WO2005033389A1 - Ribbon needleloom - Google Patents

Abstract

The invention relates to a ribbon needleloom, comprising a heald device, forming a shed, which comprises heald frames (30), supporting heddles, at least one weft needle, at least one thread-feed device, a knitting needle, arranged on the side of the shed away from the weft needle and a reed. According to the invention, the heald frame (30) may be improved, by comprising at least one heald frame support (66), with a hollow rod (68) with an upper lateral introduction opening (72) for an upper heald rail (62) and a lower lateral introduction opening (74) for a lower heald rail (64), whereby the upright heald rails (62,64) are connected by means of a pressure rod (76) arranged in the hollow rod (68) and are tensioned against each other by means of a tensioning screw (78), arranged on an end piece of the hollow rod (68) coaxial to the pressure rod (76).

Description

needle loom

Technical field

The invention relates to a needle ribbon loom with a shaft device forming a shed according to the preamble of claim 1.

State of the art

Needle ribbon looms of the type mentioned at the outset with a shaft device forming a shed are known several times. The shaft device has shaft frames. The problem with the latter is that they are no longer sufficiently stable at larger dimensions and / or at higher speeds of the needle ribbon weaving machine. The shaft rails tend to bend and sufficient force transmission between the shaft rails is no longer guaranteed. This can lead to the destruction of the socket frame.

Presentation of the invention

The object of the invention is to improve a needle ribbon loom of the type mentioned.

The object is achieved by the characterizing features of claim 1. Because the shaft frame has at least one shaft support, which has a hollow rod with an upper lateral entry opening for an upper shaft rail and a lower lateral entry opening for a lower shaft rail, such a shaft support can be retrofitted at any point on the shaft frame for reinforcement. The upright shaft rails are connected via a pressure rod arranged in the hollow rod and are braced against one another by means of a tension screw arranged on one end part of the hollow rod and coaxial to the pressure rod. This results in a substantial stiffening of a

Shaft frame, so that it is suitable for larger dimensions on the one hand and / or higher speed on the other hand. Such stock supports can also be used for the basic structure of the stock frame, the This means that shaft supports can also be used on the sides to connect the upper and lower shaft rails.

Advantageous embodiments of the needle ribbon loom are described in claims 2 to 13.

The hold of the shaft rails can be improved if, according to claim 2, at least one entry opening has a lateral support flange pointing in the direction of the hollow rod.

The hollow rod can be made of solid material. However, the embodiment according to claim 3 is more advantageous, according to which the hollow rod has recesses distributed over its length on opposite sides and offset with respect to one another, which results in a substantial reduction in the moving mass. The embodiment according to claim 4, according to which the hollow rod consists of a fiber-reinforced, lubricious plastic, also contributes to the mass saving.

Further configurations and advantages of the needle ribbon weaving machine are contained in the following special description of exemplary embodiments.

Brief description of the drawings

Exemplary embodiments of the needle ribbon loom according to the invention are described in more detail below with the aid of the drawings, in which:

Figure 1 shows a needle ribbon loom in side view;

FIG. 2 shows a shaft device with pneumatic retraction in a view transverse to the running direction of the warp threads;

Figure 3 shows a shaft frame with shaft support in the cutout and in vertical section;

Figure 4 rocker arm of a cam drive of the shaft device, in plan view;

5 shows a shaft frame with a spring retraction in the cutout; 6 shows a shaft frame with healds in vertical section parallel to the warp threads;

Figure 7 shows the shaft frame in section VII-VII of Figure 6;

FIG. 8 shows a drive diagram of the needle ribbon weaving machine in a side view; Figure 9 shows the drive diagram of Figure 8 in plan;

Figure 10 shows the weaving area of the needle ribbon loom in plan view;

Figure 11 shows the weaving area in section XI-XI of Figure 10;

FIG. 12 shows the diagram of a thread feed device of the needle ribbon weaving machine; FIG. 13 shows the thread feed device in section XIII-XIII of FIG. 12;

Figure 14 shows a further thread feeder in side view;

Figure 15 shows the thread feed device in section XV-XV of Figure 14;

Figure 16 shows a first conveyor belt in side view;

Figure 17 shows the conveyor belt of Figure 16 in cross section; Figure 18 shows a second conveyor belt in side view; and

Figure 19 shows the conveyor belt of Figure 18 in cross section:

