JP5545941B2 - Dust collecting device and cutting device having the device - Google Patents

Description

  The present invention relates to a device for collecting dust generated when cutting a sheet material such as paper or plastic film, and a cutting device having the device, and in particular, is attached to the cut end portion of the cut sheet material or its periphery. Dust such as cutting waste can be effectively removed.

  Conventionally, for example, in a paper mill or a plastic film factory, a long sheet material made of paper or plastic is cut in the width direction to finish it into a short flat sheet, or cut in the length direction of the sheet material. Finished with a narrow sheet material. In addition, since dust such as cutting waste is generated during cutting, an apparatus for collecting the dust is used.

  As a collection device for dust generated at the time of cutting, for example, a dust collection device disclosed in Patent Document 1 is known. The dust collecting device of Patent Document 1 is attached to the surface of a sheet material by blowing air (process air) onto the surface of the cut sheet material and guiding the air flow to the air recovery unit by the Coanda effect. It is to collect the dust.

  However, according to the conventional dust collecting device disclosed in Patent Document 1, as described above, air is blown to the surface of the cut sheet material, and the air flow is guided to the air recovery unit by the Coanda effect. Therefore, the dust attached to the surface of the cut sheet material can be removed, but the dust attached to the cut end surface of the cut sheet material cannot be effectively removed, and it is a defective product containing dust. The problem that occurs is not completely solved.

  When dust on the cut end face that has not been removed as described above reattaches to the surface of the sheet material, when printing is performed on the surface of the sheet material, the portion of the dust becomes spotless white spots, etc. Printing failure occurs. In addition, if dust on the cut end face reattaches to, for example, an ink discharge nozzle of an ink jet printing machine, a problem such as printing failure due to clogging of the ink discharge nozzle occurs.

JP 2006-26752 A

  The present invention has been made to solve the above-described problems, and the object of the present invention is to effectively remove dust such as cutting waste adhering to the cutting end surface of the cut sheet material and its periphery. The object is to provide a dust collecting device and a cutting device having the device.

In order to solve the above problems, the present invention is installed downstream of the cutting unit for cutting the sheet material in the cutting blade, the dust adhering to the sheet material by cutting in the cutting portion remote from the cutting portion A dust collecting device for collecting downstream , wherein the dust collecting device includes a contact member that contacts one surface of the cut sheet material downstream of the cutting portion, and the sheet material contact surface of the contact member. A suction port for sucking the dust, provided at a position corresponding to a cutting position of the cutting portion of the sheet material , wherein the contact member is a cylindrical roll, and an outer peripheral surface of the cylindrical roll is the sheet It is a material contact surface .

The cylindrical roll has a plurality of suction holes formed in a radial direction of the cylindrical roll, one end of which faces the suction port and the other end connected to the suction means, and the suction means is arranged on the inner side of the cylindrical roll. A fixed suction cylinder disposed on the suction cylinder, a suction box that is integrally provided on the outer peripheral surface of the suction cylinder and that is in sliding contact with the inner peripheral surface of the cylindrical roll, and the other end of the suction hole faces the interior; and the suction A communication hole that communicates and connects the inside of the cylinder and the suction box can be provided. Further, the outer peripheral surface of the cylindrical roll, the position corresponding to the cutting position of the sheet material, an annular groove is plurally formed, the upper opening of these annular grooves is configured to function as the suction port be able to.

  A cutting device having the dust collecting device is also included in the present invention.

In the present invention, as described above, it is installed downstream of the cutting part that cuts the sheet material with the cutting blade, and the dust adhering to the sheet material by the cutting at the cutting part is separated from the cutting part downstream. A dust collecting device for collecting, wherein the dust collecting device includes a contact member that contacts one surface of the cut sheet material downstream of the cutting portion, and the sheet material of the sheet material contact surface of the contact member. A suction port for sucking the dust, provided at a position corresponding to the cutting position of the cutting portion, and the contact member comprises a cylindrical roll, and the outer peripheral surface of the cylindrical roll is in contact with the sheet material Adopted the composition that is facing . For this reason, the cutting edge of the sheet material is forcibly sucked into the suction port by the suction force of the suction port, and dust such as cutting scraps adhering to the cutting end surface of the sheet material and its periphery is effective. Is aspirated and removed. Accordingly, it is possible to obtain the effects such as the generation of defective products due to the adhesion of dust and the reduction of printing defects due to dust.

