Patents Assigned to Tsubakimoto Chain Co.
  • Patent number: 10718407
    Abstract: A chain bending limiting attachment includes first bending limiting members and second bending limiting members. The first and second bending limiting members are detachably attached to a chain to be arranged in a series arrangement direction. Each first bending limiting member includes a first engaging portion. When the chain bends in a first direction, the first engaging portion engages with another first bending limiting member adjacent to the first bending limiting member in the series arrangement direction to limit bending of the chain in the first direction. Each second bending limiting member includes a second engaging portion. When the chain bends in a second direction, the second engaging portion engages with another second bending limiting member adjacent to the second bending limiting member in the series direction to limit bending of the chain in the second direction.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: July 21, 2020
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Takayuki Tetsuka, Tamaki Shiki, Yasunori Ueno, Masashi Kunii
  • Patent number: 10710837
    Abstract: The guide apparatus for a long object comprises: a movable portion that is capable of reciprocal movement in a reciprocal direction; a fixed portion; a pair of sheets that have flexibility; and a guide member. The fixed portion is fixed so that the movement in the reciprocal direction is not possible. The pair of sheets, with a curved part formed at an intermediate position in the longitudinal direction, couple the movable portion and the fixed portion. The guide member reciprocates in the reciprocal direction while guiding the movable portion and the pair of sheets so that the pair of sheets reciprocate in the reciprocal direction as the curved part is shifted in accordance with the reciprocal movement of the movable portion. The guide member forms, together with the pair of sheets, a storage chamber for storing a long object.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: July 14, 2020
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventor: Takayuki Tetsuka
  • Patent number: 10683913
    Abstract: Provided is a tensioner which can ensure, with a simple structure, both the stability of the installation state of a check valve and the capacity of an oil storage chamber. A tensioner has a plunger, a housing, a check valve, and a coil spring. The plunger has a front-side plunger part having a pressing front end portion, and a rear-side plunger part disposed on the rear side of the front-side plunger part and having a valve movement restricting portion. The check valve is disposed on the rear side of the valve movement restricting portion. The coil spring is disposed so that one end thereof is in contact with a housing bottom portion and the other end thereof is in contact with the rear side of the check valve.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: June 16, 2020
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Munehiro Maeda, Yuji Kurematsu, Osamu Yoshida, Yudai Takagi
  • Patent number: 10670118
    Abstract: A tensioner with a simple structure is provided, which is capable of keeping oil pressure in a first high oil-pressure chamber stable and holding a chain favorably. The tensioner includes a plunger, a housing, a check valve, an inner sleeve, and a biasing member. In the housing, a second high oil-pressure chamber and a unit setting part are formed. In the unit setting part, a relief valve unit is set. A gap between an inner circumferential surface of a plunger hole and an outer circumferential surface of the inner sleeve functions as part of an oil flow passage that connects the first high oil-pressure chamber and the second high oil-pressure chamber.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: June 2, 2020
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Yohei Nakata, Yuji Kurematsu, Toshitaka Ogo
  • Publication number: 20200166105
    Abstract: To provide a simple-structured chain drive mechanism that can reduce the noise generated when the chain sits on the sprocket, prevent deterioration of power transmission efficiency, and retard the progress of wear on the sprocket or chain. The chain drive mechanism includes a sprocket having a plurality of teeth, and a chain having a plurality of link plates and configured to be put around the sprocket. The sprocket includes a pair of flanges protruding circumferentially around the sprocket such as to sandwich the plurality of teeth from sides. The chain includes a pair of seat portions on both sides of the chain so that the flanges abut on the seat portions from a circumferential direction of the sprocket when the chain sits.
    Type: Application
    Filed: October 24, 2019
    Publication date: May 28, 2020
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Takahiro Kadono, Yuji Kurematsu
  • Patent number: 10661988
    Abstract: A low temperature storage system, a transport mechanism, and a low temperature storage vessel are provided, which enable downsizing and simplification of the transport mechanism, as well as stable transport of stored objects. A low temperature storage system (1) includes a low temperature storage vessel (10) and a transport mechanism (20). The transport mechanism (20) includes a reciprocating part (30) that has a holding part (35) and that is capable of reciprocating along a transfer direction, and guide unit (40). The guide unit (40) include an in-vessel guide (50) fixedly placed inside the low temperature storage vessel (10), and a telescopic guide (60) configured to be able to extend and contract along the transfer direction. The telescopic guide (60) is provided independently of the in-vessel guide (50) so as to be connectable to the in-vessel guide (50).
