KR840001011B1 - Weft keeping apparatus for shuttle less loom - Google Patents

Abstract

A weft storage drum (20) for a shuttleless loom has a straight section (20d) adjacent to a weft inserter(2), which is preceded by a section (20C) inclined down towards the weft inserter. Two catchers(41,42) resp. cooperate with the inclined section and the straight section for the drum to receive and release wound-on pick lengths of weft. Specifically the inserter is a jet nozzle(2) and the catchers are hooks (41a,42a) projected and retracted by cams within the drum as it rotates synchronously with the loom cycle. The cams are actuated by gears or hooks which are projected and retracted by electromagnets energized via slip rings and brushes.

Description

Weft storage of loom without drum

1 to 9 show a first embodiment of the present invention.

1 is a front view.

2 is a front view with the drum removed.

3 is a front longitudinal cross-sectional view.

4 is a right side view.

5 (a) to 9 (a) is a right side view according to the operating state.

5 (b) to 9 (b) are views seen from the arrow A in Figs. 5 (a) to 9 (a).

10 to 16 show a second embodiment of the present invention.

10 to 16 show a second embodiment of the present invention.

10 is a front partial cross-sectional view.

11 is a right side view.

12 (a) to 16 (a) are right side views of the operating states.

FIG. 12 (b)-FIG. 16 (b) are the figures seen from the arrow a direction of FIGS. 12 (a)-16 (a).

17 to 25 show a third embodiment of the present invention.

17 is a front view.

18 is a front longitudinal cross-sectional view.

19 is a right side view.

20 is a circuit diagram.

21 (a), (b) and (c) 25 (a), (b) and (c) are diagrams showing drums and working pieces for each operating state.

26 is a front longitudinal cross-sectional view.

27 is a front longitudinal cross-sectional view.

28 and 29 show a fifth embodiment of the present invention.

28 is a side view.

Fig. 29 (a) is a side view in a certain operating state.

FIG. 29 (b) is the figure seen from the a direction of FIG. 29 (a).

)수단과 위사넣기 수단과의 사이에서 위사를 회전드럼에 감아서 소정의 길이를 저류하도록 한 위사 저류장치에 관한 것이다.The present invention is directed to sudden death in looms without drums (

The present invention relates to a weft storage device in which a weft yarn is wound around a rotating drum to store a predetermined length between the means and the weft inserting means.

Weaving looms, especially pneumatic looms, have been used as weft yarns such as span yarns. To this end, weft forces change rapidly while wefts are in place, and in particular, an increase in the state of the weft may occur. Not good to have. Considering the weft storage device, in the case of weft weaving, almost all of the length of one weft weaving weft length, for example, only 2/3 of the weft storage, is stored as weft weft. After the amount of free flow at zero loading, the length is measured and the length of the stomach is stored as long as the length of weaving until the weft loading period. Don't let it break. Such a device is known from Japanese Patent Application Publication No. 51-34499. That is, at the weft side side end of the straight portion of the drum which forms the taper portion which gradually decreases in diameter toward the weft inlet side, and the straight portion following it, the capturing ring which has a brush at the inner peripheral edge is subtracted, and this drum It is a device for storing the weft yarn length in the drum a plurality of times by rotating in the drum. Then, the storage of the weft of the wound is to maintain a certain range. In this apparatus, the sole is a weight on the side of the weft inserting means of the weft yarn wound around the drum, and the weft trapped in the drum is prevented from detaching from the drum.

In the weft storage device, as the weft is stored for one or more times of weft insertion as described above, the weft yarn that is completely stored during the weft insertion is pulled out, so that there is no sudden change in tension in the weft yarn. However, the weft thread is pulled out in contact with the above-mentioned sole, so that the wefting is required to increase the consumption of pressure air in order to cause short pick or increase the towing force in the loom where the weft is performed with weak traction. There was.

In addition, since the storage device does not have a function of distinguishing only one weft length, there is an inconvenience in that a device for restricting the weft length must be provided separately.

The present invention has been made in view of such a situation, and by using two devices for connecting the weft yarn on the drum with respect to the weaving machine in a drum having a taper portion of which diameter decreases toward the wefting axis and a straight line portion subsequent thereto, It is to provide a weft storage device that distinguishes and stores the wefts for the length of the wefts required for it until weft insertion, and solves the aforementioned inconvenience.

Hereinafter, the present invention will be described according to the embodiment shown.

1 to 4 (and 5 to 9) show a first embodiment of the present invention. In the figure (1) is the frame of the loom, (2) the air spray nozzle supported by the nozzle holder (3) installed in the frame (1), (4) the stay (5) fixed to the row file holder (3) Is attached to the rear of the axis (left in the drawing) of the nozzle (2), and the weft yarn (6) guided from the weft reservoir (described later) is guided to the guide (4) to the air jet nozzle (2). It is drawn in and wefted in the opening of the inclination 7 by the air injected from this nozzle 2 at the time of wefting.

Referring to the weft storage device according to the present invention, as shown in FIG. 1, the upper end portion of the bracket 9, which is horizontally disposed with the bolt 8 on the outer surface of the frame 1, is disposed horizontally. The lower end of the bracket 10 formed as 10a is fixed with the bolt 11 and the nut 12 so that the axis line of the bearing part 10a coincides with the axis line of the said guide 4.

As shown in FIG. 3, the intermediate part of the hollow shaft 14 is rotatably supported in the bearing part 10a via the bowl bearing 13, and the rear end of this hollow shaft 14 has a key ( According to 15, the belt 17 with a projection is wound up and it hangs, and the hollow shaft 14 is made to rotate with respect to a loom. Hereinafter, the transfer ratio is 3: 1, and the case where the hollow shaft 14 is made to rotate 3 with respect to 1 rotation of looms is demonstrated.

The front end of the hollow shaft 14 is fitted with a support ring 18 having a groove 18a (FIG. 1), and is fixed and crimped by a crimping hole 19. The flange 18b of the support ring 18 is fitted. The length measuring storage drum 20 is fixed. That is, the flange 21 of the drum 20 is inserted into the substrate 22 on the front side of the flange 18b, and these are inserted into the bolt 23. It is fixed to be united by.

The peripheral surface of the drum 20 has a diameter smaller than that of the first tapered data portion 20a whose outer diameter gradually decreases from the rear end shaft toward the front end shaft, and its minimum diameter portion (20d described later). A tapered taper portion 20b having a larger diameter and gradually increasing its outer diameter, and a second tapered taper portion 20c having a smaller outer diameter after successively decreasing its outer diameter in its maximum diameter portion; The liver is formed with a straight line portion 20d having a relatively large pole opened in diameter. The straight portion 20d has a diameter so that the length of the weft yarn 6 wound thereon is three times the length of the weft thread per stroke. It is set.

On the other hand, in the hollow shaft 14, this and the relative rotational material fixed shaft 24 penetrates, and the leading part of the lever 26 fixed by pressing the boss portion 26a with the vis 25 at the rear end thereof, The bracket 10 and the stud 27 (FIG. 1) are connected and fixed, and this shaft 24 is being fixed so that it may not rotate. The front end of the fixed shaft 24 penetrates the center portion of the substrate 22, and the gear 29 is fixed to the penetrating portion by the key 28. 30 is a spacer.

The gear 29 engages with the gear 33 rotatably mounted on the shaft 32 protruding from the substrate 22, and the gear 33 rotates on the shaft 34 protruding from the substrate 22. It is engaged with the gear 35 attached to the cage. Here, the reduction ratio of the gear 29 and the gear 35 is 1: 3, and as the drum 20 rotates once, the gear 35 revolves one third of the revolution, and thus, one revolution of the loom. The gear 35 is made to rotate once.

4, the cam 36 is fixed to the side surface of the gear 35 by the stud 37, and the cam which consists of two cam plates 38a and 38b superimposed on this stud 37 is comprised. In 38, the high part 38A and the low part 38B are formed by adjusting a phase according to the overlapping position of the two cam plates 38a and 38b.

On the other hand, the fixed shaft 40 protrudes from the substrate 32, and the proximal ends of the first and second hook levers 41 and 42 (FIG. 2) having the same shape are fixed to the fixed side 40. FIG. There is a meeting place. Cams 45 and 46 are attached to the intermediate portions of the first and second hook levers 41 and 42 by pins 43 and 44. The first and second hook levers 41 and 42 are attached. Springs 49 and 50 are installed on the four sides of the bolts 47 and 48 fixed to the hook levers 41 and 42 and the bolts 53 fixed to the substrate 22, respectively. The hook levers 41 and 42 of 2 are attached to each other, and their cam rollers 45 and 46 are brought into contact with the cams 36 and 38, respectively.

