JP2004237214A - Article washing method and apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an article washing method that can accurately wash all the area to be washed with a small number of jet nozzles and realizes low-cost facilities by reducing the number of jet nozzles and high-pressure pumps to be installed. <P>SOLUTION: The washing method where all the area to be washed of an article 1 is washed by flat jet flow jetted from two or more jet nozzles, 2a to 2d, each installed at a different position from each other in a perpendicular direction to relative movement of the article 1, is characterized by adjusting the washing capacity of each nozzle, that is, the distance between each nozzle, 2a to 2d and the surface to be washed according to the degree of difficulty in washing for the area to be washed corresponding to each nozzle, such as setting a jet nozzle close to a difficult area to be washed and setting a jet nozzle distant from an easy area to be washed, as well as compensating a washing area of each nozzle with each other, thus enabling all the area of the article to be washed with a small number of jet nozzles, 2a to 2d. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an article washing technique suitable for removing stubborn deposits such as labels and label sticking glues attached to the surface of an article such as a resin case. In particular, the present invention relates to an improved article cleaning technique so that the entire surface to be cleaned of an article can be accurately cleaned with a smaller number of spray nozzles.
[0002]
[Prior art]
A resin case used as a storage case for goods in the distribution process is often used with a label attached to the surface, and after use, it is collected and removed, and then reused. Is common. As a washing means for articles such as a resin case of this kind, a plurality of ejection nozzles forming a flat jet stream are used, and the flat jet stream jetted from the jet nozzles is sprayed on the surface of a relatively moving article. It is known that the entire surface to be cleaned is cleaned by attaching it (Patent Document 1). However, the peeling of the label from the case surface itself is relatively easy by manual work or by spraying a high-pressure jet stream, but the label sticking glue attached to the case surface remaining after the label is removed is more strongly adhered. And it was not technically easy to remove it cleanly. In particular, when another label is repeatedly applied on the glue that has not been completely removed, the glue sticks more and more and cannot be removed without using a very powerful jet stream. Was. In this respect, the prior art is no exception. In order to form a powerful jet necessary for removing stubborn deposits, not only a high-grade jet nozzle that can adapt to the jet but also a powerful high-pressure pump is required. And the equipment costs were high. Moreover, in order to reliably remove stubborn deposits, it is necessary to reduce the distance between the spray nozzle and the surface to be cleaned to some extent to maintain a large spraying force. It will be reduced naturally. Therefore, the number of injection nozzles and high-pressure pumps required for cleaning the entire cleaning range of the article also increases, and this also has a problem that the equipment cost increases.
[0003]
[Patent Document 1]
JP-A-52-103866.
[Problems to be solved by the invention]
By the way, the adhering matter adhering to the surface to be cleaned of the article is not limited to a stubborn adhering substance such as glue for label sticking, and there is also an easy-to-remove one such as mud and dust. It is common that adhering substances having different required cleaning difficulty levels are mixed. Therefore, it is not efficient to use a plurality of injection nozzles under the same spray condition as in the related art. The present invention has been developed with a focus on the conventional technical situation as described above, and by using a plurality of injection nozzles efficiently according to the difficulty of cleaning from a comprehensive viewpoint, a small number of It is an object of the present invention to provide an article cleaning technique capable of accurately cleaning the entire cleaning range by using a spray nozzle, thereby reducing the number of spray nozzles, high-pressure pumps, and the like to be installed, thereby reducing equipment costs.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides an article cleaning method for cleaning the entire cleaning range of an article by flat jets jetted from a plurality of jet nozzles provided at different positions in a direction orthogonal to the direction of relative movement of the article. In the technique, the distance between the injection nozzle and the surface to be cleaned is adjusted in accordance with the degree of difficulty of cleaning in each of the regions to be cleaned corresponding to the injection nozzles. Adjusts the cleaning power of each injection nozzle by bringing the injection nozzle closer and moving the injection nozzle away from the area to be cleaned that is easy to clean, complementing the cleaning range of each injection nozzle with each other, The technical means of cleaning the entire cleaning area of the article with a small number of spray nozzles was employed. Here, the entire cleaning range of the article refers to the range of the entire surface to be cleaned which is to be cleaned in the cleaning step. Incidentally, the ejection nozzle may be provided so as to be able to change the interval between the ejection nozzle and an adjacent ejection nozzle in a direction orthogonal to the relative movement direction of the article (claim 3). Further, the ejection nozzle may be provided so as to be displaced in the relative movement direction of the article between an ejection nozzle adjacent to the ejection nozzle in a direction orthogonal to the relative movement direction of the article.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
