JPH067143A - Filter-carrying device of cigarette filter-producing machine - Google Patents

Abstract

PURPOSE:To provide the filter-carrying device capable of preventing the adhesion of stains to the inner circumferential surface of an insertion hole of a guide member and of stably carrying a filter material at a high speed. CONSTITUTION:The filter-carrying device is provided with a guide member (47) having an insertion hole (50) for inserting a belt-like filter material (10) used for guiding the filter material toward a molding device (20) and a compressor (44) for charging a compressed air flow to the filter material passing through the insertion hole to transfer the filter material toward the molding device. The insertion hole has a tapered inner circumferential surface (50a) having diameters contracted toward the molding device and plural circular grooves (52) being formed on the inner circumferential surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter carrying device for a cigarette filter manufacturing machine, and more particularly to a filter carrying device for carrying a filter material using a compressed air flow.

[0002]

2. Description of the Related Art In general, a cigarette filter manufacturing machine for producing a cylindrical filter plug of cigarette has, for example, an additive such as a plasticizer and activated carbon added to a filter material made of a fibrous material such as cellulose acetate. An apparatus and a forming apparatus for forming a filter material to which an additive is added into a cylindrical shape and winding a wrapping paper around the cylindrical shape are provided. A filter transport device that transports the filter material to which the additive is added toward the molding device is provided between the addition device and the molding device.

In recent years, in order to improve the manufacturing efficiency of filter plugs, it has been desired to increase the transport speed of the filter material. As a filter conveying device that meets such demands, for example, a device utilizing a compressed air flow as disclosed in Japanese Patent Publication No. 51-5079 is provided.

This filter carrying device is provided with a guide member having an insertion hole, and this insertion hole has a tapered inner peripheral surface whose diameter is reduced in the carrying direction. Then, by supplying a compressed air flow to the filter material passing through the insertion hole, the filter material is transferred at high speed toward the molding device. Further, the filter material is formed into a substantially cylindrical shape in advance by bringing the filter material into contact with the tapered inner peripheral surface of the insertion hole at a high speed.

[0005]

The filter transporting device constructed as described above can transport the filter material at a high speed, but has the following problems.

That is, as described above, the filter material containing the additive is converged into a substantially cylindrical shape while sliding on the inner peripheral surface of the insertion hole of the guide member at a high speed. A substance having an adhesive property, which is a mixture of scattered plasticizer, activated carbon, fiber waste, etc., is generated and adheres to the inner peripheral surface of the insertion hole as dirt. When such dirt adheres to the inner peripheral surface of the insertion hole, the conveyance resistance of the filter material in the insertion hole increases, making it difficult to convey the filter material at a desired speed.

In this case, the filter material is loosened between the adding device and the filter conveying device, and as a result, the amount of activated carbon added to the filter material changes in the adding device. Therefore, it is impossible to maintain the proper quality of the filter plug. Further, when the slack of the filter material becomes large, the fluctuation of the transfer amount becomes large, and problems such as cutting and winding of the filter material occur.

Furthermore, the state of conveyance of the filter material to the molding apparatus becomes unstable, and the indentation of the cut end of the filter plug increases.

On the other hand, it is possible to prevent the above problems from occurring by stopping the operation of the cigarette filter manufacturing machine and removing the dirt adhering to the inner peripheral surface of the insertion hole. The manufacturing efficiency of the filter manufacturing machine is significantly reduced.

The present invention has been made in view of the above points, and an object thereof is to prevent dirt from adhering to the inner peripheral surface of the insertion hole of the guide member and to stably convey the filter material at a high speed. An object of the present invention is to provide a filter transport device for a cigarette filter manufacturing machine.

[0011]

In order to achieve the above object, a filter conveying device of the present invention has a guide member having an insertion hole through which a band-shaped filter material is inserted and which guides the filter material toward a molding device. , Compressed air supply means for supplying a compressed air flow to the filter material passing through the insertion hole to move the filter material toward the molding device. The insertion hole has a tapered inner peripheral surface whose diameter is reduced toward the molding device, and a groove extending in the circumferential direction is formed on the inner peripheral surface.

