JPH08239167A - Device for preventing loosening of weft feeder - Google Patents

Abstract

PURPOSE: To prevent weft from running improperly by avoiding the interference of linear elements with the weft untwisted, using a loosening preventing device of such a type as having a number of linear elements arranged in parallel in the loosening direction while being oriented in a diverging direction, above the downstream end of a weft feeder along the untwisting direction. CONSTITUTION: A linear-element retreat mechanism comprising a linear-element support member 5 and a linear-element binding member 6 is used, and the relative motions of both members cause a linear element C to be located within an untwisting area when weft is not to be untwisted, and cause the linear element C to be retreated from the untwisting area when the weft is to be untwisted. Since the linear element is thus not located within the untwisting area when the weft is to be untwisted, the weft is smoothly untwisted without interfering with the linear element. Since the linear element is located within the untwisting area when the weft is not to be untwisted, unnecessary loosening and formation of kinky yarn are avoided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing dripping of a weft yarn feeder, and more specifically to a diverging direction by directing a diverging direction on an end portion on the downstream side of the unwinding direction of the weft yarn yarn body. The present invention relates to improvement of the unwound state of a weft yarn in a hodoke apparatus of a type including a large number of linear bodies arranged in parallel.

In this specification, "unwinding direction" refers to a direction parallel to the axial direction of the yarn feeder, "hodge direction" refers to a direction parallel to the circumferential direction of the yarn feeder, and "divergence". The "direction" refers to a direction parallel to the direction from the central portion of the yarn feeder toward the outer periphery (most typically, the radial direction of the yarn feeder).

[0003]

2. Description of the Related Art Generally, in an apparatus of the type described above, interference of a linear body with respect to a weft prevents the occurrence of unnecessary hodge and warp of the weft from a yarn feeder when unwound. . Here, the time of unwinding the weft refers to the time of weft insertion (during operation and inching). However, when weft yarns are unwound from different yarn feeders such as multicolor weave, it is needless to say that the device of the present invention is set to operate on the yarn feeders whose weft yarns should be unwound. .

[0004]

However, even a linear body that effectively acts in such a manner when unwound is unwound, and as a result of interfering with the weft when unwound, extra unwound resistance acts on the weft. When the unwinding resistance is increased in this way, extra tension is applied to the weft wound around the length measuring and storage device, and the weft is apt to remain in tension even when weft-inserted, so that a weft flying defect is likely to occur.

In view of the above situation, it is an object of the present invention to prevent the occurrence of weft flying defects by avoiding the interference of the linear body with the unwinding weft in the anti-blurring device of the above type. Is.

[0006]

For this reason, in the present invention, a linear body retreating mechanism including a linear body supporting member and a linear body restraining member is used to perform relative movement of both members. The gist is to position the linear body in the unwinding region when the weft is not unwound and to retract the linear body from the unwinding region when unwinding the weft.

The withdrawal of the linear body from the unwinding region is carried out by moving the linear body in the hodge direction, the unwinding direction or the diverging direction by the relative movement of the two members.

[0008]

Since the linear body is not located in the unwinding area when the weft is unwound, the weft is unwound smoothly without interfering with the unwound area. In addition, since the linear body is located in the unwinding region when unwinding the non-weft yarn, unnecessary dazzling and chattering do not occur.

[0009]

1 shows an embodiment of the apparatus of the present invention in an exploded state. The yarn feeder 1 is wound around a bobbin core 2, and a rotary solenoid 3 is inserted in the bobbin core 2. A key 32 is provided on the output shaft 31 of the rotary solenoid 3. The cap 4 that closes the end of the bobbin core 2 is a short cylindrical member, and the center through hole 41 has an inner diameter that allows the keyed central shaft 31 of the rotary solenoid 3 to pass smoothly. Several screw holes 42 are formed outside the central through hole 41. The rotary solenoid 3 and the cap 4 are fixedly connected to a support bracket (not shown) that supports the bobbin core 2 by appropriate means (not shown).

In this example, the linear body retracting mechanism is composed of the linear body supporting member 5 and the linear body restraining member 6, and both members have a disk shape.

The central through hole 51 of the linear member supporting member 5 has an inner diameter that allows the keyed central shaft 31 of the rotary solenoid 3 to pass freely. Further, outside the center through hole 51, several first screw holes 52 similar to the screw holes 42 of the cap 4 are formed. These screw holes 52 are for assembling the linear body supporting member 5 to the cap 4 with the fastening screw 7 in cooperation with the screw hole 42 of the cap 4. However, in the case of the yarn feeder, there are few portions that undergo extreme motion such as high-speed rotation. Therefore, instead of the screw structure as described above, the linear body supporting member 5 may be assembled to the cap 4 by a magnet or the like. Further, several second screw holes 53 are formed outside these screw holes 52. These screw holes 53 are for assembling the linear body restraining member 6 to the linear body supporting member 5 with the fastening screws 8. Further, on the peripheral surface of the linear body supporting member 5, a large number of linear bodies C are oriented in the radial direction.
Is provided. Examples of these linear bodies include animal hair, Tegus (comb-shaped or loop-shaped), brushes and wires.

A key groove 62 that engages with the key 32 on the central axis of the rotary solenoid 3 is formed in the central through hole 61 of the linear member restraining member 6. Several arcuate through holes 63 are formed outside the central through hole 61. These arcuate through holes 63 have a width dimension that allows the fastening screw 8 to freely pass therethrough. Further, radial holes 64 are formed in the peripheral wall of the linear body restraining member 6 in the same number and at the same pitch as the linear bodies C on the linear body supporting member 5, and the inner diameter of the linear body C is equal to that of the linear body C. It is set larger than the outer diameter.

FIG. 2 shows the assembled state of this device. The linear body supporting member 5 is fixed to the cap 4 by a fastening screw 7, and the central through hole 51 is formed in the rotary solenoid 3
Since the output shaft 31 is larger than the output shaft 31, the rotation of the rotary solenoid 3 is not followed. On the other hand, the linear body restraining member 6 has a fixed relationship with the output shaft 31 of the rotary solenoid 3 via the key structure, and therefore follows the rotation of the rotary solenoid 3. At this time, the fastening screw 8 is in a fixed relationship with the linear body supporting member 5 and does not follow the rotation of the rotary solenoid 3, but the through hole 63 of the linear body restraining member 6 which penetrates the fastening screw 8 has an arc shape. Therefore, even if the linear body restraining member 6 rotates, the fastening screw 8 and the through hole 63 do not interfere with each other.

When the linear body restraining member 6 moves relative to the linear body supporting member 5 in the hoddle direction in this manner, the linear body C on the linear body supporting member 5 is transparent to the linear body restraining member 6. It is pushed by the hole 64 and moves (falls down) in the direction of hodge and retracts from the weft unwinding region. This state is shown in FIGS. Before the relative movement, as shown in FIG. 6, the linear body C on the linear body supporting member 5 projects in the diverging direction and is located in the unwinding region. After the relative movement, as shown in FIG. 5, the linear body C on the linear body supporting member 5 lays down in the hooked direction and is retracted from the unwinding region.

FIG. 3 shows another embodiment of the apparatus of the present invention in an exploded state. In the previous embodiment, the linear body restraining member 6 was moved relative to the linear body supporting member 5 in the hodke direction, but in the present embodiment, conversely, the linear body restraining member 6 is moved linearly. The supporting member 5 is relatively moved in the hodoke direction. Description of parts having substantially the same structure as the previous embodiment will be omitted. A key groove 54 that engages with the key 32 on the central axis of the rotary solenoid 3 is formed in the central through hole 51 of the linear body supporting member 5. Further, several arcuate through holes 55 are formed on the outer side thereof. These arc-shaped through holes 5
5 has a width dimension that allows a fastening screw 9 for assembling the linear body restraining member 6 to the cap 4 to freely pass therethrough.

A through hole 65 having an inner diameter through which the fastening screw 9 can freely pass is formed around the center of the linear body restraining member 6. The fastening screw 9 is for assembling the linear body restraining member 6 to the cap 4. However, if the head is magnetized so as to be attracted to the linear body restraining member 6, the assembly becomes more stable. Will be things.

FIG. 4 shows an assembled state. Since the linear body supporting member 5 has a fixed relationship with the rotary solenoid 3 via the key structure, it follows the latter rotation. On the other hand, the linear body restraining member 6 is attached to the cap 4 by the fastening screw 9, and does not follow the rotation of the rotary solenoid 3.
However, the through hole 5 of the linear body supporting member 5 through which the fastening screw 9 penetrates
Since 5 has an arcuate shape, the fastening screw 9 and the through hole 55 do not interfere even if the linear body supporting member 5 rotates. The state of the linear body C before and after the relative movement of the linear body supporting member 5 and the linear body restraining member 6 is substantially the same as the case shown in FIGS. 5 and 6.

