JP3151300B2 - Mechanism for detecting the burning position of cigarette winding in an automatic smoking machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic smoking machine for automatically smoking cigarettes or other cigarette rolls and automatically analyzing the components contained in the smoke. The present invention relates to a combustion position detection mechanism that detects that a winding has burned to a predetermined position.

[0002]

2. Description of the Related Art When manufacturing and selling cigarettes such as cigarettes, components such as nicotine and tar contained in smoke when smoking the cigarette are analyzed to determine the content and the like. Must be displayed.

[0003] The tobacco leaves of this cigarette roll such as cigarettes are agricultural products, and their properties are not exactly constant. When producing the above cigarette rolls, the cigarette is produced at a predetermined ratio in accordance with the number of cigarettes manufactured. A number of samples are taken out, the samples are smoked by a smoking machine, and the components contained in the smoke are analyzed. Therefore, as the number of manufactured cigarette turns increases, the number of turns to be analyzed also increases.

[0004] The smoking machine is provided with a plurality of smoking ports, and a cigarette or other cigarette winding is attached to these smoking ports via a holder. Then, while igniting the mounted winding, the smoking machine inhales air through the tobacco winding in a predetermined pattern. A Cambridge filter is provided inside the holder to collect components such as tar. Further, other components of the smoke inhaled into the smoking machine are analyzed by the analyzer.

Heretofore, mounting of a cigarette or a holder, ignition, fire extinguishing, elimination of butts, etc. on the smoking machine have all been performed manually by an inspector. Therefore, when the number of windings to be inspected increases as described above, these simple operations must be repeated for a long time, and the burden on the inspector increases.

In order to solve such a problem, an attempt has been made to develop a device for automatically mounting the above-mentioned winding, igniting, extinguishing, and removing butts by a robot. By the way, in the inspection as described above, after the cigarette is burned for a predetermined length, the burning portion at the tip of the tobacco is cut,
It is specified that the smoke in the rest of the cigarette is also suctioned and analyzed. Therefore, in order to automatically inspect such a cigarette winding, it is necessary to accurately detect that the combustion of the cigarette winding has advanced to a predetermined position.

[0007] The position of the burning portion of such a cigarette winding is
It can be detected by detecting infrared rays emitted from the combustion part. However, such infrared rays are radiated from the combustion section in all directions, and are reflected on the surface of each member. Therefore, it is necessary to protrude a hood or the like that regulates the detection direction of the infrared rays so that the infrared rays are detected only when the combustion section has advanced to a predetermined position.

Therefore, the detection head for detecting the infrared rays is grounded at a position corresponding to the expected combustion stop position on the side of the tobacco winding, and the hood is projected from the detection head toward the side surface of the tobacco winding. Need to be set up. But,
If such a detection head is disposed near the cigarette winding, there is a possibility that the detection head may interfere with a mechanism for attaching / detaching the cigarette winding, cutting the combustion section, and the like. In order to prevent such interference, it is necessary to dispose the detection head at a certain distance from the tobacco winding. However, in such a case, the accuracy of detecting the combustion position and the reliability are reduced.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been developed for use in an automatic smoking machine for automatically mounting, igniting, extinguishing, and removing a cigarette butt. It is an object of the present invention to provide a combustion position detecting mechanism for a cigarette winding which can accurately measure the combustion position of the cigarette winding and which does not interfere with a mechanism for attaching / detaching the cigarette winding or a mechanism for cutting a burning section.

[0010]

According to the present invention, there is provided a combustion position detecting mechanism comprising: a detecting head which is positioned corresponding to a position for stopping the burning of a cigarette; an infrared sensor provided in the detecting head; A hood protruding from the detection head and pointing to the side of the cigarette winding,
Further, a head moving mechanism is provided for moving the detection head forward and backward along the axial direction of the cigarette winding and rotating the detection head around the axis in the forward and backward direction.

[0011]

When detecting the combustion position, the detection head is positioned to the position corresponding to the combustion stop position of the cigarette winding and is rotated so that the hood is directed to the side surface of the cigarette winding and the position of the burning position is determined. After the detection is completed, the hood turns and the hood turns substantially in the horizontal direction. If no detection is performed, there is no possibility of interference with other mechanisms. Then, since the detection head advances only when performing detection, the detection head is positioned near the cigarette winding,
In addition, the hood can be directed to the tobacco winding, and the detection accuracy of the combustion position is improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show the entirety of the automatic smoking machine of the present invention. FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a side view. In the figure, reference numeral 1 denotes a smoking machine main body.
The front plate 5 has a plurality of smoking ports 2 protruding therefrom. A holder 3 is attached to each of the smoking openings 2, and a cigarette roll 4 such as a cigarette is attached via the holder 3.

