US1969568A - Roll-holder for rivet spinning machines - Google Patents

Description

G. A. LINLEY ROLL HOLDER FOR RIVET SPINNING MACHINES Aug. 7, 1934.

Filed Sept. 17, 1931 INVENTOR. UEURGEA L/NLEY.

' ATTORNEK.

Patented Aug. 7, 1934 UNITED STATES 1,969,568 ROLL-HOLDER FOR RIVET SPINNING HINES MAC George A. Linley, Trumbull, Conn. Application September 17, 1931, Serial No. 563,305

Claims.

The present invention relates to roll-holders for rivet spinning machines, and has for an object to provide a roll-holder which will reliably support the rolls against strain and wear, and

5 which may be readily adjusted to insure a proper relation of the rolls at all times. The roll-holder is of a type in which a pair of rolls are rotatably held in a holder at a slight angle, with their concave peripheral surfaces meeting at the bottom,

where they engage and form the rivet head, and separated at the top. Due to wear or strain, there has been a tendency in the past for the rolls to become separated after very little use, with the result that a small bur would be formed at the center of the rivet head, and in order to obviate this condition it is proposed in the present invention to provide a holder in which the rollsupporting axle may be adjusted with respect to the side arms ofthe holder to any desired extent, the side arms adapted to be drawn into the exact proper close relation with the rolls, and in which the axle is so formed as to be held against loosening under the severe strain to which the device is put in use.

A further object is to provide a roll-holder which will automatically lubricate the rolls so that a small amount of lubricant will be supplied to each rivet head as it is spun down.

A still further object is to provide a roll-holder which will protect the operator against flying chips, flakes and lubricant.

With the above and other objects in View embodiments of my invention are shown in the accompanying drawing, and these embodiments will be hereinafter more fully described with reference thereto and the invention will be finally pointed out in the claims.

In the drawing:

.Fig. 1 is a front elevation of a roll holder,

. accordingto one embodiment of the invention.

Fig. 2 is a side elevation thereof. Fig. 3 is a vertical sectional view, taken along the line 3-3 of Fig. 1. Fig. 4 is a perspective view of the guard employed.

Fig. 5 is a perspective view of the axle employed. Fig. 6 is a vertical sectional View of modified form of the invention.

Fig. 7 is a fragmentary side elevation thereof,

' the guard being removed.

Similar reference characters indicate corresponding parts throughout the several figures of the drawing. 7

Referring to the drawing, the roll-holder is of substantially cylindrical shape, and is prosaid passage under compression.

own tension and the tension of the arms.

vided at its upper end with the usual hexagonal flange 10 for securing the same to, the threaded shank of the spinning machine, an interiorly threaded socket 11 being provided in the upper end of the holder for this purpose. A pair of 50 downwardly extending spaced arms or jaws 12 and 13 are provided between which the rolls rotate, the inner walls of these arm's being flat and slightly converging downwardly, so that the opening between the rolls is slightly wider at the top than at the bottom. This opening is divided at the top by a downwardly projecting fin 14, the sidesof which are taperedin' parallel relation to the inner converging sides of the arms, and is adapted to separate the rolls at the top, as will presently more fully appear. 1

The arm 13 is provided with a shouldere passage 15, while the'arm 12 is provided in opposed relation with 'a' threaded passage 16, and the arms are tempered, so that they have a slight resiliency.

The rolls 17, 18 which are of the usual form, are rotatably mounted on a pin or axle 19,hav-' ing a head 20 at one end, and having a threaded portion 21 at the other end, split or slotted transversely, as at 22, the pin being" tempered and the threads 21 slightly oversize with respect to the threaded passage 16, so that it will engage The threads 21 of the pin are of such length that when engaged with thethreaded passage 21 they extend for a distance inwardly of the inner wall of the arm 13.

I The pin 19 is engaged through the shouldered passage 15 and screwed into the threaded passage 16, and dueto the compression of the split end of the'pin under spring tension is securely held against loosening in any desired position of adjustment. The length of th'e'threads 2'0 permits the pin to be tightened to' any'desired extent to draw the arms 12 and 13 toward each other to maintain a tight relation of the rolls at their point of contact, the pin being held against loosening in this relationboth by'its In the usual type of roll-holder the pin is shouldered adjacent the screw threads, this shoulder abutting the inner wall of the arm into which the pin is screwed, so that when it is tightly screwed into place the relation of the arms is 05 fixedand no adjustment for wear is possible, According to my invention the pin may be tightened to any desired extent, so that regardless ofv wear the rolls may be maintained in their proper .relation and their period of use is extended. The formation of burs on the rivet heads due to separation of the rolls is obviated.

In the upper portion of the holder there is provided a drilled hole 23 which extends downwardly from the threaded socket ll to a point within the fin 14 below the peripheries of the rolls, and within this hole there is provided a lubricating wick 24 pressed downwardly into contact with the roll surfaces by a spring 25 disposed in the hole between the upper end of the wick and a retaining closure plate 26, which may be snapped into place and held by the threads. Oil or grease is supplied to the wick through a radial duct 27 in the holder, the" outer end of which is adapted to be normally closed by one side of the guard member, presently to be described. As the rolls revolve in opposite directions a film of oil or grease will -b'e (':onstantlysupplied to their surfaces by the wick and this will be transmitted to the rivet head. 'The' rotation of the rolls in opposite directions will tend to turn the wick'about a vertical 'axis, so that it will not become unevenlyworn.