[0012]

According to the filter transporting device constructed as described above, the band-shaped filter material is transported through the insertion hole of the guide member by the compressed air flow supplied from the compressed air supply means, and at that time, By sliding on the inner peripheral surface of the taper, it is focused in advance in a cylindrical shape. Since a groove extending in the circumferential direction is formed on the tapered inner peripheral surface of the insertion hole, the contact between the filter material and the inner peripheral surface of the insertion hole is intermittent. As a result, the growth of dirt on the inner peripheral surface of the insertion hole is suppressed, and the amount of adhered dirt on the inner peripheral surface is reduced.

Further, the contact area between the filter material and the inner peripheral surface of the insertion hole is reduced although the filter material can be sufficiently focused. As a result, the transport resistance of the filter material when passing through the insertion hole is reduced, and the transport force of the filter material can be increased in combination with the reduction in the amount of adhered dirt. Therefore, it is possible to prevent the loosening of the filter material.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 schematically shows an entire cigarette filter manufacturing machine equipped with a filter conveying device according to the present invention. This cigarette filter manufacturing machine is equipped with a fiber processing device 12 for forming a band-shaped filter material 10 by opening a fibrous substance such as cellulose acetate and adding a plasticizer. The filter material 10 is not limited to cellulose acetate, but may be formed of paper, wool, fibrous arachi, or the like.

On the downstream side of the fiber processing device 12, there is provided a first transfer mechanism 16 for transferring the filter material 10 sent out from the fiber processing device to the front, and an adding device 14 located above the first transfer mechanism. Is provided. This adding device 14
Is the filter material 1 transported by the first transport mechanism 16.
0, an addition ring 1 for adding an additive material, for example, activated carbon, at a predetermined interval along the transport direction of the filter material.
Have eight.

A filter material 1 is provided downstream of the addition device 14.
A molding device 20, a heater 22, a curler 24, and a cutting device 25 are sequentially arranged along the transport direction of 0.
Further, between the adding device 14 and the forming device 20, there is provided a filter carrying device 26 that sends the activated carbon-added filter material 10 into the forming device 20 while forming the filter material 10 into a substantially columnar shape.

Below the molding device 20, the heater 22 and the curler 24, the filter material 10 fed from the filter conveying device 26 is passed to the cutting device 25 through the molding device, the heater and the curler. A second transport mechanism 28 for transporting is provided. The second transport mechanism 28 has a large diameter drive roller.
The roller 30 includes a driven roller 31 having a small diameter, and an endless conveyor belt 32 which is hung on these rollers and runs in the conveying direction of the filter material 10.

A wrapping paper 34 is provided below the molding device 20.
A wrapping paper roll 36 formed by winding is wound. The wrapping paper 34 sent out from the wrapping paper roll 36 is guided to the molding apparatus 20 via a plurality of guide rollers 37, and is transported by the second transport mechanism 28 together with the filter material 10 through the molding apparatus. Then, the wrapping paper 34 is wrapped around the outer peripheral surface of the filter material 10 formed into a cylindrical shape when passing through the forming device 20.

A gluing device 38 for gluing one side of the wrapping paper is provided in the middle of the conveying path of the wrapping paper 34 to the molding apparatus 20. Thereby, the wrapping paper 34 is securely wrapped around the outer peripheral surface of the filter material 10 and glued.

The wrapping paper 3 thus formed into a cylindrical shape
The filter material 10 on which the 4 is wound is the second transport mechanism 2
8 sends it to the cutting device 25 through the heater 22 and the cooler 24, and the cutting device 25 cuts it into a predetermined size. Thereby, a desired filter plug is manufactured.

Next, the filter transfer device 26 according to the present invention will be described in detail with reference to FIGS.

The filter transport device 26 includes the filter material 10.
First and second air jet transfer sections 40 and 42 arranged side by side in the transfer direction of the air jet, and a compressor 44 as compressed air supply means for supplying a compressed air flow to these air jet transfer sections. , Are provided.

The first air jet transfer section 40 has a support sleeve 46, and an inlet pipe 47 and an outlet pipe 48 as guide members fitted in the support sleeve. And these support sleeves
Bup 46, inlet pipe 47, outlet pipe 4
8 are arranged coaxially with each other and along the transport direction of the filter material 10.

