JP2969681B2 - Tack-in method and apparatus in shuttleless loom - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tuck-in method and apparatus in a shuttleless loom.

2. Description of the Related Art A reciprocating and reciprocating and reciprocating needle and a yarn arranging air jet nozzle for arranging a weft end in a tuck-in action area of the needle cooperate with a warp tip of a reed. Tuck-in device that pulls into the opening
No. 8182, JP-A-60-71741, JP-A-62-53448, JP-A-63-30380 and JP-A-63-106783. JP-B-61-8182 and JP-A-sho
Japanese Patent Application Laid-Open No. Sho 62-53448 discloses a device in which the weft end is bent and gripped by one of a pair of air nozzles and arranged in the tuck-in action region of the needle by the other. In the apparatus disclosed in Japanese Utility Model Laid-Open No. 63-30380 and Japanese Utility Model Laid-Open No. 63-106783, a configuration is adopted in which the weft end is gripped by a single air nozzle and arranged in the tuck-in action area of the needle. In this case, the supply of pressurized air to the air nozzle is performed via a mechanical valve or an electromagnetic valve that opens and closes in synchronization with the weft insertion cycle.

[Problems to be Solved by the Invention] In order to accurately grasp the weft end by the air nozzle and arrange the needle in the tack-in action area, the injection timing from the air nozzle must be accurately set to the timing of the needle entering the warp opening. Must be done synchronously,
In particular, extremely high precision is required in setting the switching timing of the injection timing of a pair of air nozzles that separately handle the gripping of the weft end and the placement in the tack-in action area. If an injection valve that requires such high precision is to be set using an electromagnetic valve, it is necessary to adjust the timing in consideration of the response delay, which is a drawback of the electromagnetic valve, but such adjustment is extremely complicated. is there.

Therefore, if a mechanical valve having no response delay is used, the complicated adjustment as described above becomes unnecessary, but it is impossible to cope with a case where it is desired to change the injection timing.

Therefore, the injection timing needs to be changed, for example, when it is desired to avoid a tuck-in operation when a weft insertion error occurs. In other words, if a weft insertion error occurs such that the leading end of the weft inserted weft does not reach the position where the weft detector is installed, and the end of the inserted weft is tacked in, weft insertion failure Nevertheless, the end of the weft that has been misinserted is woven into the woven fabric, which hinders the removal of the defective weft from the cloth.

The basic idea of the present invention is to prevent the tuck-in of the weft-insertion error when a weft-insertion error occurs, and to complete the tuck-in except when the weft-insertion error occurs. It is an object of the present invention to provide a tuck-in method and apparatus which depends on an electromagnetic valve only when a timing change is necessary.

[Means for Solving the Problems] For this reason, in the present invention, an electromagnetic valve that controls the supply of pressurized air to a yarn arranging air injection device for arranging a weft end portion in a tuck-in action area of a needle causes a weft insertion error. At times, the electromagnetic valve is closed to stop the operation of the yarn arranging air injection device, thereby preventing the weft from being tucked-in when the weft insertion error has occurred. Then, the operation of the yarn arranging air injection device is continued to complete the tack-in of the weft. In the second invention, a mechanical valve that opens and closes in synchronization with the weft insertion cycle of the loom is interposed in series with the electromagnetic valve.

[Operation] The injection timing of the yarn arranging air injection device during the normal operation is always constant in synchronization with the timing at which the needle enters the warp shedding, and there is no response delay in the repetition of such a constant cycle of the tuck-in operation. The pressure air supply control by a mechanical valve is reliable and advantageous.
In addition, it is necessary to change the injection timing in the yarn arranging air injection device for preventing the tuck-in operation when the weft insertion error occurs, depending on the electromagnetic valve. The closed state prevents the needle from being arranged in the tack-in action area. As a result, the weft end is not tacked in by the tuck-in operation of the needle, and the weft elimination process due to a weft insertion error is not hindered.

Embodiment An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 (a) shows a tack-in device installed on the weft insertion end side, and 1 is a cam box having a built-in cam mechanism. A shaft 2 and a hollow shaft 3 extend in the cam box 1 so as to be able to reciprocate back and forth. It is supported. Needle shaft 4 in hollow shaft 3
Are inserted, and can be reciprocated by a cam mechanism in the cam box 1. A needle 5 is attached to the tip of a needle shaft 4 extending from the hollow shaft 3, and a threading hole 5 a is provided at the tip of the needle 5. The tip of the needle 5 enters into the warp shed by pushing through the upper warp threads T, the threading hole 5a is disposed between the woven cloth W and捨耳W _1.

