JP6405724B2 - Resin film processing equipment - Google Patents

Description

  The present invention relates to a resin film processing apparatus.

  In some fruits and vegetables, a resin film is formed in a bag shape and packaged in the bag body. A plurality of holes are formed in the resin film. From this hole, the respiration rate of the fruits and vegetables themselves is adjusted, and the freshness of the fruits and vegetables is maintained.

  An apparatus for forming a plurality of holes in a resin film is conventionally known (see, for example, Patent Document 1). The apparatus described in Patent Document 1 includes a plurality of rollers that rotate while a resin film is wound around, and a laser light irradiation unit that forms a hole by irradiating the resin film with laser light during conveyance of the resin film. I have.

  However, in the apparatus described in Patent Document 1, the resin film is mainly pulled in the transport direction, but the tension in the direction orthogonal to the transport direction, that is, the longitudinal direction of the roller is insufficient. In this case, the position of the resin film with respect to the roller is displaced due to wrinkles in the resin film, and if the hole is formed in this state, the hole is not formed at an accurate position or the size of the hole varies. It will occur.

JP 2008-272833 A

  The objective of this invention is providing the resin film processing apparatus which can form a hole stably in a resin film.

Such an object is achieved by the present inventions (1) to (11) below.
(1) It is a conveying means for conveying a long resin film along its longitudinal direction, the outer shape is cylindrical, and the middle of the resin film is in contact with the outer periphery thereof, Conveying means having a plurality of rollers that rotate while being wound around;
A hole forming unit having a laser beam irradiation unit that forms a hole in the irradiated part by irradiating the resin film in the middle of being conveyed by the conveying unit with a laser beam;
At least one of the plurality of rollers is disposed to face the laser beam irradiation unit, and at least one roller formed on the outer peripheral portion of the roller along a direction orthogonal to the longitudinal direction thereof. A first groove;
At least one second groove formed to be inclined with respect to the longitudinal direction from a central portion in the longitudinal direction of the outer peripheral portion to one end side;
The other end portion from the central portion of the outer peripheral portion, have a said second groove and at least one third groove formed symmetrically inclined with respect to said central portion,
A plurality of the first grooves are formed at intervals along the longitudinal direction,
Each of the second groove and the third groove is disposed between the first grooves adjacent to each other in the longitudinal direction, and is not in communication with the first groove. Resin film processing equipment.

(2) Conveying means for conveying a long resin film along its longitudinal direction, the outer shape of which is cylindrical, and the middle of the resin film in the longitudinal direction is in contact with its outer peripheral part, Conveying means having a plurality of rollers that rotate while being wound around;
A hole forming unit having a laser beam irradiation unit that forms a hole in the irradiated part by irradiating the resin film in the middle of being conveyed by the conveying unit with a laser beam;
At least one of the plurality of rollers is disposed to face the laser beam irradiation unit, and at least one roller formed on the outer peripheral portion of the roller along a direction orthogonal to the longitudinal direction thereof. A first groove;
At least one second groove formed to be inclined with respect to the longitudinal direction from a central portion in the longitudinal direction of the outer peripheral portion to one end side;
At least one third groove formed symmetrically with respect to the second groove with respect to the central portion at a portion on the other end side from the central portion of the outer peripheral portion,
A plurality of the first grooves are formed at intervals along the longitudinal direction,
Each of the second groove and the third groove is disposed between the first grooves adjacent to each other in the longitudinal direction, and communicates with the first groove. Resin film processing equipment.

(3) Each of the second grooves has the same inclination angle with respect to the longitudinal direction,
Each said 3rd groove | channel is a resin film processing apparatus as described in said (1) or (2) whose inclination | tilt angle with respect to the said longitudinal direction is respectively the same.

(4) The second grooves adjacent to each other in the longitudinal direction have different inclination angles with respect to the longitudinal direction,
Said 3rd groove | channel adjacent to the said longitudinal direction is a resin film processing apparatus as described in said (3) from which the inclination angle with respect to the said longitudinal direction differs.

(5) Of the second grooves adjacent to each other in the longitudinal direction, the inclination angle of the second groove located on the center side is greater than the inclination angle of the second groove located on the one end side. Big
Among the third grooves adjacent to each other in the longitudinal direction, the inclination angle of the third groove located on the center side is larger than the inclination angle of the third groove located on the other end side. The resin film processing apparatus as described in said (4).

(6) Of the second grooves adjacent to each other in the longitudinal direction, the inclination angle of the second groove located on the center side is greater than the inclination angle of the second groove located on the one end side. Is also small,
Among the third grooves adjacent to each other in the longitudinal direction, the inclination angle of the third groove located on the center side is smaller than the inclination angle of the third groove located on the other end side. The resin film processing apparatus as described in said (4).

(7) Conveying means for transporting a long resin film along its longitudinal direction, the outer shape of which is cylindrical, and the middle of the resin film in the longitudinal direction is in contact with its outer peripheral part, Conveying means having a plurality of rollers that rotate while being wound around;
A hole forming unit having a laser beam irradiation unit that forms a hole in the irradiated part by irradiating the resin film in the middle of being conveyed by the conveying unit with a laser beam;
At least one of the plurality of rollers is disposed to face the laser beam irradiation unit, and at least one roller formed on the outer peripheral portion of the roller along a direction orthogonal to the longitudinal direction thereof. A first groove;
At least one second groove formed to be inclined with respect to the longitudinal direction from a central portion in the longitudinal direction of the outer peripheral portion to one end side;
At least one third groove formed symmetrically with respect to the second groove with respect to the central portion at a portion on the other end side from the central portion of the outer peripheral portion,
The resin film processing apparatus, wherein each of the second groove and the third groove has a depth shallower than that of the first groove.

(8) Conveying means for conveying a long resin film along its longitudinal direction, the outer shape of which is cylindrical, and the middle of the resin film in the longitudinal direction contacts the outer periphery thereof, Conveying means having a plurality of rollers that rotate while being wound around;
A hole forming unit having a laser beam irradiation unit that forms a hole in the irradiated part by irradiating the resin film in the middle of being conveyed by the conveying unit with a laser beam;
At least one of the plurality of rollers is disposed to face the laser beam irradiation unit, and at least one roller formed on the outer peripheral portion of the roller along a direction orthogonal to the longitudinal direction thereof. A first groove;
At least one second groove formed to be inclined with respect to the longitudinal direction from a central portion in the longitudinal direction of the outer peripheral portion to one end side;
At least one third groove formed symmetrically with respect to the second groove with respect to the central portion at a portion on the other end side from the central portion of the outer peripheral portion,
The resin film processing apparatus according to claim 1, wherein the first groove has a width changing portion whose width changes along a direction in which the first groove is formed.

(9) On the first groove, the hole is formed in the resin film,
The second groove has a function of applying tension from the central portion to the one end side with respect to the resin film,
The said 3rd groove | channel is a resin film processing apparatus in any one of said (1) thru | or (8) which has a function which provides the tension | tensile_strength from the said center part to the said other end side with respect to the said resin film.

