JP3114429B2 - Roof dripping prevention device of roving yarn changer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin (hereinafter referred to as a small ball bobbin) which moves along the longitudinal direction of a frame of a spinning machine and is used by a roving yarn suspended on a bobbin hanger of a creel.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roving sagging prevention device for a roving yarn changer including a bobbin exchange device for exchanging a roving yarn suspended from an auxiliary roving winding rail.

[0002]

2. Description of the Related Art In a spinning machine, particularly a ring spinning machine, a roving yarn is drawn from a roving winding (shinomaki) suspended from a creel and supplied to a draft part below. As the supply of the roving to the draft part progresses and the roving becomes empty or nears empty, it is necessary to replace it with a new roving. There has been proposed a roving yarn changer (shino changer) that automatically performs this replacement work (for example, Japanese Patent Application Laid-Open No. Sho 60-71724). In addition, a roving yarn changer equipped with a roving yarn splicing device for automatically performing a roving yarn splicing operation in addition to automatically replacing a spare roving winding and a small ball bobbin has also been proposed (for example, Japanese Patent Laid-Open No. Hei 2 -12736
No. 8, etc.). These roving yarn changers take up the small bobbin from the creel by lifting and lowering and moving the pair of exchange arms forward and backward, and hang them on the spare roving winding rail. It acts to hang on creels. Then, at the time of roving replacement, after cutting the roving being spun, the small bobbin is taken out from the creel. That is,
About one layer of roving remains on the small bobbin.

The small bobbin suspended on the spare roving winding rail waits for transportation to the roving process in that state, during which the small bobbin blows out from the traveling cleaner reciprocating along the longitudinal direction of the spinning frame. Is affected by
If the end of the roving that has been robbed during the roving change is in a state of hanging down from the small bobbin, the roving of the small bobbin is unraveled and droops further by the action of the blowing airflow, and the spinning is performed. There is a problem that the yarn is entangled with the yarn inside and causes yarn breakage. Further, even if the yarn is not broken during the standby, the roving yarn is further unraveled during the transportation to the roving process, which causes troubles such as entanglement with other parts.

In order to solve these problems, Japanese Patent Laid-Open Publication No. Sho 62
In Japanese Patent No. 51577, a roving machine is provided with a rubbing plate at a predetermined position of a roving yarn changer. A method of rotating in a hanging state is disclosed.

Japanese Patent Laid-Open Publication No. Sho 62-268829 proposes a roving sagging prevention device as shown in FIG.
In this device, a bobbin exchange arm 61 provided in a roving yarn changer is provided.
A support member 62 is provided on the upper part of the device, and a peg 63 is rotatably provided on the support member 62. The peg 63 is positively driven by a motor 64. A contact member 65 is provided on the support member 62 at a position near the outer periphery of the small bobbin (remaining yarn bobbin) U inserted into the peg 63 so as to extend in the longitudinal direction without contact with the small bobbin. When removing the small bobbin U from the creel and suspending the small bobbin U from the creel, the peg 63 is rotated while the small bobbin U is inserted into the peg 63,
The roving R hanging from the small bobbin U is wound around the small bobbin U. At this time, the portion of the small ball bobbin U that has not been wound yet contacts the contact member 65 due to the centrifugal force caused by the rotation of the small ball bobbin U, thereby raising the roving surface and increasing the bonding force between the roving yarns. Further, since a part of the roving R is wound in a state of being in contact with the contact member 65, a tension is generated at the time of winding, and a bonding force between the rovings at the time of winding is increased.

[0006]

However, Japanese Unexamined Patent Publication No. Sho 62
In the method of JP-A-51577, it is necessary to provide a step of winding a roving from a small bobbin while pressing it against the small bobbin in the middle of a roving bobbin replacement cycle, and one roving replacement cycle becomes longer by that amount. There is a problem. Also, after the roving is wound around the small bobbin, in order to suspend the small bobbin on the bobbin hanger of the spare roving winding rail, when the small bobbin is moved upward, the replacement head supporting the small bobbin is stroked. It must be moved around the plate. As a result, there is a problem that control is complicated.

On the other hand, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 62-268829, the roving yarn R is taken up while the support member 62 is moving, so that one roving yarn exchange cycle becomes longer. Absent. However, since the contact member 65 is arranged at a position distant from the small bobbin U inserted into the peg 63, the end of the roving R cannot be reliably pressed against the small bobbin U. Therefore, in the case of a yarn having a small amount of fluff, such as a polyester-rayon blended yarn, the winding of the roving end may be insufficient, and the roving of the small bobbin is unraveled by the action of the airflow blown out from the traveling cleaner. It may be in a hanging state.

The present invention has been made in view of the above problems, and an object of the present invention is to make sure that a roving end hanging from a small bobbin taken out of a creel does not extend a single roving exchange cycle. To provide a roving sagging prevention device of a roving yarn changer that can be wound around a small ball bobbin.

[0009]

According to the present invention, there is provided a spinning machine which moves along a longitudinal direction of a frame of a spinning machine.
In a roving yarn changer equipped with a bobbin exchange device for exchanging a bobbin after use of a roving suspended on a bobbin hanger of a creel and a spare roving wound on a preliminary roving winding rail,
It is disposed behind the bobbin changing device in the moving direction during the roving operation of the roving yarn changing machine, and is incapable of contacting with the working position where it can contact the outer periphery of the bobbin after using the roving suspended on the spare roving winding rail. A roving yarn holding member movable to a standby position, a driving unit for moving the roving yarn pressing member to an operation position and a standby position, and movement of the bobbin changing device during roving operation of the roving yarn changing machine. A support member disposed so as to be able to move up and down on the rear side in the direction, a bobbin support member rotatably disposed on the support member and fittable into the bottom of the bobbin, and a drive for positively rotating the bobbin support member An operating position in which the bobbin support is inserted into the bottom of the used bobbin suspended by the preliminary roving winding rail, and the bobbin support is rotatably driven, and a standby position in which the bobbin cannot be engaged with the bobbin. And lifting means for moving to I was painting.

[0010]

In the present invention, the bobbin changing device moves the roving yarn changing machine along the longitudinal direction of the spinning frame, removes the small bobbin from the creel, and suspends the bobbin on the spare roving winding rail. After the small bobbin is hung on the spare roving winding rail by the action of the bobbin changing device, the supporting member is moved upward by the operation of the lifting / lowering means of the roving prevention device, and the bobbin support is inserted into the bobbin bottom and the bobbin. It is arranged at a position where the bobbin is slightly raised. In this state, the roving holding member is disposed at an operating position where the roving holding member comes into contact with the outer periphery of the bobbin, and the bobbin support is rotationally driven by the driving means to rotate the bobbin in the roving winding direction. Then, the roving end in a hanging state without being completely wound around the small bobbin is wound around the small bobbin while being pressed against the outer periphery of the small bobbin by the pressing member. As a result, the roving end is reliably entangled with the roving remaining on the small bobbin, and the roving of the small bobbin is prevented from being unraveled and sagged even under the action of the airflow blown from the traveling cleaner.

[0011]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 2, two rows of inner and outer roving winding rails 3 and 4 are provided on the left and right sides (only one side is shown) of the creel 2 of the spinning machine 1 in the machine longitudinal direction (direction perpendicular to the paper surface). They are arranged in parallel. A support rail 5 is disposed between the roving winding rails 3 and 4 in parallel with the machine base longitudinal direction. Each of the roving winding rails 3 and 4 is provided with a bobbin hanger 6 at a predetermined interval which is twice the spindle pitch, and a roving thread R drawn from a roving winding suspended on the bobbin hanger 6 passes through a roving thread guide 7 and a draft part 8.
It is supplied to. A support bracket 9 extends outward from the creel 2, and a transport rail 10 serving as a preliminary roving winding rail is provided at the tip of the supporting bracket 9.
4 is extended in parallel. A bobbin transport body 11 is supported on the transport rail 10 so as to be able to travel, and the bobbin transport body 11 is equipped with a bobbin hanger 11a. The preliminary roving winding (full bobbin F) is suspended from the bobbin hanger 11a to form a preliminary roving winding row.

