JP7287126B2 - pot spinning machine - Google Patents

Description

The present invention relates to a pot spinning machine.

As one of spinning machines, a pot spinning machine using a cylindrical pot is known. In the pot spinning machine, the pot is rotated at a predetermined number of revolutions, and the yarn (fiber bundle) stretched by the drafting device is guided into the pot through the yarn guide tube to wind the yarn around the inner wall of the pot to form a cake. do. After the cake is formed, the yarn is cut upstream from the yarn guide tube, and then the bobbin is inserted into the pot and the yarn is wound back from the inner wall of the pot to the bobbin.

In a pot spinning machine, a yarn sucker is arranged upstream of a yarn guide tube, and yarn is introduced into the yarn guide tube through this sucker tube (see Patent Document 1, for example). The sucker pipe sucks the yarn sent out from the drafting device into the sucker pipe by a suction force using a swirl flow of air. In order to ensure that the yarn is sucked by the sucking pipe with less air consumption, it is desirable to dispose the sucking pipe near the bottom roller of the drafting device.

On the other hand, arranging the sucker tube near the bottom roller of the drafting device may cause the following problems.
First, a yarn sensor may be arranged near the bottom roller of the draft device. Therefore, if the sucker tube is arranged near the bottom roller, the sucker tube will enter the detection range of the yarn sensor, hindering the detection function of the yarn sensor. Also, an air suction flow path of a pneumatic nozzle may be set in the vicinity of the bottom roller. The pneumatic nozzle sucks up fiber waste and fluff generated during spinning, or yarn broken during spinning, by sucking air. Therefore, if the suction pipe is arranged near the bottom roller, the suction pipe of the air by the pneumatic nozzle is hindered by the suction pipe, and the efficiency of suction of the fiber waste by the pneumatic nozzle is lowered. In addition, if the sucker tube is arranged near the bottom roller, when the yarn fibers are wound around the bottom roller, there is a risk that the fibers will come into contact with the sucker tube.

JP-A-62-162027

However, in the conventional pot spinning machine, the sucker tube is fixed upstream of the yarn guide tube so as not to move, and the position of the sucker tube is held constant. Therefore, if the function of the yarn sensor and the suction efficiency of the pneumatic nozzle are prioritized and the suction pipe is arranged at a position away from the bottom roller of the drafting device, the success rate of suction of the yarn by the suction pipe decreases. there were. Although the suction force can be increased by increasing the amount of air injected from the suction pipe, energy loss occurs due to the increase in air consumption. In addition, if the suction pipe is arranged near the bottom roller of the drafting device in order to increase the success rate of sucking the yarn by the suction pipe, the function of the yarn sensor is hindered and the suction efficiency of the pneumatic nozzle is lowered. was there. For this reason, it was very difficult to optimize the position of the sucker tube.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pot spinning machine capable of optimizing the position of the sucker tube.

The present invention provides a pot spinning machine comprising a suction tube for sucking a yarn drawn by a drafting device, a cylindrical pot, and a yarn guide tube for guiding the yarn supplied through the suction tube into the pot. The robe tube includes a suction member that sucks the yarn by using the suction force of the swirl flow of air, an air intake member that takes the air into the suction member, and a lower end portion of the suction member that is coaxially connected to the suction member. A cylindrical member is provided to support the suction pipe so as to be movable in the central axis direction of the pot, and the positions of the suction member , the air intake member and the cylindrical member of the suction pipe are shifted from the suction position to the suction position. and a spinning position close to the pot . The position of the tubular member is arranged at the suction position, and during spinning, the positions of the suction member, the air intake member and the tubular member are arranged at the spinning position.

The pot spinning machine according to the present invention is provided with a yarn guide tube drive section capable of moving the yarn guide tube in the central axis direction of the pot, and the sucker tube drive section utilizes the driving force of the yarn guide tube drive section to suck the yarn guide tube. It is also possible to move the spinning tube from the spinning position to the suction position.

In the pot spinning machine according to the present invention, the suction tube driving section has an urging member for returning the suction tube from the suction position to the spinning position by applying an urging force to the suction tube. may

The pot spinning machine according to the present invention is provided with a yarn sensor for detecting the state of the yarn in the yarn path from the drafting device to the sucking tube, and the spinning position is set outside the detection range of the yarn sensor. good too.

The pot spinning machine according to the present invention may include a pneumatic nozzle arranged near the draft device to suck air, and the spinning position may be set outside the air suction flow path of the pneumatic nozzle.

