JPS5916017B2 - N change weft storage device for fluid injection type shuttleless loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weft storage device for a fluid jet type shuttleless loom.

When carrying out N-threading in a fluid-jet type shuttleless loom, the length of the continuously delivered weft yarn is measured to the length required for N times of weft insertion.

Next, this weft yarn is stored in a storage body that is provided with a protrusion for regulating the weft yarn to the length required for one weft insertion, and is stored at an appropriate timing by driving the storage body weft injection device. The weft is inserted into the shed intermittently N times in a row.

This operation is performed alternately for the two wefts.

However, in the conventional weft storage device as described above, the length of the weft stored in the storage body is the amount used for N times of weft insertion, and is very long. It has a U-shaped posture.

Otherwise, the storage body would have to be structurally large, which would be inconvenient for installation in the limited space for a loom.

However, in order to maintain the thread in this U-shape within the storage body, it is necessary to carry the thread onto the airflow by suction or blowing in order to maintain that position, even temporarily.

However, in this case, the resistance to pulling out the yarn when inserting the weft is large.

Furthermore, with highly twisted yarns, even if airflow is used in this manner, yarn loops are likely to occur within the storage body, and the stored weft yarns may become entangled with each other.

Therefore, a fluid jet having a strong weft conveying force is required for weft insertion, and these may also cause failure in weft insertion.

SUMMARY OF THE INVENTION An object of the present invention is to provide a new type of weft storage device that eliminates these drawbacks in the conventional type of weft storage device.

According to the present invention, N weft yarn storage bodies are provided for each of the two weft yarns that carry out N-threading from the upstream side to the downstream side of the yarn flow.

Among these reservoirs, the most upstream reservoir is arranged to receive the weft from the weft supply source, and the most downstream reservoir is arranged to receive the weft from the weft injection nozzle.

Furthermore, a weft gripper and/or a roller that rotates at a predetermined rotational speed is provided between each storage body at a predetermined timing.

In this case, the operating period of each gripper provided on the first weft has an irregular phase difference with respect to the operating time of the corresponding gripper on the second weft.

The present invention will be described in more detail below with reference to embodiments shown in the accompanying drawings.

The attached drawings are for specifically explaining the two-koshi weaving in relation to N-tachi, but these can be applied in the same way to general N-tachi.

What is shown in FIG. 1 is a first embodiment of the present invention, which includes yarn feeders 1 and 2, a length measuring drum 4, and storage bodies 5 and 5'.

7, γ gripper 6, 6', 8, 8' weft injection nozzle 9°9
′.

That is, the weft yarns Y and Y are continuously supplied from the yarn supplying bodies 1 and 2.
are sent out by the length measuring drum 4, which rotates in synchronization with the operation of the loom, at a speed equal to the weft speed (a) in the case of single yarn weft insertion.

Therefore, for one repeat of weaving as defined in FIG. 2, if the loom rotates by the number of z repeats, the amount of weft yarns Y and Y' required for one weft insertion will be sent out from the measuring drum 4. This is the reason.

Of the two wefts, the weft Y passes through the storage body 5, through the gripper 6, through the storage body 7 again, through the gripper 8, and is introduced into the weft injection nozzle 9, from where it heads toward the shed (not shown). The weft is inserted.

Here, each of the storage bodies 5.degree. 5', 7, and 7' is provided with a pool nozzle (not shown) for actively introducing the weft yarn into the storage body.

The other weft Y' also has a storage body 5', a gripper 6',
The weft injection nozzle 9 is passed through the storage body 7' and the gripper 8', respectively.
The weft is introduced into the shed, and from there it is fed into the shed (not shown).

Next, the operating state of each part will be explained with reference to FIGS. 2 and 3.

For convenience of explanation, the first weft insertion is defined as ¥1 and the second weft insertion is defined as ¥2 among the two consecutive weft insertions in the double weave weaving.

Similarly, for the weft Y', the first weft insertion is changed to Y1' and the second weft insertion.
The second weft insertion is defined as Y2'.

