JPH0634382Y2 - Residual yarn processing device on drum of weft measuring and storing device - Google Patents

Description

[Detailed Description of the Invention] << Industrial Application Field >> This invention is a weft guide device for a cutter, and more specifically, for example, when a weft breakage from the yarn feeder to the main nozzle occurs, a new weft The present invention relates to a device that cuts and discharges the residual yarn on the weft measuring and storing drum prior to automatically inserting it into the main nozzle.

<< Prior art and its problems >> When a weft breakage occurs between the yarn feeder and the main nozzle, a new weft as disclosed in, for example, JP-A-62-57969 is automatically inserted into the main nozzle. There is a weft repair device.

In the automatic repair device here, when a weft breakage occurs, the loom is stopped by the feeler detection, but since the stored weft remains on the weft measuring storage drum, the cutter is on the drum. The weft yarn bundle (hereinafter referred to as "residual yarn") wound around the yarn is advanced in a direction intersecting with the weft yarn bundle to cut the residual yarn, and the residual yarn is discharged by a suction tube which is also advanced.

By the way, at the time of yarn breakage, the tension of the weft yarn wound on the length measuring storage drum is reduced and the winding width is widened. This is particularly noticeable in a length measurement storage device of the type in which wefts for a plurality of picks are wound and stored.

Therefore, when trying to match the cutter and suction tube of the automatic repair device with the winding width of the residual yarn to be cut, the opening amount of the cutter and the stroke of the movable blade are set to be large, and the cut residual yarn is sucked. It is necessary to set the opening of the suction pipe to be large, which is not preferable in terms of the mechanical arrangement, and the residual yarn is not cut so reliably, and the residual yarn remains on the drum of the length measurement storage device. Therefore, there is an inconvenience that automatic repair becomes impossible.

<Purpose of Invention> This invention was proposed in view of the above facts. For example, even if the opening amount of the cutter and the opening portion of the suction tube are not set large, or the stroke of the movable blade is not set large, for example, weft measurement is performed. An object of the present invention is to provide a yarn guide device that surely guides and cuts a residual yarn wound around a long storage device to a cutter and guides the residual yarn to a suction pipe for suction discharge.

<Basic configuration of device> Therefore, in this device, a cutter provided so as to be able to move forward and backward in a direction intersecting with the residual yarn on the storage drum, and a cutter provided in the vicinity of the cutter and in the same opening direction as the cutter. The guide member having an opening in the direction and a suction tube having an opening in the vicinity of the cutter action area, the opening member of the guide member is projected from the tip of the cutter, and the opening width of the opening is set to the tip of the cutter. The gist is that the opening width of the opening of the guide member at the position of the tip of the cutter is not more than the opening width of the cutter at the same position.

<Example> In this example, as shown in Figs. 1 and 3, a cutter 3 is provided via a holder 2 in the vicinity of the tip of a suction tube 1 that advances toward the drum D when cutting the weft. Suction tube 1
The cutter 3 is, for example, an air cylinder as shown in FIG.
21 and 23 move to the cutting suction position. The air cylinder 21 is attached to the stay 8, and its cylinder rod is connected to a bracket 12 penetrating the rail 10. The air cylinder 23 is attached to the bracket 12, and its cylinder rod is connected to the holder 2. The operation of the cutter 3 in this embodiment is configured to be performed by the air cylinder 25. The cutter 3 is given a pressure between the movable blade and the fixed blade by a leaf spring 14, and both are attached to a pin 16 implanted in the suction tube 1.

Further, at a position downstream of the cutter 3 in the weft winding direction, a pin 16 is provided with a yarn guide member 5 close to the cutter 3. The thread guiding member 5 has an opening in the same direction as the opening of the cutter 3, and the tip of the opening projects from the tip of the cutter 3, and the opening amount is larger than the opening amount of the tip of the cutter 3. The opening width of the opening is large and is less than or equal to the opening width of the cutter at the same position. The opening is formed by ridge lines 5a and 5b which converge toward the fulcrum of the cutter 3 in the working area of the cutter 3. At the upstream side of the cutter 3 in the weft winding direction, a suction pipe 1 for squeezing the residual yarn Z on the drum cut by the cutter is juxtaposed to the cutter 3. The opening of the suction pipe 1 is provided in the vicinity of the working area of the cutter 3 and at a position facing the residual yarn Z on the drum, and is formed to be larger than at least the opening amount of the cutter in the working area of the cutter 3. There is.

<Operation of Device> When a yarn breakage occurs, for example, between the drum D and the main nozzle (not shown) during weft yarn feeding, the sensor detects the yarn breakage and stops the loom. At this time, as shown in FIG. 2, the locking pin P of the drum D remains in the state of advancing toward the peripheral surface of the drum D so that the weft thread on the peripheral surface of the drum is not unwound. At the same time, the yarn guide G of the drum D stops at a position facing the suction tube 1. At the same time, the suction tube 1 starts suction.
After that, as shown in FIG. 3, the suction pipe 1 is driven toward the peripheral surface of the drum D by being driven by the air cylinders 21 and 23, and when it reaches a predetermined position, the suction pipe becomes the residual yarn Z wound around the drum D. It abuts and increases the thread tension to facilitate the cutting by the cutter 3. The residual thread on the drum D spreads in the axial direction of the drum over several winds, but since the opening amount of the thread guide member 5 is larger than the winding width of the residual thread Z, the suction tube When 1 advances, the yarn guide member 5 engages with the residual yarn Z, and since the opening of the yarn guide member 5 is smaller than the opening amount of the cutter 3 at the tip of the cutter 3, the residual yarn Z is cut. It guides to the working area of the cutter 3 while sliding on the ridge lines 5a and 5b without catching on the tip of the cutter 3 and converging. After that, the cutter 3 acts to cut the residual yarn Z.

According to the above-mentioned embodiment, the cutter 3 is connected to the suction pipe 1 via the holder 2, but the invention is not limited to this, and the cutter 1 and the suction pipe 1 are not integrated but separated. It can also be applied to

Further, it goes without saying that the present invention can be applied not only to the guide of the residual yarn to the cutter in the automatic repair device but also to all the cases where the yarn bundle needs to be guided to the cutter.

<< Effect of the Invention >> According to this invention, the residual thread Z wound around the drum D in the axial direction by several winds can be reliably guided to the cutter operation area while being converged by the thread guide member. Since the yarn Z can be reliably cut, and the opening of the suction pipe is provided in the vicinity of the working area of the cutter and at a position facing the residual yarn Z to be cut, the opening can be narrowed. Therefore, the suction force of the suction tube is strengthened, and the cut residual thread Z can be reliably transferred to the discharge step of the subsequent suction tube.

Further, if the opening of the yarn guide member is further converged in the working area of the cutter, the guided residual thread Z is collected in the working area, so that more reliable cutting can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 3 are a side enlarged view, a side view and a front enlarged view showing the periphery of a weft guide device for a cutter according to the present invention. 1 ... Suction tube, 3 ... Cutter 5 ... Guide member

Claims (1)

[Scope of utility model registration request] 1. A cutter provided so as to be capable of advancing and retracting in a direction intersecting with a residual yarn on a storage drum, and a guide member provided in the vicinity of the cutter and having an opening in the same direction as the opening direction of the cutter. , A suction pipe having an opening is provided in the vicinity of the working area of the cutter, the opening of the guide member projects from the tip of the cutter, and the opening width of the opening is larger than the opening width of the tip of the cutter. A residual yarn processing device on a drum of a weft measuring and storing device, which is large and has an opening width of an opening of a guide member at a position of a tip of a cutter which is equal to or smaller than an opening width of a cutter at the same position.