JPS61179344A - Wefting apparatus in fluid jet type loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) The present invention selectively inserts a plurality of weft yarns supplied from a plurality of weft yarn supply sources using a jet fluid according to a weft insertion pattern. It relates to a device for.

(Prior Art) In a fluid jet loom that injects weft yarns from a main nozzle for weft insertion into a warp opening, multiple weft yarns supplied from multiple weft supply sources are selectively input according to a weft insertion pattern. As a method for selective weft insertion, there is a method in which a plurality of weft insertion main nozzles that eject each weft yarn are switched to the weft insertion position. One of the specific drive mechanisms is a cam mechanism equipped with a cam that rotates in synchronization with the rotation of the machine base, and is used as a weft insertion device that selectively switches and arranges multiple main nozzles for weft insertion. A relatively simple configuration is possible. However, as the number of main nozzles for weft insertion increases, the profile of the cam inevitably becomes complicated.
It is difficult to increase the number of main nozzles for weft insertion, and the weft insertion pattern is limited to one for each cam, making it impossible to freely select the weft insertion pattern without replacing the cam.

An example of a weft insertion device that made it possible to freely select a weft insertion pattern without replacing the cam was disclosed in Japanese Patent Application Laid-Open No. 59-4314.
It is disclosed in Publication No. 8. In this conventional device, the 9th and 1st
As shown in Figure 0, a first electromagnetic solenoid 3 is attached to a cam lever 2 that constantly swings as the cam 1 rotates. The drive pin 3a engages with a transmission lever 7 that is operatively connected to an exchange lever 6 that supports the pair of main nozzles 4 and 5 so that they can be placed in the weft insertion position, and the transmission lever 7 is moved up and down to move the exchange lever 6.
is swung, and the pair of main nozzles 4 and 5 are switched to the weft insertion position. Further, a second electromagnetic solenoid 8 is disposed on the side of the swing locus of the exchange lever 6, and when the solenoid pin 8a is protruded according to the weft selection program, when the transmission lever 7 is moved upward. It engages with the exchange lever 6 and holds one main nozzle in the weft insertion position. That is, by combining the excitation and demagnetization of both electromagnetic solenoids 3.8, the pair of main nozzles can be freely switched and arranged, and the weft selection program can be freely set.

(Problems to be Solved by the Invention) However, this conventional device requires many rotating levers in order to convert the rotation of the cam into a switching arrangement movement of the main nozzle, and furthermore, in such a mechanism, Since it is difficult to attach the main nozzle to the main nozzle, it is necessary to swing the exchange lever 6 in synchronization with the slide, which inevitably complicates the configuration. In addition, as the number of main nozzles increases, the structure becomes more complex and the profile of the cam becomes more complex, making it difficult to selectively insert a large number of weft yarns, and in high-speed looms such as fluid-jet looms, it is difficult to follow. There are also problems with sexuality.

Structure of the Invention (Means for Solving the Problems) In order to solve the above problems, in the present invention, a plurality of weft insertion main nozzles are arranged and supported by main nozzle supporting means, and each of the weft insertion main nozzles The main nozzle support means is attached to the slay or the swinging member so that it can move reciprocatingly linearly or rotatably so that the weft inserting main nozzles can pass through the weft inserting position in the direction in which the weft inserters are arranged. A cam body having a cam surface for selectively switching and arranging it to the inserted position is disposed in the swinging direction of the slay or the swinging member, and the cam body is driven by a reciprocating drive device such as an air cylinder or an electromagnetic solenoid. operation is connected to the
By driving the drive device according to the weft insertion pattern, the cam body is switched and arranged, and the engagement between the main nozzle support means and the cam surface is switched.

(Function) That is, when the main nozzle support means supporting a plurality of weft inserting main nozzles is swinging integrally with the sley in the swing direction of the sley, the support means and the first cam of the cam body Due to the engagement with the surface, the first weft inserting main nozzle out of the plurality of weft inserting main nozzles is selectively arranged at the weft inserting position.

According to the weft insertion pattern, the reciprocating drive device is operated near the beating time, and the cam body is moved so that a second cam surface different from the cam surface is switched to a position of engagement with the main nozzle support means. .

When the main nozzle support means retreats together with the slay following the beating operation, the engagement between the support means and the second cam surface causes the second weft inserting main nozzle to separate from the first weft insertion main nozzle.
The main nozzle for weft insertion is switched to the weft insertion position. Therefore, the main nozzle for weft insertion can be switched to the weft insertion degree position simply by moving the cam body and selectively arranging the cam surface to the engagement position with the main nozzle support means, which is relatively Despite the simple configuration, the weft insertion pattern can be freely selected.

(Example) Hereinafter, an example embodying the present invention will be described based on FIGS. 1 to 4.

Two weft yarns Yl are supplied from a pair of weft supply sources (not shown) on the upper surface of one end side (weft insertion side) of the slay 11, which is reeded and swung around a rocking shaft (not shown).
, Y2, respectively, a pair of weft insertion main nozzles 12A.

12B is mounted so as to be movable up and down, and can pass through the front position of the weft guide path S formed on the front surface of the reed 13 erected on the sleigh 11, that is, the weft insertion position. The main nozzles 12A and 12B for inserting both wefts are housed in a vertically stacked manner in the housing cover 14.
A guide rod 15 connected and suspended from the lower surface of Slay 1
1 is slidably penetrated and supported downward from the upper surface.

An angled support piece 16 is fixed to the lower end of the rod 15, and a pressure spring 17 is interposed between the support piece 16 and the lower surface of the slay 11.

That is, the accommodation cover 14, the guide rod 15, the support piece 16, and the pressure spring 17 constitute a main nozzle support means, and the main nozzles 12A and 12B for weft insertion are always pressed downward by the action of the pressure spring 17. has been done. A rotor 18 is supported rotatably in the swinging direction of the sley 11 inside the support piece 16 constituting the main nozzle support means. Note that a stopper 19 is fixed to the guide rod 15 directly below the housing cover 14 .

A cam body 20 that spans the swinging range of the sley 11 is supported by a pair of support bars 21 and 22 so as to be slidable in the longitudinal direction of the sley 11 below the end of the sley 11 where the main nozzle for weft insertion is attached. A pair of cam surfaces 20a have a step on the upper surface and are flush with each other on the front side of the woven fabric W.

20b is formed. One cam surface 20a is formed in a circular arc surface centered on the rocking shaft (not shown), and the other cam surface 20b is formed in a circular arc surface centered on the rocking shaft on the retreating side of the sley 11, that is, on the left side in FIG. The cam surface 20a is formed on the cam surface 20a at the end of the woven fabric W on the front side. An air cylinder 23 is installed on the side of the cam body 20 to
The drive rod 23a thereof is connected and fixed to the side surface of the cam body 20. Same cylinder 2
3 is a pair of supply pipes 24.25 and a solenoid valve 26.
The drive rod 2 is connected to a compressed air supply source (not shown) via the valve 27, and the driving rod 2 is
3a is now appearing. Both solenoid valves 26
．． Reference numeral 27 is a three-way valve blade type equipped with an exhaust boat, and when the valve is opened, the exhaust boat is closed, and when the valve is closed, the exhaust boat is opened.

That is, when the electromagnetic valve 26 is open and the electromagnetic valve 27 is closed, the drive rod 23a is in a protruding state, and when the electromagnetic valve 27 is open and the electromagnetic valve 26 is closed, the drive rod 23a is in a protruding state. is in a state of immersion.

The operation of both electromagnetic valves 26 and 27 is controlled based on an operation command from a control device (not shown) according to a preset weft insertion pattern, and the operation timing is set around the beating time. The main nozzle support means can engage with the cam surfaces 20a and 20b via the rotor 18, and when the drive rod 23a is in the protruding state, the cam surface 20a is located directly below the swinging trajectory of the rotor 18. As shown in FIGS. 1 and 3, the rotor 18 is placed in
Due to this action, the main weft insertion nozzle 12A is pressed onto the cam surface 20a and held at the weft insertion position. Furthermore, when the drive rod 23a is in the retracted state, the cam surface 20b is placed directly below the swinging trajectory of the rotor 18, and as shown in FIG.
The weft insertion main nozzle 12B is pressed upward and held at the weft insertion position.

Now, as shown in FIGS. 1 and 3, the sley 11 is in the most retracted position, and the rotor 18 is pressed against the cam surface 20a. In this state, the main weft insertion nozzle 12A is disposed at the weft insertion position in front of the weft guide path S, and the weft Y1 is ejected and inserted into the weft guide path S from the main nozzle 12A. As the Slay 11 moves forward, the rotor 18 moves on the cam surface 20a.
0a is formed in an arcuate surface centered on the swing center (i.e., the rocking shaft) of the sley 11, so there is no vertical movement of the rotor 18, and the main nozzle 12A for weft insertion remains at the weft insertion position until the beating time. Placement is maintained.

