JPS62299551A - Apparatus for measuring length of weft yarn and storing saidyarn 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 3. Detailed Description of the Invention Object of the Invention (Industrial Field of Application) The present invention provides a method for winding a weft yarn and locking and disengaging the weft yarn by an engagement and disengagement action between a black yarn winding surface forming body and a weft locking body. The present invention relates to a weft length measurement and storage device that controls length measurement and storage and withdrawal from the yarn winding surface.

(Prior art) As this type of weft length measuring and storage device, for example, JP-A-57-
There is a method disclosed in Japanese Patent No. 25444, in which the weft length is stored and the weft is pulled out from the thread winding surface by the engagement and disengagement action between the engagement hole on the thread winding surface formed by a plurality of divided pieces and the locking lever. is controlled. That is, the weft whose length is to be measured by being wound by the weft length measuring and storage device slides around the weft length measuring surface, which is an inclined surface, toward the locking lever side. withdrawal is blocked. The sliding performance of the weft measuring surface, which guides the transition of the winding yarn, determines the alignment state of the winding yarn, which affects the weft insertion state. Therefore, the entire surface of the divided piece forming the thread-wrapping surface is treated with alumite, Teflon coating, etc. to improve the sliding performance.

(Problem to be Solved by the Invention) The measured weft yarn is ejected from the main weft insertion nozzle into the warp opening, and after the weft insertion is finished, it is beaten to the front of the fabric. The gripping action of the upper and lower warp thread groups is already applied from the front. As a result, the weft, which is being held by the locking lever on the bobbin winding surface, is subjected to a tensile action by the reed beating while the fabric front side is being held, and this action causes the weft yarn to be held at approximately the same portion of the bobbin winding surface near the locking lever. The weft yarn vibrates and slides in the drawing direction every time it is beaten. As a result, groove-like wear damage occurs in the weft sliding area near the locking lever, and this groove-like wear area prevents the smooth pulling out of the weft yarn locked by the locking lever, leading to weft insertion errors. do. The wear damage occurs early on surfaces coated with alumite or Teflon for the purpose of improving sliding performance as described above.

Structure of the Invention (Means for Solving Problems) Therefore, in the present invention, the weft length measurement surface is stored and the weft length measurement surface is removed from the weft length measurement surface by the engagement and disengagement action between the weft length measurement surface forming body for winding the weft thread and the weft thread locking body. Targeting a winding-type weft length measuring storage device that controls draw-out, the slipping performance of the weft length measuring surface that slides and guides the wrapped weft to the weft locking body side and the wear damage described above are also considered. From this point of view, the weft locking surface corresponding to the weft portion in the drawing direction that is stopped by the weft locking body is formed of a wear-resistant material.

(Function) That is, by applying low friction treatment such as alumite or Teflon coating to the weft length measurement surface that slides and guides the wrapped weft toward the weft inserting stopper side, the wrapped weft can be transferred in an aligned manner. , there is no entanglement between wrapped wefts that would cause weft insertion errors. The wrapped weft that has been transferred in an orderly manner is prevented from being transferred by the weft locking body, and is released from the weft locking body when the weft insertion time comes. Due to the relationship between this control at each weft insertion and the beating action, the weft thread vibrates in the drawing direction on the weft thread stopping surface near the weft thread stopping body, and the weft thread in the drawing direction rubs the weft thread catching surface. However, since this weft thread locking surface is formed of a wear-resistant material, wear caused by vibrational sliding of the weft threads is prevented.

(Example) Hereinafter, an example embodying the present invention will be described based on the drawings.

As shown in Fig. 1, a rotary support shaft 3 is rotatably mounted through an annular bracket 2 fixed to a side frame 1 of 'l&n, and a weft yarn supply source such as cheese is supplied to the shaft center of the annular bracket 2. A weft guide hole 3a for guiding the weft Y is formed. A thread winding tube 4 is attached to the rotation support shaft 3 on the front side of the annular plug throat 2 (on the right side in FIG. 1) so as to communicate with the weft guide hole 3a, and its tip is connected to the thread winding surface described later. It opens nearby. Rotation support shaft 3
A support body 5 is supported so as to be relatively rotatable at the tip thereof, and a disk-shaped support plate 6 is fixed to the front surface of the support body 5 so as to be relatively rotatable with respect to the rotary support shaft 3 .

On the front peripheral edge of the support plate 6, there are four pincushion pieces 7, 8°9,
The IO is tightened and fixed to the support plate 6 so that its position can be adjusted approximately in the radial direction, and the first inclined surfaces 7a, 8 of each of the bobbin attachment pieces 7 to IO
a, 9a, 10a and second inclined surfaces 7b, 8b, 9b, 1
0b forms a thread winding surface. As shown in FIG. 2, a through hole 7C is formed in the thread wrapping piece 7 extending from the 11tJ slope 7a to the second slope 7b. This hole 7
The region S of the second inclined surface 7b connected to the front end of C is made of a wear-resistant material such as ceramic or chrome plating, and excluding the region S (the remaining thread-wrapping surface is made of a low-friction material such as alumite or Teflon coating). The thread wrapping surfaces of the other thread wrapping pieces 8 to 10 are made of the same low-friction material.The friction coefficient of the thread wrapping surfaces other than the area S varies depending on the type of weft used. For example, in the case of a yarn type that is difficult to slip, it is preferable to use a material made of a low-friction material, and in the case of a yarn type that is easily soaked, it is preferable to use a material made of a relatively high-friction material.

