WO2019208086A1 - ベルト式研削工具 - Google Patents
ベルト式研削工具 Download PDFInfo
- Publication number
- WO2019208086A1 WO2019208086A1 PCT/JP2019/013541 JP2019013541W WO2019208086A1 WO 2019208086 A1 WO2019208086 A1 WO 2019208086A1 JP 2019013541 W JP2019013541 W JP 2019013541W WO 2019208086 A1 WO2019208086 A1 WO 2019208086A1
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- WIPO (PCT)
- Prior art keywords
- outer peripheral
- peripheral portion
- belt
- drive pulley
- opening
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/06—Portable grinding machines, e.g. hand-guided; Accessories therefor with abrasive belts, e.g. with endless travelling belts; Accessories therefor
Definitions
- the present invention relates to a belt type grinding tool, and more particularly to a belt type grinding tool having a function of cooling an endless grinding belt.
- a belt-type grinding tool includes an idle pulley that is rotatably arranged, a drive pulley that is driven to rotate by a motor, and an endless grinding belt that is wound around the idle pulley and the drive pulley.
- an endless grinding belt that is rotationally driven is pressed against the object to be ground to grind the object to be ground (Patent Document 1).
- the endless grinding belt is heated by friction with the object to be ground during the grinding operation.
- the drive pulley and the motor shaft are also heated, and in particular, the bearings that rotate and support them are sometimes deteriorated by heat.
- a fan is provided on the driving roller, and the fan is rotated together with the driving roller to suck outside air into the tool.
- the sucked air passes through the inside of the driving roller and is guided into the dust bag by another dust collecting fan.
- air flows around the shaft of the driving roller and the bearing that rotatably supports the shaft, and these members are cooled by the air flow.
- An endless grinding belt is usually formed into an endless belt shape by adhering both ends of a belt-shaped material with an adhesive. However, if the bonded portion becomes too hot, the adhesive may dissolve and the belt may break. .
- the endless grinding belt is indirectly cooled to some extent by cooling the driving roller. However, the belt sander mainly cools the shaft and the bearing of the driving roller. The cooling effect on the grinding belt is not sufficient.
- an object of the present invention is to provide a belt type grinding tool capable of efficiently cooling an endless grinding belt wound around an idle pulley and a drive pulley.
- the present invention A tool body with a motor; An idle pulley that is rotatably attached to the tool body; A drive pulley having a cylindrical outer peripheral portion that is rotationally driven by the motor and supports an endless grinding belt that is wound around the idle pulley; A fan that is arranged at least partially inside the outer peripheral portion and rotates together with the drive pulley to generate an air flow that passes through the inner side of the outer peripheral portion in the direction of the rotation axis of the drive pulley; The cover has a cover plate portion disposed adjacent to one side edge of the outer peripheral portion in the direction of the rotation axis, and defines a receiving space for receiving the drive pulley between the tool body and the outer peripheral portion.
- An inner opening that opens into the housing space at a position radially inward of the outer peripheral portion with respect to the inner peripheral surface of the cover plate portion, and the housing space at a radially outer position of the outer peripheral portion with respect to the inner peripheral surface.
- An outer opening is formed on the cover, and In the accommodation space, a ventilation path that passes from the inner opening to the inside of the outer periphery, around the other side edge of the outer periphery, to the outer opening through the outside of the outer periphery, With When the fan is rotated, external air is sucked into the accommodation space from one of the inner opening and the outer opening, flows along the ventilation path, and flows into the inner opening. And a belt type grinding tool adapted to be discharged out of the accommodation space from the other of the outer opening and the outer opening.
- the air sucked into the housing space by the fan passes not only inside the outer periphery of the drive pulley but also outside. Therefore, not only the drive pulley but also the endless grinding belt supported on the outer peripheral surface of the outer peripheral portion is directly cooled. Thereby, the endless grinding belt can be cooled more efficiently, and breakage of the endless grinding belt due to heat can be prevented.
- the cover plate portion has a slot hole extending from a radially inner position of the inner peripheral surface of the outer peripheral portion to a radially outer position, and the inner opening portion and the outer opening portion. May be formed as part of the slot hole.
- the slot hole may be curved and extend with respect to the radial direction of the rotation axis.
- the opening area can be increased as compared with a straight hole, and air can be sucked into the accommodation space more efficiently.
- the slot hole is sized so that a human finger cannot enter.
- the “size that does not allow a human finger to enter” means a size that does not allow the test finger selected according to the use environment to pass into the accommodation space.
- the drive pulley further includes a center fixing portion that is connected to a rotation shaft that is drivingly connected to the motor, and a connection portion that extends from the outer peripheral portion to the center fixing portion.
- a through hole penetrating in the direction of the rotation axis is formed, and the ventilation path can pass through the through hole.
- the fan has a plurality of blades arranged at a first interval in the circumferential direction of the outer peripheral portion, and a plurality of the through holes are arranged at a second interval different from the first interval in the circumferential direction.
- a gap in the direction of the rotation axis can be formed between the fan and the connecting portion of the drive pulley. This makes it possible to prevent the through hole from being blocked by the fan.
- the present invention also provides A tool body with a motor; An idle pulley that is rotatably attached to the tool body; A drive pulley having a cylindrical outer peripheral portion that is rotationally driven by the motor and supports an endless grinding belt that is wound around the idle pulley; A fan that is arranged at least partially inside the outer peripheral portion and rotates together with the drive pulley to generate an air flow that passes through the inner side of the outer peripheral portion in the direction of the rotation axis of the drive pulley; The cover has a cover plate portion disposed adjacent to one side edge of the outer peripheral portion in the direction of the rotation axis, and defines a receiving space for receiving the drive pulley between the tool body and the outer peripheral portion.
- the cover plate portion enters the housing space at a position radially outside the inner peripheral surface of the outer peripheral portion from an inner opening portion that opens into the housing space at a radially inner position with respect to the inner peripheral surface of the outer peripheral portion.
- a cover formed with a slot hole extending to the open outer opening; With When the fan is rotated, outside air is sucked into the housing space from the slot hole, and is exhausted out of the housing space through the inside of the outer peripheral portion. Provide grinding tools.
- the slot hole provided in the cover extends from the inside to the outside of the outer peripheral portion of the drive pulley, when the external air is sucked into the accommodation space by the fan, the air is It comes to be sprayed to an outer peripheral part in a side edge. Further, the opening area of the slot hole is increased, and more air can be sucked. As a result, the drive pulley can be efficiently cooled.
- FIG. 2 is a partial sectional view taken along line AA in FIG. It is a figure which shows 2nd Embodiment of a cover. It is a figure which shows 3rd Embodiment of a cover. It is a figure which shows 4th Embodiment of a cover. It is a figure which shows 5th Embodiment of a cover.
- a belt-type grinding tool 10 is rotatably attached to a tool body 12 extending in the direction of the longitudinal axis L and a tip portion 14 of the tool body 12 as shown in FIGS. And an idle pulley 16 and a drive pulley 22 fixed to a rotary shaft 20 that is drivingly connected to an electric motor 18 of the tool body 12.
- An endless grinding belt 24 is wound between the idle pulley 16 and the drive pulley 22.
- the drive pulley 22 is rotationally driven counterclockwise as viewed in FIG. 2 by the electric motor 18, and the endless grinding belt 24 is also rotated in the same direction.
- a shoe 25 is attached to the tool body 12 along the inner peripheral surface 24a of the endless grinding belt 24, and the rotating endless grinding belt 24 is pressed against the object to be ground at a position supported by the shoe 25 from the inside. Thus, the grinding work is performed on the grinding object.
