washing object inlet C Pre-washing part D Main-washing part E Rinsing part F Finishing part G Dehydrator 1 Pre-washing tank 2-7 Main-washing tank 8-10 Rinse tank 11 Finishing tank 12-14 Flow knot valve 21 Detergent stock tank 22 Disinfectant stock tank 23 Finishing agent stock tank 24 Flash tank 25 Recycled water distribution tank 26 Collection tank 31 Fresh water supply valve 32 Fresh water replenishment valve 33 Flush water supply line 34 Detergent supply line 35 Disinfectant supply line 36 Finishing agent supply line 37 Recycled washing water supply line 38 Recycled prewash water supply line 39 Recovered water prewash water supply line 41 Flush water supply valve
42 Prewash water drain valve 43 Main wash drain pipe 44 Recycle water line 45 Dehydration recovery pipe 51-54 Pump 61, 62 Opening 71 Washed object 80 Inner body 81 Projection 91 Scoop 92 Hole T ₀ Tact time T ₁ First prewash process Pre-wash water supply time T ₂ Detergent input time T ₃ Washing object input time T ₄ First pre-wash time T ₅ Drain valve opening time T ₆ Second pre-wash water supply time T ₇ Second pre-wash time T ₈ Transfer time

Claims (17)

  A method for laundering an item to be washed with a lump of dirt using a continuous washing machine system including at least one prewash tank and one or more main wash tanks, wherein lumpy dirt that floats in at least one prewash tank Washing while draining pre-wash water of the upper layer in the tank containing the above.   The method according to claim 1, wherein draining the pre-wash water of the upper layer in the tank is performed by overflow of the pre-wash water from the tank.   The method according to claim 1 or 2, wherein in the prewash tank for draining the prewash water in the upper layer in the tank, the prewash water in the lower layer in the tank is also drained.   The ratio (p / q) of the drainage amount (p) of the prewash water in the upper layer in the tank to the drainage amount (q) of the prewash water in the lower layer in the tank is 0.5 or more. How to wash. The pre-wash tank and main wash tank consist of inner and outer trunks,
The inner and outer cylinders have an opening for keeping the water level at a predetermined position on the outer cylinder,
Among the prewash tanks, at least the tank that drains the prewash water of the upper layer in the tank has a drainage valve that controls drainage from the drainage hole and the drainage hole at the bottom,
The pre-wash water drainage of the upper layer in the tank containing floating lump dirt is performed by supplying pre-wash water in an excessive amount rather than maintaining the water level below the opening, and draining the pre-wash water from the opening by overflow. The method according to claim 1, characterized in that:   The washing method according to claim 5, wherein in a prewash tank that drains the prewash water in the upper layer of the tank, the drainage valve is opened to drain water through the drain hole at the bottom of the prewash tank. In the pre-washing tank that drains the pre-wash water of the upper layer in the tank, one tact from the input of the washing object to the transfer to the next tank,
(1) Putting detergent and objects into the pre-wash tank, supplying pre-wash water into the pre-wash tank, and continuing to supply the pre-wash water, draining the pre-wash water from the opening by overflowing A first pre-washing step, including washing,
(2) The process of draining the prewash water by opening the drain valve of the prewash tank while the prewash water supply is continued or stopped.
(3) A second pre-washing process in which pre-wash water is supplied again and washed after the drain valve is closed.
(4) After the second pre-washing step, the step of transferring the article to be washed to the next tank,
The washing | cleaning method of Claim 5 or 6 characterized by the above-mentioned.   The washing method according to any one of claims 5 to 7, wherein a swing angle of the inner body is 200 ° to 300 ° in a prewash tank that drains prewash water of an upper layer in the tank.   The washing method according to claim 7 or 8, wherein drainage due to overflow of prewash water is performed only in the first prewash step.   The washing method according to claim 7 or 8, wherein drainage due to overflow of prewash water is performed in both the first prewash process and the second prewash process.   The ratio (p / q) of the drainage amount (p) of the prewash water in the upper layer in the tank to the drainage amount (q) of the prewash water in the lower layer in the tank is 0.5 or more. The washing method described.   The washing method according to any one of claims 7 to 11, wherein in the step (2), the drain valve is opened in a state where the supply of the pre-wash water is stopped.   The continuous washing machine system further includes one or more rinsing tanks downstream of the main washing tank, and drainage from any at least one of the rinsing tanks serves as prewash water, and drains prewash water of the upper layer in the tank. It supplies to the prewash tank to perform, The washing method as described in any one of Claims 1-12 characterized by the above-mentioned.   The continuous washing machine system further includes a dehydrator downstream of the main washing tank, and drainage from the dehydrator is supplied as prewash water to a prewash tank that drains prewash water in the upper layer of the tank. The washing method according to any one of claims 1 to 12.   The continuous washing machine system further includes one or more rinsing tubs and dehydrators downstream of the main tub, of which both drainage from at least one rinsing basin and drainage from the dehydrator are prewash water. The washing method according to claim 1, wherein the washing method is supplied to a prewash tank that drains prewash water of an upper layer in the tank.   The washing method according to any one of claims 1 to 15, wherein a continuous washing machine system in which the washing object is conveyed by a counter flow method is used.   The washing method according to any one of claims 1 to 16, wherein the item to be washed is a diaper and a cleaning towel.

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