CN107338549B

CN107338549B - Heald shaft and method for producing a heald shaft

Info

Publication number: CN107338549B
Application number: CN201710295312.3A
Authority: CN
Inventors: S.凯勒; B.普费弗; M.古森科; C.格特
Original assignee: Groz Beckert KG
Current assignee: Groz Beckert KG
Priority date: 2016-05-02
Filing date: 2017-04-28
Publication date: 2021-10-22
Anticipated expiration: 2037-04-28
Also published as: EP3241932A1; CN107338549A; EP3241932B1

Abstract

The invention relates to a heald frame and a manufacturing method for a heald frame. Heald shaft having the following features: at least two frame rods, which extend substantially in the longitudinal direction of the heald frame. At least one side support, which extends essentially in the height direction of the heald frame and at least two frame rods are arranged at a distance in the height direction at the at least one side support. At least one of the side supports is equipped with a flange which extends substantially in the longitudinal direction of the heddle frame. The at least one first frame bar is constructed of a light metal and has a cross-sectional profile that bounds at least two chambers. At least one fastening means releasably locks the flange on the frame bar. At least one chamber has a height which corresponds to at least 30%, preferably at least 35% and particularly preferably at least 40% of the height of the frame rod. The flanges of the side supports engage into the chamber and fill the chamber in the height direction of the heddle frame at least in the region of the longitudinal extension of the heddle frame.

Description

Heald shaft and method for producing a heald shaft

Technical Field

The invention relates to a heald frame for modern, fast-running knitting machines and to a method for producing said heald frame.

Background

Heald frames for modern, fast-running braiding machines usually comprise, inter alia, a frame rod (Schaftstab), which is made of aluminum as an extruded profile, and side supports, which are likewise made of aluminum. The connection portion of the frame bar and the side support is called a corner connection portion. The corner connection is usually the starting point for a failure of the heald frame in operation. This is due, on the one hand, to the large forces arising from the exceptional accelerations to which the heddle frame is subjected during weaving, which forces have to be absorbed in the spatially restricted regions of the corner connections. On the other hand, the corner connection must be able to be quickly and easily disconnected and closed, so that only one single threaded fastener is usually used. The starting point for failure of the corner joint can be an aluminum profile of the frame bar in the region of the corner joint, but also side supports or threaded fasteners. The corner connections of heddle shafts are known in a number of variants.

CH427688 shows a steel frame rod as it is only used today sometimes still in slow-running braiding machines, such as projectile braiding machines. The steel profile has a ratio of its mass to its rigidity which is not able to withstand the loads during operation in modern braiding machines, also in modern sandwich braiding machines which have already worked relatively slowly. This document shows a first example of a corner connection using a threaded fastener under a tensile load in the closed state of the corner connection. The angle connection with a threaded fastener pretensioned in tension has proven to be more stable than embodiments in which the threaded fastener is pretensioned under a compressive load.

DE10116813a1 shows a corner connection with a tensioned threaded fastener, which is designed for the loads on modern knitting machines. However, the side supports have flanges (Lappen) which can break off under high loads due to shear forces, since the surface regions which carry such loads are dimensioned small due to the small height of the flanges.

Disclosure of Invention

Starting from this prior art, the object of the invention is to provide a heddle frame which ensures sufficient stability and long-lasting reliability when operating in modern knitting machines. Furthermore, a method for producing a stable and reliable heald shaft is provided.

The object is achieved by a heddle frame with at least two frame rods which run substantially in the longitudinal direction of the heddle frame. The heald frame further comprises at least one side support which extends substantially in the height direction of the heald frame and at which the at least two frame rods are arranged at a distance in the height direction. The sides of the frame rods facing each other in the height direction are referred to as inner sides and the sides of the frame rods facing away from each other are referred to as outer sides. The side support has a flange which extends substantially in the longitudinal direction of the heddle frame. At least one of the frame bars is constructed of a light metal and has a cross-sectional profile that bounds at least two chambers. The heald frame further comprises a securing mechanism for releasably locking said flange at said frame rod. At least one chamber has a height which corresponds to at least 30%, preferably at least 35% and particularly preferably at least 40% of the height of the frame rod. The flanges of the side supports engage into the chamber and fill the chamber in the height direction at least in the region of the longitudinal extension of the heddle frame.

The cross-sectional profile of the frame rod with the cavity (the height of the cavity being at least 30% of the height of the cross-sectional profile) displaces the bridges (which connect the side walls of the profile and bound the cavity in the interior of the profile) and also thereby displace the mass of the bridges far away from each other. The frame rod thereby acquires a high rigidity in proportion to its mass and this reduces deformations and forces during the weaving operation, which stress the frame rod in the region of the corner connections and may ultimately damage it. The high chamber can also accommodate the high flange of the side support. The flange is more stable with increasing height with respect to shear forces and thus with respect to tearing. The flange can thereby be embodied narrow, so that the flange can be guided laterally in the chamber via the side wall. No guide slots or the like are required at the flanges and at the bridges of the chambers. The flange can bear against the full face of the chamber at the bridge. This full-surface type of contact reduces the surface pressure between the bearing surface of the flange and the bridge and thus reduces the probability of contact-to-sink (Setzung) occurring. The depression in the contact between the collar and the bridge causes a release of the pretensioning of the corner connection and thus a destruction of the frame bar and/or of the side supports.

The frame rod of a heald shaft according to the invention is usually formed for the most part by an extruded profile composed of aluminum, or an aluminum alloy. The direction in which the profile sections forming the frame rods extend is the longitudinal direction of the heald frame. The length of the profile section is predetermined by the desired braid width. The extruded profiles usually used for frame rods are usually narrower than 12mm, since this is the usual distance dimension with which the heald frames follow one another in the weaving machine. The direction of the smallest extension of the profile section is the width direction of the heald frame. The final usual extruded profiles in the height direction of the heddle frame have a dimension of between 90mm and 180mm, typically between 120mm and 150 mm. The frame rod of a heald frame according to the invention can, for example, have a height of about 140 mm. The two frame rods of the heald frame are spaced apart in the height direction by side supports. The spacing between the two frame rods is predetermined by the desired heddle length. The heddle is arranged in the intermediate space between two spaced apart frame rods during weaving. Correspondingly, the respective narrow side of the frame bar (the side facing the other frame bar) is referred to as the inner side. The opposite side pointing outwards is referred to as the outer side.

The cross-sectional profile of the extruded profile for a heald frame according to the invention delimits at least two chambers. The chamber forms an elongated hollow space in the frame rod, which hollow space passes completely through the frame rod in the longitudinal direction. The chambers are bounded in the width direction by the side walls and in the height direction by the bridge. In the sense of the present invention, a chamber is mentioned if all limiting side walls and bridges are present at least in part. The meaning of the concept chamber does not include in the present invention, for example, a space which is still only enclosed by the bridge, but in which the side walls have been completely removed. The space enclosed by just one bridge is likewise not a chamber in the sense of the present invention. The height of the cavities is in the context of the present invention the pitch of the bridges by which the cavities are enclosed. The height of the frame rod is the largest spacing in the height direction of two faces, one of which is arranged at the outer side of the frame rod and the other at the inner side of the frame rod. At least one chamber of the frame rod has a height which corresponds to at least 30%, preferably at least 35% and particularly preferably at least 40% of the height of the frame rod.

