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1. 发明专利

JPH0763375A DAMPING DEVICE FOR OUTDOOR EQUIPMENT 失效
公开(公告)号：JPH0763375A
公开(公告)日：1995-03-07
申请号：JP21125393
申请日：1993-08-26
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： SATO TAICHI , MORI FUKUJI , TOYOSHIMA NAOKAZU , TANAKA KIHACHIRO , OKAMOTO JOJI , IZUSHI MINETOSHI , SAKUMA KOJI , YONEYAMA HIROYASU
IPC分类号： F24F5/00
摘要： PURPOSE:To reduce vibration noise by mounting a fan which constitutes an air supply and air suction means to a shaft of a drive motor by way of an elastic member which presses the fan in its axial direction and an adjustment device which changes and adjusts a pushing force. CONSTITUTION:A sheet body 21 presses a corrugated spring 22 in the direction of a motor by changing and adjusting a pressing force of the corrugated spring by screwing into a threaded part of a nut 23. The sheet body 21 is unable to move up to an end face 150 of a small-sized portion 15 where it is fixed with a motor shaft 7, which makes it possible to set a clearance dimension required to add a specified pressing force to the corrugated spring 22. As a result, a socket unit 19 of a fan 5 is pressed by an offset surface 10 of the motor shaft 7 so that the fan 5 may be elastically mounted to the motor shaft 7, thereby minimizing the stiffness of a twisted spring of the motor shaft 7. This construction makes it possible to absorb electromagnetic vibration from the motor and reduce the vibration.

2. 发明专利

JPH07293922A INDOOR MACHINE OF AIR CONDITIONER 失效
公开(公告)号：JPH07293922A
公开(公告)日：1995-11-10
申请号：JP8433294
申请日：1994-04-22
申请人： HITACHI LTD
发明人： SATO TAICHI , MORI FUKUJI , TANAKA KIHACHIRO , SATO RYOJI , HOSHITA HIROYUKI
IPC分类号： F16F15/10 , F24F1/00
摘要： PURPOSE:To reduce the noise of an indoor machine by decreasing the vibration transmitted to a fan from a fan driving motor and also to reduce the noise of a case body and a panel by enhancing the rigidity of a shaft system. CONSTITUTION:All of fans 6a, 6b and 6c provided in a plurality are fitted to a shaft 4 and this shaft 4 and a shaft 38 of a motor 7 are connected through the intermediary of a vibration-proof joint 5. Moreover, a bearing 3 is disposed at a shaft part between the outermost fan 6a and the fan 6b inside of it so that the natural frequency of a shaft system be the highest. The vibration transmitted from the motor 7 to the fans 6a to 6c is decreased by the vibration-proof joint 5 and, as the result, the noise caused by electromagnetic vibration can be reduced. Since the rigidity of the shaft system is enhanced, on the other hand, the vibration of a case body and a panel can be reduced.

3. 发明专利

JPH07217935A VIBRATION PREVENTING DEVICE OF AIR-CONDITIONER 失效
公开(公告)号：JPH07217935A
公开(公告)日：1995-08-18
申请号：JP1146794
申请日：1994-02-03
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： SATO TAICHI , OKAMOTO JOJI , NAGAHASHI KATSUAKI , SASAKI TOSHIHARU , KOBAYASHI ATSUYASU , MORI FUKUJI , TANAKA KIHACHIRO
IPC分类号： F16F15/08 , F24F13/22 , H02K5/24 , F24F1/00
摘要： PURPOSE:To contrive to lower a noise of an indoor machine by lowering a vibration which transfers to a box body from a drain pump driving motor. CONSTITUTION:A drain pump driving motor is fastened to a drain pump supporting material 59 through a vibration preventing rubber 58 by a non- magnetic bolt 57. The bolt 57 is inserted into a hole of the vibration preventing rubber 58 with almost non-touching condition, and is so composed that a vibration from a motor does not transfer to the drain pump supporting material 59. Accordingly, a noise caused by an electromagnetic vibration from the drain pump driving motor can be largely decreased, and a lowering of the noise sound of an indoor machine can be contrived.

