WO2023067728A1 - Cigarette and method for producing same - Google Patents

Abstract

This cigarette is provided with a tobacco rod and a filter connected to the rear end of the tobacco rod with a piece of chip paper, in which the filter has a thermally active flavor source that releases a flavor component when activated with a thermal energy, the tobacco rod is provided with a plurality of thin rods and a piece of outside wrapping paper that wounds the plurality of thin rods in a bundled state, each of the plurality of thin rods is provided with a piece of inside wrapping paper and shredded tobacco filled in the piece of inside wrapping paper, a heated gas passage through which a heated gas generated on the lighting end is introduced to the thermally active flavor source extends at the center of a cross-section of the tobacco rod along the axis direction from the front end of the tobacco rod to the rear end of the tobacco rod, and the heated gas passage is defined by the outer surfaces of the pieces of inside wrapping paper in the plurality of thin rods.

Description

Cigarette and manufacturing method thereof

The present invention relates to cigarettes and manufacturing methods thereof.

Cigarettes are known in which a thermally activated flavor source that releases flavor components when activated by thermal energy is arranged in a filter connected via tipping paper to the rear end of a tobacco rod formed by winding shredded tobacco with wrapping paper. there is In relation to this, a hollow tube extending axially from the front end to the rear end of the tobacco rod is arranged on the center side of the cross section of the tobacco rod, and the hot gas emitted from the ignition end of the cigarette is passed through the hollow tube. It is known to supply a heat-activated flavor source in a filter (see, for example, US Pat.

For example, Patent Document 1 discloses manufacturing the above-described hollow tube from carboxymethyl cellulose (CMC) or an appropriate film material. Also, US Pat. No. 6,200,003 discloses making the peripheral wall of a hollow tube out of paper or reconstituted tobacco sheet.

Japanese Patent No. 4312791 Japanese Patent No. 3012714

However, in conventional cigarettes, it is not easy to extend the peripheral wall of the hollow tube along the axial direction of the tobacco rod, and there is room for improvement in manufacturing aptitude.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and its object is to provide a technique for improving the manufacturability of a tobacco rod having a hot gas passage that is hollow along the axial direction. be.

A cigarette according to the present invention for solving the above problems comprises a tobacco rod and a filter connected to the rear end of the tobacco rod via tipping paper, the filter being activated by thermal energy. the tobacco rod comprises a plurality of thinly wound rods and an outer wrapping paper for bundling and winding the plurality of thinly wound rods; Each of the rods has an inner wrapping paper and shredded tobacco filled inside the inner wrapping paper. A hot gas passage for leading to a flavor source extends axially from the front end to the rear end of the tobacco rod, the hot gas passage extending along the outer surface of the inner web of the plurality of narrow rods. stipulated by

Further, the plurality of thinly wound rods may be arranged around the hot gas passage in the cross section of the tobacco rod.

In addition, the inner roll of paper in the plurality of thin rods may be adhered to the outer roll of paper.

Also, the plurality of thinly wound rods may have an elliptical cross section, and the short axis direction thereof may be arranged along the radial direction of the tobacco rod.

Further, the cigarette according to the present invention is a leak suppressing portion connected to the rear end of the tobacco rod, and has an air passage extending in the axial direction for circulating tobacco smoke generated in the plurality of thinly wound rods. In addition, a leak suppressing portion having a blocking portion that closes a rear end of a gap formed between the adjacent thinly wound rods may be arranged at the front end portion of the mouthpiece portion.

In addition, the present invention can be specified as a cigarette manufacturing method. That is, in the cigarette manufacturing method according to the present invention, a tobacco rod and a mouthpiece portion connected to the rear end of the tobacco rod via tipping paper are activated by thermal energy to release flavoring components. and a mouthpiece portion having a heat-activatable flavor source, wherein a plurality of thinly rolled rods obtained by winding shredded tobacco with an inner winding paper are bundled together and integrally wound with an outer winding paper, a step of forming a tobacco rod in which a hot gas passage defined by the outer surface of the inner winding paper in each thin roll extends axially in the central portion of the cross section; and forming the mouthpiece portion in series with the tobacco rod. a connecting step of arranging and winding them together with chip paper.

In addition, the step of forming the tobacco rod includes winding the shredded tobacco continuously in the longitudinal direction using a long sheet-like thin winding paper, thereby forming a plurality of long thin rods in parallel in the conveying direction of the winding machine. and a long tobacco rod forming step of forming a long thin rolled rod by joining the plurality of long thin rolled rods and integrally winding them by a long outer winding paper while joining them. and a cutting step of forming the tobacco rod by cutting the long tobacco rod to a predetermined length.

In addition, in the step of forming the tobacco rod, on a long sheet-like long outer roll paper conveyed on a conveying path of a winder, a length twice as long as the first part constituting a part of the mouthpiece portion is formed. A plurality of double-length first parts each having a length twice as long as the narrow rod are provided in the rod mounting spaces formed between the double-length first parts at predetermined intervals. After the length thinly wound rods are supplied so as to be bundled, the double length first component and the bundle of the double length thinly wound rods arranged in series therewith are integrally wound up by the long outer winding paper, whereby a long tobacco rod is obtained. and cutting the long tobacco rod at the center position in the length direction of the double-length first component and the center position in the length direction of the double-length thin roll rod, respectively. forming an intermediate assembly in which the first component is connected to the tobacco rod by the connecting step, wherein the one or more second components forming part of the mouthpiece are cut from the The intermediate assembly and the one or more second components may be integrally wound with tipping paper while being arranged in series with the first component in the intermediate assembly.

It should be noted that the means for solving the problems in the present invention can be employed in combination as much as possible.

According to the present invention, it is possible to provide a technique for improving the manufacturability of tobacco rods having hot gas passages that are hollow along the axial direction.

1 is a diagram schematically showing the internal structure of a cigarette according to Embodiment 1; FIG. 2 is a view in the direction of arrow A in FIG. 1. FIG. 3A and 3B are diagrams for explaining a leak suppression unit according to the first embodiment. FIG. FIG. 4 is a diagram showing a procedure for manufacturing a cigarette according to Embodiment 1. FIG. FIG. 5 is a diagram illustrating a hoist for manufacturing tobacco rods according to Embodiment 1. FIG. 6A and 6B are diagrams for explaining the process of manufacturing the tobacco rod according to Embodiment 1. FIG. 7A and 7B are diagrams for explaining the process of manufacturing the tobacco rod according to Embodiment 1. FIG. 8A and 8B are diagrams for explaining the state of the process of manufacturing the tobacco rod according to Embodiment 1. FIG. FIG. 9 is a diagram for explaining the long tobacco rod forming process according to the second manufacturing method. FIG. 10 is a diagram illustrating the shape of a cross-sectional direction perpendicular to the conveying direction of the conveyor. 11A and 11B are diagrams for explaining the state of supply of leakage suppression parts and supply of various parts by each thin winding rod supply drum at the first to fourth positions. FIG. 12 is a diagram for explaining the long tobacco rod forming process according to the second manufacturing method. FIG. 13 is a diagram showing an intermediate assembly formed in the process of forming a tobacco rod, and a separately prepared cooling section, filter section, and tipping paper. FIG. 14 shows a cigarette manufactured by the second manufacturing method. FIG. 15 is a schematic diagram showing the state of the cigarette during smoking. FIG. 16 is a front view of a leak suppressing portion according to a modification, viewed from the closed surface side. 17 is a cross-sectional view of a tobacco rod according to Embodiment 2. FIG. 18A and 18B are diagrams for explaining the manufacturing process of the tobacco rod according to Embodiment 2. FIG. FIG. 19 is a diagram for explaining an outline of hardness measurement of a finely wound rod.

