CN108180211B - Suction cup - Google Patents
Suction cup Download PDFInfo
- Publication number
- CN108180211B CN108180211B CN201810026254.9A CN201810026254A CN108180211B CN 108180211 B CN108180211 B CN 108180211B CN 201810026254 A CN201810026254 A CN 201810026254A CN 108180211 B CN108180211 B CN 108180211B
- Authority
- CN
- China
- Prior art keywords
- air
- suction
- sucking disc
- valve
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000007779 soft material Substances 0.000 claims description 3
- 239000002156 adsorbate Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920003225 polyurethane elastomer Polymers 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B47/00—Suction cups for attaching purposes; Equivalent means using adhesives
Abstract
A suction sucker mainly comprises a sucker and a pressure plate, wherein the pressure plate is pressed on the periphery of the sucker, the sucker is a plane capable of being stretched and deformed under the action of external force, an upward protruding air nozzle is arranged on the top of the pressure plate, and the suction sucker further comprises a suction valve, a spring and a connecting plate; the air suction valve comprises a valve core and a valve rod, the valve core is a conical body, and the valve rod is arranged at the center of the conical bottom of the valve core; be equipped with the air cock of outside salient on the pressure disk top, the pressure disk presses the sucking disc on the object surface, and the reuse air pump is taken away the air between pressure disk and the sucking disc through the air cock, makes to form vacuum space between pressure disk and the sucking disc to the pulling sucking disc is warp to the direction of pressure disk, also forms a vacuum space between sucking disc and object surface, thereby makes the sucking disc inhale tightly on the object surface.
Description
Technical Field
The invention relates to a suction cup, belonging to the optimization technology of suction cups.
Background
The vacuum chuck can be easily adsorbed on the surfaces of flat and smooth objects such as glass, ceramic tiles and the like for hanging and grabbing objects. The vacuum chuck can be moved and changed at will, so that the vacuum chuck is very convenient to use. The traditional vacuum chuck is generally made of plastic materials with certain rigidity and certain flexibility, such as silicon rubber or PVC materials, polyurethane or nitrile rubber or vinyl-containing polymers. Most vacuum chuck's structure is the cavity conical body, the sucking disc wall towards adsorbate surface is the upwards sunken toper in middle part, support the sucking disc during use to press the sucking disc middle part to the adsorbate surface, the air that makes the toper intracavity of sucking disc is extruded, then release the sucking disc, the sucking disc produces the negative pressure in the toper intracavity of sucking disc when the process that resets by oneself, make the sucking disc can adsorb the surface at article, perhaps support the sucking disc to extract sucking disc intracavity air again behind the adsorbate surface, make the sucking disc intracavity form the negative pressure. The suction force is generated by the suction disc through self deformation or air suction, when the suction disc is used, the inner wall and the peripheral edge of the suction disc can displace and continuously receive inward pulling force, so that the peripheral edge of the suction disc can move inwards, and the air leakage phenomenon is easy to occur, so that the using function of the suction disc is influenced.
Therefore, a suction cup which is not easy to leak air is needed to be found.
Disclosure of Invention
The purpose of the invention is: provides a suction cup which is not easy to leak air.
The technical scheme of the invention is as follows: a suction cup mainly comprises a suction cup 1 and a pressure plate 2, wherein the pressure plate is pressed on the periphery of the suction cup, the suction cup is a plane which can be stretched and deformed under the action of external force, an air nozzle 21 which protrudes upwards is arranged on the top of the pressure plate, and the suction cup also comprises a suction valve 3, a spring 4 and a connecting plate 5; the air suction valve comprises a valve core and a valve rod, the valve core is a conical body, and the valve rod is arranged at the center of the conical bottom of the valve core; the connecting plate 5 is provided with an air suction through hole 51, the diameter of the valve rod is smaller than the aperture of the air suction through hole, a circle of connecting groove 52 is arranged on the wall surface of the connecting plate facing the pressure plate around the air suction through hole, the inner wall of the connecting groove is provided with an internal thread matched with the external thread on the air tap, a cylindrical connecting body 53 is formed between the connecting groove and the air suction through hole, and the wall surface of the connecting body facing the pressure plate is provided with a cylindrical bracket 54 with a grid hole protruding towards; a connecting hole communicated with the inner hole of the pressure plate is arranged in the air faucet, an inward protruding flange is arranged in the connecting hole, and the wall surface of the flange facing the outlet of the air faucet is matched with a valve core of the air suction valve in a positive-negative mode; inserting the valve rod sleeved with the spring into the support 54, enabling the spring to enter the support, enabling the tail end of the valve rod to enter the air suction through hole, enabling the conical bottom of the valve core to abut against the support, screwing the air tap of the pressure plate into the connecting groove, enabling the valve core to be ejected from the support under the tension of the spring, enabling the valve core to enter the flange and form tight fit with the flange; set up the through-hole of an slope on being located the outer valve rod lateral wall of aspirator nozzle, when will extracting the aspirator valve, inject the through-hole on the valve rod into the one end of a metal pole, the other end supports on the pressure disk top, presses down the metal pole end of surmounting the pressure disk, can extract the aspirator valve from the air cock with less strength.
