WO1998033706A1 - Vorrichtung und verfahren zum verschrauben von gewindestopfen in gewindeflansche - Google Patents
Vorrichtung und verfahren zum verschrauben von gewindestopfen in gewindeflansche Download PDFInfo
- Publication number
- WO1998033706A1 WO1998033706A1 PCT/DE1998/000312 DE9800312W WO9833706A1 WO 1998033706 A1 WO1998033706 A1 WO 1998033706A1 DE 9800312 W DE9800312 W DE 9800312W WO 9833706 A1 WO9833706 A1 WO 9833706A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- threaded
- flange
- threaded flange
- centering
- holding
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B7/00—Closing containers or receptacles after filling
- B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
- B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
- B65B7/2828—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers inserting and rotating screw stoppers
Definitions
- the invention relates to a method and an apparatus for screwing threaded plugs into threaded flanges, which are preferably provided on containers, with a feed device for the storage and supply of threaded plugs, an actively actuated receiving and holding device for the threaded plugs, an actively actuated Device for positioning the holding and holding device and the threaded flange of the container to each other, as well as a rotating device for screwing the threaded plug into the threaded flange with the possibility of changing the direction of rotation and torque monitoring.
- Devices of the aforementioned type serve e.g. For screwing steel drums and similar containers in which a sealing plug with an external or internal thread is inserted mechanically into a sealing opening.
- the problem with these containers is that, due to manufacturing deviations, threaded plugs and bung openings or threaded flanges can often not be positioned coaxially, and cannot be positioned at a correct angle for a mechanical screwing process, so that adequate security cannot be guaranteed when screwing mechanically.
- the positioning or centering processes with which the threaded plugs are aligned relative to the threaded flanges are insufficient.
- axial, radial and angular adjustments relative to the bung opening are carried out by hand or have to be monitored manually.
- the threaded plugs are usually screwed into the individual bung openings by means of a screw chisel which, in order to accommodate the threaded plugs, usually has to be prepositioned by sensors or mechanically.
- an automatic screwing device can be found in DE 35 29 773 C2, which has a centering ring 10 in which a screwing tool 11 is arranged to be axially displaceable and which engages in a form-fitting manner in order to accommodate a cover closure.
- a centering ring 10 in which a screwing tool 11 is arranged to be axially displaceable and which engages in a form-fitting manner in order to accommodate a cover closure.
- the threaded flange attached to a sheet pile container must be exactly pre-positioned relative to the centering ring 10.
- the entire device shown in FIG. 1 is aligned relative to a bung hole. Shift cylinders are provided for this positioning, by means of which the device is aligned relative to the bunghole.
- the exact centering of the centering ring 10 with respect to the The bung hole to be closed is made in such a way that the conical centering surface 33 provided in the interior of the centering ring 10 is lowered onto the bung hole, as a result of which the device fastened to a support frame 1 is aligned exactly centrally above the bung hole in a horizontal plane.
- the centering is therefore done by simply mechanically sliding a conical centering surface onto the threaded flange of a bung hole. After centering, the lid lock is placed in the bung hole with subsequent twisting.
- the known device assumes that the bung holes to be closed must be made available to the screwing device in a pre-positioned manner. Without such prepositioning, the centering process described above could not be carried out by simply lowering the centering ring 10 against the bung hole.
- each differently shaped lid closure requires an individually designed centering ring which is adapted to the outer contour of the lid closure.
- a barrel centering device can be found in DE 33 01 188 A1, with which a basic positioning of a bung opening relative to a barrel treatment station is possible, but the positioning is carried out separately in time before a subsequent treatment of the bung hole.
- the gripping head 10 of the positioning device no longer encompasses the bung opening during the filling or screwing of a lid closure onto a bung plug, as a result of which the bung plug is not actively centered relative to a screwing device, for example.
- Such a procedure inevitably leads to canting and self-locking, which interrupt an automatic process.
- the invention has for its object to develop a method and an apparatus for screwing threaded plugs in threaded flanges, which are preferably provided on containers, such that, despite existing manufacturing tolerances, a fully automatic positioning and centering of the threaded plug relative to the threaded flange can be carried out without any Damage threaded parts or cause system malfunctions.
