EP0039976A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A device for the transfer of articles to be machined on machine tools from one work station to the next one
Assignee: Nedschroef Octrooi Maatschappij NV
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Filing: 1981-04-08
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Granted: —
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Expires: 2001-04-08
Abstract
Abstract A device for the transfer of articles to be machined from one work station to the next one, said device consisting of a reciprocable carriage, at least one gripping unit, which is mounted at a fixed location on the carriage and which is provided with a pair of levers, movable relative to each other, with the gripper jaw at the one end and a control member at the other end and located therebetween a fixed pivotal axis for the lever on the carriage, said control member being in engagement with a driving member which is adapted to be driven by a piston-cylinder unit and with which the levers are movable in the one direction, as well as with one or more resilient elements which continuously tend to push the levers in the other direction. The device according to the invention is characterized in that the piston-cylinder unit is connected via an electromagnetically operable valve, to a pressurized air feed conduit and that by means of a freely movable quick relieve valve, the piston-cylinder unit is connected to a discharge conduit, debouching into the ambient air.
Inventors
- 👤 Johannes Ernest Bouwman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 04:52
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/149; B; B23; B23Q; B23Q7/00; B23Q7/04; F15B15/1423; F15B15/1433
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
197 words
A device for the transfer of articles to be machined on machine tools from one work station to the next one, said device consisting of a reciprocable carriage, at least one gripping unit, which is mounted at a fixed location on the carriage and which is provided with a pair of levers, movable relative to each other, with a gripper jaw at the one end and a control member at the other end and located therebetween a fixed pivotal axis for the lever on the carriage, said control member being in engagement with a driving member which is adapted to be driven by a piston-cylinder unit and with which the levers are movable in the one direction, as well as with one or more resilient elements which continuously tend to push the levers in the other direction, characterized in that the piston-cylinder unit (51) is connected, via an electromagnetically operable valve (53, 53', 59), to a pressurized air feed conduit (61, 60, 59, 58, 64, 62, 68) and that by means of a freely movable quick relieve valve (63), the piston-cylinder unit is connected to a discharge conduit (68, 62, 70, 71), debouching into the ambient air.
Claim 2
Independent Claim
197 words
A device for the transfer of articles to be machined on machine tools from one work station to the next one, said device consisting of a reciprocable carriage, at least one gripping unit, which is mounted at a fixed location on the carriage and which is provided with a pair of levers, movable relative to each other, with a gripper jaw at the one end and a control member at the other end and located therebetween a fixed pivotal axis for the lever on the carriage, said control member being in engagement with a driving member which is adapted to be driven by a piston-cylinder unit and with which the levers are movable in the one direction, as well as with one or more resilient elements which continuously tend to push the levers in the other direction, characterized in that the piston-cylinder unit (51) is connected, via an electromagnetically operable valve (53, 53', 59), to a pressurized air feed conduit (61, 60, 59, 58, 64, 62, 68) and that by means of a freely movable quick relieve valve (63), the piston-cylinder unit is connected to a discharge conduit (68, 62, 70, 71), debouching into the ambient air.
Claim 3
Dependent Claim
95 words
Device according to claim 1, characterized in that the quick relieve valve (63) is arranged in the feed conduit (64, 62, 68) of the pressurized air from the valve (53, 53') to the piston cylinder unit (51) and closes the discharge conduit (69, 70) when the valve is opened, according to which operation the section (62, 68) of the feed conduit between the piston-cylinder unit (51) and the quick relieve valve (63) serves as a discharge conduit (68, 62) when the quick relieve valve is opened and the feed conduit (61, 60, 64) is closed.
Claim 4
Dependent Claim
110 words
Device according to claim 1 or 2, characterized in that the quick relieve valve is formed as a check valve (63), which check valve cooperates, when the electromagnetic valve (53, 53', 59) is opened, with a seat (69) in the discharge conduit (68, 62, 69, 70) and when the electromagnetic valve is closed, it closes the pressurized air feed conduit (58, 64) towards the cylinder space (51') and that the cylinder space (51") at the other side of the piston (72) is constantly connected (80, 79) to a source of air under a relatively low pressure, which returns the piston (72) of the piston-cylinder unit (51) into the top position.
Claim 5
Dependent Claim
66 words
A device according to claim 3, characterized in that the check valve consists of a disc-like valve body (63) and is provided with a skirt of deformable material, which cooperates, when the pressurized air feed conduit (58, 64) is closed, with the inner wall of a chamber (62) in the discharge conduit (68, 62, 70) and the pressurized air feed conduit (58, 64, 62, 68) respectively.
Claim 6
Dependent Claim
26 words
A device according to claim 4, characterized in that the check valve (63) is made of nylon and is provided with a relatively thin circumferential lip.
Claim 7
Dependent Claim
157 words
Device according to claim 1, characterized in that the gripper levers (27) of each gripper unit (10A, 10B, 10C, 10D) each have their own pivotal axis (22) and are movable into the open position against spring force, that the control member consists of a freely rotatable roller (24) on an arm (23), which is rotatably journalled on the pivotal axis (22) and adjustably connected to the arm (27') of the gripper lever (27) facing away from the gripper jaw (28), and that the driving member consists of a double cam (15) which is mounted on the one end of a shaft (14) on the carriage (1), on which axis at the other end an arm (16) is mounted, which is provided at its free end with a freely rotatable roller (17) which cooperates by means of a spring (21), which engages the arm, with a shoe (20) on the piston rod (74) of the piston-cylinder unit (51).
Claim 8
Dependent Claim
50 words
A device according to claim 6, characterized in that the spring force on the gripper lever (27) is exerted by a torsion spring (31) which is mounted on the pivotal shaft (22) of the lever and that the spring force is controllable by means of an adjusting member (32, 33).
Claim 9
Dependent Claim
25 words
Device according to claim 7, characterized in that the adjusting member consists of a disc (32) which is adjustable by means of a bolt (33).
Claim 10
Dependent Claim
76 words
A device according to claim 1, characterized in that at least one control unit (43) consisting of an electromagnetic valve (53), a check valve (63) and a piston-cylinder unit (51) is mounted in an integrally formed frame (44, 45), which is mounted pivotally (47, 50) in a vertical plane on the frame (1) of the device and that the frame (44, 45) is lockable in the operative position with the aid of a clamping device (48,49).
Claim 11
Independent Claim
32 words
A device for the transfer of articles to be machined on machine tools from one work station to the next one, substantially as described in the specification and/or illustrated in the drawings.
Claim 12
Independent Claim
32 words
A device for the transfer of articles to be machined on machine tools from one work station to the next one, substantially as described in the specification and/or illustrated in the drawings.
References Cited (Backward Citations)
No citation records indexed.
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