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1. 发明专利

JPH0592638A REGULATING DEVICE FOR PRINT HEAD GAP OF PRINTER 失效
公开(公告)号：JPH0592638A
公开(公告)日：1993-04-16
申请号：JP22689791
申请日：1991-09-06
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： TACHIBANA MAKOTO , UENO AKIO , KANEKO HIROSHI , OKUDA YUTAKA , WATABE TOSHIO , YOKOI TAKAO
IPC分类号： B41J25/308
摘要： PURPOSE:To prevent shading of a printing character from being generated by varying preparation of a gap between a print head and a platen linearly in one direction without rotating a support rail by a method wherein rotation of an eccentric cam fitted to the support rail and a moving direction of the support rail are forced with a fitting hole of a frame. CONSTITUTION:A print head 1 moves in the same way as movement of a support rail 6, and the support rail 6 is varied forcively in one direction in an oval hole of a frame 5 supporting a constant support rail 6 by rotation of eccentric cams at both end parts. The cam 7 is pushed against a roller 8 with a spring 9, and only the cams are simultaneously rotated with gear parts of left and right cams 7. Since the print head 1 can move in a straight line to a paper surface, each dot composing a character, i.e., a gap between each wire of the print head 1 and the paper surface can be kept at a specific value according to thickness of paper, and both high speed printing and high printing quality can be realized without generating shading of the character.

2. 发明专利

JPH05104795A PRINTER 失效
公开(公告)号：JPH05104795A
公开(公告)日：1993-04-27
申请号：JP22561791
申请日：1991-09-05
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： UENO AKIO , TACHIBANA MAKOTO , WATABE TOSHIO , OKUDA YUTAKA , YOKOI TAKAO , KANEKO HIROSHI
IPC分类号： B41J11/66 , B65H20/04
摘要： PURPOSE:To cut paper easily on a printer by using a simplified structure in which a cutter and paper bail roller are formed into an integrated unit and fixed to a frame. CONSTITUTION:A paper bail roller 5 is placed at a cutter 8, both roller and cutter are integrated as cutter unit, and the paper bail roller is fixed to a platen 2 so as to be always in contact with the platen. When paper is initialized in a printer constituted in this manner, the correction of slackening of the paper is performed by a control system, where the dimension of the tip of the paper is set to a dimension (H-B) somewhat shorter than the dimension H from the center of a print head 1 to the tip of the edge of the cutter and thereafter the B-dimension is let out.

3. 发明专利

JPH058510A COOLING DEVICE OF PRINT HEAD 失效
公开(公告)号：JPH058510A
公开(公告)日：1993-01-19
申请号：JP16020091
申请日：1991-07-01
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： INUI MASAHIRO , WATABE TOSHIO
IPC分类号： B41J2/235 , B41J29/377
摘要： PURPOSE:To restrain a temperature rise of a print head and improve the durability and safety at a low cost by a method wherein a heat conductive material is tightly attached between the print head and a carrier to which the print head is mounted so that heat generated due to printing action easily escapes toward the carrier side. CONSTITUTION:A heat conductive material 2 is formed into a shape that fits a gap between a print head 1 and a carrier 3, and the print head 1 is mounted on the carrier 3 with the heat conductive material 2 inserted between the print head 1 and the carrier 3. Therefore, the amount of heat transferred from the print head 1 to the carrier 3 increases compared with former devices and much heat is taken away from the print head 1 in addition to the amount of heat released into the atmosphere, so that a restraint effect of temperature rise of the head 1 can be expected. When the heat conductive material 2 is made of elastic material, the effect of changes in size due to thermal expansion at high temperature can be also avoided.