(10) The resin film processing apparatus according to any one of (1) to (9), wherein each of the second groove and the third groove has a spiral shape.

(11) The resin film is made of a thermoplastic resin,
The resin film processing apparatus according to any one of (1) to (10), wherein the laser light emitted by the laser light irradiation unit is CO ₂ laser light.

  According to the present invention, during the conveyance of the resin film, in addition to being able to pull the resin film in the conveyance direction, the resin film can also be pulled in the direction orthogonal to the conveyance direction, that is, in the longitudinal direction of the roller. Thereby, when forming a hole in a resin film, the formation can be performed stably.

FIG. 1 is a front view showing a first embodiment of a resin film processing apparatus of the present invention. FIG. 2 is a front view showing a state in which the holding angle adjusting mechanism is operated from the state shown in FIG. FIG. 3 is a cross-sectional view showing a state in which holes are formed in the resin film by the resin film processing apparatus shown in FIG. 4 is a plan view of a grooved roller provided in the resin film processing apparatus shown in FIG. FIG. 5 is an enlarged view of a region [A] surrounded by a one-dot chain line in FIG. FIG. 6 is a front view of a holding angle adjusting mechanism provided in the resin film processing apparatus shown in FIG. 1. FIG. 7 is a block diagram of the main part of the resin film processing apparatus shown in FIG. FIG. 8 is a graph showing the relationship between the conveyance speed and the holding angle. FIG. 9 is a graph showing the relationship between the resin film thickness and the holding angle in the resin film processing apparatus (second embodiment) of the present invention. FIG. 10 is a graph showing the relationship between the elongation rate of the resin film and the holding angle in the resin film processing apparatus (third embodiment) of the present invention. FIG. 11: is a front view which shows 4th Embodiment of the resin film processing apparatus of this invention. 12 is a cross-sectional view showing a state in which holes are formed in the resin film by the resin film processing apparatus shown in FIG. FIG. 13 is a cross-sectional view showing a state in which holes are formed in the resin film by the resin film processing apparatus shown in FIG. FIG. 14 is a plan view of a grooved roller provided in the resin film processing apparatus (fifth embodiment) of the present invention. FIG. 15 is a plan view of a grooved roller provided in the resin film processing apparatus (sixth embodiment) of the present invention. FIG. 16 is a plan view of a grooved roller provided in the resin film processing apparatus (seventh embodiment) of the present invention. FIG. 17 is an enlarged plan view of a grooved roller provided in the resin film processing apparatus (eighth embodiment) of the present invention. FIG. 18 is a diagram sequentially illustrating a process of manufacturing a packaging bag from a resin film processed by the resin film processing apparatus illustrated in FIG. 1. FIG. 19 is a perspective view showing another configuration example of a resin film that can be processed by the resin film processing apparatus shown in FIG. 1. 20 is a cross-sectional view taken along line BB in FIG.

  Hereinafter, the resin film processing apparatus of this invention is demonstrated in detail based on suitable embodiment shown to an accompanying drawing.

<First Embodiment>
FIG. 1 is a front view showing a first embodiment of a resin film processing apparatus of the present invention. FIG. 2 is a front view showing a state in which the holding angle adjusting mechanism is operated from the state shown in FIG. FIG. 3 is a cross-sectional view showing a state in which holes are formed in the resin film by the resin film processing apparatus shown in FIG. 4 is a plan view of a grooved roller provided in the resin film processing apparatus shown in FIG. FIG. 5 is an enlarged view of a region [A] surrounded by a one-dot chain line in FIG. FIG. 6 is a front view of a holding angle adjusting mechanism provided in the resin film processing apparatus shown in FIG. 1. FIG. 7 is a block diagram of the main part of the resin film processing apparatus shown in FIG. FIG. 8 is a graph showing the relationship between the conveyance speed and the holding angle. FIG. 18 is a diagram sequentially illustrating a process of manufacturing a packaging bag from a resin film processed by the resin film processing apparatus illustrated in FIG. 1. FIG. 19 is a perspective view showing another configuration example of a resin film that can be processed by the resin film processing apparatus shown in FIG. 1. 20 is a cross-sectional view taken along line BB in FIG. In the following, for convenience of explanation, the upper side in FIGS. 1 to 3 and 6 (the same applies to FIGS. 11 to 13) is “upper” or “upper”, and the lower side is “lower” or “lower”. The left side is called “left” and the right side is called “right”. In FIG. 4 (the same applies to FIGS. 14 to 16), the left side is referred to as “left” and the right side is referred to as “right”.

  A resin film processing apparatus (hereinafter simply referred to as “processing apparatus”) 1 shown in FIGS. 1 and 2 is an apparatus that performs processing for forming a large number of holes 201 in a resin film 20. The processing apparatus 1 includes a conveying unit 2 that conveys the resin film 20, a hole forming unit 3 that forms a hole 201 in the resin film 20, and a control unit 10 that controls these operations. Before describing the configuration of each part of the processing apparatus 1, the resin film 20 will be described.

  The resin film 20 has a long shape, that is, a belt shape, and is wound in a roll shape before being processed. After the processing is performed, the resin film 20 is stretched while being processed. It is wound into a roll again.

  As shown in FIG. 18, in the present embodiment, a large number of holes 201 are formed in the resin film 20, and the arrangement mode is arranged at equal intervals along the longitudinal direction of the resin film 20. Four are arranged at equal intervals. In addition, the space | interval along a longitudinal direction and the space | interval along the width direction may be the same, and may differ.

  The resin film 20 is made of a thermoplastic resin. Examples of the thermoplastic resin include polyolefins such as polyethylene, polypropylene, and ethylene-vinyl acetate copolymer, modified polyolefins, and polyamides (example: nylon 6, nylon 46). , Nylon 66, Nylon 610, Nylon 612, Nylon 11, Nylon 12, Nylon 6-12, Nylon 6-66), Thermoplastic polyimide, Aromatic polyester and other liquid crystal polymers, Polyphenylene oxide, Polyphenylene sulfide, Polycarbonate, Polymethyl methacrylate , Polyether, polyether ether ketone, polyether imide, polyacetal, styrene, polyolefin, polyvinyl chloride, polyurethane, polyester such as polyethyl lactate, Various thermoplastic elastomers such as amide, polybutadiene, trans polyisoprene, fluoro rubber, chlorinated polyethylene such as polyvinyl chloride and polyvinylidene chloride, or copolymers, blends, and polymers mainly composed of these An alloy etc. are mentioned, The 1 type (s) or 2 or more types of these can be mixed and used. In addition, paper, unemployed cloth, etc. may be mixed.

  The resin film 20 may be a single layer or a laminate in which a plurality of layers are laminated.