Ways of Carrying Out the Invention

1 shows a needle ribbon loom with a machine frame 2, in which a main drive shaft 4 is mounted, which drives at least one weft needle 6, not shown, a reed 1, a fabric take-off 8 and a shaft device 10. The needle ribbon weaving machine has a warp beam frame 12 which carries warp beams 14, of which warp threads 16 are fed to the shaft device 10, which opens the warp threads to a shed 18. By means of a thread feed device 20, a weft thread 24 is fed from a thread bobbin 22 to the weft needle 6, which introduces a weft thread loop into the shed 18. Successive weft thread loops can be tied with themselves or by means of a catch thread 26, which is fed via a further thread feed device 28 to a knitting needle, not shown here, in order to bind and secure a weft thread loop that has been entered. FIGS. 2 to 4 show a first shaft device 10, in which shaft frames 30, 30a are each positively connected to a cam drive 34 on the one hand by means of a link 32 and on the other hand to a pneumatic retraction 36. The cam drive 34 has pivoting levers 38, 38a, 38b, 38c , 38d, which interact at a drive point 40 with cams 42 of a camshaft 44. At the output point 46, the pivot levers 38, 38a, 38b, 38c, 38d are articulated on the links 32 via joints 48. The pivot axes given by the joints 48 run at right angles to the planes spanned by the shaft frames 30, 30a. The distances A of the pivot levers 38, 38a, 38b, 38c, 38d of the drive points 40, 40a, 40b, 40c, 40d to the respective pivot axes 50, 50a, 50b, 50c, 50d are different between adjacent pivot levers, the distances also B of the output points 46, 46a, 46b, 46c, 46d are different from the pivot axes 50, 50a, 50b, 50c, 50d, all in such a way that the shaft frames can be displaced by different lengths by a continuously expanding and again narrowing shed to form, as can be seen from Figure 1. The pneumatic retraction 36 is formed by a gas chamber 52 in which a piston 54 is displaceable, which is connected to the link 32 in order to positively compress the piston in the working frequency of the cam drive 34. A pressure relief valve 56 connected to the gas chamber 52 limits the maximum pressure in the gas chamber. A pressure gas source 60 is connected via a check valve 58 in order to regulate the gas pressure in the gas chamber 52. The compressed gas source 60 is connected to a control device (not shown in more detail) with which the gas pressure in the gas chamber can be set as a function of the operating state of the needle ribbon weaving machine.

FIG. 5 shows a shaft device 10a in which the pneumatic retraction 36 is replaced by a spring retraction 61 which engages the frame 30, 30a.

The shaft frames 30, 30a are formed by upper shaft rails 62 and lower shaft rails 64, which are connected to one another by means of shaft supports 66 are. The shaft support 66 shown in more detail in FIG. 3 has a hollow rod 68 which is formed from metal or preferably fiber-reinforced plastic. The hollow rod 68 contains on opposite sides of the longitudinally distributed and mutually offset recesses 70 .. The upper shaft rail 62 is inserted in an upper lateral entry opening 72 and the lower shaft rail 64 in a lower lateral entry opening 74. At least one of the entry openings 72, 74 has a lateral, vertically oriented support flange 75. The upright shaft rails 62, 64 are connected to one another via a pressure rod 76. At the upper end of the hollow rod 68, a clamping screw 78 is screwed into the hollow rod 68 and presses on the upper shaft rail 62 and thus prestresses the shaft rails 62, 64 against one another, so that a secure connection between the upper shaft rail 62 and the lower shaft rail 64 via the shaft support 66 is given. As can be seen from Figure 2, a plurality of shaft supports 66 are arranged distributed over the length of the shaft frame. Healds 80 are arranged between the upper shaft rail 62 and the lower shaft rail 64 and have thread eyelets 82 through which a warp thread 16 runs.

Figures 6 and 7 show a preferred embodiment of the shaft frame 30, in which ^' . Healds 80 by means of an upper end loop 84 and. a lower 'end eyelet 86 are lined up on the upper shaft rail 62 and the lower shaft rail 64. The shaft rail 62 driving in the present example has a thin leg 88 which projects transversely to the shaft rail 62 and engages in a driving groove 90 of the associated end eyelet 84 of the heddle 80 with little play. The end eyelet 84 assigned to the driving shaft rail 62 completely engages around the shaft rail 62, with a clearance between 0.01 and 0.3 mm being present between the leg 88 of the driving shaft rail 62 and the driving groove 90 of the end eyelet 84. For this purpose, the thickness of the leg 88 and the width of the driving groove 90 are coordinated with one another such that the play between the leg 88 and the driving groove 90 is 0.01 to 0.3 mm. Despite this little game, the spreading of the preferably lamellar healds by the angle α is the same 15 ° to the vertical possible, as can be seen from FIG. 7. The lower shaft rail 64 can be configured analogously to the upper shaft rail, wherein a vertical play of 0.5 to 10 mm is possible. In this example, the lower shaft rail 64 is not used to drive the heald 80 but rather to guide it in the shaft and to absorb the transverse forces caused by the warp threads 16 being moved. Due to this configuration of the heald, the shaft device causes very little noise even at maximum speed, which can be, for example, 4000 to 6000 revolutions per minute, and causes minimal wear.