4. 发明专利

JPH0462176A CONTROL SYSTEM FOR PRINTER 失效
公开(公告)号：JPH0462176A
公开(公告)日：1992-02-27
申请号：JP16666490
申请日：1990-06-27
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： SATO KENICHI , OMORI MASAYUKI , YONETANI YUTAKA , OKADA SEIJI , WATABE TOSHIO
IPC分类号： B41J11/20 , B41J25/308
摘要： PURPOSE:To prevent damage of a platen, and to improve a printing quality by slightly rotating a platen at each sheet when a sheet is fed from an automatic sheet feeding mechanism, automatically regulating a gap, and rotating it once at a predetermined revolution. CONSTITUTION:A sheet 16 is fed by an automatic sheet feeding mechanism 1, and predetermined sentence is printed. After printing is finished, a motor 6 is rotated to discharge the sheet 16 from a conveying passage 2. Then, a motor 10 is rotated by a predetermined small amount to rotate a platen 8 by a small revolution. When a next sheet 16 is fed by the mechanism 1 and printed, an automatic gap regulating mechanism 15 does not operate before the number of printing sheet reach a predetermined amount, it is held so as not to alter the angle of a support rail 12, and printing is conducted. If the platen 10 reaches a predetermined number of revolution so that the accumulation of small rotation of the platen 8 becomes smaller than 180 degrees, the mechanism 15 again operates to regulate a gap between the platen 8 and a printing head 7 so as to become a suitable value corresponding to the thickness of the sheet 16.

5. 发明专利

JPH03284565A PAPER FEEDER 失效
公开(公告)号：JPH03284565A
公开(公告)日：1991-12-16
申请号：JP8077390
申请日：1990-03-30
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： SATO KENICHI , WATABE TOSHIO , NEMOTO IKUO , OKADA SEIJI
IPC分类号： B65H3/06 , B65H7/18
摘要： PURPOSE:To decrease probability of delivery operation in a pickup part so as to improve reliability by providing a control means which repeats the delivery operation to a fixed number of times in the case of a paper detecting sensor not detecting paper. CONSTITUTION:Paper 4, provided in a conveying part 7, is detected by a paper detecting sensor 10. Accordingly, after delivery operation is finished, the paper is confirmed normally delivered. Reversely, the case, that the paper 4 is not provided or the delivery operation is failed, is confirmed, after the delivery operation is finished, by this paper detecting sensor 10 not detecting the paper 4. Next, the delivery operation by conveying rollers 8, 9 is repeated by acontrol means 11 in the case of this paper detecting sensor 10 not detecting the paper. Accordingly, probability of the delivery operation failed can be decreased.

6. 发明专利

JPH02310074A PAPER PRESSER IN PRINTER 失效
公开(公告)号：JPH02310074A
公开(公告)日：1990-12-25
申请号：JP13136889
申请日：1989-05-26
申请人： HITACHI LTD
发明人： UENO AKIO , WATABE TOSHIO , KANEKO HIROSHI
IPC分类号： B41J3/54 , B41J13/10 , B41J15/04 , B65H20/00 , B65H23/28
摘要： PURPOSE:To prevent a presser plate from being broken or deformed even if paper is pulled forward, for example, to eliminate the jamming of continuous paper by a method wherein the top end of the presser plate is shaped to be bent at some angle, and the presser plate is displaced oppositely to a platen by an external force for pulling the paper. CONSTITUTION:A plate 8 depressing continuous paper 2 against a platen 6 is provided with a surface 8a bent from the contact part with the platen 6 rearward of a printer at some angle, thereby engaging with a perforation line 9 of paper. In this manner, if an external force in a paper pulling direction shown by an arrow A is generated, a component force to rotate the presser plate in a direction of an arrow C acts on the surface 8a, thus preventing the displacement of the presser plate toward the platen causing the deformation or breakage, as shown in a prior art. In addition, the presser plate is provided with a surface 8b forming a triangle, thereby being improved in regidity and strength. Furthermore, if a cutform is slacked and loaded on the surface 8b, the cutform is never caught by the tip end of the presser plate but inserted between a head and the platen without troubles.

