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21. 发明专利

JP2000354693A COVERING CHAIN STITCH SEWING MACHINE FOR HEM BLIND OVER EDGING WITH SEWING SLIPPAGE PREVENTING DEVICE 失效
公开(公告)号：JP2000354693A
公开(公告)日：2000-12-26
申请号：JP20664499
申请日：1999-06-15
申请人： YAMATO SEWING MACH CO LTD
发明人： NAKADA NORIO , KURATA HIROMICHI , MASAOKA TAKAYOSHI , OKABE MASATO , SAKAI ITSUO
IPC分类号： D05B35/02 , D05B1/10 , D05B35/10 , D05B69/36
摘要： PROBLEM TO BE SOLVED: To prevent sewing failures such as sewing slippage reliably by detecting in advance the occurrence of a location displacement in the lower-side part of cloth to be subjected to hem blind over edging and the presence of a deformed part due to a sewing error. SOLUTION: A folded width guide 7 and a cloth edge guide 8 are opposed to each other at a location in the front of a needle location 6. A sewing slippage detecting sensor 10 to detect the presence or absence of sewing slippage by detecting the location of the edge W1a of the lower-side part W1 of folded cloth is provided on the side of the cloth edge guide 8. When the amount of sewing slippage detected by the sensor 10 exceeds the allowable amount of sewing slippage, it is determined that there is a possibility of sewing slippage, and an announcing means is operated for announcement.

22. 发明专利

JPH11226283A NEEDLEBAR STROKE ADJUSTING DEVICE OF SEWING MACHINE 失效
公开(公告)号：JPH11226283A
公开(公告)日：1999-08-24
申请号：JP3509298
申请日：1998-02-17
申请人： YAMATO SEWING MACH CO LTD
发明人： IWAI KATSUHIKO , MIZUSAKI TAKASHI , OKABE MASATO
IPC分类号： D05B55/14 , D05B69/00
摘要： PROBLEM TO BE SOLVED: To enable easy and secure adjusting of a needlebar stroke by a position adjusting of an eccentric pin which connects a connecting rod of the needlebar and a crank, and prevent loosening and misalignment after the adjusting. SOLUTION: A crank 2 and a connecting rod 3 are connected between respective fitting parts 4a and 4b by an eccentric pin 4 having a specified eccentricity. A positioning ring 6 is fitted on a periphery of the fitting part 4a on the crank 2 side, wherein engaging grooves 6a and 6b are formed corresponding to an eccentric direction of the other fitting part 4b. An engaging projection 5 is formed by a means such as placing of a pin or the like on an edge face of a crank 2 facing the positioning ring 6. The eccentric pin 4, wherein the fitting part 4a is fitted to the crank 2, is positioned in the peripheral position, wherein one of the engaging grooves 6a or 6b is engaged with the engaging projection 5.

23. 发明专利

JPH1119369A DRIVE DEVICE FOR INDUSTRIAL SEWING MACHINE 失效
公开(公告)号：JPH1119369A
公开(公告)日：1999-01-26
申请号：JP21113497
申请日：1997-06-30
申请人： YAMATO SEWING MACH CO LTD
发明人： MIZUSAKI TAKASHI , OKABE MASATO
IPC分类号： D05B69/30 , D05B71/00 , F16H7/02
摘要： PROBLEM TO BE SOLVED: To enable a rotation transmission action by a timing belt to be maintained stably over a long period of time even during a stitching operation under conditions where dust such as thread waste is scattered around, while achieving the simplification of a structure, the facility of maintenance services/ handling of a drive system and the improvement of power transmission efficiency. SOLUTION: The output shaft 20a of a motor 20 for driving a sewing machine supported on the rear part of a sewing machine body 12 on a part above the setting face of a sewing machine table through a bracket 17, is connected and interlocked with the main shaft 14 of the sewing machine protruding on the lateral part of the sewing machine body 12 with timing pulleys 21, 22 and a timing belt 23. In addition, a dustproof cover 24 covering the entirely of the pulleys 21, 22 and the belt 23 is set on the bracket 17. Further, an dustproof airtight seal 27 for blocking a gap between the inner peripheral edge of a hole 26 through which the main shaft 14 of the sewing machine penetrating the bracket 17 is introduced and the outer peripheral face of the main shaft 14 of the sewing machine, is provided on the inner peripheral edge of the hole 26, so that the interior of the dustproof cover 24 is kept airtight.

24. 发明专利

JPH0966183A LOOPER THREAD REELING DEVICE 失效
公开(公告)号：JPH0966183A
公开(公告)日：1997-03-11
申请号：JP22534895
申请日：1995-09-01
申请人： YAMATO SEWING MACH CO LTD
发明人： MIZUSAKI TAKASHI , NISHIWAKI ICHIRO , OKABE MASATO
IPC分类号： D05B63/02 , D05B63/00
摘要： PROBLEM TO BE SOLVED: To provide a looper thread reeling device which is arranged so as not to hinder sewing work and can easily perform auxiliary work such as setting of looper thread and an adjustment of a relaxing degree. SOLUTION: A looper thread reeling device 8 is installed in a position separate from a sewing machine bed B on a left side surface facing a needle falling position of a leg part C to support the base end of a sewing machine arm A on the sewing machine bed B. A thread reeling cam 80 is fixed to a rotary shaft projecting from the left side surface of the leg part C, and this rotary shaft is interlocked with and connected to a sewing machine main shaft inside of the sewing machine bed B or an upper shaft inside of the sewing machine arm A inside of the leg part C, and is constituted so as to rotate in synchronism with a vertical movement of needles 1, 1... on the tip of the sewing machine arm A and advance-retreat operation of a looper in the sewing machine bed B.

25. 发明专利

JPH08131681A LOOPER DRIVE DEVICE 失效
公开(公告)号：JPH08131681A
公开(公告)日：1996-05-28
申请号：JP27265394
申请日：1994-11-07
申请人： YAMATO SEWING MACH CO LTD
发明人： MIZUSAKI TAKASHI , OKABE MASATO
IPC分类号： D05B57/32
摘要： PURPOSE: To provide a looper drive device capable of smooth and stable transmission from a looper arm to a looper bar and contributing to high speed sewing. CONSTITUTION: A looper bar 1 with a looper 10 on one end is supported by a pair of supporting cylinder 20 and 21 of a looper guide 2. A guide protrusion 30 protrudingly constructed on a slider 3 fixed to the looper bar 1 is inserted into a long guide hole 24 constructed on the looper guide 2 and fitted into a guide rod 25 constructed on the guide hole 24 to be slidably guided in the shaft length direction. A ball joint 5 is fixed on the attaching side end of the slider 3 of the looper bar 1, and a through hole passing through the shaft center of a ball body 50 held by a socket 51 of the ball joint 5. A connection rod 40 is protrudingly installed at the tip of a looper arm 4, of which the base part is fitted by a looper oscillating shaft S2 , to oscillate around the shaft of the looper oscillating shaft S2 and the connection rod 40 is inserted into the through hole of the ball body 50 to transmit the oscillation of the looper arm 40 to the looper bar 1 via the ball joint 5 and to move the looper bar 1 lengthwise along the shaft.

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