WO2001032967A1

WO2001032967A1 - Shaft rod of a heald frame of a weaving machine with a support for heald holder

Info

Publication number: WO2001032967A1
Application number: PCT/CZ2000/000082
Authority: WO
Inventors: Josef DVOŘÁK; Walter Seibt
Original assignee: Vúts Liberec A.S.
Priority date: 1999-11-04
Filing date: 2000-11-03
Publication date: 2001-05-10
Also published as: CZ9903914A3; AU1017501A; CZ288114B6

Abstract

The invention relates to a shaft rod (1) of a healdframe of a weaving machine with a support (4) for a holder (5) of healds (6) comprising a hollow profile carrier beam. The fixing part (40) of the support (4) for the holder is situated in the cavity (10) of the shaft rod (1) spaced from its walls (12), and the free space between the walls (12) of the shaft rod (1) and the fixing part (40) of the support (4) for the holder (5) of the healds (6) is filled with elastic material.

Description

Shaft rod of a heald frame of a weaving machine with a support for heald holder

Technical field

The invention relates to a shaft rod of a heald frame of a weaving machine with a support for heald holder comprising a hollow profile carrier beam.

Background art

There are known shaft rods of a heald frame of a weaving machine consisting of a hollow profile carrier beam making the lower and upper sides of the shaft frame of a heald frame. The ends of the two shaft rods are connected by lateral walls of the shaft frame. The lower or the upper shaft rod is fitted with one ore more eyelets by which it is connected with a shed mechanism adapted to produce the shed during the weaving process. Each shaft rod is on its outer side fitted with a shaped lug carrying a number of riders mounted, and as a rule adapted to move, along the length of the shaft rod and carrying a heald holder situated and fixed on the riders. The heald ends are fitted with hooks by means of which they are in a well-known manner mounted on the heald holder of the lower and upper shaft rods. Between their ends, the healds are fitted with eyelets through which the warp threads pass.

The elasticity of the warp threads and the dynamic forces acting on the heald frame during the weaving process result in deformations of the shaft rods of the shaft frame. To prevent these deformations from exerting excessive strain on, and causing the subsequent distortion of, the healds, the play between the heald hooks and the heald holders must be superior to the size of the deformation of the shaft rods. However, the reversing character of the healdframe motion results in perpetual variations both of the sense and value of the acceleration and of the sense and value of strain imposed both on the shaft frame and the healds. The healds are thus in perpetual variation fixed to the heald holder of the upper or lower shaft rod of the healdframe, and a corresponding perpetual, shock-type variation takes place in the above mentioned plays between the heald hooks and their holder. These shock-type effects generate in the shaft frame tension and acoustic waves which lead to the desctruction of the shaft frame and also produce noise threatening the health of the weaving machine operators. These shock-type effects of the healds are transmitted by the profile carrier beam to the surrounding area and are accompanied by resonance processes.

There is known only one method of suppressing the noise of the shaft frame of the healdframe with shaft rods coming from the hollow profile carrier beams fitted with riders carrying a heald holder. It consists in the filling of said shaft rod cavity with foamed polyurethane but this solution does not permit to reduce the play between the heald eyelets and their holder and thus to reduce said shocks during the weaving machine operation. It only suppresses some vibrations and resonance effects of hollow profile shaft rods. The noise level still remains excessive and violates the hygienic standards.

The invention aims to propose a shaft rod of a healdframe of a weaving machine permitting to reduce the noise level of the healdframe of a weaving machine during the weaving machine operation.

Principle of the invention

The target of the invention has been achieved by a shaft rod of a healdframe of a weaving machine with a support for heald holder whose principle consists in that the fixing part of the support for the heald holder is situated in the cavity of the shaft rod spaced from the shaft rod walls and that the free space between the shaft rod walls and the fixing part of the support for the heald holder is filled with elastic material.

This seating of the support for the heald holder reduces the shock effect of the movement of the heald eyelets on the heald holder by transmitting their shock energy into the deformation energy of the elastic buffer. This seating of the support for the heald holder also reduces the noise level of the healdframe during the weaving process.

In a preferred embodiment, the fixing part of the support for the heald holder of the shaft rod passes into the supporting section of the support for the heald holder which in its turn passes through the orifices in the shaft rod wall to the outer side of the shaft rod.

This embodiment of the shaft rod with the support for the heald holder is simple, highly functional, and reliable.

The fixing part of the support for the heald holder is preferably made as a flat belt, and the supporting section of the support for the heald holder consists of flat brackets situated next to each other along the length of the fixing part.

The support for the heald holder arranged in this way is functional and easy to manufacture.

The elastic material can be preferably Vulcolane or vulanized rubber. Each of these two materials fulfils the requiremts put on its fitness for production, durability, and rigidity of the seating of the support for the heald holder in the shaft rod cavity.

Description of the drawings

The invention is schematically shown in the drawing in which Fig. 1 is a front view of a shaft frame of a healdframe, Fig. 2 a cross section of the shaft rod of the healdframe with the heald support and a heald mounted on it with one end, and Fig. 3 a longitudinal section of the shaft rod.

Examples of embodiment of the invention

The shaft rod of the healdframe of a weaving machine with a support for a heald holder is a component of a shed-producing device on a weaving machine. The healdframe comprises a pair of parallel shaft rods 1_ connected on their ends by side walls 2 situated perpendicularly to the shaft rods 1_. The shaft rods make together with the side walls 2 the shaft frame of the healdframe, see Fig. 1. At least one of the shaft rods 1 is fitted with suspension eyelets 3 for connecting the healdframe with a well-known not represented shed mechanism of the weaving machine.

The shaft rod Λ consists of a hollow carrier beam. Situated in a cavity 10 of the shaft rod 1 is a fixing part 40 of a support 4 for a holder 5 of healds 6. The fixing part 40 of the support 4 is followed by a supporting section 41 of the support 4 for the holder 5 of the healds 6 passing through an orifice 11. or a system of orifices 1_1 in the wall 12 of the shaft rod 1_ out of the cavity 10 of the shaft rod ± onto the side of the shaft rod 1 situated on the inner side of the shaft frame of the healdframe. The supporting section 41 of the support 4 for the holder 5 of the healds 6 is in one of well-known methods adapted to receive the holder 5 of the healds 6, for instance by riveting. Each heald 6 is fixed to the holder 5 in a well-known way by its hook 60 and is fitted with an eyelet 61 for the warp thread.

The fixing part 40 of the support 4 for the holder 5 of the healds 6 is in the cavity 10 situated without contact with the walls 12 of the shaft rod 1_, and free space between the walls 12 of the shaft rod Λ_ and the fixing part 40 of the support 4 for the holder 5 of the healds 6 is filled with elastic material such as Vulcolane or rubber with subsequent vulcanization. The elastic material thus acts as elastic buffer for shocks the holder 5 of the healds 6 is exposed to, absorbs the deformations and oscillations of the shaft frame of the healdframe and reduces the noise level of the healdframe.

In the shown example of embodiment, the support 4 for the holder 5 of the healds 6 is made as a flat belt fitted with brackets alongside its length. The flat belt acts as the fixing part 40 of the support 4 for the holder 5 of the healds 6, and the brackets form the supporting section 41 of the the support 4 for the holder 5 of the healds 6. The brackets of the flat belt pass out of the cavity 10 of the shaft rod Λ through the orifices 11. in the wall 12 of the shaft rod ± on the inner side of the shaft frame of the healdframe. In a not shown example of embodiment the support 4 of the holder 5 of the healds 6 is made as another suitable body seated by means of some elastic material in the cavity 10 of the shaft rod 1 without contact with the walls 12 of the shaft rod ±. The support 4 for the holder 5 of the healds 6 can consist for instance of a plurality of separate flat pieces situated next to each other alongside the length of the shaft rod Λ_, each of them fitted with a bracket, or it can be made as a body or a system of bodies of another suitable shape.

Claims

PATENT CLAIMS

1. A shaft rod of a healdframe of a weaving machine with a support for a heald holder comprising a hollow profile carrier beam, characterized by that the support (4) for the holder (5) of the healds (6) has a fixing part (40) situated in the cavity (10) of the shaft rod (1 ) spaced from the shaft rod walls (12) and that the space between the shaft rod walls (12) and the fixing part (40) of the support (4) for the holder (5) of the healds (6) is filled with elastic material.

2. A shaft rod as claimed in Claim 1 , characterized by that the fixing part (40) of the support (4) for the holder (5) of the healds (6) passes into a supporting section (41 ) of the support (4) for the holder (5) of the healds (6) which in its turn passes through the orifices (11 ) of wall (12) of the shaft rod (1 ) to the outer side of the shaft rod (1 ).

3. A shaft rod as claimed in Claim 2, characterized by that the fixing part (40) of the support (4) for the holder (5) of the healds (6) is made as a flat belt and the supporting section (41 ) of the support (4) for the holder (5) of the healds (6) consists of flat brackets situated next to each other along the length of the fixing part (40).

4. A shaft rod as claimed in any of Claims 1 to 3, characterized by that the elastic material is Vulcolane.

5. A shaft rod as claimed in any of Claims 1 to 3, characterized by that the elastic material is vulcanized rubber.