7. 发明专利

JPH01275174A FRAME STRUCTURE FOR PRINTER 失效
公开(公告)号：JPH01275174A
公开(公告)日：1989-11-02
申请号：JP10394388
申请日：1988-04-28
申请人： HITACHI LTD
发明人： UENO AKIO , IKEMURA TOSHIRO , SATO KENICHI , WATABE TOSHIO
IPC分类号： B41J29/02
摘要： PURPOSE:To reduce in size and to improve productivity by forming a mechanical frame to right and left separation pieces, disposing a joint bar for connecting the right and left pieces to form a well structure with a bottom frame. CONSTITUTION:Protrusions 11a-11d to be engaged with the connection holes 10a-10d of a bottom frame are provided in mechanical frames 6a, 6b, and the bottom frame is connected to the mechanical frame by threaded holes 13a-13d and holes 14a-14d. Engaging holes 15a-15d are formed at the left and right frames 6a, 6b, protrusions 16a-16d are formed at a joint bar 9, and the threaded holes are connected by a screw 17. Thus, since the left and right frames are connected by the bar, the left and right frames can be easily positioned and centered, and a whole structure with the bottom frame becomes in a well structure.

8. 发明专利

JPS60152001A RESISTOR UNIT 失效
公开(公告)号：JPS60152001A
公开(公告)日：1985-08-10
申请号：JP718884
申请日：1984-01-20
申请人： HITACHI LTD
发明人： WATABE TOSHIO , SAITOU KIYOSHI
IPC分类号： H01C1/016 , H01C1/084 , H01C3/10

9. 发明专利

JPS649773A PRINTER 失效
公开(公告)号：JPS649773A
公开(公告)日：1989-01-13
申请号：JP16536087
申请日：1987-07-03
申请人： HITACHI LTD
发明人： WATABE TOSHIO , UENO AKIO
IPC分类号： B41J11/26 , B41J29/00 , B41J29/12 , B41J29/13
摘要： PURPOSE:To simplify maintenance services by providing a constitution wherein a tractor is supported with a cover and a printed circuit board is shielded against the exterior using said cover. CONSTITUTION:Continuous paper is discharged outside a printer from a transport channel on the left 3 through the transport channel on the right 3, passing between a printing part 1 and a platen 2. A cover 5 is integrally fitted to a main body of the printer by fixing a tractor to the frame 10 of the main body of the printer with a screw 11. The cover 5 supports the tractor, and also shields a printed circuit board 6 provided at the inner bottom the main body of the printer against the exterior with upper and lower side plates 5a, 5b. The cover 5 is removed from the frame 10 with the tractor 4 by taking off an external frame 13 and then undoing the screw 11. Therefore, the printed circuit board 6 can be pulled out thereafter. Consequently, it is simple to remove the printed circuit board 6 and not necessary to separate the tractor 4 from the cover 5 at the time of checking the printed circuit board 6. Furthermore, the number of parts required is reduced, so that maintenance becomes easy.

10. 发明专利

JPS62294572A PRINTER 失效
公开(公告)号：JPS62294572A
公开(公告)日：1987-12-22
申请号：JP13809086
申请日：1986-06-16
申请人： HITACHI LTD
发明人： UENO AKIO , SATO KENICHI , WATABE TOSHIO
IPC分类号： B41J15/04 , B41J13/10 , B65H23/28
摘要： PURPOSE:To provide a printer excellent in both of the setting operability of a slip and that of continuous paper, by revolving a guide plate in connection with the movement of a printing head to guide the continuous paper in a direction winding said paper around a platen in a state protruding from a paper guide. CONSTITUTION:When a printing head 1 is moved from a y-position being a home position to an x-direction, a striker 22 is engaged with an opening and closing link 19 and a connection plate 17 is moved in the direction shown by an arrow B against the energizing force of a spring 20 to bring guide plates 13, 14 to an open state right-angled to a platen shaft. When continuous paper 24 is fed in this state, the leading end of the continuous paper 24 impinges against the guide plates 13, 14 to be guided between paper guides 7, 8 and is guided by a tractor 10. When the printing head 1 is moved from the x-position to the y-position, a printing start possible state is automatically obtained by the operation of (p) and, at the same time, the striker 22 is separated from the link 19 to be revolved in a counterclockwise direction and the guide plates 13, 14 are brought to a closed state to make it possible to apply printing to a slip 25 in such a state that the continuous paper 24 is set to a platen 22.

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