JP3983787B2 - Weft holding method, in particular a jet loom with a weft tightening device for carrying out the method and a cartridge as a replaceable part for installation in a jet loom mixing tube - Google Patents

Abstract

In a jet weaving machine, the clamping device (1) for clamping the weft yarn (2) is situated between two mixing tube sections (5, 6). The housing (10) forms a chamber (9) in which a pneumatic or hydraulic muscle (15) have two lamellar clamping parts (4a, b) is located whose free ends (8a, b) point in the direction of insertion (7) of the weft yarn. The entire mixing tube (3) is located behind an injector that is not depicted. A pressure medium supply (16) is connected to the chamber (9) and is connected to a pressure source via pressure medium lines (19, 20) and via a directional control valve (17). In the depicted position of the directional control valve (17), the pressure is exerted upon the pneumatic or hydraulic muscle (15) so that the free ends (8a, b) of the lamellar clamping parts (4a, b) move inward and hold the weft yarn (2) by clamping. In addition, a piezoelectric or magnetic control of the lamellar clamping parts (4a, b) is provided.

Description

  The invention relates to a method for holding and releasing a weft thread in the area of the main nozzle of a jet loom, in particular an air jet loom, in the direction of insertion of the main nozzle injector before inserting the weft thread into the spout formed by the warp. It is related to a method of tightening and releasing for the first time just before insertion.

  The invention also implements the method comprising at least one main nozzle comprising an injector and a connecting mixing tube, and a clamping device for clamping the weft thread in the mixing tube or directly to the outlet of the mixing tube. For multicolor weft jet looms, especially for air jet looms.

  It is clear from German Offenlegungsschrift 3200638 that such a method and jet loom are known. In that case, a mixing tube is connected to the main nozzle, and there is a tightening device for tightening the weft thread therein. The clamping device is arranged in the mixing tube outlet area where the weft thread passes into the spout. The tightening device is a slide that can move across the longitudinal direction of the mixing tube as a reciprocating member, and tightens a weft thread in the mixing tube between the passage opening of the slide and the inner wall of the mixing tube. Another embodiment provides a laterally movable plunger that presses the weft thread against the inner wall of the mixing tube. Finally, another alternative embodiment of the known clamping device is a small section of the mixing tube formed as an elastic intermediate piece. When the two reciprocating members facing the opposite sides are moved to face each other, the intermediate piece is compressed by this. In that case, the weft thread is tightened by the compressed elastic intermediate piece.

  In the first and second embodiments of this known jet loom, the weft thread is displaced laterally during tightening and is therefore no longer on the longitudinal central axis of the mixing tube. This phenomenon is also a concern in the third embodiment. This is because only two reciprocating members are provided for compression of the elastic intermediate piece, and therefore compression cannot be performed strictly centrally symmetrically. The position of the weft thread off the longitudinal center of the mixing tube is difficult when subsequently inserting the weft thread.

  Common to all variants of the known air jet loom clamping device according to German Patent Publication No. 3200638 is that the clamping device consists of a mechanical actuating part and must be mechanically operated. A mechanical drive requires some installation space and cannot operate without vibration. With regard to this prior art, it has already been pointed out severely that the free end of the mixing tube may perform a chaotic pivoting movement when the yarn clamp is activated. Especially in multi-color pens, the available space for a large number of closely-mixed mixing tubes is very limited, so that the known solution cannot be implemented in practice. Furthermore, the mechanical vibration or impact of the mixing tube impairs the exact function of this type of jet loom.

  EP 0022226 takes up another known jet loom provided with a mechanical clamping device which also has a mechanical drive. There is a fixed receiving surface directly at the end of the mixing tube, and the inserted weft passes through this receiving surface. A spiral spring is also arranged and its inner end is twisted by an axis parallel to the axis of the mixing tube. In this way, the spiral spring is contracted in a plane crossing the weft. At that time, the free end of the spring presses the weft thread elastically and flexibly against the fixed receiving surface. A shaft for twisting the spiral spring is driven by two shafts connected to the machine frame via two rotary levers. The weft thread is held by this clamping device after the end of weft insertion and before cutting of the inserted weft thread and is released again at the start of the next weft insertion.

  The known clamping device according to EP 0022226 has various weaknesses. In other words, if the weft thread is pressed against the fixed receiving surface with only a small compressive force at the elastic end of the spiral spring, the thread is surely handled gently. However, there is a danger that the elastic end of the spiral spring is carried sideways and bends permanently. On the other hand, the more stable structure of the elastic end or the robust guide of the whole spiral spring may damage the weft thread during tightening. In addition, this embodiment does not guarantee the center guide of the weft thread along the longitudinal axis of the mixing tube. The weft thread must be in continuous contact with the receiving surface and is therefore continuously exposed to sliding or frictional stress. Alternatively, if there is a relatively large gap between the fixed receiving surface and the weft, then the weft is clearly displaced laterally during tightening. In addition, mechanical operation using a separate drive shaft and two rotating levers requires a great number of places and cannot operate without vibration. Therefore, a multiple arrangement of a plurality of main nozzles and mixing tubes is unlikely. Certainly, impacts or lateral vibrations are inevitable with this type of drive. Furthermore, the control by the rotating shaft is expensive to manufacture.

  Those skilled in the art will also know that the weft thread is stretched and held in the mixing tube only with holding air. This is a reliable way to accurately guide the weft thread to the longitudinal center of the mixing tube, and then take the optimum position for insertion into the lacquer. In particular, when weaving the handle, the individual weft yarns often have to be held in the mixing tube for a relatively long period of time, so this weft holding method requires a continuous flow of holding air and a large energy cost. Furthermore, it was observed that some yarns are denatured by holding with holding air, that is, their properties are adversely changed.

  Therefore, the basis of the present invention is that the weft thread can be easily stretched and held behind the injector, with as little holding air as possible or without holding air at all, and the main nozzle and the mixing tube are compact. The methods listed above and the above jet looms have been modified so that a space-saving, vibration-free structure is possible, and the holding device operates reliably and without wear over long periods of use. It is a problem to do.

  The first solution to this problem with respect to the method is performed by the features of claim 1. Advantageous embodiments belonging to this method are shown in claims 2 and 3.

  A second solution to the above problem relating to the method is the subject of claim 4. Advantageous embodiments belonging to this second solution for the method are given in claims 5 and 6.

  With respect to the jet loom, a first solution to the above problem is contained in claim 7. This advantageous embodiment of the first inventive jet loom is the subject of claims 8-15.

  Another jet loom of the present invention for solving the problem is apparent from claim 16. The advantageous embodiments as claimed in claims 17 to 26 belong to this.

  Finally, cartridges according to claims 27 to 30 as replaceable parts for insertion into the mixing tube of the jet loom also belong to the invention. This cartridge according to the present invention is constructed on the basis of the advantageous structural details that characterize the second inventive jet loom.

  A second solution of the invention relating to the method is thus based on claim 1 in the jet loom, in particular the method for retaining and releasing the weft yarn in the area of the main nozzle of the air jet loom, to the lacuna formed by the warp The weft thread is tightened at the rear of the main nozzle in the insertion direction of the main nozzle, and is released for the first time immediately before the insertion, and the weft thread is tightened by the free ends of the two thin plate-shaped tightening members that are aligned in the weft thread insertion direction and elastically contact each other This is a method of performing release and adjusting the position of at least one thin plate-like fastening member with respect to the other thin plate-like fastening member by means that can be controlled.

  The laminar clamping members provided according to the invention, whose free ends are in elastic contact with each other and aligned in the weft insertion direction, form a small weight positive clamping member that is precisely controlled with little inertia. Since the free ends are aligned in the weft insertion direction, the load is applied statically in the longitudinal direction, so that a large tightening force can be applied even in a lightweight structure. Furthermore, since the weft yarns are aligned in the longitudinal direction, the weft yarn itself pulls the thin plate-like fastening member to the center of the longitudinal axis of the mixing tube, so that a self-centering effect is produced. The thin plate-like fastening member is controlled by simple means. Since the moving mass of the clamping member is extremely small, no lateral vibration or other mechanical impact occurs.

  For control, a laminar clamping member can be coupled with the piezoelectric means. Or it can be made adjustable by the force of at least one electromagnetic means acting on the laminar clamping member.

  The above two means for adjusting the laminar clamping members allow an accurate and compact construction of the control device.

  On the other hand, the second solution of the present invention relating to the method according to claim 4 is characterized in that it is formed by warp yarns in a method for holding and releasing the weft yarns in the area of the main nozzle of the jet loom, in particular the air jet loom. Of the two thin plate-like fastening members that are tightened at the rear of the main nozzle injector in the insertion direction of the main nozzle and released for the first time just before the insertion and aligned in the weft insertion direction and elastically contact each other. The weft thread is tightened and released by the free end, and a thin plate-like tightening member is incorporated in the pneumatic or hydraulic muscle operated by the pressure medium, and an elastic restoring force is applied to the pneumatic or hydraulic muscle to compress the pneumatic or hydraulic muscle. Depending on the action, it overcomes the elastic restoring force of the thin plate-like tightening member and presses its free end protruding into the muscle against the weft thread for tightening or tightening It is a method for releasing the use.

