Monitoring system for pneumatic core shafts and shaft adapters

Abstract

A monitoring system for pneumatic shafts and pneumatic shaft adapters. A sensor assembly is physically joined in operative engagement with the bladders of pneumatic shafts and adapters. Sensed data is wirelessly transmitted to a remote receiver for processing and display.

Claims

1. A monitoring system for pneumatic core shafts, comprising: a pneumatic core shaft for gripping and holding a core of a wound material roll, comprising: a hollow, cylindrical bearing tube, having a plurality of apertures; an air bladder contained within said bearing tube, said air bladder having an exterior surface and an interior; a pneumatic inflation valve connected to and positioned near a bladder end for inserting and releasing air to and from said bladder interior; a shaft end engaged with a drive coupling means; a sensor aperture formed in said bearing tube and providing an opening to the bladder; a sensor assembly seated within said bearing tube sensor aperture and joined in operative engagement with said bladder interior; wherein said sensor assembly is comprised of a plurality of transducers, a sensor pre-processor, a microprocessor, a wireless transmitter and antenna; an external receiver for receiving data sensed by said transducers and transmitted by said antenna.

2. A system as recited in claim 1, further comprising: a plurality of lugs loosely held and protruding through said bearing tube apertures, wherein said air bladder exterior surface is adapted to push the lug outwardly through said apertures into engagement with the core of said wound material roll.

3. A system as recited in claim 2, wherein: said transducers may be comprised of an air pressure sensor, acceleration sensor, temperature sensor, and battery power level sensor.

4. A system as recited in claim 3, further comprising: a processor connected to said external receiver for stripping said sensed data from a transmitted signal and converting said data to a desired format; a display connected to said processor for presenting said sensed data.

5. A system as recited in claim 4, wherein said processor and display may provide the following control and monitoring features: visual/audible/digital signal alarms when air bladder pressure is outside preprogrammed minimum and maximum limits; visual/audible/digital signal alarms when temperature is outside preprogrammed minimum and maximum limits; internal logic to determine when a shaft has been inflated; resettable counter for number of inflations for a specific shaft; timer to determine total time a shaft has been inflated; visual/audible/digital signal alarm to indicate a preset inflation value has been reached; operating lock until a preset inflation has been reached; visual/audible/digital signal alarm indicating a bladder slow leak; visual/audible/digital signal alarm output indicating a low battery level for sensors with batteries; visual/audible/digital indicators when shaft starts and stops rotating; counter/timer determining number and/or time shaft has been rotating; visual/audible/digital indicator of shaft RPM; and visual/audible/digital signal alarms when shaft RPM is outside programmed ranges.

6. A system as recited in claim 5, wherein: said sensor aperture is formed in said bearing tube in an end opposite to said pneumatic inflation valve.

7. A monitoring system for pneumatic core shafts, comprising: a pneumatic core shaft for gripping and holding a core of a wound material roll, comprising: a hollow, cylindrical bearing tube, having a plurality of longitudinal channels formed within a bearing tube exterior surface, and two, opposite ends; a plurality of air bladders contained within said bearing tube, each said air bladder having an exterior surface and an interior, each air bladder positioned within a bearing tube longitudinal channel. an air manifold near a shaft end interconnected to and distributing air to said air bladder interiors; a pneumatic inflation valve connected to said air manifold and positioned near a core shaft end for inserting and releasing air into said bladder interiors; a shaft end engaged with a drive coupling means; a sensor aperture formed in said bearing tube and providing an opening to said air manifold; a sensor assembly seated within the bearing tube sensor aperture and joined in operative engagement with an air manifold interior; wherein said sensor assembly is comprised of a plurality of transducers, a sensor pre-processor, a microprocessor, a wireless transmitter and antenna; an external receiver for receiving data sensed by said transducers and transmitted by said antenna.

8. A system as recited in claim 7, further comprising: a strip lug loosely held and attached to each bearing tube longitudinal channel above an air bladder wherein inflation of an air bladder through the inflation valve expands the air bladder forcing the strip lug radially outward for enhanced gripping of said core.

9. A system as recited in claim 8, wherein: said transducers may be comprised of an air pressure sensor, acceleration sensor, temperature sensor, and battery power sensor.

10. A system as recited in claim 9, further comprising: a processor connected to said external receiver for stripping said sensed data from a transmitted signal and converting said data to a desired format; a display connected to said processor for presenting said sensed data.

11. A system as recited in claim 10, wherein said processor and display may provide the following control and monitoring features: visual/audible/digital signal alarms when air bladder pressure is outside preprogrammed minimum and maximum limits; visual/audible/digital signal alarms when temperature is outside preprogrammed minimum and maximum limits; internal logic to determine when a shaft has been inflated; resettable counter for number of inflations for a specific shaft; timer to determine total time a shaft has been inflated; visual/audible/digital signal alarm to indicate a preset inflation value has been reached; operating lock until a preset inflation has been reached; visual/audible/digital signal alarm indicating a bladder slow leak; visual/audible/digital signal alarm output indicating a low battery level for sensors with batteries; visual/audible/digital indicators when shaft starts and stops rotating; counter/timer determining number and/or time shaft has been rotating; visual/audible/digital indicator of shaft RPM; and visual/audible/digital signal alarms when shaft RPM is outside programmed ranges.

12. A system as recited in claim 11, wherein: said sensor aperture is positioned at a core shaft end opposite to the pneumatic inflation valve.

13. A monitoring system for pneumatic shaft adapters, comprising: an external bladder shaft adapter for gripping a large core of a wound material roll, comprising: a left and right module, each module having an adapter module main body with two ends; a hollow bore within each adapter module main body; two opposite end caps defining each adapter module main body ends; a clamp collar attached to one end cap of each module for attachment to a shaft; an air bladder about each adapter main body, said air bladder having an exterior surface and an interior, said air bladder exterior surface adapted to expand radially about the adapter to make direct contact with a core; an inflation valve connected to said air bladder for inserting and releasing air from said air bladder interior; a sensor aperture formed in an end cap providing an opening to the air bladder; a sensor assembly seated with said end cap sensor aperture and joined in operative engagement with said air bladder interior; wherein said sensor assembly is comprised of a plurality of transducers, a sensor pre-processor, a microprocessor, a wireless transmitter and antenna; an external receiver for receiving data sensed by said transducers and transmitted by said antenna.

14. A system as recited in claim 13, wherein: said transducers may be comprised of an air pressure sensor, acceleration sensor, temperature sensor, and battery power sensor.

15. A system as recited in claim 14, further comprising: a processor connected to said external receiver for stripping said sensed data from a transmitted signal and converting said data to a desired format; a display connected to said processor for presenting said sensed data.

16. A system as recited in claim 15, wherein said processor and display may provide the following control and monitoring features: visual/audible/digital signal alarms when air bladder pressure is outside preprogrammed minimum and maximum limits; visual/audible/digital signal alarms when temperature is outside preprogrammed minimum and maximum limits; internal logic to determine when a shaft has been inflated; resettable counter for number of inflations for a specific shaft; timer to determine total time a shaft has been inflated; visual/audible/digital signal alarm to indicate a preset inflation value has been reached; operating lock until a preset inflation has been reached; visual/audible/digital signal alarm indicating a bladder slow leak; visual/audible/digital signal alarm output indicating a low battery level for sensors with batteries; visual/audible/digital indicators when shaft starts and stops rotating; counter/timer determining number and/or time shaft has been rotating; visual/audible/digital indicator of shaft RPM; and visual/audible/digital signal alarms when shaft RPM is outside programmed ranges.