- the drive pulley 22 includes a cylindrical center fixing portion 26 that is fixed to the rotary shaft 20, a cylindrical outer peripheral portion 28 that supports the endless grinding belt 24, a center fixing portion 26, and an outer peripheral portion. And a connecting portion 30 extending in the radial direction with respect to the rotation axis R of the drive pulley 22 so as to connect the drive pulley 22.
- the drive pulley 22 is fixed to the rotary shaft 20 by a hexagon nut 32 screwed to the rotary shaft 20.
- Flange portions 34 for preventing the endless grinding belt 24 from falling off are provided on the side edges 28a, 28b on both sides of the outer peripheral portion 28 in the direction of the rotation axis R, respectively.
- a fan 36 is provided on the radially inner side of the outer peripheral portion 28 of the drive pulley 22.
- the fan 36 includes a center fixing portion 38 and blades 40 extending radially outward from the center fixing portion 38. As can be seen from FIG. 2, five blades 40 are arranged at equal intervals in the circumferential direction.
- the fan 36 is fixed to the hex nut 32 with a fixing screw 42 in a state where a part of the hex nut 32 is received in the center fixing portion 38.
- the inner peripheral surface 38a of the center fixing portion 38 that receives the hexagon nut 32 has a hexagonal shape that matches the outer diameter of the hexagon nut 32, and the fan 36 is securely fixed to the hexagon nut 32 in the rotational direction. I am doing so.
- the fixing screw 42 is fixed in a state where the end surface 42 a abuts against the end surface 20 a of the rotating shaft 20. Thereby, the hexagon nut 32 and the fixing screw 42 are made difficult to loosen.
- An O-ring 44 is disposed between the fan 36 and the hex nut 32, and this is for pressing the fan 36 against the head of the fixing screw 42 to prevent the fan 36 from rattling.
- the entire fan 36 is located inside the outer peripheral portion 28, the fan 36 may be shaped so that a part thereof protrudes outside the outer peripheral portion 28.
- a through hole 46 penetrating in the direction of the rotation axis R is formed in the connecting portion 30 of the drive pulley 22.
- the through holes 46 are partially hidden by the blades 40 of the fan 36 in FIG. 2, eight through holes 46 are provided at equal intervals in the circumferential direction. By disposing the blades 40 and the through holes 46 of the fan 36 at different intervals in the circumferential direction, all the through holes 46 can be attached to the drive pulley 22 in any direction in the rotational direction. It is possible to prevent the front of the camera from being blocked by the blades 40.
- a gap 48 in the direction of the rotation axis R is formed between the blade 40 of the fan 36 and the connecting portion 30 of the drive pulley 22, and the through hole 46 of the connecting portion 30 is blocked by the blade 40 of the fan 36. The air flow described later is not disturbed so as not to come off.
- the cover 52 is further attached to the tool body 12 with fixing screws 50.
- the cover 52 includes a fixing portion 54 that is fixed to the tool body 12 by a fixing screw 50, and a cover plate portion 56 that is disposed adjacent to one side edge 28a of the outer peripheral portion 28 in the direction of the rotation axis R.
- a housing space 58 for housing the drive pulley 22 is defined between the tool body 12 and the tool body 12.
- the cover plate portion 56 is provided with a plurality of slot holes 60 that are curved and extend with respect to the radial direction of the rotation axis R.
- the slot hole 60 extends from a radially inner position of the inner peripheral surface 28 c of the outer peripheral portion 28 of the drive pulley 22 to a radially outer position, and is positioned radially inward with respect to the inner peripheral surface 28 c of the outer peripheral portion 28.
- the inner opening 62 that opens into the receiving space 58 and the outer opening 64 that opens into the receiving space 58 at a radially outer position are provided.
- the slot hole 60 is sized so that a human finger does not enter the accommodation space 58. Specifically, the size is designed so that the test finger appropriately selected according to the use environment does not enter the accommodating space 58.
- the test finger used for the design of this embodiment is based on the international standard IEC60529. Near the center of the cover plate portion 56, an arrow-shaped hole 66 that indicates the rotational direction of the drive pulley 22 is formed.
