JPH0721474Y2 - Yarn suction nozzle - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] In the spinning industry, roving or yarn wound on a bobbin is
It introduces pressurized air and draws it out with a nozzle that forms a suction airflow.By swirling the jet airflow that forms a suction airflow, the roving yarn is drawn out and swirled in the untwisting direction to immediately be used as an opening raw material. It is designed not to be cut even if the yarn is pulled out for a long time by turning in the twisting direction.

[Prior Art] Conventionally, it is known that pressurized air is ejected from an air jet nozzle and the suction back pressure accompanying the jet air is used to suck and guide a roving yarn or a yarn. It is also known to use a jet stream from these jet nozzles to open the roving yarn or swirl the jet stream to assist twisting of the yarn. However, these conventional jet nozzles have the purpose of simply swirling the jet stream to assist in opening or twisting, and actively use the back pressure associated with the jet stream to actively produce roving or yarn. Wasn't meant to suck.

[Problems to be solved by the invention] From these, we developed a suction nozzle that uses a pressurized air flow to form an efficient suction flow, and removes residual yarn remaining on the roving bobbin by suction and sucks it. There is a demand for a suction nozzle that can be used as a raw material by immediately opening a yarn or as a yarn guide tool for searching a yarn end from a yarn winding and pulling the yarn long. Decompressed air is generally used as the suction nozzle, but a large decompression generator is required to apply decompression, and it is difficult to use decompression with a device that processes a large number of roving yarns or yarns at the same time. is there. Therefore, it is necessary to use a nozzle that constitutes the pressurized air into an effective suction decompression airflow and a suction nozzle that is constructed so as to match the suctioned roving yarn or yarn to the suction purpose.

[Means for Solving the Problems] Therefore, the present invention has a hollow-shaped blowout in which a hollow portion is formed in the central portion of the pressurized air introduction tubular main body and the hollow portion is gradually narrowed to one side of the hollow portion. A hole is formed, a through hole is formed in the axial center of the hollow portion, flanges are provided on both ends of the outer circumference to form an outer peripheral groove, and at the same time, the outer peripheral groove is inclined and directed toward the outlet hole, and A core having a plurality of non-parallel ventilation paths is hermetically housed, and the other suction side of the hollow part has a suction port formed with a suction hole that gradually increases in diameter on the suction side. The pressurized air introduction is configured to correspond to the outer peripheral groove of the core.

[Operation] The pressurized air introduced into the tubular body is ejected as a swirling airflow in a fixed direction toward the outlet side by the core. On the other hand, on the suction side, a suction airflow generated along with this jet airflow is formed, and this suction airflow is used to suck the yarn. In the roving yarn, the swirling air current is swirled in the untwisting direction of the roving yarn at the same time as the suction, so that the roving yarn is immediately opened and becomes a fiber material for reuse, and in the suction of the yarn, the swirling air current is directed in the twisting direction of the yarn. The yarn can be swung to reliably catch the yarn end without cutting, and the nozzle can be moved to hold the yarn shape and guide it for a long time.

[Embodiment] The present invention will be described in detail below with reference to the drawings, but the drawings show an example of a specific embodiment of the present invention, and the present invention is not limited to the illustrated examples, and is in line with the gist of the description. It can be implemented in the same manner even if a part of the configuration is changed. Figure 1 (side view)
Shows a yarn suction nozzle 1 according to the present invention, and the nozzle 1 is provided on a suitable fixed member or movable member alone or in plural. FIG. 2 (rear view) is the left side surface of FIG. 1 and shows the yarn pull-out side, which is the outlet side of the swirling jet. FIG. 3 (front view) shows the yarn suction side on the right side surface of FIG. FIG. 4 (middle sectional view) is the section line of FIG.
FIG. 7 shows only the nozzle body in the direction of the arrow along IV-IV, and FIG. 7 (conceptual drawing) shows the assembly and parts of these parts in a partially broken shape. In these drawings, the yarn suction nozzle 1 of the present invention has a blowout port 3 formed on one side of a tubular body 2 and a suction port 10 formed on the other side. Each of the blow-out port 3 and the suction port 10 is formed to have a smaller diameter than the tubular main body 2. This diameter difference is appropriate when a plurality of diameter differences are provided, and it is convenient for connecting to a suitable shielding device, and if necessary, the diameters may be the same. A hollow portion 2a is concentrically formed inside the cylindrical main body 2, and a fumarole 3a is concentrically provided so as to communicate with the hollow portion 2a and the air outlet 3. And this fumarole 3a is the fourth
As shown in the figure, a narrowed portion is provided on the side of the cavity 2a that is about one-third of its length, and is formed by a gradually reduced diameter portion 3b and a gradually enlarged diameter portion 3c,
An inlet side of the gradually reduced diameter portion 3b has a diameter smaller than the inner diameter of the hollow portion 2a to form a step portion.

