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Title:
CORNER CONNECTING DEVICE FOR A HEALD FRAME
Document Type and Number:
WIPO Patent Application WO/2016/037747
Kind Code:
A1
Abstract:
Corner connecting device for connecting a side element (7, 8) and a transverse element (2, 3) of a heald frame (1), wherein the side element (7, 8) is provided with a tongue element (22), and a pressure element (11) contacting a receiving element (10), wherein a contact surface in which a pressure element (11) contacts a receiving element (10) is arranged for decomposing the connecting force (F) into a first component perpendicular to the assembly direction (X) urging a first leg (12) and a second leg (13) towards each other and a second component urging the receiving element (10) in the assembly direction (X) deeper into a cavity (23). Weaving machine, heald frame and method for producing a heald frame.

Inventors:
ROELSTRAETE, Kristof (Deerlijkstraat 141, Zwevegem, B-8550, BE)
DESEYNE, Joost (Populierstraat 4, Gits, B-8830, BE)
DEBERGH, Patrick (Roggestraat 2A, Westvleteren, B-8640, BE)
Application Number:
EP2015/066683
Publication Date:
March 17, 2016
Filing Date:
July 21, 2015
Export Citation:
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Assignee:
PICANOL (Steverlyncklaan 15, Ieper, B-8900, BE)
International Classes:
D03C9/06
Foreign References:
JPH02132681U1990-11-05
US5005607A1991-04-09
EP1526198A22005-04-27
BE901502A1985-05-02
Attorney, Agent or Firm:
PATENTANWÄLTE RUFF, WILHELM, BEIER, DAUSTER & PARTNER MBB (Kronenstrasse 30, Stuttgart, 70174, DE)
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Claims:
Claims

1 . Corner connecting device for connecting a side element (7, 8) and a transverse element (2, 3) of a heald frame (1 ), wherein the side element (7, 8) is provided with a tongue element (22), the corner connecting device (9) comprising a receiving element (10) with a first leg (12) and a second leg (13) arranged for receiving the tongue element (22) in an assembly direction (X) and adapted for being housed in a cavity (23) of the transverse element (2, 3), and a pressure element (1 1 ) contacting the receiving element (10), wherein a connecting force (F) applied to the pressure element (1 1 ) perpendicular to the assembly direction (X) urges the first leg (12) and the second leg (13) towards each other for clamping the tongue element (22), characterized in that a contact surface in which the pressure element (1 1 ) contacts the receiving element (10) is arranged for decomposing the connecting force (F) into a first component perpendicular to the assembly direction (X) urging the first leg (12) and the second leg (13) towards each other and a second component urging the receiving element (10) in the assembly direction (X) deeper into the cavity (23).

2. Corner connecting device according to claim 1 , characterized in that at least one first inclined contact surface (16, 31 , 32) is provided at the receiving element (10), in which the pressure element (1 1 ) contacts the receiving element (10), preferably the pressure element (1 1 ) is provided with at least one second inclined contact surface (17, 28, 29) contacting the at least one first inclined contact surface (16, 31 , 32), wherein a slope of the at least one first inclined contact surface (16, 31 , 32) is at least essentially equal to a slope of the at least one second inclined contact surface (17, 28, 29).

3. Corner connecting device according to claim 2, characterized in that the pressure element (1 1 ) is wedge-shaped.

4. Corner connecting device according to claim 2, characterized in that the pressure element (1 1 ) has a sawtooth profile (27) forming two or more second inclined contact surfaces (28, 29).

5. Corner connecting device according to any one of claims 1 to 4, characterized in that the receiving element (10), in particular the first leg (12) of the receiving element (10), is provided with a mounting space (14) for detachably mounting the pressure element (1 1 ) to the receiving element (10).

6. Corner connecting device according to claim 5, characterized in that the pressure element (1 1 ) is mounted with play in the assembly direction (X) in the mounting space (14).

7. Corner connecting device according to any one of claims 1 to 6, characterized in that the pressure element (1 1 ) has a centering part (18) arranged for receiving a bolt (25).

8. Corner connecting device according to any one of claims 1 to 7, characterized in that the receiving element (10) has elastic properties, in particular is made of synthetic material from the group comprising polyoxymethylene.

9. Corner connecting device according to any one of claims 1 to 8, characterized in that the pressure element (1 1 ) is made of metal material.

10. Corner connecting device according to any one of claims 1 to 9, characterized in that at least one of the first leg (12) and the second leg (13) is provided with a non-linear clamping surface adapted to a non-linear side surface of the tongue element (22).

1 1 . Corner connecting device according to claim 10, characterized in that at least one of the first leg (12) and the second leg (13) is provided with an undulated clamping surface (20, 21 ) adapted to an undulated side surface (33, 34) of the tongue element (22).

12. Heald frame with a transverse element (2, 3), a side element (7, 8) connected to the transverse element (2, 3), and a corner connecting device (9) according to any one of claims 1 to 1 1 for connecting the side element (7, 8) and the transverse element (2, 3), wherein the side element (7, 8) is provided with a tongue element (22) projecting towards the transverse element (2, 3), wherein the transverse element (2, 3) is provided with a first cavity (23), wherein the corner connecting device (9) comprises a receiving element (10) with a first leg (12) and a second leg (13) receiving the tongue element (22) in an assembly direction (X), which receiving element (10) is housed in the first cavity (23) of the transverse element (2, 3), and a pressure element (1 1 ) contacting the receiving element (10), wherein a connecting force applied to the pressure element (1 1 ) perpendicular to the assembly direction (X) urges the first leg (12) and the second leg (13) towards each other for clamping the tongue element (22), and wherein a contact surface in which the pressure element (1 1 ) contacts the receiving element (10) is arranged for decomposing the connecting force into a first component perpendicular to the assembly direction (X) urging the first leg (12) and the second leg (13) towards each other and a second component urging the receiving element (10) in the assembly direction (X) deeper into the first cavity (23).

13. Heald frame according to claim 12, characterized in that the transverse element (2, 3) has a second cavity (24) into which a support element (26) is inserted, wherein a bolt (25) for applying a connecting force to the pressure element (1 1 ) is screwed into the support element (26).

14. Heald frame according to claim 12 or 13, characterized in that the receiving element (10) has at least one, preferably two abutment surfaces (19) perpendicular to the assembly direction (X) contacting an end surface of the transverse element (2, 3) for limiting a movement of the receiving element (10) with respect to the transverse element (2, 3) in the assembly direction (X).

15. Weaving machine, characterized in that the weaving machine is provided with at least one heald frame (1 ) according to any one of claims 12 to 14.

16. Method for producing a heald frame (1 ) with a transverse element (2, 3), which transverse element (2, 3) is a profile element having a cavity (23), and with a side element (7, 8) provided with a tongue element (22) projecting towards the transverse element (2, 3) and to be connected to the transverse element (2, 3) by means of a corner connecting device (9) according to any one of claims 1 to 1 1 , the corner connecting device (9) comprising a receiving element (10) having a first leg (12) and a second leg (13) for receiving the tongue element (22) of the side element (7, 8) in an assembly direction (X), which receiving element (10) is housed in the cavity (23) of the transverse element (2, 3), and a pressure element (1 1 ) contacting the receiving element (10), the method comprising applying a connecting force (F) to the pressure element (1 1 ) perpendicular to the assembly direction (X), which connecting force (F) is decomposed into a first component perpendicular to the assembly direction (X) for urging the first leg (12) and the second leg (13) towards each other and a second component in the assembly direction (X) for urging the receiving element (10) with the tongue element (22) deeper into the cavity (23) of the transverse element (2, 3).

Description:
Corner Connecting Device for a Heald Frame

[0001 ] The invention relates to a corner connecting device for connecting a side element and a transverse element of a heald frame, to a heald frame with a corner connecting device, to a weaving machine with such a heald frame and to a method for producing such a heald frame. [0002] It is known to provide a heald frame with a top transverse element and a bottom transverse element which are connected to side elements in order to form a heald frame. In the following description and claims the top transverse element and the bottom transverse element are referred to as transverse elements. The side elements are connected to the transverse elements using corner connecting devices. [0003] JP 06-23585 Y relates to a heald frame with a side element provided with a protruding part and a transverse element with a hollow section into which hollow section an elastic holder having a recess formed between a first leg and a second leg is inserted. For connecting the side element with the transverse element, a protruding part is clamped between the first leg and the second leg, wherein a clamping force perpendicular to an assembly direction is applied to the elastic holder by means of a pressure element.

[0004] It is an object of the invention to provide an improved corner connecting device allowing a reliable and repeatable dismountable connection of a side element and a transverse element. It is further an object of the invention to provide a heald frame, a weaving machine with such a heald frame and a method for producing such a heald frame. [0005] This object is solved by a corner connecting device according to claim 1 , a heald frame according to claim 12, a weaving machine according to claim 15 and a method according to claim 16.

[0006] According to a first aspect, a corner connecting device is provided for connecting a side element and a transverse element of a heald frame, wherein the side element is provided with a tongue element, the corner connecting device comprises a receiving element with a first leg and a second leg arranged for receiving the tongue element in an assembly direction and adapted for being housed in a cavity of the transverse element, and a pressure element contacting the receiving element, wherein a connecting force applied to the pressure element perpendicular to the assembly direction urges the first leg and the second leg towards each other for clamping the tongue element, and wherein a contact surface in which the pressure element contacts the receiving element is arranged for decomposing a the connecting force into a first component perpendicular to the assembly direction urging the first leg and the second leg towards each other and a second component urging the receiving element in the assembly direction deeper into the cavity. [0007] In typical applications, the receiving element is inserted into a cavity of a hollow section of a transverse element, wherein the receiving element is housed or accommodated moveable in the assembly direction in the cavity. A side element carrying the tongue element and the receiving element is attached to the transverse element. According to the application, the connecting force applied to the pressure element is used to clamp the tongue element between the first leg and the second leg of the receiving element and in addition to move the receiving element in assembly direction deeper into the cavity of the transverse element. The movement of the receiving element in the assembly direction with respect to the transverse element while the receiving element is clamping the tongue element urges the side element, which is carrying the tongue element, towards the transverse element. This allows for a repeatable reliable connection. Preferably the receiving element is provided with at least one abutment surface perpendicular to the assembly direction for limiting a movement of the receiving element into the cavity with respect to the transverse element.

[0008] The pressure element is adapted to receive an external connecting force in a direction perpendicular to the assembly direction. The contact surfaces at the receiving element and/or at the pressure element are designed to partly redirect the connecting force applied perpendicular to the assembly direction into the assembly direction. This partial redirection of the connecting force applied is, in the context of the application, referred to as decomposition of the connecting force.

[0009] According to a preferred embodiment, at least one first inclined contact surface is provided at the receiving element, in which the pressure element contacts the receiving element. This allows a decomposition of the force applied by the pressure element with a sufficient ratio. The first inclined contact surface encloses with a direction perpendicular to the assembly direction a slope angle between 1 ° and 89° in clockwise direction, preferably a slope angle between 30° and 70° is chosen. The smaller the slope angle, the larger is the second component of the force urging the receiving element in the assembly direction deeper into the cavity. Preferably, the pressure element is provided with at least one second inclined contact surface contacting the at least one first inclined contact surface, wherein the slope of the at least one first inclined contact surface is at least essentially equal to a slope of the at least one second inclined contact surface. This allows for a reliable force transmission over a large area. [0010] According to one embodiment, the pressure element is wedge-shaped for forming a second inclined contact surface. Such an element has a simple construction and, hence, is inexpensive to manufacture.

[001 1 ] In other preferred embodiments, the pressure element has a sawtooth profile forming two or more second inclined contact surfaces. The sawtooth profile allows to provide two or more inclined contact surfaces without significantly decreasing the overall height and, hence, the rigidity of the pressure element. In one embodiment, the pressure element has a regular sawtooth profile, wherein the slope of all second inclined contact surfaces is at least essentially equal. In other embodiments, the sawtooth profile is irregular, wherein the height of adjacent teeth and/or the slope of adjacent teeth of the sawtooth profile differ. The tips of the sawtooth profile in preferred embodiments are rounded in order to avoid sharp edges.