The side supports usually have an elongated base body which, in the assembled state at the frame bar, extends substantially in the height direction. For the fastening at the frame rod, two flanges are present at the elongated base body, which flanges extend substantially in the longitudinal direction of the heddle frame. In the heald frame according to the invention the flange engages into the cavity of the frame rod in order to connect the side support with the frame rod. According to the invention, the flange fills the chamber in the height direction. The more precisely the height of the flange and the height of the chamber are matched, the less the frame rod is deformed when the corner connection is locked, which advantageously affects the life of the heald frame. The height of the flange is advantageously adjusted in such a way that it can be moved into the cavity of the frame rod without a great expenditure of force. For this purpose, it can also be advantageous if, for example, the height of the chambers is not sufficiently accurate to be able to be achieved by pressing, the dimensions of the chambers are adapted by reworking the bridge. To be more precise thereafter. The flanges of the side supports extend in the longitudinal direction much less than the length of the frame bar. The flange thus fills the cavity of the frame rod only along the outermost end region of the frame rod of the longitudinal extension of said frame rod. In order to fix the side support at the frame rod, the flange of the side support can have a through-opening for the passage of the components of the fixing mechanism. Such components of the securing mechanism can be realized by threaded fasteners. The wall of the flange in the width direction around such an aperture can be rendered very small. But still has sufficient stability due to the relatively large height of the flange. Furthermore, drive elements can be arranged in every conceivable embodiment on the side supports. It is alternatively conceivable to also arrange the drive element at the frame rod. The drive element can be fixed directly at the outer bridge or also at a drive element structural part which is arranged to abut against the outer bridge within the outer chamber. The drive element component can have at least two threads for fastening the drive element and a through opening for a threaded fastener of an element, for example a fastening means. Then correspondingly, the outer bridge can have three through-openings. The height of the flange of the side support reduces the height of the drive element structural part in this case, but fills the outer chamber in the height direction, which outer chamber comprises such a drive element structural part. All other known elements such as guide elements (made of wood), intermediate connections or others can be placed at the frame rod.

The fastening means for releasably locking the flange of the side support at or in the frame bar are preferably designed as a two-part mechanism. Preferably, the fastening mechanism has a female and a male fastening element. The male fixation element can be a threaded fastener. The threaded fastener head is advantageously located at the outside of the frame rod. The female fixation element can have threads. The thread can be introduced in an additional structural part which is arranged in an inner chamber which adjoins the chamber accommodating the flange. Additional structural components can be stopped in the inner chamber to prevent falling out. For example, the threaded component can be riveted or the threaded component can be provided with a deepening into which the material of the side wall is pressed. The fastening means can be designed such that the threaded fastener is guided from the outside through the through-opening in the outer bridge, thereafter through the through-opening in the flange of the side support, continues through the through-opening of the inner bridge and finally into the thread of the structural component. The threaded structural component can be arranged in the inner chamber and fixed in the inner chamber in any desired manner. The openings and threads are aligned in this case. In this example, the bridge of the chamber is pressed against the collar of the side support by tightening the threaded fastener and thereby locks the collar in the chamber. In this case the threaded fastener is under tensile stress if the side support and the frame bar are locked.

A particularly advantageous embodiment is obtained if the chamber in which the side support is locked abuts the outer side of the frame bar. The chamber adjacent the outside is called the outer chamber. The outer chamber has a height which corresponds to at least 30%, preferably at least 35% and particularly preferably at least 40% of the height of the frame rod. The flanges of the side supports engage into the outer chamber and fill the outer chamber in the height direction of the heddle frame at least in the region of the longitudinal extension of the heddle frame.

The bridge which is releasably locked to the collar by the fastening means advantageously has a certain stability. For this purpose, it is particularly advantageous if the inner bridge, which separates the outer chamber from the inner chamber, wherein the inner chamber adjoins the outer chamber in the direction towards the inside, has an extension in the height direction which is at least 2% of the height of the frame rod. A small deformation of the bridge occurs during the weaving operation due to the stability of the bridge. This causes a small relative movement between the bridge and the flange resting thereon. Thereby reducing the tendency of the corner connection to settle. It is also advantageous if the outer bridge delimiting the outer chamber with respect to the outside of the frame rod has an extension in the height direction of at least 5% of the height of the frame rod. The stability of the outer bridge can bring two additional advantages with it: on the one hand, the stable outer bridge contributes to the stability of the frame rod as a whole and the deformation of the frame rod in the corner connections is reduced. On the other hand, if, for example, the fastening means or the elements therein are supported directly on the outer bridge, the latter can distribute the forces better. The threaded fastener head of the threaded fastener which pretensions the corner connection under tension can advantageously be placed directly on the outer bridge without additional means for load sharing. An annular intermediate position between the head of the threaded fastener and the external bridge or the like is advantageous but not necessary. An outer bridge with an extension in the height direction of at least 2% of the height of the frame rod can likewise be used advantageously.

