JPH0232698Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a yarn cutting device for yarn breakage in a double twisting machine.

[Conventional technology]

In a double twisting machine, the spindle continues to rotate even if a yarn breakage occurs, so if the part of the yarn that comes out of the spindle that is connected to the yarn feeding pirn is not removed, it will continue to rotate around the spindle. Due to the centrifugal force of the yarn, the yarn is continuously pulled out from the yarn feeding pirn, and if the yarn winds around the spindle or the like, problems such as irritation may occur. Therefore, in order to prevent this trouble, the yarn pulled out from the yarn feeding pirn should be cut just before it is inserted into the central yarn guiding hole of the spindle. A drop wire is provided so as to swing toward the tensor provided at the top of the drop wire, and a V-shaped thread guide portion 31 is formed at the tip of the drop wire as shown in FIG. The thread 32 pulled out from the thread pirn is guided into the thread guide section 31, and the tension of the rotating thread coming out of the spindle causes friction between the members forming the thread guide section 31 and the thread 32, causing the thread 32 to The thread 32 was constructed to be severed by applying a strong twist.

[Problem that the invention attempts to solve]

Conventional yarn cutting devices are equipped with a member that guides the yarn pulled out from the yarn feeding pattern when the yarn breaks, and the force that is attracted to the central yarn guide hole of the spindle causes the yarn to be twisted more strongly due to the frictional force with the member. Depending on the material of the thread, it may not be possible to cut the thread with enough force to apply twisting, or it may be possible to cut only a portion of the fibers that make up the thread. A strange situation had also arisen. Therefore, the yarn cutting device for the double yarn twisting machine of the present invention was devised for the purpose of reliably cutting the yarn pulled out from the yarn feeding pattern just before it is sucked into the central yarn guiding hole of the spindle.

[Means to solve the problem]

In order to reliably cut the yarn pulled out from the yarn feeding pattern just before it is sucked into the center yarn guide hole of the spindle, the yarn is securely captured by the drop wire that swings toward the tensor base when the yarn breaks. A guide path and a thread cutting section formed with a blade for cutting the thread guided into the thread guide path were provided. This thread cutting part is made by bending a plate-shaped guide piece so that its planar shape forms a substantially dogleg shape, so that when the drop wire swings, the tip of the guide piece comes into contact with the tensor base of the spindle. In addition, a semi-elliptical cut is provided in this guide piece, and the tongue piece produced by this cut has a V-shaped planar shape with respect to the guide piece.
The tensor base is pushed open in the circumferential direction to form a letter shape, and the thread is guided into this V-shaped thread guide path, and the guide piece and the base of the tongue piece form a blade. When the yarn breaks, the yarn of the yarn feeding pattern is guided into the yarn guide path, and when the yarn reaches the deepest part of the yarn guide path, the force of the yarn receiving the turning force presses the yarn against the blade and adds force to the yarn. The structure was such that the thread was cut by tension.

[Effect]

When a yarn breakage occurs while the double twisting machine is in operation, the drop wire swings toward the tensor base, bringing the guide piece of the yarn cutting section into contact with the tensor base. The part of the broken yarn following the yarn feeding pirn that comes out from the spindle is swung around, which acts as a force to pull out the yarn of the yarn feeding pirn, and the yarn that is about to be pulled out from the yarn feeding pirn hits the outer circumferential surface of the tensor base. At this time, the thread is caught between the guide piece and the tongue of the thread cutting section. Then, the yarn is guided into the yarn guide path, and when it reaches the deepest part, the yarn hits a blade and is cut by the tension of the yarn, thereby preventing the yarn from being pulled out from the yarn feeding pirn.

【Example】

An embodiment of the device of the present invention will be described with reference to the drawings. The drop wire 2 is swingably provided above the spindle 1, which is the same as the known technology. A plate 3 is fixed to the drop wire 2 by welding, and a guide piece 5 is attached to the plate 3 via a connecting piece 4.
The guide piece 5 has a horizontally elongated oval shape, and semi-elliptic cuts are provided at positions slightly shifted to the right and left sides from the longitudinal center portion, and the tongue pieces 6, 6 produced by the both cuts are formed respectively. The yarn guide paths 7, 7 are formed by pushing open the yarn guide paths 7, 7 so as to open toward the side. Blades 8, 8 are formed by the guide piece 5 and the tongue pieces 6, 6 at the root portions of the tongue pieces 6, 6 pushed open from the guide piece 5. Further, the guide piece 5 is bent so that its semicircular tip portion comes into contact with the tensor base 12, so that the thread can be reliably caught in the thread guide paths 7, 7. The thread cutting section 10 formed in this manner is symmetrical in left and right directions, and the thread guide path 7,
7 is opened toward the circumferential direction of the tensor base 12 and is fixed to the connecting piece 4, so that the tensor base 12 can be used without being restricted by the direction of rotation of the spindle 1. 11 is a yarn feeding pirn, 12 is a tensor base, and 13 is a yarn guide hole of the spindle 1, which is the same as the known technology.The end of the yarn cut by the yarn cutting section 10 on the yarn feeding pirn 11 side is a guide piece. A velvet fastener 14 provided below the velvet fastener 14 is configured to catch it. Incidentally, if the root portions of the tongues 6, 6 formed on the guide piece 5 are formed to form an acute angle toward the thread guide hole 13 of the spindle 1, the possibility of thread breakage is further increased.

[Effect of the idea]

The device of this invention reliably captures the yarn that is about to be pulled out from the yarn feeding pirn with the guide piece when the yarn breaks and guides it into the yarn guide path, and when the yarn reaches the deepest part of the yarn guide path, the yarn is removed by the blade. Since it is structured so that it can be cut, regardless of the type of thread, the thread can be cut reliably when the thread breaks, and the thread can be prevented from being pulled out from the thread feeding pirn, so if the thread is wrapped around the spindle etc. This can completely eliminate any problems you may have.

[Brief explanation of the drawing]

Figure 1 is a front view of the main parts showing how it is used, Figure 2
The figure is a plan view of the same, and FIG. 3 is a plan view showing the main parts of the conventional device. 1...Spindle, 2...Drop wire,
5...Guide piece, 7...Thread guide path, 8...Blade, 9
... Thread, 10 ... Thread cutting part, 12 ... Tenser base, 13 ... Thread guiding hole.

Claims (1)

[Scope of utility model registration request] In order to allow the drop wire to swing toward the tensor base due to thread breakage, a tongue-shaped cut directed toward the circumferential direction of the tensor base is provided in a guide piece made of a thin plate on a drop wire that is swingably installed above the spindle. The piece is pushed apart from the guide piece so that its planar shape forms a V-shape to form a thread guide path, and at the deepest part of the thread guide path, a blade is formed by the root portion of the tongue piece and the guide piece. , also of the guide piece,
The opening end side of the thread guide path is bent in the direction of expanding the opening, and a thread cutting part is provided so that the bent end of the guide piece can come into contact with the tensor base when the drop wire swings. Yarn cutting device for heavy twisting machine.