Patents Assigned to KOKI HOLDINGS CO., LTD.
  • Patent number: 11491625
    Abstract: Provided is a driving machine capable of stabilizing a relationship between timing when a first movable member starts operating in a first directing and timing when a second movable member starts operating in a second direction. The driving machine including a first movable member 12 operable in a first direction D1 and a second direction D2, and a second movable member 18 operable in the first direction D1 and the second direction D2 has a first regulating mechanism, a second regulating mechanism, and a third regulating mechanism 71, and the third regulating mechanism is held in a first state when the first movable member 12 is prevented from operating in the first direction D1, and the third regulating mechanism 71 switches from the first state to the second state when the first movable member 12 is allowed to operate in the first direction D1 and operates.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: November 8, 2022
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventors: Tetsuhito Shige, Daiki Kiyohara, Yoshiichi Komazaki, Masashi Nishida
  • Patent number: 11491629
    Abstract: A driver capable of suppressing increase in a load torque of a motor when a striking mechanism is moved by the torque of the motor against a force of a first moving mechanism is provided. The driver includes a striking mechanism 12 movable in a first direction B1 and a second direction B2 opposite to the first direction B1 and a first moving mechanism configured to move the striking mechanism 12 in the first direction B1 to strike a fastener, and the driver further includes a motor, a second moving mechanism 45 rotated by the torque of the motor and configured to move the striking mechanism 12 in the second direction against a force of the first moving mechanism, and torque suppression mechanisms 45A to 45H configured to suppress increase in the torque of the motor when the striking mechanism 12 is moved in the second direction B2.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: November 8, 2022
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventors: Takeshi Saitou, Tetsuhito Shige, Daiki Kiyohara, Masashi Nishida
  • Patent number: 11490543
    Abstract: A DC power supply device includes a housing including a wall portion, a first opening and a second opening, a circuit portion, a regulation wall portion, and a fan. The first and second openings are formed in the wall portion. The circuit portion includes first and second circuit elements those fixed within the housing. The regulation wall portion provide a first air passage in communication with the first opening, a second air passage in communication with the second opening, and a bent air passage allowing the first air passage and the second air passage to communicate with each other. The fan is configured to generate an air-flow flowing between the first air passage and the second air passage. The fan is positioned to face the first opening. The first circuit element is positioned in the first air passage. The second circuit element is positioned in the second air passage.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: November 1, 2022
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventors: Naoto Ichihashi, Takuya Yoshinari, Yuji Kishima
  • Patent number: 11489407
    Abstract: Provided is an electrically powered tool having an improved sensor substrate mounting structure, the electrically powered tool being configured so that a brushless type motor is axially contained in a cylindrical housing. The electrically powered tool has: a cylindrical housing for axially containing a motor; a control unit for controlling the motor; and a sensor substrate having mounted thereon a plurality of position detecting elements for detecting the rotational position of a rotor. The sensor substrate is gripped between the insulator of the motor and the housing and held on the housing side when axially mounting the motor. The sensor substrate is annularly shaped and has formed at the center thereof a through-hole through which a bearing for the motor is passed. The portion of the sensor substrate, on which a Hall IC is mounted, is provided with a synthetic resin cover member for protecting the Hall IC against dust.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: November 1, 2022
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Ryo Suzuki, Ken Miyazawa
  • Publication number: 20220341432
    Abstract: A blower has: a fan generating an air flow in an axial direction of a rotary shaft; a tubular motor holder 30 formed in a tubular shape and holding the motor radially inside thereof; and a fan case part accommodating the motor, the motor holder, and the fan and forming an air flow path. A first rectification parts that is integrally formed is provided on an inside portion of the fan case part. The first rectification part is formed in a rib shape by a first to fourth blade, weakens a rotational component of a flow of air discharged from the fan, and guides the air to smoothly flow in the axial direction. The motor holder is configured so as to have an axial length smaller than the motor.
