US2250560A

US2250560A - Mandrel for bobbins

Info

Publication number: US2250560A
Application number: US369682A
Authority: US
Inventors: Albert E Winslow
Original assignee: ATWOOD MACHINE CO
Current assignee: ATWOOD MACHINE CO
Priority date: 1940-12-11
Filing date: 1940-12-11
Publication date: 1941-07-29
Anticipated expiration: 1958-07-29

Description

MANDREL FOR BoBBINs Filed Dec. 1i, 1940 INVENTOR.

A TTORNEYS.

Patented YJuly 29, '1941 MANDREL FOR BOBBINS Albert E. Winslow, New London, conn., assigner to Atwood Machine Company, a corporation ol' Connecticut Application December 11, 1940, Serial No. 369,682

6 Claims.

'Ihis invention relates to a mandrel for a textile bobbin of the type used in winding and reeling machinery where it is desirable to doll the bobbin and supply a fresh core for the building up of a fresh package.

One of the objects of the invention is to provide for the easier and quicker doiilng of the bobbin and replacing of a fresh bobbin core in position.

Another object of the invention is to provide an arrangement whereby it is unnecessary to remove any part of the bobbin mandrel for placing a fresh bobbin core in position.

A further object of the invention is to provide a trigger release in the mandrel so that the gripping of the bobbin core may be released upon pressure being applied through the end of the bobbin core.

Another object of the invention is to initially move the bobbin core at the time of release of its gripping to a position so that more easy removal of the bobbin core from the mandrel may be effected.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is a central sectional view through the mandrel and the bobbin in position thereon;

Fig. 2 is a view similar to Fig. 1, illustrating the bobbin core as removed and the mandrel as moved to its released position;

Fig. 3 is a fragmental sectional view on a ,larger scale showing the gripping and releasing mechanism with the parts in gripping relation such as shown in Fig. 1;

Fig. 4 is a lateral section on substantially line 4--4 of Fig. 1; and

Fig. 5 is a fragmental sectional view of the gripping mechanism at the inner'end of the mandrel.

Usually after a bobbin package has been formed, for removal of that package, it is necessary to handle the package by engagement of the yarn itself and also to remove apart of the mandrel for replacing the bobbin core with an empty core. These are time-consuming operations and frequently awkward because of the position of the mandrel in the machine. In order to simplify this operation I have arranged a mandrel which may release the package by pressure on` a cap at the end of the mandrel, and

may be easily liftedl from the mandrel, as the movement of the portion of the mandrel released by such pressure serves to release the grip on the bobbin core; and the following is a more detailed description of the present embodiment of this invention, illustrating the preferredmeans by which these advantageous results may be accomplished:

With reference to the drawing, I0 designates an arm upon which there is iixedly mounted an arbor II by reason of the arborA being reduced as at I2 and passing through an opening I3 in the arm where thethreads I4 of the reduced portion are engaged by a nut I5. To hold the arbor Il in fixed relation with reference to the arm, a spacing washer I6 is used to engage a. shoulder I1 of the arbor, as shown in Figs. 1 and 2.' At the outer end of this arbor I I, I have provided a ball bearing housing I8 having a head portion 33 and a long tubular portion I9 extending along and spaced from the arbor and which is recessed as at 20 for the reception of a ball bearing unit 2l which unit is locked in place by a spring collar 22 to retain the ball bearing in housing I3 rotatably, anti-frlctionally mounted upon the arbor I I.

A housing member designated generally 25 is equipped with a needle bearing 26, in recess 21 thereof, which needle bearing is held in position in this recess and is slidable on..the arbor Il with this housing member. This housing member is provided with a series of

steps

23, 20, and 30. on its outer periphery with shoulders between these steps, as illustrated in Fig. 2. A sleeve 3I encircles and is received upon the ball bearing housing I8 and fixed thereto, while it is slidably received upon thestep 23. This sleeve is provided with' a series of openings 32 located peripherally about the sleeve, as illustrated 'in Fig. 4, in alignment with the head portion 33 of the ball bearing housing I8. Radially inwardly from each of these openings 32, there is located a bore 34 extending through the head 33 and parallel to the arbor axis, while there is an opening 35 extending from the bore 34 and in registry with the opening 32. A unit such as a ball 33 is located in each one of said registering openings of la sizeto project through the opening 32 but limited from passing completely therethrough by reason of a slightly greater diameter.

Locking pins 3l are located in each of said bores 34 at one end and also slidably located in a bore 30y in the head portion 39 of the needle bearing housing so as to be relatively axially and mandrel to a position from which the core movable in said bores. of said pins 31 and acts between the head 33 and A spring 40 encircles each a shoulder 4I on the pin 31, tending to move said pin to the left, as shown in Figs. 1 and 2. Each of these pins is equipped with a cam surface 42 which engages its ball 36 so that when said pin is moved to the left, as shown in Figs. 1, 2, and 3, the ball 36 will be forced outwardly through its registering openings 35 and 32 into the position shown in Figs. 1 and 3. A spring 45 encircles the tubular portion I9 of the ball bearing housing abutting the washer 46 which is held in place by spring ring 41 encircling this tubular portion. This spring acts against the thread plug 48 engaging the tubular portion 49 of the needle bearing housing and which is slidable along the hub I9.

