Patents by Inventor Nobuyasu Nagafuku
Nobuyasu Nagafuku 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).
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Patent number: 6904672Abstract: This invention provides an electronic component mounting method capable of effectively utilizing a self-alignment effect even if a mounting interval of electronic components is small. This method includes the steps of detecting a printing position of a solder paste on the circuit board and mounting an electronic component. When a solder paste on a circuit board having a land formed thereon is printed and an electronic component is mounted, the printing position of the solder paste of the circuit board is detected by a printing position detecting device included in an inspecting apparatus. Then, the electronic component is mounted by using the detected printing position of the solder paste as a reference by an electronic component mounting apparatus.Type: GrantFiled: March 5, 2002Date of Patent: June 14, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Nobuyasu Nagafuku, Noboru Nishikawa, Takeshi Kuribayashi
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Publication number: 20050077340Abstract: This invention provides an electronic component mounting method capable of effectively utilizing a self-alignment effect even if a mounting interval of electronic components is small. This method includes the steps of detecting a printing position of a solder paste on the circuit board and mounting an electronic component. This invention further provides apparatus, devices, and system using the method. When a solder paste on a circuit board having a land formed thereon is printed and an electronic component is mounted, the printing position of the solder paste of the circuit board is detected by a printing position detecting device included in an inspecting apparatus. Then, the electronic component is mounted by using the detected printing position of the solder paste as a reference by an electronic component mounting apparatus.Type: ApplicationFiled: September 29, 2004Publication date: April 14, 2005Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Nobuyasu Nagafuku, Noboru Nishikawa, Takeshi Kuribayashi
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Patent number: 6774931Abstract: An algorithm for determining the movement of camera for automatic tracing of inspection positions is preset based on the characteristic shape of the component. A start point and an end point of inspection of lands are designated to the camera, and the camera moves from the start point to the end point automatically along a predetermined path in accordance with the preset algorithm, thereby performing inspection of lands in succession.Type: GrantFiled: April 18, 2000Date of Patent: August 10, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akihiko Wachi, Masaya Matsumoto, Nobuyasu Nagafuku
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Patent number: 6694875Abstract: A screen printing method and apparatus for printing a circuit pattern corresponding to that of a stencil (4), onto a print-object article (1) placed on an ascendable/descendable positioning stage (2), through moving a squeegee (5a, 5b) horizontally while the squeegee is pushed in on the stencil so that print paste (9) is printed to the article via the stencil. The squeegee is lifted to an extent of a push-in stroke, to which the squeegee has been pushed in on the stencil, and thereafter the article is separated away from the stencil by moving the stage downward. The board is classified into first and second areas (121, 120) where values of opening sizes of the stencil along a squeegee moving direction are smaller than and not smaller than a threshold, and a speed of the squeegee at the first area is made slower than that at the second area.Type: GrantFiled: April 11, 2001Date of Patent: February 24, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Ken Takahashi, Naoichi Chikahisa, Yousuke Nagasawa, Takao Naito, Akihiko Wachi, Seishiro Yanachi, Nobuyasu Nagafuku, Nobuyuki Kakishima
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Patent number: 6659005Abstract: A screen printing method and apparatus for printing a circuit pattern corresponding to that of a stencil (4), onto a print-object article (1) placed on an ascendable/descendable positioning stage (2), through moving a squeegee (5a, 5b) horizontally while the squeegee is pushed in on the stencil so that print paste (9) is printed to the article via the stencil. The squeegee is lifted to an extent of a push-in stroke, to which the squeegee has been pushed in on the stencil, and thereafter the article is separated away from the stencil by moving the stage downward. The board is classified into first and second areas (121, 120) where values of opening sizes of the stencil along a squeegee moving direction are smaller than and not smaller than a threshold, and a speed of the squeegee at the first area is made slower than that at the second area.Type: GrantFiled: July 22, 2002Date of Patent: December 9, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Ken Takahashi, Naoichi Chikahisa, Yousuke Nagasawa, Takao Naito, Akihiko Wachi, Seishiro Yanachi, Nobuyasu Nagafuku, Nobuyuki Kakishima
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Patent number: 6600137Abstract: The quantity of supply heat of heated gas is controlled so that a supply heat quantity of the heated gas when no heat treatment of solder or the like is needed is made smaller than a supply heat quantity of the heated gas when heat treatment of solder or the like is needed, reducing consumption power when no heat treatment is needed for a board.Type: GrantFiled: April 13, 2001Date of Patent: July 29, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masaru Nonomura, Toshihiro Abe, Nobuyasu Nagafuku, Kuniyo Matsumoto, Takashi Sasaki
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Patent number: 6561407Abstract: The present invention provides an apparatus and a method for operating reflow soldering in a mounting field whereby an abnormality in transfer of circuit boards can be detected with high reliability. Whether or not a circuit board is transferred by a transfer conveyor is judged. A discharge conveyor is started when a control device judges occurrence of transfer abnormality. After the discharge conveyor starts, the transfer abnormality is determined to be a drop of the circuit board if a discharge completion detector detects that a dropped circuit board is discharged. And then the control device continues the reflow soldering. The transfer abnormality in the reflow soldering apparatus can be detected with high reliability because it can be detected whether the transfer abnormality is either the drop or a clog of the circuit board.Type: GrantFiled: January 25, 2002Date of Patent: May 13, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Nobuyasu Nagafuku, Akihiko Wachi, Masaya Matsumoto, Toshiyuki Koyama
