Patents by Inventor Yukio Wakasa
Yukio Wakasa 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: 7439454Abstract: A transport apparatus that enables a trough to be easily removed in one step, and a combination weighing apparatus provided with the same are provided. The transport apparatus includes a trough and a reciprocating movement mechanism, and is configured to convey an article placed in the trough in a predetermined direction. The reciprocating movement mechanism includes a motor box, and a support member. The trough has one of a protruding part and a depressed part, while the support member had the other of the protruding part and the depressed part. The motor is configured to move the trough via the support member along the conveyance direction such that the trough moves faster in a direction opposite the conveyance direction than in the conveyance direction. The protruding part is removably connected to the depressed part.Type: GrantFiled: March 11, 2005Date of Patent: October 21, 2008Assignee: Ishida Co., Ltd.Inventors: Toshiyuki Komatsu, Yukio Wakasa
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Patent number: 7390981Abstract: A weighing device includes a supply unit, a weighing unit, a stock unit, a discharge unit, a transfer unit, and a revolving mechanism. The supply unit supplies a target object to a container revolving in the weighing unit. The weighing unit weighs the container while revolving the same. The stock unit stocks a plurality of containers while holding the plurality of containers three-dimensionally and revolving them. The discharge unit discharges the target object from the container while revolving the container.Type: GrantFiled: September 16, 2004Date of Patent: June 24, 2008Assignee: Ishida Co., Ltd.Inventors: Yoshihiro Nakamura, Kazuhiro Suhara, Takashi Kimura, Masayoshi Nakajima, Shuji Murata, Yukio Wakasa, Fumitaka Tokuda
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Patent number: 7332679Abstract: A weighing section includes a plurality of weighing members and a power supply mechanism. The weighing members weigh an object while moving. The power supply mechanism includes a fixed section, a rotatable section moving along the movement of the weighing members, a primary coil provided on the fixed section, and a secondary coil provided on the rotatable section. The power supply mechanism supplies power to the primary coil, retrieves an induced electromotive force from the secondary coil, and supplies power to the weighing members.Type: GrantFiled: October 8, 2004Date of Patent: February 19, 2008Assignee: Ishida Co., Ltd.Inventors: Shuji Murata, Yukio Wakasa, Takashi Kimura, Masayoshi Nakajima
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Publication number: 20070119633Abstract: A weighing section includes a plurality of weighing members and a power supply mechanism. The weighing members weigh an object while moving. The power supply mechanism includes a fixed section, a rotatable section moving along the movement of the weighing members, a primary coil provided on the fixed section, and a secondary coil provided on the rotatable section. The power supply mechanism supplies power to the primary coil, retrieves an induced electromotive force from the secondary coil, and supplies power to the weighing members.Type: ApplicationFiled: October 10, 2004Publication date: May 31, 2007Applicant: ISHIDA CO., LTD.Inventors: Shuji Murata, Yukio Wakasa, Takashi Kimura, Masayoshi Nakajima
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Patent number: 7222144Abstract: A filtering technique which makes it possible to easily and appropriately eliminate a noise without increasing a scale of a circuit necessary for a filtering process even if a noise frequency is liable to be changed is provided. A filter coefficient calculator (6) of a weight measurement apparatus calculates filter coefficients using a predetermined arithmetic expression and outputs them to a signal processor (5). The signal processor (5) carries out a filtering process on a weighing signal (Ds) using the filter coefficients. The arithmetic expression includes a parameter specifying a band position of an attenuation band where attenuation must be locally enhanced. A user can input a value of the parameter via a data entry part (7). In this manner, the filter coefficients can be changed by using a parameter specifying the band position of the attenuation band which is physical and thus easy to grasp.Type: GrantFiled: October 28, 2003Date of Patent: May 22, 2007Assignee: Ishida Co., Ltd.Inventors: Naoyuki Aikawa, Tohru Morichi, Yukio Wakasa
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Publication number: 20070095123Abstract: A filter coefficient calculator of a weight measurement apparatus calculates filter coefficients using a predetermined arithmetic expression and outputs them to a signal processor. The signal processor carries out a filtering process on a weighing signal using the filter coefficients. The arithmetic expression includes a spectrum parameter specifying a band position of an attenuation band where attenuation must be locally enhanced. A user can input a value of the parameter via a data entry part. Each band is specified by the spectrum parameter not as the lowest limit value of a normalized angular frequency, but as the amount of deviation (the amount of displacement) from its center frequency.Type: ApplicationFiled: October 30, 2006Publication date: May 3, 2007Applicant: ISHIDA CO., LTD.Inventors: Naoyuki Aikawa, Yukio Wakasa, Makoto Nakatani
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Publication number: 20070095579Abstract: In order to provide a transport apparatus that enables a trough to be easily removed in one step, and a combination weighing apparatus provided with the same, a transport apparatus (10) is a transport apparatus including a trough (11) and a reciprocating movement mechanism (20), and is configured to convey an article placed in the trough (11) in a predetermined direction. The reciprocating movement mechanism (20) includes a motor box (12), a parallel link (13), and a linking member (16). The parallel link (13) that also functions as a support member includes a first link (13a) and a second link (13b) which respectively have a first depressed part (15a) and a second depressed part (15b) formed on one end part thereof. The first depressed part (15a) and the second depressed part (15b) support protruding parts (11a, 11b) protruding from the trough (11).Type: ApplicationFiled: March 11, 2005Publication date: May 3, 2007Applicant: ISHIDA CO., LTD.Inventors: Toshiyuki Komatsu, Yukio Wakasa
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Publication number: 20060289206Abstract: A weighing device includes a supply unit, a weighing unit, a stock unit, a discharge unit, a transfer unit, and a revolving mechanism. The supply unit supplies a target object to a container revolving in the weighing unit. The weighing unit weighs the container while revolving the same. The stock unit stocks a plurality of containers while holding the plurality of containers three-dimensionally and revolving them. The discharge unit discharges the target object from the container while revolving the container.Type: ApplicationFiled: September 16, 2004Publication date: December 28, 2006Applicant: ISHIDA CO., LTD.Inventors: Yoshihiro Nakamura, Kazuhiro Suhara, Takashi Kimura, Masayoshi Nakajima, Shuji Murata, Yukio Wakasa, Fumitaka Tokuda
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Patent number: 6987227Abstract: The weight detecting apparatus includes a weight detecting load cell having a fixed end fixed to a fixed base arranged on a floor and a free end bearing a weight of an object, a first vibration detecting load cell arranged on the fixed end side of the weight detecting load cell for detecting a vibration component on the fixed end side, i.e., a floor vibration component, and a second vibration detecting load cell arranged on the free end side of the weight detecting load cell for detecting a motor vibration component on the free end side, i.e., the motor vibration component. The weight detecting apparatus precisely detects the weight of the object by removing the vibration component from the detection signal of the weight detecting load cell based on the detection signals of the respective load cells.Type: GrantFiled: March 26, 2004Date of Patent: January 17, 2006Assignee: Ishida, Co., Ltd.Inventor: Yukio Wakasa
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Publication number: 20050252695Abstract: The invention provides a weight detecting apparatus, which can eliminate an influence by vibration disturbance exerted from a device installation side and an object placing side, and thereby can improve detection precision. The weight detecting apparatus includes a weight detecting load cell (31) having a fixed end (31a) fixed to a fixed base (13) arranged on a floor and a free end (31b) bearing a weight of an object (X), a first vibration detecting load cell (32) arranged on the fixed end (31a) side of the weight detecting load cell (31) for detecting a vibration component on the fixed end (31a) side, i.e., a floor vibration component, and a second vibration detecting load cell (33) arranged on the free end (31b) side of the weight detecting load cell (31) for detecting a motor vibration component on the free end (31b) side, i.e., the motor vibration component.Type: ApplicationFiled: March 26, 2004Publication date: November 17, 2005Applicant: ISHIDA CO. LTDInventor: Yukio Wakasa
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Patent number: 6907128Abstract: A noise canceling apparatus (1) comprises an amplifier (10) for amplifying a measured signal (ms) outputted from a measuring device (3), an analog filter (11), an ADC (12), a digital filter (14), a coefficient control section (13), and a data input section (15). The digital filter (14) is a notch filter for attenuating a frequency component of a quantitative signal D(n) outputted from the ADC (12) at a plurality of notches (stop bands). A transfer function of the digital filter (14) is expressed by the product of a plurality of factors each having a root that corresponds to each one of the plurality of notches. The coefficient control section (13) changes a frequency component of a root corresponding to a notch selected from the plurality of notches, and thereafter, expands in a polynomial the transfer function of the reconstructed digital filter (14). On the basis of the polynomial thereby obtained, a new series of filter coefficients is calculated.Type: GrantFiled: May 13, 2003Date of Patent: June 14, 2005Assignee: Ishida Co., Ltd.Inventors: Takashi Kimura, Masayoshi Nakajima, Shuuji Murata, Yukio Wakasa, Kazuhiro Suhara