  As shown in FIG. 18, when the resin film 20 is processed, it becomes a resin film 20 </ b> A with holes in which holes 201 are formed. The resin film with holes 20A is cut into a predetermined length, and becomes a packaging bag 20C for packaging food such as fruits and vegetables. A manufacturing process until the resin film 20A with a hole becomes the packaging bag 20C will be described.

  As shown in FIG. 18A, the resin film 20A with holes is stretched and cut into a predetermined length using, for example, scissors or a cutter. This cut is the base material 20B of the packaging bag 20C (see FIG. 18B).

  Next, as shown in FIG. 18 (c), the center part in the width direction of the base material 20 </ b> B is bent as a bent part 202.

Then, for example, the edges are fused (thermal fusion, high frequency fusion, ultrasonic fusion, etc.) so that the base material 20B has a bag shape, and the packaging bag 20C shown in FIG. 18D is obtained. In the packaging bag 20C, six holes 201 are arranged in a matrix of 3 rows and 2 columns on the front side, and six holes 201 are arranged in a matrix of 3 rows and 2 columns on the back side. The fruits and vegetables packaged in the packaging bag 20 </ b> C have their own respiration rate adjusted through the holes 201, and the freshness is maintained.
The machining apparatus 1 is used to perform such hole machining.

  Next, the structure of each part of the processing apparatus 1 will be described. As described above, the processing apparatus 1 includes the transport unit 2, the hole forming unit 3, and the control unit 10.

  As shown in FIG. 1 (the same applies to FIG. 2), the transport means 2 transports the resin film 20 along its longitudinal direction. The conveying means 2 includes a grooved roller 21 having a first groove 212, a second groove 215, and a third groove 216, and a conveying direction of the resin film 20 with respect to the grooved roller 21 (hereinafter simply referred to as “conveying direction”). The tensioners 22, 23, 24, and 25 are disposed on the upstream side, and the tensioners 26, 27, 28, and 29 are disposed on the downstream side in the conveyance direction with respect to the grooved roller 21. Each roller is preferably made of a metal material such as stainless steel. In addition, the central axes (rotating shafts) 214 of these rollers are oriented in the same direction and are spaced apart from each other. The rollers excluding the tensioners 25 and 26 are rotatably supported by, for example, a frame (not shown) that supports the entire processing apparatus 1.

  The grooved roller 21 is a roller that rotates while being wound around a part of the outer peripheral portion 211 that is in contact with the middle of the resin film 20 in the longitudinal direction.

  Similarly to the grooved roller 21, the tensioners 22 to 29 are also rollers that rotate while being wound around by contacting the middle of the resin film 20 in the longitudinal direction. Thereby, the resin film 20 can be transported while applying tension to the resin film 20 in the transport direction. In the configuration shown in FIG. 1, the tensioner 22 and the tensioner 29 are arranged symmetrically with respect to the grooved roller 21, the tensioner 23 and the tensioner 28 are arranged symmetrically with respect to the grooved roller 21, and the tensioner 24 and the tensioner 27 are arranged. The grooved roller 21 is arranged symmetrically, and the tensioner 25 and the tensioner 26 are arranged symmetrically with respect to the grooved roller 21.

  Further, on the most upstream side in the transport direction, the resin film 20 in which the holes 201 are not yet formed is wound in a roll shape. And this resin film 20 can be sent out to a conveyance direction.

  On the other hand, on the most downstream side in the transport direction, the resin film 20 in which the hole 201 is formed can be taken up, and the motor 11 is connected to the take-up roller. The resin film 20 can be conveyed by the operation of the motor 11.

  Moreover, the conveyance speed v of the resin film 20 can also be changed by changing the magnitude of the voltage applied to the motor 11. Thereby, the time for which the laser beam L strikes the resin film 20 can be adjusted, and thus the shape and size of the hole 201 can be changed.

  The hole forming unit 3 includes a laser beam irradiation unit 31 that irradiates the laser beam L. The laser beam irradiation unit 31 is disposed above the grooved roller 21 so as to face the grooved roller 21, and is supported and fixed to the frame that supports the entire processing apparatus 1.

  Further, in the laser beam irradiation unit 31, the irradiation port 311 for irradiating the laser beam L faces each first groove 212. Then, as shown in FIG. 3, the contact portion 203 that is wound around the roller 21 with the groove 21 of the resin film 20 that is being conveyed can be irradiated with the laser beam L. Thereby, the contact portion 203 is melted to form the holes 201 on the first grooves 212, respectively. Moreover, although the micro piece arises because the contact part 203 melt | dissolved, this micro piece is discharged | emitted from the 1st groove | channel 212, a part or all volatilizing.

Further, the laser beam L irradiated by the laser beam irradiation unit 31 is appropriately selected according to the constituent material of the resin film 20, and for example, a far infrared laser beam such as a CO ₂ laser beam or a near infrared beam such as an Nd-YAG laser beam. laser light, including but excimer laser beam, when the material of the resin film 20 is a thermoplastic resin, is preferably a CO ₂ laser beam. The CO ₂ laser light preferably has a wavelength of about 9.2 to 10.8 μm, and more preferably 9.4 to 10.6 μm. The wavelength to be used can be selected and determined as appropriate in consideration of the transmittance of the resin film 20. Further, the CO ₂ laser light is far-infrared, and is obtained, for example, by exciting a tube filled with a CO ₂ mixed gas with high frequency and high voltage, and is formed in the hole 201 in the resin film 20 made of a thermoplastic resin. Can be formed easily and reliably.

  As shown in FIG. 7, the control means 10 is electrically connected to the conveying means 2, the hole forming means 3, and the like, and has a function of controlling these operations. The control means 10 has a CPU (Central Processing Unit) 101 and a memory 102.

  The CPU 101 can execute programs for various processes such as a process for performing hole processing on the resin film 20.

  The memory 102 is, for example, a flash memory, and can store various programs.

  In the processing apparatus 1, the higher the conveyance speed v, the more the air is entrained (entered) between the resin film 20 and each roller during the conveyance of the resin film 20, and the resin film undulates. There was a risk of fluttering. In particular, when such a wavy state (hereinafter referred to as “waved state”) occurs between the resin film 20 and the grooved roller 21 when forming the hole 201, the size of the formed hole 201. Phenomena such as fluctuations occur. Therefore, the processing apparatus 1 has an effective configuration for eliminating such a phenomenon. This will be described below.

  As shown in FIGS. 1 and 2, the conveying means 2 can adjust the holding angle (holding angle) θ of the contact portion 203 with respect to the grooved roller 21 of the resin film 20, and as a mechanism for the adjustment A holding angle adjusting mechanism 4 is installed. Here, the “holding angle” refers to the upstream end 203a located on the most upstream side in the conveying direction, the downstream end 203b located on the most downstream side in the conveying direction, and the grooved roller 21 in the direction of the central axis 214. It is an angle formed with the center 213 when viewed from above. That is, the “holding angle” is a central angle of the arc when the contact portion 203 is a circular arc.

  As shown in FIG. 6, the holding angle adjusting mechanism 4 includes tensioners 25 and 26 as holding angle adjusting rollers, and a moving support mechanism 41 that supports the tensioners 25 and 26 so as to be movable in the vertical direction. .

  As described above, the tensioner 25 and the tensioner 26 are disposed symmetrically with respect to the grooved roller 21. That is, the tensioner 25 is disposed adjacent to the grooved roller 21 on the upstream side in the conveyance direction, and the tensioner 26 is disposed adjacent to the grooved roller 21 on the downstream side in the conveyance direction.

  The movement support mechanism 41 is a mechanism that supports the tensioners 25 and 26 so as to be movable in the vertical direction, that is, in a direction crossing the transport direction. As shown in FIG. 6, the movement support mechanism 41 includes a motor 42, a coupling 43, a ball screw 44, a linear guide 45, and a connecting member 46.

  The motor 42 is, for example, a servo motor or a stepping motor, and is fixed to the frame.

  The ball screw 44 includes a screw shaft 441, a nut 442, and a large number of spheres (not shown) that slide between them. The lower end of the screw shaft 441 is connected to the motor 42 via the coupling 43. The upper end portion of the screw shaft 441 is supported by the frame.

  The linear guide 45 includes a rail member 451, a slide member 452, and a large number of spheres (not shown) that slide between them. The rail member 451 is supported and fixed to the frame along the vertical direction, that is, parallel to the ball screw 44.

  The connecting member 46 is a long rigid member that connects the tensioner 25 and the tensioner 26. The tensioner 25 is rotatably supported at the left end 461 of the connecting member 46, and the tensioner 26 is rotatably supported at the right end 462. Further, the connecting member 46 is fixed to the nut 442 of the ball screw 44 and the slide member 452 of the linear guide 45, for example, via bolts, in the vicinity of the center in the longitudinal direction.

  In the moving support mechanism 41 configured as described above, the screw shaft 441 of the ball screw 44 rotates as the motor 42 rotates. Then, the rotational motion is converted into a linear motion between the screw shaft 441 and the nut 442, and the connecting member 46 can move together with the tensioners 25 and 26 vertically upward. Further, when the motor 42 rotates in the opposite direction, the connecting member 46 can move vertically downward together with the tensioners 25 and 26. Thus, the movement support mechanism 41 can move the tensioners 25 and 26 together in the same direction.

  When the holding angle adjusting mechanism 4 is operated, that is, when the tensioners 25 and 26 are displaced from the state shown in FIG. 1 to the state shown in FIG. 2 by the moving support mechanism 41, the resin film 20 (contact portion 203) and the groove The contact area with the attached roller 21 increases, and as a result, the holding angle θ also increases. As the holding angle θ increases, the degree of close contact between the contact portion 203 of the resin film 20 and the grooved roller 21 also increases. This reliably prevents air from being caught between the resin films 20 during conveyance, thereby eliminating the wavy state. As a result, the hole 201 can be stably and reliably formed in the resin film 20.

For the relationship between the conveyance speed v and the holding angle θ, for example, a graph shown in FIG. 8 as a calibration curve is stored in the memory 102 of the control means 10 in advance. In addition, as a calibration curve, it is not limited to a graph, For example, a table | surface (table) may be sufficient. The control means 10 detects the conveyance speed v based on information from an encoder built in the motor 11 for winding up the resin film 20, for example. When the detection result is the conveyance speed v ₁ , the holding angle adjusting mechanism 4 is controlled so that the holding angle θ ₁ is reached (see FIG. 8). When the conveyance speed v ₂ is higher than the conveyance speed v ₁ , the holding angle adjusting mechanism 4 is controlled so that the holding angle θ ₂ is larger than the holding angle θ ₁ (see FIG. 8). In this way, the holding angle adjusting mechanism 4 is controlled by the control means 10 so as to adjust the size of the holding angle θ according to the magnitude of the conveyance speed v. Thereby, a wavy state can be reliably prevented, and therefore the hole processing for the resin film 20 can be stably performed.

  The adjustment range of the holding angle θ by the holding angle adjusting mechanism 4 is preferably not less than 0 degrees and not more than 180 degrees, and more preferably not less than 30 degrees and not more than 150 degrees. Thereby, the wavy state can be reliably prevented under various conditions such as the transport speed v, the thickness of the resin film 20, the elongation rate of the resin film 20, and the like.

  As described above, the movement support mechanism 41 can move the tensioners 25 and 26 together in the same direction. Thereby, compared with the case where one of the tensioners 25 and 26 is moved, the holding angle θ can be quickly adjusted.

  In addition, the holding angle adjusting mechanism 4 can adjust the tension in the transport direction with respect to the resin film 20 by the amount of movement of the tensioners 25 and 26. Thereby, in addition to the adjustment of the holding angle θ, the degree of adhesion between the contact portion 203 of the resin film 20 and the grooved roller 21 is also adjusted in accordance with the transport speed v. Thereby, a wavy state is prevented more reliably, and therefore the hole processing can be more suitably performed on the resin film 20.

  As shown in FIGS. 1 and 2, the outer diameters of the tensioners 25 and 26 are preferably smaller than the outer diameter of the grooved roller 21. Thereby, there is little slip between the resin film 20 and the roller 21 with a groove | channel, and the fluttering of the resin film 20 can be reduced.

Moreover, there exists a thing of the structure shown in FIG. 19 as the resin film 20 processed suitably with the processing apparatus 1. FIG. This resin film 20 is printed 204 on the half (left side in FIG. 19) from the center in the width direction. And in such a resin film 20, as shown in FIG. 20, it is thickness by the part to which the printing 204 of the left side in a figure was given, and the other side, ie, the plain part of the right side in a figure. Is different. Thus, there are a thick portion and a thin portion in the width direction of the resin film 20. For example, when the resin film 20 is a packaging bag 20C for packaging fruits and vegetables such as bananas, the thickness t _left on the left side in FIG. 20 is 33 μm, and the thickness t _right on the right side in FIG. 20 is 30 μm. Become.

  As described above, the resin film 20 having a thick portion and a thin portion in the width direction is likely to be in a wavy state during conveyance regardless of the conveyance speed v. Therefore, the processing apparatus 1 can adjust the size of the holding angle θ according to the degree of the difference in thickness between the thick part and the thin part. As a result, the adhesion between the resin film 20 and the grooved roller 21 is improved as described above, so that a wavy state is prevented and the resin film 20 can be stably perforated.

  As described above, the grooved roller 21 in which the holding angle θ is adjusted includes the first groove 212, the second groove 215, and the third groove 216 as described above.

