JPH1193041A - Multi-color weft insertion device in fluid jet loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to bring a loom to a high speed by reducing an opening amount for warp yarns a reed stroke and a moving amount of nozzle, in a multi-color weft insertion loom equipped with >=3 weft insertion nozzles. SOLUTION: This device comprises a first weft insertion means 24 equipped with >=2 weft insertion nozzles 22a-22b and a second weft insertion means 26 equipped with >=1 weft insertion nozzles. At least the first weft insertion device 24 is further installed with a driving means which selectively transfers >=2 nozzles to a common weft insertion position. One of the nozzles 22a-22b of the first weft insertion means 24 placed at the common weft insertion position is transferred to another position and the other one of weft insertion nozzles 22a-22b is instead transferred to the common weft insertion position. Thus, the opening amount for warp yarns or the amount of the reed stroke and the moving amount of the weft insertion nozzles 22a-22b can be made small.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weft insertion device for a multicolor weft insertion of a fluid jet loom having three or more weft insertion nozzles.

[0002]

2. Description of the Related Art As a multicolor weft insertion device having three or more weft insertion nozzles, for example, those shown in FIGS. 8 and 9 are conventionally known. 8 and 9 each show, as an example, a four-color weft insertion device having four weft insertion nozzles.

[0003] The apparatus shown in FIG.
(Nozzles denoted by reference numerals 1, 2, 3 and 4)
2 is a nozzle fixed type multi-color weft insertion device which is arranged in parallel on the second and performs weft insertion with each position as a weft insertion position.

An apparatus shown in FIG. 9 is disclosed in Japanese Patent Application Laid-Open No. 49-4167.
No. 1 proposes that a plurality of weft insertion nozzles 10 can be angularly rotated around a predetermined center point P, and the weft insertion nozzles 10 are driven by a common weft using driving means. This is a nozzle moving type multi-color weft insertion device that selectively moves to the insertion position (the position of the nozzle indicated by reference numeral 2) to perform weft insertion.

According to the configuration of the apparatus shown in FIG.
Since the region where 0 exists extends in the swing direction of the reed 14, the stroke (swing angle) of the reed 14 must be increased in weaving. In addition, in order to make the stroke of the reed 14 slightly smaller, the weft insertion nozzle 10 is
When it is arranged close to 6, the opening amount of the warp 18 (opening angle of the opening) must be increased, and accordingly, the stroke of the heald frame (the amount of vertical movement) must be increased. Increasing the stroke of the reed or heald frame in this manner hinders speeding up of the loom.

According to the configuration of the apparatus shown in FIG. 9, the weft insertion device is increased in size in proportion to the number of weft insertion nozzles, and the amount of movement of the weft insertion nozzle at the time of switching is increased. As a result, the inertia associated with the switching motion increases, and the weft insertion nozzle overshoots (a phenomenon of oscillating back and forth with respect to the target weft insertion position) at the time of switching, making the weft insertion unstable and changing the position of the weft insertion. Responsiveness deteriorates. In addition, the load applied to the driving means for the weft insertion nozzle increases, which causes early damage to the driving means. Furthermore, they all hinder the speeding up of the loom.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a multicolor weft insertion device having three or more weft insertion nozzles. An object of the present invention is to enable a high-speed loom.

[0008]

A multicolor weft insertion device according to the present invention comprises: a first weft insertion means having two or more weft insertion nozzles;
And a second weft insertion means having one or more weft insertion nozzles. At least the first weft insertion means further includes a drive means for selectively displacing two or more weft insertion nozzles to a common weft insertion position.

The first weft insertion means performs weft insertion by selectively moving two or more weft insertion nozzles to a common weft insertion position. In other words, the first weft insertion means includes: Only one of the two or more weft insertion nozzles is moved to the common weft insertion position. This makes it possible to reduce the area in which the weft insertion nozzle is present, as compared with a conventional nozzle fixed type multicolor weft insertion device.