The inner hole of the inlet pipe 47 forms an insertion hole 50 through which the filter material 10 is inserted. The insertion hole has a first inner peripheral surface 50a extending from the inlet end of the inlet pipe to the middle. It has a second inner peripheral surface 50b extending from the first inner peripheral surface to the outlet end of the inlet pipe. The first inner peripheral surface 50a has a taper shape in which the diameter decreases from the inlet end of the inlet pipe 47 toward the middle, and the second inner peripheral surface 50b has a cylindrical shape. The inner diameter of the outlet end of the first inner circumference circle 50a and the inner diameter of the second inner circumference surface 50b are set to be substantially equal to the diameter of the filter plug finally formed.

A plurality of annular grooves 5 are formed on the first inner peripheral surface 50a.
2 is formed. These annular grooves 52 are used as the insertion holes 5
It is formed coaxially with 0, and is formed at equal intervals along the axial direction of the insertion hole. Also,
The annular grooves 52 have the same diameter.

The inner hole of the outlet pipe 48 has an insertion hole 53 extending coaxially with the insertion hole 50 of the inlet pipe 47.
This insertion hole has a taper-shaped inner peripheral surface 53a whose diameter is reduced from the inlet end toward the outlet end.

An annular space 54 is formed between the outlet end of the inlet pipe 47 and the inlet end of the outlet pipe 48, and the annular space is compressed via a connecting pipe 55 fixed to the support sleeve 46. Machine 44. The outlet end of the inlet pipe 47 is formed so as to project into the insertion hole 53 of the outlet pipe 48, and the outer peripheral surface of the outlet end and the inner peripheral surface 53 of the insertion hole 53.
Between the annular space 54 and the outlet pipe 48
An annular nozzle hole 56 is formed extending to the outlet end of the.

The second air jet carrying section 42 is also constructed in substantially the same manner as the first air jet carrying section 40. That is, the second air jet transport unit 42 includes the support sleeve 58, the inlet pipe 60 (second guide member) fitted in the support sleeve, and the outlet pipe 6.
It has 2 and. The inlet pipe 60 is the first
Has a through hole 64 (second through hole) formed coaxially with the through holes 50 and 53 of the air jet transport unit 40, and the through hole has a taper shape with its diameter reduced toward the outlet end. First inner peripheral surface 64a of the first inner peripheral surface 64a and the second inner peripheral surface 6 of the cylindrical shape subsequent thereto.
4b and.

The insertion hole 66 of the outlet pipe 62 has a taper-shaped inner peripheral surface 66a, and an annular nozzle hole 67 formed between this inner peripheral surface and the outer peripheral surface of the outlet end of the inlet pipe 60. Is an annular space 68 formed between the inlet pipe and the outlet pipe, and a supporting sleeve.
The compressor 44 is connected through a connecting pipe 70 fixed to the bush 58.
It is connected to the.

The insertion hole 64 of the inlet pipe 60
No annular groove is formed in the first inner peripheral surface 64a of the first air jet transfer part 40, and the diameter of the inlet end of the insertion hole 64 is larger than the diameter of the inlet end of the insertion hole 50 of the first air jet transport portion 40. Has been formed.

A first guide pipe 72 is fixed to the outlet pipe 48 of the first air jet carrying section 40 and communicates with the outlet end of the insertion hole 53. This first
The guide pipe 72 of the second air jet transfer unit 42
Of the inlet pipe 60 extends to the inlet end of the insertion hole 64. Similarly, a second guide pipe 74 is fixed to the outlet pipe 62 of the second air jet transport section 42 and communicates with the outlet end of the insertion hole 66. The second guide pipe 74 extends to the inlet end of the molding device 20.

First and second guide pipes 72, 74
The inner diameter of is substantially equal to the diameter of the finally formed filter plug.

Next, the operation of the filter carrying device 26 configured as described above will be described.