  As shown in FIG. 4, the outer peripheral portion 211 of the grooved roller 21 has a ring shape along the circumferential direction, that is, along the direction orthogonal to the central axis 214 direction (longitudinal direction) of the grooved roller 21. A first groove 212 is formed. The number of the first grooves 212 is four in the configuration shown in FIG. This number is the same as the number of holes 201 along the width direction of the resin film 20. As described above, by irradiating the resin film 20 with the laser light L on each first groove 212, the hole 201 can be formed in the irradiated portion (see FIG. 3). Note that the interval between the four first grooves 212 preferably corresponds to the interval between the holes 201 formed in the resin film 20. For example, in the configuration shown in FIG. Are equally spaced. Of the four first grooves 212, the two first grooves 212 on the left side (one end side) of the outer peripheral portion 211 of the grooved roller 21 from the longitudinal direction 211a and the central portion 211a. The two first grooves 212 on the right side (the other end side) are arranged symmetrically with respect to the central portion. Hereinafter, the four first grooves 212 are referred to as “first groove 212a”, “first groove 212b”, “first groove 212c”, and “first groove 212d” in order from the left side.

  In addition, the portion on the left side from the central portion 211a of the outer peripheral portion 211 of the grooved roller 21 is inclined with respect to the direction of the central axis 214, and the end opposite to the central portion 211a is positioned forward in the rotational direction. A plurality of second grooves 215 whose end portions on the 211a side are located behind the grooved roller 21 in the rotation direction are formed. In addition, the portion on the right side from the central portion 211a is inclined with respect to the direction of the central axis 214, the end opposite to the central portion 211a is positioned forward in the rotational direction, and the end on the central portion 211a side is a grooved roller. A large number of third grooves 216 are formed at the rear of the rotation direction 21. Each second groove 215 and each third groove 216 are formed symmetrically with respect to the center portion 211a. In other words, each second groove 215 and each third groove 216 are formed so as to be inclined such that the distance p between them increases toward the rotation direction of the grooved roller 21.

  In addition, the length of the 2nd groove | channel 215 and the length of the 3rd groove | channel 216 are respectively shorter than the length which carried out the semicircle of the outer peripheral part 211 of the roller 21 with a groove | channel.

  As shown in FIG. 4, in the present embodiment, these second grooves 215 are grouped in four places as a second groove group 217 in which a plurality of second grooves 215 are gathered. In each second groove group 217, the second grooves 215 are arranged at equal intervals along the circumferential direction of the outer peripheral portion 211.

  The four second groove groups 217 are arranged at equal intervals along the direction of the central axis 214, and one second groove group 217 is arranged on the left side of the first groove 212a. Two second groove groups 217 are disposed between the groove 212a and the first groove 212b, and one second groove group 217 is disposed between the first groove 212b and the central portion 211a. Yes.

  Similar to the second groove 215, the third groove 216 is grouped in four places as a third groove group 218 in which a plurality of third grooves 216 are gathered together. In each third groove group 218, the third grooves 216 are arranged at equal intervals along the circumferential direction of the outer peripheral portion 211.

  Further, the four third groove groups 218 are arranged at equal intervals along the direction of the central axis 214, and one third groove group 218 is provided between the central portion 211a and the first groove 212c. Two third groove groups 218 are disposed between the first groove 212c and the first groove 212d, and one third groove group 218 is disposed on the right side of the first groove 212d. Yes.

The resin film 20 being conveyed is engaged with the second groove 215 as described above. Thereby, the 2nd groove | channel 215 can exhibit the function to provide tension | _{tensile_strength} TS _left from the center part 211a of the roller 21 with a groove | channel with respect to the resin film 20 reliably (refer FIG. 4). On the other hand, the resin film 20 being conveyed also engages with the third groove 216. Thereby, the 3rd groove | channel 216 can exhibit the function to provide the tension | _{tensile_strength} TS _right from the center part 211a of the grooved roller 21 to the right side with respect to the resin film 20 reliably (refer FIG. 4). As described above, the second groove 215 and the third groove 216 are arranged symmetrically with respect to the central portion 211a. As a result, the tension TS _left and the tension TS _right act evenly, and therefore, it is possible to reliably prevent displacement in the direction orthogonal to the transport direction of the resin film 20, that is, the left or right side in the direction of the central axis 214. . By preventing this displacement, the holes 201 can be stably formed in the resin film 20, and the formation position can be accurately set.

Further, since the tensions TS _left and TS _right are acting, the resin film 20 is prevented from wrinkling on the grooved roller 21. Thereby, the hole 201 can be stably formed with a fixed size. Moreover, the formation position of the hole 201 can be set more accurately.

Further, by adjusting the holding angle θ by the holding angle adjusting mechanism 4, the tensions TS _left and TS _right can also be adjusted. That is, as the holding angle θ increases, the contact area between the resin film 20 and the grooved roller 21 increases, and the degree of engagement of the resin film 20 with the second groove 215 also increases. In this case, the tensions TS _left and TS _right increase. On the other hand, as the holding angle θ decreases, the contact area between the resin film 20 and the grooved roller 21 decreases, and the degree of engagement of the resin film 20 with the second groove 215 also decreases. In this case, the tensions TS _left and TS _right decrease.

As shown in FIG. 4, each second groove 215 has the same inclination angle β ₂ with respect to the direction of the central axis 214. Further, each third groove 216 is also respectively, the inclination angle beta ₃ with respect to the central axis 214 direction same. Further, the inclination angle β ₂ and the inclination angle β ₃ are the same.

The inclination angles β ₂ and β ₃ are each preferably 15 degrees or more and 75 degrees or less, and more preferably 30 degrees or more and 60 degrees or less.

  With such an inclination angle, for example, when the second groove 215 and the third groove 216 are formed in the manufacturing process of the grooved roller 21, the formation can be performed easily and quickly. In addition, there is an advantage that the resin film 20 is stably conveyed, and thus the stability of the formation of the hole 201 in the resin film 20 can be further enhanced.

  In the present embodiment, each second groove 215 and each third groove 216 do not communicate with each first groove 212. Thereby, for example, the minute piece generated by the formation of the hole 201 is prevented from adhering to the resin film 20 from the first groove 212 via the second groove 215 or the third groove 216.

As shown in FIG. 5, the depth _{d 2} of the second groove 215, the depth _{d 3} of the third groove 216 is shallower is preferable than the depth _{d 1} of the first groove 212. The width _{w 2} of the second groove 215, the width _{w 3} of the third groove 216 is preferably larger than the width _{w 1} of the first groove.

This is because the width w ₂ and the width w ₃ affect the engagement of the resin film 20 by the second groove 215 and the third groove 216, and the depth d ₂ and the depth d ₃ are not so large. This is because there is no influence. Note that the first groove 212 needs to have a depth d ₁ and a width w ₁ sufficient to discharge the minute pieces.

The depths d ₂ and d ₃ are, for example, preferably 0.5% or more and 30% or less of the depth d ₁ , and more preferably 1% or more and 5% or less. For example, the widths w ₂ and w ₃ are preferably 10% or more and 80% or less of the width w ₁ , and more preferably 20% or more and 80% or less.