[0010] The first weft insertion means is movably provided with only the weft insertion nozzle excluding one or more weft insertion nozzles included in the second weft insertion means. As a result, the mechanism for moving the weft insertion nozzle can be reduced in size, the inertia associated with the movement of the weft insertion nozzle can be reduced, and the weft insertion nozzle can be reduced compared to the conventional nozzle moving type multicolor weft insertion device. The moving amount can be reduced.

As a result, the stroke of the reed and the shedding amount of the warp can be reduced. In addition, the weft insertion can be stabilized, the load on the driving means can be reduced, and the responsiveness of nozzle switching can be improved. As a result, the speed of the loom can be increased.

Further, first pressure fluid supply means for supplying a weft insertion pressure fluid to the weft insertion nozzle of the first weft insertion means and weft insertion pressure fluid for the second weft insertion means. Second pressure fluid supply means for supplying to the nozzle. Thereby, it becomes possible to select a plurality of types of the same weft insertion for inserting two wefts into the same opening at the same time.

The first weft insertion means includes a swing shaft supported by the frame of the loom so as to be capable of angular reciprocating rotation, and simultaneously swings with the angular reciprocating rotation of the swing shaft. A swing arm mounted on the swing shaft, the swing arm supporting the weft insertion nozzle, and the drive shaft can reciprocally rotate the swing shaft angularly.

[0014] The second weft insertion means may include two or more weft insertion nozzles. In this case, the second weft insertion means may include a driving means for selectively displacing the two or more weft insertion nozzles to a different weft insertion position different from the common weft insertion position of the first weft insertion means. it can.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 to 4, a multicolor weft insertion device 20 ejects a weft yarn together with a pressurized fluid.
The two weft insertion nozzles 22a, 22b, 22c, 22d are divided into two sets, that is, weft insertion means 24, 26, and these weft insertion nozzles are arranged in contrast to the frame 28 of the loom (see FIG. 2). . The multicolor weft insertion device 20 can be applied to a water jet loom as a four-color weft insertion device.

The weft insertion means 24 and 26 are provided in addition to the weft insertion nozzles 22a and 22b and 22c and 22d, respectively.
Oscillating shafts 30 and 32 supported by the frame 28 so as to be capable of angular reciprocating rotation, and holding members or oscillating arms 34a, 34b, 34c,
34d. In FIG. 1, the weft insertion nozzles 22b and 22c are omitted, and a part of the swing arms 34b and 34c is indicated by broken lines.

The swing shafts 30 and 32 are received by the pair of bearing portions 36a, 36b and 38a, 38b so as to extend in parallel with the frame 28. In the illustrated example, as shown in FIG. 4, the rotation axes 40 and 42 of the swing shafts 30 and 32 are spaced on the warp line 12. However, the rotation axes 40 and 42 may be located other than on the warp line 12.

The swing arms 34a, 34b, 34c and 3
4d are split tightening screws 44a, 44b, 44, respectively.
c and 44d are non-rotatably mounted on the corresponding oscillating shafts 30, 32, and the corresponding oscillating shafts 30, 3
The nuts 46 and 48 screwed into the nut 2 press the corresponding bearings 36a and 38a.

The swing arms 34a, 34b, 34c and 3
4d is a convex spherical fitting member 50a, 50, respectively.
b, 50c, and 50d and concave spherical bushings 52a, 5b
The corresponding swing shaft 3 via 2b, 52c and 52d
0,32. Swing arms 34a and 34
b and spacers 54a and 54b are respectively arranged between the swing arms 34c and 34d.

As shown in FIGS. 3 and 4, the swing arm 3
4a, 34b and the oscillating arms 34c, 34d respectively include the weft insertion nozzles 22a, 22b and 22c,
22d is held on the corresponding swing shafts 30 and 32 at a predetermined angular interval around the rotation axes 40 and 42.

Bearings 36a, 36b, 38a, 38c
As shown in cross section in FIG. 1, one of the brackets 38 b is mounted on the frame 28, and the corresponding swing shaft is rotatably disposed at one end of the bracket 56 so as not to move. Bearing 58 and bracket 56
And a nipple 60 inserted from the other end side.