FIGS. 8 and 9 show the drive diagram of the needle ribbon weaving machine, the reed drive 92, the weft needle drive 94, the knitting needle drive 96 and a secondary drive shaft 100 of the cam drive 34 of the shaft device 10 being connected via a single-stage gear or worm gear. For the weft needle drive 94 and the knitting needle drive 96, a common disk 102 with a crank 104 is arranged on the main drive shaft 4, which have diametrically opposed crank pins 106, 108, which are guided in grooves 110 of the disk 102 and the crank 104 so that they can be adjusted radially its eccentricity is adjustable. The crank pin 106 assigned to the weft needle drive 94 interacts via a coupling rod 112 with a rocking lever 114, which is articulated via a further coupling rod 116 with a rocking lever 118. The latter is attached to a shaft 120 which carries and drives the weft needle 6. The reed drive 92 is connected to the crank pin 108, which is connected via a coupling rod 122 to a rocker arm 124 which carries the reed 7. The knitting needle drive 96 has a cam plate 126 which is arranged on the main drive shaft 4 and on which a driver 128 of a two-armed rocker arm 130 engages. At the end of the rocking lever 124 facing away from the driver 128, the knitting needle 132 is fastened, which engages on one side of the band to be produced and is used to tie off the weft ^loop that has been entered. FIGS. 10 and 11 show the weaving area of the needle ribbon loom, a guide plate 134 with a guide track 136 being assigned on the side of the knitting needle 132 facing away from the shed 18 in such a way that the weft thread leg 138 to be gripped by the knitting needle 132 of the weft thread loop 140 during insertion in the shed 18 below or at most at the level of the head 142 of the knitting needle 132, so that when the weft needle 6 is extended over the knitting needle head 142, the weft thread leg 138 in. the hook path of the knitting needle 132 can be inserted. This design results in a particularly secure intervention, namely only the weft thread leg 138 to be processed on the knitting needle 132 and this in a very small effective range. As a result, the strokes of the knitting needle can be kept very small, but a safe catching of the weft thread leg is still ensured by the arm of the knitting needle. This training allows short knitting needles with less susceptibility to deflection, vibration and wear. This in turn enables the needle ribbon loom to perform at a high level.

FIGS. 12 and 13 show a preferred thread feed device 20 for the weft thread 24. The weft thread 24 drawn off the bobbin 22 by means of a thread transport device 144 arrives at a pneumatic compensation device 146, in which the weft thread 24 is guided across a channel 148 in FIG which a blowing device 150 opens. The weft thread 24 supplied by the thread transport device 144 at a constant speed is processed intermittently by the weft needle 6, so that no weft thread is required between two weft entries and there is a tradition 152 which is introduced into the channel 148 by the blowing device 150. A guide eye 154 for the weft thread 24 is present between the compensation device 146 and the weft needle 6. Instead of the blowing device 150, a suction device can be connected to the channel 148 as an alternative or in addition.

FIG. 13 shows the thread transport device 144 in section XIII-XIII of FIG. 12, which is an adjustment of the transport speed for the weft thread allows. The thread transport device 144 contains a transport roller 158 arranged on a shaft 156 with a friction surface 160. The friction surface can be expanded radially by means of an adjusting device 162, as a result of which the peripheral speed of the transport roller 158 can be adjusted. The adjusting device 162 has an adjusting block 164, which is arranged on a shaft 156 and is made of an incompressible but elastomeric material, which is arranged between a stop disk 166 and an adjusting disk 168 and can be compressed by means of an adjusting nut 170 which can be screwed onto the shaft 156. With increasing compression, the jacket 172 of the transport roller 158 is expanded, as a result of which its diameter D and thus its peripheral speed change. The weft thread 24 to be transported is pressed against the transport roller 158 by means of a pressure roller 174 and thereby transported.

