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1. 发明专利

JP2002028745A RIVETING DEVICE 失效
公开(公告)号：JP2002028745A
公开(公告)日：2002-01-29
申请号：JP2000208584
申请日：2000-07-10
申请人： MITSUBISHI HEAVY IND LTD , NISSHIN SPINNING
发明人： HARADA MASUO , KATAYAMA KOJI , NAKAGAWA MASAO
IPC分类号： B21J15/10 , B21J15/14 , B21J15/38
摘要： PROBLEM TO BE SOLVED: To provide a riveting device which can dispense with any special work positioning jig, automatically realize the riveting work by a compact device at a low cost using a relatively simple control system, reduce man-hours, and attain the stable product quality. SOLUTION: This device for riveting a plurality of plates comprises: a guide member having a guide part which is fixed to a body frame, has a shape copying the surface shape of the plates and is extended substantially in the perpendicular direction, in particular, the guide part capable of moving a work head unit along a curved surface of the plates and formed in an arc shape; and a work head unit which is fitted to the guide member movably along the guide part and provided with a riveting appliance for performing riveting.

2. 发明专利

JPH09108765A HYDRAULIC PRESS MACHINE 失效
公开(公告)号：JPH09108765A
公开(公告)日：1997-04-28
申请号：JP29747495
申请日：1995-10-19
申请人： NISSHIN SPINNING
发明人： NAKAGAWA MASAO
IPC分类号： B21J9/12 , B30B1/32 , B30B15/04
摘要： PROBLEM TO BE SOLVED: To make a hydraulic press machine used for cold forging, etc., light weight, compact and a structure enduring eccentric load. SOLUTION: A cylinder tube 20 is fixed on a frame 22 having roughly equal width with a bolt 23. A rod part 26 connecting to a cylindrical shape head part 24 of a piston 21 is made to a polygonal shape having a small diameter than the head part 24, an upper die 11 is mounted on a lower end face 27, facing side faces 28, 28 are made to a guide face. A slide 30 is arranged to the opening upper edge of the frame 22 and a lower die 12 is mounted on the bottom face. The piston 21 is slided downward with hydraulic pressure of a pressurizing chamber 14, a stock is press worked between the upper die 11 and lower die 12. Even when eccentric load is generated, the load is supported by sliding between the slide 30 and guide face 28, the piston 21 is precisely guided. A pressure force is transmitted to the cylinder tube 29 through the upper die 11, lower die 12, frame 22 and balanced with the upward force in the pressurizing chamber 14.

3. 发明专利

JPH08267310A PIPE CUTTING DEVICE 失效
公开(公告)号：JPH08267310A
公开(公告)日：1996-10-15
申请号：JP10023995
申请日：1995-03-30
申请人： NISSHIN SPINNING
发明人： NAKAGAWA MASAO
IPC分类号： B23D21/00
摘要： PURPOSE: To cut a pipe by means of press working and to enable scrapless working. CONSTITUTION: A pair of internal supporting members consisting of a rod 6 and a sleeve 7 are inserted into a pipe 1 serving as a cut material, thereby having them opposed at a cutting position X. Force 4 and force 5 are imposed thereon along the axial direction so as to make the rod 6 pull from the sleeve 7, and then a taper-form part 7a of the sleeve 7 installed with a slit 9 is expanded with by a tip part 6a of the rod 6. With this, the taper-form part 7a of the sleeve 7 is strongly contacted with an inner surface of the pipe 1. In this state intact, when press pressurizing force F1 to the imposed on an upper blade 2 is heightened, insomuch that it overcomes an extent of lower support force F2, the pipe 1 is cut off, and thus the pipe 1 is cut by the press working without being crushed, owing to an inner supporting member being inserted as a bush.

