JPS6234671B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a yarn splicing method and apparatus for joining the ends of two yarns together.

A splicing operation for joining the yarn ends of two yarns is often performed in the fiber production process. In addition to tying the yarn ends together, pasting them together using chemical adhesives or fusion, there are also methods for splicing yarns, such as tying the yarn ends together, pasting them together using chemical adhesives or fusion, and splicing single yarns by spraying compressed air into the area where the yarn ends are aligned. Methods such as intertwining are known. Among these methods, the method using compressed air does not have disadvantages such as knot knots not being formed as in the tying method, or hardening of the threads as in methods using chemical adhesives or fusing, and it can also be done in an extremely short time. It has the advantage of being efficient.

As a yarn splicing method using such compressed air,
Japanese Unexamined Patent Publications No. 19843-1984, No. 77741-7741, and No. 96137-1988 are known, but in all of them, two thread ends are brought together in opposite directions and aligned. As a result, the spliced portion inevitably becomes longer, which has the disadvantage of becoming more noticeable when made into high-quality products such as knitted fabrics. In addition, this spliced portion may become caught in the heddle holes of the loom or the needle holes of the tufting machine, causing trouble. In an attempt to solve this problem, a method has been used in which the ends of two yarns are aligned in the same direction, the aligned portion is subjected to air pressure treatment, and then the free end side of the yarn is cut off. However, since the yarn cutting point is quite far from the pneumatic treatment chamber, the length of the free end (selvage) after cutting is still long. However, the problem in the post-processing process has not yet been completely resolved.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a yarn splicing method in which the yarn splicing portion is small and there is no tangle of excess yarn or mixing of yarn balls. Still another object of the present invention is to provide a yarn splicing device that can efficiently carry out the yarn splicing method described above and that can be easily replaced with a conventionally known mechanical automatic knotter. It is in.

The yarn splicing method of the present invention that achieves the above object includes aligning the yarn ends of two yarns in the same direction,
The drawn portion is inserted so as to penetrate into the yarn processing chamber to substantially free its free end side, and the opposite side with the yarn processing chamber sandwiched therebetween is gripped and fixed, and then compressed air is blown into the yarn processing chamber. By doing so, the drawn portion is given entanglement while being vibrated so that it becomes a belly within the yarn processing chamber and has nodes on both sides outside the yarn processing chamber, and then the free end side of the drawn portion is transferred to the yarn processing chamber. and the node of vibration, and at the same time, the grip and fixation are released.

Further, the yarn splicing device of the present invention that achieves the above object includes a yarn processing chamber having openings for entering and exiting the yarn at the front and rear and having a compressed air injection hole on the outer periphery, and an opening for entering and exiting the yarn on one side of the yarn processing chamber. a sliding member having a movable blade in sliding contact with a fixed blade provided in the yarn processing chamber; a yarn clamping means provided facing the other yarn entry/exit opening of the yarn processing chamber; and the sliding member and the clamping means. and a drive mechanism that interlocks the.

The above-mentioned yarn processing using compressed air involves rotating the compressed air to twist the yarn by twisting it, or colliding the compressed air almost at right angles to the gathered portion of the yarn, causing the single yarns to become entangled with each other by vibration. However, the twisting method has the disadvantage that the binding force is weaker than that of interlacing, so the yarn splicing method of the present invention applies entanglement.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Details will be explained below with reference to embodiments of the present invention shown in the drawings.

FIG. 1 is a front view of a yarn splicing device implementing the present invention;
2 is a plan view of the same, and FIG. 3 is a side view taken in the direction of the - arrow in FIG. 1. Also, Figure 4 is - of Figure 2.
FIG. 5 is a rear view showing the relationship between the fixed plate and the sliding plate as seen from the arrow, and a schematic diagram showing the state in which two yarn ends are entangled in the yarn treatment chamber.

