JP2002204683A - Filter web-wrinkling device of filter production machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the filter web-wrinkling device of a filter production machine, which uses a pair of crape rollers to form a web into a wrinkled crape web, can prevent the biting of the crape web or its small pieces between crape rollers due to the abnormality of the wrinkling process, and can surely prevent the damages of the crape rollers. SOLUTION: This filter web-wrinkling device of the filter production machine comprises a pair of crape rollers 14 comprising comb tooth rollers, upper limit and lower limit sensors 52, 54 for indirectly detecting the abnormality of the wrinkling process of the crape web CW on the basis of the extent of the looseness of the crape web CW, and a pair of clogging detection sensors 56, 58 for directly detecting the abnormality of the wrinkling process on the basis of the presence or absence of the web small pieces left in the tooth grooves of the crape rollers. When the sensors 52, 54, 56, 58 detect the abnormality of the wrinkling process, separation signals for separating a pair of the crape rollers 14 from each other are outputted, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter manufacturing machine for manufacturing a filter of a filter cigarette from a web such as paper, nonwoven fabric and film, and more particularly, to a filter for obtaining a crepe web having vertical wrinkles formed on the web. The present invention relates to a web wrinkling device.

[0002]

2. Description of the Related Art In general, a filter of a filter cigarette is obtained by wrapping a filter material made of tow of an acetate fiber with a wrapping paper, and the acetate fiber has a high cost, a low filtration rate, and a low degradability. Under such circumstances, it has been considered to use a filter web such as paper, non-woven fabric, or film having low cost, high filtration rate, and excellent decomposability instead of acetate fiber tow as the filter material. More specifically, the filter web fed from the web roll first passes through a pair of comb-shaped rollers, that is, a pair of crepe rollers in the feeding process, and at this time, between the teeth of the crepe rollers. By being sandwiched, a crepe web with vertical wrinkles is formed. Thereafter, the crepe web is compression-molded into a rod shape as in the case of the acetate fiber tow, and can be used as a filter material.

[0003]

By the way, in order for a crepe web to be suitable as a filter material, that is, to give the filter material a desired airflow resistance, it is necessary to make the vertical wrinkles very fine. For this reason, the individual teeth of the pair of crepe rollers are very thin, and their strength is low.

[0004] Therefore, if a crepe web forming process abnormality such as breakage of the crepe web downstream of the pair of crepe rollers or unstable running of the crepe web occurs, such abnormalities in the crepe roller are caused. Resulting in wrapping of the crepe web around. Such wrapping causes the crepe web to bite between the crepe rollers and damages the teeth.

[0005] Even if the above-mentioned winding does not occur, and even if a molding process abnormality such as partial exfoliation of the crepe web occurs, the exfoliated web strip remains in the tooth groove of the crepe roller. As a result, the teeth get caught between the crepe rollers, and the teeth are damaged. Conventionally, in order to avoid the damage of the crepe roller described above, the observer constantly monitors the forming process of the crepe web, and when the abnormality is visually recognized, the rotation of the crepe roller is immediately stopped. Visual inspection not only puts excessive stress on the observer, but also delays the detection of abnormalities in the molding process and does not reliably prevent damage to the crepe roller.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to quickly detect an abnormality in a molding process of a crepe web without visual inspection and to prevent damage to a crepe roller. It is an object of the present invention to provide a filter web wrinkling device for a filter manufacturing machine.

[0007]

In order to achieve the above-mentioned object, a filter web wrinkling device of a filter manufacturing machine according to the present invention (claim 1) is provided so as to be able to be separated from each other, and the filter web is provided on a crepe web. And a detector that outputs a separation signal for separating the pair of comb-tooth rollers when an abnormality in the crepe web forming process is detected.

According to the web wrinkling device for a filter described above, when the above-described abnormality in the molding process is detected, the detector outputs a separation signal. As a result, the pair of comb-tooth rollers are immediately separated from each other, and simultaneously manufactured. When the machine stop signal is output and the manufacturing machine is stopped a few seconds later, the crepe web and web strips are reliably prevented from being caught between the comb-tooth rollers.