Second Embodiment
FIG. 9 is a graph showing the relationship between the resin film thickness and the holding angle in the resin film processing apparatus (second embodiment) of the present invention.

  Hereinafter, the second embodiment of the resin film processing apparatus of the present invention will be described with reference to this figure, but the description will focus on differences from the above-described embodiment, and the description of the same matters will be omitted.

  The present embodiment is the same as the first embodiment except that the conditions for adjusting the holding angle are different.

  When the conveyance speed v is constant, a waved state is more likely to occur when the resin film 20 is relatively thick and relatively thin. Therefore, in the present embodiment, the holding angle adjusting mechanism 4 is configured to adjust the size of the holding angle θ according to the thickness t of the resin film 20.

For the relationship between the thickness t and the holding angle θ, for example, a graph shown in FIG. 9 as a calibration curve is stored in the memory 102 of the control means 10 in advance. The thickness t is input to the memory 102 by an operator (operator) of the processing apparatus 1. When the input value is the thickness t ₁ , the holding angle adjusting mechanism 4 is controlled so as to be the holding angle θ ₃ (see FIG. 9). When the thickness t ₂ is larger than the thickness t ₁ , the holding angle adjusting mechanism 4 is controlled so that the holding angle θ ₄ is smaller than the holding angle θ ₃ (see FIG. 9).

  By the control as described above, the wavy state can be surely prevented, and therefore the hole processing for the resin film 20 can be stably performed.

<Third Embodiment>
FIG. 10 is a graph showing the relationship between the elongation rate of the resin film and the holding angle in the resin film processing apparatus (third embodiment) of the present invention.

  Hereinafter, the third embodiment of the resin film processing apparatus of the present invention will be described with reference to this figure, but the description will focus on differences from the above-described embodiment, and the description of the same matters will be omitted.

  The present embodiment is the same as the first embodiment except that the conditions for adjusting the holding angle are different.

  When the conveyance speed v is constant, a waved state is more likely to occur when the resin film 20 is relatively easy to stretch and when it is relatively difficult to stretch. Therefore, in the present embodiment, the holding angle adjusting mechanism 4 is configured to adjust the size of the holding angle θ from the ease of elongation of the resin film 20, that is, the magnitude of the elongation rate α.

As for the relationship between the elongation rate α and the holding angle θ, for example, a graph shown in FIG. 10 as a calibration curve is stored in the memory 102 of the control means 10 in advance. The elongation rate α is input to the memory 102 by the operator of the processing apparatus 1. When the input value was elongation alpha ₁ is embracing angle theta ₅ and so as to embrace angle adjustment mechanism 4 is controlled (see Figure 10). Further, when the elongation rate α ₂ is larger than the elongation rate α ₁ , the holding angle adjusting mechanism 4 is controlled so that the holding angle θ ₆ is larger than the holding angle θ ₅ (see FIG. 10).

  By the control as described above, the wavy state can be surely prevented, and therefore the hole processing for the resin film 20 can be stably performed.

  For example, polyethylene, which is a kind of thermoplastic resin, is a resin material that is relatively easy to stretch. When the resin film 20 is composed of this material, it may be difficult to apply excessive tension to the resin film 20. is there. In this way, when it is desired to suppress the tension as much as possible, it is a preferable configuration to prevent the wavy state by adjusting the holding angle θ.

<Fourth embodiment>
FIG. 11: is a front view which shows 4th Embodiment of the resin film processing apparatus of this invention. 12 and 13 are cross-sectional views showing a state in which holes are formed in the resin film by the resin film processing apparatus shown in FIG.

Hereinafter, the fourth embodiment of the resin film processing apparatus of the present invention will be described with reference to these drawings. However, the difference from the above-described embodiment will be mainly described, and description of similar matters will be omitted.
This embodiment is the same as the first embodiment except that the configuration of the hole forming means is different.

  As shown in FIG. 11, in the present embodiment, the hole forming means 3 includes a moving support mechanism (laser light irradiation unit support mechanism) 32 that supports the laser light irradiation unit 31 so as to be movable in the vertical direction. The moving support mechanism 32 includes a connecting member 321 connected to the laser light irradiation unit 31, a guide rail 322 that guides the connecting member 321, and a drive source 323 that moves and drives the connecting member 321 along the guide rail 322. Has been.

  The guide rail 322 is arranged and fixed along the vertical direction on the frame that supports the entire processing apparatus 1.

  For example, the drive source 323 may include two pulleys, an endless belt wound around the pulleys, and a motor connected to one of the two pulleys.

  By the operation of the moving support mechanism 32 having such a configuration, the laser beam irradiation unit 31 can approach (see FIG. 12) and separate (see FIG. 13) the first groove 212 of the grooved roller 21. . For example, in the state shown in FIG. 12, the laser beam irradiation unit 31 is closest to the grooved roller 21, thereby maximizing the irradiation area of the laser beam L to the resin film 20, and thus the maximum hole 201. Can be formed. In the state shown in FIG. 13, the laser beam irradiation unit 31 is farthest from the grooved roller 21, thereby minimizing the irradiation area of the laser beam L to the resin film 20, and thus the minimum hole 201. Can be formed.

  Thus, in the processing apparatus 1, the size of the hole 201 can be changed according to the separation distance of the laser light irradiation unit 31 from the grooved roller 21.

<Fifth Embodiment>
FIG. 14 is a plan view of a grooved roller provided in the resin film processing apparatus (fifth embodiment) of the present invention.

  Hereinafter, the fifth embodiment of the resin film processing apparatus of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-described embodiment, and the description of the same matters will be omitted.

  This embodiment is the same as the first embodiment except that the inclination angles of the second groove and the third groove are different.

As shown in FIG. 14, in this embodiment, in each second groove group 217, the inclination angles β ₂ of the second grooves 215 belonging to the second groove group 217 are the same, but are adjacent to each other in the direction of the central axis 214. In the groove groups 217, the inclination angle β ₂ of the second groove 215 belonging to one second groove group 217, and the inclination angle β ₂ of the second groove 215 belonging to the other second groove group 217, Are different, that is, the inclination angle β ₂ of the second groove 215 located on the central portion 211a side is larger than the inclination angle β ₂ of the second groove 215 located on the left side.

In each of the third groove group 218, the inclination angle beta ₃ of the third groove 216 belonging to it, is the same to each other, in the third groove group 218 adjacent to the central axis 214 direction, a third of the one an inclination angle beta ₃ of the third groove 216 belonging to the group of grooves 218, the inclination angle beta ₃ of the third groove 216 belonging to the other of the third groove group 218 are different, i.e., the central portion 211a side The inclination angle β ₃ of the third groove 216 located at the right is larger than the inclination angle β ₃ of the third groove 216 located on the right side.

As described above, in this embodiment, the inclination angle beta ₂ of the second groove 215 and the inclination angle beta ₃ of the third groove 216 increases as each approaching the central portion 211a, the rate of increase, both the same It is.

