JPS5925888Y2 - Auxiliary fluid injection device in jettrum - Google Patents

Description

[Detailed description of the invention] This invention generally relates to a weft insertion device in a jet loom that performs weft insertion using compressed air.In particular, in addition to the main nozzle that injects compressed air, this invention injects auxiliary compressed air. This invention relates to a weft insertion device equipped with an auxiliary nozzle for

As shown in FIG. 1, the reed of such a weft insertion device has a recess or guide path 1a on each board 1 that opens toward the weaving front side (temple 3 side) for guiding the fluid and weft thread used during weft insertion. Deformed reeds are common.

Weft insertion is carried out by causing the weft yarns 6 to fly within the recessed portion 1a of the modified reed by means of a fluid jet from the main nozzle 5, and inserting the weft yarns into the opening or shed of the warp yarns 4.

Since the jet fluid from the main nozzle 5 alone is insufficient to cover the long distance on the flight side of the weft yarn 6, and it is not possible to obtain a stable flight state of the weft yarn 6, multiple auxiliary nozzles 2 (for simplicity, 1
(only one of which is shown) is provided along the weft running direction to guide the weft thread 6 along the recess 1a with the aid of their jet fluid 2'.

In the weft inserting device shown in Fig. 1, during weft insertion, the weft threads fly through the recess 1a provided in the reed, and during reed beating, the reed moves to the weaving front side together with the auxiliary nozzle 2 and reaches the deepest part of the recess 1a. A beating is held.

The reed is a consumable item because the weft is beaten repeatedly, and its lifespan is not permanent and it is necessary to replace it with a new one at certain intervals.

Naturally, the manufacturing cost of a modified reed as shown in FIG. 1 is considerably higher than that of a normal straight reed, and the operating cost of the loom is also higher.

This and other drawbacks (Japanese Patent Application No. 52-112729 (Japanese Unexamined Patent Publication No. 54-46960) filed by the same applicant as the present application)
A weft inserting device capable of solving the problem (described in detail in the above publication) is shown in FIGS. 2 to 4.

In the weft inserting apparatus shown in FIGS. 2 and 3, the reed is composed of a main reed 1A that is a normal straight reed, and an auxiliary reed 1B that is a modified reed in which the above-mentioned recess or guide path 1a is formed.
An auxiliary nozzle 2 is arranged on the weaving front side of the auxiliary reed 1B.

These members IA, IB and 2 are attached to the sleigh 7 in the usual manner, and when inserting the weft, the sleigh 7 is in the position shown by the solid line in FIG. Weft insertion is performed by flying due to the action of the jet fluid from the auxiliary nozzle 2, and during beating, the sled 7 is placed in the third position.
The auxiliary reed 1B is rotated to the position shown by the chain line in the figure and comes out of the warp shedding, and beating by the main flow 1A is performed.

8 is a conduit that supplies compressed air to the auxiliary nozzle 2.

In the weft insertion device shown in Fig. 4, an auxiliary nozzle 2 is arranged between the main stream 1A and the auxiliary stream 1B, and the four parts 1a provided in the auxiliary stream 1B are open to the main stream side rather than to the front side. Except for this, it may be considered that the weft insertion device is substantially the same as the weft insertion device shown in FIG.

Furthermore, as mentioned above, there is a weft insertion device that is shown in Japanese Patent Publication No. 35-10224 as a guide path formed by an auxiliary flow separate from the main flow, and a weft insertion device that combines this with an auxiliary nozzle. For example, in the weft inserting device using the above-mentioned auxiliary flow and auxiliary nozzle, which has the configuration shown in JP-A-47-7576 and JP-A-51-109366, it is clear from FIG. As described above, it is necessary to put the auxiliary nozzle 2 together with the auxiliary flow 1B into the weft opening for weft insertion, and to take it out from the warp opening for beating.

In this type of weft insertion device, when the auxiliary flow and auxiliary nozzle for weft insertion enter the warp opening, they each independently push and separate the lower warp threads, resulting in the following: This results in a problem that seriously impedes the weft insertion function as described in .

That is, for example, in the weft inserting device shown in FIGS. 2 to 4,
The lower warp threads 4 pushed apart by the top of each board of the auxiliary stream 1B are then pushed apart by the top of the auxiliary nozzle 2, but at this time, a portion of the warp threads 4 are pushed apart by the auxiliary flow teeth. There are many cases where the auxiliary nozzle 2 pushes the particles in the opposite direction.

This phenomenon similarly occurs even if the auxiliary nozzle 2 is longer than the auxiliary flow 1B.

For this reason, the warp threads 4 get caught on the surface forming the guide path 1a of the auxiliary flow tooth, causing a delay in the opening of some of the warp threads, or in the worst case, the warp threads 4 ride on the guide path 1a, and in this state, the weft As a result of the insertion, the flying weft comes into contact with the warp in the abnormal state, resulting in a weft insertion error.

Further, when the warp threads 4 are in an abnormal state as described above, excessive tension is applied to the warp threads.1. This results in a situation where the warp threads break.

The purpose of this invention is to eliminate the drawbacks of the conventional device.The purpose of this invention is to form a weft guide path by an auxiliary flow separate from the reed, and to inject fluid from an auxiliary nozzle arranged in the weft insertion direction in this guide path. To enable a weft insertion device that inserts wefts to smoothly push the warp threads apart without causing any abnormality in the opening state of the warp threads when an auxiliary flow and an auxiliary nozzle enter the warp thread opening. .

For the above-mentioned purpose, the auxiliary fluid injection device for a jet loom according to this invention has a guide path extending in the weft insertion direction along the reed, and during weft insertion, the weft yarn is caused to fly through the guide path by jetting fluid from the main nozzle. In order to inject an auxiliary fluid to help the weft fly, a plurality of auxiliary nozzles are arranged at predetermined intervals in the weft insertion direction at positions corresponding to the guide path, and the tip side of each auxiliary nozzle is sharpened, The top end of the auxiliary nozzle is formed to be thinner than the thickness in the weft insertion direction of a single auxiliary flow tooth, and the auxiliary nozzle is arranged so that its top end is located within the thickness of the single auxiliary flow tooth in the weft insertion direction. This feature allows the warp yarns to be smoothly pushed apart when the auxiliary flow and the auxiliary nozzle enter the warp opening.

Therefore, the auxiliary nozzle is easily inserted into the warp opening.

The invention will become more readily apparent from the following description of a preferred embodiment, shown by way of example only in the accompanying drawings.

5 to 7 are diagrams showing an embodiment in which this invention is applied to the weft insertion device of the type shown in FIG. 4, but this invention is not limited to this type of weft insertion device. .

For example, the present invention can be applied to a weft insertion device constructed by a combination of the illustrated auxiliary nozzle and a known auxiliary flow in the form of a guide path.

FIG. 5 corresponds to a view seen from the guide path 1a side of the auxiliary flow 1B excluding the main flow 1A in FIG.

As is clear from FIG. 7, the auxiliary nozzle 2 has an elongated oval shape in the direction of warp thread progression, and its apex 2a is wedge-shaped and sharpened.

The top edge 2b of the wedge 2a extends perpendicularly to the weft traveling direction (indicated by an arrow) when viewed from above as shown in FIG.

Furthermore, the auxiliary nozzle 2 is arranged corresponding to the auxiliary board so that the top end 2a is located within the thickness in the weft insertion direction of a single auxiliary flow tooth constituting the auxiliary flow 1B.

Further, among the surfaces forming the wedge 2a, an opening 2 for injecting the auxiliary fluid is provided on the surface 2C on the downstream side with respect to the weft traveling direction.
d is drilled.

The opening 2d is adapted to direct the auxiliary fluid exiting therefrom into the guide path 1a formed by the downstream auxiliary flow tooth.

In order to perform weft insertion, the present invention configured as described above,
For example, when moving from the virtual line to the position of the solid line in Fig. 3 and entering the warp opening, each auxiliary flow control pushes the lower warp apart, and then the warp auxiliary nozzle 2 that has been pushed apart pushes it apart. However, since the apex 2a of the auxiliary nozzle 2 is located within the thickness of the corresponding auxiliary thread in the weft insertion direction, the apex 2a enters into the space of the warp pushed apart by the auxiliary thread. Therefore, the warp thread 4 is
As shown by the solid line in the figure, the auxiliary nozzle 2 also pushes the warp threads apart in the same direction as the direction in which they are pushed apart by the auxiliary flow control, so that the warp threads 4 do not intertwine as shown by the imaginary line.

In addition, when implementing the present invention, in order to further reduce the influence on the warp threads, the center line of the auxiliary flow control closest to the auxiliary nozzle (in the warp direction) and the same center line of the auxiliary nozzle are aligned as shown in the figure. Alternatively, the upper curved portion 1b forming the guide path 1a for the handling teeth of the auxiliary liquid 1B, whose center line coincides with that of the auxiliary nozzle, may be configured to slightly overlap the top end of the auxiliary nozzle 2.

Furthermore, in the embodiment described above, the wedge-shaped formation was described as a means for sharpening the top end 2a of the auxiliary nozzle 2, but the present invention is not limited to such a state, and for example, the top end 2a of the auxiliary nozzle 2 is It is also possible to use other means, such as forming the tip into a pointed shape.

Further, the auxiliary nozzle 2 does not necessarily have to be oval in plan view, and the present invention can be configured with a circular or other shape.

However, when the auxiliary nozzle 2 is formed into an oval shape when viewed in plan as shown in FIG. 7, and the length in the weft direction in the cross section of the auxiliary nozzle 2 is formed to be smaller than the length in the warp direction. can further produce the effects described below.

Generally, a shed has a triangular shape formed by the upper and lower warps and the reed, but the distance between the upper and lower warps becomes longer at a position closer to the reed, and if weft insertion is performed at this position, the opening of the warp is insufficient. This position is an advantageous position for skipping the weft threads, as the effect will not affect the weft threads even in such a case.

However, when using a modified version as in the weft inserter shown in Figure 1, or when using the auxiliary liquid near the main stream as in the weft inserter shown in Figures 2 to 4, the auxiliary nozzle must be placed in the recess. Alternatively, it is desirable to install it as close as possible to the guide path in terms of weft conveyance.

However, since the auxiliary nozzle needs to inject a sufficient amount of air to assist the weft conveyance, its diameter needs to be a certain size, and for this reason, the thickness in the weft insertion direction of the auxiliary flow adjustment is particularly large. If it is smaller than that of the auxiliary nozzle 2 or if the auxiliary nozzle 2 is brought closer to the main liquid, various problems will occur.

FIG. 8 is a partially enlarged cross-sectional view of the weft insertion device shown in FIG. 4, for example, taken along a horizontal plane passing through the guide path 1a in the auxiliary liquid 1B.
As can be seen from this figure, it is desirable for the auxiliary nozzle 2 to be placed as close to the guide path 1a as possible, and its cross section is circular and its diameter is considerably larger than the reed pitch P of the main liquid 1A and the auxiliary liquid 1B. As a result, the distance between the next handling tooth and the next handling tooth becomes narrower, and the warp threads pass between them, so that a considerably excessive force is applied to the warp threads 4, causing them to undergo sudden bending.

As a result, the fluff of the warp threads is transferred, causing meridian entanglement,
This results in defective opening of the shed, which prevents normal weft insertion.

As a result, the warp threads are cut and the efficient operation of the machine is hindered.

In addition, since abnormal tension is applied to the warp yarns, warp occurs in the woven cloth, which deteriorates the feel and texture of the cloth.

In the case of the aforementioned oval-shaped auxiliary nozzle 2, interference with the warp threads next to it is minimized, so that the warp threads are not affected as described above.

In other words, by sharpening the auxiliary flow side, the gap between the auxiliary flow control and the auxiliary nozzle adjacent to the auxiliary flow control and the auxiliary nozzle are By making the main stream side sharper, the gap between the main teeth and the main tooth can be widened, so the auxiliary liquid guide path and the auxiliary nozzle can be moved closer to the main stream. Since it can be installed at the same time, weft insertion errors can be reduced and stable weaving can be performed! In addition, although the pitch of the reed teeth of the main liquid and the auxiliary liquid are generally different, even if the pitch of the auxiliary flow adjustment is narrowed to be equal to the pitch of the main tooth, and the auxiliary nozzle is brought into contact with the auxiliary liquid, the auxiliary nozzle Since the auxiliary flow side is sharp, the warp threads smoothly pass through the gap between the auxiliary nozzle and the auxiliary flow control, and no fluffing of the warp threads occurs.

Alternatively, the auxiliary nozzle may be brought into contact with or integrally formed with the auxiliary flow control, as shown by dotted lines 9 in FIG.

As described above, the present invention sharpens the tip side of the auxiliary nozzle so that its apex is thinner than the thickness in the weft insertion direction of a single auxiliary board; By arranging the auxiliary reed and the auxiliary nozzle in accordance with the same flow adjustment so as to be located within the thickness in the insertion direction, when the auxiliary reed and the auxiliary nozzle enter the warp opening during weft insertion, the warp threads are placed between the auxiliary nozzle and the corresponding auxiliary thread. Since the warp threads are reliably pushed in the same direction by the auxiliary nozzle and the auxiliary board text, and there is no phenomenon in which some of the warp threads intersect between the auxiliary nozzle and the auxiliary board text, an accurate shedding state can be obtained, and as a result, the warp threads are pushed apart in the same direction. It is possible to eliminate problems such as errors in weft insertion due to defects and warp breakage due to excessive tension.

[Brief explanation of the drawing]

1 and 2 are perspective views showing different types of weft insertion devices to which this invention can be applied, FIG. 5 is a schematic front view of the weft inserting device according to the invention, FIG. 6 is a left side view of FIG. 5, FIG. 7 is a plan view of FIG. 6, and FIG. FIG. 7 is a diagram corresponding to FIG. 7 of a conventional weft insertion device. In the figure, 1A is the main liquid, 1B is the auxiliary reed, 1a is the guide path, 2 is the auxiliary nozzle, 2a is the top end of the auxiliary nozzle, 4 is the warp, 5 is the main nozzle, and 6 is the weft.

Claims (1)

[Scope of utility model registration request] A plurality of auxiliary boards forming a guide path extending in the weft insertion direction along the reed are provided, and a plurality of auxiliary nozzles are arranged at predetermined intervals in the weft insertion direction at positions corresponding to the guide paths,
In a jet loom in which the weft yarn is caused to fly through the guide path by fluid jetted from the main nozzle and the weft yarn is made to fly by the auxiliary fluid jetted from the auxiliary nozzle, the tip side of each of the auxiliary nozzles is sharpened; SoC
The top end is formed to be thinner than the thickness in the weft insertion direction of the single auxiliary board, and the auxiliary nozzle is arranged so that the top end is located within the thickness in the weft insertion direction of the single auxiliary board. An auxiliary fluid injection device in a jet loom, characterized in that: