Patents Assigned to Tsubakimoto Chain Co.
  • Publication number: 20210285516
    Abstract: A seal chain includes two inner link plates opposed to and spaced apart from each other, a tubular bushing, opposite ends of the bushing being respectively joined to the two inner link plates, a pin rotationally inserted into the bushing, a tubular roller into which the bushing is inserted, the roller being rotationally supported by the bushing, and two outer link plates arranged to externally hold the two inner link plates in between, opposite ends of the pin being respectively joined to the two outer link plates. A recess into which an end of the roller is inserted is formed in an inner surface of each of the inner link plates.
    Type: Application
    Filed: October 3, 2017
    Publication date: September 16, 2021
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Takuya Yasu, Makoto Fujiwara, Yusuke Nishizawa
  • Publication number: 20210285517
    Abstract: An elongated object guiding device includes links arranged in series. Adjacent ones of the links are pivotally coupled to each other. An accommodation chamber is defined in the links. Each link includes an inner recess, an inner projection, an outer recess, and an outer projection that limit a pivoting range of the link and an adjacent link so that the links are pivoted between a straight state and a bent state. Each link includes a separating member that separates elongated objects accommodated in the accommodation chamber from each other. Each separating member is pivotally coupled to an adjacent separating member. Each separating member includes a through-hole and a sliding portion that limit a pivoting range of the separating member and an adjacent separating member so that a limit on a first side of the pivoting range is the straight state.
    Type: Application
    Filed: September 22, 2017
    Publication date: September 16, 2021
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Takayuki Tetsuka, Tamaki Shiki
  • Publication number: 20210285537
    Abstract: An object of the present invention is to provide a chain guide that can improve functional properties of a chain drive system. The chain guide of the present invention is attached to an engine block by a mounting bolt and slidably guides a running chain. The chain guide includes a mounting part provided with a shaft hole through which a mounting bolt is passed, and an oil jet passage for injecting lubricating oil, supplied to the shaft hole at a predetermined pressure, toward the chain.
    Type: Application
    Filed: December 29, 2020
    Publication date: September 16, 2021
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventor: Koichi Shimosaka
  • Publication number: 20210231194
    Abstract: An elongate object guiding device is provided with a protective guiding portion, guide rails, rollers, and magnets. The guide rails have magnetic guide surfaces that guide the protective guiding portion when the protective guiding portion reciprocates in a longitudinal direction while forming a cured part. The rollers are provided on the protective guiding portion, and are disposed in such a way as to be capable of rolling along the guide surfaces. The magnets are provided on the protective guiding portion in such a way as not to come into contact with the guide rails, and cause a magnetic force to act on the guide surfaces in such a way as to maintain a state of contact between the rollers and the guide surfaces.
    Type: Application
    Filed: July 24, 2019
    Publication date: July 29, 2021
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventor: Takayuki Tetsuka
  • Patent number: 11028908
    Abstract: To provide a tensioner and a relief valve unit that enable a reduction in the number of parts to be processed and the number of assembling steps, reduce the amount of oil flowing out to the outside, prevent damage to the check valve, and improve the oil recovery rate. The relief valve unit that releases oil when pressure inside an oil pressure chamber reaches or exceeds a predetermined high pressure includes a check valve unit that stops reverse flow of oil flowing into the oil pressure chamber as a valve element, the check valve unit being slidably inserted in the relief valve unit. The relief valve unit includes a unit pressing spring that presses the check valve unit toward a relief valve seat. The check valve unit includes an oil passage for allowing oil to flow between an inner side and an outer side of the check valve unit.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: June 8, 2021
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Masanori Watanabe, Yuji Kurematsu
  • Publication number: 20210156456
    Abstract: An object of the present invention is to provide a tensioner lever that can reduce vibration and noise when the chain runs, and realize smooth attachment into an engine with minimal deformation of the lever body with a simple configuration. A tensioner lever according to the present invention includes a lever body and a torsion coil spring pressed the lever body toward the chain. The lever body includes a stopper member mounting part where a stopper member by which the support arm of the torsion coil spring is locked and which retains the torsion coil spring in a compressed state is removably mounted. The stopper member mounting part is located closer to a distal end of the lever body than a center position in the longitudinal direction of the lever body, or a center of gravity position of the lever body.