[0012] In one embodiment, the receiving element, in particular the first leg of the receiving element, is provided with a mounting space for detachably mounting the pressure element to the receiving element. A connecting force is applied to the pressure element and the pressure element is subjected to wear. By detachably mounting the pressure element to the receiving element, the pressure element can be replaced easily.

[0013] In preferred embodiments, the pressure element is mounted with play in the assembly direction in the mounting space. This allows positioning the pressure element in a defined position in the assembly direction with respect to the cavity of the transverse element of a heald frame into which the receiving element is slidingly inserted. By applying a force to the pressure element perpendicular to the assembly direction, the pressure element is moved perpendicular to the assembly direction, while being held fixed in position in the assembly direction. Due to the movement, a force is exerted on the receiving element. As the receiving element is moveable with respect to the pressure element, the receiving element is moved in assembly direction with respect to the pressure element and, in case the pressure element is being held fixed in position with respect to the transverse element, moved in assembly direction with respect to the cavity.

[0014] For applying a force to the pressure element, in preferred embodiments a bolt is provided, which bolt contacts the pressure element. In preferred embodiments, the pressure element has a centering part arranged for receiving the bolt. [0015] In preferred embodiments, the receiving element has elastic properties, in particular is made from a synthetic material from the group comprising polyoxymethylene, also known as polyacetal. The elastic properties allow to use restoring forces for clamping the tongue element. In addition, such materials in many cases are advantageous with regard to frictional properties. Further, due to the elastic properties, the corner connecting device has some flexibility, which is advantageous for connecting elements used in high speed applications, such as heald frames used in weaving machines. In case the receiving element is made from non-elastic material, the legs of the receiving element in one embodiment are mounted by means of hinge joints to a main body.

[0016] The pressure element in one embodiment is also made from a synthetic material. Preferably, the pressure element is made from a metal material, in particular casted as a zinc alloy comprising aluminum, magnesium and/or copper. Such a pressure element is resistant to wear and can withstand large forces.

[0017] In order to ensure that the tongue element is securely held between the legs of the receiving element in one embodiment, a material combination of the clamping surfaces contacting each other having a high coefficient of friction is chosen. In alternative or in addition, a positive form locking is provided. To this end, the tongue element may be provided with a non- linear surface. In one embodiment of the corner connecting device, at least one of the first leg and the second leg is provided with a non-linear clamping surface adapted to the non-linear side surface of the tongue element. For example, the tongue element is provided with a convexly curved clamping surface facing the first leg and the second leg. In other examples, the tongue element is provided with concavely curved clamping surfaces facing the first leg and the second leg. Preferably, at least one of the first leg and the second leg is provided with an undulated clamping surface adapted to an undulated side surface of the tongue element.

[0018] According to a second aspect, a heald frame with a transverse element, a side element connected to the transverse element, and a corner connecting device for connecting the side element and the transverse element is provided, wherein the side element is provided with a tongue element projecting towards the transverse element, wherein the transverse element is provided with a first cavity, wherein the corner connecting device comprises a receiving element having a first leg and a second leg receiving the tongue element in an assembly direction, which receiving element is housed in the first cavity of the transverse element, and a pressure element contacting the receiving element, wherein a connecting force applied to the pressure element perpendicular to the assembly direction urges the first leg and the second leg towards each other for clamping the tongue element, and wherein a contact surface in which the pressure element contacts the receiving element is arranged for decomposing the connecting force into a first component perpendicular to the assembly direction urging the first leg and the second leg towards each other and a second component urging the receiving element in the assembly direction deeper into the cavity. Preferably, the heald frame comprises two transverse elements and two side elements, wherein the connection in all four corners comprises a corner connecting device according to the invention.