Further, the weft injection nozzles 9 and 9' each insert the weft alternately twice, thereby performing so-called two-over weaving.

Further, as mentioned above, FIG. 2 is an operation timing chart of the gripper in relation to weft insertion, and the illustration is determined as follows.

The shaded line portion for the weft indicates the weft insertion period.

The shaded area for the gripper indicates the gripping operation period.

Moreover, the grippers 6, 6', 8, and 8' hold the weft Y,
It operates periodically at the timing described below in relation to the weft insertion of Y', and in relation to this, the circle mark in Fig. 3 indicates the state in which the gripper releases its grip on the weft thread. show,
The symbol ■ indicates that the gripper is gripping the weft thread.

First, the side related to one weft Y will be explained.

The gripper 8 on the downstream side holds Y1. The grip is released only at Y2.

The gripper 6 on the upstream side runs from the end of the second weft insertion Y2' of the weft Y to the end of the first weft insertion Y1 of the weft Y, or a time slightly delayed from that time (at the latest before the start of weft insertion Y2). Grasp the weft thread only.

Next, the side related to the other weft Y'2' will be explained.

The gripper 8' on the downstream side holds ¥1' when the weft Y is inserted. The grip is released only at Y2'.

The gripper 6' on the upstream side is operated from the end of the second weft insertion Y2 of the weft Y to the end of the first weft insertion Y1' of the weft Y, or a time slightly delayed from that time (at the latest before the start of weft insertion Y2'). ) grips the weft only.

As is clear from the timing chart shown in FIG. 2, the grippers 6 and 8 for the weft Y and the grips 6' and 8 for the weft Y
As shown in the figure, the same operation is performed with a difference of repeats from each other for one reheat weaving.

Therefore, the storage of the weft Y will be explained first.

In FIG. 2, at time a when the weft insertion Y2 of the weft yarn Y ends, all the weft yarn Y stored up to that time has been used for weft insertion, so that the storage body 5. “No weft yarn Y is stored inside 7.

Therefore, the storage bodies 5, 7 are in the state shown in FIG. 3A.

In this state, first, the gripper 8 operates to grip the weft Y, and further the gripper 6 releases the grip on the weft Y.

Therefore, the weft yarn sent out from the length measuring drum 4 begins to be stored in the storage body 7 as shown in FIG. 3B.

When the second weft insertion Y2' of the weft yarn Y is completed at a certain time, the gripper 6 is activated and starts gripping the weft yarn Y at the same time.

Therefore, storage of the weft yarn Y in the storage body 7 is inevitably stopped, but at this time, the length measuring drum 4 is already sending out the weft yarn Y into the storage body T at a speed that is % of that in the case of single yarn weft insertion. Therefore, the amount of weft required for one weft insertion is stored.

At time C, the gripper 8 releases the grip on the weft Y, and the third
As shown in FIG. C, the weft yarn Y stored in the storage body 7 is inserted toward the shed by the operation of the weft injection nozzle 9.

Needless to say, the weft yarn Y is stored in the storage body 5 during this time.

At time d, the weft insertion Y1 ends and the gripper 8 grips the weft Y.

Further, at time d or with some delay from time d, the grasping of the weft yarn Y by the gripper 6 is released, and at the same time, as shown in the third figure, the weft yarn Y is stored in the storage body 5 by the action of the pool nozzle provided in the storage body 7. The weft yarn Y, which had been stored, immediately moves into the storage body 7.

When the above-mentioned movement of the weft yarn Y is completed, the weft yarn Y sent out from the length measuring drum 4 comes to be stored inside the storage body 7.

Subsequently, at time e, the grasping of the weft yarn Y by the gripper 8 is released, and the second weft insertion Y2 of the weft yarn Y stored in the storage body 7 is started as shown in FIG. 3E.

At this time, weft insertion Y2 and storage of the weft yarn Y inside the storage body 7 are performed simultaneously.

At time a, weft insertion of the weft yarn Y stored in the storage body 7 is completed, and the interior of the storage bodies 5 and 7 returns to the state shown in FIG. In this case, the weft Y1 is not stored at all.