The above-mentioned detector is provided immediately downstream of the pair of comb-tooth rollers with a feeding path interposed therebetween, and includes a pair of slack detecting sensors for detecting a slack of the crepe web from the feeding path. . Specifically, a transmission type photoelectric switch can be used as each slack detection sensor. Such a pair of slack detection sensors detects the slack when the crepe web is deviated from its feeding path due to breakage of the crepe web or unstable running thereof, and outputs a detection signal as a separation signal. I do.

[0010] The detector may be a clogging detection sensor provided for each comb tooth roller and detecting the presence or absence of a web strip in the tooth groove of the comb tooth roller. Specifically, each clogging sensor includes a detection comb movable in the radial direction of the comb-tooth roller in a state of meshing with the teeth of the comb-tooth roller, and a limit switch for detecting the movement of the detection comb. can do. Such a clogging detection sensor directly detects a web piece that is partially peeled off from the crepe web and remains in the tooth groove of the comb-tooth roller, and outputs a detection signal as a separation signal. .

The web wrinkling device for a filter may further include a tension roller for applying a predetermined tension to the crepe web downstream of the pair of comb-tooth rollers, and the tension roller is formed of a straight cylinder (claim). Item 4). Such a tension roller adheres well over the entire width of the crepe web. Therefore, even if the traveling speed of the crepe web is increased, both sides of the crepe web do not flutter, and the forming process of the crepe web is stabilized.

[0012] The web wrinkling device for a filter further includes a cleaning unit paired with each of the comb-tooth rollers. The cleaning unit is disposed in the hood, and a hood partially covering the peripheral surface of the comb-tooth roller. The scraper includes a scraper that fits in the tooth groove of the comb tooth roller, an air nozzle that blows out compressed air toward the scraper, and an exhaust unit that exhausts the inside of the hood.

According to the cleaning unit described above, foreign matter such as fine powder and dust on the web that accumulates between the tooth grooves of the comb-tooth roller is scraped off by the scraper and blown off by the compressed air from the air nozzle. Later, it is discharged together with air from the hood. When the space between the tooth grooves of the comb-tooth roller is cleaned in this manner, the crepe web is prevented from being bitten due to the accumulation of fine powder and dust.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows a filter making machine, which is roughly divided into a web processing section 2 and a winding section 4.
The web processing section 2 includes a web roll WR from which a filter web W is fed out along a feeding path 6. Here, the filter web W is made of paper, nonwoven fabric or film.

The feeding path 6 is defined by a plurality of guide rollers 8, and a dancer roller 10 is disposed upstream of the guide path. A pair of feed rollers 12 and a pair of crepe rollers 14 are sequentially arranged downstream of the dancer roller 10, and a trumpet guide 16 is arranged at the end of the feeding path 6. As the feed roller 12 rotates, the feed roller 12 feeds the filter web W from the web roll WR along the feed path 6. Thereafter, the filter web W passes through a pair of crepe rollers 14, and along with this passage, the filter web W is vertically wrinkled.
Is formed as a crepe web CW. Then, the crepe web CW passes through the trumpet guide 16 and is converged at this time.

Thereafter, the crepe web CW is sent out to the winding section 4, where it is continuously wrapped by the wrapping paper P and formed as a filter rod FR. That is, the winding section 4 has a configuration similar to that of the cigarette maker, and the wrapping paper P is supplied from the paper roll PR to the winding section 4 via the reservoir 18.

On the other hand, the winding section 4 is provided with an endless garniture tape G. The garniture tape G is supplied with the wrapping paper P and the bundled crepe web CW, and runs them in one direction. During this traveling process, the crepe web CW passes through the tongue 20 together with the wrapping paper P, and is compression-molded so that the cross section thereof becomes substantially a perfect circle, while the wrapping paper P wraps the crepe web CW from below. It is formed into a U-shape.

Thereafter, a paste is applied to one side edge of the wrapping paper P by a spray nozzle 22, and the wrapping paper P completely wraps the crepe web CW in the process of passing through a so-called short holder 24, thereby The filter rod FR is formed. The filter rod FR thus formed sequentially passes through the heater 26 and the cooler 28,
Heat drying and cooling of the glued portion of the wrapping paper P are performed,
Then, it is cut by the cutting knife 30 to obtain a filter plug FP having a predetermined length.

The winding section 4 has an elimination device for eliminating the defective filter rod FR from the winding section 4 when a molding failure of the filter rod FR occurs. Have been. FIG. 2 shows the periphery of the pair of crepe rollers 14 described above, and both the upper and lower crepe rollers 14 are comb teeth rollers. More specifically, as shown in FIG. 3, a large number of circumferential teeth 32 are formed on the outer peripheral surface of each crepe roller 14 at predetermined intervals in the axial direction thereof,
They are arranged so as to mesh with each other. Specifically, the thickness of each circumferential direction tooth 32 and its interval are 0.3 mm, 0.7 mm
The axial positions of the pair of crepe rollers 14 are fixed such that the tooth intervals between the circumferential teeth 32 meshing with each other are equal.

Since the biting depth of the circumferential teeth 32 is to be set according to the depth of the vertical wrinkles to be formed on the crepe web CW, the pair of crepe rollers 14 have a distance between these axes. It is adjustable. In particular,
The lower crepe roller 14 has lower bearings at both ends of its roller shaft, which are fixed to the frame while having a horizontal and flat upper surface. On the other hand, the roller shaft of the upper crepe roller 14 also has upper bearings at both ends thereof, and these upper bearings have slide grooves on both sides thereof,
The rail part of the frame is fitted into these slide grooves,
It is slidable up and down along these rails. The lower surface of the upper bearing is inclined, and wedge passages are formed between the lower surface of the upper bearing and the upper surface of the lower bearing, and wedges are inserted into the respective wedge passages. Each wedge is connected to a motor via a feed screw, and is movable in the wedge passage in the direction of the passage by forward / reverse rotation of the motor, that is, the feed screw. Such movement of the wedge changes the distance between the axes of the upper bearing and the lower bearing, that is, the distance between the axes of the pair of crepe rollers 14, thereby changing the above-described circumferential teeth 32.
Is adjusted.

Further, the upper bearing of the upper crepe roller 14 is provided with a lift device 34 composed of a return-type air cylinder.
(See FIG. 2). During operation of the filter maker, the lifting device 34, i.e., its air cylinder, presses the upper bearing against the lower bearing via a wedge to maintain a constant axial distance between the pair of crepe rollers 14, while the air When the cylinder is contracted, the air cylinder pulls up the upper crepe roller 14 and raises the lower crepe roller 14.
Instantly away from

The pair of crepe rollers 14 are connected via drive gears (not shown) whose roller shafts mesh with each other, and these drive gears are rotated by receiving power. Feed roller 12 and pair of crepe rollers 1
Numerals 4 receive power from the same drive motor and are rotated via respective continuously variable transmissions. That is, since the filter web W expands and contracts between the feed roller 12 and the crepe roller 14, a stable supply state of the filter web W is ensured by manually setting the speed of the feed roller 12. It has become.

When the filter web W from the feed roller 12 passes between the crepe rollers 14, the filter web W is sandwiched between a pair of meshing circumferential teeth 32 by a pair of crepe rollers 14. Vertical wrinkles are formed on the entire surface, thereby forming a crepe web CW.
A tension roller 36 is disposed in front of the pair of crepe rollers 14, and the crepe web CW sent from between the pair of crepe rollers 14 is the tension roller 3.
After being guided to 6, it is guided to the downstream side of the feeding path 6. Here, as shown in FIG. 4, the width of the crepe web CW is wider than that of the filter web W due to the wrinkling process, and the elongation in the vertical direction is also increased. Therefore, a tension roller 38 is provided to control the speed of the crepe web CW toward the winding section 4 with respect to the traveling speed of the crepe web CW in the winding section 4 and maintain the tension constant.

More specifically, the tension roller 36 is formed of a straight cylinder, and both ends of the roller shaft are rotatably supported by the lower ends of a pair of swing levers 38. The upper ends of the swing levers 38 are respectively attached to a rotating shaft 40, and the rotating shaft 40 is rotatably supported by the frame 42 described above. A rotary encoder 44 is mounted on the rotation shaft 40, and the rotary encoder 44 outputs a position signal of the tension roller 36 corresponding to the swing angle of the swing lever 38 to the controller 46 shown in FIG.