An outer bridge which extends in the longitudinal direction of the heddle frame up to the greatest extension of the frame rods is particularly advantageous. As mentioned above, the outer bridge according to the invention enables particularly good introduction of forces into the frame rod. The corner connection, which takes full advantage of the positive properties of the outer bridge, can thus be produced cost-effectively. Extensive reworking of the frame bars and the introduction of additional components for absorbing forces are not necessary. The fixing means can thus be guided close to the end of the frame rod, the length of the frame rod available for the weaving run not being reduced.

The side support, in which the flange is made of aluminum or an aluminum alloy in one piece with the side support, is particularly stable and can be manufactured efficiently. The support made of aluminum can be machined particularly quickly from the blank and the flange then has the required precision in its height dimension. Also, the through-going opening can be simply manufactured in the flange. The height determined by the extent of the flange makes the flange sufficiently stable without material transitions. The machined surface of the flange can also have a high surface quality, which in turn reduces the tendency to settle.

Furthermore, it is advantageous if the flange of the side support fills the outer chamber in the width direction of the heddle frame at least in the region of the longitudinal extension of the heddle frame. The flange is guided precisely in the chamber by the exact coordination of the width of the flange and the width of the chamber. The wide collar on the other hand provides a large contact surface on the bridge. This is again very advantageous in order to reduce the tendency of the corner connection to sink. The width of the flange is advantageously selected such that it can be moved into the chamber with as little play as possible, but still with little force expenditure.

The flange of the side support can have an edge which is reworked, in particular interrupted. This can help the flange of the side support at the edge running in the height direction to be introduced into the chamber more easily. The edges in the longitudinal direction are advantageously interrupted at the flange above and/or below in order to ensure a good surface-type support on the bridge. For this purpose, there can be a deepening in the transition from the bridge to the side wall in order to prevent the collar from resting on the fillet at the transition from the bridge to the side wall. Such a bilateral deepening can be provided at both bridges or at only one bridge. The broken edge can in the context of the present invention be arranged at an angle or as a rounding. Limitations on certain methods for machining edges or on certain embodiments (chamfering, rounding) should not be linked by the concept of "interrupted" edges.

The heald shaft according to the invention can have a frame rod in which the ratio of the height of the outer chamber to the length of the pressure relief slot arranged in the side wall of the outer chamber is less than 1: 2.5. due to the tensioning of the bridge of the chamber relative to the collar of the side support, stresses and deformations occur in the side wall of the chamber, in particular as a result of tolerance. In order to reduce the effect of the stresses and deformations, pressure relief slits are provided in the chamber. The above-mentioned proportions describe a particularly advantageous embodiment of the debossment seam. The high chamber in combination with the high flange allows the debulking opening to be implemented relatively short. For example, the ratio can be about 1: 1.9. it is also advantageous if the ratio of the height of the pressure relief slit to the height of the outer chamber is less than 1: 4. for example, the ratio can be about 1: 3. the pressure relief slot can have an exit opening in which a plurality of radii merge into one another in order to distribute the occurring stresses as well as possible.

The method according to the invention for producing a heald shaft has the following method features. At least one side support, which extends essentially in the height direction of the heddle frame and is equipped with a flange extending essentially in the longitudinal direction of the heddle frame, is arranged at least one frame rod consisting of a light metal, which extends essentially in the longitudinal direction of the heddle frame and which has a cross-sectional profile which forms at least two chambers in such a way that: placing the flange in engagement with the chamber. The flange is releasably locked in the chamber by means of at least one securing means. According to the invention, the method is characterized in that the flange of the side support fills the chamber in the height direction at least in the area of the longitudinal extension of the heddle frame and thereby the flange is locked in one of the at least two chambers, wherein the chamber has a height which corresponds to at least 30%, preferably at least 35% and particularly preferably at least 40% of the height of the frame rod. In this way, a frame rod is obtained which has a high stability and which can be produced cost-effectively and simply.

