JPS58214561A - Apparatus for cutting weft yarn of 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 The present invention relates to a weft cutting device for a shuttleless loom.

In shuttleless looms, the weft threads are cut on both sides of the woven fabric after weft insertion. That is, on the s-insertion side, the material is cut every time the weft is inserted, and on the opposite side, it is usually cut every 3 to 5 wefts. Traditionally, as this type of cutting device, a forging cutter has been used for air-jet looms, and a heat cutter for water-jet looms, but in recent years, the operating speed of looms has increased to 50 O
When speeds were increased to exceed r, p, and m, various problems began to occur for both of them. In other words, with a scissor-type cutter.

If the number of cuts is 500 times per minute, the scissors of the cutter will open and close 720,000 times in 24 hours a day.
"Backlash" may occur at the caulking part of the cutting blade.

Seizures often occur due to lack of oil, and the performance of the blade rapidly deteriorates because most of the cutting occurs at the same point on the blade. In addition, with a heat cutter, as the speed increases, the amount of water required for carving increases, which necessitates the use of a more refined cutter, increases energy consumption, and significantly reduces durability. Especially regarding water jet looms recently.

As part of expanding its versatility, the use of spun yarn for the weft yarn is currently being considered, but due to the generation of fluff and its high water absorption rate, there are many problems with the durability and performance of heat tartar. This is one of the factors that makes it difficult to use spun yarn as weft yarn.

In view of the above circumstances, the present invention provides a sudden injection type or
Can be used with any water jet type shuttleless loom.

The object of the present invention is to provide a weft thread cutting device that exhibits excellent effects in terms of performance, durability, and energy saving, regardless of the type of weft thread. .

That is, the present invention does not require installation within the reed beating path of the empty feather section provided in the bond insert measurement @ of the S-shuttle loom. Near the weft flight line, the weft flight line is lower than the weft flight line, slopes so as to exceed the height of the weft flight line in the vicinity of the wave layer advance position, and drops sharply near the wave layer advance position. A pair of parallel weft guides each having an upper edge for sliding the weft with a step for weft locking, and cutting the weft that is held by the pair of weft guides and is locked to the step of the weft guide. This is a weft cutting device for a shuttleless loom consisting of a circular rotary blade attached to the weft position.

Hereinafter, the configuration of the present invention will be described in detail based on examples. FIG. 1 is a perspective view showing the device of the present invention when it is attached to the weft insertion side of a shuttleless loom and locks weft threads.

These are the path drawn parallel to the empty feather part (warp α when beating the reed) on the reed pane on the cotton insertion side of the reed, and its extension.

The weft guide (1
), (1) are installed. Weft guide (1
), (1) maintains 9 equal intervals.

And the upper edges (2) and (2) are arranged in parallel with the same height.9. Applicable! (2) and (2) are completely isomorphic.

In the vicinity of the point where it intersects the flight line of the weft yarn (1) jetted from the nozzle (□□□), the weft thread (1) is lower than the flight line, but as it turns towards the direction of the weaving front where the reed 4 moves forward, it has an upwardly sloping shape. It became high, and the reed was 0.
Beyond the height of the flight line in the darkness until reaching the most advanced position,
The weft (Y) is pressed so that it can contact and slide on the upper edges (2), (2), and near the most advanced position of the weft (Y), the weft (Y) suddenly drops and becomes low. 1) Step for locking (
3) , form (3). Furthermore, weft guide (1
).

There is a one-step difference (3) between (1), a circular rotary blade (4) for cutting the weft (fl) held by (3), and the circular rotary The blade (4) is actively rotated by a mechanism (not shown) in conjunction with a crankshaft (not shown), and by replacing the pulley of the mechanism, the circular shape The rotation speed of the rotary blade (4) can be set freely.Also, the locking part (3), which is the weft cutting point, can be set freely.
).

On the opposite side of (3), there is a polisher (5) for polishing the nine circular rotary blade (4) while it is rotating. Yet again.

In order to best adjust the timing and weft tension when cutting the weft depending on the type of weft, weft guide (1),
(1) is moved back and forth in its length direction to create a one step difference (3).