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Publication number: 20040088342Abstract: A filtering technique which makes it possible to easily and appropriately eliminate a noise without increasing a scale of a circuit necessary for a filtering process even if a noise frequency is liable to be changed is provided. A filter coefficient calculator (6) of a weight measurement apparatus calculates filter coefficients using a predetermined arithmetic expression and outputs them to a signal processor (5). The signal processor (5) carries out a filtering process on a weighing signal (Ds) using the filter coefficients. The arithmetic expression includes a parameter specifying a band position of an attenuation band where attenuation must be locally enhanced. A user can input a value of the parameter via a data entry part (7). In this manner, the filter coefficients can be changed by using a parameter specifying the band position of the attenuation band which is physical and thus easy to grasp.Type: ApplicationFiled: October 28, 2003Publication date: May 6, 2004Applicant: Ishida Co., LtdInventors: Naoyuki Aikawa, Tohru Morichi, Yukio Wakasa
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Patent number: 6694829Abstract: A load cell 1 includes a strain body 2, a bridge circuit and a coating film 10. The bridge circuit is formed of a strain gauge 7 arranged on the strain body 2. The coating film 10 is formed on the strain body 2, covers at least a portion of the strain body 2 attached to a member made of a metal material dissimilar to the strain body and a strain occurring portion of the strain body 2 except for a portion to be attached to the strain gauge 7, includes a coating layer made of resin having a glass transition temperature of 40° C. or more, and has an electrical insulating property.Type: GrantFiled: January 30, 2002Date of Patent: February 24, 2004Assignee: Ishida Co., Ltd.Inventors: Yukiko Chimura, Yukio Wakasa
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Publication number: 20030215100Abstract: A noise canceling apparatus (1) comprises an amplifier (10) for amplifying a measured signal (ms) outputted from a measuring device (3), an analog filter (11), an ADC (12), a digital filter (14), a coefficient control section (13), and a data input section (15). The digital filter (14) is a notch filter for attenuating a frequency component of a quantitative signal D(n) outputted from the ADC (12) at a plurality of notches (stop bands). A transfer function of the digital filter (14) is expressed by the product of a plurality of factors each having a root that corresponds to each one of the plurality of notches. The coefficient control section (13) changes a frequency component of a root corresponding to a notch selected from the plurality of notches, and thereafter, expands in a polynomial the transfer function of the reconstructed digital filter (14). On the basis of the polynomial thereby obtained, a new series of filter coefficients is calculated.Type: ApplicationFiled: May 13, 2003Publication date: November 20, 2003Applicant: Ishida Co., Ltd.Inventors: Takashi Kimura, Masayoshi Nakajima, Shuuji Murata, Yukio Wakasa, Kazuhiro Suhara
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Publication number: 20020139203Abstract: A load cell 1 includes a strain body 2, a bridge circuit and a coating film 10. The bridge circuit is formed of a strain gauge 7 arranged on the strain body 2. The coating film 10 is formed on the strain body 2, covers at least a portion of the strain body 2 attached to a member made of a metal material dissimilar to the strain body and a strain occurring portion of the strain body 2 except for a portion to be attached to the strain gauge 7, includes a coating layer made of resin having a glass transition temperature of 40° C. or more, and has an electrical insulating property.Type: ApplicationFiled: January 30, 2002Publication date: October 3, 2002Applicant: ISHIDA, CO., LTD.Inventors: Yukiko Chimura, Yukio Wakasa
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Patent number: 6034334Abstract: A weighing machine, such as a combinational weighing machine, has scale cells and a plurality of dummy cells installed on the same floor. The scale cells output weight signals corresponding to the weights of objects being loaded. The mode of vibrations of the floor is detected from dummy signals from the dummy cells, vertical displacements of the floor at the positions of the scale cells are calculated, and their effects are eliminated from the weight signals. Those of the scale cells not selected after a cycle of combinational calculations can be used as dummy cells in the next cycle. A memory device may be provided to store preferred combinations of such scale cells not selected that may be used for this purpose. Effects of the floor vibrations can be eliminated more accurately if the differences in sensitivity among the cells due to physical characteristics of the individual cells and/or due to the different loads on them can be taken into account either by a feedback calculation or by a formula.Type: GrantFiled: April 12, 1995Date of Patent: March 7, 2000Assignee: Ishida Co. Ltd.Inventors: Yoshihiro Nakamura, Yukio Wakasa, Kazufumi Naito, Hidekatsu Tokumaru, Shoko Tajiri
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Patent number: 6013879Abstract: A multi-point cell type weighing machine has a plural number of scale cells set on a floor to support a table and to output weight signals indicative of weights measured thereby of a target object placed on the table. One or more floor vibration detecting cells are set on the same floor and output floor vibration detection signals indicative of the vibrations of the floor. The weight signals are corrected on the basis of vibration components of the floor vibration detection signals. A standard weight is placed at a larger plural number of places on the table than there are scale cells and output sensitivity ratios among the scale cells are calculated from outputted values from the scale cells, and the weight signals are further corrected on the basis of the output sensitivity ratios. These weight signals are added together and the weight of the target object is obtained from the added signal.Type: GrantFiled: September 3, 1997Date of Patent: January 11, 2000Assignee: Ishida Co., Ltd.Inventors: Yoshihiro Nakamura, Yukio Wakasa, Kazufumi Naito
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Patent number: 5814772Abstract: A weighing apparatus has a weighing conveyor with a conveyor belt driven by a drive motor for transporting and weighing an object at the same time and outputting a weight signal indicative of its weight. The lengths of the weighing conveyor and the object in the direction of transportation are inputted and the weight signals outputted by the weighing conveyor are filtered so as to eliminate vibration components due to the vibration of the conveyor. The distance traveled by the object on the weighing conveyor is detected from the angle of rotation of the drive motor, and the timing for processing the weight signals, or when to start the measurement of weight and when to obtain the weight value, is determined independent of the transportation speed of the belt but from the detected distance traveled by the object and the inputted length values.Type: GrantFiled: January 3, 1996Date of Patent: September 29, 1998Assignee: Ishida Co., Ltd.Inventors: Ryoji Nishimura, Yukio Wakasa, Ryoichi Sato
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Patent number: 5789713Abstract: A weighing method and apparatus includes a weighing cell for weighing an article and outputting a weighing signal corresponding to the weight thereof and a floor vibration detecting cell for detecting vibration of a floor on which the weighing cell is installed and for outputting a floor vibration detection signal. The weighing signal and the floor vibration detection signal are selectively sampled at a predetermined sampling frequency and an A/D converter converts each of the sampled signals into a digital weighing signal or a digital floor vibration detection signal, respectively. A first digital filter filters the digital weighing signal and a second digital filter filters the digital floor vibration detection signal. A floor vibration compensator subtracts the filtered digital floor vibration detection signal from the filtered digital weighing signal and outputs a floor vibration compensated signal wherein an error of the weighing signal caused by the floor vibration is compensated for.Type: GrantFiled: July 25, 1996Date of Patent: August 4, 1998Assignee: Ishida Co., Ltd.Inventors: Yukio Wakasa, Shoko Tajiri
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Patent number: 5753866Abstract: A combinational weigher measures articles with a plurality of measuring devices and selects a combination of the articles with a total weight within an allowable range. The weigher has a device for supplying the articles, cameras for taking pictures of at least either this article supplying device or the articles thereon, an image processing device for determining the condition of the article supply on the basis of image signals from the cameras, a predicting device for predicting the change in the amount of the supplied articles on the basis at least of the condition thus determined, and a control device for changing the operating conditions of the supplying device on the basis of this prediction so as to control changes in the supply rates of articles to the measuring devices.Type: GrantFiled: June 24, 1996Date of Patent: May 19, 1998Assignee: Ishida Co., Ltd.Inventors: Tetsuo Ikeda, Yukio Wakasa, Tohru Morichi