CA1263356A - Roll support spindle - Google Patents
Roll support spindleInfo
- Publication number
- CA1263356A CA1263356A CA000496483A CA496483A CA1263356A CA 1263356 A CA1263356 A CA 1263356A CA 000496483 A CA000496483 A CA 000496483A CA 496483 A CA496483 A CA 496483A CA 1263356 A CA1263356 A CA 1263356A
- Authority
- CA
- Canada
- Prior art keywords
- roll support
- support spindle
- axle
- apertures
- hollow tubular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Rolls And Other Rotary Bodies (AREA)
Abstract
ABSTRACT
"ROLL SUPPORT SPINDLE"
A roll support spindle comprising a hollow tubular axle having a number of apertures in the circumferential wall thereof filled by an annular elastomeric membrane.
The interior of the axle is sealed by end plugs and and adapted to be pressurised by air injected through a valve causing the annular membrane extending between the end plugs to bulge outwardly through the apertures to centralize and lock a roll core on the spindle.
"ROLL SUPPORT SPINDLE"
A roll support spindle comprising a hollow tubular axle having a number of apertures in the circumferential wall thereof filled by an annular elastomeric membrane.
The interior of the axle is sealed by end plugs and and adapted to be pressurised by air injected through a valve causing the annular membrane extending between the end plugs to bulge outwardly through the apertures to centralize and lock a roll core on the spindle.
Description
~2~i335~`
"IMPROVED ROLL SUPPORT SPINDLE"
TECHNICAL FIELD
This invention relates to an improved roll support seindle and has been devised particularly though not solely for the ~upport of rolls of continuous material during any process requiring rotation of the roll.
BACKGROUND ART
There are many situations whera it is desired to support a roll of continuous sheet material ~uch as paper or ~heet plastics material, either for dispensing of material from the roll or for winding material onto the roll. Such rolls commonly have hollow tubular core~
formed, for example, from cardboard or plastics or metal tubing and are g~nerally ~upported for rotation on a spindle in the apparatus concerned. The roll i~ ~upported on the spindle in a number of di~ferent ways depending on the application. For example, the spindle may be provided with cones at either end thereof, one cone being fixed and the other cone being axially movable to sueport the roll between the cone~ in a wedqing action and centralise the roll on the spindle. Other form6 o~ spindle have been provided with a plurality of longitudinal slats having studs protruding inwardly tharefrom through the wall of the spindle to a central actuating device adapted to move the slats outwardly and hence increase the circumference of the ~pindle to lock a roll core thereon.
These known methods of mounting a roll onto a spindle are either complex and therefore expensive to manufacture and prone to breakdown in use, or are cumbersome and time consuming to use, requiring considerable operator effort and taking considerable process time.
It is therefore an object of the present invention to provide an improved roll support spindle which will obviate or minimise the foregoing di~advantages in a simple yet effective manner, or which will at least provide the public with a useful choice.
5.2~3356 Accordingly the invention consists in a roll support spindle comprising a hollow tubular axle adapted to be rotatably supported by suitable bearings, end plugs at or toward either end of the axle forming a fluid-tight chamber therein, a plurality of apertures in the tubular wall of the axle between the end plugs, an elastomeric membrane cast in place over at least part of the interior surface of the tubular wall covering and sealing the apertures, and fluid supply means adapted to pressurize the interior of the hollow tubular axle causing the elastomeric membrane to bulge outwardly through the apertures.
Preferably the elastomeric membrane is formed by rotational casting of an elastomeric material and covers the entire surface of the interior wall of the hollow tubular axle between the end plugs.
Preferably the elastomeric membrane fills the apertures in the tubular wall, finishing substantially flush with the exterior surface of the tubular axle when the interior of the hollow tubular axle is not pressurized.
Notwithstanding any other forms that may fall within its scope, one preferred form of the invention will now be described by way of the example only with reference to the accompanying drawings, in which:~
Fig. 1 is a longitudinal cross-section through a roll support spindle according to the invention;
Fig. 2 is a transverse cross-section on the line B-B of Fig. l;
Fig. 3 is a longitudinal cross-section of the spindle shown in Fig. 1 with a roll core mounted thereon; and Fig. 4 is a transverse cross-section on the line A-A of
"IMPROVED ROLL SUPPORT SPINDLE"
TECHNICAL FIELD
This invention relates to an improved roll support seindle and has been devised particularly though not solely for the ~upport of rolls of continuous material during any process requiring rotation of the roll.