As shown by the chain line in Fig. 3.4, when the solenoid valve 27 is opened according to the weft insertion pattern near the reeding point when the sley 11 has advanced the most, and when the solenoid valve 26 is closed, the cam body 20 is It is moved to the cylinder 23 side, and the cam surface 20b is switched and placed directly below the swinging trajectory of the rotor 18.

As a result, when the sley 11 retreats from the weaving area after beating is completed, the rotor 18 moves on the cam surface 2Ob, and the main nozzle support means is moved upward against the action of the pressure spring 17.
As shown in FIGS. 2 and 4, the weft insertion main nozzle 12B is switched to the weft insertion position. Then, the main weft insertion nozzle 12B is operated in synchronization with the weft insertion timing, and the weft Y2 is injected into the weft guide path S.

In this way, the pair of weft insertion main nozzles 12A, 12
To selectively switch and arrange B to the weft insertion position, it is only necessary to electrically control the opening and closing operations of the electromagnetic valves 26 and 27 according to a preset weft insertion pattern. Change the order appropriately and set both wefts Y1. The weft insertion order (weft insertion pattern) of Y2 can be freely selected. Moreover, since the cam body 20 is disposed in the direction of the swinging force of the Sley 11 over its swing locus, a main nozzle supporting means that can engage with the cam surface of the cam body 20 is provided on the Sley 11 side for weft insertion. Nozzle 1
2A and 12B can be supported and installed side by side, and in order to direct the weft insertion main nozzle to the swinging weft insertion position as in the case of the conventional device, the slay 11
There is no need to oscillate the main nozzle in synchronization with the oscillating movement of the weft, and the weft can be reliably ejected and inserted into the weft guide path S.

Further, in order to switch and arrange the weft insertion main nozzles 12A and 12B to the weft insertion position, the cam body 2° is moved and the respective cam surfaces 20a and 20b are switched and arranged to the engagement position with the main nozzle support means. However, since the moving distance is relatively short and the weight of the cam body 20 can be easily reduced, the moving operation of the cam body 20 can be made faster, and it can sufficiently follow high-speed looms such as fluid jet looms. can be done.

The present invention is, of course, not limited to the above-mentioned embodiments, but also includes embodiments shown in FIGS. 5 to 8, for example.

In the embodiment shown in FIG. 5, a cam body 28 having only one cam surface 28a is used, and when the rotor 18 is in contact with the cam surface 28a, the main nozzle for weft insertion 12B is used during the weft insertion period. is switched to the weft insertion position, and when the rotor 18 is not in contact with the cam surface 28a, the stopper 19 fixed to the guide rod 15 comes into contact with the upper surface of the slay 11, and the other main nozzle for weft insertion 12A
is placed at the weft insertion position. The switching arrangement of the weft inserting main nozzles 12A, 12B is carried out near the beating time shown by the dashed line in FIG. 5, as in the previous embodiment.

This method of switching the main weft insertion nozzles using a cam body having one cam surface less than the number of weft insertion main nozzles used is when three or more weft insertion main nozzles are used. It is also possible to

In the embodiment shown in FIG. 6, three weft yarns Y1. Y2゜Y3
Three weft insertion main nozzles 12A are used to insert the weft.
, 12B, and 12G are vertically arranged and supported by the same main nozzle support means as in the previous embodiment, and a cam body 29 having three cam surfaces 29a, 29b, and 29c is used. The amount of protrusion of the drive rod 23a of the air cylinder 23 that drives the cam body 29 must be controlled in two stages, and when the middle weft insertion main nozzle 12B is switched to the weft insertion position, the drive rod 23a must be controlled. It is necessary to open or close both electromagnetic valves 26 and 27 while projecting to the intermediate position.