A mounting base 6 is erected and fixed between the distal ends of the shaft 2 and the hollow shaft 3, and a holding block 7 is fastened and fixed to a hanging portion 6 a of the mounting base 6. On the lower front surface of the holding block 7, a pair of nozzle stands 8, 9 are protrudingly arranged vertically.
As shown in FIG. 3 (a), an injection port 8a is provided on the lower surface of the upper nozzle table 8, and an introduction hole 9a is provided in the lower nozzle table 9 so as to face the injection port 8a. I have. An injection port 9b is provided on the upper surface of the lower nozzle table 9, and an introduction hole 8b is formed in the upper nozzle table 8 so as to face the injection port 9b.

A positioning bracket 10 is fastened and fixed to an upper portion of the mounting base 6 on the hollow shaft 3 side, and a stopper bolt 11 is screwed to a distal end portion of the positioning bracket 10. The stopper bolt 11 is in contact with a bolt 12 for fastening and fixing the needle 5 to the needle shaft 4, and the threading hole 5a of the needle 5 is positioned between the injection port 8a and the introduction hole 9a by this contact relation. You.

A pair of blades 13A and 13B are rotatably supported by a support shaft 14 on the lower side surface of the holding block 7, and guide pins 13a and 13b protruding from the rear portions of both blades 13A and 13B are connected to the cam box 1.
It is fitted in guide grooves 15a and 15b of a guide body 15 suspended and supported on the lower surface. The two blades 13A, 13B move back and forth integrally with the shaft 2 and the hollow shaft 3, and the guide grooves 15a, 15b and the guide pins 13a, 1
The two blades 13A, 13B open and close by the guide action with 3b.

A mechanical valve mechanism 16 is mounted on a side surface of the cam box 1. As shown in FIG.
Is a drive shaft 17 operatively connected to a drive mechanism in the cam box 1 and a valve plate fixed to the cam box 1 side.
18, a rotary valve 19 fastened and fixed to the drive shaft 17,
The valve plate 18 is provided with a pair of arc-shaped through holes 18a and 18b.
Is provided with a circular through hole 19a. Both through holes 18a, 18b
The arc center of the hole coincides with the rotation center of the drive shaft 17, and
The radius of the revolving locus of 19a matches the arc radius of both through holes 18a and 18b. Therefore, the through hole 19a communicates with each of the through holes 18a and 18b with the rotation of the drive shaft 17 in the direction of the arrow in FIG.
Makes one rotation for one rotation of the machine.

One through hole 18a of the valve plate 18 communicates with the injection port 8a via the air pipe 22, and the other through hole 18b is connected with the injection port 9b via the air pipe 21.

The cover 20 is connected to a pressure air supply source (not shown), and an electromagnetic valve 23 is provided between the cover 20 and the pressure air supply source.
And a throttle valve 24 are interposed in series. When the electromagnetic valve 23 is open and the through hole 19a of the rotary valve 19 and the through hole 18b of the valve plate 18 are in communication, air is injected from the injection port 9b, and the electromagnetic valve 23 is opened and the rotary valve 19 passes through. When the hole 19a and the through hole 18a of the valve plate 18 are in communication, air is injected from the injection port 8a.

FIG. 1 (b) shows a tuck-in device installed at the weft insertion start end side, which is the same as the configuration in which the blade bodies 13A and 13B (cutter) and the guide body 15 are removed from the tuck-in device installed at the weft insertion end side. In addition, the same reference numerals are given to the other same members, and the description is omitted.

A blow nozzle 26 is installed directly below the weft insertion main nozzle 25 installed in a sley shape (not shown), and a weft introduction duct 27 is installed immediately above the injection nozzle of the blow nozzle 26 and the weft introduction. The inlet of the duct 27 is set to face the injection path of the main nozzle 25 for weft insertion. An air guide 28 and a suction pipe 29 are provided immediately after the outlet of the weft introduction duct 27 which is directed to the rear of the weft insertion main nozzle 25, and a weft detection made of a transmission type photoelectric sensor is provided in the air guide 28. The blower 31 is connected to the curved portion of the suction pipe 29 while the vessel 30 is installed. The blow nozzle 31 is directed to the outlet of the suction pipe 29, and this outlet is directed to a dust box (not shown).

The blow nozzle 26, the weft introduction duct 27, the air guide 28, and the suction duct 29 swing together with the slay, and a take-up motor 32 is installed behind the slay's last retreat position, and is operated by the take-up motor 32. Connected drive roller
An air cylinder 34 is disposed directly above 33. The driven roller 35 is attached to the drive rod of the air cylinder 34 by the drive roller 33.
The air cylinder 34
Can be pressed against the drive roller 33 by the protruding operation of.

On the side of the front W ₂ woven fabric W at Figure 3 (b) are shown as weft insertion start end side and the electromagnetic cutter 36 is disposed, it is jetted weft insertion from the main nozzle 25 for weft insertion Every time the weft Y is beaten, the electromagnetic cutter 36 cuts and separates the weft Y from the weft insertion main nozzle 25. This electromagnetic cutter 36 constitutes a weft processing device together with the blow nozzle 26, the weft introduction duct 27, the air guide 28, the suction pipe 29, the weft detector 30, the blow nozzle 31, the take-up motor 32, the air cylinder 34, and the rollers 33, 35. Further, the electromagnetic cutter 36 also functions as the cutters 13A and 13B in the tack-in device on the weft insertion end side.

The main nozzle 25 for weft insertion, a blow nozzle 26, 31 and the air cylinder 34 is connected to the pressure air supply source through the electromagnetic valve _{V 1, V 2, V 3} , V 4, the electromagnetic valve V ₁ ~V ₄ receives command control from the control computer C. The control computer C determines whether the solenoid valves V ₁ to
V ₄ controls the operation of the electromagnetic valve 23 and the electromagnetic cutter 36.

The graphs in FIGS. 7A and 7B show a timing diagram in the tack-in device, and the flowchart in FIG. 8 shows a program for controlling the opening and closing of the electromagnetic valve 23 when a machine stop command is issued. Figure 7 (a), represents the back-and-forth movement curve curve C ₁ is the shaft 2 (b), the curve C ₂ represents the rocking curve of the needle 5. The cutting operation of the cutters 13A and 13B and the tuck-in operation of the needle 5 are performed at a predetermined timing according to the combination relationship between the two curves C ₁ and C ₂ .

At the time of normal operation, the control computer C is shown in FIG.
(B), the solenoid valve 23 is kept open as shown by curves C ₃ and C ₄ , and when the through hole 19 a of the rotary valve 19 communicates with the through hole 18 b of the valve plate 18, as shown by the curve C _5. Air is injected from the injection port 9b to the through hole 19a and the valve plate 1
When 8 communicates with the through hole 18a of the air from the injection port 8a as indicated by the curve C ₆ injects.

Weft yarn Y injected from weft insertion main nozzle 25
If the tip of the reaches to the installation position of the weft detector 37 installed in the weft insertion vicinity of the region corresponding to between the fabric W and捨耳W _1, the weft detector 37 controls the weft chromatic detection signal computer C Output to The control computer C detects the presence / absence of a machine stop command signal based on the machine rotation angle θ, and if there is no artificial machine stop operation, the subsequent operation of the loom based on the input of the weft presence detection signal. And the open state of the electromagnetic valve 23 is continued.

Cutter 13A of weft which has been weft tuck-in device of the weft insertion terminal side after beating, while being cut by 13B, FIG. 7 (a), an electromagnetic cutter shown by the curve C ₇ to (b)
The cutting operation of 36 cuts and separates from the weft insertion main nozzle 25. As shown in FIGS. 4 (a) and (b), the weft Y
The cut end of the hole 8b is introduced by air injection from the injection port 9b.
The cut end of the weft Y is inserted into the injection port 8a and the introduction port.
9a. In this gripping state, the tip of the needle 5 enters the warp shedding, and FIG.
As shown in (b), the threading hole 5a is arranged between the injection port 8a and the introduction hole 9a. Then, air is injected from the injection port 8a, and the cut end of the weft Y is introduced into the introduction hole 9a through the threading hole 5a of the needle 5. Next, the needle 5 rotates in the reverse direction and the threading hole 5a enters the warp opening, whereby the cut end of the weft Y is drawn into the warp opening, and a tack ear is formed.

If a weft insertion error occurs that the leading end of the inserted weft Y does not reach the installation position of the weft detector 37, the control computer C closes the electromagnetic valve 23 based on the weft non-detection information from the weft detector 37. And a command to stop the machine. Machine base is stopped after substantially machine base 1 rotates from the machine base stop initiated as indicated by the curve C _8, the electromagnetic valve 23 is closed machine frame stop start at substantially the same time, the injection port 8a in weft insertion cycles to machine base stop , 9b is blocked. Accordingly, the tip portion of the weft yarn Y ₁ also be reached between the nozzle block 8, 9 of the front end of the weft yarn Y ₁ of the weft as shown in FIG. 6 (a) is a weft insertion terminal side of the tuck-in device is introduced It is not introduced into the hole 8b, nor is it introduced into the introduction hole 9a through the threading hole 5a of the needle 5. This prevents the weft leading end from being tacked in at the weft insertion start end side.

