KR900008679B1 - Weft Reservoir for Fluid Injection Looms - Google Patents

Abstract

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Description

Weft Reservoir for Fluid Injection Looms

1 is an example of the weft reservoir according to the present invention.

2 to 3 are examples of the operation of the weft reservoir according to the present invention.

The present invention relates to a weft reservoir for a fluid-jet loom, and in particular, a weft yarn is wound and stored by a rotary yarn guide operated simultaneously with the operation of the loom around a reservoir drum consisting of conical and cylindrical parts. The present invention relates to the construction and operation of a weft reservoir for fluid-jet looms that discharges the weft to insert the weft under pin control conditions.

Next, as described above, the device side adjacent to the weft supply source is referred to as the upward side, and the device side adjacent to the main injection nozzle is referred to as the downward side.

In general, the weft begins to insert at a time between crank angle of 90-100 ° and ends at a time between crank angle of 250-270 °.

First, the weft is released from the reservoir drum by free delivery and the so-called weft control delivery is started just before the end of weft insertion.

For simplicity, weft insertion should begin at a crank angle of about 90 ° and end at a crank angle of about 270 °.

When the control pin is located in the operating area, the control pin engages the weft on the reservoir drum so that the weft is not sent out of the reservoir drum.

Once the control pin is in the standby position, the control pin releases the weft on the reservoir drum, allowing the weft to exit the reservoir drum. In particular, the control pin first retracts from the most advanced position in the operating position, leaves the operating position, enters the standby position and reaches the most retracted position of the standby position.

In the return process, the control pin advances from the most retracted position in the standby position, leaves the standby position, enters into the operating position, and returns to the most advanced position in the operating position.

In the case of the weft reservoir in which the control pin is configured in the reservoir drum, the control pin disappears from the vicinity of the reservoir drum, and the control pin leaves the operating position and appears in the vicinity of the reservoir drum to move into the operation position.

Weft reservoirs for two pick alternate weaving with three control pins have already been proposed.

In short, in the conventional structure, the control pins from the first to the third order are formed in succession in the axial direction of the reservoir drum to drive each of them by a suitable cam drive, so as to have an arc shape in the axial direction of the reservoir drum. I was allowed to shuttle along the route

The weft enters by passing two control pins while moving along this arc-shaped path of movement.

In particular, the weft yarn held by the primary control pin is taken over by the tertiary control pin, and the weft degree held by the secondary control pin is taken over by the third control pin.

In this type of weft storage, the wefts stored in the storage drum move forward and move downward from the storage drum by moving forward.

This weft movement is done under pin control conditions, so the weft moves extremely smoothly over the reservoir drum without the risk of instantaneous damage.

However, in this conventional device, two types of weft rotation are inserted between pins.

That is, one is from the primary control pin to the third control pin, and the other is from the secondary control pin to the third control pin.

If the weft is inserted differently, the area of the weft changes and the moving distance is also different.

As a result, the state of the weft on the reservoir drum immediately before the weft is changed varies with each insertion, which is related to the inevitable change in weft movement during weft insertion.

Moreover, the cam drive modalities need to vary from one pin to another, requiring a highly complex device structure to control the cam drive of a generation of interactive control pins.

One object of the present invention is to produce an improved weft reservoir for a fluid-jet loom in which the weft yarn is moved stably and uniformly every time the weft is inserted. Another object of the present invention is to provide three control pins with only two control pins. The present invention provides an improved weft reservoir for a fluid-jet loom which functions almost the same as a conventional weft reservoir.

Yet another object of the present invention is to fabricate an improved weft reservoir for a fluid-jet loom which greatly reduces the number of weft movements during weft storage.

According to one feature of the invention, a pair of cam-driven control pins are arranged in succession in the axial direction of the reservoir drum at a constant time along the arc-shaped movement path in the axial direction of the reservoir drum between the standby position and the operating position. Move along.

The weft coil is always moved from the primary control pin to the secondary control pin when the control pins cross each other during the movement.

According to another feature of the present invention, when a pair of control pins are driven by a cam to move each along an arc-shaped movement path in the axial direction of the reservoir drum, the first weft insert is inserted when the control pins are excessively moved. Weft coil for the move from the primary control pin to the secondary control pin.

One example of the weft reservoir according to the present invention is shown in FIG. 1, which uses a stationary reservoir drum. Needless to say, the invention is also applicable to a weft reservoir with a rotary drum.

The weft reservoir can be used for weaving with a single weft, although the use of the weft reservoir is described in detail with respect to teaching two types of weft.

In the following weft reservoir structure, the upstream primary control pin first moves relative to the reservoir drum on the outside of the reservoir drum while the downstream secondary control pin is directed to the reservoir drum inside the reservoir drum. Move. However, this configuration is not limited to this embodiment.

The primary control pin can move inside the reservoir drum and the secondary control pin can also move outside the reservoir drum. All of these may be configured outside or inside the reservoir drum.

The reservoir drum 1 extends in the axial direction of the reservoir drum 1 in the upward conical portion 1a, the downwardly cylindrical portion 1b and the configured portion of the conical portion 1a and the cylindrical portion 1b. The hole 1c to be formed is comprised.

A magazine 41 is fixed to the outside of the reservoir drum 1 and a hole 41a is formed in the wall of the magazine 41 facing the reservoir drum 1 while extending in the axial direction of the reservoir drum 1. ) The primary control pin P1 is configured to face the reservoir drum 1 through the hole 41a, and the drive cam C1 is installed in the magazine 41.

The support shaft 43 is fixed in the magazine 41 so as to extend in a direction substantially perpendicular to the axial direction of the reservoir drum 1 and the branch lever 46 is moved from the center point onto the support shaft 43. Insert it.

The first branch 46a of the branch lever 46 extends into the hole 41a to securely hold the primary control pin P1 at the distal point, while the secondary branch 46a is cam follower. To 48 to allow rotation.

Tension coil spring between two spring seats 51 and 52 suitably configured in the magazine 41, with the spring seat 51 properly configured in the secondary branch 46b of the branch lever 46. Insert (54).

The cam shaft 56 is rotatably configured in the magazine 41 substantially parallel to the support shaft 43 of the branch lever 46, and the drive cam C1 of the primary control pin P1 is cam shaft 56. Fix it on).

In the drawings, only a partial cross section of the cam is illustrated for simplicity.

The camshaft 56 is connected in a known manner to a suitable external drive source, such as a drive shaft (not shown) for the rotary feeder 21 of the weft reservoir, to be rotated simultaneously with the loom operation.

Since the cam hole 48 is always in contact with the periphery of the drive cam C1 by the elastic pressure as the tension coil spring 54 operates, the cam C1 rotates in an arc shape around the support shaft 43 when the cam C1 rotates. The primary control pin P1 is moved.

The support shaft 4 is secured to the internal framework 3 of the reservoir drum 1 while extending substantially perpendicular to the axial direction of the reservoir drum 1 and the branch lever 7 at the intermediate point. Insert onto the support shaft (4).

The primary branch 7a of this branch lever 7 is used to securely hold the secondary control pin P2 facing the periphery of the reservoir drum 1 at the distal point, while the secondary branch 7b is cammed. The ball is pivotally connected to (8). The compression spring (between the spring sheet 9 and the other spring sheet (not shown in the drawing) and the spring sheet 9 suitably configured in the secondary branch 7b of the branch lever 7 and properly configured in the inner frame 3 11) Insert.

The cam shaft 19 is rotatably installed in the frame 3 so as to be substantially parallel to the support shaft 4 shown above, and the drive cam C2 of the secondary control pin P2 is connected to the cam shaft 19. Install firmly. For simplicity, only a part of the cam is illustrated in the figure.

By the operation of the compression spring 11, the cam hole 8 is always in contact with the drive cam C2 at an elastic pressure.

As the drive cam C2 rotates, the secondary control pin P2 moves around the support shaft 4.

The operation of the weft reservoir according to the present invention will be described in detail with respect to the 2x1 type of weaving in which two primary weft yarns and one secondary weft yarn are alternately inserted.

That is, when weft A and weft B are used, wefts are inserted in the order of A, A, B, A, A, B. A combination of two weft reservoirs is used for this purpose.

Each drive cam (C1 and C2) rotates once during a crank angle period of 0-1080 °, and weft discharge is performed during a crank angle period of 0-360 ° in the weft reservoir for the first weft insertion. Weft dispensing for insertion is done during a crank angle period of 360-720 °. During the crank angle period of 720-1080 °, other weft reservoirs perform one weft feed for insertion.

In the case of a 2 × 2 type teaching where two primary weft yarns and two secondary weft yarns are alternately inserted, each drive cam C1 and C2 has a 1 crank angle period of 0-1440 ° in one weft reservoir. Rotation is performed and weft feed for insertion is performed during the crank angle period of 0-720 °.

During the crank angle period of 720-1440 °, weft dispensing for insertion is done twice in different weft reservoirs.

The center angle of each drive cam, which corresponds to the 0-720 ° crank angle period, depends on the type of teaching by the two types of weft.

However, the high and low cost of the drive cam and the travel time from the high position to the low position of the drive cam are not affected by the teaching type at all.

An example of operation of the weft reservoir according to the present invention is shown in FIG. 2, where four weft yarns correspond to the weft length for one-time weft insertion.

Furthermore, the black circle in the figure is a weft coil for primary insertion of weft yarn and the white circle is a weft coil for secondary insertion of weft yarn.

The crank angle at time I illustrated in FIG. 2 is 0 degrees.

At this time, the primary control pin P1 remains at the most advanced position in the operating position, while the secondary control pin P2 begins to retract from the most advanced position in the operating position and the reservoir drum 1 It moves downward along the arc-shaped movement path in the axial direction of).

The weft storage for secondary insertion has already begun on the upper side of the primary control pin (P1), and the weft coil for primary insertion is at the portion between the primary control pin (P1) and the secondary control pin (P2). It is saved.

The crank angle at time II illustrated in FIG. 2 is 90 degrees.

The primary control pin P1 remains at the most advanced position in the operating position while the secondary control pin P2 is out of the operating position due to the continuous retreat.

In particular, the secondary control pin (P2) disappears around the reservoir drum (1). Weft dispensing for the primary insertion begins at this time.

Therefore, even if the storage of the weft is further continued on the upper side of the primary control pin (P1), the weft coil stored in the portion between the primary and secondary control pins (P1, P2) is the main injection that started the primary insertion of the weft yarn It is sent out by the pulling force by the nozzle.

The crank angle at time III illustrated in FIG. 2 is 180 degrees.

The primary control pin P1 remains in the most advanced position in the operating position while the secondary control pin P2 has already reached the most retracted position in the standby position.

The weft storage on the upstream side of the primary control pin P1 and the weft transmission on the downstream side continue at this moment.

The crank angle at time IV illustrated in FIG. 2 is 270 °.

At about this moment, the primary control pin P1 moves downward by starting to retract from the most advanced position in the operating position.

At the same time, the secondary control pin P2 moves upward in the axial direction of the reservoir drum 1 by starting forward from the most retracted position in the standby position. At this point, the first insertion of the weft ends.

The weft yarn is stored at the upper side of the primary control pin P1, and no weft coil is left at the downward side.

The crank angle at time V illustrated in FIG. 2 is 360 °.

The weft coil for the secondary insertion, which was stored slightly on the upper side of the primary control pin P1 and the primary control pin P1, which moved downward, slightly over this time, was excessively moved upward. Is moved to the secondary control pin P2 at the moment of being excessive.

In other words, the movement of the stored weft occurs between the primary control pin (P1) and the secondary control pin (P2).

When the two control pins P1 and P2 come closest to each other, the stored weft moves, so that the weft coil is in a state where there is little congestion when moving. In other words, the movement of the stored weft is quite stable.

At time V, the primary control pin P1 remains at the most retracted position in the standby position while the secondary control pin P2 remains at the most advanced position in the operating position.

In particular, the primary control pin (P1) is located radially outside the cylindrical portion (1b) of the reservoir drum (1) and the secondary control pin (P2) is the boundary between the cone portion (1a) and the cylindrical portion (1b) It will be located around the part.

In this case, the weft coil for the secondary insertion is stored on the upper side of the secondary control pin (P2).

The crank angle at time VI illustrated in FIG. 2 is 450 °.

A little earlier than this time, the primary control pin (P1) begins to move forward from the most retracted position in the standby position and moves musk, and the secondary control pin (P2) begins to retract from the most advanced position in the operating position. The weft coil is on the upside while moving downward. At this time (VI), the weft transmission for the second insertion is at the beginning stage.

That is, the primary control pin (P1) is to enter the operating position and the secondary control pin (P2) is in the stage of about to leave the operating position. The weft coil is held on the upper side of the secondary control pin (P2).

The crank angle at the time illustrated in FIG. 2 is 540 °.

The primary control pin P1 remains in the most advanced position in the operating position, while the secondary control pin P2 remains in the most retracted position in the standby position.

At this time, the positions of the two control pins P1 and P2 are the same as in (III). The weft storage for the first insertion of the next cycle has already begun on the upside, and the weft sending for the second insertion has already begun on the downside of the primary control pin P1.

The crank angle at the time illustrated in FIG. 2 is 630 °.

Both the primary control pin P1 and the secondary control pin P2 remain in position at time. The second insertion of the weft is already over at this point. The weft is stored on the upper side of the primary control pin (P1). This condition is maintained even at the time of FIG. 2 at which the crank angle is 720 °.

The change in the condition at this time is 810 ° crank angle at time illustrated in FIG. Corresponds to the change from time (IV) to time (VI).

At this time, the primary control pin starts to retreat from the most advanced position in the operating position and moves downward while the secondary control pin P2 begins to advance from the most retracted position in the standby position. Again, the weft is stored on the upper side of the primary control pin (P1).

The crank angle at time XI illustrated in FIG. 2 is 900 °. Slightly ahead of this time, the primary control pin P1, which moves downward, is overlying the secondary control pin P2 that is moving upward, and is held on the upstream side of the primary control pin P1, and the first cycle of the next cycle. The weft coil for insertion is moved to the secondary control pin P2 at the very moment of excess.

In other words, the stored weft is moved between the primary control pin (P1) and the secondary control pin (P2).

When the movement of the weft yarn stored before the time (V) occurs, the weft coil for the secondary insertion is moved from the secondary control pin to the secondary control pin.

On the other hand, if the movement of the weft stored before the time (XI) occurs, the weft coil for the first insertion of the next cycle is moved from the primary control pin to the secondary control pin. In either case, the stored weft coil always moves from the primary control pin to the secondary control pin in the same axial direction of the reservoir drum where the two control pins are excessive.

This similarity in the movement of stored weft is related to the similarity in the weft storage method for primary and secondary insertion. The similar weft storage method at different times is related to the similar behavior of wefts during weft dispensing at different times. The greatest advantage of the present invention is that the weft thread can be inserted evenly every weaving cycle.

Finally, the crank angle at time XII illustrated in FIG. 2 is 990 °. Slightly ahead of this time, the primary control pin P1 starts moving forward from the most retracted position in the standby position and moves upwards, and the secondary control pin P2 begins retracting from the most advanced position in the operating position. To move downward.

The upwardly moving primary control pin P1 and the downwardly moving secondary control pin P2 become excessive.

As a result, at the time XII, the primary control pin P1 has entered the operating position, the secondary control pin P2 is about to leave the operating position, and the weft coil has a secondary control pin (P). It is in the state maintained as it is from the up side.

Thus all of them return to the situation at time (I) illustrated in FIG. 2 to start the housekeeping next loom operating cycle.

In the weft reservoir for the operation illustrated in FIG. 2, the respective drive cams C1 and C2 for the primary control pin P1 and the secondary control pin P2 are designed to have mutual concurrency. The weft thread for the primary and secondary insertions is moved between two control pins P1 and P2 in the same axial direction of the reservoir drum.

Another example of the operation of the weft reservoir according to the present invention is illustrated in FIG. 3, where the four weft yarns are illustrated to correspond to the weft length for weft insertion as in the first example, and the black circle is for the first insertion of the weft yarns. Weft coil, and the white circle is weft coil for secondary insertion of weft yarn.

The crank angle at time I illustrated in FIG. 3 is 0 degrees.

The primary control pin (P1) is in the operating position, the secondary control pin (P2) is retracted from the most advanced position in the operating position and down along the arc-shaped movement path in the axial direction of the weft reservoir. If yes.

The weft storage for the secondary insertion has already begun on the upper side of the primary control pin P1, and the weft coil for the primary insertion is held in the part between the two control pins P1 and P2.

The crank angle at time II illustrated in FIG. 3 is 90 degrees.

The primary control pin P1 remains in the operating position, but the secondary control pin P2 has just left the operating position.

In particular, the secondary control pin P2 is in a state disappeared from the periphery of the reservoir drum 1. This starts the weft delivery for the first insertion. On the upper side of the primary control pin (P1), the weft thread is continuously stored and the weft coil held between the primary control pin (P1) and the secondary control pin is the first weft insertion of the weft to the traction force of the main injection nozzle. It continues to be sent.

The crank angle at time III illustrated in FIG. 3 is 180 degrees.

The primary control pin P1 remains in the operating position and the secondary control pin P2 remains in the standby position.

This condition is maintained at time (IV) in FIG. 3 with a crank angle of 270 ° and the weft yarn is further stored on the upper side of the primary control pin P1. By the time (IV), the first insertion of the weft ends.

The crank angle at time V illustrated in FIG. 3 is 360 °.

A little earlier than this time, the primary control pin P1 starts to retreat from the most advanced position and is downward along the arc-shaped movement path in the axial direction of the reservoir drum 1, and at time V You are about to leave the operating position. The secondary control pin P2 remains in the most retracted position of the standby position.

The weft coil is held on the upper side of the primary control pin P1 and used for the second insertion of the weft yarn.

The crank angle at time VI illustrated in FIG. 3 is 450 °.

The primary control pin P1 is in the state of reaching the most retracted position in the standby position, and the secondary control pin P2 remains at the most retreat position in the standby position.

At this point, the secondary insertion of the weft begins.

As a result, the weft coils held by the primary control pin P1 are continuously sent out by the pulling force of the main injection nozzle.

The process from time (IV) to time (VI) in this example should be compared with the process from time (IV) to start (VI) in the example illustrated in FIG.

In the example of FIG. 2, the weft coil for secondary insertion is first moved from the primary control pin P1 to the secondary control pin P2 and then sent out from the reservoir drum 1.

In the case illustrated in FIG. 3, the weft coils held by the primary control pins P1 are discharged to be directly discharged from the reservoir drum 1 without moving between the pins.

The crank angle at the time illustrated in FIG. 3 is 540 °.

The primary control pin P1 has already begun moving forward from the most retracted position in the standby position, and the secondary control pin P2 remains in the standby position.

The crank angle at the time illustrated in FIG. 3 is 630 °.

The primary control pin P1 is already in the most advanced position in the operating position, and the position of the secondary control pin P2 remains the same.

The secondary insertion of the weft ends about this time, and the weft storage for the first insertion of the next cycle is already started on the upper side of the primary control pin P1. This condition is maintained at time 3 in the crank angle of 720 ° and the weft storage shown above continues.

The crank angle at the time illustrated in FIG. 3 is 810 °.

The primary control pin P1 has begun to retract from the most advanced position in the operating position, and is in the stage of trying to leave the operating position at this time.

At the same time, the secondary control pin P2 has already begun to move forward from the most retracted position in the standby position and is in the stage of entering the operating position at this time. On the upper side of the primary control pin P1, the weft is continuously stored.

The crank angle at time XI illustrated in FIG. 3 is 900 °. Slightly ahead of this time, the primary control pin P1, which moves downward, has overlyed the secondary control pin P2, which has moved upward, and has been retained on the upper side of the primary control pin P1, and the primary insertion of the next cycle is performed. The weft coils for the second is moved toward the secondary control pin (P2) at the moment that is excessive. The movement of the stored weft occurs between the primary control pin (P1) and the secondary control pin (P2).

In this case, the primary control pin P1 stays at the most retracted position in the standby position while the secondary control pin P2 stays at the most advanced position in the operating position.

The crank angle at time XII illustrated in FIG. 3 is 990 °.

The primary control pin P1 starts forward from the most retracted position of the standby position and moves upward along the arc-shaped movement path in the axial direction of the reservoir drum.

At the same time, the secondary control pin P2 starts to retreat from the most advanced position in the operating position and moves downward, and the weft coil moves in accordance with the movement of the secondary control pin P2.

In this case, the weft coil for the first insertion of the next cycle is first moved from the primary control pin P1 to the secondary control pin P2 and then sent out from the reservoir drum 1.

However, as already explained from time (IV) to time (VI), the weft coil for secondary insertion is sent directly from the reservoir drum without preferential weft movement between the pins. By changing the axial position of the weft coil on the reservoir drum to reduce the number of movements of the weft that is unavoidable, the weft coil becomes almost no congestion as compared to the primary operation illustrated in FIG.

Claims (7)

A reservoir drum consisting of an upward conical section and a downward cylindrical section, a spinneret that rotates around a reservoir drum for supplying wefts taken from a given source, and stored in the reservoir drum continuously in the axial direction of the reservoir drum. Primary and secondary control pins directed towards the operating position around the boundary formed between the conical and cylindrical portions of the drum, and the reservoir drum along the arc-shaped movement path between the operating and standby positions. During the movement of the primary and secondary control pins in the axial direction of, let the primary and secondary control pins pass over each other so that at least once in one operation cycle of the weft reservoir, the secondary control pins Weft storage for fluid-jet looms for storing the weft under pin control conditions consisting of primary and secondary control pin drive means for moving the weft coil into Value. The primary control pin and the secondary control pin according to claim 1, wherein the primary control pin is released from the operating position and the secondary control pin enters the operating position immediately before the respective weft yarns are inserted. Weft storage device for fluid-jet looms that drives the primary and secondary control pins in such a way that the weft coils move whenever they pass. The weft coil according to claim 1, wherein the primary control pin is released from the operating position immediately before starting to insert the weft primary, and the secondary control pin enters the operating position at the same time as the weft coil for the primary insertion of the weft yarn. Weft storage device for a fluid-jet loom that allows the movement of the loom. The weft storage device for a fluid-jet loom according to claim 1, 2 or 3, comprising a cam driving mechanism in the drive means. The weft storage device for a fluid-jet loom according to claim 1, 2 or 3, wherein the standby position of the control pin is radially configured inside the reservoir drum. The weft storage device for a fluid-jet loom of claim 1, wherein the standby position of the control pin is radially formed outside the reservoir drum. Paragraph 4 of claim a. Primary and secondary frameworks fixed to the reservoir drum; (B) primary support shafts secured to primary frames; A primary lever pivotally mounted on the primary support shaft, primary lever with primary control pin and rotary secondary branch with primary cam ball; (D) primary cam shafts, rotatably mounted on the primary frame parallel to the primary support shaft and operatively connected to the main drive shaft for the feed hole; Primary cam, bar fixed to primary camshaft. (F) primary means for bringing the primary cam ball into contact with the primary cam by elastic pressure; Secondary support shaft fixed to secondary frame, h. Secondary lever pivotally fixed on secondary support shaft, with secondary branch with secondary control pin and secondary branch with secondary cam ball. Secondary cam shaft, car rotatably mounted on the secondary frame parallel to the secondary support shaft, operatively connected to the main drive shaft. Secondary cam, car fixed to the secondary camshaft. A weft storage device for a fluid-jet loom, comprising a secondary means for causing the secondary cam ball and the secondary cam to contact by elastic pressure in a cam drive mechanism.

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