Here, an embodiment of the cigarette according to the present invention will be described based on the drawings. It should be noted that the dimensions, materials, shapes, relative arrangements, etc. of the constituent elements described in this embodiment are not intended to limit the technical scope of the invention unless otherwise specified. do not have.

<Embodiment 1>
FIG. 1 is a diagram schematically showing the internal structure of a cigarette 1 according to Embodiment 1. FIG. 2 is a view in the direction of arrow A in FIG. 1. FIG.

The cigarette 1 is a filtered cigarette including a tobacco rod 2 and a mouthpiece portion 3 connected to the rear end of the tobacco rod 2 via tipping paper 8 . The tobacco rod 2 and the mouthpiece portion 3 have a cylindrical rod shape with the same diameter and are coaxially arranged by the tipping paper 8 . Symbol CL is the central axis of the cigarette 1 and the central axis of the tobacco rod 2 and the mouthpiece portion 3 .

Reference numeral 1a denotes the mouthpiece end 1a formed on the rear end side of the cigarette 1 (mouthpiece portion 3), and reference numeral 1b denotes the front end of the cigarette 1 (tobacco rod 2). When smoking the cigarette 1, the front end 1b is ignited as the ignition end.

The tobacco rod 2 has a plurality of thinly wound rods 21 and an outer winding paper 22 for bundling and winding the plurality of thinly wound rods 21 . Each thin rod 21 constituting the tobacco rod 2 includes an inner winding paper 23 and shredded tobacco 24 filled inside the inner winding paper 23 . Reference numeral BP shown in FIG. 2 indicates a bonding portion where the outer surface 23A of the inner paper roll 23 of each thin rod 21 is bonded to the inner surface 22A of the outer paper roll 22 . In the configuration example shown in FIG. 2, the tobacco rod 2 has three finely wound rods 21, but the number of finely wound rods 21 is not particularly limited as long as it is two or more. Each thin rolled rod 21 has a central axis extending parallel to the central axis CL of the cigarette 1 and extends over the entire length of the tobacco rod 2 .

Various kinds of tobacco can be used for the cut tobacco 24. Examples include yellow, burley, oriental, landrace, other Nicotiana-tabacum varieties, Nicotiana-Rustica varieties, and mixtures thereof.

In the example shown in FIG. 2, each thin rolled rod 21 has an elliptical cross section, and the short axis direction is arranged along the radial direction of the tobacco rod 2 . More specifically, the short axis of each thin rolled rod 21 is arranged to extend radially around the central axis CL of the tobacco rod 2 . The three thinly wound rods 21 having an elliptical shape are arranged in contact with the inner surface 22A of the outer winding paper 22 so that a hollow portion is formed in the central portion of the cross section of the tobacco rod 2 . Hereinafter, the hollow portion formed in the central portion of the cross section of the tobacco rod 2 will be referred to as "hot gas passage 25". The hot gas passage 25 extends from the front end to the rear end of the tobacco rod 2 along the central axis CL. It should be noted that the shape of each thinly wound rod 21 may adopt a shape other than an elliptical shape. Further, in the example shown in FIG. 2, an outer peripheral side gap portion 26 is formed near the outer peripheral side of the cross section of the tobacco rod 2 .

The hot gas passage 25 is defined (demarcated) by the outer surface 23A of the inner web 23 of the plurality of (three in this embodiment) thin rods 21 . That is, in this embodiment, the hot gas passage 25 of the tobacco rod 2 is surrounded by a plurality of thinly wound rods 21. In other words, the plurality of thinly wound rods 21 are arranged around the hot gas passage 25. It is The outer surface 23A of the inner winding paper 23 is the surface opposite to the surface (inner surface) on which the shredded tobacco 24 is wound. Although FIG. 2 exemplifies the cross section of the hot gas passage 25 as having a shape similar to a triangle, the shape of the hot gas passage 25 is not particularly limited.

Next, the mouthpiece section 3 will be explained. The mouthpiece part 3 has a leak suppression part 4 , a flavor source segment 5 , and a filter segment 6 from the front end side, and these are integrally wound up by a winding paper 7 . The leak suppressing portion 4 is a member for suppressing ventilation through the outer peripheral side gap portion 26 . Details of the leak suppression unit 4 will be described later. A thermally activated flavor source 50 is located in the flavor source segment 5 . Thermally activated flavor sources 50 release flavor components upon activation by thermal energy. The heat-activatable flavor source 50 may be, for example, a heat-dissolvable capsule containing a flavor component such as a perfume. Further, the heat-activated flavor source 50 may be configured such that plant leaves such as tobacco leaves and herbs are arranged in the flavor source segment 5 .

The type of flavor contained in the thermally activated flavor source 50 is not particularly limited. Examples of fragrances include acetoanisole, acetophenone, acetylpyrazine, 2-acetylthiazole, alfalfa extract, amyl alcohol, amyl butyrate, trans-anethole, star anise oil, apple juice, Peruvian balsam oil, beeswax absolute, benzaldehyde, benzoin. Resinoids, benzyl alcohol, benzyl benzoate, benzyl phenylacetate, benzyl propionate, 2,3-butanedione, 2-butanol, butyl butyrate, butyric acid, caramel, cardamom oil, carob absolute, beta-carotene, carrot juice, L-carvone , β-caryophyllene, cassia bark oil, cedarwood oil, celery seed oil, chamomile oil, cinnamaldehyde, cinnamic acid, cinnamyl alcohol, cinnamyl cinnamate, citronella oil, DL-citronellol, clary sage extract, cocoa, coffee, Cognac oil, coriander oil, cuminaldehyde, davana oil, δ-decalactone, γ-decalactone, decanoic acid, dill herb oil, 3,4-dimethyl-1,2-cyclopentanedione, 4,5-dimethyl-3-hydroxy -2,5-dihydrofuran-2-one, 3,7-dimethyl-6-octenoic acid, 2,3-dimethylpyrazine, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, ethyl 2-methylbutyrate, Ethyl acetate, ethyl butyrate, ethyl hexanoate, ethyl isovalerate, ethyl lactate, ethyl laurate, ethyl levulinate, ethyl maltol, ethyl octanoate, ethyl oleate, ethyl palmitate, ethyl phenylacetate, ethyl propionate, stearin ethyl acetate, ethyl valerate, ethyl vanillin, ethyl vanillin glucoside, 2-ethyl-3,(5 or 6)-dimethylpyrazine, 5-ethyl-3-hydroxy-4-methyl-2(5H)-furanone, 2- Ethyl-3-methylpyrazine, eucalyptol, fenugreek absolute, gene absolute, gentian root infusion, geraniol, geranyl acetate, grape juice, guaiacol, guava extract, γ-heptalactone, γ-hexalactone, hexanoic acid, cis -3-hexen-1-ol, hexyl acetate, hexyl alcohol, hexyl phenylacetate, honey, 4-hydroxy-3-pentenoic acid lactone, 4-hydroxy-4-(3-hydroxy-1-butenyl)-3,5 , 5-trimethyl-2-cyclohexen-1-one, 4-(para-hydroxyphenyl)-2-butanone, sodium 4-hydroxyundecanoate, inmoltel absolute, β-ionone, isoamyl acetate, isoamyl butyrate, phenylacetic acid Isoamyl, isobutyl acetate, isobutyl phenylacetate, jasmine absolute, cola nut tincture, labdanum oil, lemon terpeneless oil, licorice extract, linalool, linalyl acetate, lobage root oil, maltol, maple syrup, menthol, menthone, L-acetic acid Menthyl, para-methoxybenzaldehyde, methyl-2-pyrrolyl ketone, methyl anthranilate, methyl phenylacetate, methyl salicylate, 4'-methylacetophenone, methylcyclopentenolone, 3-methylvaleric acid, mimosa absolute, honey, myristic acid, nerol, Nerolidol, γ-nonalactone, nutmeg oil, δ-octalactone, octanal, octanoic acid, orange flower oil, orange oil, orris root oil, palmitic acid, ω-pentadecalactone, peppermint oil, petitgrain Paraguay oil, phenethyl alcohol , phenethyl phenylacetate, phenylacetic acid, piperonal, plum extract, propenyl guaetol, propyl acetate, 3-propylidenephthalide, prune juice, pyruvic acid, raisin extract, rose oil, rum, sage oil, sandalwood. oil, spearmint oil, styrax absolute, marigold oil, tea distillate, α-terpineol, terpinyl acetate, 5,6,7,8-tetrahydroquinoxaline, 1,5,5,9-tetramethyl-13-oxacyclo ( 8.3.0.0 (4.9)) tridecane, 2,3,5,6-tetramethylpyrazine, thyme oil, tomato extract, 2-tridecanone, triethyl citrate, 4-(2,6,6) -trimethyl-1-cyclohexenyl)2-buten-4-one, 2,6,6-trimethyl-2-cyclohexene-1,4-dione, 4-(2,6,6-trimethyl-1,3-cyclohex sadienyl)2-buten-4-one, 2,3,5-trimethylpyrazine, γ-undecalactone, γ-valerolactone, vanilla extract, vanillin, veratraldehyde, violet leaf absolute, N-ethyl-p -menthane-3-carboamide (WS-3), ethyl-2-(p-menthane-3-carboxamide)acetate (WS-5), with menthol being particularly preferred. Moreover, these fragrance|flavors may be used individually by 1 type, or may use 2 or more types together.