(3) and the circular rotary blade (4) may be arranged at optimal positions. For that purpose, there is a long adjustment hole (6), (
6) is provided in the weft guides (1) and (1),
Weft guide (1).

<1) is screwed to the bracket (C) by a bolt (7) passing through the long holes (6) and (6).

The bracket [F]) is fixed to the loom in an appropriate manner,
ing. In addition, the weft cutting timing can be adjusted using a circular rotary blade (
It is also possible by changing the diameter of 4). In addition,
Depending on the type of weft yarn (Yl), it is necessary to further adjust the weft tension at the time of cutting to an appropriate tension in order to eliminate any uncut portion of the weft yarn (1). (1), (1) upper edge (2), (
2) and the auxiliary weft guide (1) having the upper edge (5) of the same prefecture and a step (5) for locking the weft (Yl), parallel to the weft guides (1) and (1), and The upper edge (2) of the weft guide (1), the upper edge (2) of (1), (2)
It is sometimes placed at the same height as the reed and between the reed and the nozzle. In this case, the installation of the auxiliary weft guide (f) is as follows:
A bolt (
7), fasten the screws to the bracket.

The device of the present invention has the above configuration.

The weft thread σ) inserted from the nozzle )
When moving forward in the weaving direction, the weft guide (1), (
1) upper edge (2).

(2) is sloped on the top, so the weft (Yl)
K comes into contact with and slides on the upper edge (2), <2), and K finally reaches the step (2) for locking the weft thread (σ) as shown in FIG.
3) Even if the reed 0 starts to move backward due to falling into and being locked by the reeds (3) and (3'), it will be secured by the steps (3) and (3) and will be reliably cut by the rotating contact of the circular rotary blade (4). The locking part will continue to loosen until it stops. Also, auxiliary weft guide (1)'
Even in the case of adding f
5 has a similar effect.

The weft cutting device of the present invention can be extremely easily and accurately adjusted to obtain the optimal timing and best tension when cutting the weft thread, so there are no cutting mistakes and the selvedge tightening is excellent. A woven fabric (F) can be obtained. In addition, even if the operating speed of the loom increases and the number of times the weft is cut increases, it is difficult to use a circular rotary blade (4), and it is difficult to use two cutting blades as in the case of an air-injection type cutting cutter. There was no rattling □ on the caulking part, and there was no oil leakage.
Since the cutting location of the blade is always changed and the blade can be constantly polished by the polisher (5), the performance of the blade can always be maintained at a good level. In addition, the device of the present invention achieves υ by increasing the speed.
If used in place of the heat cutter of a water-jet loom, which requires a larger size, significant energy-saving effects can be achieved. Yet again.

Even when used to cut weft yarns made of spun cotton yarn, etc., which generate a lot of fluff and have a high water absorption rate, there is no problem with the cutting performance or durability of the circular rotary blade (4).

For example, there are no cutting errors caused by MVc with fluff.

As mentioned above, the device of the present invention can be air type or water injection type! Cutting performance and durability no matter which machine is used.

In terms of energy saving, it is far superior to conventional forging cutters and heat cutters. Moreover, it is a weft cutting device for a shuttleless loom with a simple structure.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the main parts when the two devices of the present invention are installed on a shuttleless loom (J), and the weft is locked. (3), (3)...(1), (1) step, (4)・
...Enri rotary blade. (1) -゛°Auxiliary thread guide g3)...Bracket. (Y) - Weft, I') = - Warp. C11i''n・°・woven cloth, (c)... reed. ■°°° air wing part, (g))... injection nozzle. Patent applicant Unitika Co., Ltd.

Claims (1)

[Claims] (υ Installed within the reed beating path of the empty wing part provided at the reed end on the reed side of a shuttleless loom. The weft sliding thread slopes when it exceeds the height of the weft flight line before reaching the most advanced position, and drops suddenly near the most advanced position of the reed to form a step for weft locking. a pair of parallel weft guides having upper edges; and a circular rotary blade mounted at a position to cut the weft held by the pair of weft guides and stopped at the step of the weft guide. A weft cutting device for a shuttleless loom consisting of: