KR840001521B1 - A weft savings apparatus of shuttleless looms - Google Patents

Abstract

Shuttleless loom of the altermate two-pick air jet type, has a continuously-rotated weft storage drum provided with a radially-movable weft control pin pref. located between different-dia, portions of the drum and in a groove with shallow side flanges. The pin is retracted at the start of a pick, but is projected towards the end of that pick to engage and control the weft, i.e. to prevent wastage by controlling the pick length to keep it constant. pref. the pin is projected and retracted by a rotatable ring on the drum with a shew groove engaging a stud on the pin.

Description

Weft Saving Device

1 is a perspective view of a weft saving drum used in the weft saving device of the first embodiment according to the present invention;

2 is a partial cross-sectional side view of the weft saving device including the weft saving drum shown in FIG.

3 is an explanatory diagram of the weft saving device shown in FIG.

4 is an operation diagram of the weft saving device shown in FIG.

5A to 5I are perspective views showing the operation of the weft saving device of the first embodiment.

Figure 6 is a graph showing a method for sending the weft in the weft saving device according to the present invention.

Figure 7 is a perspective view of the weft saving drum used in the weft saving device of the second embodiment according to the present invention.

8 is a partial cross-sectional side view of the weft saving device including the weft saving drum shown in FIG.

9 is an explanatory diagram of the weft saving apparatus shown in FIG.

FIG. 10 is an operation diagram of the weft saving apparatus shown in FIG.

11A to 11H are perspective views showing the operation of the weft saving device of the second embodiment.

12 is a perspective view of the weft saving drum used in the weft saving device of the third embodiment according to the present invention.

FIG. 13 is a partial cross-sectional side view of the weft saving device including the weft saving drum shown in FIG.

14 is a cross-sectional view of the diameter of the weft saving device shown in FIG.

FIG. 15 is a partial side cross-sectional view of a modification of the third embodiment shown in FIG.

FIG. 16 is a sectional view of the apparatus shown in FIG.

Figure 17 is a partial cross-sectional side view of the weft saving device of the fourth embodiment according to the present invention.

The present invention relates to a weft saving device of a two-peak replaceable fluid spray loom, more specifically, a weaving yarn continuously supplied from a source, such as an air-jet loom for performing a two-pick replaceable weft insertion in a four-crank cycle. The invention relates to a weft saving device which is temporarily stored in a rotating drum (s) that is continuously discharged to a spray nozzle on a peak replaceable fluid jet loom.

Two-peak replaceable weft saving devices are classified into two types, one using the weft saving tube (s) and the other using the weft saving drum (s). In terms of supplying the weft, the above two are also classified into two types, one for continuous weft supply and the other for intermittent weft supply. Some examples of intermittent weft-fed weft saving devices are described in Japanese Patent No. 10692/64 and Utility Model No. 8701/73.

In the case of the weft saving device of this type, weft slip occurs when the weft side length for the first weft insertion is started. Excessive tension may also occur in the weft at this moment. In addition, when the weft side preparation for the second weft insertion is completed, the supply of the weft can not be stopped quickly due to the inertia of the weft and related parts, it is difficult to accurately regulate the length of the measured weft.

In order to eliminate this problem, a continuous weft feeder can be used. A continuous weft feeding type weft saving device is described in Japanese Utility Model Publication No. 34306/73. In the case of the weft saving device of this type, the amount of weft for two peaks is stored in the weft saving pipe at once and is divided into two at the time of weft insertion. Therefore, the length of the weft saved in the tube before the first weft insertion is different from the length of the weft yarn before the second weft insertion, that is, after the first weft insertion.

This is caused by a large difference in resistance to weft delivery from the tube during the first and second weft insertion. This, of course, results in a difference in weft force, which adversely affects product quality on the weaving machine in which weft saving devices are used. While the weft is stored in the tube, the weft is piggybacked in U-magnetism. This tends to twist or entangle the weft yarn in a relatively free state during the saving, especially weaving conditions that adversely affect the product when the weft yarn is a high twist yarn. The use of strong airflow in the tube ensures that the wefts are not twisted or entangled during saving, but this causes other problems such as increased resistance to weft discharge, increased power consumption and fluff formation.