    Type: Application
    Filed: July 31, 2020
    Publication date: October 27, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Mikihiro KATAOKA, Naoto ICHIHASHI
  • Patent number: 11472012
    Abstract: A driver includes: a pressure chamber and a striking portion actuated in a direction of striking a fastener when compressed gas is supplied to the pressure chamber, and can select a single firing and a continuous firing; a switching mechanism having a first actuated state to actuate the striking portion in the direction when the single firing is selected and a second actuated state to block the striking portion from being actuated in the direction when the continuous firing is selected; and a control unit configured to switch the switching mechanism from the first actuated state to the second actuated state when a predetermined time elapses in a state where the continuous firing is selected and the switching mechanism is in the first actuated state. The control unit stops the power supply to the switching mechanism for at least part of a period of time when the predetermined time elapses.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: October 18, 2022
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventor: Kazuhiro Ootsuka
  • Patent number: 11469699
    Abstract: In the work device that has a self-holding circuit (61) maintaining power supply from a power supply circuit (12) by output from a microcomputer (40) and has a structure in which stopping output to the self-holding circuit (61) causes interruption of power supply from the power supply circuit (12) to the microcomputer (40), the firmware of the microcomputer (40) is made to be rewritable and a power holding unit (condenser C1) for temporarily continuing power supply to the microcomputer (40) is provided, thereby realizing a so-called “off-delay timer function” for restarting the microcomputer (40). This configuration enables maintenance of power to the microcomputer (40) after update of the firmware even in a work device that cannot be restarted once power has been turned off unless trigger operation is performed, thereby enabling automatic restart of the microcomputer 40 after resetting is enabled.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: October 11, 2022
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Yuki Ishikawa, Hayato Yamaguchi, Tomomasa Nishikawa, Masashi Takehisa, Tatsuya Ito
  • Publication number: 20220302510
    Abstract: A battery pack and an electric apparatus are provided. The battery pack is configured to be connectable to an electric apparatus main body of the electric apparatus. The battery pack includes: a first cell unit, including a first plurality of battery cells connected to each other, a first positive terminal, and a first negative terminal; a second cell unit, including a second plurality of battery cells connected to each other, a second positive terminal, and a second negative terminal; a microcomputer; and a casing, accommodating the first cell unit, the second cell unit, and the microcomputer. The first cell unit and the second cell unit are configured to be switched a connection state each other. The microcomputer is configured to be electrically connected to a positive terminal and a negative terminal of one of the first cell unit and the second cell unit and to be provided a power from the one of the first cell unit and the second cell unit.
    Type: Application
    Filed: June 6, 2022
    Publication date: September 22, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Yasushi Nakano, Satoshi YAMAGUCHI, Hiroyuki HANAWA, Kazuhiko FUNABASHI, Tomomasa NISHIKAWA, Shota KANNO, Toshio Mizoguchi, Takuya Teranishi
  • Patent number: 11446806
    Abstract: A reciprocating tool includes: a motor; a gear case; a converting mechanism; a plunger; a sealing member; and an auxiliary sealing member. The converting mechanism is accommodated in the gear case and configured to convert rotating motion of the motor into reciprocating movement in a predetermined direction. The plunger is provided with a mounting portion on which an end bit is mountable, and is reciprocally movably supported to the gear case. The plunger is driven by the converting mechanism to reciprocally move in the predetermined direction. The plunger is reciprocally movably inserted into the sealing member in the predetermined direction. The sealing member is supported by the gear case. The auxiliary sealing member is supported by the sealing member and sealing an outer peripheral surface of the plunger.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: September 20, 2022
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventors: Takaaki Onishi, Toshihiko Tachibana, Shogo Shibata
  • Patent number: 11446803
    Abstract: A driver includes a pressure chamber, a striking portion, an operation member, and a contact member, and can select a first mode and a second mode. The driver further includes a first ventilation passage, a second ventilation passage, and opening/closing mechanisms. The opening/closing mechanisms have a first state to open the first ventilation passage and close the second ventilation passage in the first mode, a second state, when an operation force is applied to the operation member within a time from when the second mode is selected and the contact member contacts a workpiece, to close the first ventilation passage and open the second ventilation passage, and a third state, when an operation force is applied to the operation member within a time from when the second mode is selected and the contact member is separated from the workpiece, to close the second ventilation passage.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: September 20, 2022
