Core chuck system

Patent metadata

Field	Value
Publication number	US-11040847-B2
Application number	US-201816219560-A
Country	US
Kind code	B2
Filing date	Dec 13, 2018
Priority date	Dec 14, 2017
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

A core chuck system ( 10 ) comprising a core chuck ( 11 ) and a spindle ( 12 ) onto which the core chuck ( 11 ) is lockable, which core chuck system ( 10 ) comprises a ball locking mechanism, a locking button ( 15 ) and a cone connection (C).

First claim

I claim:

1. A fiber web roll core chuck system comprising:
a spindle for supporting a fiber web roll core, the spindle formed by a convex cone mounted to or forming part of a roll support bar, the convex cone having a convex conical connection surface and defining an axis of the convex cone which axis defines a first direction extending toward the roll support bar;
a core chuck having portions forming a concave conical surface, shaped to mate with the convex conical connection surface so that an axis defined by the concave conical surface is coincident with the axis of the convex cone when said concave conical surface and said convex conical connection surface are mutually engaged;
wherein the core chuck defines a cylindrical surface exterior to the concave conical surface, wherein the cylindrical surface is formed about the axis defined by the concave conical surface, the cylindrical surface engageable with an interior surface of a fiber web roll core;
wherein at least one of the spindle and the core chuck has at least one ball mounted thereto and biased by a spring to move toward the other of the spindle and the core chuck, wherein the same other of the spindle and the core chuck has a locking groove which receives the at least one ball to lock the spindle and the core chuck together with the concave conical surface engaged with the convex conical connection surface;
a lock button forming an outer end of the core chuck system, the lock button being centered about the axis of the convex cone, and mounted to the same other of the spindle and the core chuck for movement along the axis of the convex cone, in the first direction toward the roll support bar;
wherein the lock button when pushed moves in the first direction to compress the spring such that the at least one ball is movable, thereby unlocking the spindle and the core chuck to allow separation of said concave conical surface and said convex conical connection surface;
wherein the core chuck concave conical surface forms a frustum having a base from which the concave conical surface extends; and
wherein the frustum, opposite the base, is followed by a portion of the core chuck forming a protrusion extending inwardly of the concave conical surface wherein the protrusion is followed by a portion of the core chuck forming a groove for receiving the at least one ball.

2. The system of claim 1 wherein the at least one ball mounted to at least one of the spindle and the core chuck, is engaged by an inclined plane forming a portion of the button.

3. The system of claim 1 wherein the core chuck has a flange extending radially outwardly of and surrounding the cylindrical surface and has a conical bevel terminating the cylindrical surface, wherein the conical bevel facilitates insertion of the cylindrical surface into one end of a fiber web roll core and the flange prevents the core chuck from moving further into the roll core.

4. The system of claim 1 wherein the concave conical surface and the convex conical connecting surface have a cone angle of 1:1-1:10.

5. The system of claim 1 wherein the core chuck is a rotational symmetric part formed as a mantle type part with an inner center opening.

6. The system of claim 1 wherein the roll core chuck system is manually operable.

7. The system of claim 1 wherein application of a force less than 150-100 N unlocks the core chuck from the spindle.

8. A fiber web core chuck system comprising:
a spindle attached to a support bar;
a core chuck releasably connected to the spindle, a first direction being defined extending from the spindle to the core chuck, the core chuck having an inner center opening which is radially symmetric about a first axis, wherein portions of the core chuck extend radially inwardly into the center opening to define a stopping protrusion and a locking groove positioned away from the spindle in the first direction from the stopping protrusion, and wherein the core chuck has portions defining an inner cone surface which opens toward the spindle and which is between the stopping surface and the spindle;
wherein the spindle has portions defining an outer cone surface extending from the support bar outwardly in the first direction and ending near a groove in the spindle, the spindle groove communicating with a center bore which extends in the first direction and which opens towards the core chuck;
a lock button which is received within the spindle center bore, wherein the lock button has an external functional surface facing said spindle groove;
a spring which is positioned within the center bore and extends between portions of the spindle and the lock button to bias said lock button in the first direction; and
at least one ball disposed within the spindle groove and engaged with the functional surface of the lock button, the functional surface of the lock button being biased by the spring providing a force to affect the at least one ball, the core chuck engaging the spindle in a locked position in which the at least one ball within said spindle groove extends within the core chuck locking groove preventing the removal of the core chuck in the first direction and restricting the movement in the first direction of the stopping protrusion, and when the lock button is depressed toward the spindle the functional surface of the lock button releases the at least one ball to move radially inwardly, freeing the stop protrusion and thus the core chuck so it can be removed from the spindle.

Assignees

• Valmet Technologies Oy

Inventors

• Vuoristo Tommi

Classifications

• B65H2402/60

  Coupling, adapter or locking means · CPC title

• B65H19/126 Primary

  with both-ends supporting arrangements · CPC title

• B65H75/248

  expansion caused by actuator movable in axial direction · CPC title

• B65H2301/41346

  separate elements engaging each end of the roll (e.g. chuck) · CPC title

• B65H16/06

  both-ends type · CPC title