  These two solutions according to the invention also have the above-mentioned advantages which are thus realized with a laminar clamping member. However, in this case, a thin plate-like fastening member is incorporated in a pneumatic or hydraulic muscle operated by a pressure medium. In the known clamping device mentioned at the beginning, a flexible elastic tube piece causes clamping and is operated by a mechanical member from the outside. In the present invention, when the pressure medium acts on pneumatic or hydraulic muscles, the flexible elastic member That is, the pneumatic or hydraulic muscle adjusts the mechanical member, ie the laminar clamping member. In contrast to known solutions, this provides a particularly low wear operating method. This is because the weft yarn no longer interacts with the elastic wall, but with the lamellar clamping member that withstands the inevitable friction of the weft yarn much better. By controlling with a pressure medium, in particular compressed air, another advantage arises in terms of controlling the entire loom, especially in the case of air jet looms where compressed air is used anyway.

  According to a first advantageous embodiment of this second inventive method, the pressure medium acts on the pneumatic or hydraulic muscle from the outside under overpressure.

  In order to speed up the release of the tightening action, the pneumatic or hydraulic muscle can be further configured to apply a low pressure and / or apply an overpressure from the inside based on control from the outside. In this case, the tightening action is released very quickly, so that an unnecessary friction phenomenon between one weft thread and the other thin plate-like tightening member or the muscle itself is avoided.

  A jet loom corresponding to the first method of the present invention is shown in claim 7. Accordingly, the present invention provides a main nozzle having an injector and a connecting mixing tube, a tightening device for tightening the weft thread directly in the mixing tube or at the outlet of the mixing tube, and the two tightening members are thin plate-shaped tightening members. The free ends aligned in the weft insertion direction are elastically contacted with each other, and the weft thread is passed between them, and at least one position of the two thin plate-like fastening members is positioned with respect to the other thin plate-like fastening member. The invention relates to a multicolor weft jet loom, in particular an air jet loom, for carrying out the method according to claim 1, comprising a control device that can be adjusted.

  Advantageous embodiments of this first jet loom according to the invention are indicated in claims 8-15. Adjusting the control specified in these claims by means of a piezoelectric control device or a magnetic control device for a lightweight thin plate-like fastening member in which the free ends aligned in the weft thread insertion direction elastically contact each other and the weft thread passes between them Is preferred. Obviously, such a control device can operate accurately in time with very low inertia, yet the manufacturing costs and the required location are very small. Piezoelectric or magnetically controlled clamping devices are therefore particularly suitable for multiple arrangements for weaving patterns in an air jet loom.

  The second jet loom of the present invention corresponding to the method of claim 4 is the subject of claim 16. This jet loom is formed as a main stopper with injector and connecting mixing tube, and a central stopper with pneumatic or hydraulic muscles, weft clamps placed directly in the mixing tube or at the outlet of the mixing tube A device, a compartment surrounding a pneumatic or hydraulic muscle, in which a pressure medium acts, and a weft thread between its free ends, made of a spring elastic material, incorporated in the pneumatic or hydraulic muscle and aligned in the weft insertion direction Two thin plate-like fastening members that pass through, and the pneumatic or hydraulic muscles overcome the elastic restoring force of the thin plate-like fastening members in response to the compression action of the pneumatic or hydraulic muscles, and protrude into the muscles. The method according to any one of claims 4 to 7, wherein the free end is pressed against the weft thread to be tightened or the tightening action is released under the action of an elastic restoring force. Of a multi-color weft insertion jet room, it is particularly air jet loom.

  As already explained in the method according to claim 4, in this case the advantages of pneumatic or hydraulic muscles, i.e. the elastic wall part of the mixing tube, are combined with the advantages of control by the pressure medium, The advantage of the thin plate-like tightening member incorporated in the hydraulic muscle is added. The direct interaction with the weft thread is effected by a laminar clamping member that is extremely resistant to frictional wear. The thin plate-like tightening member is extremely well controlled by pneumatic or hydraulic muscles, especially in the case of control by compressed air in the air jet loom, and overall control is possible only with compressed air, and it has a compact and inexpensive structure. Bring. By incorporating a lamellar fastening member into the muscle, its life is greatly extended.

  In general, the structure of the thin plate-like fastening member is designed to assume an extended position parallel to the longitudinal axis of the mixing tube in a state where the fastening member is not affected. However, when the pneumatic or hydraulic muscle is compressed by the pressure medium, the free end of the thin plate-like fastening member is pushed inward toward the weft thread. In the simplest case, it is sufficient to displace only one of the two fastening members, in which case weft lateral displacement occurs.