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: May 26, 2020
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Masahiro Asukai, Tomokatsu Takahashi
  • Publication number: 20200158223
    Abstract: To provide a sprocket that reduces the influence of tension fluctuations concurrent with load torque variations to suppress noise and vibration, and that prevents an increase in tension fluctuations, noise, and vibration even when the chain tension is low and the load torque is small, and in regions where engagement between the chain and sprocket is free of the influence of tension. The sprocket has a plurality of seating points for the chain when the chain sits under no load set between adjacent pairs of the teeth such that their radial positions change in a circumferentially continuous manner. The radial positions of the seating points under no load have a variation pattern in which the radial positions increase and decrease depending on circumferential positions of the seating points.
    Type: Application
    Filed: October 23, 2019
    Publication date: May 21, 2020
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Yuji Kurematsu, Yudai Takagi, Yuki Mizuno
  • Publication number: 20200149614
    Abstract: An object of the present invention is to provide a tensioner that has a reduced number of components and weight, and is easy to assemble. The tensioner has a base member loosely fitted into an open rear end of a cylindrical plunger with a closed front end against the resiliency of a biasing means accommodated inside the plunger. The tensioner includes a plunger stopper mechanism configured such that an engaging part formed on the base member detachably engages an engaging groove provided on an inner circumferential surface of the plunger directly or via another member.
    Type: Application
    Filed: October 17, 2019
    Publication date: May 14, 2020
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Taichi Okada, Masanori Watanabe
  • Publication number: 20200130942
    Abstract: An elongated object guiding device includes an elongated protection guide portion, inner wheels, outer wheels, a first rail surface, a second rail surface, at least one divided portion, and a restriction guide. The outer wheels are located at positions different from those of the inner wheels in the longitudinal direction of the protection guide portion and located farther from the protection guide portion in the width direction than the inner wheels. The divided portion is configured by dividing the first rail surface and the second rail surface. The divided portion allows the inner wheels and the outer wheels to move along a curved portion. The restriction guide limits a range in which at least the inner wheels or the outer wheels moves away from the first rail surface and the second rail surface.
    Type: Application
    Filed: April 20, 2018
    Publication date: April 30, 2020
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventor: Takayuki Tetsuka
  • Patent number: 10634223
    Abstract: An object of the present invention is to provide a simple-structured tensioner capable of consistently exhibiting the check valve function irrespective of the form of oil supply passages. The tensioner includes a plunger, a housing, a biasing unit, an oil supply passage, and a check valve. The check valve includes a plurality of valve members and a ball seat member. The ball seat member includes a plurality of oil passages and a plurality of seat parts. The check valve further includes a passage forming member having an oil inlet disposed between the plurality of oil passages and the oil supply passage.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: April 28, 2020
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventor: Masanori Watanabe
  • Patent number: 10634238
    Abstract: An object of the present invention is to provide a chain drive system that can reduce sliding resistance between a chain and a guide shoe, minimize increase of sliding resistance over time, and reduce production cost. Provided is a chain drive system 100 including a plurality of sprockets 101 and 102 over which a chain 130 passes over, and one or more guides 110 and 120 that guide the chain 130. The guides 110 and 120 include integral or separate guide shoes 111 and 121 each having a chain running surface. The chain running surfaces include, in part thereof, a lubricated area 114 where a solid lubricant P is held.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: April 28, 2020
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Masahiko Konno, Kaori Mori, Ryo Segawa
  • Publication number: 20200116238
    Abstract: An object of the present invention is to provide a chain tensioner that can prevent breakage or deformation of its components during transport or storage, prevent wrong assembly, and increase the degree of design freedom. The chain tensioner includes a guide lever supported pivotably on an arm part that is provided to a tensioner body. The tensioner body has a body-side fixing pin hole positioned for a stopper pin to pass through without extending through the plunger. The guide lever has a lever-side fixing pin hole that comes to be coaxial with the body-side fixing pin hole in a predetermined pivoting position.
    Type: Application
    Filed: October 11, 2019
    Publication date: April 16, 2020
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Masahiko Konno, Koichi Shimosaka
  • Publication number: 20200116240
    Abstract: An object of the present invention is to provide a chain guide that eliminates the burden of assembling a guide shoe and a base member together, and prevents the guide shoe from being limited in its movement in the longitudinal guiding direction relative to the base member to improve durability. The guide shoe and the base member of the chain guide according to the invention are united by being integrally molded. The chain guide includes a fixed engaging part where the guide shoe engages with the base member such that the guide shoe is restricted from moving in the longitudinal guiding direction relative to the base member, and a movable engaging part where the guide shoe engages with the base member such that the guide shoe is slidable relative to the base member. A molding gate mark is positioned at or near the fixed engaging part.