The filter segment 6 is a segment located on the rear end of the mouthpiece portion 3, that is, on the side of the mouthpiece end 1a. The filter segment 6 may contain, for example, a filter material that collects a predetermined component contained in the smoke generated by the gradual burning of the cut tobacco 24 from the ignition end side of the tobacco rod 2 . The type of filter material forming the filter segments 6 is not particularly limited. For example, filter segment 6 may comprise a filter material formed from cylindrically shaped cellulose acetate fibers. Alternatively, the filter segment 6 may be a center-hole filter in which a center hole is formed along the axial direction of cellulose acetate fibers molded into a cylindrical shape. Moreover, the filter segment 6 may be a paper filter filled with cellulose fibers, or may be a paper tube containing no filter medium. Alternatively, the filter segment 6 may be formed by selectively combining a solid filter material having a filter medium, a center hole filter, a paper filter, or a paper tube containing no filter medium.

FIG. 3 is a diagram explaining the leak suppression unit 4 according to the first embodiment. (a) is a perspective view of the leak suppression unit 4. FIG. (b) is a front view of the leak suppressing portion 4 viewed from the side of the blocking surface 42. FIG. The dashed line shown in FIG. 10 indicates the cross-sectional outline of each thin winding rod 21, that is, the position of the outer surface 23A on the inner paper roll 23. As shown in FIG. The leak suppression section 4 is arranged at the front end of the mouthpiece section 3 . More specifically, the leak suppressor 4 is positioned between the tobacco rod 2 and the flavor source segment 5 (heat-activated flavor source 50 ), and is arranged with its front end in contact with the rear end of the tobacco rod 2 . there is The leak suppressing portion 4 is a perforated columnar body in which a through hole is formed as an air passage 41 in the central portion of the cross section orthogonal to the central axis CL, and the portion other than the air passage 41 is formed as a blocking portion 43 . . A reference numeral 42 denotes a closing surface formed at the front end of the closing portion 43 . A symbol CL2 is the central axis of the leak suppression unit 4 . Leakage suppressor 4 is arranged such that central axis CL2 is coaxial with central axis CL1 of cigarette 1 .

As shown in (b) of FIG. 3 , the leak suppressing portion 4 has a closing portion 43 (closed surface 42 ) disposed facing the outer gap 26 in the tobacco rod 2 , thereby preventing the leakage behind the outer gap 26 . closed at the ends. Also, the air passage 41 of the leak suppressing portion 4 is arranged so as to face at least a portion of the hot gas passage 25 in the tobacco rod 2 and at least a portion of each thin winding rod 21 . In the example shown in FIG. 3B, the entire rear end of the hot gas passage 25 is arranged to face the ventilation passage 41, and each thin rod 21 is partially arranged to face the ventilation passage 41. In the example shown in FIG.

Next, a method for manufacturing the cigarette 1 according to this embodiment will be described. The cigarette 1 is manufactured by bundling a plurality of finely wound rods, each of which is obtained by winding shredded tobacco with an inner winding paper, and winding them integrally with an outer winding paper. a step of forming a tobacco rod in which the hot gas passage extends axially in the central portion of the cross section; a connecting step of arranging the mouthpiece portion in series with the tobacco rod and winding them integrally with tipping paper; including. Here, in the step of forming the tobacco rods, a plurality of long thin rolled rods are formed in the conveying direction of the hoist by continuously winding the shredded tobacco in a long sheet-like thin winding paper in the longitudinal direction. A step of forming a long thin rolled rod in parallel, and a long tobacco rod forming step of forming a long tobacco rod by joining a plurality of long thin rolled rods and integrally winding them with a long outer winding paper. and a cutting step of forming a tobacco rod by cutting a long tobacco rod to a predetermined length will be described with reference to FIGS. 4 to 8. FIG.

FIG. 4 is a diagram showing the manufacturing procedure of the cigarette 1 according to the first embodiment. FIG. 5 is a diagram illustrating sections in a hoist for manufacturing the tobacco rod 2 according to Embodiment 1. FIG. 6 to 8 are diagrams for explaining the process of manufacturing the tobacco rod 2 according to Embodiment 1. FIG. In the following, a case of manufacturing the tobacco rod 2 having the three thinly wound rods 21 as described with reference to FIG. 2 will be described as an example. The tobacco rod 2 can be manufactured using a known hoisting machine as disclosed in Japanese Patent Application Laid-Open No. 7-184625, for example.

First, in the thin roll forming section 101 of the winding machine, the shredded tobacco 24 is continuously wound in the longitudinal direction into a circular cylinder shape by the long sheet-like thin roll paper 23P to form a long long cylinder having a cylindrical cross section. The long thin wound rods 21P1 to 21P3 are formed (long thin wound rod forming step). Each of the long thinly wound rods 21P1 to 21P3 has an elongated shape, and finally becomes each thinly wound rod 21 by being cut into a predetermined length.

FIG. 6 shows long finely wound rods 21P1 to 21P3 formed by the finely wound forming section 101. FIG. The thin winding forming section 101 includes three parallel winding lines L1 to L3 for winding the long thin rods 21P1 to 21P3 in parallel, and the long thin rods 21P1 to 21P3 run parallel to each other on the lines. It is designed to be wound up in a parallel state.

The thin roll forming section 101 has a tobacco feeding section 101A for each of the winding lines L1 to L3, and a forming section 101B positioned downstream thereof. The tobacco supply section 101A of each winding line L1 to L3 continuously supplies the shredded tobacco 24 onto the long belt-like long inner winding paper 23P conveyed along the conveying path. The type of shredded tobacco 24 supplied from the tobacco supply section 101A onto the long inner paper roll 23P may be different or the same for each of the winding lines L1 to L3. In the forming section 101B of each winding line L1 to L3, the inner long roll paper 23P after the tobacco shreds 24 are supplied is gradually squeezed from the outer surface side to roll up the inner long roll paper 23P into a cylindrical shape.

The molding section 101B rolls up the shredded tobacco 24 while molding the long inner roll paper 23P into a cylindrical shape, for example, by passing it through the inside of a guide member having a cylindrical guide inner wall surface. This type of guide member is known, and for example, the tongue disclosed in Japanese Patent Application Laid-Open No. 7-184625 can be used. For example, the cylindrical guide inner wall surface of the guide member gradually decreases in diameter toward the downstream side of the transport path, and the long inner roll paper 23P is guided by the cylindrical guide inner wall surface when passing inside the guide member. As a result, the long inner paper roll 23P is formed into a cylindrical shape through a U-shaped cross section. In the process of forming the long inner roll paper 23P into a cylindrical shape, the shredded tobacco 24 arranged inside the long inner roll paper 23P is appropriately compressed by the inner wall surface of the cylindrical guide. As described above, the long inner roll paper 23P is formed into a cylindrical shape, and the widthwise ends of the long inner roll paper 23P are overlapped and adhered to each other. As a result, as shown in FIG. 6, long cylindrical long narrow rods 21P1 to 21P3 are obtained.

Next, in the thick winding forming section 102 of the hoist, the plurality of long thin winding rods 21P1 to 21P3 conveyed on the conveying path are joined and wound together by the long outer winding paper 22P to form a cylindrical cross section. (long tobacco rod forming step).

FIG. 7 shows a state in which a plurality of long thin roll rods 21P1 to 21P3 are placed in a bale shape on the long belt-like long outer roll paper 22P conveyed on the conveying path in the thick roll forming section 102. ing. In the thick roll forming section 102, as shown in FIG. 6, a plurality of long thin roll rods 21P1 to 21P3 are aligned on the long outer roll paper 22P, and the outer long roll paper 22P is formed into a cylindrical shape. The ends of the long outer paper roll 22P in the width direction are overlapped and adhered. As a result, as shown in FIG. 8, a long tobacco rod 2P having a long cylindrical cross section is obtained.

When the long tobacco rod 2P is formed into a cylindrical cross section in the thick roll forming section 102, the guide member (for example, the guide member disclosed in Japanese Patent Application Laid-Open No. 7-184625) as described for the forming portion 101B is used. tongs) can be used. In the process of forming the long outer roll paper 22P into a cylindrical shape by the guide member, each of the long thin roll rods 21P1 to 21P3 located inside the long outer roll paper 22P is moderately compressed by the inner wall surface of the cylindrical guide of the guide member. be. As a result, while the cross section of each of the long thin wound rods 21P1 to 21P3, which initially has a circular shape (substantially perfect circular shape), is deformed into an elliptical shape, the space surrounded by each of the long thin wound rods 21P1 to 21P3 is formed. A hollow portion 25P serving as the hot gas passage 25 can be formed. The diameters (before compression) of the respective long thin winding rods 21P1 to 21P3 may be the same or different. In the former case, for example, if the diameter of the tobacco rod is 7 mm, the diameter (before compression) of each of the long thin winding rods 21P1 to 21P3 may be set to about 3.5 mm to 4 mm.

Further, in the long tobacco rod forming step, the long inner winding paper 23P corresponding to each of the long thin winding rods 21P1 to 21P3 is attached to the inner surface of the long outer winding paper 22P that bundles the plurality of long thin winding rods 21P1 to 21P3. Glue for adhering the long outer roll paper 22P (referred to as “rail glue” in the technical field) is applied linearly along the longitudinal direction of the long outer roll paper 22P, and then the long outer roll paper 22P is applied. Each of the long thin winding rods 21P1 to 21P3 is wound. As a result, each of the long thin roll rods 21P1 to 21P3 can be adhered to the long outer roll paper 22P. It should be noted that the adhesion points of the long thin rods 21P1 to 21P3 to the long outer roll paper 22P correspond to the above-described adhesion portions BP.

As described above, by compressing the long thin rods 21P1 to 21P3 from the outside and winding them integrally by the long outer winding paper 22P, a plurality of long thin rods 21P1 to 21P3 having elliptical cross sections are obtained. inside the long outer winding paper 22P, and a hollow portion 25P (hot gas passage 25) along the longitudinal direction in the central portion of the cross section.

Next, in the cutting section 103 of the hoist, the long tobacco rod 2P conveyed along the conveying direction is sequentially cut into predetermined lengths (for example, the length of one tobacco rod). cutting process). As a result, a tobacco rod 2 having a predetermined length is obtained. After cutting the long tobacco rod 2P into a predetermined length, the cross-sectional shape of the tobacco rod 2 is inspected, and feedback control is performed to adjust the position of the thinly wound rod 21 in the cross section, the filling amount of the shredded tobacco 24, and the like. may be performed.

Then, the mouthpiece portion 3 is prepared separately, and the tobacco rod 2 and the mouthpiece portion 3 are wound integrally through the chipping paper 8 to be connected (connecting step). Thereby, the cigarette 1 shown in FIG. 1 is obtained.

Next, a manufacturing method (second manufacturing method) different from the manufacturing method (hereinafter referred to as "first manufacturing method") described with reference to FIGS. 4 to 8 will be described. 9 to 14 are diagrams for explaining the second manufacturing method of the cigarette 1. FIG. The second manufacturing method of the cigarette 1 has a tobacco rod forming step and a connecting step, and the tobacco rod forming step further includes a long tobacco rod forming step and a cutting step. The step of forming a tobacco rod according to the second manufacturing method can be realized, for example, by diverting an existing dual filter winder. FIG. 9 is a diagram illustrating the first half of the long tobacco rod forming process according to the second manufacturing method. Reference numeral 110 shown in FIG. 8 denotes a conveyor that conveys various materials for manufacturing the cigarette 1 along the directions of white arrows (conveying directions) in the drawing. As shown in FIG. 9, on the conveyor 110, the long outer roll paper 22P is conveyed. FIG. 10 is a diagram illustrating the shape of the conveyor 110 in a cross-sectional direction orthogonal to the conveying direction. The conveyor 110 has a concave groove portion 110A along the conveying direction, and conveys the long outer roll paper 22P and other various materials while receiving them in the groove portion 110A. For example, the groove bottom of the groove portion 110A of the conveyor 110 is formed with a suction hole that applies a suction pressure to the long outer roll paper 22P. The outer roll paper 22P is conveyed.

In the second manufacturing method, various parts for forming the intermediate assembly MA of the cigarettes 1 are supplied onto the long outer roll paper 22P conveyed by the conveyor 110 of the winding machine. Reference numeral 111 is a leak suppression component supply drum that supplies the double length leak suppression member 4W onto the long outer paper roll 22P in the conveying path. The double-length leak suppressing member 4W is cut into two leak suppressing portions 4 by being bisected by a cutting knife at the central position in the longitudinal direction. That is, the double-length leak suppressing member 4W is a member in which the leak suppressing portion 4 is double the length of the normal leak suppressing portion 4 (the length of the leak suppressing portion 4 as the final form incorporated in the cigarette 1). In addition, the leak suppressing portion 4 corresponds to a “first component” that constitutes a part of the mouthpiece portion 3 . The first part may be a component arranged at the front end of the mouthpiece part 3 . A double-length leak suppressing member 4W having a double length of the leak suppressing portion 4 (first component) corresponds to a "double-length first component".

Numerals 112 to 114 are first to third thin rod supply drums that supply double length thin rods 21W1 to 21W3 onto the long outer web 22P conveyed by the conveyor 110. The double-length thinly wound rods 21W1 to 21W3 are separated into two thinly wound rods 21 by being bisected at the center position in the longitudinal direction by a cutting knife. That is, the double-length finely wound rods 21W1 to 21W3 are obtained by making the finely wound rod 21 twice as long as the normal length (the length of the finely wound rod 21 as the final form incorporated into the cigarette 1). In other words, the double-length thin rolled rods 21W1-21W3 are substantially equal to thin rolled rods in which the cut tobacco 24 is wound by the inner wrapping paper 23 having twice the normal length.

As shown in FIG. 9, the leak suppression component supply drum 111 and the first to third thin rod supply drums 112 to 114 are arranged in this order from the upstream side of the conveying path by the conveyor 110 (first position P1 to fourth position P4). The leak suppression component supply drum 111 and the first to third thin rod supply drums 112 to 114 are positioned, for example, above the conveyor 110, and the rotation axis of each drum is perpendicular to the conveying direction of the conveyor 110. Then, the leak suppression part supply drum 111 and the first to third thin rod supply drums 112 to 114 each sucked the parts to be supplied onto the long outer roll paper 22P conveyed by the conveyor 110 to the drum. In this state, the parts to be supplied are sequentially supplied onto the long outer roll paper 22P at a predetermined timing. Various materials are sequentially supplied to the supply drums 111 to 114 via hoppers, intermediate drums and the like (not shown).

As shown in FIG. 9, the leak suppression component supply drum 111 located at the first position P1 supplies the double length leak suppression member 4W onto the long outer paper roll 22P at regular intervals. Here, the distance between the double-length leakage suppressing members 4W supplied onto the long outer paper roll 22P is substantially equal to the length of the double-length thin winding rods 21W1 to 21W3, and the double-length thin winding rods 21W1 to 21W3 are placed thereon. is formed as a rod mounting space S1. Then, the first to third thin rod supply drums 112 to 114 positioned at the second position P2 to the fourth position P4 are placed in the rod mounting space S1 formed between the double length leak suppression members 4W. The length thin winding rods 21W1 to 21W3 are sequentially supplied.

11A and 11B are diagrams for explaining the state in which the leak suppression component supply drum 111 and the thin winding rod supply drums 112 to 114 supply various components at the first position P1 to the fourth position P4. As described above, the double-length leakage suppressing member 4W and the double-length thin winding rods 21W1 to 21W3 are sequentially supplied onto the long outer roll paper 22P conveyed by the conveyor 110. As shown in FIG. Then, at the fourth position P4, the double thin-wound rod 21W3 is supplied to the rod mounting space S1, so that the three double thin-wound rods 21W1 to 21W3 are bundled together, and these bundles form the double-length leakage suppressing member. 4W and arranged in series on the long outer web 22P (see FIGS. 9 and 11, etc.). It should be noted that the term “bundled” here means that the plurality of double-length thin winding rods 21W1 to 21W3 are arranged in parallel and close to each other.

FIG. 12 is a diagram explaining the second half of the long tobacco rod forming process according to the second manufacturing method. In the second half of the long tobacco rod forming process, the double-length leakage suppressing member 4W (double-length first component) and the bundle of the double-length finely wound rods 21W1 to 21W3 (double-length finely wound rods) arranged in series therewith. (indicated by reference numeral 21W in the figure) is integrally wound up by the long outer winding paper 22P. As a result, a bundle of the double-length thin rods 21W1 to 21W3 and the double-length leakage suppressing member 4W are alternately arranged in the longitudinal direction, and these are integrally wound by the long outer winding paper 22P. A tobacco rod 2P' is formed. A section of the long tobacco rod 2P' where the bundle of the double-length thin rods 21W1 to 21W3 is arranged is called a "thin-wound rod section ST1", and a section where the double-length leak suppressing member 4W is arranged. This is called "leak component section ST2".

The winding of the bundle of the double-length thin rods 21W1 to 21W3 and the double-length leak suppressing member 4W using the long outer winding paper 22P is the same as the long tobacco rod forming process according to the first manufacturing method, and A well-known tong (guide member) described in Japanese Patent No. 184625 may be used. As a result, the thin double-length rods 21W1 to 21W3 can be wound up by the long outer winding paper 22P while being compressed from the outside. As a result, the cross section of each of the double-length thin rods 21W1 to 21W3 in the thin rod section ST1 has an elliptical shape, and the hot gas passage extends along the longitudinal direction at the center of the cross section of the thin rod section ST1. is obtained.

Next, the cutting process according to the second manufacturing method will be described. In FIG. 13, illustration of the conveyor 110 is omitted. Reference numeral 115 shown in FIG. 13 is the cutting knife of the hoist. The cutting knife 115 cuts the long tobacco rod 2P' at the lengthwise center position of the double-length leak suppressing member 4W and at the lengthwise center position of each of the double-length thin winding rods 21W1 to 21W3. In other words, in the cutting step, the long tobacco rod 2P' is cut at the central position of each of the narrow rod section ST1 and the leaking part section ST2. As described above, each of the double-length thinly wound rods 21W1 to 21W3 is separated into two thinly wound rods 21 by being cut at the central position in the longitudinal direction. Further, the double-length leak suppressing member 4W is cut at the central position in the longitudinal direction, thereby separating the two leak suppressing portions 4. As shown in FIG. Through the cutting process described above, an intermediate assembly MA (see FIG. 13) can be formed in which the leak suppressing portion 4 is connected to the rear end of the tobacco rod 2 that is a bundle of a plurality of thinly wound rods 21 . In the above example, a single cutting knife 115 is used to cut the long tobacco rod 2P′ in the cutting step, but a plurality of cutting knives 115 are used to cut the long tobacco rod 2P′. You may For example, the first cutting knife and the second cutting knife are arranged at different positions along the conveying direction of the conveyor 110, the first cutting knife is used to cut the thin winding rod section ST1, and the second cutting is performed. A knife may be used to cut the leak component section ST2. Either the first cutting knife or the second cutting knife may be arranged upstream in the conveying direction of the conveyor 110 .

