JPH0230466Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a weft storage device for a fluid jet loom.

(Prior art) In general, in a fluid jet loom, in order to minimize the weft pull-out resistance during weft insertion, a predetermined length of the weft fed from the yarn feeding bobbin is measured and stored each time weft is inserted. There is a need for this, and various devices have been proposed as such weft length measuring and storage devices. Typical methods include the so-called air pool method, in which the weft is continuously sent out by a length-measuring roller, and is ejected into a pool pipe by a pool nozzle and stored in a U-shape, and the weft is wound around the circumference of a drum to measure the length. A so-called drum pool type weft storage device is well known.

However, in the air pool method, the weft yarn is stored by the airflow, so when inserting the weft, the weft yarn must be pulled out against the storage airflow, resulting in an increase in weft insertion resistance. . Further, in the drum pool method, the weft wound around the circumferential surface of the drum causes ballooning during weft insertion, resulting in an increase in weft insertion resistance.

As a method for alleviating the increase in weft insertion resistance of the conventional apparatus as described above, there is a weft storage apparatus disclosed in, for example, Japanese Patent Laid-Open No. 57-95349. In this storage device, weft yarn is blown from a storage nozzle onto the outer surface of an air-permeable endless belt stretched by a driving roller and a driven roller, and the weft yarn blown onto the outer surface of the belt is blown onto the inner surface of the belt. It is suctioned onto the outer surface of the belt by a suction device provided on the side, and as the belt travels, it is deposited and deposited in a coil shape on the outer surface of the belt. With conventional devices configured in this way, the resistance when the weft is pulled out from the belt surface during weft insertion is small, and unlike the air pool type or drum pool type weft length measuring devices described above, the weft insertion resistance increases and compression occurs. Problems such as increased air consumption and the tendency for weft breakage to occur are resolved.

However, the conventional device described above requires a driving device such as a driving roller or a driven roller to rotate the belt for storing weft yarns in synchronization with the operation of the loom, and there is freedom in design due to the space and installation location. In addition, the belt must be moved at an accurate speed in order to improve the weft storage posture, but there is a problem in that the tension state of the belt must be precisely adjusted for this purpose.
Moreover, as belts stretch as they are used, they not only require periodic maintenance and adjustment, but also
In cases where belts are frequently used, such as in looms, there is also the problem that the belt has a short lifespan. Furthermore, the driving force for driving the belt is large, and the power consumption of the loom increases.

(Problems to be solved by the invention) The present invention has a complicated structure in the conventional device.
This solves the problem that it is difficult to make adjustments to improve the weft storage posture and reduce weft insertion resistance.

(Means for Solving the Problems) The present invention provides a weft storage member between a length measuring roller and a weft insertion nozzle that continuously pulls out weft yarns from a yarn feeding bobbin, and a storage member for storing weft yarns sent out from the length measuring roller. A pool nozzle that sprays water toward the weft storage surface is disposed, and a fluid interference member that gradually interferes with the fluid jetted from the pool nozzle is provided between the storage member and the pool nozzle.

(Function) In the present invention, during the weft storage period, the fluid jetted from the pool nozzle is not interfered with in the early stage of storage, so the weft is blown in the direction of the pool nozzle and sprayed onto the weft storage surface of the storage member. However, as the fluid interference member enters the region of the jetted fluid, the flow direction of the fluid jetted from the pool nozzle is gradually deflected toward the interference member, so the spraying position of the weft yarns similarly shifts. Weft yarns are stored on the storage surface over a predetermined length range.

(Example) The present invention will be described below based on the illustrated example. In FIG. 1, a yarn feeding bobbin 1 is disposed at a fixed position on the side of the loom, and the weft yarn Y of the yarn feeding bobbin 1 is pulled out by a known length measuring roller 3 via a guide 2. The length measuring roller 3 consists of a pair of rollers, including a drive roller that continuously rotates in synchronization with the loom and a driven roller that comes into pressure contact with the drive roller. The weft sent out from the length measuring roller 3 is passed through the pool nozzle 4
The storage surface 6 of the storage member 5 fixedly disposed in front of the pool nozzle 4 by the fluid injected from the pool nozzle 4
sprayed on. The storage member 5 has a storage surface 6 that is orthogonal to the central axis direction of the pool nozzle 4, and as can be seen from FIG. 2, the longitudinal direction of the storage surface 6 intersects the central axis direction of the pool nozzle 4 at a predetermined angle. It is arranged like this. Note that the relationship between the pool nozzle 4 and the storage member 5 is not limited to the above-mentioned configuration.
Various forms can be selected as necessary.
The storage surface 6 is composed of a member such as a moquette in which fibers or fibrous materials are planted, and the weft yarn sprayed by the pool nozzle 4 is caught between the fibers, and due to frictional resistance with them, the spraying position is adjusted. will be maintained. Note that the storage member 5 may be formed by other means, for example, a mesh member, and a suction device may be disposed behind the storage member 5 to attract and hold the weft threads by suction airflow.

An eccentric roller 9 is disposed as a rotating body between the pool nozzle 4 and the storage member 5, and is eccentrically fixed on a shaft 8 rotated by a driving means such as a belt 7. When the minimum eccentric distance of the eccentric roller 9 is located on the central axis side of the pool nozzle 4, the eccentric roller 9 is located outside the jetting fluid region of the pool nozzle so as not to interfere with the jetting fluid,
Further, the timing is adjusted so that weft storage is started in this state. Further, the eccentric roller 9 is configured so that when the maximum part of its eccentric distance is located on the central axis side of the pool nozzle 4, it almost coincides with the central axis.

The weft yarn stored in the storage surface 6 of the storage member 5 passes through a guide 10 and a known gripper 11 that determines the start and end timing of weft insertion, and then passes through a weft insertion nozzle 12.
reach. Further, in the embodiment, the direction in which the stored weft is pulled out is the storage longitudinal direction, but the pool nozzle 4, the storage member 5, and the weft insertion nozzle 12 may be arranged so as to draw out the stored weft in a direction that intersects with the storage longitudinal direction. It is possible.

The operation of the present invention configured as described above is explained in the second to
This will be explained with reference to FIG. In FIG. 2, the smallest part of the eccentric distance of the eccentric roller 9 faces toward the center axis of the pool nozzle 4, so the fluid jetted from the pool nozzle 4 flows without interference from the eccentric roller 9, and the weft Y The water is ejected linearly in the direction of the pool nozzle 4 and is sprayed onto the storage surface 6 of the storage member 5. At this time, weft insertion was completed and gripper 1
1 closes and pinches the weft, so the storage surface 6
Storage begins. FIG. 5 corresponds to FIG. 2 and shows the state at the start of storage. Next, when the eccentric roller 9 rotates and a part of it comes into contact with the ejected fluid area, the ejected fluid comes to go around the eccentric roller 9, and the fluid flow is caused to flow around the eccentric roller as shown in FIG. Since it is deflected to the 9 side, the weft blowing position also shifts in the same direction,
The weft yarns are stored with their phases shifted. Figure 6 shows the weft storage condition up to Figure 3.
It is a diagram. In addition, the reason why the weft yarn is stored in a meandering state in FIG. 6 is because the amount of weft yarn spraying is large relative to the speed of movement of the spraying position. In FIG. 4, the maximum eccentric distance of the eccentric roller 9 is the pool nozzle 4.
When facing toward the central axis of the jet, the fluid flow is changed to the maximum because it interferes most strongly with the jet fluid.
Along with this, the weft blowing position also shifts to the maximum from the storage start position, indicating a state where the weft storage period has ended. FIG. 7 shows a weft storage state corresponding to FIG. 4. As is clear from the above explanation, the weft yarn jetted from the pool nozzle 4 is stored in a meandering state over a distance L on the storage surface 6 of the storage member 5 due to the increased interference of the eccentric roller 9 with the jetted fluid. Ru. When the weft storage period ends in this way, the gripper 11 is opened, and the stored weft is started to be inserted by the weft insertion nozzle 12.

