CN1079018C - Filter mounting apparatus - Google Patents

Abstract

The present invention relates to a filter tip installing device. A receiving roller for forming a filter tip paper sheet and a rolling passage plate are prepared, and a rolling passage is synergistically specified with the outer circumference surface of the receiving roller. A left concave part and a right concave part 54 are arranged on the upper surface of the rolling passage plate. The concave parts 54 are used for reducing intermediate products rolling in the rolling passage, namely the contact resistance between a cigarette and a rolling surface.

Description

Filter installation device

technical field

The invention relates to a device for installing cigarette filters. The device connects two cigarettes and filter rods and is used to form double-filter cigarettes equivalent to two filter cigarettes.

technical background

Known double-filter cigarettes are formed by first disposing filter rods between two cigarettes to form intermediate products, and then wrapping filter paper sheets on the intermediate products to connect the two cigarettes and filter rods to each other. Then, it is cut from the center of the double-filter cigarette, that is, the filter rod, and shaped into a single filter cigarette.

The above-mentioned double-filter cigarette is formed by a filter fitting device, such a filter fitting device has been disclosed in, for example, Japanese Patent Application Laid-Open No. 63-196257 and Japanese Patent Laid-Open No. 4-211355. The filter tip installation device is equipped with a filter tip paper supply cylinder and a rolling plate, and these supply cylinders and the rolling plate cooperate to determine the rolling path of the above-mentioned intermediate product. More specifically, the rolling passage is defined between the outer peripheral surface of the supply cylinder and the upper surface of the rolling plate, that is, the rolling surface. While the intermediate product is introduced into the rolling passage, the filter paper is supplied to the outer peripheral surface of the intermediate product, and the paste is coated on one side of the filter paper. Therefore, the filter paper sheet is wound onto the intermediate product rolling through the rolling passage at the same time as the filter paper sheet is adhered to the intermediate product. As a result, the above-mentioned double filter cigarette was obtained. After the filter paper sheet is wound, the two ends of the filter paper sheet form overlapped parts overlapping each other.

In recent years, in order to improve the productivity of filter cigarettes, the transport speed of intermediate products has been increased. In order to still wind the cut paper stably during the high-speed conveyance of the intermediate product, that is to fully ensure the combination of the filter tip paper and the intermediate product, the intermediate product is rolled several times during the process of passing through the rolling passage.

The intermediate product passing through the rolling passage is in a state of being pinched between the filter paper sheet supply cylinder and the rolling plate. Therefore, the more the rolling times of the intermediate product increase, the more the cigarettes in the intermediate product are kneaded and loosened, so that the hardness of the cigarettes decreases.

Then, the formed double-filter cigarette is sent out from the rolling passage, and during the transportation on the downstream side of the conveying path, the insufficient hardness of the cigarette will cause the shredded tobacco to fall off from both ends of the double-filter cigarette or one end of the single-filter cigarette, which becomes shredded tobacco. s reason.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a filter attachment device which prevents shredded tobacco from falling off without reducing the hardness of the cigarette portion.

In order to achieve the above object, the filter tip mounting device of the present invention is equipped with a reducing mechanism that reduces the resistance of the contact rolling passage. When the intermediate product moves while rolling in the rolling passage, the reducing mechanism reduces the rolling passage for the intermediate product cigarette. contact resistance. The lowering mechanism includes a pair of recesses formed on one of the outer peripheral surface of the above-mentioned supply roller and the above-mentioned rolling surface, and these recesses have a distance corresponding to the width of the filter paper sheet when viewed from the moving direction of the intermediate product in the rolling passage. Separated and extending along the rolling path.

The above-mentioned pair of recesses reduces the contact area between the cigarette of the intermediate product and the outer peripheral surface of the supply drum or the rolling surface when the intermediate product rolls through the rolling passage. Therefore, the rubbing of the cigarette of the intermediate product in the rolling passage is reduced, the hardness of the cigarette can be maintained, and it can be shaped into a double-filter cigarette. Therefore, the shredded tobacco can be prevented from coming off from both ends of the double-filter cigarette when the double-filter cigarette is sent out from the rolling passage and conveyed in the transport path downstream of the rolling passage. As a result, the productivity of filter cigarettes can be improved.

Preferably, the pair of recesses are formed on the rolling surface of the rolling plate, the recesses extend along the rolling passage except the entrance portion of the rolling passage, and open sideways at corresponding side edges of the rolling surface. At this time, the intermediate product that has just been introduced into the rolling passage is supported on the surface of the rolling passage along its entire length, so the intermediate product rolls stably, so that the filter paper is actually wound on the intermediate product, that is, the double filter The forming of the cigarette is carried out reliably. In addition, the length of the entrance portion of the above-mentioned rolling passage is preferably the length required for the first rotation of the intermediate product in the rolling passage.

Then, when the cigarette portion of the formed double-filter cigarette passes through the corresponding recesses, since each recess expands to the corresponding side edge of the rolling plate, the contact area between the rolling surface and the cigarette portion is greatly reduced.

The aforementioned pair of recesses may also extend from the entrance to the exit of the rolling passage. At this time, it is preferable to form the pair of recesses so that both side edges of the lower rolling surface remain. When the intermediate product and the formed double-filter cigarette move while rolling in the rolling passage, the both ends of the intermediate product and the double-filter cigarette are supported on the rolling surface together with the central part, and their rolling is maintained stably. It is preferable that the said rolling surface has the 2nd recessed part extended along the said recessed part on both sides. These second recesses prevent both ends of the intermediate product and the double-filter cigarette from contacting the rolling surface.

In addition, the above-mentioned rolling surface may have a protruding strip at the entrance of the rolling passage, and the section of the protruding strip is arc-shaped, extending toward the direction crossing the rolling passage. The protruding strip narrows the entrance of the rolling channel, and serves as an actuating part to promote the rolling of the intermediate product, so as to ensure the initial adhesion of the filter tip paper sheet to the intermediate product.

Brief description of the drawings

Fig. 1 is a schematic diagram showing a filter cigarette manufacturing machine and its manufacturing procedure.

Fig. 2 is an enlarged view showing a rolling member of the manufacturing machine shown in Fig. 1 .

Fig. 3 is a top view of the rolling plate shown in Fig. 2 .

Fig. 4 is a view explaining the operation of the rolling member shown in Fig. 2 .

Fig. 5 is a cross-sectional view of the rolling plate shown in Fig. 2 .

FIG. 6 is a graph showing the effectiveness of the rolling plate shown in FIG. 2. FIG.

Fig. 7 is a view showing another embodiment of the rolling plate.

Fig. 8 is a view showing still another embodiment of the rolling plate.

The best form for carrying out the invention

As shown in FIG. 1 , the filter cigarette making machine has a main frame 2 . In FIG. 1 , a roller system 4 is disposed on the right side of the main frame 2 . The drum system 4 is used as the delivery path of double cigarettes and single cigarettes, and extends to the rolling part (filter tip installation device) 6 all the time.

The drum train 4 comprises several grooved drums. The outer peripheral surface of each grooved roller has a plurality of conveying grooves, and these conveying grooves are arranged at equal intervals in the circumferential direction of the grooved roller. In the roller train 4 , the grooved roller located at the far right in FIG. 1 is the inlet roller, the so-called take-up roller 8 . Each delivery channel of the receiving drum 8 can receive double cigarettes D sequentially from a cigarette manufacturing machine not shown in the figure. The double cigarette D has twice the length of the cigarette portion in the filter cigarette.

The double cigarettes D received in the transport groove of the receiving drum 8 are transferred to the drum adjacent to the left side in FIG. . A grooved drum 10 in the drum train 4 is provided with rotary knives 12 . The rotary knife 12 cuts the double cigarette D on the grooved drum 10 equally from its center to form two single cigarettes S. FIG. Then, two single cigarettes S are transferred from the grooved drum 10 to two successively adjacent grooved drums. During transport, 2 single cigarettes are separated from each other in the direction of their axis. As a result, a predetermined space is ensured between two single cigarettes S. FIG. In FIG. 1 , the area _A1 shows the manufacturing procedure of cutting a double cigarette D into two single cigarettes S and separating these single cigarettes S from each other.

A filter supply device 14 is arranged above the drum system 4 . The supply device 14 is equipped with a pair of left and right hoppers 16, and many filter rods (not shown) are stored in these hoppers 16. The left and right hoppers 16 are connected with the roller system 4 through the roller system 18 . More specifically, the roller system 18 includes a plurality of grooved rollers similarly to the roller system 4 , and the grooved roller at the lower end of the roller system 18 is in contact with the assembly roller 20 in the roller system 4 . The assembly drum 20 is a grooved drum in the drum train 4 that receives single cigarettes S separated from each other.

The drum system 18 takes out filter rods one by one from the left and right hoppers 16 and transports them to the assembly drum 20 . In this transportation process, the filter rods are shaped into individual filters F through cutting processing, classification processing, alignment processing, etc., and these filter plugs F are sequentially supplied to the assembly drum 20 one by one. Specifically, these filters F are supplied into the space between two single cigarettes S on the assembly drum 20 . The length of the filter F is twice the length of the filter in the filter cigarette.

When a charcoal filter rod is stored in one hopper 16 and a normal filter rod is stored in the other hopper 16, the filter F becomes a double filter. And when ordinary filter rods are stored in the left and right hoppers 16, the combined filter tip F becomes an ordinary filter tip.

Then, the 2 single cigarettes S and 1 filter tip F assembled on the assembling drum 20 are moved from the assembling drum 20 to the next grooved drum, that is, onto the arrangement drum, where they are arranged neatly, Each single cigarette S is in close contact with both ends of the filter F. That is, at this point, an intermediate product I of a double-filter cigarette is obtained. The intermediate product I is then fed from the alignment rollers to the rolling unit 6 via the outlet roller located at the leftmost end of the roller system 4 . In FIG. 1 , an area A ₂ shows a state where a filter F is supplied between two single cigarettes S, and then an intermediate product I is formed.

A supply line of cut paper P is extended to the rolling section 6, which supply line is provided with a pair of paper rolls 22,24. These paper rolls 22, 24 are arranged at the upper left end of the main frame 2 in FIG. 1 . Among the paper rolls, one paper roll 22 is a roll in use, and the other paper roll 24 is a roll on standby. After the cut paper P is drawn out from the paper roll 22 in use, it is guided to the rolling section 6 while being guided by a plurality of guide rollers in the supply line.

In the supply line, the paper connecting device 26 used when replacing the used roll, the storage device 28 of the cut paper P, the coating device 30 for applying paste to one side of the cut paper P, and the cut paper P are arranged sequentially from the upstream side. The paste-applied surface of P is dried to a certain degree by the heater 32 .

At the rolling part 6, the cut paper P is cut into a filter sheet Pc having a predetermined length, and the filter sheet Pc is wound onto the intermediate product I, and as a result, a double filter cigarette DFS is obtained. The filter paper Pc is wound around the end of the single cigarette S on the intermediate product I with the filter F as the center, and the filter F and the two single cigarettes S are connected to each other. The area _A3 in FIG. 1 shows how the filter paper sheet Pc is wound onto the intermediate product I in the rolling unit 6 .

Then, the double-filter cigarette DFS is supplied onto the roller train 34 extending from the rolling member 6 and is conveyed on the roller train 34 . The drum system 34 also includes a plurality of grooved drums similarly to the drum system 4 , and the double-filter cigarette DFS is conveyed sequentially through each grooved drum of the drum system 34 . During this conveyance, the double-filter cigarette DFS is cut from the center by the rotary knife to become two filter cigarettes FS, and the two filter cigarettes FS are separated from each other in the axial direction.

Then, each filter cigarette FS is subjected to the above-mentioned inspection of edge drop and thinness, etc., and defective filter cigarettes FS are excluded from the drum system 34 .

At the end of the roller system 34 is attached a conveyor belt 36 . The conveyor belt 36 receives filter cigarettes FS from the drum train 34 . After the orientation of the filter cigarettes FS is adjusted on the conveyor belt 36, the filter cigarettes FS are supplied to a packaging machine not shown in the figure. The area _A4 in Fig. 1 shows that the double filter cigarette DFS is cut into two filter cigarettes FS on the drum system 34, and then these filter cigarettes FS are separated from each other.

As shown in FIG. 2 , the rolling unit 6 includes a receiving roller 38 for receiving cut paper P. As shown in FIG. The receiving drum 38 is arranged between the outlet drum 40 of the drum train 4 and the inlet drum 42 of the drum train 34 . More specifically, the receiving roller 38 is arranged on the upper side of the rollers 40 and 42 so as to connect these rollers 40 and 42 .

Accept the peripheral surface width of cylinder 38 slightly greater than the length of intermediate product 1. The central portion of the outer peripheral surface of the receiving roller 38 is formed as a suction surface along the entire circumference as viewed from the axial direction of the receiving roller 38 . Therefore, the cut paper P guided along the supply line is adsorbed on the suction surface of the receiving roller 38 with the paste-applied surface facing outward. Then, as the receiving drum 38 rotates clockwise ( FIG. 2 ), the cut paper P is fed toward the rotating direction of the receiving drum 38 . Viewed from the rotation direction of the receiving drum 38, the suction surface of the receiving drum 38 can accept suction supply only within the rotation angle region θ. As can be seen from FIG. 2 , the rotation angle region θ starts from the top of the receiving drum 38 and ends at a position where the outer circumference of the receiving drum 38 approaches the outer circumference of the outlet drum 40 .

Assuming that the transport speed of the intermediate product I on the roller system 4 is _V1 , the moving speed of the outer peripheral surface of the receiving drum 38, that is, the peripheral speed _V2 of the receiving drum 38 is set to be twice the transport speed _V1 of the intermediate product I.

A rotatable bladed roller 44 is arranged on the outer side of the receiving roller 38 corresponding to the suction area θ of the cut paper P. As shown in FIG. A plurality of blades 46 are provided on the outer peripheral surface of the bladed roller 44 . These blades 46 are arranged at equal intervals in the circumferential direction of the bladed roller 44 . The direction of rotation of the edged roller 44 is opposite to the direction of rotation of the receiving roller 38 . Therefore, when the cut paper P on the receiving drum 38 passes the bladed drum 44 as the receiving drum 38 rotates, the cut paper P is cut to a predetermined length by the blade 46 of the bladed drum 44 . As a result, individual filter paper sheets Pc are formed on the suction surface of the receiving drum 38 . Then, these filter paper pieces Pc are moved to the end of the attraction area. The suction surface of the receiving drum 38 determines the supply path of the filter paper sheet Pc.

On the lower side of the receiving roller 38, a rolling plate 48 is disposed, and the rolling plate 48 is supported by a holder 50. As shown in FIG. The upper surface of the rolling plate 48 is formed as an arc-shaped rolling surface 49 extending along the outer peripheral surface of the receiving roller 38 . The length of the rolling surface 49 along the receiving cylinder 38 circumferential direction is 3 times of the full circumference length of the double-filter cigarette DFS, that is, the intermediate product 1. Therefore, the intermediate product I can rotate three times along the circumferential direction of the receiving cylinder 38 on the rolling surface 49 . In addition, viewed from the axis direction of the receiving cylinder 38, the width of the rolling plate 48 is approximately equal to the length of the intermediate product I. An electric heater 51 is built in the holder 50 , and the heater 51 is located near the rolling plate 48 . The electric heater 51 heats the rolling plate 48 to an appropriate temperature.

A rolling path 52 is defined between the rolling plate 48 and the receiving roller 38 , and the rolling path 52 is convexly curved downward. The height of the rolling passage 52, that is, the distance between the rolling surface 49 and the outer peripheral surface of the receiving cylinder 38 is slightly smaller than the diameter of the intermediate product 1, and is constant along the circumferential direction of the receiving cylinder 38.

As can be seen from FIG. 3 , a pair of recesses 54 are formed on the rolling surface 49 . These recessed parts 54 are located in the downstream part of the rolling passage 52, and are divided symmetrically left and right when viewed from the rotation direction of the receiving roller 38. As shown in FIG. Each recess 54 has a depth of, for example, 0.5 to 1.0 mm. The portion of the rolling surface 49 remaining between the left and right recesses 54 has a width W slightly greater than the length of the filter F of the intermediate product I. Specifically, the width W is the same as the width of the cut paper P.

The arc length from the entrance of the rolling passage 52 to the pair of recesses 54, that is, the arc length L1 from the upstream end of the rolling surface 49 until the rolling surface 49 of the recess 54 is equal to the full circumference length of the intermediate product ₁ , and the left and right recesses The arc length L of 54 is ₂ times of the whole circumference of intermediate product 1.

Protruding from the upstream end of the rolling plate 48 are claws 56 extending along an imaginary extension of the rolling surface 49 . Each claw 56 penetrates into the outlet drum 40 without hindering the rotation of the outlet drum 40 . That is, several circumferential grooves (not shown) corresponding to the pins 56 are formed on the outer peripheral surface of the outlet drum 40 . The claw 56 picks up the intermediate product I delivered to the exit drum 40 and guides it to the rolling path 52 reliably. The downstream end of the rolling plate 48 is located near the outer peripheral surface of the inlet roller 42 , so that the rolling surface 49 is smoothly connected between the outer peripheral surface of the outlet roller 40 and the outer peripheral surface of the inlet roller 42 .

In addition to the above-mentioned left and right recesses 54, the upper surfaces of the rolling surface 49 and each claw 56 form a clamping surface 57 having a high coefficient of friction. Specifically, the clamping surface 57 is formed by embossing the rolling surface 49 and the upper surfaces of the claws 56 . Further, at the upstream end of the rolling surface 49 , a slightly protruding ridge 58 is formed at the center thereof, and the ridge 58 has an arcuate cross section and extends in the width direction of the rolling plate 48 longer than the width W described above.

Next, the operation of the above-mentioned rolling portion 6 will be described.

As shown in FIG. 4 , the conveying speed of the intermediate product I conveyed on the exit roller 40 of the roller system 4 is set to be V ₁ , and the intermediate product I enters the rolling channel 52 through the entrance at the same conveying speed V ₁ . At the entrance of the rolling passage 52, the central part of the intermediate product I, that is, the part from the filter tip F to the end of the single cigarette S, rides on the protrusion 58 of the rolling surface 49, and the intermediate product I begins to rotate. Simultaneously, the filter paper sheet Pc on the receiving drum 38 enters the entrance of the rolling passage 52 at the supply speed _V2 , and the front end of the filter paper sheet Pc adheres to the outer peripheral surface of the intermediate product I.

At this time, since the intermediate product I has started to rotate, the moving speed of the outer periphery of the intermediate product I is faster than the conveying speed _V1 , which is approximately the same as the feeding speed _V2 of the filter paper sheet Pc. Furthermore, the protrusion 58 reduces the distance between the rolling surface 49 and the receiving roller 38 . Therefore, the front end of the filter paper sheet Pc is reliably bonded to the outer peripheral surface of the intermediate product I, and as a result, the initial bonding of the filter paper sheet Pc is performed stably. At this time, the subsequent intermediate product I on the outlet drum 40 has not yet reached the entrance of the rolling passage 52, so the same filter paper sheet Pc will not be bonded to the preceding intermediate product I and the subsequent intermediate product I at the same time.

When the intermediate product I passes over the protruding bar 58, the front end of the filter paper piece Pc becomes a state pinched between the receiving drum 38 and the intermediate product I, and at the same time, at this moment, the suction of the filter paper piece Pc by the receiving drum 38 is released. Therefore, the intermediate product I moves at a speed consistent with the peripheral speed _V2 of the receiving drum 38 while rolling in the rolling passage 52 . The rolling of the intermediate product I causes the filter paper sheet Pc to be peeled off from the outer peripheral surface of the receiving drum 38 and bonded to the outer peripheral surface of the intermediate product I, and finally, the filter paper sheet Pc is wound on the intermediate product in a state where both ends overlap each other. on i.

As mentioned above, the peripheral speed V ₂ of the receiving drum 38 is set to twice the conveying speed V ₁ of the intermediate product 1, so when the filter paper sheet Pc is wound on the outer peripheral surface of the intermediate product 1, that is, the intermediate product When I rolls only one turn initially in the rolling passage 52, the rear end edge of the filter paper sheet Pc does not contact the subsequent intermediate product I beyond the subsequent intermediate product I. As a result, the subsequent intermediate product I and the next filter paper sheet Pc enter the rolling passage 52 synchronously.

As mentioned above, the initial rotation of the intermediate product 1 in the rolling passage 52 is carried out on the _L1 area on the rolling surface 49, which serves as the clamping surface 57 covering the entire length of the intermediate product 1 . Therefore, the intermediate product I does not slide on the rolling surface 49, that is, the nip surface 57, but rolls, and the winding of the intermediate product I by the filter paper sheet Pc can be reliably and stably performed.

Then, the intermediate product 1, i.e. the double-filter cigarette DFS, which is completely wound with the filter paper sheet Pc, rotates twice in the rolling passage 52 with the rotation of the receiving drum 38, and then escapes from the rolling passage 52, and transfers to the rolling passage 52. On the inlet drum 42 of the above-mentioned drum system 34 .

Since the rolling plate 48 is in the state of being heated by the electric heater 51 in the holder 50, the paste-coated surface of the wound filter paper sheet Pc dries quickly, and the adhesion to the intermediate product I becomes firm.

When the double-filter cigarette DFS is rolled in the rolling passage 52 , the rolling surface 49 is formed only between the pair of concave portions 54 . Therefore, as can be seen from FIG. 5, only the central part of the double-filter cigarette DFS, that is, the part around which the filter paper sheet Pc is wound, is pinched between the rolling plate 48 and the receiving drum 38, and the left and right cigarette parts will not be caught by the rolling plate 48 and the receiving cylinder. Roller 38 is held hostage. As a result, the left and right cigarette parts are not rubbed apart by the rolling of the double-filter cigarette DFS, and the hardness of these cigarette parts can be maintained sufficiently.

Table 1 The difference in deformation rate in the vertical direction The difference in deformation rate in the horizontal direction Average deformation rate Rolling plate (prior art) 2.67 3.12 2.89 Rolling plate (example) 2.03 1.35 1.69 Improvement effect -1.20

Table 1 shows the results of the pull-out inspection performed on the manufactured filter cigarette FS. In this pull-out inspection, the single cigarette of the intermediate product I before passing through the rolling passage 52 and the cigarette part of the double-filter cigarette DFS after passing through the rolling passage are taken as the inspection objects, and the hardness of each inspection object is measured, that is, from the mutual The deformation rate was measured in two perpendicular directions. _The inspection results in Table 1 represent the difference ( _{Δ 1 -Δ 2} ). Here, the deformation rate refers to the deformation rate (%) of the inspection object when a predetermined load is applied to the inspection object. In addition, Table 1 also shows the same inspection results when using the conventional rolling plate. In Table 1, the vertical direction refers to the normal direction of the overlapping portion of the wrapping paper in the inspection object.

As can be seen from Table 1, the difference in deformation rate of the inspection object, that is, the portion of the cigarette, is reduced by using the above-mentioned rolling plate 48 compared to using the conventional rolling plate. This means that when the intermediate product 1 passes through the rolling part 6, the rubbing of the cigarette part is reduced, and the hardness of the cigarette part can be maintained.

Therefore, when the double-filter cigarette DFS sent out from the rolling part 6 is conveyed on the roller system 34, the shedding of shredded tobacco from both ends of the double-filter cigarette DFS or the front end of the single-filter cigarette FS is greatly reduced.

Fig. 6 shows the comparison of the shedding amount of shredded tobacco in the prior art and the present embodiment. That is, the amount of shredded tobacco falling off from the inspection object before and after the rolling member 6 comprising the rolling plate of the prior art, and the amount of falling off from the inspection object before and after the rolling member 6 comprising the rolling plate 48 of the present embodiment Comparison of shedding amount of shredded tobacco. The inspection object focuses on the shedding amount of the shredded tobacco after passing through the rolling member 6 , and the shedding amount of the shredded tobacco in the embodiment is greatly reduced compared with that in the prior art.

The shedding of shredded tobacco before the inspection object passes through the rolling part 6 mainly occurs when the double cigarette D is cut. In the prior art, the shedding amount of shredded tobacco after passing through the rolling part 6 is more than that before passing through the rolling part 6 . However, in the present embodiment, the shedding amount of shredded tobacco after passing through the rolling part 6 is greatly reduced compared with the shedding amount of shredded tobacco before passing through the rolling part 6 . This means that the kneading of the cigarette part in the rolling part 6 is reduced and the hardness of the cigarette part is maintained. As a result, if the rolling plate 48 of this embodiment is used, the shedding of shredded tobacco from the tip of the filter cigarette FS can be greatly reduced, that is, the shedding of the tip can be reduced, and the production efficiency of the filter cigarette FS can be improved.

FIG. 7 shows a rolling plate 60 of another embodiment. The rolling plate 60 has a pair of recesses 62 on its upper surface, that is, the rolling surface. These recesses 62 differ from the recesses 54 of the rolling plate 48 in FIG. 3 in the following points. The recess 54 is formed only in the downstream side portion of the rolling plate 48 , whereas the recess 62 extends over the entire area from the upstream end to the downstream end of the rolling plate 60 . However, as shown in FIG. 7 , a pair of recessed portions 62 are formed leaving the side edge portions of the lower rolling plate 60 , and these side edge portions serve as a pair of left and right pinching surfaces 64 . Therefore, when the intermediate product I and the double-filter cigarette DFS are rolling and passing through the rolling passage 52, the two ends of the intermediate product I and the double-filter cigarette DFS are supported by the clamping surface 64 shown by the two-dot dash line in Fig. 5 with. Second recesses 65 are respectively formed on both side edges of the rolling surface, and these recesses 65 extend along the recesses 62 . The second concave portion 65 prevents the two ends of the intermediate product I and the double-filter cigarette DFS from contacting the rolling plate 60, thereby reducing the rubbing of the two ends.

According to the above-mentioned rolling plate 60, the contact area between the rolling surface and the intermediate product I and the double-filter cigarette DFS can be reduced, and in addition, the stable rolling of the intermediate product I and the double-filter cigarette DFS can be ensured.

Also formed on the rolling plate 48 are left and right recesses 54 extending along the entire area from the upstream end to the downstream end of the rolling surface. At this time, the contact area between the rolling plate 48 and the intermediate product I is further reduced.

In the above embodiment, in order to reduce the contact resistance between the intermediate product I and the double filter cigarette DFS in the rolling passage 52, a pair of left and right concave parts are formed on the rolling surface. However, as shown in FIG. 8, the receiving roller 38 may be provided with small-diameter portions at both ends thereof, and the diameters of these small-diameter portions are slightly smaller than the diameter of the suction surface. Using such a receiving cylinder 38 can also reduce the contact resistance of the intermediate product I and the double-filter cigarette in the rolling passage 52. In this case, it is not necessary to form a concave portion on the rolling plate.

Claims (7)

1. filter mounting apparatus, it has filter tip scraps of paper feed mechanism, rolling plates, introducing mechanism; Above-mentioned filter tip scraps of paper feed mechanism has rotatable circular feed roller, and the outer peripheral face of this feed roller is as feed path; Above-mentioned rolling plates has the circular-arc rolling surface that extends along above-mentioned feed roller outer peripheral face, has stipulated to have the roll extrusion path of entrance and exit between this rolling surface and above-mentioned outer peripheral face; Above-mentioned introducing mechanism imports the shaft-like intermediate of the two cigarette with filter tip that disposing filtering rod between 2 cigarette in the roll extrusion path from above-mentioned inlet;

The width of above-mentioned roll extrusion path equals the length of above-mentioned intermediate at least, and from entering the mouth when the outlet side rolling is mobile on one side, the filter tip scraps of paper are wound onto on the intermediate above-mentioned intermediate, are configured as two cigarette with filter tip in above-mentioned roll extrusion path; It is characterized in that this filter mounting apparatus also has and lowers the attenuating mechanism of roll extrusion path to the contact resistance of middle goods cigarette;

Above-mentioned attenuating mechanism comprises a pair of recess, this a pair of recess is formed at least one side of the outer peripheral face of above-mentioned feed roller and above-mentioned rolling surface, moving direction from middle goods, separate about two recesses, its left and right sides separating distance is equivalent to filter scraps of paper width, and this two recess extends along the roll extrusion path.

2. filter mounting apparatus as claimed in claim 1 is characterized in that, above-mentioned a pair of recess is formed on the rolling surface, and, except the intake section of above-mentioned roll extrusion path, extend along above-mentioned roll extrusion path, at the corresponding lateral margin place of above-mentioned rolling surface towards the side opening.

3. filter mounting apparatus as claimed in claim 2 is characterized in that, the length of above-mentioned intake section is for intermediate is rotated needed length from above-mentioned inlet junior one circle in the roll extrusion path.

4. filter mounting apparatus as claimed in claim 1 is characterized in that, above-mentioned a pair of recess is extending to the export place from the inlet of roll extrusion path.

5. filter mounting apparatus as claimed in claim 4 is characterized in that, retains rolling surface both side edges portion when forming above-mentioned a pair of recess.

6. filter mounting apparatus as claimed in claim 5 is characterized in that, above-mentioned rolling surface has the 2nd recess that extends along above-mentioned recess in its both side edges.

7. filter mounting apparatus as claimed in claim 1 is characterized in that, above-mentioned rolling surface has prominent bar in the porch of roll extrusion path, and the section of this prominent bar is circular arc, extends towards the direction of cross-section roll extrusion path.

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