The wall surface of the sucking disc positioned in the pressure plate is provided with a plurality of circles of folds.
And a plurality of reinforcing ribs protruding towards the direction of the pressing plate are evenly arranged on the wall surface of the sucking disc between the crease and the center of the sucking disc.
The air suction sucker further comprises a sealing ring 6, the sealing ring is made of soft materials and is a hollow circular ring, and the sealing ring is adhered to the edge of the back face of the sucker, back to the air tap.
The wall surface of the sealing ring back to the sucker is provided with more than two rings of deformation rings protruding outwards, and a gap is reserved between every two adjacent deformation rings.
The deformation ring is isosceles trapezoid, and the tail end of the deformation ring, which is far away from the sucker, is a ladder bottom.
Has the advantages that:
1. be equipped with the air cock of outside salient on the pressure disk top, the pressure disk presses the sucking disc on the object surface, and the reuse air pump is taken away the air between pressure disk and the sucking disc through the air cock, makes to form vacuum space between pressure disk and the sucking disc to the pulling sucking disc is warp to the direction of pressure disk, also forms a vacuum space between sucking disc and object surface, thereby makes the sucking disc inhale tightly on the object surface.
Drawings
FIG. 1 is a schematic external view of the present invention;
FIG. 2 is a schematic burst view of the present invention;
FIG. 3 is a perspective view of a web of the present invention;
FIG. 4 is a cut-away view of a web of the present invention;
FIG. 5 is a schematic cross-sectional view of the present invention in an initial state;
FIG. 6 is an enlarged partial view of FIG. 5;
FIG. 7 is a schematic cross-sectional view of the present invention after being adsorbed on a surface of an object.
Detailed Description
As shown in fig. 1 to 7, a suction cup mainly comprises a suction cup 1 and a pressure plate 2, wherein the pressure plate is pressed on the periphery of the suction cup, the suction cup is a plane capable of stretching and deforming under the action of external force, an upward protruding air nozzle 21 is arranged on the top of the pressure plate, an air pump sucks out air in the pressure plate through the air nozzle, negative pressure is generated between the inner wall of the pressure plate and the suction cup, the middle of the suction cup deforms towards the direction of the pressure plate, and a vacuum space is formed between the suction cup and the surface of an object, so that the suction cup is tightly sucked on the surface of the object. Because the inner hole of the pressure plate forms negative pressure, a pulling force towards the direction of the sucker is generated on the pressure plate, so that the sucker can be pressed on the surface of an object by the pressure plate.
The suction sucker also comprises a suction valve 3, a spring 4 and a connecting plate 5; the air suction valve comprises a valve core and a valve rod, the valve core is a conical body, and the valve rod is arranged at the center of the conical bottom of the valve core; the connecting plate 5 is provided with an air suction through hole 51, the diameter of the valve rod is smaller than the aperture of the air suction through hole, a circle of connecting groove 52 is arranged on the wall surface of the connecting plate facing the pressure plate around the air suction through hole, the inner wall of the connecting groove is provided with an internal thread matched with the external thread on the air tap, a cylindrical connecting body 53 is formed between the connecting groove and the air suction through hole, and the wall surface of the connecting body facing the pressure plate is provided with a cylindrical bracket 54 with a grid hole protruding towards; a connecting hole communicated with the inner hole of the pressure plate is arranged in the air faucet, an inward protruding flange is arranged in the connecting hole, and the wall surface of the flange facing the outlet of the air faucet is matched with a valve core of the air suction valve in a positive-negative mode; the valve rod sleeved with the spring is inserted into the support 54, the spring enters the support, the tail end of the valve rod enters the air suction through hole, the conical bottom of the valve core abuts against the support, the air tap of the pressure plate is screwed into the connecting groove, the valve core is ejected from the support under the tension of the spring, and the valve core enters the flange and forms tight fit with the flange.