As shown in FIG. 1, one set of the bearing portion, the swing shaft and the swing arm is formed with a flow path 62 for supplying a pressure fluid to a corresponding weft insertion nozzle. The passage portion of each swing shaft is a blind hole that opens at the end of the swing shaft, and the opening of the blind hole is closed by a screw 63.

The pipes 66a, 66b, 66c and 66d extending from the pressure fluid supply device 64 shown in FIG. 5 correspond to the corresponding bearing portions 36a, 36b, 38a and 38b, respectively.
Nuts 68a, 68b, 68c and 68d
Are connected by

The multicolor weft insertion device 20 further includes two driving mechanisms 70 and 72. The driving mechanisms 70 and 72
They correspond to the first and second weft insertion means 24 and 26, respectively, and rotate the pivot axes 30 and 32 of the corresponding weft insertion means 24 and 26 angularly. In addition, FIG.
Some of these driving mechanisms 70 and 72 are omitted.

The drive mechanisms 70 and 72 are each a drive source 7 which is a rotary electric actuator such as a servomotor.
4 and 76; cranks 78 and 80 connected to the output shaft of the drive source by split screws; links 82 and 84 pivotally connected to the crank at one end by bolts and nuts; Swinging levers 86 and 88, which are pivotally connected to each other at the other end by bolts and nuts. Each swing lever is connected to a corresponding swing shaft by a split screw.

The swing levers 86, 88 are connected to the crank 78,
When the connection point between the link 80 and the links 82 and 84 reaches the top dead center or the bottom dead center, the weft insertion nozzle is fixed to the swing shafts 30 and 32 so as to reach a predetermined position. Therefore, when the output shafts of the driving sources 70 and 72 are rotated by half in one direction,
The swing levers 86, 88, the swing shafts 30, 32, and the swing arms 34a, 34b, 34c, 34d are rotated in one direction by a predetermined angle. When the output shafts of the drive sources 70 and 72 are further rotated by half in the same direction, the swing levers 86 and 88, the swing shafts 30 and 32, the swing arms 34a, 34b, 34c,
34d is rotated by a predetermined angle in the reverse direction, and the weft insertion nozzle is switched. The output shafts of the drive sources 74 and 76 may be controlled not only in one direction but also in such a manner that the output shafts repeat forward and reverse rotation.

In the state shown in FIGS. 2, 3 and 4, the weft insertion nozzles 22a and 22d have been moved to a predetermined weft insertion position. The single weft insertion position shared by the weft insertion nozzles 22a and 22b is the position of the weft insertion nozzle 22a shown in the figure, and the single weft insertion position shared by the weft insertion nozzles 22c and 22d is the weft shown in the figure. This is the position of the input nozzle 22d.

In the state shown in FIG.
Is used for weft insertion, the swing shaft 30 and the swing arm 3
4a and 34b are rotated by a predetermined angle by the drive mechanism 70. Thereby, the weft insertion nozzle 22b is moved to the common weft insertion position, and the weft insertion nozzle 22a is separated from the common weft insertion position.

In the above state, when the weft insertion nozzle 22a is used for weft insertion, the swing shaft 30 and the swing arm 34 are used.
a and 34b are reversed by the first drive mechanism 70 by a predetermined angle. Thereby, the weft insertion nozzle 22a is moved to the common weft insertion position, and the weft insertion nozzle 22b is separated from the common weft insertion position.

Similarly, when the weft insertion nozzle 22c is used for weft insertion in the state shown in the figure, the swing shaft 32 and the swing arms 34c and 34d are rotated by a predetermined angle by the second drive mechanism 72. Thereby, the weft insertion nozzle 22c is moved to the common weft insertion position, and the weft insertion nozzle 22d is separated from the common weft insertion position.

In the above state, the weft insertion nozzle 22
When d is used for weft insertion, the swing shaft 32 and the swing arms 34c and 34d are reversed by a predetermined angle by the second drive mechanism 72. Thereby, the weft insertion nozzle 22d is returned to the common weft insertion position, and the weft insertion nozzle 22c is separated from the common weft insertion position.

