JP7833163B2 - Masking jig and surface treatment method using the same - Google Patents
Masking jig and surface treatment method using the sameInfo
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- JP7833163B2 JP7833163B2 JP2021203134A JP2021203134A JP7833163B2 JP 7833163 B2 JP7833163 B2 JP 7833163B2 JP 2021203134 A JP2021203134 A JP 2021203134A JP 2021203134 A JP2021203134 A JP 2021203134A JP 7833163 B2 JP7833163 B2 JP 7833163B2
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Description
本発明は、例えば各種工業製品の部品に、メッキ加工、アルマイト処理等の表面処理を施す際に用いられるマスキング治具及びこれを用いた表面処理方法に関するものである。 This invention relates to a masking jig used when applying surface treatments such as plating and anodizing to parts of various industrial products, and to a surface treatment method using the same.
一般に、各種工業製品の部品に表面処理を施す際には、表面処理を施さない部分をマスキングした状態で表面処理を行うようにしている。例えば、スクロール型コンプレッサの一部品である可動スクロールは、その一端面の中央に円筒状の軸受部が突設され、軸受部以外の部分、或いは軸受部を含む所定範囲以外の部分に表面処理を施すようにしている。その際、専用のマスキング治具を部品に装着し、表面処理を施さない部分をマスキング治具によってマスキングするようにしたものが知られている（例えば、特許文献１参照）。 Generally, when applying surface treatment to parts of various industrial products, the areas that are not to be treated are masked before the surface treatment is performed. For example, a movable scroll, a component of a scroll-type compressor, has a cylindrical bearing protruding from the center of one end face. Surface treatment is applied to the parts other than the bearing, or to the parts outside a predetermined range including the bearing. In this case, a dedicated masking jig is attached to the part, and the areas that are not to be treated are masked by the masking jig (see, for example, Patent Document 1).
このマスキング治具は、前記軸受部の外周面を覆う筒状のシール部と、軸受部の一端を覆う底面部とを有する弾性変形可能な部材からなり、軸受部に装着した後、底面部で密閉された軸受部の内部空間を負圧にすることにより、治具本体が部品から容易に外れないようにしている。この場合、マスキング治具の底面部を外部から押圧して軸受部の内部空間の空気を押し出すことにより、軸受部の内部空間を負圧にするようにしている。 This masking jig consists of an elastically deformable member having a cylindrical sealing portion that covers the outer circumferential surface of the bearing portion and a bottom portion that covers one end of the bearing portion. After being attached to the bearing portion, the internal space of the bearing portion, sealed by the bottom portion, is made negatively pressurized, preventing the jig body from easily detaching from the component. In this case, the bottom portion of the masking jig is pressed from the outside to push out the air from the internal space of the bearing portion, thereby creating negative pressure inside the bearing portion.
しかしながら、前記従来例のマスキング治具では、マスキング治具の底面部を押圧して内部空気を押し出す作業が必要となり、作業工数が多くなるとともに、この作業を作業者が怠ると、部品に装着したマスキング治具が脱落するという問題点があった。また、表面処理対象物との間の空間を負圧にすると、表面処理用の液体中で軸受部内に液体が吸入されるおそれもあった。 However, the conventional masking jig described above required pressing the bottom surface of the jig to expel internal air, which increased the number of work steps. Furthermore, if the worker neglected this step, the masking jig attached to the part would detach. Additionally, creating negative pressure in the space between the jig and the object to be surface-treated posed a risk of the surface treatment liquid being drawn into the bearing section.
本発明は前記問題点に鑑みてなされたものであり、その目的とするところは、表面処理対象物との間の空間を負圧にする必要がなく、表面処理対象物に確実に装着することのできるマスキング治具及びこれを用いた表面処理方法を提供することにある。 This invention has been made in view of the aforementioned problems, and its objective is to provide a masking jig that can be reliably attached to a surface-treated object without requiring a negative pressure in the space between the jig and the object to be surface-treated, and a surface treatment method using the same.
本発明は前記目的を達成するために、一端を開口した筒状部が突設された表面処理対象物に装着され、表面処理対象物の少なくとも筒状部の表面を覆うように形成された治具本体によって表面処理対象物をマスキングするマスキング治具において、前記治具本体に、外周面が筒状部の内周面に嵌合する第１の嵌合部と、内周面が筒状部の外周面に嵌合する第２の嵌合部とを設けている。 To achieve the above objective, the present invention provides a masking jig for surface treatment, which is attached to a surface treatment object having a cylindrical portion protruding from one end and is formed to cover at least the surface of the cylindrical portion of the surface treatment object. The jig body is provided with a first fitting portion whose outer surface fits into the inner surface of the cylindrical portion, and a second fitting portion whose inner surface fits into the outer surface of the cylindrical portion.
これにより、治具本体を表面処理対象物に装着すると、第１の嵌合部の外周面が筒状部の内周面に嵌合するとともに、第２の嵌合部の内周面が筒状部の外周面に嵌合することから、第１の嵌合部及び第２の嵌合部が筒状部を挟み込むように嵌合する。 As a result, when the jig body is attached to the object to be surface treated, the outer circumferential surface of the first fitting portion fits into the inner circumferential surface of the cylindrical portion, and the inner circumferential surface of the second fitting portion fits into the outer circumferential surface of the cylindrical portion. Therefore, the first and second fitting portions fit together, sandwiching the cylindrical portion.
本発明によれば、第１の嵌合部及び第２の嵌合部によって筒状部を挟み込むように嵌合することができるので、治具本体を表面処理対象物に確実に保持することができる。これにより、従来のように表面処理対象物との間の空間を負圧にする必要がなく、振動や衝撃が加わった場合でも表面処理対象物からの脱落を効果的に防止することができる。 According to the present invention, the cylindrical portion can be fitted by sandwiching it between the first and second fitting portions, thus securely holding the jig body to the object to be surface treated. This eliminates the need to create negative pressure in the space between the jig and the object to be treated, as in conventional methods, and effectively prevents the jig from falling off the object even when subjected to vibration or impact.