4. 发明专利

JPH0515508A MAGNETIC RESONANCE IMAGING APPARATUS 失效
公开(公告)号：JPH0515508A
公开(公告)日：1993-01-26
申请号：JP16961791
申请日：1991-07-10
申请人： HITACHI LTD
发明人： SATO TAICHI , MORI FUKUJI , TANAKA KIHACHIRO , HONMEI TAKAO , OTSUKA MASAYUKI , WADA MASAJI
IPC分类号： A61B5/055 , G01R33/20 , G01R33/28 , G01R33/385 , H01F5/00
摘要： PURPOSE:To achieve a lower noise of a magnetic resonance imaging apparatus by supporting a coil rigidly on a bobbin while vibration to the bobbin from the coil is insulated. CONSTITUTION:A bobbin 10 and a coil 7 are bound firmly through a rigid pipe member 8. The pipe member 8 is sealed with a particulate material 6 and vibration from the coil is transmitted not only to the bobbin but also the particulate material. Thus, the vibration being transmitted to the bobbin from the coil reduces to achieve a lower vibration of the bobbin thereby accomplishing a lower noise of a magnetic resonance imaging apparatus.

5. 发明专利

JPH02107471A METHOD AND APPARATUS FOR DIRECT ACTING BODY AND PRINTER 失效
公开(公告)号：JPH02107471A
公开(公告)日：1990-04-19
申请号：JP26073788
申请日：1988-10-17
申请人： HITACHI LTD
发明人： SATO TAICHI , MORI FUKUJI , TAKAHASHI TORU , TANAKA KIHACHIRO , TAMATSU TOSHIYUKI
IPC分类号： B41J19/18 , B41J29/08 , G05D3/12
摘要： PURPOSE:To enable suppression of the amplitude of vibration of a vibrating system by using a trapezoid pattern comprising an accelerating feed part, a constant-velocity feed part and a decelerating feed part, as a fundamental pattern of a velocity pattern, and providing an additional velocity pattern at a transition part from the acceleration to the constant-velocity feed of a direct acting body so as to attenuate a residual vibration of the body. CONSTITUTION:A feeding device for a printing head 1 so functions that a paper 16 is fed between a platen 11 and the head 1, and printing wires are protruded from the head 1 against a ribbon 17 disposed between the paper 16 and the head 1, thereby printing. Motive power from a driving motor 15 is transmitted through driving pulleys 12, 14 and a driving belt 13 to a carrier 2, whereby the carrier 2 can be moved in the longitudinal directions of support rails 3, 4. As a velocity pattern for the carrier, an added trapezoid pattern is adopted in which a section of a velocity higher than a velocity for a constant-velocity feed is provided for a predetermined time T0 from the moment of shifting from an acceleration to the constant-velocity feed. With the velocity pattern adopted and with the time T0 in the added trapezoid pattern selected appropriately, a residual vibration is reduced, and slippage in printing is substantially eliminated.

6. 发明专利

JPH01237183A INK RIBBON 失效
公开(公告)号：JPH01237183A
公开(公告)日：1989-09-21
申请号：JP6337588
申请日：1988-03-18
申请人： HITACHI LTD
发明人： SATO TAICHI , MORI FUKUJI , TANAKA KIHACHIRO , TAMATSU TOSHIYUKI , UENO AKIO , IKEMURA TOSHIRO , TACHIBANA MAKOTO
IPC分类号： B41J31/00 , B41J31/02
摘要： PURPOSE:To eliminate ununiformity in printed density in the feeding direction of a printing head and enhance printing quality, by a construction wherein the value obtained by dividing the diameter of a printing wire by the weaving pitch in the weft direction of an ink ribbon is an integer of at least 2. CONSTITUTION:A printing head 1 is mounted on a carrier 2, and printing wires are projected from a tip part 1a of the head 1 to impact against a paper through an ink ribbon 17. The ink ribbon 17 has a plain weave texture comprising warps 20 and wefts 21 intersecting alternately each other, and the length 2bt in the warp direction is the weaving pitch of the wefts. It is considered that the area P of the ribbon when the diameter bw of the printing wire 22 is projected on a model of section of the ribbon is substantially proportional to the printing pressure on the paper by the impact, and the ratio Pmin/Pmax of the minimum Pmin to the maximum Pmax of the area P represents the ununiformity in printed density. Namely, when Pmin/Pmax=1, the printing pressure is constantly fixed, and printed density is uniform. When an ink ribbon in which the ratio Aw=bw/2 bt of the diameter bw of the printing wire to the weaving pitch 2bt of the ribbon is an integer of at least 2 is used, a uniform printed density is obtained.

