Patents by Inventor Mutsuhiro Nakazawa

Mutsuhiro Nakazawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11921235
    Abstract: A light reflection device includes a reflection member having a reflection surface that is formed in a planar shape. The reflection surface reflects incident light. The reflection member performs a revolution and a rotation simultaneously. A direction of the revolution of the reflection member and a direction of the rotation of the reflection member are the same. Angular velocity of the revolution of the reflection member is equal to twice angular velocity of the rotation of the reflection member.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: March 5, 2024
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventor: Mutsuhiro Nakazawa
  • Patent number: 11911845
    Abstract: A light guide device includes a first light guide part, a polygon mirror, and a second light guide part. The first part reflects and guides a laser light emitted from a laser generator. The polygon mirror rotates and includes reflective parts. The reflective parts are arranged to form a regular polygonal reflective surface when viewed in a rotation axis direction, the polygon mirror reflecting the light guided by the first part by the reflective part while rotating. The second part reflects the light reflected at the reflective part and guides the light so that the light is irradiated to the workpiece at each of the reflective parts. The reflective part reflects the incident light so that the optical axis of the incident light offset in the rotation axis direction. At least two reflective parts differ from each other in position in the rotation axis direction.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: February 27, 2024
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventor: Mutsuhiro Nakazawa
  • Publication number: 20220187594
    Abstract: A polygon mirror rotates around a rotational axis. First and second reflection surfaces are placed on at least two of a plurality of sides of the polygon mirror, respectively. The first surface is formed in a planar shape inclined to a plane perpendicular to the rotational axis. The second surface is formed in a planar shape inclined with respect to a plane perpendicular to the rotational axis. Light which enters into the mirror is reflected by the first surface and then by the second surface. Among the sides, at least one of a direction in which the first surface is inclined with respect to a plane perpendicular to the rotational axis and a distance in the direction of the rotational axis between the first and second reflection surfaces is different.
    Type: Application
    Filed: February 6, 2020
    Publication date: June 16, 2022
    Inventors: Mutsuhiro NAKAZAWA, Osami OOGUSHI
  • Publication number: 20220179199
    Abstract: A light guide device includes a plurality of reflection units that reflect incident light so as to guide it to irradiate on an object. The plurality of the reflection units are lined up along a traveling direction of the incident light. Each of the plurality of the reflection units includes a first light guide member that reflects the incident light. Each of the plurality of the reflection units is switched between a reflecting state in which the first light guide member reflects the incident light and a passing state in which the incident light passes through, by rotation of the first light guide member. Timing of being in the reflecting state differs among the plurality of the reflection units. In the reflecting state, the reflected light due to reflection of the incident light is deflected as the first light guide member rotates. The reflected light is led to an irradiated point included in a scanning area in which the reflection unit scans the object to be irradiated.
    Type: Application
    Filed: March 4, 2020
    Publication date: June 9, 2022
    Inventor: Mutsuhiro NAKAZAWA
  • Publication number: 20220155423
    Abstract: A light reflection device comprises a reflection member having a reflection surface that is formed in a planar shape. The reflection surface reflects incident light. The reflection member performs a revolution and a rotation simultaneously. A direction of the revolution of the reflection member and a direction of the rotation of the reflection member are the same. Angular velocity of the revolution of the reflection member is equal to twice angular velocity of the rotation of the reflection member.
    Type: Application
    Filed: March 31, 2020
    Publication date: May 19, 2022
    Inventor: Mutsuhiro NAKAZAWA
  • Publication number: 20210316395
    Abstract: A laser scanner includes a rotary member, light-transmitting glasses, and a mirror. The rotary member rotates about a rotation axis. The light-transmitting glasses are disposed on the rotary member. The mirror guides a laser beam such that the laser beam is incident on the light-transmitting glass. When the rotary member is viewed in a direction parallel to the rotation axis, a polygon is formed by connecting inner surfaces of the light-transmitting glasses. Given that the angle formed between the inner surface of each light-transmitting glass and a straight line parallel to the rotation axis is defined as an inclination angle, the inclination angles of at least two of the light-transmitting glasses have different values.
    Type: Application
    Filed: August 30, 2019
    Publication date: October 14, 2021
    Inventor: Mutsuhiro NAKAZAWA
  • Publication number: 20210260695
    Abstract: The light guide device includes a first light guide part, a polygon mirror, and a second light guide part. The first light guide part reflects and guides the laser light emitted from the laser generator. The polygon mirror is configured to be rotatable and includes a plurality of reflective parts (33), the reflective parts (33) being arranged to form a regular polygonal reflective surface when viewed in a rotation axis direction, the polygon mirror reflecting the laser light guided by the first light guide part by the reflective part while rotating. The second light guide part reflects the laser light reflected at the reflective part (33) of the polygon mirror and guides the laser light so that the laser light is irradiated to the workpiece at each of the reflective parts (33). The reflective part (33) of the polygon mirror is configured to reflect the incident laser light so that the optical axis of the incident light offset in the rotation axis direction.