Further, in all of the embodiments described above, the linear body is moved in the hodke direction to be retracted from the unwinding region, but it is also possible to move the linear body in the unwinding direction to be retracted. Is. What is shown in FIG. 7 is one example thereof, and is substantially the same configuration as the embodiment shown in FIGS. 1 and 2 except for the portions described below. That is, the solenoid 3 is not of the rotary type, but one that drives a normal output shaft in the axial direction is used. Further, the end portion of the output shaft 31 is directly fixed to the linear body restraining member 6 not through a key. Further, the fastening screw 8 and a screw hole or a through hole which cooperates therewith are not formed.

By driving the solenoid 3,
When the linear body restraining member 6 is moved relative to the linear body supporting member 5 in the unwinding direction, the linear body C pushed by the through hole 64 of the linear body restraining member 6 moves in the unwinding direction. Evacuate from the unwinding area (fall down).

In the embodiment shown in FIG. 8, the linear body is moved in the diverging direction so as to be retracted from the unwinding region. That is, each linear body through hole 6 of the linear body restraining member 6
A roller 13 is rotatably supported at the tip of a spring 12 whose base end is fixed to a fulcrum 11 provided in the vicinity of 4, and the linear body C supported by this roller 13 corresponds to the through hole 64. Has invaded inside. Further, a cam 10 is provided opposite to the roller 13, and the spring 12 presses the corresponding roller 13 against the cam surface of the cam 10. Cam 1
3 has a saw-shaped projection as shown continuously on its peripheral surface, and is configured to be rotated by a rotary solenoid 3 as shown in FIG. 1, for example. In this embodiment, the cam 10, the roller 13, the spring 12, the linear member restraining member 6 and the like constitute a retracting mechanism.

When the roller 13 is in contact with the saw-tooth valley of the cam 10, the linear member C is immersed in the through hole 64 as shown in the figure. That is, the unwinding area is in a retracted state. When the cam 10 rotates and the roller 13 comes into contact with the saw-tooth crest, the linear body C projects from the through hole 64 and enters the unwinding region.

Although the solenoid is used as the drive source in the above embodiments, an appropriate actuator may be used instead of the solenoid. In addition, depending on the yarn type, the filament may not be completely retracted from the unwinding area from the viewpoint of adjusting the unwinding tension.
The amount of evacuation may be reduced.

Further, if necessary, the amount of movement of the linear body may be changed according to the size of the winding diameter of the yarn supplying body.
For example, when the linear body supporting member 5 and the linear body restraining member 6 relatively move in the hodke direction, the rotation amount may be changed, and when the linear body supporting member 5 and the linear body restraining member 6 relatively move in the unwinding direction, the movement amount may be changed. You may change it. These change the degree of lodging of the linear body. When the linear body is moved in the diverging direction as in the embodiment of FIG. 8, the height difference between the saw-tooth peaks of the cam may be changed.

Due to the change in the movement of the linear body, the weft unwinding resistance is reduced when the winding diameter of the linear body is large, and the unwinding resistance is increased when the winding diameter is small. By setting in this way, it is possible to always apply a constant unwinding resistance to the weft. The change in the winding diameter of the linear body can be detected by time, weight, a sensor, or the like.

[0025]

Since the unwinding resistance does not become large when the weft is unwound, no extra tension is applied to the weft when it is wound around the measuring storage device, and therefore, the weft flying defect during weft insertion is also effective. Will be suppressed.

[Brief description of drawings]

FIG. 1 is a sectional side view showing an example of an apparatus of the present invention in an exploded state.

FIG. 2 is a sectional side view similarly shown in an assembled state.

FIG. 3 is a sectional side view showing another example of the apparatus of the present invention in an exploded state.

FIG. 4 is a sectional side view showing the same as the assembled state.

FIG. 5 is a front view showing a state of the device shown in FIGS. 1 and 2 when the weft is unwound.

FIG. 6 is a front view showing a state of the same when the non-weft is unwound.

FIG. 7 is a sectional side view showing still another example of the device of the present invention.

FIG. 8 is a cross-sectional view showing the main parts of still another example of the device of the present invention.

[Explanation of symbols]

 1 yarn feeder 3 solenoid 4 cap 5 linear body support member 6 linear body restraining member C linear body 10 cam

Claims (1)

[Claims] 1. A linear body retreating mechanism is configured to include a linear body supporting member and a linear body restraining member, and the linear body retreating mechanism is caused by relative movement of both members when the weft is not unwound. A dripping prevention device for a weft supply yarn body, characterized in that the linear body is positioned in the unwinding region and the linear body is retracted from the unwinding region when the weft yarn is unwound.