JPS61174447A - Weft yarn length measuring apparatus in shuttleless 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 Object of the Invention (Field of Industrial Application) The present invention relates to a weft length measuring device for a shuttleless loom equipped with a weft attachment and storage surface for adhering and storing the weft ejected from a storage nozzle. It is.

(Prior art) In a fluid jet loom, it is necessary to measure and store a predetermined length of weft supplied from a weft supply source each time weft is inserted, and conventionally, such a storage device has been equipped with a length measuring roller. Commonly used storage devices include air-boole type storage devices that eject and store the weft threads that are continuously measured by a mechanism into a storage pipe, and drum-type storage devices that measure and store the weft threads by winding them around a drum. It has been adopted. However, in all of these weft yarn storage devices, the weft pulling resistance is large, so it is necessary to increase the injection pressure of the main nozzle for weft insertion to increase the weft propulsion force, resulting in increased consumption of compressed air and even more There is a problem in that a weak weft yarn causes jetting to break in the main nozzle for weft insertion.

An example of a weft storage device that attempts to solve this problem is disclosed in Japanese Patent Laid-Open No. 57-95349. In this conventional device, the weft yarn is blown from a storage nozzle onto the outer surface of an endless belt stretched between a driving roller and a driven roller, and is deposited in a coil shape. In this storage form, the pull-out resistance of the weft is small;
Increased compressed air consumption and thread breakage, which were problems in the air pool method or drum pool method, are eliminated.

(Problem to be Solved by the Invention) However, in this conventional device, after all the wefts stored on the weft storage surface are pulled out, the wefts ejected from the storage nozzle are directly Immediately after all the stored wefts are pulled out, the wefts are directly inserted from the storage nozzle. The flying speed of the weft yarn flying in the guide path suddenly decreases. Therefore, the reaction of this sudden drop in speed causes problems such as poor flight of the weft that induces errors in weft insertion, and the weft that jumps out of the weft guide path.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a weft adhesion device that moves with respect to a storage nozzle that spouts out weft yarns and adheres and stores the weft yarns jetted from the storage nozzle. The weft locking body is moved within a predetermined circulation path that can engage with the storage surface, and the weft locking body is engaged with the weft attachment storage surface at a predetermined time and separated from the weft attachment storage surface to form a weft attachment storage surface. The weft locking and releasing operations were repeated on the weft attachment and storage surface, and the weft length for one weft insertion was measured on the weft attachment and storage surface.

(Function) In other words, while moving in a predetermined circulation path that can engage with the weft adhesion storage surface that is moving with respect to the storage nozzle, it engages with the weft adhesion storage surface and removes the stored weft on the weft adhesion storage surface. The locked first weft locking body is separated from the weft attachment storage surface at a predetermined time, for example, just before weft insertion starts, and the stored weft begins to be pulled out from the weft attachment storage surface at the same time as weft insertion begins. On the other hand, a second weft locking body following the weft locking body starts engaging with the weft attachment and storage surface at a predetermined time, for example, immediately after the start of weft insertion, and locks the stored weft on the weft attachment and storage surface. As a result, the length of the weft for one weft insertion is measured between the weft locking positions on the weft attachment storage surface by the two thread locking bodies, and the locking action of the second weft locking body Weft insertion ends when the withdrawal of the stored weft is stopped. Therefore, during the weft insertion period, there is no sudden change in the flying speed of the weft yarn flying in the weft guide path, and weft insertion is performed satisfactorily.

(Example) Hereinafter, an example embodying the present invention will be described based on FIGS. 1 to 3.

The weft yarn Y supplied from the cheese 1 is wound around a yarn guide 2 and a feed roller 3 that is continuously driven to rotate at a predetermined speed, and is guided to the weft length measuring device 4 side.

