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1. 发明专利

JPH0393021A HERICAL SCAN TYPE MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH0393021A
公开(公告)日：1991-04-18
申请号：JP22928789
申请日：1989-09-06
申请人： JAPAN BROADCASTING CORP , SANKYO SEIKI SEISAKUSHO KK
发明人： YANAGISAWA HITOSHI , SEKIGUCHI TAKUJI , OKINA TOSHIHIKO , HASHIZUME TSUNEHARU
IPC分类号： G11B5/53
摘要： PURPOSE:To set the contact state of a magnetic tape and a magnetic head to be satisfactory by fitting the magnetic head by means of inclining it from a plane intersecting orthogonally with the rotary axis of a rotary drum to a fixed drum-side. CONSTITUTION:The magnetic head 10 is provided with a head chip 3, a head base 5 and a spacer 6. The chip 3 is provided so that it inclines to the fixed drum-side by a prescribed angle theta against the plane B intersecting orthogonally with the rotary axis A by fitting the base 5 on the bottom 11 intersecting orthogonally with the rotary axis A of the rotary drum 1 in the head 10. The magnetic tape 4 travels on the drum surface 9 of the drums 1 and 2 while it is wound to the drums 1 and 2. Thus, the chip 3 obliquely scans on the tape 4 at high speed by allowing the chip 3 fixed to the drum 1 to rotate at high speed together with the drum 1.

2. 发明专利

JPH01271957A TAPE TRAVELING MECHANISM 失效
公开(公告)号：JPH01271957A
公开(公告)日：1989-10-31
申请号：JP9915488
申请日：1988-04-21
申请人： JAPAN BROADCASTING CORP , SANKYO SEIKI SEISAKUSHO KK
发明人： KATO TAIICHIRO , YANAGISAWA HITOSHI , ABE KAZUO , MITSUYASU TAMOTSU , SEKIGUCHI TAKUJI , HASHIZUME TSUNEHARU , OKINA TOSHIHIKO , MIYASHITA MITSUKI
IPC分类号： G11B15/60
摘要： PURPOSE:To travel a tape surely and stably by detecting an error from the reference height position of the tape by a sensor and adsorbing the tape onto a post without a regulating edge and correcting activity the up-and-down position of the tape by an actuator. CONSTITUTION:There are diaphragms 2 connected to a tube 5 on a post to guide a traveling tape 7, air is sucked and the tape 7 is adsorbed onto the post 1 by negative pressure. Photosensors 8 are set on the side of the post, the tape 7 detects the up-and-down (tape width direction) fluctuation quantity from the reference height position, feeds it back to a voice coil 4 and both the post 1 and the adsorbed tape 7 are driven to their regular positions by a voice coil motor composed of a coil 4 and a magnet 6. Thus, the up-and-dowm fluctuation can be corrected without damaging the edges of the tape 7 and the action of a traveling system can be surely stabilized.

3. 发明专利

JPH01315057A TAPE DRIVING MECHANISM 失效
公开(公告)号：JPH01315057A
公开(公告)日：1989-12-20
申请号：JP14755888
申请日：1988-06-15
申请人： JAPAN BROADCASTING CORP , SANKYO SEIKI SEISAKUSHO KK
发明人： MITSUYASU TAMOTSU , KATO TAIICHIRO , YANAGISAWA HITOSHI , HASHIZUME TSUNEHARU , MIYASHITA MITSUTAKA , OKINA TOSHIHIKO
IPC分类号： G11B15/60
摘要： PURPOSE:To attain the stable drive of a tape and to prevent the damage of the tape edge part by tilting a post via an actuator with the detecting output of a sensor which detects the up-down movements of the tape and controlling the up-down positions of the tape. CONSTITUTION:A tape 3 rubs the outer circumferential surface of a post 1. A piezoelectric element 2 warps when it receives the DC voltage. As a result, the post 1 fixed at a single end part 2a is tilted. In case the tape 3 moves up and down from its prescribed reference position, a sensor detects the shift extent of the tape 3. Then the element 2 is curved in response to the detecting output of the sensor. Thus the post 1 is tilted in an optional direction at an optional angle. Then the tape 3 is moved up and down and the up-down position of the tape 3 is controlled.