17. A system as recited in claim 16, wherein: said sensor aperture is formed in an end cap opposite the inflation valve.

18. A monitoring system for pneumatic shaft adapters, comprising: a strip shaft adapter for gripping a large core of a wound material roll, comprising: a left and right module, each having a hollow, cylindrical bearing tube, with a plurality of longitudinal channels formed within a bearing tube exterior surface, and two, opposite ends; two opposite end caps defining said module bearing tube ends; a clamp collar attached to one end cap of each for attachment to a shaft; a plurality of air bladders contained within said bearing tube, each said air bladder having an exterior surface and an interior, each air bladder positioned within a bearing tube longitudinal channel. an air manifold near both bearing tube ends interconnected to and distributing air to said air bladder interiors; a pneumatic inflation valve connected to said air manifold and positioned near a bearing tube end for inserting and releasing air into said bladder interiors; a sensor aperture formed in an end cap and providing an opening to said air manifold; a sensor assembly seated within the bearing tube sensor aperture and joined in operative engagement with an air manifold interior; wherein said sensor assembly is comprised of a plurality of transducers, a sensor pre-processor, a microprocessor, a wireless transmitter and antenna; an external receiver for receiving data sensed by said transducers and transmitted by said antenna.

19. A system as recited in claim 18, further comprising: a strip lug loosely held and attached to each bearing tube longitudinal channel above an air bladder wherein inflation of an air bladder through the inflation valve expands the air bladder forcing the strip lug radially outward for enhanced gripping of said core.

20. A system as recited in claim 19, wherein: said transducers may be comprised of an air pressure sensor, acceleration sensor, temperature sensor, and battery power sensor.

21. A system as recited in claim 20, further comprising: a processor connected to said external receiver for stripping said sensed data from a transmitted signal and converting said data to a desired format; a display connected to said processor for presenting said sensed data.

22. A system as recited in claim 21, wherein said processor and display may provide the following control and monitoring features: visual/audible/digital signal alarms when air bladder pressure is outside preprogrammed minimum and maximum limits; visual/audible/digital signal alarms when temperature is outside preprogrammed minimum and maximum limits; internal logic to determine when a shaft has been inflated; resettable counter for number of inflations for a specific shaft; timer to determine total time a shaft has been inflated; visual/audible/digital signal alarm to indicate a preset inflation value has been reached; operating lock until a preset inflation has been reached; visual/audible/digital signal alarm indicating a bladder slow leak; visual/audible/digital signal alarm output indicating a low battery level for sensors with batteries; visual/audible/digital indicators when shaft starts and stops rotating; counter/timer determining number and/or time shaft has been rotating; visual/audible/digital indicator of shaft RPM; and visual/audible/digital signal alarms when shaft RPM is outside programmed ranges.

23. A system as recited in claim 22, wherein: said sensor aperture is formed in an end cap opposite the inflation valve.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a view, partially exploded of a pneumatic core shaft with a single bladder;

(2) FIG. 2 is a cross-sectional view of the single bladder pneumatic core shaft along the shaft longitudinal axis.

(3) FIG. 3 is radial axis view of the shaft of FIG. 2 along the line B-B.

(4) FIG. 4A is a close up view of the right section of the shaft shown in FIG. 2;

(5) FIG. 4B is a close up view of the left section of the shaft shown in FIG. 2;

(6) FIG. 5 is a view, partially exploded, of a pneumatic core shaft with multiple bladders;

(7) FIG. 6 is a cross-sectional view of the multiple bladder pneumatic core shaft along the shaft longitudinal axis.

(8) FIG. 7 is a radial axis view of the shaft of FIG. 6 along the line B-B.

(9) FIG. 8 is a radial axis view of the shaft of FIG. 6 along the line C-C.

(10) FIG. 9A is a close up view of the right section of the shaft shown in FIG. 6;

(11) FIG. 9B is a close up view of the left section of the shaft shown in FIG. 6;

(12) FIG. 10 is a diagrammic view, partly in section, of a two shaft process.

(13) FIG. 11 is a diagrammic view, partly in section, of a single shaft process with a repeater;

(14) FIG. 12 is a plan view of an external bladder shaft adapter.

(15) FIG. 13 is a diagrammic cross-sectional view, partly in section, of the external bladder shaft adapter of FIG. 12.

(16) FIG. 14 is a plan view of a strip style shaft adapter.

(17) FIG. 15A is a diagrammic cross-sectional view of the sensor end of the adapter of FIG. 14.

(18) FIG. 15B is another diagrammic cross-sectional view of the sensor end of the adaptor of FIG. 14.

(19) FIG. 16A is a diagrammic cross-sectional view of the non-sensor end of the adapter of FIG. 14.

(20) FIG. 16B is another diagrammic cross-sectional view of the non-sensor end of the adapter of FIG. 14

(21) FIG. 17 is a diagrammic end view of the non-sensor end of the adapter of FIG. 14. FIG. 18 is a schematic view of a sensor assembly;

DETAILED DESCRIPTION OF INVENTION

(22) Referring to the drawings in detail wherein like elements are indicated by like numerals there is shown a pneumatic expanding core shaft 10 comprised of a hollow, cylindrical bearing tube 20 with one or more air bladders 30 contained within. The air bladder 30 has a pneumatic inflation valve 33 near a bladder end for inserting or releasing air into the bladder. Each air bladder 30 has an exterior surface 31 driving one or more lugs 40 loosely held and protruding through lug apertures 21 in the bearing tube 20. The lugs 40 engage the core 51 of a roll 50 of wound web material 52. In some configurations, the air bladder itself can engage the core without use of a separate lug. The shaft 10 has two ends 11 which may be journaled into a machine, engaged with two safety chucks, or engaged by a cam-follower type bearing, or other drive coupling method. As is expounded further below, with shaft adapter configurations, there is a hollow central bore, wherein the adapter slides over a smaller diameter shaft 10.

(23) Referring more particularly to FIGS. 1-4, 10-11 and 18, there is shown a pneumatic core shaft 10 with a single air bladder 30 contained within a cylindrical bearing tube 20. The shaft bearing tube 20 has a sensor aperture 22 formed therein providing an opening to the air bladder 30. A sensor assembly 60 is seated within the bearing tube sensor aperture 22 and joined in operative engagement with an air bladder interior 32. The sensor assembly 60 is generally positioned at a bladder end opposite to the inflation valve 33. Each sensor assembly 60 is comprised of one or more transducers 63, a sensor pre-processor 64, a microprocessor 61, a wireless transmitter 62 and antenna 68. Preferably, the transducers are comprised of an air pressure sensor 65, acceleration sensor 66 and temperature sensor 67. The sensor assembly may have a battery 69 to provide power or the sensor assembly may be powered through battery-less energy harvesting means. In either case, it would be desirable to also include power level sensing means within the sensor assembly.

(24) The sensor assembly 60 senses performance factors such as air pressure, temperature, and shaft rotation. Sensed data is stored in the sensor pre-processor 64 and then passed to the microprocessor 61 for transmittal to an external receiver 70. The external receiver 70 passes the signal with the data to a processor 71 wherein the data is stripped from the signal and processed into desired formats. The processor 71 may then pass processed data to a display 72 and/or industrial communication system 73. The receiver 70, processor 71 and display 72 can all be integrated into an existing tablet or smart phone unit. Where the sensor assembly transmitted signal must transmit over a large area or is subject to interference from various sources, a repeater 74 would be positioned near to the sensor assembly to provide means for boosting power within the signal. The transmitted signal can be any wireless signal including, but not limited to, RF, Bluetooth, induction wireless, UWB, ZigBee, or other.

(25) The processor and display functions may provide the following control and monitoring features: 1. Visual/audible/digital signal alarms when air bladder pressure is outside preprogrammed minimum and maximum limits; 2. Visual/audible/digital signal alarms when temperature is outside preprogrammed minimum and maximum limits; 3. Internal logic to determine when a shaft has been inflated. 4. Resettable counter for number of inflations for a specific shaft; 5. Timer to determine total time a shaft has been inflated; 6. Visual/audible/digital signal alarm to indicate a preset inflation value has been reached; 7. Operating lock until a preset inflation has been reached; 8. Visual/audible/digital signal alarm indicating a bladder slow leak; 9. Visual/audible/digital signal alarm output indicating a low battery level for sensors with batteries; 10. Visual/audible/digital indicators when shaft starts and stops rotating; 11. Counter/timer determining number and/or time shaft has been rotating; 12. Visual/audible/digital indicator of shaft RPM; and 13. Visual/audible/digital signal alarms when shaft RPM is outside programmed ranges.