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Publication number: 20020178943Abstract: A screen printing method and apparatus for printing a circuit pattern corresponding to that of a stencil (4), onto a print-object article (1) placed on an ascendable/descendable positioning stage (2), through moving a squeegee (5a, 5b) horizontally while the squeegee is pushed in on the stencil so that print paste (9) is printed to the article via the stencil. The squeegee is lifted to an extent of a push-in stroke, to which the squeegee has been pushed in on the stencil, and thereafter the article is separated away from the stencil by moving the stage downward. The board is classified into first and second areas (121, 120) where values of opening sizes of the stencil along a squeegee moving direction are smaller than and not smaller than a threshold, and a speed of the squeegee at the first area is made slower than that at the second area.Type: ApplicationFiled: July 22, 2002Publication date: December 5, 2002Inventors: Ken Takahashi, Naoichi Chikahisa, Yousuke Nagasawa, Takao Naito, Akihiko Wachi, Seishiro Yanachi, Nobuyasu Nagafuku, Nobuyuki Kakishima
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Publication number: 20020157488Abstract: This invention provides an electronic component mounting method capable of effectively utilizing a self-alignment effect even if a mounting interval of electronic components is small. This method includes the steps of detecting a printing position of a solder paste on the circuit board and mounting an electronic component. This invention further provides apparatus, devices, and system using the method. When a solder paste on a circuit board having a land formed thereon is printed and an electronic component is mounted, the printing position of the solder paste of the circuit board is detected by a printing position detecting device included in an inspecting apparatus. Then, the electronic component is mounted by using the detected printing position of the solder paste as a reference by an electronic component mounting apparatus.Type: ApplicationFiled: March 5, 2002Publication date: October 31, 2002Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Nobuyasu Nagafuku, Noboru Nishikawa, Takeshi Kuribayashi
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Publication number: 20020060235Abstract: The present invention provides an apparatus and a method for operating reflow soldering in a mounting field whereby an abnormality in transfer of circuit boards can be detected with high reliability. Whether or not a circuit board is transferred by a transfer conveyor is judged. A discharge conveyor is started when a control device judges occurrence of transfer abnormality. After the discharge conveyor starts, the transfer abnormality is determined to be a drop of the circuit board if a discharge completion detector detects that a dropped circuit board is discharged. And then the control device continues the reflow soldering. The transfer abnormality in the reflow soldering apparatus can be detected with high reliability because it can be detected whether the transfer abnormality is either the drop or a clog of the circuit board.Type: ApplicationFiled: January 25, 2002Publication date: May 23, 2002Inventors: Nobuyasu Nagafuku, Akihiko Wachi, Masaya Matsumoto, Toshiyuki Koyama
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Patent number: 6382497Abstract: The present invention provides an apparatus and a method for operating reflow soldering in a mounting field whereby an abnormality in transfer of circuit boards can be detected with high reliability. Whether or not a circuit board is transferred by a transfer conveyor is judged. A discharge conveyor is started when a control device judges occurrence of transfer abnormality. After the discharge conveyor starts, the transfer abnormality is determined to be a drop of the circuit board if a discharge completion detector detects that a dropped circuit board is discharged. And then the control device continues the reflow soldering. The transfer abnormality in the reflow soldering apparatus can be detected with high reliability because it can be detected whether the transfer abnormality is either the drop or a clog of the circuit board.Type: GrantFiled: September 28, 2000Date of Patent: May 7, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Nobuyasu Nagafuku, Akihiko Wachi, Masaya Matsumoto, Toshiyuki Koyama
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Publication number: 20010017086Abstract: A screen printing method and apparatus for printing a circuit pattern corresponding to that of a stencil (4), onto a print-object article (1) placed on an ascendable/descendable positioning stage (2), through moving a squeegee (5a, 5b) horizontally while the squeegee is pushed in on the stencil so that print paste (9) is printed to the article via the stencil. The squeegee is lifted to an extent of a push-in stroke, to which the squeegee has been pushed in on the stencil, and thereafter the article is separated away from the stencil by moving the stage downward. The board is classified into first and second areas (121, 120) where values of opening sizes of the stencil along a squeegee moving direction are smaller than and not smaller than a threshold, and a speed of the squeegee at the first area is made slower than that at the second area.Type: ApplicationFiled: April 11, 2001Publication date: August 30, 2001Inventors: Ken Takahashi, Naoichi Chikahisa, Yousuke Nagasawa, Takao Naito, Akihiko Wachi, Seishiro Yanachi, Nobuyasu Nagafuku, Nobuyuki Kakishima
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Patent number: 6237490Abstract: A screen printing method and apparatus for printing a circuit pattern corresponding to that of a stencil (4), onto a print-object article (1) placed on an ascendable/descendable positioning stage (2), through moving a squeegee (5a,5b) horizontally while the squeegee is pushed in on the stencil so that print paste (9) is printed to the article via the stencil. The squeegee is lifted to an extent of a push-in stroke, to which the squeegee has been pushed in on the stencil, and thereafter the article is separated away from the stencil by moving the stage downward. The board is classified into first and second areas (121,120) where values of opening sizes of the stencil along a squeegee moving direction are smaller than and not smaller than a threshold, and a speed of the squeegee at the first area is made slower than that at the second area.Type: GrantFiled: February 20, 1998Date of Patent: May 29, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Ken Takahashi, Naoichi Chikahisa, Yousuke Nagasawa, Takao Naito, Akihiko Wachi, Seishiro Yanachi, Nobuyasu Nagafuku, Nobuyuki Kakishima