Pin for supporting paper reels in paper converting plants

Patent metadata

Field	Value
Publication number	US-10315873-B2
Application number	US-201515512732-A
Country	US
Kind code	B2
Filing date	Sep 17, 2015
Priority date	Sep 23, 2014
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

Support pin for supporting reels of paper material, comprising an outer side (PX) and an inner side (PN), with the inner side (PN) that is adapted to be inserted into a reel (1) of paper material and with the outer side (PX) that remains on the outside of the same reel (1) when the inner side (PN) is inside the reel (1), said outer side (PX) being provided with a hooking portion (3) adapted to be engaged by means (CP) adapted to vertically move the pin (P). The outer side (PX) of the pin (P) is constituted by a shank (2) whose longitudinal axis coincides with the longitudinal axis (x-x) of the pin (P) and said hooking portion comprises an eyelet formed on the shank (2) and delimited by two parallel arms (30) that emerge radially from the shank (2) and are joined by a body (31) parallel to said longitudinal axis (x-x).

First claim

The invention claimed is:

1. A support pin for supporting reels of paper material, the support pin comprising:
an outer side and an inner side, the inner side being adapted to be inserted into a reel of paper material and the outer side remaining on an outside of the reel when the inner side is inside the reel, said outer side being provided with a hooking portion adapted to be engaged by a means for vertically moving the pin, the outer side of the pin comprising a shank having a shank longitudinal axis coinciding with a pin longitudinal axis of the pin and said hooking portion comprising an eyelet formed on the shank and delimited by two parallel arms that emerge radially from the shank and the two parallel arms are joined by a body parallel to said pin longitudinal axis.

2. A support pin according to claim 1 , wherein said eyelet is applied on a side of the shank that is turned upwards when the support pin is in operation.

3. A support pin according to claim 1 , wherein an outer surface of said inner side is formed by sectors, each of the sectors being formed by a cylindrical surface portion with a free front part to provide a number of front parts, the front parts of said sectors defining a substantially circular shape with a diameter varying between a maximum value ( 4 a ) and a minimum value ( 4 c ), and a difference (A) between said maximum value ( 4 a ) and said minimum value ( 4 c ) is comprised between 10% and 30% of the value maximum ( 4 a ): 0.30*( 4 a )≥Δ=( 4 a − 4 c )≥0.10*( 4 a ).

4. A support pin according to claim 3 , wherein each of said sectors has a rear part pivoted on a respective hinge and an intermediate part connected to a moving means for determining rotation of a respective one of said sectors around said hinge.

5. A support pin according to claim 4 , wherein a rear end of each sector is constrained to an outer cup-shaped part of an inner side body of the inner side by a pin inserted in a radial wing projecting externally from the outer cup-shaped part, an axis of each pin being oriented in a tangential direction with respect to the shank, and each pin being spaced by a predetermined value from an outer surface of the shank, each pin being inserted in a respective radial wing which acts as a spacer.

6. A support pin according to claim 4 , wherein said moving means is an elastic moving means.

7. A support pin according to claim 6 , wherein said elastic moving means comprises a plurality of helical springs.

8. A support pin according to claim 6 , wherein said elastic moving means comprises a pneumatic spring.

9. A support pin according to claim 3 , wherein the shank is cylindrical and the shank has an internal cavity and the inner side comprises an inner side body having: a rear part inserted longitudinally into the internal cavity of the shank with interposition of bearings; a front part turned towards one or more of the front ends of the sectors and the front part comprising a longitudinal extension of the rear part; and an outer cup-shaped part having an inner diameter that is greater than an outer diameter of the shank, in an intermediate area between the rear part and the front part, so that the rear part of the inner side body is inserted in the shank, the outer cup-shaped part being external to the shank that in part is inserted into the outer cup-shaped part, and the front part comprising an extension of the inner side body which is internal to the sectors.

10. A support pin according to claim 9 , wherein in front of a front end of the front part of the inner side body is disposed an air spring placed between a first plate and a second plate that are perpendicular to said pin longitudinal axis.

11. A support pin according to claim 10 , wherein:
the first plate has a rear extension which acts as a spacer and is fixed to the front end of the front part of the inner side body and the second plate is on an opposite side with respect to the air spring;
a plurality of rods connect said second plate with a collar, each of the rods being fixed on one side to the second plate and on the opposite side to a rear appendix of the collar and each of the rods passes freely through a respective through hole provided in the first plate;
a helical spring fitted on each of the rods to provide a number of helical springs;
said rods and said helical springs are oriented parallel to said pin longitudinal axis.

12. A support pin according to claim 11 , wherein, when the pneumatic spring is discharged, the helical springs maintain the collar on the rear part of the inner side body and the rear part of the collar is pushed by the helical springs against an abutment surface provided by the inner side body between the outer cup-shaped part and the front part, and the sectors are open with connecting rods in a radial position relative to the pin longitudinal axis, oriented parallel to a load acting on the pin, the sectors being maintained normally open by the springs; and
when the pneumatic spring is charged, resistance of the helical springs is overcome and the collar advances, together with a foot of the connecting rods, such that the sectors move towards each other with mutual approach of respective front parts.

13. A support pin according to claim 3 , wherein:
each sector is bound to the front part of an inner side body of the inner side via a connecting rod hinged to a lower side of a collar mounted longitudinally slidable on the front part of the inner side body and, from an opposite upper side, on an inner surface of a respective sector;
a connection of the connecting rod to the collar is made by a connecting pin with an axis parallel to a respective pin which connects a rear part of the sector to a respective wing of a cup-shaped part;
a connection of the connecting rod to the inner surface of the sector is made by means of a further pin parallel to the connecting pin.

14. A support pin according to claim 1 , wherein an outer surface of said inner side is formed by sectors, each of the sectors being formed by a cylindrical surface portion with a free front part to provide a number of front parts, the front parts of said sectors defining a substantially circular shape with a diameter varying between a maximum value ( 4 a ) and a minimum value ( 4 c ), and a difference (A) is comprised between 15% and 20% of the maximum value ( 4 a ): 0.20*( 4 a )≥Δ=( 4 a − 4 c )≥0.15*( 4 a ).

15. A support pin according to claim 1 , wherein an outer surface of said inner side is formed by sectors, each of the sectors being formed by a cylindrical surface portion with a free front part to provide a number of front parts, the front parts of said sectors defining a substantially circular shape with a diameter varying between a maximum value ( 4 a ) and a minimum value ( 4 c ), and a difference (Δ) is comprised between 15% and 18% of the maximum value ( 4 a ): 0.18*( 4 a )≥Δ=( 4 a − 4 c )≥0.15*( 4 a ).

Assignees

• Futura Spa

Inventors

• Perini Fabio

Classifications

• B65H2511/15

  Height, e.g. of stack · CPC title

• B65H2405/423

  Overhead means, gantry · CPC title

• B65H2515/31

  Tensile forces · CPC title

• B65H19/126 Primary

  with both-ends supporting arrangements · CPC title

• B65H2301/41346

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