At least one face of the bridge can be reworked in the chamber at least in the region of the longitudinal extension of the heald frame when the heald frame is manufactured. As already mentioned above, it is advantageous for the stability of the corner connection that the height of the chamber is dimensioned as precisely as possible in accordance with the height of the flange. To improve the precision, the chamber can be reworked in the interior at the bridge. The large height of the chamber has the effect that the reworking can be carried out relatively simply. The minimum length of the reworked area is determined by the extension of the flange in the longitudinal direction.

The pressure relief slot can be introduced into the side wall of the outer chamber by blanking during the production of the heald frame. On the one hand, punching is a cost-effective production method, for example compared to a milling process or the like. The blanking can be performed simply due to the height of the chamber and the geometry of the pressure relief slit.

Drawings

Figure 1 shows a heddle frame in a general view.

Figure 2 shows a section through a frame rod.

Fig. 3 shows an overall view of the side support.

Fig. 4 shows an end section of the frame rod.

Fig. 5 shows an end section of the frame rod with the side support moved in.

List of reference numerals

1 heald frame

2 frame rod

3 side support

4 Flange

5 Chamber

6 fixing mechanism

7 outer chamber

8 inner bridge

9 inner chamber

10 extension of the inner bridge in the height direction

11 outer bridge

12 extension of the outer bridge in the height direction

13 pressure relief seam

14 side wall of chamber

15 area of chamber

16 threaded fastener of fixing mechanism

17 structural component of fixing mechanism

18 deepening in the transition between the bridge and the side wall

19 drive element

L longitudinal direction

H height direction

B width direction

Distance between the A frame rods

IS inner side

Outside of AS

height of hk chamber

hs frame rod height

le pressure relief seam length

he is the pressure relief seam height.

Detailed Description

Figure 1 shows an embodiment of a heddle frame 1 according to the invention in a general view. Some of the details shown, such as dust windows, rivets of the heald carrier rail and other elements known to the person skilled in the art, can be exchanged at will and are therefore not described separately. Other details such as guide elements (made of wood) are not shown. All details not described or shown are not important for the invention and can be omitted or added by a person skilled in the art depending on the application. The exemplary heald frame 1 is constructed from two frame rods 2 and two side supports 3. For orientation, the longitudinal direction L and the height direction H are drawn. The outside AS and the inside IS of the frame rod 2 are also named. The spacing a of the frame rods 2 can be seen in the space occupied by the heddles during the weaving operation. The side support 3 is in the embodiment described locked in the frame bar by means of threaded fasteners 16.

Fig. 2 shows in particular the cross-sectional profile of the frame rod 2 in a section through the frame rod 2 from fig. 1. For orientation, the height direction H and width direction B are shown. The cross-sectional profile generally comprises three

chambers

7, 9, 5. The outer chamber 7 is delimited from the outer side AS of the profile by an outer bridge 11. The inner bridge 8 separates the outer chamber 7 from the inner chamber 9. Furthermore, a third chamber 5 follows in the direction of the inner side. The chamber side is bounded upwardly by side walls 14. In the inner chamber 9, a structural component 17 of the fastening mechanism 6 is arranged. The threads in the structural part 17 of the fixing means 6 are indicated by means of double dashed lines. The through-openings in the outer bridge 11 and in the inner bridge 8 are shown by single dashed lines. The threaded fastener 16 originating from the fixing means 6 of fig. 1 is omitted for reasons of clarity. A deepening 18 is shown in the transition between the outer bridge 11 and the side wall 14.

Fig. 3 shows a single side support 3 from fig. 1 in a general view. The corresponding through-going openings are shown with dashed lines in the flange 4. The edge of the flange 4 is exemplarily shown partially broken. Also shown by way of example is a drive element 19, which is arranged on the side support 3.

