JP2508694Y2 - Roller winding prevention mechanism in spinning machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for preventing a fleece from being wound around a front roller in a spinning machine, particularly a ring spinning machine.

[0002]

2. Description of the Related Art In a ring spinning machine, in order to prevent the fly cotton generated from a fleece or the like being spun from accumulating on the machine stand and being taken into the yarn being spun, deteriorating the quality of the yarn. There are those equipped with a cleaning device as shown in FIG. That is, a duct 4 is provided along the longitudinal direction of the machine frame in the center of the lower frame behind the drafting devices 3 arranged on both the left and right sides of the spinning machine 1, and a rotary impeller 8 is installed therein. Is driven in the direction of the arrow by a driving means (not shown) to generate an air flow inside the duct.

At the upper left and right sides of the duct 4, an intake opening 5 that extends toward the lower rear surface of the front bottom roller R of the draft device 3 extends continuously in the longitudinal direction. The slit-shaped openings 6 (see FIG. 4) are provided in parallel, and the continuous opening 7 is also provided in the lower part,
The suction airflow F1 is introduced from the outside into the duct 4 by the airflow generated by the rotary impeller 15, and the cotton wool is sucked through the openings 5, 6, 7 to clean the machine base. There is. The sucked cotton wool is adsorbed by the filter net 9 provided in the duct 4, and the net 9
At the same time, it moves to the head portion of the machine base and is removed by cleaning means (not shown).

Among these suction openings, the opening 5 directed toward the front bottom roller R is provided at a position closest to the yarn spinning path and having a high proportion of fly cotton. At the same time, when yarn breakage occurs, it is necessary to completely suck up the fleece continuously spun from the front roller so as not to hinder others, and therefore, it occupies an important position.

[0005]

[Problems to be solved by the invention] However, this opening 5
Is formed by two plates as shown in FIG. 4, that is, a front cover 10 and an upper cover 11, and is continuous in the longitudinal direction of the machine base as described above. Therefore, since the opening area is comparatively large, when the yarn breakage that needs to suck a large amount of fleece occurs, the suction force is insufficient and the fleece may be wound around the front roller.

An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a mechanism for improving the suction force of the suction opening with respect to the front roller.

[0007]

The object of the present invention is to provide a fly dust suction duct in the frame below the draft device of the spinning machine along the longitudinal direction of the machine frame, and to provide a front cover which constitutes the front face of the duct. In a cleaning device in which an upper cover that constitutes an upper portion forms a continuous suction opening in the longitudinal direction that directs the lower surface of a front bottom roller, a protrusion protruding inward is provided in the suction opening of the front cover to provide a front bottom. This is achieved by a roller wrap preventing mechanism in a spinning machine, which is characterized in that a space between the roller and the roller is narrowed.

[0008]

[Function] Since the upper edge of the front cover is processed to form a projection and the gap between the front bottom roller and the front bottom roller is narrowed, the wind speed of the air flow sucked from here during the operation of the cleaning device increases, and the downstream side after passing through the projection Then suddenly decelerates and a vortex is generated. Since this vortex area has a negative pressure compared to the surroundings,
The fleece that adheres to the surface of the front bottom roller and tries to roll up is sucked downward and pulled into the duct. This eliminates the roller winding of the fleece.

If the projections are provided at intervals corresponding to the position of the front bottom roller of each weight, the desired effect can be achieved without substantially reducing the air volume of the air flow sucked through the suction opening. Can be mentioned. Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings.

[0010]

1 is a side sectional view of a suction opening portion showing the principle of the present invention. FIG. 1A shows a conventional case, and FIG. 1B shows a case of the present invention. The conventional opening 5 is formed by the front cover 10 and the upper cover 11 so as to be directed to the lower surface of the front bottom roller R, and the suction airflow F1 is smoothly received in the duct 4 as indicated by an arrow without receiving resistance. Is flowing into.

In the case of the present invention, sheet metal working is performed so that the vicinity of the upper edge of the front cover 10 becomes a rib-shaped projection 12 protruding toward the inside of the duct. As a result, the gap between the front cover 10 and the lower surface of the front bottom roller R is narrowed, and the flow velocity of the sucked airflow F1 increases. Immediately downstream of the protrusion 12, the flow path suddenly widens, and thus the flow is stagnated and a vortex is generated.
Due to this vortex, this region has a negative pressure compared with the surroundings, and a downward suction force is applied to the roller surface. As a result, at the time of yarn breakage, the fleece spun along the roller is peeled off from the roller surface and sucked into the duct.

In the above example, it is assumed that the projection 12 is formed into a rib shape uniformly in the length direction by sheet metal working when the front cover 10 is manufactured. However, since the draft device for spinning the fleece is installed at a predetermined interval for each weight, it is not necessary to provide the projection 12 over the entire length of the front bottom roller in order to achieve the object of the present invention. On the contrary, when the protrusions are provided over the entire length, the amount of sucked air decreases as a whole, which may adversely affect the cleaning of the fly.

Therefore, as shown in FIG.
It is desirable to press so that 2 is formed on the upper edge of the front cover 10 in accordance with the installation interval of the draft device. As a result, the protrusions 12 are formed only at the required portions, and the other portions have the same wide cotton wool suction area. Furthermore, the protrusion 12 does not have to be integrally machined from the same material as the front cover 10,
For example, it may be prepared as a separate component with an appropriate resin and attached to a predetermined position on the upper edge of the front cover 10 by means such as adhesion.

[0014]

According to the present invention, the projection is provided in the suction opening of the duct facing the front bottom roller, and the suction airflow passing therethrough is controlled to exert the suction force on the surface of the front bottom roller. Therefore, the fleece that moves along the roller surface at the time of yarn breakage can be effectively drawn into the duct, and the accident of winding around the roller can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of a suction opening of a conventional duct and a duct of the present invention for explaining the principle of the present invention.

FIG. 2 is a plan view showing the relationship between a protrusion and a front bottom roller of the present invention provided at a predetermined interval.

FIG. 3 is a sectional view showing a configuration of a cleaning device of a spinning machine to which the present invention is applied.

FIG. 4 is a perspective view showing a front cover and an upper cover that form a conventional suction opening.

[Explanation of symbols]

 1 ... Spinning machine 3 ... Draft device 4 ... Duct 5 ... Suction opening R ... Front bottom roller 10 ... Front cover 11 ... Upper cover 12 ... Projection

Claims (4)

(57) [Scope of utility model registration request] 1. A duct for sucking cotton dust is provided along a longitudinal direction of a machine base in a frame below a draft device of a spinning machine,
A cleaning device in which a front cover forming a front surface of the duct and an upper cover forming an upper part of the duct form a continuous suction opening in a longitudinal direction that points to the lower surface of the front bottom roller. A roller winding prevention mechanism in a spinning machine, characterized in that a protrusion between the front bottom roller and the front bottom roller is narrowed. 2. The roller winding prevention mechanism according to claim 1, wherein the protrusion is provided only in a region of the front bottom roller of each weight of the spinning machine. 3. The roller winding prevention mechanism according to claim 2, wherein the projection is formed integrally with the front cover by sheet metal working. 4. The roller winding prevention mechanism according to claim 2, wherein the protrusion is formed as a separate component from the front cover.