The cleaning technique according to the present invention can be widely applied not only to the above-described resin case but also to the case of removing deposits attached to the surface of various articles. In the state where the injection nozzle or the high-pressure pump is closest to the surface to be cleaned of the article, the injection nozzle or the high-pressure pump is most likely to be considered as the object to be washed, such as the adhesive for sticking a label strongly sticking to the resin case described above. One that can form a jet flow that can remove stubborn deposits that are difficult to clean is used. Regarding the number of installations, in consideration of the situation of the deposits adhering to the articles assumed in the cleaning system, when cleaning the area to be cleaned with low cleaning difficulty, the cleaning that can be covered when the corresponding injection nozzle is moved away. By examining the range and the like, the positional relationship of each injection nozzle is calculated by calculating the positional relationship so that the entire cleaning range of the article can be accurately cleaned. In this case, in the present invention, only the corresponding spray nozzle approaches the region to be cleaned having a high degree of difficulty in cleaning, and the reduced cleaning range moves away from the surface to be cleaned corresponding to the region to be cleaned having a low level of cleaning difficulty. Is complemented by the expanded cleaning range of the other spray nozzles, so that the installation interval between the spray nozzles in the direction orthogonal to the relative movement direction of the articles is extended to reduce the number of installations as compared with the prior art. It is possible to reduce. Since the number of installed high pressure pumps and the capacity can be reduced at the same time as the number of installed nozzles, the equipment cost can be reduced accordingly.
[0007]
The type of the cleaning liquid is not limited to ordinary water such as tap water or heated warm water, and may be a liquid in which an appropriate cleaning agent such as a surfactant is added to improve the cleaning power and the sterilizing power. Further, it is also possible to add an abrasive material made of an appropriate powder or the like to the cleaning liquid on the way to the spray nozzle or in the storage section, and improve the peeling force by the physical action. Regarding the type of the injection nozzle, it is possible to adopt a type in which a liquid flow composed of a cleaning liquid is injected, or a type in which a gas is mixed with the cleaning liquid and a gas-liquid mixed flow is injected in accordance with the type of the deposit. is there. As for the shape of the jet flow jetted from the jet nozzle, one that jets a flat wide jet stream is used. The ejection direction of the ejection nozzle may be a direction orthogonal to the relative movement direction of the article, or may be a direction inclined so as to face upstream in the relative movement direction of the article. Further, regarding the direction of the flat jet stream jetted from the jet nozzle, not only the form in which the width direction of the flat jet stream is vertically oriented so as to be orthogonal to the relative movement direction of the articles, but also the jet nozzle It is also possible to perform the cleaning while rotating the flat jet stream obliquely around the axis. With respect to the method of washing, the form may be such that one side of the article is washed, or both sides of the article are washed at the same time, the direction of the article is rotated 90 degrees in the horizontal direction on the downstream side, and the other washing apparatus is used. May be used to clean both sides. Furthermore, a form in which the four sides of the article are washed at the same time is also possible. However, in any case, the cleaning apparatus according to the present invention handles a plurality of injection nozzles for cleaning one surface as a unit. Regarding the position adjustment of the individual injection nozzles, a form manually operated as in the following embodiments or a form automated by a feed mechanism or the like may be used.
[0008]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic explanatory view exemplifying a cleaning state of each injection nozzle in an embodiment of the present invention. In the figure, reference numeral 1 denotes an article to be cleaned, such as a resin case, which is conveyed in a direction perpendicular to the paper surface. 2a to 2d and 3a to 3d show injection nozzles arranged on the left and right sides of the article 1 while changing the individual installation height. In the present embodiment, the injection nozzles 2a to 2d and 3a to 3d are provided such that the width direction of the injection flow is orthogonal to the relative movement direction of the article 1. These injection nozzles 2a to 2d and 3a to 3d are connected to high-pressure pumps (not shown), respectively, and are configured to perform cleaning by injecting a cleaning liquid at a predetermined pressure. As described above, the pressure of the cleaning liquid supplied to the jet nozzles 2a to 2d and 3a to 3d is such that a jet flow capable of removing stubborn deposits, which are assumed to be the most difficult to clean with respect to the article 1, can be formed. Set.