  A substantially point-like contact of the free end of the thin plate-like fastening member is realized, and there is a weft thread between them. Since the thin plate-like tightening member is made of a spring elastic material, its pressing action on the weft thread is elastic and flexible, and the weft thread is not overloaded.

  Advantageous embodiments relating to the structure of the second jet loom of the present invention as set forth in claim 15 are shown in claims 16 to 25.

  In the sixteenth and seventeenth aspects, the compartment surrounding the pneumatic or hydraulic muscle is composed of two opposing end portions of the mixing tube portion, and these end portions are aimed to be screwed together by the connecting sleeve.

  Claims 18 to 22 can form the clamping device in the compartment as a replaceable part, and a pneumatic or hydraulic muscle in the form of a hose is inserted over the cartridge cage and this hose is fixed to the cartridge cage. The details of covering the thin plate-like fastening member are also shown. For this purpose, the cartridge cage has an opening in the form of a longitudinal slot, through which the clamping member extends inward and the muscle is compressed by the action of the pressure medium. The cartridge cage also has first and second cones that are in intimate contact with the conical inner section of the first mixing tube section across the hose. By means of the connecting sleeve, the cartridge cage is axially pressed against the first mixing tube part in the longitudinal direction, thereby at the same time providing a position and sealing in use of the second mixing tube part with respect to the first mixing tube part. .

  Claims 23 to 25 aim to integrate a plurality of units comprising an injector, a mixing tube and the clamping device according to claim 15 into one mounting module for each group. In that case, by forming tap holes and annular passages in the mounting module for supplying the pressure medium to the hydraulic muscles, even when these units are brought together closely, weft insertion and tightening devices An advantageous and compact control becomes possible.

  Finally, claims 26 to 29 aim at a cartridge as a replaceable part for insertion into a mixing tube of a jet loom, and likewise an advantageous embodiment is constructed. That is, the second structure of the jet loom according to the present invention enables the main members of the tightening device, that is, the thin plate-shaped tightening members and the pneumatic or hydraulic muscles to be replaceably arranged in the cartridge cage as the support. To do. Accordingly, the appropriately formed cartridge members are valuable spare and individual parts that can be handled independently and have inventive significance.

  Next, the present invention will be described in more detail based on the embodiments shown in the drawings.

  For the description of the jet loom according to the method according to the invention and the first embodiment of the invention, only the clamping device 1 belonging to it is shown in FIGS. The clamping device 1 is in the mixing tube 3. The mixing tube 3 is connected to an injector of a main nozzle not shown in FIG. The main nozzle is on the left of the mixing tube in the illustration of FIG. The injector is for inserting the weft thread 2 into the throat by blowing air. The mouthpiece is not shown in FIG. 1 and is on the right side of the mixing tube 3. Prior to insertion into the shed, the weft thread 2 is clamped and held by the clamping device 1 in the mixing tube 3.

  The clamping device 1 is arranged between the first mixing tube portion 5 and the second mixing tube portion 6. The clamping device 1 has two thin plate-like clamping members 4a, b made of a spring elastic material, which are arranged in the first mixing tube part 5 relative to the opposite side. The free ends 8a, b of the thin plate-like tightening members 4a, b are aligned in the weft thread insertion direction according to the directional arrow 7 and tighten the weft thread between the mixing tube portions 5,6 in the plane of the longitudinal central axis of the mixing tube 3.

  Controllable means are assigned to the two fastening members 4a and 4b. In the case of FIG.1 and FIG.2, it is a piezoelectric means. This consists of piezoelectric elements 13a, b coupled to thin plate-like fastening members 4a, b. However, the thin plate member itself can also be formed as a piezoelectric element. 1 and 2, for tightening and releasing the weft 2, the piezoelectric elements 13a, b of the thin plate-like fastening members 4a, 4b are electrically controlled via the conductors 11a, 11b.

  In the illustrated arrangement of the clamping device 1 in the mixing tube 3, the two thin plate-like clamping members 4 a, b are surrounded by a compartment 9. The outer shell 10 of the compartment 9 connects the first mixing tube portion 5 and the second mixing tube portion 6 in the axial direction. Conductive wires 11 a and 11 b reaching the piezoelectric elements 13 a and b are passed through the outer shell 10.

  Depending on the direction of the voltage applied to the piezoelectric elements 13a, 13b, the thin plate-like tightening members 4a, 4b clamp and hold the weft 2 (FIG. 1) or release (FIG. 2).

  3 and 4, the same reference numerals as those described above are used for members that are not changed compared to FIGS. 1 and 2. Again, the clamping device 1 is between the first mixing tube part 5 and the second mixing tube part 6 of the mixing tube 3, and the axial connection is effected by the outer shell 10 of the compartment 9. Two thin plate-like fastening members 4a, b made of a spring elastic material are arranged on the first mixing tube portion 5 also on the opposite side. However, unlike the structures of FIGS. 1 and 2, the structures of FIGS. 3 and 4 are provided with magnetic means capable of energization formed as magnetic coils 14a and 14b.

  The functional principle of the tightening device according to FIGS. 3 and 4 is that when the two magnetic coils 14a and 14b are cut off, the thin plate-like tightening members 4a and 4b hold the weft thread 2 based on their elastic restoring force. (Figure 3). In order to release the weft thread 2, the magnetic force of the coils 14a, b must overcome the elastic restoring force of at least one of the thin plate-like fastening members 4a, b, and the fastening device 1 must be open for a predetermined period.

  According to FIGS. 5 and 6, the problem underlying the present invention is solved in another way. In this case as well, members that are not changed compared to the previous embodiment are indicated by the same reference numerals as described above. The clamping device 1 of FIGS. 5 and 6 includes a mixing tube 3 having a first mixing tube portion 5 and a second mixing tube portion 6. The two mixing tube portions 5, 6 are connected in the axial direction by the outer shell 10 of the compartment 9. In the compartment, two thin plate-like fastening members 4 a and b are also arranged in the first mixing tube portion 5. The free ends 8a, b of the clamping members 4a, b project into the compartment 9 in the weft insertion direction (directional arrow 7).

  Unlike the above embodiment, the clamping device 1 of FIGS. 5 and 6 also has a central stopper in the form of a pneumatic or hydraulic muscle 15 in the compartment 9. The pneumatic or hydraulic muscle 15 is made of a flexible elastic material and pressure-bonds the two mixing tube portions 5 and 6 to each other. The two thin plate-like tightening members 4a and 4b are incorporated in a pneumatic or hydraulic muscle, and apply an elastic restoring force to the muscle to hold it in the initial position. The initial position is shown in FIG. 6 and provides a release position in which the weft thread 2 is not tightened.

  The outer shell 10 of the compartment 9 has a pressure medium connecting portion 16. The pressure medium connection 16 communicates with the pressure source 18 via the pressure medium pipes 19 and 20 and the directional valve 17. When pressure acts on the compartment 9 surrounding the pneumatic or hydraulic muscle, the pneumatic or hydraulic muscle overcomes the elastic restoring force of the thin plate-like fastening members 4a and 4b. This is the case in the connection position of the directional valve 18 shown in FIG. The free ends 8a, b of the clamping members 4a, b projecting into the muscle 15 are pressed against each other accordingly. The weft thread 2 passed between the tightening members is thus tightened. Tightening of the weft thread 2 can be continued for any period of time so that the weft thread 2 which has elasticity, in particular in the case of controlled weaving based on the handle or interruption of the weaving process, does not escape from the main nozzle.

  By switching the direction valve 17 from the connection position A to the connection position B based on the control, the pressure of the muscle 15 is released. Based on this, the elastic restoring force of the tightening members 4a and 4b works to return the muscle 15 to the initial position shown in FIG. By connecting to a low pressure source, for example, a vacuum pump, at the connection position B of the directional valve 17, the return can be accelerated. At the same time, overpressure can be applied from the inside to the mixing tube 3 and the pneumatic or hydraulic muscle. Any compressed air available for insertion into the weft thread can be used for that purpose.

  The illustrations of FIG. 5 and FIG. 6 are only an overview. In contrast, FIGS. 7a, 7b and 8 show how the clamping device according to the invention is realized by technical means.

  FIG. 7 a shows a longitudinal sectional view of a main nozzle having a member 5 functioning as a first mixing tube portion 5 and a second mixing tube portion 6. In this embodiment, there is no separate shell 10 for the compartment 9. The compartment for the pneumatic or hydraulic muscle is rather formed as part of the first mixing tube section 5. The second mixing tube portion 6 is a single tube, on which the connecting sleeve 21 is arranged so as to be able to rotate and translate. In the illustrated embodiment, the connecting sleeve is made of plastic and has a threaded portion on which there is a male thread (23). The connecting sleeve 21 is engaged with the socket hole 22 of the mixing tube portion 5 by this male screw. This area of the mixing tube portion 5 has an enlarged diameter. Reference numeral 23 denotes a threaded joint between the socket hole 22 and the connecting sleeve 21. The connecting sleeve 21 has a polygonal portion outside a partial area of its length. The polygonal part is used for attaching the tool when turning the connecting sleeve 21. For example, the polygonal portion comprises a flat portion 40 that is otherwise a cylindrical portion (see FIG. 9).

  The compartment 9 continues inside the socket hole 22 of the first mixing tube portion 5. The inner diameter of the compartment 9 is larger than the inner diameter of the original mixing tube. A clamping device having the aforementioned pneumatic or hydraulic muscle is inserted into the compartment. The clamping device is in this case formed as a cartridge. This cartridge comprises a cartridge cage 25, thin plate-like fastening members 4a, b, and in this case a hose 31 serving as a pneumatic or hydraulic muscle.

  The cartridge cage 25 has a short cylindrical guide collar 26, as viewed in the longitudinal direction, continuing from left to right in the illustration of FIG. 7a. The cartridge cage 25 is guided in the first mixing tube portion 5 by this guide collar. The cylindrical guide collar 26 is followed by a first cone 27 and then transitions to an elongated cylindrical intermediate section 28. A second cone 29 follows the cylindrical middle. Two longitudinal slots 30a and 30b are formed in the cylindrical intermediate portion 28 so as to face the opposite sides. In the remaining area of the cylindrical guide collar, two thin plate-like fastening members 4a and 4b are fixed in line with the vertical slot. The thin plate-like fastening members 4a and 4b are made of an elastic metal tongue, and in any case, a wear-resistant metal material. The sheet-like clamping member is fixed in surface contact with the remaining area of the cylindrical intermediate part, for example by brazing, welding or gluing. The thin plate-like fastening members 4a, b are narrower than the vertical slots 30a, b, and can therefore be pushed inward through the vertical slots in the direction of the longitudinal central axis of the cartridge cage. However, the thin plate-like tightening members 4a and 4b are positioned parallel to the outer periphery of the cylindrical intermediate portion 28 that extends linearly under the influence of the elastic restoring force.

  In particular, FIG. 7b shows that the hose 31 maintains a radial spacing with respect to the spring elastic clamping members 4a, b when the clamping device is released. This is true for at least the majority of the width of the clamping member. At best, the thin plate-like fastening member is slightly in contact with the hose. Thus, since the surface contact between the hose and the thin plate-like fastening member is avoided, the “adhesion” of the thin plate-like fastening member to the hose does not occur. As a result, the hysteresis phenomenon is avoided and the laminar clamping member can be controlled very accurately in time from the release position to the clamping position and vice versa.

  For assembly, a hose 31, for example a cylindrical cylindrical hose piece made of silicone, is inserted over the first cone, the cylindrical middle and the second cone of the cartridge cage 25. The cartridge cage 25 is then moved from the right-to-left direction in FIG. 7 a-until the cylindrical guide collar contacts the matching cylindrical cavity of the first mixing tube portion 5. Into the compartment 9 The hose 31 covers the first cone 27 and the second cone 29 and is pressed against the corresponding conical recesses of the first mixing tube section 5 by these cones. A pressing force is generated by tightening the connecting sleeve 21. The connecting sleeve 21 presses the inside of the cartridge cage 25 with the seal ring 24 interposed therebetween. By pressing the cartridge cage axially inside the first mixing tube section, the hose 31 is compressed airtight in the area of the two cones 27 and 29. At the same time, the cartridge cage 25 is pressed against the end of the second mixing tube portion 6, so that the second mixing tube portion 6 is held in the first mixing tube portion 5 in a non-rotatable and non-translatable manner.

  The clamping device is now usable. By supplying compressed air through one or a plurality of pressure medium connecting portions 16, the hose 31 in the compartment 9 is compressed. Therefore, the inside of the hose 31 is brought into contact with the thin plate-like fastening members 4a, b, and the free ends a, b are pushed inward in the direction of the longitudinal central axis of the mixing tube. The weft thread in the mixing tube is thus clamped and held.

  Reference numerals 32, 33 and 34 denote O-rings which allow the airtight insertion into the jet loom mounting module 30. Reference numeral 35 denotes an injector in front of the mixing tube. In the illustrated embodiment, the injector is in half.

  The advantage of the structure shown in FIGS. 7a, 7b and 8 is that the cartridge consisting of the cartridge cage, the thin plate-like fastening members 4a, 4b and the hose 31 can be assembled or replaced quickly at any time. For this purpose, it is only necessary to unscrew the connecting sleeve 21. When clogged with dust or lint or when the thin plate-like fastening member is worn, measures can be taken immediately.

  From the perspective view of FIG. 8, it can be seen particularly well that the cartridge is a compact, relatively simple component.

  FIG. 9 is a three-dimensional view showing that a plurality of units including the injector 35, the mixing tube 3, and the clamping device 1 can be integrated for each group. According to FIG. 9, six such units are integrated. A mounting module 36 comprising a pedestal 37 and a fixed plate 38 is used for integration.

  For this purpose, the pedestal portion 37 is provided with six insertion holes 43, and the injector 35 and the front end area of the mixing tube facing the injector are inserted into the insertion holes in an airtight manner. The mixing tube 3 again comprises a main nozzle part forming a first mixing tube part 5 and a second mixing tube part 6. A clamping device 1 in the form of a cartridge as described above, having two elastic clamping members and pneumatic or hydraulic muscles, is respectively inserted into the end section of the first mixing tube section 5. Furthermore, it is clear in FIG. 9 that the connecting sleeve 21 is provided with a flat part 40 that facilitates the mounting of a tool for turning the connecting sleeve.

  In the case of pneumatic or hydraulic systems where the operation of the clamping device is unique, the integration of the mixing tube and the injector and the clamping device in groups results in a very compact mounting module. In this way, a large number of main nozzles and mixing tubes for weaving patterns, especially multicolored patterns, can be easily combined in a narrow space.

  10 and 11 reveal the mounting module and its mounting details, in particular the pressure medium supply details. The structure shown is especially conceivable for an air jet loom with a pneumatically operated clamping device. For this purpose, a tapped hole passage 39 and an annular passage 42 are provided, whereby compressed air or holding air for the weft is supplied to the injector and the mixing tube. Reference numeral 16 also denotes a compressed air connection for operating the pneumatic muscle already described with reference to FIGS.

  The O-rings 32, 33 and 34 already described with reference to FIG. 7 a on the one hand seal the first mixing tube part 5 in the longitudinal hole 43 of the pedestal 37. Furthermore, the air flow sent to the injector by the O-ring 33 and the air flow used for controlling the clamping device 1 are separated. The connecting sleeve 21, which is easily accessible regardless of the tight assembly, makes it possible to replace the cartridge with the hose 31 and the spring elastic clamping members 4a, b relatively easily at any time. The entire mounting module 36 with six units shown in this example consisting of an injector, a clamping device and a holding tube can be disassembled if necessary.

1 shows a first embodiment of the present invention in which a weft thread is tightened and held. FIG. 2 shows a view similar to FIG. 1 but with the clamping device released. Fig. 4 shows another embodiment of the present invention which also shows the clamping position. FIG. 4 shows a view similar to FIG. 3 with the tightening device released. Fig. 2 shows a schematic view of an embodiment of the invention in which the clamping device is operated by a pressure medium. Fig. 6 shows a schematic view similar to Fig. 5 but with the clamping device released. The longitudinal cross-sectional view of the detailed technical structure of the clamping device corresponded to FIG.5 and FIG.6 is shown. FIG. 7b shows a cross-sectional view along line BB in FIG. 7a. Fig. 8 shows an enlarged perspective view of the details of Figs. 7a and 7b. The figure which integrated the several unit which consists of an injector, a mixing pipe | tube, and a clamping device into one attachment module for every group is shown. FIG. 10 is a vertical partial longitudinal sectional view belonging to FIG. 9. FIG. 10 shows a partial longitudinal section through a horizontal mounting module with respect to FIG. 9.

Claims (17)

