JPS6333664Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to a rotary sieve device for sieving materials to be sieved, and is particularly suitable for sieving tobacco leaves, which are the raw material, in the manufacture of cigarettes. The present invention relates to a suitable rotary sieve device.

[Background of conventional technology and its problems]

For example, one type of cigarette manufacturing equipment includes a sieving device that sieves raw tobacco. This sieving device separates small mesophyll pieces and petiole pieces (hereinafter collectively referred to as small leaf pieces) of the raw tobacco leaf that are generated during transportation from the raw tobacco leaf. For example, in the humidity conditioner in the next step, it is possible to prevent the small leaf pieces from adhering to the can wall of the humidity conditioner and clogging the exhaust screen.

By the way, as this type of sieve device, a vibrating sieve device has conventionally been used, and this vibrating sieve device generally consists of a sieve mesh having sieve openings of a predetermined size and a vibration mechanism that vibrates the sieve mesh. It is configured. In other words, the vibrating sieve device vibrates the sieve screen to
It not only allows the small leaf pieces contained in the raw tobacco to be sieved through the sieve screen, but also has the function of transporting the raw tobacco to the humidifier for the next process.

However, in the above-mentioned vibrating sieve device, the end of the petiole of the raw tobacco leaf tends to get caught in the sieve screen, so there is a problem that the sieve screen is easily clogged by the raw tobacco material, and the sieve screen is vibrated. Due to the structure, vibrations are easily transmitted to the surrounding area, and in addition, there is a problem that the noise becomes large. Moreover,
Since the transport speed of raw tobacco is also slow, there is also the problem that the above-mentioned sieving operation cannot be made sufficiently efficient.

On the other hand, it is conceivable to use a rotary sieve device instead of the vibrating sieve device; however, even in the case of this rotary sieve device, during the sieving operation, the sieve mesh is The end of the petiole got caught and the sieve screen was clogged with the raw tobacco, making it unsuitable for practical use.

[Purpose of invention]

This invention was made based on the above-mentioned circumstances, and its purpose is to provide a rotary sieve device that can prevent clogging caused by material to be sieved, as well as perform low-noise and highly effective sieving operations. It is about providing.

[Summary of the idea]

This invention is based on a rotary sieve device in which a rotary sieve extends along the circumferential direction and includes a large number of circumferential crosspiece members arranged at equal intervals in the axial direction; It is composed of a large number of axially inclined bar members which are arranged at equal intervals from each other and are combined with the circumferential bar members to form a lattice-like sieve mesh, and which are inclined in a louver shape. , in each axially inclined bar member, one edge on the side that is rotated first in the rotational direction of the rotary sieve is inclined so that it is located radially inward of the rotary sieve than the other edge; The other edge is positioned so as to overlap the axially inclined bar member adjacent to the rear when viewed in the rotational direction, when viewed in the radial direction of the rotary sieve.

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 1 to 10.

FIG. 1 shows a block diagram schematically showing a part of the cigarette manufacturing equipment, and first, the entire cigarette manufacturing equipment will be briefly explained. 1 in FIG. 1 is a supply device for raw tobacco. This feeding device 1 is constituted by, for example, a conveyor belt, and can feed the raw tobacco to a device for the next step, that is, a sieving device 2 according to an embodiment of the present invention. The sieving device 2 separates the small leaf pieces contained in the raw tobacco, and then supplies the raw tobacco to the humidifier 3 in the next step, the details of which will be described later. The humidity controller 3 applies water and steam to the supplied raw tobacco, thereby making it possible to impart flexibility to the raw tobacco. Thereafter, the raw tobacco is sent from the humidity controller 3 to the deboning machine 4, where it is crushed into a mesophyll part and a leaf bone part consisting of leaf veins and petioles. be done. The raw tobacco thus crushed is then supplied from the deboning machine to the separator 5. This separator 5
The method separates the crushed raw tobacco leaf into the mesophyll part and the leaf bone part, and the separated mesophyll part and leaf bone part are then processed separately in the subsequent process to be finished into product tobacco. It will be done.

In the sieving device 2, the small leaf pieces sieved from the raw tobacco are supplied to the separator 5 via a bypass conveyance path 6 that bypasses the humidity controller 3 and the deboner 4. .

Next, a rotary sieve device 2 according to an embodiment of this invention will be explained with reference to FIG.

In FIG. 2, 10 is a base of the rotary sieve device 2. As shown in FIG. This base 10 includes a base frame 11 and four support legs 12, 1 that support this base frame 11.
2 and 13, and a hydraulic jack 14 (see FIG. 4) consisting of a hydraulic cylinder. The base frame 11 has one support leg 12,1
2 via a pivot shaft 15, and is supported by a hydraulic jack 14 on the other support leg 13 side. In addition, the support legs 13, 13 have
As shown in FIG. 2, arcuate guide grooves 16, 16 are formed around the pivot shaft 15, respectively. Pin 18, 18
is inserted. Therefore, such a base 10
If so, by expanding and contracting the hydraulic jack 14, the base frame 11 can be rotated around the pivot shaft 15, and as the base frame 11 is rotated, the pin 18 of the base frame 11 can be rotated. , 18 are guided along the guide groove 16. Normally, the base frame 11 is held in an inclined position with respect to the floor F so that the support legs 13, 13 side are lower, and the angle of inclination is set to about 6 degrees in this embodiment.

On the base frame 11 of the base 10, receiving members 19 and 20 are arranged on both sides of the base frame 11 in the longitudinal direction. Both ends are rotatably supported. As shown in detail in FIG. 5, this rotary sieve 22 has a pair of ring members 23, 23 made of metal arranged at both ends thereof, and an equal interval in the circumferential direction between these ring members 23, 23. A large number of connecting rods 24 are arranged as shown in FIG. sieve block 25. This sieve block 2
5 will be described later.

A supply hopper 26 for supplying raw tobacco into the rotary sieve 22 is attached to one of the receiving members 19. Above this supply hopper 26, the belt conveyor 1a of the above-mentioned supply device 1 extends, and therefore, the raw tobacco conveyed by this belt conveyor 1a is passed through the supply hopper 26 to the rotary sieve 2.
It can be supplied within 2 days. Further, a delivery chute 27 for raw tobacco is attached to the other receiving member 20, and further below this delivery chute 27, the raw tobacco is transported toward the above-mentioned humidity controller 3 in the next process. A belt conveyor 3a is arranged. Furthermore, an exhaust duct 29 is attached to the receiving member 20 and communicates with the rotary sieve 22, and this exhaust duct 29 is connected to a vacuum pump 30.

Next, referring to FIGS. 2 and 3, the rotary sieve 2
The drive mechanism 31 that rotationally drives 2 will be explained.

The drive mechanism 31 includes a pair of drive rollers 32, 32 on the base frame 11 on the receiving member 19 side. These drive rollers 32, 32 are connected to the rotary sieve 2.
These drive rollers 32, 32 are spaced apart from each other at a predetermined interval in a direction perpendicular to the axial direction of the drive rollers 32, 32.
The roller shafts 33, 33 are rotatably supported by a pair of bearing members 34 mounted on the base frame 11, respectively. Furthermore, drive rollers 32, 32
is in rolling contact with an annular wheel portion, so-called tire 35, attached to the outer peripheral surface of the ring member 23 of the rotary sieve 22.

Sprockets 36 are attached to roller shafts 33, 33 of the drive rollers 32, 32, respectively. Endless chains 39, 39 are spanned between these sprockets 36, 36 and a pair of sprockets 38, 38 attached to the output shaft of an electric motor 37 with a speed reducer, respectively. The electric motor 37 is mounted on the motor support stand 4 attached to the base frame 11.
It is located on 0. Further, chain tighteners 41, 41 for applying tension to the chains 39, 39 are attached to the motor support stand 40.

On the other hand, a pair of driven rollers 42, 42 similar to the driving rollers 32, 32 are arranged on the base frame 11 on the receiving member 20 side. These driven rollers 42, 42 have their roller shafts bearing members 34, 3.
It is rotatably supported by bearing members 43, 43 similar to 4. It goes without saying that these driven rollers 42, 42 are also in rolling contact with a tire 44 attached to the outer peripheral surface of the ring member 23 on the side of the receiving member 20.

Therefore, with such a drive mechanism 31, by driving the electric motor 37, the rotational driving force of the electric motor 37 is transferred to the sprockets 38, 3.
8. Chain 39, 39 and sprocket 36,
36 to the drive rollers 32, 32, thereby causing these drive rollers 32,
32 in the same direction, the rotary sieve 22 can be rotated, for example, in the direction of arrow A in FIG.