FIGS. 14 to 19 show a further thread transport device 175, in which a rotating conveyor belt 176, which transports the thread 24, is guided between two conical regulating disks 180, 182 arranged on a drive shaft 178. The regulating disks are adjustable in their axial distance. For this purpose, the regulating disks are prestressed against one another by means of a spring 184. The conveyor belt 176 is guided over a further deflection roller 186, the distance from which to the regulating disks can be adjusted by means of a regulating device 188. The conveyor belt shown in FIGS. 16 and 17 has a continuous part 190 which has a thickness d. On the underside of the continuous part, transverse ribs 192 are formed, the height h of which is greater than the thickness d of the continuous part 190. The continuous part 190 is provided with a reinforcement insert 194. FIGS. 18 and 19 show a further embodiment of the conveyor belt 176a, which is additionally provided with transverse ribs 196 on the upper side.

As can also be seen from FIGS. 14 and 15, the thread transport device between the regulating disks 180, 182 and the deflection roller 186 is provided with a further pressure roller 198, so that the conveyor belt means which is guided. The thread 24 to be transported is picked up and released in the area of the meandering guide.

The thread transport device is particularly suitable for weft threads, in the case of multi-thread needle-weaving looms, i.e. which simultaneously produce several bands next to one another, several such transport devices are arranged next to one another on a common drive shaft 178 and on a common swivel shaft and can preferably be set with a common control device 188.

LIST OF REFERENCE NUMBERS

2 machine frame 84 end eyelet

4 main drive shaft 86 end eyelet

6 weft needle 88 legs

7 Webblatt 90 driving element

8 Goods take-off 92 reed drive

10 shaft device 94 weft needle drive

10a shaft device 96 knitting needle drive

12 warp beam frame 98 gear / worm gear

14 Kettbaum 100 PTO shaft

16 warp thread 102 disc

18 shed 104 crank

20 thread feeding device 106 crank pin

22 thread spool 108 crank pin

24 weft 110 groove

26 catch thread 112 coupling rod

28 thread feeding device 114 rocker arm

30 shaft frame 116 coupling rod

30a shaft frame 118 rocker arm

32 handlebars 120 shaft

34 cam drive 122 coupling rod

36 pneumatic retraction 124 rocker arm

38, a -d swivel lever 126 cam disc

40, a -d drive shaft _. l 128 drivers

42 cams 130 rocker arms

44 camshaft 132 knitting needle.

46, a -d drive point 134 baffle

48 joint 136 guideway

50, a '-d pivot axis 138 weft legs

52 gas chamber 140 weft loop

54 pistons 142 knitting needle head

56 Pressure relief valve 144 Thread transport device

58 check valve 146 compensation device

60 pressure source 148 channel

61 spring return 150 blower

62 upper shaft rail 152 tradition

64 lower shaft rail 154 guide eye

66 shaft support 156 shaft

68 hollow bar 158 transport roller

70 recess 160 friction surface

72 Entry opening 162 Adjustment device

74 Entry opening 164 Control block

75 support flange 166 deflection disc

76 pressure rod 168 adjusting disc

78 clamping screw 170 adjusting nut

80 heald 172 sheath

82 Thread eyelet 174 Press roll 175 Thread transport device 186 deflection roller

176 conveyor belt 188 control device 176a conveyor belt 190 continuous part 178 drive shaft 192 cross rib 180 regulating disc 194 reinforcement insert 182 regulating disc 196 cross ribs 184 spring 198 pressure roller