[0019] The transverse element in one embodiment is a profile element having a hollow section with the first cavity in which the receiving element of the corner connecting device is housed moveably in the assembly direction. As explained above, according to the application, the force applied by the pressure element to the receiving element is used to clamp the tongue element between the first leg and the second leg as well as to move the receiving element in assembly direction with respect to the transverse element. The movement of the receiving element in assembly direction urges the side element carrying the tongue element towards the transverse element. This allows for a repeatable reliable connection. In particular, a misalignment of a corner connection is avoided.

[0020] In one embodiment, the transverse element has a second cavity into which a support element is inserted, wherein a bolt for applying a connecting force to the pressure element is screwed into the support element. The force applied to the pressure element is adjusted by screwing the bolt in and out and moving the pressure element perpendicular to the assembly direction with respect to the support element. In preferred embodiments, the support element and the pressure element are arranged fixed in position with respect to the transverse element, wherein the receiving element is moved in the assembly direction with respect to the pressure element.

[0021 ] According to a further embodiment, the receiving element has at least one, preferably two abutment surfaces perpendicular to the assembly direction contacting an end surface of the transverse element for limiting a movement of the receiving element with respect to the transverse element in the assembly direction. [0022] According to a third aspect, a weaving machine with at least one such heald frame is provided.

[0023] According to a forth aspect, a method is provided for producing a heald frame with a transverse element, which transverse element is a profile element with a cavity, and a side element provided with a tongue element projecting towards the transverse element and to be connected to the transverse element by means of a corner connecting device, the corner connecting device comprising a receiving element having a first leg and a second leg receiving the tongue element in an assembly direction, which receiving element is housed in the cavity of the transverse element, and a pressure element contacting the receiving element, the method comprising applying a connecting force to the pressure element perpendicular to the assembly direction, which connecting force is decomposed into a first component perpendicular to the assembly direction for urging the first leg and the second leg towards each other and a second component in the assembly direction for urging the receiving element with the tongue element deeper into the cavity of the transverse element.

[0024] In one embodiment, the tongue element and the receiving element are combined prior to inserting the receiving element into the cavity. In other embodiments, the tongue element is inserted into the receiving element after the receiving element has been inserted into the cavity. [0025] Embodiments of the invention will be described hereinafter in detail with reference to the schematic drawings. Throughout the drawings, the same elements are indicated by the same reference numbers. In the drawings: figure 1 is a view of a heald frame;

figure 2 is a view of a corner connecting device;

figure 3 is a perspective view of a corner connecting device;

figure 4 is a view of a corner connecting device upon mounting a pressure element; figure 5 is a perspective view of the corner connecting device of Fig. 4 upon mounting the pressure element;

figure 6 is a view of a side element of a heald frame of Fig. 5 after combining a corner connecting device to the tongue element of the side element;

figure 7 is a view of the heald frame with the side element of Fig. 6 after the assembly of the corner connecting device in the transverse element;

figure 8 is an alternative of Fig. 7;

figure 9 is a perspective view of Fig. 8;

figure 10 is an alternative of Fig. 6 prior to combining a corner connecting device to the tongue element of the side element;

figure 1 1 is a view of a corner connecting device prior to mounting of a pressure element;

figure 12 is a view of a corner connecting device upon mounting of a pressure element; figure 13 is a perspective view of a corner connecting device of Fig. 12 prior to mounting the pressure element;

figure 14 is a perspective view of the corner connecting device of Fig. 13 after mounting the pressure element. [0026] Figure 1 shows schematically a view of a heald frame 1 which comprises two transverse elements 2, 3, namely a first transverse element 2 and a second transverse element 3. A heald carrier profile 4 is attached to the first transverse element 2 and a heald carrier profile 5 is attached to the second transverse element 3. Healds 6 are arranged between the heald carrier profiles 4 and 5. At a first side, the transverse elements 2 and 3 are connected to a first side element 7 and at a second side the transverse elements 2 and 3 are connected to a second side element 8. As shown, the first transverse element 2 is the top transverse element, the second transverse element 3 is the bottom transverse element, the first side element 7 is the left side element and the second side element 8 is the right side element. The side elements 7 and 8 are each provided with two tongue elements 22 (shown schematically in Fig. 1 ), which are each received by a corner connecting device 9 (also shown schematically in Fig. 1 ).