The controller 46 has a drive motor 4 common to the feed roller 12 and the crepe roller 14 described above.
8, and controls the driving of the drive motor 48 based on the position signal of the tension roller 36, that is, the peripheral speeds of the feed roller 12 and the crepe roller 14. Specifically, the controller 46 controls the feed roller 12 so that the position of the tension roller 36 falls within a predetermined range.
In addition, the peripheral speed of the crepe roller 14 is controlled to apply a certain range of tension to the crepe web CW.

The controller 46 is also electrically connected to the lift device 34 and the removing device 50 of the hoisting section 4. The lift device 34 and the removing device 50 operate in response to a command from the controller 46. Is done. For this reason, the controller 46 is electrically connected to the upper limit slack sensor 52, the lower limit slack sensor 54, and the two clogging detection sensors 56 and 58. These sensors 52, 54, 56 and 58 will be described in detail below. .

As shown in FIG. 2, the upper limit slack sensor 52 and the lower limit slack sensor 54 include a pair of crepe rollers 1.
4 and the swing lever 38, and the crepe web CW feeding path 6 is vertically arranged. More specifically, the upper limit slack sensor 52 is connected to the upper crepe roller 14.
And a transmissive photoelectric switch composed of a light emitter 52a and a light receiver 52b located at both ends of the crepe roller 14 as shown in FIG. The light emitter 52a and the light receiver 52 of the upper limit slack sensor 52
b is mounted on the above-described frame 42 (see FIG. 4) via a horizontal mounting plate 53.

If the crepe web CW breaks on the downstream side of the pair of crepe rollers 14 or the running of the crepe web CW becomes unstable and the molding process becomes abnormal, the pair of crepe rollers 14 send out. The crepe web CW to be used is composed of the tension roller 36 and the crepe roller 1.
It loosens between 4. When the loose crepe web CW blocks the light emitted from the light projector 52a toward the light receiver 52b, the upper limit slack sensor 52 detects the slack of the crepe web CW and outputs a separation signal to the controller 46. Upon receiving such a separation signal, the controller 46 operates the lift device 34 described above,
The upper crepe roller 14 is replaced with the lower crepe roller 14
And immediately stop the operation of the filter manufacturing machine. Therefore, the loose crepe web CW does not wind around the crepe roller 14, and the crepe web CW is prevented from being caught between the pair of crepe rollers 14 due to the winding, and as a result, the circumferential direction of the crepe roller 14 The damage of the teeth 32 can be reliably prevented.

On the other hand, the lower limit slack sensor 54 is similarly arranged immediately in front of the lower crepe roller 14, and similarly includes a light emitter and a light receiver. Therefore, even when the loose crepe web CW blocks between the light emitter and the light receiver of the lower limit slack sensor 54, the lower limit slack sensor 54 supplies a separation signal to the controller 46, and the controller 46 transmits the signal via the lift device 34. Pair of crepe rollers 1
4 is separated and the crepe web CW is wound,
The bite is prevented. The lower limit slack sensor 54 is supported via a mounting plate 53 on the frame 42 that supports the lower crepe roller 14.

The above-described two clogging detection sensors 56 and 5
Reference numerals 8 are provided on the frame 42 side, respectively, and have the same configuration. Therefore, here, one of the clogging detection sensors 56 located on the upper side will be described below.
The clogging detection sensor 56 includes a vertical mounting plate 60,
From one end of the mounting plate 60, the crepe roller 14
It has a horizontal mounting plate 61 projecting to the side, which mounting plate 61 further has a horizontal bracket 62. Angle members (not shown) are provided at both ends of the bracket 62, and both ends of the shaft 63 are supported by these angle members. The shaft 63 extends horizontally in the axial direction of the crepe roller 14.

The shaft 63 is provided with a plurality of, for example, ten movable tables 64 in the axial direction thereof.
4 has through holes through which the shaft 63 is loosely inserted. Therefore, each movable base 64 is provided with the crepe roller 1 by the amount of the annular gap between the through hole and the shaft 63.
4 can be independently moved in the direction of coming and going.

Each carriage 64 is provided with an adjustment screw 66 which extends through the vertical mounting plate 60 and is engaged with the mounting plate 60 via a nut 65 as a stopper. Therefore, the distance between the movable table 64 and the crepe roller 14 can be adjusted by the tightening position of the nut 65 with respect to the adjusting screw 66.

A set screw 70 is threaded through the mounting plate 60. This set screw 70
Has a pin shape at one end, and a coil spring 72 is bridged between one end of the set screw 70 and the movable base 64. The coil spring 72 urges the movable table 64 toward the crepe roller 14, however, the movement of the movable table 64 toward the crepe roller 14 is prevented by the nut 65.

Further, each movable base 64 is provided with a probe piece 78. As shown in FIG. 7, the end of the probe piece 78 on the crepe roller 14 side is formed as a comb tooth 78a. The individual teeth 78a are meshed at predetermined intervals between the circumferential teeth 32 of the crepe roller 14. More specifically, as shown in FIG. 8, the probe pieces 78 are adjacent to each other in the axial direction of the crepe roller 14, so that the comb teeth 78 a of the probe piece 78 corresponding to all the circumferential grooves 32 of the crepe roller 14. Are in mesh with each other.

On the other hand, a screw type limit sensor 81 is provided for each probe piece 78 on the mounting plate 60. Specifically, the limit sensor 81 has a contact 80 made of a screw, the contact 80 is fixed to the mounting plate 60 via an insulator 83, and the contact 80 is located between the contact 80 and the corresponding probe 78. Has a small gap. Further, a conductive piece 82 is attached to the contact 80, and the conductive piece 82 is connected to a power supply (neither is shown) through an energization detection circuit.

During the forming of the crepe web CW by the pair of crepe rollers 14 described above, if web strips partially peeled off from the crepe web CW remain between the circumferential grooves 32 of the upper crepe web 14, for example, When the residual web strip passes through the corresponding probe strip 78, it hits the comb teeth 78a of the probe strip 78, and this probe strip 7
8 is displaced toward the contact 80 side together with the movable table 64 against the urging force of the coil spring 72. When the probe piece 78 comes into contact with the contact 80 due to such displacement, the ground circuit is closed through the contact 80 and electricity flows through the limit switch 81. As a result, this current is detected by the conduction detection circuit, As a result, the separation signal is output from the limit switch 81 to the controller 46.

In this manner, even when the separation signal is received from the limit switch 81, that is, the clogging detection sensor 56, the controller 80 operates the above-described lift device 34 to move the upper crepe roller 14 to the lower side. Immediately away from the crepe roller 14. As a result,
Even if the residual web strip passes through the lower crepe roller 14 with the rotation of the upper crepe roller 14, the residual web strip does not bite between the pair of crepe rollers 14. The breakage of the circumferential teeth 32 due to the indentation can be reliably prevented.

On the other hand, even if the residual web strip remains between the circumferential teeth 32 of the lower crepe roller 14 instead of the upper crepe roller 14, the lower crepe roller 14 has the same clogging detection sensor 56 as described above. Since the clogging detection sensor 58 is provided, the remaining web strip is detected by the corresponding probe piece 78 on the clogging detection sensor 58 side, that is, by the limit switch 81. Therefore, even in this case, since the separation signal is similarly output from the limit switch 81 to the controller 46,
In response to the operation of the lift device 34, the pair of crepe rollers 1
4 are immediately separated, and the entrapment of the remaining web strip is reliably prevented.

When a lift signal is received from one of the upper limit slack sensor 52, the lower limit slack sensor 54, and one of the upper and lower clogging detection sensors 56 and 58, and the lift device 34 is operated, the defective filter in the winding section 4 described above. Rod F
Since R is formed, the controller 46 activates the rejection device 50 of the hoisting section 4 with a predetermined delay time from the operation of the lift device 34, and the rejection device 50 rejects the defective filter from the hoisting section 4. Rod F
R will be eliminated.

Referring again to FIG. 2, the pair of crepe rollers 14 are provided with cleaning units 86 and 88, respectively. These cleaning units 86,
88 has the same configuration, so that one cleaning unit 86 that forms a pair with the upper crepe roller 14.
Will be described in detail below. Cleaning unit 86
Has a dust collecting hood 90 in the vicinity of the outer peripheral surface of the crepe roller 14, and the dust collecting hood 90 extends in the axial direction of the crepe roller 14 and partially covers the outer peripheral surface. A scraper 92 is disposed in the dust collecting hood 90, and the scraper 92 is in sliding contact with the outer peripheral surface of the crepe roller 14. More specifically, as shown in FIG. 9, the scraper 92 also extends in the axial direction of the crepe roller 14, and the point of the
It has a comb-like shape that is in close contact with and meshes with. The scraper 92 is held by a holder 94.
Is attached to the above-described frame 42 (see FIG. 4) via arms at both ends thereof.

On the other hand, the air nozzle 9 is
6 are arranged. The air nozzle 96 has a nozzle opening that opens toward the comb-like pointed end of the scraper 92,
And, it is connected to a compressed air source such as a compressor through an air tube 98. Further, the dust collecting hood 90 itself is connected to an exhaust source such as a blower via an exhaust tube 100.

Therefore, during the formation of the crepe web CW by the pair of crepe rollers 14, each crepe roller 1
Crepe web CW that accumulates in the tooth spaces of the circumferential teeth 32 of No. 4
Foreign matter such as fine powder and dust is first removed from the cleaning unit 8.
At the same time as being scraped off at the comb-like pointed end of the scraper 92 of 6,88, it is blown out of the tooth groove of the crepe roller 14 in the dust collecting hood 90 by the ejection of compressed air from the air nozzle 96, and , And is discharged from the dust collecting hood 90 via the exhaust tube 100.

Thus, each crepe roller 14 has its first
Since cleaning is performed every rotation, accumulation of foreign matter such as fine powder and dust on the web in the tooth grooves of the circumferential teeth 32 can be prevented. Therefore, the crepe web C
W does not bite between the pair of crepe rollers 14, and the circumferential teeth 32 are reliably prevented from being damaged. The present invention is not limited to the above-described embodiment, and various detections are possible.

For example, upper and lower limit slack sensors 52, 5
Reference numeral 4 can use a reflection type optical length measurement sensor instead of the transmission type photoelectric switch. Further, although the upper and lower clogging detection sensors 56 and 58 use a plurality of probe pieces, the number of the probe pieces and the limit switch may be one, and the present invention is not limited to such mechanical detection. Instead, it may be one that optically detects the residual web strip in the tooth space of each crepe roller 14.

Further, the structure of the lift device is not limited to the above-described one. Still further, as shown in FIG. 10, the web processing section 2 may include a charcoal feeder 102 immediately upstream of the trumpet guide 16. The charcoal supply device 102 is disposed above the crepe web CW, and a rotatable hopper 104 storing activated carbon particles, a scatter tube 106 connecting the hopper 104 and the crepe web CW, and an outlet of the hopper 104 are rotatable. A discharge roller 108 for quantitatively discharging activated carbon particles from the hopper 10 into the spray tube 106. With such a charcoal supply device 102, a charcoal filter rod is formed in the winding section 4.

[0046]

As described above, according to the filter web wrinkling apparatus of the present invention (claim 1), when an abnormality in the molding process is detected by the detector in forming the crepe web, the detector As a result, the separation signal is output from
Upon receiving the separation signal, the pair of comb-tooth rollers can be immediately separated from each other, and the crepe web is caught between the pair of comb-tooth rollers due to an abnormality in the molding process, and the comb-tooth roller is caused by this clogging. Damage can be prevented.

If the detector includes a pair of looseness detecting sensors (claim 2), the abnormalities in the molding process are detected as looseness of the crepe web. Of the crepe web can be reliably prevented. If the detector includes a pair of clogging detection sensors (claim 3), these clogging detection sensors detect a molding process abnormality as residual web strips in the tooth spaces of the comb-tooth roller. Is more directly prevented from being caught by the crepe web.