The roving yarn changer 12 moves along the longitudinal direction of the machine frame of the spinning machine 1 and uses a roving bobbin suspended on a bobbin hanger 6 of a creel 2 (hereinafter referred to as a small bobbin).
A roving yarn changing operation for replacing U with a preliminary roving winding (full bobbin) F suspended on the transport rail 10 is performed. Roving machine 12
Is not equipped with a roving splicing device, but automatically replaces the small bobbin U with the full bobbin F, and the roving splicing operation is performed manually. In the spinning machine, spinning is started in a state in which the middle roving and the full bobbin are suspended on the roving winding rails 3, 4 every other set along the longitudinal direction. Then, as shown in FIG. 3, the middle ball roving becomes a small ball bobbin U which is almost empty,
When the full bobbin becomes the middle ball roving winding M, roving replacement is performed.

As shown in FIG. 3, the roving yarn changer 12 is equipped with a bobbin changing device 15 including a full bobbin transferring device 13 and a small bobbin transferring device 14.
Numeral 3 is disposed on the front side in the moving direction at the time of the roving yarn changing operation from the small ball bobbin transfer device 14. A roving sagging prevention device 16 is disposed behind the bobbin replacing device 15 in the moving direction (left direction in FIG. 3) during roving replacement. The full bobbin transfer device 13 and the small bobbin transfer device 14 are basically configured in substantially the same manner as that disclosed in Japanese Patent Application Laid-Open No. 61-119728 previously proposed by the present applicant. However, JP-A-61-
In the apparatus disclosed in Japanese Patent Application Laid-Open No. 119728/1992, the pegs provided on both transfer devices cannot be rotated.
It is configured to be rotatable similarly to the device disclosed in Japanese Patent No. 829.

Each of the bobbin transfer devices 13 and 14 is provided with a pair of bobbin exchange arms (not shown) composed of a link mechanism on base plates 17 and 18, and has bobbin 19a and 20a at the tip of the bobbin exchange arm. Support plates 19 and 20 are provided. Then, the bobbin hangers 6 of the roving winding rails 3 and 4 and the bobbin transporter 11 are rotated by the rotation and elevating movement of the base plates 17 and 18 and the back and forth movement of the bobbin exchange arm.
The small bobbin U and the full bobbin F are transferred to and from the bobbin hanger 11a.

The roving prevention device 16 is a bobbin hanger 11
A small bobbin rotating device 21 for rotating a small bobbin U suspended from a, and a roving end pressing device 22 are provided. As shown in FIG. 1 and FIG.
Shaft 23 constituting the elevating mechanism of FIG.
It is slidably supported in the vertical direction via a guide bracket 23a fixed to the second frame. A rack and pinion type linear head 26 driven by a motor 25 is fixed below the guide bracket 23a. The upper end of the drive rod 26 a of the linear head 26 is connected to the elevating shaft 23 via the connection plate 24. A dog 24 a protrudes from the lower surface of the connection plate 24. The motor 25 and the linear head 26 constitute elevating means.

A support plate 27 as a support member is fixed to an upper end of the elevating shaft 23. A pair of rotating shafts 28 are rotatably supported on the support plate 27 so as to protrude from the upper and lower sides of the support plate 27, and a peg 29 as a bobbin support is fixed on the upper part thereof so as to be integrally rotatable. A pulley 30 is fixed to the lower part of both rotating shafts 28 so as to be integrally rotatable. A motor 31 is fixed to the upper surface of the support plate 27, and its drive shaft 31 a projects below the lower surface of the support plate 27. Drive shaft 31
a, a pulley 32 is fixed so as to be integrally rotatable.
Peg 2 via belt 33 wound between 2 and 30
9 rotates integrally with the rotation shaft 28.
The roving yarn changer 1 is located at a predetermined position where the bobbin changing device
2 is stopped, the position of both pegs 29 is determined by the small ball bobbin transfer device 14 during the previous operation.
The small bobbin U suspended from 1a and both pegs 29 are set to face each other.

On the support plate 27, sensors S1 and S2 for detecting the small bobbin U fitted to the peg 29 are mounted via support pieces 34. Sensor S1, S2
Outputs an on signal when the small bobbin U is fitted to the peg 29.

The driving rod 26a of the linear head 26
Moves the support plate 27 between the operating position and the standby position by driving the motor 25. Support plate 27
Is placed in the operating position, the peg 29 is fitted into the bottom of the small bobbin U suspended from the bobbin hanger 11a, and holds the small bobbin U at a slightly raised position.
In a state where the support plate 27 is located at the standby position, the peg 29 is held in a state in which it cannot be engaged with the small bobbin U suspended on the bobbin hanger 11a. Guide bracket 2
3a, a sensor S3 for detecting the dog 24a is provided.
S4 is attached. The sensor S3 detects the dog 24a when the support plate 27 is located at the operation position and outputs an ON signal, and the sensor S4 outputs the ON signal.
Is located at the standby position, the dog 24a is detected and an ON signal is output.

The roving end holding device 22 is disposed behind the small bobbin rotating device 21, and a rotating shaft 36 is rotatably supported by a support bracket 35 fixed to the upper surface of the frame of the roving changer 12. . The rotating shaft 36 is a bobbin hanger 11a
Below the lower end of the small bobbin U suspended in parallel with the moving direction of the roving yarn changer 12 during operation.
At both ends of the rotating shaft 36, support levers 37 constituting a roving holding member are fixed at their base ends so as to be integrally rotatable. A holding piece 38 made of urethane rubber is fixed to the support lever 37. When the support lever 37 is disposed at a position where the support lever 37 extends in the vertical direction,
The small bobbin U suspended from the bobbin hanger 11a is fixed so as to be able to contact the outer periphery of the bobbin U. As shown in FIG. 5, the pressing piece 38 does not abut on the outer periphery of the small bobbin U along the normal line, but abuts on the normal line.

A pulley 39 is located near the first end of the rotating shaft 36.
Are fitted so as to be integrally rotatable. Support bracket 35
A motor 40 is disposed at the rear, and a belt 42 is wound around a pulley 41 and a pulley 39 that are integrally rotatably fitted to a drive shaft 40 a of the motor 40. Motor 40
Is configured to be capable of driving in the forward and reverse directions, and the rotating shaft 36 is rotated in the forward and reverse directions by the forward and reverse rotation of the motor 40, and
Are moved and arranged between an operation position where the outer periphery of the small bobbin U suspended on the bobbin hanger 11a can be contacted and a standby position where the contact is not possible. Rotating shaft 36, motor 40, pulleys 39 and 41
The belt 42 constitutes driving means for moving the pressing piece 38 between the operating position and the standby position.

Further, as shown in FIG.
Detected members 43 and 44 are provided at the locations so as to be integrally rotatable. The sensors S5 and S6 for detecting the detected portions of the detected members 43 and 44 are fixed at predetermined positions via mounting pieces (not shown) fixed to the support bracket 35. The sensor S5 detects the detected portion of the detected member 43 when the holding piece 38 is located at the operation position and outputs an ON signal, and the sensor S6 detects when the holding piece 38 is located at the standby position. The on-signal is output by detecting the detected portion of the member 44.

Next, the operation of the device configured as described above will be described. In the spinning machine, spinning is started in a state in which the middle ball roving M and the full bobbin F are suspended from the roving winding rails 3, 4 every other set along the longitudinal direction. Then, when the middle bobbin M becomes the small bobbin U which is almost empty and the full bobbin F becomes the middle bobbin M, the roving is changed. When the roving change time comes, the roving change machine 12 runs from one end of the spinning frame, intermittently stops at a predetermined roving change position, and performs roving change work.

At the time of the roving change operation, similarly to the known roving changer 12, the small bobbin transfer device 14 is first operated to place the peg 20a at the position facing the small bobbin U suspended on the bobbin hanger 6 of the creel 2. Placed in Further, the full bobbin transfer device 13 is disposed at a position where the peg 19a faces the full bobbin F suspended on the bobbin hanger 11a. Then, the roving yarn R connected from the small bobbin U to the draft part 8
Is cut by the cutting device mounted on the small ball bobbin transfer device 14, and then both bobbin transfer devices 13 and 14 are moved up and down. As a result, the full bobbin F and the small bobbin U are removed from the bobbin hangers 11a and 6 and the pegs 19 of the full bobbin transfer device 13 and the small bobbin transfer device 14, respectively.
a, 20a. Also, the small ball bobbin transfer device 14
The peg 20a is rotated near the start of the descent of the bobbin U, and the small bobbin U is rotated integrally with the small bobbin U.
Is wound around the small bobbin U. At this time, when the roving thread R is engaged with the roving thread guide 7,
The roving yarn R is reliably wound around the small bobbin U with the rotation of the peg 20a. However, after the roving thread R is separated from the roving thread guide 7, the roving thread end is in a free state, and the roving thread R is loosely wound around the small ball bobbin U, and the roving thread end is slightly hung.

After the lowering of both bobbin transfer devices 13 and 14, the small bobbin transfer device 14 is operated to operate the small bobbin U.
The support plate 20 returns to a position corresponding to the bobbin hanger 11a that is suspended extra at the end of the preliminary roving winding row. Next, the full bobbin transfer device 13 is operated, and the peg 19a supporting the full bobbin F is moved to a position where the small bobbin U is removed. In this state, the bobbin transfer devices 13 and 14 are again used.
Is moved up and down, and the full bobbin F is hung on the bobbin hanger 6 and the small bobbin U is hung on the bobbin hanger 11a. Next, the support plate 19 of the full bobbin transfer device 13 returns to the original position, and one cycle of roving thread replacement is completed.

Next, when the roving yarn changer 12 moves to the next work position, as shown in FIGS.
Is in a state of facing the small bobbin U suspended on the bobbin hanger 11a during the previous operation. In this state, the robbing yarn changing operation is performed by the bobbin changing device 15 in the same manner as described above. On the other hand, at the same time as the start of the roving replacement operation, the roving sagging prevention device 16 is operated. First, the motor 25 is driven to rotate forward to move the drive rod 26a upward, and accordingly, the support plate 27 is moved upward together with the elevating shaft 23 from the standby position indicated by a chain line in FIG. When the peg 29 is fitted to the bottom of the small bobbin U suspended from the bobbin hanger 11a and reaches a position where the small bobbin U is slightly raised from the free suspended state, the sensor S3 is turned on. Then, based on the ON signal of the sensor S3, the motor 2
5 is stopped and the support plate 27 is held in the operating position indicated by the solid line in FIGS.

Next, when the motor 40 is driven to rotate forward and the support lever 37 is rotated upward from the standby position indicated by the chain line in FIG. 1, the pressing piece 38 is located at the operating position where it comes into contact with the small bobbin U. , The sensor S5 is turned on. Then, the motor 40 is stopped based on the ON signal of the sensor S5, and the support lever 37 is held at the operation position indicated by the solid line in FIG.

The motor 31 is driven based on the ON signal of the sensor S5, and the peg 29 is rotated. The bobbin hanger 6 mounted on the creel 2 is rotatable so that excessive tension is not applied to the roving yarn during spinning. However, the bobbin hanger 11a mounted on the bobbin carrier 11
Is not rotatable so that roving does not easily occur. Therefore, it is difficult for the small bobbin U to rotate simply by applying a rotational force to the small bobbin U suspended on the bobbin hanger 11a. However, since the small bobbin U is slightly raised from the free suspended state, that is, the small bobbin U is supported by the peg 29 with a small frictional force with the bobbin hanger 11a, the small bobbin U smoothly rotates with the rotation of the peg 29. It is rotated in the same direction. The peg 29 is rotated in a direction in which the small bobbin U takes up the roving R, the roving R hanging from the small bobbin U is wound up on the small bobbin U, and the holding piece 38 removes the roving R from the small bobbin U. Pressed against U.

When the small bobbin U is rotated in a state where the pressing piece 38 is pressed against the outer peripheral surface of the small bobbin U, the roving R which is slightly hung from the small bobbin U is pressed against the small bobbin U. It is wound up. as a result,
The roving end is sufficiently entangled with the remaining roving of the small ball bobbin U.

After the peg 29 has been rotated for a predetermined time, the motor 31 is stopped by a signal from the timer. Motor 3
After 1 stops, the motor 40 is driven to rotate in the reverse direction, and the support lever 37 is rotated counterclockwise in FIGS. When the support lever 37 reaches the standby position indicated by the chain line in FIGS. 1 and 2, the sensor S6 is turned on. The motor 40 is stopped based on the ON signal of the sensor S6, and the support lever 37 is held at the standby position. Further, the motor 25 is driven in reverse rotation based on the ON signal of the sensor S6, and the support plate 27 is moved down together with the elevating shaft 23. Sensor S4
2 detects the dog 24a, the motor 25 is stopped, the support plate 27 is held at the standby position indicated by the chain line in FIG. 2, and one cycle of the roving end pressing operation is completed.

The above-described roving end pressing operation is one of roving replacement operations.
The cycle may be completed before the roving yarn changer 12 starts moving. Therefore, the speed at which the small bobbin U is rotated can be reduced, and the roving end can be reliably entangled with the remaining roving of the small bobbin U.

When the support plate 27 is located at the operating position, the small bobbin U and the bobbin hanger 11a
Is released, when the support plate 27 returns to the standby position, the small bobbin U is
There is a possibility that the device may be detached from 1a and placed on the peg 29. However, in the apparatus of this embodiment, the sensors S1 and S2 for detecting the presence or absence of the small bobbin U placed on the peg 29
Is provided, it is possible to confirm whether or not the small bobbin U is accidentally removed from the bobbin hanger 11a when the support plate 27 returns to the standby position. Accordingly, if the small bobbin U is removed, the small plate bobbin U can be suspended from the bobbin hanger 11a by driving the motor 25 to move the support plate 27 up and down.

In this embodiment, the pressing piece 38 does not abut on the outer periphery of the small bobbin U along the normal line, but abuts on the normal line. Therefore, FIG.
As shown in (1), the tip of the holding piece 38 contacts in a state of being curved along the outer periphery of the small bobbin U, the contact area with the small bobbin U increases, and the effect of holding down the roving end increases.

(Embodiment 2) Next, a second embodiment will be described with reference to FIG. In this embodiment, instead of winding the roving R from the small bobbin U to the roving guide 7 on the bobbin hanger 11a instead of winding it around the small bobbin U during the removal of the small bobbin U from the creel 2, the roving R The difference from the previous embodiment is that the winding is performed. The configuration of the roving sagging prevention device 16 is the same as that of the above-described embodiment except for the mounting positions of the sensors S1 and S2 of the small bobbin rotating device 21.

A pivoting lever 45 is disposed behind the support lever 37 in the moving direction of the roving thread changer 12 during operation, and a guide member 46 is fixed to the end thereof so as to be integrally rotatable. The guide member 46 is disposed so as to extend parallel to the rotation shaft 36 (in a direction perpendicular to the paper surface). The rotating lever 45 is arranged to be rotated between a standby position indicated by a chain line and an operation position indicated by a solid line by a driving device (not shown). The mounting positions of the sensors S1 and S2 (not shown) are changed so as not to interfere with the guide member 46.

The guide member 46 is always arranged at the standby position indicated by the chain line, and is arranged at the operation position indicated by the solid line before the support plate 27 is arranged at the operation position. Guide member 4
6 engages with the roving R hanging from the small bobbin U while being moved from the standby position to the operation position with the rotation of the rotation lever 45, and the holding piece is disposed in the operation position. It is held above the lower end of 38 so as to extend parallel to the rotation shaft 36. In this state, the small bobbin U is rotated while the holding piece 38 is pressed against the small bobbin U in the same manner as described above. Then, the roving thread R, which has been hanging down for a long time, is reliably wound around the small bobbin U, and the roving end is also pressed by the roving thread. Therefore, in the apparatus of this embodiment, a means for rotating the peg 20a of the small bobbin transfer device 14 becomes unnecessary.

The present invention is not limited to the above-described embodiments. For example, a cylinder may be used instead of using the motor 25 and the linear head 26 as the elevating means of the support plate 27, or the elevating shaft 23 may be used. May be omitted and the support plate 27 may be directly connected to the piston rod of the cylinder. The number of the pegs 29 provided on the support plate 27 may be three or more corresponding to the number of the small bobbins U suspended on the bobbin hanger 11a in one roving change operation.