The above-mentioned operations are repeated regarding the insertion of the weft yarn Y.

Furthermore, as is clear from the timing chart of FIG. 2, the weft insertion operation of the weft yarn y/ has a phase difference of ×repeat with respect to the weft insertion operation of the weft yarn Y at time a', exactly the same as in the case of the weft yarn Y.
-e' in the conditions shown in FIGS. 3A to 3E.

Therefore, the weft yarns Y and y are alternately inserted twice in succession, thereby making it possible to reliably perform two-way weaving.

FIG. 4 shows a second embodiment of the present invention, and shows the weft yarns Y, ? For each of the length measuring drum 4, storage body 5, 5
', 7, 7', grippers 8, 8', weft injection nozzle 9. The point that q is provided is exactly the same as in the first embodiment.

According to this embodiment, the gripper 6 in the first embodiment
, 6', the storage body 5 is used for each of the wefts Y and Y.
, 5' and the reservoir 7. rollers 16, 16' between
is provided.

These rollers 16 and 16' are formed so as to send out the weft yarn at a speed of x in the case of single yarn weft insertion, and furthermore, as shown in the timing chart of FIG. It has a function to release the weft from being held in order to stop sending out the speed.

In the figure, the shaded portions of the rollers 16 and 16' indicate the period during which the weft is released from being held.

That is, the roller 16 related to the weft yarn Y is moved at the end of the weft insertion Y1 or at a time slightly delayed from that time (at the latest at the end of the weft insertion Y2).
The nipping of the weft yarn Y is released from (before the start of weft insertion Y2) until the end of weft insertion Y2, and the roller 16' operates with a delay of z repeats after the operation of the roller 16 until the end of weft insertion Y1' or a time slightly delayed from that time (at the latest). (Before weft entry Y 2' start)
The clamping of the weft yarn Y is released from to the end of weft insertion Y2'.

Therefore, during the weft yarn nipping release period, the weft yarns Y and Y can freely move with respect to the rollers 16 and 16'.

The driving of other elements such as the grippers 8.8' is exactly the same as in the first embodiment.

Next, storage and insertion of one weft Y in the second embodiment will be explained using FIGS. 5 and 6.

That is, at time a when the weft insertion Y2 in FIG. Y is not stored at all and is in the state shown in FIG. 6A.

In this state, the gripper 8 and the roller 16 operate respectively, the gripper 8 grips the weft Y, the roller 16 clamps the weft Y, and sends out the weft Y at a speed of 2 in the case of single yarn weft insertion. .

Therefore, as shown in FIG. 6B, the weft Y, which is sent out from the measuring drum 4 at a speed of % when a single yarn is inserted, is delivered into the storage body 5 at a speed of % when a single yarn is inserted. The yarn is stored in the storage body 7 at the same speed as in the case of single yarn weft insertion.

Therefore, when the second weft insertion Y2' of the weft yarn y ends at a certain time, the amount of weft yarn 2 necessary for one weft insertion is stored inside the storage body 5, and the amount of weft yarn 2 necessary for one weft insertion is stored inside the storage body 7. % of the amount of weft required for one weft insertion is stored.

At time C, the gripper 8 releases its grip on the weft Y, and the first weft insertion Y1 of the weft Y is started.

At this time, the weft yarn Y continues to be stored by the roller 16 at a speed of 2 in the case of single yarn weft insertion, so inside the storage body 7, as shown in FIG. 6C, the weft yarn Y is extracted and stored in parallel. It will be done.

This operation continues until time d, and the amount of weft yarn stored from time to time d is % of one weft insertion, so the amount of weft yarn Y stored from time a to time d is The total amount is the amount required for one weft insertion.

Further, the total amount of weft yarn Y stored in the storage body 5 from time a to time d is equal to the amount a of the amount required for one weft insertion.

At time d, the gripper 8 operates to grip the weft Y, and the weft insertion Y1 is completed.

As mentioned above, the total amount of weft yarns stored in the storage body 7 was the amount required for one weft insertion, so all the stored weft yarns were used for weft insertion Y1, as shown in the sixth diagram. Thus, no weft yarn Y is stored inside the storage body 7 at all.

Subsequently, at time d or a time slightly delayed from time d, the rollers 16 release the weft yarn Y from being held, as described above.

At this moment, all the weft yarns Y stored in the storage body 5 move into the storage body 7 by the action of a pool nozzle (not shown) provided in the storage body 7, as shown in FIG. 6E.

At time e, the gripper 8 releases its grip on the weft Y, and weft insertion Y2 starts.

At this time as well, as shown in FIG. 6F, the weft yarn Y is extracted and stored in the storage body γ in the same manner as in the case of the first weft insertion.

However, since the rollers 16 have released the weft Y from nipping, the storage speed in this case is equal to the weft speed A in the case of single yarn weft insertion, which is the weft sending speed of the length measuring drum 4.

Therefore, as mentioned above, the weft yarn A required for one weft insertion is stored during the period from time a to time d, and the remaining weft yarn A is stored during the period from time d to time a. Let it happen.

At time a, weft insertion Y2 of the weft yarn Y stored in the storage body 7 is completed, and the storage bodies 5 and 7 return to the state shown in FIG. In this case, the weft yarn Y is not stored at all.

The above-mentioned operations are repeated regarding the insertion of the weft yarn Y.

Further, as is clear from the timing chart of FIG. 5, the weft insertion operation of the weft yarn Y is performed in exactly the same manner as the operation of the weft yarn Y with a phase difference of 1,4 +) beats.

Therefore, the weft yarns Y and Y are alternately inserted twice in succession, making it possible to reliably perform two-way weaving.

FIG. 7 shows a third embodiment of the present invention, in which the length measuring drum 4, the storage bodies 5°5',' Reservoir 7, 7
', gripper 8. This embodiment is similar to the first and second embodiments in that weft injection nozzles 9 and 9' are provided.

According to this embodiment, a roller 26.2 is provided between the storage bodies 5, 5' and the storage bodies 7.7' for each of the weft yarns Y, Y.
6' and grippers 28°28' are provided.

The rollers 26 and 26' are formed so as to send out the weft yarn at the speed A in the case of single yarn weft insertion, and furthermore, as shown in the timing chart of FIG. It has a function to release the weft from being held in order to stop sending out at that speed.

That is, the roller 26 releases the weft yarn Y from the time when the weft insertion Y1 of the weft yarn Y ends or a time slightly delayed from that time (at the latest before the start of weft insertion Y2) until the end of the weft insertion Y1' of the weft yarn Y, The roller 26' releases the weft yarn y from the time when the weft insertion of the weft Y ends or a time slightly delayed from that time (at the latest before the start of the weft insertion Y2') until the time when the weft insertion Y1 of the weft Y ends.

The gripper 28 is operated as shown in the timing chart of FIG.
Weft entry Y1 of weft Y from the time when weft entry Y2 of weft Y ends
The gripper 28' grips the weft Y until the time when the weft Y2' of the weft Y ends, and the gripper 28'
It is formed so as to hold the weft Y until the time when the weft 1 ends.

Next, storage and weft insertion of the weft Y in the third embodiment will be explained.

At time a when weft insertion Y2 ends in FIG. 8, no weft yarn Y is stored in each of the storage bodies 5 and 7, as in the first and second embodiments, as shown in FIG. 9A. in a state.

In this state, first, the grippers 28 and 8 operate to hold the weft Y, and the roller 26 releases the grip of the weft Y.
The weft yarn Y sent out from the length measuring drum is stored only inside the storage body 5 as shown in FIG. 9B.

Next, when the weft insertion Y1' ends at a certain time, the amount of weft yarn Y required for one weft insertion is stored inside the storage body 5 at this point.

Furthermore, at this point, the gripping device 28 releases the grip on the weft yarn Y, and the rollers 26 operate to grip the weft yarn Y. Therefore, as shown in FIG.
As shown in the figure, storage of the weft yarn Y is also started inside the storage body 7.

