US2928625A - Bobbin holder - Google Patents

Description

March 15, 1960 a. FUSAROLI 2,928,625

BOBBIN HOLDER Filed Aug. 22, 1957 6 INVENTOR.

6 OFFKEDO BOBBIN HOLDER Golfredo Fusaroli, Milan, Italy, assignor to Sampre Meccanica di Precisione S.p.A., Milan, Italy Application August 22, 1957, Serial No. 679,714

3 Claims. '(Cl. 242-130.2)

This invention refers to abobbinholder adapted for suspending bobbins on crjeels.

It is an object of the present invention to provide the bobbin holders heretofore known comprise, nearly always, one or more 'metallic cylindrical bodies which are obtained mainly by extrusion and subsequent stamping. This mode of manufacture is time consuming and expensive.

It is another object of the present invention to avoid the use of metals, as far as possible, in the construction of bobbin holders and to use stamped metal parts, as far as possible, rather than tubular or extruded metal parts.

It is another object of the present invention to provide a bobbin holder the structure of which is extremely simple. A further object of the present invention is to provide a bobbin holder of reduced weight, in which the employment of costly materials is reduced to an acceptable minimum. I

A still further object of the present invention is to provide a bobbin holder the assembly and disassembly of which can be performed with facility, without the employment of any special tools.

Still another object of the present invention is to produce a bobbin holder which, besides having the above advantages, is absolutely reliable in operation.

.Yet another object of the present invention is to provide a' bobbin vholder comprising two principal parts easily separable from one another by a very simple manual operation, one of these parts being normally alfixed to a creel board and including a bearing head and a ball bearing associated therewith, and the other part being the body of the bobbin holder. In accordance with an aspect of the invention, the separation or the assembly, as the case may be, of these two principal parts can be eifected by manually acting on a specially provided spring-biased member guided for sliding along two elongated parallelly spaced members.

These and other objects and advantages of the present invention will become apparent from the following detailed description of an illustrative embodiment which is to be read in connection with the accompanying drawing, wherein:

'Figure 1 is a longitudinal cross-sectional view of the bobbin holder embodying the invention;

Figure 2 is an elevational view of the bobbin holder, partly in section, and showing the two main component parts of the bobbin holder following separation of such P "FigureS is a detailed view-showing the bearing head and the ball bearing and dust arresting disc cooperating therewith.

Reference being now made to the drawing it will be these elongated members. The upper end portions of' the two elongated members are shaped, as'at 3 and 3, r

so as to have a substantially rectangular outline, and;

are adapted to receive, the outer casing 4 of a ball bear ing 5 therebetween. The lowermost" ends of thetwo elongated members 1 and 2 are inserted into correspond ingly arcuate slots 6' and 6" formed in a cylindrical body 6 adjacent the periphery of the latter. Said cylindrical body 6, which is intended to form the lowermost part of the bobbin holder also has a hole 7 extending diametrically therethrough and adapted to receive a pin 8 which enters registering holes 9 and 9 formed in the elongated members 1 and 2, respectively. Between the arcuate slots 6 and 6", the cylindrical body 6 has a substantially rectangular slot 10 extending Perpendicular to pin 8 and the function and the purpose of which will be explained in more detail hereinafter. I

A hexagonal catch 11 is mounted for rotation about an axle 11a which has its opposite ends carried by members l and 2 and is disposed in generally diametrical relationship with respect to the arcuate cross-sections of the two parallel elongated members 1 and 2. This hexagonal catch is of conventional construction, for example, as disclosed in United States Letter Patent No. 2,408,674, and a detailed description thereof is unnecessary. The catch is actuated by a double hairpin shaped wire spring 12, with the inner free endof the latter being slightly shorter than the outer adjacent, end (Fig,