[0027] Figs. 2 to 5 schematically show a first embodiment of a corner connecting device 9 according to the invention. The corner connecting device 9 comprises a receiving element 10 and a pressure element 1 1 . In the embodiment shown, the receiving element 10 is a synthetic piece having elastic properties. The pressure element 1 1 is preferably made of a stiff and wear- resistant material, such as metal material.

[0028] As shown in Figs. 6 and 7, the receiving element 10 is U-shaped and comprises a first leg 12 and a second leg 13 for receiving a tongue element 22 in an assembly direction X. A connecting force is applied to the pressure element 1 1 in a second direction Y, perpendicular to the assembly direction X for forcing the first leg 12 towards the second leg 13 and for clamping the tongue element 22. As the receiving element 10 is made of a synthetic material, in particular made of polyoxymethylene, the receiving element 10 does not or only marginally wear the tongue element 22 upon clamping the tongue element 22.

[0029] In an embodiment shown, the first leg 12 of the receiving element 10 is provided with a mounting space 14 for detachably mounting the pressure element 1 1 to the receiving element 10. As schematically shown in Figs. 4 and 5, the pressure element 1 1 is mounted in the mounting space 14 and held in the mounting space 14 by means of two side lips 15. The size and the shape of the mounting space 14 and the pressure element 1 1 are chosen so that the pressure element 1 1 is mounted with play in the mounting space 14. Hence, the pressure element 1 1 is moveable within limits in the mounting space 14, while being held by means of the side lips 15.

[0030] Inside the mounting space 14, the first leg 12 of the receiving element 10 is provided with a first inclined contact surface 16 at which the pressure element 1 1 contacts the receiving element 10. The first inclined contact surface 16 encloses with the second direction Y perpendicular to the assembly direction X a slope angle of about 45° to about 80° in clockwise direction. The pressure element 1 1 is provided with a second inclined contact surface 17 contacting the first inclined contact surface 16, wherein a slope of the inclined contact surface 16 is at least essentially equal to a slope of the second inclined contact surface 17.

[0031 ] In the embodiment shown in Figs. 2 to 7, the pressure element 1 1 provided with the second inclined contact surface 17 is wedge-shaped allowing for a simple and inexpensive producing thereof. The shape of the mounting space 14 is adapted to the wedge-shaped pressure element 1 1 . [0032] For connecting a side element 7, 8 to a transverse element 2, 3, as shown in Fig. 1 , a connecting force is applied to the pressure element 1 1 in the second direction Y perpendicular to the assembly direction X. Due to the connecting force applied to the pressure element 1 1 , the pressure element 1 1 is moved in the second direction Y perpendicular to the assembly direction X. Due to the arrangement of the first inclined contact surfaces 16 and the second inclined contact surfaces 17, the force applied by the pressure element 1 1 to the receiving element 10 is decomposed in a first component that urges the first leg 12 towards the second leg 13 and a second component that urges the receiving element 10 as a whole to move in the assembly direction X. The receiving element 10 has two abutment surfaces 19 perpendicular to the assembly direction X for limiting a movement of the receiving element 10 as will be described later.

[0033] The connecting force is applied for example by means of bolt 25, as shown in Fig. 7, the position of which is fixed in the assembly direction X. As best seen in Fig. 3, the pressure element 1 1 is provided with a centering part 18 in the form of a bore hole for cooperating with a bolt 25, in order to allow that the connecting force is applied at a fixed position. [0034] In the embodiments shown, the first leg 12 and the second leg 13 are both provided with an undulated clamping surface 20, 21 .

[0035] Fig. 6 shows a fraction of a side element 7 provided with a tongue element 22 and a receiving element 10 of a corner connecting device 9 of Figs. 1 to 5 combined thereto. As shown in Fig. 6, the tongue element 22 is received between the first leg 12 and the second leg 13 of the receiving element 10 of the corner connecting device 9. The tongue element 22 is clamped between the legs 12, 13 by urging the legs 12, 13 towards each other. In order to allow for a secure clamping, in the embodiment shown the first leg 12 and the second leg 13 are provided with the undulated clamping surfaces 20, 21 , wherein as shown in Fig. 6, an undulation profile of the undulated clamping surfaces 20, 21 is adapted to an undulated side surface 33, 34 of the tongue element 22.

