Textiles: weaving – Warp manipulation – Shedding
Reexamination Certificate
2000-10-26
2001-10-16
Falik, Andy (Department: 3741)
Textiles: weaving
Warp manipulation
Shedding
C024S614000
Reexamination Certificate
active
06302154
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a device for connecting springs associated with a harness of a weaving loom of the Jacquard type on a frame of such a loom, to a connection assembly comprising such a device, and to a weaving loom of the Jacquard type incorporating such an assembly.
2. Description of Related Art
Each hook of a Jacquard system is known to be associated with one or more cords, the cords together constituting the harness of the system. Each cord is connected to the upper end of a heddle provided with a mail for controlling the position of a warp yarn of the loom in a substantially vertical direction. The lower end of each heddle is connected to an anchoring point, fixed with respect to the frame of the loom, by a spring exerting an elastic return force on the heddle.
EP-A-0 678 603, for example, discloses providing a device for connecting the lower end of a helical spring and the frame of a loom by means of a threaded joining piece intended to be screwed in the coils or turns of the spring and comprising two elastic branches adapted to cooperate with the coils or turns of the spring to generate friction to avoid resonance of the latter. This document provides an individual fixation of the connection device on the frame by means of a joining piece in the form of a harpoon, which involves long and fastidious manipulations and accordingly renders the equipping of a weaving loom of Jacquard type with devices of this type more expensive. In case of dismantling, each joining piece must be dismantled individually and it is not rare for joining pieces to deteriorate.
It is known, for example by DE-U-86 09665, to group together connection devices on a base extending in a rod provided with a head in the form of a harpoon for hooking thereof on a harness board. Such devices are difficult to unhook and their density of implantation, in particular on an elongated section, cannot be high.
It could be envisaged to group together the connection devices, for example in series of four on a base presenting a central orifice in which is introduced a bar supported above the frame. Although presenting advantages over the known art of EP-A-0 678 603, this system and the known one of DEU-86 09665 involve removing a large number of devices from the bar in order to have access to a device having to be changed during a maintenance operation, which proves to be long, fastidious and expensive due to the need for highly qualified manpower. Similarly, it is a complex operation to assemble a weaving loom incorporating this device. In addition, flock tends to accumulate between the devices of this type and it is delicate to clean them.
It is a particular object of the present invention to overcome these drawbacks by proposing a spring connection device which comprises a plurality of rods each equipped with means for connection with a spring and extending from a common base.
SUMMARY OF THE INVENTION
According to the invention, such a device is characterized in that the base is provided with hooks each adapted to cooperate with a beak of corresponding shape for elastic hooking and unhooking of this device on and from at least one elongated section.
Thanks to the invention, the fastening formed by the base and the different rods that it supports may be installed on the section particularly rapidly and dismantled equally rapidly, without requiring concomitant assembly or dismantling of the adjacent fastenings. The different rods of a device may be mounted and dismantled in groups with respect to the weaving loom. The flexible hooks and the beaks allow rapid elastic hooking and unhooking on or from the elongated sections.
According to advantageous but non-compulsory aspects of the invention, the device incorporates one or more of the following characteristics:
The base is substantially planar and adapted to be arranged in a direction substantially perpendicular to a longitudinal direction of the section. The planar nature of the base makes it possible to juxtapose the fastenings in the longitudinal direction of the section with a higher density of the rods intended to cooperate with the springs of the harness. All the springs of the same column located in the harness board depth may be provided to be grouped together on the same fastening disposed in the direction of advance of the warp yarns, while the section extends in a direction substantially parallel to the weft yarns.
The rods are juxtaposed essentially along a principal plane of the base. In other words, the rods form a substantially planar lap extending the base.
The base is pierced with a central orifice constituting a handle for gripping the device, for example for positioning it on a section.
The hooks and the beaks are oriented so that their respective contact surfaces are included in the thickness of the base, which makes it possible to juxtapose the bases, and consequently the rods, with a high density.
The base comprises at least one maneuvering element defining a zone of reception of part of a tool for unhooking the device with respect to the elongated section.
The device comprises at least one positioning tongue adapted to cooperate with a guiding member secured to the elongated section. This tongue and member make it possible to arrange the different devices with a predetermined pitch defined by this member.
The invention also relates to an assembly for connection of the springs of harness of Jacquard type, which comprises a plurality of devices as described hereinbefore and at least one elongated section fast with the frame of the loom and defining, in a transverse section, at least one beak adapted to cooperate with the hooking means provided on these devices. In addition, at least one spacer bar may be provided to be immobilized on the section and presenting zones for receiving part of the bases of these devices, with a predetermined spaced apart relationship in the longitudinal direction of the section.
Finally, the invention relates to a weaving loom of Jacquard type comprising an assembly as described hereinbefore. Such a weaving loom is relatively easy to assemble and maintain, while being as efficient as the known looms and its cost price and maintenance costs being substantially lower than known looms.
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patent: 5636663 (1997-06-01), Lacroix
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Bassi Dario
Vessella Patrick
Dowell & Dowell , P.C.
Falik Andy
Staubli Lyon
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