JP2010168731A - Lid for pit or manhole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid for a pit or a manhole, which can present a full-color and multi-color design while maintaining a nonslip function brought about by irregularities formed on a top surface, and which can prevent the color fading of the design. <P>SOLUTION: The lid 10 includes a lid body 12, the top surface 12a of which has the irregularities. A printed layer 14 is formed on the top surface 12a of the lid body 12 by using an inkjet printer (30). A coating layer 16 having water repellency is formed on the top surface of the printed layer 14. Since the thickness of the printed layer 14 and that of the coating layer 16 are smaller in dimension than the height of the irregularities of the top surface 12a of the lid body 12, an irregular shape of the top surface 12a is left as-is. Additionally, the coating layer 16 having the water repellency prevents the intrusion of water into the printed layer 14. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lid for a bag or a manhole, and more particularly, to a lid for a bag or a manhole, for example, in which unevenness for preventing slip is formed on an upper surface.

  Conventionally, unevenness for preventing slipping is formed on the upper surface of a lid used for a bag or a manhole. Since these lids are often installed by local governments, there is a case where a design designated by each local government is expressed on the upper surface of the lid using the unevenness. Some of the designs are colored by applying paint to the recesses on the top surface of the lid.

  In addition, paying attention to the publicity of these lids, techniques for using these lids as advertising media have also been proposed. For example, in the technique of Patent Document 1, a recess having a predetermined size is provided on the outer surface of a manhole cover, and an advertisement medium such as a neon tube device and a hologram image is detachably fitted and fixed in the recess. The advertising medium is protected from road loads and impacts by a transparent plate provided on the advertising medium.

  Moreover, in the technique of patent document 2, the 2 layer structure of a lid | cover main body and a surface layer part is employ | adopted, the surface layer part is supported by the cover body so that attachment or detachment is possible, and the surface is made up with a required drawing. For example, the surface layer portion has a decorative surface that is a drawing drawn by photography or printing, and the drawing is protected by a wear-resistant material such as ceramic.

JP 2002-188169 A [E02D 29/14] JP-A-6-158664 [E02D 29/14]

  When expressing the design using the unevenness formed on the upper surface of the lid, a dedicated mold is required for each design, so not only the time required for mold production is required, but also a small amount of lid This is not profitable and expensive. In addition, the design that can be expressed by the irregularities on the upper surface is quite limited, and even if paint is poured into the concave portions and coloring is performed, the color often drops due to rain or the like. Furthermore, since the uneven shape changes depending on the design, there is a possibility that the anti-slip function cannot be exhibited properly, and it is dangerous if a pedestrian or the like passes through it.

  Moreover, in the technique of patent document 1, although the upper surface of a lid | cover is covered with the transparent plate, since the unevenness | corrugation is not formed there, it does not have a slip prevention function at all. In addition, since the advertising medium is fitted into the lid and the transparent plate is provided thereon, the number of parts is increased, and manufacturing takes time and cost.

  Furthermore, in the technique of Patent Document 2, as in the technique of Patent Document 1, the number of parts increases, and manufacturing takes time and cost. In addition, Patent Document 2 describes that it is desirable to impart a slip resistance by forming a ceramic or an appropriate resin layer on the surface of the relief layer, but no specific mode is described. Therefore, it is unclear whether the lid according to the technique of Patent Document 2 has an anti-slip function.

  Therefore, the main object of the present invention is to provide a novel lid for a bag or manhole.

  Another object of the present invention is to provide a lid for a bag or manhole, which can cope with various designs while maintaining an anti-slip function and hardly causes discoloration.

  Still another object of the present invention is to provide a lid for a bag or manhole that can reduce the manufacturing cost.

  The present invention employs the following configuration in order to solve the above problems. Note that reference numerals in parentheses and supplementary explanations indicate correspondence with embodiments described later in order to help understanding of the present invention, and do not limit the present invention.

  1st invention is provided with the cover body in which the unevenness | corrugation for anti-slip | skid is formed in an upper surface, the printing layer formed in the upper surface of a cover body, and the coating layer which is formed in the upper surface of a printing layer, and has water repellency, It is a lid for a bag or manhole.

  In the first invention, the lid (10) is a lid used for an underground structure (50) such as a fence and a manhole, and the lid (12) is provided with unevenness for slip prevention on its upper surface (12a). )including. A printing layer (14) is formed on the upper surface of the lid using an inkjet printer (30), and a water-repellent coating layer (16) is formed on the upper surface of the printing layer. The thickness of the printing layer and the covering layer is thinner than the height of the unevenness formed on the upper surface of the lid, and the uneven shape on the upper surface of the lid remains almost as it is.