When a weft insertion error occurs, the control computer C commands the operation of the weft processing device. That is, the curve shown in FIG.
Never cutting operation of the electromagnetic cutter 36 is performed in the next weft insertion indicated by C _7, never weft Y ₁ of weft and the weft Y ₂ subsequent to this is cut and separated. Under this condition, the control computer C commands the electromagnetic valves V ₂ and V ₁ to be opened, and the injection of the blow nozzle 26 and the injection from the weft insertion main nozzle 25 in the next weft insertion cycle are performed substantially simultaneously. The Figure 6 by injection action subsequent weft yarn Y ₂ as shown in (b) is insufflated into the weft guiding duct 27 without being weft insertion, subsequent weft yarn Y ₂ is passed through the gripping region of the two rollers 33 and 35 Then, it reaches the position where the weft detector 30 is installed.

The control computer C instructs the opening of the electromagnetic valves V ₄ and V ₃ and the operation of the take-off motor 32 based on the weft presence detection information from the weft detector 30, and both rollers 33 and 35 grip the succeeding weft Y _2. Rotate. With subsequent weft yarn Y ₂ by the grip and rotation is taken up, Yuki is sucked into the suction pipe 29, miss yarn Y ₁ Yuku drawn from the cloth fell W ₂ This withdrawal action. Tip miss yarn Y ₁ is because they are not tuck drawer mistakes yarn Y ₁ is smoothly performed. When the miss yarn Y ₂ is passed between all drawn by rollers 33 and 35, the control computer C to restore the weft processing apparatus to the initial state on the basis of the weft-free detection information from the weft detector 30.

Such weft mishandling yarn Y ₁ removal operation by the device presupposes that securely inserted subsequent weft yarn Y ₂ to the weft introducing duct 27, but weft insertion injection port of the starting end of the tuck-in device
The air jet from 9b is the subsequent weft Y ₂ into the weft introduction duct 27.
Inhibits the insertion of That is, injection port indicated by the curve C ₅ of FIG. 7
Injection start timing of 9b is earlier than the injection start timing of the blow nozzle 26, its insertion into the subsequent weft yarn Y ₂ of the weft introduction duct 27 by the jet action from the injection port 9b for is disturbed, the weft guiding duct 27 there is a risk of failure of the insertion of a subsequent weft yarn Y _2.

However, in this embodiment, when a weft insertion error occurs, the electromagnetic valve 23
Because would stop closed to injection port 8a, the injection from 9b to not fail to insert subsequent weft yarn Y ₂ to the weft introducing duct 27, the removal of mis yarn Y ₁ is smoothly .

The graph of FIG. 7 (b) shows a timing diagram of the tack-in device in the case of a machine stop other than a weft insertion error (for example, a warp break, an artificial machine stop, etc.). In this case, the closing timing of the electromagnetic valve 23 is, for example, after the machine stop, and the tack-in in the next weft-insertion cycle after the weft-insertion cycle including the machine-stop detection timing θ is the weft insertion end side and the weft insertion start end side. This is accomplished in any tack-in device.

As described above, air injection from the injection ports 8a and 9b for tack-in during normal operation is left to the opening and closing control of the mechanical valve mechanism 16, and air injection timing control in the case of occurrence of weft insertion error is performed by the electromagnetic valve 23. Tack-in operation during normal operation by mechanical valve mechanism
The air injection timing can be easily changed by opening / closing control of the electromagnetic valve 23 by performing a reliable operation with no response delay of 16.

The present invention is, of course, not limited to the above-described embodiment, and for example, a yarn arranging air injection device as shown in FIG. 9 is also possible. In this air jet device for arranging yarn, a pair of upper and lower nozzle pipes 38 and 39 are opposed to each other,
Air passages 38b, 39 around nozzle tubes 38, 39 communicating with 38a, 39a
Air pipes 21 and 22 are connected to b. Double nozzle tube 38,3
9 also serves as the introduction holes 8b, 9a in the above embodiment, the cut end of the weft is blown into the upper nozzle tube 38 by air injection from the lower nozzle tube 39 and is gripped,
The cut end of the weft passes through the threading hole 5a of the needle 5 by the air injection from the upper nozzle tube 38, and the lower nozzle tube 39
It is blown in.