As mentioned above, the roller 26 sends out the weft yarn Y at the same speed as the measuring drum 4 (weft speed 2 in the case of single yarn weft insertion), so at time C, the amount of weft yarn stored inside the drum 5 is Constant value (as mentioned above, the amount required for one weft insertion)
is maintained.

At time d, weft insertion Y1 is started, and the weft yarn Y stored in the storage body 7 is inserted as shown in the ninth diagram.

Here, since the period from time to time e when weft insertion Y1 ends is an repeat, the weft yarn Y required for one weft insertion is stored in the storage body 7 during this period, and this is transferred to the weft insertion Y.
All of them are used in 1.

At time e, weft insertion Y1 ends, and the gripper 8 operates to grip the weft Y.

Further, at time e or a time slightly delayed from time e, the rollers 26 release the weft Y from being held.

Therefore, as shown in FIG. 9E, the weft Y stored in the storage body 5 (% of the amount of weft required for one weft insertion) is
It moves from the storage body 5 into the storage body 7 by the action of the pool nozzle provided in the storage body 7.

Thereafter, the weft yarn Y sent out from the length measuring drum 4 is directly stored in the storage body I.

At time f, the gripper 8 is released and weft insertion Y2 is started.

Therefore, the weft yarn Y stored in the storage body 7 is inserted as shown in FIG. 9F in exactly the same manner as in the case of weft insertion Y1.

During this time, in the storage body 7, storage and extraction of the weft yarn Y are performed in parallel as in the case of the weft insertion Y1 described above.

At time a, weft insertion Y2 ends, and each storage body 5.7 returns to the state shown in FIG. 9A.

In the above storage and weft insertion operations, the amount of weft stored in the storage body 7 immediately before the start of weft insertion Y1 and weft insertion Y2 is the same, and furthermore, the amount of weft yarn stored in the storage body 7 during each weft insertion period is the same. The wefts are formed so that the storage speeds of the weft yarns stored in the wefts are the same.

That is, the period during which the weft yarn Y is stored in the storage body 7 before weft insertion Y1 is started is the period X shown in FIG. 8, and the weft yarn Y is stored in the storage body 7 before weft insertion Y2 is started. The period during which the weft yarn Y is stored is the combined period of Zl and Z2 shown in FIG.

Period X and period Z1+Z2 have the same length, and
Since the delivery speed of the weft yarn Y is % of the case where both the measuring drum 4 and the roller 26 have a single yarn weft insertion, the weft insertion speed Y1. The amount of weft stored in the storage body 7 before Y2 is started is the same.

Further, as described above, the weft storage speeds at which the weft is stored in the storage body 7 during weft insertion are the same speed A in the case of single yarn weft insertion.

As mentioned above, the fact that weft insertion is always performed in the same weft storage state in Futakoshi Kaori is because a large number of auxiliary nozzles are installed in the weft flight path in the shed, and air is ejected from the auxiliary nozzles. This is very useful in air-jet type shuttleless looms in which the jets move sequentially downstream, since the timing of weft insertion must always be the same.

As for the weft yarn Y, weft insertion is performed with an irregular phase difference, just as in the case of the weft yarn Y.

Therefore, Futakoshi Kaori can be reliably performed.

As is clear from the above description, according to the present invention, N storage bodies are provided during N-overweave reweaving, and a gripper that operates at a constant timing and/or a gripper that operates at a constant timing and/or a gripper that pinches the weft yarn at a constant timing is provided between the N storage bodies. The rollers are installed to store the amount of weft yarn required for one weft insertion in the storage body on the most downstream side during each weft insertion, so the pull-out resistance of the yarn during weft insertion is small and the highly twisted yarn is No thread loops will occur even in the case of thread loops.

Therefore, two-koshi reweaving can be reliably performed without the weft yarns becoming entangled inside the storage body.

