Textiles: weaving – Warp manipulation – Shedding
Patent
1993-03-29
1994-10-04
Falik, Andrew M.
Textiles: weaving
Warp manipulation
Shedding
D03C 906
Patent
active
053517199
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a heddle frame with detachable edge connections between the side supports and the frame staves consisting of hollow profiles, where at each edge joint a projection formed at the side support engages peg-like into a hollow space thereof and is clamped down by means of a screw.
2. Description of the Related Art
As is generally known, preferably light metal is nowadays used due to weight reasons, for the production of heddle frames. Such light metal, however, has the property that the alternating bending strength of this material, drawn as curve over the number of load changes, decreases continuously, unlike the case with steel after having reached a certain limit value. In the of light metal, due to the continuously dropping curve, a rupture of the material due to higher loading can happen at any time. The higher loading is caused to technical improvements that results in continuously increased speed of the weaving machines, in which the heddle frames are moved upwards and downwards. As a consequence load changes are produced on the heddle frames. At the current speeds of over 1000 movements per minute it is possible that ruptures can occur at the side supports, specifically below the peg-like projection that extends from a heddle frame side support.
SUMMARY OF THE INVENTION
The present invention has as an object to avoid ruptures of heddle frame material by means of structural measures. In order to meet this object the heddle frame includes spaced side supports and frame staves extending between the side supports. The frame staves include a hollow space at each end, and the side supports each have a projection mounted thereto, which projections are received in respective hollow spaces of the frame staves to permit connections between the side supports and the frame staves. Each projection includes a first rigid body securely mounted to a respective side support and also includes an opening. A second rigid body is provided and has a first portion adapted to be loosely received within the opening in the first rigid body. The second rigid body also includes a second portion overlying at least a part of the outer surface of the first rigid body. An elastic vibration damping element is positioned within the opening in the first rigid body, between the first portion of the second rigid body and the first rigid body. A clamping member is provided to connect the frame stave with the second portion of the second rigid body, for clampingly holding the second rigid body within the hollow space of the frame stave. Numerous embodiments of the invention are possible, and examples of these embodiments will be explained hereinbelow greater in detail greater based on the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
There is illustrated in:
FIG. 1 is a fragmentary elevational view of the upper end of a heddle frame side support with a projection serving for mounting with a frame stave;
FIG. 1a is a fragmentary elevational view of a modified embodiment of the heddle frame side support shown in FIG. 1;
FIG. 2 is a vertical section through the projection taken along the line 1--1 of FIG. 1;
FIG. 3 shows a further modified embodiment of the projection formed at the side support, and also the mounting with a frame stave of a heddle frame;
FIG. 4 shows a third modified embodiment of the side support projection;
FIG. 5 shows a fourth modified embodiment of the side support projection;
FIG. 6 is a vertical section through a damper element taken along the line 3--3 of FIG. 5;
FIG. 7 shows a fifth modified embodiment of the side support projection;
FIG. 8 shows an end vertical view of only the sheet metal over of the projection shown in FIG. 7;
FIG. 9 is an elevational view of the damper elements used in the embodiment according to FIG. 7 positioned in the corners of a star-shaped disk body;
FIG. 10 shows an end vertical view of the arrangement of FIG. 9;
FIG. 11 shows a fragmentary end vertical view of the side support and projection shown in FIG. 7;
REFERENCES:
patent: 4275772 (1981-06-01), Shimizu
patent: 4349052 (1982-09-01), Yaji et al.
patent: 4741367 (1988-05-01), Kitawaki
patent: 4832088 (1989-05-01), Palau
patent: 4883095 (1989-11-01), Maruyama et al.
patent: 5004019 (1991-04-01), Blontrock
patent: 5005607 (1991-04-01), Shimizu
Falik Andrew M.
Grob & Co. Aktiengesellschaft
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