- a ventilation path 68 as shown by an arrow in FIG.
- This ventilation path 68 passes from the inner opening 62 of the cover 52 to the inside of the outer peripheral portion 28 of the drive pulley 22, passes through the through hole 46 of the connecting portion 30, and then goes around the other side edge 28 b of the outer peripheral portion 28.
- the outer opening 28 is passed through the outer periphery 28 to reach the outer opening 64.
- the fan 36 disposed inside the drive pulley 22 is fixed with respect to the rotary shaft 20, and therefore rotates together with the drive pulley 22 when the drive pulley 22 is driven to rotate.
- the air further passes outside the outer peripheral portion 28 and is discharged from the outer opening 64 to the outside of the accommodation space 58. Part of the air discharged from the outer opening 64 is sucked into the accommodation space 58 from the inner opening 62 again after exiting the cover 52 along the slot hole 60 or once. Further, since the front portion 58b (the upper portion as viewed in FIGS. 1 and 2) and the lower portion 58c (the left portion as viewed in FIGS. 1 and 2) of the accommodation space 58 are open, the accommodation space 58 is open. A part of the air sucked into the inside passes through the through hole 46 and is then discharged out of the accommodation space 58 from the front portion 58b and the lower portion 58c. Since the front part 58b and the lower part 58c are parts through which the endless grinding belt 24 passes, a part of the air discharged from the front part 58b and the lower part 58c is blown to the endless grinding belt 24.
- the endless grinding belt 24 can be cooled more efficiently via the drive pulley 22. Further, since the air flowing through the ventilation path 68 directly hits the endless grinding belt 24 when passing outside the outer peripheral portion 28, the endless grinding belt 24 can be directly cooled. Thereby, the endless grinding belt 24 can be cooled more efficiently than the conventional belt-type grinding tool 10, and the endless grinding belt 24 can be prevented from being broken by heat.
- the slot hole 60 extends from the inner side to the outer side of the outer peripheral portion 28 of the drive pulley 22 and is also located at one side edge 28 a of the outer peripheral portion 28.
- the air is blown to the outer peripheral portion 28 at the side edge 28a.
- This also makes it possible to efficiently cool the drive pulley 22 and more reliably prevent breakage of the endless grinding belt 24 due to heat.
- the endless grinding belt 24 can be cooled also by this.
- the shape and arrangement of the inner opening 62 and the outer opening 64 provided in the cover 52 can be arbitrarily changed.
- the inner opening 162 and the outer opening 164 are formed as independent holes.
- air cannot be blown to the outer peripheral portion 28 of the drive pulley 22.
- the slot hole 260 is bent so that the area of the outer opening 264 becomes larger.
- the curved direction of the slot hole 360 is opposite to that of the cover 52 in FIG.
- straight long slot holes 460-1 and short slot holes 460-2 are alternately arranged in the circumferential direction.
- the shapes and arrangements of these slot holes and the inner and outer openings are merely examples, and other forms may be adopted.
- the present invention is not limited to these embodiments.
- external air is sucked from the inner opening and discharged from the outer opening.
- the rotation direction of the drive pulley is reversed or the direction of the fan blades is reversed.
- the air may flow in the opposite direction. That is, external air is sucked into the housing space from the outer opening, passes through the outer periphery of the drive pulley, passes around the other side edge of the outer periphery, passes through the through hole of the connecting portion, and You may make it discharge
- both the configuration in which the air sucked into the housing space is directly blown to the outer peripheral portion of the drive pulley and the configuration in which the air flows along the ventilation path passing through the inner side and the outer side of the outer peripheral portion are provided. It is not necessary to provide a cooling effect that is sufficiently superior to that of the prior art. Further, the number of fan blades and the number of through holes in the connecting portion may be changed.
- the said embodiment is an electric belt type grinding tool provided with an electric motor, it is good also as a pneumatic belt type grinding tool which employ
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
Abstract
Description
モータを備える工具本体と、
該工具本体に対して回転自在に取り付けられたアイドルプーリと、
該モータによって回転駆動され、該アイドルプーリとの間に掛け回される無端研削ベルトを支持する筒状の外周部を有するドライブプーリと、
少なくとも一部が該外周部の径方向内側に配置され、該ドライブプーリとともに回転して該外周部の内側を該ドライブプーリの回転軸線の方向に通過する空気の流れを生じさせるファンと、
該外周部の一方の側端縁に該回転軸線の方向で隣接して配置されるカバープレート部を有し、該工具本体との間に該ドライブプーリを収容する収容空間を画定するカバーであって、該カバープレート部に該外周部の内周面に対する径方向内側の位置で該収容空間に開口する内側開口部、及び該外周部の該内周面に対する径方向外側の位置で該収容空間に開口する外側開口部が形成されている、カバーと、
該収容空間内において、該内側開口部から該外周部の内側を通り、該外周部の他方の側端縁を廻り、該外周部の外側を通って該外側開口部に至る通気経路と、
を備え、
該ファンが回転されたときに、外部の空気が該内側開口部と該外側開口部とのうちの一方から該収容空間の中に吸引され、該通気経路に沿って流れて、該内側開口部と該外側開口部とのうちの他方から該収容空間の外に排出されるようにされた、ベルト式研削工具を提供する。
モータを備える工具本体と、
該工具本体に対して回転自在に取り付けられたアイドルプーリと、
該モータによって回転駆動され、該アイドルプーリとの間に掛け回される無端研削ベルトを支持する筒状の外周部を有するドライブプーリと、
少なくとも一部が該外周部の径方向内側に配置され、該ドライブプーリとともに回転して該外周部の内側を該ドライブプーリの回転軸線の方向に通過する空気の流れを生じさせるファンと、
該外周部の一方の側端縁に該回転軸線の方向で隣接して配置されるカバープレート部を有し、該工具本体との間に該ドライブプーリを収容する収容空間を画定するカバーであって、該カバープレート部に該外周部の内周面に対する径方向内側の位置で該収容空間に開口する内側開口部から該外周部の該内周面に対する径方向外側の位置で該収容空間に開口する外側開口部にまで延びるスロット穴が形成されている、カバーと、
を備え、
該ファンが回転されたときに、外部の空気が該スロット穴から該収容空間の中に吸引され、該外周部の内側を通って該収容空間の外に排出されるようにされた、ベルト式研削工具を提供する。
12 工具本体
14 先端部
16 アイドルプーリ
18 電動モータ
20 回転軸
20a 端面
22 ドライブプーリ
24 無端研削ベルト
24a 内周面
25 シュー
26 中心固定部
28 外周部
28a 側端縁
28b 側端縁
28c 内周面
30 連結部
32 六角ナット
34 フランジ部
36 ファン
38 中心固定部
38a 内周面
40 羽根
42 固定ネジ
42a 端面
44 Oリング
46 貫通孔
48 隙間
50 固定ネジ
52 カバー
54 固定部
56 カバープレート部
58 収容空間
58a 内周面
58b 前方部分
58c 下方部分
60 スロット穴
62 内側開口部
64 外側開口部
66 矢印形状の穴
68 通気経路
152 カバー
162 内側開口部
164 外側開口部
252 カバー
260 スロット穴
264 外側開口部
352 カバー
360 スロット穴
452 カバー
460-1 長いスロット穴
460-2 短いスロット穴
L 長手軸線
R 回転軸線
Claims (9)
- モータを備える工具本体と、
該工具本体に対して回転自在に取り付けられたアイドルプーリと、
該モータによって回転駆動され、該アイドルプーリとの間に掛け回される無端研削ベルトを支持する筒状の外周部を有するドライブプーリと、
少なくとも一部が該外周部の径方向内側に配置され、該ドライブプーリとともに回転して該外周部の内側を該ドライブプーリの回転軸線の方向に通過する空気の流れを生じさせるファンと、
該外周部の一方の側端縁に該回転軸線の方向で隣接して配置されるカバープレート部を有し、該工具本体との間に該ドライブプーリを収容する収容空間を画定するカバーであって、該カバープレート部に該外周部の内周面に対する径方向内側の位置で該収容空間に開口する内側開口部、及び該外周部の該内周面に対する径方向外側の位置で該収容空間に開口する外側開口部が形成されている、カバーと、
該収容空間内において、該内側開口部から該外周部の内側を通り、該外周部の他方の側端縁を廻り、該外周部の外側を通って該外側開口部に至る通気経路と、
を備え、