図１乃至図６は本発明の一実施形態を示すもので、例えばスクロール型コンプレッサの一部品である可動スクロールの表面処理工程に用いられるマスキング治具を示すものである。 Figures 1 to 6 illustrate one embodiment of the present invention, specifically showing a masking jig used in the surface treatment process of a movable scroll, which is a component of a scroll-type compressor.
同図に示す表面処理対象物としての可動スクロール１は、円板状の本体部２の一端面に円筒状の軸受部３が突設されるとともに、軸受部３の内周面には円筒状のブッシュ３ａが取り付けられ、軸受部３及びブッシュ３ａは筒状部をなす。軸受部３の内部は本体部２の一端面よりも深く形成され、ブッシュ３ａの軸方向一端と軸受部３の底面との間の隙間には環状凹部からなる係合部３ｂが形成されている。本体部２の他端面には径方向に偏心したスクロール部４が突設され、図示していないがスクロール部４の内側は渦巻き状に形成されている。 The movable scroll 1, shown in the figure as the object to be surface-treated, has a cylindrical bearing portion 3 protruding from one end face of a disc-shaped main body 2. A cylindrical bush 3a is attached to the inner circumferential surface of the bearing portion 3, and the bearing portion 3 and bush 3a form a cylindrical portion. The interior of the bearing portion 3 is formed deeper than the end face of the main body 2, and an engagement portion 3b, consisting of an annular recess, is formed in the gap between one axial end of the bush 3a and the bottom surface of the bearing portion 3. A radially eccentric scroll portion 4 protrudes from the other end face of the main body 2, and although not shown, the inside of the scroll portion 4 is formed in a spiral shape.
本実施形態のマスキング治具１０は、可動スクロール１の一端面側を覆うように形成された治具本体１１を備え、治具本体１１は可動スクロール１に着脱自在に装着されるようになっている。 The masking jig 10 of this embodiment includes a jig body 11 formed to cover one end face of the movable scroll 1, and the jig body 11 is detachably attached to the movable scroll 1.
治具本体１１は、ゴム等の弾性変形可能な部材からなり、可動スクロール１の軸受部３の内周面に嵌合する第１の嵌合部１２と、可動スクロール１の軸受部３の外周面に嵌合する第２の嵌合部１３と、可動スクロール１の本体部２の外周面に嵌合する第３の嵌合部１４と、手指で把持可能な把持部１５とを備え、第３の嵌合部１４はリング状部材としての弾性リング１６によって可動スクロール１の本体部２の外周面に圧着するようになっている。 The jig body 11 is made of an elastically deformable material such as rubber and includes a first fitting portion 12 that fits onto the inner circumferential surface of the bearing portion 3 of the movable scroll 1, a second fitting portion 13 that fits onto the outer circumferential surface of the bearing portion 3 of the movable scroll 1, a third fitting portion 14 that fits onto the outer circumferential surface of the main body portion 2 of the movable scroll 1, and a gripping portion 15 that can be grasped with the fingers. The third fitting portion 14 is pressed against the outer circumferential surface of the main body portion 2 of the movable scroll 1 by an elastic ring 16, which is a ring-shaped member.
治具本体１１は円板状に形成され、その一端面の径方向中央側には軸方向一方（可動スクロール１への装着面の反対側）に偏在するように突出する突出部１１ａが治具本体１１と同心円状に形成されている。また、治具本体１１の他端面（可動スクロール１への装着面）には治具本体１１と同心円状をなす凹部１１ｂが設けられ、凹部１１ｂは外径が突出部１１ａの外径よりも大きく形成されている。 The jig body 11 is formed in a disc shape, and a projection 11a is formed concentrically with the jig body 11 on the radial center side of one end face, so as to be off-center in the axial direction (opposite the mounting surface to the movable scroll 1). Furthermore, a recess 11b is provided on the other end face of the jig body 11 (the mounting surface to the movable scroll 1), concentric with the jig body 11, and the outer diameter of the recess 11b is larger than the outer diameter of the projection 11a.
第１の嵌合部１２は、治具本体１１の他端面中央側から突出部１１ａの反対側に向かって治具本体１１と同心円状に突出するように設けられ、外径寸法が可動スクロール１の軸受部３のブッシュ３ａの内径寸法と等しく、長さ寸法が軸受部３の内周側の深さ寸法よりも若干短い円柱状に形成されている。第１の嵌合部１２の先端側の端縁には径方向外側に向かって突出する環状凸部からなる係合部１２ａが形成され、係合部１２ａは可動スクロール１の係合部３ｂに係合するようになっている。また、第１の嵌合部１２の先端面中央側には治具本体１１と同心円状をなす凹部１２ｂが設けられている。 The first fitting portion 12 is provided so as to protrude concentrically from the center of the other end face of the jig body 11 toward the opposite side of the projection 11a. It is formed in a cylindrical shape with an outer diameter equal to the inner diameter of the bush 3a of the bearing portion 3 of the movable scroll 1, and a length slightly shorter than the inner circumference depth of the bearing portion 3. An engaging portion 12a, consisting of an annular projection projecting radially outward, is formed at the tip edge of the first fitting portion 12, and the engaging portion 12a engages with the engaging portion 3b of the movable scroll 1. Furthermore, a recess 12b, concentric with the jig body 11, is provided at the center of the tip face of the first fitting portion 12.
第２の嵌合部１３は、治具本体１１の他端面側から突出部１１ａの反対側に向かって治具本体１１と同心円状に突出するように設けられ、第１の嵌合部１２と径方向に間隔をおいて円筒状に形成されている。この場合、第２の嵌合部１３は、内径寸法が可動スクロール１の軸受部３の外径寸法と等しく、長さ寸法が軸受部３の外周側の高さ寸法と等しくなるように形成されている。第２の嵌合部１３の先端側の端縁には径方向内側に向かって突出する環状凸部からなる圧接部１３ａが形成され、圧接部１３ａは軸受部３の外周面に圧接するようになっている。 The second fitting portion 13 is provided so as to protrude concentrically from the other end face of the jig body 11 toward the opposite side of the protrusion 11a, and is formed in a cylindrical shape with a radial gap between it and the first fitting portion 12. In this case, the second fitting portion 13 is formed such that its inner diameter is equal to the outer diameter of the bearing portion 3 of the movable scroll 1, and its length is equal to the height of the outer circumference of the bearing portion 3. A pressure contact portion 13a, consisting of an annular projection that protrudes radially inward, is formed at the tip edge of the second fitting portion 13, and the pressure contact portion 13a is designed to press against the outer circumference of the bearing portion 3.
第３の嵌合部１４は、治具本体１１の周縁側から突出部１１ａの反対側に向かって治具本体１１と同心円状に突出するように設けられ、内径寸法が可動スクロール１の本体部２の外径寸法と等しく、長さ寸法が本体部２の外周側の高さ寸法よりも若干短い円筒状に形成されている。また、第３の嵌合部１４の外周面には弾性リング１６が係合する環状の溝部１４ａが設けられ、溝部１４ａは断面略半円状に形成されている。 The third fitting portion 14 is provided so as to protrude concentrically from the peripheral edge of the jig body 11 toward the opposite side of the protruding portion 11a. It is formed in a cylindrical shape with an inner diameter equal to the outer diameter of the main body portion 2 of the movable scroll 1, and a length slightly shorter than the height of the outer circumference of the main body portion 2. Furthermore, an annular groove 14a is provided on the outer circumferential surface of the third fitting portion 14, into which the elastic ring 16 engages. The groove 14a is formed in a substantially semicircular cross-section.
把持部１５は、突出部１１ａから軸方向一方に向かって突出するように設けられ、突出部１１ａの一端面に垂直な二平面を有する板状に形成されている。また、把持部１５には厚さ方向両面に貫通する貫通孔１５ａが設けられ、貫通孔１５ａは吊り下げ用のフック（図示せず）を挿通するようになっている。 The gripping portion 15 is provided so as to protrude from the projection portion 11a in one axial direction, and is formed in a plate shape having two planes perpendicular to one end face of the projection portion 11a. Furthermore, the gripping portion 15 is provided with through holes 15a that penetrate both sides in the thickness direction, and these through holes 15a are designed for inserting a suspension hook (not shown).
弾性リング１６は、ゴム製のＯリングからなり、第３の嵌合部１４の溝部１４ａに装着した状態で第３の嵌合部１４を可動スクロール１の本体部２の外周面に圧着させるようになっている。 The elastic ring 16 is made of a rubber O-ring and is fitted into the groove 14a of the third fitting portion 14, thereby pressing the third fitting portion 14 against the outer circumferential surface of the main body portion 2 of the movable scroll 1.
以上のように構成されたマスキング治具１０は、図５に示すように治具本体１１の軸方向他端面側を可動スクロール１の本体部２の一端面に対向させ、把持部１５を手指で把持しながら治具本体１１を可動スクロール１の本体部２の一端面に押し当てることにより、図６に示すように可動スクロール１に装着する。 As described above, the masking jig 10 is attached to the movable scroll 1 by aligning the other axial end face of the jig body 11 with one end face of the main body 2 of the movable scroll 1, as shown in Figure 5, and pressing the jig body 11 against one end face of the main body 2 of the movable scroll 1 while gripping the gripping part 15 with your fingers, as shown in Figure 6.
その際、治具本体１１の第１の嵌合部１２が軸受部３内に挿入されるとともに、第１の嵌合部１２の係合部１２ａがブッシュ３ａの軸方向一端と軸受部３の底面との間の係合部３ｂに係合し、第１の嵌合部１２がブッシュ３ａの内周面に嵌合する。この場合、第１の嵌合部１２が径方向に内側に向かって弾性変形しながら係合部１２ａがブッシュ３ａを乗り越えて係合部３ｂに係合するが、第１の嵌合部１２の中央側には凹部１２ｂが設けられているので、第１の嵌合部１２が径方向に弾性変形しやすくなる。 In this process, the first fitting portion 12 of the jig body 11 is inserted into the bearing portion 3, and the engaging portion 12a of the first fitting portion 12 engages with the engaging portion 3b between one axial end of the bush 3a and the bottom surface of the bearing portion 3, causing the first fitting portion 12 to fit onto the inner circumferential surface of the bush 3a. In this case, the engaging portion 12a overcomes the bush 3a and engages with the engaging portion 3b while the first fitting portion 12 elastically deforms radially inward. Since a recess 12b is provided on the central side of the first fitting portion 12, the first fitting portion 12 becomes more susceptible to radial elastic deformation.
また、前記装着の際、軸受部３が第２の嵌合部１３内に挿入されるとともに、第２の嵌合部１３の圧接部１３ａが軸受部３の外周面に弾性変形して圧接することにより、第２の嵌合部１３が軸受部３の外周面に嵌合する。 Furthermore, during installation, the bearing portion 3 is inserted into the second fitting portion 13, and the pressure contact portion 13a of the second fitting portion 13 elastically deforms and presses against the outer circumferential surface of the bearing portion 3, thereby fitting the second fitting portion 13 into the outer circumferential surface of the bearing portion 3.
更に、可動スクロール１の本体部２が第３の嵌合部１４内に挿入されることにより、第３の嵌合部１４が可動スクロール１の本体部２の外周面に嵌合する。その際、治具本体１１と可動スクロール１の一端面との間には凹部１１ｂによる空間が形成される。この状態で、第３の嵌合部１４に弾性リング１６を装着することにより、第３の嵌合部１４が可動スクロール１の本体部２の外周面に圧着し、治具本体１１と可動スクロール１との間が密閉される。 Furthermore, when the main body 2 of the movable scroll 1 is inserted into the third fitting portion 14, the third fitting portion 14 fits onto the outer circumferential surface of the main body 2 of the movable scroll 1. At this time, a space is formed between the jig body 11 and one end face of the movable scroll 1 by the recess 11b. In this state, by attaching the elastic ring 16 to the third fitting portion 14, the third fitting portion 14 is pressed against the outer circumferential surface of the main body 2 of the movable scroll 1, sealing the space between the jig body 11 and the movable scroll 1.
前述のようにして可動スクロール１にマスキング治具１０を装着した後、マスキング治具１０の把持部１５の貫通孔１５ａに吊り下げ用のフック（図示せず）を挿通し、表面処理用の液体中に浸漬することにより、マスキング治具１０でマスキングされた可動スクロール１に表面処理（例えばメッキ）が施される。その際、振動や衝撃が加わった場合でも、第１の嵌合部１２及び第２の嵌合部１３が可動スクロール１の軸受部３及びブッシュ３ａを挟み込むように嵌合しているので、従来のように軸受部の内部空間を負圧にせずとも治具本体１１が可動スクロール１に確実に保持される。 After attaching the masking jig 10 to the movable scroll 1 as described above, a suspension hook (not shown) is inserted through the through hole 15a of the gripping portion 15 of the masking jig 10, and the jig is immersed in a surface treatment liquid. This allows the movable scroll 1, masked by the masking jig 10, to undergo surface treatment (e.g., plating). During this process, even if vibration or shock is applied, the first fitting portion 12 and the second fitting portion 13 are fitted together to sandwich the bearing portion 3 and bush 3a of the movable scroll 1. Therefore, the jig body 11 is securely held to the movable scroll 1 without creating negative pressure in the internal space of the bearing portion, as in conventional methods.
このように、本実施形態のマスキング治具１０は、可動スクロール１の軸受部３及びブッシュ３ａの内周面に嵌合する第１の嵌合部１２と、可動スクロール１の軸受部３の外周面に嵌合する第２の嵌合部１３とを備えているので、第１の嵌合部１２及び第２の嵌合部１３によって可動スクロール１の軸受部３及びブッシュ３ａを挟み込むように嵌合することができ、治具本体１１を可動スクロール１に確実に保持することができる。これにより、従来のように表面処理対象物との間の空間を負圧にする必要がなく、振動や衝撃が加わった場合でもマスキング治具１０の可動スクロール１からの脱落を効果的に防止することができる。 As described above, the masking jig 10 of this embodiment includes a first fitting portion 12 that fits onto the inner circumferential surface of the bearing portion 3 and bush 3a of the movable scroll 1, and a second fitting portion 13 that fits onto the outer circumferential surface of the bearing portion 3 of the movable scroll 1. Therefore, the first fitting portion 12 and the second fitting portion 13 can be used to sandwich and fit the bearing portion 3 and bush 3a of the movable scroll 1, ensuring that the jig body 11 is securely held on the movable scroll 1. This eliminates the need to create negative pressure in the space between the jig and the object to be surface treated, as in conventional methods, and effectively prevents the masking jig 10 from falling off the movable scroll 1 even when vibration or shock is applied.
また、治具本体１１の第３の嵌合部１４に着脱可能な弾性リング１６によって第３の嵌合部１４を可動スクロール１の本体部２の外周面に圧着させるようにしたので、治具本体１１と可動スクロール１との間を確実に密閉することができ、表面処理用の液体の侵入を確実に防止することができる。 Furthermore, since the third fitting portion 14 of the jig body 11 is pressed against the outer circumferential surface of the main body 2 of the movable scroll 1 by a detachable elastic ring 16, the space between the jig body 11 and the movable scroll 1 can be reliably sealed, and the intrusion of surface treatment liquid can be reliably prevented.
更に、治具本体１１に手指で把持可能な把持部１５を設けたので、把持部１５を把持しながら第１及び第２の嵌合部１２，１３を軸受部３及びブッシュ３ａに嵌合することができ、マスキング治具１０の装着を容易且つ確実に行うことができる。 Furthermore, since the jig body 11 is provided with a gripping portion 15 that can be grasped with the fingers, the first and second fitting portions 12 and 13 can be fitted into the bearing portion 3 and bush 3a while gripping the gripping portion 15, allowing for easy and reliable installation of the masking jig 10.
図７乃至図１７は本発明の他の実施形態を示すもので、前記実施形態と同等の構成部分には同一の符号を付して示す。 Figures 7 to 17 illustrate other embodiments of the present invention, and components equivalent to those in the above embodiments are denoted by the same reference numerals.
本実施形態のマスキング治具２０は、可動スクロール１の軸受部３を覆うように形成された治具本体２１と、治具本体２１に圧入される圧入部材３０とを備え、治具本体２１は可動スクロール１に着脱自在に装着されるようになっている。 The masking jig 20 of this embodiment comprises a jig body 21 formed to cover the bearing portion 3 of the movable scroll 1, and a press-fitting member 30 that is press-fitted into the jig body 21. The jig body 21 is detachably attached to the movable scroll 1.
治具本体２１は、ゴム等の弾性変形可能な部材からなり、可動スクロール１の軸受部３の内周面に嵌合する第１の嵌合部２２と、可動スクロール１の軸受部３の外周面に嵌合する第２の嵌合部２３と、圧入部材３０が圧入される凹部２４とを備え、第２の嵌合部２３はリング状部材としての弾性リング２５によって可動スクロール１の本体部２の外周面に圧着するようになっている。 The jig body 21 is made of an elastically deformable material such as rubber and includes a first fitting portion 22 that fits onto the inner circumferential surface of the bearing portion 3 of the movable scroll 1, a second fitting portion 23 that fits onto the outer circumferential surface of the bearing portion 3 of the movable scroll 1, and a recess 24 into which the press-fitting member 30 is press-fitted. The second fitting portion 23 is pressed against the outer circumferential surface of the main body portion 2 of the movable scroll 1 by an elastic ring 25, which is a ring-shaped member.
治具本体２１は円板状に形成され、その一端面（可動スクロール１への装着面の反対側の面）は平坦面をなすように形成されている。 The jig body 21 is formed in a disc shape, and one end face (the face opposite the mounting surface to the movable scroll 1) is formed to be a flat surface.
第１の嵌合部２２は、治具本体２１の他端面（可動スクロール１への装着面）の中央側から治具本体２１と同心円状に突出するように設けられ、外径寸法が可動スクロール１の軸受部３のブッシュ３ａの内径寸法と等しく、長さ寸法が軸受部３の内周側の深さ寸法と等しい円柱状に形成されている。第１の嵌合部２２の先端側の端縁には径方向外側に向かって突出する環状凸部からなる係合部２２ａが形成され、係合部２２ａは可動スクロール１の係合部３ｂに係合するようになっている。 The first fitting portion 22 is provided so as to protrude concentrically from the center of the other end face (the mounting surface to the movable scroll 1) of the jig body 21. It is formed in a cylindrical shape, with an outer diameter equal to the inner diameter of the bush 3a of the bearing portion 3 of the movable scroll 1, and a length equal to the inner circumference depth of the bearing portion 3. An engaging portion 22a, consisting of an annular projection projecting radially outward, is formed at the tip edge of the first fitting portion 22, and the engaging portion 22a engages with the engaging portion 3b of the movable scroll 1.
第２の嵌合部２３は、治具本体２１の周縁側から第１の嵌合部２２と同一方向に治具本体２１と同心円状に突出するように設けられ、第１の嵌合部２２と径方向に間隔をおいて円筒状に形成されている。この場合、第２の嵌合部２３は、内径寸法が可動スクロール１の軸受部３の外径寸法と等しく、長さ寸法が軸受部３の外周側の高さ寸法よりも若干短くなるように形成されている。第２の嵌合部２３の先端側の端縁には径方向内側に向かって突出する環状凸部からなる圧接部２３ａが形成され、圧接部２３ａは軸受部３の外周面に圧接するようになっている。また、第２の嵌合部２３の外周面には弾性リング２５が係合する環状の溝部２３ｂが設けられ、溝部２３ｂは断面略半円状に形成されている。 The second fitting portion 23 is provided so as to protrude concentrically from the peripheral edge of the jig body 21 in the same direction as the first fitting portion 22, and is formed in a cylindrical shape with a radial gap between it and the first fitting portion 22. In this case, the second fitting portion 23 is formed such that its inner diameter is equal to the outer diameter of the bearing portion 3 of the movable scroll 1, and its length is slightly shorter than the height of the outer circumference of the bearing portion 3. A pressure contact portion 23a, consisting of an annular projection that protrudes radially inward, is formed at the tip edge of the second fitting portion 23, and the pressure contact portion 23a is designed to press against the outer circumferential surface of the bearing portion 3. Furthermore, an annular groove portion 23b into which the elastic ring 25 engages is provided on the outer circumferential surface of the second fitting portion 23, and the groove portion 23b is formed in a substantially semicircular cross-section.
凹部２４は、治具本体２１と同心円状に形成され、一端が治具本体２１の一端面に開口するように第１の嵌合部２２に設けられている。これにより、第１の嵌合部２２は、内側に凹部２４を有する有底筒状をなす。 The recess 24 is formed concentrically with the jig body 21 and is provided on the first fitting portion 22 such that one end opens to one end face of the jig body 21. As a result, the first fitting portion 22 has a bottomed cylindrical shape with the recess 24 on its inner side.
弾性リング２５は、ゴム製のＯリングからなり、第２の嵌合部２３の溝部２３ｂに装着した状態で第２の嵌合部２３を可動スクロール１の本体部２の外周面に圧着させるようになっている。 The elastic ring 25 is made of a rubber O-ring and, when fitted into the groove 23b of the second fitting portion 23, is designed to press the second fitting portion 23 against the outer circumferential surface of the main body portion 2 of the movable scroll 1.
圧入部材３０は、円板状の本体部３１と、手指で把持可能な把持部３２と、治具本体２１の凹部２４に圧入される凸部３３とからなり、本体部３１は外径寸法が治具本体２１の外径寸法よりも小さく、凹部２４の内径寸法よりも大きくなるように形成されている。 The press-fit member 30 consists of a disc-shaped main body 31, a gripping portion 32 that can be grasped by the fingers, and a protrusion 33 that is press-fitted into the recess 24 of the jig body 21. The main body 31 is formed so that its outer diameter is smaller than the outer diameter of the jig body 21 and larger than the inner diameter of the recess 24.
把持部３２は、本体部３１から軸方向一方に向かって突出するように設けられ、本体部３１の一端面に垂直な二平面を有する板状に形成されている。把持部３２には厚さ方向両面に貫通する貫通孔３２ａが設けられ、貫通孔３２ａは吊り下げ用のフック（図示せず）を挿通するようになっている。 The gripping portion 32 is provided so as to protrude from the main body portion 31 in one axial direction and is formed in a plate shape having two planes perpendicular to one end face of the main body portion 31. The gripping portion 32 is provided with through holes 32a that penetrate both sides in the thickness direction, and these through holes 32a are designed for inserting a suspension hook (not shown).
凸部３３は、本体部３１から軸方向他方に向かって突出するように設けられ、外径寸法が凹部２４の内径寸法よりも僅かに大きく、長さ寸法が凹部２４の内周側の深さ寸法と等しくなるように形成されている。 The protrusion 33 is provided so as to project from the main body 31 in the other axial direction, and is formed such that its outer diameter is slightly larger than the inner diameter of the recess 24, and its length is equal to the depth of the inner circumference of the recess 24.