7. 发明专利

JPH07144420A PRINTING HEAD AND PRINTER 失效
公开(公告)号：JPH07144420A
公开(公告)日：1995-06-06
申请号：JP13735894
申请日：1994-06-20
申请人： HITACHI LTD
发明人： SATO TAICHI , MORI FUKUJI , TANAKA KIHACHIRO , OHARA SHUNICHI , AOKI KATSUMI , ARIGA MASAKI , ASANO AKIRA , TAMATSU TOSHIYUKI , IKEMURA TOSHIRO
IPC分类号： B41J2/235 , B41J2/28
摘要： PURPOSE:To provide a printing head capable of preventing a vibrating nozzle plate, the vibration of which is caused by collision between an armature and a core, from becoming a noise source. CONSTITUTION:A damping mass 17 comes in friction contact with a core 1 but hardly vibrates when the core 1 vibrates. A corrugated sheet can be provided between the damping mass 17 and the core 1. Consequently, the damping mass 17 provided on the core 1 attenuates the vibration of the core itself immediately, if the vibration caused by the impact between the armature and the core is transmitted through the core, so that the vibration is prevented from being transmitted to a nose plate.

8. 发明专利

JPH07139752A VIBRATION ISOLATING DEVICE OF AIR CONDITIONER 失效
公开(公告)号：JPH07139752A
公开(公告)日：1995-05-30
申请号：JP29023993
申请日：1993-11-19
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： SATO TAICHI , OKAMOTO JOJI , SASAKI TOSHIHARU , KOBAYASHI ATSUYASU , MORI FUKUJI , TANAKA KIHACHIRO
IPC分类号： F04D29/52 , F16F15/08 , F24F13/22 , F24F1/00
摘要： PURPOSE:To reduce the noise of an indoor machine by reducing vibration transmitted from a motor for driving a drain pump to a case body. CONSTITUTION:A motor 52 for driving a drain pump is fastened to a drain pump support member 59 by nonmagnetic bolts 57 through the intermediary of rubber 58. In another way, the motor 52 for driving the drain pump is fastened to a nonmagnetic drain pump support member 59 by the nonmagnetic bolts 57 through the intermediary of the rubber 58. According to this constitution, the noise caused by electromagnetic vibration from the motor for driving the drain pump can be lessened in a large extent and the noise of an indoor machine can be made low.

9. 发明专利

JPH07103191A FAN FOR AIR CONDITIONER 失效
公开(公告)号：JPH07103191A
公开(公告)日：1995-04-18
申请号：JP25279193
申请日：1993-10-08
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： YONEYAMA HIROYASU , TOYOSHIMA NAOKAZU , NAGAI MAKOTO , SASAKI TOSHIHARU , OKAMOTO JOJI , SATO TAICHI , MORI FUKUJI , TANAKA KIHACHIRO
IPC分类号： F04D29/28
摘要： PURPOSE:To prevent the propagation of vibration from a motor to a fan in a simple manner by holding an impeller attached to a driving shaft projecting out of the motor with two rubber preventers consisting of two plates holding rubber between, and forming a clearance in an interval between the impeller and the driving shaft. CONSTITUTION:In this air conditioner fan, an impeller is attached to a driving shaft 2a projecting out of a motor. In this case, this impeller is held by two rubber preventers consisting of two plates holding rubber between, and a clearance is formed in an interval between the impeller and the driving shaft. In brief, a driving shaft diameter A is set to be smaller than a driving shaft inserting hole diameter B and thereby the driving shaft 2a and the fan are always maintained in a noncontact way, whereby vibration in the motor is prevented from being propagated to the fan, forestalling any noise due to resonance. On the other hand, torque out of the driving shaft 2a is transmitted via plural rubber vibration insulators. Each rubber vibration insulator is made up of unitizing each of flat washers 3a, 3g, pinned washers 3c, 3e and rubber pieces 3b, 3f as one boy and these elements are attached to the motor side and the shaft end side respectively.

10. 发明专利

JPH05317283A MAGNETIC RESONANCE IMAGING DEVICE 失效
公开(公告)号：JPH05317283A
公开(公告)日：1993-12-03
申请号：JP12171792
申请日：1992-05-14
申请人： HITACHI LTD
发明人： SATO TAICHI , MASUDA HIROMITSU , MORI FUKUJI , TANAKA KIHACHIRO
IPC分类号： A61B5/055 , G01R33/20 , G01R33/38
摘要： PURPOSE:To avoid giving an uncomfortable feel to the testee by lowering the load to be generated by ramp magnetic field coils, thereby lowering the noise of the magnetic resonance imaging device. CONSTITUTION:Attenuating elements (vibration damping materials or members encapsulated with granular bodies) are provided on the flanks of the ramp magnetic field coils 6, 7 and the coils are mounted on a bobbin 10. Since the attenuating members are provided in the ramp magnetic field coils 6, 7, the vibration displacement thereof is small. Namely, the load generated by the ramp magnetic field coils 6, 7 is small. Since such coils are placed on the bobbin 10, the vibration and noise of the magnetic resonance imaging device are drastically decreased.

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