According to the present invention, the position of the sucker tube can be optimized in the pot spinning machine.

1 is a schematic diagram showing a configuration example of a pot spinning machine according to an embodiment of the present invention; FIG. 1 is a schematic perspective view showing a configuration example of a sucker pipe and a sucker pipe driving portion in an embodiment of the present invention; FIG. FIG. 4 is a schematic side view showing a state in which the sucking pipe is arranged at the sucking position; FIG. 4 is a schematic side view showing a state in which the shin-sucking tube is arranged at the spinning position; FIG. 11 is a schematic side view showing an operating state of the sucking pipe driving section when the sucking pipe is arranged at the suction position; FIG. 5 is a schematic side view showing the operating state of the shin-pipe driving section when the shin-pipe is arranged at the spinning position;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Pot spinning machine>
FIG. 1 is a schematic diagram showing a configuration example of a pot spinning machine according to an embodiment of the present invention.
Note that FIG. 1 shows the configuration of each part of the pot spinning machine in a simplified manner, and may differ from the actual shape and dimensions.
As shown in FIG. 1, the pot spinning machine 1 includes a drafting device 10, a yarn sensor 11, a pneumatic nozzle 17, a suction tube 12, a yarn guide tube 14, a pot 15, a bobbin support 16, It has These constituent elements constitute one spindle, which is one unit of spinning. The pot spinning machine 1 has a plurality of spindles, and the configuration of one of them will be described here.

(Draft device)
The draft device 10 is a device that draws a thread material such as a roving. The draft device 10 is configured using a plurality of roller pairs including a back roller pair 21 , a middle roller pair 22 and a front roller pair 23 . The plurality of roller pairs are arranged in the order of back roller pair 21, middle roller pair 22 and front roller pair 23 from the upstream side to the downstream side in the yarn feeding direction. The back roller pair 21 is composed of a back top roller 21a and a back bottom roller 21b. The middle roller pair 22 is composed of a middle top roller 22a and a middle bottom roller 22b. The front roller pair 23 is composed of a front top roller 23a and a front bottom roller 23b.

Each roller pair 21, 22, 23 rotates according to the driving of a draft driving section, which will be described later. Comparing the number of revolutions per unit time (rpm) of the roller pairs 21, 22, 23, the number of revolutions of the middle roller pair 22 is higher than that of the back roller pair 21, and the number of revolutions of the front roller pair 23 is Higher than the rotation speed of the middle roller pair 22 . Thus, the rotation speeds of the roller pairs 21, 22, and 23 are different from each other, and the drafting device 10 draws the thread material thinly by utilizing the difference in rotation speed, that is, the difference in rotation speed.

(thread sensor)
The yarn sensor 11 is a sensor that detects the state of the yarn in the yarn path from the draft device 10 to the sucker pipe 12 . The yarn sensor 11 is arranged downstream of the draft device 10 and upstream of the shin sucker pipe 12 in the yarn feeding direction. Yarn states detected by the yarn sensor 11 include ballooning of the yarn sucked into the sucker pipe 12 and yarn breakage. Yarn ballooning refers to a phenomenon in which the yarn is swirled by the rotation of the pot 15 and thereby the yarn forms a balloon. The yarn sensor 11 is configured using, for example, an optical sensor that combines a light emitter and a light receiver.

(pneumatic nozzle)
The pneumatic nozzle 17 is one component of the pneumatic device, and sucks air from a nozzle opening 17a at the tip. The nozzle opening 17 a opens toward the yarn path from the draft device 10 to the shin sucking tube 12 . The pneumatic nozzle 17 sucks up fiber scraps and fluff generated during spinning, or yarn broken during spinning, by sucking air.

(Sucking tube)
The sucker pipe 12 sucks the yarn 18 supplied from the draft device 10 and feeds the sucked yarn 18 to the yarn guide pipe 14 . The sucker pipe 12 sucks the yarn 18 drawn by the draft device 10 into the sucker pipe 12 by utilizing the swirl flow of air. The sucker pipe 12 is movably supported in the central axis direction of the pot 15 by a sucker pipe drive unit 52 (see FIG. 2), which will be described later.

