JPH0220224Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention is designed to eliminate weaving scratches caused by misexplosion of wefts in fragment looms that sequentially weave a plurality of different fragment wefts to weave flowers, tatami mats, etc. This relates to a device that prevents this without stopping the loom.

<Prior Art> Various methods have been used in the past to stop weaving and eliminate weaving flaws when a weft misfire occurs. For example, in bag weaving using a piece loom equipped with a single stitch device, four weft strips are repeatedly woven, but if one of the weft strips fails, the loom is stopped by the dry stitch prevention mechanism. The method was to manually rotate the loom to remove the three weft strips, and then restart the loom. Recently, even if a weft fails, one or more wefts that go around to the next same weft are forced to fail, and weaving continues without stopping the loom. It has been proposed (Utility Model Publication No. 59-189884, Japanese Patent Application Publication No. 59-26557, etc.). For example, a method such as installing a shielding plate at the entrance of the latspa to prevent the latitudinal rays from entering the latitudinal passage.

<Problem that the invention aims to solve> However, even if there is an unexploded weft strip and it is detected by the single stitching device, the next weft strip to be woven is already before being sent to the injection roll, so the injection cannot be stopped. Therefore, in order to prevent the weft stripes from being woven in, as mentioned above, it is possible to install a shielding plate at the weft opening to prevent the weft strips ejected by the injection roll from entering the weft channel, or to remove them with a removal machine. Although these methods have been proposed and put into practice, they have the disadvantage that the ends of the latitudinal rays obstruct the latitudinal passage because they clog the front of the latspa mouth or fold up the latitudinal rays to form a bent state.

<Means for solving the problem> The present invention solves the above-mentioned difficulties, and even if a misfire occurs in the weft that is being continuously injected at high speed, the next injection will not be carried out. Weaving damage can be prevented by not allowing the weft strips to be ejected into the weft path, and by making the following weft strips unexploded for an arbitrary number of times that the pattern goes around, and by weaving the weft strips from the beginning of the next cycle. This is a weaving damage prevention device with a new structure that operates stably when applied to the method. The structure is such that the weft strips are cut along the lower frame of the distribution plate 10 of each weft strip and fed to the injection roll position.
It is characterized in that the cutting blade 11 is provided so as to be operated by a solenoid 12.

<Operation> The device described above detects the presence of an unexploded weft strip and activates the solenoid, and immediately before the weft strip scheduled to be injected next to the unexploded weft strip is sent to the injection roll, the solenoid is activated. About 10cm short of the part that comes in contact with
Cut it with either the left or right blade of the cutting blade to shorten it and prevent it from ejecting into the latitude. After that, a known method, such as a jill guard mechanism or a ratchet mechanism, is used to eliminate one cycle of unexploded wefts, and the weft is woven from the same type of weft as the unexploded weft.

<Examples> Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a side view of a fragmentary loom equipped with the weaving flaw prevention device of the present invention. FIG. 2 is an enlarged side view of the weft supply device showing how the cutting blades are arranged, and FIG. 3 is a front view of the main part.

This fragment loom has two weft strips on the left and right sides of the loom main body 1 so that weaving can be performed using a plurality of different weft strips.
A weft supply device 3 is provided that enables selective weaving of a to 2d. In order to select these wefts, a plurality of selection cams 4 are provided on the main body of the device, and a cam rod 5 that swings by touching the cam rod and a selection rod 6 that is connected approximately at right angles to the cam rod,
The needle levers 8a to 8d provided below the weft guide grooves 7a to 7d of the weft supply device 3 are operated, and the wefts 2a to 2d are moved one by one by the feeding claws 14 to the injection roll 9 and then to the ratchet. This is a conventionally known structure for feeding the liquid to the mouth 19.

In the present invention, in such a fragment loom, at the center of the distribution plate 10 provided in the supply device 3 for each weft,
In addition, at a position where the weft strips 2a to 2d that are sent along the lower frame of the distribution plate to the injection roll position are cut,
The cutting blade 11 is operated by a solenoid 12 to be lowered. The illustrated cutting blade 11 has a structure with blades on both sides, and is attached to a solenoid by a vertically moving rod 13. When the cutting blade 11 is lowered, the weft strip sent to the injection roll 9 by the feed claw 14 is cut in front of it. An example of the shape of the feed pawl 14 is shown in FIG. Two feed claws 14,1
4 swings via the branching rod 16 and the transmission rods 17 and 18 at the central fulcrum by the rotation of the feed cam 15 located below the main body of the apparatus, and sends the weft strips in the direction of the injection roll 9.

The cutting blade 11 is operated by a solenoid 12, and for this purpose, a known empty puncture sensing mechanism (not shown) (for example, Japanese Patent Publication No. 17986/1986) is used to detect the operation of the cutting blade 11 using a solenoid 12. The misfiring signal is sent to the control circuit and converted into an activation signal for the solenoid 12. As a result, as mentioned above, just before the weft strip scheduled to be injected next to the unexploded weft strip is sent to the injection roll by the feed pawl 14, the short part of the weft strip that contacts the injection roll is about 10 cm. is cut with either the right or left blade of the cutting blade 11 to shorten the weft strips and prevent them from ejecting into the weft lanes. The feed pawl 14 is divided into four strips as shown in FIG.
4d completes the feed of the weft strip 2, and the inner feed claw 1
4b and 14c fit into the front and back sides of the cutting blade 11,
It functions as a feed pawl and at the same time as a cutting guide.
The cut end weft strip falls downward, and the remaining weft strips accumulate on the gutter of the weft strip supply device together with the original defective short weft strips. At this time, the control circuit counts the number of weft lines that stop injection at the same time, and
Injections equal to the number of cycles are considered to be misfires. As for this non-explosion means, various conventionally known methods can be adopted.

<Effect of the invention> The weaving damage prevention device in the fragment loom having the above structure is capable of completely removing from the weft the weft that is scheduled to be ejected next to the weft when a weft fails to eject. As a result, secondary troubles such as clogging the front of the latspa mouth or obstructing the latitudinal passage do not occur. Therefore, weaving damage can be completely prevented, and repairs can be made automatically in the event of a misfire without stopping the machine. This allows high-quality products to be obtained with high efficiency.

[Brief explanation of the drawing]

FIG. 1 is a side view of a fragmentary loom equipped with the weaving flaw prevention device of the present invention. FIG. 2 is an enlarged side view of the weft supply device showing how the cutting blades are arranged, and FIG. 3 is a front view of the main part. 3... Weft supply device, 9... Injection roll, 10
... Distribution plate, 11 ... Cutting blade, 12 ... Solenoid, 13 ... Vertical movement rod.

Claims (1)

[Scope of utility model registration request] In a fragmentary loom that weaves using two or more different weft strips, a solenoid 12 is used to set a cutting blade 11 at a position for cutting the weft strips that are fed to the injection roll position along the lower frame of the distribution plate 10 of each weft strip. A weaving flaw prevention device for a piece loom, characterized in that it is provided to be operated.