FIG. 13 is a diagram showing the intermediate assembly MA formed in the process of forming the tobacco rod, and the separately prepared flavor source segment 5, filter section 6, and tipping paper 8. FIG. In FIG. 13, the leak suppressing section 4, the flavor source segment 5, the filter section 6, etc. are shown in a simplified form. Here, the flavor source segment 5 and the filter portion 6 correspond to a “second component” forming part of the mouthpiece portion 3 . The flavor source segment 5 and the filter section 6 corresponding to the second part can be said to be the rest of the parts constituting the mouthpiece part 3 excluding the leak suppressing part 4 corresponding to the first part. A second manufacturing method of the cigarette 1 includes a connecting step. In the connecting step according to the second manufacturing method, one or more second parts constituting part of the mouthpiece part 3 are arranged in series with the leak suppression part 4 corresponding to the first part in the intermediate assembly MA. , the intermediate assembly MA and the one or more second parts are wound together by the chipping paper 8 . In the example here, the flavor source segment 5 and the filter portion 6 each correspond to the second part. Therefore, as shown in FIG. 13, the intermediate assembly MA and the flavor source segment are arranged in series in this order at the rear end of the leak suppressing section 4 of the intermediate assembly MA. 5 and the filter part 6 are wound up by the chip paper 8 and integrally connected. As a result, the cigarette 1 is completed as shown in FIG.

In the cigarette 1 configured as described above, when the front end 1b (igniting end) is ignited, the shredded tobacco 24 in each thin rolled rod 21 is burned. Tobacco smoke containing tobacco components generated by burning the cut tobacco 24 is introduced into the mouthpiece portion 3 by flowing inside the inner winding paper 23 of each thinly wound rod 21 . Further, the tobacco rod 2 has a hot gas passage 25 extending from the front end to the rear end of the tobacco rod 2 along the central axis CL. Therefore, the air sucked from the front end side of the hot gas passage 25 is heated by combustion of the shredded tobacco 24 of each finely wound rod 21 arranged around the hot gas passage 25, and becomes high-temperature hot gas. It is led to the mouthpiece portion 3 through the passage 25 .

As described above, the leak suppressing portion 4 is arranged at the front end of the mouthpiece portion 3 , and the air passage 41 of the leak suppressing portion 4 faces the hot gas passage 25 and each narrow rod 21 in the tobacco rod 2 . are arranged as follows. Therefore, the hot gas from the hot gas passage 25 and the tobacco smoke from the thinly wound rods 21 are smoothly supplied to the later flavor source segment 5 (thermally activated flavor source 50) side through the air passage 41 of the leak suppressing portion 4. can. Here, when the hot gas is introduced into the thermally activated flavor source 50 of the flavor source segment 5, the thermal energy of the hot gas activates the thermally activated flavor source 50, releasing the flavor component from the thermally activated flavor source 50. be. Specifically, the heat-dissolvable capsules in heat-activated flavor source 50 dissolve. As a result, the flavor components such as perfume contained in the capsules are released, and the smoke flowing from each thinly wound rod 21 can be flavored. In particular, when heat-dissolving capsules enclosing flavor components such as fragrances are arranged as the heat-activated flavor sources 50 of the flavor source segments 5 on the center side of the cross section of the flavor source segments 5, the cross section of the leak suppressing portion 4 The hot gas can be made to impinge on the capsule through the air passage 41 formed in the central portion. According to this, heat energy can be efficiently applied to the heat-dissolving capsule, and the heat-activatable flavor source 50 can be efficiently activated.

Next, the action of the blocking portion 43 (blocking surface 42) in the leak suppressing portion 4 will be described. FIG. 15 is a schematic diagram showing the state of the cigarette 1 during smoking. That is, in the state shown in FIG. 15, a tapered combustion cone TC is formed on the tip side of the tobacco rod 2 as the tobacco rod 2 burns. The combustion cone TC formed during smoking covers the front end of the hot gas passage 25 located on the central side of the cross section of the tobacco rod 2, but sometimes covers the outer peripheral side gap 26 located on the outer peripheral side of the cross section of the tobacco rod 2. may not be sufficiently covered by the combustion cone TC. In such a case, if the hot gas is allowed to freely pass through the outer gap 26, the outer circumference of the tobacco rod 2 will burn ahead of the center, resulting in uneven combustion. There is fear. Further, only the outer roll paper 22 is arranged on the outer peripheral side of the outer peripheral side gap portion 26 . Therefore, if the hot gas is allowed to freely pass through the outer peripheral gap 26, the heat of the hot gas is directly transmitted to the outer paper roll 22, and the temperature of the outer paper roll 22 may rise excessively. be.

On the other hand, according to the cigarette 1 of the present embodiment, the closing portion 43 (closure surface 42) of the leak suppressing portion 4 is closed so as to close the rear end of the outer peripheral gap portion 26 of the tobacco rod 2 as described above. are arranged opposite each other. Therefore, it is possible to reduce or suppress the ventilation (leakage) of hot gas through the outer peripheral side gap 26 of the tobacco rod 2 . As a result, when smoking the cigarette 1, it is possible to suppress uneven combustion in which the outer peripheral side of the tobacco rod 2 burns before the central side of the tobacco rod 2, and to prevent the temperature of the distribution outer winding paper 22 from becoming excessively high. can be suppressed.

Of course, the air passage 41 in the leak suppressing portion 4 does not necessarily have to have a circular cross section, and may have various shapes. FIG. 16 is a front view of the leak suppressing portion 4 according to the modification as seen from the blocking surface 42 side. As in FIG. 3B, the dashed line indicates the cross-sectional outline of each thin winding rod 21, that is, the position of the outer surface 23A on the inner paper roll 23. As shown in FIG. In the embodiment shown in FIG. 16, the air passage 41 includes passages 41A to 41C for tobacco smoke arranged opposite to the rear ends of the respective thin rods 21, and hot gas passages 41A to 41C arranged opposite to the rear ends of the hot gas passages 25. It has a flow path 41D for use, and the other part serves as a closed part 43. As shown in FIG. According to this aspect, the tobacco smoke from each thin-wound rod 21 can be individually circulated through each of the tobacco smoke passages 41A to 41C. Also, the hot gas from the hot gas passage 25 can be individually circulated through the hot gas passage 41D.

Furthermore, according to the tobacco rod 2 of the present embodiment, the plurality of thinly wound rods 21 obtained by winding the cut tobacco pieces 24 with the inner winding paper 23 are further bundled together with the outer winding paper 22, and the inner winding paper 23 of each thin rod 21 is bundled together. A configuration is adopted in which the hot gas passage 25 is defined (demarcated) by the outer surface 23A. That is, instead of inserting a hollow tube into the tobacco rod 2 as in the conventional case, the outer surface 23A of the inner winding paper 23 of each thin rod 21 can form the peripheral wall of the hot gas passage 25. FIG. According to this, the outer surfaces 23A of the inner winding papers 23 of the respective thin rods 21 can be utilized simply by bundling together the plurality of thin rods 21 each having the cut tobacco 24 wound by the inner winding paper 23 further by the outer winding paper 22. A hot gas passage 25 extending along the axial direction of the tobacco rod 2 can be formed. Therefore, the manufacturing suitability of the tobacco rod 2 in which the hot gas passage 25 is extended can be improved, and the tobacco rod 2 having the hot gas passage 25 can be provided more easily than conventionally.