Fig. 4 shows an end section of the frame rod 2 from fig. 1. The height direction H and the longitudinal direction L are again given. In this illustration, for example, the invisible or covered line is shown in dashed lines from the inside of the frame rod 2. This also makes it possible to see the component 17 of the fastening device 6, which is arranged in the inner chamber 9. The length le and height he of the pressure relief slit 13 are shown by the arrowed lines. The height hs of the frame rod 2, the height hk of the outer chamber 7, the extension 12 of the outer bridge 11 in the height direction H and the extension 10 of the inner bridge 8 in the height direction H are likewise given by arrowed lines. The area 15 of the chamber, in which the bridge is reworked, is shown with curly brackets.

Fig. 5 shows the illustration as in fig. 4 with the flange 4 of the side support 3 inserted into the outer chamber 7 of the frame rod 2. It can be seen particularly well here how the flange 4 of the side support 3 fills the outer chamber 7 of the frame rod 2 in the height direction H. It can also be seen well how the through-going openings in the outer bridge 11, in the collar 4 and in the inner bridge 8 are aligned with the thread of the component 17 of the fastening device 6. The threaded fastener 16 is omitted again for reasons of clarity.

Claims

1. Heddle frame (1) with the following features:

at least two frame rods (2) extending substantially in the longitudinal direction (L) of the heald frame (1),

at least one side support (3) which extends essentially in the height direction (H) of the heald frame (1) and at which the at least two frame rods (2) are arranged at a distance (A) in the height direction (H), wherein the sides of the frame rods facing each other in the height direction (H) are referred to AS Inner Sides (IS) and the sides facing away from each other are referred to AS outer sides (AS),

wherein the at least one side support (3) is equipped with a flange (4) which extends substantially in the longitudinal direction (L) of the heddle frame (1),

wherein at least one frame rod (2) consists of a light metal and has a cross-sectional profile which delimits at least two chambers (5, 7, 9),

at least one fastening means (6) for releasably locking the flange (4) to the frame bar (2),

it is characterized in that the preparation method is characterized in that,

at least one chamber (5) has a height (hk) which corresponds to at least 30% of the height (hs) of the frame rod (2),

and the fixing means (6) being associated with the chamber (5),

and the flanges (4) of the side supports (3) engage into the chambers (5) and fill them at least in the area of the longitudinal extension of the heddle frame (1) in the height direction (H) of the heddle frame (1),

and the fixing means (6) co-act with the flange (4) in the chamber (5) for fixing the side support (3) at the frame bar (2).

2. Heddle frame (1) according to claim 1,

it is characterized in that the preparation method is characterized in that,

the chamber adjoining the outer side (AS) of the frame rod (2) is an outer chamber, the outer chamber (7) having a height (hk) which corresponds to at least 30% of the height (hs) of the frame rod, and the flanges (4) of the side supports (3) engaging into the outer chamber (7) and filling it at least in the area of the longitudinal extension of the heald frame (1) in the height direction (H) of the heald frame (1).

3. Heddle frame (1) according to claim 2,

it is characterized in that the preparation method is characterized in that,

the chamber adjoining the outer chamber (7) in the direction towards the Inside (IS) IS an inner chamber (9),

the inner bridge (8) has an extension (10) in the height direction (H) of at least 2% of the height (hs) of the frame rod (2), the inner bridge (8) separating the outer chamber (7) from the inner chamber (9).

4. Heddle frame (1) according to claim 2,

it is characterized in that the preparation method is characterized in that,

an outer bridge (11) delimiting the outer chamber (7) from the outside (AS) of the frame rod (2) has an extension (12) in the height direction (H) of at least 5% of the height (hs) of the frame rod (2).

5. Heddle frame (1) according to claim 4,

it is characterized in that the preparation method is characterized in that,

the outer bridge (11) extends in the longitudinal direction (L) of the heald frame (1) up to the maximum extension of the frame rod (2).

6. Heald frame (1) according to claim 1 or 2

It is characterized in that the preparation method is characterized in that,

the flange (4) of the side support (3) is formed in one piece with the side support (3) from aluminum.

7. Heddle frame (1) according to claim 2,

it is characterized in that the preparation method is characterized in that,

the flange (4) of the side support (3) fills the outer chamber (7) at least in the region of the longitudinal extension of the heald frame (1) in the width direction (B) of the heald frame (1), which is perpendicular to the height direction (H) and the longitudinal direction (L) of the heald frame (1).