Connection portions 41a and 42a are formed at the front end portions of the first and second hook levers 41 and 42, respectively, and the connection portions 41a and 42a are respectively connected to the second end of the drum 20. The tapered taper 20c and the straight line 20d are arranged near the boundary of the taper 20d and the projections 51 and 52 arranged in the straight line 20d. And connecting portions of the first and second hook levers 41 and 42 when the upper portions 36A, 36B of the cams 36 and 38 and the cam rollers 45 and 46 abut, respectively. 41a, 42a protrude from the javelin 51, 52 onto the drum 20, the lower portions 36B, 38B of the cams 36, 38 and the cam rollers 45, When (46) abuts, the connecting portions (41a) and (42a) enter the drum (20).

54 is a rod-shaped guide formed with at least two grooves 54a and 54b, and is fixed to the tip of the stay 55 fixed to the bracket 10, the axis of which is the axis of the drum 20. Exposed parallel to

體 : 예를들면 코움)로 부터 끌어내서 텐서를 통과시킨 후,가이드(54)의 홈(54a)에 연결시켜서 드럼(20)의 제1점감테이퍼부(20a)와 전증테이퍼부(20b) 사이에 형성되는 홈(20e)에 연해서 길어감고,이어서 가이드(54)의 홈(54b)에 연결시켜서 드럼(20)의 제2점감테이퍼부(20c) 및 진선부(20d)에 간아서, 제1 및 제2의 후크레버(41),(42)의 연결부(41a),(42a)의 적어도 한쪽에 연결해서,상기 가이드(4)에 꿰여있다.Here, the weft yarn 6 is a yarn (not shown) (

體: For example, after passing from the comb) and passing through the tensor, it is connected to the groove 54a of the guide 54 and is connected between the first tapered tape portion 20a and the full tapered portion 20b of the drum 20. It extends along the groove 20e formed in the groove, is connected to the groove 54b of the guide 54, and is connected to the second tapered portion 20c and the straight line portion 20d of the drum 20, so that the first And at least one of the connecting portions 41a and 42a of the second hook levers 41 and 42, and are sewn onto the guide 4.

Next, the operation will be described with reference to FIGS. 5 to 9.

The hollow shaft 14 is connected to the pulley 16 by the power from the belt 17 and causes the drum 20 to rotate three times for one rotation of the loom in the direction of the arrow D. Due to this, the weft yarn 6 is wound around the groove 20e in the first tapered taper portion 20a of the drum 20 via the groove 54a of the guide 54, and then again the groove (of the guide 54). When combined with the second tapered taper portion 20c of the drum 20 via 54b), the taper 20c slides down from the taper portion 20c by its own tension and moves to the straight portion 20d while pushing the front one.

When the state immediately before wefting is explained, the upper portions 36A, 36B, cam rollers 45, 46 of the cams 36, 38 are shown in FIG. ), The connecting portions 41a, 42a of the first and second hook levers 41, 42 protrude from the javelin 51, 52 of the drum 20, It is only slightly wound around the second tapered taper portion 20c shaft from the groove 54a of the 54 to the connecting portion 41a, and the straight portion 20d is placed between the connecting portion 41a and the connecting portion 42a. The wheel-wound weft 6 is a weft yarn whose length is measured and stored as a length of weft weaving.

In this state, when the drum 20 rotates in the direction of arrow D, the cams 36 and 38 rotate in the same direction and rotate one revolution per one loom in the direction of arrow C, so that the first hook lever 41 The cam roller 45 continues to abut on the high portion 36A of the cam 36, while the cam roller 46 of the second hook lever 42 abuts on the lower portion 38B of the cam 38. The connecting portion 42a enters the drum 20. (FIG. 6)

In this case, the air injection of the nozzle 2 is started just before this, and the connection part 42a of the 2nd hook lever 42 enters into the drum 20, and is made into the straight part 20d of the drum 20. FIG. Since the weft yarn 6 wound up is released, the weft yarn 6 is drawn out while being pulled by the blowing air flow by the nozzle 2 and wefted into the opening of the warp yarn 7.

