RU2299282C1 - Back rest apparatus for spinning machine - Google Patents

Abstract

FIELD: textile engineering, in particular, equipment used in spinning machines.

SUBSTANCE: back rest for spinning machine has tubular member mounted on bed frame and supporting member fixed to tubular member, said members being positioned along width of spinning machine. Tubular member is positioned on outside of machine and supporting member is made in the form of curved flexible plate facing with its convex part inward of spinning machine. Multiple-layer cylindrical enclosure is put onto back rest apparatus, with inner layer of enclosure being made of anti-friction material and outer layer being made of friction material. Supporting member contacts with one or several flat springs at site where it is attached to tubular member facing inward of spinning machine. Area of flat spring portions contacting with supporting member and with each other may be adjusted. Tubular member has rigidly fixed outside annular guides arranged along width of cylindrical enclosure in planes perpendicular to axis of tubular member. Annular guides are arranged so that their position through the width of spinning machine may be adjusted.

EFFECT: increased efficiency through maintaining constant flexibility of back rest during the entire spinning process and reduced abrasion wear and tendency to electrolysis of threads and back rest apparatus.

5 cl, 3 dwg

Description

The invention relates to weaving machinery, can be used on a loom and allows you to get a more uniform weft fabric.

Known rock loom [1], which due to the design features has elastic properties that create a positive effect in the production of terry fabrics. Its disadvantages are:

1. The restrictions imposed on the assortment of produced fabrics and caused by the elasticity of the type of rock used.

2. The constant functioning from the beginning to the end of the weaving process.

3. The occurrence of an electric charge during prolonged sliding of warp along the surface of the rock.

4. Abrasive wear of the rock and threads during this slip.

The closest adopted for the prototype is the rock [2]. The rock device comprises a bed on which, by means of two corners or bases, a tubular-shaped support element is fixed. The rock is mounted on this element by means of articulated joints, and between the inner surface of the rock and the supporting element there is an elastic element formed by a flexible shell filled with air under pressure. Its disadvantages are the disadvantages noted above in paragraphs 2, 3, 4.

In addition, for the functioning of the rock, it is necessary to have a special pneumatic system that provides the required air pressure inside the elastic element.

The technical result of the proposed device rock - maintaining the elastic properties of the warp constant throughout the entire process of weaving and reducing abrasion and electrification of threads and device rock.

An additional technical result is an increase in the assortment of the resulting fabrics, an improvement in the operational properties and reliability of the device.

The specified technical result is achieved by the fact that:

- the device of the rock loom consists of a tubular support rigidly mounted on the bed and fixed on it, installed along the width of the machine, the tubular element is located on the outside of the machine, and the support, made in the form of a curved plate of elastic material, faces its convex part inside the machine moreover, a multilayer cylindrical shell is put on the device, the inner layer of which is made antifriction, and the outer one is friction;

- the supporting element is in contact with one or more flat springs in the place of its attachment to the tubular element facing the inside of the machine;

- flat springs are made adjustable in contact area with the support element and with each other;

- the outer part of the tubular element has a rigidly fixed annular guides installed along the width of the cylindrical shell in planes perpendicular to the longitudinal axis of the tubular element;

- annular guides are installed with the possibility of regulating their position along the width of the machine.

To compensate for the decrease in the elastic properties of the warp threads during weaving, a support element is introduced that has elastic properties that are set by the proposed method so that as the diameter of the winding decreases, the arc of coverage of the support element with warp threads coming from the Navoi increases. This causes an increase in the normal pressure of the threads and, consequently, the displacement of the support element (for example, during shedding). Thus, as the weaving navoi is triggered, the elasticity of the support element increases, which compensates for the decrease in the elasticity of the warp in the zone of the navoi - the edge of the fabric by reducing the diameter of the navoi.

The introduction of a cylindrical shell moving along with the threads (the inner layer of which is antifriction and the outer one is friction), worn on the tubular and supporting elements, can significantly reduce the abrasive wear of the threads and the rock, as well as the electric charge acquired by the warp threads when moving in the rock zone.

The introduction of one or more flat springs installed in height into the device allows you to adjust the area of their contact with the support element and with each other and thus obtain the required elasticity of the support element, which depends on the type and number of threads of the processed base.

Ring-shaped guides, rigidly fixed on the outer part of the tubular element and installed along the width of the cylindrical shell in planes perpendicular to the longitudinal axis of the tubular element, are necessary so that this shell does not "go" to the side along the longitudinal axis of the tubular element from - almost always there is some misalignment of the navoi, the tubular element and the chest of the loom.

Depending on the width of the weaving, the distance between the disks of which can be adjusted and set taking into account the width of the fabric, ring-shaped guides are also installed taking into account the possibility of adjusting their position along the width of the machine.

In the work of prof. V.A. Gordeeva [3] indicated that during the operation of the loom, the elasticity of the warp from the navoi to the edge of the fabric decreases with a decrease in the radius of winding of the threads on the navoi. According to our calculations, conducted according to the formulas of prof. Gordeeva V.A., this decrease is at least 22% [4].

As you know, the main regulators of different types contribute to maintaining a constant (within certain limits) average for a cycle of tension of the warp threads. They do not regulate the elasticity of the base.

A rock loom device is proposed where such regulation takes place.

Figure 1 shows a structural diagram of a rock, a cross section; figure 2 is the same, view A; figure 3 - distributed load of the normal pressure of the threads on the outer surface of the shell.

The rock device comprises a bed 1, on which bases 2 are fixed with a tubular 3 element located on the outside of the machine. The supporting 4 element, made in the form of a part of a cylindrical shell of elastic material, is rigidly connected with its longitudinal edges to the tubular 3 element using screws 5 from the outside and bolts 6 from the inside of the machine. A cylindrical shell 7 is put on the tubular 3 and supporting 4 rock elements, the width of which corresponds to the filling width of the machine. The shell 7 is held in tension by means of a wave-shaped spring 8. I and III - the position of the warp threads in the bulk section - the device of the rock at the beginning and end of the weaving process; II - position in some intermediate stage of this process.

A part of the supporting element 4 located on the inside of the machine is supported (for the case of two springs) by flat springs 9 and 10, which are pressed against the tubular 3 element by means of a rack 11 with bolts 6. The heads of the bolts 6 are located in cylindrical recesses 12.

The recess DE, made along the tubular 3 elements at a distance corresponding to the filling width of the machine, ensures the functioning of the supporting 4 elements from the beginning of the weaving process. The springs 9, 10 are installed in positions that ensure the elasticity of the support 4 element, respectively, of the previously known elasticity of the base. (If these springs are removed from the bed 1, then the system supporting element - springs 9, 10 has maximum elasticity, if close - the minimum). For a more accurate installation of the springs 9, 10 on them and on the tubular 3 element there are horizontal marks indicated by numbers.

To limit the axial movements of the cylindrical shell 7 there are ring-shaped guides 13, which are rigidly fixed with screws 14 to the tubular 3 element on the outside of the machine.

When the loom is operating at the very beginning of the weaving process, the support system 4 element - springs 9, 10 does not function. This is not necessary, since the compliance of the warp threads in the zone of the navoi is the maximum edge of the fabric.

нитей основы, огибающих цилиндрическую оболочку 7 по дуге АС. В результате нити основы вместе с подвижной оболочкой 7 перемещаются в направлении к опушке ткани.At the time of yawning, an increase in tension

warp envelopes enveloping the cylindrical shell 7 along the arc AC. As a result, the warp yarn together with the movable sheath 7 moves towards the edge of the fabric.

уменьшается, и нити основы с оболочкой 7 перемещаются в противоположном направлении.After yawning, the value

decreases, and warp with sheath 7 are moved in the opposite direction.

In the intermediate stage of the weaving process (warp threads going from the navoi to the rock are in position II), the compliance of warp threads due to the actuation of the weaving navoy becomes less, and the arc AB around them of the cylindrical shell is greater (arc increment is its portion of the aircraft).

нитей основы, и за счет увеличения распределенной нагрузки

нормального давления нитей основы на участке ВС (фиг.3) опорный 4 элемент на этом участке перемещается к трубчатому 3 элементу, компенсируя этим перемещением уменьшение податливости нитей основы.At the time of yawning, an increase in tension

warp threads, and by increasing the distributed load

normal pressure of the warp threads in the aircraft section (FIG. 3), the supporting 4 element in this section moves to the tubular 3 element, compensating for this decrease in the flexibility of the warp threads.

на опорный 4 элемент и больше перемещение участка ВС к трубчатому 3 элементу, компенсирующее уменьшение податливости нитей основы за счет добавления к этой податливости опорного 4 элемента.The smaller the diameter of the navoi, the larger the portion of the aircraft (compare the provisions of II and III warp threads), the greater the effect of the distributed load

on the supporting 4 element and more, the movement of the BC section to the tubular 3 element, compensating for the decrease in the flexibility of the warp threads by adding the supporting 4 element to this compliance.

Thus, the flexibility of warp yarns in the navoi zone - the edge of the fabric throughout the entire weaving process remains approximately constant.

This contributes to a uniform weft fabric. In addition, during the entire weaving process, the nature of the change in the tension of the warp threads inside the cycle (between the two surfs) changes slightly, which helps to reduce the breakage of the warp threads, increase the CPV of the machine and obtain better fabric.

Information sources

1. A.S. 465012 USSR, M. Cl. D03d 39/22, D03d 49/22. Cliff to the loom for the production of terry fabrics / Foreigner Erwin Pfarrvaller (Switzerland). - publ. 03/25/75 Bull. No. 11. - 5 sec.

2. A.S. 1595961 USSR, MKI D03D 49/14. The device is rock / L.A. Makarov (USSR). - publ. 09/30/90, Bull. Number 36. - 6 p.

3. Gordeev V.A. Dynamics of mechanisms of tempering and tension. - M.: Light Industry, 1965. - P.74, 82-84, 112.

4. Makarov L.A. and others. To maintaining the filling length of the base in the weaving process // Interuniversity collection of scientific papers dedicated to the 70th anniversary of the Moscow Textile Institute. A.N. Kosygina / Moscow Textile Institute. - 1989. - P.92.

Claims (5)

1. The rock device of the loom, consisting of a tubular support rigidly mounted on the bed and fixed thereon, installed along the width of the machine, characterized in that the tubular element is located on the outside of the machine, and the support, made in the form of a curved plate of elastic material, facing its convex part inside the machine, and the device is worn with a multilayer cylindrical shell, the inner layer of which is made antifriction, and the outer one is friction. 2. The rock device of the loom according to claim 1, characterized in that the supporting element is in contact with one or more flat springs in the place of its attachment to the tubular element facing the inside of the machine. 3. The rock device of the loom according to claim 2, characterized in that the flat springs are made adjustable in contact area with the support element and with each other. 4. The device of the rock loom according to claim 1, characterized in that the outer part of the tubular element has a rigidly fixed ring-shaped guides installed along the width of the cylindrical shell in planes perpendicular to the longitudinal axis of the tubular element. 5. The device of the rock loom according to claim 4, characterized in that the annular guides are installed with the ability to adjust their position along the width of the machine.

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