A collection hopper 45 is attached to the base frame 11 below the rotary sieve 22. This collecting hopper 45 collects the small leaf pieces of raw tobacco that have been sieved from the rotary sieve 22, and a screw conveyor 46 is rotatably disposed in the lower part of the collecting hopper 45. This screw conveyor 46 collects the small pieces collected in the collection hopper 45 in the center of the collection hopper 45 by its rotation.For example, the screw shaft 47 of this screw conveyor 46 is Motor support stand 4
It can be rotated by an electric motor 48 with a reduction gear located at 0. That is, the rotational driving force is transmitted from the output shaft of the electric motor 48 to the screw shaft 47 by extending an endless chain between sprockets attached to each of these shafts. Therefore, by rotationally driving the screw conveyor 46, the small pieces in the collection hopper 45 are collected in the center thereof, and then flowed from the discharge port formed in the center of the collection hopper 45 to the above-mentioned bypass path. Sent within 6. This bypass path 6 is made of, for example, a pipe member, and by flowing air into this pipe member, the small pieces in the bypass path 6 can be conveyed along with the air flow toward the separator 5 described above. Note that the bypass path 6 is not limited to the above-described configuration, and may be a conveyance path consisting of, for example, a belt conveyor. Incidentally, in FIG. 2, reference numeral 49 indicates a cover of the rotary sieve 22, and this cover 49 is attached to the base frame 11.

Next, referring to FIGS. 6 to 9, the rotary sieve 2
The sieve block 25 forming the second cylindrical sieve will be explained.

FIG. 6 shows the sieve block 25 in its entirety. This sieve block 25 consists of a large number of longitudinal crosspiece members 50, which are made of elongated plate members and arranged at equal intervals from each other, and also made of elongated plate members, which are arranged at equal intervals from each other. It is composed of vertical crosspiece members 50 and horizontal crosspiece members 51 that are combined in a lattice shape. As is clear from FIG. 6, the horizontal crosspiece members 51..., when viewed in the rotational direction A of the sieve block 25,
It is assembled in a lattice shape with respect to the vertical crosspiece members 50 so as to be in a forward-inclined posture. To be more detailed,
The horizontal crosspiece members 51 are combined with the vertical crosspiece members 50 in a louver-like inclined state,
Therefore, when the cylindrical sieve formed by the sieve block 25 is viewed from the outside, the horizontal bar members 51 are inclined so that the inside of the cylindrical sieve cannot be seen through. That is, in each horizontal crosspiece member, one edge of the side that is rotated first when viewed in the rotation direction of the rotary sieve is inclined so that it is located radially inward of the rotary sieve than the other edge, and , the other edge is positioned so as to overlap, when viewed in the radial direction of the rotary sieve, with respect to the horizontal crosspiece member adjacent to the rear when viewed in the rotational direction. Further, when a cylindrical sieve is formed by the sieve block 25, the side edges of the horizontal crosspiece members 51, which are the inner surfaces of the sieve block 25, are provided with a rearward protruding portion as seen in the rotational direction of the rotary sieve 22. A reinforcing edge 52 is integrally formed.

Here, to specifically explain the dimensions of the sieve mesh in the sieve block 25, the dimensions L, W, H, and Θ shown in FIGS. 7 and 8 are 28 mm, 25 mm, and 25 mm, respectively.
mm, 45°. Therefore, if the sieve block 25 has such a dimensional relationship, it is possible to sieve out small leaf pieces of about 25 mm square or less contained in the raw tobacco.

When a cylindrical sieve is formed by combining a large number of the sieve blocks 25 described above, these sieve blocks 25 have their longitudinal bar members 50 along the circumferential direction of the cylindrical sieve, that is, the rotating sieve 22, and the horizontal bar members 51... ... is the rotating sieve 22
It is assembled along the axial direction of the Therefore, the vertical crosspiece members 50 of each sieve block 25 become circumferential crosspieces of the rotary sieve 22, and the horizontal crosspieces 51... become axially inclined crosspieces of the rotary sieve 22.

In addition, the vertical crosspiece member 50 in the sieve block 25
As shown in FIG. 9, the combination of . will be done.

Furthermore, as shown in FIG. 10, on the inner surface of the rotating sieve 22 consisting of the sieve blocks 25, that is, on the inner surface of each connecting rod 24, there is a predetermined interval in the axial direction and a radially inner surface as shown in FIG. A scraping pin 53 extending from... is attached.