In addition, unlike the conventional weft storage device, a large storage body is not required, and the weft storage device is composed of a combination of multiple small storage bodies for inserting single yarn wefts, making the entire device compact. It has the advantage of being able to be formed.

[Brief explanation of the drawing]

FIGS. 1, 4, and 7 are explanatory diagrams showing embodiments of the present invention, and FIGS. 2, 5, and 8 are timing diagrams showing the operation of each part in the embodiment of the invention. and
Figures 3, 6, and 9A. B, C, D, E, and F are explanatory diagrams showing the storage state of weft yarns in each storage body. 1.2... Yarn feeder, 4... Length measuring drum, 5, 5'. 7.7'...Reservoir, 6, 6', 8, 8', 2
B, 28'...Gripper, 9,9'...
Weft injection nozzle, 16° 16', 26, 26'...
...Roller, Y, Y'...Weft.

Claims (1)

[Scope of Claims] 1 N storage bodies 5 and 7 each provided from the upstream side to the downstream side of the yarn flow for each of the two weft yarns Y and Y' for which N-cross weaving is performed. In between, the grippers 6 and 28 grip the weft yarn at a predetermined timing, and the rollers 1 send out the weft yarn at a predetermined rotational speed and release the gripping of the weft yarn at a predetermined timing.
A N Koshigaya weft storage device for a fluid jet type shuttleless loom, characterized in that at least one of 6 and 26 is provided. 2. The invention according to claim 1, wherein the weft Y
Two storage bodies 5, 7 are provided from the upstream side to the downstream side of the yarn flow for the weft yarn Y'; similarly, two storage bodies 5', 7' are provided for the weft yarn Y': A gripper 6 is provided between the reservoirs 5 and 7, and the reservoirs 5/,
A gripper 6' is provided between 7/7; since the gripper 6 is used at the end of weft insertion Y2', the gripper 6 is used during the period from the end time d of weft insertion Y1 to the start time e of weft insertion Y2. The gripping device 6' grips the weft yarn Y until a predetermined time, and the gripping device 6' grips the weft yarn Y' while maintaining a phase difference between the operation period of the gripping device 6 and repeats. 3 The invention according to claim 1, wherein the weft Y
For the weft Y, two storage bodies 5 and 7 are provided from the upstream side to the downstream side of the yarn flow; similarly, two storage bodies 7' are provided for the weft Y; A roller 16 is provided between 5 and 7, and the storage body 5
A roller 16' is provided between / and 7/; the roller 16 sends out the weft yarn Y at a speed corresponding to the weft speed in the case of single yarn weft insertion, and further moves the weft yarn Y from the end of weft insertion Y1 to weft insertion Y2. The weft is released from the weft clamping from a predetermined time during the period leading to the start time e of weft insertion Y2 until the end time a of weft insertion Y2; The present invention is characterized in that the weft yarn Y' is released from the weft yarn Y' by maintaining the phase difference between the weft yarn nipping release operation period of the roller 16 and the falling repeat. 4 The invention as set forth in claim 1, wherein the weft Y
For the weft yarn, two storage bodies 5 and 7 are provided from the upstream side to the downstream side of the yarn flow; similarly, two storage bodies 5' and γ are provided for the weft Y', and the storage A roller 26 and a gripper 28 are provided between the bodies 5 and 7, and a roller 26' and a gripper 28' are provided between the storage body 7'; In the case of weft insertion, the weft thread is sent out at speed A, and further from a predetermined time during the period from the end time e of weft yarn ¥1 to the start time f of weft insertion Y2 to the end circle of weft insertion Y1'. The gripper 28 releases the gripping of the weft yarn Y, and grips the weft yarn Y for a period from the end of weft insertion Y2 to the end of weft insertion Y1'; The weft yarn Y' is sent out at a speed of % of the weft speed in the case, and the weft yarn Y' is released from the weft yarn pinching while maintaining the phase difference between the weft yarn nipping release operation of the roller 26 and the repeat.
The gripper 28' is characterized by gripping the weft yarn Y' while maintaining a phase difference between the operating period of the gripper 28 and the % repeat.