To explain the weft length measuring device 4 in detail, a support frame 5 is vertically fixed to a fixed part such as a side frame of the loom, and a drive roller 6 and a support frame 5 are installed on the front side (weft insertion side) of the frame 5. Driven rollers 7 are rotatably arranged at predetermined intervals in the left-right direction. An endless belt 8 is wound around both rollers 6.7, and a moquette 9 is laid on the outer surface of the belt 8 to form a weft adhesion storage surface 10. A drive motor 11 is disposed and supported in the axial direction of the roller 6 on the front side of the support frame 5 on the lower side of the drive roller 6, and a belt 12 is hooked between the drive shaft 11a and the shaft 6a of the drive roller 6. The drive roller 6 is connected to the motor 11.
is rotated at a predetermined speed in the direction of arrow P in FIGS. 1 and 2.

A support arm 5a is formed protruding from one side of the support frame 5 on the side of the drive roller 6, and a storage nozzle 13 is supported through the arm 5a. The tip of the nozzle 13 is directed toward the weft adhesion storage surface 10 on the drive roller 6, and the weft Y fed out from the feed roller 3 and introduced into the storage nozzle 13 is directed toward the weft adhesion storage surface 10. It is designed to be ejected continuously. The weft Y blown from the storage nozzle 13 onto the weft adhesion storage surface 10 is deposited in a coiled form on the weft adhesion storage surface 10 which is moved in the rotational direction of the drive roller 6 (direction of arrow P). Ru.

A drive motor 14 is supported on the back surface of the support frame 5, and its drive shaft 14a passes through the support frame 5 and projects above an intermediate position between both rollers 6.7. A pipe 16, which is fitted and fixed to the center of a disc 15, is fitted into the tip of the drive shaft 14a and is fastened and fixed with a nut 23. Five support shoulders 17 of the same length are arranged and fixed radially on the circumference of the pipe 16, dividing the circumference into five equal parts, and at the tip of each support shoulder 17 there are five weft locking bodies 18, 18A, 1
8B is attached. These support shoulders 17 and the weft thread stops 18, 18A, 18B are also fastened to the disc 15 and the weft thread stops 18.18A.

18B is arranged at the periphery of the disc 15. The peripheral edge of the disc 15 is pressed against the upper surface of the end of the belt 8 on the side of the support frame 5, so that the weft attachment storage surface lO is formed into an arcuate concave surface, and the weft thread locking bodies 18, 18A, 18B are formed into an arcuate concave surface. The weft yarn Y attached and stored on the weft attachment and storage surface 10 is adapted to be engaged with the weft yarn attachment and storage surface 10 of the shape.
are press-locked onto the weft attachment and storage surface 10 by the respective weft locking bodies 18, 18A and 18B.

The drive shaft 14a is rotated in the direction opposite to the rotational direction of the drive roller 6, that is, in the direction of the arrow Q in FIG. There is. That is, the weft locking bodies 18.18A, 18
'B moves on a circular circulation path centered on the drive shaft 14a at the same speed as the weft attachment storage surface 10, and the drive roller 6
An operation of engaging with the arcuate concave weft adhesion storage surface 10 from the side and moving away from the weft adhesion storage surface 10 on the driven roller 7 side to lock and release the stored weft Y on the weft adhesion storage surface 10. is repeated. In this embodiment, the weft locking bodies 18, 18A, 18B start engaging with the weft attachment storage surface 10 immediately after the start of weft insertion, and the weft attachment storage surface 10 immediately before the start of weft insertion.
It is spaced apart from 0.

A weft insertion main nozzle 20 that is operated in synchronization with the weft insertion timing is installed on the slay 19 in front of the weft length measuring device 4, and the weft yarn Y pulled out from the weft length measuring device 4 passes through the yarn guide 21. Main nozzle 20 for weft insertion via
The weft is introduced from the main weft insertion nozzle 20 into the weft guide path S formed by the rows of a large number of weft guide members 22 arranged in parallel on the slay 19.