For example, when the resin film 20 is slippery near the central portion, the second groove 215 or the third groove 216 located on the central portion 211a side engages the vicinity of the central portion of the resin film 20. Surely done. Thereby, tension | _{tensile_strength TSleft} , _TSright can be reliably provided with respect to the resin film 20. FIG.

<Sixth Embodiment>
FIG. 15 is a plan view of a grooved roller provided in the resin film processing apparatus (sixth embodiment) of the present invention.

  Hereinafter, the sixth embodiment of the resin film processing apparatus of the present invention will be described with reference to this drawing. However, the difference from the above-described embodiment will be mainly described, and description of similar matters will be omitted.

  This embodiment is the same as the first embodiment except that the inclination angles of the second groove and the third groove are different.

As shown in FIG. 15, in this embodiment, the inclination angle β ₂ of the second groove 215 located on the center portion 211a side is smaller than the inclination angle β ₂ of the second groove 215 located on the left side. In addition, the inclination angle β ₃ of the third groove 216 located on the central portion 211a side is smaller than the inclination angle β ₃ of the third groove 216 located on the right side.

As described above, in this embodiment, the inclination angle beta ₂ of the second groove 215 and the inclination angle beta ₃ of the third groove 216 decreases as the distance from each center portion 211a, the reduction rate, both the same It is.

For example, when the resin film 20 is slippery near the left edge or the right edge, the resin film 20 is formed by the second groove 215 located on the left side or the third groove 216 located on the right side. Engagement in the vicinity of each of the edges is ensured. Thereby, tension | _{tensile_strength TSleft} , _TSright can be reliably provided with respect to the resin film 20. FIG.

<Seventh embodiment>
FIG. 16 is a plan view of a grooved roller provided in the resin film processing apparatus (seventh embodiment) of the present invention.

  Hereinafter, the seventh embodiment of the resin film processing apparatus of the present invention will be described with reference to this figure, but the description will focus on differences from the above-described embodiment, and the description of the same matters will be omitted.

  The present embodiment is the same as the first embodiment except that the shapes of the second groove and the third groove are different.

  As shown in FIG. 16, in the present embodiment, the second groove 215 is continuously formed from the central portion 211a of the grooved roller 21 toward the left side, and has a spiral shape. Accordingly, the second groove 215 communicates with the first grooves 212a and 212b.

  The third groove 216 is continuously formed from the central portion 211a of the grooved roller 21 toward the right side, and has a spiral shape. Thus, the third groove 216 communicates with the first grooves 212c and 212d.

  And, for example, even if the minute piece generated by the formation of the hole 201 enters the second groove 215 or the third groove 216 from the first groove 212, the grooved roller 21 is rotating. The minute piece can pass through the groove in which it enters, and is therefore discharged toward the left or right side of the grooved roller 21. There is also an advantage that the adhesion between the resin film 20 and the grooved roller 21 is improved.

<Eighth Embodiment>
FIG. 17 is an enlarged plan view of a grooved roller provided in the resin film processing apparatus (eighth embodiment) of the present invention.

Hereinafter, the eighth embodiment of the resin film processing apparatus of the present invention will be described with reference to this drawing. However, the difference from the above-described embodiment will be mainly described, and the description of the same matters will be omitted.
This embodiment is the same as the first embodiment except that the shape of the first groove is different.

As shown in FIG. 17, in the present embodiment, each first groove 212 has its width w ₁ changed along the direction in which the first groove 212 is formed, that is, rotating around the central axis 214. A width changing portion 219 that gradually decreases in the direction is provided. A large number of width changing portions 219 are provided along the direction in which the first groove 212 is formed.

  By such a width change part 219, it is possible to prevent the resin film 20 from slipping in the direction opposite to the conveyance direction, and thus the resin film 20 can be reliably conveyed.

  As mentioned above, although the resin film processing apparatus of this invention was demonstrated about embodiment of illustration, this invention is not limited to this, Each part which comprises a resin film processing apparatus is arbitrary which can exhibit the same function. It can be replaced with the configuration of Moreover, arbitrary components may be added.

  The resin film processing apparatus of the present invention may be a combination of any two or more configurations (features) of the above embodiments.

  In addition, the number of grooves formed on the grooved roller is the same as the number of holes along the width direction of the resin film in each of the above embodiments, but is not limited thereto, and is along the width direction of the resin film. More than the number of holes. In this case, the freedom degree of the processing position of the width direction of the resin film of each hole can be improved.

  In addition, the number of first grooves, second grooves, and third grooves formed on the grooved roller is not particularly limited, and there are a plurality of the grooves in each of the above embodiments. Good.

  In addition, between the first grooves adjacent to each other in the central axis direction of the grooved roller 21, a plurality of second grooves and a plurality of third grooves are disposed in each of the embodiments. It is not limited to this, What is necessary is just to arrange | position one by one.

  Further, the laser irradiation direction of the resin film is directed to the groove of the grooved roller in each of the above embodiments, but is not limited to this, and when the resin film is not wavy, the grooved roller You may turn to the side that touches.

In addition, the tensioner on the upstream side in the transport direction of the resin film and the tensioner on the downstream side in the transport direction of the resin film are arranged symmetrically with respect to the grooved roller in each of the above embodiments, but are not limited thereto. May be asymmetric.
In the conveying means, an idler may be disposed between the tensioners.

  In addition, the holding angle adjusting roller of the holding angle adjusting mechanism is arranged on both the upstream side and the downstream side in the transport direction of the resin film with respect to the grooved roller 21 in each of the embodiments, but is not limited thereto. For example, you may arrange | position at one of the conveyance direction upstream and downstream.

  In addition, the holding angle adjusting mechanism is configured to collectively move the two holding angle adjusting rollers in the same direction in each of the above embodiments, but is not limited thereto, and each holding angle adjusting roller is respectively You may be comprised so that it may move independently.

In addition, the resin film processing apparatus may include a mechanism that maintains the parallelism between the rollers when the roller (tensioner) that constitutes the holding angle adjusting mechanism moves up and down. In this case, it is possible to prevent the parallelism of each roller from being shifted. Thereby, the induction | guidance | derivation of the slack of a resin film and a wave can be reduced.
Moreover, in the resin film processing apparatus of the present invention, the holding angle adjusting mechanism may be omitted.