As shown in FIG. 3, a drive shaft 11 that rotates in synchronization with the machine base is arranged parallel to the rotation support shaft 3 on the side of the bobbin winding surface, and a timing pulley fixed to the drive shaft 11 12 and a timing pulley 13 fixed to the rotation support shaft 3 are operatively connected by a timing belt 14. A shaft 15 is disposed in parallel between the rotation support shaft 3 and the drive shaft 11, and a pair of cam levers 16 and 17 are rotatably supported at the position of the shaft 15 corresponding to the through hole 7c. A pair of cams 18 and 19 are fixed to the drive shaft 11. A pair of cam levers 16, 17 are pulled up and biased by tension springs 20, 21, and a rotating cam 18.
19, the cam lever 16.17 swings around the shaft 15, and the pair of weft locking bodies 22, 23 attached to the tip of the cam lever 16.17 enters and opens the through hole 7C. It is designed to be separated from 7C.

A cover 2 that covers the thread-wrapped tube 4 is provided on the front of the annular bracket 2.
4 is fixedly attached, and the support plate 6 is held stationary without rotating due to the attraction between the magnet 25 on the cover 24 side and the magnet 26 on the support plate 6 side.

Now, the cam lever 16.17 swings due to the action of the cam 18.19 which rotates in synchronization with the machine base, and the weft thread locking body 22.23 is inserted into the through hole 7C of the bobbin winding piece 7 every time the machine base rotates once. The process of entering and separating from the opening 7C is repeated. As a result, the measurement storage and withdrawal from the winding surface of the weft yarn Y, which is wound and supplied from the rotating yarn winding tube 4 to the first inclined surfaces 7a to 10a, is controlled, and a predetermined amount of the weft yarn Y is supplied from the weft insertion main nozzle (not shown). The weft yarn is inserted into the warp opening. First inclined surfaces 7a to 10
The weft yarn Y wound on the weft length measuring surface a is slid in an aligned state on the weft length measuring surface of low friction or high friction depending on the yarn type to the second weft locking body 23 side, It is locked by the second weft locking body 23. Therefore, the winding yarns are prevented from being pulled out in an aligned state by the second weft locking body 23, and the winding yarns do not become entangled with each other, which would cause a weft insertion error.

After the weft insertion is completed, beating is performed, and due to this beating operation, the weft portion extending from the weft locking body 23 in the drawing direction comes into contact with the region S of the second inclined surface 7b of the bobbin winding piece 7. It vibrates. However, since the region S is made of a wear-resistant material, even if the weft vibrates and slides for a long period of time against the weft locking surface, which is the second inclined surface 7b, the region S will have a negative effect on smooth weft withdrawal. There is no risk of such wear and tear, and a good weft insertion condition is achieved.

Of course, the present invention is not limited to the above-mentioned embodiment, but for example, the region S portion of the above-mentioned embodiment can be configured to be replaceable, and can be matched according to the type of weft while satisfying wear resistance against vibration and sliding of the weft. It is also possible to choose wear-resistant materials. In this way, even if non-negligible wear damage occurs in the region S, it can be dealt with.

In addition, when a thread wrapping surface is formed by a plurality of bobbin wrapping pieces 7 to 10 as in the illustrated embodiment, the entire bobbin wrapping piece 7 or the entire surface area on which the weft locking body acts is made to have sufficient abrasion resistance. It may be formed into a state. Furthermore, the present invention provides a weft length measurement and storage device in which a thread winding surface is formed by an integrated drum, a weft length measurement and storage device in which weft length measurement storage and withdrawal control is performed by a single weft locking body, and a weft length measurement and storage device in which the thread winding surface side is It can be used in a weft length measurement and storage device that rotates and winds up the weft.

Effects of the Invention As detailed above, in the present invention, the weft locking surface that receives the frictional action of the weft is formed of a material that passes through it, so that the storage and withdrawal of weft length measurements can be smoothly controlled and a good weft can be obtained. It has the excellent effect of achieving a state of being put in.

[Brief explanation of drawings]

The drawings show an embodiment embodying the present invention; FIG. 1 is a side sectional view, FIG. 2 is a plan view of the main part, and FIG. 3 is a front view. A thread winding piece 7 as a thread winding surface forming body, a first inclined surface 7a as a weft length measuring surface, and a second inclined surface 7b as a weft locking surface.
, weft locking body 23, region S, cotton weft.

Claims (1)

[Claims] 1. In a weft length measurement storage device that controls the storage of weft length measurement and the withdrawal from the weft length measurement surface by the engagement and disengagement between the weft length measurement surface forming body for winding the weft and the weft locking body, the weft locking body A weft length measuring and storage device for a shuttleless loom, in which a weft locking surface corresponding to the weft portion in the drawing direction that is stopped by is formed of a wear-resistant material.