Winding – tensioning – or guiding – Support for a strand material holder – For bobbins
Patent
1983-02-16
1985-04-16
Christian, Leonard D.
Winding, tensioning, or guiding
Support for a strand material holder
For bobbins
2421297, B65H 4902, D03J 508
Patent
active
045111022
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bobbin holder for use mainly in a creel of a textile machine, particularly a spinning frame or a roving frame. Further, the present invention can widely apply not only to a textile machine, but also to general industrial machines by applying and the developing this theory as the following illustration. There is a possibility that a distinguished merit of the rationalization is obtained when it is applied to an automatic warehouse, a successive transfer device, an automatic packing device, and the like.
BACKGROUND ART
A bobbin holder is one of key parts of a textile machine which is recently in general use. In the bobbin holder, a bobbin is inserted from the lower side of a hanging member of the bobbin holder. A pair of rockable elements separating right and left, which are contained in an inner portion of a hollow in the hanging member, are opened and projected in the right and left lateral direction. A shoulder of the bobbin is engaged with the rockable elements. When the bobbin is doffed from the bobbin holder, the projecting rockable elements automatically draw back into the hanging member in response to the doffing operation of the bobbin from the hanging member. Accordingly, the bobbin creel is simplified, and donning and doffing of the bobbin becomes easier.
All types of bobbin holders conventionally used are articles which suspend bobbins at two points by means of a pair of rockable elements. Accordingly, the support of the bobbin becomes unstable. It is difficult to keep the bobbin suspended and aligned with the center line of the hanger. Thus when the roving is withdrawn, the rotation of the bobbin is not smooth.
That is to say, movements of the bobbin such as eccentric rotation or precession are caused, so that the tension in the roving becomes uneven. For this reason, unevenness of yarn and breakage of roving occur. For preventing such, it is necessary to use a conical structure as an aligning compensating wedge jointly with the hanging member. However, the effect is not precise.
DISCLOSURE OF THE INVENTION
The present invention relates to a bobbin holder which is fundamentally improved in construction and structure by considering the disadvantages of those conventional bobbin holders. The key point of the invention is the reform of fundamental structure to provide a self-aligning system which aligns the rotational axes of constituent elements to a predetermined vertical axis by a self-balancing action caused by gravitation when the bobbin holder is in working under full load. That is, a self-aligning suspension system is provided with similar radial three-point bobbin support using blades.
The effects of the present invention which are greatly excellent in comparison with that of the conventional bobbin holder are as follows:
(1) A bobbin is vertically suspended with certainty by the bobbin holder which has a sensitive and proper self-aligning function. In this manner, the bobbin is smoothly rotated around the center axis of the bobbin holder without producing improper rotation such as eccentric rotation or precession corresponding to the draw-out velocity of roving. Accordingly, the tension of the roving remains even and the bobbin holder of the present invention can satisfactorily prevent the occurance of unevenness of yarn or breakage of roving.
(2) The three-point support using a set of rockable elements has the same effect as the three-point supporting system using balls which is a sister article of the present system, and it can be considered that they are the same in the point of self-aligning function. In the rockable opening-closing system, as its merit, it is possible to enlarge the projecting length of the rocking members projecting from the outer surface of a cylinder of a hanging member. Therefore, it is commonly and generally applicable to every size of the bobbin bore in comparison with the three-point bobbin supporting system using balls. Also, it has the same quality, intensity and endurance as the three
REFERENCES:
patent: 3743211 (1973-07-01), Imai et al.
patent: 3877659 (1975-04-01), Takata
patent: 4015797 (1977-04-01), Tsukumo
patent: 4052021 (1977-10-01), Tsukumo
Tsukumo Masae
Tsukumo Shinsuke
Tsukumo Zenzaburo
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