A method for holding and releasing the weft in the region of the main nozzle of the jet Lou arm, clamping the weft before inserting the shed formed by the warp in the insertion direction behind the injectors of the main nozzle, the first time shortly before insertion released, releasing the clamping of the weft is carried out by two lamellar clamping weft insertion direction aligned free ends of the member, the thin plate clamping member is deformed by the air pressure or hydraulic is operated by a pressure medium elasticity incorporated into member, this exerts an elastic restoring force, the elastic member in accordance with the compression action of the elastic member overcomes the elastic restoring force of the thin plate fastening member, the thin plate clamping member protruding into said elastic member A method in which the free end is pressed against the weft thread and tightened or the tightening action is released. The method according to claim 1 , wherein the tightening action of the thin plate-like fastening member is realized by the pressure medium acting on the elastic member under an overpressure from the outside. The method according to claim 2 , wherein the elastic member is subjected to a low-pressure action based on control from the outside and / or an over-pressure action from the inside in order to accelerate the release of the tightening action. It is formed as a central stopper having a main nozzle having an injector and a connecting mixing pipe (3) and an elastic member (15) deformed by air pressure or hydraulic pressure, and is formed in the mixing pipe (3) or in the mixing pipe (3 ) and weft arranged directly on the outlet of (2) of the clamping device (1), said surrounding the elastic member (15), and compartment (9) capable of applying a pressure medium, made of spring-elastic material A thin plate-like fastening member (4a) through which the weft thread (2) is passed between its free ends (8a, b) which are incorporated in the elastic member (15) and aligned in the insertion direction (7) of the weft thread (2) , b) and has the said resilient member according to the compression action of the elastic member (15) (15) overcomes the elastic restoring force of the thin plate clamping member (4a, b), said elastic member (15) the free end of the thin plate clamping member protruding into (8 Or tightened against the b) in the weft (2), or exemplary configurations claims 1 to A method according to any one of 3 so as to cancel the effect tightening under the action of the elastic restoring force multi-color weft insertion jet Lou-time for. A compartment (9) surrounding said elastic member comprises an enlarged diameter area at the end of the first mixing tube portion (5) and is operatively detachably coupled to the second mixing tube portion (6). 4. Jet loom according to 4 . A connecting sleeve (21) rotatably arranged on the second mixing tube part (6) and engaged by a threaded joint (23) in a socket hole (22) in the end section of the first mixing tube part (5). The jet loom according to claim 5 . 7. Jet loom according to any one of claims 4 to 6 , comprising a replaceable part in the form of a cartridge having the elastic member and a laminar clamping member (4a, b). A cartridge cage (25) in the form of an annular cross-section sleeve as a cartridge body, and a cartridge cage (25) through which the thin plate-like fastening members (4a, b) in the cartridge cage (25) penetrate inward 8. Jet loom according to claim 7 , comprising an opening in the wall and the elastic member in the form of a hose (31) overlying the thin plate-like clamping member (4a, b) above the cartridge cage (25). . 9. Jet loom according to claim 8 , wherein the opening of the cartridge cage (25) is formed as a longitudinal slot (30a, b). Viewed in the insertion direction (7) of the weft thread (2), the cylindrical guide collar (26) has a first cone (27) followed by an opening for the laminar clamping members (4a, b). A cylindrical intermediate section (28) having a section, finally a second cone (29) is connected, and a cylindrical guide collar (26) is aligned with the first mixing tube section (5). The first and second cones (27, 29) are pressed against the matching conical inner section of the first mixing tube portion (5) across the hose (31). 10. A jet loom according to claim 8 or 9 , having a longitudinal profile of the formed cartridge cage (25). The axial press-fitting of the cartridge cage (25) into the socket hole (22) of the first mixing tube portion (5) performed by the connecting sleeve (21) simultaneously causes a second to the first mixing tube portion (5). to produce a position securing and sealing during use of the mixing tube portion (6), jet loom according to claim 1 0 zone is formed of a second cone of the cartridge cage (25) (29) . Injectors (35), mixing tube (3) and a plurality of unit fastening consisting apparatus (1) is any one of one mounting module (36) is integrated into the claims 4 to 11 for each group Jet loom. A pedestal (37) having an insertion hole (43) into which the injector side end of the injector and / or the mixing tube (3) is inserted in an airtight manner, and a fixing plate (38) extending along the mixing tube (3) 13. Jet loom according to claim 12 , comprising mounting modules (36) each comprising. In order to supply pressure medium to the injector (35) and said elastic member (15), the pedestal portion (37) and / or the injector (35) in claim 13 having a tap hole shaped and annular passage (39, 42) The listed jet loom. A cartridge formed as a clamping device (1) for clamping a weft thread (2) and as a replaceable part for insertion into a mixing tube of a jet loom,
An annular cross-section sleeve-like cartridge cage (25) as a cartridge body, and a cartridge cage (25) through which a spring elastic thin plate-like fastening member (4a, b) in the cartridge cage (25) penetrates inward And an elastic member which is above the cartridge cage (25) and is deformed by air pressure or hydraulic pressure in the form of a hose (31) covering the thin plate-like fastening members (4a, b). The hose (31) overcomes the elastic restoring force of the thin plate-like tightening members (4a, b) according to the compression action of the pressure medium on the hose (31) in the mounted state of the cartridge, and enters the elastic member (15). the free end of the thin plate clamping member protruding (8a, b) or tightening against the weft (2), or so as to release the action tightened under the action of the elastic restoring force It made the cartridges. Viewed in the insertion direction (7) of the weft thread (2), the cylindrical guide collar (26) has a first cone (27) followed by an opening for the laminar clamping members (4a, b). 16. The cartridge according to claim 15 , wherein the cylindrical intermediate part (28) having a section has a longitudinal profile of a cartridge cage (25) configured to be connected to the second cone (29) at the end. A cylindrical guide collar (26) and first and second cones (27, 29) interact with the opposite face of the mixing tube portion (5) of the jet loom or are centered or hose (31 ) Is a cartridge formed to be sealed with a pinch. 17. Cartridge according to claim 15 or 16 , wherein the free ends (8a, b) of the spring elastic clamping members (4a, b) are separated from the hose (31) in the released state of the clamping device (1).

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