FIELD OF THE INVENTION
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The present invention relates to a method for the attaching and removing of a masking member.
DESCRIPTION OF THE PRIOR ART
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When a surface treatment such as coating, plating, and the like are effected on a surface of an article, if said surface has parts where said surface treatment should not be effected such as bracket attaching parts, water exhausting holes, and the like, it is necessary to protect said parts by masking members before said surface treatment.
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Hitherto, adhesive tape has been used as a masking member. Nevertheless, it may take much labor to attach and remove adhesive tapes to said masking parts. Accordingly, a masking member using polystyrene foam as a material is provided instead of adhesive tape (for instance, Tokkai Sho 64-43376).
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As this kind of masking member, a masking member (1)A consisting of a panel body (2)A on whose underside an adhesive layer (3)A is coated as shown in Fig.8, a plug type masking member (1)B consisting of a flange part (3)B as shown in Fig.9, a masking member (1)C consisting of a cylindrical body having an inserting hole (3)C as shown in Fig.10, a masking; member (1)D consisting of a panel body (2)D having a pinching ditch (3)C having a taper shape in the entrance of said pinching ditch (3)C as shown in Fig.11, a masking member (1)E consisting of a vessel body (2)E having a knob (3) E standing from the botton of said vessel body (2)E as shown in Fig.12, a masking member (1)F standing from the top of said vessel body (2)F as shown in Fig.13, and the like are provided.
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And said masking member (1)A is used in a case where the masking part is a plane, said masking member (1)B and said masking member (1)E are respectively used in a case where the masking part is a hole, said masking member (1)C is used in a case where said masking part is a projection or pole, said masking member (1)D is used in a case where said masking part is a panel, and said masking member (1)F is used in a case where said masking part is a projection.
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Nevertheless, for instance, in a case where a corrosion, vibration, and sound-proof coating is effected on the underside of a car-body, said masking parts may be more than 200 parts for each car-body. Therefore it has been a very significant problem of how to attach quickly and surely said masking members to said masking parts.
DISCLOSURE OF THE INVENTION
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The present invention provides a method for the attaching or removing of a masking member where said masking member is attached and removed by pinching said masking member by a pincers as a means of solving said problem of the prior art.
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Said many types of masking members are pinched by said pincers to attach and remove to/from said masking parts. Said pincers can hold said masking members mechanically. Accordingly, in the present invention, the mechanically attaching and removing of a masking member without work by hand has become possible and a fully automatic process of surface treatmemt using a masking member can be attained.
BRIEF DESCRIPTIONS OF THE DRAWINGS
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Fig.1 to 7 show the embodiment of the present invention and Fig.1 is a front view of a pincers, Fig.2 is a diagram showing the attaching and removing of said masking member (1)A, Fig.3 is a diagram showing the attaching and removing of said masking member (1)B, Fig.4 is a diagram showing the attaching and removing of said masking member (1)C, Fig.5 is a diagram showing the attaching and removing of said masking member (1)D, Fig.6 is a diagram showing the attaching and removing of said masking member (1)E, Fig.7 is a diagram showing the attaching and removing of said masking member (1)F, Figs.8 to 13 show many types of masking members and Fig.8 is a perspective view of said masking member (1) A, Fig.9 is a perspective view of said masking member (1)B, Fig.10 is a perspective view of said masking member (1)C, Fig.11 is a perspective view of said masking member (1)D, Fig.12 is a perspective view of said masking member (1)E, and Fig.13 is a perspective view of said masking member (1)F.
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In the drawings, (1)A, (1)B, (1)C, (1)D, (1)E, (1) F.... masking members.
- (10) .... pincers.
- (20) .... article.
- (21 )A, (21 )B, (21 )C, (21 )D, (21 )E, (21)F .... masking parts.
DETAILED DESCRIPTION
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Referring now to Fig.1 to 7 each showing an embodiment of the present invention, a pincers (10) comprise a Y-shaped supporting frame (11), a a pair of movable arms (12), (12) pivotally attached to the ends of said frame (11), spikes (12)A, (12)A respectively formed at the ends of said movable arms (12), (12), a magnetic cylinder (13) connected to the root of said supporting frame (11), and links (14), (14) connecting a piston rod (13)A of said magnetic cylinder (13) with said movable arms (12), (12).
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To attach or remove said masking member (1)-A to a plane masking part (21 )A of an article (20) to be effected by a surface treatment by said pincers (10), said magnetic cylinder, (13) comes into action to pull said piston rod (13)A into said magnetic cylinder (13) as shown in Fig.2, and said movable arms (12), (12) are closed reciprocally by said links (14), (14) to stick said spikes (12)A, (12)A into the side of said panel body (2)A of said masking member (1)A and thus said masking member (1)A is held by said pincers. Said masking member is attached to said masking part (21 )A of said article (20) by said adhesive layer (3)A.
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To attach or remove said masking member (1)-B into a hole (21)B of said article (20) by said pincers (10), said spikes (12)A, (12)A of said movable arms (12), (12) of said pinchers (10) are pressed into the sides of said masking member (1)B to hold said masking member (1)B by said pincers (10) as shown in Fig.3 the same as the case of said masking member (1)A. Said masking member (1)B is attached into said hole (21)B of said article (20) by inserting said inserting part (3)B into said hole (21 )B.
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To attach or remove said masking member (1)-C to a projection (21)C said article (20) by said pincers (10), said spikes (12)A, (12)A of said movable arms (12), (12) of said pincers (10) are pressed into the side of said masking member (1)C to hold said masking member (1) C by said pinchers (10) as shown in Fig.4 the same as the case of said masking member (1)A. Said masking member (1)C is attached to said projection (21)C by inserting said projection (21)C into said inserting hole (3)C of said masking member (1)C.
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To attach and remove said masking member (1)D to/from a panel masking part (21)D of said article (20) by said pincers (10), said spikes (12)A, (12)A of said movable arms (12), (12) of said pincers (10) are pressed into the upper and lower surfaces of said masking member (1)D to hold said masking member (1)D by said pincers (10) as shown in Fig.5 the same as the case of said masking member (1)A. Said masking member (1)D is attached to said panel masking part (21 )D of said article (20) by inserting said panel masking part (21)D into said pinching ditch (3)C of said masking member (1) D.
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To attach or remove said masking member (1)-E to a hole (21)E of said article (20) by said pincers (10), said spikes (12)A, (12)A of said movable arms (12), (12) of said pincers (10) are pressed into the side of said knob (3)E of said masking member (1)E to hold said masking member (1)E by said pincers (10) as shown in Fig.6 the same as the case of said masking member (1)A. Said masking member(1)E is attached to said hole by inserting said vessel body (2)E into said hole (21)E.
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To attach or remove said masking member (1)-F to/from a projection (21 )F of said article (20) by said pincers (10), said spikes (12)A, (12)A of said movable arms(12), (12) of said pincers (10) are pressed into said knob (3)F of said masking member (1)F to hold said masking member (1)F by said pincers (10) as shown in Fig.7 the same as in the case of said masking member (1) A. Said masking member (1)F is attached to said projection (21 )F by covering said projection (21)F with said vessel body (2)E.
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In the present invention, an oil pressure cylinder, an air cylinder, a motor, and the like may be used as a power source instead of said magnetic cylinder. Further, in the present invention, a friction material such as cloth, rubber, and the like may be attached to the inside of the ends of said movable arms (12), (12) or knurling may be administered to the inside of the ends of said movable arms (12), (12) instead of spikes (12)A, (12)A.
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In the present invention, a further masking member shown in Figs.8 to 13 may be used. As materials for said masking members, a thermoplastic resin such as polyethylone, polypropylone, ethlene-propylene copolymer, polyvinylchloride, polyvinylidene chloride copolymer, polystyrene, polymethacrylate, acrylonitrile-styrene-butadiene copolymer; a foam of said thermoplastic resin, a thermosetting resin such as melamine resin, urea resin, phenol resin, epoxy resin, unethare resin, and the like or a foam of said thermosetting resin; a synthetic rubber such as styrene-butadiene rubber, acrylonitvile-butadiene rubber, isoprene- isobutylene rubber, isobutylene polymer, polybutadiene, polyisoprene, polychloro-prone, ethylone-propylene rubber, and the like or natural rubber; a foam of said rubber; a fiber material such as a non-woven fabric, fabric or knitting, paper, corrugated cardboard, and the like or impregnated material consisting of said fiber material into which said thermoplastic resin, said thermosetting resin, or said rubber is impregnated; a wood material such as wood, plywood, hardboard, and the like or impregnated material consisting of said wood material into which said thermoplastic resin, said thermosetting resin, or said rubber is impregnated; a metal; a composite material combining two or more kinds of said materials are used. In said materials, an inorganic or organic filler such as wood powder, fiber powder, walnut powder, coconut powder, flour, chatt powder, calcium carbonate, talc, silica, clay, bentonite, stone powder, blast furnace slag, flyash, and the like may be mixed. When said inorganic filler is mixed in said thermoplastic resin or said foam of said thermoplastic resin, the heat resistance of said thermoplastic resin or said foam of said thermoplastic resin may be improved and in the drying process or the curing process after the coating, when heat is effected on said masking member, said masking member may not deform or degrade and further the masking member in which said inorganic filler is mixed has an improved mechanical strength and may not be broken when said masking member is attached or removed so that said masking member may be repeatedly used. Further, said masking member in which said inorganic filler is mixed has a small calorific value when scraps of said member are treated by burning so that the damage to an incinerator may be reduced. Said inorganic filler may be added to said thermoplastic resin or said foam of said thermoplastic resin in the amount of 10 to 500 parts by weight, preferably 20 to 400 parts by weight for 100 parts by weight of said thermoplastic resin or said foam of said thermoplastic resin. Further, dyestuff, pigment, antioxidant, ultraviolet absorber, plasticizer, and the like may be mixed in said sheet. Further, to manufacture said masking member of the present invention, a well-known method such as vacuum forming, press molding, casting, extrusion, injection molding, paper making, and the like may be employed.