(Yarn guide tube)
The yarn guide pipe 14 guides the yarn 18 fed from the draft device 10 via the sucker pipe 12 into the pot 15 . The yarn guide tube 14 is formed in an elongated tubular shape. The shape of the yarn guide tube 14 when cross-sectioned in a direction orthogonal to the length direction is circular. The yarn guide tube 14 is arranged downstream of the draft device 10 coaxially with the sucker tube 12 and the pot 15 . The yarn guide tube 14 is inserted into the pot 15 through the upper portion of the pot 15 . The upper end of the yarn guide tube 14 opens as a yarn introduction port 14a, and the lower end of the yarn guide tube 14 opens as a yarn discharge port 14b. The yarn 18 introduced from the yarn introduction port 14 a of the yarn guide tube 14 is discharged from the yarn discharge port 14 b of the yarn guide pipe 14 . The yarn guide tube 14 is provided so as to be movable in the central axis direction of the pot 15 by a yarn guide driver (not shown).

(pot)
The pot 15 is used for forming the cake 24 and rewinding the yarn. The pot 15 is formed in a cylindrical shape. The pot 15 is provided rotatably around the central axis of the pot 15 . A central axis K of the pot 15 is arranged parallel to the vertical direction. For this reason, one side of the pot 15 in the central axis direction is upward and the other is downward. A thread guide insertion port 25 is formed on the upper end side of the pot 15 . The yarn guide tube insertion port 25 is an opening for inserting the yarn guide tube 14 into the pot 15 . An opening 26 is formed at the lower end of the pot 15 .

(bobbin support)
The bobbin support portion 16 supports the bobbin 30 . The bobbin support portion 16 has a bobbin base 31 and a bobbin mounting portion 32 . The bobbin pedestal 31 is formed in a plate shape. The bobbin mounting portion 32 is fixed to the bobbin base 31 . The bobbin mounting portion 32 is formed in a columnar shape and arranged to protrude upward from the upper surface of the bobbin base 31 .

FIG. 2 is a schematic perspective view showing a configuration example of a sucker tube and a sucker tube driving section according to the embodiment of the present invention.
First, the structure of the sucker pipe 12 will be described.
A plurality of shin-removing pipes 12 are attached to a shin-removing pipe rail 60 at predetermined intervals corresponding to the positions of the respective spindles of the pot spinning machine 1 . The suction pipe 12 includes a suction member 121 , an air intake member 122 and a tubular member 123 . The suction member 121 , the air intake member 122 and the cylindrical member 123 are integrally assembled to form one suction pipe 12 .

The suction member 121 is a member that sucks the thread 18 by utilizing the suction force of the swirling flow of air. A suction hole (not shown) is formed inside the suction member 121 . This suction hole is formed so as to pass through the suction member 121 in the central axis direction. The air intake member 122 is fixed to the upper surface of the sucker pipe rail 60 . The air intake member 122 is a member that takes in the air sent through the air joint 62 and the air pipe 63 into the interior of the sucker pipe 12 . A swirl flow of air is formed by the air taken in by the air taking member 122 . The cylindrical member 123 is coaxially connected to the lower end of the suction member 121 . A communicating hole (not shown) communicating with the suction hole of the suction member 121 is formed inside the cylindrical member 123 . The yarn 18 sucked into the suction member 121 by utilizing the swirl flow of air is delivered to the yarn guide tube 14 through the suction hole of the suction member 121 and the communicating hole of the tubular member 123 .

Next, the configuration of the sucker tube driving section 52 will be described.
The sucker tube drive unit 52 supports the sucker tube 12 so as to be movable in the central axis direction (vertical direction) of the pot 15, and positions the sucker tube 12 between a first position and a second position closer to the pot 15 than that. It is switchable between two positions. In this embodiment, as an example, a case where the first position is the suction position and the second position is the spinning position will be described.
FIG. 3 is a schematic side view showing a state in which the sucking tube is arranged at the suction position, and FIG. 4 is a schematic side view showing a state in which the sucking tube is arranged at the spinning position.
When the yarn 18 sent out from the draft device 10 is sucked by the sucking pipe 12, the sucking pipe driving section 52 arranges the sucking pipe 12 at the sucking position P1. Further, when the yarn 18 sucked into the sucking pipe 12 is spun into the pot 15 via the yarn guide pipe 14, the sucking pipe driving section 52 arranges the sucking pipe 12 at the spinning position P2. .

The suction position P1 is a position suitable for sucking the yarn. 3, it is set close to the front bottom roller 23b. When the sucker tube 12 is arranged at the suction position P1, the distance L1 between the front bottom roller 23b and the sucker tube 12 is preferably set to about 1 mm.