該ファンが回転されたときに、外部の空気が該内側開口部と該外側開口部とのうちの一方から該収容空間の中に吸引され、該通気経路に沿って流れて、該内側開口部と該外側開口部とのうちの他方から該収容空間の外に排出されるようにされた、ベルト式研削工具。 - 該カバープレート部が、該外周部の該内周面の径方向内側の位置から径方向外側の位置にまで延びるスロット穴を有し、該内側開口部と該外側開口部とが該スロット穴の一部として形成されている、該請求項1に記載のベルト式研削工具。
- 該スロット穴が、該回転軸線の放射方向に対して湾曲して延びている、請求項2に記載のベルト式研削工具。
- 該スロット穴が人の指が入らない大きさとされている、請求項2又は3に記載のベルト式研削工具。
- 該ドライブプーリが、該モータに駆動連結された回転軸に連結される中心固定部と、該外周部から該中心固定部にまで延びる連結部とをさらに備え、該連結部に該回転軸線の方向に貫通する貫通孔が形成されており、該通気経路が該貫通孔を通るようにされた、請求項1乃至4のいずれか一項に記載のベルト式研削工具。
- 該ファンが回転されたときに、外部の空気が、該通気経路に沿って、該内側開口部から該収容空間の中に吸引され、該外周部の内側を通り、該貫通孔を通過してから該外周部の該他方の側端縁を廻り、該外周部の外側を通って該外側開口部から該収容空間の外に排出されるようにされた、請求項5に記載のベルト式研削工具。
- 該ファンが該外周部の周方向に第1間隔で配置された複数の羽根を有し、該貫通孔が該周方向に該第1間隔とは異なる第2間隔で複数配置されている、請求項5又は6に記載のベルト式研削工具。
- 該ファンと該ドライブプーリの該連結部との間に該回転軸線の方向での隙間が形成されている、請求項5乃至7のいずれか一項に記載のベルト式研削工具。
- モータを備える工具本体と、
該工具本体に対して回転自在に取り付けられたアイドルプーリと、
該モータによって回転駆動され、該アイドルプーリとの間に掛け回される無端研削ベルトを支持する筒状の外周部を有するドライブプーリと、
少なくとも一部が該外周部の径方向内側に配置され、該ドライブプーリとともに回転して該外周部の内側を該ドライブプーリの回転軸線の方向に通過する空気の流れを生じさせるファンと、
該外周部の一方の側端縁に該回転軸線の方向で隣接して配置されるカバープレート部を有し、該工具本体との間に該ドライブプーリを収容する収容空間を画定するカバーであって、該カバープレート部に該外周部の内周面に対する径方向内側の位置で該収容空間に開口する内側開口部から該外周部の該内周面に対する径方向外側の位置で該収容空間に開口する外側開口部にまで延びるスロット穴が形成されている、カバーと、
を備え、
該ファンが回転されたときに、外部の空気が該スロット穴から該収容空間の中に吸引され、該外周部の内側を通って該収容空間の外に排出されるようにされた、ベルト式研削工具。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020207029689A KR102237638B1 (ko) | 2018-04-27 | 2019-03-28 | 벨트식 연삭 공구 |
EP19792609.0A EP3785848B1 (en) | 2018-04-27 | 2019-03-28 | Belt type grinding tool |
CN201980025338.3A CN112004639B (zh) | 2018-04-27 | 2019-03-28 | 带式磨削工具 |
JP2019537001A JP6781844B2 (ja) | 2018-04-27 | 2019-03-28 | ベルト式研削工具 |
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JP2018086634 | 2018-04-27 | ||
JP2018-086634 | 2018-04-27 |
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WO2019208086A1 true WO2019208086A1 (ja) | 2019-10-31 |
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PCT/JP2019/013541 WO2019208086A1 (ja) | 2018-04-27 | 2019-03-28 | ベルト式研削工具 |
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EP (1) | EP3785848B1 (ja) |
JP (1) | JP6781844B2 (ja) |
KR (1) | KR102237638B1 (ja) |
CN (1) | CN112004639B (ja) |
TW (1) | TWI687279B (ja) |
WO (1) | WO2019208086A1 (ja) |
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JP2014166668A (ja) | 2013-02-28 | 2014-09-11 | Nitto Kohki Co Ltd | ベルト式研削工具 |