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventor: Toshinori Yasutomi
  • Patent number: 11446801
    Abstract: A driver capable of improving a timing of feeding of a fastener to an injection unit is provided. In a driver including an injection unit to which a fastener is fed, and a striking unit configured to strike the fastener of the injection unit when moving from a first position to a second position, the driver further includes: an operational member operated by an operator; moving mechanisms that stop and move the striking unit when the operational member is operated; a feeder that feeds the fastener to the injection unit; and a power mechanism that stops the feeder during a period of stoppage of the striking unit and that moves the feeder to feed the fastener to the injection unit during a period from start of movement of the striking unit by the operation of the operational member to a moment before the striking of the fastener.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: September 20, 2022
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventors: Sotaro Aizawa, Yoshiichi Komazaki
  • Patent number: 11440166
    Abstract: An impact tool and method can include: a motor; a trigger; a controller configured to control driving power supplied to the motor using a semiconductor switching element according to an operation of the trigger; a striking mechanism configured to drive a tip tool continuously or intermittently by rotation force of the motor, the striking mechanism including a hammer and an anvil. The controller drives the semiconductor switching element at a high duty ratio when the trigger is manipulated. The motor can be driven so that the duty ratio is lowered before a first striking of the hammer on the anvil is performed and the first striking is performed at a low duty ratio lower than the high duty ratio.
    Type: Grant
    Filed: February 16, 2020
    Date of Patent: September 13, 2022
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventors: Kazutaka Iwata, Yoshihiro Komuro
  • Patent number: 11418094
    Abstract: Providing an electric tool with excellent cooling efficiency. An electric tool includes: a housing 2; a motor 3; a fan 34; a sensing portion 41; a switching portion 42; and a circuit board 40. The motor 3 is accommodated in the housing 2. The motor 3 includes a stator 33, a rotor 32, and a rotating shaft 31. The rotor 32 is rotatable relative to the stator 33. The rotating shaft 31 is rotatable together with the rotor 32. The fan 34 is configured to generate a cooling air flow inside the housing 2. The sensing portion 41 is configured to detect a rotated position of the rotor 32. The switching portion 41 controls a rotation of the rotor 32. The sensing portion 41 and the switching portion 42 are mounted on the circuit board 40.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: August 16, 2022
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventors: Akira Matsushita, Tomomasa Nishikawa, Yuta Noguchi, Takahiro Hirai
  • Patent number: 11411277
    Abstract: The purpose of the invention is to provide a battery pack and a power tool on which the same can be detachably mounted such that compatibility can be ensured even if the dimensions of the battery cells therefor are changed, as well as a battery pack and power tool set. A second battery pack is provided with second battery cells, a second case which houses the second battery cells, a second latch portion for mounting the second battery pack to the power tool, and a second latch operating portion. The second battery pack has a larger case width than that of a specified battery pack for housing battery cells shorter than the second battery cells. However, as the rail width is the same, the second battery pack can be detachably mounted to the power tool in place of the specified battery pack.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: August 9, 2022
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Tomomasa Nishikawa, Satoru Matsuno, Mitsutaka Sakamoto
  • Publication number: 20220241877
    Abstract: Provided is a power tool capable of suitably fixing an auxiliary member to a base pedestal. The power tool has a base 30 having a sliding surface capable of sliding on a workpiece, and an auxiliary member 60 that is attachable to the base 30 and has a guiding surface 61. The power tool also has a wing bolt 33 and a leaf spring 35 as a pressing mechanism capable of pressing an extension part 62 of the auxiliary member 60. An operator can change a pressing force of the wing bolt 33 to the auxiliary member 60 by changing the position of the wing bolt 33 in a pressing direction. The leaf spring 35 applies a predetermined pressing force to the auxiliary member 60 even in the absence of the pressing force of the wing bolt 33 to the auxiliary member 60.