In the embodiment shown in FIG. 7, a pair of weft insertion main nozzles 1
A rod 30 is connected and suspended from the lower surface of the housing cover 14 that accommodates the 2A and 12B stacked one above the other. A rotor 31 is supported at the lower end of the rotor 31 so as to be rotatable in the horizontal direction. And Slay 1
A cam body 32 having a pair of cam surfaces 32a and 32b on the side surface is supported by a pair of support bars 21 and 22 so as to be slidable in the vertical direction, and is supported by an air cylinder 23 below the side where the main nozzle for weft insertion is attached. It is possible to move up and down. When the cam body 32 is moved downward as shown in the drawing, the rotor 31 is pressed against the upper cam surface 32a by the action of the tension spring 33, and the main nozzle for weft insertion 12
A is switched to the weft insertion position. Cam body 32
When the rotor 31 is moved upward, the rotor 31 moves toward the lower cam surface 3.
2b, and the weft insertion main nozzle 12B is switched to the weft insertion position. The cam surface 32b is made of woven fabric W
The cam body 32 is connected to the cam surface 32a on the front side of the fabric, and the cam body 32 moves up and down when the rotor 31 is located at the same position.

Note that the operation of the air cylinder 23 is controlled by a pair of electromagnetic valves (paths shown) as in each of the embodiments described above.

In the embodiment shown in FIG. 8, a pair of weft insertion main nozzles 1
A rod 34 connected and suspended from the lower surface of the housing cover 14 that accommodates the 2A and 12B is erected and supported on the sleigh 11 so as to be rotatable in the direction of the surface thereof, and a latching arm protrudes from the side thereof. A tension spring 38 is suspended between 34a and the sley 11.

A transmission lever 35 is attached to the front surface of the sleigh 11 so as to be rotatable about a shaft 36, and the locking arm 34a is fitted into an elongated hole 35a formed in the upper part of the transmission lever 35. A rotor 37 rotatably supported in the horizontal direction at the lower end of the transmission lever 35 is connected to a cam body 3 similar to that shown in FIG.
It is possible to come into contact with the cam surfaces 32a and 3'lb of No.2.

゛In this embodiment, the cam surfaces 32a, 32b and the rotor 3
When the contact with shaft 3 is switched, the transmission lever 35
The main nozzle 12 for weft insertion is rotated left and right around 6.
A and 12B are rotated about the rod 34 and switched to the weft insertion position.

Further, in the present invention, the number of main nozzles for weft insertion can be increased in each of the above embodiments, and an electromagnetic solenoid can also be used as a drive mechanism for moving the cam body. In each of the embodiments described above, the timing of the movement of the cam body was set near the beating time, but it is also possible to set the timing to move the cam body at any time other than the weft insertion period as long as it does not affect the weft insertion.

Furthermore, in the present invention, a main nozzle for weft insertion is attached to a swinging member that synchronizes with the swinging motion of the slay, or a weft guide path is formed by a row of many weft guide members instead of the reed in each of the above embodiments. It is also possible to embody it in a loom.

Effects of the Invention As detailed above, the weft insertion device of the present invention allows the weft insertion pattern to be freely selected despite its relatively simple configuration.
It has the excellent effect of being able to follow subordinates even when driving at high speeds.

[Brief explanation of the drawing]

1 to 4 show one embodiment embodying the present invention, and the first
The figure is a perspective view of the main parts, FIG. 2 is a perspective view of the main parts showing changes from FIG. 1, FIG. 3 is a side view corresponding to FIG. 1, FIG. 4 is a side view corresponding to FIG. 2, FIG. 5 is a side view showing another example of the present invention, FIGS. 6 to 8 are perspective views showing another example, FIG.
10 are side views showing the operation of the conventional device. Slay 11, main nozzles for weft insertion 12A, 12B, 1
2C, accommodation cover 14 constituting main nozzle support means
, the same guide rod 15, the same support piece 16, the same pressure spring 17, the cam body 20° 28, 29, 32, the cam surfaces 20 a, 20 b, 28 a, 29 a, 29 b
, 29c, 32a, 32b. Air cylinder 23 as reciprocating drive means, weft yarns Y1, Y
2. Y3゜

Claims (1)

[Claims] 1. In a fluid injection loom that performs weft insertion by injecting the weft into the warp opening from a weft insertion main nozzle attached to the slay or a swinging member that swings in synchronization with the movement of the weft,
A plurality of weft insertion main nozzles are arranged and supported by main nozzle support means, and the main nozzle support means are attached to the slay or the swinging member so that each of the weft insertion main nozzles can pass through the weft insertion position. A cam body having a cam surface for selectively switching and arranging each of the weft insertion main nozzles to the weft insertion position is disposed in the swinging direction of the slay or the swinging member, and the main nozzle A weft insertion device for a fluid jet loom, wherein the cam body is operatively connected to a reciprocating drive device so that engagement between the support means and the cam surface can be switched.