[0036] Fig. 7 shows in a partial cut-away view of a fraction of a heald frame 1 comprising a transverse element 2, the side element 7 shown in Fig. 6 provided with the tongue element 22 and the corner connecting device 9 of Figs. 2 to 5. The assembly direction X and a second direction Y perpendicular thereto are indicated by arrows with broken lines.

[0037] As shown in Fig. 7, the transverse element 2 is provided with a first cavity 23 and a second cavity 24 offset to the first cavity 23 in the second direction Y towards an outer edge of the transverse element 2. The receiving element 10 of the corner connecting device 9 is housed in the first cavity 23 of the transverse element 2, so as to be moveable in the assembly direction X as indicated by an arrow P. The movement is limited by means of the abutment surfaces 19.

[0038] A bolt 25 is combined to the transverse element 2 in a fixed position in the assembly direction X and screwed into a support element 26, which support element 26 is inserted into the second cavity 24. An end of the bolt 25 enters the centering part 18 of the pressure element 1 1 . By means of the bolt 25, a connecting force F is applied to the pressure element 1 1 and the pressure element 1 1 is moved in the second direction Y.

[0039] According to the invention, due to the inclined contact surface 16, 17 in which the pressure element 1 1 contacts the receiving element 10, the connecting force F applied to the pressure element 1 1 is decomposed into a first component perpendicular to the assembly direction X urging the first leg 12 towards the second leg 13 and a second component urging the receiving element 10 in the assembly direction X deeper into the first cavity 23. The pressure element 1 1 is centered and held fixed in position in the assembly direction X by means of the bolt 25 cooperating with the centering part 18. As the pressure element 1 1 is mounted with play in the mounting space 14, the receiving element 10 is moveable in the assembly direction X according to arrow P with respect to the pressure element 1 1 .

[0040] Figs. 8 to 14 show schematically a second embodiment of a corner connecting device 9. The corner connecting device of Figs. 8 to 12 is similar to those of Figs. 2 to 7 and for identical or similar elements, the same reference numbers are used. Figs. 8 and 9 show in a partial cutaway side view and a partial cut-away perspective view a fraction of the heald frame 1 similar to Fig. 7. Fig. 10 is a dismantled view of a corner connecting device 9 and a side element 7 having a tongue element 22. Figs. 1 1 and 12 show the corner connecting device 9 according to the second embodiment upon mounting a pressure element 1 1 of the corner connecting device 9 to a receiving element 10. Figs. 13 and 14 show the receiving element 10 and the pressure element 1 1 according to the second embodiment similar to those of Figs. 5 and 3, respectively. [0041 ] In contrast to the first embodiment shown in Figs. 2 to 7, according to the second embodiment shown in Figs. 8 to 12, the pressure element 1 1 has a sawtooth profile 27 forming two second inclined contact surfaces 28, 29. The pressure element 1 1 is mounted into a mounting space 14 formed in the receiving element 10, more particular in the outer surface of the first leg 12. The mounting space 14 is provided with a corresponding sawtooth profile 30 comprising two first inclined contact surfaces 31 , 32. As best seen in Fig. 1 1 , the mounting space 14 and the pressure element 1 1 are adapted to each other allowing the pressure element 1 1 to be received with play in the assembly direction X in the mounting space 14.

[0042] Although in the drawings the corner connecting device 9 is arranged between the first transverse element 2 and the first side element 7, in an alternative or in addition the corner connecting device 9 can similarly be arranged between the first transverse element 2 and the second side element 8, between the second transverse element 3 and the first side element 7 and/or between the second transverse element 3 and the second side element 8.

[0043] The corner connecting device, the heald frame, the weaving machine and the method according to the invention are not limited to the embodiments described as example and shown in the drawings. Variants and combinations of the shown embodiments that fall under the claims are also possible.