    Type: Application
    Filed: September 29, 2020
    Publication date: May 27, 2021
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Masanori Watanabe, Shuji Hamaguchi
  • Patent number: 11009114
    Abstract: Provided is a sprocket which suppresses generation of order sounds corresponding to cycles and prevents increase in tension fluctuations, noise, and vibrations caused by resonance while alleviating the influence of the tension fluctuations corresponding to load torque fluctuations and suppressing noise and vibrations. A plurality of teeth formed to engage with a chain are arranged to form a phase fluctuation pattern of a waveform having a phase which fluctuates between positive and negative sides, and the phase fluctuation pattern is set to have parts having different wavelengths.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: May 18, 2021
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Yuji Kurematsu, Tsuyoshi Kabai, Kazuyuki Ebinuma
  • Patent number: 11002343
    Abstract: Provided is a tensioner capable of reducing a machining or mounting load and preventing leakage of oil from a surface for mounting a tensioner with a simple configuration. A tension body having a plunger-receiving hole into which a plunger is slidably inserted is configured to have a projection portion on a mounting surface that face a wall surface having an oil discharge hole of amounting target object. The projection portion is configured to be inserted into the oil discharge hole and to be continuously connected to the oil supply path formed in the tensioner body to form an oil passage.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: May 11, 2021
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventor: Yoji Sato
  • Publication number: 20210131531
    Abstract: An object of the present invention is to provide a tensioner lever capable of consistently exerting appropriate reaction force to various tension fluctuations in conjunction with varying chain behavior, and reducing vibration and noise when the chain runs. The tensioner lever of the present invention includes a torsion coil spring having a pressing arm in which a distal end portion abuts on a lever body to form a first load point, and a support arm in which a distal end portion abuts on a support part provided to an attachment surface to form a first support point. The tensioner lever further includes a spring load adaption structure configured to form one or both of a second loading point and a second support point when a certain level or more of load is received from the chain.
    Type: Application
    Filed: September 29, 2020
    Publication date: May 6, 2021
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventor: Kenji Muratsubaki
  • Patent number: 10982737
    Abstract: To provide a simple-structured tensioner that generates less knocking noise at the start-up of the engine and that prevents an excessive chain tension, severe friction, noise or vibration during the running of the engine, while also reducing production costs. The tensioner includes a ring control mechanism that controls the position of a resilient ring. The ring control mechanism includes a front-side restricting part having a front-side restricting surface and capable of restricting forward movement of the resilient ring, and a rear-side restriction member having a rear-side restricting surface and capable of restricting rearward movement of the resilient ring. The front-side restricting part is fixed to or formed integrally with the housing. The rear-side restriction member is disposed movable in a front to back direction relative to the housing and the plunger.
    Type: Grant
    Filed: June 6, 2019
    Date of Patent: April 20, 2021
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventor: Yuji Kurematsu
  • Publication number: 20210102613
    Abstract: To provide a rotating member and a forming method thereof that allow formation of protrusions biting into an opposite surface to achieve high slip torque with a simple configuration. The rotating member includes a boss part and an anti-slip surface at least on one of both axial end faces of the boss part. The anti-slip surface has a plurality of corrugated rib parts, which includes a main groove and at least one auxiliary groove extending parallel to the main groove, with a ridge protruding higher than the anti-slip surface between the main groove and the auxiliary groove.
    Type: Application
    Filed: August 6, 2020
    Publication date: April 8, 2021
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Osamu Yoshida, Yudai Takagi
  • Patent number: 10968989
    Abstract: An object of the present invention is to provide a chain guide, which allows easy assembling of a guide shoe to a base member, and reliably prevents detachment of the guide shoe from the base member resulting from vibration or the like during the running of a chain. Provided is a chain guide wherein a base member includes an attachment extension extending upward from a base body part beyond a support surface, and a base-side engaged part formed in the attachment extension, a guide shoe includes a flexible extension extending from a shoe body part, and a shoe-side engaging part formed in the flexible extension, and the shoe-side engaging part is hooked to the base-side engaged part from below, or diagonally from below, or from front or back, to be positioned on the far side of the base-side engaged part during engagement therebetween.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: April 6, 2021
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Masahiko Konno, Munehiro Maeda
  • Publication number: 20210079983
    Abstract: An object of the present invention is to provide a chain drive system capable of reducing sliding resistance between a chain and a guide shoe, suppressing an increase, over time, in sliding resistance, and reducing wear on the guide shoe. A chain drive system according to the present invention includes a chain having a plurality of chain plates, a plurality of sprockets on which the chain is wound, and one or more guides each including, integrally or separately, a guide shoe having a chain-running surface, and slidably guiding, in presence of lubricating oil, the chain. At least one of the plurality of chain plates has a lubricant region retaining a solid lubricant.
    Type: Application
    Filed: September 15, 2020
    Publication date: March 18, 2021
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventor: Masahiro Koyama
  • Publication number: 20210075360
    Abstract: A gear motor (motor device) comprising a three-phase motor and a terminal box housing a power supply connection terminal for connecting the three phase motor to an alternating current power supply, comprises: a power detection circuit that detects power to be supplied to the three-phase motor; a control unit that executes predetermined control if a load abnormality related to the three-phase motor or a driven device is detected based on power detected by the power detection circuit. The power detection circuit and the control unit are housed in the terminal box.
    Type: Application
    Filed: January 30, 2019
    Publication date: March 11, 2021
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Yoshiaki Yokoi, Haruki Teramukai
  • Patent number: 10900545
    Abstract: To provide a chain tensioner that enables a reduction in the number of parts to be machined, the number of assembling steps, and a reduction in the amount of oil flowing outside, without having to increase the size of the chain tensioner. An inner sleeve, which includes a check valve unit on the side of an oil pressure chamber and a pressure adjusting unit on the outer circumference thereof, is disposed inside a plunger. The inner sleeve includes a base part, a sliding cylindrical part, and a movement restricting part. The pressure adjusting unit includes an annular relief valve that is slidably fitted on the sliding cylindrical part and that makes sliding contact with an inner surface of the plunger, and a relief spring that biases the relief valve toward the movement restricting part. The sliding cylindrical part has a relief hole that communicates with the space inside.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: January 26, 2021
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Masanori Watanabe, Yuji Kurematsu
  • Publication number: 20210010570
    Abstract: An object of the present invention is to provide a tensioner that enables a sufficient amount of stroke for the plunger to be secured and allows for size and weight reductions without changing the size of the tensioner body. In the tensioner according to the invention, an oil supply path that supplies oil from outside to an oil reservoir chamber formed inside the plunger includes an oil supply space formed between an inner circumferential surface of the plunger bore and an outer circumferential surface of the plunger. The oil supply space is formed by a front-end communication groove formed on an inner circumferential surface of the plunger bore and communicating with a tensioner body oil supply hole, and a rear-end communication groove formed on an outer circumferential surface of the plunger and causing the front-end communication groove to communicate with a plunger oil supply hole.
    Type: Application
    Filed: July 1, 2020
    Publication date: January 14, 2021
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventor: Yuji Kurematsu
  • Publication number: 20200400203
    Abstract: An object of the present invention is to provide a one-way clutch capable of preventing wear on radially inner engagement surfaces and radially outer engagement surfaces of cams in periods of high-speed freewheeling. The one-way clutch includes an inner race (110) and an outer race (150), a plurality of cams (140) provided between the inner race (110) and the outer race (150), and side plates (120, 130) provided to at least one of the inner race (110) and outer race (150) and positioned on both sides in an axial direction of the cams (140). The plurality of cams (140) are each configured to receive a predetermined centrifugal force to turn in an engaging direction in which the cams engage the inner race (110) and outer race (150) when the inner race (110) and outer race (150) rotate together in the same direction.
    Type: Application
    Filed: September 1, 2020
    Publication date: December 24, 2020
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventor: Yoshihito Shimanaka
  • Patent number: 10871208
    Abstract: Provided is a tensioner with which efficiency of recirculation of oil can be improved and dependency on oil supplied from an oil pump or the like can be reduced. The tensioner includes a pressure adjustment mechanism, wherein the pressure adjustment mechanism includes a cylinder portion and a piston that is disposed in the cylinder portion so as to be capable of moving in a front-rear direction and that divides an interior space into an oil storage chamber and an adjustment space, and a liquid-tight state is maintained between the cylinder portion and the piston in all positions between a position of the piston where the piston has moved closest to the oil storage chamber side and a position of the piston where the piston has moved closest to the adjustment space side.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: December 22, 2020
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Osamu Yoshida, Masanori Watanabe, Yudai Takagi, Yuji Kurematsu
  • Patent number: 10871209
    Abstract: An object of the present invention is to provide a chain and a chain transmission device capable of reducing sliding resistance of the chain to a guide lip portion and stably maintaining an oil film between the guide lip portion and an outer plate. Provided is a chain 20 wherein a plurality of link plates 40 and 60 include outer plates 60, each of the outer plates 60 has a pair of front and rear pin holes 61 into which connecting pins 50 are inserted, a guide-side end surface 62 that faces a traveling guide surface 81a side of a chain guide 80, and a contact convex portion 63 that protrudes from an outer surface of the outer plate 60, and the contact convex portion 63 is formed in an area between the pin holes 61 and the guide-side end surface 62 in a plate height direction.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: December 22, 2020
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventor: Masahiko Konno
  • Publication number: 20200393023
    Abstract: To provide a tensioner that can keep the oil pressure in an oil pressure chamber stable and consistently generate suitable reaction force and damping force to impact loads to reduce looseness in the chain and noise. A piston is set such as to partition an inner space of a plunger into an adjustment space on the front side and the oil pressure chamber on the rear side, a piston restricting member restricting the movement of the piston toward the adjustment space. An oil relief mechanism is configured to cause the piston to move forward when oil pressure in the oil pressure chamber rises so as to discharge oil inside the oil pressure chamber to the outside. The piston restricting member has an orifice function that can control the amount of discharged oil.
    Type: Application
    Filed: May 19, 2020
    Publication date: December 17, 2020
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Yuichiro Ishikawa, Osamu Yoshida, Yuji Kurematsu, Masanori Watanabe