The front view of the cutting device principal part to which the dust collection device which is one embodiment of the present invention is applied. The expanded sectional view of the dust collection device shown in FIG. Explanatory drawing of the positional relationship of the cutting position of a sheet material with a cutting blade, and a suction port. Explanatory drawing of the cutting operation | movement by a cutting blade. The AA cross-sectional enlarged view of FIG. The perspective view of the dust collection apparatus which is other embodiment of this invention.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a front view of a main part of a cutting apparatus to which a dust collecting apparatus according to an embodiment of the present invention is applied. FIG. 2 is an enlarged sectional view of the dust collecting apparatus shown in FIG. FIG. 4 is an explanatory view of a cutting operation by a cutting blade, FIG. 5 is an AA cross-sectional enlarged view of FIG. 2, and FIG. 6 is another embodiment of the present invention. It is a perspective view of the dust collection device which is.

<Outline of cutting device>
The cutting apparatus M of FIG. 1 includes a transfer means 1 for transferring a continuous long sheet material S, a cutting portion 2 provided in the middle of a transfer path of the sheet material S, and a cutting portion 2 of the sheet material transfer path. And a dust collecting device 3 installed downstream.

<Details of transfer means>
The transport means 1 feeds the sheet material S from a feed roll (not shown) in which a roll of the sheet material S is set, and transports the sheet material S to the cutting unit 2 and the sheet material S cut by the cutting unit 2. A guide roll 12 for guiding to a winding roll (not shown) is provided.

<Details of cutting section>
The cutting part 2 is located between the nip roll 11 and the second guide roll 12, and has a pair of cutting blades 20 and 21 that face each other up and down across the sheet material transfer path. Each of the pair of cutting blades 20 and 21 is a circular blade, and a plurality of the cutting blades 20 and 21 are arranged at a predetermined pitch in the width direction of the sheet material S (direction perpendicular to the transfer direction F of the sheet material S) (FIG. 3). reference).

  The cutting blades 20 and 21 individually have drive shafts AX1 and AX2 that are orthogonal to the sheet material S transfer direction F, and the lower cutting blade 20 is attached to the outer periphery of the drive shaft AX1. The drive shaft AX1 is rotationally driven around the drive shaft AX1. Similarly, the upper cutting blade 21 is attached to the outer periphery of the drive shaft AX2 so as to be driven to rotate about the drive shaft AX2. Then, the cutting edges 20 and 21 of the cutting blades 20 and 21 rub against each other and rotate as shown in FIG. 4, whereby the sheet material S is cut along its length direction to become a small width sheet material.

<Details of dust collector>
As shown in FIG. 2, the dust collecting device 3 includes a contact member 4 that contacts one side of the cut sheet material S, and the sheet material contact surface 4 </ b> A of the contact member 4 has the sheet material S of the contact material 4. A suction port 5 for sucking dust is provided at a position corresponding to the cutting position P (see FIG. 3).

  As a specific configuration of the contact member 4, the dust collection device 3 employs a cylindrical roll 40 that is rotatably supported by a drive shaft AX <b> 3 (see FIG. 3) orthogonal to the transfer direction F of the sheet material S, The outer peripheral surface of the cylindrical roll 40 is configured as a sheet material contact surface 4A so that the cut sheet material S passes while contacting.

  As shown in FIG. 3, a plurality of annular grooves 41 (see FIG. 5) are formed on the outer peripheral surface (sheet material contact surface 4A) of the cylindrical roll 40 at a position corresponding to the cutting position P of the sheet material S. is there. A suction hole 42 is formed at the bottom of the annular groove 41, and the suction hole 42 of the cylindrical roll 40 is connected to a suction box 45 of the suction means 43 of FIG. The upper opening of the annular groove 41 functions as the suction port 5. The annular groove 41 is preferably provided at a pitch that matches the pitch of the cutting edge of the lower blade (lower cutting blade 20). The suction hole 42 is preferably provided so as to occupy 5 to 90% of the circumferential area of one annular groove 41, and more preferably 10 to 60%. If it is less than 5%, the entire suction force may be insufficient, and if it exceeds 90%, the suction force is dispersed. Therefore, the suction force of one suction hole 42 may be weakened.

  The suction means 43 in FIG. 2 is a means for generating a suction force at the suction port 5. Specifically, the suction means 43 is attached to a frame or the like (not shown) and is disposed on the inside of the cylindrical roll 40. The suction box 45 that is integrally provided on the outer peripheral surface of the suction cylinder 44 and that is in sliding contact with the inner peripheral surface of the cylindrical roll 40, the communication hole 46 that connects the suction cylinder 44 and the suction box 45 in communication, and the suction cylinder 44 And a suction machine (not shown) comprising a known suction blower or the like connected to one end via a suction hose (not shown).

  The suction force of the suction machine acts on the suction port 5 (the upper opening of the annular groove 41) through the suction hose, the suction cylinder 44, the communication hole 46, the suction box 45, and the suction hole 42, The suction port 5 can suck air and dust in the air.