Then, even after the air spraying of the nozzle 2 is stopped, the weft yarn 6 is wefted by inertia, and when the amount of the weft yarn 6 wound at the straight portion 20d becomes zero, the first hook lever ( The weft thread 6 is caught by the connection part 41a of 41, and weft insertion is complete | finished (FIG. 7).

During the wefting, the drum 20 rotates approximately one turn in the direction of the arrow D, so that the weft yarn 6 is wound one or more times on the drum 20 between the grooves 54b of the guide 54 and the connection portion 41a. Lose.

Immediately after this, the cam roller 46 of the second hook lever 42 abuts against the high portion 38A of the cam 38 so that the connecting portion 42a protrudes from the javelin 52 of the drum 20. At the same time, slightly later than this, the cam roller 45 of the first hook lever 41 abuts against the lower portion 36B of the cam 36 so that the connecting portion 41a is drawn in the javelin 51 of the drum 20. . As a result, the weft yarn 6 which has hit the connecting portion 41a so far slides down from the second tapered tape 20c and is moved to the straight portion 20d, so that the connecting portion 41a does not engage with the weft thread 6. Without protruding (Fig. 9).

Immediately after this, through the state of FIG. 5, the state of FIG. 6 is reached, that is, the second hook lever 42 contacts the lower roller 38B of the cam 38 so that the connecting portion 42a It pulls in and wefts again.

10 and 11 (and 12 to 16) show a second embodiment of the present invention. The embodiment constitutes a second connecting device by another means. The same code | symbol as the Example is attached | subjected and a different part is demonstrated.

The linear portion 20f having a smaller diameter is formed on the front end side of the drum 20 straight line portion 20d, and has a plurality of connecting surfaces 60a that are perpendicular to the rotational direction over the entire circumference at the leading edge thereof. A toothed portion 60 is formed.

It is attached to the upper end of the swinging lever 62 which is pivotally fixed to the shaft 61 protruding from the guide 4 and the bracket 9, and moves around in the front and rear direction. The swing lever 62 is urged clockwise in FIG. 10 by a spring 65 mounted between the pin 63 protruding from the pin 63 and the pin 64 protruding from the bracket 9, and the lower end thereof. The cam roller 67 attached to the pin 66 is in contact with the cam 38 '. The cam 38 'is supported by the bracket 9 and fixed to a rotating shaft 68 that rotates one rotation for one loom. The cam roller 67 of the swing lever 62 has a high height of the cam 38'. The guide 4, which is in contact with the portion 38'A, moves to the rear side (the drum 20 side) so that the weft thread 6 is caught by the toothed portion 60, and the cam roller 67 is the cam ( When abutting the lower portion 38'B of 38 '), the guide 4 moves forward, and the weft yarn 6 is peeled off from the toothed portion 60.

Next, the operation will be described with reference to FIGS. 12 to 16.

Immediately before weft weaving, the cam roller 45 of the hook lever 41 abuts on the high portion 36A of the cam 36, and the connecting portion 41a protrudes from the javelin 51 of the drum 20 to weft. At the same time, the cam roller 67 of the swing lever 62 is abutted on the high portion 38'A of the cam 38 ', so that the guide 4 is rearward, that is, the drum 20 ) And the weft yarn 6 is caught by the toothed portion 60, and the weft yarn 6 is connected to the straight portion 20d of the drum 20 between the connection portion 41a and the toothed portion 60. It is wound about three turns (Figure 12).

When it is time to weft, the cam roller 67 of the swing lever 62 abuts the lower portion 38'B of the cam 38 ', so that the guide 4 moves forward, and the weft 6 is The toothed portion 60 is not caught (Fig. 13).

For this reason, the weft thread 6 is wefted by the injection airflow by the nozzle 2 as mentioned above, and there is no weft thread 6 wound around the red line 20d of the drum 20, and thus the connection part 41a At the time of hanging), weft closing is finished, and at this time, the weft yarn 6 for about one lap is hung on the connecting portion 41a (FIG. 14).

Immediately after this, the cam roller 67 of the swing lever 62 abuts on the high portion 38'A of the cam 38 'so that the guide 4 moves to the rear, that is, the drum 20 side, and the weft thread 6 ) And the cam roller 45 of the rear hook lever 41 abut the lower portion 36A of the cam 36 so that the connecting portion 41a of the drum 20 It protrudes from the javelin 51 and is located between the weft part which contacts the taper part 20c, and the weft part which is twisted by the straight part 20d (FIG. 16). Then, the state of FIG. 13 is reached, and wefting is performed as described above.

17 to 20 (and 21 to 25) show a third embodiment of the present invention. In the present embodiment, the first and second connecting devices are operated by electrical means. The same parts as those in the first embodiment described above are denoted by the same reference numerals, and the different parts will be described.

The rotary exit 70, which is supported via the bearing ball 13 in the bearing 10a of the bracket 10, is rotated by the power of the pulley 16 fixed to the rear end, and the flange 71 of the front end thereof. The tip of the bolt 23, which has penetrated), is screwed into a disc-shaped coil support 72 made of a nonmagnetic material (for example, aluminum) disposed on the rear side of the flange 71 so that they are integrated. Are combined.

A pedestal 73 is protruded from the substrate 22, and two electro-actuators 75 and 76 are attached to the pedestal 73 with their axes attached to the radial direction of the drum 20, The connecting portions 77a and 78a formed at the distal ends of the 77 and 78 are attached in the radial direction of the drum 20, and the connecting portions 77a formed at the distal ends of the working cores 77 and 78 thereof. , 78a is to face the javelin 51, 52 of the drum 20. The electromagnetic actuators 75 and 76 are provided with the operating cores 77 and 78 by their built-in springs (not shown) when their electromagnetic coils (not shown) are in the element state, thereby connecting the connecting portions 77a, The 78a does not protrude from the javelin 51, 52, and when the electromagnetic coil is excited, the connecting portions 77a, 78a are thrown through the actuating cores 77, 78. When the electromagnetic coil is excited, the connecting portions 77a and 78a protrude from the javelin 51 and 52 when the electromagnetic coil is excited. .

On the other hand, the support body (72) is formed with support rings (79) and (80) protruding on the bearing portion (10a) side concentrically with the shaft center thereof, and the support rings (79) and (80) have a cross-section c-shaped and annular. Iron core rings 81 and 82 made of a magnetic material (for example, a feride) are fixed by adhesion or the like. Coils 83 and 84 are wound around these iron core rings 81 and 82, and these coils 83 and 84 are connected to the electromagnetic coils of the electromagnetic actuators 75 and 76, respectively. have.

On the other hand, similarly to the support body 72 mentioned above, the coil support body 86 which has two support rings 87 and 88 is fixed to the drum 20 side end surface of the bearing part 10a with the bis 85. The coils 91 and 92 are wound around the iron core rings 89 and 90 fixed to the support rings 87 and 88, respectively, to correspond to the coils 83 and 84, respectively. To form a so-called rotation transformer.

The power feeding circuit to the coils 91 and 92 will be described with reference to FIG. 20, where 74 is a rotating shaft which rotates once per one rotation of the loom, and the working pieces 93 and 94 are fixed thereto. Proximity switches 95 and 96 are attached to the working pieces 93 and 94, respectively. Reference numeral 101 denotes a direct current power source, which is a driving power source for the proximity switches 95 and 96 and the amplifiers 97 and 98 via buses 102a and 102b. The light emitting diodes 99 and 100 form the port caphraic triacs 105 and 106 by the port triacs 103 and 104. The port triacs 103 and 104 are inserted in series between the coils 91 and 92 and the AC power supplies 107 and 108, respectively.

The operation is explained next.

During the operation of the loom, the rotating shaft 70 is rotated for one rotation of the loom, and the drum 20 and the coil support 72 are similarly rotated through the flange 21, whereby the coils 83, 84 and , Coils 91 and 92 are rotated relatively.

In addition, the rotating shaft 74, that is, the working pieces 93 and 94 are rotated once per one rotation of the loom, and the high portions 93A and 94A and the proximity switches 95 and 96 are opposed to each other. Then, output signals are emitted from the proximity switches 95 and 96. For example, when the high portion 93A of the working piece 93 is opposed to the proximity switch 95, the output signal is emitted from the proximity switch 95, which is amplified by the amplifier 97, so that the light emitting diode 99 is provided. In contrast, the output signal is emitted from the proximity switch 95, which is amplified by the amplifier 97, and current flows through the light emitting diode 99, so that the light emitting diode 99 emits light. In this case, the triac 103 is turned on when the light is received, and current flows in the coil 91 so that mutual induction occurs, and current flows in the coil 83 to form an electromagnetic actuator (75). Become a woman. As a result, the working iron core 77 is attracted and the connecting portion 77a of the tip portion protrudes from the javelin 51 of the drum 20. On the contrary, when the lower portion 93B of the acting piece 93 is opposed to the proximity switch 95, the above-described signal is not output from the proximity switch 95, so the triac 103 becomes non-conductive. The actuator 75 is demagnetized, and the connecting portion 77a is drawn into the drum 20 by returning by a spring in which the actuating core 77 is incorporated. Referring to Figs. 21 to 25 as the loom rotates, immediately before wefting, since the high portion 93A of the acting piece 93 faces the proximity switch 95, the former An actuating iron core 77, that is, a connecting portion 77a of the actuator 75, is formed from the javelin 51 of the drum 20, and the upper portion 94A of the actuation piece 94 is disposed relative to the proximity switch 96. Likewise, the operating core 78 of the electromagnetic actuator 76, that is, the connecting portion 78a, also protrudes. In this state, the weft yarn 6 is wound on the connecting portion 77a, wound three times on the straight portion 20d of the drum 20, and then connected to the connecting portion 78a (Fig. 21).

When the loom rotates in this state, the proximity switch 95 continues to face the high portion 93A of the acting piece 93, but the proximity switch 96 is connected to the lower portion 94B of the acting piece 94. Since the connection part 78a is drawn in the drum 20, the weft yarn 6 is connected by the air injection of the nozzle 2 which started just before this, and the weft filling is complete | finished, and this drum wetting by this weft filling When the amount of winding of the straight portion 20d of 20 is 0, the weft yarn 6 is connected to the connecting pin 77a, so that the weft yarn is finished, and the drum 20 rotates about one turn during this weft yarn. The weft yarn 6 is wound about one turn by the connecting portion 77a (FIG. 23)

Immediately after this, first, the high portion 94A of the acting piece 94 is opposed to the proximity switch 96, so that the connecting portion 78a protrudes again, followed by the lower portion of the acting piece 94 to the proximity switch 95. Since the 94B is opposed, the connecting portion 77a is drawn in, and the weft yarn wound around the tapered portion 20c slips down to move to the straight portion 20d, and is formed by the connecting portion 78a. Figure 24)

Then, when the weft yarn 6 is wound three times on the straight portion 20d of the drum 20, the upper portion 93A of the working piece 93 is opposed to the proximity switch 95, so that the connecting portion 77a It protrudes between the weft part wound on the taper part 20c and the weft part wound on the straight part 20d, and separates them (FIG. 25). Is done. In this embodiment, even when changing the length of the weft in one time from three times to four times of the drum or the like, there is an advantage in that the conversion operation becomes easy because only the working piece is changed without changing gears.

26 and 27 show a fourth embodiment of the present invention. This embodiment is a modification of the above-described third embodiment, and the same parts are denoted by the same reference numerals, and different parts will be described.

The flange 21 of the drum 20 is inserted into the substrate 22 on the front surface side of the flange 71 formed at the front end of the rotating shaft 70 and fixed to the bolt 23. The pedestal is supported by the bolt 23. The connection parts 77a and 78a formed on the operation cores 77 and 78 of the electro-actuators 75 and 76 attached to the pedestal 23 by fixing the 73 together, the drum 20 Is opposed to the javelin 51 and 52 of 109. 109 is a counterweight.

Meanwhile, an annular support plate 110 made of an insulating material is fixed to the rear surface side of the flange 71 of the rotary shaft 70, and two slip rings 111 and 112 are fixed to the support plate 110 in a concentric manner. It is. These slip rings 111 and 112 are connected to the electromagnetic actuators 75 and 76 by the lead wires 113 and 114, respectively. 115 is the lead wires 113 and 114, respectively. It is a pressing part of the dragon.

Meanwhile, an annular support plate 110 made of an insulating material is fixed to the rear surface side of the flange 71 of the rotary shaft 70, and two slip rings 111 and 112 are fixed to the support plate 110 in a concentric manner. It is. These slip rings 111 and 112 are connected to the lead wires 113 and 114 to the electromagnetic actuators 75 and 76, respectively. Reference numeral 115 denotes a pressing part for the lead wires 113 and 114.

On the other hand, the arc-shaped support plate 116 is fixed to the drum 20 side end surface of the bearing portion 10a of the bracket 10 by the bolt 117, and the brush supporter 119 is attached to the support plate 16. , (119 '), (120), (120') are fixed. Then, the brushes 121 and 121 'supported by the brush supporters 119 and 119' and the brushes 122 supported by the brush supporters 120 and 120 'to the slip ring 111. And 122 'are respectively brought into contact with the slip ring 112. Reference numeral 123 denotes a protective cover.

The brushes 121, 121 'and 122, 122' are provided with the proximity switches 95 and 96 by the working pieces 93 and 94, as shown in FIG. The current is supplied from the amplifiers 97 and 98 in accordance with the signal from.

Thus, for example, when the high portions 93A, 94A of the acting pieces 93 and 94 are opposed to the erasure switches 95 and 96, the brushes 121 in the amplifiers 97 and 98 are used. , 121 'and 112 are supplied to the electro-actuators 75 and 76, and the electro-actuators 75 and 76 are subjected to a predetermined operation.

28 and 29 show a fifth embodiment of the present invention. In addition to the high portion 38A and the low portion 38B, the middle height portion 38c is provided on the cam 38 of the first embodiment described above. The tension increase of the weft yarn 6 by body compression is alleviated.

That is, the cam 38 has a middle height portion 38c which is in contact with the cam roller 46 at sea stroke, and the second hook lever when the middle height portion 38c and the cam roller 46 are in contact with each other. The connecting portion 42a of the 42 is not drawn into the drum 20, but moves in the direction of rotation of the drum 20.

In this way, in the fixing of the body, the tension of the weft yarn 6 increases, but when the intermediate height portion 38c of the cam 38 and the cam roller 46 come into contact with each other, as shown in FIG. The connecting portion 42a of the hook lever 42 slightly moves in the direction opposite to the rotational direction of the drum 20, and loosens the weft yarn 6 wound around the straight portion 20d. For this reason, the weft 6 loosened by the tension rise of the weft yarn 6 by a body pull is pulled out, and a raise of tension is alleviated.

In this way, in the body squeezing process, by increasing the weft connecting portion of the second connecting device in a direction opposite to the rotation direction of the drum, it is possible to mitigate the rise of the weft force. In the second embodiment shown in FIGS. 10 to 16, the lower portion 38'B (lower portion 38'C) is formed on the cam 38 ', followed by the lower portion 38'C (FIG. 10 dashed line). When the rocking lever 62 rotates further clockwise, the weft 6 bending angle in the guide 4 is small, so that the weft path is shortened, so that the weft tension increase angle at the time of seaming is alleviated.

In the above embodiment, the first tapered taper portion 20a having the smallest diameter portion larger than the straight portion 20d is formed on the front end side of the drum 20 so as to measure the length while pulling the weft yarn from the yarn feeding means side. This part has the same diameter as the straight portion 20d, and does not measure the length directly with the push roller, does not measure the length with this push roller, but the length measuring roller that is rotated integrally with the same axis as this push roller. You may use the well-known length measuring apparatus which winds up the weft several times between and a fixed guide, and measures the length.

As described above, in the present invention, the wefts of the weft length required for the drum are separated and wound up before wefting, so that there is no measurement non-measuring of length measurement, and the wefting speed does not change rapidly during wefting. Of course, in the air-jet loom, the consumption of pressure air can be reduced, and since the second connection part of the weft is completely inserted into the drum, the weft yarn is in contact with the drum, so it is subjected to the progress resistance. It is very small and there is no short pick, etc. In addition, after the end of wefting, the connecting part protrudes out of the drum and is connected precisely. It doesn't happen.

Claims (1)

In the weft storage device of a drumless loom, the weft yarn from the yarn feeding means is wound around a drum formed with a tapered portion having a diameter decreasing toward the gastric acid feeding means and a straight line connected thereto, and guided to the weft feeding means. A first connecting device for connecting the weft yarn on the drum at least in relation to the weaving machine is provided near the boundary between the tapered portion and the straight portion, and at least the weft insertion period in relation to the weaving machine is provided in the straight portion. A weft yarn of a drumless loom, which is constructed with a second connecting device for connecting the weft yarn on the drum, and wound up the length of the weft yarn by the weft length to the straight line between the first and second connecting devices until weft loading. Storage device.

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