(26) Referring more particularly to FIGS. 5-9, 10-11 and 18, there is shown a pneumatic core shaft 10 with multiple air bladders 30 contained within a cylindrical bearing tube 20. An air manifold 34 is provided near to both shaft ends 11 for distributing air to the air bladders 30. The air manifold 34 has a pneumatic inflation valve 33 near a core shaft end 11 for inserting or releasing air into the bladders. The air bladders 30 are positioned within longitudinal channels 23 formed within the bearing tube outer surface. Strip lugs 40 are loosely attached to the bearing tube channels 23 above the air bladders 30. Inflation of the bladders through the inflation valve 33 expands the bladders and forces the strip lugs radially outward for enhanced gripping of a web core. The strip lug 40 can either be in the shown configuration, or as a leaf-type lug (not shown). The shaft bearing tube 20 has a sensor aperture 22 formed therein providing an opening to an air manifold 34. A sensor assembly 60 is seated within the bearing tube sensor aperture 22 and joined in operative engagement with an air manifold interior 34. The sensor assembly 60 is generally positioned at a shaft end 11 opposite to the inflation valve 33, but could also be positioned on the same shaft end as the inflation valve 33. Operation of the sensor assembly 60 is as described above.

(27) Referring more particularly to FIGS. 10-11, 12, 13 and 18, there is shown an external bladder type shaft adapter 80. This type of shaft adapter is generally mounted onto a steel bar or as a shaft adapter so a 3 shaft can grip a 6 or larger core. The principles of the invention are the same whether or not the pneumatic air bladder is with a core shaft or shaft adapter. The advantages of monitoring attributes of the bladder, such as air pressure, temperature and motion are the same. As shown, the external bladder shaft adapter 80 is comprised of left and right modules 85 each having a hollow bore 84, two end caps 82 and a clamp collar 83 for attachment to a shaft (not shown). Each external bladder adapter module 85 has an air bladder 30 about the adapter module main body 81. The bladder is made from a semi-rigid polyurethane material, or similar, and its exterior surface 31 expands radially about the adapter to make direct contact with a core (not shown). The bladder interior 32 receives air through an inflation valve 33 mounted on one side of the adapter parallel to the adapter longitudinal axis. A sensor assembly 60 is attached to the bladder 30 on the other side of the adapter parallel to the adapter longitudinal axis. The sensor assembly transmits sensed data as described above. The air bladders 30 for the modules may be interconnected by a pneumatic hose 86.

(28) Referring more particularly to FIGS. 10, 11, 14-17, and 15, there is shown a strip style shaft adapter 90. As with the bladder adapter, a strip adapter is generally mounted onto a steel bar or as a shaft adapter so a small diameter shaft can grip a larger core. The strip adapter 90 is comprised of a left and right module 97, each comprised of a hollow, generally cylindrical bearing tube 91 with a hollow bore 95 and having a plurality of longitudinal channels 92 formed therein. Each channel has an air bladder 30 driving a corresponding strip lug 40 for engagement with a core (not shown). The air bladders 30 are interconnected by means of an air manifold 34 which in turn is inflated through a pneumatic inflation valve 33. The air manifolds for each module 97 may be interconnected by means of a pneumatic hose 98. The strip adapter have end caps 93 and clamp collars 94 for attachment to a shaft. A sensor assembly 60 is attached to one end of the adapter 90 and is interconnected to the air manifold by means of a pneumatic sensor connection 96. The sensor assembly 60 transmits sensed data as described above.

(29) It is understood that the above-described embodiments are merely illustrative of the application. Other embodiments may be readily devised by those skilled in the art, which will embody the principles of the invention and fail within the spirit and scope thereof.