    Type: Application
    Filed: June 19, 2019
    Publication date: August 26, 2021
    Inventor: Mutsuhiro NAKAZAWA
  • Publication number: 20210260692
    Abstract: The light guide device includes a first light guide part, a polygon mirror, a second light guide part, and an adjustment part. The first light guide part reflects and guides the laser light emitted from the laser generator. The polygon mirror has a reflective part (33), and the reflective part (33) reflects the laser light guided by the first light guide part while the reflective part (33) rotates. The second light guide part reflects the laser light reflected at the reflective part (33) of the polygon mirror and directs the light so that the laser light is illuminated to the workpiece at each reflective part (33), respectively. The adjustment part adjusts the position of the light incident on the polygon mirror in the rotation axis direction of the optical axis, thereby changing the positions of light incident on the irradiation target in the line width direction. The irradiation target is irradiated with the light while the position of the light in a line width direction.
    Type: Application
    Filed: June 19, 2019
    Publication date: August 26, 2021
    Inventors: Mutsuhiro NAKAZAWA, Osami OOGUSHI
  • Patent number: 10131564
    Abstract: A glass plate separating apparatus, as one example, includes: a trigger device that forms a start point flaw in a first main surface of a glass ribbon on a division-planned line; a pair of holding members disposed at the first main surface side of the glass ribbon; and a heater disposed at a second main surface side of the glass ribbon. The pair of holding members, each of which extends parallel to the division-planned line, is brought into contact with the glass ribbon at both sides of the division-planned line while being lowered together with the glass ribbon. The heater extends along the division-planned line, and is brought into contact with and pressed onto the glass ribbon on the division-planned line while being lowered together with the glass ribbon.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: November 20, 2018
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Mutsuhiro Nakazawa, Takanori Kiritoshi, Osami Oogushi, Keiji Tsujita, Tadaoki Yabuuchi
  • Patent number: 9604309
    Abstract: An optical scanning device includes: a light projector configured to radiate light while causing the light to make angular movement at a constant speed; and a light reflector configured to reflect the light radiated from the light projector to guide the light to an intended irradiated point on a predetermined scanning line. The light reflector includes a plurality of reflecting portions and reflects, at least twice, the light radiated from the light projector to guide the light to the intended irradiated point. The reflecting portions each include a plurality of reflecting surfaces. A length of an optical path from the light projector to the irradiated point is substantially constant for all of irradiated points on the scanning line, and a scanning speed, on the scanning line, of the light radiated from the light projector is substantially constant.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: March 28, 2017
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Morimasa Kuge, Hideyuki Tanaka, Mutsuhiro Nakazawa, Kazunori Takahara, Osami Oogushi
  • Publication number: 20170057863
    Abstract: A glass plate separating apparatus, as one example, includes: a trigger device that forms a start point flaw in a first main surface of a glass ribbon on a division-planned line; a pair of holding members disposed at the first main surface side of the glass ribbon; and a heater disposed at a second main surface side of the glass ribbon. The pair of holding members, each of which extends parallel to the division-planned line, is brought into contact with the glass ribbon at both sides of the division-planned line while being lowered together with the glass ribbon. The heater extends along the division-planned line, and is brought into contact with and pressed onto the glass ribbon on the division-planned line while being lowered together with the glass ribbon.
    Type: Application
    Filed: June 2, 2015
    Publication date: March 2, 2017
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Mutsuhiro NAKAZAWA, Takanori KIRITOSHI, Osami OOGUSHI, Keiji TSUJITA, Tadaoki YABUUCHI
  • Patent number: 9529190
    Abstract: An optical scanning device includes: a projector configured to radiate laser light incident thereon while causing the laser light to make angular movement around a projection center, and a reflector with a parabolic surface, the reflector being configured to reflect the laser light from the projector. The projection center is positioned at a focal point of the parabolic surface. The projector radiates the laser light such that the greater a difference between a rotation angle of the laser light and a reference angle, the lower an angular speed of the laser light, the reference angle being the rotation angle of the laser light when the laser light reflects on a vertex of the parabolic surface. A laser machining device includes the optical scanning device, and is configured to cause the laser light from the reflector to fall on a workpiece to form a machining line.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: December 27, 2016
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Mutsuhiro Nakazawa, Kazunori Takahara, Osami Oogushi
  • Patent number: 9527160
    Abstract: A beam head unit including beam heads configured to scan a single laser beam on a thin-film layer of a workpiece from an irradiation start side toward an irradiation end side in a direction crossing a feeding direction of the workpiece while the workpiece is fed by a constant-speed feeder; laser oscillator configured to emit the laser beam to irradiate each beam head; a controller configured to control scanning speed of the laser beam emitted from each beam head and feeding speed of the workpiece to control a machining line formed in the workpiece fed at the predetermined feeding speed. The controller is configured to switch a beam head to use to form the machining line between the beam heads to form the machining line alternately. This configuration makes it possible to form machining lines highly efficiently in the thin-film layer of the workpiece while feeding the workpiece.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: December 27, 2016
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Mutsuhiro Nakazawa, Kazunori Takahara, Osami Oogushi
  • Patent number: 9475651
    Abstract: A holding device to hold a side portion of a conveyed workpiece; a running device to convey the holding device in a feeding direction along a rail; and a support mechanism to support the holding device at front portion and rear portions of the mechanism. Eccentric shafts are with the holding device at respective positions, at one position, one of front and rear portions is eccentric in the feeding direction by a predetermined amount relative to one drive shaft's axis included in the running device. At the other position, one of front and rear portions is eccentric crossing the workpiece feeding direction by a predetermined amount relative to one drive shaft's axis in the running device. The yawing occurring while the workpiece is conveyed, is corrected by rotating the axes of eccentric shafts axes such the holding device moves relative to the running device's position.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: October 25, 2016
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Morimasa Kuge, Hideyuki Tanaka, Osami Oogushi, Kentaro Azuma, Mutsuhiro Nakazawa, Kazunori Takahara
  • Publication number: 20160151929
    Abstract: A method of dividing a plate member made of a brittle material includes; first, forming a minute start point flaw 16 in a first main surface of a plate member on a division-planned line; then holding the first main surface of the plate member on a pair of lines; and thereafter, for example, bringing a dividing member, which heats up a second main surface of the plate member by contact heating, into contact with the second main surface of the plate member to generate a tensile thermal stress on the first main surface and applying bending force in a thickness direction of the plate member to the second main surface of the plate member, such that a tensile stress derived from the bending force and the tensile thermal stress are combined together. In this manner, the plate member is divided along the division-planned line.
    Type: Application
    Filed: May 22, 2014
    Publication date: June 2, 2016
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Osami OGUSHI, Takanori KIRITOSHI, Mutsuhiro NAKAZAWA, Keiji TSUJITA
  • Publication number: 20150217403
    Abstract: A beam head unit including beam heads configured to scan a single laser beam on a thin-film layer of a workpiece from an irradiation start side toward an irradiation end side in a direction crossing a feeding direction of the workpiece while the workpiece is fed by a constant-speed feeder; laser oscillator configured to emit the laser beam to irradiate each beam head; a controller configured to control scanning speed of the laser beam emitted from each beam head and feeding speed of the workpiece to control a machining line formed in the workpiece fed at the predetermined feeding speed. The controller is configured to switch a beam head to use to form the machining line between the beam heads to form the machining line alternately. This configuration makes it possible to form machining lines highly efficiently in the thin-film layer of the workpiece while feeding the workpiece.
    Type: Application
    Filed: March 25, 2013
    Publication date: August 6, 2015
    Inventors: Mutsuhiro Nakazawa, Kazunori Takahara, Osami Oogushi
  • Publication number: 20150069027
    Abstract: An optical scanning device includes: a projector configured to radiate laser light incident thereon while causing the laser light to make angular movement around a projection center, and a reflector with a parabolic surface, the reflector being configured to reflect the laser light from the projector. The projection center is positioned at a focal point of the parabolic surface. The projector radiates the laser light such that the greater a difference between a rotation angle of the laser light and a reference angle, the lower an angular speed of the laser light, the reference angle being the rotation angle of the laser light when the laser light reflects on a vertex of the parabolic surface. A laser machining device includes the optical scanning device, and is configured to cause the laser light from the reflector to fall on a workpiece to form a machining line.
    Type: Application
    Filed: March 25, 2013
    Publication date: March 12, 2015
    Inventors: Mutsuhiro Nakazawa, Kazunori Takahara, Osami Oogushi
  • Publication number: 20140339740
    Abstract: A holding device to hold a side portion of a conveyed workpiece; a running device to convey the holding device in a feeding direction along a rail; and a support mechanism to support the holding device at front portion and rear portions of the mechanism. Eccentric shafts are with the holding device at respective positions, at one position, one of front and rear portions is eccentric in the feeding direction by a predetermined amount relative to one drive shaft's axis included in the running device. At the other position, one of front and rear portions is eccentric crossing the workpiece feeding direction by a predetermined amount relative to one drive shaft's axis in the running device. The yawing occurring while the workpiece is conveyed, is corrected by rotating the axes of eccentric shafts axes such the holding device moves relative to the running device's position.
    Type: Application
    Filed: November 19, 2012
    Publication date: November 20, 2014
    Applicant: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Morimasa Kuge, Hideyuki Tanaka, Osami Oogushi, Kentaro Azuma, Mutsuhiro Nakazawa, Kazunori Takahara
  • Publication number: 20140036331
    Abstract: An optical scanning device includes: a light projector configured to radiate light while causing the light to make angular movement at a constant speed; and a light reflector configured to reflect the light radiated from the light projector to guide the light to an intended irradiated point on a predetermined scanning line. The light reflector includes a plurality of reflecting portions and reflects, at least twice, the light radiated from the light projector to guide the light to the intended irradiated point. The reflecting portions each include a plurality of reflecting surfaces. A length of an optical path from the light projector to the irradiated point is substantially constant for all of irradiated points on the scanning line, and a scanning speed, on the scanning line, of the light radiated from the light projector is substantially constant.
    Type: Application
    Filed: March 8, 2012
    Publication date: February 6, 2014
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Morimasa Kuge, Hideyuki Tanaka, Mutsuhiro Nakazawa, Kazunori Takahara, Osami Oogushi