4. 发明专利

JP2540450B2 失效
公开(公告)号：JP2540450B2
公开(公告)日：1996-10-02
申请号：JP21529094
申请日：1994-08-17
申请人： NISSHIN SPINNING
发明人： NAKAGAWA MASAO
IPC分类号： B30B15/04 , B30B15/06

5. 发明专利

JPH08168822A HYDRAULIC PRESS DEVICE 失效
公开(公告)号：JPH08168822A
公开(公告)日：1996-07-02
申请号：JP33420494
申请日：1994-12-16
申请人： NISSHIN SPINNING
发明人： NAKAGAWA MASAO
IPC分类号： B21D5/02 , B30B1/32 , B30B15/04
摘要： PURPOSE: To make a hydraulic press device to be used for a press brake, etc., a simple device with high reliability, easy to enhance accuracy, and inexpensive with satisfactory maintenance and operability. CONSTITUTION: A frame is constituted by framing and welding plural square pipes 20, and by filling concrete in the square pipes. The lower end of a piston 25 is fixed on the supporting part 26 of a lower frame 23. A hydraulic cylinder elevating, lowering and driving a ram 28, is constituted of plural spaces 29 in the ram 28, a pistons 25 composing a pressure chamber A by fitting in the spaces 29, and a cap sealing the entrances of the spaces 29, etc. The ram 28 is also used as a cylinder tube. Center penetrating at the time of the application of a pressure is corrected by concentrating the hydraulic cylinder in the center of the ram 28. For the supply and the discharge operations of a hydraulic pressure to and from the inside of the pressure chamber A, a worker performs open and close operations actually by his foot by using a pedal system hydraulic manual valve 33 connected in the midst of a hydraulic piping 10.

6. 发明专利

JPH08155684A DOUBLE-ACTING HYDRAULIC CYLINDER 失效
公开(公告)号：JPH08155684A
公开(公告)日：1996-06-18
申请号：JP30085394
申请日：1994-12-05
申请人： NISSHIN SPINNING
发明人： NAKAGAWA MASAO
IPC分类号： F15B15/14 , B30B1/34
摘要： PURPOSE: To provide a double-acting hydraulic cylinder for a press at a low cost which features a small number of parts, capability of miniaturization, easy maintenance and little shock. CONSTITUTION: A space 3a for the operation of a piston 12 with a small diameter is provided inside a piston 3 with a large diameter in a main cylinder 2, a space opening to the outside end of the piston 3; and the piston 12 with a small diameter is inserted into this space 3a. A spring 13 and a cap 14 are provided which determines the position of this piston 12 with a small diameter at the time of no load; and also a passage 16 is provided by which the pressure chamber A of the main cylinder 2 communicates with the pressure chamber B of the piston 12 with a small diameter.

7. 发明专利

JPH08105570A PREFILL VALVE AND HYDRAULIC PRESS DEVICE USING PREFILL VALVE 失效
公开(公告)号：JPH08105570A
公开(公告)日：1996-04-23
申请号：JP27049094
申请日：1994-10-07
申请人： NISSHIN SPINNING
发明人： NAKAGAWA MASAO
IPC分类号： F16K31/122 , B30B15/16
摘要： PURPOSE: To realize a high speed operation and an automatic conversion of the operation at low cost by simplify the structure of a prefill valve. CONSTITUTION: The piston 42 of a prefill valve 40 is composed of a hollow shaft form member 47, and a flange 48 penetrating to the center of the shaft form member 47, and holes 50a and 50b communicating to a passage F in the hollow are formed near the end of the shaft form member 47. A valve box is provided with an exhaust hole 52 connecting to a tank, and a connecting hole 53 connecting to a pump. In the valve chamber 51 in the valve box, the piston 42 is housed slidable by cutting off between the exhaust hole 5 and the connecting hole 53 by the flange 48. One end of the piston 42 is inserted in an opening 49 connecting to the cylinder of a press device, and the other end is inserted in the housing 45 of a spring 46 for energizing. The piston 42 is moved sliding by a hydraulic pressure applied to the connecting hole 53, and the cylinder, the subcylinder, and the pump of the press device are communicated or cut off by the positions of the holes 50a and 50b.