以上のように構成されたマスキング治具２０は、図１５に示すように治具本体２１の軸方向他端面側を可動スクロール１の軸受部３に対向させ、図１６に示すように治具本体２１を可動スクロール１に装着する。 As shown in Figure 15, the masking jig 20 is configured such that the other axial end face of the jig body 21 faces the bearing portion 3 of the movable scroll 1, and the jig body 21 is mounted on the movable scroll 1 as shown in Figure 16.
その際、治具本体２１の第１の嵌合部２２が軸受部３内に挿入されるとともに、第１の嵌合部２２の係合部２２ａがブッシュ３ａの軸方向一端と軸受部３の底面との間の係合部３ｂに係合し、第１の嵌合部２２がブッシュ３ａの内周面に嵌合する。この場合、第１の嵌合部２２が径方向に内側に向かって弾性変形しながら係合部２２ａがブッシュ３ａを乗り越えて係合部３ｂに係合するが、第１の嵌合部２２には凹部２４が設けられているので、第１の嵌合部２２が径方向に弾性変形しやすくなる。 In this process, the first fitting portion 22 of the jig body 21 is inserted into the bearing portion 3, and the engaging portion 22a of the first fitting portion 22 engages with the engaging portion 3b between one axial end of the bush 3a and the bottom surface of the bearing portion 3, causing the first fitting portion 22 to fit onto the inner circumferential surface of the bush 3a. In this case, the engaging portion 22a overcomes the bush 3a and engages with the engaging portion 3b while the first fitting portion 22 elastically deforms radially inward. Since the first fitting portion 22 is provided with a recess 24, the first fitting portion 22 is more easily elastically deformed radially.
また、前記装着の際、軸受部３が第２の嵌合部２３内に挿入されるとともに、第２の嵌合部２３の圧接部２３ａが軸受部３の外周面に弾性変形して圧接することにより、第２の嵌合部２３が軸受部３の外周面に嵌合する。この状態で、第２の嵌合部２３に弾性リング２５を装着することにより、第２の嵌合部２３が可動スクロール１の軸受部３の外周面に圧着し、治具本体２１と可動スクロール１との間が密閉される。 Furthermore, during installation, the bearing portion 3 is inserted into the second fitting portion 23, and the pressure contact portion 23a of the second fitting portion 23 elastically deforms and presses against the outer circumferential surface of the bearing portion 3, thereby fitting the second fitting portion 23 to the outer circumferential surface of the bearing portion 3. In this state, by attaching the elastic ring 25 to the second fitting portion 23, the second fitting portion 23 is pressed against the outer circumferential surface of the bearing portion 3 of the movable scroll 1, sealing the space between the jig body 21 and the movable scroll 1.
治具本体２１を可動スクロール１に装着した後、図１６に示すように治具本体２１に圧入部材３０を装着する。その際、圧入部材３０は、把持部１５を手指で把持しながら凸部３３を治具本体２１の凹部２４に圧入することにより、図１７に示すように治具本体２１に保持される。また、圧入部材３０の圧入により、凹部２４の内周面が圧入部材３０の凸部３３によって径方向に押圧され、第２の嵌合部２３が軸受部３及びブッシュ３ａの内周面に圧接する。 After attaching the jig body 21 to the movable scroll 1, the press-fit member 30 is attached to the jig body 21 as shown in Figure 16. At this time, the press-fit member 30 is held in place by the jig body 21 as shown in Figure 17, by pressing the protrusion 33 into the recess 24 of the jig body 21 while gripping the gripping portion 15 with the fingers. Furthermore, the press-fitting of the press-fit member 30 causes the inner circumferential surface of the recess 24 to be pressed radially by the protrusion 33 of the press-fit member 30, causing the second fitting portion 23 to press against the inner circumferential surfaces of the bearing portion 3 and the bush 3a.
前述のようにして可動スクロール１にマスキング治具２０を装着した後、マスキング治具２０の圧入部材３０の貫通孔３２ａに吊り下げ用のフック（図示せず）を挿通し、表面処理用の液体中に浸漬することにより、マスキング治具２０でマスキングされた可動スクロール１に表面処理（例えばメッキ）が施される。その際、振動や衝撃が加わった場合でも、第１の嵌合部２２及び第２の嵌合部２３が可動スクロール１の軸受部３及びブッシュ３ａを挟み込むように嵌合するとともに、圧入部材３０の圧入によって第２の嵌合部２３の外周面が軸受部３及びブッシュ３ａの内周面に圧接するので、従来のように軸受部の内部空間を負圧にせずとも治具本体２１が可動スクロール１に確実に保持される。 After attaching the masking jig 20 to the movable scroll 1 as described above, a suspension hook (not shown) is inserted through the through hole 32a of the press-fitting member 30 of the masking jig 20, and the jig is immersed in a surface treatment liquid. This allows the movable scroll 1, masked by the masking jig 20, to undergo surface treatment (e.g., plating). During this process, even if vibration or shock is applied, the first fitting portion 22 and the second fitting portion 23 engage to sandwich the bearing portion 3 and bush 3a of the movable scroll 1. Furthermore, the press-fitting of the press-fitting member 30 causes the outer circumferential surface of the second fitting portion 23 to press against the inner circumferential surfaces of the bearing portion 3 and bush 3a. Therefore, the jig body 21 is securely held to the movable scroll 1 without creating negative pressure in the internal space of the bearing portion, as in conventional methods.