The band-shaped filter material 10 sent from the adding device 14 is inserted into the insertion holes 50 and 53 of the first air jet transfer section 40, the first guide pipe 72, and the second air jet transfer device 42. It is conveyed to the molding apparatus 20 through the holes 64, 66 and the second guide pipe 74 in order.

In the first air jet transfer section 40,
A compressed air flow is supplied to the annular space 54 from the compressor 44 via a connection pipe 55, and the compressed air flow is jetted from the nozzle holes 56 toward the downstream side in the transport direction of the filter material. Therefore, the filter material 10 passing through the insertion holes 50, 53 and the first guide pipe 72 is conveyed at high speed toward the second air jet conveying section 42 by the compressed air flow.
Then, the filter material 10 passes through the insertion hole 50 of the inlet pipe 47, and the taper-shaped first inner peripheral surface 5 is formed.
By sliding on 0a and the second inner peripheral surface 50b having a cylindrical shape, it is converged to a diameter substantially equal to the diameter of the second inner peripheral surface and becomes a substantially cylindrical shape.

In the second air jet transfer section 42, a compressed air flow is supplied to the annular space 68 from the compressor 44 via the connection pipe 70, and the compressed air flow is supplied from the nozzle hole 67 to the filter material. It is jetted toward the downstream side in the transport direction. Therefore, the filter material 10 passing through the insertion holes 64 and 66 and the second guide pipe 74 is conveyed at high speed toward the molding device 20 by the compressed air flow.

In the second air jet transport section 42,
Since the inlet end of the insertion hole 64 of the inlet pipe 60 has a diameter larger than the diameter of the first guide pipe 72, the filter material 10 that has been focused into a substantially columnar shape is
When entering the insertion hole 64 from the first guide pipe 72,
Once expands radially outward. Then, the filter material 10
Slides on the tapered first inner peripheral surface 64a and the cylindrical second inner peripheral surface 64b while passing through the insertion hole 64 of the inlet pipe 60, so that the second inner peripheral surface again. It is focused into a cylindrical shape having a diameter approximately equal to the diameter of the surface. Then, the filter material 10 is the second guide pipe 7
4 is conveyed into the molding apparatus 20.

Since the inlet opening 20a of the molding device 20 is formed to be larger than the inner diameter of the second guide pipe 74, the filter material 10 once enters the molding device 20 from the second guide pipe. , Expands radially outward,
After that, it is finally molded into a desired cylindrical shape by a molding device.

As described above, at the inlet end of the second air jet transfer section 42 and the inlet end of the molding apparatus 20, the filter material 10 is once expanded and then refocused, so that the filter material is not distorted. It is molded into a cylindrical shape having no density and a substantially uniform density.

According to the filter carrying device 26 configured as described above, the filter material 10 can be carried to the molding device 20 at a high speed by the compressed air flow injected from the nozzle holes 56 and 67.

In particular, in the first air jet carrying section 40, since the plurality of annular grooves 52 are formed in the tapered first inner peripheral surface 50a of the insertion hole 50, the filter material 10 and the first inner surface 50a are formed. The contact with the inner peripheral surface 50a is intermittent.
Therefore, when the filter material 10 slides on the first inner peripheral surface 50a, it is possible to suppress the growth of dirt on the first inner peripheral surface 50a. As a result, the amount of dirt attached to the first inner peripheral surface 50a can be significantly reduced. Further, as a result of the experiment, the second inner peripheral surface 50 in which the annular groove is not formed
It was confirmed that the amount of stains was reduced for b.

Further, since the annular groove 52 is formed, the contact area between the first inner peripheral surface 50a and the filter material 10 is reduced. Therefore, in combination with the reduction of the amount of adhered dirt as described above, the transport resistance of the filter material when passing through the insertion hole 50 is reduced, and the transport force of the filter material can be increased. As a result, the addition device 14 and the filter transport device 2
It is possible to prevent the slack of the filter material 10 from occurring between 6 and 6. Therefore, the filter material 10 can be stably transported without changing the transfer amount, and the occurrence of cutting or winding of the filter material can be reliably prevented.
In addition, since the transportation state of the filter material 10 is stable,
In the cutting device 25, the indentation of the cut end of the filter plug can be reduced.

