JPS6216876Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a shredded tobacco feeding device in a cigarette manufacturing device.

``Prior art'' To supply shredded tobacco to a chimney in a cigarette manufacturing device, the shredded tobacco conveyed by a needle planting drum 5'' is plucked from the needle planting drum 5'' by a picker roller 5' and arranged in parallel. The chimney 3 (a rectangular piece conveyed in a long rectangular shape in the direction of travel of the perforated conveyor belt 1, which will be described later) is transported to the Winnowa 5, and is accelerated by the Winnowa 5 and ejected in a fixed direction from the jet air diff user 4. It rises due to the air flow flowing through the air duct) and is attracted to the perforated conveyor belt 1 provided at the upper end of the chimney 3. The perforated conveyor belt 1 is disposed within a trough-shaped guide, and the adsorbed shredded tobacco is shaped into a tobacco insert according to the shape of the trough, and is rolled together with wrapping paper by known means to form a cigarette. . On the other hand, the shredded tobacco that is accelerated and dispensed by the Winnowa 5 often contains some large or heavy shredded tobacco particles. Large or heavy particles of the shredded tobacco cause a difference in the ejection condition from ordinary shredded tobacco, and penetrate the airflow ejected in a fixed direction from the jet air diff user 4. The shredded tobacco that has passed through flows into a device for further repeated separation. In this separation, even if the tobacco is heavy, the particles are small enough to be used, and the shredded tobacco is returned to the chimney 3 through the rear channel 10. The airflow flowing through this channel 10 is generated in response to the velocity of air ejected from the jet air differential user 4 in a fixed direction.

``Problems to be Solved by the Invention'' However, in these conventional devices, the velocity of air jetting toward the chimney 3 is relatively low on both sides of the jet air differential users 4, and therefore the rear channel to be reduced is relatively low. The air flow velocity is also low on both sides of 10. Due to this relationship, shredded tobacco stagnates at both side exit portions a of the rear channel 10, causing clogging of the chimney and widening of variations in cigarette weight due to shredded tobacco lumps. This phenomenon has been a problem in manufacturing from the standpoint of efficiency and quality improvement.

"Means for Solving the Problems" The present invention was made in view of the above circumstances, and its gist is as stated in the claims for utility model registration at the beginning.

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

Reference numeral 1 designates an endless perforated conveyor belt, which is moved in the direction of arrow b by a drive roller 1-1. An intake chamber 2 is arranged above the perforated conveyor belt 1, and air passes through the perforated conveyor belt 1 and enters the intake chamber 2.
is inhaled. The shredded tobacco conveyed by the air flow of the chimney 3 is adapted to be attracted to the lower surface of the perforated conveyor belt 1. The chimney 3 is
A jet air diffuser 4 is disposed at the lower end of a rectangular passage that is long in the traveling direction of the perforated conveyor belt 1 and blows air toward the chimney 3. Accelerated shredded tobacco is ejected from Winnowa 5 in a direction substantially perpendicular to this ejected air flow. The collector tube 6 sucks air from its outer periphery and acts to direct the direction of travel of the shredded tobacco discharged from the Winnowa 5 toward the chimney 3 side. In this way, the shredded tobacco discharged from the Winnowa 5 rides on the airflow ejected from the jet air diffuser 4 and rises up the chimney 3 to the perforated conveyor belt 1. Large or heavy particles of the cut tobacco ejected from the Winnowa 5 pass through the air stream ejected from the jet air diffuser 4 and are thrown into the front channel 7. The shredded tobacco fed into the front channel 7 is further conveyed to the separator channel 8 for wind separation via the projector roller 7a, and light particles are carried by the upward air flow flowing through the separator channel 8 and returned to the chimney 3. Ru. Heavy particles fall onto the grader roller 9, but heavy particles with small particle diameters are guided to the rear channel 10, where they join the air flow rising through the chimney 3 and are returned. The air velocity ejected from the jet air differential user 4 is lower in the vicinity of the both side walls 11 than in the center due to the resistance of the both side walls 11. Since the air flow in the rear channel 10 is generated by negative pressure according to the air flow velocity ejected from the jet air differential user 4, if this condition is not maintained, the air flow in both sides a of the outlet of the rear channel 10 (see Fig. 2) The chopped tobacco stagnates, causing clogging of the chimney and causing variations in cigarette weight due to clumps. Therefore, an air nozzle 12 is provided in the side wall 11 near the outlet of the rear channel 10 in a substantially horizontal direction.
2 to the piping 13, the on-off valve 14, and the pressure regulating valve 1
5 to a source of pressurized air. The ejection port of the air nozzle 12 is formed into a pore having a diameter of 0.2 to 0.4 mm, and the tip of the nozzle 12 is attached to the same surface as the inner surface of the side wall 11. The on-off valve 14 is connected to a signal line 16
The device is configured to be operated in conjunction with the operation of the cigarette manufacturing device.

"Function" Since the present invention has the above-mentioned configuration, when the cigarette manufacturing device is operated, a small amount of air is ejected at high speed from the nozzle 12 toward both sides of the outlet section a of the rear channel 10. The shredded tobacco returned through both sides of the rear channel 10 to the air stream flowing from the air differential user 4 through the chimney 3 to the perforated conveyor belt 1 is returned to the center of the chimney 3 by the air jets from the air nozzles 12. sent in the direction of the section. The amount of air from the air nozzle 12 is adjusted to an appropriate amount by the pressure regulating valve 15 because if the flow rate is too large, the flow within the chimney 3 will be disturbed.

``Effect'' For this reason, the shredded tobacco stagnates or clumps on both sides of a and then rises up the chimney 3, causing variations in the weight of cigarettes and clogging the chimney. It was possible to overcome the shortcomings. Furthermore, the present invention makes it possible to reduce the cigarette weight variation by approximately 0.10%.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view of an embodiment of the present invention. FIG. 2 is a side sectional view of an embodiment of the present invention. Porous conveyor belt...1, Chimney...3, Rear channel...10, Air jet nozzle...1
2.

Claims (1)

[Scope of utility model registration request] means for discharging shredded tobacco to an ascending air stream flowing toward a perforated conveyor belt; What is claimed is: 1. A cut tobacco feeding device for a cigarette manufacturing apparatus, comprising: a rear channel for carrying the airflow generated by the airflow and returning it to the rising airflow; and air jetting nozzles provided on both sides of the outlet of the rear channel.