    Type: Application
    Filed: June 26, 2020
    Publication date: August 4, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Yoshiaki Osada, Shinji Kuragano, Takeru Kumakura
  • Publication number: 20220240741
    Abstract: Provided is a vacuum cleaner comprising: a main body housing 10 which houses a motor and a fan and which has an intake by which an airflow created by the fan enters inside; and a dust collection unit which is attachable to and detachable from the main body housing 10 so as to cover the intake. The main body housing 10 has an attachment-receiving part 30 with a common shape such that a cyclonic dust collection unit 50 which separates fine particles using a cyclonic air flow and a dust collection unit which carries out dust collection by filtration without using centrifugal force can be interchangeably attached to and detached from the main body housing as the dust collection unit.
    Type: Application
    Filed: June 26, 2020
    Publication date: August 4, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Naoto ICHIHASHI, Hiroyuki TAGAMI
  • Publication number: 20220223949
    Abstract: A battery pack includes: a connection terminal group including a positive electrode terminal and a negative electrode terminal, which are connected to a battery cell; a wireless communication unit for performing a wireless communication with an external device; a wireless control circuit for controlling the wireless communication unit; and a circuit board on which the wireless communication unit is mounted. The wireless communication unit includes an antenna wire that is extended along the surface of the circuit board; a rubber sheet member is provided so as to cover the upper surface of the wireless communication unit; and a resin layer is formed so as to cover a soldered portion of an electronic element that is mounted in a region of the circuit board other than the rubber sheet member. The rubber sheet member is provided with a notch so as to expose the antenna wire portion to the outside.
    Type: Application
    Filed: May 15, 2020
    Publication date: July 14, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Toshiaki Masumori, Satoshi Yamaguchi, Hiroyuki Hanawa
  • Publication number: 20220216799
    Abstract: A DC power supply device includes a first conversion unit connected to an AC power supply, a second conversion unit connected to an electric tool, and a cable connecting the first conversion unit and the second conversion unit to each other. The first conversion unit includes a power factor correction circuit, converts an AC voltage having a first voltage value, input from the AC power supply, into a DC voltage having a second voltage value higher than the first voltage value, and outputs the DC voltage having the second voltage value to the cable. The second conversion unit converts the output voltage of the first conversion unit, input via the cable, into a DC voltage having a third voltage value lower than the second voltage value, and outputs the DC voltage having the third voltage value to the electric tool.
    Type: Application
    Filed: June 28, 2019
    Publication date: July 7, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Takuya YOSHINARI, Yuji KISHIMA, Eiji NAKAYAMA, Kazuhiko FUNABASHI, Haruhisa FUJISAWA
  • Patent number: 11367907
    Abstract: A battery pack includes cell units in which upper and lower battery cells are connected in series, wherein an output of series-connection and an output of parallel-connection can be switched. The cell units are respectively provided with protection circuit ICs for monitoring the state of the battery cells, and only the protection circuit on the lower cell unit side is provided with a controller 350 including a microcomputer. To adjust the power consumption for the microcomputer only provided in the lower cell unit, the circuit on the upper cell unit side is provided with a current consumption control means including dummy loads. The current consumption control means is operated in conjunction with the start-up of the microcomputer in the controller so as to equalize power consumption on the upper cell unit side and the lower cell unit side.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: June 21, 2022
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Yasushi Nakano, Satoshi Yamaguchi, Hiroyuki Hanawa, Kazuhiko Funabashi, Tomomasa Nishikawa, Shota Kanno, Toshio Mizoguchi, Takuya Teranishi
  • Patent number: D962031
    Type: Grant
    Filed: December 8, 2020
    Date of Patent: August 30, 2022
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Shingo Kosugi, Rui Akiba, Shota Takeuchi