The present invention is not limited to the above-described embodiments, but can be variously modified within the scope of the present invention.

For example, if at least one annular groove 52 is formed on the tapered inner peripheral surface of the insertion hole, the effect of reducing dirt can be obtained, and the number and size of the annular grooves are different. Various changes can be made as necessary. Further, the groove formed on the tapered inner peripheral surface is preferably formed in an annular shape, but is not limited to this, and if it is formed so as to extend in the circumferential direction of the inner peripheral surface, it is completely continuous. It does not have to be circular.

In the above embodiment, the filter carrying device has the first and second air jet carrying parts 40 and 42, but the second air jet carrying part may be omitted. Further, in the second air jet carrying section 42, as in the case of the first air jet carrying section 40, a plurality of annular grooves may be formed in the tapered first inner peripheral surface 64a of the insertion hole 64. Good.

Further, the other mechanism and device of the cigarette filter manufacturing machine except the filter carrying device 26 have the same construction as the conventional one, and can be variously modified in carrying out the present invention.

[0048]

As described above in detail, the filter transport device of the present invention has a guide member having an insertion hole through which a band-shaped filter material is inserted, and a guide member for guiding the filter material toward the molding device, and the insertion hole. Compressed air supply means for supplying a compressed air flow to the filter material passing therethrough and moving the filter material toward the molding apparatus. The insertion hole has a tapered inner peripheral surface whose diameter is reduced toward the molding device, and a groove extending in the circumferential direction is formed on the inner peripheral surface of the insertion hole. Therefore, it is possible to suppress the growth of dirt on the inner peripheral surface of the insertion hole, significantly reduce the amount of adhered dirt on the inner peripheral surface, and reduce the transfer resistance of the filter material to increase the transfer force of the filter material. be able to. Therefore, it is possible to prevent the slack of the filter material and stably convey the filter material at a high speed.

[Brief description of drawings]

FIG. 1 is a side view schematically showing an entire cigarette filter manufacturing machine equipped with a filter transport device according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing the filter device.

FIG. 3 is an enlarged cross-sectional view showing a first air jet carrying section of the filter device.

[Explanation of symbols]

14 ... Addition device, 20 ... Molding device, 26 ... Filter transfer device, 40 ... First air jet transfer part, 42 ... Second air jet transfer part, 44 ... Compressor, 47 ... Inlet pipe (guide member), 50 ... Insertion hole, 50a ... 1st inner peripheral surface, 50b ... 2nd inner peripheral surface, 52 ... Annular groove, 56 ...
Nozzle hole, 60 ... Inlet pipe (second guide member), 64 ... Insertion hole (second insertion hole).

Claims (5)

[Claims] 1. A filter carrying device of a cigarette filter manufacturing machine for carrying a band-shaped filter material to which an additive is added toward a molding device, wherein the filter material has an insertion hole through which the filter material is inserted. A guide member for guiding toward the molding device; and a compressed air supply means for supplying a compressed air flow to the filter material passing through the insertion hole to move the filter material toward the molding device. A filter transfer device having a tapered inner peripheral surface whose diameter is reduced toward a molding device, and a groove extending in a circumferential direction is formed on the inner peripheral surface of the insertion hole. 2. The filter transfer device according to claim 1, wherein the groove is formed in an annular shape coaxial with the insertion hole. 3. The guide member has a plurality of annular grooves formed on the inner peripheral surface of the insertion hole, the annular groove being formed coaxially with the insertion hole, and in the axial direction of the insertion hole. The filter transport device according to claim 1, wherein the filter transport device is formed so as to be separated from each other along the direction. 4. The filter carrying device according to claim 3, wherein the plurality of annular grooves have diameters which are substantially equal to each other. 5. A second guide member is provided between the guide member and a molding device, the second guide member extending substantially coaxially with the insertion hole and the insertion hole. Has a second insertion hole through which the filter material sent from is inserted, and the second insertion hole has a tapered inner peripheral surface whose diameter is reduced toward the molding device, and the compressed air supply means is provided. The filter transport device according to claim 1, further comprising means for supplying a compressed air flow to the filter material passing through the second insertion hole.