The material of the pressing piece 38 may be other than urethane rubber, or the supporting lever 37 and the pressing piece 38 may be formed integrally. Further, the support lever 37 may be independently driven by a rotary actuator or a cylinder.

In the second embodiment, a pair of rotating levers 45 may be provided to support both ends of the guide member 46. Further, in the above-described embodiment, an example in which the present invention is applied to a roving yarn changer which only replaces a small bobbin and a full bobbin is described. However, the present invention may be applied to a roving yarn changing machine equipped with a roving yarn joining device.

[0039]

As described in detail above, according to the present invention, one roving exchange cycle by the roving thread changer can be performed without lengthening.
The roving end hanging from the small bobbin taken out of the creel can be reliably wound around the small bobbin. Therefore, while the small bobbin is suspended on the spare roving winding rail and waiting for transport to the roving process, the roving of the small bobbin is prevented from being unraveled and sagged even under the action of the blowing air from the traveling cleaner. This eliminates trouble caused by sagging of rovings.

[Brief description of the drawings]

FIG. 1 is a side view of a roving sagging prevention device according to a first embodiment.

FIG. 2 is a side view showing a relationship between a roving yarn changer and a creel.

FIG. 3 is a partially omitted plan view showing an arrangement of a bobbin changing device and a roving preventing device in the roving yarn changing machine.

FIG. 4 is a schematic diagram showing a relationship between a roving sagging prevention device and a conveyance rail as viewed from the spinning machine side.

FIG. 5 is a plan view of the roving prevention device.

FIG. 6 is a schematic plan view showing a contact state of a pressing piece with a bobbin.

FIG. 7 is a schematic side view of the second embodiment.

FIG. 8 is a side view of a conventional device.

[Explanation of symbols]

1 ... spinning machine, 2 ... creel, 6 ... bobbin hanger, 10 ...
Transport rail as spare roving winding rail, 11: bobbin transport body, 11a: bobbin hanger, 12: roving thread changer, 15 ...
Bobbin exchanging device, 25 ... Motor constituting lifting / lowering means, 2
6 ... a linear head, 27 ... a support plate as a support member, 29 ... a peg as a bobbin support, 30,
Reference numeral 32 denotes a pulley constituting driving means, 31 also a motor, 33 also a belt, 37 a support lever forming a roving holding member, 38 also a pressing piece, 36 ... a rotating shaft constituting driving means, 39, 41 ... same pulley, 40
... Same motor, R ... Robo, F ... Preliminary roving (full bobbin), U ... A small bobbin as a bobbin after using roving.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-51577 (JP, A) JP-A-3-90637 (JP, A) JP-A-61-119728 (JP, A) JP-A-63-119728 JP-A-6-223328 (JP, A) JP-A-2-127530 (JP, A) JP-A-63-295728 (JP, A) JP-A-5-5231 (JP, A) JP-A-62-268829 (JP, A) JP-A-2-127368 (JP, A) JP-A-60-71724 (JP, A) JP-A-2-69976 (JP, U) (Int.Cl. ⁷ , DB name) D01H 9/04 B65H 67/06

Claims (1)

(57) [Claims] Claims: 1. A spinning machine moves along the machine base longitudinal direction,
In a roving yarn changer provided with a bobbin changing device for changing a bobbin after use of a roving hung on a bobbin hanger of a creel and a spare roving wound on a spare roving winding rail, The roving yarn changing machine is disposed at the rear side in the moving direction during the roving operation, and has an operation position where it can contact the outer periphery of the bobbin after use of the roving suspended on the spare roving winding rail and a standby position where it cannot contact. A roving yarn holding member that can be moved and arranged; a driving unit that moves the roving yarn pressing member to an operation position and a standby position; A support member rotatably disposed on the support member, and a bobbin support that can be fitted into the bottom of the bobbin; a driving unit that positively rotates the bobbin support; The member is the bobbin Lifting and lowering means for moving the bobbin between a working position where the bobbin can be rotationally driven and a standby position where the bobbin cannot be engaged with the bobbin by inserting the rotatable body into the bottom of the used bobbin suspended from the preliminary roving winding rail Roof dripping prevention device for roving yarn changer.