Textiles: weaving – Fabric manipulation – Take-ups
Patent
1990-10-10
1993-02-09
Falik, Andrew M.
Textiles: weaving
Fabric manipulation
Take-ups
139 1R, 384436, 242 551, 403330, D03D 4920, D03D 4900
Patent
active
051846500
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a bearing for a cloth beam of a loom.
In most looms, the warp yarns are wound on warp beams and brought to a loom to be woven and the warp beams, may be of substantial dimensions and weight. At the loom end remote from the warp beam, the woven cloth is wound on a cloth beam which is removed from the loom periodically when the cloth beam has reached its maximum permissible diameter. The cloth beam usually has to be changed several times during the weaving of the warps of a single warp beam and if at all possible the loom should not have to be stopped for cloth beam changing.
Considerable importance therefore attaches more particularly to the mounting of the cloth beam. First, the mounting should be such that the cloth beam journal cannot slide out of its bearing while cloth is being wound on. On the other hand, it should be possible to remove the cloth beam rapidly since the time available in known looms for cloth beam changing is limited.
For example, U.S. Pat. No. 3,884,274 discloses a cloth beam bearing in the operative position of which a sleeve for bearing journals bears on a bolt or the like. The bolt, in turn, rests on a pedestal movable by a screwthreaded spindle which is rotated to either raise or lower the bolt by way of the pedestal. Considerable time is required to turn the spindle; also, it would be impossible to have automatic removal of the cloth beam by a robot in the manner disclosed in EP-A-0 296 115, separate controls having to be provided to actuate the spindle.
It is an object of the invention to devise a loom of the kind set out in which the cloth beam can be secured in its bearing in a simple manner and release of such securing is simplified and should be performable by automatic removal devices.
Briefly, the invention provides a bearing for a cloth beam of a loom wherein the cloth beam has journals for rotatably mounting the cloth beam in place. In accordance with the invention, the bearing has a bearing table having a bearing shell for rotatably receiving a journal of a cloth beam and a recess extending from the shell. In addition, a tongue is secured at one end to the table and extends within the recess with a nosing facing the shell for slidably engaging a cloth beam journal received in the shell. Still further, a means is provided for moving the tongue between a first position in the recess to permit movement of a cloth beam journal into and out of the shell and a second position out of the recess to slidably engage the nosing with a cloth beam journal in the shell.
In one embodiment, the tongue is resilient and is rigidly secured to the table at one end. In this embodiment, the tongue may be curved so as to occupy the second position when at rest. Thus, the tongue can be restored automatically to this closed or locking position, and thus, requires no adjusting elements of its own for this purpose. In addition, an arm extends from the nosing through the table and has a support surface for engaging the table in the second position (closed position) of the tongue in order to counteract movement of the tongue from the second position in a direction opposite from the first position.
In another embodiment, a spring is disposed between the table and the tongue for biasing the tongue from the first position (opening position) into the second position (closed position).
Preferably, the arm which extends downwardly out of the recess is connected to a lever for release. The idea is more particularly not automatic but manual release. In one embodiment, the lever is pivoted to the table at a pivot place and engages the tongue arm at one end of the tongue by way of a pivot arm. The other part of the lever beyond the pivot place is in the form of a grip; corresponding means for locking the grip in a predetermined required position are of course feasible.
However, for automatic cloth beam removal a finger is associated with the tongue and presses the same into the recess. This can occur, for example, in dependence upon the movement of a cloth beam extractor disclosed in
REFERENCES:
patent: 1803286 (1931-04-01), Thatcher
patent: 2510454 (1950-06-01), Zabriskie et al.
patent: 2989257 (1961-06-01), Schuler et al.
patent: 3532137 (1970-10-01), Fransen
patent: 3884274 (1975-05-01), Sujdak
Falik Andrew M.
Sulzer Brothers Limited
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