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JPH0613827A (ja) | 1992-06-29 | 1994-01-21 | Toshiba Corp | 信号の圧縮伸張切替回路 |
JP3711095B2 (ja) | 2002-07-30 | 2005-10-26 | 日東工器株式会社 | ベルト式研削工具 |
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JP3910944B2 (ja) | 2003-07-08 | 2007-04-25 | 日東工器株式会社 | 手持ち式無端ベルト駆動式切削工具 |
US7338348B2 (en) * | 2003-08-29 | 2008-03-04 | Black & Decker Inc. | Dust collection system for a belt sander |
TWM278509U (en) * | 2005-05-24 | 2005-10-21 | Ruei-Sen Liau | Grinding machine |
JP2008207295A (ja) * | 2007-02-27 | 2008-09-11 | Hitachi Koki Co Ltd | 電動工具 |
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TWM353065U (en) * | 2008-10-31 | 2009-03-21 | Colovos Company | Structural improvement for eliminating debris and collecting dust from sand grinder |
JP5303600B2 (ja) * | 2011-04-08 | 2013-10-02 | リョービ株式会社 | 手持ち式ベルトサンダ |
TWI571354B (zh) * | 2015-02-05 | 2017-02-21 | X`Pole Prec Tools Inc | Improve the heat efficiency of the electric grinding hand tools |
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JP6568997B2 (ja) * | 2016-03-11 | 2019-08-28 | 日東工器株式会社 | ベルト式研削工具 |
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2019
- 2019-03-28 WO PCT/JP2019/013541 patent/WO2019208086A1/ja active Application Filing
- 2019-03-28 CN CN201980025338.3A patent/CN112004639B/zh active Active
- 2019-03-28 EP EP19792609.0A patent/EP3785848B1/en active Active
- 2019-03-28 KR KR1020207029689A patent/KR102237638B1/ko active IP Right Grant
- 2019-03-28 JP JP2019537001A patent/JP6781844B2/ja active Active
- 2019-04-10 TW TW108112449A patent/TWI687279B/zh active
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See also references of EP3785848A4 |
Also Published As
Publication number | Publication date |
---|---|
CN112004639B (zh) | 2022-05-27 |
TWI687279B (zh) | 2020-03-11 |
EP3785848A1 (en) | 2021-03-03 |
JP6781844B2 (ja) | 2020-11-04 |
KR20200122408A (ko) | 2020-10-27 |
TW202003152A (zh) | 2020-01-16 |
KR102237638B1 (ko) | 2021-04-07 |
JPWO2019208086A1 (ja) | 2020-04-30 |
EP3785848B1 (en) | 2023-07-26 |
CN112004639A (zh) | 2020-11-27 |
EP3785848A4 (en) | 2022-01-19 |
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