8 and 9 respectively show other embodiments. In order to further reduce the storage space for the weft yarns stored by the configuration of the above embodiment, the weft yarns injected from the pool nozzle 4 are actively It is designed to be sprayed and stored in a state where it is traversed.

That is, the embodiment shown in FIG. 8 has a guide tube 1 supported at the tip of a pool nozzle 4 by an elastic material 14 such as a spring.
3 is provided, and the guide tube 13 is driven by a cam 15 and connected to a rod 17 that is slidably guided up and down by a guide 16 to swing up and down as shown in the imaginary line to traverse the weft yarn. It is configured as follows.

FIG. 9 shows the pool nozzle 4 by swinging the storage plate 5 vertically as shown by the arrow by an appropriate driving means.
The structure is such that the same result as when the weft Y supplied from the weft Y is traversed is obtained.

FIG. 10 shows another embodiment of the present invention, in which a similar eccentric roller 20 is disposed on the opposite side of the eccentric roller 9 with respect to the center axis of the pool nozzle 4 in the embodiment shown in FIG. , both eccentric rollers 9,
20 is approximately 180 to the center axis of the pool nozzle 4
It is configured to be driven with a phase shift at each time. In this embodiment, the eccentric roller 20 acts on the fluid jetted from the pool nozzle 4 at the start of storage, and as in the case of the eccentric roller 9, the fluid is deflected to the eccentric roller 20 side, and the spraying position of the weft yarn Y is adjusted. Since it can be shifted toward the gripper 11 side, the weft storage area on the storage surface 6 can be moved to the first gripper 11 side.
L in the illustrated embodiment can be expanded to L+α.

FIGS. 11 and 12 show modified examples of the eccentric roller 9, and FIG. 10 shows an annular groove 18 carved on the circumferential surface of the eccentric roller 9 to improve the speed collection of the ejected fluid. can be increased. Further, FIG. 11 shows that by carving a meandering groove 19 on the circumferential surface of the eccentric roller 9, it is possible to give a slight vibration to the jetted fluid, and it is possible to make the stored weft yarn into a larger meandering state. .

In the above embodiment, a rotating body such as an eccentric roller is used as a member that gradually interferes with the jetted fluid, but in the present invention, another means is used as the interference member, for example, a rotating body that gradually approaches the central axis side of the pool nozzle. It is also possible to construct the reciprocating member.

(Effects) The present invention arranges a fluid interference member that gradually interferes with the fluid between a pool nozzle that sprays the weft with fluid and a storage member that is placed in front of the pool nozzle, and gradually deflects the weft with the fluid. Since the weft is stored, the weft can be stored in a good posture with an extremely simple structure, and the weft pulling resistance during weft insertion can be significantly reduced.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention. Fig. 1 is a schematic perspective view showing an embodiment of the invention, and Figs.
Schematic plan view showing the operating state of the illustrated embodiment, Nos. 5 to 7
The figures are a front view of the storage member showing the weft storage state corresponding to Figs. 2 to 4, respectively. Fig. 8 is an exploded schematic front view showing another embodiment. Fig. 9 is an unfolded schematic front view showing another embodiment. FIG. 10 is a schematic front view, FIG. 10 is a schematic plan view showing another embodiment, and FIGS. 11 and 12 are perspective views showing modified examples of the interference member. 1: yarn feeding bobbin, 3: length measuring roller, 4: pool nozzle, 5: storage member, 6: weft storage surface, 9: fluid interference member.

Claims (1)

[Scope of utility model registration request] In a fluid injection type loom, in which a predetermined amount of weft yarn is continuously drawn out from a yarn feeding bobbin fixedly provided on the side of the machine base, the weft yarn is inserted by a fluid jetted from a weft insertion nozzle after the weft yarn is stored in a predetermined amount. A pool nozzle that sprays the weft sent out from the weft storage member and the length measurement roller toward the weft storage surface of the storage member is disposed between the length measuring roller and the weft insertion nozzle that continuously pull out the weft from the yarn feeding bobbin. A weft storage device comprising: a fluid interference member that gradually interferes with the fluid jetted from the pool nozzle between the storage member and the pool nozzle.