If the tension roller for applying tension to the crepe web immediately after passing through the pair of comb teeth rollers is a straight cylinder (claim 4), the tension roller applies uniform tension over the entire width of the crepe web. However, during traveling, the flapping of both ends of the crepe web is effectively prevented, and the occurrence of abnormality in the molding process can be suppressed.

If each comb tooth roller is provided with a cleaning unit (claim 5), foreign matter such as web fine powder and dust accumulated in the tooth space of the comb tooth roller can be effectively cleaned, and the foreign matter caused by the foreign matter can be effectively removed. The occurrence of abnormal molding process can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a filter manufacturing machine according to one embodiment.

FIG. 2 is an enlarged view showing the periphery of a web wrinkling device.

FIG. 3 is a diagram showing a meshing state of a pair of crepe rollers.

FIG. 4 is a plan view of a tension roller.

FIG. 5 is a block diagram for controlling the operation of the lift device.

FIG. 6 is a diagram showing a layout of an upper limit slack sensor and a clogging detection sensor.

FIG. 7 is a diagram showing a relationship between a probe piece of a clogging detection sensor and a limit switch.

FIG. 8 is a diagram showing an arrangement of probe pieces.

FIG. 9 is an enlarged view of a scraper.

FIG. 10 is a diagram showing a web processing section according to a modified example.

[Explanation of symbols]

 14 Crepe roller (comb-tooth roller) 36 Tension roller 42 Frame 52 Upper limit slack sensor 54 Lower limit slack sensor 56 Clogging detection sensor 58 Clogging detection sensor 78 Probe piece 80 Limit switch 90 Dust collection hood 92 Scraper 96 Air nozzle

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Keisuke Minami 1-17-7 Yokokawa, Sumida-ku, Tokyo Japan Tobacco Inc. (72) Takao Furukawa 2-20-46 Horifune, Kita-ku, Tokyo No. Japan Tobacco Inc. (72) Inventor Satoshi Aida 1300 Inokoba Nitta, Sakaemachi, Minami-Kamabara-gun Niigata Pref. 1300 Nitta F-term in Sanjo Machinery Co., Ltd. (Reference) 4B045 BA02 BB02 BD04 BD41 BD50

Claims (5)

[Claims] 1. A web for a filter is fed out along a feeding path, a vertical wrinkle is formed on the web for the filter in the feeding process to form a crepe web, and the crepe web is compression-molded into a rod shape and then wrapped in a wrapping paper. A filter manufacturing machine for continuously forming a filter rod into the filter rod, the filter rod being provided so as to be separated from each other in a state in which the filter web is meshed with the feeding path interposed therebetween, and the filter web is creped when the filter web passes therethrough. A pair of comb-shaped rollers formed on the web, and a detector that outputs a separation signal for separating the pair of comb-shaped rollers at the time of detecting an abnormality in the forming process of the crepe web. Web wrinkling device for a filter of a filter manufacturing machine. 2. The apparatus according to claim 1, wherein the detector is provided immediately downstream of the pair of comb-tooth rollers with the feed path interposed therebetween, and includes a pair of slack detection sensors that detect slack of the crepe web from the feed path. The web wrinkling device for a filter of a filter manufacturing machine according to claim 1, characterized in that: 3. The device according to claim 1, wherein the detector includes a clogging detection sensor that is provided for each of the comb-tooth rollers and detects presence or absence of a web strip in a tooth space of the comb-tooth roller. 3. The web wrinkling device for a filter of the filter manufacturing machine according to 2. 4. The apparatus according to claim 1, further comprising a tension roller downstream of said pair of comb teeth rollers for applying a predetermined tension to said crepe web, wherein said tension roller is a straight cylinder. The web wrinkling device for a filter of the filter manufacturing machine according to any one of the above. 5. The comb-tooth roller cleaning unit further comprising: a hood that partially covers a peripheral surface of the comb-tooth roller; and a hood that is disposed in the hood and that is provided in a tooth groove of the comb-tooth roller. The filter manufacturing machine according to any one of claims 1 to 4, further comprising: a scraper to be fitted; an air nozzle configured to blow compressed air toward the scraper; and an exhaust unit configured to exhaust the inside of the hood. Web wrinkling device for filters.