4. 发明专利

JPH07317765A FLUID BEARING DEVICE 失效
公开(公告)号：JPH07317765A
公开(公告)日：1995-12-08
申请号：JP13665294
申请日：1994-05-27
申请人： SANKYO SEIKI SEISAKUSHO KK
发明人： HASHIZUME TSUNEHARU
IPC分类号： F16C32/04 , F16C33/10
摘要： PURPOSE:To prevent lubrication fluid from leaking during bearing assembly operation and use and air from remaining in a bearing by forming a hole for air relief and lubrication fluid pouring in a thrust bearing member. CONSTITUTION:Fluid 8 is made to intervene between a housing 1, one end of which is closed by a thrust bearing member 7 and a shaft 4 to be contained in the housing 1. Either the housing 1 or the shaft 4 is rotatably supported as a rotary side member by the other member as a stationary side member. A hole 6 is formed as air relief hole and lubrication fluid pouring hole in this thrust bearing member 7. By this constitution, when the thrust bearing member 7 is press-fitted and assembled, air and extra lubrication fluid 8 are pushed out from the thrust bearing member 7, and the lubrication fluid 8 does not leak from other portion. Since even after fixing the thrust bearing 7, the lubrication fluid 8 can be supplemented, air does not remain in a bearing device.

5. 发明专利

JPH07111030A BEARING FLUID SEALING STRUCTURE FOR MOTOR 失效
公开(公告)号：JPH07111030A
公开(公告)日：1995-04-25
申请号：JP28161493
申请日：1993-10-15
申请人： SANKYO SEIKI SEISAKUSHO KK
发明人： NOSE TAMOTSU , HASHIZUME TSUNEHARU
IPC分类号： G11B19/20
摘要： PURPOSE:To reduce the side, weight and cost of a motor by forming a structure which is heretofore composed of separate parts and is made to a large size to simple and small-sized constitution. CONSTITUTION:A magnetic fluid stagnating passage 25 arriving from a sliding bearing 232 at a magnetic fluid seal 24 is delineated by a stopper plate 227 having a stopper function of a rotor set 23. A magnetic circuit is formed between the magnet 24a of the magnetic fluid seal 24 and the stopper plate 227 consisting of a magnetically permeable material by this magnet 24a. The magnetic fluid for bearings is held in this stagnating passage 25 and the stopper plate 227 is attracted and held by the magnetical attraction force based on this magnetic circuit. The stopper mechanism, the sealing mechanism and the thrust force holding mechanism are thus concentrically arranged at one point by the integral and simple constitution.

6. 发明专利

JPH07217645A THRUST BEARING DEVICE 失效
公开(公告)号：JPH07217645A
公开(公告)日：1995-08-15
申请号：JP3201794
申请日：1994-02-04
申请人： SANKYO SEIKI SEISAKUSHO KK
发明人： HASHIZUME TSUNEHARU
IPC分类号： F16C17/04
摘要： PURPOSE:To simplify the shape of dynamic pressure generating grooves so as to be machined easily without needing high accuracy and reduce manufacturing cost. CONSTITUTION:Dynamic pressure grooves 4 are linear grooves disposed parallel to a diametral straight line 7 passing the rotational center 0 of a rotary shaft 1 and in a position advanced by alpha in the rotating direction from the straight line 7. Since the grooves 4 can be formed linearly at a thrust receiving plate 3 or the end face 2 of the rotary shaft 1, the grooves 4 can be machined by a relatively simple machining method such as grinding, polishing and compression-molding.

7. 发明专利

JPH0712127A FLUID BEARING DEVICE 失效
公开(公告)号：JPH0712127A
公开(公告)日：1995-01-17
申请号：JP17860093
申请日：1993-06-28
申请人： SANKYO SEIKI SEISAKUSHO KK
发明人： HASHIZUME TSUNEHARU
IPC分类号： F16C33/74 , F16C17/02 , F16C17/08 , F16C32/06 , F16C33/10 , F16J15/54
摘要： PURPOSE:To heighten lubricating fluid leakage preventing performance by fixing a lubricating fluid shpt-off member to a fitting face formed at a rotating member. CONSTITUTION:A housing 2 and bearing members 4, 4 are fixed members, and a rotary shaft 5 and a hub 6 are rotating members. A fitting face 11 is formed at the lower end of the hub 6, in the direction 10 orthogonal to the axis 9 of the hub 6, and this fitting face 11 is formed as an annular plane around the rotary shaft 5. A shut-off member 7 for shutting off a fluid is fixed to the fitting face 11 by bonding, for instance. This shut-off member 7 is annularly formed of resin or other optional material, and oil repellent treatment is applied to the surface so as to repel the base oil of lubricating oil or a magnetic fluid. A micro clearance 13 is formed between the rotary shaft 5 and the inner peripheral surface of the shut-off member 7, but since the hub 6 with the shut-off member 7 fixed thereto is press-fitted to the rotary shaft 5, the magnetic fluid does not leak from this clearance 13.

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