As described above, the weft insertion nozzle used for weft insertion is switched and appropriately selected. Weft insertion nozzle 22a,
The weft insertion of two types of wefts may be simultaneously performed by using one of the weft insertion nozzles 22c and 22d simultaneously.

Referring to FIG. 5, the pressure fluid supply device 64
Pumps the water in the constant water level tank 90 to the first pump 92 and the second pump 92.
Are supplied as high-pressure water (pressure fluid) for weft insertion to the first change valve 96 and the second change valve 98, respectively. The first pump 92 and the second pump 94 are operated continuously during weaving.

The first change valve 96 is for switching the flow path of the pressure fluid to the flow path 100 or 102, and the second change valve 98 is for switching the flow path of the pressure fluid to the flow path 104 or 102. It is for switching to 106. Therefore, the pressure fluid supplied from the first pump 92 and the second pump 94 is returned to the constant level tank 90 through the flow path 100 and the flow path 102, or is returned through the flow paths 104 and 106. To the third and fourth change valves 108 and 110.

The third change valve 108 is for switching the flow path of the pressure fluid to the pipe 66a or the pipe 66b, and the fourth change valve 110 is for switching the flow path of the pressure fluid to the pressure path. Fluid pipe 66
c or to switch to pipe 66d.
Therefore, the pressure fluid from the third change valve 108 is supplied to the weft insertion nozzle 22a or 22b through the pipe 66a or 66b, and the pressure fluid from the fourth change valve 110 is supplied to the pipe 66c. Alternatively, it is supplied to the weft insertion nozzle 22c or the weft insertion nozzle 22d via the pipe 66d.

When the weft insertion nozzle 22a is used for weft insertion,
The pressure fluid from the pump 92 is supplied to the change valves 96, 10
The pressure fluid is supplied to the weft insertion nozzle 22a via the pipe 8 and the pipe 66a, and the pressure fluid from the pump 94 is returned to the tank 90 from the flow path 102 via the change valve 98.

Similarly, when the weft insertion nozzle 22b is used for weft insertion, the pressure fluid from the pump 92 is applied to the change valve 9
6,108 and the weft insertion nozzle 22b through the pipe 66b
And the pressure fluid from the pump 94 is returned to the tank 90 through the flow path 102.

When the weft insertion nozzle 22c or 22d is used for weft insertion, the pressure fluid from the pump 94 is supplied to the pipe 66c or 66d by the change valves 98 and 110.
Is supplied to the weft insertion nozzle 22c or 66d.
During this time, the pressure fluid from the pump 92 is supplied to the change valve 9.
6 and is returned to the tank 90 from the flow path 100.

Either one of the weft insertion nozzles 22a and 22b
When one of the weft insertion nozzles 22c and 22d is used for weft insertion at the same time, the pressure fluid from the pumps 92 and 94 is supplied to the change valves 96, 108 and 98,
110, the pipe 66a or 66b and the pipe 6
6c or 66d, the weft insertion nozzle 22a or 2d.
2b and 22c or 22d.

As in the above-described pressure fluid supply device 64, pumps 92 and 94 as pressure fluid sources are connected to the weft insertion means 24,
When the two weft insertion nozzles are used for weft insertion at the same time, the pressure of the pressure fluid ejected from the weft insertion nozzle does not decrease compared to the case where the pressure fluid source is common to the weft insertion means 24 and 26. It is possible to perform stable simultaneous weft insertion (same weft insertion) at a pressure suitable for the weft for each of the weft insertion means 24 and 26, and moreover, a plurality of types (in this embodiment, depending on the combination of selection of the weft insertion nozzle). (4 types). However, the pressure fluid source is connected to both weft insertion means 24, 26.
May be used in common.

According to the above-described weft insertion device 20, the opening amount of the warp (opening angle of the opening) or the stroke of the reed (the swing angle) can be made smaller than that of a conventional multi-color weft insertion device of a fixed nozzle type. In addition, the moving amount of the weft insertion nozzle can be reduced as compared with a conventional nozzle moving type multicolor weft insertion device. As a result, the inertia associated with the movement of the weft insertion nozzle is reduced, the load on the drive mechanisms 70 and 72 is reduced, the weft insertion is stabilized, and the speed of the upper loom can be increased.