In the rotary sieve device 2 described above, the raw tobacco fed from the feeder 1 into the rotary sieve 22 is
As shown by arrows B and C in the figure, the mixture can be stirred and passed through the sieve by rotating the rotary sieve 22.
As a result, the small leaf pieces contained in the raw tobacco are sieved through the rotary sieve 22 and collected in the collection hopper 45. Thereafter, the small pieces collected in the collection hopper 42 are supplied to the separator 5 via the bypass path 6 as described above. Further, since the base frame 11, that is, the rotary sieve 22 is in an inclined position, the raw tobacco fed into the rotary sieve 22 is sent toward the delivery chute 27. Therefore, the sieved raw tobacco is discharged via the delivery chute 27 to the belt conveyor 3a, and is transported by the belt conveyor 3a to the humidifier 3 for the next step.

According to such a rotary sieve device of one embodiment,
Since the rotary sieve can be rotated to sieve raw tobacco containing small leaf pieces, it is possible to significantly reduce noise during operation compared to conventional vibrating sieves. Therefore, it is possible to use a small-capacity drive source for the sieve.

Further, since the rotary sieve 22 can stir the raw tobacco inside it, it has excellent efficiency in sieving small leaf pieces, and can improve the processing capacity of raw tobacco.

Further, in the lattice-shaped sieve block 25 constituting the rotary sieve 22, the horizontal crosspiece members 51...
Since the leaves are inclined like a louver, the petiole of the raw tobacco will not stick to the sieve surface of the sieve block 25 and will not get caught in the sieve block 25. Therefore, it is not only possible to reliably prevent the sieve block 25 from being clogged with raw tobacco, but also to prevent the raw tobacco from accumulating in the rotary sieve 22. Furthermore, some of the raw tobacco leaves have a bent petiole, and this bent petiole is the sieve block 25.
Even if it were to get caught on the sieve surface of the rotary sieve 22, the raw material tobacco would be
Since the horizontal beam members 51 are tilted in the process of being rotated as the horizontal beam members 51 are rotated, this problem can be effectively eliminated. That is, to explain this in more detail, for example, if the petiole of the raw tobacco is in the sieve block 25.
Even if the raw tobacco tobacco gets caught on the sieve surface, when it reaches the area indicated by X in FIG. Therefore, clogging of the sieve mesh due to raw tobacco can be reliably prevented.

This invention is based on the above-mentioned embodiment of the rotary sieve device 2.
It is not limited to. For example, in one embodiment described above, the rotating sieve consists of a number of flat sieve blocks 2.
5 constitutes a polygonal cylindrical sieve, but if a sieve block 25a having a curved shape is used as shown in FIG. 11, a cylindrical cylindrical sieve can be obtained.

[Effect of idea]

According to this invention, since the rotating sieve is used to sieve the material to be sieved, the noise during operation can be reduced and the processing capacity for the material to be sieved can be greatly improved. In addition, since the axial crosspiece of the rotating sieve is inclined in a louver shape, the material to be sieved inside the rotating sieve gets caught on the sieve surface, causing clogging of the sieve. There is no such problem, and excellent effects such as efficient sieving work can be achieved.

[Brief explanation of the drawing]

Figures 1 to 10 show an embodiment of this invention, with Figure 1 being a block diagram schematically showing a part of the cigarette manufacturing equipment, and Figure 2 showing a partially sectional view of the rotary sieve device. 3 is a diagram showing the drive mechanism of the rotary sieve, FIG. 4 is a side view of the rotary sieve device, FIG. 5 is a perspective view of the cylindrical sieve, and FIG. 6 is a perspective view of the sieve block. 7 is a partial plan view of the sieve block, FIG. 8 is a sectional view taken along the middle part of FIG.
FIG. 10 is a sectional view of a rotating sieve, and FIG. 11 is a perspective view of a sieve block that is a modification of this invention. 22... Rotating sieve, 25, 25a... Sieve block, 31... Drive mechanism, 50... Vertical crosspiece member,
51... Horizontal crosspiece member.

Claims (1)

[Scope of utility model registration request] In a rotary sieve device comprising a rotary sieve having a hollow cylindrical shape and a peripheral wall of which is configured as a sieve surface, and a drive mechanism that rotates the rotary sieve in one direction around an axis, the rotary sieve a plurality of circumferential crosspiece members extending along the circumferential direction and arranged at equal intervals from each other in the axial direction; It is composed of a large number of axially inclined bar members that are combined with the circumferential bar member to form a lattice-like sieve, and each axially inclined bar member is
One edge of the side that is rotated as it runs when viewed in the rotational direction of the rotary sieve is inclined so that it is located radially inward of the rotary sieve than the other edge, and the other edge is tilted in the rotation direction. A rotary sieve device characterized in that the rotary sieve is positioned so as to overlap an axially inclined bar member adjacent to the rear when viewed from the radial direction of the rotary sieve.