- the screwing process should be secure against canting and self-locking, which can occur when fitting and screwing in lid closures on bung openings.
- Claim 1 relates to a device, claim 9 to a corresponding method.
- Features advantageously forming the inventive concept are the subject of the dependent claims.
- the invention is based on the idea of screwing containers with bung openings fully automatically with a screwing device according to the invention, containers and threaded plugs being able to be actively aligned with one another in all possible degrees of freedom. After appropriate positioning and centering, the axial relative assignment should be maintained during the insertion process of the threaded plug into the threaded flange, so that only a movement of the threaded plug relative to the threaded flange axis takes place.
- a device for screwing threaded plugs into threaded flanges which are preferably provided on containers, with a Feeding device for the storage and feeding of threaded plugs, an actively actuated receiving and holding device for the threaded plugs, an actively actuated centering device for positioning the holding and holding device relative to the threaded flange of the container and a rotating device for screwing the threaded plug into the threaded flange
- the centering unit has a centering gripper which can be positioned on the threaded flange and is designed in such a way that the centering gripper firmly grips the threaded flange so that the receiving and holding device is movably mounted in the axial, radial and angular orientation relative to the threaded flange axis, it preferably being is aligned by the centering gripper and can be positioned relative to the threaded flange and that the rotating device axially introduces the threaded plug into the threaded
- the centering device designed as a gripper jaw, which is directly kinematically connected to the receiving and holding device for the threaded plugs, is used according to the invention in such a way that the gripping jaws actively grasp the threaded flange and positions it relative to the receiving and holding device.
- the gripper jaws of the centering device remain connected to the threaded flange over the entire twisting process, so that when possible canting occurs, the threaded flange can be re-centered relative to the cover to be attached.
- the receptacle on the outside of the threaded plug ensures that the receiving and holding device grips the threaded plug centrally so that the threaded plug is placed and rotated centrally on the threaded flange.
- the centering gripper which is preferably designed as a parallel jaw gripper, grips the threaded flange of the container, so that the container may also be included Support a transmission unit can be centered and positioned.
- a receiving and holding device which is automatically supplied with threaded plugs by means of a feed device, is also centered and positioned relative to the now spatially fixed threaded flange.
- the receiving and holding device is self-centering in relation to the container opening.
- the receiving and holding device has axial and angle compensation units.
- the threaded plugs supplied and separated by the feed device are preferably held by the holding and holding device by means of a pneumatic gripper.
- the control of the gripper can also follow it electrically or mechanically.
- pneumatic energy is usually introduced in the form of excess pressure, by means of an exhaust and supply air line via rotary transducers and a hollow shaft which leads to the gripper part.
- the full active alignment of the containers with the threaded flanges to be closed relative to the threaded plugs which are provided in the device according to the invention by means of a holding and holding device, prevents malfunctions such as tilting of the threaded plugs when they are attached to the threaded flange. Furthermore, the joining process can be actively monitored via sensors on the movable device parts.
- a container 2 is roughly pre-positioned within a conventional production line such that the threaded flange 3 located on the top of the container 2 is roughly aligned relative to the device 1 according to the invention.
- the device according to the invention is preferably attached to a vertically movable linear unit or to a robot 4, so that it can be moved axially relative to the vertical alignment.
- the threaded plugs 6 of the device 1 according to the invention which are required for closing the bung openings of the containers 2, are offered individually via a feed device 5, which can also be moved with linear units or a lifting / swiveling unit.
- the feed device 5 can be controlled via a vertically movable linear cylinder 7 and a horizontally movable linear cylinder 8.
- the feed device 5 designed as a lifting swivel unit is preferably supplied with compressed air via pneumatic feed lines for the controlled adjustment of the linear cylinders (not shown).
- the device To receive the threaded plugs 6 offered individually by the feed device 5, the device according to the invention provides a holding and holding device 8, at the lower end of which a plug holding device 9 is attached, which detects the individual threaded plugs 6 on their outer circumference and fixes them firmly by means of a radial gripping force.
- the energy is supplied via pneumatic or electrical lines 11, which are connected to a hollow shaft 10 via a rotary distributor.
- the receiving and holding device also has in its internal structure axial and angle compensation units 12 which align the threaded plug 6 fixed by means of the plug holding device 9 axially to the threaded flange axis A and also radially and angularly to this axis, or pull the container to the device as far as possible or position.
- a centering device 14 is provided which can be moved via a vertical linear guide 13 and which has centering grippers 15 which are designed, for example, as active parallel jaw grippers.
- the centering device moves the centering grippers 15, the gripper jaws of which are in an open state, axially to the outside of the threaded flange 3, which, after appropriate positioning, is firmly enclosed by the centering grippers 15.
- a relative positioning between the device according to the invention and the container 2 is carried out by means of the suspension 14, 13, 12 designed to be flexible in the axial, radial and angular directions. If necessary, the container 2 itself is roughly pre-positioned by means of a linear unit (not shown).
- the receiving and holding device moves with a rotating device 17 connected via rotary transducer 16 only axially in the direction of the threaded flange 3.
- the holding and holding device with attached rotating device 17 holding the threaded plug 6 is moved via the above-mentioned axial and angular compensation units 8 exactly centered relative to the axis of the threaded flange 3.
- the radial and angular orientation of the threaded flange relative to the holding and holding device remains fixed during the vertical lowering.
- the fixed threaded plug 6 is set in rotary movement, the centering gripper 15 remaining axially guided.
- the rotary movements are aligned in such a way that only a defined relative movement can take place between the threaded plug and the threaded flange, which can be precisely controlled, for example, by means of a linear unit, item 4.
- the entire screwing process of the threaded plug into the threaded flange can be checked with the help of a sensory path detection.
- the screwing-in process is carried out again.
- the measurement of the motor current is used, which is required by the motor-driven rotating device 17 during the screwing-in process.
- the torque to be used can be determined via the detection of the motor current, by means of which, for example, tilting or the complete screwing of the threaded plug can be registered in the threaded mount.
- the screw-in depth can also be detected by means of appropriate sensors with which the threaded plug 6 engages in the threaded socket 3.
- the insertion movement of the threaded plug into the threaded socket 3 takes place via the linear unit 4, which is driven depending on the pitch and the screwing speed.
- the entire device according to the invention moves vertically upwards, the centering grippers 15 opening and leaving the threaded flange 3 free.
- the rotating device 17 is connected to the movably suspended receiving and holding device and can be centered with it.
- the rotating device 17 can also be fixedly attached to an upper part of the device which is not to be aligned.
- the alignment movement is compensated for by a spring-loaded power transmission belt that only transmits torque.
- spring elements F can optionally be provided between the fixed base plate B, which is connected to the robot 4, and the carrier plate C for receiving the screw-in drive. These are preferably four springs F (only two of which are shown), which are attached to the fixed base plate B at their four corners. Between the base plate B and the carrier plate C lies in the axial, Radial and angular direction flexible compensation unit 12. The following advantages are achieved by the provision of the springs F:
- the spring force compensates for the weight of the screw unit, which means that the screw unit adapts more easily to the existing position of the threaded flange, since only a very small force is required to deflect the compensation unit via the centering gripper,
- the spring elements F After screwing a stopper into a threaded flange, the spring elements F return the screwing unit to a defined starting position when the centering gripper is opened, which supports the fully automatic process.
- a sensor can be provided on the centering gripper in such a way that the sensor detects the container height when the centering gripper is placed on the container and triggers the closing and screwing-in process.
- Another sensor which detects the relative distance between the centering and screw-in grippers, can detect the end of the screwing-in process and initiate the opening of the grippers and the recall of the linear unit.
- the axial and angular compensation unit 12 ensures a certain flexibility between the lowering speed of the linear unit 4 and the lowering speed resulting from the number of revolutions of the screw-in gripper while the thread of the plug increases. Without this compensation, the screw-in unit would jam and a complex, heavy and expensive forced coupling between the linear unit and the rotary drive for the screw-in gripper would have to be realized.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Of Jars (AREA)
- Specific Conveyance Elements (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98909331A EP0892737A1 (de) | 1997-02-04 | 1998-02-04 | Vorrichtung und verfahren zum verschrauben von gewindestopfen in gewindeflansche |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997104104 DE19704104C2 (de) | 1997-02-04 | 1997-02-04 | Vorrichtung und Verfahren zum Verschrauben von Gewindestopfen in Gewindeflansche |
DE19704104.3 | 1997-02-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998033706A1 true WO1998033706A1 (de) | 1998-08-06 |
Family
ID=7819236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/000312 WO1998033706A1 (de) | 1997-02-04 | 1998-02-04 | Vorrichtung und verfahren zum verschrauben von gewindestopfen in gewindeflansche |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0892737A1 (de) |
CA (1) | CA2251103A1 (de) |
DE (1) | DE19704104C2 (de) |
WO (1) | WO1998033706A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10807744B1 (en) * | 2018-11-14 | 2020-10-20 | Specialty Equipment Fabrication Company | Apparatus, systems and methods for manipulating a drum or other container |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2731185A (en) * | 1952-10-31 | 1956-01-17 | California Research Corp | Cap fastener |
DE3529773A1 (de) * | 1985-08-20 | 1987-03-05 | Siegfried Heyng | Schraubvorrichtung zum anschrauben von verschlussdeckeln an spundloechern von faessern |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2983089A (en) * | 1955-08-25 | 1961-05-09 | California Research Corp | Cap fastening machine |
NL6717745A (de) * | 1967-12-28 | 1969-07-01 | ||
GB1359598A (en) * | 1971-03-06 | 1974-07-10 | Ocme Spa | Device for sealing containers having an eccentrically located pouring spout |
DE2540864C3 (de) * | 1975-09-13 | 1979-08-16 | Foerdertechnik Hamburg Harry Laessig, 2000 Hamburg | Vorrichtung zum Anbringen von Schraubverschlüssen an den Spundlöchern von Fässern |
DE3119286C2 (de) * | 1981-05-14 | 1986-12-18 | Grosskreuz, Gerhard, 2000 Hamburg | Stopfeneinschraubgerät für Fässer |
DE3301188A1 (de) * | 1983-01-15 | 1984-07-19 | Feige GmbH, 2000 Hamburg | Fasszentriervorrichtung |
DE3404346A1 (de) * | 1984-02-08 | 1985-08-08 | Feige GmbH, 2000 Hamburg | Schrauber fuer fassschraubdeckel |
DE3715795A1 (de) * | 1987-05-12 | 1988-11-24 | Feige Gmbh | Schrauber fuer spundlochschraubdeckel von faessern |
DE3715935A1 (de) * | 1987-05-13 | 1988-11-24 | Ruchozki Manfred Dipl Ing Fh | Vorrichtung zum aufschrauben der schraubkappen von schraubverschluessen auf behaeltnisse |
DE4217461A1 (de) * | 1992-05-26 | 1993-12-02 | Bausch & Stroebel Maschf | Vorrichtung zum Verschrauben von Gegenständen, insbesondere eines Schraubverschlusses auf einem Behälter |
DE4415227A1 (de) * | 1994-04-30 | 1995-11-02 | Mewes Gmbh | Verfahren zum Aufschrauben von Behälterverschlüssen und Verschraubmaschine hierzu |
-
1997
- 1997-02-04 DE DE1997104104 patent/DE19704104C2/de not_active Expired - Fee Related
-
1998
- 1998-02-04 EP EP98909331A patent/EP0892737A1/de not_active Withdrawn
- 1998-02-04 WO PCT/DE1998/000312 patent/WO1998033706A1/de not_active Application Discontinuation
- 1998-02-04 CA CA 2251103 patent/CA2251103A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2731185A (en) * | 1952-10-31 | 1956-01-17 | California Research Corp | Cap fastener |
DE3529773A1 (de) * | 1985-08-20 | 1987-03-05 | Siegfried Heyng | Schraubvorrichtung zum anschrauben von verschlussdeckeln an spundloechern von faessern |
Also Published As
Publication number | Publication date |
---|---|
DE19704104A1 (de) | 1998-08-06 |
DE19704104C2 (de) | 1999-08-12 |
EP0892737A1 (de) | 1999-01-27 |
CA2251103A1 (en) | 1998-08-06 |
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