On the other hand, the spinning position P2 is a position suitable for yarn spinning and is set closer to the pot 15 than the suction position P1. Therefore, as shown in FIG. 4, the spinning position P2 is set below the suction position P1 (on the downstream side in the yarn feeding direction), that is, at a position away from the front bottom roller 23b. The spinning position P2 is preferably set at a position outside the detection range of the yarn sensor 11 if it is defined by the positional relationship between the sucker tube 12 and the yarn sensor 11 . Further, if the spinning position P2 is defined by the positional relationship between the sucking tube 12 and the pneumatic nozzle 17, it is preferable to set the position outside the air suction flow path of the pneumatic nozzle 17. The air suction flow path of the pneumatic nozzle 17 is an air flow path formed across the yarn path between the front bottom roller 23b and the sucking tube 12 when air is sucked from the nozzle opening 17a of the pneumatic nozzle 17. It means flow path. When the shin sucking tube 12 is arranged at the spinning position P2, the distance L2 between the front bottom roller 23b and the shin sucking tube 12 is preferably set to 4 mm or more.

The sucker pipe drive unit 52 includes a mechanism for moving up and down the sucker pipe 12, and as shown in FIG. , a rod 67 supported vertically by a fixed rail 66, a spring 68 attached to the rod 67, a stopper 69 attached to the rod 67 at a position different from the spring 68, and a lower end portion 67b of the rod 67. It has an attached abutment member 70 and an elevating rail 71 provided so as to be vertically movable.

The fixed rail 66 is a rail-shaped member extending in the longitudinal direction of the sucker pipe rail 60 . A guide hole (not shown) is formed in the fixed rail 66 to support the rod 67 so as to be vertically movable. A bearing is attached to this guide hole as needed. The fixed rail 66 is arranged between the spring 68 and the stopper 69 in the central axis direction of the rod 67 . Further, the fixed rail 66 is formed with a relief hole, a notch, or the like for avoiding positional interference between the suction pipe 12 and the tubular member 123 .

The rod 67 is arranged parallel to the tubular member 123 of the shinobi tube 12 . An upper end portion 67 a of the rod 67 is fixed to the sucker pipe rail 60 . Therefore, when the rod 67 moves vertically while being supported by the fixed rail 66 , the sucker tube rail 60 and the sucker tube 12 move vertically together with the rod 67 . A lower end portion 67b of the rod 67 has a partially increased diameter.

A spring 68 is wound around the shaft of the rod 67 . The spring 68 is composed of a compression coil spring. The upper end of the spring 68 is in pressure contact with the lower surface of the fixed rail 66 , and the lower end of the spring 68 is in pressure contact with the lower end 67 b of the rod 67 . The force of the spring 68 acts as an urging force that urges the rod 67 downward, and the stopper 69 is pressed against the upper surface of the fixed rail 66 by this urging force.

A stopper 69 is fixed to the shaft of the rod 67 . The stopper 69 is pressed against the fixed rail 66 by the biasing force of the spring 68 to define (position) the position of the rod 67 in the vertical direction and the positions of the sucker pipe rail 60 and the sucker pipe 12 . .

The abutting member 70 is a portion against which the elevating rail 71 abuts. The abutting member 70 is arranged to protrude below the lower end portion 67 b of the rod 67 . The projecting dimension of the abutting member 70 based on the position of the lower end portion 67b of the rod 67 is adjustable. As a mechanism for adjusting the projecting dimension of the abutment member 70, for example, a screw hole (not shown) is formed in the lower end portion 67b of the rod 67 along the central axis of the rod 67, and a male screw corresponding to the screw hole is formed. (not shown) may be formed on the abutting member 70 . According to this adjustment mechanism, the male thread of the abutment member 70 is screwed into the threaded hole of the rod 67, and in this state, the abutment member 70 is rotated. can be used to adjust the projecting dimension of the abutting member 70 . Further, by providing such an adjustment mechanism, it becomes possible to adjust (finely adjust) the suction position P1.

The elevating rail 71 is an elongated member extending in the longitudinal direction of the sucker pipe rail 60 and arranged below the fixed rail 66 . The elevating rail 71 is arranged so as to face the abutment member 70 in the vertical direction. The elevating rail 71 is preferably configured by a yarn guide rail that supports the yarn guide 14 . The yarn guide rail is a constituent element of the yarn guide tube driving section that moves (lifts) the yarn guide tube 14 in the vertical direction. Moving. When the elevating rail 71 is configured by the yarn guide rail, the number of parts can be reduced compared to the case where the elevating rail 71 is provided separately from the yarn guide rail. In addition, since the yarn guide tube drive section has a drive mechanism for vertically moving the yarn guide tube 14 together with the yarn guide rail, the driving force of this drive mechanism is used to operate the sucker tube drive section 52. can be made In this embodiment, the elevating rail 71 is configured by a yarn guide rail. For this reason, the elevating rail 71 is referred to as the yarn guide rail 71 in the following description. The yarn guide rail 71 is provided movably in the vertical direction by a drive mechanism using a cylinder, a motor, or the like as a drive source, for example.

Next, the operation of the pot spinning machine according to the embodiment of the invention will be described.
The operation of the pot spinning machine 1 includes a drawing step S1, a cake forming step S2 and a rewinding step S3.

The stretching step S1 is a step of stretching a thread material such as a roving. The cake forming step S2 is a step of winding the yarn stretched in the stretching step S1 around the inner wall 27 of the pot 15 to form a cake 24. FIG. The rewinding step S<b>3 is a step of rewinding the yarn forming the cake 24 onto the bobbin 30 . The operation of the pot spinning machine 1 based on each step will be described below. The operation of the pot spinning machine 1 described below is executed by controlling the operation of each part of the pot spinning machine 1 by a control section (not shown) of the pot spinning machine 1 .

(stretching step)
In the stretching step S1, the back roller pair 21, the middle roller pair 22, and the front roller pair 23 provided in the drafting device 10 are each rotated at a predetermined number of rotations, so that the thread material such as roving is drawn to a predetermined thinness. is stretched and transported. The yarn 18 thus stretched is sucked into the sucker tube 12 and then introduced into the yarn guide tube 14 through the yarn inlet 14a.

At this time, prior to the start of the stretching step S1, the sucker tube 12 is placed at the sucking position P1 by raising the yarn guide rail 71. As shown in FIG. In this case, the operation of the sucker tube driving section 52 is as follows.
First, when the yarn guide rail 71 rises, the upper surface of the yarn guide rail 71 abuts against the abutting member 70 . At this time, the yarn guide rail 71 pushes up the rod 67 against the biasing force of the spring 68 . Then, the spring 68 is compressed by pushing up the rod 67 and the stopper 69 is separated from the fixed rail 66 . Further, the sucker pipe rail 60 and the sucker pipe 12 are lifted integrally with the rod 67 . As a result, the sucking tube 12 moves from the spinning position P2 to the sucking position P1. The upward movement of the yarn guide tube rail 71 stops when the sucker tube 12 reaches the sucking position P1. At this time, the yarn outlet 14b of the yarn guide tube 14 is arranged at a preset winding start height H1 (see FIG. 1). The winding start height H1 is the height at which the yarn 18 discharged from the yarn discharge port 14b of the yarn guide tube 14 starts winding around the inner wall 27 of the pot 15. FIG.

When the stretching step S1 is started after the sucking tube 12 is placed at the suction position P1 in this manner, the sucking member of the sucking tube 12 is placed near the front bottom roller 23b of the draft device 10 as shown in FIG. 121 are arranged. Therefore, the yarn 18 sent out by the front roller pair 23 can be reliably sucked into the shinobi tube 12 with less air consumption. However, if the cake forming step S2 is performed while the suction pipe 12 is placed at the suction position P1, the detection function of the yarn sensor 11 is hindered and the suction efficiency of the pneumatic nozzle 17 is lowered.

Therefore, at the stage when the yarn 18 is sucked into the yarn sucking pipe 12 (the stage when a predetermined time has passed since the stretching step S1 was started), the yarn sucking pipe 12 is moved down to the spinning position P2 by the downward movement of the yarn guide pipe rail 71. placed in In this case, the operation of the sucker tube driving section 52 is as follows.
First, when the yarn guide rail 71 descends, the rod 67 is pushed down by the biasing force of the spring 68 . Then, the sucker pipe rail 60 and the sucker pipe 12 descend together with the rod 67 . The descent of the sucker pipe 12 stops when the stopper 69 hits the fixed rail 66 . As a result, the sucker tube 12 moves from the suction position P1 to the spinning position P2. At this time, the yarn outlet 14b of the yarn guide tube 14 is arranged at the preset stacking start height H2 (see FIG. 1). The stacking start height H2 is the height at which the yarn 18 discharged from the yarn discharge port 14b of the yarn guide tube 14 is stacked on the inner wall 27 of the pot 15 and the formation of the cake 24 starts.

When the cake forming step S2 is performed after arranging the sucking tube 12 at the spinning position P2, as shown in FIG. Twelve suction members 121 are arranged. As a result, the sucker pipe 12 is arranged outside the detection range of the yarn sensor 11, so that the detection function of the yarn sensor 11 is not hindered. Further, since the suction pipe 12 is arranged at a position separated from the air suction flow path of the pneumatic nozzle 17, the suction efficiency of the pneumatic nozzle 17 is not lowered. Further, by arranging the sucking tube 12 at the spinning position P2, the function of the pneumatic device having the pneumatic nozzle 17 can be fully exerted, yarn defects can be prevented and yarn breakage can be reduced, and the fiber bundle when yarn breaks can be obtained. can be rapidly aspirated. Further, even when the yarn fibers are wound around the front bottom roller 23b, a sufficient separation distance is ensured between the front bottom roller 23b and the sucking tube 12.例文帳に追加Therefore, the fibers wound around the front bottom roller 23b are less likely to come into contact with the shinobi tube 12, and damage to the front bottom roller 23b and the shinobi tube 12 can be suppressed. Further, when the shin-suction tube 12 is arranged at the spinning position P2, compared with the case where it is arranged at the suction position P1, the winding angle of the yarn 18 with respect to the suction member 121 becomes smaller. By applying a sufficient twist to the yarn 18 positioned at , the yarn strength can be increased and the occurrence of yarn breakage can be suppressed.

In FIG. 6, the upper surface of the yarn guide rail 71 is in contact with the abutting member 70, but in the cake forming step S2 described later, when the yarn guide rail 71 and the yarn guide pipe 14 are moved downward, , the upper surface of the yarn guide rail 71 is separated from the abutting member 70 as shown in FIG. In this state, the stopper 69 abuts against the upper surface of the fixed rail 66 to position the sucker tube 12 at the spinning position P2.

In the cake forming step S2, the position of the yarn guide tube 14 is moved downward step by step while the yarn guide tube 14 is reciprocally moved in the vertical direction repeatedly at a predetermined cycle by driving the yarn guide driving unit. As a result, the yarn 18 is wound around the inner wall 27 of the pot 15, and the yarn 18 is stacked while the winding position is shifted to form the cake 24. As shown in FIG. The formation of the cake 24 ends when the thread is cut. When thread trimming is to be performed, both the rotation of the back roller pair 21 and the middle roller pair 22 are stopped while the rotation of the front roller pair 23 is continued. As a result, the yarn 18 is forcibly cut downstream of the middle roller pair 22 .

On the other hand, in the rewinding step S3, the yarn guide rail 71 is raised to move the yarn guide tube 14 upward, and the bobbin pedestal 31 is raised to move the bobbin 30 and the thread untangling member 33 upward. The bobbin 30 is thereby arranged in the pot 15 . In addition, the upper end portion of the thread loosening member 33 contacts the end portion 24b of the cake 24 on the winding end side. As a result, the yarn forming the cake 24 is loosened, and the loosened yarn separates from the inner wall 27 of the pot 15 and begins to wind around the bobbin 30 . Thereafter, when all the yarn forming the cake 24 is wound back onto the bobbin 30, the bobbin pedestal 31 is lowered to move the bobbin 30 and the yarn untangling member 33 downward.

Thereafter, the rewound bobbin 30 is removed from the bobbin mounting portion 32 and an empty bobbin 30 is mounted on the bobbin mounting portion 32 . Also, the sucker tube 12 is placed at the sucking position P1 before the next stretching step S1 starts. Thereafter, operations similar to those described above are repeated.

<Effects of Embodiment>
As described above, in the pot spinning machine according to the embodiment of the present invention, the suction tube 12 is movably supported in the central axis direction of the pot 15, and the position of the suction tube 12 is aligned with the suction position P1. It is configured to include a sucker tube driving portion 52 that can be switched to the extended position P2. For this reason, when the yarn stretched by the drafting device 10 is sucked into the sucking pipe 12, the sucking pipe 12 is arranged at the suction position P1 suitable for it, and when the yarn is spun into the pot, the A sucking tube 12 can be arranged at the spinning position P2. Therefore, the position of the sucker tube 12 can be optimized.

Further, in the embodiment of the present invention, a configuration is adopted in which the driving force of the yarn guide tube drive section is used to move the sucking tube 12 from the spinning position P2 to the sucking position P1. This makes it possible to simplify the configuration of the pot spinning machine as compared with the case where a dedicated drive mechanism is provided for the sucker tube drive section 52 .

In addition, in the embodiment of the present invention, a configuration having a spring 68 is adopted to return the shin-sucking tube 12 from the suction position P1 to the spinning position P2 by applying a biasing force to the slick-sucking tube 12. . As a result, the suction tube 12 can be returned to the spinning position P2 more reliably than in the case where the suction tube 12 is returned from the suction position P1 to the spinning position P2 by its own weight. .

In addition, in the embodiment of the present invention, the spinning position P2 is set outside the detection range of the yarn sensor 11. Therefore, while the yarn 18 is being spun from the yarn guide tube 14 into the pot 15, The function of the sucker pipe 12 is not hindered by the sucker pipe 12.例文帳に追加

In the embodiment of the present invention, the spinning position P2 is set outside the air suction channel of the pneumatic nozzle 17, so the yarn 18 is spun from the yarn guide tube 14 into the pot 15. During this time, the suction efficiency of the pneumatic nozzle 17 does not decrease.

<Modifications, etc.>
The technical scope of the present invention is not limited to the above-described embodiments, but also includes forms with various modifications and improvements within the range where specific effects obtained by the constituent elements of the invention and their combinations can be derived.

For example, in the above embodiment, the sucker tube 12 and the yarn guide tube 14 are configured separately, but this is not the only option, and the sucker tube 12 and the yarn guide tube 14 are integrated. may be When this configuration is adopted, the spinning position P2 of the shin sucking tube 12 is not fixed, but fluctuates according to the up-and-down motion of the yarn guide tube 14. As shown in FIG.

Also, in the above embodiment, the spring 68 is used as the biasing member, but the present invention is not limited to this, and an elastic member such as rubber may be used. Alternatively, a configuration may be adopted in which the sucking tube 12 returns (lowers) from the suction position P1 to the spinning position P2 by its own weight without providing an urging member. However, it is preferable to provide an urging member in order to reliably return the sucker tube 12 to the spinning position P2.

1 pot spinning machine 10 draft device 11 yarn sensor 12 sucking tube 14 yarn guiding tube 15 pot 17 pneumatic nozzle 18 yarn 52 sucking tube drive unit P1 suction position (first position) P2 Spinning position (second position).

Claims (5)

a suction tube that sucks the yarn drawn by the draft device;
a cylindrical pot;
a yarn guide tube that guides the yarn supplied through the sucker tube into the pot;
In a pot spinning machine comprising
The sucking pipe is
a suction member that sucks the yarn by using the suction force of the swirl flow of air;
an air intake member that takes air into the interior of the suction member;
A cylindrical member coaxially connected to the suction member is provided at the lower end of the suction member,
The suction tube is movably supported in the central axis direction of the pot, and the positions of the suction member, the air intake member, and the cylindrical member of the suction tube are adjusted to the suction position and the pot relative to the suction position. Equipped with a suction tube drive that can be switched between the spinning position close to the
When the yarn sent out from the drafting device is sucked by the sucking pipe, the sucking pipe drive unit positions the sucking member, the air intake member and the cylindrical member at the sucking position, A pot spinning machine, wherein the suction member, the air intake member and the cylindrical member are arranged at the spinning position during spinning. a yarn guide driving section capable of moving the yarn guide tube in the central axis direction of the pot;
2. The pot spinning machine according to claim 1, wherein the shin-sucking tube drive section uses the driving force of the yarn guide tube-driving section to move the shin-sucking tube from the spinning position to the suction position. 3. The sucker tube drive unit according to claim 1, further comprising a biasing member that applies a biasing force to the sucker tube to return the sucker tube from the suction position to the spinning position. pot spinning machine. a yarn sensor for detecting the state of yarn in a yarn path from the draft device to the sucking pipe;
The pot spinning machine according to any one of claims 1 to 3, wherein the spinning position is set outside the detection range of the yarn sensor. Equipped with a pneumatic nozzle that is arranged near the draft device and sucks air,
The pot spinning machine according to any one of claims 1 to 4, wherein the spinning position is set outside the air suction channel of the pneumatic nozzle.

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