i) and being capable of engaging the catch when said double hairpin-shaped wire spring is depressed, as will be explained more in detail hereinafter. spring 12 is inserted, at its bight, in a hole or eye 13 formed in a lug or ear 14 depending from a generally frustoconical collar member 15. This frusto'conical member 15 is arranged for sliding along the two parallel members 1 and 2 and, to this end, two arcuate slots 15' and 15" are provided in member 15 andslidably re-, ceive the elongated members 1- and 2. The frustoconical member 15 is biased downwardly by a helical spring 16 having its lowermost coil received in a small chamber" provided for this purpose in the frustoconical member 15. Further, the helical spring 16 is encircled by the two elongated parallel arcuate members 1 and 2. The uppermost coil of the helical spring 16 bears against the lower face, as viewed in the drawings, of a second generally cylindrical hollow body 17. The body 17 has arcuate slots slidably receiving the members 1 and 2 and is urged upwardly relative to the latter by the spring 16 so that body 17 normally encircles the generally rectangular ends 3 and 3' of the elongated members 1 and 2 respectively and also the outer generally cylindrical casing 4 of the ball bearing 5 located between said rectangular ends. It will be seen in the drawings that the ball bearing 5 can slide laterally between the open rectangular ends or jaws 3 and 3 when body 17is moved downwardly along the two elongated members 1 and 2, as in Fig. 2. The ball bearing is thus firmly embraced by the rectangular'ends 3 and 3' and by the generally cylindrical body 17 as well only when the latter is held by spring 16in its normal position (Fig. l).

Patented Max:115, 1? 60 The hairpin.

The very important dual function of the helical spring 16 can now be fully appreciated since this spring biases the frustoconical memberlSfdownwardly and also pushes the generally cylindrical body 1.7 upwardly to the position the catch 11 upon the subsequent downward movement of spring12 under the influence of coil spring 16.

In its. rest position, ends of the hairpin-shaped. catch: actuating spring 12 are lodged in the diametrical rectangular slot formed in body 6, The depth ofi said rectangular slot is selected so, thatthe endsof; the

hairpin-shaped spring 12 bear against; the bottom oh thercctangular slot 10 to limit thedownward, movement of memberwhen the latter is in its normal; position.

a n F gs- 2 3 of th d a s... it be no e a the. race oi the ball bearing 5 is formed by a; bear ing head' 18 of generally hemispherical; form with the lowermost part having a hexagonal outline so; as to be capable of engagement by a wrench. The uppermost part or extension 19 of the bearing head: 18 isscrewthreaded to facilitate the attachment of said head, and:

of the whole bobbin holder depending. therefrom, to a creelboard. A ball retaining. cage 21 encircles; the herni spherical portion of the bearing head 18 and cooperates therewith as the bobbin holderrotates due to the continuous pull imparted to the roving. on the bobbin. The cage 21 and the balls are housed and guided by the outer casing 4 which has been previously mentioned. The bobbin holder embodying theinvention is completed by a dust arrester disc which is slipped over the member 19 and has a diameter preferably slightly larger than that of the latterw The disc 20 freely rests on the uppermost edge of the cylindrical body 17 as can be clearly seen in Fig.1 of-the drawings. The disc 20 prevents the entry into the bearing 5 of dust, dirt and down, which are frequently present in textile factories.

The operation of the bobbin holder embodying the invention is as follows. Assuming that the threaded extension 19 of the bobbin holder has already been aflixed'. to a creel board, and that the points of the hexagonal. catch are within the elongated members 1 and 2 and do not protrude therefrom, as in Fig. 1, it will be suflicient to slipthe bore of. a bobbin on the lower end of the bobbin holder until the upper end of the bobbin pushes. the firustoco'nical member 15' upwardly against the force. of the helical spring, 16. On releasiug thebobbin after the member 15 has reached its uppermost position, the hairpin shapedv wire spring, 12 will descend anclactuate the catch so that the latter is turned through 90 degrees and its points then project laterally beyond the. members 1 and 2 below the bobbin. and the bobbin will be securely retained in position. A subsequent upward push imparted to the bobbin will, upon release of the bobbin, return the catch, 11 to the position of- Fig. l, and thereby permit, downward removal: of the bobbin from the bobbin holder. these, operations, the uppermost. coil of. the helical. spring 16 will, always. bear against the lowermost face ofthe cylindrical vbody 17 thus firmly retaining the ball bearing S'andrits associated 'partsin position. Having describedthe-operation of thebobbin holder embodying. the invention, it remains o'nly to. point out .the facility with which it can be.v disassembled. and. reassembled, to: ex ample; when. the; bobbin holder needs either cleaning or replacement or. repair of; some-parts;v