In the above embodiment, the weft inserting means 24 and 2
6, each of which has two weft insertion nozzles and enables switching of the weft insertion nozzle used for weft insertion.

However, as shown in FIG. 6, one weft insertion nozzle 22a is provided in one weft insertion means 24, the position of the nozzle is fixed on the warp line 12, and the other weft insertion means 26 is provided in the other weft insertion means 26. Two weft insertion nozzles 22b, 22
c and 22d may be provided, and the arrangement positions of those nozzles may be changed.

Further, as shown in FIG.
, 26 are provided with a plurality of weft insertion nozzles, the arrangement of the weft insertion nozzles 22a, 22b of one weft insertion means 24 is fixed on the warp line 12, and the other weft insertion means 26 is provided.
The arrangement position of the weft insertion nozzles 22c and 22d may be changed.

In the above embodiment, the weft insertion nozzle is moved by the crank mechanism, but the weft insertion nozzle may be moved by the cam mechanism. Further, in each embodiment, the weft insertion nozzle is moved by swinging, but the weft insertion nozzle is linearly moved using a linear movement mechanism such as a rack and pinion mechanism, a linear motor, a solenoid mechanism, and the like. Is also good.

The present invention can be applied not only to the four-color weft insertion device as in the above embodiment, but also to three-color or five-color or more weft insertion devices. For example, in the case of a three-color weft insertion device, one of the two weft insertion means has two weft insertion nozzles movable with respect to a common weft insertion position, and the other has a weft insertion nozzle fixed at the weft insertion position. Can be. Also, 5
In the case of color or more, one of the weft insertion means may include two or more weft insertion nozzles that can be selectively moved to a common weft insertion position, and the weft insertion nozzle of the other weft insertion means may be fixed. , May be selectively movable to another common weft insertion position.

The present invention can be applied not only to a multicolor weft insertion device for a water jet loom but also to a multicolor weft insertion device for an air jet loom. In this case, the constant water level tank, the pump and the change valve in the above embodiment can be replaced with an air tank and an air valve.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a multicolor weft insertion device of the present invention, with some members omitted.

FIG. 2 is a front view of the multicolor weft insertion device shown in FIG. 1, with some members omitted.

FIG. 3 is a sectional view showing the vicinity of weft insertion means in the multicolor weft insertion device shown in FIG. 1;

FIG. 4 is a view showing one embodiment of a positional relationship between a weft insertion nozzle and an opening.

FIG. 5 is a circuit diagram of a flow path showing one embodiment of a pressure fluid supply device.

FIG. 6 is a diagram showing another embodiment of the positional relationship between the weft insertion nozzle and the opening.

FIG. 7 is a diagram showing still another embodiment of the positional relationship between the weft insertion nozzle and the opening.

FIG. 8 is a view showing one embodiment of a positional relationship between a weft insertion nozzle and an opening in a conventional weft insertion device.

FIG. 9 is a view showing another embodiment of the positional relationship between the weft insertion nozzle and the opening in the conventional weft insertion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Warp line 18 Warp 20 Multicolor weft insertion device 22a-22d Weft insertion nozzle 24,26 Weft insertion means 28 Loom frame 30,32 Swing axis 34a-34d Swing arm 36a, 36b, 38c, 38d Bearing part 40, 42 Center of swing

Claims (2)

[Claims] 1. A first weft insertion means having two or more weft insertion nozzles and a second weft insertion means having one or more weft insertion nozzles, wherein at least the first weft insertion means further comprises: And a driving means for selectively displacing the two or more weft insertion nozzles to a common weft insertion position. 2. The method according to claim 1, further comprising the step of:
A first pressure fluid supply means for supplying a weft insertion nozzle to the weft insertion nozzle of the second weft insertion means, and a second pressure fluid supply means for supplying a pressure fluid for weft insertion to the weft insertion nozzle of the second weft insertion means. Including, multicolor weft insertion device.