On the other hand, a core 5 is housed in this cavity 2a, and the core is
As shown in the figure, flanges 5a and 5b are
Further, step portions 5a ', 5b' are formed, an outer peripheral groove 6 is formed between both flanges, and a through hole 8 is formed in the axial center portion along the axial center. The step portions 5a 'and 5b' are step portions where the seal rings 9 and 9 are arranged, and the outer peripheral groove 6 serves as an introduced pressurized air chamber from the pressurized air introduction pipe 4 connected through the nipple 4a. The core 5 is adapted to be hermetically housed in the cavity 2a. Further, the through hole 8 has an inner diameter of the same size as the narrowed portion of the fumarole 3a, and the facing portion of the fumarole 3a forms an inclined surface 8a whose diameter is expanded at a steep angle. A plurality of ventilation holes 7 are provided at substantially equal intervals on the enlarged diameter inclined surface 8a so as not to be parallel to the axis of the core and to be inclined so as to communicate with the outer peripheral groove 6. It should be noted that this inclination is as shown by the chain line in FIG.
The inclination is almost the same as the inclination of 3b, and the non-parallel inclination with the axis is 5
It is about a degree. That is, the non-parallel inclination of the vent holes 7 serves to swirl the jet air flow. The pressure of the air ejected from these vent holes 7 becomes smaller at the narrowed portion of the fumarole 3a, so that an accompanying air flow is formed in the through hole 8 of the core. Although the outer peripheral groove 6 formed on the outer periphery of the core 5 is shown as a two-step shape in which a step portion is formed, it has two steps in order to facilitate the formation of the vent hole 7, and may be one step if necessary. Good.

On the other hand, on the opening side of the hollow portion 2a, a screw portion 2c as shown in FIG.
Is formed, and the suction port 10 is screwed into the screw portion 2c. That is, the suction port 10 has a suction hole 10a formed in its axis,
The suction hole 10a has a core having substantially the same diameter as the through hole 8 of the core 5, and has a diameter gradually increased toward the suction side. The suction port 10 also serves as an airtight fastening member for the core 5 housed in the hollow portion 2a, and a square screw portion 10c is formed on one side of the screw portion 10b. The square threaded portion 10c may be a knurled flange, or may be an engagement hole or groove formed in a tightening tool. Further, as the core 5, in order to facilitate the formation of the ventilation hole 7 and the maintenance management, as shown in FIG. 8 (expanded sketch), the outer peripheral ring 11 is formed separately, and the flange 5a on one side and A step portion 5a 'is formed and a gradually reducing diameter hole 11a is formed so as to follow the inclination of the vent hole 7, and the other side flange 5a' is provided on the other side core 5'side.
5b and step portion 5b 'are formed, and a through hole 8 is formed in this core 5'.
Is provided, and a groove 12 that is inclined and non-parallel to the axis is formed on the outer peripheral tip side of the through hole 8. The groove 12 may be configured to be fitted with the reduced diameter hole 11a of the ring 11 to form a ventilation hole. In the core having such a structure, the core 5'can be simply replaced to rotate it. The swirling direction of the air flow and the suction force can be easily adjusted, and cleaning can be easily performed.

5 and 6 (both side views) show a use example in which the yarn suction nozzle 1 of the present invention is directly opposed to a suction object,
FIG. 5 shows an example of use when, for example, when a roving bobbin suspended on a conveyor line has residual roving R, it is pulled back and removed, and this suction roving is opened and used as a direct return material. The figure shows that pressurized air is introduced to form a suction airflow on the suction port 10 side, and the swirling airflow formed on the blowout port 3 side is swirled in the direction in which the roving of the roving returns to immediately form the open fiber Ra. It is a thing. A fiber storage air separation device is appropriately connected to the outlet 3 side. FIG. 6 shows an example in which the yarn end of the tubular yarn Y wound up by a ring spinning machine is captured and used for drawing out and guiding it for a long time, and the suction nozzle 1 is provided on a moving member to apply pressure. Approaching the yarn while introducing air,
The yarn end is captured and pulled out, and the jet flow in this case is the yarn Y
The yarn Y can be pulled out by rotating in a twisting direction to prevent the yarn end from being broken and holding the yarn shape.

[Advantages of the Invention] In the yarn suction nozzle of the present invention, an effective suction airflow is formed by introducing pressurized air and ejecting air, and the yarn or the like can be easily sucked. Moreover, since the jet stream is swirled, the drawn yarn can be rotated in the untwisting or twisting direction, the roving can immediately open the fiber, and the yarn can be rotated in the twisted twisting direction of the captured yarn end to break the yarn. It is possible to prevent and reliably draw out.

[Brief description of drawings]

1 is a side view, FIG. 2 is a left rear view of FIG. 1, FIG. 3 is a right front view of FIG. 1, and FIG. 4 is a section line IV-IV of FIG.
5 is a side view showing a usage example of a suction nozzle, FIG. 7 is a development sketch drawing, and FIG. 8 is a development sketch drawing showing another embodiment. DESCRIPTION OF SYMBOLS 1 ... Thread suction nozzle 2 of this invention 2 ... Cylindrical main body 3 ... Air outlet 4 ... Pressurized air introduction pipe 5 ... Core, 6 ... Peripheral groove 7 ... Vent hole, 8 ... Through hole 9 ... Seal ring, 10 ... Suction port 11 ... Ring, 12 ... Groove

Claims (1)

[Scope of utility model registration request] 1. A suction nozzle for introducing pressurized air to draw out a yarn while rotating in a twisting direction or a twisting direction, wherein a hollow portion is formed at a substantially central portion of a pressurized air introducing tubular main body. Then, on one side of the hollow portion, a blowout hole that has been gradually narrowed and gradually expanded is formed, and in the hollow portion, a through hole is formed in the axial center, and flanges are provided on both end sides of the outer circumference to form an outer peripheral groove. A core formed with a plurality of air passages that are formed and directed obliquely from the outer peripheral groove to the outlet hole and that are not parallel to the axis is airtightly housed, and the other suction side of the hollow portion is the suction side. A yarn suction nozzle, characterized in that a suction port having a gradually increasing diameter is formed in the suction port, and the introduction of pressurized air into the cylindrical main body is made to correspond to the outer peripheral groove of the core.