The guard member is of U-shape, its side portions 28 and 29, which are adapted to conform to the side of the holder, being connected at the bottom by transverse portions 30 and 31. Due to the springiness of the metal of which the guard is preferably formed the side portions 28 and 29 may be sprung outwardly and when engaged with the holder'will cling to it under tension. The lower end of the guard has an opening32 through which therolls project, and at each side is bulged out, as at 33 and 3i,to provide clearance at the sides for the rolls. The guard is retained in place upon the holder by spring lugs 35 and 36 at its upper edge, which snap into recesses 37 and 38 formed in the sides of the holder, and which permit the guard to be readily removed and replaced when desired. It will be observed that the guardforms a closure for the oil duct 27. In operation the guard prevents oil from flying .on the operator, and. also confines any chips or flakes which may be 1 carried from the rivet head uponthe roll surfaces, so that the danger of being hit in. the eye by such particles is obviated. q

, In Figs. 6 and '7 I have illustrated a modificationin which the drilled hole 23- is of larger diameter than in the first form anddoes not extend into the fin, and a narrower slot 39 is provided in the fin, preferably by drilling, and forms a bearing in which theshaft 40 of a pair of lubricating rollers 41 and .42 is engaged for vertical .sliding movement. The rollers which aredisposed at each side of the fin beneath the wick'24 have slightly rounded peripheries and ride on the surfaces of the rolls 1? and 18, being freely rotatable upon the shaft 40, so that they rotate in opposite directions during rotation of the rolls 1'? and 18 andcarry lubricant fro the wick to the surfaces of said rolls. In the modification illustrated in Figs. (Sand '1 I have also shown amodified form 'of*roll supporting pin '19,'which it will be understood may also be employed in the first embodiment, if desired. In the split end of the pina tapered threaded hole 43 is 'drilled and is engaged by a tapered set'screw 44, which is adapted to be screwed into the pin after it is'adjusted to "expand and bind the threaded end of the pin against movement, this taperedset screw being withdrawn when it is desired 'to turn the pin.

v I have illustrated and described preferred and satisfactory embodimentsof my invention but "it tween said arms, the upper portion of said holder having a vertical passage therein and a duct extending from said passage to the exterior surface of said holder, lubricating means disposed in said passage and engaging the surface of said rolls, and a removable guard disposed about said spaced arms and forming a lateral closure for said rolls and also forming a closure for said duct.

2. In a roll-holder for rivet spinning machines, aholder body having a pair of spaced arms having aligned pin receiving passages, one of said passages being threaded, a pin extending through the other of said passages and screwed into said threaded passage, said 'pin having a split in its threaded end and adapted to expand against said threaded passage to bind the-pin against turning,

rolls carried upon said pin between said. arms,

and a guard disposed about said spaced arms forming a lateral closure for said rolls and having open portions exposing theends of said pin. 3. In a roll holder for rivet spinning machines, a holder body comprising an upper head por tion and a pair of downwardly extending arms having upwardly diverging opposed walls, a roll carrying pin extending between said arms, a pair of 'apertured rolls disposed upon said pin between said walls and having bearing contact therewith, and having bearing contact with each other at the rivet spinning pointoutwardly of said arms, a separating fin extending downwardly from said headportion and disposed in the central vertical plane between said. rolls adapted to maintain them in diverging relation parallel to said diverging walls, said head portion and said fin having a common central passage of greater width than the thickness of said in said passage and slot and engaging the su-r-- faces ofsaid rolls at each side of said fin. '4. In a roll holder for rivet spinning machines, a holder body comprising an upper head portion and a pair of downwardly extending arms having upwardly-diverging opposed walls, a roll carrying pin extending between said arms, a pair of apertured rolls disposed upon said pin between said walls and having bearing contact therewith, and having bearing contact with each other at the rivet spinning point outwardly of'said arms,

aseparating fin extending downwardly from said head portion and disposed in the centralyertical plane between said rolls adapted to maintain them in diverging relation parallel to said diverging walls, said head portion and said fin having a common central passage of greater width than the thickness of said fin extending downwardly through said head portion and-into said separating fin and forming a slot in said fin, and a lubricating'wick disposed in said passage and slot and engaging the surfaces of said rolls at each side of said fin, the walls of said slot abutting said wick at opposed sides in the central vertical plane between said rolls to hold said wick against head portion and disposed in the central vertical plane between said rolls adapted to maintain them in diverging relation parallel to said diverging walls, said head portion having a lubricant passage of greater width than the thickness of said fin extending downwardly therein, and lubricating rollers mounted at each side of said fin and engaging the surfaces of said rolls, and having their peripheries in relation to said passages to receive lubricant therefrom.

GEORGE A. LINLEY.

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