JPH0131875B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shredded tobacco feeding device for a cigarette making machine that does not cause damage to the device even if the shredded tobacco being fed becomes clogged.

Traditionally, for example, the first cigarette manufacturing machine
The one shown in the figure is known. In the figure, 1 is a feeding device, 2 is a chimney, 3 is a perforated cigarette conveyor, 4 is a trimming device, 5 is a cloth tape, 6 is a wrapping paper, 7 is a gluer, 8 is a heater, and 9 is a density detector , 10 is a cutter.

In this cigarette making machine, the cut tobacco is sucked up through the chimney 2 of the feeding device 1, and is attracted to the lower part of the perforated cigarette conveyor 3 and stacked. The stacked shredded tobacco is carried to the left side when facing the drawing, is trimmed to an appropriate layer thickness by a trimming device 4, is transferred onto a wrapping paper 6 stacked on a cloth tape 5, is wrapped, and is glued by a gluer 7. The cigarette is then dried by the heater 8 to form a rod-shaped cigarette. After the formed rod-shaped cigarette passes through a density detector 9 and its density is measured, it is cut into individual cigarettes by a cutter 10. The cut cigarettes are transferred to a conveyor (not shown) and transported, but a solenoid valve (not shown) is placed along the way to eliminate defective products and transfer only good products to a tray (not shown). It is supposed to be loaded into the

During the operation of the cigarette manufacturing machine, the feeding device 1 feeds densely chopped tobacco in the form of dumplings,
Alternatively, if a foreign substance other than chopped tobacco, such as a piece of a filter plug, gets mixed into the chopped tobacco, the chopped tobacco first stagnates near the trimming device 4, then reaches the flapper (not shown), and then reaches the chimney 2. The shredded tobacco gradually starts to clog from the top.

When the production capacity of a cigarette making machine is around 2,000 cigarettes per minute, even if the operator stops the machine after discovering an abnormality, the chimney 2 will not be filled with shredded tobacco, and no major problems will occur. However, in recent years, various improvements have been made and it has become possible to produce up to about 8,000 pieces per minute, and when a blockage occurs, the blockage progresses in a short period of time and the chimney 2 becomes full. When the chimney 2 is full, shredded tobacco will clog the drum (not shown) installed at the bottom of the chimney 2, and a large load will be applied to the drum (not shown), causing it to malfunction. There was a problem in that the shredded tobacco was compressed and solidified like wood, damaging various parts of the feeding device 1.

The present invention has been made in view of the above circumstances, and its object is to provide a shredded tobacco supply for a cigarette manufacturing machine that immediately stops operation when a blockage occurs, thereby preventing malfunction or damage. The purpose is to provide a transmission device.

In order to achieve the above object, the present invention provides a shredded tobacco feeding device for a cigarette manufacturing machine that forms shredded tobacco from shredded tobacco to a size that can be wrapped in a cigarette paper and sends the shredded tobacco to a cigarette conveyor of the cigarette manufacturing machine. A detection means for detecting when shredded tobacco is clogged in the passage is provided in a passage near the cigarette conveyor in which shredded tobacco of a size that can be wrapped in the passage is sent to the cigarette conveyor, and the clogging is detected from the detection means. It is characterized in that the feeding device is configured to stop when the signal is output.

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

FIG. 2 is a schematic cross-sectional view showing an example of the feeding device A of the cigarette manufacturing machine of the present invention. Cut tobacco is often placed into the storage tank 14 by air blowing. The amount entering the storage tank 14 is determined by the height of the phototube 15. That is,
When the upper surface of the cut tobacco falls below the position of the phototube 15, the cut tobacco is inserted. The shredded tobacco in the storage tank 14 is lifted upward by the needle belt 16, and unnecessary shredded tobacco is scraped off by the roller 17, and only the shredded tobacco between the needles is allowed to pass through. The relationship between the speed of No. 16 and the amount of shredded tobacco passing through is made constant. The passed shredded tobacco is scraped off by the blades 18 and falls into the shredded clump 19. The notches 19 removed by the trimming device 4 (see FIG. 5) are transferred to the vibrating conveyor 20.
The needle belt 16
It joins the cut tobacco transported by the