1 Resin film processing equipment (processing equipment)
2 Conveying means 21 Rolled roller 211 Outer peripheral part 211a Central part 212, 212a, 212b, 212c, 212d First groove 213 Center 214 Center axis (rotating shaft)
215 2nd groove 216 3rd groove 217 2nd groove group 218 3rd groove group 219 Width change part 22, 23, 24, 25, 26, 27, 28, 29 Tensioner 3 Hole formation means 31 Laser beam irradiation Part 311 Irradiation port 32 Movement support mechanism (laser beam irradiation part support mechanism)
321 Connecting member 322 Guide rail 323 Drive source 4 Holding angle adjusting mechanism 41 Movement support mechanism 42 Motor 43 Coupling 44 Ball screw 441 Screw shaft 442 Nut 45 Linear guide 451 Rail member 452 Slide member 46 Connecting member 461 Left end 462 Right end 10 Control means 101 CPU (Central Processing Unit)
102 memory 11 the motor 20 the resin film 20A perforated resin film 20B preform 20C packaging bag 201 hole 202 bent portion 203 contact portion 203a upstream end 203b downstream end 204 Print L laser beam TS _{left TS. Right} tension d _{1, d} 2, _{d 3} Depth p interval t, t ₁ , t ₂ , t _left , t _right Thickness v, v ₁ , v ₂ Conveying speeds w ₁ , w ₂ , w ₃ width α, α ₁ , α ₂ Elongation rate β ₂ , β ₃ tilt angles θ, θ ₁ , θ ₂ , θ ₃ , θ ₄ , θ ₅ , θ ₆ holding angle (holding angle)

Claims (11)

It is a conveying means for conveying a long resin film along its longitudinal direction, and the outer shape is cylindrical, and the resin film is in contact with the outer periphery of the resin film in the longitudinal direction. Conveying means having a plurality of rollers rotating while
A hole forming unit having a laser beam irradiation unit that forms a hole in the irradiated part by irradiating the resin film in the middle of being conveyed by the conveying unit with a laser beam;
At least one of the plurality of rollers is disposed to face the laser beam irradiation unit, and at least one roller formed on the outer peripheral portion of the roller along a direction orthogonal to the longitudinal direction thereof. A first groove;
At least one second groove formed to be inclined with respect to the longitudinal direction from a central portion in the longitudinal direction of the outer peripheral portion to one end side;
The other end portion from the central portion of the outer peripheral portion, have a said second groove and at least one third groove formed symmetrically inclined with respect to said central portion,
A plurality of the first grooves are formed at intervals along the longitudinal direction,
Each of the second groove and the third groove is disposed between the first grooves adjacent to each other in the longitudinal direction, and is not in communication with the first groove. Resin film processing equipment. It is a conveying means for conveying a long resin film along its longitudinal direction, and the outer shape is cylindrical, and the resin film is in contact with the outer periphery of the resin film in the longitudinal direction. Conveying means having a plurality of rollers rotating while
A hole forming unit having a laser beam irradiation unit that forms a hole in the irradiated part by irradiating the resin film in the middle of being conveyed by the conveying unit with a laser beam;
At least one of the plurality of rollers is disposed to face the laser beam irradiation unit, and at least one roller formed on the outer peripheral portion of the roller along a direction orthogonal to the longitudinal direction thereof. A first groove;
At least one second groove formed to be inclined with respect to the longitudinal direction from a central portion in the longitudinal direction of the outer peripheral portion to one end side;
The other end portion from the central portion of the outer peripheral portion, have a said second groove and at least one third groove formed symmetrically inclined with respect to said central portion,
A plurality of the first grooves are formed at intervals along the longitudinal direction,
Each of the second groove and the third groove is disposed between the first grooves adjacent to each other in the longitudinal direction, and communicates with the first groove. Resin film processing equipment. Each of the second grooves has the same inclination angle with respect to the longitudinal direction,
The resin film processing apparatus according to claim 1 , wherein each of the third grooves has the same inclination angle with respect to the longitudinal direction. The second grooves adjacent to each other in the longitudinal direction have different inclination angles with respect to the longitudinal direction,
The resin film processing apparatus according to claim 3 , wherein the third grooves adjacent in the longitudinal direction have different inclination angles with respect to the longitudinal direction. Of the second grooves adjacent to each other in the longitudinal direction, the inclination angle of the second groove located on the center portion side is larger than the inclination angle of the second groove located on the one end side,
Among the third grooves adjacent to each other in the longitudinal direction, the inclination angle of the third groove located on the center side is larger than the inclination angle of the third groove located on the other end side. The resin film processing apparatus of Claim 4 . Of the second grooves adjacent to each other in the longitudinal direction, the inclination angle of the second groove located on the center side is smaller than the inclination angle of the second groove located on the one end side,
Among the third grooves adjacent to each other in the longitudinal direction, the inclination angle of the third groove located on the center side is smaller than the inclination angle of the third groove located on the other end side. The resin film processing apparatus of Claim 4 . It is a conveying means for conveying a long resin film along its longitudinal direction, and the outer shape is cylindrical, and the resin film is in contact with the outer periphery of the resin film in the longitudinal direction. Conveying means having a plurality of rollers rotating while
A hole forming unit having a laser beam irradiation unit that forms a hole in the irradiated part by irradiating the resin film in the middle of being conveyed by the conveying unit with a laser beam;
At least one of the plurality of rollers is disposed to face the laser beam irradiation unit, and at least one roller formed on the outer peripheral portion of the roller along a direction orthogonal to the longitudinal direction thereof. A first groove;
At least one second groove formed to be inclined with respect to the longitudinal direction from a central portion in the longitudinal direction of the outer peripheral portion to one end side;
The other end portion from the central portion of the outer peripheral portion, have a said second groove and at least one third groove formed symmetrically inclined with respect to said central portion,
The resin film processing apparatus, wherein each of the second groove and the third groove has a depth shallower than that of the first groove . It is a conveying means for conveying a long resin film along its longitudinal direction, and the outer shape is cylindrical, and the resin film is in contact with the outer periphery of the resin film in the longitudinal direction. Conveying means having a plurality of rollers rotating while
A hole forming unit having a laser beam irradiation unit that forms a hole in the irradiated part by irradiating the resin film in the middle of being conveyed by the conveying unit with a laser beam;
At least one of the plurality of rollers is disposed to face the laser beam irradiation unit, and at least one roller formed on the outer peripheral portion of the roller along a direction orthogonal to the longitudinal direction thereof. A first groove;
At least one second groove formed to be inclined with respect to the longitudinal direction from a central portion in the longitudinal direction of the outer peripheral portion to one end side;
The other end portion from the central portion of the outer peripheral portion, have a said second groove and at least one third groove formed symmetrically inclined with respect to said central portion,
The resin film processing apparatus according to claim 1, wherein the first groove has a width changing portion whose width changes along a direction in which the first groove is formed . On the first groove, the hole is formed in the resin film,
The second groove has a function of applying tension from the central portion to the one end side with respect to the resin film,
The resin film processing apparatus according to any one of claims 1 to 8, wherein the third groove has a function of applying a tension from the central portion to the other end side of the resin film.   The resin film processing apparatus according to claim 1, wherein each of the second groove and the third groove has a spiral shape. The resin film is made of a thermoplastic resin,
The resin film processing apparatus according to any one of claims 1 to 10 , wherein the laser light irradiated by the laser light irradiation unit is CO ₂ laser light.

Images