A smoking mechanism 11 as shown in FIG. 4 is provided in the interior of the smoking machine main body 1 so as to correspond to each of the above-mentioned smoking ports 2. This smoking mechanism 11 includes:
A cylinder mechanism 13 is provided. The cylinder mechanism 13 is connected to the smoking port 2 and the smoke collecting bag 1 through a three-way valve 12.
5 is connected. And, this cylinder mechanism 13
The reciprocating drive is performed at a predetermined cycle by the drive mechanism 14, and the three-way valve 12 is switched in response to the operation of the cylinder mechanism 13. Air is intermittently sucked through the cigarette roll 4 attached to the smoking port 2 via the holder 3, and the sucked gas is sent to the collection bag 15 via the three-way valve 12.

The collection bag 15 is connected to a suction pump 17 via a two-way valve 16, and the smoke sent into the collection bag 15 is sucked by the suction pump 17. Further, a gas analyzer 18 is provided at an exhaust port of the suction pump 17.
Is connected.

A Cambridge filter is built in the holder 3, and tar in the smoke from the winding 4 is collected by the Cambridge filter. The other components in the smoke are analyzed by the gas analyzer 18 described above.

Further, a moving mechanism 21 is provided in front of the smoking machine main body 1, and the moving mechanism 21 has a rail 22. The rail 22 is parallel to the front surface of the smoking machine main body 1. Are located in A movable table 23 is provided on the rail 22, and the movable table 23 is configured to move to an arbitrary position along the rail 22. The movable table 23 is provided with a winding table 24 on which the cigarette roll 4 to be inspected is mounted and a holder mounting table 25 on which the holder 3 is mounted.

A robot 31 is attached to the moving table 23 as a winding automatic attaching / detaching device. The robot 31 is a general-purpose arm-type robot that is commercially available, and includes an articulated arm 32. And
A working hand 33 is attached to the tip of the arm 32. The work hand 33 is attached to the arm 32 via a shaft 34, and the work hand 33 is rotatable around the shaft 34. It is rotatable.

The work hand 33 selectively includes a gripping mechanism 35 for gripping the cigarette winding, a cutting mechanism 36 for cutting the burning portion at the tip of the holder 3 and the cigarette winding disposed at another position. , And an ignition mechanism 37 for igniting the winding are protruded. Each of these mechanisms is provided so as to protrude in a direction orthogonal to each other. In order to perform corresponding operations, the work hand 33 rotates around the axis 24, and the shaft 34 is attached to the arm 32. The mechanism to be rotated is configured to be opposed to the front surface of the smoking machine main body 1.

Therefore, when mounting the winding, first, the robot 31 is operated, the holder on the holder mounting table 25 is gripped by the gripping mechanism 35 'and mounted on the corresponding smoking port 2, and Next, the winding on the winding table 24 is gripped by the gripping mechanism 35 and mounted on the holder.

Next, the mounted winding is ignited by the ignition mechanism 37, and smoking is performed in a predetermined mode by the smoking mechanism 11 in the smoking machine main body 1, and gas is analyzed.

A combustion position detecting mechanism 41 is provided near each of the smoking ports 2. These combustion position detection mechanisms 41 are provided with infrared sensors, and detect infrared rays emitted from the combustion part of the winding. Therefore, when the burning of the cigarette winding proceeds to a predetermined position, the infrared sensor detects infrared rays radiated from the burning portion, thereby detecting that the winding has been burned to the predetermined position.

When it is detected that the winding has been burned to a predetermined position, the robot 31 operates,
The gripping mechanism 35 ′ of the working hand 33 grips the cutting mechanism 36, and the cutting mechanism 36 cuts off the burned portion at the leading end of the winding and stops the combustion. Then, the smoke is sucked by the above-mentioned smoking mechanism 11 so that all the smoke remaining inside the winding is sucked.

Further, when the cutting is completed, the robot 31 is operated, and the gripping mechanism 35 of the working hand 33 is opposed to the front surface of the smoking machine main body 1 and grips and removes the cigarette butt of the cigarette roll 4. And the mounting of this cigarette, ignition,
After repeating operations such as stopping combustion by cutting and removing butts four times, the holder 3 is removed from the smoking port 2 by the above-described gripping mechanism 35 '.

The robot 31 is moved by the moving mechanism 21 and is located in front of an arbitrary smoking port 2. The robot 31 repeats the above-described operation, and repeats the above operation for all the smoking ports 2. Automatically performs winding, mounting of holder, ignition, cutting of combustion part, and removal of butts and holder.

A smoke exhaust hood 61 is provided above each of the smoking ports 2 to control the flow of air around the winding 4 attached to each of the smoking ports 2. These smoke exhaust hoods 61 are configured to be movable up and down by a cylinder mechanism 62. When various operations are performed by the above-described robot 31, these smoke exhaust hoods 61 are moved upward, and the robot arm and the like are moved. To prevent interference. Further, a small fan 63 is provided at the upper end of the smoke exhaust hood 61, and a forced air flow is generated in the smoke exhaust hood 61 and below the periphery of the cigarette winding.
It is configured to send air containing smoke or gas upward, for example, to a duct 64 disposed above the smoke exhaust hood 61.

A conveyor mechanism 51 is provided below the above-mentioned smoking port 2. This conveyor mechanism 51
Are arranged along the horizontal direction. An endless belt is stretched over the conveyor mechanism 51, and the belt 53 is horizontally moved by a driving mechanism (not shown). The belt is formed of a heat-resistant material, for example, a thin metal plate such as stainless steel.

An ashtray container 55 is disposed below the end of the conveyor mechanism 51. Therefore,
The ash, butts, etc. of the rolls that have fallen on the belt of the conveyor mechanism 51 are conveyed in the horizontal direction by the traveling of the belt and fall into the ashtray container 55 described above.

Next, in such an automatic smoking machine, a device for accurately detecting the position of the leading end of the cigarette roll 4 attached to the smoking mouth 2 and ensuring ignition of the leading end of the cigarette winding. Will be described.

FIG. 5 shows the gripping mechanism 35 of the work hand 33 described above. The gripping mechanism 35 includes a pair of fingers 7.
1 and these fingers 71
Are opened and closed while maintaining a parallel state with each other, and the cigarette is gripped.

An optical detector, for example, a light source 73 such as an LED, and a photodiode 74 are provided at the tips of the fingers 71. These are attached to the fingers 71 and face each other. Therefore, the light emitted from the light source 73 is received by the photodiode 74. Therefore, if another object, that is, the cigarette winding 4 exists between the fingers 71, that is, between the light source 73 and the photodiode 74, the light from the light source 73 is blocked.

Then, the robot 31 attaches the cigarette roll 4 to the smoking opening 2 and then sets the finger 7
1 in an open state, and the tobacco winding 4 attached as shown in FIG.
5 is moved in the axial direction of the tobacco winding 4. Therefore, when the light source 73 and the photodiode 74 correspond to the middle portion of the cigarette winding 4, light is blocked by the cigarette winding 4, and the photodiode 74
Does not detect light. When the gripping mechanism 35 further moves, and the light source 73 and the photodiode 74 pass over the leading end of the cigarette winding 4, light from the light source 73 is incident on the photodiode 74, thereby causing the cigarette to emit light. The leading end of the winding 4 is detected.

The robot 31 stores the position in this case, that is, the position of the leading end of the cigarette roll 4.
When the cigarette winding 4 is ignited, the heater of the ignition mechanism 37 attached to the working hand 33 is directed to face the front surface of the smoking machine main body 1 as described above, and the ignition is performed. The heater of the mechanism 37 is brought into contact with the leading end of the cigarette winding 4 to ignite. In this case, the movement position of the ignition mechanism 37 is controlled based on the position information of the leading end of the cigarette winding 4. Therefore, the heater surely comes into contact with the leading end of the cigarette winding 4 and can reliably ignite. Further, it is possible to prevent the heater 4 from hitting the leading end of the cigarette roll 4 too strongly, and thereby preventing the cigarette roll 4 from shifting.

Further, the combustion detecting mechanism 41 can be set at a position corresponding to the burning length of the winding 4 with reference to the position of the leading end of the winding 4 as described above. The combustion position of the tobacco roll 4 is determined by the combustion position detection mechanism 41 described above.
When the cigarette winding 4 is burned from the position of the above-mentioned tip to a position of a predetermined length, the burning part of the cigarette winding is cut by the above-described cutting mechanism 36, and the combustion is stopped. .

Next, referring to FIG.
Will be described. That is, the cutting mechanism 36 includes a pair of check members 81, which are protruded from the work hand 33, and are provided with an opening / closing drive mechanism (not shown) provided in the work hand 33. )
Are moved in parallel with each other in the direction in which they come and go. A pair of opening / closing members 82 are attached to and detached from the distal ends of these check members 81.

The opening / closing members 82 move in a direction in which the opening / closing members 82 come into contact with and separate from each other integrally with the above-mentioned chuck member 81. Further, for example, two guide rods 83 are provided below these opening / closing members 82. These guide rods 83 penetrate the sliding members through the sliding bush 85 provided on the opening / closing member 82, and these opening / closing members 82
Guides you to move accurately. Further, a compression coil spring 84 is interposed between these opening / closing members 82 and urges these opening / closing members 82 in a direction away from each other.

A pair of cutting blades 86 are attached to the front ends of these opening / closing members 82. In addition, these cutting blades 86 are attached by bolts 87,
By removing these bolts 87, they can be easily replaced. These cutting blades 86 have a thin plate shape and are protruded so as to face each other. Further, these cutting blades 86 are configured by combining two symmetric right-angled triangular blades, and the opposing tips form a mountain, for example, an isosceles triangle, and the blades are formed on the slopes on both sides thereof. . And these mountain-shaped cut parts 86 are arrange | positioned so that the top part may mutually oppose. Also,
These cutting blades 86 are displaced in the thickness direction by the thickness of the cutting blades.
The tip portions of the angled cutting blades 86 are configured to overlap in the plate thickness direction when the two move close to each other.

The cutting mechanism 36 configured as described above
The opening / closing member 82 is moved to the position of the cigarette roll 4 to be cut in the separated open state, and these opening / closing members 8 are moved.
The cigarette winding 4 is located between the two. Further, the cutting mechanism 36 is moved in the axial direction of the cigarette roll 4, and the position of the cutting blade 86 is set at a position where the cigarette roll is to be cut, that is, slightly behind the burning portion at the leading end of the cigarette roll. Is located.

Then, by the opening / closing drive mechanism described above,
The above-mentioned check members 81 are moved in a direction approaching each other, and at the same time, the opening / closing members 82 are moved in a direction approaching each other. Thereby, the above-mentioned cutting teeth 86 approach,
As shown in FIG. 8, the tops of these cutting blades 86 pierce both side surfaces of the cigarette roll 4, and when the cutting blades 86 are further approached, the blades on the slopes on both sides of the cutting blades 86 cause this. The cigarette roll 4 is cut open on both sides. When the cutting blades 86 are further advanced, the tips of the cutting blades 86 overlap in the plate thickness direction as shown in FIG. 9, and the cutting blades 86 are further predecessors to cut the cigarette winding. Then, the burning of the tobacco winding 4 is stopped by cutting the burning portion at the tip of the tobacco winding 4 in this way.

It should be noted that, even after the end of the cigarette roll 4 is cut off and the combustion is stopped, the smoking mechanism 11
Is activated for a predetermined period of time to aspirate and analyze residual smoke in the rest of the cigarette roll.

As described above, the burning position detecting mechanism 41 for detecting infrared rays when the burning portion at the tip of the tobacco roll 4 reaches a predetermined burning length is provided. Less than,
Referring to FIG. 10 to FIG.
1 will be described.

When the combustion position detecting mechanism 41 has burned a predetermined length from the leading end of the cigarette winding detected by the above-described device for detecting the leading end position of the cigarette winding, the combustion is performed up to the predetermined position. This is to detect the advance and operate the cutting mechanism 36 described above.

The combustion position detection mechanism 41 has a detection head 91. The detection head 91 is configured to be moved forward, backward, and rotated by the head moving mechanism 90. That is, the detection head 91 is attached to the distal end of the rod 92, and the detection head 91 is disposed diagonally below the smoking port. The rod 92 is rotatably and slidably supported by a bearing 93 provided on the front plate 5 of the smoking machine main body 1 described above, and penetrates the front plate 5 horizontally.

A rotary actuator 95 is provided inside the smoking machine main body 1, and a cylindrical sleeve 96 is connected to the rotary actuator 95. The sleeve 96 has a pair of slits 97 facing each other at 180 ° along the axial direction. The rear end of the rod 92 is inserted into the sleeve 96.
A pin 98 projecting in a letter shape is slidably fitted in the sleeve 96. Therefore, the rod 92 and the detection head 91 are rotated by the rotary actuator 95 described above.

A moving member 99 is provided in the smoking machine main body 1 so as to be movable in the axial direction of the rod 92, and the moving member 99 is reciprocated in the axial direction of the rod by an actuator (not shown). You. The moving member 99 is connected to the pin 9 at the rear end of the rod 92.
8, the moving member 99 moves so that the rod 92 slides back and forth in the axial direction, and the detection head 91 moves in the front and rear direction. .

FIGS. 11 and 12 show the structure of the detection head 91 described above. The detection head 91 includes housings 101 and 102, which are assembled via an O-ring 103. And this housing 10
An infrared sensor 104 is accommodated in each of the light emitting devices 1 and 102. As the infrared sensor 104, for example, a Ge photodiode having a characteristic of having a large sensitivity to infrared rays having a short wavelength emitted from the burning part of the cigarette is used.

The housing 101 has an opening 106 for allowing infrared rays to enter the infrared sensor. A hood 107 protrudes outward from the opening 106.

The hood 107 has a semicircular cross section, and is arranged so that its arc-shaped portion faces forward, that is, the tip side of the cigarette roll, and its edge portion faces rearward, that is, the base end side of the cigarette roll. Therefore, the detection accuracy of the position of the burning portion of the tobacco roll 4 is improved.

That is, as shown in FIG. 13, infrared rays are radiated in all directions from the burning part of the cigarette winding. This hood 107 is a sensor for detecting infrared rays
The direction of incidence on the hood 107 is restricted, and this infrared ray is made to enter the infrared sensor 107 only when the black line at the boundary between the burned portion and the unburned portion exceeds the tip of the hood 107.

Since the hood has a semicircular cross section as described above, there is no internal reflection and the incident direction of the infrared rays can be strictly controlled. That is, for example, when the hood has a circular cross section like the hood 107a shown in FIG. 14, the hood 107a enters the tip of the hood 107a from an oblique direction before the combustion part advances to a predetermined position at the tip of the hood 107a. Infrared light is a hood 107 having a circular cross section.
The light is reflected inside a and enters the infrared sensor 104. However, a hood 1 having a semicircular cross section as described above
If it is 07, there is no reflection inside as described above, and the infrared ray enters the infrared sensor only when the black line at the boundary between the burned part and the unburned part exceeds the position of the tip of the hood 107. Therefore, the accuracy of detecting the position of the combustion part is improved.

The combustion position detecting mechanism 41 operates as follows. First, when the cigarette roll 4 is mounted, the pin 98 of the combustion position detecting mechanism 41 is pushed out by the moving member 99 to move the head forward by several cm. Thereafter, the moving member 99 is retracted to the original position, and the head 91 is moved.
Is ready to move back and forth. Further, the rod 92 is rotated, and the hood 107 of the detection head 91 is oriented in the horizontal direction. Therefore, the aforementioned holder 3
When the cigarette roll 4 is mounted, the detection head 91 is prevented from interfering with the arm 32 of the robot 31, the gripping mechanism 35, and the like.

Next, when the cigarette winding 4 is mounted and the position of the leading end of the cigarette winding is detected by the cigarette winding leading end position detecting device as described above, the detected position of the leading end is used as a reference. Then, the combustion stop position of the cigarette winding, that is, the position of a predetermined expected burning length from the leading end of the cigarette winding is calculated. Then, with the detection head 91 advanced, the rod 92 is rotated, and the hood 107 of the detection head 91 is directed obliquely upward, that is, toward the side surface of the wound cigarette. Then, the hood 107 of the detection head 91 is positioned by the arm 32 of the robot 31 at the position of the above-described combustion length, and thereafter, the cigarette winding 4 is ignited.

When the burning of the tobacco winding 4 proceeds and the black line, which is the boundary between the burned portion and the unburned portion, exceeds the position of the tip of the hood 107, the relatively radiated wavelength emitted from the burned portion is reduced. Short infrared rays enter the infrared sensor 104 of the detection head 91, and the infrared sensor 104 detects this and outputs a signal. When this detection signal is output, the rod 92 rotates and the hood 107
Is directed in a substantially horizontal direction, and prevents interference with the arm 32 of the robot 31, the cutting mechanism 36 of the work hand 33, and the like.
Then, the robot 31 is operated by the detection signal, and the burning portion of the tobacco winding 4 is cut by the cutting mechanism 36, and the burning is stopped.

After the burning part is cut off as described above, the smoking mechanism 11 continues to operate for a predetermined time.
The smoke remaining in the unburned part of the cigarette is aspirated and analyzed. Therefore, the accuracy of this analysis result is improved.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, an automatic winding device for automatically attaching and detaching a cigarette is provided, and a cutting mechanism for the cigarette winding is attached to the automatic winding device. The present invention is not limited to this, and the cutting mechanism may be configured as a separate device from the automatic winding / unmounting device, and the above automatic winding / unmounting device may not necessarily be provided. .

[0055]

As described above, according to the present invention, when detecting the combustion position, the detection head is positioned at the position corresponding to the combustion stop position of the cigarette winding and rotated to rotate the hood. The hood turns to the side of the cigarette winding and turns after the detection of the combustion position is completed, so that the hood turns substantially in the horizontal direction. Therefore, when no detection is performed, there is no possibility of interference with other mechanisms. Only when the detection is performed, the detection head can be positioned near the cigarette winding and the hood can be directed to the cigarette winding, so that the detection accuracy of the combustion position is improved.

[Brief description of the drawings]

FIG. 1 is a front view of the entire automatic smoking machine of the present invention.

FIG. 2 is a plan view of the entire automatic smoking machine of the present invention.

FIG. 3 is a side view of the entire automatic smoking machine of the present invention.

FIG. 4 is a side view of the smoking mechanism.

FIG. 5 is a plan view of a gripping mechanism.

FIG. 6 is a front view of a cutting mechanism.

7 is a view taken in the direction of arrow 7-7 in FIG. 6;

FIG. 8 is a schematic diagram illustrating the operation of cutting by the cutting mechanism.

FIG. 9 is a schematic view of another state illustrating the operation of cutting by the cutting mechanism.

FIG. 10 is a perspective view of a combustion position detecting mechanism.

FIG. 11 is a longitudinal sectional view of a detection head.

FIG. 12 is a sectional view taken along lines 12-12 in FIG. 11;

FIG. 13 is a schematic diagram illustrating the detection operation of the detection head.

FIG. 14 is a schematic diagram illustrating a detection operation when a hood of a different form from the present invention is provided.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Smoking machine main body 2 ... Smoking mouth 11 ... Smoking mechanism 21 ... Moving mechanism 31 ... Robot 33 ... Working hand 41 ... Burning position detecting mechanism 90 ... Head moving mechanism 91 ... Detection head 104 ... Infrared sensor 107 ... Food

Continuation of the front page (72) Inventor Kokichi Suda 1-31 Kurobeoka, Hiratsuka-shi, Kanagawa Japan Tobacco Inc. Production Technology Development Center (58) Field surveyed (Int.Cl. ⁷ , DB name) G01N 33/00 A24C 5/00

Claims (2)

(57) [Claims] 1. A smoking machine body having a plurality of smoking ports, a burning position detecting mechanism for detecting a burning position of a leading end of a cigarette wound attached to the smoking port, and a burning section of the cigarette winding. A cutting mechanism for cutting and stopping the combustion, wherein the combustion position detection mechanism is provided with a detection head positioned corresponding to a position where the combustion of the cigarette is stopped, and provided in the detection head. And a hood protruding from the detection head and pointing to the side surface of the cigarette winding. The detection head is moved forward and backward along the axial direction of the cigarette winding, and the detection is performed. A head moving mechanism for rotating the head about the axis in the forward / backward direction. The detection head advances and rotates to a position corresponding to the combustion stop position of the cigarette winding when detecting the combustion position. The hood is directed to the side surface of the cigarette winding, and is positioned and rotated after the detection of the combustion position is completed, and the hood is turned substantially in the horizontal direction. A combustion position detection mechanism for cigarette winding. 2. The hood has a semicircular cross section,
2. A mechanism for detecting a burning position of a cigarette roll of an automatic smoking machine according to claim 1, wherein said arc-shaped portion is located at the leading end side of said cigarette roll.