  According to the first invention, a variety of designs can be expressed while maintaining the anti-slip function due to the unevenness formed on the upper surface of the lid. In addition, since it is not necessary to manufacture a dedicated mold for each design, it can be manufactured in a short period of time and the manufacturing cost can be reduced.

  Furthermore, by forming a coating layer having water repellency, moisture such as rain can be prevented from entering the printing layer, and color fading or fading of the printing layer can be delayed.

  The second invention includes a lid, a printed layer formed on the upper surface of the lid, a coating layer formed on the upper surface of the printed layer and having water repellency, and a non-slip bone disposed on the upper surface of the coating layer It is a lid for a bag or manhole provided with a material.

  In 2nd invention, a lid | cover (10) contains a cover body (12) and is used for underground structures (50), such as a fence and a manhole. A printing layer (14) is formed on the upper surface of the lid using an inkjet printer (30), and a water-repellent coating layer (16) is formed on the upper surface of the printing layer. Moreover, a granular aggregate (18) is arranged on the upper surface of the coating layer (16). By arranging the aggregate on the upper surface of the covering layer, irregularities are formed on the upper surface of the lid. For example, if a lid body with anti-slip irregularities formed on the upper surface (12a) is used, the irregularities are further formed on the irregularities of the lid itself, so that the anti-slip function is more appropriate. Demonstrated.

  According to the second invention, the unevenness is formed on the upper surface of the lid by the aggregate, so that the anti-slip function can be appropriately exhibited.

  Further, like the first invention, various designs can be expressed, and the manufacturing cost can be reduced. Furthermore, by forming a coating layer having water repellency, discoloration of the printed layer can be reduced.

  The third invention is dependent on the first or second invention, and a base layer having water repellency is further formed on the lower surface of the printed layer.

  In the third invention, the printed layer (14) is formed on the upper surface (12a) of the lid (12) via the base layer (22) having water repellency. That is, the printing layer is formed so as to be sandwiched between the base layer having water repellency and the coating layer (16). This prevents water from entering the periphery of the printing layer.

  If water permeates between the lid and the printing layer, when the water vaporizes and the volume increases, the printing layer may be cracked or cracked. According to the third invention, Since water can be prevented from entering between the lid and the printed layer, this problem can be prevented.

  According to the present invention, it is possible to provide a lid for a bag or manhole, which can cope with various designs while maintaining an anti-slip function and hardly causes color fading. Moreover, the manufacturing cost can also be reduced.

  The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is a top view which shows one Example of the lid | cover for a bag or manhole of this invention. It is sectional drawing of the lid | cover of FIG. 1, (A) shows the mode of the whole cover cross section, (B) shows a mode that a part of cover cross section was expanded. It is a schematic sectional drawing which shows a mode that the cover of FIG. 1 was installed in the underground structure. It is a top view which shows the other Example of the lid | cover for ridges or manholes of this invention. It is sectional drawing of the lid | cover of FIG. 4, (A) shows the mode of the whole lid | cover cross section, (B) shows a mode that a part of lid cross section was expanded. It is an illustration figure which shows the structure of the outline of an inkjet printer. It is sectional drawing which shows the further another Example of the lid | cover for ridges or manholes of this invention, (A) shows the mode of the whole lid | cover, (B) shows a mode that a part of lid | cover was expanded.

  Referring to FIGS. 1 and 2, a lid 10 according to an embodiment of the present invention includes a lid 12 and a printing layer 14 formed on an upper surface 12a thereof. As shown in FIG. 3, the lid 10 is a lid used for a dredging such as a rainwater tank and a sewage tank, and an underground structure 50 such as a manhole, and its upper surface is exposed to the ground surface 52.

  The lid body 12 is a general-purpose lid formed of a synthetic resin such as hard vinyl chloride using a mold. The shape of the lid body 12 is appropriately set according to the shape of the opening such as a ridge to be applied, and includes an appropriate shape formed in a circular shape or a square shape in a plan view. The diameter of the lid 12 is, for example, 75 mm to 600 mm, and preferably 75 mm to 200 mm. Further, the height of the lid 12 is, for example, 10 mm to 350 mm, and desirably 10 mm to 50 mm. Further, the top surface 12a of the lid body 12 is provided with unevenness, and the antislip effect is exhibited by the unevenness. The height of the unevenness of the upper surface 12a is, for example, 0.5 mm-10 mm, and preferably 1.0 mm-3.0 mm. If the height of the unevenness is too high, the formation of the printing layer 14 to be described later is hindered, and if it is too low, the anti-slip effect is impaired, but by adopting the height of the unevenness within such a range, the printing layer 14 can be appropriately formed, and an anti-slip effect is appropriately exhibited. In addition, the uneven pattern on the upper surface 12a can be a conventional standard one that is set so that the anti-slip effect can be appropriately exhibited, or is set to express a predetermined design, It is not limited to the pattern shown in FIG.