BACKGROUND ART
There are many situations whera it is desired to support a roll of continuous sheet material ~uch as paper or ~heet plastics material, either for dispensing of material from the roll or for winding material onto the roll. Such rolls commonly have hollow tubular core~
formed, for example, from cardboard or plastics or metal tubing and are g~nerally ~upported for rotation on a spindle in the apparatus concerned. The roll i~ ~upported on the spindle in a number of di~ferent ways depending on the application. For example, the spindle may be provided with cones at either end thereof, one cone being fixed and the other cone being axially movable to sueport the roll between the cone~ in a wedqing action and centralise the roll on the spindle. Other form6 o~ spindle have been provided with a plurality of longitudinal slats having studs protruding inwardly tharefrom through the wall of the spindle to a central actuating device adapted to move the slats outwardly and hence increase the circumference of the ~pindle to lock a roll core thereon.
These known methods of mounting a roll onto a spindle are either complex and therefore expensive to manufacture and prone to breakdown in use, or are cumbersome and time consuming to use, requiring considerable operator effort and taking considerable process time.
It is therefore an object of the present invention to provide an improved roll support spindle which will obviate or minimise the foregoing di~advantages in a simple yet effective manner, or which will at least provide the public with a useful choice.
5.2~3356 Accordingly the invention consists in a roll support spindle comprising a hollow tubular axle adapted to be rotatably supported by suitable bearings, end plugs at or toward either end of the axle forming a fluid-tight chamber therein, a plurality of apertures in the tubular wall of the axle between the end plugs, an elastomeric membrane cast in place over at least part of the interior surface of the tubular wall covering and sealing the apertures, and fluid supply means adapted to pressurize the interior of the hollow tubular axle causing the elastomeric membrane to bulge outwardly through the apertures.
Preferably the elastomeric membrane is formed by rotational casting of an elastomeric material and covers the entire surface of the interior wall of the hollow tubular axle between the end plugs.
Preferably the elastomeric membrane fills the apertures in the tubular wall, finishing substantially flush with the exterior surface of the tubular axle when the interior of the hollow tubular axle is not pressurized.
Notwithstanding any other forms that may fall within its scope, one preferred form of the invention will now be described by way of the example only with reference to the accompanying drawings, in which:~
Fig. 1 is a longitudinal cross-section through a roll support spindle according to the invention;
Fig. 2 is a transverse cross-section on the line B-B of Fig. l;
Fig. 3 is a longitudinal cross-section of the spindle shown in Fig. 1 with a roll core mounted thereon; and Fig. 4 is a transverse cross-section on the line A-A of
- 2 -~,263356;`
Fig. 3.
In the preferred form of the invention a short roll support spindle adapted to be cantilevered from a single set of bearings is constructed as follows, although it will be appreciated that the spindle may be made of any desired length and may be supported by bearings at either end thereof.
The roll support spindle comprises a hollow tubular axle 1 in which is inserted end plugs 2 and 3. The end plugs form a fluid-tight chamber 4 withln the hollow tubular axle. The roll support spindle is adapted to be rotatably supported by suitable bearings and is conveniently provided with a ~ournal 5 which may form an extension of the end plug 3. In the alternative any other suitable form of bearing support may be provided.
A plurality o$ apertures 6 are formed in the circumferential wall of the hollow tubular axle, equispaced around the circumference of the axle. The apertures may take any suitable configuration such as the axially elongate, or circular apertures shown in the accompanying drawings.
An elastomeric membrane is cast in place over at least part of the interior surface of the tubular wall~ covering and sealing the apertures 6. In the preferred form of the invention the elastomeric membrane covers the entire surface of the interior wall of the hollow tubular axle between the end plugs 2 and 3 and fills the apertures 6, finishing flush with the exterior surface of the tubular axle as can be seen at 8. The elastomeric membrane may be formed from any suitable material and in the preferred form of the invention is formed by rotational casting from polyurethane within the tubular axle.
The end plug 2 is provided with fluid supply means adapted to pressurize the interior of the hollow tubular axle ~2~ 5~;
causlng the elastomerlc membrane 7 to bulge outwardly through the apertures. In the preferred form of the - 3a -~263356 invention t~e fluid supply mean~ compri~e~ an air supply and r~lease valve 9 axially located in the end plug 2.
In u~e when it i~ desired to ~upport a roll of material on the roll ~upport spindle according to the invention, the roll core 10 (Fig. 3) is engaged over the ~indle until it i8 positionQd in the desired axial location. Compressed air i~ then ~upplied under pressure through the valve 9 into the interior chamber 4 causing the elastomeric membrane 7 to bulge outwardly through the aperture~ 6 as shown at 11. The~e bulges of elastomeric material automatically centrali6e the roll core 10 on the spindle and securely hold the roll core locked tightly in place on the spindle ready for rotation.
Once the material has been exhau~ted from the roll core, air eressure i~ released from the chamber 4 through the valve 9 allowing the ela~tomeric membrane to return to its normal po~ition flush with the outer surface of the tubular axle 1 allowing the roll core 10 to be simply removed ~rom the spindle.
In thi~ manner a roll support spindle is provided which i~ ~imple and economical to manufacture, reliable in u~e, and which enables an operator to quickly and simply engage or remove a roll core from the spindle.
Fig. 3.
In the preferred form of the invention a short roll support spindle adapted to be cantilevered from a single set of bearings is constructed as follows, although it will be appreciated that the spindle may be made of any desired length and may be supported by bearings at either end thereof.
The roll support spindle comprises a hollow tubular axle 1 in which is inserted end plugs 2 and 3. The end plugs form a fluid-tight chamber 4 withln the hollow tubular axle. The roll support spindle is adapted to be rotatably supported by suitable bearings and is conveniently provided with a ~ournal 5 which may form an extension of the end plug 3. In the alternative any other suitable form of bearing support may be provided.
A plurality o$ apertures 6 are formed in the circumferential wall of the hollow tubular axle, equispaced around the circumference of the axle. The apertures may take any suitable configuration such as the axially elongate, or circular apertures shown in the accompanying drawings.
An elastomeric membrane is cast in place over at least part of the interior surface of the tubular wall~ covering and sealing the apertures 6. In the preferred form of the invention the elastomeric membrane covers the entire surface of the interior wall of the hollow tubular axle between the end plugs 2 and 3 and fills the apertures 6, finishing flush with the exterior surface of the tubular axle as can be seen at 8. The elastomeric membrane may be formed from any suitable material and in the preferred form of the invention is formed by rotational casting from polyurethane within the tubular axle.
The end plug 2 is provided with fluid supply means adapted to pressurize the interior of the hollow tubular axle ~2~ 5~;
causlng the elastomerlc membrane 7 to bulge outwardly through the apertures. In the preferred form of the - 3a -~263356 invention t~e fluid supply mean~ compri~e~ an air supply and r~lease valve 9 axially located in the end plug 2.
In u~e when it i~ desired to ~upport a roll of material on the roll ~upport spindle according to the invention, the roll core 10 (Fig. 3) is engaged over the ~indle until it i8 positionQd in the desired axial location. Compressed air i~ then ~upplied under pressure through the valve 9 into the interior chamber 4 causing the elastomeric membrane 7 to bulge outwardly through the aperture~ 6 as shown at 11. The~e bulges of elastomeric material automatically centrali6e the roll core 10 on the spindle and securely hold the roll core locked tightly in place on the spindle ready for rotation.
Once the material has been exhau~ted from the roll core, air eressure i~ released from the chamber 4 through the valve 9 allowing the ela~tomeric membrane to return to its normal po~ition flush with the outer surface of the tubular axle 1 allowing the roll core 10 to be simply removed ~rom the spindle.
In thi~ manner a roll support spindle is provided which i~ ~imple and economical to manufacture, reliable in u~e, and which enables an operator to quickly and simply engage or remove a roll core from the spindle.
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A roll support spindle comprising a hollow tubular axle adapted to be rotatably supported by suitable bearings, end plugs at or toward either end of the axle forming a fluid-tight chamber therein, a plurality of apertures in the tubular wall of the axle between the end plugs, an elastomeric membrane cast in place over at least part of the interior surface of the tubular wall covering and sealing the apertures, and fluid supply means adapted to pressurize the interior of the hollow tubular axle causing the elastomeric membrane to bulge outwardly through the apertures.
2. A roll support spindle as claimed in claim 1, wherein the elastomeric membrane covers the entire surface of the interior wall of the hollow tubular axle between the end plugs.
3. A roll support spindle as claimed in claim 1, wherein the elastomeric membrane fills the apertures in the tubular wall, finishing substantially flush with the exterior surface of the tubular axle when the interior of the hollow tubular axle is not pressurized.
4. A roll support spindle as claimed in claim 1, wherein the elastomeric membrane is formed by rotational casting of an elastomeric material within the hollow tubular axle.
5. A roll support spindle as claimed in claim 1, wherein the fluid supply means comprise an air supply and release valve in one of the end plugs.
6. A roll support spindle as claimed in claim 1, wherein the apertures are evenly spaced around the circumference of the hollow tubular axle.
7. A roll support spindle as claimed in claim 4, wherein the elastomeric material is polyurethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000496483A CA1263356A (en) | 1985-11-28 | 1985-11-28 | Roll support spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000496483A CA1263356A (en) | 1985-11-28 | 1985-11-28 | Roll support spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1263356A true CA1263356A (en) | 1989-11-28 |
Family
ID=4131982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000496483A Expired CA1263356A (en) | 1985-11-28 | 1985-11-28 | Roll support spindle |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1263356A (en) |
-
1985
- 1985-11-28 CA CA000496483A patent/CA1263356A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |