JPH0344993B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a yarn end pick-up device.

[Conventional technology]

Spinning bobbins produced by spinning machines, especially ring spinning machines, generally have bunch winding at the end of the winding tube at the center of the bobbin, and such bobbins are fed to an automatic winder for the rewinding process. In some cases, the above-mentioned bunch winding is released. For this reason, a yarn end pulling device is installed near the winder.

[Problem that the invention seeks to solve]

As such a yarn end pulling device, a yarn end pulling member that utilizes suction airflow and is generally called a suction mouth is used. That is, a suction airflow from a suction mouth is applied to the surface of the thread layer of the bobbin to suck the end of the thread on the surface of the thread layer and bring out the end of the thread.

However, if the spinning bobbins handled are a small number of varieties and a large number of bobbins, and the number of bobbins in one lot is large,
Simply positioning the bobbin to a predetermined position near the fixed suction mouth will not hinder the unwinding operation, but in a high-mix, low-volume production system, if the types of bobbins to be transported are random, the thread layer may be Due to the difference in diameter, the distance between the opening of the suction mouth and the thread layer surface of the bobbin is not constant.
There will be a difference in the suction force that is applied, which may cause mistakes when speaking.

The present invention aims to solve the above problem.

[Means for solving problems]

The present invention arranges a suction mouse that can approach and move away from the yarn end surface of a spinning bobbin at a predetermined position, and uses the suction mouse to monitor the distance between the suction mouse opening and the yarn layer surface. A monitoring device consisting of a full bobbin detection sensor and a half-bobbin detection sensor with the optical axes of each sensor shifted is provided, and the approach position is controlled by the monitoring device while the suction mouse is moving toward the surface of the yarn layer. This is what I did.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

As a feed device, the bobbin is inserted into an independently separated conveyance medium (hereinafter referred to as a tray),
Although a device for releasing and cutting bunch winding and picking out yarn ends from a yarn layer is shown, it can of course be applied to other conveying and picking systems.

FIG. 9 shows an example of a pick-up device.

In this embodiment, a winding device is shown in which bunch winding is applied to the lower part of a bobbin, but the present invention can also be applied to a case where a bobbin having a top bunch is handled.

In FIG. 9, a schematic configuration of the pick-out device is shown. The spun bobbin 1 is inserted into the tray T and transported along the conveyance path 2 in the direction of arrow 3, and reaches the receiving position A of the pick-out device. The bobbins 1a received in the tray receiving parts 5 formed at regular pitch intervals on the rotary plate 4 of the pick-out device are moved to each processing station B, as the rotary plate 4 intermittently rotates in the direction of arrow 6.
After passing through C, D, and E, we arrive at payout station F.
The bobbin 1f that has been successfully taken out is conveyed along the conveyance path 7 in the direction of the arrow 8 toward the winder.

The station B is provided with a cutter device 10 for releasing and cutting the bunch winding 9 wound around the lower end of the bobbin, and the station C is provided with a cutter device 10 for releasing and cutting the bunch winding 9 wound around the lower end of the bobbin.
A rotating roller 11 is disposed to pull out the thread connected between the thread c and the cutter 10 and lightly wrap it around the surface of the thread layer. At station B, the bobbin 1b is rotated by a friction roller in a direction 12 for unwinding the wound yarn, and at station C, the bobbin 1b is rotated by a roller 11 in a direction 13 for winding. Furthermore, at station D, the free yarn end is suctioned and
A yarn end pulling device 14 for release is arranged, and is constituted by, for example, a suction mouth 16 having a slit-like yarn end suction opening 15. In this position, the bobbin 1d is rotated by the friction roller 17 in the thread release direction 12. Furthermore, the station E is provided with a thread end insertion mechanism 19 that cuts the thread pulled out from the bobbin to a certain length and inserts the thread end into the center hole 18 of the bobbin 1e.

Note that the bobbin tray T in this embodiment is the first one.
1 As shown in the figure, a base part 21 and a peg 22 for bobbin insertion are integrally formed on a disc-shaped base 20, and a hollow part 23 opening at the bottom is formed inside, and the peg 22 has air passage. A hole 24 is bored, and by applying a suction air flow in the direction of arrow 25 inside the tray T, a suction force 26 is applied to the bobbin center hole 18 through the air passage hole 24. .

Tray with bobbin inserted that has reached receiving position A
Ta is an intermittent rotation of the rotating plate 4 every 45 degrees in the direction of the arrow 6, and when it reaches the unloading position F after passing through the processing stations B to E along the path L1, the successfully unloaded bobbin is discharged to the conveyance path 7. However, the bobbin that failed to be opened was blocked by a movable guide (not shown),
Subsequently, the feed processing receiving position A is reached again via the feedback path L2, and the same operation as described above is repeated. That is, the processing station E is provided with a sensor for detecting the end of the pick-up yarn, and when the sensor detects that there is no yarn, a movable guide (not shown) of the station F is positioned by a rotary solenoid or the like and reaches position F. This prevents tray Tf from being dispensed.

Referring to FIG. 10, a device for accommodating the pick-up yarn end at a predetermined position on the bobbin will be described. In this embodiment, a type is shown in which the released yarn end is transferred while being inserted into the center hole 18 of the bobbin from above.

That is, the yarn end insertion device is provided across the processing stations D and E. The device includes a suction mouth 16 provided at station D, a cutter 34 provided at station E, which detects the presence or absence of a drawn-out thread and cuts the thread at a certain length position.
It is comprised of a thread end suction mechanism 35 and the like that sucks the cut thread end into the center hole 18 of the bobbin.

The suction mouse 16 is located at the station D.
A substantially L-shaped suction device having a slit-like opening 15 extending to the length of the yarn layer of the bobbin 1d at the station E position, and a slit 36 connected to the opening 15 and extending above the yarn detection/cutting device 34 at the station E position. It is composed of a pipe, and the above-mentioned opening can be moved in the direction toward and away from the yarn layer surface by a mechanism described later, so that even if the yarn layer diameter of the bobbin to be processed differs, the yarn layer surface can be moved. The distance between the opening 15 and the opening 15 is automatically adjusted, so that a constant suction force can always be applied to the surface of the yarn layer. The pipe 16 is connected to a suction blower (not shown).

Next, an embodiment of the position control mechanism of the suction mouse 16 is shown in FIGS. 1 and 2. Note that if FIG. 1 is a front view, FIG. 2 is a right side view of FIG. 1. The position control mechanism of the suction mouse 16 includes a moving device 40 that moves the suction mouse 16 in a direction toward and away from the surface of the yarn layer of the bobbin 1d, and a monitoring device 41 that monitors the amount of movement of the suction mouse 16. It consists of

The moving device 40 includes guide rails 42 and 43 fixed at the top and bottom for regulating the moving direction of the suction mouse 16, a slide block 44 slidably supported by the upper guide rail 42, and a slide block 44 that is slidably supported by the upper guide rail 42. a bracket 45 that connects the suction mouth 16, a drive ball screw 46 provided parallel to the guide rail 42, a connecting member 48 that connects the nut body 47 that engages with the ball screw 46 and the bracket 45, and It is composed of a rotary drive motor 49 and the like.

A guide rail 42 and a bearing 51 for a ball screw are fixed to the ceiling frame 50, and a bracket 45 is connected and fixed between a slide block 44 slidably supported by the guide rule 42 and the side wall of the suction mouth 16.

A bearing 51 for a ball screw is fixedly supported by a support rod 52, and as shown in the third figure, a connecting member 48 is connected between a nut body 47 that meshes with the ball screw 46 and the suction mouth, and as the nut body 47 moves. The suction mouse 16 touches and separates from the bobbin 1d. A motor 49 is supported by a plate 53 fixed to a bearing 51, and a drive pulley 54 of the motor 49 is supported by a plate 53 fixed to a bearing 51.
A belt 56 is placed between the pulley 55 fixed to the ball screw 46, and the ball screw 46 rotates in forward and reverse directions. In addition, 57 and 58 in FIG. 1 are proximity switches that detect the movement of the nut body 47, the proximity switch 57 detects the retracted standby position of the suction mouse 16, and the other proximity switch 58 detects the movement of the nut body 47. This switch is used to prevent running and to prevent damage to suction mice.