[0009]
As shown, in this example, a stubborn deposit having the highest cleaning difficulty adheres to the to-be-cleaned areas corresponding to the second ejection nozzles 2b and 3b from the top on both sides of the article 1, and the other areas Shows the case where a light deposit which is not so difficult to clean is attached. Incidentally, the position of the stubborn deposit having a high degree of difficulty in cleaning is generally almost constant in the same type of article, since the position where the label is attached is generally determined depending on the type of the article 1. However, in this example, the second injection nozzles 2b and 3b from the top are set close to the surface to be cleaned of the article 1, and the injection flow is sprayed from a short distance so that the cleaning difficulty is high and the stubbornness is high. Remove deposits. The other spray nozzles 2a, 2c, 2d, 3a, 3c, 3d are set so as to be away from the surface to be cleaned of the article 1 and spray a jet flow from a distant distance to remove light deposits. The large cleaning range complements the small cleaning range of the injection nozzles 2b and 3b. That is, the stubborn deposits and the light deposits are efficiently removed by the cleaning power according to the cleaning difficulty by the entire spray nozzles 2a to 2d and 3a to 3d, and the cleaning range is complemented by each other. Thus, the entire cleaning range 1 is properly cleaned.
[0010]
Incidentally, as is apparent from a comparison between the case of the present invention shown in FIG. 1 and the case of the prior art shown in FIG. 2, in the case of the present invention, it is necessary to clean the same article 1. The number of injection nozzles to be installed can be reduced by a total of two on both the left and right sides. This is because, in the case of the prior art, regardless of the difficulty of cleaning the deposits, all the spray nozzles 4a to 4e and 5a to 5e are capable of removing a strong jet flow that can remove stubborn deposits with high cleaning difficulty. This is due to the inefficient cleaning of spraying the article 1 from a short distance. That is, in the case of the prior art, a result that unnecessarily strong detergency is imparted to light deposits is obtained, and the entire spray nozzles 4a to 4e and 5a to 5e are brought close to the article 1. Accordingly, the number of spray nozzles required for cleaning the entire cleaning range of the article 1 increases. As described above, forming a powerful jet necessary for removing stubborn deposits requires not only an injection nozzle capable of adapting to the jet, but also a powerful high-pressure pump. Since the equipment cost is high, the reduction in the number of spray nozzles to be installed has a great effect. In particular, when a similar cleaning device is provided to change the direction of the article 1 on the downstream side and clean the other side surface, the effect is doubled.
[0011]
FIG. 3 is a schematic explanatory view illustrating another cleaning state of each injection nozzle in the embodiment of the present invention. In this example, the area to be cleaned corresponding to the third injection nozzle 2c from the top on the right side surface of the article 1, and the area to be cleaned corresponding to the second and third injection nozzles 3b and 3c from the left side. In this example, a stubborn deposit having the highest cleaning difficulty adheres to the surface, and a light deposit having a low cleaning difficulty adheres to the other region. In this example, the third injection nozzle 2c from the upper right and the second and third injection nozzles 3b and 3c from the upper left are set at positions close to the article 1, and the other injection nozzles 2a, 2b and 2d are set. , 3a and 3d are set at positions far from the article 1 for cleaning. As shown, the distance from the article 1 can be further changed between the ejection nozzle 3a and the ejection nozzle 3d as necessary. As described above, when the attachment position of the stubborn attachment having a high degree of difficulty in cleaning the article 1 changes, the position of the injection nozzle is adjusted according to the change in the position.
[0012]
Next, an embodiment of the present invention further embodied with reference to FIGS. 4 to 6 will be described. FIG. 4 is a front view showing a main part of one embodiment of the present invention, FIG. 5 is a plan view thereof, and FIG. 6 is a view taken in the direction of arrows AA. As illustrated, in the present embodiment, the case where the injection nozzles 2a to 2d are disposed on the right side of the guide rails 6 to 10 of the article 1 in order to clean the right side surface of the article 1 formed of the resin case is illustrated. Each of these injection nozzles 2a to 2d forms a flat jet that is wide in the vertical direction, and as shown in FIG. 4, the four flat jets form the entire vertical width of the right side surface of the article 1 in the vertical direction. To cover. The injection nozzles 2a to 2d are formed in a substantially U-shaped support member 13 fixed to a wall plate 12 in the middle of supply pipes 11a to 11d for supplying a cleaning liquid to the injection nozzles 2a to 2d. By fixing through the holes 14a to 14d, the distance between the article 1 and each of the spray nozzles 2a to 2d and their individual installation height can be adjusted. That is, when the supply pipes 11a to 11d are inserted into the elongated holes 14a to 14d and tightened and fixed by the nuts 15 and 16 from both sides, the articles 1 are adjusted by adjusting the axially tightened positions of the supply pipes 11a to 11d. The distance between each of the injection nozzles 2a to 2d can be adjusted, and the height of each of the injection nozzles 2a to 2d can be adjusted by adjusting the tightening position with respect to the long holes 14a to 14d. As shown in FIG. 6, the long holes 14a to 14d are formed so as to be displaced in the vertical and horizontal directions with respect to the support member 13, respectively, and as described above, each of the supply pipes 11a to 14d is formed. By inserting 11d and tightening with nuts 15 and 16 from both sides, the individual injection nozzles 2a to 2d are set in a state of being spaced apart in the vertical and horizontal directions as shown in FIGS. Will be. Therefore, the height of each of the injection nozzles 2a to 2d is set by adjusting the tightening position with respect to the long holes 14a to 14d on the assumption that the long holes 14a to 14d themselves are displaced in the height direction. Incidentally, reference numeral 17 in FIG. 5 denotes a connecting portion of the guide rail 7.
[0013]
Therefore, when the article 1 is washed, the article 1 and each of the injection nozzles 2a to 2d are taken into consideration, as described with reference to FIGS. The distance between the nozzles 2a to 2d corresponds to the degree of difficulty of cleaning the attached matter, and also complements the cleaning range of each of the individual injection nozzles 2a to 2d to cover the entire width of the article 1 in the vertical direction. After the position is set, cleaning is performed while the article 1 is being conveyed. FIG. 4 shows an example of the cleaning state. With such a configuration, it is possible to efficiently and accurately wash the entire cleaning range of the article 1 with a smaller number of spray nozzles. Incidentally, in this embodiment, only the right ejection nozzles 2a to 2d are shown. However, as illustrated in FIGS. 1 and 3, the same installation is possible for the left ejection nozzles 3a to 3d. Needless to say. Furthermore, it is also possible to change the direction of the article 1 to the horizontal direction on the downstream side and to wash the other side surface by a similar washing device.
[0014]
【The invention's effect】
According to the present invention, the distance between each of the injection nozzles and the surface to be cleaned is adjusted according to the degree of difficulty of cleaning in each of the regions to be cleaned corresponding to the individual injection nozzles, and the cleaning of the individual injection nozzles is performed. With the technical means of adjusting the force and complementing the cleaning range of the individual spray nozzles mutually, the individual spray nozzles work more efficiently, so that a smaller number of spray nozzles can reduce the total number of articles. The cleaning area can be cleaned. Therefore, it is possible to reduce the installation number of the injection nozzle, the high-pressure pump, and the like, thereby reducing the equipment cost.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view illustrating a cleaning state of each injection nozzle in an embodiment of the present invention.
FIG. 2 is a schematic explanatory view exemplifying a cleaning state of each injection nozzle in a conventional technique.
FIG. 3 is a schematic explanatory view illustrating another cleaning state of each spray nozzle in the embodiment of the present invention.
FIG. 4 is a front view showing a main part of the embodiment of the present invention.
FIG. 5 is a plan view of the embodiment.
6 is a view as viewed in the direction of arrows AA in FIG. 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Article, 2a-2d, 3a-3d, 4a-4e, 5a-5e ... Injection nozzle, 6-10 ... Guide rail, 11a-11d ... Supply pipe, 12 ... Wall plate, 13 ... Support member, 14a-14d ... Long holes, 15, 16 ... Nuts, 17: Connection of guide rail

Claims (4)

In an article washing method for washing the entire washing range of an article by flat jets jetted from a plurality of jet nozzles provided at positions shifted in a direction orthogonal to the relative movement direction of the article, each of the jet nozzles corresponding to the jet nozzle The distance between the spray nozzles and the surface to be cleaned is adjusted according to the difficulty of cleaning in the region to be cleaned. By moving the spray nozzles away from the cleaning area, the cleaning power of each spray nozzle is adjusted, and the cleaning range of each spray nozzle is complemented with each other. An article washing method, comprising washing an article. In an article washing apparatus for washing the entire washing range of an article by flat jets jetted from a plurality of jet nozzles provided at positions shifted in a direction orthogonal to the relative movement direction of the article, each of the jet nozzles is provided with an object nozzle. The distance between the cleaning surface and the cleaning surface is provided so as to be adjustable, and by adjusting the distance according to the difficulty of cleaning in each of the regions to be cleaned corresponding to those injection nozzles, the cleaning power of each of the injection nozzles An article cleaning apparatus characterized in that the cleaning range of each injection nozzle is complemented with each other and the entire cleaning range of the article can be cleaned with a small number of injection nozzles. 3. The article cleaning apparatus according to claim 2, wherein the ejection nozzle is provided so as to be able to change an interval between the ejection nozzle and an adjacent ejection nozzle in a direction orthogonal to a relative movement direction of the article. 4. The article cleaning apparatus according to claim 2, wherein the ejection nozzle is provided at a position shifted in a relative movement direction of the article between the ejection nozzle and an ejection nozzle adjacent in a direction orthogonal to the relative movement direction of the article. 5.

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