このように、本実施形態のマスキング治具２０は、可動スクロール１の軸受部３及びブッシュ３ａの内周面に嵌合する第１の嵌合部２２と、可動スクロール１の軸受部３の外周面に嵌合する第２の嵌合部２３とを備えるとともに、第２の嵌合部２３に設けられた凹部２４に圧入する圧入部材３０を備えているので、第１の嵌合部２２及び第２の嵌合部２３によって可動スクロール１の軸受部３及びブッシュ３ａを挟み込むように嵌合することができるとともに、圧入部材３０の圧入によって第２の嵌合部２３の外周面を軸受部３及びブッシュ３ａの内周面に圧接させることができ、治具本体２１を可動スクロール１に確実に保持することができる。これにより、従来のように表面処理対象物との間の空間を負圧にする必要がなく、振動や衝撃が加わった場合でもマスキング治具２０の可動スクロール１からの脱落を効果的に防止することができる。 As described above, the masking jig 20 of this embodiment includes a first fitting portion 22 that fits onto the inner circumferential surface of the bearing portion 3 and bush 3a of the movable scroll 1, and a second fitting portion 23 that fits onto the outer circumferential surface of the bearing portion 3 of the movable scroll 1. It also includes a press-fitting member 30 that is press-fitted into a recess 24 provided in the second fitting portion 23. Therefore, the first fitting portion 22 and the second fitting portion 23 can be used to sandwich and fit the bearing portion 3 and bush 3a of the movable scroll 1, and the press-fitting of the press-fitting member 30 can press the outer circumferential surface of the second fitting portion 23 against the inner circumferential surface of the bearing portion 3 and bush 3a, thereby securely holding the jig body 21 to the movable scroll 1. As a result, it is not necessary to create negative pressure in the space between the jig and the object to be surface treated, as in the conventional method, and the masking jig 20 can be effectively prevented from falling off the movable scroll 1 even when vibration or shock is applied.
また、治具本体２１の第２の嵌合部２３に着脱可能な弾性リング２５によって第２の嵌合部２３を可動スクロール１の本体部２の外周面に圧着させるようにしたので、治具本体２１と可動スクロール１との間を確実に密閉することができ、表面処理用の液体の侵入を確実に防止することができる。 Furthermore, since the second fitting portion 23 of the jig body 21 is pressed against the outer circumferential surface of the main body 2 of the movable scroll 1 by a detachable elastic ring 25, the space between the jig body 21 and the movable scroll 1 can be reliably sealed, and the intrusion of surface treatment liquid can be reliably prevented.
更に、圧入部材３０に手指で把持可能な把持部３２を設けたので、把持部３２を把持しながら圧入部材３０を治具本体２１に圧入することができ、圧入部材３０の装着を容易且つ確実に行うことができる。 Furthermore, since the press-fitting member 30 is provided with a gripping portion 32 that can be grasped with the fingers, the press-fitting member 30 can be pressed into the jig body 21 while gripping the gripping portion 32, making the installation of the press-fitting member 30 easy and reliable.
尚、前記各実施形態では、可動スクロール１の軸受部３内に形成された環状凹部からなる係合部３ｂにマスキング治具１０，２０に設けた環状凸部からなる係合部１２ａ，２２ａを係合するようにしたものを示したが、このような凹部及び凸部のないものであってもよい。 In the embodiments described above, the engagement portions 12a and 22a, which are annular protrusions provided on the masking jigs 10 and 20, are shown to engage with the engagement portion 3b, which is an annular recess formed within the bearing portion 3 of the movable scroll 1. However, the configuration may also be one without such recesses and protrusions.
更に、前記各実施形態では、リング状部材として弾性リング１６，２５を用いたものを示したが、金属製のリング状部材を用いることも可能である。 Furthermore, while the embodiments described above show the use of elastic rings 16 and 25 as ring-shaped members, it is also possible to use metal ring-shaped members.
また、前記各実施形態では、表面処理対象物として、スクロール型コンプレッサの一部品である可動スクロール１を示したが、一端を開口した筒状部が突設された表面処理対象物であれば、可動スクロール以外にも本発明を適用することができる。 Furthermore, while the above embodiments show a movable scroll 1, a component of a scroll-type compressor, as the object to be surface-treated, the present invention can be applied to any object to be surface-treated that has a cylindrical portion protruding from one end.
１…可動スクロール、３…軸受部、３ａ…ブッシュ、１０…マスキング治具、１１…治具本体、１２…第１の嵌合部、１３…第２の嵌合部、１４…第３の嵌合部、１５…把持部、１６…弾性リング、２０…マスキング治具、２１…治具本体、２２…第１の嵌合部、２３…第２の嵌合部、２４…凹部、２５…弾性リング、３０…圧入部材、３２…把持部。 1…Movable scroll, 3…Bearing section, 3a…Bush, 10…Masking jig, 11…Jig body, 12…First fitting section, 13…Second fitting section, 14…Third fitting section, 15…Gripping section, 16…Elastic ring, 20…Masking jig, 21…Jig body, 22…First fitting section, 23…Second fitting section, 24…Recess, 25…Elastic ring, 30…Press-fit member, 32…Gripping section.
Claims (8)
前記治具本体に、外周面が前記筒状部の内周面に嵌合する第１の嵌合部と、内周面が前記筒状部の外周面に嵌合する第２の嵌合部とを設け、
前記第１の嵌合部の先端側の端縁には径方向外側に向かって突出する弾性変形可能な環状凸部を設けた
ことを特徴とするマスキング治具。 A masking jig is attached to an object to be surface treated, which has a cylindrical portion protruding from one end that is open, and the jig body is formed to cover at least the surface of the cylindrical portion of the object to be surface treated, and the object to be surface treated is masked by the jig body,
The jig body is provided with a first fitting portion whose outer surface fits into the inner surface of the cylindrical portion, and a second fitting portion whose inner surface fits into the outer surface of the cylindrical portion .
A masking jig characterized in that the tip edge of the first fitting portion is provided with an elastically deformable annular projection that protrudes radially outward .