In order to avoid the above problems, it is advantageous to use a combination of saving the weft on the drum and continuous weft feed. Even when the continuous weft feeding method and the weft saving method on the drum are combined, it is also necessary to control and send the weft in order to prevent the fluctuation of the length of the weft inserted during the period in which the first and second weft inserting ends. In the case of the conventional weft saving drum, it is difficult to combine the weft saving drum method and the continuous weft feeding method in the conventional saving device. It was technically impossible.

The basic purpose of the present invention is to ideally combine the weft saving drum method and the continuous weft feeding method in the weft saving device for two-peak replaceable fluid-jet North Korean looms. Another object of the present invention is to perform a weft control delivery from a weft saving drum supplied with weft continuously during the first weft insertion end period in the two-peak replaceable fluid spray loomless machine.

According to the basic position of the present invention, the weft yarn is continuously fed to the continuously rotating weft saving drum assembly, and the weft control pin is temporarily matched to the operating position at a prescribed time so that the control pin contacts the weft thread released from the drum assembly. By arranging to face the drum assembly, controlled feeding of the weft occurs. In the following, the parts belonging to other embodiments are represented by the same member numbers and symbols with the same operation of the actual structure.

The present invention relates to a two-peak replaceable weft saving device in which the weft yarn is continuously supplied, and the saving device is essentially equipped with a pair of weft saving drums. However, these weft saving drums are very similar in structure and operation except for the prescribed operating time. Therefore, for convenience of description, only one of the pair of weft saving drums described below will be described.

One embodiment of the weft saving drum according to the present invention is shown in FIGS. 1 and 2, where the weft saving drum 10 is wound around a fixed cover C, a saving drum 10 described in detail later. The weft control pin Pa, which can operate on the weft yarn, and a device (not shown) for controlling the action of the weft control pin Pa are attached. An additional device that adjusts the circumferential angle position of the weft control pin (Pa) with respect to the weft saving drum (10) according to the change of the weft length inserted and changed according to the change of the weaving width is appropriately attached to the weft saving drum. .

The weft saving drum 10 is made up of several cylindrical and conical portions arranged axially. At the furthest position from the weft ejecting nozzle (not shown) of the loom, the cylindrical drive unit 12 is arranged around the main shaft 11 in a state in which the shaft roller and its circumference are pressed to rotate the weft bottom storage drum. The drive part 12 enters the conical weft guide part 13 hunting toward the nozzle side. The conical guide portion 13 then enters the cylindrical weft saving portion 14, the diameter of which is smaller than the diameter of the drive portion 12. This portion 14 is hereinafter referred to as " first weft saving portion. &Quot; The same weft saving part 17 is installed around the main shaft 11, the saving part and the diameter of which are actually equal to the diameter of the first weft saving part 14. This part 17 is hereinafter referred to as "second weft saving part". The cylindrical portion 16 is provided between the first and second weft saving portions 14 and 17 whose diameter is somewhat smaller than the diameter of the two portions 14 and 17. This part is hereinafter referred to as "annular groove".

The end portions of the first and second weft saving portions 14 and 17 coupled with the annular groove 16 are equipped with small flanges 14a and 17a for smooth transfer of the weft yarns to be described later. At the position closest to the nozzle, the cylindrical portion 18 is fixed to the main shaft 11 which is connected to a given drive source (not shown) at its boss (not shown), and the diameter of the cylindrical portion is 14. 17) smaller than the diameter. This part is hereinafter referred to as "holder".

The six parts 12-18 described above are integrally formed and rotatable as the main shaft 11 is driven to rotate. The cover C surrounds a portion of the second weft saving portion 17 and the holder portion 18 with a slight gap while making the annular air passage 19 around the holder portion 18. The air passage 19 communicates with the outside through the end opening of the cover C. As with the known drum type weft saving device, the air supplied by a given source (not shown) flows through the air passage in the same direction as the rotation direction of the weft saving drum 10.

The control pin Pa is installed at a position coinciding with the annular groove 16 of the weft saving drum 10, and is defined according to the operation of a control mechanism (not shown) including a cam and a link that operate simultaneously with the operation of the loom. At a given time, the retracting groove 16 moves forward. The continuous operation of the weft saving drum according to the present invention will now be described in detail with reference to FIGS. 4 and 5a to 5i. In this regard, the structure of the weft saving drum 10 will be described with reference to FIG. 3 and the above figure in order to easily understand the operation.

As shown in FIG. 4, one full-operation cycle of the weft saving device according to the invention spans the four crank cycles (I-IV) of the loom, ie 1,440 ° crank angle. For convenience of explanation, in the following, a specific time for weft insertion and control pin operation is set. However, the application of this particular time to the present invention may be adjusted as necessary. Assume that the weft saving drum 10 saves the weft length corresponding to 1/2 peak during one crank cycle of the loom.

FIG. 5A shows the state of the weft saving drum 10 at time A in FIG. 4, that is, when the insertion of the second weft yarn has just finished, that is, at a 610 ° crank angle. At this time A, the control pin Pa retracts from the annular groove 16 of the drum 10 to remain in the non-operational position, and the weft is not stored on the drum 10 yet. Since the weft yarn (W) is continuously supplied from the source (not shown) to the leaf stream, as the loom is clouded, the weft yarn (W) is applied to the first weft saving portion (14) of the drum (10) by 0.5 peak / 360 ° crank angle. Are saved at a rate. Since weft insertion does not occur in this period, the weft yarn is not sent out from the weft saving drum 10. Thus, the length of the wefts stored on the drum 10 gradually increases as shown in FIG.

FIG. 5B shows the state of the weft saving drum at time B in FIG. 4, ie at 970 ° crank angle. At this moment, the weft length corresponding to 1/2 peak is already wound around the first weft saving portion 14 of the drum 10 and is being saved. The weft delivery from the other weft saving drum, ie the first weft insert, starts at 830 ° crank angle and ends at time B, 970 ° crank angle.

The annulus of the drum 10 to ensure that the control pin Pa is brought into its operating position at a time B, i.e. after the 970 ° crank angle the next weft wound to the position of the control pin Pa. It is driven to advance to the groove 16. As the control pin (Pa) is present and the saving drum (10) is rotated, the weft yarn (W) is moved to the second weft saving portion (17) beyond the control pin (Pa) to the second weft saving portion (17) of the drum (10). ) It starts to wind around and is saved.

Each position of the control pin Pa with respect to the saving drum 10 is fixed so that each position corresponds to the peripheral position on the drum 10, and as shown in FIG. The film is saved on the first weft saving part 14. While the weft amount corresponding to 1 peak is changed according to the weaving width on the loom, the total peripheral length of the weft saving part is constant when the diameter of the drum 10 is fixed once.

In order to solve this problem, each position of the control pin (Pa) should be able to change properly along the periphery of the weft saving drum in order to freely adjust the angle of winding the weft (W) on the drum (10). 5C shows the state of the weft saving drum 10 at the moment immediately after the time C, that is, the weft yarn W, moves to the second saving portion 17 in FIG. Operation of the loom and weft saving on the drum continue further. At the time D in FIG. 4, the weft amount corresponding to the 1/2 peak is already wound on the second weft saving part 17 and stored. More precisely, the aforementioned length and part are still on the first weft saving portion 14.

가 제2위사 저축부(17)상에 감겨 저장된다. 결국, (1+α)피크에 해당하는 위사량이 시간(E)에서 드럼상에 저축되어 있게 된다. 즉, 제1저축부(14)는 1/2 피크에 해당하는 위사량을 보유하고 제2저축부(17)는 (0.5+α)피크에 해당하는 위사량을 보유한다. 시간(E)에서의 위사 저축드럼(10)의 위사상태를 제5e도에 나타낸다.This state is shown in FIG. 5d. On the other hand, weft sending for inserting the second weft on another weft saving drum is performed between 1,190 and 1,330 ° crank angles. Since weft insertion has not yet begun, the weft W is wound and stored up to time E in FIG. 4, i.e., 110 ° crank angle, continues on the second weft saving 17. That is, the remaining two peaks between time (D) and time (E)

Is wound on the second weft saving part 17 and stored. As a result, the weft amount corresponding to the (1 + α) peak is stored on the drum at time E. That is, the first saving portion 14 has a weft amount corresponding to 1/2 peak, and the second saving portion 17 has a weft amount corresponding to (0.5 + α) peak. The weft state of the weft saving drum 10 at time E is shown in FIG. 5E.

Insertion of the first weft starts at time E, and the weft amount corresponding to the (0.5 + α) peak in the second weft saving part 17 is sent out. Since there is no specific resistance to the weft (W) delivery, the free delivery shown in FIG. 6 is performed here. After the weft W on the second weft saving part 17 is completely discharged, the weft W is now controlled by the presence of the control pin Pa and the continuous rotation of the weft saving drum 10. Pa) Drive below. This state is shown in Fig. 5f.

Under these conditions, since the position of the control pin Pa is fixed, the amount of weft W stored in the first weft saving portion 14 is the weft feed length between the weft feed rate and the 250 ° crank angle at the time F. It is sent out from the saving part in the same state as the speed. During this period, the weft (W) feeding speed from the weft saving drum (10), that is, the first weft saving part (14) is slightly less than the speed at the time of free delivery.

Control transmission of the weft yarn shown in FIG. 6 is continued from time (F) to time (G). The time F is somewhat earlier than the time G at which the first weft insertion ends. At a time G, that is, a 250 ° crank angle, the weft amount corresponding to one peak has already been supplied from the drum 10. The weft yarn W taken from the supply source during the first weft insertion period P1 is continuously wound on the first weft saving portion 14 of the drum 10 and stored. If weft insertion is not performed, the imaginary increase in the amount of weft stored on the drum 10 is shown by the oblique line in FIG. In practice, however, weft insertion is carried out twice at the same time, respectively, sending out the weft amount corresponding to one peak, so that the weft amount stored in the drum 10 is varied as indicated by the solid line. 5G shows the state of the weft saving drum 10 at the end of the first weft insertion.

The feeding of the weft yarn W in the drum 10 ends at the time G, but the supply of the weft yarn W from the supply source is continued. Therefore, the weft yarn W is wound on the first weft saving unit 14 and is saved, and the amount of weft yarn W stored on the drum 10 starts to increase again.

To ensure that the control pin Pa returns to its non-operation position at a time G, i.e. at a suitable time after the 250 ° crank angle until the next weft winding of the control pin Pa, the control pin is It is driven to retreat from the annular groove 16. This state is shown in FIG. 5h.

The second weft insertion starts at a 470 ° crank angle and the weft yarn W is sent out again, so that the amount of weft yarn W stored in the drum 10 is reduced. This weft delivery is free delivery since the weft W is taken from the first weft saving unit 14. At a time I just before the end of the second weft insertion at the 610 ° crank angle, the weft W is transferred directly from the supply roller SR of the source to the ejection nozzle.

The control feed of the weft begins at this moment when there is an influence by the feed rate of the roller SR. The state of the weft saving drum 10 at time I is shown in FIG. 5i. This weft control transmission lasts until time A in FIG. At time A, i.e., the 610 ° crank angle, the second weft insertion is terminated and the drum 10 is placed under the state shown in Fig. 5a to continuously repeat the operation shown in Figs. 5i to 5i.

As is apparent from the foregoing, the combination of the control pin and the annular groove on the drum 10 according to the present invention reliably controls the weft of the weft even if the weft is on a saving drum type weft saving device which is continuously supplied from a source. As a result, we can guarantee the production of uniform textile products with reduced weft losses. In the case of the first embodiment of the present application, the weft saving drum 10 is provided with two weft saving portions. However, the present invention is not limited to this structure. In the modified second embodiment of the present invention, the weft saving drum has only one weft saving part.

Such a weft saving drum 20 is shown in FIGS. 7 and 8, where a drum 20 such as the drum 10 of the first embodiment has a cylindrical drive 12 fixed to the main shaft 11, It has a conical weft guide 13 and a cylindrical holder 18.

Moreover, the cylindrical part 24 is formed between the weft guide part and the holder parts 13 and 18. The diameter of this intermediate part 24 is slightly smaller than the diameter of the drive part 12. This cylindrical portion 24 is hereinafter referred to as "weft saving portion".

The control pin Pa is disposed outside the side cross section of the cover C by a shaft 25 fixed to the side cross section. Like the control pin Pa used in the first embodiment, this pin Pb is connected to a mechanism for controlling its operation to rotate on a vertical plane with respect to the axis of the drum 20.

The weaving saving device continuous operation of the second embodiment of the present invention will be described later with reference to FIGS. 11A to 11H. In this regard, the structure of the weft saving drum is described in the figure shown in FIG. 9 in order to easily understand the operation. FIG. 11A shows the state of the weft saving drum 20 at the end time A of the second weft insertion, that is, at a 610 ° crank angle. At this time A, the control pin Pb is placed in its non-operational position away from the weft yarn W and no weft yarn is stored on the drum 20. Since the weft yarns W are continuously supplied, as the loom is operated, the weft yarns W are wound and stored on the weft storage unit 24 at a ratio of 0.5 peak / 360 ° crank angle. No weft insertion occurs in this period, and therefore, the amount of weft W on the saving portion 24 of the drum 20 gradually increases.

The state of the drum 20 at time B, that is, the 970 ° crank angle, is shown in FIG. 11B. At this moment, no weft insertion has begun yet, and the weft amount corresponding to 1/2 peak is already stored in the saving portion 24 of the drum 20. The feeding of the weft yarn from the other weft saving drum, ie the first weft insertion, starts at 830 ° crank angle and ends at time B, 970 ° crank angle.

The drum 20 is placed under time C, i.e. in the state shown in FIG. 11C at 1330 ° crank angle. At this moment, no weft insertion has started yet, and the weft amount corresponding to one peak is stored on the saving portion 24 of the drum 20. Incidentally, the weft delivery, ie the second weft insertion, in another weft saving drum starts at 1190 ° crank angle and ends at time C, i.e. 1330 ° crank angle.

이 위사 저축드럼(20)상에 더 저축된다. 그래서 이 순간에는 이미(1+α) 피크에 해당하는 위사량이 드럼(20)상에 축적되어 있다. 이 상태는 제11d도에 나타낸다.Saving of the position on the drum 20 is further continued in the period from time C to time D, i.e., 110 ° crank angle. During this period, the amount of weft equivalent to α peak

The weft saving drum 20 is further saved. Therefore, at this moment, the weft amount corresponding to the (1 + α) peak has already accumulated on the drum 20. This state is shown in FIG. 11d.

Insertion of the first weft starts at time D and the saved weft is discharged from the drum 20 at the same time as the new weft taken from the source is wound on the drum 20 and saved. Since the weft amount corresponding to the (1 + α) peak is already stored on the drum 20, the weft yarn W follows the free delivery in FIG. At time E, the control pin Pb is driven to rotate around the axis 25 by the control mechanism described above to match its operating position. In this operating position, the point of the control pin (Pb) is disposed in front of the outer opening of the cover (C) to engage the weft yarn (W) released from the weft saving portion 24 of the drum.

Thus, the weft yarn W is sent out from the drum 20 while being engaged with the control pin Pb in the operating position. This feed rate is the same as the weft measurement rate. Weft (W) now follows the control transmission in FIG. The state of the weft saving drum 20 is shown in FIGS. 11E and 11F. This time E is somewhat earlier than the time F at which the first weft insertion ends. The weft amount corresponding to one peak until the end time (F) of the first weft insertion is sent out from the weft saving drum 20. The weft yarn W taken from the supply source during this weft insertion period P1 is wound on the weft saving portion 24 of the drum 20 and stored. The hypothetical increase in the amount of weft stored on the drum 20 in the case where it is assumed that weft insertion has not been performed is shown by the oblique line in FIG. In practice, however, the weft amount corresponding to one peak each occurs simultaneously, and the weft insertion is performed twice, and the weft amount stored on the drum 20 is moved as indicated by the solid line.

The weft delivery at the drum 20 ends at time F, and the weft supply at the source continues. Thus, the amount of weft stored on the drum 20 increases again. The control pin Pb is described in more detail at the appropriate time G, after completion of the first weft insertion, before the next winding of the weft comes to the position of the control pin Pb by the control mechanism described above. It is driven by rotating from the back to the non-operational position. In this non-operational position, the control pin Pb is separated from the weft thread W released from the weft saving drum 20. The amount of weft on the drum 20 is reduced by starting the second weft insertion at the 470 ° crank angle and sending out the weft W stored on the drum 20 again. At this time, the weft (W) is in accordance with the free delivery shown in FIG. At the time (H) just before the end of weft insertion at 610 ° crank angle, the weft yarn (W) is discharged directly from the supply roller (SR) of the source, and the time (A) is maintained continuously due to the influence of the weft feed rate. The control transmission shown in FIG. The state of the weft saving drum 20 at time H is shown in FIG.

The second weft insertion ends at time A and the weft saving drum 20 returns to the state shown in FIG. 11A to repeat the operation as shown in FIGS. 11A-11H. The control pin Pb may be arranged on a body other than the cover C, provided that the control pin Pb can engage the weft W in its operating position and can escape from such engagement in the non-operating position. In the present invention, the control pin (Pb) can also be used to be driven to engage the weft yarn (W) that is released from the weft saving drum in the second weft insertion period. Various modifications are possible in connection with the first embodiment of the present invention in which the drum has an axially arranged first and second cylindrical weft saving portion.

One of such modifications is shown in Figs. 12 and 13, where the annular projections form the boundary between the first and second weft saving portions instead of the annular grooves in the first embodiment. 12 and 13, the weft bottom storage drum 30 is a fixed cover (C ₁ , C ₂ ) coupled in the axial arrangement, the ring assembly 40, the cover is rotated coaxially with respect to the drum (30) The control pin Pc and the control mechanism (not shown) which are driven to rotate the ring assembly 40 are attached to (C ₂ ). The first cover C ₂ is mounted on a horizontal axis 11 fixed to a loom frame (not shown). In some cases, the cover C ₁ rotates about an axis 11 extending perpendicular to the axial direction of the weft saving drum 30. The second cover C ₂ rotates axially with respect to the first cover C ₁ to move the angular position of the control pin Pc along the periphery of the weft saving drum 30 as the fabric width changes. Material

The ring assembly 40 is also axially rotatable with the second cover C ₂ . For this purpose, the ring assembly 40 is attached with an operating rod 41 (see also FIG. 14) connected to a suitable drive source (not shown). The control pin Pc has a shaft 2 rotatable on an axis accommodated in a hole provided in the cross section of the second cover C ₂ . The control pin Pc is provided with the protrusion part 3 which is no load supported by the skew groove | channel 42 (Skew gsoove) provided in the cross section of the ring assembly 40. As shown in FIG.

As shown in FIG. 12, the weft saving drum 30 has a cylindrical drive part 12, a conical weft guide part 13, a cylindrical first weft saving part 14, a cylindrical second weft saving part 17, and a cylindrical shape. The annular projection part 31 which forms the boundary between the holder part 18, the main shaft 11, and the 1st, 2nd weft saving parts 14 and 17 is provided. The fixed cover C ₁ makes an air passage 19 around the holder portion 18 of the drum 30. The control pin Pc is arranged on the second cover C ₂ at a position coinciding with the position of the annular projection 31 on the drum 30. As the ring assembly 40 is driven to axially rotate according to the movement of the operating rod 41, the protrusion 3 is guided by the skew groove 42 provided in the ring assembly 40, and thus the second cover C _2. Pivot about the axis 2 held by

Therefore, since the projection part 3 is provided integrally with the control pin Pc, the control pin Pc pivots about the shaft 2. The movement of the control pin Pc is shown in FIG. In the position shown by the solid line in FIG. 14, the hooked point of the control pin Pc is located near the base of the annular projection 31 in the drum 30. On the other hand, in the position shown by the oblique line in FIG. 14, the hooked point of the control pin Pc is located at the tip of the annular projection 31. As shown in FIG. The control pin Pc is provided with a concave nose 4a and a hook 4b used to engage the weft at its hooked point. When the weft yarn W is manipulated to pass from the first weft saving portion to the second weft saving portion through the annular protrusion 31, the weft W is caught by the hook 4b of the control pin Pc. In this movement, since the crossing angle of the weft yarn W and the annular projection 31 is relatively small, the weft yarn W is likely to exit the hook 4b of the control pin Pc. In order to prevent such an accident, the hook 4b is made deep. The point of the hook 4b converges forward so that the weft thread W and the control pin Pc engage in the lower position (solid line), that is, the operating position.

While the control delivery shown in FIG. 6 takes place, the weft yarn W is engaged with the concave nose 4a of the control pin Pc. In this case, since the crossing angle between the weft yarn and the annular projection 31 of the drum 30 is small, the weft yarn W does not escape the nouse 4a even though the nose is dug relatively shallowly. The structure of this shallowly dug-out concave nose (4a) can facilitate the separation of the weft (W) and the control pin (Pc) by moving the control pin upwards.

In the above description, it is assumed that the weft saving drum 30 rotates in the direction indicated by the arrow in FIG. 14, that is, counterclockwise. In the case where the weft saving drum 30 rotates in the opposite direction, the concave nose 4a should have a deeper structure while the hook 4b should have a shallower structure. The continuous operation of the weft storage device in this embodiment is actually the same as the continuous operation of the first embodiment, and the time diagram of the first embodiment shown in FIG. 4 can be used in this embodiment. At time (H), control pin (Pc) rises to the inactive position and at the time immediately after time (B) to the operating position.

Another variant is shown in FIGS. 15 and 16, in which the weft saving drum 30 extends upwardly toward the nozzle and the control pin Pc, which extends slightly below the annular projection. Equipped with a hook-shaped point. The upwardly tilted structure of the annular protrusion 32 allows the weft yarn W and the control pin Pc to contact very well. As in the above-described embodiment, the control pin Pc is supported by the second cover C ₂ using the shaft 2, and the protrusion 3 receiving the skew groove 42 in the ring assembly 40 is provided. Equipped In the case of the above real examples having respective annular projections, a control pin Pc is disposed on the nozzle side of the annular projection.

However, the control pin may be arranged opposite the annular projection. In this case, the upward annular protrusion must be tilted above the hooked point of the control pin. In the above-described embodiments, in which the weft saving drum is equipped with a pair of weft saving portions in which the weft saving drum is axially arranged, the pair of weft saving portions are driven to rotate at the same rotational speed by the common spindle. In this regard, however, in another embodiment of the present invention, the pair of weft saving portions may be rotated at different rotational speeds.

According to the third embodiment of the present invention, the weft saving device has a pair of weft saving drums arranged axially. The pair of weft saving drums are driven to rotate at different rotational speeds. That is, the peripheral speed of the second weft saving drum near the nozzle is greater than or equal to the peripheral speed of the first weft saving drum near the weft supply. The control pins are arranged facing the boundary between the two weft saving drums. The first weft saving drum corresponds to the first weft saving part described above, while the second weft saving drum corresponds to the second weft saving part described above.

The specified movement of the control pins causes the weft to move from the first savings drum to the second savings drum, and the contact of the control pins and the wefts upon insertion of the wefts enables the controlled delivery of the wefts. The difference in peripheral speed between the two weft saving drums prevents the weft from sagging during the movement from the first drum to the second drum. The difference in diameter between the drums ensures that the control pin and the weft contact each other for proper movement and controlled delivery of the weft. Another such embodiment of the present invention is shown in FIG. 17, which is equipped with a pair of weft saving drums 50, 60 in which the weft saving device is arranged axially. The first weft saving drum 50 has a cylindrical drive part 52 arranged axially in contact with the supply roller SR, a conical weft guide part 53 and a cylindrical weft saving part 54 which are next to the drive part 52. Are integrally equipped with each other. The weft saving part 54 is smaller in diameter than the driving part 52.

The second weft saving shaft 60 is provided with a cylindrical weft saving shaft 67 and a cylindrical holder portion 68 arranged axially. The weft saving portion 54 of the first drum 50 has a larger diameter than the weft saving portion 67 of the second drum 60. The first drum 50 is fixed to the cylindrical shaft 102 while the second drum 60 is fixed to the auxiliary shaft 101 extending axially through the cylindrical shaft 102. The first and second covers cover the first and second weft saving drums 50 and 60 to form an air passage 19 around the holder portion 68 of the second drum 60. It is mounted to the frame 103 in an axial arrangement. The first cover C ₁ rotates axially with respect to the second cover C ₂ so that each position of the control pin Pd supported by the first cover is changed according to the change of the fabric width on the weaving machine. Move along the periphery of 60).

Control pin (Pd) is actually mounted while stretch perpendicular to the axial direction of the weft saving device turns the first cover (C ₁₎ a horizontal pivot pin 104, the first cover (C ₁₎ by fixing the material. The control pin Pd is driven to rotate by the rod 105 reciprocating on the axis at the prescribed time simultaneously with the loom operation. This control pin Pd is used to make temporary contact with the weft W taken from the source at a prescribed time to assist the weft movement from the first weft saving drum to the second weft saving drum.

The control pin Pd also causes control withdrawal in FIG. 6 to occur by temporary contact with the weft yarn W freely released from the second drum 60. If the rod 105 is assumed to be in the position indicated by the solid line in FIG. 17, the control pin Pd remains in contact with the weft yarn W. FIG. When the rod 105 moves in the direction indicated by the arrow A, it is assumed that the control pin Pd is in the position indicated by the oblique line and is separated from the weft yarn W. In the inoperative position the control pin Pd is almost completely in the first cover C ₂ .

The auxiliary shaft 101 is rotatably supported by the gear casing 103 and the cylindrical shaft 102 fixed to the frame 103 using the bearings 107, 108, 109, while the cylindrical shaft 102 is bearings 110, 111. It is supported by the frame 103 to rotate freely. The first weft saving drum 50 is fixed to the cylindrical shaft 102 by a mounted nut 112, while the second weft saving drum 60 is attached to the auxiliary shaft 101 by a mounted nut 113. It is fixed.

In the gear casing 106, the gears 114 are fixed to the secondary shaft 101 and the gears 115 are fixed to the cylindrical shaft 102. The gears 114 and 115 are spaced slightly from each other in the axial direction with the weft saving device. Leave. The gears 114 and 115 are in engagement contact with the gears 116 and 117 fixed to the main shaft 11, respectively. Accordingly, the rotation of the main shaft 11 is transmitted to the second weft saving dredger 60 on the one hand via the gears 116 and 114 and the shaft 101 and on the other hand via the gears 117 and 115 and the shaft 102. It is delivered to the first weft saving drum (50).

The gear ratio between the starvation 116 and the starvation 114 and between the starvation 117 and the starvation 115 is that the peripheral speed of the second drum 60 is greater than the peripheral speed of the first drum 50 in this embodiment. It is designed to be greater than or equal to. The bearings 118 and 119 are arranged such that the main shaft 11 and the guiding casing 106 and the frame 103 are rotatably coupled. The operation of this embodiment is the same as the operation of the first embodiment, and the operation diagram of this embodiment is the same as the operation diagram shown in FIG.

As long as the relationship is satisfactory in peripheral speed, the relationship in diameter between the two drums can be reversed.

Claims (1)

Weft saving drum assemblies 10, 20, 30, 50 and 60 arranged between the main injection nozzle and a given source of weft yarn W of the loom, and a driving mechanism for driving the weft saving drum assembly for continuous axial rotation. 11,101,102, a supply mechanism (SR) for continuously feeding the weft yarn from the source to the weft saving drum assemblies (10,20,30,50,60) and weft control pins (Pa, Pb, Pc) arranged close to the weft saving drum assembly. In a weft saving device for a two-peak replaceable fluid weaving loom consisting of, Pd), the weft control pins (Pa, Pb, Pc, Pd) are the first weft thread after the completion of the second weft insertion in the current operation cycle. Match the weft at the appropriate operating position for a temporary engagement with the weft at the appropriate time before insertion is complete, and after the weft control pin has been inserted in the first weft, but the next winding of the weft is in the position of both control pins in the current operating cycle Two-peak replaceable fluid spray, characterized in that the weft is in a non-operating position suitable for being dismissed from the weft at a suitable time prior to its release, where the weft receives controlled discharge followed by free discharge from the weft saving drum assembly for flexible two-peak replacement. North drum loom and weft saving.

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