  The printing layer 14 is formed on the upper surface 12a of the lid 12 by using an inkjet printer 30 that uses UV (ultraviolet) curable ink, which will be described in detail later. That is, the printing layer 14 is formed of UV curable ink and expresses a variety of designs in full color. In FIGS. 1 and 2, the printing layer 14 is formed over the entire upper surface 12a of the lid 12, but as shown in FIGS. 4 and 5, it is formed only on a part of the upper surface 12a. You can also.

  A coating layer 16 having water repellency and transparency is formed on the upper surface of the printing layer 14. The coating layer 16 is formed of a material such as a thermosetting type, a UV curable type, or a photocurable type, and covers the entire upper surface of the printing layer 14 in a thin film shape. The material of the coating layer 16 is not particularly limited as long as it is cured so as to have water repellency and transparency. For example, urethane acrylate resin, epoxy acrylate resin, epoxy compound, oligoester acrylate resin, photosensitive polyimide, A material containing aminoalkylide, phenol resin, urea resin, melamine resin and the like as main components can be appropriately selected and used. Among these, it is particularly preferable to use a material containing a component contained in the ink forming the printing layer 14. This is because the binding force (adhesive force) between the printing layer 14 and the coating layer 16 is improved. In this example, modified polyurethane acrylate resin sold by Aika Industries Co., Ltd. is 30-35%, butyl acetate is 30-35%, methyl ethyl ketone is 35-40%, and appropriate additives are about 1-5%. The coating layer 16 was formed with the material mixed in the ratio of.

  As the additive, for example, an ultraviolet absorber such as tinuvin (benzotriazole) sold by Ciba Japan Co., Ltd., or a light dispersing agent such as alumina which is a water-soluble metal can be used. These additives can be used alone, or a plurality of types of additives can be used in combination. For example, when the printing layer 14 is formed using UV curable ink, the ink fading or the ink film is deteriorated by receiving ultraviolet rays. However, by using an ultraviolet absorber or a light dispersant as an additive for the coating layer 16, ultraviolet rays are absorbed or reflected and dispersed by the coating layer 16, thereby preventing the ultraviolet rays from reaching the printing layer 14. And fading and deterioration of the printing layer 14 due to ultraviolet rays can be reduced.

  As shown in FIGS. 4 and 5, when the printing layer 14 is formed only on a part of the upper surface 12 a of the lid 12, the covering layer 16 is formed only on the upper surface of the printing layer 14. Alternatively, the covering layer 16 may be formed also on the upper surface 12a of the lid 12 where the printing layer 14 is not formed. For example, the covering layer 16 can be formed so as to cover the entire top surface 12 a of the lid 12 regardless of the size of the printing layer 14.

  A granular aggregate 18 is disposed on the upper surface of the covering layer 16. As the aggregate 18, ceramic, mineral, synthetic resin and the like that are excellent in transparency can be used. The particle size of the aggregate 18 is appropriately set according to the height and width of the unevenness of the upper surface 12a of the lid 12, and is, for example, 50-300 μm. These may have a substantially single diameter, or may be a mixture of different diameter ranges. In this example, resin beads having a particle diameter of 150-250 μm mixed at a ratio of 65-85% and a particle diameter of 75-150 μm mixed at a ratio of 15-35% were used.

  Furthermore, a protective layer 20 is formed on the upper surface of the covering layer 16 on which the aggregate 18 is disposed to cover the entire upper surface in a thin film shape. The protective layer 20 is not particularly limited as long as it has excellent wear resistance and durability, that is, excellent strength and transparency. In this example, the protective layer 20 was formed of a material in which 45 to 55% of the modified polyurethane acrylate resin, 40 to 45% of the acrylic monomer, and an appropriate additive were mixed at a ratio of about 1 to 5%.

  The configuration of the inkjet printer 30 (hereinafter simply referred to as “printer 30”) will be briefly described below. As shown in FIG. 6, the printer 30 includes a computer 32, a support base 34, a print head 36, a UV lamp 38, and the like.

  The computer 32 controls the operation of the printer 30. For example, the computer 32 acquires design information such as photographs and prints read using a scanner and images created using image processing software, and drives and controls the print head 36 and the like based on the acquired design information. To do.

  The support table 34 is a table on which the lid body 12 is placed. The support base 34 supports the lid 12 while suctioning it with a vacuum so that the lid 12 is not displaced.

  The print head 36 is provided above the support base 34 and ejects UV curable color ink from a plurality of nozzles (not shown). The print head 36 moves in an arbitrary direction parallel to the upper surface of the support base 34 in accordance with an instruction from the computer 32, and ejects color ink from the nozzles of the first head at a predetermined timing. Then, a color ink is landed on a predetermined portion of the upper surface 12a of the lid 12 to draw a desired design.

  The UV lamp 38 is provided on one side or both sides of the print head 36, moves integrally with the print head 36, and irradiates ultraviolet rays according to an instruction from the computer 32.

  However, it is also possible to adopt a configuration in which the first head of the print head 36 and the UV lamp 38 are not moved together, but are moved separately. Further, the print head 36 and the like are moved in the left-right direction, and the upper portion of the support base 34 is moved in the front-rear direction, so that the print head 36 and the like are relatively moved in an arbitrary direction parallel to the upper surface of the support base 34. You may do it.

  A method of manufacturing the lid 10 by forming the printing layer 14 on the upper surface 12a of the lid 12 using such a printer 30 will be described below.

  Specifically, first, the lid body 12 is arranged on the support base 30 with the upper surface 12 a of the lid body 12 facing upward. Next, white ink is ejected from the first head of the print head 36 onto the upper surface 12a of the lid body 12, and backing printing with white ink is performed in accordance with the shape of the desired design. By this backing print, the transparent or colored lid 12 can be beautifully expressed in full color. Subsequently, after the color ink is ejected from the first head of the print head 36 and a desired design is drawn on the upper surface 12 a of the lid 12, ultraviolet rays are irradiated by the UV lamp 38. As a result, the color ink is solidified and the printing layer 14 is formed. Thus, by using the printer 30, a full color design can be easily applied to the upper surface 12 a of the lid 12.

  Subsequently, the coating layer 16 is sprayed on the upper surface of the printing layer 14 using a spray gun or the like, or the coating layer 16 is applied using a brush or the like. And after spraying the aggregate 18 on the upper surface of the coating layer 16, the coating layer 16 is solidified by applying heat irradiation, ultraviolet irradiation or light irradiation to the coating layer 16 under predetermined conditions. To fix. Finally, the protective layer 20 is sprayed or applied to the upper surface of the covering layer 16 on which the aggregate 18 is disposed, and the lid 10 is formed by solidifying by an appropriate means. The covering layer 16 and the protective layer 20 can also be formed by using the printer 30 similarly to the printing layer 14.

  Since the thicknesses of the printed layer 14, the covering layer 16 and the protective layer 20 formed in this way are thin compared to the height of the unevenness formed on the upper surface 12 a of the lid 12, the uneven shape of the upper surface 12 a is almost as it is. Remain. Further, by disposing the aggregate 18 on the upper surface of the covering layer 16, unevenness is further formed on the unevenness of the lid 12 itself.

  According to this embodiment, it is possible to express a variety of designs in full color while maintaining the anti-slip function due to the unevenness formed on the upper surface 12a of the lid 12. In addition, since the unevenness can be further formed by providing the aggregate 18, the anti-slip effect can be improved. Therefore, even if a pedestrian, a bicycle, or the like passes on the lid 10, the anti-slip effect is properly exhibited, and the pedestrian or the like is prevented from falling, and safety is maintained.

  Further, by forming the coating layer 16 having water repellency, moisture such as rain can be prevented from entering the printing layer 14, and discoloration or fading of the printing layer 14 can be delayed. Furthermore, by forming the protective layer 20, wear resistance and durability can be improved, and the aggregate 18 can be prevented from peeling off. Furthermore, since the ultraviolet rays are reflected and dispersed by using resin beads as the aggregate 18, the ultraviolet rays can be prevented from reaching the printing layer 14, and the fading and deterioration of the printing layer 14 due to the ultraviolet rays can be reduced. Can be improved.

  In addition, according to this embodiment, since various designs can be delicately expressed, the lid 10 can be used as an advertising medium in commercial facilities and various information can be transmitted from the lid 10. Conversely, for example, by adopting a design such as asphalt or tiles according to the surrounding road surface such as a manhole where the lid 10 is installed, the lid 10 is blended into the surrounding scenery and the aesthetics of the cityscape is maintained. It can also be used. Also, instead of using the same pattern as the road surface, it is possible to express the beauty of the new cityscape by adopting an appropriate design that harmonizes with the surrounding scenery.

  Furthermore, since it is not necessary to manufacture a dedicated mold for each design, it is possible to manufacture in a short period of time without requiring a period required for manufacturing the mold, and to reduce the manufacturing cost. For example, it is only necessary to employ one type of lid 12 on which irregularities that are optimal for exhibiting the anti-slip effect are employed, and to print various desired designs. In addition, since full-color printing is performed directly on the lid 12, another member other than the lid 12 is not required, and it does not take time to manufacture, and the manufacturing cost can be reduced.

  Further, when it is necessary to change the design of the printed layer 14 of the lid 10, a new design can be expressed by further overwriting the printed layer 14 or the like on the lid 10. Further, the lid 10 itself may be replaced to express a new design. Compared to the weight of the synthetic resin used for the lid 12, the weight of the material used for the printed layer 14 is small, so the used lid 10 can be used for recycling as it is, There is no waste of resources.

  In the above-described embodiment, the lid 12 made of synthetic resin is used. However, the lid 12 can be formed of a metal such as cast iron, ceramic, or the like. Moreover, in the above-mentioned Example, the printing layer 14 was formed using UV curable ink. This is because the UV curable ink has high adhesion to the synthetic resin and can be directly printed on the synthetic resin lid 12, but the ink used for forming the printing layer 14 is UV curable ink. It is not limited to ink, and various inks such as water-based and solvent-based inks can be used.

  In the above-described embodiment, the printing layer 14 is directly formed on the surface 12a of the lid body 12, but the printing layer 14 can also be formed via the base layer 22, as shown in FIG. That is, after forming the base layer 22 on the upper surface 12 a of the lid 12, the print layer 14 and the cover layer 16 are formed thereon, so that the print layer 14 is sandwiched between the base layer 22 and the cover layer 16. You can also

  The underlayer 22 is preferably one having water repellency. For example, the underlayer 22 can be formed using a resin such as acrylic silicon, epoxy, or urethane. Among these, it is particularly preferable to use a material containing a component contained in the ink forming the printing layer 14. This is because the binding force between the base layer 22 and the print layer 14 can be improved.

  Further, by providing the base layer 22 with water repellency, water can be prevented from entering between the upper surface 12 a of the lid 12 and the printing layer 14. When water enters between the lid 12 and the printing layer 14 and then the sunlight is irradiated, for example, when the water vaporizes and the volume increases, the printing layer 14 swells, and the printing layer 14 However, this problem can be prevented by providing the base layer 22 with water repellency. Of course, the color fading of the printing layer 14 due to the intrusion of moisture into the printing layer 14 can also be delayed.

  When forming the base layer 22, it is preferable to roughen the upper surface before forming the printing layer 14. For example, the upper surface of the base layer 22 may be roughened by polishing with sandpaper having a roughness of about 80-400. Specifically, when using No. 120 sandpaper, the upper surface of the underlayer 22 may be rubbed several times with a pressure of about 2 kg. As described above, by roughening the upper surface of the underlayer 22, that is, the contact surface with the print layer 14, the binding force between the underlayer 22 and the print layer 14 can be further improved.

  Further, in each of the above-described embodiments, the lid 12 having an unevenness formed on the upper surface 12a is used. However, when the aggregate 18 is arranged on the covering layer 16, the aggregate 18 prevents slipping. Since the function can be exhibited, it is not always necessary to use the lid body 12 with the irregularities formed on the upper surface 12a. For example, the lid body 12 having a flat upper surface 12a can be used.

DESCRIPTION OF SYMBOLS 10 ... Lid 12 ... Lid 12a ... Upper surface of lid 14 ... Print layer 16 ... Cover layer 18 ... Aggregate 20 ... Protective layer 22 ... Underlayer 30 ... Inkjet printer

Claims (3)

A lid body with anti-slip irregularities formed on the upper surface;
A lid for a bag or a manhole, comprising: a printing layer formed on an upper surface of the lid body; and a coating layer formed on the upper surface of the printing layer and having water repellency. Lid,
A printing layer formed on the upper surface of the lid,
A lid for a bag or manhole, comprising: a coating layer formed on an upper surface of the printed layer and having water repellency; and an anti-slip aggregate disposed on the upper surface of the coating layer.   The lid for a bag or manhole according to claim 1, wherein an undercoat layer having water repellency is further formed on the lower surface of the print layer.

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