  In particular, in the present dust collection device 3, the suction force is concentrated without waste on the entire outer peripheral surface (sheet material contact surface 4 </ b> A) of the cylindrical roll 40 in the range where the sheet material S actually contacts (effective contact range C). 2, the suction hole 42 of the cylindrical roll 40 and the suction box 45 are connected in communication within the effective contact range C by adjusting the installation position of the suction box 45 in the cylindrical roll 40 as shown in FIG. It is.

<Description of operation of cutting device>
Next, the operation of the cutting apparatus M of FIG. 1 configured as described above will be described with reference to FIG.

  In the cutting apparatus M of FIG. 1, when a start switch (not shown) is turned on, the pair of cutting blades 20 and 21 are rotated, and the sheet material S is fed from a feed roll (not shown) by the drive roll 10. It is cut when passing between the pair of rotating cutting blades 20 and 21. The cut sheet material S travels about a half circumference around the outer peripheral surface (sheet material contact surface 4A) of the cylindrical roll 40 (contact member 4) and proceeds to the guide roll 12, and is finally not shown via the guide roll 12. It is wound up by a winding roll.

  Dust D such as cutting waste generated from the sheet material S at the time of cutting may adhere to the cutting end surface of the sheet material S cut as shown in FIG. When the cut end portion of the cut sheet material S passes through the outer peripheral surface (sheet material contact surface 4A) of the cylindrical roll 40 (contact member 4), it is forcibly as shown in FIG. Is sucked into the suction port 5 and hangs down into the suction port 5, so that the dust D adhering to the cut end surface of the sheet material S and the periphery thereof is effectively sucked from the suction port 5 toward the suction hole 42. It is.

  FIG. 6 is a perspective view of a dust collecting apparatus according to another embodiment of the present invention.

  In the dust collecting device 3 of FIG. 6, as a specific configuration of the contact member 4, a fixed suction nozzle 48 attached to a frame (not shown) is adopted, and the nozzle tip surface is cut as a sheet material contact surface 4A. The configured sheet material S is configured to pass while contacting.

  The plurality of suction ports 5 on the nozzle tip surface (sheet material contact surface 4A) are also provided at positions corresponding to the cutting position P of the sheet material S, similarly to the suction ports 5 of the dust collecting device 3 in FIG. . The suction nozzle 48 is connected to a suction machine (not shown) via a suction hose (not shown), and the suction force of the suction machine acts on the suction port 5 on the nozzle tip surface via the suction hose. Accordingly, the suction port 5 on the nozzle front end surface can suck dust adhering to the cut end surface of the sheet material S and its periphery.

  Also in the dust collecting device 3 of FIG. 6, when the cut end portion of the cut sheet material S passes through the nozzle tip surface (sheet material contact surface 4A) of the suction nozzle 48 (contact member 4), Since it is forcibly sucked into the suction port 5 by the suction force of the suction port 5 on the tip end surface of the nozzle and hangs down into the suction port 5, the cutting end surface of the sheet material S and its surroundings are the same as in the dust collecting device 3 of FIG. The dust D adhering to is effectively sucked into the suction port 5.

  In the dust collection device 3 of FIG. 2, the configuration in which the cylindrical roll 40 rotates is adopted, but the cylindrical roll 40 may be of a type fixed at the position of FIG.

C Effective contact range M Cutting device S Sheet material F Sheet material transfer direction 1 Transfer means 10 Drive roll 11 Nip roll 12 Guide roll 2 Cutting portions 20, 21 Cutting blade 3 Dust collecting device 4 Contact member 4A Sheet material contact surface 40 Cylinder Roll 41 Annular groove 42 Suction hole 43 Suction means 44 Suction cylinder 45 Suction box 46 Communication path 48 Suction nozzle

Claims (3)

A dust collecting device that is installed downstream of a cutting portion that cuts the sheet material with a cutting blade, and that collects dust attached to the sheet material by cutting at the cutting portion downstream from the cutting portion ,
The dust collector is
A contact member that contacts one side of the cut sheet material downstream of the cut portion ;
A suction port for sucking the dust, provided at a position corresponding to a cutting position in the cutting portion of the sheet material on the sheet material contact surface of the contact member ;
Comprising
The contact member comprises a cylindrical roll;
The dust collecting apparatus, wherein an outer peripheral surface of the cylindrical roll is the sheet material contact surface . The cylindrical roll is
One end faces the suction port, and the other end has a plurality of suction holes formed in the radial direction of the cylindrical roll connected to the suction means,
The suction means is
A fixed suction cylinder disposed inside the cylindrical roll;
A suction box which is integrally provided on the outer peripheral surface of the suction cylinder and slidably contacts the inner peripheral surface of the cylindrical roll, and the other end of the suction hole faces the inside;
A communication hole for communicating and connecting the inside of the suction cylinder and the suction box;
The dust collecting apparatus according to claim 1, comprising: A cutting device comprising the dust collecting device according to claim 1 .

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