Now, the weft Y that is ejected from the storage nozzle 13 at a predetermined speed
is sprayed onto the weft adhesion storage surface 10 on the drive roller 6 and is stored therein. Immediately before the start of weft insertion, the weft locking body 18A is attached to the weft adhesion storage surface 10 on the driven roller 7 side as shown in FIG. The weft retaining body 18B engages with and locks the stored weft Y, and the following weft retaining body 18B is close to the weft attachment and storage surface 10 on the drive roller 6 side. Immediately before the main weft insertion nozzle 20 is operated in synchronization with the weft insertion timing, the weft locking body 18A moves in the direction of arrow Q and separates from the weft attachment storage surface 10, and the weft locking is performed by the locking body 18A. is canceled. Immediately after that, the weft insertion main nozzle 20 is activated, and the arcuate concave weft attachment storage surface 1
The stored weft Y starts to be pulled out from 0. Immediately after the main nozzle 20 for weft insertion is activated, the weft locking body 18B starts to engage with the weft attachment storage surface 10 on the drive roller 6 side, and the stored weft Y in the same storage area is pulled onto the weft attachment storage surface 10. Press to lock. As shown in FIG.
The weft yarn Y stored between the weft yarn A and the weft yarn attachment storage surface 10
The pulling out of the stored weft Y is stopped by the weft locking action of the weft locking body 18B.

That is, the weft length for one weft insertion is made on the arcuate concave weft attachment storage surface 10 between the weft locking position by the weft locking body 18A and the weft yarn locking position by the following weft accumulation locking body 18B. The length of the weft is measured, and the measured weft is pulled out from the weft attachment storage surface 10 and inserted. Therefore, the weft pull-out resistance from the weft length measuring device 4 during the weft insertion period hardly changes, and the flying condition of the weft yarn flying in the weft guide path S is maintained in a good condition, thereby preventing weft insertion errors or errors. This prevents the weft tip from popping out from inside the guide path S.

Moreover, since the pull-out resistance of the stored weft from the weft attachment storage surface 10 is extremely small, it is possible to increase the flying speed of the weft Y and the weft propulsion force without increasing the injection pressure in the main nozzle 20 for weft insertion. , it is possible to cope with higher speeds of looms and wider widths of woven fabrics.

Following the completion of weft insertion, the weft locking body 18B locks the stored weft Y on the weft adhesion storage surface 10 while moving the weft yarn Y onto the weft adhesion storage surface 10.
At the same time, the beating operation is performed while moving toward the driven roller 7 side. Then, from the time when the weft locking body 18B moves to the engagement position with the weft attachment and storage surface lO of the weft locking body 18A shown in FIG. 1, the same weft insertion operation as described above is performed again.

In this embodiment, the time at which the weft locking body starts engaging with the weft attachment storage surface 10 is set immediately after the start of weft insertion, and the time at which the weft locking body is separated from the weft attachment and storage surface 10 is set immediately before the start of weft insertion. However, the timing at which the weft locking body starts engaging with the weft attachment storage surface 10 is delayed from immediately after the weft insertion start time within the range where the weft can be lengthened for one weft insertion on the weft attachment storage surface 10. Alternatively, it is possible to separate the weft thread locking body from the weft thread attachment storage surface 10 earlier than immediately before the weft insertion start time.

The present invention is, of course, not limited to the above-mentioned embodiments, but also includes embodiments shown in FIGS. 4 to 11, for example.

In the embodiment shown in FIGS. 4 and 5, the drive shaft 1 of the drive motor 14
A large number of mounting holes 15 are formed on the peripheral edge of the disc 15 fixed to the plate 4a.
a are provided at predetermined intervals, and weft thread locking bodies 18 are fitted into predetermined numbers of them at equal intervals and are tightened and fixed by nuts 24. That is, it is possible to measure the weft length according to the weaving width of the woven fabric by appropriately adjusting the interval between the weft locking bodies 18.

In the embodiment shown in FIG.
A weft pull-out resistance imparting member 25 is disposed in contact with or in close proximity to the weft attachment storage surface 10 on the front end side (weft pull-out side) of the yarn. ) is tightened and fixed with a screw 37 so that its position can be adjusted up and down. That is, an appropriate pulling resistance can be applied to the weft yarn Y pulled out from the weft attachment storage surface 10, and a weft tension can be applied depending on the yarn type or yarn count.

In the embodiment shown in FIG. 7, a ring-shaped weft pull-out resistance imparting member 39 having the same diameter as the disk 15 is disposed at the tip of the weft locking body 18 by being tightened and fixed with a nut 40. Appropriate pulling resistance is applied to the weft Y being pulled out from the weft attachment storage surface 10 while rotating integrally with the stopper 18.