8. Heddle frame (1) according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

reworking the edge of the flange (4) of the side support (3).

9. Heddle frame (1) according to claim 2,

it is characterized in that the preparation method is characterized in that,

the ratio of the height (hk) of the outer chamber (7) to the length of a pressure relief slit (13) arranged in a side wall (14) of the outer chamber (7) is less than 1: 2.5.

10. heddle frame (1) according to claim 9,

it is characterized in that the preparation method is characterized in that,

the ratio of the height (he) of the pressure relief slot (13) to the height (hk) of the outer chamber (7) is less than 1: 4.

11. heddle frame (1) according to claim 1,

it is characterized in that the preparation method is characterized in that,

the at least one chamber (5) has a height (hk) which corresponds to at least 35% of the height (hs) of the frame rod (2).

12. Heddle frame (1) according to claim 1,

it is characterized in that the preparation method is characterized in that,

the at least one chamber (5) has a height (hk) which corresponds to at least 40% of the height (hs) of the frame rod (2).

13. Heddle frame (1) according to claim 2,

it is characterized in that the preparation method is characterized in that,

the outer chamber (7) has a height (hk) corresponding to at least 35% of the height (hs) of the frame rod.

14. Heddle frame (1) according to claim 2,

it is characterized in that the preparation method is characterized in that,

the outer chamber (7) has a height (hk) corresponding to at least 40% of the height (hs) of the frame rod.

15. Heddle frame (1) according to claim 8,

it is characterized in that the preparation method is characterized in that,

interrupting the edge of the flange (4) of the side support (3).

16. Method for producing a heald shaft (1), with the following method features:

at least one side support (3) which extends substantially in the height direction (H) of the heald frame (1) and is equipped with a flange (4) which extends substantially in the longitudinal direction (L) of the heald frame (1) is arranged at least one frame rod (2) made of light metal which extends substantially in the longitudinal direction (L) of the heald frame (1) and which has a cross-sectional profile which forms at least two chambers (5, 7, 9) in such a way that: placing the flange (4) in engagement with the chamber (5, 7, 9),

releasably locking the flange (4) in the chamber (5, 7, 9) by at least one fixing means (6),

it is characterized in that the preparation method is characterized in that,

the flange (4) of the side support (3) is filled with the chambers (5, 7, 9) in the height direction (H) at least in the area of the longitudinal extension of the heald frame (1),

and the flange (4) is locked in one of the at least two chambers (5, 7, 9), one of the at least two chambers (5, 7, 9) having a height (hk) corresponding to at least 30% of the height (hs) of the frame rod (2),

17. Method for manufacturing a heald frame (1) according to claim 16,

it is characterized in that the preparation method is characterized in that,

reworking at least one face of an inner bridge (8) and an outer bridge (11) in the chambers (5, 7, 9) at least in the region (15) of the longitudinal extension of the heald frame (1),

the chamber adjacent to the outside (AS) of the frame rod (2) IS an outer chamber (7), the chamber adjacent to the outer chamber (7) in the direction towards the Inside (IS) IS an inner chamber (9), the inner bridge (8) separates the outer chamber (7) from the inner chamber (9), and the outer bridge (11) delimits the outer chamber (7) with respect to the outside (AS) of the frame rod (2).

18. Method for manufacturing a heald frame (1) according to claim 16 or 17,

it is characterized in that the preparation method is characterized in that,

the pressure relief slot (13) is introduced into a side wall (14) of the outer chamber (7) by blanking.

19. Method for manufacturing a heald frame (1) according to claim 16,

it is characterized in that the preparation method is characterized in that,

one of the at least two chambers (5, 7, 9) has a height (hk) which corresponds to at least 35% of the height (hs) of the frame rod (2).

20. Method for manufacturing a heald frame (1) according to claim 16,

it is characterized in that the preparation method is characterized in that,

one of the at least two chambers (5, 7, 9) has a height (hk) which corresponds to at least 40% of the height (hs) of the frame rod (2).