Assuming that the extension 19011 the bearing head is affixed to a creel board, it possible to remove there.- fromthe remainder of. the bobbin holder'while leaving the bearing hcadand its associated-ballbearingand ball It will be noted that, during 7 bearing casing in position, merely by depressing the cylindrical body 17 against the bias of the helical spring 16 so that the ball bearing casing 4 becomes accessible. Now it is only necessary to impart a slight lateral push to the casing 4 of the ball bearing to remove the latter from between the jaws 3 and 3' and thus the bobbin holder can be readily disengaged from the bearing head. The dismantling of the removed portion of the bobbin holder can now be eifected. First; the pin 8 is removed and thus, the lowermost cylindrical body 6 can be separated from the members 1- and- 2 so that the ends of the hairpin double spring 12 become visible since they are removed fromthe slot 10 of the body 6. Then, by gently pushing the two elongated members 1 and 2 apart from one another it is possible to disengage the shaft 11a of the catch and to remove it. The hairpin shaped spring 12, the frustoconical member 15, the helical spring 16,; and the cylindricalbody 17 can now be easily removed from the elongated members 1' and From the above, it can be appreciated that his possible" easily to dismembcr the bobbin holder. embodying the invention, while leaving" the bearing head 18 and its associated ball bearing 5' affix'ed to the creel board. This has the advantage, which is not shown by any of the hitherto known devices, that it is possible readily to clean the ball bearing, forexample by a compressed air blast, after removing'only the members 1 and 2 forming the body of the bobbin holder from the c'reel' board. The cleaning operation can thus be conveniently effected, as many times as necessary or desired, without being compelled to removeth'e wholebobbin holder from the creel board to which it is aflixed. A

The" bobbin holder embodying the invention further affords the possibility of making a number of component parts of the bfobbin holder described above of materials other than metals. For example, the cylindrical bodies 6 and 17, the fru's'foconical member. 1'5; and the body of the catch 11' can be" advantageously made of a plastic material having the necessary resistance to the mechanical stresses encountered by such parts of the bobbin holder. 7

Polyamides; phenolic resins, and. acrylates' are nonexhaustive examplesof the materials which could be usefully employed for the purpose above referred to and I do not intend to limit my invention to these materials in any wise. Some pieces can be made of die-cast light alloys" or stamped metals;

What'I claim is: I b

l. A bobbin holder comprising a" first part adapted to be normally attached to a creelfbo'ard and including a bearing head and a ball bearing mounted on said head; and a secondpart separable from saidfirst part and including. a pair of parallel,- sp'ac'ed apart elongated members adapted't'o have a bobbin disposed" slidably thereon and having jaws at one end opening toward each other and embracing said bearing with the latter being removable lat'erally' from betweeujs'aid' jaws to permit the separation of: said second part from said first part, a cylindrical member" slidable along said elongated members and opening.axially'toward said' one end of the latter so that, when said cylindrical member'is disposed at said oneend' of the elongated members, said cylindrical member surrounds said jaws with said bearing" thereb'et'ween and thereby prevents the lateral removal ofthe' hearing from between said jaws, a catch rotatably mounted between said elongated members for movement between a retracted position j within said elongated members and an operative position projecting laterally beyond said elongated members, a collar member slidable on" said elouga'tcd 'm'embers' between said cylindrical member and said catch and movable toward said one: end of the elongated member. by abobbin pushed'bn the latter over the opposite endof the elongated members-,a resilient catch actuating member carried by said collar member and operativej in: response te -movement of the latter firsttoward said one end and then toward said opposite end of the elongated members, to alternately displace said catch between said retracted and operative position, means limiting the movement of said catch actuating member and hence of said collar member in the direction toward said opposite end of the elongated members, and a single helical compression spring interposed between said cylindrical member and said collar member to normally urge said cylindrical member to said one end of the elongated members and said collar member toward said opposite end of the elongated members.

2. A bobbin holder as in claim 1; wherein said means limiting the movement of said catch actuating member includes a body having slots receiving said elongated members at said opposite end of the latter and a pin extending through said body and the elongated members in said slots to hold said elongated members against removal from said slots; and wherein said cylindrical memher and collar member also have slots slidably receiving said elongated members to cooperate with said slots of the body in normally holding said elongated members in parallel relationship.

3. A bobbin holder as in claim 2; wherein said catch is mounted on an axle having its opposite ends normally supported in openings of said elongated members and being removable from the latter upon spreading apart I of said elongated members following removal of said body from said opposite end of the elongated members, whereupon said cylindrical member and said collar members can be slidably removed from the elongated members at said opposite end of the latter.

References Cited inthe file of this pat ent UNITED STATES PATENTS 2,408,674 Noguera Oct. 1, 1946

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