In addition, according to the cigarette 1 of the present embodiment, the shredded tobacco 24 of each thinly wound rod 21 arranged around the hot gas passage 25 is individually wound by the inner winding paper 23, so that each thinly wound rod 21 It is possible to prevent the shredded tobacco 24 from falling from the front end 1b side. Further, according to the tobacco rod 2 according to the present embodiment, since the cut tobacco 24 of each thin rod 21 is individually wound by the inner winding paper 23, the filling amount of the cut tobacco 24 in each thin rod 21 is At least, the hardness of the tobacco rod 2 as a whole can be appropriately ensured, and excellent aptitude for manufacturing using a hoisting machine is provided.

It should be noted that the plurality of thinly wound rods 21 included in the tobacco rod 2 may have the same type of shredded tobacco 24, or may be different from each other. Among the plurality of thinly wound rods 21 included in the tobacco rod 2, at least one of the thinly wound rods 21 and the other thinly wound rods 21 have different types of shredded tobacco 24, thereby increasing the degree of freedom in flavor and taste design. It becomes easy to realize a rich flavor and taste. Further, when the types of shredded tobacco 24 included in the plurality of thinly wound rods 21 of the tobacco rod 2 are different as described above, the thinly wound rods 21 may have different cross-sectional areas. According to this, the compounding amount of the cut tobacco 24 can be easily controlled according to the type of the cut tobacco 24 .

Here, each thin rod 21 in the tobacco rod 2 is covered with the inner winding paper 23 on the outer peripheral side of the cut tobacco 24 . Therefore, the tobacco smoke containing the tobacco components released from the shredded tobacco 24 of each thinly wound rod 21 is introduced into the mouthpiece portion 3 without much mixing with each other. According to this, when the plurality of thinly wound rods 21 contain different types of cut tobacco 24, the flavor of the tobacco components contained in the smoke emitted from the different types of cut tobacco 24 can be made more conspicuous. The effect of being able to

Also, in the tobacco rod 2 of this embodiment, a plurality of thinly wound rods 21 are arranged around the hot gas passage 25 . According to this, it is possible to arrange the hot gas passage 25 in the central region of the cross section of the tobacco rod 2 and effectively utilize the peripheral region as the arrangement region of the thin winding rod 21 . As described above, high-temperature hot gas flows through the hot gas passage 25 of the tobacco rod 2, and the narrow rod 21 is arranged around the hot gas passage 25 in the cross section of the tobacco rod 2. Therefore, the heat of the hot gas flowing through the hot gas passage 25 can be prevented from being excessively transferred to the outer paper roll 22 .

Furthermore, each thin rod 21 in the tobacco rod 2 has an elliptical cross section, and the short axis direction is arranged along the radial direction of the tobacco rod 2 . By orienting the minor axis direction of each thin rolled rod 21 having an elliptical cross section along the radial direction of the tobacco rod 2, a region for forming the hot gas passage 25 is secured in the cross section central region of the tobacco rod 2. becomes easier.

<Embodiment 2>
Next, a tobacco rod 2 according to Embodiment 2 will be described. FIG. 17 is a cross-sectional view of the tobacco rod 2 according to Embodiment 2. FIG. As shown in FIG. 17, the tobacco rod 2 has two narrow rods 21. As shown in FIG. The tobacco rod 2 having two thin rods 21 (three thin rolls type) has the same basic structure as the tobacco rod 2 having three thin rods 21 (three thin rolls type) described above. be. In other words, the thin two-roll type tobacco rod 2 has a hot gas passage 25 formed in the central portion of its cross section, and two thin rolled rods 21 are arranged so as to surround the hot gas passage 25. .

In FIG. 17, the same reference numerals are assigned to the configurations common to the above-described embodiments, and detailed description thereof will be omitted. The hot gas passage 25 differs from the embodiment shown in FIG. 2 in that its cross-sectional shape is circular, but the shape of the hot gas passage 25 is not particularly limited. In the example shown in FIG. 17, the pair of thinly wound rods 21 has a cross section in which a substantially semicircular notch is provided in a part of an elliptical shape. As shown in FIG. 17, the pair of thin winding rods 21 are arranged such that the semi-circular notches are opposed to each other on the central axis CL side of the tobacco rod 2, and the long axis directions thereof are parallel to each other. are placed in A hot gas passage 25 having a circular cross section is formed by combining the semicircular notches of the pair of thinly wound rods 21 . As shown in FIG. 17, the short axis directions of the pair of thin winding rods 21 are both arranged along the radial direction of the tobacco rod 2. located on the same straight line.

The cigarette rod 2 of the two thin roll type shown in FIG. 17 is also integrally connected to the mouthpiece portion 3 via the tipping paper 8 described above, thereby forming the cigarette 1 (see FIG. 2). The two thin rolls type tobacco rod 2 can be basically manufactured by the same process as the three thin rolls type tobacco rod 2 . Of course, the thin two-roll type is different from the three thin-rolled rod type in that the number of the thin rolled rods 21 is two. , the long thin winding rods 21P1 and 21P2 are provided. Assuming that the diameter of the tobacco rod 2 to be produced is 7 mm, the diameters (before compression) of the two long thin rolled rods 21P1 and 21P2 may be set to about 4 mm to 4.5 mm.

In this embodiment, when the two long thin winding rods 21P1 and 21P2 are merged in the thick winding forming section 102 of the hoist, a mandrel is called between the two long thin winding rods 21P1 and 21P2. A core rod member is interposed. The mandrel has a cross-section corresponding to the hot gas channel 25 and is formed as a cylindrical rod in this embodiment. In the thick winding forming section 102, the mandrel is sandwiched between the two long thin winding rods 21P1 and 21P2 and passed through the inside of the guide member. As a result, the two long thin roll rods 21P1 and 21P2 are compressed from the inside and outside by the inner wall surface of the cylindrical guide of the guide member and the mandrel, and the long outer roll paper 22P is formed into a cylindrical shape, which can be rolled up integrally. . At that time, the cross section of the two long thin rods 21P1 and 21P2 becomes an elliptical shape partially having approximately semicircular concave portions 25P1 and 25P2 as shown in FIG. 18 due to the compression during the molding. . The pair of recesses 25P1 and 25P2 form the hot gas passage 25 of the tobacco rod 2 by being combined. Reference M shown in FIG. 18 indicates a cross section of a mandrel (core rod member). By forming recesses 25P1 and 25P2 in advance in the long thin winding rods 21P1 and 21P2 using the mandrel (core rod member) in the manufacturing process of the tobacco rod 2, hot gas is generated in the central portion of the cross section of the tobacco rod 2. Passage 25 can be easily formed. Incidentally, the mandrel M may be used as a core rod member for forming the hot gas passage 25 when manufacturing the above-described three-roll type tobacco rod 2 .

In the present embodiment described above, the ratio of the cross-sectional area of the hot gas passage 25 to the cross-sectional area of the tobacco rod 2 is not particularly limited, but is preferably 5% or more. Thereby, a sufficient amount of hot gas can be supplied to the thermally activated flavor source 50 (flavor source segment 5 ) of the mouthpiece portion 3 through the gas passage 25 of the tobacco rod 2 .

Moreover, as described above, the number of thinly wound rods 21 included in the tobacco rod 2 is not particularly limited as long as it is two or more. , it is preferable to set the number of thin winding rods 21 to three. The number of thin winding rods 21 may be changed along the axial direction of the tobacco rod 2 . For example, three thin winding rods 21 may be arranged on the front end side of the tobacco rod 2 and two thin winding rods 21 may be arranged on the rear end side of the tobacco rod 2 .