When the sucker needs to be sucked on the surface of an object, the sucker is tightly pressed on the surface of the object, then the air inlet nozzle of the air pump is inserted into the air suction through hole in the connecting plate, the air pump sucks air outwards during working, the spring is contracted by overcoming the tension of the spring, the valve core moves towards the air inlet nozzle of the air pump, so that the valve core is separated from the flange, a gap is formed between the valve core and the flange, air in the pressure plate sequentially passes through the grids on the support and the gap of the spring from the gap between the valve core and the flange to reach the air suction through hole, then the air is sucked into the air inlet nozzle of the air pump from the gap between the air suction through hole and the valve rod, the more the air is pumped by the air pump, the larger the. After the air inlet nozzle of the air pump is pulled out, the negative pressure space is formed in the pressure plate, so that the valve core is sucked towards the pressure plate, the valve core is abutted against the flange, and air leakage is avoided. When the sucking disc is to be taken down, the connecting plate is screwed down from the air nozzle of the pressure plate, the spring and the air suction valve are exposed, the air suction valve is pulled outwards by hands, the valve core is separated from the flange, external air enters the pressure plate from the air nozzle for supplement, the air pressure inside and outside the pressure plate is balanced, the sucking disc is automatically reset, and therefore the sucking disc can be easily taken away from the surface of an object, and the connecting plate is screwed back to the air nozzle.
Sometimes, the suction valve is difficult to pull out by holding the valve rod because the suction force of the inner hole of the pressure plate is too strong. Set up the through-hole of an slope on being located the outer valve rod lateral wall of suction nozzle, when will extracting the suction valve, inject the through-hole on the valve rod into the one end of a metal pole, the other end supports on the pressure disk top, and the metal pole that surpasss the pressure disk is terminal to the downward pressure, utilizes lever principle, can pull out the suction valve from the air cock with less strength.
The wall surface of the sucking disc positioned in the pressure plate is provided with a plurality of circles of folds. The corrugations provide the chuck with greater deformability as the platen deforms outward. Multiple sets of corrugations may be provided on the platen, as desired. Because the sucking disc is a plane, the sucking disc is sucked to deform towards the inner hole of the pressure plate completely by the negative pressure formed in the pressure plate, and the sucking disc is provided with wrinkles, so that the deformation capacity of the sucking disc is enhanced.
And a plurality of reinforcing ribs protruding towards the direction of the pressing plate are evenly arranged on the wall surface of the sucking disc between the crease and the center of the sucking disc.
The object hanging sucker further comprises a sealing ring 6, the sealing ring is made of soft materials and is a hollow circular ring, and the sealing ring is adhered to the edge of the back face of the sucker, back to the sucker screw, of the sucker through glue. The material that the sealing ring adopted is soft rubber or PP glues, makes the deformability of sealing ring stronger, can fill and level up the surface that has the line or salient point, avoids leaking gas, makes the range of application of sucking disc wider.
The wall surface of the sealing ring back to the sucker is provided with more than two rings of deformation rings protruding outwards, and a gap is reserved between every two adjacent deformation rings.
The deformation ring is isosceles trapezoid, and the tail end of the deformation ring, which is far away from the sucker, is a ladder bottom. The waist of the deformation ring can be made into an arc shape. When the sucking disc pressed the seal ring to the adsorbate surface, the ring that warp can warp to the clearance between the ring that warp to can adapt to the unevenness of adsorbate surface certain degree, make the application scope of sucking disc wider.
The deformation ring is in a sawtooth shape with the tail end inclined outwards the sucker.
The sucking disc is made of materials such as silicon rubber or PVC materials or polyurethane or nitrile rubber or vinyl-containing polymers, and has tensile deformability under the action of external force.
The above-mentioned embodiments are only used for illustrating the application of the present invention, and are not meant to be limiting, and those skilled in the art should make various changes or substitutions within the spirit of the present invention, and shall fall within the protection scope of the present invention.