Also, a needle having a hook portion at the tip instead of the threading hole can be used as the needle.

Further, the apparatus has one air injection port and a corresponding air introduction port as a yarn arrangement air injection apparatus, and the hook end is connected to the hook end introduced and held in the air introduction port by the fluid injection action of the air injection port. The present invention can also be implemented in a tack-in device configured to be hooked by a provided needle.

[Effects of the Invention] As described in detail above, the present invention arranges a mechanical valve and an electromagnetic valve in series to supply air to the yarn arranging air injection device in the tuck-in device. By stopping the operation of the yarn arranging air injection device by closing the electromagnetic valve, the tack-in of a weft insertion error is prevented, and the electromagnetic valve is opened except when a weft insertion error occurs. The operation of the yarn arranging air injection device is continued to complete the tack-in of the weft yarn. During normal operation, the yarn arranging air injection device is opened and closed in synchronization with the weft insertion cycle of the loom. Control the supply of pressurized air to the engine, so that the tuck-in operation during normal operation is left to the reliable opening / closing control of the mechanical valve and the air injection The change of the timing is entrusted to the opening and closing control of the electromagnetic valve, whereby it is possible to easily prevent the completion of the tack-in operation by the yarn arranging air injection device as required while achieving good ear formation during normal operation. In addition, since a larger tension than usual is not applied to the weft yarn that has been mistakenly inserted, an excellent effect that it is possible to avoid a situation in which the woven fabric structure is broken or the weft is cut can be prevented. .

[Brief description of the drawings]

1 to 8 show an embodiment of the present invention.
1 (a) is a perspective view showing a tuck-in device at the weft insertion end side, FIG. 1 (b) is a perspective view showing a tuck-in device at the weft insertion start end side, FIG. 2 is an exploded perspective view of a mechanical valve mechanism, and FIG. 3 (a) is a longitudinal sectional view showing a main part of the tuck-in device on the weft insertion end side, and FIG. 3 (b) is a longitudinal sectional view showing a main part of the tuck-in device on the weft insertion start end side and the weft processing device. 4 (a) is a longitudinal sectional view showing a thread gripping state in a weft insertion end side tuck-in device, FIG. 4 (b) is a vertical sectional view showing a yarn gripping state in a weft insertion start end tuck-in device, and FIG.
FIG. 5A is a longitudinal sectional view showing a thread inserted state in the weft insertion end side tuck-in device, FIG. 5B is a longitudinal sectional view showing a thread inserted state in the weft insertion start side tuck-in device, and FIG. FIG. 6A is a longitudinal sectional view showing a state of stopping the air injection, FIG. 6B is a longitudinal sectional view showing a processing state of the weft processing device, and FIG.
7A is a graph showing a timing diagram of a tuck-in operation when a weft-insertion error occurs, FIG. 7B is a graph showing a timing diagram of a tuck-in operation when the loom stops other than the occurrence of a weft-insertion error, and FIG. valve
FIG. 9 is a flow chart showing an open / close control program of FIG. 23, and FIG. 9 is a longitudinal sectional view showing another example. Injection opening 8a of the air injector thread arrangement, 9b, mechanical valve mechanism 16, the electromagnetic valve 23, miss yarn Y _1.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D03D 47/48 D03D 51/00 D03D 51/34

Claims (2)

(57) [Claims] A needle reciprocating back and forth and rotating back and forth;
A tuck-in operation is performed in cooperation with a yarn arranging air ejecting device for arranging a weft end portion in a tuck-in action region of the needle and an air pipe facing the yarn arranging air ejecting device. In a tuck-in device in which an electromagnetic valve is interposed on a pressure air supply path between a pressurized air supply source and a weft insertion error, the electromagnetic valve is closed to stop the operation of the yarn placement air injection device when a weft insertion error occurs. A shuttleless loom that prevents the tack-in of a weft insertion mistake and completes the weft tuck-in by keeping the electromagnetic valve open and continuing the operation of the yarn placement air ejector except when a weft insertion error occurs. Tuck-in method. 2. A needle that reciprocates back and forth and rotates reciprocally;
A tuck-in operation is performed in cooperation with a yarn arranging air injection device for arranging a weft end portion in a tuck-in action region of a needle, and a pressure air supply path between the yarn arranging air injection device and a pressure air supply source In a tuck-in device having an electromagnetic valve interposed therebetween, in a shuttleless loom in which a mechanical valve that opens and closes in synchronization with a weft insertion cycle of a loom on the pressure air supply path so as to be in series with the electromagnetic valve. Tuck-in device.