Perforating drum device and perforation device

Abstract

This perforating drum is provided with a rotating drum which has a holding part that holds a heated-type tobacco product, a perforation unit which perforates the tobacco rod, and a cam which is provided on a rotating drum base part provided on the rotating drum. The perforation unit comprises a slide rod which is provided on the rotating drum, a perforating slider which has a perforation needle arranged opposite of the tip surface of the tobacco rod and which is slidably held on the slide rod, and a cam follower which is provided on the perforation slider and engages with the cam, and which allows the perforation slider to slide along the slide rod, wherein the cam has an insertion section and a withdrawal section.

1 . A perforating drum device for forming a hollow part in a tobacco rod of a heated cigarette, comprising:
 a rotating drum part having, on an outer circumferential surface thereof, a holding part that holds the heated cigarette so that an axial direction of the tobacco rod extends along a drum rotary axis;   a perforating unit that is provided on the rotating drum part and perforates a front end of the tobacco rod of the heated cigarette held in the holding part in a process of transporting the heated cigarette; and   a cam part that is provided on a rotating drum base part that is an unmoving fixed member provided beside the rotating drum part,   wherein   the perforating unit has a slide rod that circles in synchronization with the rotating drum part and extends parallel with the drum rotary axis, a perforating slider that has a perforating needle part disposed on an outer circumferential side relative to the rotating drum part and is held by the slide rod so as to be slidable back and forth along an axial direction of the slide rod, and a cam follower that is provided on the perforating slider, is engaged with the cam part, and circles in accordance with rotation of the rotating drum part while being guided by the cam part, so that the perforating slider slides back and forth along the axial direction of the slide rod,   the cam part includes at least an insertion section that guides the cam follower so that the perforating needle part is inserted into the tobacco rod from the front end and an extraction section that guides the cam follower so that the perforating needle part is extracted from the tobacco rod,   the perforating slider has a slider body slidably attached to the slide rod and a needle shaft part that is rotatably held by the slider body and has the perforating needle part attached to a front end side thereof;   the needle shaft part and the perforating needle part are disposed coaxially with each other and are rotatable about a rotary axis parallel with the drum rotary axis; and   the rotating drum base part has a guide member having a guide surface that extends in an arc shape about the drum rotary axis and along which a predetermined contact part of the needle shaft part slides to rotate the needle shaft part during a period where the cam follower of the perforating slider that circles in accordance with rotation of the rotating drum part is displaced in at least a part of the insertion section, and   the contact part is an annular roller part that is coaxial and integral with the needle shaft part, and the needle shaft part rotates due to friction generated when the roller part of the needle shaft part in the perforating slider that circles slides along the guide member.   
     
     
         2 . The perforating drum device according to  claim 1 , wherein
 the cam part has a guide rail that extends in an arc shape about the drum rotary axis and accommodates the cam follower.   
     
     
         3 . The perforating drum device according to  claim 2 , wherein
 the guide rail is disposed in an annular manner about the drum rotary axis.   
     
     
         4 . The perforating drum device according to  claim 2 , wherein
 the guide rail has a three-dimensional curved shape equally distanced from the drum rotary axis and has an inclined guide part that is at least partially inclined with respect to a virtual orthogonal surface orthogonal to the drum rotary axis; and   the insertion section and the extraction section are formed by the inclined guide part.   
     
     
         5 . The perforating drum device according to  claim 4 , wherein
 the inclined guide part includes at least one of a constant-speed slide region where an inclination angle with respect to the virtual orthogonal surface is constant and a variable-speed slide region where the inclination angle with respect to the virtual orthogonal surface is not constant.   
     
     
         6 . The perforating drum device according to  claim 4 , wherein
 an inclination angle of the extraction section with respect to the virtual orthogonal surface is smaller than an inclination angle of the insertion section with respect to the virtual orthogonal surface.   
     
     
         7 . The perforating drum device according to  claim 2 , wherein
 the rotating drum base part has a cylindrical housing that is coaxial with the drum rotary axis, and the guide rail is provided along an outer circumferential surface of the cylindrical housing.   
     
     
         8 . The perforating drum device according to  claim 1 , wherein
 the cam part is configured such that the extraction section is longer than the insertion section.   
     
     
         9 . The perforating dram device according to  claim 1 , wherein
 the cam part is disposed in an annular manner about the drum rotary axis and is configured such that a second central angle φ 2  formed between a directional vector of a third virtual perpendicular line extending from a start position of the extraction section toward the drum rotary axis and a directional vector of a fourth virtual perpendicular line extending from an end position of the extraction section toward the drum rotary axis is larger than a first central angle φ 1  formed between a directional vector of a first virtual perpendicular line extending from a start position of the insertion section toward the drum rotary axis and a directional vector of a second virtual perpendicular line extending from an end position of the insertion section toward the drum rotary axis.   
     
     
         10 . The perforating drum device according to  claim 1 , wherein
 the cam part is disposed in an annular manner about the drum rotary axis and is configured such that a first central angle φ 1  formed between a directional vector of a first virtual perpendicular line extending from a start position of the insertion section toward the drum rotary axis and a directional vector of a second virtual perpendicular line extending from an end position of the insertion section toward the drum rotary axis is 10° or more and 120° or less.   
     
     
         11 . The perforating drum device according to  claim 1 , wherein
 the cam part is disposed in an annular manner about the drum rotary axis and is configured such that a second central angle φ 2  formed between a directional vector of a third virtual perpendicular line extending from a start position of the extraction section toward the drum rotary axis and a directional vector of a fourth virtual perpendicular line extending from an end position or the extraction section toward the drum rotary axis is 10° or more and 180° or less.   
     
     
         12 . The perforating drum device according to  claim 1 , wherein
 the cam part includes, between the insertion section and the extraction section, an insertion state constant position section that guides the cam follower so that the perforating needle part is kept inserted into the tobacco rod by keeping the perforating slider at a constant position relative to the slide rod.   
     
     
         13 . The perforating drum device according to  claim 1 , wherein
 a diameter of the perforating needle part is 3.5 mm or less.   
     
     
         14 . The perforating drum device according to  claim 1 , wherein
 the guide member is configured to make contact with the contact part during a period where the cam follower of the perforating slider that circles in accordance with rotation of the rotating drum part is displaced in at least a part of the extraction section.   
     
     
         15 . The perforating drum device according to  claim 1 , wherein
 the guide member is divided into a plurality of divided guide parts, and the plurality of divided guide parts are separated away from one another.   
     
     
         16 . The perforating drum device according to  claim 1 , wherein
 the holding part is a holding groove having a recessed shape that is capable of holding the heated cigarette; and   a needle axis of the perforating needle part passes a point that is located on a straight line passing an intersection of a virtual perpendicular line extending from a groove bottom center of the holding groove toward the drum rotary axis and the drum rotary axis and passing the groove bottom center and is located outside the groove bottom center and extends parallel with the drum rotary axis.   
     
     
         17 . The perforating drum device according to  claim 18 , wherein
 a distance between the groove bottom center of the holding groove and the needle axis of the perforating needle part is set equal to or less than a diameter of the tobacco rod of the heated cigarette held in the holding groove.   
     
     
         18 . The perforating drum device according to  claim 1 , wherein
 the rotating drum part has a first stopper member that makes contact with an inhalation end of the heated cigarette so that the heated cigarette becomes less likely to drop off from the holding part when the perforating needle part is inserted into the front end of the tobacco rod.   
     
     
         19 . The perforating drum device according to  claim 1 , wherein
 the rotating drum part has a second stopper member that makes contact with the front end of the tobacco rod so that the heated cigarette becomes less likely to drop off from the holding part when the perforating needle part is extracted from the tobacco rod.   
     
     
         20 . A perforation device comprising a plurality of perforating drum devices,
 wherein   each of the perforating drum devices is a perforating drum device for forming a hollow part in a tobacco rod of a heated cigarette and includes a rotating drum part having, on an outer circumferential surface thereof, a holding part that holds the heated cigarette so that an axial direction of the tobacco rod extends along a drum rotary axis, a perforating unit that is provided on the rotating drum part and perforates a front end of the tobacco rod of the heated cigarette held in the holding part in a process of transporting the heated cigarette, and a cam part that is provided on a rotating drum base part provided beside the rotating drum part,   the perforating unit has a slide rod that circles in synchronization with the rotating drum part and extends parallel with the drum rotary axis, a perforating slider that has a perforating needle part disposed on an outer circumferential side relative to the rotating drum part and is held by the slide rod so as to be slidable back and forth along an axial direction of the slide rod, and a cam follower that is provided on the perforating slider, is engaged with the cam part, and circles in accordance with rotation of the rotating drum part while being guided by the cam part, so that the perforating slider slides back and forth along the axial direction of the slide rod,   the cam part includes at least an insertion section that guides the cam follower so that the perforating needle part is inserted into the tobacco rod from the front end and an extraction section that guides the cam follower so that the perforating needle part is extracted from the tobacco rod,   a needle diameter of the perforating needle part provided in a perforating drum device that is located in a relatively later stage is larger than a needle diameter of the perforating needle part provided in a perforating drum device that is located in a relatively former stage among the plurality of perforating drum devices.   
     
     
         21 . A perforation device comprising a plurality of perforating drum devices,
 wherein   each of the perforating drum devices is a perforating drum device for forming a hollow part in a tobacco rod of a heated cigarette and includes a rotating drum part having, on an outer circumferential surface thereof, a holding part that holds the heated cigarette so that an axial direction of the tobacco rod extends along a drum rotary axis, a perforating unit that is provided on the rotating drum part and perforates a front end of the tobacco rod of the heated cigarette held in the holding part in a process of transporting the heated cigarette, and a cam part that is provided on a rotating drum base part provided beside the rotating drum part,   the perforating unit has a slide rod that circles in synchronization with the rotating drum part and extends parallel with the drum rotary axis, a perforating slider that has a perforating needle part disposed on an outer circumferential side relative to the rotating drum part and is held by the slide rod so as to be slidable back and forth along an axial direction of the slide rod, and a cam follower that is provided on the perforating slider, is engaged with the cam part, and circles in accordance with rotation of the rotating drum part while being guided by the cam part, so that the perforating slider glides back and forth along the axial direction of the slide rod,   the cam part includes at least an insertion section that guides the cam follower so that the perforating needle part is inserted into the tobacco rod from the front end and an extraction section that guides the cam follower so that the perforating needle part is extracted from the tobacco rod,   a needle insertion depth dimension of the perforating needle part provided in a perforating drum device that is located in a relatively later stage is larger than a needle insertion depth dimension of the perforating needle part provided in a perforating drum device that is located in a relatively former stage among the plurality of perforating drum devices.