Claims (6)
1. The utility model provides a suction cup mainly includes sucking disc (1), pressure disk (2), and the pressure disk is pressed at sucking disc periphery edge, its characterized in that: the sucking disc is a plane which can be stretched and deformed under the action of external force, an air nozzle (21) which protrudes upwards is arranged on the top of the pressing disc, and the air sucking disc further comprises an air sucking valve (3), a spring (4) and a connecting plate (5); the air suction valve comprises a valve core and a valve rod, the valve core is a conical body, and the valve rod is arranged at the center of the conical bottom of the valve core; a suction through hole (51) is formed in the connecting plate (5), the diameter of the valve rod is smaller than the aperture of the suction through hole, a circle of connecting groove (52) is formed in the wall surface, facing the pressure plate, of the connecting plate around the suction through hole, an internal thread matched with the external thread on the air tap is arranged on the inner wall of the connecting groove, a cylindrical connecting body (53) is formed between the connecting groove and the suction through hole, and a cylindrical support (54) with a grid hole and protruding towards the pressure plate is arranged on the wall surface, facing the; a connecting hole communicated with the inner hole of the pressure plate is arranged in the air faucet, an inward protruding flange is arranged in the connecting hole, and the wall surface of the flange facing the outlet of the air faucet is matched with a valve core of the air suction valve in a positive-negative mode; inserting the valve rod sleeved with the spring into the support (54), enabling the spring to enter the support, enabling the tail end of the valve rod to enter the air suction through hole, enabling the conical bottom of the valve core to abut against the support, screwing the air tap of the pressure plate into the connecting groove, enabling the valve core to be ejected from the support under the tension of the spring, enabling the valve core to enter the flange and form tight fit with the flange; set up the through-hole of an slope on being located the outer valve rod lateral wall of aspirator nozzle, when will extracting the aspirator valve, inject the through-hole on the valve rod into the one end of a metal pole, the other end supports on the pressure disk top, presses down the metal pole end of surmounting the pressure disk, can extract the aspirator valve from the air cock with less strength.
2. Suction cup according to claim 1, characterized in that: the wall surface of the sucking disc positioned in the pressure plate is provided with a plurality of circles of folds.
3. Suction cup according to claim 2, characterized in that: and a plurality of reinforcing ribs protruding towards the direction of the pressing plate are evenly arranged on the wall surface of the sucking disc between the crease and the center of the sucking disc.
4. Suction cup according to claim 1, characterized in that: the air suction sucker further comprises a sealing ring (6), the sealing ring is made of soft materials and is a hollow circular ring, and the sealing ring is adhered to the edge of the back face of the sucker, back to the air tap.
5. Suction cup according to claim 4, characterized in that: the wall surface of the sealing ring back to the sucker is provided with more than two rings of deformation rings protruding outwards, and a gap is reserved between every two adjacent deformation rings.
6. Suction cup according to claim 5, characterized in that: the deformation ring is isosceles trapezoid, and the tail end of the deformation ring, which is far away from the sucker, is a ladder bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810026254.9A CN108180211B (en) | 2016-11-01 | 2016-11-01 | Suction cup |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610942430.4A CN106438659B (en) | 2016-11-01 | 2016-11-01 | A kind of air-breathing sucker |
| CN201810026254.9A CN108180211B (en) | 2016-11-01 | 2016-11-01 | Suction cup |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610942430.4A Division CN106438659B (en) | 2016-11-01 | 2016-11-01 | A kind of air-breathing sucker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108180211A CN108180211A (en) | 2018-06-19 |
| CN108180211B true CN108180211B (en) | 2020-04-10 |
Family
ID=58178189
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810026254.9A Active CN108180211B (en) | 2016-11-01 | 2016-11-01 | Suction cup |
| CN201610942430.4A Active CN106438659B (en) | 2016-11-01 | 2016-11-01 | A kind of air-breathing sucker |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610942430.4A Active CN106438659B (en) | 2016-11-01 | 2016-11-01 | A kind of air-breathing sucker |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN108180211B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843678B (en) * | 2016-12-08 | 2020-05-05 | 长乐市丽智产品设计有限公司 | Vacuum chuck |
| CN108561410A (en) * | 2017-02-25 | 2018-09-21 | 石狮梵源服饰有限公司 | A kind of pressure-display device and the suction cup suspension member for selecting this pressure-display device |
| CN106763112A (en) * | 2017-02-25 | 2017-05-31 | 中山市元亨家居用品有限公司 | Vacuum lifting appliance |
| CN111592215A (en) * | 2020-05-20 | 2020-08-28 | 临泉县强钢钢化玻璃有限公司 | Glass cutting device |
| US11415266B2 (en) | 2020-12-30 | 2022-08-16 | Israel Harry Zimmerman | Quick-release anchoring apparatus with self-mounted anchor member |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2053203U (en) * | 1989-04-04 | 1990-02-21 | 沈阳重型机器厂 | Vacuum suction cup |
| CN1138553A (en) * | 1995-06-22 | 1996-12-25 | 日本比索株式会社 | Vaccum-suction attachement pad |
| CN201415911Y (en) * | 2009-03-10 | 2010-03-03 | 吕晓光 | Strong vacuum sucking device |
| CN102996611A (en) * | 2012-11-23 | 2013-03-27 | 南京理工大学 | Adsorbing unit with automatic switching behavior and adsorbing device |
| CN104100628A (en) * | 2014-06-22 | 2014-10-15 | 张卫 | Dropping prevention sucking disc pothook |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5685513A (en) * | 1995-05-17 | 1997-11-11 | Nihon Biso Co., Ltd. | Vacuum-suction attachment pad |
| RO116669B1 (en) * | 1996-07-08 | 2001-04-30 | Adrian Munteanu | Device for fastening onto flat surfaces |
| CN2802170Y (en) * | 2005-06-13 | 2006-08-02 | 吴自强 | Suction cup |
| CN201031870Y (en) * | 2007-03-12 | 2008-03-05 | 陈隆志 | Improvement structure of suction disc |
| JP2010180964A (en) * | 2009-02-06 | 2010-08-19 | Jin Bok Han | Vacuum sucker |
| CN202431728U (en) * | 2012-01-07 | 2012-09-12 | 湖北太力家庭用品制造有限公司 | Novel vacuum sucker |
| CN203962657U (en) * | 2014-06-22 | 2014-11-26 | 张卫 | Loose-prevention type hook with sucker |
| CN204180141U (en) * | 2014-11-20 | 2015-02-25 | 王帆 | With the mobile phone of silicon rubber suction cup |
| CN204646963U (en) * | 2015-04-21 | 2015-09-16 | 中山市太力家庭用品制造有限公司 | A kind of Novel sucker |
| CN204851964U (en) * | 2015-06-03 | 2015-12-09 | 林伟福 | Powerful electromagnetic chuck device |
| CN206175454U (en) * | 2016-11-01 | 2017-05-17 | 晋江市东亨工业设计有限公司 | Sucking disc of breathing in |
-
2016
- 2016-11-01 CN CN201810026254.9A patent/CN108180211B/en active Active
- 2016-11-01 CN CN201610942430.4A patent/CN106438659B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2053203U (en) * | 1989-04-04 | 1990-02-21 | 沈阳重型机器厂 | Vacuum suction cup |
| CN1138553A (en) * | 1995-06-22 | 1996-12-25 | 日本比索株式会社 | Vaccum-suction attachement pad |
| CN201415911Y (en) * | 2009-03-10 | 2010-03-03 | 吕晓光 | Strong vacuum sucking device |
| CN102996611A (en) * | 2012-11-23 | 2013-03-27 | 南京理工大学 | Adsorbing unit with automatic switching behavior and adsorbing device |
| CN104100628A (en) * | 2014-06-22 | 2014-10-15 | 张卫 | Dropping prevention sucking disc pothook |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106438659A (en) | 2017-02-22 |
| CN108180211A (en) | 2018-06-19 |
| CN106438659B (en) | 2018-03-27 |
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Effective date of registration: 20221216 Address after: 413, Floor 4, Building B, Innovation Building, Linyi Hi tech Industrial Development Zone, Shandong Province, 276000 Patentee after: Linyi High tech Zone Jinlanling Labor Service Co.,Ltd. Address before: 350200 East Chengdong Development Zone, Dehua County, Quanzhou City, Fujian Province, Phase II, Area A, Area 8 Patentee before: DEHUA LIDE HOUSEHOLD ARTICLES Co.,Ltd. |
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Effective date of registration: 20230625 Address after: Room 4, Building 9, Mold Material Zone, Kunshan International Mold City, Yushan Town, Suzhou City, Jiangsu Province, 215331 Patentee after: KUNSHAN MINDRAY KAY PRECISION INDUSTRY CO.,LTD. Address before: 413, Floor 4, Building B, Innovation Building, Linyi Hi tech Industrial Development Zone, Shandong Province, 276000 Patentee before: Linyi High tech Zone Jinlanling Labor Service Co.,Ltd. |