前記治具本体に、外周面が前記筒状部の内周面に嵌合する第１の嵌合部と、内周面が前記筒状部の外周面に嵌合する第２の嵌合部とを設け、
前記第２の嵌合部の先端側の端縁には径方向内側に向かって突出する弾性変形可能な環状凸部を設けた
ことを特徴とするマスキング治具。 A masking jig is attached to an object to be surface treated, which has a cylindrical portion protruding from one end that is open, and the jig body is formed to cover at least the surface of the cylindrical portion of the object to be surface treated, and the object to be surface treated is masked by the jig body,
The jig body is provided with a first fitting portion whose outer surface fits into the inner surface of the cylindrical portion, and a second fitting portion whose inner surface fits into the outer surface of the cylindrical portion.
The tip edge of the second fitting portion is provided with an elastically deformable annular projection that protrudes radially inward.
A masking jig characterized by the following features.
前記治具本体に、外周面が前記筒状部の内周面に嵌合する第１の嵌合部と、内周面が前記筒状部の外周面に嵌合する第２の嵌合部とを設け、The jig body is provided with a first fitting portion whose outer surface fits into the inner surface of the cylindrical portion, and a second fitting portion whose inner surface fits into the outer surface of the cylindrical portion.
前記第１の嵌合部の先端側の端縁には径方向外側に向かって突出する弾性変形可能な環状凸部を設けるとともに、前記第２の嵌合部の先端側の端縁には径方向内側に向かって突出する弾性変形可能な環状凸部を設けたThe tip edge of the first fitting portion is provided with an elastically deformable annular projection that protrudes radially outward, and the tip edge of the second fitting portion is provided with an elastically deformable annular projection that protrudes radially inward.
ことを特徴とするマスキング治具。A masking jig characterized by the following features.
ことを特徴とする請求項１乃至３の何れか一項記載のマスキング治具。 The masking jig according to any one of claims 1 to 3, characterized in that it comprises a ring-shaped member detachably provided on the circumferential surface of the jig body for pressing the jig body against the object to be surface treated.
ことを特徴とする請求項１乃至４の何れか一項記載のマスキング治具。 The masking jig according to any one of claims 1 to 4, characterized in that the jig body has a gripping portion that can be grasped by the fingers, and the first and second fitting portions are fitted into the cylindrical portion while the gripping portion is grasped.
前記第１の嵌合部は、凹部に圧入された前記圧入部材によって前記筒状部の内周面側に押圧されるように形成されている
ことを特徴とする請求項１乃至３の何れか一項記載のマスキング治具。 The first fitting portion is equipped with a press-fitting member that can be press-fitted into the recess provided therein.
The masking jig according to any one of claims 1 to 3, characterized in that the first fitting portion is formed to be pressed against the inner circumferential surface side of the cylindrical portion by the press-fitting member which is press-fitted into the recess.
ことを特徴とする請求項６記載のマスキング治具。 The masking jig according to claim 6 , characterized in that the press-fitting member has a gripping portion that can be grasped by fingers, and is formed to be pressed into the recess while gripping the gripping portion.
ことを特徴とする表面処理方法。 A surface treatment method characterized by performing surface treatment on an object to be surface treated by masking it with a masking jig according to any one of claims 1 to 7 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| JP2000104680A (en) | 1998-09-29 | 2000-04-11 | Sanyo Electric Co Ltd | Method of masking bearing part of oscillating scroll |
| JP2000265279A (en) | 1999-03-15 | 2000-09-26 | Daido Kogyo Kk | Concave hole closing device when plating resin products with concave holes |
| JP2008156689A (en) | 2006-12-22 | 2008-07-10 | Showa Corp | Combined member composed of a member to be processed and a stopper |
| JP2011179098A (en) | 2010-03-03 | 2011-09-15 | Toyota Motor Corp | Masking tool |
| JP5194785B2 (en) | 2007-12-28 | 2013-05-08 | パナソニック株式会社 | Manufacturing method of fluid machine |
| WO2014007090A1 (en) | 2012-07-02 | 2014-01-09 | 新日鐵住金株式会社 | Electroplating device |
| JP2015030867A (en) | 2013-07-31 | 2015-02-16 | 日立オートモティブシステムズ株式会社 | Masking member and method of producing cylinder using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03122654A (en) * | 1989-10-05 | 1991-05-24 | Sharp Corp | Production of substrate for photosensitive body |
| JPH0562569U (en) * | 1992-01-24 | 1993-08-20 | 株式会社ユニシアジェックス | Masking jig |
| JPH0853798A (en) * | 1994-08-10 | 1996-02-27 | Toyota Motor Corp | Cylinder plating masking method and apparatus |
| JPH08127899A (en) * | 1994-10-28 | 1996-05-21 | Showa Alum Corp | Aluminum tube anodizing method |
| JPH11200094A (en) * | 1998-01-07 | 1999-07-27 | Mitsubishi Materials Corp | Auxiliary tool for masking jig |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000104680A (en) | 1998-09-29 | 2000-04-11 | Sanyo Electric Co Ltd | Method of masking bearing part of oscillating scroll |
| JP2000265279A (en) | 1999-03-15 | 2000-09-26 | Daido Kogyo Kk | Concave hole closing device when plating resin products with concave holes |
| JP2008156689A (en) | 2006-12-22 | 2008-07-10 | Showa Corp | Combined member composed of a member to be processed and a stopper |
| JP5194785B2 (en) | 2007-12-28 | 2013-05-08 | パナソニック株式会社 | Manufacturing method of fluid machine |
| JP2011179098A (en) | 2010-03-03 | 2011-09-15 | Toyota Motor Corp | Masking tool |
| WO2014007090A1 (en) | 2012-07-02 | 2014-01-09 | 新日鐵住金株式会社 | Electroplating device |
| JP2015030867A (en) | 2013-07-31 | 2015-02-16 | 日立オートモティブシステムズ株式会社 | Masking member and method of producing cylinder using the same |
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| JP2023088432A (en) | 2023-06-27 |
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