The chopped tobacco in the chopping block 19 is stored in the first drum 21.
carried upward by needles planted in the first
By the second drum 22 rotating in a direction that obstructs the second drum 22 from passing through the gap with the drum 21, a rod-shaped cut 23 is formed between the first drum 21 and the second drum 22. The size of the bar 23 is kept constant by slowing down the speed of the needle belt 16 when the phototube 24 detects cut tobacco, and increasing the speed of the needle belt 16 when the phototube 24 does not detect cut tobacco. The amount of shredded tobacco passing through the gap between the first drum 21 and the second drum 22 is always constant.

The shredded tobacco that has passed through the gap between the first drum 21 and the second drum 22 is shredded by a picker 25, wrapped in wrapping paper to a suitable size, and is accelerated and discharged by a winoa 26.

The discharged shredded tobacco is made into a homogeneous air flow by the rectifying plate 28 and then blown out from the hole 29, so that light objects are attracted to the suction roller 30 and ascend the chimney 31. , are stacked on a perforated cigarette conveyor 3 (see FIG. 5). The heavy objects travel straight ahead and are dumped into a channel 33 by a dumping drum 32, as shown in detail in FIG. At the bottom of the channel 33 there is an air window 34, and since the air is flowing upwards, only heavy objects, ie stems mixed in the cut tobacco, fall onto the perforated rollers 35.

A large number of holes are made in the perforated roller 35, and the stems separated from the shredded tobacco are classified, and the stems that enter the holes are returned to the flow of shredding through a channel 36 as usable stems. .
Large stems that cannot fit into the holes are removed by the brush roller 37 and carried out by the air pipe 38 (see FIG. 2).

FIG. 4 shows the power transmission mechanism. The entire cigarette making machine is mounted on a base 39. The rotational force of the main motor 40 is transmitted through pulleys 41 and 4.
2 and 43 to the main shaft 44, and from the main shaft 44 to the feeding device A via pulleys 45 and 46.

In addition, a brake 48 is attached to the shaft 47 of the pulley 42.
A brake 48 is provided to stop the operation in a short period of time.

The pulley 46 is a power input part of the feeding device A, and the rotational force of the pulley 46 is transmitted through an electromagnetic coupling 49 (second
), the above-mentioned needle belt 16, scraping roller 17, blade 18,
It is transmitted to the first drum 21, the second drum 22, the perforated roller 35, etc., and drives these to rotate.

During normal operation, voltage is applied to the electromagnetic coupling 49, and the rotational force of the pulley 46 is transmitted to the shaft. An electromagnetic brake 50 is connected to this shaft. During normal operation, this electromagnetic brake 50 does not operate.

As shown in FIGS. 2 and 5, the chimney 31 is provided with a reflective photoelectric detector 52 near its exit (near the cigarette conveyor 5 and near the flapper 51).

As shown in FIG. 6a, the photoelectric detector 52 irradiates light onto the inner wall surface 31a so as to cross the shredded tobacco rising along the air flow inside the chimney 31, and detects the light reflected from the inner wall surface 31a. The presence or absence of a blockage is detected by injecting the When the cut tobacco becomes clogged, the reflected light is not incident, and the output of the photoelectric detector 52 changes, as shown in FIG. 5B, for example.

The output of the photoelectric detector 52 is input to a clogging detection circuit 53, where it undergoes predetermined signal processing.
When the clogging detection circuit 53 detects clogging based on the output from the photoelectric detector 52, it outputs a control signal to stop applying voltage to the electromagnetic joint 49 and start applying voltage to the electromagnetic brake 50. do.

In addition, when using a transmission type photoelectric detector 52, as shown in FIG. 6c, the light source 5
2a are placed facing each other, and the light is passed through the photoelectric detector 52 so as to cross the cut tobacco rising inside the chimney 31.
irradiate. When the cut tobacco becomes clogged, for example, as shown in d in the same figure, no light is incident,
The output of the photoelectric detector 52 changes.