Claims

claims 1. needle ribbon loom, with a shaft device (10, 10a) forming a shed (18), which has shaft frames (30, 30a) that carry healds (80), further with a weft needle (6), further with at least one thread feed device (20, 28), further with a knitting needle (132) which is arranged on the side of the shed (18) facing away from the weft needle (6), and with a reed (7), characterized in that the shaft frame (30, 30a ) has at least one shaft support (66) which has a hollow rod (68) with an upper lateral entry opening (72) for an upper shaft rail (62) and with a lower lateral entry opening (74) for a lower shaft rail (64), the upright shaft rails (62, 64) are connected via a pressure rod (76) arranged in the hollow rod (68) and are braced against one another by means of a tension screw (78) arranged on one end part of the hollow rod (68) and coaxial with the pressure rod (76). 2. Needle ribbon loom according to claim 1, characterized in that at least one entry opening (72, 74) has a lateral, vertically oriented support flange (75). 3. Needle ribbon weaving machine according to claim 1 or 2, characterized in that the hollow bar (68) on opposite sides has recesses (70) distributed over its length and offset with respect to one another. 4. needle ribbon weaving machine according to one of claims 1 to 3, characterized in that the hollow rod (68) consists of a fiber-reinforced, lubricious plastic. 5. Needle ribbon loom according to one of claims 1 to 4, characterized in that healds (82) having healds (80) are lined up by means of end lugs (84, 86) on the shaft rails (62, 64), at least the driving shaft rail (62) has a thin leg (88) which projects transversely to the shaft rail (62) and engages with little play in a driving groove (90) of the associated end eyelet (84) of the heald (80), the end eyelet associated with the driving shaft leg (62) (84) completely surrounds the shaft rail (62) and there is a play between the leg (88) of the driving shaft rail (62) and the driving groove (90) of the end eyelet (84) which is 0.01 to 0.3 mm. 6. Needle ribbon weaving machine according to one of claims 1 to 5, characterized in that the shaft frames (30, 30a) are assigned swivel levers (38, 38a, 38b, 38c, 38d), which at a drive point (40, 40a, 40b, 40c, 40d) can be actuated by means of cams (42) and are connected to a shaft frame (30, 30a) at an output point (46, 46a, 46b, 46c, 46d) and their pivot axes (50, 50a, 50b, 50c, 50d) are at right angles The planes spanned by the shaft frame (30, 30a) run, the distances (A) of the drive points (40, 40a, 40b, 40c, 40d) from the pivot axes (50, 50a, 50b, 50c, 50d) at least with two pivot levers are different in order to shift the shaft frames (30, 30a) assigned to these swivel levers (38, 38a, 38b, 38c, 38d) during operation by different lengths, the further being at different distances (B) from the output points (46, 46a, 46b, 46c, 46d) located pivot axes (50, 50a, 50b, 50c, 50d) have different distances from the central plane, which are parallel to r The direction of displacement of the socket frame (30,30a) runs at right angles to the plane spanned by it through the middle of the socket 7. Needle ribbon loom according to one of claims 1 to 6, characterized in that the shaft frames (30, 30a) can each be moved in one direction of movement by means of a positive drive (34) and in the other direction of movement by means of a spring return (61). 8. needle ribbon loom according to one of claims 1 to 6, characterized in that the shaft frames (30, 30a) are each movable in one direction of movement by means of a positive drive (34) and in the other direction of movement by means of a pneumatic retraction (36), wherein the pneumatic retraction (36) has a gas volume that can be compressed in the working frequency by the positive drive (34) in an individual gas chamber (52). 9. needle ribbon loom according to one of claims 1 to 8, characterized in that it has a transverse to the web main drive shaft (4) to which a reed (92), a weft needle (94) and a knitting needle drive (96) are connected , wherein the weft needle drive (94) and the reed drive (92) each rocker arm. (114, 124), which are connected via coupling links (112, 122) to crank pins (106, 108) of the main drive shaft (4) which are offset by 180 °. are locked so that the weft needle drive (94) and the knitting needle drive (96) swing against each other, the shaft device (10, 10a) also having a secondary drive shaft (100) which is connected to the main drive shaft (4) via a pair of wheels (98) connected. 10. Needle ribbon loom according to one of claims 1 to 9, characterized in that a guide plate (134) with a guide track (136) is arranged on the side of the knitting needle (132) facing away from the weaving shed (18) such that the The knitting needle (132) of the weft thread legs (138) of the weft thread loop (140) when inserted into the shed (18) below or at most in height The knitting needle head (142) of the knitting needle (132) is located and can be inserted into the hook path of the knitting needle head (142) when the weft needle (6) is extended via the knitting needle head (142). 11. A needle loom according to one of claims 1 to 10, characterized in that the weft needle (6) is associated with a thread feeding device (20) with a compensation device (146) for the weft thread (24), which operates pneumatically as a blowing and / or suction device (150) and that - seen in the thread running direction - a separate guide eyelet (154) for the weft thread (24) is arranged after the compensating device (146) and before the weft needle (6). 12. A needle loom according to one of claims 1 to 11, characterized in that it has a thread transport device (144), in particular for the weft thread (24), which has a transport roller (158) which is arranged on a shaft (156) and is drivable and has changing peripheral speeds ) with a friction surface (160) and with a pressure including the thread to be transported (24) biased against the transport roller (158). roller (174) is provided, the friction surface (160) being formed by a one-piece jacket (172) radially expandable by means of an adjusting device (162). 13. A needle loom according to one of claims 1 to 11, characterized in that it has a thread transport device (175), in particular for a weft thread (24), which is provided with a rotating conveyor belt (176, 176a) transporting the thread (24), which between two conical regulating disks (180, 182), the axial distance of which can be changed on a drive shaft (178), and a deflection roller (186) and a pressure roller (198), one of which changes the distance between the deflection roller (186) and the drive shaft (178). The regulating device (188) is provided and the conveyor belt (176, 176a) is provided with transverse ribs (192) on at least one side and is meandered around the deflection roller (186) and the pressure roller (198), the thread (24 ) is picked up and released in the area of the meandering guide.