In the figure, a fixed plate 1 and a block 3 are arranged parallel to each other at a predetermined interval, their both ends are fixed by side plates 6 and 7, and the lower ends of the side plates 6 and 7 are connected by a bottom plate 8. Fixed. Fixed plate 1
A sliding plate 2 is inserted between the block 3 and the block 3, and the sliding plate 2 is supported by fitting a protrusion 47 into a horizontal guide groove 46 bored in the block 3. It is designed to be able to slide horizontally. Further, a steel ball 15 rotatably supported by a bearing 16 is in contact with the back side of the sliding plate 2. 15 toward the sliding plate 2 side. Due to such elastic force, the sliding plate 2 is always pressed against the fixed plate 1 so as to be in close contact with the fixed plate 1. The fixed plate 1 has a yarn processing chamber 34 having a slit 33 for introducing the yarn.
Similarly, a notch 50 is provided in the sliding plate 2 and a V-shaped notch 40 is provided in the block 3 so as to correspond to the yarn processing chamber 34.

Thread clamps 4 and 5 are provided on the front surface of the fixed plate 1. The thread clamps 4 and 5 are supported so as to be swingable around pins 19 and 20 implanted in the fixed plate 1, and are also supported between pins 21 and 22 implanted in the thread clamps 4 and 5. A spring 23 is tensioned to provide an elastic force that draws the protrusions 26 and 27 of the thread clamps 4 and 5 toward each other while keeping them in contact with each other. Below the sliding plate 2 is a drive shaft 1.
0 is rotatably supported by side plates 6 and 7. This drive shaft 10 includes a drive plate 13 and a cam 1.
1. The cylindrical cam 9 and the disc cam 12 are each fixed and rotate integrally with the drive shaft 10. A drive pin 14 is implanted in the drive plate 13, and the drive plate 13 and the drive shaft 10 are driven by engagement of the drive pin 14 with a drive source (not shown). A recess 11a is provided in a part of the outer circumference of the cam 11, and a guide cylinder 28 fixed to the bottom plate 8 is attached to the recess 11a.
A steel ball 30 supported via a spring 29 is elastically engaged with the steel ball 30 . That is, the steel ball 30 acts as a stopper, and is released from the engagement by the rotation of the drive shaft 10, and a series of yarn splicing operations are performed during one rotation of the drive shaft 10, and then engaged again in the recess 11a. to position the drive shaft 10. Cylindrical cam 9
A cam groove 9a is bored in the slide plate 2, and this cam groove 9a engages with a roller 32 attached to a pin 31 implanted in the sliding plate 2. Therefore, the rotation of the cylindrical cam 9 causes the sliding plate 2 to slide left and right along the profile of the cam groove 9a. The disc cam 12 is provided with a projection 12a which is adapted to engage with a roller 24 provided on the thread clamp 5. That is, the disc cam 12 is connected to the drive shaft 1.
0, when the protrusion 12a engages with the roller 24, the thread clamp 5 rotates clockwise in FIG.
, the tips of the two thread clamps 5 and 6 are expanded. Also, the disc cam 12
When the protrusion 12a comes off the roller 24 due to the rotation, the thread clamp 5 rotates counterclockwise in FIG. 1, closing the tips of the two thread clamps 5 and 6.

The outer periphery of the outlet of the yarn processing chamber 34 on the side that comes into contact with the sliding plate 2 is processed into a sharp edge shape.
This forms a fixed blade. A member 48 having a semicircular cross section is adhered to the bottom side of the yarn processing chamber 34 so that the upper surface forms a flat plane. Two compressed air injection holes 35 are opened in each inner wall surface of the yarn processing chamber 34, which is symmetrical with respect to the vertical bisector plane of the plane formed by this member 48. The extensions of the axes of these compressed air injection holes 35 intersect within the yarn processing chamber 34. The end of the member 48 having a half-moon shape in cross section faces the sliding plate 2 so that the sharp edge at the opening of the yarn processing chamber 34 can function as a fixed blade.
It is located slightly inward. On the other hand, the notch 50 of the sliding plate 2 is also processed into a sharp edge at its peripheral corner on the side facing the fixed plate 1, so that when the sliding plate 2 slides, it corresponds to the fixed blade on the yarn processing chamber 34 side. It is designed to have the function of a moving blade.

A compressed air injection hole 35 opening into the yarn processing chamber 34 passes through a passage 36 and merges into a passage 37 . The passage 37 opens in the fixed plate 1 toward the sliding plate 2, and communicates with a communication groove 39 of a certain length bored in the surface of the sliding plate 2. On the other hand, a passage 38 is bored in the fixed plate 1 and communicates with a compressed air source (not shown) via a hose 25.
It is open on the sliding plate 2 side. This passage 38 is closed by the wall surface of the sliding plate 2 in the position shown in FIG. 2, but when the sliding plate 2 moves to the right, the sliding plate 2
The compressed air communicates with the communication groove 39 of the communication groove 39,
The air is injected into the yarn processing chamber 34 from the compressed air injection hole 35 via the passage 37 and the passage 36. Therefore, the sliding plate 2 also serves as a valve mechanism for supplying and shutting off compressed air to the compressed air injection holes 35 at the same time.

Hereinafter, the operation of splicing the yarn ends of two yarns using the above-mentioned device will be explained.

First, the ends of the two yarns 41 and 42 to be spliced are aligned in the same direction, and the aligned portions are inserted into the yarn processing chamber 34 through the slit 33. At this time, the free end side of the drawn part of the threads 41 and 42 is located on the block 3 side, and the continuous thread side is located on the thread clamp 4 and 5.
Position it on the side.

Next, from the state shown in Figs. 1 to 4, move the drive shaft 10 to the third
When turning in the direction of the arrow in the figure, the roller 24 of the thread clamp 5 is first released from the protrusion 12a of the disc cam 12, and the tips of the thread clamps 4 and 5 are closed, and the thread 41,
42. Grip the pulling part. Next, the sliding plate 2
It moves to the right in the drawing (to the left in FIG. 4), and the communication groove 39 of the sliding plate 2 communicates with the passage 38 communicating with the compressed air source. Due to the communication between the passage 38 and the communication groove 39, compressed air is injected from the compressed air injection hole 35 into the yarn processing chamber 34. The compressed air injected from the two compressed air injection holes 35 collides on the way, merges, becomes a jet flow with a vertical vector, and acts almost perpendicularly on the aligned portion of the yarn. As shown in FIG. 5, the pulled together portions of the yarns 41 and 42 that are subjected to the action of a substantially vertical jet have knots 44 and 45 on both sides of the yarn processing chamber 34, and a belly 43 inside the yarn treatment chamber 34. The vibrations are made such that the nodes 44 and 45 are strongly intertwined. In the above-mentioned entangling action, the member 48 having a planar upper surface plays an effective role, vibrating the yarn along the plane of the member 48, and thereby causing the knots 44, 45 to move more easily than in the case where a swirling motion is imparted. can be made to provide even stronger confounding.

When the drive shaft 10 further rotates, the sliding plate 2 begins to slide to the left in FIG. 2 (to the right in FIG. 4), so that the communication groove 39 is removed from the passage 38.
Since the passage 38 is closed, the injection of compressed air from the compressed air injection hole 35 is stopped. Naomo sliding plate 2
Since the blades slide as they are, a fixed blade formed by a sharp edge at the outlet of the yarn processing chamber 34 and a movable blade formed by a sharp edge formed in the notch 50 of the sliding plate 2 align the yarns 41 and 42 in the fifth direction. A in the diagram
It will be cut at the location. That is, since the yarn pulling section cuts between the outer side of the yarn processing chamber 34 and the knot section 45, the knot section 45 is not mixed in the remaining continuous threads 41 and 42, and the knot section 44 Only that will remain.

The drive shaft 10 further rotates, and after exactly one rotation it returns to the state shown in FIGS. Open, thread 4
1 and 42 are released. Also, at the same time, cam 1
The steel ball 30 again engages with the recess 11a of the drive shaft 10, thereby stopping the drive shaft 10 at a predetermined position. The yarn end on the side with the knot 45 is treated as a waist.

The spliced portion obtained as described above has knot portions 44 that are strongly intertwined, and a spread portion (selvedge) approximately corresponding to the length of the yarn processing chamber 34 (thus, the thickness of the fixing plate 1). ). The strength of the knot portion 44 is 80% of the strength of the continuous portion of the yarns 41 and 42.
It has become a degree. On the other hand, it is possible to make the length of the opening part as short as possible (for example, 10 mm).
(below), the length of the ear portion of the yarn spliced portion obtained is sufficiently short. Furthermore, since the knot portion 45 is not included, there is no unnecessary tangle of single yarn in the ear portion. Therefore, the yarn splicing section is very compact, making it difficult to cause trouble when used in subsequent processes.

Regarding the device, although the yarn processing chamber 34 in the embodiment has a non-circular cross section, a hole with a circular cross section is first drilled and a member with a half-moon cross section is attached afterwards, so that the shape of the yarn processing chamber 34 is non-circular. This makes fixed blade machining easier.

Similarly, in the embodiment, the notch 50 on the sliding plate 2 side
Since the shape is a continuous arc, the movable blade of the sharp edge formed here works in combination with the fixed blade of the yarn processing chamber 34 to ensure that the cutter cuts the opened single yarn without letting it escape. This will prevent miscuts.

According to the above-mentioned device, the functions necessary for a pneumatic automatic thread knotter can be compactly integrated to the same level as a conventional mechanical automatic knotter. In fact, the yarn connecting device of the above embodiment has one of the one-touch couplers on the hose 25 and the other side of the coupler leading to the compressed air source on the winding machine stand side, making it easy to use with the conventional mechanical automatic knotter. It is possible to make them compatible.

In the above embodiments, the sharp edges may not be directly processed on the fixing plate 1, but may instead be formed by attaching a thin plate having a sharp edge locally or over the entire surface. Further, the drive shaft 10 may not be rotated continuously, but may be rotated intermittently to adjust the compressed air injection time. Furthermore, the drive shaft 10 is 1
The rotation is not limited to one cycle, but may be one half rotation or one cycle.

Furthermore, although the member 48 was adhesively bonded in the above embodiment, as shown in FIG.
1 may be provided and fixed with screws, or a flat plate 49 having a trapezoidal cross section may be bonded as shown in FIG.

As described above, the yarn splicing method of the present invention involves aligning the yarn ends of two yarns in the same direction, inserting the aligned portions into the yarn processing chamber so as to pass through the yarn processing chamber, and inserting the yarn ends on the free end side. is made free or semi-fixed, that is, substantially free, and the opposite side of the yarn processing chamber is gripped and fixed, and then vibration is applied such that it becomes an antrum in the yarn processing chamber and has nodes on both sides outside the yarn processing chamber. After that, the free end side of the pulling part is cut between the yarn processing chamber and the vibration node, and the gripping and fixing is released, so that the yarn splicing part can be made compact. Moreover, it can be made without any tangles of excess threads or the inclusion of balls of threads.

Further, the yarn splicing method of the present invention includes a yarn processing chamber having openings for entering and exiting the yarn at the front and rear, and a compressed air injection port on the outer periphery, and a fixed blade provided at the opening for entering and exiting the yarn on one side of the yarn processing chamber. a sliding member having a movable blade that slides into contact with the yarn processing chamber, a yarn clamping means provided facing the other yarn entry/exit opening of the yarn processing chamber, and a drive mechanism that interlocks the sliding member and the clamping means. By adopting a structure consisting of the following, it is possible to carry out a compact yarn splicing operation at the yarn splicing section as described above, and to facilitate replacement with a conventionally known mechanical automatic knotter.

[Brief explanation of the drawing]

FIG. 1 is a front view of a yarn splicing device implementing the present invention;
2 is a plan view of the same, and FIG. 3 is a side view taken in the direction of the - arrow in FIG. 1. Also, Figure 4 is - of Figure 2.
FIG. 5 is a rear view showing the relationship between the fixed plate and the sliding plate as seen from the arrow, and a schematic diagram showing the state in which two yarn ends are entangled in the yarn treatment chamber. FIG. 6 is a perspective view showing another example of the member installed in the yarn processing chamber, and FIG. 7 is a front view showing still another example. 1... Fixed plate, 2... Sliding plate, 3... Block, 4, 5... Thread clamp, 15... Steel ball, 16
... Bearing, 18 ... Screw, 33 ... Slit, 3
4... Yarn processing chamber, 35... Compressed air injection hole, 40...
Notch, 41, 42... Thread, 43... Belly, 44,
45...section, 50...notch.

Claims (1)

[Claims] 1. Pull the yarn ends of the two yarns in the same direction and insert them into the yarn processing chamber so as to penetrate through the yarn processing chamber to substantially free the free end side and open the yarn processing chamber. By gripping and fixing the opposite side, and then blowing out compressed air into the yarn processing chamber,
The pulling part is given entanglement while being vibrated so that it becomes an antinode in the yarn processing chamber and has nodes on both sides of the outside of the yarn processing chamber, and then the free end side of the pulling part is connected to the yarn processing chamber. A yarn splicing method characterized in that the yarn is cut between the knots and the grip and fixation is released.