Next, the operation of the above embodiment will be explained.

The shredded tobacco of a size that can be wrapped in the wrapping paper 6 formed as described above is transported from the chimney 31 to the perforated cigarette conveyor 3 located on the lower surface of the intake chamber 54.
It is adsorbed and laminated on the bottom of the. The adsorbed and stacked shredded tobacco is transported to the left side of FIG. At this time, the flapper 51 prevents air from flowing into the chimney 31 and disturbing the layer of shredded tobacco.

The shredded tobacco is conveyed by a cigarette conveyor 3, cut into an appropriate layer thickness by a trimming device 4, and excess shredded tobacco is returned to the shredded pile 19 by a vibrating conveyor 20.

The shredded tobacco transported in this way is covered with cloth tape 5.
It is transferred onto the wrapping paper 6 stacked on top, compressed, formed into a circular cross-section, and wrapped.

During this operation, if, for example, densely chopped tobacco in the form of dumplings is fed, or if foreign objects such as pieces of filter plugs get mixed into the chopped tobacco, the chopped tobacco will first stagnate near the trimming device 4. Then, it reaches the flapper 51, after which the shredded tobacco starts to clog from above the chimney 31.

When shredded tobacco begins to clog, the output of the photoelectric detector 52 changes, a control signal is output from the clogging detection circuit 53, the electromagnetic coupling 49 is released, the rotational force of the pulley 46 is no longer transmitted to the shaft, and the electromagnetic The brake 50 operates to stop the rotation of the shaft.

This immediately stops the rotation of the needle belt 16, scraping roller 17, blade 18, drums 21, 22, etc., and prevents the chimney 31 from becoming full of shredded tobacco and causing malfunction or damage. can.

Note that the feeding device A usually has only a small inertia, so even if the electromagnetic brake 50 is omitted, there is a slight time delay, but the chimney 31 will be full of shredded tobacco and it will not malfunction or be damaged. can be prevented.

Further, the feeding device A is not limited to the type of the embodiment, but can be applied to various types.

As explained above, according to the present invention, when shredded tobacco becomes clogged in the passage (chimney 31) near the cigarette conveyor, the passage (chimney 31) sends shredded tobacco of a size that can be wrapped in wrapping paper to the cigarette conveyor. Detection means (photoelectric detector 52,
Since a clogging detection circuit 53) is provided and the feeding device is configured to stop when a clogging detection signal is output from the detection means, the feeding device can be stopped immediately when clogging starts. Therefore, even if the production capacity of cigarettes is improved, malfunctions and damage due to clogging of cut tobacco can be avoided.

[Brief explanation of drawings]

Fig. 1 is a front view showing the entire conventional cigarette making machine, Figs. 2 to 5 and Figs. 6 a to 6 d show an embodiment of the present invention, and Fig. 2 is a schematic cross-sectional view; Fig. 3 is a partially enlarged view, Fig. 4 is a schematic exploded perspective view showing the power transmission mechanism, Fig. 5 is a schematic diagram showing the structure around the cigarette conveyor, and Figs. 6 a to d are explanations of the operation of the photoelectric detector. It is a diagram. 3... Cigarette conveyor, 31... Chimney,
52... Photoelectric detector, 53... Clogging detection circuit detection means, 49... Electromagnetic coupling.

Claims (1)

[Claims] 1. In the shredded tobacco feeding device of a cigarette manufacturing machine, which forms shredded tobacco into a size that can be wrapped in cigarette paper and sends it to the cigarette conveyor of the cigarette manufacturing machine, cut tobacco of a size that can be wrapped in cigarette paper is sent to the cigarette conveyor of the cigarette manufacturing machine. A detection means for detecting when shredded tobacco is clogged in the passage is provided in the passage for feeding the cigarettes to the cigarette conveyor, and when a clogging detection signal is output from the passage, the feeding device A shredded tobacco feeding device for a cigarette manufacturing machine, characterized in that the shredded tobacco feeding device is configured to stop.