In this embodiment, the inner winding paper 23 used for the thin winding rod 21 preferably uses a material with high heat transfer performance in order to efficiently transfer heat to the shredded tobacco 24 . Therefore, it is preferable to use a material having a low basis weight and a high density for the inner paper roll 23 . For example, it is preferable to set the basis weight of the inner paper roll 23 to 10 gsm or more and 40 gsm or less and the density of the inner paper roll 23 to 1 g/cm ³ or more and 1.5 g/cm ^{3 or} less. In addition, the inner winding paper 23 may be coated with a coating agent such as pectin or sodium alginate in order to improve its heat transfer performance.

In addition, it is preferable to use a material with low air permeability for the inner paper roll 23 from the viewpoint of reducing ventilation from the inside of each thin roll 21 to the outer peripheral side gap 26 . For example, there is a mode in which the air permeability of the inner paper roll 23 is set to 0 Coresta unit (CU) or more and 200 Coresta unit (CU) or less.

Further, the outer wrapping paper 22 of the tobacco rod 2 is preferably made of wrapping paper with low heat transfer performance from the viewpoint of suppressing the escape of heat to the outside. Therefore, the outer web 22 is preferably made of a low basis weight and low density material. For example, it is preferable to set the basis weight of the outer roll paper 22 to 10 gsm or more and 40 gsm or less, and the density of the outer roll paper 22 to be 0.5 g/cm ³ or more and 1 g/cm ^{3 or} less. Also, the outer paper roll 22 may be coated with a coating agent such as calcium carbonate or silicon dioxide to reduce heat transfer.

In addition, it is preferable that the plurality of thin rolled rods 21 in the tobacco rod 2 have a hardness of 60% or more and 85% or less when the inside of the inner winding paper 23 is filled with the shredded tobacco 24 . As used herein, the term "hardness" refers to the resistance of the thin wound rod 21 to deformation in the cross-sectional direction. The hardness of the finely wound rod 21 can be measured, for example, based on the test method described in Japanese Patent Publication No. 2019-506868 (paragraph 0029-0031, FIG. 1). A test for measuring the hardness of the thin wound rod 21 can also be performed using the standard operating procedure of a Borgwaldt Hardness Tester H10 (manufactured by Heinr Borgwaldt GmbH).
That is, the hardness of the finely wound rod 21 is obtained by the following formula.
Hardness (%) = (Dd/Ds) x 100
where Ds is the diametrical height of the finely wound rod 21 before being loaded by the Borgwaldt Hardness Tester H10, and Dd is the diametrical height of the finely wound rod 21 before being loaded by the Borgwaldt Hardness Tester H10 over a predetermined loading time (5 seconds). It is the height in the radial direction after a constant load (88 g) is applied to the thin winding rod 21 from the radial direction. 19A and 19B are diagrams for explaining an overview of hardness measurement of the finely wound rod 21. FIG. The symbol F shown in FIG. 19 indicates the applied load applied to the finely wound rod 21 from the diameter direction during the measurement test. The symbol d is the amount of depression of the thin rod 21 in the diametrical direction due to the load applied by the load bar (d=Ds-Dd). It should be noted that the hardness approaches 100% as the finely wound rod 21 is harder (the amount of depression is smaller).

Although the embodiment according to the present invention has been described above, the cigarette according to the present invention and the manufacturing method thereof are not limited to these. Also, each aspect disclosed in the embodiments and modifications described above can be combined with any other aspect disclosed in this specification.

Reference Signs List 1 Cigarette 2 Tobacco rod 3 Filter 21 Thin rod 22 Outer winding paper 23 Inner winding paper 24 Cut tobacco 25 Hot gas passage

Claims (8)

a tobacco rod and
a mouthpiece connected to the rear end of the tobacco rod via tipping paper;
with
the mouthpiece portion has a heat-activated flavor source that releases flavor components when activated by thermal energy;
The tobacco rod has a plurality of thinly wound rods and an outer winding paper for bundling and winding the plurality of thinly wound rods,
Each of the plurality of thinly wound rods has an inner winding paper and tobacco shreds filled inside the inner winding paper,
At the central portion of the cross section of the tobacco rod, a hot gas passage for guiding hot gas generated at the ignition end side to the thermally activated flavor source extends along the axial direction from the front end to the rear end of the tobacco rod. has been extended,
the hot gas path is defined by an outer surface of the inner web of the plurality of thin rods;
cigarette. The cigarette according to claim 1, wherein the plurality of thinly wound rods are arranged around the hot gas passage in the cross section of the tobacco rod. The cigarette according to claim 1 or 2, wherein the inner winding paper of the plurality of narrow rods is adhered to the outer winding paper. The cigarette according to any one of claims 1 to 3, wherein the plurality of thinly wound rods have an elliptical cross section, and the minor axis direction thereof is arranged along the radial direction of the tobacco rod. A leak suppressing portion connected to the rear end of the tobacco rod, wherein an air passage for circulating tobacco smoke generated in the plurality of thinly wound rods extends in the axial direction, and the adjacent thinly wound rod A leak suppression part having a closing part that closes the rear end of the gap formed between the mouthpiece parts is arranged at the front end part of the mouthpiece part,
5. A cigarette according to any one of claims 1-4. a tobacco rod; and a mouthpiece portion connected to the rear end of the tobacco rod via tipping paper, the mouthpiece portion having a thermally activated flavor source that emits flavor components when activated by thermal energy. A method for manufacturing a cigarette comprising
By bundling a plurality of finely wound rods obtained by winding shredded tobacco with the inner winding paper and integrally winding them with the outer winding paper, the hot gas passage defined by the outer surface of the inner winding paper in each thin rod extends in the axial direction. forming a tobacco rod extending centrally in the cross-section along
a connecting step of arranging the mouthpiece part in series with the tobacco rod and winding them integrally with tipping paper;
A method of manufacturing a cigarette, comprising: The step of forming the tobacco rod includes:
A step of forming a long thin rolled rod in which a plurality of long thin rolled rods are formed in parallel in the conveying direction of the hoisting machine by continuously winding the shredded tobacco in the long sheet-like thin roll paper in the longitudinal direction. and,
a long tobacco rod forming step of forming a long tobacco rod by winding together the plurality of long thin rolled rods by a long outer winding paper while joining the plurality of long thin rolled rods;
a cutting step of forming the tobacco rod by cutting the long tobacco rod into a predetermined length;
The method for manufacturing a cigarette according to claim 6, comprising: The step of forming the tobacco rod includes:
A double-length first part having a length twice as long as the first part constituting a part of the mouthpiece part is placed at a predetermined interval on the long sheet-like long outer roll paper that is conveyed along the conveying path of the winder. After supplying a plurality of double-length thin rods having a length twice as long as the thin rod in a rod mounting space formed between the double-length first parts so as to be bundled. a long tobacco rod forming step of forming a long tobacco rod by integrally winding the double length first component and the bundle of the double length thin rods arranged in series with the long outer winding paper;
The first component is connected to the tobacco rod by cutting the long tobacco rod at the lengthwise center position of the double-length first component and at the lengthwise center position of the double-length thin roll rod, respectively. and a cutting step to form a cut intermediate assembly;
In the connecting step, the intermediate assembly and the one or more components are arranged in series with one or more second components that constitute a part of the mouthpiece portion. 7. The method of manufacturing a cigarette according to claim 6, wherein the second part is integrally wound with tipping paper.

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