In the embodiment shown in FIG. 8.9, teeth 41a are formed on the periphery of the disk 41 to which the weft locking body 18 is attached, and teeth 41a are formed on the rear end of the belt 42 forming the weft attachment storage surface 10. A row of engagement holes 42a that engage with the teeth 41a are formed. That is, the belt 42, which is rotatably supported by the rollers 43 and 44, travels by engagement with the rotating disc 41, allowing for a simplified mechanism.

In the embodiment shown in FIG. 10, as in the case of FIGS. 1 to 3, a belt 8 forming a weft adhesion storage surface 10 is hung between a drive roller 6 driven by a drive motor 11 and a driven roller 7. , is stretched so that its upper side has a planar shape. Then, a belt 30 stretched between a drive roller 28 and a driven roller 29, which are rotated in the opposite direction to the drive roller 6 by a drive motor 27 supported on the back surface of the support frame 5, is placed directly above the weft attachment and storage surface 10. A plurality of weft locking bodies 45 are fixed to the outer surface of the belt 30 at predetermined intervals. That is, when the weft locking body 45 moving on the circulation path of the belt 30 is introduced between the two belts 8.30, it engages on the weft attachment and storage surface 10, and the weft yarn retention on the attachment and storage surface 10. It is designed to lock Y.

In the embodiment shown in FIG. 11, a disk 31 rotated by a drive device (not shown) is rotatably supported by a fixed shaft 38, and a pair of weft thread hooks are provided at mutually opposite positions on the circumferential surface of the mounting cylinder 31a. Stop levers 32 and 33 are supported so as to be rotatable up and down. A cam 34 is fastened to the upper end of the fixed shaft 38 by a screw 35, and a weft locking lever 32.
Rotators 32a and 33a provided at the ends of the upper arms of the levers 32 and 33 are pressed onto the cam surface by a spring 36 suspended between the upper arms of both levers 32 and 33. Then, the lower arms of both yarn locking levers 32 and 33, which rotate together with the disk 31, engage with and separate from the weft attachment and storage surface 10, and the weft yarn is transferred from the storage nozzle 13 onto the weft attachment and storage surface 10. The operation of locking and releasing the ejected and deposited weft Y, that is, the weft length measurement is performed. Note that the number of weft locking levers may be three or more.

Effects of the Invention As detailed above, the weft length measuring device of the present invention engages the weft thread locking body on the weft adhesion storage surface that moves with respect to the storage nozzle that spouts the weft yarn, and separates it from the weft adhesion storage surface. Since the stored weft can be locked and released by using the weft storage surface, the length of the weft for one weft insertion can be measured on the weft adhesion storage surface, and fluctuations in the pull-out resistance of the weft yarn pulled out from the weft storage surface can be measured. This has the excellent effect of almost eliminating the problem of weft insertion and preventing the weft tip from popping out from inside the weft guide path.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment embodying the present invention, FIG. 2 is a perspective view showing changes from FIG. 1, FIG. FIG. 5 is a longitudinal sectional view of the main part, FIG. 6.7 is a perspective view showing an embodiment equipped with a weft pull-out resistance imparting member, and FIG. 8 is a weft attachment storage surface. FIG. 9 is a longitudinal cross-sectional view of the main part, FIG. 10 is a perspective view showing another example, and FIG. 11 is a disk-type weft length measuring device. FIG. Weft yarn length measuring device 4, weft attachment storage surface 10, storage nozzle 13
, the drive motor 14 constituting the weft locking mechanism, the same disk 15, the same pipe 16, the same (support wing 17, the same weft locking bodies 18, 18A, 18B, the weft Y yarn

Claims (1)

[Claims] 1. In a weft length measuring device equipped with a weft attachment storage surface that adheres and stores the weft ejected from the storage nozzle while moving relative to a storage nozzle that spouts out the weft, a weft locking body is moved together with the weft attachment storage surface. A weft length measuring device for a shuttleless loom, which is provided with a weft locking mechanism that engages with and separates from the weft adhesion storage surface at a predetermined time and repeats weft locking and release operations on the weft adhesion storage surface. .