A latch illustrated as a rockable pin 50 has a tapered end 5I and will rock in opening 52 in the head 33 by reason of lock washers 53 and 54 on either side of the opening 52. This latch has its inner end 55 urged inwardly by a spring 56 (see Fig. 2). A cap 60 slidable upon the end portion 6I of the arbor Il is urged outwardly by means of the spring 62 housed in a bore 63 of the arbor and engaging a recess 64 of the cap 6U. The movement of this cap is limited by set screw 65 entering recess 66 in the arbor, while an inclined surface 61 engages the tapered end 5I of the latch 50.

When it is desired to position the core 16 for a winding of the bobbin package 1|, such as shown in Fig. 1, this empty core 16 will be slid over sleeve 3|, as shown in Fig. 2, until its end engages the abutment 12 between

steps

29 and 30 of the needle bearing housing and then by further movement the core will be forced inwardly until the latch 50, which is urged by spring 56, swings upwardly so that its end 55 engages the cap 48 on the end of the tubular portion 49, where the housing member will be held in its retracting position, as shown in Fig, 1. As the sleeve 3| is moved from the position shown in Fig. 2 to the position shown in Fig. 1, the housing member 25 is also moved so that springs 40 are permitted to move the pins 31 from the position shown in Fig. 2 to the position shown in Fig. 1, which movement will cause the balls 36 to be forced outwardly, as shown in Fig. 1, by reason of the cam surface 42, and the core 1D will be rmly locked in position at its outer end. The inner end will be frictionally engaged by the spring-pressed members 15 located at spaced points about the step 29. The yarn will then be wound upon the core, usually by reason of surface drive. When the package has reached cornpletion, for removal it will be necessary only to press the cap 60 inwardly through the end 13 of the core. Pressing this cap inwardly causes the siu'face 61 to engage the tapered end 5I of the latch 50 and to rock it so that its end 55 disengages the cap 48 on the end of the tubular portion 49, and the core and its bobbin will then be moved to the position shown in Fig. 2, by action of spring 45. The housing 25 engages the ends of 'the pins 31, forcing them to the right as shown in Figs. 1 and 2, so= that the balls 36 may move into the deeper portion of the notches in these pins, thus causing the balls to release the core; and it will be merely necessary to insert three fingers into the opening 13 and by expansion of the fingers engage the inner surface of the core,

`and the package may then be removed without touching the yarn.

I claim:

1. A mandrel for a tubular bobbin core comprising an arbor, a member axially slldable relative to said arbor, said member being adapted to receive a tubular bobbin core thereon, and expansible andA contractible means to grip and release said core operable in response to said relative axial shifting of said member and arbor, and means operable through the outer end of the core to shift said member relative to said arbor.

2. A mandrel for a tubular bobbin core comprising an arbor, a member axially slidable relative to said arbor, said member being adapted to receive a tubular bobbin core thereon, expansible and contractible means to grip and release said core operable in response to said relative axial shifting of said member and arbor, a spring urging said member axially to release position, and a latch to hold said member in gripping position.

3. A mandrel for a tubular bobbin core comprising an arbor, a member axially slidable relative to said arbor, said member being adapted to receive a tubular bobbin core thereon, expansible and contractible means to grip and release said core operable in responseto said relative axial shifting of said member and arbor, a spring urgingsaid member axially to release position, a latch to hold said member in gripping position, and means operable through thev end of said core to move said latch to release position.

4. A mandrel for a tubular bobbin core comprising an arbor, a member axially slidable relative to said arbor, said member being adapted to receive a tubular bobbin core thereon, expan- `sible and contractible means to grip and release said core operable in response to said relative axial shifting of said member and arbor, a spring urging said member axially to release position, a latch to hold said member in gripping position, and a cap slidable on said arbor and engageable with said latch to move the latch to release position. k

5. A mandrel for a tubular bobbin core comprising an arbor, a sleeve having a plurality of openings therein, a member axially slidable relative to said arbor, units projectable through said openings, and a pin for each of said units, a spring for urging each of said pins in one direction, each pin having a cam surface to urge said units outwardly through said openings upon movement of the member axially on said arbor and the movement of said pins by said springs to cause said units to engage and grip a bobbin core.

6. A mandrel for a tubular bobbin core comprising an arbor, a sleeve having a plurality of openings therein, a member axially slidable relative to said arbor and sleeve, units projectable through said openings, a pin for each of said units having a cam surface to urge said units outwardly through said openings upon movement of the member axially on said arbor to cause said units to engage and grip a bobbin core', said pin being slidable parallel to the axis of the arbor, and a spring to urge said pin to cam the members into gripping position.

ALBERT E. WINSLOW.