It is preferable that the end 59 of the upper horizontal portion of the suction mouth 16 be connected to a fixed pipe 60 leading to the blower in a sliding manner or by a commonly used bellows-type flexible pipe.

In FIGS. 1 and 2, suction mouse 16
A guide roller 61 is supported at the lower end and positioned within the lower rail 43. Therefore, the suction mouth 16 moves while being regulated by the upper and lower rails 42, 43, so that it is parallel to the axis of the bobbin. It can be ensured that the object can be moved while maintaining the .

Device 41 for monitoring the amount of suction mouse approaching
is fixedly installed on a bracket 62 fixed at the bottom of the suction mouse 16. In this embodiment, as shown in FIG. 3, the device 41 is mounted on a bracket 62 at an angle so that optical differential distance discrimination sensors 63 and 64 hit a position slightly offset from the center of the bobbin. , and is provided so that the distance S1 between the suction mouth opening and the thread layer surface is substantially constant regardless of the size of the bobbin diameter. The distance discrimination sensors 63 and 64 are provided at two locations, upper and lower, in the axial direction of the bobbin, as shown in FIG. That is, as shown in FIG. 4, the upper sensor 63 is a sensor that detects the thread layer surface 65 of the full bobbin FB, and the lower sensor 64 is a sensor that detects the thread layer surface 66 of the half-wound bobbin PB. The bobbin PB with residual yarn, which is usually called a half-bobbin, is manufactured from the winding process on the spinning machine.
The remaining thread portion is the lower part of the bobbin, and therefore the sensor 63 detects the maximum diameter portion 65 of the fully wound bobbin FB.
In this case, since the maximum diameter portion 66 of the half-ball bobbin PB cannot be detected, a sensor 64 for the half-ball bobbin is provided. Therefore, if the detection distances of the sensors 63 and 64 are set to be the same, if either sensor detects the set distance, the suction mouse will have the same distance from the yarn layer surface regardless of whether it is a full bobbin or a half bobbin. It is always constant.

Next, the mounting angles of the sensors 63 and 64 will be explained with reference to FIGS. 5 to 7. Note that the sensor 63,
Of the 64 sensors, sensor 63 will be described, but sensor 6
The same applies to 4. FIG. 5 shows a case where the optical axis 67 of the sensor 63 is set with reference to the large diameter bobbin LB. That is, when the suction mouse 16 is moved in parallel to the position where the sensor 63 detects the set distance l1 toward the surface of the yarn layer of the large-diameter bobbin LB having a diameter D, the drive motor 49 is turned off, and the opening end surface of the mouse and the yarn layer are The distance between the surfaces is the set amount S1,
At this time, if the mounting angle of the sensor is set so that the optical axis 67 of the sensor 63 faces the bobbin center 0, the suction mouse 16 will not move until the sensor 63 detects the set distance l1 for the small diameter bobbin SB of diameter d.
63a to be moved integrally with the two-dot chain line 16a
As shown in FIG. 5, the distance between the opening end surface of the suction mouth and the thread layer surface of the small diameter bobbin is zero in the case of FIG. 5, and the distance S1 cannot be obtained.

On the other hand, in the opposite case, as shown in FIG. 6, when the sensor 63 approaches the thread layer of the small diameter bobbin SB by a set distance l1, there is a set distance between the opening end surface of the suction mouth and the thread layer surface. When the optical axis 68 of the sensor is set to point toward the bobbin center 0 so that S1 occurs, the sensor 63
When detects the set distance l1, the distance between the opening end surface of the suction mouth and the surface layer of the yarn layer becomes S2, which is considerably larger than the set distance S1.

Therefore, in this embodiment, the sensor 63 has an optical axis 69 when detecting the large diameter bobbin LB and an optical axis 70 when detecting the small diameter bobbin SB, as shown in FIG.
is located at a position slightly shifted from the bobbin center 0 to the opposite side. By attaching the sensor 63 in this manner, the distances S1 and S10 between the suction mouse and the thread layer surface can be made substantially constant. That is, S1≈S10 in FIG. 7.

By setting the mounting position of the sensor 63 as described above, if the diameter φ of the bobbin to be processed is d<φ<D, the opening end surface of the suction mouth is set to the yarn layer surface by the sensor 63. You can approach up to a certain distance.

Furthermore, in order to bring the difference between the distances S1 and S10 in FIG. An ultra-small sensor having the same function as the illustrated sensor 63 is attached to the opening end surface 71.

Although an optical sensor is used as the distance discrimination sensor in the above embodiment, it is also possible to apply an ultrasonic distance discrimination sensor that uses ultrasonic waves.

Therefore, when the bobbin is positioned at the station D shown in FIG. 9, the suction mouse is first moved to determine the opening position prior to the opening process. Next, the above-mentioned ejecting action is started.
That is, in the above-mentioned pick-up device, as shown in the time chart of FIG. 8, one step of pick-up processing is completed at one station, and the bobbin is moved to the next processing station 72 to complete one cycle CL.

Therefore, when one cycle of pick-up processing is started for the bobbin that has arrived at the station D,
At the beginning, the suction mouse moves in a short period of time73
The movement to the above-mentioned predetermined position 74 is completed, and then operations such as rotation of the bobbin and suction of thread by the suction mouth are started, and while the bobbin is stopped, the above-mentioned pick-up processing operation is performed at 75, and one cycle is completed. Nearby, after the suction mouse leaves the bobbin 76, the bobbin moves 72 to the next station E.

Therefore, it is necessary to position the suction mouse in an extremely short time. For example, if one cycle T in FIG. 8 is 3 seconds, the movement time t of the suction mouse is within 0.3 seconds.

As described above, the distance between the open end surface of the suction mouth and the thread layer surface of the bobbin is constantly monitored and controlled by the sensor 63 even if the bobbin diameter is different, so that the suction force of the suction mouth is It acts efficiently on the layer surface and can reliably suction the yarn ends. Even in a system where bobbins of various types are conveyed at random, the thread ends can be very effectively suctioned by the above-mentioned pick-up device.

The distance S1 is suitably 2 to 3 mm, and can be arbitrarily set depending on the yarn type, ie, yarn thickness, natural fiber and synthetic fiber, etc., and is set by adjusting the sensitivity of the distance discrimination sensor.

〔Effect of the invention〕

As described above, in the present invention, the thread end suction opening of the suction mouth can approach and move away from the thread layer surface, and when approaching, the amount of approach can be kept constant by the monitoring device. Even if the position of the yarn layer surface is random due to differences in the bobbin diameter or deviations in bobbin positioning even if the bobbin has the same diameter, the suction mouse always moves toward the yarn layer surface and calculates the approach distance. In addition to adjustment, the optical axes of the full bobbin detection sensor and half-bobbin detection sensor are shifted, so the sensitivity for determining the distance between the bobbin and the suction mouse can be adjusted, and that distance can be used to adjust the amount of thread taken up on the bobbin. Since it can be adjusted accordingly, a stable yarn end suction force can be exerted, which is particularly effective in a high-mix, low-volume production system.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a front view showing an embodiment of the present invention;
The figure is a side view, FIG. 3 is a sectional plan view, FIG. 4 is an explanatory diagram showing the positional relationship between the sensor and the bobbin, and FIG.
Figures 7 to 7 are explanatory diagrams showing the relationship between the distance between the suction mouth opening end surface and the yarn layer surface depending on how the sensor is installed, and Figure 8 is a time chart showing the timing of bobbin transfer and suction mouth movement. figure,
FIG. 9 is a perspective view showing an example of a pick-up device;
The figure is a perspective view of stations D and E of the same device,
FIG. 1 is a sectional view showing a bobbin conveyance tray. 1, 1d... Bobbin, 16... Suction mouse, 40... Moving device, 41... Monitoring device, 6
5, 66... Thread layer surface, 71... Open end surface, S1
...Distance between the thread layer surface and the open end surface of the suction mouth.

Claims (1)

[Claims] 1. A suction mouth for suctioning the yarn end is arranged so as to be able to approach and leave the yarn end surface of the bobbin, and a full bobbin detection sensor is installed to monitor the distance between the opening end surface of the suction mouth and the yarn layer surface. A thread end feeder is characterized in that a monitoring device comprising a half-bobbin detection sensor and a half-ball bobbin detection sensor is attached to a suction mouse, and the optical axis of each sensor is shifted.