8. 发明专利

JPH0857700A HYDRAULIC PRESSING APPARATUS 失效
公开(公告)号：JPH0857700A
公开(公告)日：1996-03-05
申请号：JP21529194
申请日：1994-08-17
申请人： NISSHIN SPINNING
发明人： NAKAGAWA MASAO
IPC分类号： B30B15/16
摘要： PURPOSE: To provide a hydraulic pressing apparatus which realizes the movement without waste, as the same way as a servo valve by using a solenoid valve in a low cost and can operate in high speed. CONSTITUTION: This hydraulic pressing apparatus is provided with a stroke limiting device composed of a ring 31 fixed to a piston 22 for driving a die upward/downward, a stopper 32 possible to engage/disengage with the ring 31 and an air cylinder 33 for driving the stopper 32 in the direction attached/ detached to the piston 22. The fitting hole 42 of the stopper 32 is fitted with the outer periphery of an air cylinder 22, and the ascending end position and descending end position of the piston 22 are regulated by hitting the cushion 43 against the ring 31 at the time of ascending with the air cylinder 33.

9. 发明专利

JPH0691400A HYDRAULIC PRESS DIRECTLY DRIVING TIE ROD PART 失效
公开(公告)号：JPH0691400A
公开(公告)日：1994-04-05
申请号：JP26912392
申请日：1992-09-14
申请人： NISSHIN SPINNING
发明人： NAKAGAWA MASAO
IPC分类号： B30B1/32 , B30B15/04 , B30B15/24
摘要： PURPOSE:To always applying a parallel force on a tie rod and to perform smooth pressing by providing a hydraulic cylinder fitted with a ring-shape piston having outer circumferential face of the tie rod as the guiding face around the tie rod. CONSTITUTION:Each tie rod 4 fixed with an upper plate 1 and a lower plate 2 and fitted with a slidable ram 3 between the upper and lower plates is provided. The hydraulic cylinder fitted with the ring-shape piston 12 having the outer circumferential face of the tie rod as the guiding face around the tie rod is provided on the lower face of the upper plate 1 or on the upper face of the lower plate 2. Thus, smooth pressing is performed even when the ram 3 is applied with an offset load and, when the offset load is especially high, the tie rod is always applied with a parallel force by controlling the pressure of fluid in the hydraulic cylinder. Tilting of the ram 3 is not caused by the offset load is, the higher rigidity to the offset load is obtained and highly accurate pressing is carried out.

10. 发明专利

JPH0952197A HYDRAULIC PRESSURE PRESS DEVICE 失效
公开(公告)号：JPH0952197A
公开(公告)日：1997-02-25
申请号：JP22970395
申请日：1995-08-14
申请人： NISSHIN SPINNING
发明人： NAKAGAWA MASAO
IPC分类号： B21J9/12 , B21J13/02 , B30B1/32
摘要： PROBLEM TO BE SOLVED: To make a hydraulic pressure press equipment used for cold forging, etc., light weight, low cost, compact and strong structure to offset load. SOLUTION: A piston 21 is provided with three piston rods 22 and protruded through a ceiling face part 23 of cylinder tube 20 and upward. A die mounting plate 24 is connected/fixed to the tip of piston rod 22. A lower die 12 is arranged at the top face of ceiling face part 23 of cylinder 20 and an upper die 11 at the rear face of the die mounting plate 24. A fluid chamber 26 of the side of piston rod 22 of cylinder tube 20 is used for a main pressurizing chamber. When the piston 21 is descended with hydraulic pressure introduced into the fluid chamber 26 the piston rot 22, the die mounting plate 24 and upper die 11 are descended along with the piston, pressure force is applied to a work held between the lower die 12 and upper die 11, press work is executed.

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