    Type: Application
    Filed: October 9, 2019
    Publication date: April 16, 2020
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Yoshitaka Iwasaki, Kaori Mori, Yuji Kurematsu
  • Patent number: 10619722
    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 the side of a traveling guide surface 81a of a chain guide 80, and a concave portion 63 that is formed in an outer surface of the outer plate 60, and the concave 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 24, 2018
    Date of Patent: April 14, 2020
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventor: Masahiko Konno
  • Patent number: 10612630
    Abstract: A guide shoe is provided, which exhibits a lower level of slide resistance between a chain and a slide surface at the time of the sliding of the chain, is able to keep a sufficient lubricant on the slide surface even at the time of the starting of an engine, and produces less noise and wear. The guide shoe includes: a slide surface that slidably guides a link plate of a traveling chain; and a plurality of guide protrusions provided on the slide surface, the guide protrusions protruding in a vertical direction from the slide surface, wherein each of front surfaces of the guide protrusions is formed to have a convex curved surface at least from a part thereof on an upstream side to a top part thereof in a chain traveling direction.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: April 7, 2020
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Masahiko Konno, Kozo Inoue
  • Publication number: 20200101517
    Abstract: To provide a rotating member that allows formation of protrusions to be dug into an opposite surface with a simple configuration, and that can prevent a direction-dependent reduction of anti-slip effect and provide sufficient slip prevention in the direction of torque as well as in the radial direction, and a method of forming this rotating member. The rotating member has a boss and an anti-slip surface on at least one of both axial end faces of the boss. The anti-slip surface includes a plurality of crater-like depressions each having a peripheral protrusion. At least some of the plurality of crater-like depressions are arranged serially to form a plurality of crater chains.
    Type: Application
    Filed: July 9, 2019
    Publication date: April 2, 2020
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Yudai Takagi, Yuji Kurematsu
  • Publication number: 20200096087
    Abstract: An object of the present invention is to provide a sprocket that reduces impact and knocking sound of contact or seating when meshing with a chain, and that improves the durability of an entire chain drive system by reducing vibration and noise. The sprocket includes a cushion ring having an outer circumferential surface that is configured to come into contact with link plates of the chain. The cushion ring includes a circumferential groove extending in a circumferential direction on the outer circumferential surface, and the circumferential groove has a width smaller than that of the link plates.
    Type: Application
    Filed: September 11, 2019
    Publication date: March 26, 2020
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Masahiko Konno, Shoichiro Shimizu
  • Publication number: 20200063849
    Abstract: In a sprocket including a cushion ring coming into contact with link plates of a chain, the cushion ring includes, on an outer circumferential surface, a plurality of convex sections coming into contact with the link plates, and the plurality of convex sections are provided at corresponding positions to tooth tips at identical pitches to a plurality of teeth and include convex sections having different shapes.
    Type: Application
    Filed: July 2, 2019
    Publication date: February 27, 2020
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Kaori Mori, Yuji Kurematsu
  • Patent number: 10544855
    Abstract: Provided is a chain guide that enables a reduction in size with a simple structure, without lowering the strength of the chain guide. The base member 30 includes a side wall rib 32 or 33 extending upward higher than a shoe support surface 31 at at least one of both side edges 31a and 31b in a guide width direction. The guide shoe 20 includes, at at least one of both side edges 20a and 20b in the guide width direction, an upstream lip 22, a downstream lip 23, and a shoe widthwise recess 24 formed between the upstream lip 22 and the downstream lip 23 by inwardly recessing the side edge 20a or 20b of the guide shoe 20 in the guide width direction. The side wall rib 32 or 33 is located inside the shoe widthwise recess 24.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: January 28, 2020
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventor: Toshitaka Ogo
  • Patent number: 10533655
    Abstract: A one-way clutch includes one or more annular members and one or more annular elastic bodies. The annular member is attached to a side plate of an outer race in the axial outer side of a seal member and includes a facing surface that faces an outer circumferential surface of an inner race with a gap and a recess formed in the facing surface. The annular elastic body is fitted into the outer circumferential surface of the inner surface corresponding to the recess so as to be in close contact therewith.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: January 14, 2020
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventor: Takayuki Nishi